1 /* DWARF 2 debugging format support for GDB.
3 Copyright (C) 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
4 2004, 2005, 2006, 2007, 2008, 2009, 2010
5 Free Software Foundation, Inc.
7 Adapted by Gary Funck (gary@intrepid.com), Intrepid Technology,
8 Inc. with support from Florida State University (under contract
9 with the Ada Joint Program Office), and Silicon Graphics, Inc.
10 Initial contribution by Brent Benson, Harris Computer Systems, Inc.,
11 based on Fred Fish's (Cygnus Support) implementation of DWARF 1
14 This file is part of GDB.
16 This program is free software; you can redistribute it and/or modify
17 it under the terms of the GNU General Public License as published by
18 the Free Software Foundation; either version 3 of the License, or
19 (at your option) any later version.
21 This program is distributed in the hope that it will be useful,
22 but WITHOUT ANY WARRANTY; without even the implied warranty of
23 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
24 GNU General Public License for more details.
26 You should have received a copy of the GNU General Public License
27 along with this program. If not, see <http://www.gnu.org/licenses/>. */
37 #include "expression.h"
38 #include "filenames.h" /* for DOSish file names */
41 #include "complaints.h"
43 #include "dwarf2expr.h"
44 #include "dwarf2loc.h"
45 #include "cp-support.h"
53 #include "gdb_string.h"
54 #include "gdb_assert.h"
55 #include <sys/types.h>
62 #define MAP_FAILED ((void *) -1)
67 /* .debug_info header for a compilation unit
68 Because of alignment constraints, this structure has padding and cannot
69 be mapped directly onto the beginning of the .debug_info section. */
70 typedef struct comp_unit_header
72 unsigned int length; /* length of the .debug_info
74 unsigned short version; /* version number -- 2 for DWARF
76 unsigned int abbrev_offset; /* offset into .debug_abbrev section */
77 unsigned char addr_size; /* byte size of an address -- 4 */
80 #define _ACTUAL_COMP_UNIT_HEADER_SIZE 11
83 /* .debug_pubnames header
84 Because of alignment constraints, this structure has padding and cannot
85 be mapped directly onto the beginning of the .debug_info section. */
86 typedef struct pubnames_header
88 unsigned int length; /* length of the .debug_pubnames
90 unsigned char version; /* version number -- 2 for DWARF
92 unsigned int info_offset; /* offset into .debug_info section */
93 unsigned int info_size; /* byte size of .debug_info section
97 #define _ACTUAL_PUBNAMES_HEADER_SIZE 13
99 /* .debug_pubnames header
100 Because of alignment constraints, this structure has padding and cannot
101 be mapped directly onto the beginning of the .debug_info section. */
102 typedef struct aranges_header
104 unsigned int length; /* byte len of the .debug_aranges
106 unsigned short version; /* version number -- 2 for DWARF
108 unsigned int info_offset; /* offset into .debug_info section */
109 unsigned char addr_size; /* byte size of an address */
110 unsigned char seg_size; /* byte size of segment descriptor */
113 #define _ACTUAL_ARANGES_HEADER_SIZE 12
115 /* .debug_line statement program prologue
116 Because of alignment constraints, this structure has padding and cannot
117 be mapped directly onto the beginning of the .debug_info section. */
118 typedef struct statement_prologue
120 unsigned int total_length; /* byte length of the statement
122 unsigned short version; /* version number -- 2 for DWARF
124 unsigned int prologue_length; /* # bytes between prologue &
126 unsigned char minimum_instruction_length; /* byte size of
128 unsigned char default_is_stmt; /* initial value of is_stmt
131 unsigned char line_range;
132 unsigned char opcode_base; /* number assigned to first special
134 unsigned char *standard_opcode_lengths;
138 /* When non-zero, dump DIEs after they are read in. */
139 static int dwarf2_die_debug = 0;
143 /* When set, the file that we're processing is known to have debugging
144 info for C++ namespaces. GCC 3.3.x did not produce this information,
145 but later versions do. */
147 static int processing_has_namespace_info;
149 static const struct objfile_data *dwarf2_objfile_data_key;
151 struct dwarf2_section_info
159 struct dwarf2_per_objfile
161 struct dwarf2_section_info info;
162 struct dwarf2_section_info abbrev;
163 struct dwarf2_section_info line;
164 struct dwarf2_section_info pubnames;
165 struct dwarf2_section_info aranges;
166 struct dwarf2_section_info loc;
167 struct dwarf2_section_info macinfo;
168 struct dwarf2_section_info str;
169 struct dwarf2_section_info ranges;
170 struct dwarf2_section_info types;
171 struct dwarf2_section_info frame;
172 struct dwarf2_section_info eh_frame;
174 /* A list of all the compilation units. This is used to locate
175 the target compilation unit of a particular reference. */
176 struct dwarf2_per_cu_data **all_comp_units;
178 /* The number of compilation units in ALL_COMP_UNITS. */
181 /* A chain of compilation units that are currently read in, so that
182 they can be freed later. */
183 struct dwarf2_per_cu_data *read_in_chain;
185 /* A table mapping .debug_types signatures to its signatured_type entry.
186 This is NULL if the .debug_types section hasn't been read in yet. */
187 htab_t signatured_types;
189 /* A flag indicating wether this objfile has a section loaded at a
191 int has_section_at_zero;
194 static struct dwarf2_per_objfile *dwarf2_per_objfile;
196 /* names of the debugging sections */
198 /* Note that if the debugging section has been compressed, it might
199 have a name like .zdebug_info. */
201 #define INFO_SECTION "debug_info"
202 #define ABBREV_SECTION "debug_abbrev"
203 #define LINE_SECTION "debug_line"
204 #define PUBNAMES_SECTION "debug_pubnames"
205 #define ARANGES_SECTION "debug_aranges"
206 #define LOC_SECTION "debug_loc"
207 #define MACINFO_SECTION "debug_macinfo"
208 #define STR_SECTION "debug_str"
209 #define RANGES_SECTION "debug_ranges"
210 #define TYPES_SECTION "debug_types"
211 #define FRAME_SECTION "debug_frame"
212 #define EH_FRAME_SECTION "eh_frame"
214 /* local data types */
216 /* We hold several abbreviation tables in memory at the same time. */
217 #ifndef ABBREV_HASH_SIZE
218 #define ABBREV_HASH_SIZE 121
221 /* The data in a compilation unit header, after target2host
222 translation, looks like this. */
223 struct comp_unit_head
227 unsigned char addr_size;
228 unsigned char signed_addr_p;
229 unsigned int abbrev_offset;
231 /* Size of file offsets; either 4 or 8. */
232 unsigned int offset_size;
234 /* Size of the length field; either 4 or 12. */
235 unsigned int initial_length_size;
237 /* Offset to the first byte of this compilation unit header in the
238 .debug_info section, for resolving relative reference dies. */
241 /* Offset to first die in this cu from the start of the cu.
242 This will be the first byte following the compilation unit header. */
243 unsigned int first_die_offset;
246 /* Internal state when decoding a particular compilation unit. */
249 /* The objfile containing this compilation unit. */
250 struct objfile *objfile;
252 /* The header of the compilation unit. */
253 struct comp_unit_head header;
255 /* Base address of this compilation unit. */
256 CORE_ADDR base_address;
258 /* Non-zero if base_address has been set. */
261 struct function_range *first_fn, *last_fn, *cached_fn;
263 /* The language we are debugging. */
264 enum language language;
265 const struct language_defn *language_defn;
267 const char *producer;
269 /* The generic symbol table building routines have separate lists for
270 file scope symbols and all all other scopes (local scopes). So
271 we need to select the right one to pass to add_symbol_to_list().
272 We do it by keeping a pointer to the correct list in list_in_scope.
274 FIXME: The original dwarf code just treated the file scope as the
275 first local scope, and all other local scopes as nested local
276 scopes, and worked fine. Check to see if we really need to
277 distinguish these in buildsym.c. */
278 struct pending **list_in_scope;
280 /* DWARF abbreviation table associated with this compilation unit. */
281 struct abbrev_info **dwarf2_abbrevs;
283 /* Storage for the abbrev table. */
284 struct obstack abbrev_obstack;
286 /* Hash table holding all the loaded partial DIEs. */
289 /* Storage for things with the same lifetime as this read-in compilation
290 unit, including partial DIEs. */
291 struct obstack comp_unit_obstack;
293 /* When multiple dwarf2_cu structures are living in memory, this field
294 chains them all together, so that they can be released efficiently.
295 We will probably also want a generation counter so that most-recently-used
296 compilation units are cached... */
297 struct dwarf2_per_cu_data *read_in_chain;
299 /* Backchain to our per_cu entry if the tree has been built. */
300 struct dwarf2_per_cu_data *per_cu;
302 /* Pointer to the die -> type map. Although it is stored
303 permanently in per_cu, we copy it here to avoid double
307 /* How many compilation units ago was this CU last referenced? */
310 /* A hash table of die offsets for following references. */
313 /* Full DIEs if read in. */
314 struct die_info *dies;
316 /* A set of pointers to dwarf2_per_cu_data objects for compilation
317 units referenced by this one. Only set during full symbol processing;
318 partial symbol tables do not have dependencies. */
321 /* Header data from the line table, during full symbol processing. */
322 struct line_header *line_header;
324 /* Mark used when releasing cached dies. */
325 unsigned int mark : 1;
327 /* This flag will be set if this compilation unit might include
328 inter-compilation-unit references. */
329 unsigned int has_form_ref_addr : 1;
331 /* This flag will be set if this compilation unit includes any
332 DW_TAG_namespace DIEs. If we know that there are explicit
333 DIEs for namespaces, we don't need to try to infer them
334 from mangled names. */
335 unsigned int has_namespace_info : 1;
338 /* Persistent data held for a compilation unit, even when not
339 processing it. We put a pointer to this structure in the
340 read_symtab_private field of the psymtab. If we encounter
341 inter-compilation-unit references, we also maintain a sorted
342 list of all compilation units. */
344 struct dwarf2_per_cu_data
346 /* The start offset and length of this compilation unit. 2**29-1
347 bytes should suffice to store the length of any compilation unit
348 - if it doesn't, GDB will fall over anyway.
349 NOTE: Unlike comp_unit_head.length, this length includes
350 initial_length_size. */
352 unsigned int length : 29;
354 /* Flag indicating this compilation unit will be read in before
355 any of the current compilation units are processed. */
356 unsigned int queued : 1;
358 /* This flag will be set if we need to load absolutely all DIEs
359 for this compilation unit, instead of just the ones we think
360 are interesting. It gets set if we look for a DIE in the
361 hash table and don't find it. */
362 unsigned int load_all_dies : 1;
364 /* Non-zero if this CU is from .debug_types.
365 Otherwise it's from .debug_info. */
366 unsigned int from_debug_types : 1;
368 /* Set iff currently read in. */
369 struct dwarf2_cu *cu;
371 /* If full symbols for this CU have been read in, then this field
372 holds a map of DIE offsets to types. It isn't always possible
373 to reconstruct this information later, so we have to preserve
377 /* The partial symbol table associated with this compilation unit,
378 or NULL for partial units (which do not have an associated
380 struct partial_symtab *psymtab;
383 /* Entry in the signatured_types hash table. */
385 struct signatured_type
389 /* Offset in .debug_types of the TU (type_unit) for this type. */
392 /* Offset in .debug_types of the type defined by this TU. */
393 unsigned int type_offset;
395 /* The CU(/TU) of this type. */
396 struct dwarf2_per_cu_data per_cu;
399 /* Struct used to pass misc. parameters to read_die_and_children, et. al.
400 which are used for both .debug_info and .debug_types dies.
401 All parameters here are unchanging for the life of the call.
402 This struct exists to abstract away the constant parameters of
405 struct die_reader_specs
407 /* The bfd of this objfile. */
410 /* The CU of the DIE we are parsing. */
411 struct dwarf2_cu *cu;
413 /* Pointer to start of section buffer.
414 This is either the start of .debug_info or .debug_types. */
415 const gdb_byte *buffer;
418 /* The line number information for a compilation unit (found in the
419 .debug_line section) begins with a "statement program header",
420 which contains the following information. */
423 unsigned int total_length;
424 unsigned short version;
425 unsigned int header_length;
426 unsigned char minimum_instruction_length;
427 unsigned char default_is_stmt;
429 unsigned char line_range;
430 unsigned char opcode_base;
432 /* standard_opcode_lengths[i] is the number of operands for the
433 standard opcode whose value is i. This means that
434 standard_opcode_lengths[0] is unused, and the last meaningful
435 element is standard_opcode_lengths[opcode_base - 1]. */
436 unsigned char *standard_opcode_lengths;
438 /* The include_directories table. NOTE! These strings are not
439 allocated with xmalloc; instead, they are pointers into
440 debug_line_buffer. If you try to free them, `free' will get
442 unsigned int num_include_dirs, include_dirs_size;
445 /* The file_names table. NOTE! These strings are not allocated
446 with xmalloc; instead, they are pointers into debug_line_buffer.
447 Don't try to free them directly. */
448 unsigned int num_file_names, file_names_size;
452 unsigned int dir_index;
453 unsigned int mod_time;
455 int included_p; /* Non-zero if referenced by the Line Number Program. */
456 struct symtab *symtab; /* The associated symbol table, if any. */
459 /* The start and end of the statement program following this
460 header. These point into dwarf2_per_objfile->line_buffer. */
461 gdb_byte *statement_program_start, *statement_program_end;
464 /* When we construct a partial symbol table entry we only
465 need this much information. */
466 struct partial_die_info
468 /* Offset of this DIE. */
471 /* DWARF-2 tag for this DIE. */
472 ENUM_BITFIELD(dwarf_tag) tag : 16;
474 /* Assorted flags describing the data found in this DIE. */
475 unsigned int has_children : 1;
476 unsigned int is_external : 1;
477 unsigned int is_declaration : 1;
478 unsigned int has_type : 1;
479 unsigned int has_specification : 1;
480 unsigned int has_pc_info : 1;
482 /* Flag set if the SCOPE field of this structure has been
484 unsigned int scope_set : 1;
486 /* Flag set if the DIE has a byte_size attribute. */
487 unsigned int has_byte_size : 1;
489 /* The name of this DIE. Normally the value of DW_AT_name, but
490 sometimes DW_TAG_MIPS_linkage_name or a string computed in some
494 /* The scope to prepend to our children. This is generally
495 allocated on the comp_unit_obstack, so will disappear
496 when this compilation unit leaves the cache. */
499 /* The location description associated with this DIE, if any. */
500 struct dwarf_block *locdesc;
502 /* If HAS_PC_INFO, the PC range associated with this DIE. */
506 /* Pointer into the info_buffer (or types_buffer) pointing at the target of
507 DW_AT_sibling, if any. */
510 /* If HAS_SPECIFICATION, the offset of the DIE referred to by
511 DW_AT_specification (or DW_AT_abstract_origin or
513 unsigned int spec_offset;
515 /* Pointers to this DIE's parent, first child, and next sibling,
517 struct partial_die_info *die_parent, *die_child, *die_sibling;
520 /* This data structure holds the information of an abbrev. */
523 unsigned int number; /* number identifying abbrev */
524 enum dwarf_tag tag; /* dwarf tag */
525 unsigned short has_children; /* boolean */
526 unsigned short num_attrs; /* number of attributes */
527 struct attr_abbrev *attrs; /* an array of attribute descriptions */
528 struct abbrev_info *next; /* next in chain */
533 ENUM_BITFIELD(dwarf_attribute) name : 16;
534 ENUM_BITFIELD(dwarf_form) form : 16;
537 /* Attributes have a name and a value */
540 ENUM_BITFIELD(dwarf_attribute) name : 16;
541 ENUM_BITFIELD(dwarf_form) form : 15;
543 /* Has DW_STRING already been updated by dwarf2_canonicalize_name? This
544 field should be in u.str (existing only for DW_STRING) but it is kept
545 here for better struct attribute alignment. */
546 unsigned int string_is_canonical : 1;
551 struct dwarf_block *blk;
555 struct signatured_type *signatured_type;
560 /* This data structure holds a complete die structure. */
563 /* DWARF-2 tag for this DIE. */
564 ENUM_BITFIELD(dwarf_tag) tag : 16;
566 /* Number of attributes */
567 unsigned short num_attrs;
572 /* Offset in .debug_info or .debug_types section. */
575 /* The dies in a compilation unit form an n-ary tree. PARENT
576 points to this die's parent; CHILD points to the first child of
577 this node; and all the children of a given node are chained
578 together via their SIBLING fields, terminated by a die whose
580 struct die_info *child; /* Its first child, if any. */
581 struct die_info *sibling; /* Its next sibling, if any. */
582 struct die_info *parent; /* Its parent, if any. */
584 /* An array of attributes, with NUM_ATTRS elements. There may be
585 zero, but it's not common and zero-sized arrays are not
586 sufficiently portable C. */
587 struct attribute attrs[1];
590 struct function_range
593 CORE_ADDR lowpc, highpc;
595 struct function_range *next;
598 /* Get at parts of an attribute structure */
600 #define DW_STRING(attr) ((attr)->u.str)
601 #define DW_STRING_IS_CANONICAL(attr) ((attr)->string_is_canonical)
602 #define DW_UNSND(attr) ((attr)->u.unsnd)
603 #define DW_BLOCK(attr) ((attr)->u.blk)
604 #define DW_SND(attr) ((attr)->u.snd)
605 #define DW_ADDR(attr) ((attr)->u.addr)
606 #define DW_SIGNATURED_TYPE(attr) ((attr)->u.signatured_type)
608 /* Blocks are a bunch of untyped bytes. */
615 #ifndef ATTR_ALLOC_CHUNK
616 #define ATTR_ALLOC_CHUNK 4
619 /* Allocate fields for structs, unions and enums in this size. */
620 #ifndef DW_FIELD_ALLOC_CHUNK
621 #define DW_FIELD_ALLOC_CHUNK 4
624 /* A zeroed version of a partial die for initialization purposes. */
625 static struct partial_die_info zeroed_partial_die;
627 /* FIXME: We might want to set this from BFD via bfd_arch_bits_per_byte,
628 but this would require a corresponding change in unpack_field_as_long
630 static int bits_per_byte = 8;
632 /* The routines that read and process dies for a C struct or C++ class
633 pass lists of data member fields and lists of member function fields
634 in an instance of a field_info structure, as defined below. */
637 /* List of data member and baseclasses fields. */
640 struct nextfield *next;
645 *fields, *baseclasses;
647 /* Number of fields (including baseclasses). */
650 /* Number of baseclasses. */
653 /* Set if the accesibility of one of the fields is not public. */
654 int non_public_fields;
656 /* Member function fields array, entries are allocated in the order they
657 are encountered in the object file. */
660 struct nextfnfield *next;
661 struct fn_field fnfield;
665 /* Member function fieldlist array, contains name of possibly overloaded
666 member function, number of overloaded member functions and a pointer
667 to the head of the member function field chain. */
672 struct nextfnfield *head;
676 /* Number of entries in the fnfieldlists array. */
680 /* One item on the queue of compilation units to read in full symbols
682 struct dwarf2_queue_item
684 struct dwarf2_per_cu_data *per_cu;
685 struct dwarf2_queue_item *next;
688 /* The current queue. */
689 static struct dwarf2_queue_item *dwarf2_queue, *dwarf2_queue_tail;
691 /* Loaded secondary compilation units are kept in memory until they
692 have not been referenced for the processing of this many
693 compilation units. Set this to zero to disable caching. Cache
694 sizes of up to at least twenty will improve startup time for
695 typical inter-CU-reference binaries, at an obvious memory cost. */
696 static int dwarf2_max_cache_age = 5;
698 show_dwarf2_max_cache_age (struct ui_file *file, int from_tty,
699 struct cmd_list_element *c, const char *value)
701 fprintf_filtered (file, _("\
702 The upper bound on the age of cached dwarf2 compilation units is %s.\n"),
707 /* Various complaints about symbol reading that don't abort the process */
710 dwarf2_statement_list_fits_in_line_number_section_complaint (void)
712 complaint (&symfile_complaints,
713 _("statement list doesn't fit in .debug_line section"));
717 dwarf2_debug_line_missing_file_complaint (void)
719 complaint (&symfile_complaints,
720 _(".debug_line section has line data without a file"));
724 dwarf2_debug_line_missing_end_sequence_complaint (void)
726 complaint (&symfile_complaints,
727 _(".debug_line section has line program sequence without an end"));
731 dwarf2_complex_location_expr_complaint (void)
733 complaint (&symfile_complaints, _("location expression too complex"));
737 dwarf2_const_value_length_mismatch_complaint (const char *arg1, int arg2,
740 complaint (&symfile_complaints,
741 _("const value length mismatch for '%s', got %d, expected %d"), arg1,
746 dwarf2_macros_too_long_complaint (void)
748 complaint (&symfile_complaints,
749 _("macro info runs off end of `.debug_macinfo' section"));
753 dwarf2_macro_malformed_definition_complaint (const char *arg1)
755 complaint (&symfile_complaints,
756 _("macro debug info contains a malformed macro definition:\n`%s'"),
761 dwarf2_invalid_attrib_class_complaint (const char *arg1, const char *arg2)
763 complaint (&symfile_complaints,
764 _("invalid attribute class or form for '%s' in '%s'"), arg1, arg2);
767 /* local function prototypes */
769 static void dwarf2_locate_sections (bfd *, asection *, void *);
772 static void dwarf2_build_psymtabs_easy (struct objfile *);
775 static void dwarf2_create_include_psymtab (char *, struct partial_symtab *,
778 static void dwarf2_build_include_psymtabs (struct dwarf2_cu *,
780 struct partial_symtab *);
782 static void dwarf2_build_psymtabs_hard (struct objfile *);
784 static void scan_partial_symbols (struct partial_die_info *,
785 CORE_ADDR *, CORE_ADDR *,
786 int, struct dwarf2_cu *);
788 static void add_partial_symbol (struct partial_die_info *,
791 static int pdi_needs_namespace (enum dwarf_tag tag);
793 static void add_partial_namespace (struct partial_die_info *pdi,
794 CORE_ADDR *lowpc, CORE_ADDR *highpc,
795 int need_pc, struct dwarf2_cu *cu);
797 static void add_partial_module (struct partial_die_info *pdi, CORE_ADDR *lowpc,
798 CORE_ADDR *highpc, int need_pc,
799 struct dwarf2_cu *cu);
801 static void add_partial_enumeration (struct partial_die_info *enum_pdi,
802 struct dwarf2_cu *cu);
804 static void add_partial_subprogram (struct partial_die_info *pdi,
805 CORE_ADDR *lowpc, CORE_ADDR *highpc,
806 int need_pc, struct dwarf2_cu *cu);
808 static gdb_byte *locate_pdi_sibling (struct partial_die_info *orig_pdi,
809 gdb_byte *buffer, gdb_byte *info_ptr,
810 bfd *abfd, struct dwarf2_cu *cu);
812 static void dwarf2_psymtab_to_symtab (struct partial_symtab *);
814 static void psymtab_to_symtab_1 (struct partial_symtab *);
816 static void dwarf2_read_abbrevs (bfd *abfd, struct dwarf2_cu *cu);
818 static void dwarf2_free_abbrev_table (void *);
820 static struct abbrev_info *peek_die_abbrev (gdb_byte *, unsigned int *,
823 static struct abbrev_info *dwarf2_lookup_abbrev (unsigned int,
826 static struct partial_die_info *load_partial_dies (bfd *,
827 gdb_byte *, gdb_byte *,
828 int, struct dwarf2_cu *);
830 static gdb_byte *read_partial_die (struct partial_die_info *,
831 struct abbrev_info *abbrev,
833 gdb_byte *, gdb_byte *,
836 static struct partial_die_info *find_partial_die (unsigned int,
839 static void fixup_partial_die (struct partial_die_info *,
842 static gdb_byte *read_attribute (struct attribute *, struct attr_abbrev *,
843 bfd *, gdb_byte *, struct dwarf2_cu *);
845 static gdb_byte *read_attribute_value (struct attribute *, unsigned,
846 bfd *, gdb_byte *, struct dwarf2_cu *);
848 static unsigned int read_1_byte (bfd *, gdb_byte *);
850 static int read_1_signed_byte (bfd *, gdb_byte *);
852 static unsigned int read_2_bytes (bfd *, gdb_byte *);
854 static unsigned int read_4_bytes (bfd *, gdb_byte *);
856 static ULONGEST read_8_bytes (bfd *, gdb_byte *);
858 static CORE_ADDR read_address (bfd *, gdb_byte *ptr, struct dwarf2_cu *,
861 static LONGEST read_initial_length (bfd *, gdb_byte *, unsigned int *);
863 static LONGEST read_checked_initial_length_and_offset
864 (bfd *, gdb_byte *, const struct comp_unit_head *,
865 unsigned int *, unsigned int *);
867 static LONGEST read_offset (bfd *, gdb_byte *, const struct comp_unit_head *,
870 static LONGEST read_offset_1 (bfd *, gdb_byte *, unsigned int);
872 static gdb_byte *read_n_bytes (bfd *, gdb_byte *, unsigned int);
874 static char *read_string (bfd *, gdb_byte *, unsigned int *);
876 static char *read_indirect_string (bfd *, gdb_byte *,
877 const struct comp_unit_head *,
880 static unsigned long read_unsigned_leb128 (bfd *, gdb_byte *, unsigned int *);
882 static long read_signed_leb128 (bfd *, gdb_byte *, unsigned int *);
884 static gdb_byte *skip_leb128 (bfd *, gdb_byte *);
886 static void set_cu_language (unsigned int, struct dwarf2_cu *);
888 static struct attribute *dwarf2_attr (struct die_info *, unsigned int,
891 static struct attribute *dwarf2_attr_no_follow (struct die_info *,
895 static int dwarf2_flag_true_p (struct die_info *die, unsigned name,
896 struct dwarf2_cu *cu);
898 static int die_is_declaration (struct die_info *, struct dwarf2_cu *cu);
900 static struct die_info *die_specification (struct die_info *die,
901 struct dwarf2_cu **);
903 static void free_line_header (struct line_header *lh);
905 static void add_file_name (struct line_header *, char *, unsigned int,
906 unsigned int, unsigned int);
908 static struct line_header *(dwarf_decode_line_header
909 (unsigned int offset,
910 bfd *abfd, struct dwarf2_cu *cu));
912 static void dwarf_decode_lines (struct line_header *, char *, bfd *,
913 struct dwarf2_cu *, struct partial_symtab *);
915 static void dwarf2_start_subfile (char *, char *, char *);
917 static struct symbol *new_symbol (struct die_info *, struct type *,
920 static void dwarf2_const_value (struct attribute *, struct symbol *,
923 static void dwarf2_const_value_data (struct attribute *attr,
927 static struct type *die_type (struct die_info *, struct dwarf2_cu *);
929 static int need_gnat_info (struct dwarf2_cu *);
931 static struct type *die_descriptive_type (struct die_info *, struct dwarf2_cu *);
933 static void set_descriptive_type (struct type *, struct die_info *,
936 static struct type *die_containing_type (struct die_info *,
939 static struct type *tag_type_to_type (struct die_info *, struct dwarf2_cu *);
941 static struct type *read_type_die (struct die_info *, struct dwarf2_cu *);
943 static char *determine_prefix (struct die_info *die, struct dwarf2_cu *);
945 static char *typename_concat (struct obstack *,
950 static void read_file_scope (struct die_info *, struct dwarf2_cu *);
952 static void read_type_unit_scope (struct die_info *, struct dwarf2_cu *);
954 static void read_func_scope (struct die_info *, struct dwarf2_cu *);
956 static void read_lexical_block_scope (struct die_info *, struct dwarf2_cu *);
958 static int dwarf2_ranges_read (unsigned, CORE_ADDR *, CORE_ADDR *,
959 struct dwarf2_cu *, struct partial_symtab *);
961 static int dwarf2_get_pc_bounds (struct die_info *,
962 CORE_ADDR *, CORE_ADDR *, struct dwarf2_cu *,
963 struct partial_symtab *);
965 static void get_scope_pc_bounds (struct die_info *,
966 CORE_ADDR *, CORE_ADDR *,
969 static void dwarf2_record_block_ranges (struct die_info *, struct block *,
970 CORE_ADDR, struct dwarf2_cu *);
972 static void dwarf2_add_field (struct field_info *, struct die_info *,
975 static void dwarf2_attach_fields_to_type (struct field_info *,
976 struct type *, struct dwarf2_cu *);
978 static void dwarf2_add_member_fn (struct field_info *,
979 struct die_info *, struct type *,
982 static void dwarf2_attach_fn_fields_to_type (struct field_info *,
983 struct type *, struct dwarf2_cu *);
985 static void process_structure_scope (struct die_info *, struct dwarf2_cu *);
987 static const char *determine_class_name (struct die_info *die,
988 struct dwarf2_cu *cu);
990 static void read_common_block (struct die_info *, struct dwarf2_cu *);
992 static void read_namespace (struct die_info *die, struct dwarf2_cu *);
994 static void read_module (struct die_info *die, struct dwarf2_cu *cu);
996 static void read_import_statement (struct die_info *die, struct dwarf2_cu *);
998 static const char *namespace_name (struct die_info *die,
999 int *is_anonymous, struct dwarf2_cu *);
1001 static void process_enumeration_scope (struct die_info *, struct dwarf2_cu *);
1003 static CORE_ADDR decode_locdesc (struct dwarf_block *, struct dwarf2_cu *);
1005 static enum dwarf_array_dim_ordering read_array_order (struct die_info *,
1006 struct dwarf2_cu *);
1008 static struct die_info *read_comp_unit (gdb_byte *, struct dwarf2_cu *);
1010 static struct die_info *read_die_and_children_1 (const struct die_reader_specs *reader,
1012 gdb_byte **new_info_ptr,
1013 struct die_info *parent);
1015 static struct die_info *read_die_and_children (const struct die_reader_specs *reader,
1017 gdb_byte **new_info_ptr,
1018 struct die_info *parent);
1020 static struct die_info *read_die_and_siblings (const struct die_reader_specs *reader,
1022 gdb_byte **new_info_ptr,
1023 struct die_info *parent);
1025 static gdb_byte *read_full_die (const struct die_reader_specs *reader,
1026 struct die_info **, gdb_byte *,
1029 static void process_die (struct die_info *, struct dwarf2_cu *);
1031 static char *dwarf2_linkage_name (struct die_info *, struct dwarf2_cu *);
1033 static char *dwarf2_canonicalize_name (char *, struct dwarf2_cu *,
1036 static char *dwarf2_name (struct die_info *die, struct dwarf2_cu *);
1038 static struct die_info *dwarf2_extension (struct die_info *die,
1039 struct dwarf2_cu **);
1041 static char *dwarf_tag_name (unsigned int);
1043 static char *dwarf_attr_name (unsigned int);
1045 static char *dwarf_form_name (unsigned int);
1047 static char *dwarf_stack_op_name (unsigned int);
1049 static char *dwarf_bool_name (unsigned int);
1051 static char *dwarf_type_encoding_name (unsigned int);
1054 static char *dwarf_cfi_name (unsigned int);
1057 static struct die_info *sibling_die (struct die_info *);
1059 static void dump_die_shallow (struct ui_file *, int indent, struct die_info *);
1061 static void dump_die_for_error (struct die_info *);
1063 static void dump_die_1 (struct ui_file *, int level, int max_level,
1066 /*static*/ void dump_die (struct die_info *, int max_level);
1068 static void store_in_ref_table (struct die_info *,
1069 struct dwarf2_cu *);
1071 static int is_ref_attr (struct attribute *);
1073 static unsigned int dwarf2_get_ref_die_offset (struct attribute *);
1075 static LONGEST dwarf2_get_attr_constant_value (struct attribute *, int);
1077 static struct die_info *follow_die_ref_or_sig (struct die_info *,
1079 struct dwarf2_cu **);
1081 static struct die_info *follow_die_ref (struct die_info *,
1083 struct dwarf2_cu **);
1085 static struct die_info *follow_die_sig (struct die_info *,
1087 struct dwarf2_cu **);
1089 static void read_signatured_type_at_offset (struct objfile *objfile,
1090 unsigned int offset);
1092 static void read_signatured_type (struct objfile *,
1093 struct signatured_type *type_sig);
1095 /* memory allocation interface */
1097 static struct dwarf_block *dwarf_alloc_block (struct dwarf2_cu *);
1099 static struct abbrev_info *dwarf_alloc_abbrev (struct dwarf2_cu *);
1101 static struct die_info *dwarf_alloc_die (struct dwarf2_cu *, int);
1103 static void initialize_cu_func_list (struct dwarf2_cu *);
1105 static void add_to_cu_func_list (const char *, CORE_ADDR, CORE_ADDR,
1106 struct dwarf2_cu *);
1108 static void dwarf_decode_macros (struct line_header *, unsigned int,
1109 char *, bfd *, struct dwarf2_cu *);
1111 static int attr_form_is_block (struct attribute *);
1113 static int attr_form_is_section_offset (struct attribute *);
1115 static int attr_form_is_constant (struct attribute *);
1117 static void dwarf2_symbol_mark_computed (struct attribute *attr,
1119 struct dwarf2_cu *cu);
1121 static gdb_byte *skip_one_die (gdb_byte *buffer, gdb_byte *info_ptr,
1122 struct abbrev_info *abbrev,
1123 struct dwarf2_cu *cu);
1125 static void free_stack_comp_unit (void *);
1127 static hashval_t partial_die_hash (const void *item);
1129 static int partial_die_eq (const void *item_lhs, const void *item_rhs);
1131 static struct dwarf2_per_cu_data *dwarf2_find_containing_comp_unit
1132 (unsigned int offset, struct objfile *objfile);
1134 static struct dwarf2_per_cu_data *dwarf2_find_comp_unit
1135 (unsigned int offset, struct objfile *objfile);
1137 static struct dwarf2_cu *alloc_one_comp_unit (struct objfile *objfile);
1139 static void free_one_comp_unit (void *);
1141 static void free_cached_comp_units (void *);
1143 static void age_cached_comp_units (void);
1145 static void free_one_cached_comp_unit (void *);
1147 static struct type *set_die_type (struct die_info *, struct type *,
1148 struct dwarf2_cu *);
1150 static void create_all_comp_units (struct objfile *);
1152 static void load_full_comp_unit (struct dwarf2_per_cu_data *,
1155 static void process_full_comp_unit (struct dwarf2_per_cu_data *);
1157 static void dwarf2_add_dependence (struct dwarf2_cu *,
1158 struct dwarf2_per_cu_data *);
1160 static void dwarf2_mark (struct dwarf2_cu *);
1162 static void dwarf2_clear_marks (struct dwarf2_per_cu_data *);
1164 static struct type *get_die_type (struct die_info *die, struct dwarf2_cu *cu);
1166 /* Try to locate the sections we need for DWARF 2 debugging
1167 information and return true if we have enough to do something. */
1170 dwarf2_has_info (struct objfile *objfile)
1172 struct dwarf2_per_objfile *data;
1174 /* Initialize per-objfile state. */
1175 data = obstack_alloc (&objfile->objfile_obstack, sizeof (*data));
1176 memset (data, 0, sizeof (*data));
1177 set_objfile_data (objfile, dwarf2_objfile_data_key, data);
1178 dwarf2_per_objfile = data;
1180 bfd_map_over_sections (objfile->obfd, dwarf2_locate_sections, NULL);
1181 return (data->info.asection != NULL && data->abbrev.asection != NULL);
1184 /* When loading sections, we can either look for ".<name>", or for
1185 * ".z<name>", which indicates a compressed section. */
1188 section_is_p (const char *section_name, const char *name)
1190 return (section_name[0] == '.'
1191 && (strcmp (section_name + 1, name) == 0
1192 || (section_name[1] == 'z'
1193 && strcmp (section_name + 2, name) == 0)));
1196 /* This function is mapped across the sections and remembers the
1197 offset and size of each of the debugging sections we are interested
1201 dwarf2_locate_sections (bfd *abfd, asection *sectp, void *ignore_ptr)
1203 if (section_is_p (sectp->name, INFO_SECTION))
1205 dwarf2_per_objfile->info.asection = sectp;
1206 dwarf2_per_objfile->info.size = bfd_get_section_size (sectp);
1208 else if (section_is_p (sectp->name, ABBREV_SECTION))
1210 dwarf2_per_objfile->abbrev.asection = sectp;
1211 dwarf2_per_objfile->abbrev.size = bfd_get_section_size (sectp);
1213 else if (section_is_p (sectp->name, LINE_SECTION))
1215 dwarf2_per_objfile->line.asection = sectp;
1216 dwarf2_per_objfile->line.size = bfd_get_section_size (sectp);
1218 else if (section_is_p (sectp->name, PUBNAMES_SECTION))
1220 dwarf2_per_objfile->pubnames.asection = sectp;
1221 dwarf2_per_objfile->pubnames.size = bfd_get_section_size (sectp);
1223 else if (section_is_p (sectp->name, ARANGES_SECTION))
1225 dwarf2_per_objfile->aranges.asection = sectp;
1226 dwarf2_per_objfile->aranges.size = bfd_get_section_size (sectp);
1228 else if (section_is_p (sectp->name, LOC_SECTION))
1230 dwarf2_per_objfile->loc.asection = sectp;
1231 dwarf2_per_objfile->loc.size = bfd_get_section_size (sectp);
1233 else if (section_is_p (sectp->name, MACINFO_SECTION))
1235 dwarf2_per_objfile->macinfo.asection = sectp;
1236 dwarf2_per_objfile->macinfo.size = bfd_get_section_size (sectp);
1238 else if (section_is_p (sectp->name, STR_SECTION))
1240 dwarf2_per_objfile->str.asection = sectp;
1241 dwarf2_per_objfile->str.size = bfd_get_section_size (sectp);
1243 else if (section_is_p (sectp->name, FRAME_SECTION))
1245 dwarf2_per_objfile->frame.asection = sectp;
1246 dwarf2_per_objfile->frame.size = bfd_get_section_size (sectp);
1248 else if (section_is_p (sectp->name, EH_FRAME_SECTION))
1250 flagword aflag = bfd_get_section_flags (ignore_abfd, sectp);
1251 if (aflag & SEC_HAS_CONTENTS)
1253 dwarf2_per_objfile->eh_frame.asection = sectp;
1254 dwarf2_per_objfile->eh_frame.size = bfd_get_section_size (sectp);
1257 else if (section_is_p (sectp->name, RANGES_SECTION))
1259 dwarf2_per_objfile->ranges.asection = sectp;
1260 dwarf2_per_objfile->ranges.size = bfd_get_section_size (sectp);
1262 else if (section_is_p (sectp->name, TYPES_SECTION))
1264 dwarf2_per_objfile->types.asection = sectp;
1265 dwarf2_per_objfile->types.size = bfd_get_section_size (sectp);
1268 if ((bfd_get_section_flags (abfd, sectp) & SEC_LOAD)
1269 && bfd_section_vma (abfd, sectp) == 0)
1270 dwarf2_per_objfile->has_section_at_zero = 1;
1273 /* Decompress a section that was compressed using zlib. Store the
1274 decompressed buffer, and its size, in OUTBUF and OUTSIZE. */
1277 zlib_decompress_section (struct objfile *objfile, asection *sectp,
1278 gdb_byte **outbuf, bfd_size_type *outsize)
1280 bfd *abfd = objfile->obfd;
1282 error (_("Support for zlib-compressed DWARF data (from '%s') "
1283 "is disabled in this copy of GDB"),
1284 bfd_get_filename (abfd));
1286 bfd_size_type compressed_size = bfd_get_section_size (sectp);
1287 gdb_byte *compressed_buffer = xmalloc (compressed_size);
1288 struct cleanup *cleanup = make_cleanup (xfree, compressed_buffer);
1289 bfd_size_type uncompressed_size;
1290 gdb_byte *uncompressed_buffer;
1293 int header_size = 12;
1295 if (bfd_seek (abfd, sectp->filepos, SEEK_SET) != 0
1296 || bfd_bread (compressed_buffer, compressed_size, abfd) != compressed_size)
1297 error (_("Dwarf Error: Can't read DWARF data from '%s'"),
1298 bfd_get_filename (abfd));
1300 /* Read the zlib header. In this case, it should be "ZLIB" followed
1301 by the uncompressed section size, 8 bytes in big-endian order. */
1302 if (compressed_size < header_size
1303 || strncmp (compressed_buffer, "ZLIB", 4) != 0)
1304 error (_("Dwarf Error: Corrupt DWARF ZLIB header from '%s'"),
1305 bfd_get_filename (abfd));
1306 uncompressed_size = compressed_buffer[4]; uncompressed_size <<= 8;
1307 uncompressed_size += compressed_buffer[5]; uncompressed_size <<= 8;
1308 uncompressed_size += compressed_buffer[6]; uncompressed_size <<= 8;
1309 uncompressed_size += compressed_buffer[7]; uncompressed_size <<= 8;
1310 uncompressed_size += compressed_buffer[8]; uncompressed_size <<= 8;
1311 uncompressed_size += compressed_buffer[9]; uncompressed_size <<= 8;
1312 uncompressed_size += compressed_buffer[10]; uncompressed_size <<= 8;
1313 uncompressed_size += compressed_buffer[11];
1315 /* It is possible the section consists of several compressed
1316 buffers concatenated together, so we uncompress in a loop. */
1320 strm.avail_in = compressed_size - header_size;
1321 strm.next_in = (Bytef*) compressed_buffer + header_size;
1322 strm.avail_out = uncompressed_size;
1323 uncompressed_buffer = obstack_alloc (&objfile->objfile_obstack,
1325 rc = inflateInit (&strm);
1326 while (strm.avail_in > 0)
1329 error (_("Dwarf Error: setting up DWARF uncompression in '%s': %d"),
1330 bfd_get_filename (abfd), rc);
1331 strm.next_out = ((Bytef*) uncompressed_buffer
1332 + (uncompressed_size - strm.avail_out));
1333 rc = inflate (&strm, Z_FINISH);
1334 if (rc != Z_STREAM_END)
1335 error (_("Dwarf Error: zlib error uncompressing from '%s': %d"),
1336 bfd_get_filename (abfd), rc);
1337 rc = inflateReset (&strm);
1339 rc = inflateEnd (&strm);
1341 || strm.avail_out != 0)
1342 error (_("Dwarf Error: concluding DWARF uncompression in '%s': %d"),
1343 bfd_get_filename (abfd), rc);
1345 do_cleanups (cleanup);
1346 *outbuf = uncompressed_buffer;
1347 *outsize = uncompressed_size;
1351 /* Read the contents of the section SECTP from object file specified by
1352 OBJFILE, store info about the section into INFO.
1353 If the section is compressed, uncompress it before returning. */
1356 dwarf2_read_section (struct objfile *objfile, struct dwarf2_section_info *info)
1358 bfd *abfd = objfile->obfd;
1359 asection *sectp = info->asection;
1360 gdb_byte *buf, *retbuf;
1361 unsigned char header[4];
1363 info->buffer = NULL;
1364 info->was_mmapped = 0;
1366 if (info->asection == NULL || info->size == 0)
1369 /* Check if the file has a 4-byte header indicating compression. */
1370 if (info->size > sizeof (header)
1371 && bfd_seek (abfd, sectp->filepos, SEEK_SET) == 0
1372 && bfd_bread (header, sizeof (header), abfd) == sizeof (header))
1374 /* Upon decompression, update the buffer and its size. */
1375 if (strncmp (header, "ZLIB", sizeof (header)) == 0)
1377 zlib_decompress_section (objfile, sectp, &info->buffer,
1385 pagesize = getpagesize ();
1387 /* Only try to mmap sections which are large enough: we don't want to
1388 waste space due to fragmentation. Also, only try mmap for sections
1389 without relocations. */
1391 if (info->size > 4 * pagesize && (sectp->flags & SEC_RELOC) == 0)
1393 off_t pg_offset = sectp->filepos & ~(pagesize - 1);
1394 size_t map_length = info->size + sectp->filepos - pg_offset;
1395 caddr_t retbuf = bfd_mmap (abfd, 0, map_length, PROT_READ,
1396 MAP_PRIVATE, pg_offset);
1398 if (retbuf != MAP_FAILED)
1400 info->was_mmapped = 1;
1401 info->buffer = retbuf + (sectp->filepos & (pagesize - 1)) ;
1407 /* If we get here, we are a normal, not-compressed section. */
1409 = obstack_alloc (&objfile->objfile_obstack, info->size);
1411 /* When debugging .o files, we may need to apply relocations; see
1412 http://sourceware.org/ml/gdb-patches/2002-04/msg00136.html .
1413 We never compress sections in .o files, so we only need to
1414 try this when the section is not compressed. */
1415 retbuf = symfile_relocate_debug_section (abfd, sectp, buf);
1418 info->buffer = retbuf;
1422 if (bfd_seek (abfd, sectp->filepos, SEEK_SET) != 0
1423 || bfd_bread (buf, info->size, abfd) != info->size)
1424 error (_("Dwarf Error: Can't read DWARF data from '%s'"),
1425 bfd_get_filename (abfd));
1428 /* Fill in SECTP, BUFP and SIZEP with section info, given OBJFILE and
1432 dwarf2_get_section_info (struct objfile *objfile, const char *section_name,
1433 asection **sectp, gdb_byte **bufp,
1434 bfd_size_type *sizep)
1436 struct dwarf2_per_objfile *data
1437 = objfile_data (objfile, dwarf2_objfile_data_key);
1438 struct dwarf2_section_info *info;
1439 if (section_is_p (section_name, EH_FRAME_SECTION))
1440 info = &data->eh_frame;
1441 else if (section_is_p (section_name, FRAME_SECTION))
1442 info = &data->frame;
1446 if (info->asection != NULL && info->size != 0 && info->buffer == NULL)
1447 /* We haven't read this section in yet. Do it now. */
1448 dwarf2_read_section (objfile, info);
1450 *sectp = info->asection;
1451 *bufp = info->buffer;
1452 *sizep = info->size;
1455 /* Build a partial symbol table. */
1458 dwarf2_build_psymtabs (struct objfile *objfile)
1460 dwarf2_read_section (objfile, &dwarf2_per_objfile->info);
1461 dwarf2_read_section (objfile, &dwarf2_per_objfile->abbrev);
1462 dwarf2_read_section (objfile, &dwarf2_per_objfile->line);
1463 dwarf2_read_section (objfile, &dwarf2_per_objfile->str);
1464 dwarf2_read_section (objfile, &dwarf2_per_objfile->macinfo);
1465 dwarf2_read_section (objfile, &dwarf2_per_objfile->ranges);
1466 dwarf2_read_section (objfile, &dwarf2_per_objfile->types);
1467 dwarf2_read_section (objfile, &dwarf2_per_objfile->loc);
1468 dwarf2_read_section (objfile, &dwarf2_per_objfile->eh_frame);
1469 dwarf2_read_section (objfile, &dwarf2_per_objfile->frame);
1471 if (objfile->global_psymbols.size == 0 && objfile->static_psymbols.size == 0)
1473 init_psymbol_list (objfile, 1024);
1477 if (dwarf_aranges_offset && dwarf_pubnames_offset)
1479 /* Things are significantly easier if we have .debug_aranges and
1480 .debug_pubnames sections */
1482 dwarf2_build_psymtabs_easy (objfile);
1486 /* only test this case for now */
1488 /* In this case we have to work a bit harder */
1489 dwarf2_build_psymtabs_hard (objfile);
1494 /* Build the partial symbol table from the information in the
1495 .debug_pubnames and .debug_aranges sections. */
1498 dwarf2_build_psymtabs_easy (struct objfile *objfile)
1500 bfd *abfd = objfile->obfd;
1501 char *aranges_buffer, *pubnames_buffer;
1502 char *aranges_ptr, *pubnames_ptr;
1503 unsigned int entry_length, version, info_offset, info_size;
1505 pubnames_buffer = dwarf2_read_section (objfile,
1506 dwarf_pubnames_section);
1507 pubnames_ptr = pubnames_buffer;
1508 while ((pubnames_ptr - pubnames_buffer) < dwarf2_per_objfile->pubnames.size)
1510 unsigned int bytes_read;
1512 entry_length = read_initial_length (abfd, pubnames_ptr, &bytes_read);
1513 pubnames_ptr += bytes_read;
1514 version = read_1_byte (abfd, pubnames_ptr);
1516 info_offset = read_4_bytes (abfd, pubnames_ptr);
1518 info_size = read_4_bytes (abfd, pubnames_ptr);
1522 aranges_buffer = dwarf2_read_section (objfile,
1523 dwarf_aranges_section);
1528 /* Return TRUE if OFFSET is within CU_HEADER. */
1531 offset_in_cu_p (const struct comp_unit_head *cu_header, unsigned int offset)
1533 unsigned int bottom = cu_header->offset;
1534 unsigned int top = (cu_header->offset
1536 + cu_header->initial_length_size);
1537 return (offset >= bottom && offset < top);
1540 /* Read in the comp unit header information from the debug_info at info_ptr.
1541 NOTE: This leaves members offset, first_die_offset to be filled in
1545 read_comp_unit_head (struct comp_unit_head *cu_header,
1546 gdb_byte *info_ptr, bfd *abfd)
1549 unsigned int bytes_read;
1551 cu_header->length = read_initial_length (abfd, info_ptr, &bytes_read);
1552 cu_header->initial_length_size = bytes_read;
1553 cu_header->offset_size = (bytes_read == 4) ? 4 : 8;
1554 info_ptr += bytes_read;
1555 cu_header->version = read_2_bytes (abfd, info_ptr);
1557 cu_header->abbrev_offset = read_offset (abfd, info_ptr, cu_header,
1559 info_ptr += bytes_read;
1560 cu_header->addr_size = read_1_byte (abfd, info_ptr);
1562 signed_addr = bfd_get_sign_extend_vma (abfd);
1563 if (signed_addr < 0)
1564 internal_error (__FILE__, __LINE__,
1565 _("read_comp_unit_head: dwarf from non elf file"));
1566 cu_header->signed_addr_p = signed_addr;
1572 partial_read_comp_unit_head (struct comp_unit_head *header, gdb_byte *info_ptr,
1573 gdb_byte *buffer, unsigned int buffer_size,
1576 gdb_byte *beg_of_comp_unit = info_ptr;
1578 info_ptr = read_comp_unit_head (header, info_ptr, abfd);
1580 if (header->version != 2 && header->version != 3)
1581 error (_("Dwarf Error: wrong version in compilation unit header "
1582 "(is %d, should be %d) [in module %s]"), header->version,
1583 2, bfd_get_filename (abfd));
1585 if (header->abbrev_offset >= dwarf2_per_objfile->abbrev.size)
1586 error (_("Dwarf Error: bad offset (0x%lx) in compilation unit header "
1587 "(offset 0x%lx + 6) [in module %s]"),
1588 (long) header->abbrev_offset,
1589 (long) (beg_of_comp_unit - buffer),
1590 bfd_get_filename (abfd));
1592 if (beg_of_comp_unit + header->length + header->initial_length_size
1593 > buffer + buffer_size)
1594 error (_("Dwarf Error: bad length (0x%lx) in compilation unit header "
1595 "(offset 0x%lx + 0) [in module %s]"),
1596 (long) header->length,
1597 (long) (beg_of_comp_unit - buffer),
1598 bfd_get_filename (abfd));
1603 /* Read in the types comp unit header information from .debug_types entry at
1604 types_ptr. The result is a pointer to one past the end of the header. */
1607 read_type_comp_unit_head (struct comp_unit_head *cu_header,
1608 ULONGEST *signature,
1609 gdb_byte *types_ptr, bfd *abfd)
1611 unsigned int bytes_read;
1612 gdb_byte *initial_types_ptr = types_ptr;
1614 cu_header->offset = types_ptr - dwarf2_per_objfile->types.buffer;
1616 types_ptr = read_comp_unit_head (cu_header, types_ptr, abfd);
1618 *signature = read_8_bytes (abfd, types_ptr);
1620 types_ptr += cu_header->offset_size;
1621 cu_header->first_die_offset = types_ptr - initial_types_ptr;
1626 /* Allocate a new partial symtab for file named NAME and mark this new
1627 partial symtab as being an include of PST. */
1630 dwarf2_create_include_psymtab (char *name, struct partial_symtab *pst,
1631 struct objfile *objfile)
1633 struct partial_symtab *subpst = allocate_psymtab (name, objfile);
1635 subpst->section_offsets = pst->section_offsets;
1636 subpst->textlow = 0;
1637 subpst->texthigh = 0;
1639 subpst->dependencies = (struct partial_symtab **)
1640 obstack_alloc (&objfile->objfile_obstack,
1641 sizeof (struct partial_symtab *));
1642 subpst->dependencies[0] = pst;
1643 subpst->number_of_dependencies = 1;
1645 subpst->globals_offset = 0;
1646 subpst->n_global_syms = 0;
1647 subpst->statics_offset = 0;
1648 subpst->n_static_syms = 0;
1649 subpst->symtab = NULL;
1650 subpst->read_symtab = pst->read_symtab;
1653 /* No private part is necessary for include psymtabs. This property
1654 can be used to differentiate between such include psymtabs and
1655 the regular ones. */
1656 subpst->read_symtab_private = NULL;
1659 /* Read the Line Number Program data and extract the list of files
1660 included by the source file represented by PST. Build an include
1661 partial symtab for each of these included files. */
1664 dwarf2_build_include_psymtabs (struct dwarf2_cu *cu,
1665 struct die_info *die,
1666 struct partial_symtab *pst)
1668 struct objfile *objfile = cu->objfile;
1669 bfd *abfd = objfile->obfd;
1670 struct line_header *lh = NULL;
1671 struct attribute *attr;
1673 attr = dwarf2_attr (die, DW_AT_stmt_list, cu);
1676 unsigned int line_offset = DW_UNSND (attr);
1677 lh = dwarf_decode_line_header (line_offset, abfd, cu);
1680 return; /* No linetable, so no includes. */
1682 dwarf_decode_lines (lh, NULL, abfd, cu, pst);
1684 free_line_header (lh);
1688 hash_type_signature (const void *item)
1690 const struct signatured_type *type_sig = item;
1691 /* This drops the top 32 bits of the signature, but is ok for a hash. */
1692 return type_sig->signature;
1696 eq_type_signature (const void *item_lhs, const void *item_rhs)
1698 const struct signatured_type *lhs = item_lhs;
1699 const struct signatured_type *rhs = item_rhs;
1700 return lhs->signature == rhs->signature;
1703 /* Create the hash table of all entries in the .debug_types section.
1704 The result is zero if there is an error (e.g. missing .debug_types section),
1705 otherwise non-zero. */
1708 create_debug_types_hash_table (struct objfile *objfile)
1710 gdb_byte *info_ptr = dwarf2_per_objfile->types.buffer;
1713 if (info_ptr == NULL)
1715 dwarf2_per_objfile->signatured_types = NULL;
1719 types_htab = htab_create_alloc_ex (41,
1720 hash_type_signature,
1723 &objfile->objfile_obstack,
1724 hashtab_obstack_allocate,
1725 dummy_obstack_deallocate);
1727 if (dwarf2_die_debug)
1728 fprintf_unfiltered (gdb_stdlog, "Signatured types:\n");
1730 while (info_ptr < dwarf2_per_objfile->types.buffer + dwarf2_per_objfile->types.size)
1732 unsigned int offset;
1733 unsigned int offset_size;
1734 unsigned int type_offset;
1735 unsigned int length, initial_length_size;
1736 unsigned short version;
1738 struct signatured_type *type_sig;
1740 gdb_byte *ptr = info_ptr;
1742 offset = ptr - dwarf2_per_objfile->types.buffer;
1744 /* We need to read the type's signature in order to build the hash
1745 table, but we don't need to read anything else just yet. */
1747 /* Sanity check to ensure entire cu is present. */
1748 length = read_initial_length (objfile->obfd, ptr, &initial_length_size);
1749 if (ptr + length + initial_length_size
1750 > dwarf2_per_objfile->types.buffer + dwarf2_per_objfile->types.size)
1752 complaint (&symfile_complaints,
1753 _("debug type entry runs off end of `.debug_types' section, ignored"));
1757 offset_size = initial_length_size == 4 ? 4 : 8;
1758 ptr += initial_length_size;
1759 version = bfd_get_16 (objfile->obfd, ptr);
1761 ptr += offset_size; /* abbrev offset */
1762 ptr += 1; /* address size */
1763 signature = bfd_get_64 (objfile->obfd, ptr);
1765 type_offset = read_offset_1 (objfile->obfd, ptr, offset_size);
1767 type_sig = obstack_alloc (&objfile->objfile_obstack, sizeof (*type_sig));
1768 memset (type_sig, 0, sizeof (*type_sig));
1769 type_sig->signature = signature;
1770 type_sig->offset = offset;
1771 type_sig->type_offset = type_offset;
1773 slot = htab_find_slot (types_htab, type_sig, INSERT);
1774 gdb_assert (slot != NULL);
1777 if (dwarf2_die_debug)
1778 fprintf_unfiltered (gdb_stdlog, " offset 0x%x, signature 0x%s\n",
1779 offset, phex (signature, sizeof (signature)));
1781 info_ptr = info_ptr + initial_length_size + length;
1784 dwarf2_per_objfile->signatured_types = types_htab;
1789 /* Lookup a signature based type.
1790 Returns NULL if SIG is not present in the table. */
1792 static struct signatured_type *
1793 lookup_signatured_type (struct objfile *objfile, ULONGEST sig)
1795 struct signatured_type find_entry, *entry;
1797 if (dwarf2_per_objfile->signatured_types == NULL)
1799 complaint (&symfile_complaints,
1800 _("missing `.debug_types' section for DW_FORM_sig8 die"));
1804 find_entry.signature = sig;
1805 entry = htab_find (dwarf2_per_objfile->signatured_types, &find_entry);
1809 /* Initialize a die_reader_specs struct from a dwarf2_cu struct. */
1812 init_cu_die_reader (struct die_reader_specs *reader,
1813 struct dwarf2_cu *cu)
1815 reader->abfd = cu->objfile->obfd;
1817 if (cu->per_cu->from_debug_types)
1818 reader->buffer = dwarf2_per_objfile->types.buffer;
1820 reader->buffer = dwarf2_per_objfile->info.buffer;
1823 /* Find the base address of the compilation unit for range lists and
1824 location lists. It will normally be specified by DW_AT_low_pc.
1825 In DWARF-3 draft 4, the base address could be overridden by
1826 DW_AT_entry_pc. It's been removed, but GCC still uses this for
1827 compilation units with discontinuous ranges. */
1830 dwarf2_find_base_address (struct die_info *die, struct dwarf2_cu *cu)
1832 struct attribute *attr;
1835 cu->base_address = 0;
1837 attr = dwarf2_attr (die, DW_AT_entry_pc, cu);
1840 cu->base_address = DW_ADDR (attr);
1845 attr = dwarf2_attr (die, DW_AT_low_pc, cu);
1848 cu->base_address = DW_ADDR (attr);
1854 /* Subroutine of process_type_comp_unit and dwarf2_build_psymtabs_hard
1855 to combine the common parts.
1856 Process a compilation unit for a psymtab.
1857 BUFFER is a pointer to the beginning of the dwarf section buffer,
1858 either .debug_info or debug_types.
1859 INFO_PTR is a pointer to the start of the CU.
1860 Returns a pointer to the next CU. */
1863 process_psymtab_comp_unit (struct objfile *objfile,
1864 struct dwarf2_per_cu_data *this_cu,
1865 gdb_byte *buffer, gdb_byte *info_ptr,
1866 unsigned int buffer_size)
1868 bfd *abfd = objfile->obfd;
1869 gdb_byte *beg_of_comp_unit = info_ptr;
1870 struct die_info *comp_unit_die;
1871 struct partial_symtab *pst;
1873 struct cleanup *back_to_inner;
1874 struct dwarf2_cu cu;
1875 unsigned int bytes_read;
1876 int has_children, has_pc_info;
1877 struct attribute *attr;
1879 CORE_ADDR best_lowpc = 0, best_highpc = 0;
1880 struct die_reader_specs reader_specs;
1882 memset (&cu, 0, sizeof (cu));
1883 cu.objfile = objfile;
1884 obstack_init (&cu.comp_unit_obstack);
1886 back_to_inner = make_cleanup (free_stack_comp_unit, &cu);
1888 info_ptr = partial_read_comp_unit_head (&cu.header, info_ptr,
1889 buffer, buffer_size,
1892 /* Complete the cu_header. */
1893 cu.header.offset = beg_of_comp_unit - buffer;
1894 cu.header.first_die_offset = info_ptr - beg_of_comp_unit;
1896 cu.list_in_scope = &file_symbols;
1898 /* If this compilation unit was already read in, free the
1899 cached copy in order to read it in again. This is
1900 necessary because we skipped some symbols when we first
1901 read in the compilation unit (see load_partial_dies).
1902 This problem could be avoided, but the benefit is
1904 if (this_cu->cu != NULL)
1905 free_one_cached_comp_unit (this_cu->cu);
1907 /* Note that this is a pointer to our stack frame, being
1908 added to a global data structure. It will be cleaned up
1909 in free_stack_comp_unit when we finish with this
1910 compilation unit. */
1912 cu.per_cu = this_cu;
1914 /* Read the abbrevs for this compilation unit into a table. */
1915 dwarf2_read_abbrevs (abfd, &cu);
1916 make_cleanup (dwarf2_free_abbrev_table, &cu);
1918 /* Read the compilation unit die. */
1919 if (this_cu->from_debug_types)
1920 info_ptr += 8 /*signature*/ + cu.header.offset_size;
1921 init_cu_die_reader (&reader_specs, &cu);
1922 info_ptr = read_full_die (&reader_specs, &comp_unit_die, info_ptr,
1925 if (this_cu->from_debug_types)
1927 /* offset,length haven't been set yet for type units. */
1928 this_cu->offset = cu.header.offset;
1929 this_cu->length = cu.header.length + cu.header.initial_length_size;
1931 else if (comp_unit_die->tag == DW_TAG_partial_unit)
1933 info_ptr = (beg_of_comp_unit + cu.header.length
1934 + cu.header.initial_length_size);
1935 do_cleanups (back_to_inner);
1939 /* Set the language we're debugging. */
1940 attr = dwarf2_attr (comp_unit_die, DW_AT_language, &cu);
1942 set_cu_language (DW_UNSND (attr), &cu);
1944 set_cu_language (language_minimal, &cu);
1946 /* Allocate a new partial symbol table structure. */
1947 attr = dwarf2_attr (comp_unit_die, DW_AT_name, &cu);
1948 pst = start_psymtab_common (objfile, objfile->section_offsets,
1949 (attr != NULL) ? DW_STRING (attr) : "",
1950 /* TEXTLOW and TEXTHIGH are set below. */
1952 objfile->global_psymbols.next,
1953 objfile->static_psymbols.next);
1955 attr = dwarf2_attr (comp_unit_die, DW_AT_comp_dir, &cu);
1957 pst->dirname = DW_STRING (attr);
1959 pst->read_symtab_private = (char *) this_cu;
1961 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
1963 /* Store the function that reads in the rest of the symbol table */
1964 pst->read_symtab = dwarf2_psymtab_to_symtab;
1966 this_cu->psymtab = pst;
1968 dwarf2_find_base_address (comp_unit_die, &cu);
1970 /* Possibly set the default values of LOWPC and HIGHPC from
1972 has_pc_info = dwarf2_get_pc_bounds (comp_unit_die, &best_lowpc,
1973 &best_highpc, &cu, pst);
1974 if (has_pc_info == 1 && best_lowpc < best_highpc)
1975 /* Store the contiguous range if it is not empty; it can be empty for
1976 CUs with no code. */
1977 addrmap_set_empty (objfile->psymtabs_addrmap,
1978 best_lowpc + baseaddr,
1979 best_highpc + baseaddr - 1, pst);
1981 /* Check if comp unit has_children.
1982 If so, read the rest of the partial symbols from this comp unit.
1983 If not, there's no more debug_info for this comp unit. */
1986 struct partial_die_info *first_die;
1987 CORE_ADDR lowpc, highpc;
1989 lowpc = ((CORE_ADDR) -1);
1990 highpc = ((CORE_ADDR) 0);
1992 first_die = load_partial_dies (abfd, buffer, info_ptr, 1, &cu);
1994 scan_partial_symbols (first_die, &lowpc, &highpc,
1995 ! has_pc_info, &cu);
1997 /* If we didn't find a lowpc, set it to highpc to avoid
1998 complaints from `maint check'. */
1999 if (lowpc == ((CORE_ADDR) -1))
2002 /* If the compilation unit didn't have an explicit address range,
2003 then use the information extracted from its child dies. */
2007 best_highpc = highpc;
2010 pst->textlow = best_lowpc + baseaddr;
2011 pst->texthigh = best_highpc + baseaddr;
2013 pst->n_global_syms = objfile->global_psymbols.next -
2014 (objfile->global_psymbols.list + pst->globals_offset);
2015 pst->n_static_syms = objfile->static_psymbols.next -
2016 (objfile->static_psymbols.list + pst->statics_offset);
2017 sort_pst_symbols (pst);
2019 info_ptr = (beg_of_comp_unit + cu.header.length
2020 + cu.header.initial_length_size);
2022 if (this_cu->from_debug_types)
2024 /* It's not clear we want to do anything with stmt lists here.
2025 Waiting to see what gcc ultimately does. */
2029 /* Get the list of files included in the current compilation unit,
2030 and build a psymtab for each of them. */
2031 dwarf2_build_include_psymtabs (&cu, comp_unit_die, pst);
2034 do_cleanups (back_to_inner);
2039 /* Traversal function for htab_traverse_noresize.
2040 Process one .debug_types comp-unit. */
2043 process_type_comp_unit (void **slot, void *info)
2045 struct signatured_type *entry = (struct signatured_type *) *slot;
2046 struct objfile *objfile = (struct objfile *) info;
2047 struct dwarf2_per_cu_data *this_cu;
2049 this_cu = &entry->per_cu;
2050 this_cu->from_debug_types = 1;
2052 process_psymtab_comp_unit (objfile, this_cu,
2053 dwarf2_per_objfile->types.buffer,
2054 dwarf2_per_objfile->types.buffer + entry->offset,
2055 dwarf2_per_objfile->types.size);
2060 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
2061 Build partial symbol tables for the .debug_types comp-units. */
2064 build_type_psymtabs (struct objfile *objfile)
2066 if (! create_debug_types_hash_table (objfile))
2069 htab_traverse_noresize (dwarf2_per_objfile->signatured_types,
2070 process_type_comp_unit, objfile);
2073 /* Build the partial symbol table by doing a quick pass through the
2074 .debug_info and .debug_abbrev sections. */
2077 dwarf2_build_psymtabs_hard (struct objfile *objfile)
2079 /* Instead of reading this into a big buffer, we should probably use
2080 mmap() on architectures that support it. (FIXME) */
2081 bfd *abfd = objfile->obfd;
2083 struct cleanup *back_to;
2085 info_ptr = dwarf2_per_objfile->info.buffer;
2087 /* Any cached compilation units will be linked by the per-objfile
2088 read_in_chain. Make sure to free them when we're done. */
2089 back_to = make_cleanup (free_cached_comp_units, NULL);
2091 build_type_psymtabs (objfile);
2093 create_all_comp_units (objfile);
2095 objfile->psymtabs_addrmap =
2096 addrmap_create_mutable (&objfile->objfile_obstack);
2098 /* Since the objects we're extracting from .debug_info vary in
2099 length, only the individual functions to extract them (like
2100 read_comp_unit_head and load_partial_die) can really know whether
2101 the buffer is large enough to hold another complete object.
2103 At the moment, they don't actually check that. If .debug_info
2104 holds just one extra byte after the last compilation unit's dies,
2105 then read_comp_unit_head will happily read off the end of the
2106 buffer. read_partial_die is similarly casual. Those functions
2109 For this loop condition, simply checking whether there's any data
2110 left at all should be sufficient. */
2112 while (info_ptr < (dwarf2_per_objfile->info.buffer
2113 + dwarf2_per_objfile->info.size))
2115 struct dwarf2_per_cu_data *this_cu;
2117 this_cu = dwarf2_find_comp_unit (info_ptr - dwarf2_per_objfile->info.buffer,
2120 info_ptr = process_psymtab_comp_unit (objfile, this_cu,
2121 dwarf2_per_objfile->info.buffer,
2123 dwarf2_per_objfile->info.size);
2126 objfile->psymtabs_addrmap = addrmap_create_fixed (objfile->psymtabs_addrmap,
2127 &objfile->objfile_obstack);
2129 do_cleanups (back_to);
2132 /* Load the partial DIEs for a secondary CU into memory. */
2135 load_partial_comp_unit (struct dwarf2_per_cu_data *this_cu,
2136 struct objfile *objfile)
2138 bfd *abfd = objfile->obfd;
2139 gdb_byte *info_ptr, *beg_of_comp_unit;
2140 struct die_info *comp_unit_die;
2141 struct dwarf2_cu *cu;
2142 unsigned int bytes_read;
2143 struct cleanup *back_to;
2144 struct attribute *attr;
2146 struct die_reader_specs reader_specs;
2148 gdb_assert (! this_cu->from_debug_types);
2150 info_ptr = dwarf2_per_objfile->info.buffer + this_cu->offset;
2151 beg_of_comp_unit = info_ptr;
2153 cu = alloc_one_comp_unit (objfile);
2155 /* ??? Missing cleanup for CU? */
2157 /* Link this compilation unit into the compilation unit tree. */
2159 cu->per_cu = this_cu;
2160 cu->type_hash = this_cu->type_hash;
2162 info_ptr = partial_read_comp_unit_head (&cu->header, info_ptr,
2163 dwarf2_per_objfile->info.buffer,
2164 dwarf2_per_objfile->info.size,
2167 /* Complete the cu_header. */
2168 cu->header.offset = this_cu->offset;
2169 cu->header.first_die_offset = info_ptr - beg_of_comp_unit;
2171 /* Read the abbrevs for this compilation unit into a table. */
2172 dwarf2_read_abbrevs (abfd, cu);
2173 back_to = make_cleanup (dwarf2_free_abbrev_table, cu);
2175 /* Read the compilation unit die. */
2176 init_cu_die_reader (&reader_specs, cu);
2177 info_ptr = read_full_die (&reader_specs, &comp_unit_die, info_ptr,
2180 /* Set the language we're debugging. */
2181 attr = dwarf2_attr (comp_unit_die, DW_AT_language, cu);
2183 set_cu_language (DW_UNSND (attr), cu);
2185 set_cu_language (language_minimal, cu);
2187 /* Check if comp unit has_children.
2188 If so, read the rest of the partial symbols from this comp unit.
2189 If not, there's no more debug_info for this comp unit. */
2191 load_partial_dies (abfd, dwarf2_per_objfile->info.buffer, info_ptr, 0, cu);
2193 do_cleanups (back_to);
2196 /* Create a list of all compilation units in OBJFILE. We do this only
2197 if an inter-comp-unit reference is found; presumably if there is one,
2198 there will be many, and one will occur early in the .debug_info section.
2199 So there's no point in building this list incrementally. */
2202 create_all_comp_units (struct objfile *objfile)
2206 struct dwarf2_per_cu_data **all_comp_units;
2207 gdb_byte *info_ptr = dwarf2_per_objfile->info.buffer;
2211 all_comp_units = xmalloc (n_allocated
2212 * sizeof (struct dwarf2_per_cu_data *));
2214 while (info_ptr < dwarf2_per_objfile->info.buffer + dwarf2_per_objfile->info.size)
2216 unsigned int length, initial_length_size;
2217 gdb_byte *beg_of_comp_unit;
2218 struct dwarf2_per_cu_data *this_cu;
2219 unsigned int offset;
2221 offset = info_ptr - dwarf2_per_objfile->info.buffer;
2223 /* Read just enough information to find out where the next
2224 compilation unit is. */
2225 length = read_initial_length (objfile->obfd, info_ptr,
2226 &initial_length_size);
2228 /* Save the compilation unit for later lookup. */
2229 this_cu = obstack_alloc (&objfile->objfile_obstack,
2230 sizeof (struct dwarf2_per_cu_data));
2231 memset (this_cu, 0, sizeof (*this_cu));
2232 this_cu->offset = offset;
2233 this_cu->length = length + initial_length_size;
2235 if (n_comp_units == n_allocated)
2238 all_comp_units = xrealloc (all_comp_units,
2240 * sizeof (struct dwarf2_per_cu_data *));
2242 all_comp_units[n_comp_units++] = this_cu;
2244 info_ptr = info_ptr + this_cu->length;
2247 dwarf2_per_objfile->all_comp_units
2248 = obstack_alloc (&objfile->objfile_obstack,
2249 n_comp_units * sizeof (struct dwarf2_per_cu_data *));
2250 memcpy (dwarf2_per_objfile->all_comp_units, all_comp_units,
2251 n_comp_units * sizeof (struct dwarf2_per_cu_data *));
2252 xfree (all_comp_units);
2253 dwarf2_per_objfile->n_comp_units = n_comp_units;
2256 /* Process all loaded DIEs for compilation unit CU, starting at
2257 FIRST_DIE. The caller should pass NEED_PC == 1 if the compilation
2258 unit DIE did not have PC info (DW_AT_low_pc and DW_AT_high_pc, or
2259 DW_AT_ranges). If NEED_PC is set, then this function will set
2260 *LOWPC and *HIGHPC to the lowest and highest PC values found in CU
2261 and record the covered ranges in the addrmap. */
2264 scan_partial_symbols (struct partial_die_info *first_die, CORE_ADDR *lowpc,
2265 CORE_ADDR *highpc, int need_pc, struct dwarf2_cu *cu)
2267 struct objfile *objfile = cu->objfile;
2268 bfd *abfd = objfile->obfd;
2269 struct partial_die_info *pdi;
2271 /* Now, march along the PDI's, descending into ones which have
2272 interesting children but skipping the children of the other ones,
2273 until we reach the end of the compilation unit. */
2279 fixup_partial_die (pdi, cu);
2281 /* Anonymous namespaces have no name but have interesting
2282 children, so we need to look at them. Ditto for anonymous
2285 if (pdi->name != NULL || pdi->tag == DW_TAG_namespace
2286 || pdi->tag == DW_TAG_enumeration_type)
2290 case DW_TAG_subprogram:
2291 add_partial_subprogram (pdi, lowpc, highpc, need_pc, cu);
2293 case DW_TAG_variable:
2294 case DW_TAG_typedef:
2295 case DW_TAG_union_type:
2296 if (!pdi->is_declaration)
2298 add_partial_symbol (pdi, cu);
2301 case DW_TAG_class_type:
2302 case DW_TAG_interface_type:
2303 case DW_TAG_structure_type:
2304 if (!pdi->is_declaration)
2306 add_partial_symbol (pdi, cu);
2309 case DW_TAG_enumeration_type:
2310 if (!pdi->is_declaration)
2311 add_partial_enumeration (pdi, cu);
2313 case DW_TAG_base_type:
2314 case DW_TAG_subrange_type:
2315 /* File scope base type definitions are added to the partial
2317 add_partial_symbol (pdi, cu);
2319 case DW_TAG_namespace:
2320 add_partial_namespace (pdi, lowpc, highpc, need_pc, cu);
2323 add_partial_module (pdi, lowpc, highpc, need_pc, cu);
2330 /* If the die has a sibling, skip to the sibling. */
2332 pdi = pdi->die_sibling;
2336 /* Functions used to compute the fully scoped name of a partial DIE.
2338 Normally, this is simple. For C++, the parent DIE's fully scoped
2339 name is concatenated with "::" and the partial DIE's name. For
2340 Java, the same thing occurs except that "." is used instead of "::".
2341 Enumerators are an exception; they use the scope of their parent
2342 enumeration type, i.e. the name of the enumeration type is not
2343 prepended to the enumerator.
2345 There are two complexities. One is DW_AT_specification; in this
2346 case "parent" means the parent of the target of the specification,
2347 instead of the direct parent of the DIE. The other is compilers
2348 which do not emit DW_TAG_namespace; in this case we try to guess
2349 the fully qualified name of structure types from their members'
2350 linkage names. This must be done using the DIE's children rather
2351 than the children of any DW_AT_specification target. We only need
2352 to do this for structures at the top level, i.e. if the target of
2353 any DW_AT_specification (if any; otherwise the DIE itself) does not
2356 /* Compute the scope prefix associated with PDI's parent, in
2357 compilation unit CU. The result will be allocated on CU's
2358 comp_unit_obstack, or a copy of the already allocated PDI->NAME
2359 field. NULL is returned if no prefix is necessary. */
2361 partial_die_parent_scope (struct partial_die_info *pdi,
2362 struct dwarf2_cu *cu)
2364 char *grandparent_scope;
2365 struct partial_die_info *parent, *real_pdi;
2367 /* We need to look at our parent DIE; if we have a DW_AT_specification,
2368 then this means the parent of the specification DIE. */
2371 while (real_pdi->has_specification)
2372 real_pdi = find_partial_die (real_pdi->spec_offset, cu);
2374 parent = real_pdi->die_parent;
2378 if (parent->scope_set)
2379 return parent->scope;
2381 fixup_partial_die (parent, cu);
2383 grandparent_scope = partial_die_parent_scope (parent, cu);
2385 if (parent->tag == DW_TAG_namespace
2386 || parent->tag == DW_TAG_structure_type
2387 || parent->tag == DW_TAG_class_type
2388 || parent->tag == DW_TAG_interface_type
2389 || parent->tag == DW_TAG_union_type
2390 || parent->tag == DW_TAG_enumeration_type)
2392 if (grandparent_scope == NULL)
2393 parent->scope = parent->name;
2395 parent->scope = typename_concat (&cu->comp_unit_obstack, grandparent_scope,
2398 else if (parent->tag == DW_TAG_enumerator)
2399 /* Enumerators should not get the name of the enumeration as a prefix. */
2400 parent->scope = grandparent_scope;
2403 /* FIXME drow/2004-04-01: What should we be doing with
2404 function-local names? For partial symbols, we should probably be
2406 complaint (&symfile_complaints,
2407 _("unhandled containing DIE tag %d for DIE at %d"),
2408 parent->tag, pdi->offset);
2409 parent->scope = grandparent_scope;
2412 parent->scope_set = 1;
2413 return parent->scope;
2416 /* Return the fully scoped name associated with PDI, from compilation unit
2417 CU. The result will be allocated with malloc. */
2419 partial_die_full_name (struct partial_die_info *pdi,
2420 struct dwarf2_cu *cu)
2424 parent_scope = partial_die_parent_scope (pdi, cu);
2425 if (parent_scope == NULL)
2428 return typename_concat (NULL, parent_scope, pdi->name, cu);
2432 add_partial_symbol (struct partial_die_info *pdi, struct dwarf2_cu *cu)
2434 struct objfile *objfile = cu->objfile;
2436 char *actual_name = NULL;
2437 const char *my_prefix;
2438 const struct partial_symbol *psym = NULL;
2440 int built_actual_name = 0;
2442 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
2444 if (pdi_needs_namespace (pdi->tag))
2446 actual_name = partial_die_full_name (pdi, cu);
2448 built_actual_name = 1;
2451 if (actual_name == NULL)
2452 actual_name = pdi->name;
2456 case DW_TAG_subprogram:
2457 if (pdi->is_external || cu->language == language_ada)
2459 /* brobecker/2007-12-26: Normally, only "external" DIEs are part
2460 of the global scope. But in Ada, we want to be able to access
2461 nested procedures globally. So all Ada subprograms are stored
2462 in the global scope. */
2463 /*prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr,
2464 mst_text, objfile); */
2465 psym = add_psymbol_to_list (actual_name, strlen (actual_name),
2467 VAR_DOMAIN, LOC_BLOCK,
2468 &objfile->global_psymbols,
2469 0, pdi->lowpc + baseaddr,
2470 cu->language, objfile);
2474 /*prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr,
2475 mst_file_text, objfile); */
2476 psym = add_psymbol_to_list (actual_name, strlen (actual_name),
2478 VAR_DOMAIN, LOC_BLOCK,
2479 &objfile->static_psymbols,
2480 0, pdi->lowpc + baseaddr,
2481 cu->language, objfile);
2484 case DW_TAG_variable:
2485 if (pdi->is_external)
2488 Don't enter into the minimal symbol tables as there is
2489 a minimal symbol table entry from the ELF symbols already.
2490 Enter into partial symbol table if it has a location
2491 descriptor or a type.
2492 If the location descriptor is missing, new_symbol will create
2493 a LOC_UNRESOLVED symbol, the address of the variable will then
2494 be determined from the minimal symbol table whenever the variable
2496 The address for the partial symbol table entry is not
2497 used by GDB, but it comes in handy for debugging partial symbol
2501 addr = decode_locdesc (pdi->locdesc, cu);
2502 if (pdi->locdesc || pdi->has_type)
2503 psym = add_psymbol_to_list (actual_name, strlen (actual_name),
2505 VAR_DOMAIN, LOC_STATIC,
2506 &objfile->global_psymbols,
2508 cu->language, objfile);
2512 /* Static Variable. Skip symbols without location descriptors. */
2513 if (pdi->locdesc == NULL)
2515 if (built_actual_name)
2516 xfree (actual_name);
2519 addr = decode_locdesc (pdi->locdesc, cu);
2520 /*prim_record_minimal_symbol (actual_name, addr + baseaddr,
2521 mst_file_data, objfile); */
2522 psym = add_psymbol_to_list (actual_name, strlen (actual_name),
2524 VAR_DOMAIN, LOC_STATIC,
2525 &objfile->static_psymbols,
2527 cu->language, objfile);
2530 case DW_TAG_typedef:
2531 case DW_TAG_base_type:
2532 case DW_TAG_subrange_type:
2533 add_psymbol_to_list (actual_name, strlen (actual_name),
2535 VAR_DOMAIN, LOC_TYPEDEF,
2536 &objfile->static_psymbols,
2537 0, (CORE_ADDR) 0, cu->language, objfile);
2539 case DW_TAG_namespace:
2540 add_psymbol_to_list (actual_name, strlen (actual_name),
2542 VAR_DOMAIN, LOC_TYPEDEF,
2543 &objfile->global_psymbols,
2544 0, (CORE_ADDR) 0, cu->language, objfile);
2546 case DW_TAG_class_type:
2547 case DW_TAG_interface_type:
2548 case DW_TAG_structure_type:
2549 case DW_TAG_union_type:
2550 case DW_TAG_enumeration_type:
2551 /* Skip external references. The DWARF standard says in the section
2552 about "Structure, Union, and Class Type Entries": "An incomplete
2553 structure, union or class type is represented by a structure,
2554 union or class entry that does not have a byte size attribute
2555 and that has a DW_AT_declaration attribute." */
2556 if (!pdi->has_byte_size && pdi->is_declaration)
2558 if (built_actual_name)
2559 xfree (actual_name);
2563 /* NOTE: carlton/2003-10-07: See comment in new_symbol about
2564 static vs. global. */
2565 add_psymbol_to_list (actual_name, strlen (actual_name),
2567 STRUCT_DOMAIN, LOC_TYPEDEF,
2568 (cu->language == language_cplus
2569 || cu->language == language_java)
2570 ? &objfile->global_psymbols
2571 : &objfile->static_psymbols,
2572 0, (CORE_ADDR) 0, cu->language, objfile);
2575 case DW_TAG_enumerator:
2576 add_psymbol_to_list (actual_name, strlen (actual_name),
2578 VAR_DOMAIN, LOC_CONST,
2579 (cu->language == language_cplus
2580 || cu->language == language_java)
2581 ? &objfile->global_psymbols
2582 : &objfile->static_psymbols,
2583 0, (CORE_ADDR) 0, cu->language, objfile);
2589 /* Check to see if we should scan the name for possible namespace
2590 info. Only do this if this is C++, if we don't have namespace
2591 debugging info in the file, if the psym is of an appropriate type
2592 (otherwise we'll have psym == NULL), and if we actually had a
2593 mangled name to begin with. */
2595 /* FIXME drow/2004-02-22: Why don't we do this for classes, i.e. the
2596 cases which do not set PSYM above? */
2598 if (cu->language == language_cplus
2599 && cu->has_namespace_info == 0
2601 && SYMBOL_CPLUS_DEMANGLED_NAME (psym) != NULL)
2602 cp_check_possible_namespace_symbols (SYMBOL_CPLUS_DEMANGLED_NAME (psym),
2605 if (built_actual_name)
2606 xfree (actual_name);
2609 /* Determine whether a die of type TAG living in a C++ class or
2610 namespace needs to have the name of the scope prepended to the
2611 name listed in the die. */
2614 pdi_needs_namespace (enum dwarf_tag tag)
2618 case DW_TAG_namespace:
2619 case DW_TAG_typedef:
2620 case DW_TAG_class_type:
2621 case DW_TAG_interface_type:
2622 case DW_TAG_structure_type:
2623 case DW_TAG_union_type:
2624 case DW_TAG_enumeration_type:
2625 case DW_TAG_enumerator:
2632 /* Read a partial die corresponding to a namespace; also, add a symbol
2633 corresponding to that namespace to the symbol table. NAMESPACE is
2634 the name of the enclosing namespace. */
2637 add_partial_namespace (struct partial_die_info *pdi,
2638 CORE_ADDR *lowpc, CORE_ADDR *highpc,
2639 int need_pc, struct dwarf2_cu *cu)
2641 struct objfile *objfile = cu->objfile;
2643 /* Add a symbol for the namespace. */
2645 add_partial_symbol (pdi, cu);
2647 /* Now scan partial symbols in that namespace. */
2649 if (pdi->has_children)
2650 scan_partial_symbols (pdi->die_child, lowpc, highpc, need_pc, cu);
2653 /* Read a partial die corresponding to a Fortran module. */
2656 add_partial_module (struct partial_die_info *pdi, CORE_ADDR *lowpc,
2657 CORE_ADDR *highpc, int need_pc, struct dwarf2_cu *cu)
2659 /* Now scan partial symbols in that module.
2661 FIXME: Support the separate Fortran module namespaces. */
2663 if (pdi->has_children)
2664 scan_partial_symbols (pdi->die_child, lowpc, highpc, need_pc, cu);
2667 /* Read a partial die corresponding to a subprogram and create a partial
2668 symbol for that subprogram. When the CU language allows it, this
2669 routine also defines a partial symbol for each nested subprogram
2670 that this subprogram contains.
2672 DIE my also be a lexical block, in which case we simply search
2673 recursively for suprograms defined inside that lexical block.
2674 Again, this is only performed when the CU language allows this
2675 type of definitions. */
2678 add_partial_subprogram (struct partial_die_info *pdi,
2679 CORE_ADDR *lowpc, CORE_ADDR *highpc,
2680 int need_pc, struct dwarf2_cu *cu)
2682 if (pdi->tag == DW_TAG_subprogram)
2684 if (pdi->has_pc_info)
2686 if (pdi->lowpc < *lowpc)
2687 *lowpc = pdi->lowpc;
2688 if (pdi->highpc > *highpc)
2689 *highpc = pdi->highpc;
2693 struct objfile *objfile = cu->objfile;
2695 baseaddr = ANOFFSET (objfile->section_offsets,
2696 SECT_OFF_TEXT (objfile));
2697 addrmap_set_empty (objfile->psymtabs_addrmap,
2698 pdi->lowpc, pdi->highpc - 1,
2699 cu->per_cu->psymtab);
2701 if (!pdi->is_declaration)
2702 add_partial_symbol (pdi, cu);
2706 if (! pdi->has_children)
2709 if (cu->language == language_ada)
2711 pdi = pdi->die_child;
2714 fixup_partial_die (pdi, cu);
2715 if (pdi->tag == DW_TAG_subprogram
2716 || pdi->tag == DW_TAG_lexical_block)
2717 add_partial_subprogram (pdi, lowpc, highpc, need_pc, cu);
2718 pdi = pdi->die_sibling;
2723 /* See if we can figure out if the class lives in a namespace. We do
2724 this by looking for a member function; its demangled name will
2725 contain namespace info, if there is any. */
2728 guess_structure_name (struct partial_die_info *struct_pdi,
2729 struct dwarf2_cu *cu)
2731 if ((cu->language == language_cplus
2732 || cu->language == language_java)
2733 && cu->has_namespace_info == 0
2734 && struct_pdi->has_children)
2736 /* NOTE: carlton/2003-10-07: Getting the info this way changes
2737 what template types look like, because the demangler
2738 frequently doesn't give the same name as the debug info. We
2739 could fix this by only using the demangled name to get the
2740 prefix (but see comment in read_structure_type). */
2742 struct partial_die_info *child_pdi = struct_pdi->die_child;
2743 struct partial_die_info *real_pdi;
2745 /* If this DIE (this DIE's specification, if any) has a parent, then
2746 we should not do this. We'll prepend the parent's fully qualified
2747 name when we create the partial symbol. */
2749 real_pdi = struct_pdi;
2750 while (real_pdi->has_specification)
2751 real_pdi = find_partial_die (real_pdi->spec_offset, cu);
2753 if (real_pdi->die_parent != NULL)
2756 while (child_pdi != NULL)
2758 if (child_pdi->tag == DW_TAG_subprogram)
2760 char *actual_class_name
2761 = language_class_name_from_physname (cu->language_defn,
2763 if (actual_class_name != NULL)
2766 = obsavestring (actual_class_name,
2767 strlen (actual_class_name),
2768 &cu->comp_unit_obstack);
2769 xfree (actual_class_name);
2774 child_pdi = child_pdi->die_sibling;
2779 /* Read a partial die corresponding to an enumeration type. */
2782 add_partial_enumeration (struct partial_die_info *enum_pdi,
2783 struct dwarf2_cu *cu)
2785 struct objfile *objfile = cu->objfile;
2786 bfd *abfd = objfile->obfd;
2787 struct partial_die_info *pdi;
2789 if (enum_pdi->name != NULL)
2790 add_partial_symbol (enum_pdi, cu);
2792 pdi = enum_pdi->die_child;
2795 if (pdi->tag != DW_TAG_enumerator || pdi->name == NULL)
2796 complaint (&symfile_complaints, _("malformed enumerator DIE ignored"));
2798 add_partial_symbol (pdi, cu);
2799 pdi = pdi->die_sibling;
2803 /* Read the initial uleb128 in the die at INFO_PTR in compilation unit CU.
2804 Return the corresponding abbrev, or NULL if the number is zero (indicating
2805 an empty DIE). In either case *BYTES_READ will be set to the length of
2806 the initial number. */
2808 static struct abbrev_info *
2809 peek_die_abbrev (gdb_byte *info_ptr, unsigned int *bytes_read,
2810 struct dwarf2_cu *cu)
2812 bfd *abfd = cu->objfile->obfd;
2813 unsigned int abbrev_number;
2814 struct abbrev_info *abbrev;
2816 abbrev_number = read_unsigned_leb128 (abfd, info_ptr, bytes_read);
2818 if (abbrev_number == 0)
2821 abbrev = dwarf2_lookup_abbrev (abbrev_number, cu);
2824 error (_("Dwarf Error: Could not find abbrev number %d [in module %s]"), abbrev_number,
2825 bfd_get_filename (abfd));
2831 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
2832 Returns a pointer to the end of a series of DIEs, terminated by an empty
2833 DIE. Any children of the skipped DIEs will also be skipped. */
2836 skip_children (gdb_byte *buffer, gdb_byte *info_ptr, struct dwarf2_cu *cu)
2838 struct abbrev_info *abbrev;
2839 unsigned int bytes_read;
2843 abbrev = peek_die_abbrev (info_ptr, &bytes_read, cu);
2845 return info_ptr + bytes_read;
2847 info_ptr = skip_one_die (buffer, info_ptr + bytes_read, abbrev, cu);
2851 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
2852 INFO_PTR should point just after the initial uleb128 of a DIE, and the
2853 abbrev corresponding to that skipped uleb128 should be passed in
2854 ABBREV. Returns a pointer to this DIE's sibling, skipping any
2858 skip_one_die (gdb_byte *buffer, gdb_byte *info_ptr,
2859 struct abbrev_info *abbrev, struct dwarf2_cu *cu)
2861 unsigned int bytes_read;
2862 struct attribute attr;
2863 bfd *abfd = cu->objfile->obfd;
2864 unsigned int form, i;
2866 for (i = 0; i < abbrev->num_attrs; i++)
2868 /* The only abbrev we care about is DW_AT_sibling. */
2869 if (abbrev->attrs[i].name == DW_AT_sibling)
2871 read_attribute (&attr, &abbrev->attrs[i],
2872 abfd, info_ptr, cu);
2873 if (attr.form == DW_FORM_ref_addr)
2874 complaint (&symfile_complaints, _("ignoring absolute DW_AT_sibling"));
2876 return buffer + dwarf2_get_ref_die_offset (&attr);
2879 /* If it isn't DW_AT_sibling, skip this attribute. */
2880 form = abbrev->attrs[i].form;
2885 case DW_FORM_ref_addr:
2886 info_ptr += cu->header.addr_size;
2906 case DW_FORM_string:
2907 read_string (abfd, info_ptr, &bytes_read);
2908 info_ptr += bytes_read;
2911 info_ptr += cu->header.offset_size;
2914 info_ptr += read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
2915 info_ptr += bytes_read;
2917 case DW_FORM_block1:
2918 info_ptr += 1 + read_1_byte (abfd, info_ptr);
2920 case DW_FORM_block2:
2921 info_ptr += 2 + read_2_bytes (abfd, info_ptr);
2923 case DW_FORM_block4:
2924 info_ptr += 4 + read_4_bytes (abfd, info_ptr);
2928 case DW_FORM_ref_udata:
2929 info_ptr = skip_leb128 (abfd, info_ptr);
2931 case DW_FORM_indirect:
2932 form = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
2933 info_ptr += bytes_read;
2934 /* We need to continue parsing from here, so just go back to
2936 goto skip_attribute;
2939 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
2940 dwarf_form_name (form),
2941 bfd_get_filename (abfd));
2945 if (abbrev->has_children)
2946 return skip_children (buffer, info_ptr, cu);
2951 /* Locate ORIG_PDI's sibling.
2952 INFO_PTR should point to the start of the next DIE after ORIG_PDI
2956 locate_pdi_sibling (struct partial_die_info *orig_pdi,
2957 gdb_byte *buffer, gdb_byte *info_ptr,
2958 bfd *abfd, struct dwarf2_cu *cu)
2960 /* Do we know the sibling already? */
2962 if (orig_pdi->sibling)
2963 return orig_pdi->sibling;
2965 /* Are there any children to deal with? */
2967 if (!orig_pdi->has_children)
2970 /* Skip the children the long way. */
2972 return skip_children (buffer, info_ptr, cu);
2975 /* Expand this partial symbol table into a full symbol table. */
2978 dwarf2_psymtab_to_symtab (struct partial_symtab *pst)
2980 /* FIXME: This is barely more than a stub. */
2985 warning (_("bug: psymtab for %s is already read in."), pst->filename);
2991 printf_filtered (_("Reading in symbols for %s..."), pst->filename);
2992 gdb_flush (gdb_stdout);
2995 /* Restore our global data. */
2996 dwarf2_per_objfile = objfile_data (pst->objfile,
2997 dwarf2_objfile_data_key);
2999 /* If this psymtab is constructed from a debug-only objfile, the
3000 has_section_at_zero flag will not necessarily be correct. We
3001 can get the correct value for this flag by looking at the data
3002 associated with the (presumably stripped) associated objfile. */
3003 if (pst->objfile->separate_debug_objfile_backlink)
3005 struct dwarf2_per_objfile *dpo_backlink
3006 = objfile_data (pst->objfile->separate_debug_objfile_backlink,
3007 dwarf2_objfile_data_key);
3008 dwarf2_per_objfile->has_section_at_zero
3009 = dpo_backlink->has_section_at_zero;
3012 psymtab_to_symtab_1 (pst);
3014 /* Finish up the debug error message. */
3016 printf_filtered (_("done.\n"));
3021 /* Add PER_CU to the queue. */
3024 queue_comp_unit (struct dwarf2_per_cu_data *per_cu, struct objfile *objfile)
3026 struct dwarf2_queue_item *item;
3029 item = xmalloc (sizeof (*item));
3030 item->per_cu = per_cu;
3033 if (dwarf2_queue == NULL)
3034 dwarf2_queue = item;
3036 dwarf2_queue_tail->next = item;
3038 dwarf2_queue_tail = item;
3041 /* Process the queue. */
3044 process_queue (struct objfile *objfile)
3046 struct dwarf2_queue_item *item, *next_item;
3048 /* The queue starts out with one item, but following a DIE reference
3049 may load a new CU, adding it to the end of the queue. */
3050 for (item = dwarf2_queue; item != NULL; dwarf2_queue = item = next_item)
3052 if (item->per_cu->psymtab && !item->per_cu->psymtab->readin)
3053 process_full_comp_unit (item->per_cu);
3055 item->per_cu->queued = 0;
3056 next_item = item->next;
3060 dwarf2_queue_tail = NULL;
3063 /* Free all allocated queue entries. This function only releases anything if
3064 an error was thrown; if the queue was processed then it would have been
3065 freed as we went along. */
3068 dwarf2_release_queue (void *dummy)
3070 struct dwarf2_queue_item *item, *last;
3072 item = dwarf2_queue;
3075 /* Anything still marked queued is likely to be in an
3076 inconsistent state, so discard it. */
3077 if (item->per_cu->queued)
3079 if (item->per_cu->cu != NULL)
3080 free_one_cached_comp_unit (item->per_cu->cu);
3081 item->per_cu->queued = 0;
3089 dwarf2_queue = dwarf2_queue_tail = NULL;
3092 /* Read in full symbols for PST, and anything it depends on. */
3095 psymtab_to_symtab_1 (struct partial_symtab *pst)
3097 struct dwarf2_per_cu_data *per_cu;
3098 struct cleanup *back_to;
3101 for (i = 0; i < pst->number_of_dependencies; i++)
3102 if (!pst->dependencies[i]->readin)
3104 /* Inform about additional files that need to be read in. */
3107 /* FIXME: i18n: Need to make this a single string. */
3108 fputs_filtered (" ", gdb_stdout);
3110 fputs_filtered ("and ", gdb_stdout);
3112 printf_filtered ("%s...", pst->dependencies[i]->filename);
3113 wrap_here (""); /* Flush output */
3114 gdb_flush (gdb_stdout);
3116 psymtab_to_symtab_1 (pst->dependencies[i]);
3119 per_cu = (struct dwarf2_per_cu_data *) pst->read_symtab_private;
3123 /* It's an include file, no symbols to read for it.
3124 Everything is in the parent symtab. */
3129 back_to = make_cleanup (dwarf2_release_queue, NULL);
3131 queue_comp_unit (per_cu, pst->objfile);
3133 if (per_cu->from_debug_types)
3134 read_signatured_type_at_offset (pst->objfile, per_cu->offset);
3136 load_full_comp_unit (per_cu, pst->objfile);
3138 process_queue (pst->objfile);
3140 /* Age the cache, releasing compilation units that have not
3141 been used recently. */
3142 age_cached_comp_units ();
3144 do_cleanups (back_to);
3147 /* Load the DIEs associated with PER_CU into memory. */
3150 load_full_comp_unit (struct dwarf2_per_cu_data *per_cu, struct objfile *objfile)
3152 bfd *abfd = objfile->obfd;
3153 struct dwarf2_cu *cu;
3154 unsigned int offset;
3155 gdb_byte *info_ptr, *beg_of_comp_unit;
3156 struct cleanup *back_to, *free_cu_cleanup;
3157 struct attribute *attr;
3160 gdb_assert (! per_cu->from_debug_types);
3162 /* Set local variables from the partial symbol table info. */
3163 offset = per_cu->offset;
3165 info_ptr = dwarf2_per_objfile->info.buffer + offset;
3166 beg_of_comp_unit = info_ptr;
3168 cu = alloc_one_comp_unit (objfile);
3170 /* If an error occurs while loading, release our storage. */
3171 free_cu_cleanup = make_cleanup (free_one_comp_unit, cu);
3173 /* Read in the comp_unit header. */
3174 info_ptr = read_comp_unit_head (&cu->header, info_ptr, abfd);
3176 /* Complete the cu_header. */
3177 cu->header.offset = offset;
3178 cu->header.first_die_offset = info_ptr - beg_of_comp_unit;
3180 /* Read the abbrevs for this compilation unit. */
3181 dwarf2_read_abbrevs (abfd, cu);
3182 back_to = make_cleanup (dwarf2_free_abbrev_table, cu);
3184 /* Link this compilation unit into the compilation unit tree. */
3186 cu->per_cu = per_cu;
3187 cu->type_hash = per_cu->type_hash;
3189 cu->dies = read_comp_unit (info_ptr, cu);
3191 /* We try not to read any attributes in this function, because not
3192 all objfiles needed for references have been loaded yet, and symbol
3193 table processing isn't initialized. But we have to set the CU language,
3194 or we won't be able to build types correctly. */
3195 attr = dwarf2_attr (cu->dies, DW_AT_language, cu);
3197 set_cu_language (DW_UNSND (attr), cu);
3199 set_cu_language (language_minimal, cu);
3201 /* Link this CU into read_in_chain. */
3202 per_cu->cu->read_in_chain = dwarf2_per_objfile->read_in_chain;
3203 dwarf2_per_objfile->read_in_chain = per_cu;
3205 do_cleanups (back_to);
3207 /* We've successfully allocated this compilation unit. Let our caller
3208 clean it up when finished with it. */
3209 discard_cleanups (free_cu_cleanup);
3212 /* Generate full symbol information for PST and CU, whose DIEs have
3213 already been loaded into memory. */
3216 process_full_comp_unit (struct dwarf2_per_cu_data *per_cu)
3218 struct partial_symtab *pst = per_cu->psymtab;
3219 struct dwarf2_cu *cu = per_cu->cu;
3220 struct objfile *objfile = pst->objfile;
3221 bfd *abfd = objfile->obfd;
3222 CORE_ADDR lowpc, highpc;
3223 struct symtab *symtab;
3224 struct cleanup *back_to;
3227 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
3230 back_to = make_cleanup (really_free_pendings, NULL);
3232 cu->list_in_scope = &file_symbols;
3234 dwarf2_find_base_address (cu->dies, cu);
3236 /* Do line number decoding in read_file_scope () */
3237 process_die (cu->dies, cu);
3239 /* Some compilers don't define a DW_AT_high_pc attribute for the
3240 compilation unit. If the DW_AT_high_pc is missing, synthesize
3241 it, by scanning the DIE's below the compilation unit. */
3242 get_scope_pc_bounds (cu->dies, &lowpc, &highpc, cu);
3244 symtab = end_symtab (highpc + baseaddr, objfile, SECT_OFF_TEXT (objfile));
3246 /* Set symtab language to language from DW_AT_language.
3247 If the compilation is from a C file generated by language preprocessors,
3248 do not set the language if it was already deduced by start_subfile. */
3250 && !(cu->language == language_c && symtab->language != language_c))
3252 symtab->language = cu->language;
3254 pst->symtab = symtab;
3257 do_cleanups (back_to);
3260 /* Process a die and its children. */
3263 process_die (struct die_info *die, struct dwarf2_cu *cu)
3267 case DW_TAG_padding:
3269 case DW_TAG_compile_unit:
3270 read_file_scope (die, cu);
3272 case DW_TAG_type_unit:
3273 read_type_unit_scope (die, cu);
3275 case DW_TAG_subprogram:
3276 case DW_TAG_inlined_subroutine:
3277 read_func_scope (die, cu);
3279 case DW_TAG_lexical_block:
3280 case DW_TAG_try_block:
3281 case DW_TAG_catch_block:
3282 read_lexical_block_scope (die, cu);
3284 case DW_TAG_class_type:
3285 case DW_TAG_interface_type:
3286 case DW_TAG_structure_type:
3287 case DW_TAG_union_type:
3288 process_structure_scope (die, cu);
3290 case DW_TAG_enumeration_type:
3291 process_enumeration_scope (die, cu);
3294 /* These dies have a type, but processing them does not create
3295 a symbol or recurse to process the children. Therefore we can
3296 read them on-demand through read_type_die. */
3297 case DW_TAG_subroutine_type:
3298 case DW_TAG_set_type:
3299 case DW_TAG_array_type:
3300 case DW_TAG_pointer_type:
3301 case DW_TAG_ptr_to_member_type:
3302 case DW_TAG_reference_type:
3303 case DW_TAG_string_type:
3306 case DW_TAG_base_type:
3307 case DW_TAG_subrange_type:
3308 case DW_TAG_typedef:
3309 /* Add a typedef symbol for the type definition, if it has a
3311 new_symbol (die, read_type_die (die, cu), cu);
3313 case DW_TAG_common_block:
3314 read_common_block (die, cu);
3316 case DW_TAG_common_inclusion:
3318 case DW_TAG_namespace:
3319 processing_has_namespace_info = 1;
3320 read_namespace (die, cu);
3323 read_module (die, cu);
3325 case DW_TAG_imported_declaration:
3326 case DW_TAG_imported_module:
3327 processing_has_namespace_info = 1;
3328 if (die->child != NULL && (die->tag == DW_TAG_imported_declaration
3329 || cu->language != language_fortran))
3330 complaint (&symfile_complaints, _("Tag '%s' has unexpected children"),
3331 dwarf_tag_name (die->tag));
3332 read_import_statement (die, cu);
3335 new_symbol (die, NULL, cu);
3340 /* Return the fully qualified name of DIE, based on its DW_AT_name.
3341 If scope qualifiers are appropriate they will be added. The result
3342 will be allocated on the objfile_obstack, or NULL if the DIE does
3346 dwarf2_full_name (struct die_info *die, struct dwarf2_cu *cu)
3348 struct attribute *attr;
3349 char *prefix, *name;
3350 struct ui_file *buf = NULL;
3352 name = dwarf2_name (die, cu);
3356 /* These are the only languages we know how to qualify names in. */
3357 if (cu->language != language_cplus
3358 && cu->language != language_java)
3361 /* If no prefix is necessary for this type of DIE, return the
3362 unqualified name. The other three tags listed could be handled
3363 in pdi_needs_namespace, but that requires broader changes. */
3364 if (!pdi_needs_namespace (die->tag)
3365 && die->tag != DW_TAG_subprogram
3366 && die->tag != DW_TAG_variable
3367 && die->tag != DW_TAG_member)
3370 prefix = determine_prefix (die, cu);
3371 if (*prefix != '\0')
3372 name = typename_concat (&cu->objfile->objfile_obstack, prefix,
3378 /* Read the import statement specified by the given die and record it. */
3381 read_import_statement (struct die_info *die, struct dwarf2_cu *cu)
3383 struct attribute *import_attr;
3384 struct die_info *imported_die;
3385 struct dwarf2_cu *imported_cu;
3386 const char *imported_name;
3387 const char *imported_name_prefix;
3388 const char *import_prefix;
3389 char *canonical_name;
3391 import_attr = dwarf2_attr (die, DW_AT_import, cu);
3392 if (import_attr == NULL)
3394 complaint (&symfile_complaints, _("Tag '%s' has no DW_AT_import"),
3395 dwarf_tag_name (die->tag));
3400 imported_die = follow_die_ref_or_sig (die, import_attr, &imported_cu);
3401 imported_name = dwarf2_name (imported_die, imported_cu);
3402 if (imported_name == NULL)
3404 /* GCC bug: https://bugzilla.redhat.com/show_bug.cgi?id=506524
3406 The import in the following code:
3420 <2><51>: Abbrev Number: 3 (DW_TAG_imported_declaration)
3421 <52> DW_AT_decl_file : 1
3422 <53> DW_AT_decl_line : 6
3423 <54> DW_AT_import : <0x75>
3424 <2><58>: Abbrev Number: 4 (DW_TAG_typedef)
3426 <5b> DW_AT_decl_file : 1
3427 <5c> DW_AT_decl_line : 2
3428 <5d> DW_AT_type : <0x6e>
3430 <1><75>: Abbrev Number: 7 (DW_TAG_base_type)
3431 <76> DW_AT_byte_size : 4
3432 <77> DW_AT_encoding : 5 (signed)
3434 imports the wrong die ( 0x75 instead of 0x58 ).
3435 This case will be ignored until the gcc bug is fixed. */
3439 /* FIXME: dwarf2_name (die); for the local name after import. */
3441 /* Figure out where the statement is being imported to. */
3442 import_prefix = determine_prefix (die, cu);
3444 /* Figure out what the scope of the imported die is and prepend it
3445 to the name of the imported die. */
3446 imported_name_prefix = determine_prefix (imported_die, imported_cu);
3448 if (strlen (imported_name_prefix) > 0)
3450 canonical_name = alloca (strlen (imported_name_prefix) + 2 + strlen (imported_name) + 1);
3451 strcpy (canonical_name, imported_name_prefix);
3452 strcat (canonical_name, "::");
3453 strcat (canonical_name, imported_name);
3457 canonical_name = alloca (strlen (imported_name) + 1);
3458 strcpy (canonical_name, imported_name);
3461 using_directives = cp_add_using (import_prefix,canonical_name, using_directives);
3465 initialize_cu_func_list (struct dwarf2_cu *cu)
3467 cu->first_fn = cu->last_fn = cu->cached_fn = NULL;
3471 free_cu_line_header (void *arg)
3473 struct dwarf2_cu *cu = arg;
3475 free_line_header (cu->line_header);
3476 cu->line_header = NULL;
3480 read_file_scope (struct die_info *die, struct dwarf2_cu *cu)
3482 struct objfile *objfile = cu->objfile;
3483 struct comp_unit_head *cu_header = &cu->header;
3484 struct cleanup *back_to = make_cleanup (null_cleanup, 0);
3485 CORE_ADDR lowpc = ((CORE_ADDR) -1);
3486 CORE_ADDR highpc = ((CORE_ADDR) 0);
3487 struct attribute *attr;
3489 char *comp_dir = NULL;
3490 struct die_info *child_die;
3491 bfd *abfd = objfile->obfd;
3492 struct line_header *line_header = 0;
3495 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
3497 get_scope_pc_bounds (die, &lowpc, &highpc, cu);
3499 /* If we didn't find a lowpc, set it to highpc to avoid complaints
3500 from finish_block. */
3501 if (lowpc == ((CORE_ADDR) -1))
3506 /* Find the filename. Do not use dwarf2_name here, since the filename
3507 is not a source language identifier. */
3508 attr = dwarf2_attr (die, DW_AT_name, cu);
3511 name = DW_STRING (attr);
3514 attr = dwarf2_attr (die, DW_AT_comp_dir, cu);
3516 comp_dir = DW_STRING (attr);
3517 else if (name != NULL && IS_ABSOLUTE_PATH (name))
3519 comp_dir = ldirname (name);
3520 if (comp_dir != NULL)
3521 make_cleanup (xfree, comp_dir);
3523 if (comp_dir != NULL)
3525 /* Irix 6.2 native cc prepends <machine>.: to the compilation
3526 directory, get rid of it. */
3527 char *cp = strchr (comp_dir, ':');
3529 if (cp && cp != comp_dir && cp[-1] == '.' && cp[1] == '/')
3536 attr = dwarf2_attr (die, DW_AT_language, cu);
3539 set_cu_language (DW_UNSND (attr), cu);
3542 attr = dwarf2_attr (die, DW_AT_producer, cu);
3544 cu->producer = DW_STRING (attr);
3546 /* We assume that we're processing GCC output. */
3547 processing_gcc_compilation = 2;
3549 processing_has_namespace_info = 0;
3551 start_symtab (name, comp_dir, lowpc);
3552 record_debugformat ("DWARF 2");
3553 record_producer (cu->producer);
3555 initialize_cu_func_list (cu);
3557 /* Decode line number information if present. We do this before
3558 processing child DIEs, so that the line header table is available
3559 for DW_AT_decl_file. */
3560 attr = dwarf2_attr (die, DW_AT_stmt_list, cu);
3563 unsigned int line_offset = DW_UNSND (attr);
3564 line_header = dwarf_decode_line_header (line_offset, abfd, cu);
3567 cu->line_header = line_header;
3568 make_cleanup (free_cu_line_header, cu);
3569 dwarf_decode_lines (line_header, comp_dir, abfd, cu, NULL);
3573 /* Process all dies in compilation unit. */
3574 if (die->child != NULL)
3576 child_die = die->child;
3577 while (child_die && child_die->tag)
3579 process_die (child_die, cu);
3580 child_die = sibling_die (child_die);
3584 /* Decode macro information, if present. Dwarf 2 macro information
3585 refers to information in the line number info statement program
3586 header, so we can only read it if we've read the header
3588 attr = dwarf2_attr (die, DW_AT_macro_info, cu);
3589 if (attr && line_header)
3591 unsigned int macro_offset = DW_UNSND (attr);
3592 dwarf_decode_macros (line_header, macro_offset,
3593 comp_dir, abfd, cu);
3595 do_cleanups (back_to);
3598 /* For TUs we want to skip the first top level sibling if it's not the
3599 actual type being defined by this TU. In this case the first top
3600 level sibling is there to provide context only. */
3603 read_type_unit_scope (struct die_info *die, struct dwarf2_cu *cu)
3605 struct objfile *objfile = cu->objfile;
3606 struct cleanup *back_to = make_cleanup (null_cleanup, 0);
3608 struct attribute *attr;
3610 char *comp_dir = NULL;
3611 struct die_info *child_die;
3612 bfd *abfd = objfile->obfd;
3613 struct line_header *line_header = 0;
3615 /* start_symtab needs a low pc, but we don't really have one.
3616 Do what read_file_scope would do in the absence of such info. */
3617 lowpc = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
3619 /* Find the filename. Do not use dwarf2_name here, since the filename
3620 is not a source language identifier. */
3621 attr = dwarf2_attr (die, DW_AT_name, cu);
3623 name = DW_STRING (attr);
3625 attr = dwarf2_attr (die, DW_AT_comp_dir, cu);
3627 comp_dir = DW_STRING (attr);
3628 else if (name != NULL && IS_ABSOLUTE_PATH (name))
3630 comp_dir = ldirname (name);
3631 if (comp_dir != NULL)
3632 make_cleanup (xfree, comp_dir);
3638 attr = dwarf2_attr (die, DW_AT_language, cu);
3640 set_cu_language (DW_UNSND (attr), cu);
3642 /* This isn't technically needed today. It is done for symmetry
3643 with read_file_scope. */
3644 attr = dwarf2_attr (die, DW_AT_producer, cu);
3646 cu->producer = DW_STRING (attr);
3648 /* We assume that we're processing GCC output. */
3649 processing_gcc_compilation = 2;
3651 processing_has_namespace_info = 0;
3653 start_symtab (name, comp_dir, lowpc);
3654 record_debugformat ("DWARF 2");
3655 record_producer (cu->producer);
3657 /* Process the dies in the type unit. */
3658 if (die->child == NULL)
3660 dump_die_for_error (die);
3661 error (_("Dwarf Error: Missing children for type unit [in module %s]"),
3662 bfd_get_filename (abfd));
3665 child_die = die->child;
3667 while (child_die && child_die->tag)
3669 process_die (child_die, cu);
3671 child_die = sibling_die (child_die);
3674 do_cleanups (back_to);
3678 add_to_cu_func_list (const char *name, CORE_ADDR lowpc, CORE_ADDR highpc,
3679 struct dwarf2_cu *cu)
3681 struct function_range *thisfn;
3683 thisfn = (struct function_range *)
3684 obstack_alloc (&cu->comp_unit_obstack, sizeof (struct function_range));
3685 thisfn->name = name;
3686 thisfn->lowpc = lowpc;
3687 thisfn->highpc = highpc;
3688 thisfn->seen_line = 0;
3689 thisfn->next = NULL;
3691 if (cu->last_fn == NULL)
3692 cu->first_fn = thisfn;
3694 cu->last_fn->next = thisfn;
3696 cu->last_fn = thisfn;
3699 /* qsort helper for inherit_abstract_dies. */
3702 unsigned_int_compar (const void *ap, const void *bp)
3704 unsigned int a = *(unsigned int *) ap;
3705 unsigned int b = *(unsigned int *) bp;
3707 return (a > b) - (b > a);
3710 /* DW_AT_abstract_origin inherits whole DIEs (not just their attributes).
3711 Inherit only the children of the DW_AT_abstract_origin DIE not being already
3712 referenced by DW_AT_abstract_origin from the children of the current DIE. */
3715 inherit_abstract_dies (struct die_info *die, struct dwarf2_cu *cu)
3717 struct die_info *child_die;
3718 unsigned die_children_count;
3719 /* CU offsets which were referenced by children of the current DIE. */
3721 unsigned *offsets_end, *offsetp;
3722 /* Parent of DIE - referenced by DW_AT_abstract_origin. */
3723 struct die_info *origin_die;
3724 /* Iterator of the ORIGIN_DIE children. */
3725 struct die_info *origin_child_die;
3726 struct cleanup *cleanups;
3727 struct attribute *attr;
3729 attr = dwarf2_attr (die, DW_AT_abstract_origin, cu);
3733 origin_die = follow_die_ref (die, attr, &cu);
3734 if (die->tag != origin_die->tag
3735 && !(die->tag == DW_TAG_inlined_subroutine
3736 && origin_die->tag == DW_TAG_subprogram))
3737 complaint (&symfile_complaints,
3738 _("DIE 0x%x and its abstract origin 0x%x have different tags"),
3739 die->offset, origin_die->offset);
3741 child_die = die->child;
3742 die_children_count = 0;
3743 while (child_die && child_die->tag)
3745 child_die = sibling_die (child_die);
3746 die_children_count++;
3748 offsets = xmalloc (sizeof (*offsets) * die_children_count);
3749 cleanups = make_cleanup (xfree, offsets);
3751 offsets_end = offsets;
3752 child_die = die->child;
3753 while (child_die && child_die->tag)
3755 /* For each CHILD_DIE, find the corresponding child of
3756 ORIGIN_DIE. If there is more than one layer of
3757 DW_AT_abstract_origin, follow them all; there shouldn't be,
3758 but GCC versions at least through 4.4 generate this (GCC PR
3760 struct die_info *child_origin_die = child_die;
3763 attr = dwarf2_attr (child_origin_die, DW_AT_abstract_origin, cu);
3766 child_origin_die = follow_die_ref (child_origin_die, attr, &cu);
3769 /* According to DWARF3 3.3.8.2 #3 new entries without their abstract
3770 counterpart may exist. */
3771 if (child_origin_die != child_die)
3773 if (child_die->tag != child_origin_die->tag
3774 && !(child_die->tag == DW_TAG_inlined_subroutine
3775 && child_origin_die->tag == DW_TAG_subprogram))
3776 complaint (&symfile_complaints,
3777 _("Child DIE 0x%x and its abstract origin 0x%x have "
3778 "different tags"), child_die->offset,
3779 child_origin_die->offset);
3780 if (child_origin_die->parent != origin_die)
3781 complaint (&symfile_complaints,
3782 _("Child DIE 0x%x and its abstract origin 0x%x have "
3783 "different parents"), child_die->offset,
3784 child_origin_die->offset);
3786 *offsets_end++ = child_origin_die->offset;
3788 child_die = sibling_die (child_die);
3790 qsort (offsets, offsets_end - offsets, sizeof (*offsets),
3791 unsigned_int_compar);
3792 for (offsetp = offsets + 1; offsetp < offsets_end; offsetp++)
3793 if (offsetp[-1] == *offsetp)
3794 complaint (&symfile_complaints, _("Multiple children of DIE 0x%x refer "
3795 "to DIE 0x%x as their abstract origin"),
3796 die->offset, *offsetp);
3799 origin_child_die = origin_die->child;
3800 while (origin_child_die && origin_child_die->tag)
3802 /* Is ORIGIN_CHILD_DIE referenced by any of the DIE children? */
3803 while (offsetp < offsets_end && *offsetp < origin_child_die->offset)
3805 if (offsetp >= offsets_end || *offsetp > origin_child_die->offset)
3807 /* Found that ORIGIN_CHILD_DIE is really not referenced. */
3808 process_die (origin_child_die, cu);
3810 origin_child_die = sibling_die (origin_child_die);
3813 do_cleanups (cleanups);
3817 read_func_scope (struct die_info *die, struct dwarf2_cu *cu)
3819 struct objfile *objfile = cu->objfile;
3820 struct context_stack *new;
3823 struct die_info *child_die;
3824 struct attribute *attr, *call_line, *call_file;
3827 struct block *block;
3828 int inlined_func = (die->tag == DW_TAG_inlined_subroutine);
3832 /* If we do not have call site information, we can't show the
3833 caller of this inlined function. That's too confusing, so
3834 only use the scope for local variables. */
3835 call_line = dwarf2_attr (die, DW_AT_call_line, cu);
3836 call_file = dwarf2_attr (die, DW_AT_call_file, cu);
3837 if (call_line == NULL || call_file == NULL)
3839 read_lexical_block_scope (die, cu);
3844 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
3846 name = dwarf2_linkage_name (die, cu);
3848 /* Ignore functions with missing or empty names and functions with
3849 missing or invalid low and high pc attributes. */
3850 if (name == NULL || !dwarf2_get_pc_bounds (die, &lowpc, &highpc, cu, NULL))
3856 /* Record the function range for dwarf_decode_lines. */
3857 add_to_cu_func_list (name, lowpc, highpc, cu);
3859 new = push_context (0, lowpc);
3860 new->name = new_symbol (die, read_type_die (die, cu), cu);
3862 /* If there is a location expression for DW_AT_frame_base, record
3864 attr = dwarf2_attr (die, DW_AT_frame_base, cu);
3866 /* FIXME: cagney/2004-01-26: The DW_AT_frame_base's location
3867 expression is being recorded directly in the function's symbol
3868 and not in a separate frame-base object. I guess this hack is
3869 to avoid adding some sort of frame-base adjunct/annex to the
3870 function's symbol :-(. The problem with doing this is that it
3871 results in a function symbol with a location expression that
3872 has nothing to do with the location of the function, ouch! The
3873 relationship should be: a function's symbol has-a frame base; a
3874 frame-base has-a location expression. */
3875 dwarf2_symbol_mark_computed (attr, new->name, cu);
3877 cu->list_in_scope = &local_symbols;
3879 if (die->child != NULL)
3881 child_die = die->child;
3882 while (child_die && child_die->tag)
3884 process_die (child_die, cu);
3885 child_die = sibling_die (child_die);
3889 inherit_abstract_dies (die, cu);
3891 new = pop_context ();
3892 /* Make a block for the local symbols within. */
3893 block = finish_block (new->name, &local_symbols, new->old_blocks,
3894 lowpc, highpc, objfile);
3896 /* For C++, set the block's scope. */
3897 if (cu->language == language_cplus)
3898 cp_set_block_scope (new->name, block, &objfile->objfile_obstack,
3899 determine_prefix (die, cu),
3900 processing_has_namespace_info);
3902 /* If we have address ranges, record them. */
3903 dwarf2_record_block_ranges (die, block, baseaddr, cu);
3905 /* In C++, we can have functions nested inside functions (e.g., when
3906 a function declares a class that has methods). This means that
3907 when we finish processing a function scope, we may need to go
3908 back to building a containing block's symbol lists. */
3909 local_symbols = new->locals;
3910 param_symbols = new->params;
3911 using_directives = new->using_directives;
3913 /* If we've finished processing a top-level function, subsequent
3914 symbols go in the file symbol list. */
3915 if (outermost_context_p ())
3916 cu->list_in_scope = &file_symbols;
3919 /* Process all the DIES contained within a lexical block scope. Start
3920 a new scope, process the dies, and then close the scope. */
3923 read_lexical_block_scope (struct die_info *die, struct dwarf2_cu *cu)
3925 struct objfile *objfile = cu->objfile;
3926 struct context_stack *new;
3927 CORE_ADDR lowpc, highpc;
3928 struct die_info *child_die;
3931 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
3933 /* Ignore blocks with missing or invalid low and high pc attributes. */
3934 /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges
3935 as multiple lexical blocks? Handling children in a sane way would
3936 be nasty. Might be easier to properly extend generic blocks to
3938 if (!dwarf2_get_pc_bounds (die, &lowpc, &highpc, cu, NULL))
3943 push_context (0, lowpc);
3944 if (die->child != NULL)
3946 child_die = die->child;
3947 while (child_die && child_die->tag)
3949 process_die (child_die, cu);
3950 child_die = sibling_die (child_die);
3953 new = pop_context ();
3955 if (local_symbols != NULL)
3958 = finish_block (0, &local_symbols, new->old_blocks, new->start_addr,
3961 /* Note that recording ranges after traversing children, as we
3962 do here, means that recording a parent's ranges entails
3963 walking across all its children's ranges as they appear in
3964 the address map, which is quadratic behavior.
3966 It would be nicer to record the parent's ranges before
3967 traversing its children, simply overriding whatever you find
3968 there. But since we don't even decide whether to create a
3969 block until after we've traversed its children, that's hard
3971 dwarf2_record_block_ranges (die, block, baseaddr, cu);
3973 local_symbols = new->locals;
3974 using_directives = new->using_directives;
3977 /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET.
3978 Return 1 if the attributes are present and valid, otherwise, return 0.
3979 If RANGES_PST is not NULL we should setup `objfile->psymtabs_addrmap'. */
3982 dwarf2_ranges_read (unsigned offset, CORE_ADDR *low_return,
3983 CORE_ADDR *high_return, struct dwarf2_cu *cu,
3984 struct partial_symtab *ranges_pst)
3986 struct objfile *objfile = cu->objfile;
3987 struct comp_unit_head *cu_header = &cu->header;
3988 bfd *obfd = objfile->obfd;
3989 unsigned int addr_size = cu_header->addr_size;
3990 CORE_ADDR mask = ~(~(CORE_ADDR)1 << (addr_size * 8 - 1));
3991 /* Base address selection entry. */
4002 found_base = cu->base_known;
4003 base = cu->base_address;
4005 if (offset >= dwarf2_per_objfile->ranges.size)
4007 complaint (&symfile_complaints,
4008 _("Offset %d out of bounds for DW_AT_ranges attribute"),
4012 buffer = dwarf2_per_objfile->ranges.buffer + offset;
4014 /* Read in the largest possible address. */
4015 marker = read_address (obfd, buffer, cu, &dummy);
4016 if ((marker & mask) == mask)
4018 /* If we found the largest possible address, then
4019 read the base address. */
4020 base = read_address (obfd, buffer + addr_size, cu, &dummy);
4021 buffer += 2 * addr_size;
4022 offset += 2 * addr_size;
4028 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
4032 CORE_ADDR range_beginning, range_end;
4034 range_beginning = read_address (obfd, buffer, cu, &dummy);
4035 buffer += addr_size;
4036 range_end = read_address (obfd, buffer, cu, &dummy);
4037 buffer += addr_size;
4038 offset += 2 * addr_size;
4040 /* An end of list marker is a pair of zero addresses. */
4041 if (range_beginning == 0 && range_end == 0)
4042 /* Found the end of list entry. */
4045 /* Each base address selection entry is a pair of 2 values.
4046 The first is the largest possible address, the second is
4047 the base address. Check for a base address here. */
4048 if ((range_beginning & mask) == mask)
4050 /* If we found the largest possible address, then
4051 read the base address. */
4052 base = read_address (obfd, buffer + addr_size, cu, &dummy);
4059 /* We have no valid base address for the ranges
4061 complaint (&symfile_complaints,
4062 _("Invalid .debug_ranges data (no base address)"));
4066 range_beginning += base;
4069 if (ranges_pst != NULL && range_beginning < range_end)
4070 addrmap_set_empty (objfile->psymtabs_addrmap,
4071 range_beginning + baseaddr, range_end - 1 + baseaddr,
4074 /* FIXME: This is recording everything as a low-high
4075 segment of consecutive addresses. We should have a
4076 data structure for discontiguous block ranges
4080 low = range_beginning;
4086 if (range_beginning < low)
4087 low = range_beginning;
4088 if (range_end > high)
4094 /* If the first entry is an end-of-list marker, the range
4095 describes an empty scope, i.e. no instructions. */
4101 *high_return = high;
4105 /* Get low and high pc attributes from a die. Return 1 if the attributes
4106 are present and valid, otherwise, return 0. Return -1 if the range is
4107 discontinuous, i.e. derived from DW_AT_ranges information. */
4109 dwarf2_get_pc_bounds (struct die_info *die, CORE_ADDR *lowpc,
4110 CORE_ADDR *highpc, struct dwarf2_cu *cu,
4111 struct partial_symtab *pst)
4113 struct attribute *attr;
4118 attr = dwarf2_attr (die, DW_AT_high_pc, cu);
4121 high = DW_ADDR (attr);
4122 attr = dwarf2_attr (die, DW_AT_low_pc, cu);
4124 low = DW_ADDR (attr);
4126 /* Found high w/o low attribute. */
4129 /* Found consecutive range of addresses. */
4134 attr = dwarf2_attr (die, DW_AT_ranges, cu);
4137 /* Value of the DW_AT_ranges attribute is the offset in the
4138 .debug_ranges section. */
4139 if (!dwarf2_ranges_read (DW_UNSND (attr), &low, &high, cu, pst))
4141 /* Found discontinuous range of addresses. */
4149 /* When using the GNU linker, .gnu.linkonce. sections are used to
4150 eliminate duplicate copies of functions and vtables and such.
4151 The linker will arbitrarily choose one and discard the others.
4152 The AT_*_pc values for such functions refer to local labels in
4153 these sections. If the section from that file was discarded, the
4154 labels are not in the output, so the relocs get a value of 0.
4155 If this is a discarded function, mark the pc bounds as invalid,
4156 so that GDB will ignore it. */
4157 if (low == 0 && !dwarf2_per_objfile->has_section_at_zero)
4165 /* Assuming that DIE represents a subprogram DIE or a lexical block, get
4166 its low and high PC addresses. Do nothing if these addresses could not
4167 be determined. Otherwise, set LOWPC to the low address if it is smaller,
4168 and HIGHPC to the high address if greater than HIGHPC. */
4171 dwarf2_get_subprogram_pc_bounds (struct die_info *die,
4172 CORE_ADDR *lowpc, CORE_ADDR *highpc,
4173 struct dwarf2_cu *cu)
4175 CORE_ADDR low, high;
4176 struct die_info *child = die->child;
4178 if (dwarf2_get_pc_bounds (die, &low, &high, cu, NULL))
4180 *lowpc = min (*lowpc, low);
4181 *highpc = max (*highpc, high);
4184 /* If the language does not allow nested subprograms (either inside
4185 subprograms or lexical blocks), we're done. */
4186 if (cu->language != language_ada)
4189 /* Check all the children of the given DIE. If it contains nested
4190 subprograms, then check their pc bounds. Likewise, we need to
4191 check lexical blocks as well, as they may also contain subprogram
4193 while (child && child->tag)
4195 if (child->tag == DW_TAG_subprogram
4196 || child->tag == DW_TAG_lexical_block)
4197 dwarf2_get_subprogram_pc_bounds (child, lowpc, highpc, cu);
4198 child = sibling_die (child);
4202 /* Get the low and high pc's represented by the scope DIE, and store
4203 them in *LOWPC and *HIGHPC. If the correct values can't be
4204 determined, set *LOWPC to -1 and *HIGHPC to 0. */
4207 get_scope_pc_bounds (struct die_info *die,
4208 CORE_ADDR *lowpc, CORE_ADDR *highpc,
4209 struct dwarf2_cu *cu)
4211 CORE_ADDR best_low = (CORE_ADDR) -1;
4212 CORE_ADDR best_high = (CORE_ADDR) 0;
4213 CORE_ADDR current_low, current_high;
4215 if (dwarf2_get_pc_bounds (die, ¤t_low, ¤t_high, cu, NULL))
4217 best_low = current_low;
4218 best_high = current_high;
4222 struct die_info *child = die->child;
4224 while (child && child->tag)
4226 switch (child->tag) {
4227 case DW_TAG_subprogram:
4228 dwarf2_get_subprogram_pc_bounds (child, &best_low, &best_high, cu);
4230 case DW_TAG_namespace:
4231 /* FIXME: carlton/2004-01-16: Should we do this for
4232 DW_TAG_class_type/DW_TAG_structure_type, too? I think
4233 that current GCC's always emit the DIEs corresponding
4234 to definitions of methods of classes as children of a
4235 DW_TAG_compile_unit or DW_TAG_namespace (as opposed to
4236 the DIEs giving the declarations, which could be
4237 anywhere). But I don't see any reason why the
4238 standards says that they have to be there. */
4239 get_scope_pc_bounds (child, ¤t_low, ¤t_high, cu);
4241 if (current_low != ((CORE_ADDR) -1))
4243 best_low = min (best_low, current_low);
4244 best_high = max (best_high, current_high);
4252 child = sibling_die (child);
4257 *highpc = best_high;
4260 /* Record the address ranges for BLOCK, offset by BASEADDR, as given
4263 dwarf2_record_block_ranges (struct die_info *die, struct block *block,
4264 CORE_ADDR baseaddr, struct dwarf2_cu *cu)
4266 struct attribute *attr;
4268 attr = dwarf2_attr (die, DW_AT_high_pc, cu);
4271 CORE_ADDR high = DW_ADDR (attr);
4272 attr = dwarf2_attr (die, DW_AT_low_pc, cu);
4275 CORE_ADDR low = DW_ADDR (attr);
4276 record_block_range (block, baseaddr + low, baseaddr + high - 1);
4280 attr = dwarf2_attr (die, DW_AT_ranges, cu);
4283 bfd *obfd = cu->objfile->obfd;
4285 /* The value of the DW_AT_ranges attribute is the offset of the
4286 address range list in the .debug_ranges section. */
4287 unsigned long offset = DW_UNSND (attr);
4288 gdb_byte *buffer = dwarf2_per_objfile->ranges.buffer + offset;
4290 /* For some target architectures, but not others, the
4291 read_address function sign-extends the addresses it returns.
4292 To recognize base address selection entries, we need a
4294 unsigned int addr_size = cu->header.addr_size;
4295 CORE_ADDR base_select_mask = ~(~(CORE_ADDR)1 << (addr_size * 8 - 1));
4297 /* The base address, to which the next pair is relative. Note
4298 that this 'base' is a DWARF concept: most entries in a range
4299 list are relative, to reduce the number of relocs against the
4300 debugging information. This is separate from this function's
4301 'baseaddr' argument, which GDB uses to relocate debugging
4302 information from a shared library based on the address at
4303 which the library was loaded. */
4304 CORE_ADDR base = cu->base_address;
4305 int base_known = cu->base_known;
4307 if (offset >= dwarf2_per_objfile->ranges.size)
4309 complaint (&symfile_complaints,
4310 _("Offset %lu out of bounds for DW_AT_ranges attribute"),
4317 unsigned int bytes_read;
4318 CORE_ADDR start, end;
4320 start = read_address (obfd, buffer, cu, &bytes_read);
4321 buffer += bytes_read;
4322 end = read_address (obfd, buffer, cu, &bytes_read);
4323 buffer += bytes_read;
4325 /* Did we find the end of the range list? */
4326 if (start == 0 && end == 0)
4329 /* Did we find a base address selection entry? */
4330 else if ((start & base_select_mask) == base_select_mask)
4336 /* We found an ordinary address range. */
4341 complaint (&symfile_complaints,
4342 _("Invalid .debug_ranges data (no base address)"));
4346 record_block_range (block,
4347 baseaddr + base + start,
4348 baseaddr + base + end - 1);
4354 /* Add an aggregate field to the field list. */
4357 dwarf2_add_field (struct field_info *fip, struct die_info *die,
4358 struct dwarf2_cu *cu)
4360 struct objfile *objfile = cu->objfile;
4361 struct gdbarch *gdbarch = get_objfile_arch (objfile);
4362 struct nextfield *new_field;
4363 struct attribute *attr;
4365 char *fieldname = "";
4367 /* Allocate a new field list entry and link it in. */
4368 new_field = (struct nextfield *) xmalloc (sizeof (struct nextfield));
4369 make_cleanup (xfree, new_field);
4370 memset (new_field, 0, sizeof (struct nextfield));
4372 if (die->tag == DW_TAG_inheritance)
4374 new_field->next = fip->baseclasses;
4375 fip->baseclasses = new_field;
4379 new_field->next = fip->fields;
4380 fip->fields = new_field;
4384 /* Handle accessibility and virtuality of field.
4385 The default accessibility for members is public, the default
4386 accessibility for inheritance is private. */
4387 if (die->tag != DW_TAG_inheritance)
4388 new_field->accessibility = DW_ACCESS_public;
4390 new_field->accessibility = DW_ACCESS_private;
4391 new_field->virtuality = DW_VIRTUALITY_none;
4393 attr = dwarf2_attr (die, DW_AT_accessibility, cu);
4395 new_field->accessibility = DW_UNSND (attr);
4396 if (new_field->accessibility != DW_ACCESS_public)
4397 fip->non_public_fields = 1;
4398 attr = dwarf2_attr (die, DW_AT_virtuality, cu);
4400 new_field->virtuality = DW_UNSND (attr);
4402 fp = &new_field->field;
4404 if (die->tag == DW_TAG_member && ! die_is_declaration (die, cu))
4406 /* Data member other than a C++ static data member. */
4408 /* Get type of field. */
4409 fp->type = die_type (die, cu);
4411 SET_FIELD_BITPOS (*fp, 0);
4413 /* Get bit size of field (zero if none). */
4414 attr = dwarf2_attr (die, DW_AT_bit_size, cu);
4417 FIELD_BITSIZE (*fp) = DW_UNSND (attr);
4421 FIELD_BITSIZE (*fp) = 0;
4424 /* Get bit offset of field. */
4425 attr = dwarf2_attr (die, DW_AT_data_member_location, cu);
4428 int byte_offset = 0;
4430 if (attr_form_is_section_offset (attr))
4431 dwarf2_complex_location_expr_complaint ();
4432 else if (attr_form_is_constant (attr))
4433 byte_offset = dwarf2_get_attr_constant_value (attr, 0);
4434 else if (attr_form_is_block (attr))
4435 byte_offset = decode_locdesc (DW_BLOCK (attr), cu);
4437 dwarf2_complex_location_expr_complaint ();
4439 SET_FIELD_BITPOS (*fp, byte_offset * bits_per_byte);
4441 attr = dwarf2_attr (die, DW_AT_bit_offset, cu);
4444 if (gdbarch_bits_big_endian (gdbarch))
4446 /* For big endian bits, the DW_AT_bit_offset gives the
4447 additional bit offset from the MSB of the containing
4448 anonymous object to the MSB of the field. We don't
4449 have to do anything special since we don't need to
4450 know the size of the anonymous object. */
4451 FIELD_BITPOS (*fp) += DW_UNSND (attr);
4455 /* For little endian bits, compute the bit offset to the
4456 MSB of the anonymous object, subtract off the number of
4457 bits from the MSB of the field to the MSB of the
4458 object, and then subtract off the number of bits of
4459 the field itself. The result is the bit offset of
4460 the LSB of the field. */
4462 int bit_offset = DW_UNSND (attr);
4464 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
4467 /* The size of the anonymous object containing
4468 the bit field is explicit, so use the
4469 indicated size (in bytes). */
4470 anonymous_size = DW_UNSND (attr);
4474 /* The size of the anonymous object containing
4475 the bit field must be inferred from the type
4476 attribute of the data member containing the
4478 anonymous_size = TYPE_LENGTH (fp->type);
4480 FIELD_BITPOS (*fp) += anonymous_size * bits_per_byte
4481 - bit_offset - FIELD_BITSIZE (*fp);
4485 /* Get name of field. */
4486 fieldname = dwarf2_name (die, cu);
4487 if (fieldname == NULL)
4490 /* The name is already allocated along with this objfile, so we don't
4491 need to duplicate it for the type. */
4492 fp->name = fieldname;
4494 /* Change accessibility for artificial fields (e.g. virtual table
4495 pointer or virtual base class pointer) to private. */
4496 if (dwarf2_attr (die, DW_AT_artificial, cu))
4498 FIELD_ARTIFICIAL (*fp) = 1;
4499 new_field->accessibility = DW_ACCESS_private;
4500 fip->non_public_fields = 1;
4503 else if (die->tag == DW_TAG_member || die->tag == DW_TAG_variable)
4505 /* C++ static member. */
4507 /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that
4508 is a declaration, but all versions of G++ as of this writing
4509 (so through at least 3.2.1) incorrectly generate
4510 DW_TAG_variable tags. */
4514 /* Get name of field. */
4515 fieldname = dwarf2_name (die, cu);
4516 if (fieldname == NULL)
4519 /* Get physical name. */
4520 physname = dwarf2_linkage_name (die, cu);
4522 /* The name is already allocated along with this objfile, so we don't
4523 need to duplicate it for the type. */
4524 SET_FIELD_PHYSNAME (*fp, physname ? physname : "");
4525 FIELD_TYPE (*fp) = die_type (die, cu);
4526 FIELD_NAME (*fp) = fieldname;
4528 else if (die->tag == DW_TAG_inheritance)
4530 /* C++ base class field. */
4531 attr = dwarf2_attr (die, DW_AT_data_member_location, cu);
4534 int byte_offset = 0;
4536 if (attr_form_is_section_offset (attr))
4537 dwarf2_complex_location_expr_complaint ();
4538 else if (attr_form_is_constant (attr))
4539 byte_offset = dwarf2_get_attr_constant_value (attr, 0);
4540 else if (attr_form_is_block (attr))
4541 byte_offset = decode_locdesc (DW_BLOCK (attr), cu);
4543 dwarf2_complex_location_expr_complaint ();
4545 SET_FIELD_BITPOS (*fp, byte_offset * bits_per_byte);
4547 FIELD_BITSIZE (*fp) = 0;
4548 FIELD_TYPE (*fp) = die_type (die, cu);
4549 FIELD_NAME (*fp) = type_name_no_tag (fp->type);
4550 fip->nbaseclasses++;
4554 /* Create the vector of fields, and attach it to the type. */
4557 dwarf2_attach_fields_to_type (struct field_info *fip, struct type *type,
4558 struct dwarf2_cu *cu)
4560 int nfields = fip->nfields;
4562 /* Record the field count, allocate space for the array of fields,
4563 and create blank accessibility bitfields if necessary. */
4564 TYPE_NFIELDS (type) = nfields;
4565 TYPE_FIELDS (type) = (struct field *)
4566 TYPE_ALLOC (type, sizeof (struct field) * nfields);
4567 memset (TYPE_FIELDS (type), 0, sizeof (struct field) * nfields);
4569 if (fip->non_public_fields && cu->language != language_ada)
4571 ALLOCATE_CPLUS_STRUCT_TYPE (type);
4573 TYPE_FIELD_PRIVATE_BITS (type) =
4574 (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields));
4575 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type), nfields);
4577 TYPE_FIELD_PROTECTED_BITS (type) =
4578 (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields));
4579 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type), nfields);
4581 TYPE_FIELD_IGNORE_BITS (type) =
4582 (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields));
4583 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type), nfields);
4586 /* If the type has baseclasses, allocate and clear a bit vector for
4587 TYPE_FIELD_VIRTUAL_BITS. */
4588 if (fip->nbaseclasses && cu->language != language_ada)
4590 int num_bytes = B_BYTES (fip->nbaseclasses);
4591 unsigned char *pointer;
4593 ALLOCATE_CPLUS_STRUCT_TYPE (type);
4594 pointer = TYPE_ALLOC (type, num_bytes);
4595 TYPE_FIELD_VIRTUAL_BITS (type) = pointer;
4596 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type), fip->nbaseclasses);
4597 TYPE_N_BASECLASSES (type) = fip->nbaseclasses;
4600 /* Copy the saved-up fields into the field vector. Start from the head
4601 of the list, adding to the tail of the field array, so that they end
4602 up in the same order in the array in which they were added to the list. */
4603 while (nfields-- > 0)
4605 struct nextfield *fieldp;
4609 fieldp = fip->fields;
4610 fip->fields = fieldp->next;
4614 fieldp = fip->baseclasses;
4615 fip->baseclasses = fieldp->next;
4618 TYPE_FIELD (type, nfields) = fieldp->field;
4619 switch (fieldp->accessibility)
4621 case DW_ACCESS_private:
4622 if (cu->language != language_ada)
4623 SET_TYPE_FIELD_PRIVATE (type, nfields);
4626 case DW_ACCESS_protected:
4627 if (cu->language != language_ada)
4628 SET_TYPE_FIELD_PROTECTED (type, nfields);
4631 case DW_ACCESS_public:
4635 /* Unknown accessibility. Complain and treat it as public. */
4637 complaint (&symfile_complaints, _("unsupported accessibility %d"),
4638 fieldp->accessibility);
4642 if (nfields < fip->nbaseclasses)
4644 switch (fieldp->virtuality)
4646 case DW_VIRTUALITY_virtual:
4647 case DW_VIRTUALITY_pure_virtual:
4648 if (cu->language == language_ada)
4649 error ("unexpected virtuality in component of Ada type");
4650 SET_TYPE_FIELD_VIRTUAL (type, nfields);
4657 /* Add a member function to the proper fieldlist. */
4660 dwarf2_add_member_fn (struct field_info *fip, struct die_info *die,
4661 struct type *type, struct dwarf2_cu *cu)
4663 struct objfile *objfile = cu->objfile;
4664 struct attribute *attr;
4665 struct fnfieldlist *flp;
4667 struct fn_field *fnp;
4670 struct nextfnfield *new_fnfield;
4671 struct type *this_type;
4673 if (cu->language == language_ada)
4674 error ("unexpected member function in Ada type");
4676 /* Get name of member function. */
4677 fieldname = dwarf2_name (die, cu);
4678 if (fieldname == NULL)
4681 /* Get the mangled name. */
4682 physname = dwarf2_linkage_name (die, cu);
4684 /* Look up member function name in fieldlist. */
4685 for (i = 0; i < fip->nfnfields; i++)
4687 if (strcmp (fip->fnfieldlists[i].name, fieldname) == 0)
4691 /* Create new list element if necessary. */
4692 if (i < fip->nfnfields)
4693 flp = &fip->fnfieldlists[i];
4696 if ((fip->nfnfields % DW_FIELD_ALLOC_CHUNK) == 0)
4698 fip->fnfieldlists = (struct fnfieldlist *)
4699 xrealloc (fip->fnfieldlists,
4700 (fip->nfnfields + DW_FIELD_ALLOC_CHUNK)
4701 * sizeof (struct fnfieldlist));
4702 if (fip->nfnfields == 0)
4703 make_cleanup (free_current_contents, &fip->fnfieldlists);
4705 flp = &fip->fnfieldlists[fip->nfnfields];
4706 flp->name = fieldname;
4712 /* Create a new member function field and chain it to the field list
4714 new_fnfield = (struct nextfnfield *) xmalloc (sizeof (struct nextfnfield));
4715 make_cleanup (xfree, new_fnfield);
4716 memset (new_fnfield, 0, sizeof (struct nextfnfield));
4717 new_fnfield->next = flp->head;
4718 flp->head = new_fnfield;
4721 /* Fill in the member function field info. */
4722 fnp = &new_fnfield->fnfield;
4723 /* The name is already allocated along with this objfile, so we don't
4724 need to duplicate it for the type. */
4725 fnp->physname = physname ? physname : "";
4726 fnp->type = alloc_type (objfile);
4727 this_type = read_type_die (die, cu);
4728 if (this_type && TYPE_CODE (this_type) == TYPE_CODE_FUNC)
4730 int nparams = TYPE_NFIELDS (this_type);
4732 /* TYPE is the domain of this method, and THIS_TYPE is the type
4733 of the method itself (TYPE_CODE_METHOD). */
4734 smash_to_method_type (fnp->type, type,
4735 TYPE_TARGET_TYPE (this_type),
4736 TYPE_FIELDS (this_type),
4737 TYPE_NFIELDS (this_type),
4738 TYPE_VARARGS (this_type));
4740 /* Handle static member functions.
4741 Dwarf2 has no clean way to discern C++ static and non-static
4742 member functions. G++ helps GDB by marking the first
4743 parameter for non-static member functions (which is the
4744 this pointer) as artificial. We obtain this information
4745 from read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */
4746 if (nparams == 0 || TYPE_FIELD_ARTIFICIAL (this_type, 0) == 0)
4747 fnp->voffset = VOFFSET_STATIC;
4750 complaint (&symfile_complaints, _("member function type missing for '%s'"),
4753 /* Get fcontext from DW_AT_containing_type if present. */
4754 if (dwarf2_attr (die, DW_AT_containing_type, cu) != NULL)
4755 fnp->fcontext = die_containing_type (die, cu);
4757 /* dwarf2 doesn't have stubbed physical names, so the setting of is_const
4758 and is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */
4760 /* Get accessibility. */
4761 attr = dwarf2_attr (die, DW_AT_accessibility, cu);
4764 switch (DW_UNSND (attr))
4766 case DW_ACCESS_private:
4767 fnp->is_private = 1;
4769 case DW_ACCESS_protected:
4770 fnp->is_protected = 1;
4775 /* Check for artificial methods. */
4776 attr = dwarf2_attr (die, DW_AT_artificial, cu);
4777 if (attr && DW_UNSND (attr) != 0)
4778 fnp->is_artificial = 1;
4780 /* Get index in virtual function table if it is a virtual member
4781 function. For GCC, this is an offset in the appropriate
4782 virtual table, as specified by DW_AT_containing_type. For
4783 everyone else, it is an expression to be evaluated relative
4784 to the object address. */
4786 attr = dwarf2_attr (die, DW_AT_vtable_elem_location, cu);
4787 if (attr && fnp->fcontext)
4789 /* Support the .debug_loc offsets */
4790 if (attr_form_is_block (attr))
4792 fnp->voffset = decode_locdesc (DW_BLOCK (attr), cu) + 2;
4794 else if (attr_form_is_section_offset (attr))
4796 dwarf2_complex_location_expr_complaint ();
4800 dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location",
4806 /* We only support trivial expressions here. This hack will work
4807 for v3 classes, which always start with the vtable pointer. */
4808 if (attr_form_is_block (attr) && DW_BLOCK (attr)->size > 0
4809 && DW_BLOCK (attr)->data[0] == DW_OP_deref)
4811 struct dwarf_block blk;
4812 blk.size = DW_BLOCK (attr)->size - 1;
4813 blk.data = DW_BLOCK (attr)->data + 1;
4814 fnp->voffset = decode_locdesc (&blk, cu);
4815 if ((fnp->voffset % cu->header.addr_size) != 0)
4816 dwarf2_complex_location_expr_complaint ();
4818 fnp->voffset /= cu->header.addr_size;
4820 fnp->fcontext = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (this_type, 0));
4823 dwarf2_complex_location_expr_complaint ();
4827 attr = dwarf2_attr (die, DW_AT_virtuality, cu);
4828 if (attr && DW_UNSND (attr))
4830 /* GCC does this, as of 2008-08-25; PR debug/37237. */
4831 complaint (&symfile_complaints,
4832 _("Member function \"%s\" (offset %d) is virtual but the vtable offset is not specified"),
4833 fieldname, die->offset);
4834 TYPE_CPLUS_DYNAMIC (type) = 1;
4839 /* Create the vector of member function fields, and attach it to the type. */
4842 dwarf2_attach_fn_fields_to_type (struct field_info *fip, struct type *type,
4843 struct dwarf2_cu *cu)
4845 struct fnfieldlist *flp;
4846 int total_length = 0;
4849 if (cu->language == language_ada)
4850 error ("unexpected member functions in Ada type");
4852 ALLOCATE_CPLUS_STRUCT_TYPE (type);
4853 TYPE_FN_FIELDLISTS (type) = (struct fn_fieldlist *)
4854 TYPE_ALLOC (type, sizeof (struct fn_fieldlist) * fip->nfnfields);
4856 for (i = 0, flp = fip->fnfieldlists; i < fip->nfnfields; i++, flp++)
4858 struct nextfnfield *nfp = flp->head;
4859 struct fn_fieldlist *fn_flp = &TYPE_FN_FIELDLIST (type, i);
4862 TYPE_FN_FIELDLIST_NAME (type, i) = flp->name;
4863 TYPE_FN_FIELDLIST_LENGTH (type, i) = flp->length;
4864 fn_flp->fn_fields = (struct fn_field *)
4865 TYPE_ALLOC (type, sizeof (struct fn_field) * flp->length);
4866 for (k = flp->length; (k--, nfp); nfp = nfp->next)
4867 fn_flp->fn_fields[k] = nfp->fnfield;
4869 total_length += flp->length;
4872 TYPE_NFN_FIELDS (type) = fip->nfnfields;
4873 TYPE_NFN_FIELDS_TOTAL (type) = total_length;
4876 /* Returns non-zero if NAME is the name of a vtable member in CU's
4877 language, zero otherwise. */
4879 is_vtable_name (const char *name, struct dwarf2_cu *cu)
4881 static const char vptr[] = "_vptr";
4882 static const char vtable[] = "vtable";
4884 /* Look for the C++ and Java forms of the vtable. */
4885 if ((cu->language == language_java
4886 && strncmp (name, vtable, sizeof (vtable) - 1) == 0)
4887 || (strncmp (name, vptr, sizeof (vptr) - 1) == 0
4888 && is_cplus_marker (name[sizeof (vptr) - 1])))
4894 /* GCC outputs unnamed structures that are really pointers to member
4895 functions, with the ABI-specified layout. If DIE (from CU) describes
4896 such a structure, set its type, and return nonzero. Otherwise return
4899 GCC shouldn't do this; it should just output pointer to member DIEs.
4900 This is GCC PR debug/28767. */
4902 static struct type *
4903 quirk_gcc_member_function_pointer (struct die_info *die, struct dwarf2_cu *cu)
4905 struct objfile *objfile = cu->objfile;
4907 struct die_info *pfn_die, *delta_die;
4908 struct attribute *pfn_name, *delta_name;
4909 struct type *pfn_type, *domain_type;
4911 /* Check for a structure with no name and two children. */
4912 if (die->tag != DW_TAG_structure_type
4913 || dwarf2_attr (die, DW_AT_name, cu) != NULL
4914 || die->child == NULL
4915 || die->child->sibling == NULL
4916 || (die->child->sibling->sibling != NULL
4917 && die->child->sibling->sibling->tag != DW_TAG_padding))
4920 /* Check for __pfn and __delta members. */
4921 pfn_die = die->child;
4922 pfn_name = dwarf2_attr (pfn_die, DW_AT_name, cu);
4923 if (pfn_die->tag != DW_TAG_member
4925 || DW_STRING (pfn_name) == NULL
4926 || strcmp ("__pfn", DW_STRING (pfn_name)) != 0)
4929 delta_die = pfn_die->sibling;
4930 delta_name = dwarf2_attr (delta_die, DW_AT_name, cu);
4931 if (delta_die->tag != DW_TAG_member
4932 || delta_name == NULL
4933 || DW_STRING (delta_name) == NULL
4934 || strcmp ("__delta", DW_STRING (delta_name)) != 0)
4937 /* Find the type of the method. */
4938 pfn_type = die_type (pfn_die, cu);
4939 if (pfn_type == NULL
4940 || TYPE_CODE (pfn_type) != TYPE_CODE_PTR
4941 || TYPE_CODE (TYPE_TARGET_TYPE (pfn_type)) != TYPE_CODE_FUNC)
4944 /* Look for the "this" argument. */
4945 pfn_type = TYPE_TARGET_TYPE (pfn_type);
4946 if (TYPE_NFIELDS (pfn_type) == 0
4947 || TYPE_CODE (TYPE_FIELD_TYPE (pfn_type, 0)) != TYPE_CODE_PTR)
4950 domain_type = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type, 0));
4951 type = alloc_type (objfile);
4952 smash_to_method_type (type, domain_type, TYPE_TARGET_TYPE (pfn_type),
4953 TYPE_FIELDS (pfn_type), TYPE_NFIELDS (pfn_type),
4954 TYPE_VARARGS (pfn_type));
4955 type = lookup_methodptr_type (type);
4956 return set_die_type (die, type, cu);
4959 /* Called when we find the DIE that starts a structure or union scope
4960 (definition) to process all dies that define the members of the
4963 NOTE: we need to call struct_type regardless of whether or not the
4964 DIE has an at_name attribute, since it might be an anonymous
4965 structure or union. This gets the type entered into our set of
4968 However, if the structure is incomplete (an opaque struct/union)
4969 then suppress creating a symbol table entry for it since gdb only
4970 wants to find the one with the complete definition. Note that if
4971 it is complete, we just call new_symbol, which does it's own
4972 checking about whether the struct/union is anonymous or not (and
4973 suppresses creating a symbol table entry itself). */
4975 static struct type *
4976 read_structure_type (struct die_info *die, struct dwarf2_cu *cu)
4978 struct objfile *objfile = cu->objfile;
4980 struct attribute *attr;
4982 struct cleanup *back_to = make_cleanup (null_cleanup, 0);
4984 type = quirk_gcc_member_function_pointer (die, cu);
4988 /* If the definition of this type lives in .debug_types, read that type.
4989 Don't follow DW_AT_specification though, that will take us back up
4990 the chain and we want to go down. */
4991 attr = dwarf2_attr_no_follow (die, DW_AT_signature, cu);
4994 struct dwarf2_cu *type_cu = cu;
4995 struct die_info *type_die = follow_die_ref_or_sig (die, attr, &type_cu);
4996 /* We could just recurse on read_structure_type, but we need to call
4997 get_die_type to ensure only one type for this DIE is created.
4998 This is important, for example, because for c++ classes we need
4999 TYPE_NAME set which is only done by new_symbol. Blech. */
5000 type = read_type_die (type_die, type_cu);
5001 return set_die_type (die, type, cu);
5004 type = alloc_type (objfile);
5005 INIT_CPLUS_SPECIFIC (type);
5007 name = dwarf2_name (die, cu);
5010 if (cu->language == language_cplus
5011 || cu->language == language_java)
5013 const char *new_prefix = determine_class_name (die, cu);
5014 TYPE_TAG_NAME (type) = (char *) new_prefix;
5018 /* The name is already allocated along with this objfile, so
5019 we don't need to duplicate it for the type. */
5020 TYPE_TAG_NAME (type) = name;
5024 if (die->tag == DW_TAG_structure_type)
5026 TYPE_CODE (type) = TYPE_CODE_STRUCT;
5028 else if (die->tag == DW_TAG_union_type)
5030 TYPE_CODE (type) = TYPE_CODE_UNION;
5034 /* FIXME: TYPE_CODE_CLASS is currently defined to TYPE_CODE_STRUCT
5036 TYPE_CODE (type) = TYPE_CODE_CLASS;
5039 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
5042 TYPE_LENGTH (type) = DW_UNSND (attr);
5046 TYPE_LENGTH (type) = 0;
5049 TYPE_STUB_SUPPORTED (type) = 1;
5050 if (die_is_declaration (die, cu))
5051 TYPE_STUB (type) = 1;
5053 set_descriptive_type (type, die, cu);
5055 /* We need to add the type field to the die immediately so we don't
5056 infinitely recurse when dealing with pointers to the structure
5057 type within the structure itself. */
5058 set_die_type (die, type, cu);
5060 if (die->child != NULL && ! die_is_declaration (die, cu))
5062 struct field_info fi;
5063 struct die_info *child_die;
5065 memset (&fi, 0, sizeof (struct field_info));
5067 child_die = die->child;
5069 while (child_die && child_die->tag)
5071 if (child_die->tag == DW_TAG_member
5072 || child_die->tag == DW_TAG_variable)
5074 /* NOTE: carlton/2002-11-05: A C++ static data member
5075 should be a DW_TAG_member that is a declaration, but
5076 all versions of G++ as of this writing (so through at
5077 least 3.2.1) incorrectly generate DW_TAG_variable
5078 tags for them instead. */
5079 dwarf2_add_field (&fi, child_die, cu);
5081 else if (child_die->tag == DW_TAG_subprogram)
5083 /* C++ member function. */
5084 dwarf2_add_member_fn (&fi, child_die, type, cu);
5086 else if (child_die->tag == DW_TAG_inheritance)
5088 /* C++ base class field. */
5089 dwarf2_add_field (&fi, child_die, cu);
5091 child_die = sibling_die (child_die);
5094 /* Attach fields and member functions to the type. */
5096 dwarf2_attach_fields_to_type (&fi, type, cu);
5099 dwarf2_attach_fn_fields_to_type (&fi, type, cu);
5101 /* Get the type which refers to the base class (possibly this
5102 class itself) which contains the vtable pointer for the current
5103 class from the DW_AT_containing_type attribute. This use of
5104 DW_AT_containing_type is a GNU extension. */
5106 if (dwarf2_attr (die, DW_AT_containing_type, cu) != NULL)
5108 struct type *t = die_containing_type (die, cu);
5110 TYPE_VPTR_BASETYPE (type) = t;
5115 /* Our own class provides vtbl ptr. */
5116 for (i = TYPE_NFIELDS (t) - 1;
5117 i >= TYPE_N_BASECLASSES (t);
5120 char *fieldname = TYPE_FIELD_NAME (t, i);
5122 if (is_vtable_name (fieldname, cu))
5124 TYPE_VPTR_FIELDNO (type) = i;
5129 /* Complain if virtual function table field not found. */
5130 if (i < TYPE_N_BASECLASSES (t))
5131 complaint (&symfile_complaints,
5132 _("virtual function table pointer not found when defining class '%s'"),
5133 TYPE_TAG_NAME (type) ? TYPE_TAG_NAME (type) :
5138 TYPE_VPTR_FIELDNO (type) = TYPE_VPTR_FIELDNO (t);
5141 else if (cu->producer
5142 && strncmp (cu->producer,
5143 "IBM(R) XL C/C++ Advanced Edition", 32) == 0)
5145 /* The IBM XLC compiler does not provide direct indication
5146 of the containing type, but the vtable pointer is
5147 always named __vfp. */
5151 for (i = TYPE_NFIELDS (type) - 1;
5152 i >= TYPE_N_BASECLASSES (type);
5155 if (strcmp (TYPE_FIELD_NAME (type, i), "__vfp") == 0)
5157 TYPE_VPTR_FIELDNO (type) = i;
5158 TYPE_VPTR_BASETYPE (type) = type;
5166 do_cleanups (back_to);
5171 process_structure_scope (struct die_info *die, struct dwarf2_cu *cu)
5173 struct objfile *objfile = cu->objfile;
5174 struct die_info *child_die = die->child;
5175 struct type *this_type;
5177 this_type = get_die_type (die, cu);
5178 if (this_type == NULL)
5179 this_type = read_structure_type (die, cu);
5181 /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its
5182 snapshots) has been known to create a die giving a declaration
5183 for a class that has, as a child, a die giving a definition for a
5184 nested class. So we have to process our children even if the
5185 current die is a declaration. Normally, of course, a declaration
5186 won't have any children at all. */
5188 while (child_die != NULL && child_die->tag)
5190 if (child_die->tag == DW_TAG_member
5191 || child_die->tag == DW_TAG_variable
5192 || child_die->tag == DW_TAG_inheritance)
5197 process_die (child_die, cu);
5199 child_die = sibling_die (child_die);
5202 /* Do not consider external references. According to the DWARF standard,
5203 these DIEs are identified by the fact that they have no byte_size
5204 attribute, and a declaration attribute. */
5205 if (dwarf2_attr (die, DW_AT_byte_size, cu) != NULL
5206 || !die_is_declaration (die, cu))
5207 new_symbol (die, this_type, cu);
5210 /* Given a DW_AT_enumeration_type die, set its type. We do not
5211 complete the type's fields yet, or create any symbols. */
5213 static struct type *
5214 read_enumeration_type (struct die_info *die, struct dwarf2_cu *cu)
5216 struct objfile *objfile = cu->objfile;
5218 struct attribute *attr;
5221 /* If the definition of this type lives in .debug_types, read that type.
5222 Don't follow DW_AT_specification though, that will take us back up
5223 the chain and we want to go down. */
5224 attr = dwarf2_attr_no_follow (die, DW_AT_signature, cu);
5227 struct dwarf2_cu *type_cu = cu;
5228 struct die_info *type_die = follow_die_ref_or_sig (die, attr, &type_cu);
5229 type = read_type_die (type_die, type_cu);
5230 return set_die_type (die, type, cu);
5233 type = alloc_type (objfile);
5235 TYPE_CODE (type) = TYPE_CODE_ENUM;
5236 name = dwarf2_full_name (die, cu);
5238 TYPE_TAG_NAME (type) = (char *) name;
5240 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
5243 TYPE_LENGTH (type) = DW_UNSND (attr);
5247 TYPE_LENGTH (type) = 0;
5250 /* The enumeration DIE can be incomplete. In Ada, any type can be
5251 declared as private in the package spec, and then defined only
5252 inside the package body. Such types are known as Taft Amendment
5253 Types. When another package uses such a type, an incomplete DIE
5254 may be generated by the compiler. */
5255 if (die_is_declaration (die, cu))
5256 TYPE_STUB (type) = 1;
5258 return set_die_type (die, type, cu);
5261 /* Determine the name of the type represented by DIE, which should be
5262 a named C++ or Java compound type. Return the name in question,
5263 allocated on the objfile obstack. */
5266 determine_class_name (struct die_info *die, struct dwarf2_cu *cu)
5268 const char *new_prefix = NULL;
5270 /* If we don't have namespace debug info, guess the name by trying
5271 to demangle the names of members, just like we did in
5272 guess_structure_name. */
5273 if (!processing_has_namespace_info)
5275 struct die_info *child;
5277 for (child = die->child;
5278 child != NULL && child->tag != 0;
5279 child = sibling_die (child))
5281 if (child->tag == DW_TAG_subprogram)
5284 = language_class_name_from_physname (cu->language_defn,
5288 if (phys_prefix != NULL)
5291 = obsavestring (phys_prefix, strlen (phys_prefix),
5292 &cu->objfile->objfile_obstack);
5293 xfree (phys_prefix);
5300 if (new_prefix == NULL)
5301 new_prefix = dwarf2_full_name (die, cu);
5306 /* Given a pointer to a die which begins an enumeration, process all
5307 the dies that define the members of the enumeration, and create the
5308 symbol for the enumeration type.
5310 NOTE: We reverse the order of the element list. */
5313 process_enumeration_scope (struct die_info *die, struct dwarf2_cu *cu)
5315 struct objfile *objfile = cu->objfile;
5316 struct die_info *child_die;
5317 struct field *fields;
5320 int unsigned_enum = 1;
5322 struct type *this_type;
5326 this_type = get_die_type (die, cu);
5327 if (this_type == NULL)
5328 this_type = read_enumeration_type (die, cu);
5329 if (die->child != NULL)
5331 child_die = die->child;
5332 while (child_die && child_die->tag)
5334 if (child_die->tag != DW_TAG_enumerator)
5336 process_die (child_die, cu);
5340 name = dwarf2_name (child_die, cu);
5343 sym = new_symbol (child_die, this_type, cu);
5344 if (SYMBOL_VALUE (sym) < 0)
5347 if ((num_fields % DW_FIELD_ALLOC_CHUNK) == 0)
5349 fields = (struct field *)
5351 (num_fields + DW_FIELD_ALLOC_CHUNK)
5352 * sizeof (struct field));
5355 FIELD_NAME (fields[num_fields]) = SYMBOL_LINKAGE_NAME (sym);
5356 FIELD_TYPE (fields[num_fields]) = NULL;
5357 SET_FIELD_BITPOS (fields[num_fields], SYMBOL_VALUE (sym));
5358 FIELD_BITSIZE (fields[num_fields]) = 0;
5364 child_die = sibling_die (child_die);
5369 TYPE_NFIELDS (this_type) = num_fields;
5370 TYPE_FIELDS (this_type) = (struct field *)
5371 TYPE_ALLOC (this_type, sizeof (struct field) * num_fields);
5372 memcpy (TYPE_FIELDS (this_type), fields,
5373 sizeof (struct field) * num_fields);
5377 TYPE_UNSIGNED (this_type) = 1;
5380 new_symbol (die, this_type, cu);
5383 /* Extract all information from a DW_TAG_array_type DIE and put it in
5384 the DIE's type field. For now, this only handles one dimensional
5387 static struct type *
5388 read_array_type (struct die_info *die, struct dwarf2_cu *cu)
5390 struct objfile *objfile = cu->objfile;
5391 struct die_info *child_die;
5392 struct type *type = NULL;
5393 struct type *element_type, *range_type, *index_type;
5394 struct type **range_types = NULL;
5395 struct attribute *attr;
5397 struct cleanup *back_to;
5400 element_type = die_type (die, cu);
5402 /* Irix 6.2 native cc creates array types without children for
5403 arrays with unspecified length. */
5404 if (die->child == NULL)
5406 index_type = objfile_type (objfile)->builtin_int;
5407 range_type = create_range_type (NULL, index_type, 0, -1);
5408 type = create_array_type (NULL, element_type, range_type);
5409 return set_die_type (die, type, cu);
5412 back_to = make_cleanup (null_cleanup, NULL);
5413 child_die = die->child;
5414 while (child_die && child_die->tag)
5416 if (child_die->tag == DW_TAG_subrange_type)
5418 struct type *child_type = read_type_die (child_die, cu);
5419 if (child_type != NULL)
5421 /* The range type was succesfully read. Save it for
5422 the array type creation. */
5423 if ((ndim % DW_FIELD_ALLOC_CHUNK) == 0)
5425 range_types = (struct type **)
5426 xrealloc (range_types, (ndim + DW_FIELD_ALLOC_CHUNK)
5427 * sizeof (struct type *));
5429 make_cleanup (free_current_contents, &range_types);
5431 range_types[ndim++] = child_type;
5434 child_die = sibling_die (child_die);
5437 /* Dwarf2 dimensions are output from left to right, create the
5438 necessary array types in backwards order. */
5440 type = element_type;
5442 if (read_array_order (die, cu) == DW_ORD_col_major)
5446 type = create_array_type (NULL, type, range_types[i++]);
5451 type = create_array_type (NULL, type, range_types[ndim]);
5454 /* Understand Dwarf2 support for vector types (like they occur on
5455 the PowerPC w/ AltiVec). Gcc just adds another attribute to the
5456 array type. This is not part of the Dwarf2/3 standard yet, but a
5457 custom vendor extension. The main difference between a regular
5458 array and the vector variant is that vectors are passed by value
5460 attr = dwarf2_attr (die, DW_AT_GNU_vector, cu);
5462 make_vector_type (type);
5464 name = dwarf2_name (die, cu);
5466 TYPE_NAME (type) = name;
5468 set_descriptive_type (type, die, cu);
5470 do_cleanups (back_to);
5472 /* Install the type in the die. */
5473 return set_die_type (die, type, cu);
5476 static enum dwarf_array_dim_ordering
5477 read_array_order (struct die_info *die, struct dwarf2_cu *cu)
5479 struct attribute *attr;
5481 attr = dwarf2_attr (die, DW_AT_ordering, cu);
5483 if (attr) return DW_SND (attr);
5486 GNU F77 is a special case, as at 08/2004 array type info is the
5487 opposite order to the dwarf2 specification, but data is still
5488 laid out as per normal fortran.
5490 FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need
5494 if (cu->language == language_fortran
5495 && cu->producer && strstr (cu->producer, "GNU F77"))
5497 return DW_ORD_row_major;
5500 switch (cu->language_defn->la_array_ordering)
5502 case array_column_major:
5503 return DW_ORD_col_major;
5504 case array_row_major:
5506 return DW_ORD_row_major;
5510 /* Extract all information from a DW_TAG_set_type DIE and put it in
5511 the DIE's type field. */
5513 static struct type *
5514 read_set_type (struct die_info *die, struct dwarf2_cu *cu)
5516 struct type *set_type = create_set_type (NULL, die_type (die, cu));
5518 return set_die_type (die, set_type, cu);
5521 /* First cut: install each common block member as a global variable. */
5524 read_common_block (struct die_info *die, struct dwarf2_cu *cu)
5526 struct die_info *child_die;
5527 struct attribute *attr;
5529 CORE_ADDR base = (CORE_ADDR) 0;
5531 attr = dwarf2_attr (die, DW_AT_location, cu);
5534 /* Support the .debug_loc offsets */
5535 if (attr_form_is_block (attr))
5537 base = decode_locdesc (DW_BLOCK (attr), cu);
5539 else if (attr_form_is_section_offset (attr))
5541 dwarf2_complex_location_expr_complaint ();
5545 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
5546 "common block member");
5549 if (die->child != NULL)
5551 child_die = die->child;
5552 while (child_die && child_die->tag)
5554 sym = new_symbol (child_die, NULL, cu);
5555 attr = dwarf2_attr (child_die, DW_AT_data_member_location, cu);
5558 CORE_ADDR byte_offset = 0;
5560 if (attr_form_is_section_offset (attr))
5561 dwarf2_complex_location_expr_complaint ();
5562 else if (attr_form_is_constant (attr))
5563 byte_offset = dwarf2_get_attr_constant_value (attr, 0);
5564 else if (attr_form_is_block (attr))
5565 byte_offset = decode_locdesc (DW_BLOCK (attr), cu);
5567 dwarf2_complex_location_expr_complaint ();
5569 SYMBOL_VALUE_ADDRESS (sym) = base + byte_offset;
5570 add_symbol_to_list (sym, &global_symbols);
5572 child_die = sibling_die (child_die);
5577 /* Create a type for a C++ namespace. */
5579 static struct type *
5580 read_namespace_type (struct die_info *die, struct dwarf2_cu *cu)
5582 struct objfile *objfile = cu->objfile;
5583 const char *previous_prefix, *name;
5587 /* For extensions, reuse the type of the original namespace. */
5588 if (dwarf2_attr (die, DW_AT_extension, cu) != NULL)
5590 struct die_info *ext_die;
5591 struct dwarf2_cu *ext_cu = cu;
5592 ext_die = dwarf2_extension (die, &ext_cu);
5593 type = read_type_die (ext_die, ext_cu);
5594 return set_die_type (die, type, cu);
5597 name = namespace_name (die, &is_anonymous, cu);
5599 /* Now build the name of the current namespace. */
5601 previous_prefix = determine_prefix (die, cu);
5602 if (previous_prefix[0] != '\0')
5603 name = typename_concat (&objfile->objfile_obstack,
5604 previous_prefix, name, cu);
5606 /* Create the type. */
5607 type = init_type (TYPE_CODE_NAMESPACE, 0, 0, NULL,
5609 TYPE_NAME (type) = (char *) name;
5610 TYPE_TAG_NAME (type) = TYPE_NAME (type);
5612 set_die_type (die, type, cu);
5617 /* Read a C++ namespace. */
5620 read_namespace (struct die_info *die, struct dwarf2_cu *cu)
5622 struct objfile *objfile = cu->objfile;
5626 /* Add a symbol associated to this if we haven't seen the namespace
5627 before. Also, add a using directive if it's an anonymous
5630 if (dwarf2_attr (die, DW_AT_extension, cu) == NULL)
5634 type = read_type_die (die, cu);
5635 new_symbol (die, type, cu);
5637 name = namespace_name (die, &is_anonymous, cu);
5640 const char *previous_prefix = determine_prefix (die, cu);
5641 cp_add_using_directive (previous_prefix, TYPE_NAME (type));
5645 if (die->child != NULL)
5647 struct die_info *child_die = die->child;
5649 while (child_die && child_die->tag)
5651 process_die (child_die, cu);
5652 child_die = sibling_die (child_die);
5657 /* Read a Fortran module. */
5660 read_module (struct die_info *die, struct dwarf2_cu *cu)
5662 struct die_info *child_die = die->child;
5664 /* FIXME: Support the separate Fortran module namespaces. */
5666 while (child_die && child_die->tag)
5668 process_die (child_die, cu);
5669 child_die = sibling_die (child_die);
5673 /* Return the name of the namespace represented by DIE. Set
5674 *IS_ANONYMOUS to tell whether or not the namespace is an anonymous
5678 namespace_name (struct die_info *die, int *is_anonymous, struct dwarf2_cu *cu)
5680 struct die_info *current_die;
5681 const char *name = NULL;
5683 /* Loop through the extensions until we find a name. */
5685 for (current_die = die;
5686 current_die != NULL;
5687 current_die = dwarf2_extension (die, &cu))
5689 name = dwarf2_name (current_die, cu);
5694 /* Is it an anonymous namespace? */
5696 *is_anonymous = (name == NULL);
5698 name = "(anonymous namespace)";
5703 /* Extract all information from a DW_TAG_pointer_type DIE and add to
5704 the user defined type vector. */
5706 static struct type *
5707 read_tag_pointer_type (struct die_info *die, struct dwarf2_cu *cu)
5709 struct gdbarch *gdbarch = get_objfile_arch (cu->objfile);
5710 struct comp_unit_head *cu_header = &cu->header;
5712 struct attribute *attr_byte_size;
5713 struct attribute *attr_address_class;
5714 int byte_size, addr_class;
5716 type = lookup_pointer_type (die_type (die, cu));
5718 attr_byte_size = dwarf2_attr (die, DW_AT_byte_size, cu);
5720 byte_size = DW_UNSND (attr_byte_size);
5722 byte_size = cu_header->addr_size;
5724 attr_address_class = dwarf2_attr (die, DW_AT_address_class, cu);
5725 if (attr_address_class)
5726 addr_class = DW_UNSND (attr_address_class);
5728 addr_class = DW_ADDR_none;
5730 /* If the pointer size or address class is different than the
5731 default, create a type variant marked as such and set the
5732 length accordingly. */
5733 if (TYPE_LENGTH (type) != byte_size || addr_class != DW_ADDR_none)
5735 if (gdbarch_address_class_type_flags_p (gdbarch))
5739 type_flags = gdbarch_address_class_type_flags
5740 (gdbarch, byte_size, addr_class);
5741 gdb_assert ((type_flags & ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL)
5743 type = make_type_with_address_space (type, type_flags);
5745 else if (TYPE_LENGTH (type) != byte_size)
5747 complaint (&symfile_complaints, _("invalid pointer size %d"), byte_size);
5750 /* Should we also complain about unhandled address classes? */
5754 TYPE_LENGTH (type) = byte_size;
5755 return set_die_type (die, type, cu);
5758 /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to
5759 the user defined type vector. */
5761 static struct type *
5762 read_tag_ptr_to_member_type (struct die_info *die, struct dwarf2_cu *cu)
5764 struct objfile *objfile = cu->objfile;
5766 struct type *to_type;
5767 struct type *domain;
5769 to_type = die_type (die, cu);
5770 domain = die_containing_type (die, cu);
5772 if (TYPE_CODE (check_typedef (to_type)) == TYPE_CODE_METHOD)
5773 type = lookup_methodptr_type (to_type);
5775 type = lookup_memberptr_type (to_type, domain);
5777 return set_die_type (die, type, cu);
5780 /* Extract all information from a DW_TAG_reference_type DIE and add to
5781 the user defined type vector. */
5783 static struct type *
5784 read_tag_reference_type (struct die_info *die, struct dwarf2_cu *cu)
5786 struct comp_unit_head *cu_header = &cu->header;
5788 struct attribute *attr;
5790 type = lookup_reference_type (die_type (die, cu));
5791 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
5794 TYPE_LENGTH (type) = DW_UNSND (attr);
5798 TYPE_LENGTH (type) = cu_header->addr_size;
5800 return set_die_type (die, type, cu);
5803 static struct type *
5804 read_tag_const_type (struct die_info *die, struct dwarf2_cu *cu)
5806 struct type *base_type, *cv_type;
5808 base_type = die_type (die, cu);
5809 cv_type = make_cv_type (1, TYPE_VOLATILE (base_type), base_type, 0);
5810 return set_die_type (die, cv_type, cu);
5813 static struct type *
5814 read_tag_volatile_type (struct die_info *die, struct dwarf2_cu *cu)
5816 struct type *base_type, *cv_type;
5818 base_type = die_type (die, cu);
5819 cv_type = make_cv_type (TYPE_CONST (base_type), 1, base_type, 0);
5820 return set_die_type (die, cv_type, cu);
5823 /* Extract all information from a DW_TAG_string_type DIE and add to
5824 the user defined type vector. It isn't really a user defined type,
5825 but it behaves like one, with other DIE's using an AT_user_def_type
5826 attribute to reference it. */
5828 static struct type *
5829 read_tag_string_type (struct die_info *die, struct dwarf2_cu *cu)
5831 struct objfile *objfile = cu->objfile;
5832 struct gdbarch *gdbarch = get_objfile_arch (objfile);
5833 struct type *type, *range_type, *index_type, *char_type;
5834 struct attribute *attr;
5835 unsigned int length;
5837 attr = dwarf2_attr (die, DW_AT_string_length, cu);
5840 length = DW_UNSND (attr);
5844 /* check for the DW_AT_byte_size attribute */
5845 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
5848 length = DW_UNSND (attr);
5856 index_type = objfile_type (objfile)->builtin_int;
5857 range_type = create_range_type (NULL, index_type, 1, length);
5858 char_type = language_string_char_type (cu->language_defn, gdbarch);
5859 type = create_string_type (NULL, char_type, range_type);
5861 return set_die_type (die, type, cu);
5864 /* Handle DIES due to C code like:
5868 int (*funcp)(int a, long l);
5872 ('funcp' generates a DW_TAG_subroutine_type DIE)
5875 static struct type *
5876 read_subroutine_type (struct die_info *die, struct dwarf2_cu *cu)
5878 struct type *type; /* Type that this function returns */
5879 struct type *ftype; /* Function that returns above type */
5880 struct attribute *attr;
5882 type = die_type (die, cu);
5883 ftype = lookup_function_type (type);
5885 /* All functions in C++, Pascal and Java have prototypes. */
5886 attr = dwarf2_attr (die, DW_AT_prototyped, cu);
5887 if ((attr && (DW_UNSND (attr) != 0))
5888 || cu->language == language_cplus
5889 || cu->language == language_java
5890 || cu->language == language_pascal)
5891 TYPE_PROTOTYPED (ftype) = 1;
5893 /* Store the calling convention in the type if it's available in
5894 the subroutine die. Otherwise set the calling convention to
5895 the default value DW_CC_normal. */
5896 attr = dwarf2_attr (die, DW_AT_calling_convention, cu);
5897 TYPE_CALLING_CONVENTION (ftype) = attr ? DW_UNSND (attr) : DW_CC_normal;
5899 /* We need to add the subroutine type to the die immediately so
5900 we don't infinitely recurse when dealing with parameters
5901 declared as the same subroutine type. */
5902 set_die_type (die, ftype, cu);
5904 if (die->child != NULL)
5906 struct die_info *child_die;
5910 /* Count the number of parameters.
5911 FIXME: GDB currently ignores vararg functions, but knows about
5912 vararg member functions. */
5913 child_die = die->child;
5914 while (child_die && child_die->tag)
5916 if (child_die->tag == DW_TAG_formal_parameter)
5918 else if (child_die->tag == DW_TAG_unspecified_parameters)
5919 TYPE_VARARGS (ftype) = 1;
5920 child_die = sibling_die (child_die);
5923 /* Allocate storage for parameters and fill them in. */
5924 TYPE_NFIELDS (ftype) = nparams;
5925 TYPE_FIELDS (ftype) = (struct field *)
5926 TYPE_ZALLOC (ftype, nparams * sizeof (struct field));
5928 child_die = die->child;
5929 while (child_die && child_die->tag)
5931 if (child_die->tag == DW_TAG_formal_parameter)
5933 /* Dwarf2 has no clean way to discern C++ static and non-static
5934 member functions. G++ helps GDB by marking the first
5935 parameter for non-static member functions (which is the
5936 this pointer) as artificial. We pass this information
5937 to dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL. */
5938 attr = dwarf2_attr (child_die, DW_AT_artificial, cu);
5940 TYPE_FIELD_ARTIFICIAL (ftype, iparams) = DW_UNSND (attr);
5942 TYPE_FIELD_ARTIFICIAL (ftype, iparams) = 0;
5943 TYPE_FIELD_TYPE (ftype, iparams) = die_type (child_die, cu);
5946 child_die = sibling_die (child_die);
5953 static struct type *
5954 read_typedef (struct die_info *die, struct dwarf2_cu *cu)
5956 struct objfile *objfile = cu->objfile;
5957 struct attribute *attr;
5958 const char *name = NULL;
5959 struct type *this_type;
5961 name = dwarf2_full_name (die, cu);
5962 this_type = init_type (TYPE_CODE_TYPEDEF, 0,
5963 TYPE_FLAG_TARGET_STUB, NULL, objfile);
5964 TYPE_NAME (this_type) = (char *) name;
5965 set_die_type (die, this_type, cu);
5966 TYPE_TARGET_TYPE (this_type) = die_type (die, cu);
5970 /* Find a representation of a given base type and install
5971 it in the TYPE field of the die. */
5973 static struct type *
5974 read_base_type (struct die_info *die, struct dwarf2_cu *cu)
5976 struct objfile *objfile = cu->objfile;
5978 struct attribute *attr;
5979 int encoding = 0, size = 0;
5981 enum type_code code = TYPE_CODE_INT;
5983 struct type *target_type = NULL;
5985 attr = dwarf2_attr (die, DW_AT_encoding, cu);
5988 encoding = DW_UNSND (attr);
5990 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
5993 size = DW_UNSND (attr);
5995 name = dwarf2_name (die, cu);
5998 complaint (&symfile_complaints,
5999 _("DW_AT_name missing from DW_TAG_base_type"));
6004 case DW_ATE_address:
6005 /* Turn DW_ATE_address into a void * pointer. */
6006 code = TYPE_CODE_PTR;
6007 type_flags |= TYPE_FLAG_UNSIGNED;
6008 target_type = init_type (TYPE_CODE_VOID, 1, 0, NULL, objfile);
6010 case DW_ATE_boolean:
6011 code = TYPE_CODE_BOOL;
6012 type_flags |= TYPE_FLAG_UNSIGNED;
6014 case DW_ATE_complex_float:
6015 code = TYPE_CODE_COMPLEX;
6016 target_type = init_type (TYPE_CODE_FLT, size / 2, 0, NULL, objfile);
6018 case DW_ATE_decimal_float:
6019 code = TYPE_CODE_DECFLOAT;
6022 code = TYPE_CODE_FLT;
6026 case DW_ATE_unsigned:
6027 type_flags |= TYPE_FLAG_UNSIGNED;
6029 case DW_ATE_signed_char:
6030 if (cu->language == language_ada || cu->language == language_m2
6031 || cu->language == language_pascal)
6032 code = TYPE_CODE_CHAR;
6034 case DW_ATE_unsigned_char:
6035 if (cu->language == language_ada || cu->language == language_m2
6036 || cu->language == language_pascal)
6037 code = TYPE_CODE_CHAR;
6038 type_flags |= TYPE_FLAG_UNSIGNED;
6041 complaint (&symfile_complaints, _("unsupported DW_AT_encoding: '%s'"),
6042 dwarf_type_encoding_name (encoding));
6046 type = init_type (code, size, type_flags, NULL, objfile);
6047 TYPE_NAME (type) = name;
6048 TYPE_TARGET_TYPE (type) = target_type;
6050 if (name && strcmp (name, "char") == 0)
6051 TYPE_NOSIGN (type) = 1;
6053 return set_die_type (die, type, cu);
6056 /* Read the given DW_AT_subrange DIE. */
6058 static struct type *
6059 read_subrange_type (struct die_info *die, struct dwarf2_cu *cu)
6061 struct gdbarch *gdbarch = get_objfile_arch (cu->objfile);
6062 struct type *base_type;
6063 struct type *range_type;
6064 struct attribute *attr;
6068 LONGEST negative_mask;
6070 base_type = die_type (die, cu);
6071 if (TYPE_CODE (base_type) == TYPE_CODE_VOID)
6073 complaint (&symfile_complaints,
6074 _("DW_AT_type missing from DW_TAG_subrange_type"));
6076 = init_type (TYPE_CODE_INT, gdbarch_addr_bit (gdbarch) / 8,
6077 0, NULL, cu->objfile);
6080 if (cu->language == language_fortran)
6082 /* FORTRAN implies a lower bound of 1, if not given. */
6086 /* FIXME: For variable sized arrays either of these could be
6087 a variable rather than a constant value. We'll allow it,
6088 but we don't know how to handle it. */
6089 attr = dwarf2_attr (die, DW_AT_lower_bound, cu);
6091 low = dwarf2_get_attr_constant_value (attr, 0);
6093 attr = dwarf2_attr (die, DW_AT_upper_bound, cu);
6096 if (attr->form == DW_FORM_block1)
6098 /* GCC encodes arrays with unspecified or dynamic length
6099 with a DW_FORM_block1 attribute.
6100 FIXME: GDB does not yet know how to handle dynamic
6101 arrays properly, treat them as arrays with unspecified
6104 FIXME: jimb/2003-09-22: GDB does not really know
6105 how to handle arrays of unspecified length
6106 either; we just represent them as zero-length
6107 arrays. Choose an appropriate upper bound given
6108 the lower bound we've computed above. */
6112 high = dwarf2_get_attr_constant_value (attr, 1);
6116 (LONGEST) -1 << (TYPE_LENGTH (base_type) * TARGET_CHAR_BIT - 1);
6117 if (!TYPE_UNSIGNED (base_type) && (low & negative_mask))
6118 low |= negative_mask;
6119 if (!TYPE_UNSIGNED (base_type) && (high & negative_mask))
6120 high |= negative_mask;
6122 range_type = create_range_type (NULL, base_type, low, high);
6124 name = dwarf2_name (die, cu);
6126 TYPE_NAME (range_type) = name;
6128 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
6130 TYPE_LENGTH (range_type) = DW_UNSND (attr);
6132 set_descriptive_type (range_type, die, cu);
6134 return set_die_type (die, range_type, cu);
6137 static struct type *
6138 read_unspecified_type (struct die_info *die, struct dwarf2_cu *cu)
6142 /* For now, we only support the C meaning of an unspecified type: void. */
6144 type = init_type (TYPE_CODE_VOID, 0, 0, NULL, cu->objfile);
6145 TYPE_NAME (type) = dwarf2_name (die, cu);
6147 return set_die_type (die, type, cu);
6150 /* Trivial hash function for die_info: the hash value of a DIE
6151 is its offset in .debug_info for this objfile. */
6154 die_hash (const void *item)
6156 const struct die_info *die = item;
6160 /* Trivial comparison function for die_info structures: two DIEs
6161 are equal if they have the same offset. */
6164 die_eq (const void *item_lhs, const void *item_rhs)
6166 const struct die_info *die_lhs = item_lhs;
6167 const struct die_info *die_rhs = item_rhs;
6168 return die_lhs->offset == die_rhs->offset;
6171 /* Read a whole compilation unit into a linked list of dies. */
6173 static struct die_info *
6174 read_comp_unit (gdb_byte *info_ptr, struct dwarf2_cu *cu)
6176 struct die_reader_specs reader_specs;
6178 gdb_assert (cu->die_hash == NULL);
6180 = htab_create_alloc_ex (cu->header.length / 12,
6184 &cu->comp_unit_obstack,
6185 hashtab_obstack_allocate,
6186 dummy_obstack_deallocate);
6188 init_cu_die_reader (&reader_specs, cu);
6190 return read_die_and_children (&reader_specs, info_ptr, &info_ptr, NULL);
6193 /* Main entry point for reading a DIE and all children.
6194 Read the DIE and dump it if requested. */
6196 static struct die_info *
6197 read_die_and_children (const struct die_reader_specs *reader,
6199 gdb_byte **new_info_ptr,
6200 struct die_info *parent)
6202 struct die_info *result = read_die_and_children_1 (reader, info_ptr,
6203 new_info_ptr, parent);
6205 if (dwarf2_die_debug)
6207 fprintf_unfiltered (gdb_stdlog,
6208 "\nRead die from %s of %s:\n",
6209 reader->buffer == dwarf2_per_objfile->info.buffer
6211 : reader->buffer == dwarf2_per_objfile->types.buffer
6213 : "unknown section",
6214 reader->abfd->filename);
6215 dump_die (result, dwarf2_die_debug);
6221 /* Read a single die and all its descendents. Set the die's sibling
6222 field to NULL; set other fields in the die correctly, and set all
6223 of the descendents' fields correctly. Set *NEW_INFO_PTR to the
6224 location of the info_ptr after reading all of those dies. PARENT
6225 is the parent of the die in question. */
6227 static struct die_info *
6228 read_die_and_children_1 (const struct die_reader_specs *reader,
6230 gdb_byte **new_info_ptr,
6231 struct die_info *parent)
6233 struct die_info *die;
6237 cur_ptr = read_full_die (reader, &die, info_ptr, &has_children);
6240 *new_info_ptr = cur_ptr;
6243 store_in_ref_table (die, reader->cu);
6246 die->child = read_die_and_siblings (reader, cur_ptr, new_info_ptr, die);
6250 *new_info_ptr = cur_ptr;
6253 die->sibling = NULL;
6254 die->parent = parent;
6258 /* Read a die, all of its descendents, and all of its siblings; set
6259 all of the fields of all of the dies correctly. Arguments are as
6260 in read_die_and_children. */
6262 static struct die_info *
6263 read_die_and_siblings (const struct die_reader_specs *reader,
6265 gdb_byte **new_info_ptr,
6266 struct die_info *parent)
6268 struct die_info *first_die, *last_sibling;
6272 first_die = last_sibling = NULL;
6276 struct die_info *die
6277 = read_die_and_children_1 (reader, cur_ptr, &cur_ptr, parent);
6281 *new_info_ptr = cur_ptr;
6288 last_sibling->sibling = die;
6294 /* Read the die from the .debug_info section buffer. Set DIEP to
6295 point to a newly allocated die with its information, except for its
6296 child, sibling, and parent fields. Set HAS_CHILDREN to tell
6297 whether the die has children or not. */
6300 read_full_die (const struct die_reader_specs *reader,
6301 struct die_info **diep, gdb_byte *info_ptr,
6304 unsigned int abbrev_number, bytes_read, i, offset;
6305 struct abbrev_info *abbrev;
6306 struct die_info *die;
6307 struct dwarf2_cu *cu = reader->cu;
6308 bfd *abfd = reader->abfd;
6310 offset = info_ptr - reader->buffer;
6311 abbrev_number = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
6312 info_ptr += bytes_read;
6320 abbrev = dwarf2_lookup_abbrev (abbrev_number, cu);
6322 error (_("Dwarf Error: could not find abbrev number %d [in module %s]"),
6324 bfd_get_filename (abfd));
6326 die = dwarf_alloc_die (cu, abbrev->num_attrs);
6327 die->offset = offset;
6328 die->tag = abbrev->tag;
6329 die->abbrev = abbrev_number;
6331 die->num_attrs = abbrev->num_attrs;
6333 for (i = 0; i < abbrev->num_attrs; ++i)
6334 info_ptr = read_attribute (&die->attrs[i], &abbrev->attrs[i],
6335 abfd, info_ptr, cu);
6338 *has_children = abbrev->has_children;
6342 /* In DWARF version 2, the description of the debugging information is
6343 stored in a separate .debug_abbrev section. Before we read any
6344 dies from a section we read in all abbreviations and install them
6345 in a hash table. This function also sets flags in CU describing
6346 the data found in the abbrev table. */
6349 dwarf2_read_abbrevs (bfd *abfd, struct dwarf2_cu *cu)
6351 struct comp_unit_head *cu_header = &cu->header;
6352 gdb_byte *abbrev_ptr;
6353 struct abbrev_info *cur_abbrev;
6354 unsigned int abbrev_number, bytes_read, abbrev_name;
6355 unsigned int abbrev_form, hash_number;
6356 struct attr_abbrev *cur_attrs;
6357 unsigned int allocated_attrs;
6359 /* Initialize dwarf2 abbrevs */
6360 obstack_init (&cu->abbrev_obstack);
6361 cu->dwarf2_abbrevs = obstack_alloc (&cu->abbrev_obstack,
6363 * sizeof (struct abbrev_info *)));
6364 memset (cu->dwarf2_abbrevs, 0,
6365 ABBREV_HASH_SIZE * sizeof (struct abbrev_info *));
6367 abbrev_ptr = dwarf2_per_objfile->abbrev.buffer + cu_header->abbrev_offset;
6368 abbrev_number = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
6369 abbrev_ptr += bytes_read;
6371 allocated_attrs = ATTR_ALLOC_CHUNK;
6372 cur_attrs = xmalloc (allocated_attrs * sizeof (struct attr_abbrev));
6374 /* loop until we reach an abbrev number of 0 */
6375 while (abbrev_number)
6377 cur_abbrev = dwarf_alloc_abbrev (cu);
6379 /* read in abbrev header */
6380 cur_abbrev->number = abbrev_number;
6381 cur_abbrev->tag = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
6382 abbrev_ptr += bytes_read;
6383 cur_abbrev->has_children = read_1_byte (abfd, abbrev_ptr);
6386 if (cur_abbrev->tag == DW_TAG_namespace)
6387 cu->has_namespace_info = 1;
6389 /* now read in declarations */
6390 abbrev_name = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
6391 abbrev_ptr += bytes_read;
6392 abbrev_form = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
6393 abbrev_ptr += bytes_read;
6396 if (cur_abbrev->num_attrs == allocated_attrs)
6398 allocated_attrs += ATTR_ALLOC_CHUNK;
6400 = xrealloc (cur_attrs, (allocated_attrs
6401 * sizeof (struct attr_abbrev)));
6404 /* Record whether this compilation unit might have
6405 inter-compilation-unit references. If we don't know what form
6406 this attribute will have, then it might potentially be a
6407 DW_FORM_ref_addr, so we conservatively expect inter-CU
6410 if (abbrev_form == DW_FORM_ref_addr
6411 || abbrev_form == DW_FORM_indirect)
6412 cu->has_form_ref_addr = 1;
6414 cur_attrs[cur_abbrev->num_attrs].name = abbrev_name;
6415 cur_attrs[cur_abbrev->num_attrs++].form = abbrev_form;
6416 abbrev_name = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
6417 abbrev_ptr += bytes_read;
6418 abbrev_form = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
6419 abbrev_ptr += bytes_read;
6422 cur_abbrev->attrs = obstack_alloc (&cu->abbrev_obstack,
6423 (cur_abbrev->num_attrs
6424 * sizeof (struct attr_abbrev)));
6425 memcpy (cur_abbrev->attrs, cur_attrs,
6426 cur_abbrev->num_attrs * sizeof (struct attr_abbrev));
6428 hash_number = abbrev_number % ABBREV_HASH_SIZE;
6429 cur_abbrev->next = cu->dwarf2_abbrevs[hash_number];
6430 cu->dwarf2_abbrevs[hash_number] = cur_abbrev;
6432 /* Get next abbreviation.
6433 Under Irix6 the abbreviations for a compilation unit are not
6434 always properly terminated with an abbrev number of 0.
6435 Exit loop if we encounter an abbreviation which we have
6436 already read (which means we are about to read the abbreviations
6437 for the next compile unit) or if the end of the abbreviation
6438 table is reached. */
6439 if ((unsigned int) (abbrev_ptr - dwarf2_per_objfile->abbrev.buffer)
6440 >= dwarf2_per_objfile->abbrev.size)
6442 abbrev_number = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
6443 abbrev_ptr += bytes_read;
6444 if (dwarf2_lookup_abbrev (abbrev_number, cu) != NULL)
6451 /* Release the memory used by the abbrev table for a compilation unit. */
6454 dwarf2_free_abbrev_table (void *ptr_to_cu)
6456 struct dwarf2_cu *cu = ptr_to_cu;
6458 obstack_free (&cu->abbrev_obstack, NULL);
6459 cu->dwarf2_abbrevs = NULL;
6462 /* Lookup an abbrev_info structure in the abbrev hash table. */
6464 static struct abbrev_info *
6465 dwarf2_lookup_abbrev (unsigned int number, struct dwarf2_cu *cu)
6467 unsigned int hash_number;
6468 struct abbrev_info *abbrev;
6470 hash_number = number % ABBREV_HASH_SIZE;
6471 abbrev = cu->dwarf2_abbrevs[hash_number];
6475 if (abbrev->number == number)
6478 abbrev = abbrev->next;
6483 /* Returns nonzero if TAG represents a type that we might generate a partial
6487 is_type_tag_for_partial (int tag)
6492 /* Some types that would be reasonable to generate partial symbols for,
6493 that we don't at present. */
6494 case DW_TAG_array_type:
6495 case DW_TAG_file_type:
6496 case DW_TAG_ptr_to_member_type:
6497 case DW_TAG_set_type:
6498 case DW_TAG_string_type:
6499 case DW_TAG_subroutine_type:
6501 case DW_TAG_base_type:
6502 case DW_TAG_class_type:
6503 case DW_TAG_interface_type:
6504 case DW_TAG_enumeration_type:
6505 case DW_TAG_structure_type:
6506 case DW_TAG_subrange_type:
6507 case DW_TAG_typedef:
6508 case DW_TAG_union_type:
6515 /* Load all DIEs that are interesting for partial symbols into memory. */
6517 static struct partial_die_info *
6518 load_partial_dies (bfd *abfd, gdb_byte *buffer, gdb_byte *info_ptr,
6519 int building_psymtab, struct dwarf2_cu *cu)
6521 struct partial_die_info *part_die;
6522 struct partial_die_info *parent_die, *last_die, *first_die = NULL;
6523 struct abbrev_info *abbrev;
6524 unsigned int bytes_read;
6525 unsigned int load_all = 0;
6527 int nesting_level = 1;
6532 if (cu->per_cu && cu->per_cu->load_all_dies)
6536 = htab_create_alloc_ex (cu->header.length / 12,
6540 &cu->comp_unit_obstack,
6541 hashtab_obstack_allocate,
6542 dummy_obstack_deallocate);
6544 part_die = obstack_alloc (&cu->comp_unit_obstack,
6545 sizeof (struct partial_die_info));
6549 abbrev = peek_die_abbrev (info_ptr, &bytes_read, cu);
6551 /* A NULL abbrev means the end of a series of children. */
6554 if (--nesting_level == 0)
6556 /* PART_DIE was probably the last thing allocated on the
6557 comp_unit_obstack, so we could call obstack_free
6558 here. We don't do that because the waste is small,
6559 and will be cleaned up when we're done with this
6560 compilation unit. This way, we're also more robust
6561 against other users of the comp_unit_obstack. */
6564 info_ptr += bytes_read;
6565 last_die = parent_die;
6566 parent_die = parent_die->die_parent;
6570 /* Check whether this DIE is interesting enough to save. Normally
6571 we would not be interested in members here, but there may be
6572 later variables referencing them via DW_AT_specification (for
6575 && !is_type_tag_for_partial (abbrev->tag)
6576 && abbrev->tag != DW_TAG_enumerator
6577 && abbrev->tag != DW_TAG_subprogram
6578 && abbrev->tag != DW_TAG_lexical_block
6579 && abbrev->tag != DW_TAG_variable
6580 && abbrev->tag != DW_TAG_namespace
6581 && abbrev->tag != DW_TAG_member)
6583 /* Otherwise we skip to the next sibling, if any. */
6584 info_ptr = skip_one_die (buffer, info_ptr + bytes_read, abbrev, cu);
6588 info_ptr = read_partial_die (part_die, abbrev, bytes_read, abfd,
6589 buffer, info_ptr, cu);
6591 /* This two-pass algorithm for processing partial symbols has a
6592 high cost in cache pressure. Thus, handle some simple cases
6593 here which cover the majority of C partial symbols. DIEs
6594 which neither have specification tags in them, nor could have
6595 specification tags elsewhere pointing at them, can simply be
6596 processed and discarded.
6598 This segment is also optional; scan_partial_symbols and
6599 add_partial_symbol will handle these DIEs if we chain
6600 them in normally. When compilers which do not emit large
6601 quantities of duplicate debug information are more common,
6602 this code can probably be removed. */
6604 /* Any complete simple types at the top level (pretty much all
6605 of them, for a language without namespaces), can be processed
6607 if (parent_die == NULL
6608 && part_die->has_specification == 0
6609 && part_die->is_declaration == 0
6610 && (part_die->tag == DW_TAG_typedef
6611 || part_die->tag == DW_TAG_base_type
6612 || part_die->tag == DW_TAG_subrange_type))
6614 if (building_psymtab && part_die->name != NULL)
6615 add_psymbol_to_list (part_die->name, strlen (part_die->name), 0,
6616 VAR_DOMAIN, LOC_TYPEDEF,
6617 &cu->objfile->static_psymbols,
6618 0, (CORE_ADDR) 0, cu->language, cu->objfile);
6619 info_ptr = locate_pdi_sibling (part_die, buffer, info_ptr, abfd, cu);
6623 /* If we're at the second level, and we're an enumerator, and
6624 our parent has no specification (meaning possibly lives in a
6625 namespace elsewhere), then we can add the partial symbol now
6626 instead of queueing it. */
6627 if (part_die->tag == DW_TAG_enumerator
6628 && parent_die != NULL
6629 && parent_die->die_parent == NULL
6630 && parent_die->tag == DW_TAG_enumeration_type
6631 && parent_die->has_specification == 0)
6633 if (part_die->name == NULL)
6634 complaint (&symfile_complaints, _("malformed enumerator DIE ignored"));
6635 else if (building_psymtab)
6636 add_psymbol_to_list (part_die->name, strlen (part_die->name), 0,
6637 VAR_DOMAIN, LOC_CONST,
6638 (cu->language == language_cplus
6639 || cu->language == language_java)
6640 ? &cu->objfile->global_psymbols
6641 : &cu->objfile->static_psymbols,
6642 0, (CORE_ADDR) 0, cu->language, cu->objfile);
6644 info_ptr = locate_pdi_sibling (part_die, buffer, info_ptr, abfd, cu);
6648 /* We'll save this DIE so link it in. */
6649 part_die->die_parent = parent_die;
6650 part_die->die_sibling = NULL;
6651 part_die->die_child = NULL;
6653 if (last_die && last_die == parent_die)
6654 last_die->die_child = part_die;
6656 last_die->die_sibling = part_die;
6658 last_die = part_die;
6660 if (first_die == NULL)
6661 first_die = part_die;
6663 /* Maybe add the DIE to the hash table. Not all DIEs that we
6664 find interesting need to be in the hash table, because we
6665 also have the parent/sibling/child chains; only those that we
6666 might refer to by offset later during partial symbol reading.
6668 For now this means things that might have be the target of a
6669 DW_AT_specification, DW_AT_abstract_origin, or
6670 DW_AT_extension. DW_AT_extension will refer only to
6671 namespaces; DW_AT_abstract_origin refers to functions (and
6672 many things under the function DIE, but we do not recurse
6673 into function DIEs during partial symbol reading) and
6674 possibly variables as well; DW_AT_specification refers to
6675 declarations. Declarations ought to have the DW_AT_declaration
6676 flag. It happens that GCC forgets to put it in sometimes, but
6677 only for functions, not for types.
6679 Adding more things than necessary to the hash table is harmless
6680 except for the performance cost. Adding too few will result in
6681 wasted time in find_partial_die, when we reread the compilation
6682 unit with load_all_dies set. */
6685 || abbrev->tag == DW_TAG_subprogram
6686 || abbrev->tag == DW_TAG_variable
6687 || abbrev->tag == DW_TAG_namespace
6688 || part_die->is_declaration)
6692 slot = htab_find_slot_with_hash (cu->partial_dies, part_die,
6693 part_die->offset, INSERT);
6697 part_die = obstack_alloc (&cu->comp_unit_obstack,
6698 sizeof (struct partial_die_info));
6700 /* For some DIEs we want to follow their children (if any). For C
6701 we have no reason to follow the children of structures; for other
6702 languages we have to, both so that we can get at method physnames
6703 to infer fully qualified class names, and for DW_AT_specification.
6705 For Ada, we need to scan the children of subprograms and lexical
6706 blocks as well because Ada allows the definition of nested
6707 entities that could be interesting for the debugger, such as
6708 nested subprograms for instance. */
6709 if (last_die->has_children
6711 || last_die->tag == DW_TAG_namespace
6712 || last_die->tag == DW_TAG_enumeration_type
6713 || (cu->language != language_c
6714 && (last_die->tag == DW_TAG_class_type
6715 || last_die->tag == DW_TAG_interface_type
6716 || last_die->tag == DW_TAG_structure_type
6717 || last_die->tag == DW_TAG_union_type))
6718 || (cu->language == language_ada
6719 && (last_die->tag == DW_TAG_subprogram
6720 || last_die->tag == DW_TAG_lexical_block))))
6723 parent_die = last_die;
6727 /* Otherwise we skip to the next sibling, if any. */
6728 info_ptr = locate_pdi_sibling (last_die, buffer, info_ptr, abfd, cu);
6730 /* Back to the top, do it again. */
6734 /* Read a minimal amount of information into the minimal die structure. */
6737 read_partial_die (struct partial_die_info *part_die,
6738 struct abbrev_info *abbrev,
6739 unsigned int abbrev_len, bfd *abfd,
6740 gdb_byte *buffer, gdb_byte *info_ptr,
6741 struct dwarf2_cu *cu)
6743 unsigned int bytes_read, i;
6744 struct attribute attr;
6745 int has_low_pc_attr = 0;
6746 int has_high_pc_attr = 0;
6748 memset (part_die, 0, sizeof (struct partial_die_info));
6750 part_die->offset = info_ptr - buffer;
6752 info_ptr += abbrev_len;
6757 part_die->tag = abbrev->tag;
6758 part_die->has_children = abbrev->has_children;
6760 for (i = 0; i < abbrev->num_attrs; ++i)
6762 info_ptr = read_attribute (&attr, &abbrev->attrs[i], abfd, info_ptr, cu);
6764 /* Store the data if it is of an attribute we want to keep in a
6765 partial symbol table. */
6769 switch (part_die->tag)
6771 case DW_TAG_compile_unit:
6772 case DW_TAG_type_unit:
6773 /* Compilation units have a DW_AT_name that is a filename, not
6774 a source language identifier. */
6775 case DW_TAG_enumeration_type:
6776 case DW_TAG_enumerator:
6777 /* These tags always have simple identifiers already; no need
6778 to canonicalize them. */
6779 part_die->name = DW_STRING (&attr);
6783 = dwarf2_canonicalize_name (DW_STRING (&attr), cu,
6784 &cu->comp_unit_obstack);
6788 case DW_AT_MIPS_linkage_name:
6789 part_die->name = DW_STRING (&attr);
6792 has_low_pc_attr = 1;
6793 part_die->lowpc = DW_ADDR (&attr);
6796 has_high_pc_attr = 1;
6797 part_die->highpc = DW_ADDR (&attr);
6799 case DW_AT_location:
6800 /* Support the .debug_loc offsets */
6801 if (attr_form_is_block (&attr))
6803 part_die->locdesc = DW_BLOCK (&attr);
6805 else if (attr_form_is_section_offset (&attr))
6807 dwarf2_complex_location_expr_complaint ();
6811 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
6812 "partial symbol information");
6815 case DW_AT_external:
6816 part_die->is_external = DW_UNSND (&attr);
6818 case DW_AT_declaration:
6819 part_die->is_declaration = DW_UNSND (&attr);
6822 part_die->has_type = 1;
6824 case DW_AT_abstract_origin:
6825 case DW_AT_specification:
6826 case DW_AT_extension:
6827 part_die->has_specification = 1;
6828 part_die->spec_offset = dwarf2_get_ref_die_offset (&attr);
6831 /* Ignore absolute siblings, they might point outside of
6832 the current compile unit. */
6833 if (attr.form == DW_FORM_ref_addr)
6834 complaint (&symfile_complaints, _("ignoring absolute DW_AT_sibling"));
6836 part_die->sibling = buffer + dwarf2_get_ref_die_offset (&attr);
6838 case DW_AT_byte_size:
6839 part_die->has_byte_size = 1;
6841 case DW_AT_calling_convention:
6842 /* DWARF doesn't provide a way to identify a program's source-level
6843 entry point. DW_AT_calling_convention attributes are only meant
6844 to describe functions' calling conventions.
6846 However, because it's a necessary piece of information in
6847 Fortran, and because DW_CC_program is the only piece of debugging
6848 information whose definition refers to a 'main program' at all,
6849 several compilers have begun marking Fortran main programs with
6850 DW_CC_program --- even when those functions use the standard
6851 calling conventions.
6853 So until DWARF specifies a way to provide this information and
6854 compilers pick up the new representation, we'll support this
6856 if (DW_UNSND (&attr) == DW_CC_program
6857 && cu->language == language_fortran)
6858 set_main_name (part_die->name);
6865 /* When using the GNU linker, .gnu.linkonce. sections are used to
6866 eliminate duplicate copies of functions and vtables and such.
6867 The linker will arbitrarily choose one and discard the others.
6868 The AT_*_pc values for such functions refer to local labels in
6869 these sections. If the section from that file was discarded, the
6870 labels are not in the output, so the relocs get a value of 0.
6871 If this is a discarded function, mark the pc bounds as invalid,
6872 so that GDB will ignore it. */
6873 if (has_low_pc_attr && has_high_pc_attr
6874 && part_die->lowpc < part_die->highpc
6875 && (part_die->lowpc != 0
6876 || dwarf2_per_objfile->has_section_at_zero))
6877 part_die->has_pc_info = 1;
6882 /* Find a cached partial DIE at OFFSET in CU. */
6884 static struct partial_die_info *
6885 find_partial_die_in_comp_unit (unsigned int offset, struct dwarf2_cu *cu)
6887 struct partial_die_info *lookup_die = NULL;
6888 struct partial_die_info part_die;
6890 part_die.offset = offset;
6891 lookup_die = htab_find_with_hash (cu->partial_dies, &part_die, offset);
6896 /* Find a partial DIE at OFFSET, which may or may not be in CU,
6897 except in the case of .debug_types DIEs which do not reference
6898 outside their CU (they do however referencing other types via
6901 static struct partial_die_info *
6902 find_partial_die (unsigned int offset, struct dwarf2_cu *cu)
6904 struct dwarf2_per_cu_data *per_cu = NULL;
6905 struct partial_die_info *pd = NULL;
6907 if (cu->per_cu->from_debug_types)
6909 pd = find_partial_die_in_comp_unit (offset, cu);
6915 if (offset_in_cu_p (&cu->header, offset))
6917 pd = find_partial_die_in_comp_unit (offset, cu);
6922 per_cu = dwarf2_find_containing_comp_unit (offset, cu->objfile);
6924 if (per_cu->cu == NULL)
6926 load_partial_comp_unit (per_cu, cu->objfile);
6927 per_cu->cu->read_in_chain = dwarf2_per_objfile->read_in_chain;
6928 dwarf2_per_objfile->read_in_chain = per_cu;
6931 per_cu->cu->last_used = 0;
6932 pd = find_partial_die_in_comp_unit (offset, per_cu->cu);
6934 if (pd == NULL && per_cu->load_all_dies == 0)
6936 struct cleanup *back_to;
6937 struct partial_die_info comp_unit_die;
6938 struct abbrev_info *abbrev;
6939 unsigned int bytes_read;
6942 per_cu->load_all_dies = 1;
6944 /* Re-read the DIEs. */
6945 back_to = make_cleanup (null_cleanup, 0);
6946 if (per_cu->cu->dwarf2_abbrevs == NULL)
6948 dwarf2_read_abbrevs (per_cu->cu->objfile->obfd, per_cu->cu);
6949 make_cleanup (dwarf2_free_abbrev_table, per_cu->cu);
6951 info_ptr = (dwarf2_per_objfile->info.buffer
6952 + per_cu->cu->header.offset
6953 + per_cu->cu->header.first_die_offset);
6954 abbrev = peek_die_abbrev (info_ptr, &bytes_read, per_cu->cu);
6955 info_ptr = read_partial_die (&comp_unit_die, abbrev, bytes_read,
6956 per_cu->cu->objfile->obfd,
6957 dwarf2_per_objfile->info.buffer, info_ptr,
6959 if (comp_unit_die.has_children)
6960 load_partial_dies (per_cu->cu->objfile->obfd,
6961 dwarf2_per_objfile->info.buffer, info_ptr,
6963 do_cleanups (back_to);
6965 pd = find_partial_die_in_comp_unit (offset, per_cu->cu);
6971 internal_error (__FILE__, __LINE__,
6972 _("could not find partial DIE 0x%x in cache [from module %s]\n"),
6973 offset, bfd_get_filename (cu->objfile->obfd));
6977 /* Adjust PART_DIE before generating a symbol for it. This function
6978 may set the is_external flag or change the DIE's name. */
6981 fixup_partial_die (struct partial_die_info *part_die,
6982 struct dwarf2_cu *cu)
6984 /* If we found a reference attribute and the DIE has no name, try
6985 to find a name in the referred to DIE. */
6987 if (part_die->name == NULL && part_die->has_specification)
6989 struct partial_die_info *spec_die;
6991 spec_die = find_partial_die (part_die->spec_offset, cu);
6993 fixup_partial_die (spec_die, cu);
6997 part_die->name = spec_die->name;
6999 /* Copy DW_AT_external attribute if it is set. */
7000 if (spec_die->is_external)
7001 part_die->is_external = spec_die->is_external;
7005 /* Set default names for some unnamed DIEs. */
7006 if (part_die->name == NULL && (part_die->tag == DW_TAG_structure_type
7007 || part_die->tag == DW_TAG_class_type))
7008 part_die->name = "(anonymous class)";
7010 if (part_die->name == NULL && part_die->tag == DW_TAG_namespace)
7011 part_die->name = "(anonymous namespace)";
7013 if (part_die->tag == DW_TAG_structure_type
7014 || part_die->tag == DW_TAG_class_type
7015 || part_die->tag == DW_TAG_union_type)
7016 guess_structure_name (part_die, cu);
7019 /* Read an attribute value described by an attribute form. */
7022 read_attribute_value (struct attribute *attr, unsigned form,
7023 bfd *abfd, gdb_byte *info_ptr,
7024 struct dwarf2_cu *cu)
7026 struct comp_unit_head *cu_header = &cu->header;
7027 unsigned int bytes_read;
7028 struct dwarf_block *blk;
7034 case DW_FORM_ref_addr:
7035 DW_ADDR (attr) = read_address (abfd, info_ptr, cu, &bytes_read);
7036 info_ptr += bytes_read;
7038 case DW_FORM_block2:
7039 blk = dwarf_alloc_block (cu);
7040 blk->size = read_2_bytes (abfd, info_ptr);
7042 blk->data = read_n_bytes (abfd, info_ptr, blk->size);
7043 info_ptr += blk->size;
7044 DW_BLOCK (attr) = blk;
7046 case DW_FORM_block4:
7047 blk = dwarf_alloc_block (cu);
7048 blk->size = read_4_bytes (abfd, info_ptr);
7050 blk->data = read_n_bytes (abfd, info_ptr, blk->size);
7051 info_ptr += blk->size;
7052 DW_BLOCK (attr) = blk;
7055 DW_UNSND (attr) = read_2_bytes (abfd, info_ptr);
7059 DW_UNSND (attr) = read_4_bytes (abfd, info_ptr);
7063 DW_UNSND (attr) = read_8_bytes (abfd, info_ptr);
7066 case DW_FORM_string:
7067 DW_STRING (attr) = read_string (abfd, info_ptr, &bytes_read);
7068 DW_STRING_IS_CANONICAL (attr) = 0;
7069 info_ptr += bytes_read;
7072 DW_STRING (attr) = read_indirect_string (abfd, info_ptr, cu_header,
7074 DW_STRING_IS_CANONICAL (attr) = 0;
7075 info_ptr += bytes_read;
7078 blk = dwarf_alloc_block (cu);
7079 blk->size = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
7080 info_ptr += bytes_read;
7081 blk->data = read_n_bytes (abfd, info_ptr, blk->size);
7082 info_ptr += blk->size;
7083 DW_BLOCK (attr) = blk;
7085 case DW_FORM_block1:
7086 blk = dwarf_alloc_block (cu);
7087 blk->size = read_1_byte (abfd, info_ptr);
7089 blk->data = read_n_bytes (abfd, info_ptr, blk->size);
7090 info_ptr += blk->size;
7091 DW_BLOCK (attr) = blk;
7094 DW_UNSND (attr) = read_1_byte (abfd, info_ptr);
7098 DW_UNSND (attr) = read_1_byte (abfd, info_ptr);
7102 DW_SND (attr) = read_signed_leb128 (abfd, info_ptr, &bytes_read);
7103 info_ptr += bytes_read;
7106 DW_UNSND (attr) = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
7107 info_ptr += bytes_read;
7110 DW_ADDR (attr) = cu->header.offset + read_1_byte (abfd, info_ptr);
7114 DW_ADDR (attr) = cu->header.offset + read_2_bytes (abfd, info_ptr);
7118 DW_ADDR (attr) = cu->header.offset + read_4_bytes (abfd, info_ptr);
7122 DW_ADDR (attr) = cu->header.offset + read_8_bytes (abfd, info_ptr);
7126 /* Convert the signature to something we can record in DW_UNSND
7128 NOTE: This is NULL if the type wasn't found. */
7129 DW_SIGNATURED_TYPE (attr) =
7130 lookup_signatured_type (cu->objfile, read_8_bytes (abfd, info_ptr));
7133 case DW_FORM_ref_udata:
7134 DW_ADDR (attr) = (cu->header.offset
7135 + read_unsigned_leb128 (abfd, info_ptr, &bytes_read));
7136 info_ptr += bytes_read;
7138 case DW_FORM_indirect:
7139 form = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
7140 info_ptr += bytes_read;
7141 info_ptr = read_attribute_value (attr, form, abfd, info_ptr, cu);
7144 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
7145 dwarf_form_name (form),
7146 bfd_get_filename (abfd));
7149 /* We have seen instances where the compiler tried to emit a byte
7150 size attribute of -1 which ended up being encoded as an unsigned
7151 0xffffffff. Although 0xffffffff is technically a valid size value,
7152 an object of this size seems pretty unlikely so we can relatively
7153 safely treat these cases as if the size attribute was invalid and
7154 treat them as zero by default. */
7155 if (attr->name == DW_AT_byte_size
7156 && form == DW_FORM_data4
7157 && DW_UNSND (attr) >= 0xffffffff)
7160 (&symfile_complaints,
7161 _("Suspicious DW_AT_byte_size value treated as zero instead of %s"),
7162 hex_string (DW_UNSND (attr)));
7163 DW_UNSND (attr) = 0;
7169 /* Read an attribute described by an abbreviated attribute. */
7172 read_attribute (struct attribute *attr, struct attr_abbrev *abbrev,
7173 bfd *abfd, gdb_byte *info_ptr, struct dwarf2_cu *cu)
7175 attr->name = abbrev->name;
7176 return read_attribute_value (attr, abbrev->form, abfd, info_ptr, cu);
7179 /* read dwarf information from a buffer */
7182 read_1_byte (bfd *abfd, gdb_byte *buf)
7184 return bfd_get_8 (abfd, buf);
7188 read_1_signed_byte (bfd *abfd, gdb_byte *buf)
7190 return bfd_get_signed_8 (abfd, buf);
7194 read_2_bytes (bfd *abfd, gdb_byte *buf)
7196 return bfd_get_16 (abfd, buf);
7200 read_2_signed_bytes (bfd *abfd, gdb_byte *buf)
7202 return bfd_get_signed_16 (abfd, buf);
7206 read_4_bytes (bfd *abfd, gdb_byte *buf)
7208 return bfd_get_32 (abfd, buf);
7212 read_4_signed_bytes (bfd *abfd, gdb_byte *buf)
7214 return bfd_get_signed_32 (abfd, buf);
7218 read_8_bytes (bfd *abfd, gdb_byte *buf)
7220 return bfd_get_64 (abfd, buf);
7224 read_address (bfd *abfd, gdb_byte *buf, struct dwarf2_cu *cu,
7225 unsigned int *bytes_read)
7227 struct comp_unit_head *cu_header = &cu->header;
7228 CORE_ADDR retval = 0;
7230 if (cu_header->signed_addr_p)
7232 switch (cu_header->addr_size)
7235 retval = bfd_get_signed_16 (abfd, buf);
7238 retval = bfd_get_signed_32 (abfd, buf);
7241 retval = bfd_get_signed_64 (abfd, buf);
7244 internal_error (__FILE__, __LINE__,
7245 _("read_address: bad switch, signed [in module %s]"),
7246 bfd_get_filename (abfd));
7251 switch (cu_header->addr_size)
7254 retval = bfd_get_16 (abfd, buf);
7257 retval = bfd_get_32 (abfd, buf);
7260 retval = bfd_get_64 (abfd, buf);
7263 internal_error (__FILE__, __LINE__,
7264 _("read_address: bad switch, unsigned [in module %s]"),
7265 bfd_get_filename (abfd));
7269 *bytes_read = cu_header->addr_size;
7273 /* Read the initial length from a section. The (draft) DWARF 3
7274 specification allows the initial length to take up either 4 bytes
7275 or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8
7276 bytes describe the length and all offsets will be 8 bytes in length
7279 An older, non-standard 64-bit format is also handled by this
7280 function. The older format in question stores the initial length
7281 as an 8-byte quantity without an escape value. Lengths greater
7282 than 2^32 aren't very common which means that the initial 4 bytes
7283 is almost always zero. Since a length value of zero doesn't make
7284 sense for the 32-bit format, this initial zero can be considered to
7285 be an escape value which indicates the presence of the older 64-bit
7286 format. As written, the code can't detect (old format) lengths
7287 greater than 4GB. If it becomes necessary to handle lengths
7288 somewhat larger than 4GB, we could allow other small values (such
7289 as the non-sensical values of 1, 2, and 3) to also be used as
7290 escape values indicating the presence of the old format.
7292 The value returned via bytes_read should be used to increment the
7293 relevant pointer after calling read_initial_length().
7295 [ Note: read_initial_length() and read_offset() are based on the
7296 document entitled "DWARF Debugging Information Format", revision
7297 3, draft 8, dated November 19, 2001. This document was obtained
7300 http://reality.sgiweb.org/davea/dwarf3-draft8-011125.pdf
7302 This document is only a draft and is subject to change. (So beware.)
7304 Details regarding the older, non-standard 64-bit format were
7305 determined empirically by examining 64-bit ELF files produced by
7306 the SGI toolchain on an IRIX 6.5 machine.
7308 - Kevin, July 16, 2002
7312 read_initial_length (bfd *abfd, gdb_byte *buf, unsigned int *bytes_read)
7314 LONGEST length = bfd_get_32 (abfd, buf);
7316 if (length == 0xffffffff)
7318 length = bfd_get_64 (abfd, buf + 4);
7321 else if (length == 0)
7323 /* Handle the (non-standard) 64-bit DWARF2 format used by IRIX. */
7324 length = bfd_get_64 (abfd, buf);
7335 /* Cover function for read_initial_length.
7336 Returns the length of the object at BUF, and stores the size of the
7337 initial length in *BYTES_READ and stores the size that offsets will be in
7339 If the initial length size is not equivalent to that specified in
7340 CU_HEADER then issue a complaint.
7341 This is useful when reading non-comp-unit headers. */
7344 read_checked_initial_length_and_offset (bfd *abfd, gdb_byte *buf,
7345 const struct comp_unit_head *cu_header,
7346 unsigned int *bytes_read,
7347 unsigned int *offset_size)
7349 LONGEST length = read_initial_length (abfd, buf, bytes_read);
7351 gdb_assert (cu_header->initial_length_size == 4
7352 || cu_header->initial_length_size == 8
7353 || cu_header->initial_length_size == 12);
7355 if (cu_header->initial_length_size != *bytes_read)
7356 complaint (&symfile_complaints,
7357 _("intermixed 32-bit and 64-bit DWARF sections"));
7359 *offset_size = (*bytes_read == 4) ? 4 : 8;
7363 /* Read an offset from the data stream. The size of the offset is
7364 given by cu_header->offset_size. */
7367 read_offset (bfd *abfd, gdb_byte *buf, const struct comp_unit_head *cu_header,
7368 unsigned int *bytes_read)
7370 LONGEST offset = read_offset_1 (abfd, buf, cu_header->offset_size);
7371 *bytes_read = cu_header->offset_size;
7375 /* Read an offset from the data stream. */
7378 read_offset_1 (bfd *abfd, gdb_byte *buf, unsigned int offset_size)
7382 switch (offset_size)
7385 retval = bfd_get_32 (abfd, buf);
7388 retval = bfd_get_64 (abfd, buf);
7391 internal_error (__FILE__, __LINE__,
7392 _("read_offset_1: bad switch [in module %s]"),
7393 bfd_get_filename (abfd));
7400 read_n_bytes (bfd *abfd, gdb_byte *buf, unsigned int size)
7402 /* If the size of a host char is 8 bits, we can return a pointer
7403 to the buffer, otherwise we have to copy the data to a buffer
7404 allocated on the temporary obstack. */
7405 gdb_assert (HOST_CHAR_BIT == 8);
7410 read_string (bfd *abfd, gdb_byte *buf, unsigned int *bytes_read_ptr)
7412 /* If the size of a host char is 8 bits, we can return a pointer
7413 to the string, otherwise we have to copy the string to a buffer
7414 allocated on the temporary obstack. */
7415 gdb_assert (HOST_CHAR_BIT == 8);
7418 *bytes_read_ptr = 1;
7421 *bytes_read_ptr = strlen ((char *) buf) + 1;
7422 return (char *) buf;
7426 read_indirect_string (bfd *abfd, gdb_byte *buf,
7427 const struct comp_unit_head *cu_header,
7428 unsigned int *bytes_read_ptr)
7430 LONGEST str_offset = read_offset (abfd, buf, cu_header, bytes_read_ptr);
7432 if (dwarf2_per_objfile->str.buffer == NULL)
7434 error (_("DW_FORM_strp used without .debug_str section [in module %s]"),
7435 bfd_get_filename (abfd));
7438 if (str_offset >= dwarf2_per_objfile->str.size)
7440 error (_("DW_FORM_strp pointing outside of .debug_str section [in module %s]"),
7441 bfd_get_filename (abfd));
7444 gdb_assert (HOST_CHAR_BIT == 8);
7445 if (dwarf2_per_objfile->str.buffer[str_offset] == '\0')
7447 return (char *) (dwarf2_per_objfile->str.buffer + str_offset);
7450 static unsigned long
7451 read_unsigned_leb128 (bfd *abfd, gdb_byte *buf, unsigned int *bytes_read_ptr)
7453 unsigned long result;
7454 unsigned int num_read;
7464 byte = bfd_get_8 (abfd, buf);
7467 result |= ((unsigned long)(byte & 127) << shift);
7468 if ((byte & 128) == 0)
7474 *bytes_read_ptr = num_read;
7479 read_signed_leb128 (bfd *abfd, gdb_byte *buf, unsigned int *bytes_read_ptr)
7482 int i, shift, num_read;
7491 byte = bfd_get_8 (abfd, buf);
7494 result |= ((long)(byte & 127) << shift);
7496 if ((byte & 128) == 0)
7501 if ((shift < 8 * sizeof (result)) && (byte & 0x40))
7502 result |= -(((long)1) << shift);
7503 *bytes_read_ptr = num_read;
7507 /* Return a pointer to just past the end of an LEB128 number in BUF. */
7510 skip_leb128 (bfd *abfd, gdb_byte *buf)
7516 byte = bfd_get_8 (abfd, buf);
7518 if ((byte & 128) == 0)
7524 set_cu_language (unsigned int lang, struct dwarf2_cu *cu)
7531 cu->language = language_c;
7533 case DW_LANG_C_plus_plus:
7534 cu->language = language_cplus;
7536 case DW_LANG_Fortran77:
7537 case DW_LANG_Fortran90:
7538 case DW_LANG_Fortran95:
7539 cu->language = language_fortran;
7541 case DW_LANG_Mips_Assembler:
7542 cu->language = language_asm;
7545 cu->language = language_java;
7549 cu->language = language_ada;
7551 case DW_LANG_Modula2:
7552 cu->language = language_m2;
7554 case DW_LANG_Pascal83:
7555 cu->language = language_pascal;
7558 cu->language = language_objc;
7560 case DW_LANG_Cobol74:
7561 case DW_LANG_Cobol85:
7563 cu->language = language_minimal;
7566 cu->language_defn = language_def (cu->language);
7569 /* Return the named attribute or NULL if not there. */
7571 static struct attribute *
7572 dwarf2_attr (struct die_info *die, unsigned int name, struct dwarf2_cu *cu)
7575 struct attribute *spec = NULL;
7577 for (i = 0; i < die->num_attrs; ++i)
7579 if (die->attrs[i].name == name)
7580 return &die->attrs[i];
7581 if (die->attrs[i].name == DW_AT_specification
7582 || die->attrs[i].name == DW_AT_abstract_origin)
7583 spec = &die->attrs[i];
7588 die = follow_die_ref (die, spec, &cu);
7589 return dwarf2_attr (die, name, cu);
7595 /* Return the named attribute or NULL if not there,
7596 but do not follow DW_AT_specification, etc.
7597 This is for use in contexts where we're reading .debug_types dies.
7598 Following DW_AT_specification, DW_AT_abstract_origin will take us
7599 back up the chain, and we want to go down. */
7601 static struct attribute *
7602 dwarf2_attr_no_follow (struct die_info *die, unsigned int name,
7603 struct dwarf2_cu *cu)
7607 for (i = 0; i < die->num_attrs; ++i)
7608 if (die->attrs[i].name == name)
7609 return &die->attrs[i];
7614 /* Return non-zero iff the attribute NAME is defined for the given DIE,
7615 and holds a non-zero value. This function should only be used for
7616 DW_FORM_flag attributes. */
7619 dwarf2_flag_true_p (struct die_info *die, unsigned name, struct dwarf2_cu *cu)
7621 struct attribute *attr = dwarf2_attr (die, name, cu);
7623 return (attr && DW_UNSND (attr));
7627 die_is_declaration (struct die_info *die, struct dwarf2_cu *cu)
7629 /* A DIE is a declaration if it has a DW_AT_declaration attribute
7630 which value is non-zero. However, we have to be careful with
7631 DIEs having a DW_AT_specification attribute, because dwarf2_attr()
7632 (via dwarf2_flag_true_p) follows this attribute. So we may
7633 end up accidently finding a declaration attribute that belongs
7634 to a different DIE referenced by the specification attribute,
7635 even though the given DIE does not have a declaration attribute. */
7636 return (dwarf2_flag_true_p (die, DW_AT_declaration, cu)
7637 && dwarf2_attr (die, DW_AT_specification, cu) == NULL);
7640 /* Return the die giving the specification for DIE, if there is
7641 one. *SPEC_CU is the CU containing DIE on input, and the CU
7642 containing the return value on output. If there is no
7643 specification, but there is an abstract origin, that is
7646 static struct die_info *
7647 die_specification (struct die_info *die, struct dwarf2_cu **spec_cu)
7649 struct attribute *spec_attr = dwarf2_attr (die, DW_AT_specification,
7652 if (spec_attr == NULL)
7653 spec_attr = dwarf2_attr (die, DW_AT_abstract_origin, *spec_cu);
7655 if (spec_attr == NULL)
7658 return follow_die_ref (die, spec_attr, spec_cu);
7661 /* Free the line_header structure *LH, and any arrays and strings it
7664 free_line_header (struct line_header *lh)
7666 if (lh->standard_opcode_lengths)
7667 xfree (lh->standard_opcode_lengths);
7669 /* Remember that all the lh->file_names[i].name pointers are
7670 pointers into debug_line_buffer, and don't need to be freed. */
7672 xfree (lh->file_names);
7674 /* Similarly for the include directory names. */
7675 if (lh->include_dirs)
7676 xfree (lh->include_dirs);
7682 /* Add an entry to LH's include directory table. */
7684 add_include_dir (struct line_header *lh, char *include_dir)
7686 /* Grow the array if necessary. */
7687 if (lh->include_dirs_size == 0)
7689 lh->include_dirs_size = 1; /* for testing */
7690 lh->include_dirs = xmalloc (lh->include_dirs_size
7691 * sizeof (*lh->include_dirs));
7693 else if (lh->num_include_dirs >= lh->include_dirs_size)
7695 lh->include_dirs_size *= 2;
7696 lh->include_dirs = xrealloc (lh->include_dirs,
7697 (lh->include_dirs_size
7698 * sizeof (*lh->include_dirs)));
7701 lh->include_dirs[lh->num_include_dirs++] = include_dir;
7705 /* Add an entry to LH's file name table. */
7707 add_file_name (struct line_header *lh,
7709 unsigned int dir_index,
7710 unsigned int mod_time,
7711 unsigned int length)
7713 struct file_entry *fe;
7715 /* Grow the array if necessary. */
7716 if (lh->file_names_size == 0)
7718 lh->file_names_size = 1; /* for testing */
7719 lh->file_names = xmalloc (lh->file_names_size
7720 * sizeof (*lh->file_names));
7722 else if (lh->num_file_names >= lh->file_names_size)
7724 lh->file_names_size *= 2;
7725 lh->file_names = xrealloc (lh->file_names,
7726 (lh->file_names_size
7727 * sizeof (*lh->file_names)));
7730 fe = &lh->file_names[lh->num_file_names++];
7732 fe->dir_index = dir_index;
7733 fe->mod_time = mod_time;
7734 fe->length = length;
7740 /* Read the statement program header starting at OFFSET in
7741 .debug_line, according to the endianness of ABFD. Return a pointer
7742 to a struct line_header, allocated using xmalloc.
7744 NOTE: the strings in the include directory and file name tables of
7745 the returned object point into debug_line_buffer, and must not be
7747 static struct line_header *
7748 dwarf_decode_line_header (unsigned int offset, bfd *abfd,
7749 struct dwarf2_cu *cu)
7751 struct cleanup *back_to;
7752 struct line_header *lh;
7754 unsigned int bytes_read, offset_size;
7756 char *cur_dir, *cur_file;
7758 if (dwarf2_per_objfile->line.buffer == NULL)
7760 complaint (&symfile_complaints, _("missing .debug_line section"));
7764 /* Make sure that at least there's room for the total_length field.
7765 That could be 12 bytes long, but we're just going to fudge that. */
7766 if (offset + 4 >= dwarf2_per_objfile->line.size)
7768 dwarf2_statement_list_fits_in_line_number_section_complaint ();
7772 lh = xmalloc (sizeof (*lh));
7773 memset (lh, 0, sizeof (*lh));
7774 back_to = make_cleanup ((make_cleanup_ftype *) free_line_header,
7777 line_ptr = dwarf2_per_objfile->line.buffer + offset;
7779 /* Read in the header. */
7781 read_checked_initial_length_and_offset (abfd, line_ptr, &cu->header,
7782 &bytes_read, &offset_size);
7783 line_ptr += bytes_read;
7784 if (line_ptr + lh->total_length > (dwarf2_per_objfile->line.buffer
7785 + dwarf2_per_objfile->line.size))
7787 dwarf2_statement_list_fits_in_line_number_section_complaint ();
7790 lh->statement_program_end = line_ptr + lh->total_length;
7791 lh->version = read_2_bytes (abfd, line_ptr);
7793 lh->header_length = read_offset_1 (abfd, line_ptr, offset_size);
7794 line_ptr += offset_size;
7795 lh->minimum_instruction_length = read_1_byte (abfd, line_ptr);
7797 lh->default_is_stmt = read_1_byte (abfd, line_ptr);
7799 lh->line_base = read_1_signed_byte (abfd, line_ptr);
7801 lh->line_range = read_1_byte (abfd, line_ptr);
7803 lh->opcode_base = read_1_byte (abfd, line_ptr);
7805 lh->standard_opcode_lengths
7806 = xmalloc (lh->opcode_base * sizeof (lh->standard_opcode_lengths[0]));
7808 lh->standard_opcode_lengths[0] = 1; /* This should never be used anyway. */
7809 for (i = 1; i < lh->opcode_base; ++i)
7811 lh->standard_opcode_lengths[i] = read_1_byte (abfd, line_ptr);
7815 /* Read directory table. */
7816 while ((cur_dir = read_string (abfd, line_ptr, &bytes_read)) != NULL)
7818 line_ptr += bytes_read;
7819 add_include_dir (lh, cur_dir);
7821 line_ptr += bytes_read;
7823 /* Read file name table. */
7824 while ((cur_file = read_string (abfd, line_ptr, &bytes_read)) != NULL)
7826 unsigned int dir_index, mod_time, length;
7828 line_ptr += bytes_read;
7829 dir_index = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
7830 line_ptr += bytes_read;
7831 mod_time = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
7832 line_ptr += bytes_read;
7833 length = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
7834 line_ptr += bytes_read;
7836 add_file_name (lh, cur_file, dir_index, mod_time, length);
7838 line_ptr += bytes_read;
7839 lh->statement_program_start = line_ptr;
7841 if (line_ptr > (dwarf2_per_objfile->line.buffer
7842 + dwarf2_per_objfile->line.size))
7843 complaint (&symfile_complaints,
7844 _("line number info header doesn't fit in `.debug_line' section"));
7846 discard_cleanups (back_to);
7850 /* This function exists to work around a bug in certain compilers
7851 (particularly GCC 2.95), in which the first line number marker of a
7852 function does not show up until after the prologue, right before
7853 the second line number marker. This function shifts ADDRESS down
7854 to the beginning of the function if necessary, and is called on
7855 addresses passed to record_line. */
7858 check_cu_functions (CORE_ADDR address, struct dwarf2_cu *cu)
7860 struct function_range *fn;
7862 /* Find the function_range containing address. */
7867 cu->cached_fn = cu->first_fn;
7871 if (fn->lowpc <= address && fn->highpc > address)
7877 while (fn && fn != cu->cached_fn)
7878 if (fn->lowpc <= address && fn->highpc > address)
7888 if (address != fn->lowpc)
7889 complaint (&symfile_complaints,
7890 _("misplaced first line number at 0x%lx for '%s'"),
7891 (unsigned long) address, fn->name);
7896 /* Decode the Line Number Program (LNP) for the given line_header
7897 structure and CU. The actual information extracted and the type
7898 of structures created from the LNP depends on the value of PST.
7900 1. If PST is NULL, then this procedure uses the data from the program
7901 to create all necessary symbol tables, and their linetables.
7902 The compilation directory of the file is passed in COMP_DIR,
7903 and must not be NULL.
7905 2. If PST is not NULL, this procedure reads the program to determine
7906 the list of files included by the unit represented by PST, and
7907 builds all the associated partial symbol tables. In this case,
7908 the value of COMP_DIR is ignored, and can thus be NULL (the COMP_DIR
7909 is not used to compute the full name of the symtab, and therefore
7910 omitting it when building the partial symtab does not introduce
7911 the potential for inconsistency - a partial symtab and its associated
7912 symbtab having a different fullname -). */
7915 dwarf_decode_lines (struct line_header *lh, char *comp_dir, bfd *abfd,
7916 struct dwarf2_cu *cu, struct partial_symtab *pst)
7918 gdb_byte *line_ptr, *extended_end;
7920 unsigned int bytes_read, extended_len;
7921 unsigned char op_code, extended_op, adj_opcode;
7923 struct objfile *objfile = cu->objfile;
7924 struct gdbarch *gdbarch = get_objfile_arch (objfile);
7925 const int decode_for_pst_p = (pst != NULL);
7926 struct subfile *last_subfile = NULL, *first_subfile = current_subfile;
7928 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
7930 line_ptr = lh->statement_program_start;
7931 line_end = lh->statement_program_end;
7933 /* Read the statement sequences until there's nothing left. */
7934 while (line_ptr < line_end)
7936 /* state machine registers */
7937 CORE_ADDR address = 0;
7938 unsigned int file = 1;
7939 unsigned int line = 1;
7940 unsigned int column = 0;
7941 int is_stmt = lh->default_is_stmt;
7942 int basic_block = 0;
7943 int end_sequence = 0;
7946 if (!decode_for_pst_p && lh->num_file_names >= file)
7948 /* Start a subfile for the current file of the state machine. */
7949 /* lh->include_dirs and lh->file_names are 0-based, but the
7950 directory and file name numbers in the statement program
7952 struct file_entry *fe = &lh->file_names[file - 1];
7956 dir = lh->include_dirs[fe->dir_index - 1];
7958 dwarf2_start_subfile (fe->name, dir, comp_dir);
7961 /* Decode the table. */
7962 while (!end_sequence)
7964 op_code = read_1_byte (abfd, line_ptr);
7966 if (line_ptr > line_end)
7968 dwarf2_debug_line_missing_end_sequence_complaint ();
7972 if (op_code >= lh->opcode_base)
7974 /* Special operand. */
7975 adj_opcode = op_code - lh->opcode_base;
7976 address += (adj_opcode / lh->line_range)
7977 * lh->minimum_instruction_length;
7978 line += lh->line_base + (adj_opcode % lh->line_range);
7979 if (lh->num_file_names < file || file == 0)
7980 dwarf2_debug_line_missing_file_complaint ();
7983 lh->file_names[file - 1].included_p = 1;
7984 if (!decode_for_pst_p && is_stmt)
7986 if (last_subfile != current_subfile)
7988 addr = gdbarch_addr_bits_remove (gdbarch, address);
7990 record_line (last_subfile, 0, addr);
7991 last_subfile = current_subfile;
7993 /* Append row to matrix using current values. */
7994 addr = check_cu_functions (address, cu);
7995 addr = gdbarch_addr_bits_remove (gdbarch, addr);
7996 record_line (current_subfile, line, addr);
8001 else switch (op_code)
8003 case DW_LNS_extended_op:
8004 extended_len = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
8005 line_ptr += bytes_read;
8006 extended_end = line_ptr + extended_len;
8007 extended_op = read_1_byte (abfd, line_ptr);
8009 switch (extended_op)
8011 case DW_LNE_end_sequence:
8014 case DW_LNE_set_address:
8015 address = read_address (abfd, line_ptr, cu, &bytes_read);
8016 line_ptr += bytes_read;
8017 address += baseaddr;
8019 case DW_LNE_define_file:
8022 unsigned int dir_index, mod_time, length;
8024 cur_file = read_string (abfd, line_ptr, &bytes_read);
8025 line_ptr += bytes_read;
8027 read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
8028 line_ptr += bytes_read;
8030 read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
8031 line_ptr += bytes_read;
8033 read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
8034 line_ptr += bytes_read;
8035 add_file_name (lh, cur_file, dir_index, mod_time, length);
8038 case DW_LNE_set_discriminator:
8039 /* The discriminator is not interesting to the debugger;
8041 line_ptr = extended_end;
8044 complaint (&symfile_complaints,
8045 _("mangled .debug_line section"));
8048 /* Make sure that we parsed the extended op correctly. If e.g.
8049 we expected a different address size than the producer used,
8050 we may have read the wrong number of bytes. */
8051 if (line_ptr != extended_end)
8053 complaint (&symfile_complaints,
8054 _("mangled .debug_line section"));
8059 if (lh->num_file_names < file || file == 0)
8060 dwarf2_debug_line_missing_file_complaint ();
8063 lh->file_names[file - 1].included_p = 1;
8064 if (!decode_for_pst_p && is_stmt)
8066 if (last_subfile != current_subfile)
8068 addr = gdbarch_addr_bits_remove (gdbarch, address);
8070 record_line (last_subfile, 0, addr);
8071 last_subfile = current_subfile;
8073 addr = check_cu_functions (address, cu);
8074 addr = gdbarch_addr_bits_remove (gdbarch, addr);
8075 record_line (current_subfile, line, addr);
8080 case DW_LNS_advance_pc:
8081 address += lh->minimum_instruction_length
8082 * read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
8083 line_ptr += bytes_read;
8085 case DW_LNS_advance_line:
8086 line += read_signed_leb128 (abfd, line_ptr, &bytes_read);
8087 line_ptr += bytes_read;
8089 case DW_LNS_set_file:
8091 /* The arrays lh->include_dirs and lh->file_names are
8092 0-based, but the directory and file name numbers in
8093 the statement program are 1-based. */
8094 struct file_entry *fe;
8097 file = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
8098 line_ptr += bytes_read;
8099 if (lh->num_file_names < file || file == 0)
8100 dwarf2_debug_line_missing_file_complaint ();
8103 fe = &lh->file_names[file - 1];
8105 dir = lh->include_dirs[fe->dir_index - 1];
8106 if (!decode_for_pst_p)
8108 last_subfile = current_subfile;
8109 dwarf2_start_subfile (fe->name, dir, comp_dir);
8114 case DW_LNS_set_column:
8115 column = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
8116 line_ptr += bytes_read;
8118 case DW_LNS_negate_stmt:
8119 is_stmt = (!is_stmt);
8121 case DW_LNS_set_basic_block:
8124 /* Add to the address register of the state machine the
8125 address increment value corresponding to special opcode
8126 255. I.e., this value is scaled by the minimum
8127 instruction length since special opcode 255 would have
8128 scaled the the increment. */
8129 case DW_LNS_const_add_pc:
8130 address += (lh->minimum_instruction_length
8131 * ((255 - lh->opcode_base) / lh->line_range));
8133 case DW_LNS_fixed_advance_pc:
8134 address += read_2_bytes (abfd, line_ptr);
8139 /* Unknown standard opcode, ignore it. */
8142 for (i = 0; i < lh->standard_opcode_lengths[op_code]; i++)
8144 (void) read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
8145 line_ptr += bytes_read;
8150 if (lh->num_file_names < file || file == 0)
8151 dwarf2_debug_line_missing_file_complaint ();
8154 lh->file_names[file - 1].included_p = 1;
8155 if (!decode_for_pst_p)
8157 addr = gdbarch_addr_bits_remove (gdbarch, address);
8158 record_line (current_subfile, 0, addr);
8163 if (decode_for_pst_p)
8167 /* Now that we're done scanning the Line Header Program, we can
8168 create the psymtab of each included file. */
8169 for (file_index = 0; file_index < lh->num_file_names; file_index++)
8170 if (lh->file_names[file_index].included_p == 1)
8172 const struct file_entry fe = lh->file_names [file_index];
8173 char *include_name = fe.name;
8174 char *dir_name = NULL;
8175 char *pst_filename = pst->filename;
8178 dir_name = lh->include_dirs[fe.dir_index - 1];
8180 if (!IS_ABSOLUTE_PATH (include_name) && dir_name != NULL)
8182 include_name = concat (dir_name, SLASH_STRING,
8183 include_name, (char *)NULL);
8184 make_cleanup (xfree, include_name);
8187 if (!IS_ABSOLUTE_PATH (pst_filename) && pst->dirname != NULL)
8189 pst_filename = concat (pst->dirname, SLASH_STRING,
8190 pst_filename, (char *)NULL);
8191 make_cleanup (xfree, pst_filename);
8194 if (strcmp (include_name, pst_filename) != 0)
8195 dwarf2_create_include_psymtab (include_name, pst, objfile);
8200 /* Make sure a symtab is created for every file, even files
8201 which contain only variables (i.e. no code with associated
8205 struct file_entry *fe;
8207 for (i = 0; i < lh->num_file_names; i++)
8210 fe = &lh->file_names[i];
8212 dir = lh->include_dirs[fe->dir_index - 1];
8213 dwarf2_start_subfile (fe->name, dir, comp_dir);
8215 /* Skip the main file; we don't need it, and it must be
8216 allocated last, so that it will show up before the
8217 non-primary symtabs in the objfile's symtab list. */
8218 if (current_subfile == first_subfile)
8221 if (current_subfile->symtab == NULL)
8222 current_subfile->symtab = allocate_symtab (current_subfile->name,
8224 fe->symtab = current_subfile->symtab;
8229 /* Start a subfile for DWARF. FILENAME is the name of the file and
8230 DIRNAME the name of the source directory which contains FILENAME
8231 or NULL if not known. COMP_DIR is the compilation directory for the
8232 linetable's compilation unit or NULL if not known.
8233 This routine tries to keep line numbers from identical absolute and
8234 relative file names in a common subfile.
8236 Using the `list' example from the GDB testsuite, which resides in
8237 /srcdir and compiling it with Irix6.2 cc in /compdir using a filename
8238 of /srcdir/list0.c yields the following debugging information for list0.c:
8240 DW_AT_name: /srcdir/list0.c
8241 DW_AT_comp_dir: /compdir
8242 files.files[0].name: list0.h
8243 files.files[0].dir: /srcdir
8244 files.files[1].name: list0.c
8245 files.files[1].dir: /srcdir
8247 The line number information for list0.c has to end up in a single
8248 subfile, so that `break /srcdir/list0.c:1' works as expected.
8249 start_subfile will ensure that this happens provided that we pass the
8250 concatenation of files.files[1].dir and files.files[1].name as the
8254 dwarf2_start_subfile (char *filename, char *dirname, char *comp_dir)
8258 /* While reading the DIEs, we call start_symtab(DW_AT_name, DW_AT_comp_dir).
8259 `start_symtab' will always pass the contents of DW_AT_comp_dir as
8260 second argument to start_subfile. To be consistent, we do the
8261 same here. In order not to lose the line information directory,
8262 we concatenate it to the filename when it makes sense.
8263 Note that the Dwarf3 standard says (speaking of filenames in line
8264 information): ``The directory index is ignored for file names
8265 that represent full path names''. Thus ignoring dirname in the
8266 `else' branch below isn't an issue. */
8268 if (!IS_ABSOLUTE_PATH (filename) && dirname != NULL)
8269 fullname = concat (dirname, SLASH_STRING, filename, (char *)NULL);
8271 fullname = filename;
8273 start_subfile (fullname, comp_dir);
8275 if (fullname != filename)
8280 var_decode_location (struct attribute *attr, struct symbol *sym,
8281 struct dwarf2_cu *cu)
8283 struct objfile *objfile = cu->objfile;
8284 struct comp_unit_head *cu_header = &cu->header;
8286 /* NOTE drow/2003-01-30: There used to be a comment and some special
8287 code here to turn a symbol with DW_AT_external and a
8288 SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was
8289 necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux
8290 with some versions of binutils) where shared libraries could have
8291 relocations against symbols in their debug information - the
8292 minimal symbol would have the right address, but the debug info
8293 would not. It's no longer necessary, because we will explicitly
8294 apply relocations when we read in the debug information now. */
8296 /* A DW_AT_location attribute with no contents indicates that a
8297 variable has been optimized away. */
8298 if (attr_form_is_block (attr) && DW_BLOCK (attr)->size == 0)
8300 SYMBOL_CLASS (sym) = LOC_OPTIMIZED_OUT;
8304 /* Handle one degenerate form of location expression specially, to
8305 preserve GDB's previous behavior when section offsets are
8306 specified. If this is just a DW_OP_addr then mark this symbol
8309 if (attr_form_is_block (attr)
8310 && DW_BLOCK (attr)->size == 1 + cu_header->addr_size
8311 && DW_BLOCK (attr)->data[0] == DW_OP_addr)
8315 SYMBOL_VALUE_ADDRESS (sym) =
8316 read_address (objfile->obfd, DW_BLOCK (attr)->data + 1, cu, &dummy);
8317 SYMBOL_CLASS (sym) = LOC_STATIC;
8318 fixup_symbol_section (sym, objfile);
8319 SYMBOL_VALUE_ADDRESS (sym) += ANOFFSET (objfile->section_offsets,
8320 SYMBOL_SECTION (sym));
8324 /* NOTE drow/2002-01-30: It might be worthwhile to have a static
8325 expression evaluator, and use LOC_COMPUTED only when necessary
8326 (i.e. when the value of a register or memory location is
8327 referenced, or a thread-local block, etc.). Then again, it might
8328 not be worthwhile. I'm assuming that it isn't unless performance
8329 or memory numbers show me otherwise. */
8331 dwarf2_symbol_mark_computed (attr, sym, cu);
8332 SYMBOL_CLASS (sym) = LOC_COMPUTED;
8335 /* Given a pointer to a DWARF information entry, figure out if we need
8336 to make a symbol table entry for it, and if so, create a new entry
8337 and return a pointer to it.
8338 If TYPE is NULL, determine symbol type from the die, otherwise
8339 used the passed type. */
8341 static struct symbol *
8342 new_symbol (struct die_info *die, struct type *type, struct dwarf2_cu *cu)
8344 struct objfile *objfile = cu->objfile;
8345 struct symbol *sym = NULL;
8347 struct attribute *attr = NULL;
8348 struct attribute *attr2 = NULL;
8350 int inlined_func = (die->tag == DW_TAG_inlined_subroutine);
8352 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
8354 if (die->tag != DW_TAG_namespace)
8355 name = dwarf2_linkage_name (die, cu);
8357 name = TYPE_NAME (type);
8361 sym = (struct symbol *) obstack_alloc (&objfile->objfile_obstack,
8362 sizeof (struct symbol));
8363 OBJSTAT (objfile, n_syms++);
8364 memset (sym, 0, sizeof (struct symbol));
8366 /* Cache this symbol's name and the name's demangled form (if any). */
8367 SYMBOL_LANGUAGE (sym) = cu->language;
8368 SYMBOL_SET_NAMES (sym, name, strlen (name), 0, objfile);
8370 /* Default assumptions.
8371 Use the passed type or decode it from the die. */
8372 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
8373 SYMBOL_CLASS (sym) = LOC_OPTIMIZED_OUT;
8375 SYMBOL_TYPE (sym) = type;
8377 SYMBOL_TYPE (sym) = die_type (die, cu);
8378 attr = dwarf2_attr (die,
8379 inlined_func ? DW_AT_call_line : DW_AT_decl_line,
8383 SYMBOL_LINE (sym) = DW_UNSND (attr);
8386 attr = dwarf2_attr (die,
8387 inlined_func ? DW_AT_call_file : DW_AT_decl_file,
8391 int file_index = DW_UNSND (attr);
8392 if (cu->line_header == NULL
8393 || file_index > cu->line_header->num_file_names)
8394 complaint (&symfile_complaints,
8395 _("file index out of range"));
8396 else if (file_index > 0)
8398 struct file_entry *fe;
8399 fe = &cu->line_header->file_names[file_index - 1];
8400 SYMBOL_SYMTAB (sym) = fe->symtab;
8407 attr = dwarf2_attr (die, DW_AT_low_pc, cu);
8410 SYMBOL_VALUE_ADDRESS (sym) = DW_ADDR (attr) + baseaddr;
8412 SYMBOL_CLASS (sym) = LOC_LABEL;
8414 case DW_TAG_subprogram:
8415 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
8417 SYMBOL_CLASS (sym) = LOC_BLOCK;
8418 attr2 = dwarf2_attr (die, DW_AT_external, cu);
8419 if ((attr2 && (DW_UNSND (attr2) != 0))
8420 || cu->language == language_ada)
8422 /* Subprograms marked external are stored as a global symbol.
8423 Ada subprograms, whether marked external or not, are always
8424 stored as a global symbol, because we want to be able to
8425 access them globally. For instance, we want to be able
8426 to break on a nested subprogram without having to
8427 specify the context. */
8428 add_symbol_to_list (sym, &global_symbols);
8432 add_symbol_to_list (sym, cu->list_in_scope);
8435 case DW_TAG_inlined_subroutine:
8436 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
8438 SYMBOL_CLASS (sym) = LOC_BLOCK;
8439 SYMBOL_INLINED (sym) = 1;
8440 /* Do not add the symbol to any lists. It will be found via
8441 BLOCK_FUNCTION from the blockvector. */
8443 case DW_TAG_variable:
8444 /* Compilation with minimal debug info may result in variables
8445 with missing type entries. Change the misleading `void' type
8446 to something sensible. */
8447 if (TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_VOID)
8449 = objfile_type (objfile)->nodebug_data_symbol;
8451 attr = dwarf2_attr (die, DW_AT_const_value, cu);
8454 dwarf2_const_value (attr, sym, cu);
8455 attr2 = dwarf2_attr (die, DW_AT_external, cu);
8456 if (attr2 && (DW_UNSND (attr2) != 0))
8457 add_symbol_to_list (sym, &global_symbols);
8459 add_symbol_to_list (sym, cu->list_in_scope);
8462 attr = dwarf2_attr (die, DW_AT_location, cu);
8465 var_decode_location (attr, sym, cu);
8466 attr2 = dwarf2_attr (die, DW_AT_external, cu);
8467 if (attr2 && (DW_UNSND (attr2) != 0))
8468 add_symbol_to_list (sym, &global_symbols);
8470 add_symbol_to_list (sym, cu->list_in_scope);
8474 /* We do not know the address of this symbol.
8475 If it is an external symbol and we have type information
8476 for it, enter the symbol as a LOC_UNRESOLVED symbol.
8477 The address of the variable will then be determined from
8478 the minimal symbol table whenever the variable is
8480 attr2 = dwarf2_attr (die, DW_AT_external, cu);
8481 if (attr2 && (DW_UNSND (attr2) != 0)
8482 && dwarf2_attr (die, DW_AT_type, cu) != NULL)
8484 struct pending **list_to_add;
8486 /* A variable with DW_AT_external is never static, but it
8487 may be block-scoped. */
8488 list_to_add = (cu->list_in_scope == &file_symbols
8489 ? &global_symbols : cu->list_in_scope);
8491 SYMBOL_CLASS (sym) = LOC_UNRESOLVED;
8492 add_symbol_to_list (sym, list_to_add);
8494 else if (!die_is_declaration (die, cu))
8496 /* Use the default LOC_OPTIMIZED_OUT class. */
8497 gdb_assert (SYMBOL_CLASS (sym) == LOC_OPTIMIZED_OUT);
8498 add_symbol_to_list (sym, cu->list_in_scope);
8502 case DW_TAG_formal_parameter:
8503 /* If we are inside a function, mark this as an argument. If
8504 not, we might be looking at an argument to an inlined function
8505 when we do not have enough information to show inlined frames;
8506 pretend it's a local variable in that case so that the user can
8508 if (context_stack_depth > 0
8509 && context_stack[context_stack_depth - 1].name != NULL)
8510 SYMBOL_IS_ARGUMENT (sym) = 1;
8511 attr = dwarf2_attr (die, DW_AT_location, cu);
8514 var_decode_location (attr, sym, cu);
8516 attr = dwarf2_attr (die, DW_AT_const_value, cu);
8519 dwarf2_const_value (attr, sym, cu);
8521 add_symbol_to_list (sym, cu->list_in_scope);
8523 case DW_TAG_unspecified_parameters:
8524 /* From varargs functions; gdb doesn't seem to have any
8525 interest in this information, so just ignore it for now.
8528 case DW_TAG_class_type:
8529 case DW_TAG_interface_type:
8530 case DW_TAG_structure_type:
8531 case DW_TAG_union_type:
8532 case DW_TAG_set_type:
8533 case DW_TAG_enumeration_type:
8534 SYMBOL_CLASS (sym) = LOC_TYPEDEF;
8535 SYMBOL_DOMAIN (sym) = STRUCT_DOMAIN;
8537 /* Make sure that the symbol includes appropriate enclosing
8538 classes/namespaces in its name. These are calculated in
8539 read_structure_type, and the correct name is saved in
8542 if (cu->language == language_cplus
8543 || cu->language == language_java)
8545 struct type *type = SYMBOL_TYPE (sym);
8547 if (TYPE_TAG_NAME (type) != NULL)
8549 /* FIXME: carlton/2003-11-10: Should this use
8550 SYMBOL_SET_NAMES instead? (The same problem also
8551 arises further down in this function.) */
8552 /* The type's name is already allocated along with
8553 this objfile, so we don't need to duplicate it
8555 SYMBOL_LINKAGE_NAME (sym) = TYPE_TAG_NAME (type);
8560 /* NOTE: carlton/2003-11-10: C++ and Java class symbols shouldn't
8561 really ever be static objects: otherwise, if you try
8562 to, say, break of a class's method and you're in a file
8563 which doesn't mention that class, it won't work unless
8564 the check for all static symbols in lookup_symbol_aux
8565 saves you. See the OtherFileClass tests in
8566 gdb.c++/namespace.exp. */
8568 struct pending **list_to_add;
8570 list_to_add = (cu->list_in_scope == &file_symbols
8571 && (cu->language == language_cplus
8572 || cu->language == language_java)
8573 ? &global_symbols : cu->list_in_scope);
8575 add_symbol_to_list (sym, list_to_add);
8577 /* The semantics of C++ state that "struct foo { ... }" also
8578 defines a typedef for "foo". A Java class declaration also
8579 defines a typedef for the class. */
8580 if (cu->language == language_cplus
8581 || cu->language == language_java
8582 || cu->language == language_ada)
8584 /* The symbol's name is already allocated along with
8585 this objfile, so we don't need to duplicate it for
8587 if (TYPE_NAME (SYMBOL_TYPE (sym)) == 0)
8588 TYPE_NAME (SYMBOL_TYPE (sym)) = SYMBOL_SEARCH_NAME (sym);
8592 case DW_TAG_typedef:
8593 SYMBOL_LINKAGE_NAME (sym) = (char *) dwarf2_full_name (die, cu);
8594 SYMBOL_CLASS (sym) = LOC_TYPEDEF;
8595 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
8596 add_symbol_to_list (sym, cu->list_in_scope);
8598 case DW_TAG_base_type:
8599 case DW_TAG_subrange_type:
8600 SYMBOL_CLASS (sym) = LOC_TYPEDEF;
8601 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
8602 add_symbol_to_list (sym, cu->list_in_scope);
8604 case DW_TAG_enumerator:
8605 SYMBOL_LINKAGE_NAME (sym) = (char *) dwarf2_full_name (die, cu);
8606 attr = dwarf2_attr (die, DW_AT_const_value, cu);
8609 dwarf2_const_value (attr, sym, cu);
8612 /* NOTE: carlton/2003-11-10: See comment above in the
8613 DW_TAG_class_type, etc. block. */
8615 struct pending **list_to_add;
8617 list_to_add = (cu->list_in_scope == &file_symbols
8618 && (cu->language == language_cplus
8619 || cu->language == language_java)
8620 ? &global_symbols : cu->list_in_scope);
8622 add_symbol_to_list (sym, list_to_add);
8625 case DW_TAG_namespace:
8626 SYMBOL_CLASS (sym) = LOC_TYPEDEF;
8627 add_symbol_to_list (sym, &global_symbols);
8630 /* Not a tag we recognize. Hopefully we aren't processing
8631 trash data, but since we must specifically ignore things
8632 we don't recognize, there is nothing else we should do at
8634 complaint (&symfile_complaints, _("unsupported tag: '%s'"),
8635 dwarf_tag_name (die->tag));
8639 /* For the benefit of old versions of GCC, check for anonymous
8640 namespaces based on the demangled name. */
8641 if (!processing_has_namespace_info
8642 && cu->language == language_cplus
8643 && dwarf2_attr (die, DW_AT_MIPS_linkage_name, cu) != NULL)
8644 cp_scan_for_anonymous_namespaces (sym);
8649 /* Copy constant value from an attribute to a symbol. */
8652 dwarf2_const_value (struct attribute *attr, struct symbol *sym,
8653 struct dwarf2_cu *cu)
8655 struct objfile *objfile = cu->objfile;
8656 struct comp_unit_head *cu_header = &cu->header;
8657 enum bfd_endian byte_order = bfd_big_endian (objfile->obfd) ?
8658 BFD_ENDIAN_BIG : BFD_ENDIAN_LITTLE;
8659 struct dwarf_block *blk;
8664 if (TYPE_LENGTH (SYMBOL_TYPE (sym)) != cu_header->addr_size)
8665 dwarf2_const_value_length_mismatch_complaint (SYMBOL_PRINT_NAME (sym),
8666 cu_header->addr_size,
8667 TYPE_LENGTH (SYMBOL_TYPE
8669 SYMBOL_VALUE_BYTES (sym) =
8670 obstack_alloc (&objfile->objfile_obstack, cu_header->addr_size);
8671 /* NOTE: cagney/2003-05-09: In-lined store_address call with
8672 it's body - store_unsigned_integer. */
8673 store_unsigned_integer (SYMBOL_VALUE_BYTES (sym), cu_header->addr_size,
8674 byte_order, DW_ADDR (attr));
8675 SYMBOL_CLASS (sym) = LOC_CONST_BYTES;
8677 case DW_FORM_string:
8679 /* DW_STRING is already allocated on the obstack, point directly
8681 SYMBOL_VALUE_BYTES (sym) = (gdb_byte *) DW_STRING (attr);
8682 SYMBOL_CLASS (sym) = LOC_CONST_BYTES;
8684 case DW_FORM_block1:
8685 case DW_FORM_block2:
8686 case DW_FORM_block4:
8688 blk = DW_BLOCK (attr);
8689 if (TYPE_LENGTH (SYMBOL_TYPE (sym)) != blk->size)
8690 dwarf2_const_value_length_mismatch_complaint (SYMBOL_PRINT_NAME (sym),
8692 TYPE_LENGTH (SYMBOL_TYPE
8694 SYMBOL_VALUE_BYTES (sym) =
8695 obstack_alloc (&objfile->objfile_obstack, blk->size);
8696 memcpy (SYMBOL_VALUE_BYTES (sym), blk->data, blk->size);
8697 SYMBOL_CLASS (sym) = LOC_CONST_BYTES;
8700 /* The DW_AT_const_value attributes are supposed to carry the
8701 symbol's value "represented as it would be on the target
8702 architecture." By the time we get here, it's already been
8703 converted to host endianness, so we just need to sign- or
8704 zero-extend it as appropriate. */
8706 dwarf2_const_value_data (attr, sym, 8);
8709 dwarf2_const_value_data (attr, sym, 16);
8712 dwarf2_const_value_data (attr, sym, 32);
8715 dwarf2_const_value_data (attr, sym, 64);
8719 SYMBOL_VALUE (sym) = DW_SND (attr);
8720 SYMBOL_CLASS (sym) = LOC_CONST;
8724 SYMBOL_VALUE (sym) = DW_UNSND (attr);
8725 SYMBOL_CLASS (sym) = LOC_CONST;
8729 complaint (&symfile_complaints,
8730 _("unsupported const value attribute form: '%s'"),
8731 dwarf_form_name (attr->form));
8732 SYMBOL_VALUE (sym) = 0;
8733 SYMBOL_CLASS (sym) = LOC_CONST;
8739 /* Given an attr with a DW_FORM_dataN value in host byte order, sign-
8740 or zero-extend it as appropriate for the symbol's type. */
8742 dwarf2_const_value_data (struct attribute *attr,
8746 LONGEST l = DW_UNSND (attr);
8748 if (bits < sizeof (l) * 8)
8750 if (TYPE_UNSIGNED (SYMBOL_TYPE (sym)))
8751 l &= ((LONGEST) 1 << bits) - 1;
8753 l = (l << (sizeof (l) * 8 - bits)) >> (sizeof (l) * 8 - bits);
8756 SYMBOL_VALUE (sym) = l;
8757 SYMBOL_CLASS (sym) = LOC_CONST;
8761 /* Return the type of the die in question using its DW_AT_type attribute. */
8763 static struct type *
8764 die_type (struct die_info *die, struct dwarf2_cu *cu)
8767 struct attribute *type_attr;
8768 struct die_info *type_die;
8770 type_attr = dwarf2_attr (die, DW_AT_type, cu);
8773 /* A missing DW_AT_type represents a void type. */
8774 return objfile_type (cu->objfile)->builtin_void;
8777 type_die = follow_die_ref_or_sig (die, type_attr, &cu);
8779 type = tag_type_to_type (type_die, cu);
8782 dump_die_for_error (type_die);
8783 error (_("Dwarf Error: Problem turning type die at offset into gdb type [in module %s]"),
8789 /* True iff CU's producer generates GNAT Ada auxiliary information
8790 that allows to find parallel types through that information instead
8791 of having to do expensive parallel lookups by type name. */
8794 need_gnat_info (struct dwarf2_cu *cu)
8796 /* FIXME: brobecker/2010-10-12: As of now, only the AdaCore version
8797 of GNAT produces this auxiliary information, without any indication
8798 that it is produced. Part of enhancing the FSF version of GNAT
8799 to produce that information will be to put in place an indicator
8800 that we can use in order to determine whether the descriptive type
8801 info is available or not. One suggestion that has been made is
8802 to use a new attribute, attached to the CU die. For now, assume
8803 that the descriptive type info is not available. */
8808 /* Return the auxiliary type of the die in question using its
8809 DW_AT_GNAT_descriptive_type attribute. Returns NULL if the
8810 attribute is not present. */
8812 static struct type *
8813 die_descriptive_type (struct die_info *die, struct dwarf2_cu *cu)
8816 struct attribute *type_attr;
8817 struct die_info *type_die;
8819 type_attr = dwarf2_attr (die, DW_AT_GNAT_descriptive_type, cu);
8823 type_die = follow_die_ref (die, type_attr, &cu);
8824 type = tag_type_to_type (type_die, cu);
8827 dump_die_for_error (type_die);
8828 error (_("Dwarf Error: Problem turning type die at offset into gdb type [in module %s]"),
8834 /* If DIE has a descriptive_type attribute, then set the TYPE's
8835 descriptive type accordingly. */
8838 set_descriptive_type (struct type *type, struct die_info *die,
8839 struct dwarf2_cu *cu)
8841 struct type *descriptive_type = die_descriptive_type (die, cu);
8843 if (descriptive_type)
8845 ALLOCATE_GNAT_AUX_TYPE (type);
8846 TYPE_DESCRIPTIVE_TYPE (type) = descriptive_type;
8850 /* Return the containing type of the die in question using its
8851 DW_AT_containing_type attribute. */
8853 static struct type *
8854 die_containing_type (struct die_info *die, struct dwarf2_cu *cu)
8856 struct type *type = NULL;
8857 struct attribute *type_attr;
8858 struct die_info *type_die = NULL;
8860 type_attr = dwarf2_attr (die, DW_AT_containing_type, cu);
8863 type_die = follow_die_ref_or_sig (die, type_attr, &cu);
8864 type = tag_type_to_type (type_die, cu);
8869 dump_die_for_error (type_die);
8870 error (_("Dwarf Error: Problem turning containing type into gdb type [in module %s]"),
8876 static struct type *
8877 tag_type_to_type (struct die_info *die, struct dwarf2_cu *cu)
8879 struct type *this_type;
8881 this_type = read_type_die (die, cu);
8884 dump_die_for_error (die);
8885 error (_("Dwarf Error: Cannot find type of die [in module %s]"),
8891 static struct type *
8892 read_type_die (struct die_info *die, struct dwarf2_cu *cu)
8894 struct type *this_type;
8896 this_type = get_die_type (die, cu);
8902 case DW_TAG_class_type:
8903 case DW_TAG_interface_type:
8904 case DW_TAG_structure_type:
8905 case DW_TAG_union_type:
8906 this_type = read_structure_type (die, cu);
8908 case DW_TAG_enumeration_type:
8909 this_type = read_enumeration_type (die, cu);
8911 case DW_TAG_subprogram:
8912 case DW_TAG_subroutine_type:
8913 case DW_TAG_inlined_subroutine:
8914 this_type = read_subroutine_type (die, cu);
8916 case DW_TAG_array_type:
8917 this_type = read_array_type (die, cu);
8919 case DW_TAG_set_type:
8920 this_type = read_set_type (die, cu);
8922 case DW_TAG_pointer_type:
8923 this_type = read_tag_pointer_type (die, cu);
8925 case DW_TAG_ptr_to_member_type:
8926 this_type = read_tag_ptr_to_member_type (die, cu);
8928 case DW_TAG_reference_type:
8929 this_type = read_tag_reference_type (die, cu);
8931 case DW_TAG_const_type:
8932 this_type = read_tag_const_type (die, cu);
8934 case DW_TAG_volatile_type:
8935 this_type = read_tag_volatile_type (die, cu);
8937 case DW_TAG_string_type:
8938 this_type = read_tag_string_type (die, cu);
8940 case DW_TAG_typedef:
8941 this_type = read_typedef (die, cu);
8943 case DW_TAG_subrange_type:
8944 this_type = read_subrange_type (die, cu);
8946 case DW_TAG_base_type:
8947 this_type = read_base_type (die, cu);
8949 case DW_TAG_unspecified_type:
8950 this_type = read_unspecified_type (die, cu);
8952 case DW_TAG_namespace:
8953 this_type = read_namespace_type (die, cu);
8956 complaint (&symfile_complaints, _("unexpected tag in read_type_die: '%s'"),
8957 dwarf_tag_name (die->tag));
8964 /* Return the name of the namespace/class that DIE is defined within,
8965 or "" if we can't tell. The caller should not xfree the result.
8967 For example, if we're within the method foo() in the following
8977 then determine_prefix on foo's die will return "N::C". */
8980 determine_prefix (struct die_info *die, struct dwarf2_cu *cu)
8982 struct die_info *parent, *spec_die;
8983 struct dwarf2_cu *spec_cu;
8984 struct type *parent_type;
8986 if (cu->language != language_cplus
8987 && cu->language != language_java)
8990 /* We have to be careful in the presence of DW_AT_specification.
8991 For example, with GCC 3.4, given the code
8995 // Definition of N::foo.
8999 then we'll have a tree of DIEs like this:
9001 1: DW_TAG_compile_unit
9002 2: DW_TAG_namespace // N
9003 3: DW_TAG_subprogram // declaration of N::foo
9004 4: DW_TAG_subprogram // definition of N::foo
9005 DW_AT_specification // refers to die #3
9007 Thus, when processing die #4, we have to pretend that we're in
9008 the context of its DW_AT_specification, namely the contex of die
9011 spec_die = die_specification (die, &spec_cu);
9012 if (spec_die == NULL)
9013 parent = die->parent;
9016 parent = spec_die->parent;
9023 switch (parent->tag)
9025 case DW_TAG_namespace:
9026 parent_type = read_type_die (parent, cu);
9027 /* We give a name to even anonymous namespaces. */
9028 return TYPE_TAG_NAME (parent_type);
9029 case DW_TAG_class_type:
9030 case DW_TAG_interface_type:
9031 case DW_TAG_structure_type:
9032 case DW_TAG_union_type:
9033 parent_type = read_type_die (parent, cu);
9034 if (TYPE_TAG_NAME (parent_type) != NULL)
9035 return TYPE_TAG_NAME (parent_type);
9037 /* An anonymous structure is only allowed non-static data
9038 members; no typedefs, no member functions, et cetera.
9039 So it does not need a prefix. */
9042 return determine_prefix (parent, cu);
9046 /* Return a newly-allocated string formed by concatenating PREFIX and
9047 SUFFIX with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then
9048 simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null,
9049 perform an obconcat, otherwise allocate storage for the result. The CU argument
9050 is used to determine the language and hence, the appropriate separator. */
9052 #define MAX_SEP_LEN 2 /* sizeof ("::") */
9055 typename_concat (struct obstack *obs, const char *prefix, const char *suffix,
9056 struct dwarf2_cu *cu)
9060 if (suffix == NULL || suffix[0] == '\0' || prefix == NULL || prefix[0] == '\0')
9062 else if (cu->language == language_java)
9074 char *retval = xmalloc (strlen (prefix) + MAX_SEP_LEN + strlen (suffix) + 1);
9075 strcpy (retval, prefix);
9076 strcat (retval, sep);
9077 strcat (retval, suffix);
9082 /* We have an obstack. */
9083 return obconcat (obs, prefix, sep, suffix);
9087 /* Return sibling of die, NULL if no sibling. */
9089 static struct die_info *
9090 sibling_die (struct die_info *die)
9092 return die->sibling;
9095 /* Get linkage name of a die, return NULL if not found. */
9098 dwarf2_linkage_name (struct die_info *die, struct dwarf2_cu *cu)
9100 struct attribute *attr;
9102 attr = dwarf2_attr (die, DW_AT_MIPS_linkage_name, cu);
9103 if (attr && DW_STRING (attr))
9104 return DW_STRING (attr);
9105 return dwarf2_name (die, cu);
9108 /* Get name of a die, return NULL if not found. */
9111 dwarf2_canonicalize_name (char *name, struct dwarf2_cu *cu,
9112 struct obstack *obstack)
9114 if (name && cu->language == language_cplus)
9116 char *canon_name = cp_canonicalize_string (name);
9118 if (canon_name != NULL)
9120 if (strcmp (canon_name, name) != 0)
9121 name = obsavestring (canon_name, strlen (canon_name),
9130 /* Get name of a die, return NULL if not found. */
9133 dwarf2_name (struct die_info *die, struct dwarf2_cu *cu)
9135 struct attribute *attr;
9137 attr = dwarf2_attr (die, DW_AT_name, cu);
9138 if (!attr || !DW_STRING (attr))
9143 case DW_TAG_compile_unit:
9144 /* Compilation units have a DW_AT_name that is a filename, not
9145 a source language identifier. */
9146 case DW_TAG_enumeration_type:
9147 case DW_TAG_enumerator:
9148 /* These tags always have simple identifiers already; no need
9149 to canonicalize them. */
9150 return DW_STRING (attr);
9152 if (!DW_STRING_IS_CANONICAL (attr))
9155 = dwarf2_canonicalize_name (DW_STRING (attr), cu,
9156 &cu->objfile->objfile_obstack);
9157 DW_STRING_IS_CANONICAL (attr) = 1;
9159 return DW_STRING (attr);
9163 /* Return the die that this die in an extension of, or NULL if there
9164 is none. *EXT_CU is the CU containing DIE on input, and the CU
9165 containing the return value on output. */
9167 static struct die_info *
9168 dwarf2_extension (struct die_info *die, struct dwarf2_cu **ext_cu)
9170 struct attribute *attr;
9172 attr = dwarf2_attr (die, DW_AT_extension, *ext_cu);
9176 return follow_die_ref (die, attr, ext_cu);
9179 /* Convert a DIE tag into its string name. */
9182 dwarf_tag_name (unsigned tag)
9186 case DW_TAG_padding:
9187 return "DW_TAG_padding";
9188 case DW_TAG_array_type:
9189 return "DW_TAG_array_type";
9190 case DW_TAG_class_type:
9191 return "DW_TAG_class_type";
9192 case DW_TAG_entry_point:
9193 return "DW_TAG_entry_point";
9194 case DW_TAG_enumeration_type:
9195 return "DW_TAG_enumeration_type";
9196 case DW_TAG_formal_parameter:
9197 return "DW_TAG_formal_parameter";
9198 case DW_TAG_imported_declaration:
9199 return "DW_TAG_imported_declaration";
9201 return "DW_TAG_label";
9202 case DW_TAG_lexical_block:
9203 return "DW_TAG_lexical_block";
9205 return "DW_TAG_member";
9206 case DW_TAG_pointer_type:
9207 return "DW_TAG_pointer_type";
9208 case DW_TAG_reference_type:
9209 return "DW_TAG_reference_type";
9210 case DW_TAG_compile_unit:
9211 return "DW_TAG_compile_unit";
9212 case DW_TAG_string_type:
9213 return "DW_TAG_string_type";
9214 case DW_TAG_structure_type:
9215 return "DW_TAG_structure_type";
9216 case DW_TAG_subroutine_type:
9217 return "DW_TAG_subroutine_type";
9218 case DW_TAG_typedef:
9219 return "DW_TAG_typedef";
9220 case DW_TAG_union_type:
9221 return "DW_TAG_union_type";
9222 case DW_TAG_unspecified_parameters:
9223 return "DW_TAG_unspecified_parameters";
9224 case DW_TAG_variant:
9225 return "DW_TAG_variant";
9226 case DW_TAG_common_block:
9227 return "DW_TAG_common_block";
9228 case DW_TAG_common_inclusion:
9229 return "DW_TAG_common_inclusion";
9230 case DW_TAG_inheritance:
9231 return "DW_TAG_inheritance";
9232 case DW_TAG_inlined_subroutine:
9233 return "DW_TAG_inlined_subroutine";
9235 return "DW_TAG_module";
9236 case DW_TAG_ptr_to_member_type:
9237 return "DW_TAG_ptr_to_member_type";
9238 case DW_TAG_set_type:
9239 return "DW_TAG_set_type";
9240 case DW_TAG_subrange_type:
9241 return "DW_TAG_subrange_type";
9242 case DW_TAG_with_stmt:
9243 return "DW_TAG_with_stmt";
9244 case DW_TAG_access_declaration:
9245 return "DW_TAG_access_declaration";
9246 case DW_TAG_base_type:
9247 return "DW_TAG_base_type";
9248 case DW_TAG_catch_block:
9249 return "DW_TAG_catch_block";
9250 case DW_TAG_const_type:
9251 return "DW_TAG_const_type";
9252 case DW_TAG_constant:
9253 return "DW_TAG_constant";
9254 case DW_TAG_enumerator:
9255 return "DW_TAG_enumerator";
9256 case DW_TAG_file_type:
9257 return "DW_TAG_file_type";
9259 return "DW_TAG_friend";
9260 case DW_TAG_namelist:
9261 return "DW_TAG_namelist";
9262 case DW_TAG_namelist_item:
9263 return "DW_TAG_namelist_item";
9264 case DW_TAG_packed_type:
9265 return "DW_TAG_packed_type";
9266 case DW_TAG_subprogram:
9267 return "DW_TAG_subprogram";
9268 case DW_TAG_template_type_param:
9269 return "DW_TAG_template_type_param";
9270 case DW_TAG_template_value_param:
9271 return "DW_TAG_template_value_param";
9272 case DW_TAG_thrown_type:
9273 return "DW_TAG_thrown_type";
9274 case DW_TAG_try_block:
9275 return "DW_TAG_try_block";
9276 case DW_TAG_variant_part:
9277 return "DW_TAG_variant_part";
9278 case DW_TAG_variable:
9279 return "DW_TAG_variable";
9280 case DW_TAG_volatile_type:
9281 return "DW_TAG_volatile_type";
9282 case DW_TAG_dwarf_procedure:
9283 return "DW_TAG_dwarf_procedure";
9284 case DW_TAG_restrict_type:
9285 return "DW_TAG_restrict_type";
9286 case DW_TAG_interface_type:
9287 return "DW_TAG_interface_type";
9288 case DW_TAG_namespace:
9289 return "DW_TAG_namespace";
9290 case DW_TAG_imported_module:
9291 return "DW_TAG_imported_module";
9292 case DW_TAG_unspecified_type:
9293 return "DW_TAG_unspecified_type";
9294 case DW_TAG_partial_unit:
9295 return "DW_TAG_partial_unit";
9296 case DW_TAG_imported_unit:
9297 return "DW_TAG_imported_unit";
9298 case DW_TAG_condition:
9299 return "DW_TAG_condition";
9300 case DW_TAG_shared_type:
9301 return "DW_TAG_shared_type";
9302 case DW_TAG_type_unit:
9303 return "DW_TAG_type_unit";
9304 case DW_TAG_MIPS_loop:
9305 return "DW_TAG_MIPS_loop";
9306 case DW_TAG_HP_array_descriptor:
9307 return "DW_TAG_HP_array_descriptor";
9308 case DW_TAG_format_label:
9309 return "DW_TAG_format_label";
9310 case DW_TAG_function_template:
9311 return "DW_TAG_function_template";
9312 case DW_TAG_class_template:
9313 return "DW_TAG_class_template";
9314 case DW_TAG_GNU_BINCL:
9315 return "DW_TAG_GNU_BINCL";
9316 case DW_TAG_GNU_EINCL:
9317 return "DW_TAG_GNU_EINCL";
9318 case DW_TAG_upc_shared_type:
9319 return "DW_TAG_upc_shared_type";
9320 case DW_TAG_upc_strict_type:
9321 return "DW_TAG_upc_strict_type";
9322 case DW_TAG_upc_relaxed_type:
9323 return "DW_TAG_upc_relaxed_type";
9324 case DW_TAG_PGI_kanji_type:
9325 return "DW_TAG_PGI_kanji_type";
9326 case DW_TAG_PGI_interface_block:
9327 return "DW_TAG_PGI_interface_block";
9329 return "DW_TAG_<unknown>";
9333 /* Convert a DWARF attribute code into its string name. */
9336 dwarf_attr_name (unsigned attr)
9341 return "DW_AT_sibling";
9342 case DW_AT_location:
9343 return "DW_AT_location";
9345 return "DW_AT_name";
9346 case DW_AT_ordering:
9347 return "DW_AT_ordering";
9348 case DW_AT_subscr_data:
9349 return "DW_AT_subscr_data";
9350 case DW_AT_byte_size:
9351 return "DW_AT_byte_size";
9352 case DW_AT_bit_offset:
9353 return "DW_AT_bit_offset";
9354 case DW_AT_bit_size:
9355 return "DW_AT_bit_size";
9356 case DW_AT_element_list:
9357 return "DW_AT_element_list";
9358 case DW_AT_stmt_list:
9359 return "DW_AT_stmt_list";
9361 return "DW_AT_low_pc";
9363 return "DW_AT_high_pc";
9364 case DW_AT_language:
9365 return "DW_AT_language";
9367 return "DW_AT_member";
9369 return "DW_AT_discr";
9370 case DW_AT_discr_value:
9371 return "DW_AT_discr_value";
9372 case DW_AT_visibility:
9373 return "DW_AT_visibility";
9375 return "DW_AT_import";
9376 case DW_AT_string_length:
9377 return "DW_AT_string_length";
9378 case DW_AT_common_reference:
9379 return "DW_AT_common_reference";
9380 case DW_AT_comp_dir:
9381 return "DW_AT_comp_dir";
9382 case DW_AT_const_value:
9383 return "DW_AT_const_value";
9384 case DW_AT_containing_type:
9385 return "DW_AT_containing_type";
9386 case DW_AT_default_value:
9387 return "DW_AT_default_value";
9389 return "DW_AT_inline";
9390 case DW_AT_is_optional:
9391 return "DW_AT_is_optional";
9392 case DW_AT_lower_bound:
9393 return "DW_AT_lower_bound";
9394 case DW_AT_producer:
9395 return "DW_AT_producer";
9396 case DW_AT_prototyped:
9397 return "DW_AT_prototyped";
9398 case DW_AT_return_addr:
9399 return "DW_AT_return_addr";
9400 case DW_AT_start_scope:
9401 return "DW_AT_start_scope";
9402 case DW_AT_bit_stride:
9403 return "DW_AT_bit_stride";
9404 case DW_AT_upper_bound:
9405 return "DW_AT_upper_bound";
9406 case DW_AT_abstract_origin:
9407 return "DW_AT_abstract_origin";
9408 case DW_AT_accessibility:
9409 return "DW_AT_accessibility";
9410 case DW_AT_address_class:
9411 return "DW_AT_address_class";
9412 case DW_AT_artificial:
9413 return "DW_AT_artificial";
9414 case DW_AT_base_types:
9415 return "DW_AT_base_types";
9416 case DW_AT_calling_convention:
9417 return "DW_AT_calling_convention";
9419 return "DW_AT_count";
9420 case DW_AT_data_member_location:
9421 return "DW_AT_data_member_location";
9422 case DW_AT_decl_column:
9423 return "DW_AT_decl_column";
9424 case DW_AT_decl_file:
9425 return "DW_AT_decl_file";
9426 case DW_AT_decl_line:
9427 return "DW_AT_decl_line";
9428 case DW_AT_declaration:
9429 return "DW_AT_declaration";
9430 case DW_AT_discr_list:
9431 return "DW_AT_discr_list";
9432 case DW_AT_encoding:
9433 return "DW_AT_encoding";
9434 case DW_AT_external:
9435 return "DW_AT_external";
9436 case DW_AT_frame_base:
9437 return "DW_AT_frame_base";
9439 return "DW_AT_friend";
9440 case DW_AT_identifier_case:
9441 return "DW_AT_identifier_case";
9442 case DW_AT_macro_info:
9443 return "DW_AT_macro_info";
9444 case DW_AT_namelist_items:
9445 return "DW_AT_namelist_items";
9446 case DW_AT_priority:
9447 return "DW_AT_priority";
9449 return "DW_AT_segment";
9450 case DW_AT_specification:
9451 return "DW_AT_specification";
9452 case DW_AT_static_link:
9453 return "DW_AT_static_link";
9455 return "DW_AT_type";
9456 case DW_AT_use_location:
9457 return "DW_AT_use_location";
9458 case DW_AT_variable_parameter:
9459 return "DW_AT_variable_parameter";
9460 case DW_AT_virtuality:
9461 return "DW_AT_virtuality";
9462 case DW_AT_vtable_elem_location:
9463 return "DW_AT_vtable_elem_location";
9464 /* DWARF 3 values. */
9465 case DW_AT_allocated:
9466 return "DW_AT_allocated";
9467 case DW_AT_associated:
9468 return "DW_AT_associated";
9469 case DW_AT_data_location:
9470 return "DW_AT_data_location";
9471 case DW_AT_byte_stride:
9472 return "DW_AT_byte_stride";
9473 case DW_AT_entry_pc:
9474 return "DW_AT_entry_pc";
9475 case DW_AT_use_UTF8:
9476 return "DW_AT_use_UTF8";
9477 case DW_AT_extension:
9478 return "DW_AT_extension";
9480 return "DW_AT_ranges";
9481 case DW_AT_trampoline:
9482 return "DW_AT_trampoline";
9483 case DW_AT_call_column:
9484 return "DW_AT_call_column";
9485 case DW_AT_call_file:
9486 return "DW_AT_call_file";
9487 case DW_AT_call_line:
9488 return "DW_AT_call_line";
9489 case DW_AT_description:
9490 return "DW_AT_description";
9491 case DW_AT_binary_scale:
9492 return "DW_AT_binary_scale";
9493 case DW_AT_decimal_scale:
9494 return "DW_AT_decimal_scale";
9496 return "DW_AT_small";
9497 case DW_AT_decimal_sign:
9498 return "DW_AT_decimal_sign";
9499 case DW_AT_digit_count:
9500 return "DW_AT_digit_count";
9501 case DW_AT_picture_string:
9502 return "DW_AT_picture_string";
9504 return "DW_AT_mutable";
9505 case DW_AT_threads_scaled:
9506 return "DW_AT_threads_scaled";
9507 case DW_AT_explicit:
9508 return "DW_AT_explicit";
9509 case DW_AT_object_pointer:
9510 return "DW_AT_object_pointer";
9511 case DW_AT_endianity:
9512 return "DW_AT_endianity";
9513 case DW_AT_elemental:
9514 return "DW_AT_elemental";
9516 return "DW_AT_pure";
9517 case DW_AT_recursive:
9518 return "DW_AT_recursive";
9519 /* DWARF 4 values. */
9520 case DW_AT_signature:
9521 return "DW_AT_signature";
9522 /* SGI/MIPS extensions. */
9523 #ifdef MIPS /* collides with DW_AT_HP_block_index */
9524 case DW_AT_MIPS_fde:
9525 return "DW_AT_MIPS_fde";
9527 case DW_AT_MIPS_loop_begin:
9528 return "DW_AT_MIPS_loop_begin";
9529 case DW_AT_MIPS_tail_loop_begin:
9530 return "DW_AT_MIPS_tail_loop_begin";
9531 case DW_AT_MIPS_epilog_begin:
9532 return "DW_AT_MIPS_epilog_begin";
9533 case DW_AT_MIPS_loop_unroll_factor:
9534 return "DW_AT_MIPS_loop_unroll_factor";
9535 case DW_AT_MIPS_software_pipeline_depth:
9536 return "DW_AT_MIPS_software_pipeline_depth";
9537 case DW_AT_MIPS_linkage_name:
9538 return "DW_AT_MIPS_linkage_name";
9539 case DW_AT_MIPS_stride:
9540 return "DW_AT_MIPS_stride";
9541 case DW_AT_MIPS_abstract_name:
9542 return "DW_AT_MIPS_abstract_name";
9543 case DW_AT_MIPS_clone_origin:
9544 return "DW_AT_MIPS_clone_origin";
9545 case DW_AT_MIPS_has_inlines:
9546 return "DW_AT_MIPS_has_inlines";
9547 /* HP extensions. */
9548 #ifndef MIPS /* collides with DW_AT_MIPS_fde */
9549 case DW_AT_HP_block_index:
9550 return "DW_AT_HP_block_index";
9552 case DW_AT_HP_unmodifiable:
9553 return "DW_AT_HP_unmodifiable";
9554 case DW_AT_HP_actuals_stmt_list:
9555 return "DW_AT_HP_actuals_stmt_list";
9556 case DW_AT_HP_proc_per_section:
9557 return "DW_AT_HP_proc_per_section";
9558 case DW_AT_HP_raw_data_ptr:
9559 return "DW_AT_HP_raw_data_ptr";
9560 case DW_AT_HP_pass_by_reference:
9561 return "DW_AT_HP_pass_by_reference";
9562 case DW_AT_HP_opt_level:
9563 return "DW_AT_HP_opt_level";
9564 case DW_AT_HP_prof_version_id:
9565 return "DW_AT_HP_prof_version_id";
9566 case DW_AT_HP_opt_flags:
9567 return "DW_AT_HP_opt_flags";
9568 case DW_AT_HP_cold_region_low_pc:
9569 return "DW_AT_HP_cold_region_low_pc";
9570 case DW_AT_HP_cold_region_high_pc:
9571 return "DW_AT_HP_cold_region_high_pc";
9572 case DW_AT_HP_all_variables_modifiable:
9573 return "DW_AT_HP_all_variables_modifiable";
9574 case DW_AT_HP_linkage_name:
9575 return "DW_AT_HP_linkage_name";
9576 case DW_AT_HP_prof_flags:
9577 return "DW_AT_HP_prof_flags";
9578 /* GNU extensions. */
9579 case DW_AT_sf_names:
9580 return "DW_AT_sf_names";
9581 case DW_AT_src_info:
9582 return "DW_AT_src_info";
9583 case DW_AT_mac_info:
9584 return "DW_AT_mac_info";
9585 case DW_AT_src_coords:
9586 return "DW_AT_src_coords";
9587 case DW_AT_body_begin:
9588 return "DW_AT_body_begin";
9589 case DW_AT_body_end:
9590 return "DW_AT_body_end";
9591 case DW_AT_GNU_vector:
9592 return "DW_AT_GNU_vector";
9593 /* VMS extensions. */
9594 case DW_AT_VMS_rtnbeg_pd_address:
9595 return "DW_AT_VMS_rtnbeg_pd_address";
9596 /* UPC extension. */
9597 case DW_AT_upc_threads_scaled:
9598 return "DW_AT_upc_threads_scaled";
9599 /* PGI (STMicroelectronics) extensions. */
9600 case DW_AT_PGI_lbase:
9601 return "DW_AT_PGI_lbase";
9602 case DW_AT_PGI_soffset:
9603 return "DW_AT_PGI_soffset";
9604 case DW_AT_PGI_lstride:
9605 return "DW_AT_PGI_lstride";
9607 return "DW_AT_<unknown>";
9611 /* Convert a DWARF value form code into its string name. */
9614 dwarf_form_name (unsigned form)
9619 return "DW_FORM_addr";
9620 case DW_FORM_block2:
9621 return "DW_FORM_block2";
9622 case DW_FORM_block4:
9623 return "DW_FORM_block4";
9625 return "DW_FORM_data2";
9627 return "DW_FORM_data4";
9629 return "DW_FORM_data8";
9630 case DW_FORM_string:
9631 return "DW_FORM_string";
9633 return "DW_FORM_block";
9634 case DW_FORM_block1:
9635 return "DW_FORM_block1";
9637 return "DW_FORM_data1";
9639 return "DW_FORM_flag";
9641 return "DW_FORM_sdata";
9643 return "DW_FORM_strp";
9645 return "DW_FORM_udata";
9646 case DW_FORM_ref_addr:
9647 return "DW_FORM_ref_addr";
9649 return "DW_FORM_ref1";
9651 return "DW_FORM_ref2";
9653 return "DW_FORM_ref4";
9655 return "DW_FORM_ref8";
9656 case DW_FORM_ref_udata:
9657 return "DW_FORM_ref_udata";
9658 case DW_FORM_indirect:
9659 return "DW_FORM_indirect";
9660 case DW_FORM_sec_offset:
9661 return "DW_FORM_sec_offset";
9662 case DW_FORM_exprloc:
9663 return "DW_FORM_exprloc";
9664 case DW_FORM_flag_present:
9665 return "DW_FORM_flag_present";
9667 return "DW_FORM_sig8";
9669 return "DW_FORM_<unknown>";
9673 /* Convert a DWARF stack opcode into its string name. */
9676 dwarf_stack_op_name (unsigned op)
9681 return "DW_OP_addr";
9683 return "DW_OP_deref";
9685 return "DW_OP_const1u";
9687 return "DW_OP_const1s";
9689 return "DW_OP_const2u";
9691 return "DW_OP_const2s";
9693 return "DW_OP_const4u";
9695 return "DW_OP_const4s";
9697 return "DW_OP_const8u";
9699 return "DW_OP_const8s";
9701 return "DW_OP_constu";
9703 return "DW_OP_consts";
9707 return "DW_OP_drop";
9709 return "DW_OP_over";
9711 return "DW_OP_pick";
9713 return "DW_OP_swap";
9717 return "DW_OP_xderef";
9725 return "DW_OP_minus";
9737 return "DW_OP_plus";
9738 case DW_OP_plus_uconst:
9739 return "DW_OP_plus_uconst";
9745 return "DW_OP_shra";
9763 return "DW_OP_skip";
9765 return "DW_OP_lit0";
9767 return "DW_OP_lit1";
9769 return "DW_OP_lit2";
9771 return "DW_OP_lit3";
9773 return "DW_OP_lit4";
9775 return "DW_OP_lit5";
9777 return "DW_OP_lit6";
9779 return "DW_OP_lit7";
9781 return "DW_OP_lit8";
9783 return "DW_OP_lit9";
9785 return "DW_OP_lit10";
9787 return "DW_OP_lit11";
9789 return "DW_OP_lit12";
9791 return "DW_OP_lit13";
9793 return "DW_OP_lit14";
9795 return "DW_OP_lit15";
9797 return "DW_OP_lit16";
9799 return "DW_OP_lit17";
9801 return "DW_OP_lit18";
9803 return "DW_OP_lit19";
9805 return "DW_OP_lit20";
9807 return "DW_OP_lit21";
9809 return "DW_OP_lit22";
9811 return "DW_OP_lit23";
9813 return "DW_OP_lit24";
9815 return "DW_OP_lit25";
9817 return "DW_OP_lit26";
9819 return "DW_OP_lit27";
9821 return "DW_OP_lit28";
9823 return "DW_OP_lit29";
9825 return "DW_OP_lit30";
9827 return "DW_OP_lit31";
9829 return "DW_OP_reg0";
9831 return "DW_OP_reg1";
9833 return "DW_OP_reg2";
9835 return "DW_OP_reg3";
9837 return "DW_OP_reg4";
9839 return "DW_OP_reg5";
9841 return "DW_OP_reg6";
9843 return "DW_OP_reg7";
9845 return "DW_OP_reg8";
9847 return "DW_OP_reg9";
9849 return "DW_OP_reg10";
9851 return "DW_OP_reg11";
9853 return "DW_OP_reg12";
9855 return "DW_OP_reg13";
9857 return "DW_OP_reg14";
9859 return "DW_OP_reg15";
9861 return "DW_OP_reg16";
9863 return "DW_OP_reg17";
9865 return "DW_OP_reg18";
9867 return "DW_OP_reg19";
9869 return "DW_OP_reg20";
9871 return "DW_OP_reg21";
9873 return "DW_OP_reg22";
9875 return "DW_OP_reg23";
9877 return "DW_OP_reg24";
9879 return "DW_OP_reg25";
9881 return "DW_OP_reg26";
9883 return "DW_OP_reg27";
9885 return "DW_OP_reg28";
9887 return "DW_OP_reg29";
9889 return "DW_OP_reg30";
9891 return "DW_OP_reg31";
9893 return "DW_OP_breg0";
9895 return "DW_OP_breg1";
9897 return "DW_OP_breg2";
9899 return "DW_OP_breg3";
9901 return "DW_OP_breg4";
9903 return "DW_OP_breg5";
9905 return "DW_OP_breg6";
9907 return "DW_OP_breg7";
9909 return "DW_OP_breg8";
9911 return "DW_OP_breg9";
9913 return "DW_OP_breg10";
9915 return "DW_OP_breg11";
9917 return "DW_OP_breg12";
9919 return "DW_OP_breg13";
9921 return "DW_OP_breg14";
9923 return "DW_OP_breg15";
9925 return "DW_OP_breg16";
9927 return "DW_OP_breg17";
9929 return "DW_OP_breg18";
9931 return "DW_OP_breg19";
9933 return "DW_OP_breg20";
9935 return "DW_OP_breg21";
9937 return "DW_OP_breg22";
9939 return "DW_OP_breg23";
9941 return "DW_OP_breg24";
9943 return "DW_OP_breg25";
9945 return "DW_OP_breg26";
9947 return "DW_OP_breg27";
9949 return "DW_OP_breg28";
9951 return "DW_OP_breg29";
9953 return "DW_OP_breg30";
9955 return "DW_OP_breg31";
9957 return "DW_OP_regx";
9959 return "DW_OP_fbreg";
9961 return "DW_OP_bregx";
9963 return "DW_OP_piece";
9964 case DW_OP_deref_size:
9965 return "DW_OP_deref_size";
9966 case DW_OP_xderef_size:
9967 return "DW_OP_xderef_size";
9970 /* DWARF 3 extensions. */
9971 case DW_OP_push_object_address:
9972 return "DW_OP_push_object_address";
9974 return "DW_OP_call2";
9976 return "DW_OP_call4";
9977 case DW_OP_call_ref:
9978 return "DW_OP_call_ref";
9979 /* GNU extensions. */
9980 case DW_OP_form_tls_address:
9981 return "DW_OP_form_tls_address";
9982 case DW_OP_call_frame_cfa:
9983 return "DW_OP_call_frame_cfa";
9984 case DW_OP_bit_piece:
9985 return "DW_OP_bit_piece";
9986 case DW_OP_GNU_push_tls_address:
9987 return "DW_OP_GNU_push_tls_address";
9988 case DW_OP_GNU_uninit:
9989 return "DW_OP_GNU_uninit";
9990 /* HP extensions. */
9991 case DW_OP_HP_is_value:
9992 return "DW_OP_HP_is_value";
9993 case DW_OP_HP_fltconst4:
9994 return "DW_OP_HP_fltconst4";
9995 case DW_OP_HP_fltconst8:
9996 return "DW_OP_HP_fltconst8";
9997 case DW_OP_HP_mod_range:
9998 return "DW_OP_HP_mod_range";
9999 case DW_OP_HP_unmod_range:
10000 return "DW_OP_HP_unmod_range";
10002 return "DW_OP_HP_tls";
10004 return "OP_<unknown>";
10009 dwarf_bool_name (unsigned mybool)
10017 /* Convert a DWARF type code into its string name. */
10020 dwarf_type_encoding_name (unsigned enc)
10025 return "DW_ATE_void";
10026 case DW_ATE_address:
10027 return "DW_ATE_address";
10028 case DW_ATE_boolean:
10029 return "DW_ATE_boolean";
10030 case DW_ATE_complex_float:
10031 return "DW_ATE_complex_float";
10033 return "DW_ATE_float";
10034 case DW_ATE_signed:
10035 return "DW_ATE_signed";
10036 case DW_ATE_signed_char:
10037 return "DW_ATE_signed_char";
10038 case DW_ATE_unsigned:
10039 return "DW_ATE_unsigned";
10040 case DW_ATE_unsigned_char:
10041 return "DW_ATE_unsigned_char";
10043 case DW_ATE_imaginary_float:
10044 return "DW_ATE_imaginary_float";
10045 case DW_ATE_packed_decimal:
10046 return "DW_ATE_packed_decimal";
10047 case DW_ATE_numeric_string:
10048 return "DW_ATE_numeric_string";
10049 case DW_ATE_edited:
10050 return "DW_ATE_edited";
10051 case DW_ATE_signed_fixed:
10052 return "DW_ATE_signed_fixed";
10053 case DW_ATE_unsigned_fixed:
10054 return "DW_ATE_unsigned_fixed";
10055 case DW_ATE_decimal_float:
10056 return "DW_ATE_decimal_float";
10057 /* HP extensions. */
10058 case DW_ATE_HP_float80:
10059 return "DW_ATE_HP_float80";
10060 case DW_ATE_HP_complex_float80:
10061 return "DW_ATE_HP_complex_float80";
10062 case DW_ATE_HP_float128:
10063 return "DW_ATE_HP_float128";
10064 case DW_ATE_HP_complex_float128:
10065 return "DW_ATE_HP_complex_float128";
10066 case DW_ATE_HP_floathpintel:
10067 return "DW_ATE_HP_floathpintel";
10068 case DW_ATE_HP_imaginary_float80:
10069 return "DW_ATE_HP_imaginary_float80";
10070 case DW_ATE_HP_imaginary_float128:
10071 return "DW_ATE_HP_imaginary_float128";
10073 return "DW_ATE_<unknown>";
10077 /* Convert a DWARF call frame info operation to its string name. */
10081 dwarf_cfi_name (unsigned cfi_opc)
10085 case DW_CFA_advance_loc:
10086 return "DW_CFA_advance_loc";
10087 case DW_CFA_offset:
10088 return "DW_CFA_offset";
10089 case DW_CFA_restore:
10090 return "DW_CFA_restore";
10092 return "DW_CFA_nop";
10093 case DW_CFA_set_loc:
10094 return "DW_CFA_set_loc";
10095 case DW_CFA_advance_loc1:
10096 return "DW_CFA_advance_loc1";
10097 case DW_CFA_advance_loc2:
10098 return "DW_CFA_advance_loc2";
10099 case DW_CFA_advance_loc4:
10100 return "DW_CFA_advance_loc4";
10101 case DW_CFA_offset_extended:
10102 return "DW_CFA_offset_extended";
10103 case DW_CFA_restore_extended:
10104 return "DW_CFA_restore_extended";
10105 case DW_CFA_undefined:
10106 return "DW_CFA_undefined";
10107 case DW_CFA_same_value:
10108 return "DW_CFA_same_value";
10109 case DW_CFA_register:
10110 return "DW_CFA_register";
10111 case DW_CFA_remember_state:
10112 return "DW_CFA_remember_state";
10113 case DW_CFA_restore_state:
10114 return "DW_CFA_restore_state";
10115 case DW_CFA_def_cfa:
10116 return "DW_CFA_def_cfa";
10117 case DW_CFA_def_cfa_register:
10118 return "DW_CFA_def_cfa_register";
10119 case DW_CFA_def_cfa_offset:
10120 return "DW_CFA_def_cfa_offset";
10122 case DW_CFA_def_cfa_expression:
10123 return "DW_CFA_def_cfa_expression";
10124 case DW_CFA_expression:
10125 return "DW_CFA_expression";
10126 case DW_CFA_offset_extended_sf:
10127 return "DW_CFA_offset_extended_sf";
10128 case DW_CFA_def_cfa_sf:
10129 return "DW_CFA_def_cfa_sf";
10130 case DW_CFA_def_cfa_offset_sf:
10131 return "DW_CFA_def_cfa_offset_sf";
10132 case DW_CFA_val_offset:
10133 return "DW_CFA_val_offset";
10134 case DW_CFA_val_offset_sf:
10135 return "DW_CFA_val_offset_sf";
10136 case DW_CFA_val_expression:
10137 return "DW_CFA_val_expression";
10138 /* SGI/MIPS specific. */
10139 case DW_CFA_MIPS_advance_loc8:
10140 return "DW_CFA_MIPS_advance_loc8";
10141 /* GNU extensions. */
10142 case DW_CFA_GNU_window_save:
10143 return "DW_CFA_GNU_window_save";
10144 case DW_CFA_GNU_args_size:
10145 return "DW_CFA_GNU_args_size";
10146 case DW_CFA_GNU_negative_offset_extended:
10147 return "DW_CFA_GNU_negative_offset_extended";
10149 return "DW_CFA_<unknown>";
10155 dump_die_shallow (struct ui_file *f, int indent, struct die_info *die)
10159 print_spaces (indent, f);
10160 fprintf_unfiltered (f, "Die: %s (abbrev %d, offset 0x%x)\n",
10161 dwarf_tag_name (die->tag), die->abbrev, die->offset);
10163 if (die->parent != NULL)
10165 print_spaces (indent, f);
10166 fprintf_unfiltered (f, " parent at offset: 0x%x\n",
10167 die->parent->offset);
10170 print_spaces (indent, f);
10171 fprintf_unfiltered (f, " has children: %s\n",
10172 dwarf_bool_name (die->child != NULL));
10174 print_spaces (indent, f);
10175 fprintf_unfiltered (f, " attributes:\n");
10177 for (i = 0; i < die->num_attrs; ++i)
10179 print_spaces (indent, f);
10180 fprintf_unfiltered (f, " %s (%s) ",
10181 dwarf_attr_name (die->attrs[i].name),
10182 dwarf_form_name (die->attrs[i].form));
10184 switch (die->attrs[i].form)
10186 case DW_FORM_ref_addr:
10188 fprintf_unfiltered (f, "address: ");
10189 fputs_filtered (hex_string (DW_ADDR (&die->attrs[i])), f);
10191 case DW_FORM_block2:
10192 case DW_FORM_block4:
10193 case DW_FORM_block:
10194 case DW_FORM_block1:
10195 fprintf_unfiltered (f, "block: size %d", DW_BLOCK (&die->attrs[i])->size);
10200 fprintf_unfiltered (f, "constant ref: 0x%lx (adjusted)",
10201 (long) (DW_ADDR (&die->attrs[i])));
10203 case DW_FORM_data1:
10204 case DW_FORM_data2:
10205 case DW_FORM_data4:
10206 case DW_FORM_data8:
10207 case DW_FORM_udata:
10208 case DW_FORM_sdata:
10209 fprintf_unfiltered (f, "constant: %s",
10210 pulongest (DW_UNSND (&die->attrs[i])));
10213 if (DW_SIGNATURED_TYPE (&die->attrs[i]) != NULL)
10214 fprintf_unfiltered (f, "signatured type, offset: 0x%x",
10215 DW_SIGNATURED_TYPE (&die->attrs[i])->offset);
10217 fprintf_unfiltered (f, "signatured type, offset: unknown");
10219 case DW_FORM_string:
10221 fprintf_unfiltered (f, "string: \"%s\" (%s canonicalized)",
10222 DW_STRING (&die->attrs[i])
10223 ? DW_STRING (&die->attrs[i]) : "",
10224 DW_STRING_IS_CANONICAL (&die->attrs[i]) ? "is" : "not");
10227 if (DW_UNSND (&die->attrs[i]))
10228 fprintf_unfiltered (f, "flag: TRUE");
10230 fprintf_unfiltered (f, "flag: FALSE");
10232 case DW_FORM_indirect:
10233 /* the reader will have reduced the indirect form to
10234 the "base form" so this form should not occur */
10235 fprintf_unfiltered (f, "unexpected attribute form: DW_FORM_indirect");
10238 fprintf_unfiltered (f, "unsupported attribute form: %d.",
10239 die->attrs[i].form);
10242 fprintf_unfiltered (f, "\n");
10247 dump_die_for_error (struct die_info *die)
10249 dump_die_shallow (gdb_stderr, 0, die);
10253 dump_die_1 (struct ui_file *f, int level, int max_level, struct die_info *die)
10255 int indent = level * 4;
10257 gdb_assert (die != NULL);
10259 if (level >= max_level)
10262 dump_die_shallow (f, indent, die);
10264 if (die->child != NULL)
10266 print_spaces (indent, f);
10267 fprintf_unfiltered (f, " Children:");
10268 if (level + 1 < max_level)
10270 fprintf_unfiltered (f, "\n");
10271 dump_die_1 (f, level + 1, max_level, die->child);
10275 fprintf_unfiltered (f, " [not printed, max nesting level reached]\n");
10279 if (die->sibling != NULL && level > 0)
10281 dump_die_1 (f, level, max_level, die->sibling);
10285 /* This is called from the pdie macro in gdbinit.in.
10286 It's not static so gcc will keep a copy callable from gdb. */
10289 dump_die (struct die_info *die, int max_level)
10291 dump_die_1 (gdb_stdlog, 0, max_level, die);
10295 store_in_ref_table (struct die_info *die, struct dwarf2_cu *cu)
10299 slot = htab_find_slot_with_hash (cu->die_hash, die, die->offset, INSERT);
10305 is_ref_attr (struct attribute *attr)
10307 switch (attr->form)
10309 case DW_FORM_ref_addr:
10314 case DW_FORM_ref_udata:
10321 static unsigned int
10322 dwarf2_get_ref_die_offset (struct attribute *attr)
10324 if (is_ref_attr (attr))
10325 return DW_ADDR (attr);
10327 complaint (&symfile_complaints,
10328 _("unsupported die ref attribute form: '%s'"),
10329 dwarf_form_name (attr->form));
10333 /* Return the constant value held by ATTR. Return DEFAULT_VALUE if
10334 * the value held by the attribute is not constant. */
10337 dwarf2_get_attr_constant_value (struct attribute *attr, int default_value)
10339 if (attr->form == DW_FORM_sdata)
10340 return DW_SND (attr);
10341 else if (attr->form == DW_FORM_udata
10342 || attr->form == DW_FORM_data1
10343 || attr->form == DW_FORM_data2
10344 || attr->form == DW_FORM_data4
10345 || attr->form == DW_FORM_data8)
10346 return DW_UNSND (attr);
10349 complaint (&symfile_complaints, _("Attribute value is not a constant (%s)"),
10350 dwarf_form_name (attr->form));
10351 return default_value;
10355 /* THIS_CU has a reference to PER_CU. If necessary, load the new compilation
10356 unit and add it to our queue.
10357 The result is non-zero if PER_CU was queued, otherwise the result is zero
10358 meaning either PER_CU is already queued or it is already loaded. */
10361 maybe_queue_comp_unit (struct dwarf2_cu *this_cu,
10362 struct dwarf2_per_cu_data *per_cu)
10364 /* Mark the dependence relation so that we don't flush PER_CU
10366 dwarf2_add_dependence (this_cu, per_cu);
10368 /* If it's already on the queue, we have nothing to do. */
10369 if (per_cu->queued)
10372 /* If the compilation unit is already loaded, just mark it as
10374 if (per_cu->cu != NULL)
10376 per_cu->cu->last_used = 0;
10380 /* Add it to the queue. */
10381 queue_comp_unit (per_cu, this_cu->objfile);
10386 /* Follow reference or signature attribute ATTR of SRC_DIE.
10387 On entry *REF_CU is the CU of SRC_DIE.
10388 On exit *REF_CU is the CU of the result. */
10390 static struct die_info *
10391 follow_die_ref_or_sig (struct die_info *src_die, struct attribute *attr,
10392 struct dwarf2_cu **ref_cu)
10394 struct die_info *die;
10396 if (is_ref_attr (attr))
10397 die = follow_die_ref (src_die, attr, ref_cu);
10398 else if (attr->form == DW_FORM_sig8)
10399 die = follow_die_sig (src_die, attr, ref_cu);
10402 dump_die_for_error (src_die);
10403 error (_("Dwarf Error: Expected reference attribute [in module %s]"),
10404 (*ref_cu)->objfile->name);
10410 /* Follow reference attribute ATTR of SRC_DIE.
10411 On entry *REF_CU is the CU of SRC_DIE.
10412 On exit *REF_CU is the CU of the result. */
10414 static struct die_info *
10415 follow_die_ref (struct die_info *src_die, struct attribute *attr,
10416 struct dwarf2_cu **ref_cu)
10418 struct die_info *die;
10419 unsigned int offset;
10420 struct die_info temp_die;
10421 struct dwarf2_cu *target_cu, *cu = *ref_cu;
10423 gdb_assert (cu->per_cu != NULL);
10425 offset = dwarf2_get_ref_die_offset (attr);
10427 if (cu->per_cu->from_debug_types)
10429 /* .debug_types CUs cannot reference anything outside their CU.
10430 If they need to, they have to reference a signatured type via
10432 if (! offset_in_cu_p (&cu->header, offset))
10436 else if (! offset_in_cu_p (&cu->header, offset))
10438 struct dwarf2_per_cu_data *per_cu;
10439 per_cu = dwarf2_find_containing_comp_unit (offset, cu->objfile);
10441 /* If necessary, add it to the queue and load its DIEs. */
10442 if (maybe_queue_comp_unit (cu, per_cu))
10443 load_full_comp_unit (per_cu, cu->objfile);
10445 target_cu = per_cu->cu;
10450 *ref_cu = target_cu;
10451 temp_die.offset = offset;
10452 die = htab_find_with_hash (target_cu->die_hash, &temp_die, offset);
10458 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced from DIE "
10459 "at 0x%x [in module %s]"),
10460 offset, src_die->offset, cu->objfile->name);
10463 /* Follow the signature attribute ATTR in SRC_DIE.
10464 On entry *REF_CU is the CU of SRC_DIE.
10465 On exit *REF_CU is the CU of the result. */
10467 static struct die_info *
10468 follow_die_sig (struct die_info *src_die, struct attribute *attr,
10469 struct dwarf2_cu **ref_cu)
10471 struct objfile *objfile = (*ref_cu)->objfile;
10472 struct die_info temp_die;
10473 struct signatured_type *sig_type = DW_SIGNATURED_TYPE (attr);
10474 struct dwarf2_cu *sig_cu;
10475 struct die_info *die;
10477 /* sig_type will be NULL if the signatured type is missing from
10479 if (sig_type == NULL)
10480 error (_("Dwarf Error: Cannot find signatured DIE referenced from DIE "
10481 "at 0x%x [in module %s]"),
10482 src_die->offset, objfile->name);
10484 /* If necessary, add it to the queue and load its DIEs. */
10486 if (maybe_queue_comp_unit (*ref_cu, &sig_type->per_cu))
10487 read_signatured_type (objfile, sig_type);
10489 gdb_assert (sig_type->per_cu.cu != NULL);
10491 sig_cu = sig_type->per_cu.cu;
10492 temp_die.offset = sig_cu->header.offset + sig_type->type_offset;
10493 die = htab_find_with_hash (sig_cu->die_hash, &temp_die, temp_die.offset);
10500 error (_("Dwarf Error: Cannot find signatured DIE at 0x%x referenced from DIE "
10501 "at 0x%x [in module %s]"),
10502 sig_type->type_offset, src_die->offset, objfile->name);
10505 /* Given an offset of a signatured type, return its signatured_type. */
10507 static struct signatured_type *
10508 lookup_signatured_type_at_offset (struct objfile *objfile, unsigned int offset)
10510 gdb_byte *info_ptr = dwarf2_per_objfile->types.buffer + offset;
10511 unsigned int length, initial_length_size;
10512 unsigned int sig_offset;
10513 struct signatured_type find_entry, *type_sig;
10515 length = read_initial_length (objfile->obfd, info_ptr, &initial_length_size);
10516 sig_offset = (initial_length_size
10518 + (initial_length_size == 4 ? 4 : 8) /*debug_abbrev_offset*/
10519 + 1 /*address_size*/);
10520 find_entry.signature = bfd_get_64 (objfile->obfd, info_ptr + sig_offset);
10521 type_sig = htab_find (dwarf2_per_objfile->signatured_types, &find_entry);
10523 /* This is only used to lookup previously recorded types.
10524 If we didn't find it, it's our bug. */
10525 gdb_assert (type_sig != NULL);
10526 gdb_assert (offset == type_sig->offset);
10531 /* Read in signatured type at OFFSET and build its CU and die(s). */
10534 read_signatured_type_at_offset (struct objfile *objfile,
10535 unsigned int offset)
10537 struct signatured_type *type_sig;
10539 /* We have the section offset, but we need the signature to do the
10540 hash table lookup. */
10541 type_sig = lookup_signatured_type_at_offset (objfile, offset);
10543 gdb_assert (type_sig->per_cu.cu == NULL);
10545 read_signatured_type (objfile, type_sig);
10547 gdb_assert (type_sig->per_cu.cu != NULL);
10550 /* Read in a signatured type and build its CU and DIEs. */
10553 read_signatured_type (struct objfile *objfile,
10554 struct signatured_type *type_sig)
10556 gdb_byte *types_ptr = dwarf2_per_objfile->types.buffer + type_sig->offset;
10557 struct die_reader_specs reader_specs;
10558 struct dwarf2_cu *cu;
10559 ULONGEST signature;
10560 struct cleanup *back_to, *free_cu_cleanup;
10561 struct attribute *attr;
10563 gdb_assert (type_sig->per_cu.cu == NULL);
10565 cu = xmalloc (sizeof (struct dwarf2_cu));
10566 memset (cu, 0, sizeof (struct dwarf2_cu));
10567 obstack_init (&cu->comp_unit_obstack);
10568 cu->objfile = objfile;
10569 type_sig->per_cu.cu = cu;
10570 cu->per_cu = &type_sig->per_cu;
10572 /* If an error occurs while loading, release our storage. */
10573 free_cu_cleanup = make_cleanup (free_one_comp_unit, cu);
10575 types_ptr = read_type_comp_unit_head (&cu->header, &signature,
10576 types_ptr, objfile->obfd);
10577 gdb_assert (signature == type_sig->signature);
10580 = htab_create_alloc_ex (cu->header.length / 12,
10584 &cu->comp_unit_obstack,
10585 hashtab_obstack_allocate,
10586 dummy_obstack_deallocate);
10588 dwarf2_read_abbrevs (cu->objfile->obfd, cu);
10589 back_to = make_cleanup (dwarf2_free_abbrev_table, cu);
10591 init_cu_die_reader (&reader_specs, cu);
10593 cu->dies = read_die_and_children (&reader_specs, types_ptr, &types_ptr,
10596 /* We try not to read any attributes in this function, because not
10597 all objfiles needed for references have been loaded yet, and symbol
10598 table processing isn't initialized. But we have to set the CU language,
10599 or we won't be able to build types correctly. */
10600 attr = dwarf2_attr (cu->dies, DW_AT_language, cu);
10602 set_cu_language (DW_UNSND (attr), cu);
10604 set_cu_language (language_minimal, cu);
10606 do_cleanups (back_to);
10608 /* We've successfully allocated this compilation unit. Let our caller
10609 clean it up when finished with it. */
10610 discard_cleanups (free_cu_cleanup);
10612 type_sig->per_cu.cu->read_in_chain = dwarf2_per_objfile->read_in_chain;
10613 dwarf2_per_objfile->read_in_chain = &type_sig->per_cu;
10616 /* Decode simple location descriptions.
10617 Given a pointer to a dwarf block that defines a location, compute
10618 the location and return the value.
10620 NOTE drow/2003-11-18: This function is called in two situations
10621 now: for the address of static or global variables (partial symbols
10622 only) and for offsets into structures which are expected to be
10623 (more or less) constant. The partial symbol case should go away,
10624 and only the constant case should remain. That will let this
10625 function complain more accurately. A few special modes are allowed
10626 without complaint for global variables (for instance, global
10627 register values and thread-local values).
10629 A location description containing no operations indicates that the
10630 object is optimized out. The return value is 0 for that case.
10631 FIXME drow/2003-11-16: No callers check for this case any more; soon all
10632 callers will only want a very basic result and this can become a
10635 Note that stack[0] is unused except as a default error return.
10636 Note that stack overflow is not yet handled. */
10639 decode_locdesc (struct dwarf_block *blk, struct dwarf2_cu *cu)
10641 struct objfile *objfile = cu->objfile;
10642 struct comp_unit_head *cu_header = &cu->header;
10644 int size = blk->size;
10645 gdb_byte *data = blk->data;
10646 CORE_ADDR stack[64];
10648 unsigned int bytes_read, unsnd;
10692 stack[++stacki] = op - DW_OP_lit0;
10727 stack[++stacki] = op - DW_OP_reg0;
10729 dwarf2_complex_location_expr_complaint ();
10733 unsnd = read_unsigned_leb128 (NULL, (data + i), &bytes_read);
10735 stack[++stacki] = unsnd;
10737 dwarf2_complex_location_expr_complaint ();
10741 stack[++stacki] = read_address (objfile->obfd, &data[i],
10746 case DW_OP_const1u:
10747 stack[++stacki] = read_1_byte (objfile->obfd, &data[i]);
10751 case DW_OP_const1s:
10752 stack[++stacki] = read_1_signed_byte (objfile->obfd, &data[i]);
10756 case DW_OP_const2u:
10757 stack[++stacki] = read_2_bytes (objfile->obfd, &data[i]);
10761 case DW_OP_const2s:
10762 stack[++stacki] = read_2_signed_bytes (objfile->obfd, &data[i]);
10766 case DW_OP_const4u:
10767 stack[++stacki] = read_4_bytes (objfile->obfd, &data[i]);
10771 case DW_OP_const4s:
10772 stack[++stacki] = read_4_signed_bytes (objfile->obfd, &data[i]);
10777 stack[++stacki] = read_unsigned_leb128 (NULL, (data + i),
10783 stack[++stacki] = read_signed_leb128 (NULL, (data + i), &bytes_read);
10788 stack[stacki + 1] = stack[stacki];
10793 stack[stacki - 1] += stack[stacki];
10797 case DW_OP_plus_uconst:
10798 stack[stacki] += read_unsigned_leb128 (NULL, (data + i), &bytes_read);
10803 stack[stacki - 1] -= stack[stacki];
10808 /* If we're not the last op, then we definitely can't encode
10809 this using GDB's address_class enum. This is valid for partial
10810 global symbols, although the variable's address will be bogus
10813 dwarf2_complex_location_expr_complaint ();
10816 case DW_OP_GNU_push_tls_address:
10817 /* The top of the stack has the offset from the beginning
10818 of the thread control block at which the variable is located. */
10819 /* Nothing should follow this operator, so the top of stack would
10821 /* This is valid for partial global symbols, but the variable's
10822 address will be bogus in the psymtab. */
10824 dwarf2_complex_location_expr_complaint ();
10827 case DW_OP_GNU_uninit:
10831 complaint (&symfile_complaints, _("unsupported stack op: '%s'"),
10832 dwarf_stack_op_name (op));
10833 return (stack[stacki]);
10836 return (stack[stacki]);
10839 /* memory allocation interface */
10841 static struct dwarf_block *
10842 dwarf_alloc_block (struct dwarf2_cu *cu)
10844 struct dwarf_block *blk;
10846 blk = (struct dwarf_block *)
10847 obstack_alloc (&cu->comp_unit_obstack, sizeof (struct dwarf_block));
10851 static struct abbrev_info *
10852 dwarf_alloc_abbrev (struct dwarf2_cu *cu)
10854 struct abbrev_info *abbrev;
10856 abbrev = (struct abbrev_info *)
10857 obstack_alloc (&cu->abbrev_obstack, sizeof (struct abbrev_info));
10858 memset (abbrev, 0, sizeof (struct abbrev_info));
10862 static struct die_info *
10863 dwarf_alloc_die (struct dwarf2_cu *cu, int num_attrs)
10865 struct die_info *die;
10866 size_t size = sizeof (struct die_info);
10869 size += (num_attrs - 1) * sizeof (struct attribute);
10871 die = (struct die_info *) obstack_alloc (&cu->comp_unit_obstack, size);
10872 memset (die, 0, sizeof (struct die_info));
10877 /* Macro support. */
10880 /* Return the full name of file number I in *LH's file name table.
10881 Use COMP_DIR as the name of the current directory of the
10882 compilation. The result is allocated using xmalloc; the caller is
10883 responsible for freeing it. */
10885 file_full_name (int file, struct line_header *lh, const char *comp_dir)
10887 /* Is the file number a valid index into the line header's file name
10888 table? Remember that file numbers start with one, not zero. */
10889 if (1 <= file && file <= lh->num_file_names)
10891 struct file_entry *fe = &lh->file_names[file - 1];
10893 if (IS_ABSOLUTE_PATH (fe->name))
10894 return xstrdup (fe->name);
10902 dir = lh->include_dirs[fe->dir_index - 1];
10908 dir_len = strlen (dir);
10909 full_name = xmalloc (dir_len + 1 + strlen (fe->name) + 1);
10910 strcpy (full_name, dir);
10911 full_name[dir_len] = '/';
10912 strcpy (full_name + dir_len + 1, fe->name);
10916 return xstrdup (fe->name);
10921 /* The compiler produced a bogus file number. We can at least
10922 record the macro definitions made in the file, even if we
10923 won't be able to find the file by name. */
10924 char fake_name[80];
10925 sprintf (fake_name, "<bad macro file number %d>", file);
10927 complaint (&symfile_complaints,
10928 _("bad file number in macro information (%d)"),
10931 return xstrdup (fake_name);
10936 static struct macro_source_file *
10937 macro_start_file (int file, int line,
10938 struct macro_source_file *current_file,
10939 const char *comp_dir,
10940 struct line_header *lh, struct objfile *objfile)
10942 /* The full name of this source file. */
10943 char *full_name = file_full_name (file, lh, comp_dir);
10945 /* We don't create a macro table for this compilation unit
10946 at all until we actually get a filename. */
10947 if (! pending_macros)
10948 pending_macros = new_macro_table (&objfile->objfile_obstack,
10949 objfile->macro_cache);
10951 if (! current_file)
10952 /* If we have no current file, then this must be the start_file
10953 directive for the compilation unit's main source file. */
10954 current_file = macro_set_main (pending_macros, full_name);
10956 current_file = macro_include (current_file, line, full_name);
10960 return current_file;
10964 /* Copy the LEN characters at BUF to a xmalloc'ed block of memory,
10965 followed by a null byte. */
10967 copy_string (const char *buf, int len)
10969 char *s = xmalloc (len + 1);
10970 memcpy (s, buf, len);
10977 static const char *
10978 consume_improper_spaces (const char *p, const char *body)
10982 complaint (&symfile_complaints,
10983 _("macro definition contains spaces in formal argument list:\n`%s'"),
10995 parse_macro_definition (struct macro_source_file *file, int line,
11000 /* The body string takes one of two forms. For object-like macro
11001 definitions, it should be:
11003 <macro name> " " <definition>
11005 For function-like macro definitions, it should be:
11007 <macro name> "() " <definition>
11009 <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition>
11011 Spaces may appear only where explicitly indicated, and in the
11014 The Dwarf 2 spec says that an object-like macro's name is always
11015 followed by a space, but versions of GCC around March 2002 omit
11016 the space when the macro's definition is the empty string.
11018 The Dwarf 2 spec says that there should be no spaces between the
11019 formal arguments in a function-like macro's formal argument list,
11020 but versions of GCC around March 2002 include spaces after the
11024 /* Find the extent of the macro name. The macro name is terminated
11025 by either a space or null character (for an object-like macro) or
11026 an opening paren (for a function-like macro). */
11027 for (p = body; *p; p++)
11028 if (*p == ' ' || *p == '(')
11031 if (*p == ' ' || *p == '\0')
11033 /* It's an object-like macro. */
11034 int name_len = p - body;
11035 char *name = copy_string (body, name_len);
11036 const char *replacement;
11039 replacement = body + name_len + 1;
11042 dwarf2_macro_malformed_definition_complaint (body);
11043 replacement = body + name_len;
11046 macro_define_object (file, line, name, replacement);
11050 else if (*p == '(')
11052 /* It's a function-like macro. */
11053 char *name = copy_string (body, p - body);
11056 char **argv = xmalloc (argv_size * sizeof (*argv));
11060 p = consume_improper_spaces (p, body);
11062 /* Parse the formal argument list. */
11063 while (*p && *p != ')')
11065 /* Find the extent of the current argument name. */
11066 const char *arg_start = p;
11068 while (*p && *p != ',' && *p != ')' && *p != ' ')
11071 if (! *p || p == arg_start)
11072 dwarf2_macro_malformed_definition_complaint (body);
11075 /* Make sure argv has room for the new argument. */
11076 if (argc >= argv_size)
11079 argv = xrealloc (argv, argv_size * sizeof (*argv));
11082 argv[argc++] = copy_string (arg_start, p - arg_start);
11085 p = consume_improper_spaces (p, body);
11087 /* Consume the comma, if present. */
11092 p = consume_improper_spaces (p, body);
11101 /* Perfectly formed definition, no complaints. */
11102 macro_define_function (file, line, name,
11103 argc, (const char **) argv,
11105 else if (*p == '\0')
11107 /* Complain, but do define it. */
11108 dwarf2_macro_malformed_definition_complaint (body);
11109 macro_define_function (file, line, name,
11110 argc, (const char **) argv,
11114 /* Just complain. */
11115 dwarf2_macro_malformed_definition_complaint (body);
11118 /* Just complain. */
11119 dwarf2_macro_malformed_definition_complaint (body);
11125 for (i = 0; i < argc; i++)
11131 dwarf2_macro_malformed_definition_complaint (body);
11136 dwarf_decode_macros (struct line_header *lh, unsigned int offset,
11137 char *comp_dir, bfd *abfd,
11138 struct dwarf2_cu *cu)
11140 gdb_byte *mac_ptr, *mac_end;
11141 struct macro_source_file *current_file = 0;
11142 enum dwarf_macinfo_record_type macinfo_type;
11143 int at_commandline;
11145 if (dwarf2_per_objfile->macinfo.buffer == NULL)
11147 complaint (&symfile_complaints, _("missing .debug_macinfo section"));
11151 /* First pass: Find the name of the base filename.
11152 This filename is needed in order to process all macros whose definition
11153 (or undefinition) comes from the command line. These macros are defined
11154 before the first DW_MACINFO_start_file entry, and yet still need to be
11155 associated to the base file.
11157 To determine the base file name, we scan the macro definitions until we
11158 reach the first DW_MACINFO_start_file entry. We then initialize
11159 CURRENT_FILE accordingly so that any macro definition found before the
11160 first DW_MACINFO_start_file can still be associated to the base file. */
11162 mac_ptr = dwarf2_per_objfile->macinfo.buffer + offset;
11163 mac_end = dwarf2_per_objfile->macinfo.buffer
11164 + dwarf2_per_objfile->macinfo.size;
11168 /* Do we at least have room for a macinfo type byte? */
11169 if (mac_ptr >= mac_end)
11171 /* Complaint is printed during the second pass as GDB will probably
11172 stop the first pass earlier upon finding DW_MACINFO_start_file. */
11176 macinfo_type = read_1_byte (abfd, mac_ptr);
11179 switch (macinfo_type)
11181 /* A zero macinfo type indicates the end of the macro
11186 case DW_MACINFO_define:
11187 case DW_MACINFO_undef:
11188 /* Only skip the data by MAC_PTR. */
11190 unsigned int bytes_read;
11192 read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
11193 mac_ptr += bytes_read;
11194 read_string (abfd, mac_ptr, &bytes_read);
11195 mac_ptr += bytes_read;
11199 case DW_MACINFO_start_file:
11201 unsigned int bytes_read;
11204 line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
11205 mac_ptr += bytes_read;
11206 file = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
11207 mac_ptr += bytes_read;
11209 current_file = macro_start_file (file, line, current_file, comp_dir,
11214 case DW_MACINFO_end_file:
11215 /* No data to skip by MAC_PTR. */
11218 case DW_MACINFO_vendor_ext:
11219 /* Only skip the data by MAC_PTR. */
11221 unsigned int bytes_read;
11223 read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
11224 mac_ptr += bytes_read;
11225 read_string (abfd, mac_ptr, &bytes_read);
11226 mac_ptr += bytes_read;
11233 } while (macinfo_type != 0 && current_file == NULL);
11235 /* Second pass: Process all entries.
11237 Use the AT_COMMAND_LINE flag to determine whether we are still processing
11238 command-line macro definitions/undefinitions. This flag is unset when we
11239 reach the first DW_MACINFO_start_file entry. */
11241 mac_ptr = dwarf2_per_objfile->macinfo.buffer + offset;
11243 /* Determines if GDB is still before first DW_MACINFO_start_file. If true
11244 GDB is still reading the definitions from command line. First
11245 DW_MACINFO_start_file will need to be ignored as it was already executed
11246 to create CURRENT_FILE for the main source holding also the command line
11247 definitions. On first met DW_MACINFO_start_file this flag is reset to
11248 normally execute all the remaining DW_MACINFO_start_file macinfos. */
11250 at_commandline = 1;
11254 /* Do we at least have room for a macinfo type byte? */
11255 if (mac_ptr >= mac_end)
11257 dwarf2_macros_too_long_complaint ();
11261 macinfo_type = read_1_byte (abfd, mac_ptr);
11264 switch (macinfo_type)
11266 /* A zero macinfo type indicates the end of the macro
11271 case DW_MACINFO_define:
11272 case DW_MACINFO_undef:
11274 unsigned int bytes_read;
11278 line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
11279 mac_ptr += bytes_read;
11280 body = read_string (abfd, mac_ptr, &bytes_read);
11281 mac_ptr += bytes_read;
11283 if (! current_file)
11285 /* DWARF violation as no main source is present. */
11286 complaint (&symfile_complaints,
11287 _("debug info with no main source gives macro %s "
11289 macinfo_type == DW_MACINFO_define ?
11291 macinfo_type == DW_MACINFO_undef ?
11292 _("undefinition") :
11293 _("something-or-other"), line, body);
11296 if ((line == 0 && !at_commandline) || (line != 0 && at_commandline))
11297 complaint (&symfile_complaints,
11298 _("debug info gives %s macro %s with %s line %d: %s"),
11299 at_commandline ? _("command-line") : _("in-file"),
11300 macinfo_type == DW_MACINFO_define ?
11302 macinfo_type == DW_MACINFO_undef ?
11303 _("undefinition") :
11304 _("something-or-other"),
11305 line == 0 ? _("zero") : _("non-zero"), line, body);
11307 if (macinfo_type == DW_MACINFO_define)
11308 parse_macro_definition (current_file, line, body);
11309 else if (macinfo_type == DW_MACINFO_undef)
11310 macro_undef (current_file, line, body);
11314 case DW_MACINFO_start_file:
11316 unsigned int bytes_read;
11319 line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
11320 mac_ptr += bytes_read;
11321 file = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
11322 mac_ptr += bytes_read;
11324 if ((line == 0 && !at_commandline) || (line != 0 && at_commandline))
11325 complaint (&symfile_complaints,
11326 _("debug info gives source %d included "
11327 "from %s at %s line %d"),
11328 file, at_commandline ? _("command-line") : _("file"),
11329 line == 0 ? _("zero") : _("non-zero"), line);
11331 if (at_commandline)
11333 /* This DW_MACINFO_start_file was executed in the pass one. */
11334 at_commandline = 0;
11337 current_file = macro_start_file (file, line,
11338 current_file, comp_dir,
11343 case DW_MACINFO_end_file:
11344 if (! current_file)
11345 complaint (&symfile_complaints,
11346 _("macro debug info has an unmatched `close_file' directive"));
11349 current_file = current_file->included_by;
11350 if (! current_file)
11352 enum dwarf_macinfo_record_type next_type;
11354 /* GCC circa March 2002 doesn't produce the zero
11355 type byte marking the end of the compilation
11356 unit. Complain if it's not there, but exit no
11359 /* Do we at least have room for a macinfo type byte? */
11360 if (mac_ptr >= mac_end)
11362 dwarf2_macros_too_long_complaint ();
11366 /* We don't increment mac_ptr here, so this is just
11368 next_type = read_1_byte (abfd, mac_ptr);
11369 if (next_type != 0)
11370 complaint (&symfile_complaints,
11371 _("no terminating 0-type entry for macros in `.debug_macinfo' section"));
11378 case DW_MACINFO_vendor_ext:
11380 unsigned int bytes_read;
11384 constant = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
11385 mac_ptr += bytes_read;
11386 string = read_string (abfd, mac_ptr, &bytes_read);
11387 mac_ptr += bytes_read;
11389 /* We don't recognize any vendor extensions. */
11393 } while (macinfo_type != 0);
11396 /* Check if the attribute's form is a DW_FORM_block*
11397 if so return true else false. */
11399 attr_form_is_block (struct attribute *attr)
11401 return (attr == NULL ? 0 :
11402 attr->form == DW_FORM_block1
11403 || attr->form == DW_FORM_block2
11404 || attr->form == DW_FORM_block4
11405 || attr->form == DW_FORM_block);
11408 /* Return non-zero if ATTR's value is a section offset --- classes
11409 lineptr, loclistptr, macptr or rangelistptr --- or zero, otherwise.
11410 You may use DW_UNSND (attr) to retrieve such offsets.
11412 Section 7.5.4, "Attribute Encodings", explains that no attribute
11413 may have a value that belongs to more than one of these classes; it
11414 would be ambiguous if we did, because we use the same forms for all
11417 attr_form_is_section_offset (struct attribute *attr)
11419 return (attr->form == DW_FORM_data4
11420 || attr->form == DW_FORM_data8);
11424 /* Return non-zero if ATTR's value falls in the 'constant' class, or
11425 zero otherwise. When this function returns true, you can apply
11426 dwarf2_get_attr_constant_value to it.
11428 However, note that for some attributes you must check
11429 attr_form_is_section_offset before using this test. DW_FORM_data4
11430 and DW_FORM_data8 are members of both the constant class, and of
11431 the classes that contain offsets into other debug sections
11432 (lineptr, loclistptr, macptr or rangelistptr). The DWARF spec says
11433 that, if an attribute's can be either a constant or one of the
11434 section offset classes, DW_FORM_data4 and DW_FORM_data8 should be
11435 taken as section offsets, not constants. */
11437 attr_form_is_constant (struct attribute *attr)
11439 switch (attr->form)
11441 case DW_FORM_sdata:
11442 case DW_FORM_udata:
11443 case DW_FORM_data1:
11444 case DW_FORM_data2:
11445 case DW_FORM_data4:
11446 case DW_FORM_data8:
11454 dwarf2_symbol_mark_computed (struct attribute *attr, struct symbol *sym,
11455 struct dwarf2_cu *cu)
11457 if (attr_form_is_section_offset (attr)
11458 /* ".debug_loc" may not exist at all, or the offset may be outside
11459 the section. If so, fall through to the complaint in the
11461 && DW_UNSND (attr) < dwarf2_per_objfile->loc.size)
11463 struct dwarf2_loclist_baton *baton;
11465 baton = obstack_alloc (&cu->objfile->objfile_obstack,
11466 sizeof (struct dwarf2_loclist_baton));
11467 baton->per_cu = cu->per_cu;
11468 gdb_assert (baton->per_cu);
11470 /* We don't know how long the location list is, but make sure we
11471 don't run off the edge of the section. */
11472 baton->size = dwarf2_per_objfile->loc.size - DW_UNSND (attr);
11473 baton->data = dwarf2_per_objfile->loc.buffer + DW_UNSND (attr);
11474 baton->base_address = cu->base_address;
11475 if (cu->base_known == 0)
11476 complaint (&symfile_complaints,
11477 _("Location list used without specifying the CU base address."));
11479 SYMBOL_COMPUTED_OPS (sym) = &dwarf2_loclist_funcs;
11480 SYMBOL_LOCATION_BATON (sym) = baton;
11484 struct dwarf2_locexpr_baton *baton;
11486 baton = obstack_alloc (&cu->objfile->objfile_obstack,
11487 sizeof (struct dwarf2_locexpr_baton));
11488 baton->per_cu = cu->per_cu;
11489 gdb_assert (baton->per_cu);
11491 if (attr_form_is_block (attr))
11493 /* Note that we're just copying the block's data pointer
11494 here, not the actual data. We're still pointing into the
11495 info_buffer for SYM's objfile; right now we never release
11496 that buffer, but when we do clean up properly this may
11498 baton->size = DW_BLOCK (attr)->size;
11499 baton->data = DW_BLOCK (attr)->data;
11503 dwarf2_invalid_attrib_class_complaint ("location description",
11504 SYMBOL_NATURAL_NAME (sym));
11506 baton->data = NULL;
11509 SYMBOL_COMPUTED_OPS (sym) = &dwarf2_locexpr_funcs;
11510 SYMBOL_LOCATION_BATON (sym) = baton;
11514 /* Return the OBJFILE associated with the compilation unit CU. */
11517 dwarf2_per_cu_objfile (struct dwarf2_per_cu_data *per_cu)
11519 struct objfile *objfile = per_cu->psymtab->objfile;
11521 /* Return the master objfile, so that we can report and look up the
11522 correct file containing this variable. */
11523 if (objfile->separate_debug_objfile_backlink)
11524 objfile = objfile->separate_debug_objfile_backlink;
11529 /* Return the address size given in the compilation unit header for CU. */
11532 dwarf2_per_cu_addr_size (struct dwarf2_per_cu_data *per_cu)
11535 return per_cu->cu->header.addr_size;
11538 /* If the CU is not currently read in, we re-read its header. */
11539 struct objfile *objfile = per_cu->psymtab->objfile;
11540 struct dwarf2_per_objfile *per_objfile
11541 = objfile_data (objfile, dwarf2_objfile_data_key);
11542 gdb_byte *info_ptr = per_objfile->info.buffer + per_cu->offset;
11544 struct comp_unit_head cu_header;
11545 memset (&cu_header, 0, sizeof cu_header);
11546 read_comp_unit_head (&cu_header, info_ptr, objfile->obfd);
11547 return cu_header.addr_size;
11551 /* Locate the .debug_info compilation unit from CU's objfile which contains
11552 the DIE at OFFSET. Raises an error on failure. */
11554 static struct dwarf2_per_cu_data *
11555 dwarf2_find_containing_comp_unit (unsigned int offset,
11556 struct objfile *objfile)
11558 struct dwarf2_per_cu_data *this_cu;
11562 high = dwarf2_per_objfile->n_comp_units - 1;
11565 int mid = low + (high - low) / 2;
11566 if (dwarf2_per_objfile->all_comp_units[mid]->offset >= offset)
11571 gdb_assert (low == high);
11572 if (dwarf2_per_objfile->all_comp_units[low]->offset > offset)
11575 error (_("Dwarf Error: could not find partial DIE containing "
11576 "offset 0x%lx [in module %s]"),
11577 (long) offset, bfd_get_filename (objfile->obfd));
11579 gdb_assert (dwarf2_per_objfile->all_comp_units[low-1]->offset <= offset);
11580 return dwarf2_per_objfile->all_comp_units[low-1];
11584 this_cu = dwarf2_per_objfile->all_comp_units[low];
11585 if (low == dwarf2_per_objfile->n_comp_units - 1
11586 && offset >= this_cu->offset + this_cu->length)
11587 error (_("invalid dwarf2 offset %u"), offset);
11588 gdb_assert (offset < this_cu->offset + this_cu->length);
11593 /* Locate the compilation unit from OBJFILE which is located at exactly
11594 OFFSET. Raises an error on failure. */
11596 static struct dwarf2_per_cu_data *
11597 dwarf2_find_comp_unit (unsigned int offset, struct objfile *objfile)
11599 struct dwarf2_per_cu_data *this_cu;
11600 this_cu = dwarf2_find_containing_comp_unit (offset, objfile);
11601 if (this_cu->offset != offset)
11602 error (_("no compilation unit with offset %u."), offset);
11606 /* Malloc space for a dwarf2_cu for OBJFILE and initialize it. */
11608 static struct dwarf2_cu *
11609 alloc_one_comp_unit (struct objfile *objfile)
11611 struct dwarf2_cu *cu = xcalloc (1, sizeof (struct dwarf2_cu));
11612 cu->objfile = objfile;
11613 obstack_init (&cu->comp_unit_obstack);
11617 /* Release one cached compilation unit, CU. We unlink it from the tree
11618 of compilation units, but we don't remove it from the read_in_chain;
11619 the caller is responsible for that.
11620 NOTE: DATA is a void * because this function is also used as a
11621 cleanup routine. */
11624 free_one_comp_unit (void *data)
11626 struct dwarf2_cu *cu = data;
11628 if (cu->per_cu != NULL)
11629 cu->per_cu->cu = NULL;
11632 obstack_free (&cu->comp_unit_obstack, NULL);
11637 /* This cleanup function is passed the address of a dwarf2_cu on the stack
11638 when we're finished with it. We can't free the pointer itself, but be
11639 sure to unlink it from the cache. Also release any associated storage
11640 and perform cache maintenance.
11642 Only used during partial symbol parsing. */
11645 free_stack_comp_unit (void *data)
11647 struct dwarf2_cu *cu = data;
11649 obstack_free (&cu->comp_unit_obstack, NULL);
11650 cu->partial_dies = NULL;
11652 if (cu->per_cu != NULL)
11654 /* This compilation unit is on the stack in our caller, so we
11655 should not xfree it. Just unlink it. */
11656 cu->per_cu->cu = NULL;
11659 /* If we had a per-cu pointer, then we may have other compilation
11660 units loaded, so age them now. */
11661 age_cached_comp_units ();
11665 /* Free all cached compilation units. */
11668 free_cached_comp_units (void *data)
11670 struct dwarf2_per_cu_data *per_cu, **last_chain;
11672 per_cu = dwarf2_per_objfile->read_in_chain;
11673 last_chain = &dwarf2_per_objfile->read_in_chain;
11674 while (per_cu != NULL)
11676 struct dwarf2_per_cu_data *next_cu;
11678 next_cu = per_cu->cu->read_in_chain;
11680 free_one_comp_unit (per_cu->cu);
11681 *last_chain = next_cu;
11687 /* Increase the age counter on each cached compilation unit, and free
11688 any that are too old. */
11691 age_cached_comp_units (void)
11693 struct dwarf2_per_cu_data *per_cu, **last_chain;
11695 dwarf2_clear_marks (dwarf2_per_objfile->read_in_chain);
11696 per_cu = dwarf2_per_objfile->read_in_chain;
11697 while (per_cu != NULL)
11699 per_cu->cu->last_used ++;
11700 if (per_cu->cu->last_used <= dwarf2_max_cache_age)
11701 dwarf2_mark (per_cu->cu);
11702 per_cu = per_cu->cu->read_in_chain;
11705 per_cu = dwarf2_per_objfile->read_in_chain;
11706 last_chain = &dwarf2_per_objfile->read_in_chain;
11707 while (per_cu != NULL)
11709 struct dwarf2_per_cu_data *next_cu;
11711 next_cu = per_cu->cu->read_in_chain;
11713 if (!per_cu->cu->mark)
11715 free_one_comp_unit (per_cu->cu);
11716 *last_chain = next_cu;
11719 last_chain = &per_cu->cu->read_in_chain;
11725 /* Remove a single compilation unit from the cache. */
11728 free_one_cached_comp_unit (void *target_cu)
11730 struct dwarf2_per_cu_data *per_cu, **last_chain;
11732 per_cu = dwarf2_per_objfile->read_in_chain;
11733 last_chain = &dwarf2_per_objfile->read_in_chain;
11734 while (per_cu != NULL)
11736 struct dwarf2_per_cu_data *next_cu;
11738 next_cu = per_cu->cu->read_in_chain;
11740 if (per_cu->cu == target_cu)
11742 free_one_comp_unit (per_cu->cu);
11743 *last_chain = next_cu;
11747 last_chain = &per_cu->cu->read_in_chain;
11753 /* Release all extra memory associated with OBJFILE. */
11756 dwarf2_free_objfile (struct objfile *objfile)
11758 dwarf2_per_objfile = objfile_data (objfile, dwarf2_objfile_data_key);
11760 if (dwarf2_per_objfile == NULL)
11763 /* Cached DIE trees use xmalloc and the comp_unit_obstack. */
11764 free_cached_comp_units (NULL);
11766 /* Everything else should be on the objfile obstack. */
11769 /* A pair of DIE offset and GDB type pointer. We store these
11770 in a hash table separate from the DIEs, and preserve them
11771 when the DIEs are flushed out of cache. */
11773 struct dwarf2_offset_and_type
11775 unsigned int offset;
11779 /* Hash function for a dwarf2_offset_and_type. */
11782 offset_and_type_hash (const void *item)
11784 const struct dwarf2_offset_and_type *ofs = item;
11785 return ofs->offset;
11788 /* Equality function for a dwarf2_offset_and_type. */
11791 offset_and_type_eq (const void *item_lhs, const void *item_rhs)
11793 const struct dwarf2_offset_and_type *ofs_lhs = item_lhs;
11794 const struct dwarf2_offset_and_type *ofs_rhs = item_rhs;
11795 return ofs_lhs->offset == ofs_rhs->offset;
11798 /* Set the type associated with DIE to TYPE. Save it in CU's hash
11799 table if necessary. For convenience, return TYPE. */
11801 static struct type *
11802 set_die_type (struct die_info *die, struct type *type, struct dwarf2_cu *cu)
11804 struct dwarf2_offset_and_type **slot, ofs;
11806 /* For Ada types, make sure that the gnat-specific data is always
11807 initialized (if not already set). There are a few types where
11808 we should not be doing so, because the type-specific area is
11809 already used to hold some other piece of info (eg: TYPE_CODE_FLT
11810 where the type-specific area is used to store the floatformat).
11811 But this is not a problem, because the gnat-specific information
11812 is actually not needed for these types. */
11813 if (need_gnat_info (cu)
11814 && TYPE_CODE (type) != TYPE_CODE_FUNC
11815 && TYPE_CODE (type) != TYPE_CODE_FLT
11816 && !HAVE_GNAT_AUX_INFO (type))
11817 INIT_GNAT_SPECIFIC (type);
11819 if (cu->type_hash == NULL)
11821 gdb_assert (cu->per_cu != NULL);
11822 cu->per_cu->type_hash
11823 = htab_create_alloc_ex (cu->header.length / 24,
11824 offset_and_type_hash,
11825 offset_and_type_eq,
11827 &cu->objfile->objfile_obstack,
11828 hashtab_obstack_allocate,
11829 dummy_obstack_deallocate);
11830 cu->type_hash = cu->per_cu->type_hash;
11833 ofs.offset = die->offset;
11835 slot = (struct dwarf2_offset_and_type **)
11836 htab_find_slot_with_hash (cu->type_hash, &ofs, ofs.offset, INSERT);
11837 *slot = obstack_alloc (&cu->objfile->objfile_obstack, sizeof (**slot));
11842 /* Find the type for DIE in CU's type_hash, or return NULL if DIE does
11843 not have a saved type. */
11845 static struct type *
11846 get_die_type (struct die_info *die, struct dwarf2_cu *cu)
11848 struct dwarf2_offset_and_type *slot, ofs;
11849 htab_t type_hash = cu->type_hash;
11851 if (type_hash == NULL)
11854 ofs.offset = die->offset;
11855 slot = htab_find_with_hash (type_hash, &ofs, ofs.offset);
11862 /* Add a dependence relationship from CU to REF_PER_CU. */
11865 dwarf2_add_dependence (struct dwarf2_cu *cu,
11866 struct dwarf2_per_cu_data *ref_per_cu)
11870 if (cu->dependencies == NULL)
11872 = htab_create_alloc_ex (5, htab_hash_pointer, htab_eq_pointer,
11873 NULL, &cu->comp_unit_obstack,
11874 hashtab_obstack_allocate,
11875 dummy_obstack_deallocate);
11877 slot = htab_find_slot (cu->dependencies, ref_per_cu, INSERT);
11879 *slot = ref_per_cu;
11882 /* Subroutine of dwarf2_mark to pass to htab_traverse.
11883 Set the mark field in every compilation unit in the
11884 cache that we must keep because we are keeping CU. */
11887 dwarf2_mark_helper (void **slot, void *data)
11889 struct dwarf2_per_cu_data *per_cu;
11891 per_cu = (struct dwarf2_per_cu_data *) *slot;
11892 if (per_cu->cu->mark)
11894 per_cu->cu->mark = 1;
11896 if (per_cu->cu->dependencies != NULL)
11897 htab_traverse (per_cu->cu->dependencies, dwarf2_mark_helper, NULL);
11902 /* Set the mark field in CU and in every other compilation unit in the
11903 cache that we must keep because we are keeping CU. */
11906 dwarf2_mark (struct dwarf2_cu *cu)
11911 if (cu->dependencies != NULL)
11912 htab_traverse (cu->dependencies, dwarf2_mark_helper, NULL);
11916 dwarf2_clear_marks (struct dwarf2_per_cu_data *per_cu)
11920 per_cu->cu->mark = 0;
11921 per_cu = per_cu->cu->read_in_chain;
11925 /* Trivial hash function for partial_die_info: the hash value of a DIE
11926 is its offset in .debug_info for this objfile. */
11929 partial_die_hash (const void *item)
11931 const struct partial_die_info *part_die = item;
11932 return part_die->offset;
11935 /* Trivial comparison function for partial_die_info structures: two DIEs
11936 are equal if they have the same offset. */
11939 partial_die_eq (const void *item_lhs, const void *item_rhs)
11941 const struct partial_die_info *part_die_lhs = item_lhs;
11942 const struct partial_die_info *part_die_rhs = item_rhs;
11943 return part_die_lhs->offset == part_die_rhs->offset;
11946 static struct cmd_list_element *set_dwarf2_cmdlist;
11947 static struct cmd_list_element *show_dwarf2_cmdlist;
11950 set_dwarf2_cmd (char *args, int from_tty)
11952 help_list (set_dwarf2_cmdlist, "maintenance set dwarf2 ", -1, gdb_stdout);
11956 show_dwarf2_cmd (char *args, int from_tty)
11958 cmd_show_list (show_dwarf2_cmdlist, from_tty, "");
11961 /* If section described by INFO was mmapped, munmap it now. */
11964 munmap_section_buffer (struct dwarf2_section_info *info)
11966 if (info->was_mmapped)
11969 intptr_t begin = (intptr_t) info->buffer;
11970 intptr_t map_begin = begin & ~(pagesize - 1);
11971 size_t map_length = info->size + begin - map_begin;
11972 gdb_assert (munmap ((void *) map_begin, map_length) == 0);
11974 /* Without HAVE_MMAP, we should never be here to begin with. */
11980 /* munmap debug sections for OBJFILE, if necessary. */
11983 dwarf2_per_objfile_free (struct objfile *objfile, void *d)
11985 struct dwarf2_per_objfile *data = d;
11986 munmap_section_buffer (&data->info);
11987 munmap_section_buffer (&data->abbrev);
11988 munmap_section_buffer (&data->line);
11989 munmap_section_buffer (&data->str);
11990 munmap_section_buffer (&data->macinfo);
11991 munmap_section_buffer (&data->ranges);
11992 munmap_section_buffer (&data->loc);
11993 munmap_section_buffer (&data->frame);
11994 munmap_section_buffer (&data->eh_frame);
11997 void _initialize_dwarf2_read (void);
12000 _initialize_dwarf2_read (void)
12002 dwarf2_objfile_data_key
12003 = register_objfile_data_with_cleanup (NULL, dwarf2_per_objfile_free);
12005 add_prefix_cmd ("dwarf2", class_maintenance, set_dwarf2_cmd, _("\
12006 Set DWARF 2 specific variables.\n\
12007 Configure DWARF 2 variables such as the cache size"),
12008 &set_dwarf2_cmdlist, "maintenance set dwarf2 ",
12009 0/*allow-unknown*/, &maintenance_set_cmdlist);
12011 add_prefix_cmd ("dwarf2", class_maintenance, show_dwarf2_cmd, _("\
12012 Show DWARF 2 specific variables\n\
12013 Show DWARF 2 variables such as the cache size"),
12014 &show_dwarf2_cmdlist, "maintenance show dwarf2 ",
12015 0/*allow-unknown*/, &maintenance_show_cmdlist);
12017 add_setshow_zinteger_cmd ("max-cache-age", class_obscure,
12018 &dwarf2_max_cache_age, _("\
12019 Set the upper bound on the age of cached dwarf2 compilation units."), _("\
12020 Show the upper bound on the age of cached dwarf2 compilation units."), _("\
12021 A higher limit means that cached compilation units will be stored\n\
12022 in memory longer, and more total memory will be used. Zero disables\n\
12023 caching, which can slow down startup."),
12025 show_dwarf2_max_cache_age,
12026 &set_dwarf2_cmdlist,
12027 &show_dwarf2_cmdlist);
12029 add_setshow_zinteger_cmd ("dwarf2-die", no_class, &dwarf2_die_debug, _("\
12030 Set debugging of the dwarf2 DIE reader."), _("\
12031 Show debugging of the dwarf2 DIE reader."), _("\
12032 When enabled (non-zero), DIEs are dumped after they are read in.\n\
12033 The value is the maximum depth to print."),
12036 &setdebuglist, &showdebuglist);