1 /* Support routines for decoding "stabs" debugging information format.
3 Copyright (C) 1986-2016 Free Software Foundation, Inc.
5 This file is part of GDB.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>. */
20 /* Support routines for reading and decoding debugging information in
21 the "stabs" format. This format is used with many systems that use
22 the a.out object file format, as well as some systems that use
23 COFF or ELF where the stabs data is placed in a special section.
24 Avoid placing any object file format specific code in this file. */
28 #include "gdb_obstack.h"
31 #include "expression.h"
34 #include "aout/stab_gnu.h" /* We always use GNU stabs, not native. */
36 #include "aout/aout64.h"
37 #include "gdb-stabs.h"
39 #include "complaints.h"
41 #include "gdb-demangle.h"
45 #include "cp-support.h"
48 /* Ask stabsread.h to define the vars it normally declares `extern'. */
51 #include "stabsread.h" /* Our own declarations */
54 extern void _initialize_stabsread (void);
58 struct nextfield
*next
;
60 /* This is the raw visibility from the stab. It is not checked
61 for being one of the visibilities we recognize, so code which
62 examines this field better be able to deal. */
68 struct next_fnfieldlist
70 struct next_fnfieldlist
*next
;
71 struct fn_fieldlist fn_fieldlist
;
74 /* The routines that read and process a complete stabs for a C struct or
75 C++ class pass lists of data member fields and lists of member function
76 fields in an instance of a field_info structure, as defined below.
77 This is part of some reorganization of low level C++ support and is
78 expected to eventually go away... (FIXME) */
82 struct nextfield
*list
;
83 struct next_fnfieldlist
*fnlist
;
87 read_one_struct_field (struct field_info
*, char **, char *,
88 struct type
*, struct objfile
*);
90 static struct type
*dbx_alloc_type (int[2], struct objfile
*);
92 static long read_huge_number (char **, int, int *, int);
94 static struct type
*error_type (char **, struct objfile
*);
97 patch_block_stabs (struct pending
*, struct pending_stabs
*,
100 static void fix_common_block (struct symbol
*, CORE_ADDR
);
102 static int read_type_number (char **, int *);
104 static struct type
*read_type (char **, struct objfile
*);
106 static struct type
*read_range_type (char **, int[2], int, struct objfile
*);
108 static struct type
*read_sun_builtin_type (char **, int[2], struct objfile
*);
110 static struct type
*read_sun_floating_type (char **, int[2],
113 static struct type
*read_enum_type (char **, struct type
*, struct objfile
*);
115 static struct type
*rs6000_builtin_type (int, struct objfile
*);
118 read_member_functions (struct field_info
*, char **, struct type
*,
122 read_struct_fields (struct field_info
*, char **, struct type
*,
126 read_baseclasses (struct field_info
*, char **, struct type
*,
130 read_tilde_fields (struct field_info
*, char **, struct type
*,
133 static int attach_fn_fields_to_type (struct field_info
*, struct type
*);
135 static int attach_fields_to_type (struct field_info
*, struct type
*,
138 static struct type
*read_struct_type (char **, struct type
*,
142 static struct type
*read_array_type (char **, struct type
*,
145 static struct field
*read_args (char **, int, struct objfile
*, int *, int *);
147 static void add_undefined_type (struct type
*, int[2]);
150 read_cpp_abbrev (struct field_info
*, char **, struct type
*,
153 static char *find_name_end (char *name
);
155 static int process_reference (char **string
);
157 void stabsread_clear_cache (void);
159 static const char vptr_name
[] = "_vptr$";
160 static const char vb_name
[] = "_vb$";
163 invalid_cpp_abbrev_complaint (const char *arg1
)
165 complaint (&symfile_complaints
, _("invalid C++ abbreviation `%s'"), arg1
);
169 reg_value_complaint (int regnum
, int num_regs
, const char *sym
)
171 complaint (&symfile_complaints
,
172 _("bad register number %d (max %d) in symbol %s"),
173 regnum
, num_regs
- 1, sym
);
177 stabs_general_complaint (const char *arg1
)
179 complaint (&symfile_complaints
, "%s", arg1
);
182 /* Make a list of forward references which haven't been defined. */
184 static struct type
**undef_types
;
185 static int undef_types_allocated
;
186 static int undef_types_length
;
187 static struct symbol
*current_symbol
= NULL
;
189 /* Make a list of nameless types that are undefined.
190 This happens when another type is referenced by its number
191 before this type is actually defined. For instance "t(0,1)=k(0,2)"
192 and type (0,2) is defined only later. */
199 static struct nat
*noname_undefs
;
200 static int noname_undefs_allocated
;
201 static int noname_undefs_length
;
203 /* Check for and handle cretinous stabs symbol name continuation! */
204 #define STABS_CONTINUE(pp,objfile) \
206 if (**(pp) == '\\' || (**(pp) == '?' && (*(pp))[1] == '\0')) \
207 *(pp) = next_symbol_text (objfile); \
210 /* Vector of types defined so far, indexed by their type numbers.
211 (In newer sun systems, dbx uses a pair of numbers in parens,
212 as in "(SUBFILENUM,NUMWITHINSUBFILE)".
213 Then these numbers must be translated through the type_translations
214 hash table to get the index into the type vector.) */
216 static struct type
**type_vector
;
218 /* Number of elements allocated for type_vector currently. */
220 static int type_vector_length
;
222 /* Initial size of type vector. Is realloc'd larger if needed, and
223 realloc'd down to the size actually used, when completed. */
225 #define INITIAL_TYPE_VECTOR_LENGTH 160
228 /* Look up a dbx type-number pair. Return the address of the slot
229 where the type for that number-pair is stored.
230 The number-pair is in TYPENUMS.
232 This can be used for finding the type associated with that pair
233 or for associating a new type with the pair. */
235 static struct type
**
236 dbx_lookup_type (int typenums
[2], struct objfile
*objfile
)
238 int filenum
= typenums
[0];
239 int index
= typenums
[1];
242 struct header_file
*f
;
245 if (filenum
== -1) /* -1,-1 is for temporary types. */
248 if (filenum
< 0 || filenum
>= n_this_object_header_files
)
250 complaint (&symfile_complaints
,
251 _("Invalid symbol data: type number "
252 "(%d,%d) out of range at symtab pos %d."),
253 filenum
, index
, symnum
);
261 /* Caller wants address of address of type. We think
262 that negative (rs6k builtin) types will never appear as
263 "lvalues", (nor should they), so we stuff the real type
264 pointer into a temp, and return its address. If referenced,
265 this will do the right thing. */
266 static struct type
*temp_type
;
268 temp_type
= rs6000_builtin_type (index
, objfile
);
272 /* Type is defined outside of header files.
273 Find it in this object file's type vector. */
274 if (index
>= type_vector_length
)
276 old_len
= type_vector_length
;
279 type_vector_length
= INITIAL_TYPE_VECTOR_LENGTH
;
280 type_vector
= XNEWVEC (struct type
*, type_vector_length
);
282 while (index
>= type_vector_length
)
284 type_vector_length
*= 2;
286 type_vector
= (struct type
**)
287 xrealloc ((char *) type_vector
,
288 (type_vector_length
* sizeof (struct type
*)));
289 memset (&type_vector
[old_len
], 0,
290 (type_vector_length
- old_len
) * sizeof (struct type
*));
292 return (&type_vector
[index
]);
296 real_filenum
= this_object_header_files
[filenum
];
298 if (real_filenum
>= N_HEADER_FILES (objfile
))
300 static struct type
*temp_type
;
302 warning (_("GDB internal error: bad real_filenum"));
305 temp_type
= objfile_type (objfile
)->builtin_error
;
309 f
= HEADER_FILES (objfile
) + real_filenum
;
311 f_orig_length
= f
->length
;
312 if (index
>= f_orig_length
)
314 while (index
>= f
->length
)
318 f
->vector
= (struct type
**)
319 xrealloc ((char *) f
->vector
, f
->length
* sizeof (struct type
*));
320 memset (&f
->vector
[f_orig_length
], 0,
321 (f
->length
- f_orig_length
) * sizeof (struct type
*));
323 return (&f
->vector
[index
]);
327 /* Make sure there is a type allocated for type numbers TYPENUMS
328 and return the type object.
329 This can create an empty (zeroed) type object.
330 TYPENUMS may be (-1, -1) to return a new type object that is not
331 put into the type vector, and so may not be referred to by number. */
334 dbx_alloc_type (int typenums
[2], struct objfile
*objfile
)
336 struct type
**type_addr
;
338 if (typenums
[0] == -1)
340 return (alloc_type (objfile
));
343 type_addr
= dbx_lookup_type (typenums
, objfile
);
345 /* If we are referring to a type not known at all yet,
346 allocate an empty type for it.
347 We will fill it in later if we find out how. */
350 *type_addr
= alloc_type (objfile
);
356 /* Allocate a floating-point type of size BITS. */
359 dbx_init_float_type (struct objfile
*objfile
, int bits
)
361 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
362 const struct floatformat
**format
;
365 format
= gdbarch_floatformat_for_type (gdbarch
, NULL
, bits
);
367 type
= init_float_type (objfile
, bits
, NULL
, format
);
369 type
= init_type (objfile
, TYPE_CODE_ERROR
, bits
/ TARGET_CHAR_BIT
, NULL
);
374 /* for all the stabs in a given stab vector, build appropriate types
375 and fix their symbols in given symbol vector. */
378 patch_block_stabs (struct pending
*symbols
, struct pending_stabs
*stabs
,
379 struct objfile
*objfile
)
388 /* for all the stab entries, find their corresponding symbols and
389 patch their types! */
391 for (ii
= 0; ii
< stabs
->count
; ++ii
)
393 name
= stabs
->stab
[ii
];
394 pp
= (char *) strchr (name
, ':');
395 gdb_assert (pp
); /* Must find a ':' or game's over. */
399 pp
= (char *) strchr (pp
, ':');
401 sym
= find_symbol_in_list (symbols
, name
, pp
- name
);
404 /* FIXME-maybe: it would be nice if we noticed whether
405 the variable was defined *anywhere*, not just whether
406 it is defined in this compilation unit. But neither
407 xlc or GCC seem to need such a definition, and until
408 we do psymtabs (so that the minimal symbols from all
409 compilation units are available now), I'm not sure
410 how to get the information. */
412 /* On xcoff, if a global is defined and never referenced,
413 ld will remove it from the executable. There is then
414 a N_GSYM stab for it, but no regular (C_EXT) symbol. */
415 sym
= allocate_symbol (objfile
);
416 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
417 SYMBOL_ACLASS_INDEX (sym
) = LOC_OPTIMIZED_OUT
;
418 SYMBOL_SET_LINKAGE_NAME
419 (sym
, (char *) obstack_copy0 (&objfile
->objfile_obstack
,
422 if (*(pp
- 1) == 'F' || *(pp
- 1) == 'f')
424 /* I don't think the linker does this with functions,
425 so as far as I know this is never executed.
426 But it doesn't hurt to check. */
428 lookup_function_type (read_type (&pp
, objfile
));
432 SYMBOL_TYPE (sym
) = read_type (&pp
, objfile
);
434 add_symbol_to_list (sym
, &global_symbols
);
439 if (*(pp
- 1) == 'F' || *(pp
- 1) == 'f')
442 lookup_function_type (read_type (&pp
, objfile
));
446 SYMBOL_TYPE (sym
) = read_type (&pp
, objfile
);
454 /* Read a number by which a type is referred to in dbx data,
455 or perhaps read a pair (FILENUM, TYPENUM) in parentheses.
456 Just a single number N is equivalent to (0,N).
457 Return the two numbers by storing them in the vector TYPENUMS.
458 TYPENUMS will then be used as an argument to dbx_lookup_type.
460 Returns 0 for success, -1 for error. */
463 read_type_number (char **pp
, int *typenums
)
470 typenums
[0] = read_huge_number (pp
, ',', &nbits
, 0);
473 typenums
[1] = read_huge_number (pp
, ')', &nbits
, 0);
480 typenums
[1] = read_huge_number (pp
, 0, &nbits
, 0);
488 #define VISIBILITY_PRIVATE '0' /* Stabs character for private field */
489 #define VISIBILITY_PROTECTED '1' /* Stabs character for protected fld */
490 #define VISIBILITY_PUBLIC '2' /* Stabs character for public field */
491 #define VISIBILITY_IGNORE '9' /* Optimized out or zero length */
493 /* Structure for storing pointers to reference definitions for fast lookup
494 during "process_later". */
503 #define MAX_CHUNK_REFS 100
504 #define REF_CHUNK_SIZE (MAX_CHUNK_REFS * sizeof (struct ref_map))
505 #define REF_MAP_SIZE(ref_chunk) ((ref_chunk) * REF_CHUNK_SIZE)
507 static struct ref_map
*ref_map
;
509 /* Ptr to free cell in chunk's linked list. */
510 static int ref_count
= 0;
512 /* Number of chunks malloced. */
513 static int ref_chunk
= 0;
515 /* This file maintains a cache of stabs aliases found in the symbol
516 table. If the symbol table changes, this cache must be cleared
517 or we are left holding onto data in invalid obstacks. */
519 stabsread_clear_cache (void)
525 /* Create array of pointers mapping refids to symbols and stab strings.
526 Add pointers to reference definition symbols and/or their values as we
527 find them, using their reference numbers as our index.
528 These will be used later when we resolve references. */
530 ref_add (int refnum
, struct symbol
*sym
, char *stabs
, CORE_ADDR value
)
534 if (refnum
>= ref_count
)
535 ref_count
= refnum
+ 1;
536 if (ref_count
> ref_chunk
* MAX_CHUNK_REFS
)
538 int new_slots
= ref_count
- ref_chunk
* MAX_CHUNK_REFS
;
539 int new_chunks
= new_slots
/ MAX_CHUNK_REFS
+ 1;
541 ref_map
= (struct ref_map
*)
542 xrealloc (ref_map
, REF_MAP_SIZE (ref_chunk
+ new_chunks
));
543 memset (ref_map
+ ref_chunk
* MAX_CHUNK_REFS
, 0,
544 new_chunks
* REF_CHUNK_SIZE
);
545 ref_chunk
+= new_chunks
;
547 ref_map
[refnum
].stabs
= stabs
;
548 ref_map
[refnum
].sym
= sym
;
549 ref_map
[refnum
].value
= value
;
552 /* Return defined sym for the reference REFNUM. */
554 ref_search (int refnum
)
556 if (refnum
< 0 || refnum
> ref_count
)
558 return ref_map
[refnum
].sym
;
561 /* Parse a reference id in STRING and return the resulting
562 reference number. Move STRING beyond the reference id. */
565 process_reference (char **string
)
573 /* Advance beyond the initial '#'. */
576 /* Read number as reference id. */
577 while (*p
&& isdigit (*p
))
579 refnum
= refnum
* 10 + *p
- '0';
586 /* If STRING defines a reference, store away a pointer to the reference
587 definition for later use. Return the reference number. */
590 symbol_reference_defined (char **string
)
595 refnum
= process_reference (&p
);
597 /* Defining symbols end in '='. */
600 /* Symbol is being defined here. */
606 /* Must be a reference. Either the symbol has already been defined,
607 or this is a forward reference to it. */
614 stab_reg_to_regnum (struct symbol
*sym
, struct gdbarch
*gdbarch
)
616 int regno
= gdbarch_stab_reg_to_regnum (gdbarch
, SYMBOL_VALUE (sym
));
619 || regno
>= (gdbarch_num_regs (gdbarch
)
620 + gdbarch_num_pseudo_regs (gdbarch
)))
622 reg_value_complaint (regno
,
623 gdbarch_num_regs (gdbarch
)
624 + gdbarch_num_pseudo_regs (gdbarch
),
625 SYMBOL_PRINT_NAME (sym
));
627 regno
= gdbarch_sp_regnum (gdbarch
); /* Known safe, though useless. */
633 static const struct symbol_register_ops stab_register_funcs
= {
637 /* The "aclass" indices for computed symbols. */
639 static int stab_register_index
;
640 static int stab_regparm_index
;
643 define_symbol (CORE_ADDR valu
, char *string
, int desc
, int type
,
644 struct objfile
*objfile
)
646 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
648 char *p
= (char *) find_name_end (string
);
652 char *new_name
= NULL
;
654 /* We would like to eliminate nameless symbols, but keep their types.
655 E.g. stab entry ":t10=*2" should produce a type 10, which is a pointer
656 to type 2, but, should not create a symbol to address that type. Since
657 the symbol will be nameless, there is no way any user can refer to it. */
661 /* Ignore syms with empty names. */
665 /* Ignore old-style symbols from cc -go. */
675 complaint (&symfile_complaints
,
676 _("Bad stabs string '%s'"), string
);
681 /* If a nameless stab entry, all we need is the type, not the symbol.
682 e.g. ":t10=*2" or a nameless enum like " :T16=ered:0,green:1,blue:2,;" */
683 nameless
= (p
== string
|| ((string
[0] == ' ') && (string
[1] == ':')));
685 current_symbol
= sym
= allocate_symbol (objfile
);
687 if (processing_gcc_compilation
)
689 /* GCC 2.x puts the line number in desc. SunOS apparently puts in the
690 number of bytes occupied by a type or object, which we ignore. */
691 SYMBOL_LINE (sym
) = desc
;
695 SYMBOL_LINE (sym
) = 0; /* unknown */
698 SYMBOL_SET_LANGUAGE (sym
, current_subfile
->language
,
699 &objfile
->objfile_obstack
);
701 if (is_cplus_marker (string
[0]))
703 /* Special GNU C++ names. */
707 SYMBOL_SET_LINKAGE_NAME (sym
, "this");
710 case 'v': /* $vtbl_ptr_type */
714 SYMBOL_SET_LINKAGE_NAME (sym
, "eh_throw");
718 /* This was an anonymous type that was never fixed up. */
722 /* SunPRO (3.0 at least) static variable encoding. */
723 if (gdbarch_static_transform_name_p (gdbarch
))
725 /* ... fall through ... */
728 complaint (&symfile_complaints
, _("Unknown C++ symbol name `%s'"),
730 goto normal
; /* Do *something* with it. */
736 if (SYMBOL_LANGUAGE (sym
) == language_cplus
)
738 char *name
= (char *) alloca (p
- string
+ 1);
740 memcpy (name
, string
, p
- string
);
741 name
[p
- string
] = '\0';
742 new_name
= cp_canonicalize_string (name
);
744 if (new_name
!= NULL
)
746 SYMBOL_SET_NAMES (sym
, new_name
, strlen (new_name
), 1, objfile
);
750 SYMBOL_SET_NAMES (sym
, string
, p
- string
, 1, objfile
);
752 if (SYMBOL_LANGUAGE (sym
) == language_cplus
)
753 cp_scan_for_anonymous_namespaces (sym
, objfile
);
758 /* Determine the type of name being defined. */
760 /* Getting GDB to correctly skip the symbol on an undefined symbol
761 descriptor and not ever dump core is a very dodgy proposition if
762 we do things this way. I say the acorn RISC machine can just
763 fix their compiler. */
764 /* The Acorn RISC machine's compiler can put out locals that don't
765 start with "234=" or "(3,4)=", so assume anything other than the
766 deftypes we know how to handle is a local. */
767 if (!strchr ("cfFGpPrStTvVXCR", *p
))
769 if (isdigit (*p
) || *p
== '(' || *p
== '-')
778 /* c is a special case, not followed by a type-number.
779 SYMBOL:c=iVALUE for an integer constant symbol.
780 SYMBOL:c=rVALUE for a floating constant symbol.
781 SYMBOL:c=eTYPE,INTVALUE for an enum constant symbol.
782 e.g. "b:c=e6,0" for "const b = blob1"
783 (where type 6 is defined by "blobs:t6=eblob1:0,blob2:1,;"). */
786 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST
;
787 SYMBOL_TYPE (sym
) = error_type (&p
, objfile
);
788 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
789 add_symbol_to_list (sym
, &file_symbols
);
799 struct type
*dbl_type
;
801 /* FIXME-if-picky-about-floating-accuracy: Should be using
802 target arithmetic to get the value. real.c in GCC
803 probably has the necessary code. */
805 dbl_type
= objfile_type (objfile
)->builtin_double
;
807 = (gdb_byte
*) obstack_alloc (&objfile
->objfile_obstack
,
808 TYPE_LENGTH (dbl_type
));
809 store_typed_floating (dbl_valu
, dbl_type
, d
);
811 SYMBOL_TYPE (sym
) = dbl_type
;
812 SYMBOL_VALUE_BYTES (sym
) = dbl_valu
;
813 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST_BYTES
;
818 /* Defining integer constants this way is kind of silly,
819 since 'e' constants allows the compiler to give not
820 only the value, but the type as well. C has at least
821 int, long, unsigned int, and long long as constant
822 types; other languages probably should have at least
823 unsigned as well as signed constants. */
825 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->builtin_long
;
826 SYMBOL_VALUE (sym
) = atoi (p
);
827 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST
;
833 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->builtin_char
;
834 SYMBOL_VALUE (sym
) = atoi (p
);
835 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST
;
841 struct type
*range_type
;
844 gdb_byte
*string_local
= (gdb_byte
*) alloca (strlen (p
));
845 gdb_byte
*string_value
;
847 if (quote
!= '\'' && quote
!= '"')
849 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST
;
850 SYMBOL_TYPE (sym
) = error_type (&p
, objfile
);
851 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
852 add_symbol_to_list (sym
, &file_symbols
);
856 /* Find matching quote, rejecting escaped quotes. */
857 while (*p
&& *p
!= quote
)
859 if (*p
== '\\' && p
[1] == quote
)
861 string_local
[ind
] = (gdb_byte
) quote
;
867 string_local
[ind
] = (gdb_byte
) (*p
);
874 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST
;
875 SYMBOL_TYPE (sym
) = error_type (&p
, objfile
);
876 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
877 add_symbol_to_list (sym
, &file_symbols
);
881 /* NULL terminate the string. */
882 string_local
[ind
] = 0;
884 = create_static_range_type (NULL
,
885 objfile_type (objfile
)->builtin_int
,
887 SYMBOL_TYPE (sym
) = create_array_type (NULL
,
888 objfile_type (objfile
)->builtin_char
,
891 = (gdb_byte
*) obstack_alloc (&objfile
->objfile_obstack
, ind
+ 1);
892 memcpy (string_value
, string_local
, ind
+ 1);
895 SYMBOL_VALUE_BYTES (sym
) = string_value
;
896 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST_BYTES
;
901 /* SYMBOL:c=eTYPE,INTVALUE for a constant symbol whose value
902 can be represented as integral.
903 e.g. "b:c=e6,0" for "const b = blob1"
904 (where type 6 is defined by "blobs:t6=eblob1:0,blob2:1,;"). */
906 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST
;
907 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
911 SYMBOL_TYPE (sym
) = error_type (&p
, objfile
);
916 /* If the value is too big to fit in an int (perhaps because
917 it is unsigned), or something like that, we silently get
918 a bogus value. The type and everything else about it is
919 correct. Ideally, we should be using whatever we have
920 available for parsing unsigned and long long values,
922 SYMBOL_VALUE (sym
) = atoi (p
);
927 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST
;
928 SYMBOL_TYPE (sym
) = error_type (&p
, objfile
);
931 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
932 add_symbol_to_list (sym
, &file_symbols
);
936 /* The name of a caught exception. */
937 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
938 SYMBOL_ACLASS_INDEX (sym
) = LOC_LABEL
;
939 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
940 SYMBOL_VALUE_ADDRESS (sym
) = valu
;
941 add_symbol_to_list (sym
, &local_symbols
);
945 /* A static function definition. */
946 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
947 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
948 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
949 add_symbol_to_list (sym
, &file_symbols
);
950 /* fall into process_function_types. */
952 process_function_types
:
953 /* Function result types are described as the result type in stabs.
954 We need to convert this to the function-returning-type-X type
955 in GDB. E.g. "int" is converted to "function returning int". */
956 if (TYPE_CODE (SYMBOL_TYPE (sym
)) != TYPE_CODE_FUNC
)
957 SYMBOL_TYPE (sym
) = lookup_function_type (SYMBOL_TYPE (sym
));
959 /* All functions in C++ have prototypes. Stabs does not offer an
960 explicit way to identify prototyped or unprototyped functions,
961 but both GCC and Sun CC emit stabs for the "call-as" type rather
962 than the "declared-as" type for unprototyped functions, so
963 we treat all functions as if they were prototyped. This is used
964 primarily for promotion when calling the function from GDB. */
965 TYPE_PROTOTYPED (SYMBOL_TYPE (sym
)) = 1;
967 /* fall into process_prototype_types. */
969 process_prototype_types
:
970 /* Sun acc puts declared types of arguments here. */
973 struct type
*ftype
= SYMBOL_TYPE (sym
);
978 /* Obtain a worst case guess for the number of arguments
979 by counting the semicolons. */
986 /* Allocate parameter information fields and fill them in. */
987 TYPE_FIELDS (ftype
) = (struct field
*)
988 TYPE_ALLOC (ftype
, nsemi
* sizeof (struct field
));
993 /* A type number of zero indicates the start of varargs.
994 FIXME: GDB currently ignores vararg functions. */
995 if (p
[0] == '0' && p
[1] == '\0')
997 ptype
= read_type (&p
, objfile
);
999 /* The Sun compilers mark integer arguments, which should
1000 be promoted to the width of the calling conventions, with
1001 a type which references itself. This type is turned into
1002 a TYPE_CODE_VOID type by read_type, and we have to turn
1003 it back into builtin_int here.
1004 FIXME: Do we need a new builtin_promoted_int_arg ? */
1005 if (TYPE_CODE (ptype
) == TYPE_CODE_VOID
)
1006 ptype
= objfile_type (objfile
)->builtin_int
;
1007 TYPE_FIELD_TYPE (ftype
, nparams
) = ptype
;
1008 TYPE_FIELD_ARTIFICIAL (ftype
, nparams
++) = 0;
1010 TYPE_NFIELDS (ftype
) = nparams
;
1011 TYPE_PROTOTYPED (ftype
) = 1;
1016 /* A global function definition. */
1017 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
1018 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
1019 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1020 add_symbol_to_list (sym
, &global_symbols
);
1021 goto process_function_types
;
1024 /* For a class G (global) symbol, it appears that the
1025 value is not correct. It is necessary to search for the
1026 corresponding linker definition to find the value.
1027 These definitions appear at the end of the namelist. */
1028 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
1029 SYMBOL_ACLASS_INDEX (sym
) = LOC_STATIC
;
1030 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1031 /* Don't add symbol references to global_sym_chain.
1032 Symbol references don't have valid names and wont't match up with
1033 minimal symbols when the global_sym_chain is relocated.
1034 We'll fixup symbol references when we fixup the defining symbol. */
1035 if (SYMBOL_LINKAGE_NAME (sym
) && SYMBOL_LINKAGE_NAME (sym
)[0] != '#')
1037 i
= hashname (SYMBOL_LINKAGE_NAME (sym
));
1038 SYMBOL_VALUE_CHAIN (sym
) = global_sym_chain
[i
];
1039 global_sym_chain
[i
] = sym
;
1041 add_symbol_to_list (sym
, &global_symbols
);
1044 /* This case is faked by a conditional above,
1045 when there is no code letter in the dbx data.
1046 Dbx data never actually contains 'l'. */
1049 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
1050 SYMBOL_ACLASS_INDEX (sym
) = LOC_LOCAL
;
1051 SYMBOL_VALUE (sym
) = valu
;
1052 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1053 add_symbol_to_list (sym
, &local_symbols
);
1058 /* pF is a two-letter code that means a function parameter in Fortran.
1059 The type-number specifies the type of the return value.
1060 Translate it into a pointer-to-function type. */
1064 = lookup_pointer_type
1065 (lookup_function_type (read_type (&p
, objfile
)));
1068 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
1070 SYMBOL_ACLASS_INDEX (sym
) = LOC_ARG
;
1071 SYMBOL_VALUE (sym
) = valu
;
1072 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1073 SYMBOL_IS_ARGUMENT (sym
) = 1;
1074 add_symbol_to_list (sym
, &local_symbols
);
1076 if (gdbarch_byte_order (gdbarch
) != BFD_ENDIAN_BIG
)
1078 /* On little-endian machines, this crud is never necessary,
1079 and, if the extra bytes contain garbage, is harmful. */
1083 /* If it's gcc-compiled, if it says `short', believe it. */
1084 if (processing_gcc_compilation
1085 || gdbarch_believe_pcc_promotion (gdbarch
))
1088 if (!gdbarch_believe_pcc_promotion (gdbarch
))
1090 /* If PCC says a parameter is a short or a char, it is
1092 if (TYPE_LENGTH (SYMBOL_TYPE (sym
))
1093 < gdbarch_int_bit (gdbarch
) / TARGET_CHAR_BIT
1094 && TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_INT
)
1097 TYPE_UNSIGNED (SYMBOL_TYPE (sym
))
1098 ? objfile_type (objfile
)->builtin_unsigned_int
1099 : objfile_type (objfile
)->builtin_int
;
1105 /* acc seems to use P to declare the prototypes of functions that
1106 are referenced by this file. gdb is not prepared to deal
1107 with this extra information. FIXME, it ought to. */
1110 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
1111 goto process_prototype_types
;
1116 /* Parameter which is in a register. */
1117 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
1118 SYMBOL_ACLASS_INDEX (sym
) = stab_register_index
;
1119 SYMBOL_IS_ARGUMENT (sym
) = 1;
1120 SYMBOL_VALUE (sym
) = valu
;
1121 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1122 add_symbol_to_list (sym
, &local_symbols
);
1126 /* Register variable (either global or local). */
1127 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
1128 SYMBOL_ACLASS_INDEX (sym
) = stab_register_index
;
1129 SYMBOL_VALUE (sym
) = valu
;
1130 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1131 if (within_function
)
1133 /* Sun cc uses a pair of symbols, one 'p' and one 'r', with
1134 the same name to represent an argument passed in a
1135 register. GCC uses 'P' for the same case. So if we find
1136 such a symbol pair we combine it into one 'P' symbol.
1137 For Sun cc we need to do this regardless of
1138 stabs_argument_has_addr, because the compiler puts out
1139 the 'p' symbol even if it never saves the argument onto
1142 On most machines, we want to preserve both symbols, so
1143 that we can still get information about what is going on
1144 with the stack (VAX for computing args_printed, using
1145 stack slots instead of saved registers in backtraces,
1148 Note that this code illegally combines
1149 main(argc) struct foo argc; { register struct foo argc; }
1150 but this case is considered pathological and causes a warning
1151 from a decent compiler. */
1154 && local_symbols
->nsyms
> 0
1155 && gdbarch_stabs_argument_has_addr (gdbarch
, SYMBOL_TYPE (sym
)))
1157 struct symbol
*prev_sym
;
1159 prev_sym
= local_symbols
->symbol
[local_symbols
->nsyms
- 1];
1160 if ((SYMBOL_CLASS (prev_sym
) == LOC_REF_ARG
1161 || SYMBOL_CLASS (prev_sym
) == LOC_ARG
)
1162 && strcmp (SYMBOL_LINKAGE_NAME (prev_sym
),
1163 SYMBOL_LINKAGE_NAME (sym
)) == 0)
1165 SYMBOL_ACLASS_INDEX (prev_sym
) = stab_register_index
;
1166 /* Use the type from the LOC_REGISTER; that is the type
1167 that is actually in that register. */
1168 SYMBOL_TYPE (prev_sym
) = SYMBOL_TYPE (sym
);
1169 SYMBOL_VALUE (prev_sym
) = SYMBOL_VALUE (sym
);
1174 add_symbol_to_list (sym
, &local_symbols
);
1177 add_symbol_to_list (sym
, &file_symbols
);
1181 /* Static symbol at top level of file. */
1182 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
1183 SYMBOL_ACLASS_INDEX (sym
) = LOC_STATIC
;
1184 SYMBOL_VALUE_ADDRESS (sym
) = valu
;
1185 if (gdbarch_static_transform_name_p (gdbarch
)
1186 && gdbarch_static_transform_name (gdbarch
,
1187 SYMBOL_LINKAGE_NAME (sym
))
1188 != SYMBOL_LINKAGE_NAME (sym
))
1190 struct bound_minimal_symbol msym
;
1192 msym
= lookup_minimal_symbol (SYMBOL_LINKAGE_NAME (sym
),
1194 if (msym
.minsym
!= NULL
)
1196 const char *new_name
= gdbarch_static_transform_name
1197 (gdbarch
, SYMBOL_LINKAGE_NAME (sym
));
1199 SYMBOL_SET_LINKAGE_NAME (sym
, new_name
);
1200 SYMBOL_VALUE_ADDRESS (sym
) = BMSYMBOL_VALUE_ADDRESS (msym
);
1203 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1204 add_symbol_to_list (sym
, &file_symbols
);
1208 /* In Ada, there is no distinction between typedef and non-typedef;
1209 any type declaration implicitly has the equivalent of a typedef,
1210 and thus 't' is in fact equivalent to 'Tt'.
1212 Therefore, for Ada units, we check the character immediately
1213 before the 't', and if we do not find a 'T', then make sure to
1214 create the associated symbol in the STRUCT_DOMAIN ('t' definitions
1215 will be stored in the VAR_DOMAIN). If the symbol was indeed
1216 defined as 'Tt' then the STRUCT_DOMAIN symbol will be created
1217 elsewhere, so we don't need to take care of that.
1219 This is important to do, because of forward references:
1220 The cleanup of undefined types stored in undef_types only uses
1221 STRUCT_DOMAIN symbols to perform the replacement. */
1222 synonym
= (SYMBOL_LANGUAGE (sym
) == language_ada
&& p
[-2] != 'T');
1225 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
1227 /* For a nameless type, we don't want a create a symbol, thus we
1228 did not use `sym'. Return without further processing. */
1232 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
1233 SYMBOL_VALUE (sym
) = valu
;
1234 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1235 /* C++ vagaries: we may have a type which is derived from
1236 a base type which did not have its name defined when the
1237 derived class was output. We fill in the derived class's
1238 base part member's name here in that case. */
1239 if (TYPE_NAME (SYMBOL_TYPE (sym
)) != NULL
)
1240 if ((TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_STRUCT
1241 || TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_UNION
)
1242 && TYPE_N_BASECLASSES (SYMBOL_TYPE (sym
)))
1246 for (j
= TYPE_N_BASECLASSES (SYMBOL_TYPE (sym
)) - 1; j
>= 0; j
--)
1247 if (TYPE_BASECLASS_NAME (SYMBOL_TYPE (sym
), j
) == 0)
1248 TYPE_BASECLASS_NAME (SYMBOL_TYPE (sym
), j
) =
1249 type_name_no_tag (TYPE_BASECLASS (SYMBOL_TYPE (sym
), j
));
1252 if (TYPE_NAME (SYMBOL_TYPE (sym
)) == NULL
)
1254 /* gcc-2.6 or later (when using -fvtable-thunks)
1255 emits a unique named type for a vtable entry.
1256 Some gdb code depends on that specific name. */
1257 extern const char vtbl_ptr_name
[];
1259 if ((TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_PTR
1260 && strcmp (SYMBOL_LINKAGE_NAME (sym
), vtbl_ptr_name
))
1261 || TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_FUNC
)
1263 /* If we are giving a name to a type such as "pointer to
1264 foo" or "function returning foo", we better not set
1265 the TYPE_NAME. If the program contains "typedef char
1266 *caddr_t;", we don't want all variables of type char
1267 * to print as caddr_t. This is not just a
1268 consequence of GDB's type management; PCC and GCC (at
1269 least through version 2.4) both output variables of
1270 either type char * or caddr_t with the type number
1271 defined in the 't' symbol for caddr_t. If a future
1272 compiler cleans this up it GDB is not ready for it
1273 yet, but if it becomes ready we somehow need to
1274 disable this check (without breaking the PCC/GCC2.4
1279 Fortunately, this check seems not to be necessary
1280 for anything except pointers or functions. */
1281 /* ezannoni: 2000-10-26. This seems to apply for
1282 versions of gcc older than 2.8. This was the original
1283 problem: with the following code gdb would tell that
1284 the type for name1 is caddr_t, and func is char().
1286 typedef char *caddr_t;
1298 /* Pascal accepts names for pointer types. */
1299 if (current_subfile
->language
== language_pascal
)
1301 TYPE_NAME (SYMBOL_TYPE (sym
)) = SYMBOL_LINKAGE_NAME (sym
);
1305 TYPE_NAME (SYMBOL_TYPE (sym
)) = SYMBOL_LINKAGE_NAME (sym
);
1308 add_symbol_to_list (sym
, &file_symbols
);
1312 /* Create the STRUCT_DOMAIN clone. */
1313 struct symbol
*struct_sym
= allocate_symbol (objfile
);
1316 SYMBOL_ACLASS_INDEX (struct_sym
) = LOC_TYPEDEF
;
1317 SYMBOL_VALUE (struct_sym
) = valu
;
1318 SYMBOL_DOMAIN (struct_sym
) = STRUCT_DOMAIN
;
1319 if (TYPE_NAME (SYMBOL_TYPE (sym
)) == 0)
1320 TYPE_NAME (SYMBOL_TYPE (sym
))
1321 = obconcat (&objfile
->objfile_obstack
,
1322 SYMBOL_LINKAGE_NAME (sym
),
1324 add_symbol_to_list (struct_sym
, &file_symbols
);
1330 /* Struct, union, or enum tag. For GNU C++, this can be be followed
1331 by 't' which means we are typedef'ing it as well. */
1332 synonym
= *p
== 't';
1337 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
1339 /* For a nameless type, we don't want a create a symbol, thus we
1340 did not use `sym'. Return without further processing. */
1344 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
1345 SYMBOL_VALUE (sym
) = valu
;
1346 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
1347 if (TYPE_TAG_NAME (SYMBOL_TYPE (sym
)) == 0)
1348 TYPE_TAG_NAME (SYMBOL_TYPE (sym
))
1349 = obconcat (&objfile
->objfile_obstack
,
1350 SYMBOL_LINKAGE_NAME (sym
),
1352 add_symbol_to_list (sym
, &file_symbols
);
1356 /* Clone the sym and then modify it. */
1357 struct symbol
*typedef_sym
= allocate_symbol (objfile
);
1359 *typedef_sym
= *sym
;
1360 SYMBOL_ACLASS_INDEX (typedef_sym
) = LOC_TYPEDEF
;
1361 SYMBOL_VALUE (typedef_sym
) = valu
;
1362 SYMBOL_DOMAIN (typedef_sym
) = VAR_DOMAIN
;
1363 if (TYPE_NAME (SYMBOL_TYPE (sym
)) == 0)
1364 TYPE_NAME (SYMBOL_TYPE (sym
))
1365 = obconcat (&objfile
->objfile_obstack
,
1366 SYMBOL_LINKAGE_NAME (sym
),
1368 add_symbol_to_list (typedef_sym
, &file_symbols
);
1373 /* Static symbol of local scope. */
1374 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
1375 SYMBOL_ACLASS_INDEX (sym
) = LOC_STATIC
;
1376 SYMBOL_VALUE_ADDRESS (sym
) = valu
;
1377 if (gdbarch_static_transform_name_p (gdbarch
)
1378 && gdbarch_static_transform_name (gdbarch
,
1379 SYMBOL_LINKAGE_NAME (sym
))
1380 != SYMBOL_LINKAGE_NAME (sym
))
1382 struct bound_minimal_symbol msym
;
1384 msym
= lookup_minimal_symbol (SYMBOL_LINKAGE_NAME (sym
),
1386 if (msym
.minsym
!= NULL
)
1388 const char *new_name
= gdbarch_static_transform_name
1389 (gdbarch
, SYMBOL_LINKAGE_NAME (sym
));
1391 SYMBOL_SET_LINKAGE_NAME (sym
, new_name
);
1392 SYMBOL_VALUE_ADDRESS (sym
) = BMSYMBOL_VALUE_ADDRESS (msym
);
1395 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1396 add_symbol_to_list (sym
, &local_symbols
);
1400 /* Reference parameter */
1401 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
1402 SYMBOL_ACLASS_INDEX (sym
) = LOC_REF_ARG
;
1403 SYMBOL_IS_ARGUMENT (sym
) = 1;
1404 SYMBOL_VALUE (sym
) = valu
;
1405 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1406 add_symbol_to_list (sym
, &local_symbols
);
1410 /* Reference parameter which is in a register. */
1411 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
1412 SYMBOL_ACLASS_INDEX (sym
) = stab_regparm_index
;
1413 SYMBOL_IS_ARGUMENT (sym
) = 1;
1414 SYMBOL_VALUE (sym
) = valu
;
1415 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1416 add_symbol_to_list (sym
, &local_symbols
);
1420 /* This is used by Sun FORTRAN for "function result value".
1421 Sun claims ("dbx and dbxtool interfaces", 2nd ed)
1422 that Pascal uses it too, but when I tried it Pascal used
1423 "x:3" (local symbol) instead. */
1424 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
1425 SYMBOL_ACLASS_INDEX (sym
) = LOC_LOCAL
;
1426 SYMBOL_VALUE (sym
) = valu
;
1427 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1428 add_symbol_to_list (sym
, &local_symbols
);
1432 SYMBOL_TYPE (sym
) = error_type (&p
, objfile
);
1433 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST
;
1434 SYMBOL_VALUE (sym
) = 0;
1435 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1436 add_symbol_to_list (sym
, &file_symbols
);
1440 /* Some systems pass variables of certain types by reference instead
1441 of by value, i.e. they will pass the address of a structure (in a
1442 register or on the stack) instead of the structure itself. */
1444 if (gdbarch_stabs_argument_has_addr (gdbarch
, SYMBOL_TYPE (sym
))
1445 && SYMBOL_IS_ARGUMENT (sym
))
1447 /* We have to convert LOC_REGISTER to LOC_REGPARM_ADDR (for
1448 variables passed in a register). */
1449 if (SYMBOL_CLASS (sym
) == LOC_REGISTER
)
1450 SYMBOL_ACLASS_INDEX (sym
) = LOC_REGPARM_ADDR
;
1451 /* Likewise for converting LOC_ARG to LOC_REF_ARG (for the 7th
1452 and subsequent arguments on SPARC, for example). */
1453 else if (SYMBOL_CLASS (sym
) == LOC_ARG
)
1454 SYMBOL_ACLASS_INDEX (sym
) = LOC_REF_ARG
;
1460 /* Skip rest of this symbol and return an error type.
1462 General notes on error recovery: error_type always skips to the
1463 end of the symbol (modulo cretinous dbx symbol name continuation).
1464 Thus code like this:
1466 if (*(*pp)++ != ';')
1467 return error_type (pp, objfile);
1469 is wrong because if *pp starts out pointing at '\0' (typically as the
1470 result of an earlier error), it will be incremented to point to the
1471 start of the next symbol, which might produce strange results, at least
1472 if you run off the end of the string table. Instead use
1475 return error_type (pp, objfile);
1481 foo = error_type (pp, objfile);
1485 And in case it isn't obvious, the point of all this hair is so the compiler
1486 can define new types and new syntaxes, and old versions of the
1487 debugger will be able to read the new symbol tables. */
1489 static struct type
*
1490 error_type (char **pp
, struct objfile
*objfile
)
1492 complaint (&symfile_complaints
,
1493 _("couldn't parse type; debugger out of date?"));
1496 /* Skip to end of symbol. */
1497 while (**pp
!= '\0')
1502 /* Check for and handle cretinous dbx symbol name continuation! */
1503 if ((*pp
)[-1] == '\\' || (*pp
)[-1] == '?')
1505 *pp
= next_symbol_text (objfile
);
1512 return objfile_type (objfile
)->builtin_error
;
1516 /* Read type information or a type definition; return the type. Even
1517 though this routine accepts either type information or a type
1518 definition, the distinction is relevant--some parts of stabsread.c
1519 assume that type information starts with a digit, '-', or '(' in
1520 deciding whether to call read_type. */
1522 static struct type
*
1523 read_type (char **pp
, struct objfile
*objfile
)
1525 struct type
*type
= 0;
1528 char type_descriptor
;
1530 /* Size in bits of type if specified by a type attribute, or -1 if
1531 there is no size attribute. */
1534 /* Used to distinguish string and bitstring from char-array and set. */
1537 /* Used to distinguish vector from array. */
1540 /* Read type number if present. The type number may be omitted.
1541 for instance in a two-dimensional array declared with type
1542 "ar1;1;10;ar1;1;10;4". */
1543 if ((**pp
>= '0' && **pp
<= '9')
1547 if (read_type_number (pp
, typenums
) != 0)
1548 return error_type (pp
, objfile
);
1552 /* Type is not being defined here. Either it already
1553 exists, or this is a forward reference to it.
1554 dbx_alloc_type handles both cases. */
1555 type
= dbx_alloc_type (typenums
, objfile
);
1557 /* If this is a forward reference, arrange to complain if it
1558 doesn't get patched up by the time we're done
1560 if (TYPE_CODE (type
) == TYPE_CODE_UNDEF
)
1561 add_undefined_type (type
, typenums
);
1566 /* Type is being defined here. */
1568 Also skip the type descriptor - we get it below with (*pp)[-1]. */
1573 /* 'typenums=' not present, type is anonymous. Read and return
1574 the definition, but don't put it in the type vector. */
1575 typenums
[0] = typenums
[1] = -1;
1580 type_descriptor
= (*pp
)[-1];
1581 switch (type_descriptor
)
1585 enum type_code code
;
1587 /* Used to index through file_symbols. */
1588 struct pending
*ppt
;
1591 /* Name including "struct", etc. */
1595 char *from
, *to
, *p
, *q1
, *q2
;
1597 /* Set the type code according to the following letter. */
1601 code
= TYPE_CODE_STRUCT
;
1604 code
= TYPE_CODE_UNION
;
1607 code
= TYPE_CODE_ENUM
;
1611 /* Complain and keep going, so compilers can invent new
1612 cross-reference types. */
1613 complaint (&symfile_complaints
,
1614 _("Unrecognized cross-reference type `%c'"),
1616 code
= TYPE_CODE_STRUCT
;
1621 q1
= strchr (*pp
, '<');
1622 p
= strchr (*pp
, ':');
1624 return error_type (pp
, objfile
);
1625 if (q1
&& p
> q1
&& p
[1] == ':')
1627 int nesting_level
= 0;
1629 for (q2
= q1
; *q2
; q2
++)
1633 else if (*q2
== '>')
1635 else if (*q2
== ':' && nesting_level
== 0)
1640 return error_type (pp
, objfile
);
1643 if (current_subfile
->language
== language_cplus
)
1645 char *new_name
, *name
= (char *) alloca (p
- *pp
+ 1);
1647 memcpy (name
, *pp
, p
- *pp
);
1648 name
[p
- *pp
] = '\0';
1649 new_name
= cp_canonicalize_string (name
);
1650 if (new_name
!= NULL
)
1653 = (char *) obstack_copy0 (&objfile
->objfile_obstack
,
1654 new_name
, strlen (new_name
));
1658 if (type_name
== NULL
)
1660 to
= type_name
= (char *)
1661 obstack_alloc (&objfile
->objfile_obstack
, p
- *pp
+ 1);
1663 /* Copy the name. */
1670 /* Set the pointer ahead of the name which we just read, and
1675 /* If this type has already been declared, then reuse the same
1676 type, rather than allocating a new one. This saves some
1679 for (ppt
= file_symbols
; ppt
; ppt
= ppt
->next
)
1680 for (i
= 0; i
< ppt
->nsyms
; i
++)
1682 struct symbol
*sym
= ppt
->symbol
[i
];
1684 if (SYMBOL_CLASS (sym
) == LOC_TYPEDEF
1685 && SYMBOL_DOMAIN (sym
) == STRUCT_DOMAIN
1686 && (TYPE_CODE (SYMBOL_TYPE (sym
)) == code
)
1687 && strcmp (SYMBOL_LINKAGE_NAME (sym
), type_name
) == 0)
1689 obstack_free (&objfile
->objfile_obstack
, type_name
);
1690 type
= SYMBOL_TYPE (sym
);
1691 if (typenums
[0] != -1)
1692 *dbx_lookup_type (typenums
, objfile
) = type
;
1697 /* Didn't find the type to which this refers, so we must
1698 be dealing with a forward reference. Allocate a type
1699 structure for it, and keep track of it so we can
1700 fill in the rest of the fields when we get the full
1702 type
= dbx_alloc_type (typenums
, objfile
);
1703 TYPE_CODE (type
) = code
;
1704 TYPE_TAG_NAME (type
) = type_name
;
1705 INIT_CPLUS_SPECIFIC (type
);
1706 TYPE_STUB (type
) = 1;
1708 add_undefined_type (type
, typenums
);
1712 case '-': /* RS/6000 built-in type */
1726 /* We deal with something like t(1,2)=(3,4)=... which
1727 the Lucid compiler and recent gcc versions (post 2.7.3) use. */
1729 /* Allocate and enter the typedef type first.
1730 This handles recursive types. */
1731 type
= dbx_alloc_type (typenums
, objfile
);
1732 TYPE_CODE (type
) = TYPE_CODE_TYPEDEF
;
1734 struct type
*xtype
= read_type (pp
, objfile
);
1738 /* It's being defined as itself. That means it is "void". */
1739 TYPE_CODE (type
) = TYPE_CODE_VOID
;
1740 TYPE_LENGTH (type
) = 1;
1742 else if (type_size
>= 0 || is_string
)
1744 /* This is the absolute wrong way to construct types. Every
1745 other debug format has found a way around this problem and
1746 the related problems with unnecessarily stubbed types;
1747 someone motivated should attempt to clean up the issue
1748 here as well. Once a type pointed to has been created it
1749 should not be modified.
1751 Well, it's not *absolutely* wrong. Constructing recursive
1752 types (trees, linked lists) necessarily entails modifying
1753 types after creating them. Constructing any loop structure
1754 entails side effects. The Dwarf 2 reader does handle this
1755 more gracefully (it never constructs more than once
1756 instance of a type object, so it doesn't have to copy type
1757 objects wholesale), but it still mutates type objects after
1758 other folks have references to them.
1760 Keep in mind that this circularity/mutation issue shows up
1761 at the source language level, too: C's "incomplete types",
1762 for example. So the proper cleanup, I think, would be to
1763 limit GDB's type smashing to match exactly those required
1764 by the source language. So GDB could have a
1765 "complete_this_type" function, but never create unnecessary
1766 copies of a type otherwise. */
1767 replace_type (type
, xtype
);
1768 TYPE_NAME (type
) = NULL
;
1769 TYPE_TAG_NAME (type
) = NULL
;
1773 TYPE_TARGET_STUB (type
) = 1;
1774 TYPE_TARGET_TYPE (type
) = xtype
;
1779 /* In the following types, we must be sure to overwrite any existing
1780 type that the typenums refer to, rather than allocating a new one
1781 and making the typenums point to the new one. This is because there
1782 may already be pointers to the existing type (if it had been
1783 forward-referenced), and we must change it to a pointer, function,
1784 reference, or whatever, *in-place*. */
1786 case '*': /* Pointer to another type */
1787 type1
= read_type (pp
, objfile
);
1788 type
= make_pointer_type (type1
, dbx_lookup_type (typenums
, objfile
));
1791 case '&': /* Reference to another type */
1792 type1
= read_type (pp
, objfile
);
1793 type
= make_reference_type (type1
, dbx_lookup_type (typenums
, objfile
));
1796 case 'f': /* Function returning another type */
1797 type1
= read_type (pp
, objfile
);
1798 type
= make_function_type (type1
, dbx_lookup_type (typenums
, objfile
));
1801 case 'g': /* Prototyped function. (Sun) */
1803 /* Unresolved questions:
1805 - According to Sun's ``STABS Interface Manual'', for 'f'
1806 and 'F' symbol descriptors, a `0' in the argument type list
1807 indicates a varargs function. But it doesn't say how 'g'
1808 type descriptors represent that info. Someone with access
1809 to Sun's toolchain should try it out.
1811 - According to the comment in define_symbol (search for
1812 `process_prototype_types:'), Sun emits integer arguments as
1813 types which ref themselves --- like `void' types. Do we
1814 have to deal with that here, too? Again, someone with
1815 access to Sun's toolchain should try it out and let us
1818 const char *type_start
= (*pp
) - 1;
1819 struct type
*return_type
= read_type (pp
, objfile
);
1820 struct type
*func_type
1821 = make_function_type (return_type
,
1822 dbx_lookup_type (typenums
, objfile
));
1825 struct type_list
*next
;
1829 while (**pp
&& **pp
!= '#')
1831 struct type
*arg_type
= read_type (pp
, objfile
);
1832 struct type_list
*newobj
= XALLOCA (struct type_list
);
1833 newobj
->type
= arg_type
;
1834 newobj
->next
= arg_types
;
1842 complaint (&symfile_complaints
,
1843 _("Prototyped function type didn't "
1844 "end arguments with `#':\n%s"),
1848 /* If there is just one argument whose type is `void', then
1849 that's just an empty argument list. */
1851 && ! arg_types
->next
1852 && TYPE_CODE (arg_types
->type
) == TYPE_CODE_VOID
)
1855 TYPE_FIELDS (func_type
)
1856 = (struct field
*) TYPE_ALLOC (func_type
,
1857 num_args
* sizeof (struct field
));
1858 memset (TYPE_FIELDS (func_type
), 0, num_args
* sizeof (struct field
));
1861 struct type_list
*t
;
1863 /* We stuck each argument type onto the front of the list
1864 when we read it, so the list is reversed. Build the
1865 fields array right-to-left. */
1866 for (t
= arg_types
, i
= num_args
- 1; t
; t
= t
->next
, i
--)
1867 TYPE_FIELD_TYPE (func_type
, i
) = t
->type
;
1869 TYPE_NFIELDS (func_type
) = num_args
;
1870 TYPE_PROTOTYPED (func_type
) = 1;
1876 case 'k': /* Const qualifier on some type (Sun) */
1877 type
= read_type (pp
, objfile
);
1878 type
= make_cv_type (1, TYPE_VOLATILE (type
), type
,
1879 dbx_lookup_type (typenums
, objfile
));
1882 case 'B': /* Volatile qual on some type (Sun) */
1883 type
= read_type (pp
, objfile
);
1884 type
= make_cv_type (TYPE_CONST (type
), 1, type
,
1885 dbx_lookup_type (typenums
, objfile
));
1889 if (isdigit (**pp
) || **pp
== '(' || **pp
== '-')
1890 { /* Member (class & variable) type */
1891 /* FIXME -- we should be doing smash_to_XXX types here. */
1893 struct type
*domain
= read_type (pp
, objfile
);
1894 struct type
*memtype
;
1897 /* Invalid member type data format. */
1898 return error_type (pp
, objfile
);
1901 memtype
= read_type (pp
, objfile
);
1902 type
= dbx_alloc_type (typenums
, objfile
);
1903 smash_to_memberptr_type (type
, domain
, memtype
);
1906 /* type attribute */
1910 /* Skip to the semicolon. */
1911 while (**pp
!= ';' && **pp
!= '\0')
1914 return error_type (pp
, objfile
);
1916 ++ * pp
; /* Skip the semicolon. */
1920 case 's': /* Size attribute */
1921 type_size
= atoi (attr
+ 1);
1926 case 'S': /* String attribute */
1927 /* FIXME: check to see if following type is array? */
1931 case 'V': /* Vector attribute */
1932 /* FIXME: check to see if following type is array? */
1937 /* Ignore unrecognized type attributes, so future compilers
1938 can invent new ones. */
1946 case '#': /* Method (class & fn) type */
1947 if ((*pp
)[0] == '#')
1949 /* We'll get the parameter types from the name. */
1950 struct type
*return_type
;
1953 return_type
= read_type (pp
, objfile
);
1954 if (*(*pp
)++ != ';')
1955 complaint (&symfile_complaints
,
1956 _("invalid (minimal) member type "
1957 "data format at symtab pos %d."),
1959 type
= allocate_stub_method (return_type
);
1960 if (typenums
[0] != -1)
1961 *dbx_lookup_type (typenums
, objfile
) = type
;
1965 struct type
*domain
= read_type (pp
, objfile
);
1966 struct type
*return_type
;
1971 /* Invalid member type data format. */
1972 return error_type (pp
, objfile
);
1976 return_type
= read_type (pp
, objfile
);
1977 args
= read_args (pp
, ';', objfile
, &nargs
, &varargs
);
1979 return error_type (pp
, objfile
);
1980 type
= dbx_alloc_type (typenums
, objfile
);
1981 smash_to_method_type (type
, domain
, return_type
, args
,
1986 case 'r': /* Range type */
1987 type
= read_range_type (pp
, typenums
, type_size
, objfile
);
1988 if (typenums
[0] != -1)
1989 *dbx_lookup_type (typenums
, objfile
) = type
;
1994 /* Sun ACC builtin int type */
1995 type
= read_sun_builtin_type (pp
, typenums
, objfile
);
1996 if (typenums
[0] != -1)
1997 *dbx_lookup_type (typenums
, objfile
) = type
;
2001 case 'R': /* Sun ACC builtin float type */
2002 type
= read_sun_floating_type (pp
, typenums
, objfile
);
2003 if (typenums
[0] != -1)
2004 *dbx_lookup_type (typenums
, objfile
) = type
;
2007 case 'e': /* Enumeration type */
2008 type
= dbx_alloc_type (typenums
, objfile
);
2009 type
= read_enum_type (pp
, type
, objfile
);
2010 if (typenums
[0] != -1)
2011 *dbx_lookup_type (typenums
, objfile
) = type
;
2014 case 's': /* Struct type */
2015 case 'u': /* Union type */
2017 enum type_code type_code
= TYPE_CODE_UNDEF
;
2018 type
= dbx_alloc_type (typenums
, objfile
);
2019 switch (type_descriptor
)
2022 type_code
= TYPE_CODE_STRUCT
;
2025 type_code
= TYPE_CODE_UNION
;
2028 type
= read_struct_type (pp
, type
, type_code
, objfile
);
2032 case 'a': /* Array type */
2034 return error_type (pp
, objfile
);
2037 type
= dbx_alloc_type (typenums
, objfile
);
2038 type
= read_array_type (pp
, type
, objfile
);
2040 TYPE_CODE (type
) = TYPE_CODE_STRING
;
2042 make_vector_type (type
);
2045 case 'S': /* Set type */
2046 type1
= read_type (pp
, objfile
);
2047 type
= create_set_type ((struct type
*) NULL
, type1
);
2048 if (typenums
[0] != -1)
2049 *dbx_lookup_type (typenums
, objfile
) = type
;
2053 --*pp
; /* Go back to the symbol in error. */
2054 /* Particularly important if it was \0! */
2055 return error_type (pp
, objfile
);
2060 warning (_("GDB internal error, type is NULL in stabsread.c."));
2061 return error_type (pp
, objfile
);
2064 /* Size specified in a type attribute overrides any other size. */
2065 if (type_size
!= -1)
2066 TYPE_LENGTH (type
) = (type_size
+ TARGET_CHAR_BIT
- 1) / TARGET_CHAR_BIT
;
2071 /* RS/6000 xlc/dbx combination uses a set of builtin types, starting from -1.
2072 Return the proper type node for a given builtin type number. */
2074 static const struct objfile_data
*rs6000_builtin_type_data
;
2076 static struct type
*
2077 rs6000_builtin_type (int typenum
, struct objfile
*objfile
)
2079 struct type
**negative_types
2080 = (struct type
**) objfile_data (objfile
, rs6000_builtin_type_data
);
2082 /* We recognize types numbered from -NUMBER_RECOGNIZED to -1. */
2083 #define NUMBER_RECOGNIZED 34
2084 struct type
*rettype
= NULL
;
2086 if (typenum
>= 0 || typenum
< -NUMBER_RECOGNIZED
)
2088 complaint (&symfile_complaints
, _("Unknown builtin type %d"), typenum
);
2089 return objfile_type (objfile
)->builtin_error
;
2092 if (!negative_types
)
2094 /* This includes an empty slot for type number -0. */
2095 negative_types
= OBSTACK_CALLOC (&objfile
->objfile_obstack
,
2096 NUMBER_RECOGNIZED
+ 1, struct type
*);
2097 set_objfile_data (objfile
, rs6000_builtin_type_data
, negative_types
);
2100 if (negative_types
[-typenum
] != NULL
)
2101 return negative_types
[-typenum
];
2103 #if TARGET_CHAR_BIT != 8
2104 #error This code wrong for TARGET_CHAR_BIT not 8
2105 /* These definitions all assume that TARGET_CHAR_BIT is 8. I think
2106 that if that ever becomes not true, the correct fix will be to
2107 make the size in the struct type to be in bits, not in units of
2114 /* The size of this and all the other types are fixed, defined
2115 by the debugging format. If there is a type called "int" which
2116 is other than 32 bits, then it should use a new negative type
2117 number (or avoid negative type numbers for that case).
2118 See stabs.texinfo. */
2119 rettype
= init_integer_type (objfile
, 32, 0, "int");
2122 rettype
= init_integer_type (objfile
, 8, 0, "char");
2123 TYPE_NOSIGN (rettype
) = 1;
2126 rettype
= init_integer_type (objfile
, 16, 0, "short");
2129 rettype
= init_integer_type (objfile
, 32, 0, "long");
2132 rettype
= init_integer_type (objfile
, 8, 1, "unsigned char");
2135 rettype
= init_integer_type (objfile
, 8, 0, "signed char");
2138 rettype
= init_integer_type (objfile
, 16, 1, "unsigned short");
2141 rettype
= init_integer_type (objfile
, 32, 1, "unsigned int");
2144 rettype
= init_integer_type (objfile
, 32, 1, "unsigned");
2147 rettype
= init_integer_type (objfile
, 32, 1, "unsigned long");
2150 rettype
= init_type (objfile
, TYPE_CODE_VOID
, 1, "void");
2153 /* IEEE single precision (32 bit). */
2154 rettype
= init_float_type (objfile
, 32, "float",
2155 floatformats_ieee_single
);
2158 /* IEEE double precision (64 bit). */
2159 rettype
= init_float_type (objfile
, 64, "double",
2160 floatformats_ieee_double
);
2163 /* This is an IEEE double on the RS/6000, and different machines with
2164 different sizes for "long double" should use different negative
2165 type numbers. See stabs.texinfo. */
2166 rettype
= init_float_type (objfile
, 64, "long double",
2167 floatformats_ieee_double
);
2170 rettype
= init_integer_type (objfile
, 32, 0, "integer");
2173 rettype
= init_boolean_type (objfile
, 32, 1, "boolean");
2176 rettype
= init_float_type (objfile
, 32, "short real",
2177 floatformats_ieee_single
);
2180 rettype
= init_float_type (objfile
, 64, "real",
2181 floatformats_ieee_double
);
2184 rettype
= init_type (objfile
, TYPE_CODE_ERROR
, 0, "stringptr");
2187 rettype
= init_character_type (objfile
, 8, 1, "character");
2190 rettype
= init_boolean_type (objfile
, 8, 1, "logical*1");
2193 rettype
= init_boolean_type (objfile
, 16, 1, "logical*2");
2196 rettype
= init_boolean_type (objfile
, 32, 1, "logical*4");
2199 rettype
= init_boolean_type (objfile
, 32, 1, "logical");
2202 /* Complex type consisting of two IEEE single precision values. */
2203 rettype
= init_complex_type (objfile
, "complex",
2204 rs6000_builtin_type (12, objfile
));
2207 /* Complex type consisting of two IEEE double precision values. */
2208 rettype
= init_complex_type (objfile
, "double complex",
2209 rs6000_builtin_type (13, objfile
));
2212 rettype
= init_integer_type (objfile
, 8, 0, "integer*1");
2215 rettype
= init_integer_type (objfile
, 16, 0, "integer*2");
2218 rettype
= init_integer_type (objfile
, 32, 0, "integer*4");
2221 rettype
= init_character_type (objfile
, 16, 0, "wchar");
2224 rettype
= init_integer_type (objfile
, 64, 0, "long long");
2227 rettype
= init_integer_type (objfile
, 64, 1, "unsigned long long");
2230 rettype
= init_integer_type (objfile
, 64, 1, "logical*8");
2233 rettype
= init_integer_type (objfile
, 64, 0, "integer*8");
2236 negative_types
[-typenum
] = rettype
;
2240 /* This page contains subroutines of read_type. */
2242 /* Wrapper around method_name_from_physname to flag a complaint
2243 if there is an error. */
2246 stabs_method_name_from_physname (const char *physname
)
2250 method_name
= method_name_from_physname (physname
);
2252 if (method_name
== NULL
)
2254 complaint (&symfile_complaints
,
2255 _("Method has bad physname %s\n"), physname
);
2262 /* Read member function stabs info for C++ classes. The form of each member
2265 NAME :: TYPENUM[=type definition] ARGS : PHYSNAME ;
2267 An example with two member functions is:
2269 afunc1::20=##15;:i;2A.;afunc2::20:i;2A.;
2271 For the case of overloaded operators, the format is op$::*.funcs, where
2272 $ is the CPLUS_MARKER (usually '$'), `*' holds the place for an operator
2273 name (such as `+=') and `.' marks the end of the operator name.
2275 Returns 1 for success, 0 for failure. */
2278 read_member_functions (struct field_info
*fip
, char **pp
, struct type
*type
,
2279 struct objfile
*objfile
)
2286 struct next_fnfield
*next
;
2287 struct fn_field fn_field
;
2290 struct type
*look_ahead_type
;
2291 struct next_fnfieldlist
*new_fnlist
;
2292 struct next_fnfield
*new_sublist
;
2296 /* Process each list until we find something that is not a member function
2297 or find the end of the functions. */
2301 /* We should be positioned at the start of the function name.
2302 Scan forward to find the first ':' and if it is not the
2303 first of a "::" delimiter, then this is not a member function. */
2315 look_ahead_type
= NULL
;
2318 new_fnlist
= XCNEW (struct next_fnfieldlist
);
2319 make_cleanup (xfree
, new_fnlist
);
2321 if ((*pp
)[0] == 'o' && (*pp
)[1] == 'p' && is_cplus_marker ((*pp
)[2]))
2323 /* This is a completely wierd case. In order to stuff in the
2324 names that might contain colons (the usual name delimiter),
2325 Mike Tiemann defined a different name format which is
2326 signalled if the identifier is "op$". In that case, the
2327 format is "op$::XXXX." where XXXX is the name. This is
2328 used for names like "+" or "=". YUUUUUUUK! FIXME! */
2329 /* This lets the user type "break operator+".
2330 We could just put in "+" as the name, but that wouldn't
2332 static char opname
[32] = "op$";
2333 char *o
= opname
+ 3;
2335 /* Skip past '::'. */
2338 STABS_CONTINUE (pp
, objfile
);
2344 main_fn_name
= savestring (opname
, o
- opname
);
2350 main_fn_name
= savestring (*pp
, p
- *pp
);
2351 /* Skip past '::'. */
2354 new_fnlist
->fn_fieldlist
.name
= main_fn_name
;
2358 new_sublist
= XCNEW (struct next_fnfield
);
2359 make_cleanup (xfree
, new_sublist
);
2361 /* Check for and handle cretinous dbx symbol name continuation! */
2362 if (look_ahead_type
== NULL
)
2365 STABS_CONTINUE (pp
, objfile
);
2367 new_sublist
->fn_field
.type
= read_type (pp
, objfile
);
2370 /* Invalid symtab info for member function. */
2376 /* g++ version 1 kludge */
2377 new_sublist
->fn_field
.type
= look_ahead_type
;
2378 look_ahead_type
= NULL
;
2388 /* These are methods, not functions. */
2389 if (TYPE_CODE (new_sublist
->fn_field
.type
) == TYPE_CODE_FUNC
)
2390 TYPE_CODE (new_sublist
->fn_field
.type
) = TYPE_CODE_METHOD
;
2392 gdb_assert (TYPE_CODE (new_sublist
->fn_field
.type
)
2393 == TYPE_CODE_METHOD
);
2395 /* If this is just a stub, then we don't have the real name here. */
2396 if (TYPE_STUB (new_sublist
->fn_field
.type
))
2398 if (!TYPE_SELF_TYPE (new_sublist
->fn_field
.type
))
2399 set_type_self_type (new_sublist
->fn_field
.type
, type
);
2400 new_sublist
->fn_field
.is_stub
= 1;
2403 new_sublist
->fn_field
.physname
= savestring (*pp
, p
- *pp
);
2406 /* Set this member function's visibility fields. */
2409 case VISIBILITY_PRIVATE
:
2410 new_sublist
->fn_field
.is_private
= 1;
2412 case VISIBILITY_PROTECTED
:
2413 new_sublist
->fn_field
.is_protected
= 1;
2417 STABS_CONTINUE (pp
, objfile
);
2420 case 'A': /* Normal functions. */
2421 new_sublist
->fn_field
.is_const
= 0;
2422 new_sublist
->fn_field
.is_volatile
= 0;
2425 case 'B': /* `const' member functions. */
2426 new_sublist
->fn_field
.is_const
= 1;
2427 new_sublist
->fn_field
.is_volatile
= 0;
2430 case 'C': /* `volatile' member function. */
2431 new_sublist
->fn_field
.is_const
= 0;
2432 new_sublist
->fn_field
.is_volatile
= 1;
2435 case 'D': /* `const volatile' member function. */
2436 new_sublist
->fn_field
.is_const
= 1;
2437 new_sublist
->fn_field
.is_volatile
= 1;
2440 case '*': /* File compiled with g++ version 1 --
2446 complaint (&symfile_complaints
,
2447 _("const/volatile indicator missing, got '%c'"),
2457 /* virtual member function, followed by index.
2458 The sign bit is set to distinguish pointers-to-methods
2459 from virtual function indicies. Since the array is
2460 in words, the quantity must be shifted left by 1
2461 on 16 bit machine, and by 2 on 32 bit machine, forcing
2462 the sign bit out, and usable as a valid index into
2463 the array. Remove the sign bit here. */
2464 new_sublist
->fn_field
.voffset
=
2465 (0x7fffffff & read_huge_number (pp
, ';', &nbits
, 0)) + 2;
2469 STABS_CONTINUE (pp
, objfile
);
2470 if (**pp
== ';' || **pp
== '\0')
2472 /* Must be g++ version 1. */
2473 new_sublist
->fn_field
.fcontext
= 0;
2477 /* Figure out from whence this virtual function came.
2478 It may belong to virtual function table of
2479 one of its baseclasses. */
2480 look_ahead_type
= read_type (pp
, objfile
);
2483 /* g++ version 1 overloaded methods. */
2487 new_sublist
->fn_field
.fcontext
= look_ahead_type
;
2496 look_ahead_type
= NULL
;
2502 /* static member function. */
2504 int slen
= strlen (main_fn_name
);
2506 new_sublist
->fn_field
.voffset
= VOFFSET_STATIC
;
2508 /* For static member functions, we can't tell if they
2509 are stubbed, as they are put out as functions, and not as
2511 GCC v2 emits the fully mangled name if
2512 dbxout.c:flag_minimal_debug is not set, so we have to
2513 detect a fully mangled physname here and set is_stub
2514 accordingly. Fully mangled physnames in v2 start with
2515 the member function name, followed by two underscores.
2516 GCC v3 currently always emits stubbed member functions,
2517 but with fully mangled physnames, which start with _Z. */
2518 if (!(strncmp (new_sublist
->fn_field
.physname
,
2519 main_fn_name
, slen
) == 0
2520 && new_sublist
->fn_field
.physname
[slen
] == '_'
2521 && new_sublist
->fn_field
.physname
[slen
+ 1] == '_'))
2523 new_sublist
->fn_field
.is_stub
= 1;
2530 complaint (&symfile_complaints
,
2531 _("member function type missing, got '%c'"),
2533 /* Fall through into normal member function. */
2536 /* normal member function. */
2537 new_sublist
->fn_field
.voffset
= 0;
2538 new_sublist
->fn_field
.fcontext
= 0;
2542 new_sublist
->next
= sublist
;
2543 sublist
= new_sublist
;
2545 STABS_CONTINUE (pp
, objfile
);
2547 while (**pp
!= ';' && **pp
!= '\0');
2550 STABS_CONTINUE (pp
, objfile
);
2552 /* Skip GCC 3.X member functions which are duplicates of the callable
2553 constructor/destructor. */
2554 if (strcmp_iw (main_fn_name
, "__base_ctor ") == 0
2555 || strcmp_iw (main_fn_name
, "__base_dtor ") == 0
2556 || strcmp (main_fn_name
, "__deleting_dtor") == 0)
2558 xfree (main_fn_name
);
2563 int has_destructor
= 0, has_other
= 0;
2565 struct next_fnfield
*tmp_sublist
;
2567 /* Various versions of GCC emit various mostly-useless
2568 strings in the name field for special member functions.
2570 For stub methods, we need to defer correcting the name
2571 until we are ready to unstub the method, because the current
2572 name string is used by gdb_mangle_name. The only stub methods
2573 of concern here are GNU v2 operators; other methods have their
2574 names correct (see caveat below).
2576 For non-stub methods, in GNU v3, we have a complete physname.
2577 Therefore we can safely correct the name now. This primarily
2578 affects constructors and destructors, whose name will be
2579 __comp_ctor or __comp_dtor instead of Foo or ~Foo. Cast
2580 operators will also have incorrect names; for instance,
2581 "operator int" will be named "operator i" (i.e. the type is
2584 For non-stub methods in GNU v2, we have no easy way to
2585 know if we have a complete physname or not. For most
2586 methods the result depends on the platform (if CPLUS_MARKER
2587 can be `$' or `.', it will use minimal debug information, or
2588 otherwise the full physname will be included).
2590 Rather than dealing with this, we take a different approach.
2591 For v3 mangled names, we can use the full physname; for v2,
2592 we use cplus_demangle_opname (which is actually v2 specific),
2593 because the only interesting names are all operators - once again
2594 barring the caveat below. Skip this process if any method in the
2595 group is a stub, to prevent our fouling up the workings of
2598 The caveat: GCC 2.95.x (and earlier?) put constructors and
2599 destructors in the same method group. We need to split this
2600 into two groups, because they should have different names.
2601 So for each method group we check whether it contains both
2602 routines whose physname appears to be a destructor (the physnames
2603 for and destructors are always provided, due to quirks in v2
2604 mangling) and routines whose physname does not appear to be a
2605 destructor. If so then we break up the list into two halves.
2606 Even if the constructors and destructors aren't in the same group
2607 the destructor will still lack the leading tilde, so that also
2610 So, to summarize what we expect and handle here:
2612 Given Given Real Real Action
2613 method name physname physname method name
2615 __opi [none] __opi__3Foo operator int opname
2617 Foo _._3Foo _._3Foo ~Foo separate and
2619 operator i _ZN3FoocviEv _ZN3FoocviEv operator int demangle
2620 __comp_ctor _ZN3FooC1ERKS_ _ZN3FooC1ERKS_ Foo demangle
2623 tmp_sublist
= sublist
;
2624 while (tmp_sublist
!= NULL
)
2626 if (tmp_sublist
->fn_field
.is_stub
)
2628 if (tmp_sublist
->fn_field
.physname
[0] == '_'
2629 && tmp_sublist
->fn_field
.physname
[1] == 'Z')
2632 if (is_destructor_name (tmp_sublist
->fn_field
.physname
))
2637 tmp_sublist
= tmp_sublist
->next
;
2640 if (has_destructor
&& has_other
)
2642 struct next_fnfieldlist
*destr_fnlist
;
2643 struct next_fnfield
*last_sublist
;
2645 /* Create a new fn_fieldlist for the destructors. */
2647 destr_fnlist
= XCNEW (struct next_fnfieldlist
);
2648 make_cleanup (xfree
, destr_fnlist
);
2650 destr_fnlist
->fn_fieldlist
.name
2651 = obconcat (&objfile
->objfile_obstack
, "~",
2652 new_fnlist
->fn_fieldlist
.name
, (char *) NULL
);
2654 destr_fnlist
->fn_fieldlist
.fn_fields
=
2655 XOBNEWVEC (&objfile
->objfile_obstack
,
2656 struct fn_field
, has_destructor
);
2657 memset (destr_fnlist
->fn_fieldlist
.fn_fields
, 0,
2658 sizeof (struct fn_field
) * has_destructor
);
2659 tmp_sublist
= sublist
;
2660 last_sublist
= NULL
;
2662 while (tmp_sublist
!= NULL
)
2664 if (!is_destructor_name (tmp_sublist
->fn_field
.physname
))
2666 tmp_sublist
= tmp_sublist
->next
;
2670 destr_fnlist
->fn_fieldlist
.fn_fields
[i
++]
2671 = tmp_sublist
->fn_field
;
2673 last_sublist
->next
= tmp_sublist
->next
;
2675 sublist
= tmp_sublist
->next
;
2676 last_sublist
= tmp_sublist
;
2677 tmp_sublist
= tmp_sublist
->next
;
2680 destr_fnlist
->fn_fieldlist
.length
= has_destructor
;
2681 destr_fnlist
->next
= fip
->fnlist
;
2682 fip
->fnlist
= destr_fnlist
;
2684 length
-= has_destructor
;
2688 /* v3 mangling prevents the use of abbreviated physnames,
2689 so we can do this here. There are stubbed methods in v3
2691 - in -gstabs instead of -gstabs+
2692 - or for static methods, which are output as a function type
2693 instead of a method type. */
2694 char *new_method_name
=
2695 stabs_method_name_from_physname (sublist
->fn_field
.physname
);
2697 if (new_method_name
!= NULL
2698 && strcmp (new_method_name
,
2699 new_fnlist
->fn_fieldlist
.name
) != 0)
2701 new_fnlist
->fn_fieldlist
.name
= new_method_name
;
2702 xfree (main_fn_name
);
2705 xfree (new_method_name
);
2707 else if (has_destructor
&& new_fnlist
->fn_fieldlist
.name
[0] != '~')
2709 new_fnlist
->fn_fieldlist
.name
=
2710 obconcat (&objfile
->objfile_obstack
,
2711 "~", main_fn_name
, (char *)NULL
);
2712 xfree (main_fn_name
);
2716 char dem_opname
[256];
2719 ret
= cplus_demangle_opname (new_fnlist
->fn_fieldlist
.name
,
2720 dem_opname
, DMGL_ANSI
);
2722 ret
= cplus_demangle_opname (new_fnlist
->fn_fieldlist
.name
,
2725 new_fnlist
->fn_fieldlist
.name
2727 obstack_copy0 (&objfile
->objfile_obstack
, dem_opname
,
2728 strlen (dem_opname
)));
2729 xfree (main_fn_name
);
2732 new_fnlist
->fn_fieldlist
.fn_fields
= (struct fn_field
*)
2733 obstack_alloc (&objfile
->objfile_obstack
,
2734 sizeof (struct fn_field
) * length
);
2735 memset (new_fnlist
->fn_fieldlist
.fn_fields
, 0,
2736 sizeof (struct fn_field
) * length
);
2737 for (i
= length
; (i
--, sublist
); sublist
= sublist
->next
)
2739 new_fnlist
->fn_fieldlist
.fn_fields
[i
] = sublist
->fn_field
;
2742 new_fnlist
->fn_fieldlist
.length
= length
;
2743 new_fnlist
->next
= fip
->fnlist
;
2744 fip
->fnlist
= new_fnlist
;
2751 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
2752 TYPE_FN_FIELDLISTS (type
) = (struct fn_fieldlist
*)
2753 TYPE_ALLOC (type
, sizeof (struct fn_fieldlist
) * nfn_fields
);
2754 memset (TYPE_FN_FIELDLISTS (type
), 0,
2755 sizeof (struct fn_fieldlist
) * nfn_fields
);
2756 TYPE_NFN_FIELDS (type
) = nfn_fields
;
2762 /* Special GNU C++ name.
2764 Returns 1 for success, 0 for failure. "failure" means that we can't
2765 keep parsing and it's time for error_type(). */
2768 read_cpp_abbrev (struct field_info
*fip
, char **pp
, struct type
*type
,
2769 struct objfile
*objfile
)
2774 struct type
*context
;
2784 /* At this point, *pp points to something like "22:23=*22...",
2785 where the type number before the ':' is the "context" and
2786 everything after is a regular type definition. Lookup the
2787 type, find it's name, and construct the field name. */
2789 context
= read_type (pp
, objfile
);
2793 case 'f': /* $vf -- a virtual function table pointer */
2794 name
= type_name_no_tag (context
);
2799 fip
->list
->field
.name
= obconcat (&objfile
->objfile_obstack
,
2800 vptr_name
, name
, (char *) NULL
);
2803 case 'b': /* $vb -- a virtual bsomethingorother */
2804 name
= type_name_no_tag (context
);
2807 complaint (&symfile_complaints
,
2808 _("C++ abbreviated type name "
2809 "unknown at symtab pos %d"),
2813 fip
->list
->field
.name
= obconcat (&objfile
->objfile_obstack
, vb_name
,
2814 name
, (char *) NULL
);
2818 invalid_cpp_abbrev_complaint (*pp
);
2819 fip
->list
->field
.name
= obconcat (&objfile
->objfile_obstack
,
2820 "INVALID_CPLUSPLUS_ABBREV",
2825 /* At this point, *pp points to the ':'. Skip it and read the
2831 invalid_cpp_abbrev_complaint (*pp
);
2834 fip
->list
->field
.type
= read_type (pp
, objfile
);
2836 (*pp
)++; /* Skip the comma. */
2843 SET_FIELD_BITPOS (fip
->list
->field
,
2844 read_huge_number (pp
, ';', &nbits
, 0));
2848 /* This field is unpacked. */
2849 FIELD_BITSIZE (fip
->list
->field
) = 0;
2850 fip
->list
->visibility
= VISIBILITY_PRIVATE
;
2854 invalid_cpp_abbrev_complaint (*pp
);
2855 /* We have no idea what syntax an unrecognized abbrev would have, so
2856 better return 0. If we returned 1, we would need to at least advance
2857 *pp to avoid an infinite loop. */
2864 read_one_struct_field (struct field_info
*fip
, char **pp
, char *p
,
2865 struct type
*type
, struct objfile
*objfile
)
2867 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
2869 fip
->list
->field
.name
2870 = (const char *) obstack_copy0 (&objfile
->objfile_obstack
, *pp
, p
- *pp
);
2873 /* This means we have a visibility for a field coming. */
2877 fip
->list
->visibility
= *(*pp
)++;
2881 /* normal dbx-style format, no explicit visibility */
2882 fip
->list
->visibility
= VISIBILITY_PUBLIC
;
2885 fip
->list
->field
.type
= read_type (pp
, objfile
);
2890 /* Possible future hook for nested types. */
2893 fip
->list
->field
.bitpos
= (long) -2; /* nested type */
2903 /* Static class member. */
2904 SET_FIELD_PHYSNAME (fip
->list
->field
, savestring (*pp
, p
- *pp
));
2908 else if (**pp
!= ',')
2910 /* Bad structure-type format. */
2911 stabs_general_complaint ("bad structure-type format");
2915 (*pp
)++; /* Skip the comma. */
2920 SET_FIELD_BITPOS (fip
->list
->field
,
2921 read_huge_number (pp
, ',', &nbits
, 0));
2924 stabs_general_complaint ("bad structure-type format");
2927 FIELD_BITSIZE (fip
->list
->field
) = read_huge_number (pp
, ';', &nbits
, 0);
2930 stabs_general_complaint ("bad structure-type format");
2935 if (FIELD_BITPOS (fip
->list
->field
) == 0
2936 && FIELD_BITSIZE (fip
->list
->field
) == 0)
2938 /* This can happen in two cases: (1) at least for gcc 2.4.5 or so,
2939 it is a field which has been optimized out. The correct stab for
2940 this case is to use VISIBILITY_IGNORE, but that is a recent
2941 invention. (2) It is a 0-size array. For example
2942 union { int num; char str[0]; } foo. Printing _("<no value>" for
2943 str in "p foo" is OK, since foo.str (and thus foo.str[3])
2944 will continue to work, and a 0-size array as a whole doesn't
2945 have any contents to print.
2947 I suspect this probably could also happen with gcc -gstabs (not
2948 -gstabs+) for static fields, and perhaps other C++ extensions.
2949 Hopefully few people use -gstabs with gdb, since it is intended
2950 for dbx compatibility. */
2952 /* Ignore this field. */
2953 fip
->list
->visibility
= VISIBILITY_IGNORE
;
2957 /* Detect an unpacked field and mark it as such.
2958 dbx gives a bit size for all fields.
2959 Note that forward refs cannot be packed,
2960 and treat enums as if they had the width of ints. */
2962 struct type
*field_type
= check_typedef (FIELD_TYPE (fip
->list
->field
));
2964 if (TYPE_CODE (field_type
) != TYPE_CODE_INT
2965 && TYPE_CODE (field_type
) != TYPE_CODE_RANGE
2966 && TYPE_CODE (field_type
) != TYPE_CODE_BOOL
2967 && TYPE_CODE (field_type
) != TYPE_CODE_ENUM
)
2969 FIELD_BITSIZE (fip
->list
->field
) = 0;
2971 if ((FIELD_BITSIZE (fip
->list
->field
)
2972 == TARGET_CHAR_BIT
* TYPE_LENGTH (field_type
)
2973 || (TYPE_CODE (field_type
) == TYPE_CODE_ENUM
2974 && FIELD_BITSIZE (fip
->list
->field
)
2975 == gdbarch_int_bit (gdbarch
))
2978 FIELD_BITPOS (fip
->list
->field
) % 8 == 0)
2980 FIELD_BITSIZE (fip
->list
->field
) = 0;
2986 /* Read struct or class data fields. They have the form:
2988 NAME : [VISIBILITY] TYPENUM , BITPOS , BITSIZE ;
2990 At the end, we see a semicolon instead of a field.
2992 In C++, this may wind up being NAME:?TYPENUM:PHYSNAME; for
2995 The optional VISIBILITY is one of:
2997 '/0' (VISIBILITY_PRIVATE)
2998 '/1' (VISIBILITY_PROTECTED)
2999 '/2' (VISIBILITY_PUBLIC)
3000 '/9' (VISIBILITY_IGNORE)
3002 or nothing, for C style fields with public visibility.
3004 Returns 1 for success, 0 for failure. */
3007 read_struct_fields (struct field_info
*fip
, char **pp
, struct type
*type
,
3008 struct objfile
*objfile
)
3011 struct nextfield
*newobj
;
3013 /* We better set p right now, in case there are no fields at all... */
3017 /* Read each data member type until we find the terminating ';' at the end of
3018 the data member list, or break for some other reason such as finding the
3019 start of the member function list. */
3020 /* Stab string for structure/union does not end with two ';' in
3021 SUN C compiler 5.3 i.e. F6U2, hence check for end of string. */
3023 while (**pp
!= ';' && **pp
!= '\0')
3025 STABS_CONTINUE (pp
, objfile
);
3026 /* Get space to record the next field's data. */
3027 newobj
= XCNEW (struct nextfield
);
3028 make_cleanup (xfree
, newobj
);
3030 newobj
->next
= fip
->list
;
3033 /* Get the field name. */
3036 /* If is starts with CPLUS_MARKER it is a special abbreviation,
3037 unless the CPLUS_MARKER is followed by an underscore, in
3038 which case it is just the name of an anonymous type, which we
3039 should handle like any other type name. */
3041 if (is_cplus_marker (p
[0]) && p
[1] != '_')
3043 if (!read_cpp_abbrev (fip
, pp
, type
, objfile
))
3048 /* Look for the ':' that separates the field name from the field
3049 values. Data members are delimited by a single ':', while member
3050 functions are delimited by a pair of ':'s. When we hit the member
3051 functions (if any), terminate scan loop and return. */
3053 while (*p
!= ':' && *p
!= '\0')
3060 /* Check to see if we have hit the member functions yet. */
3065 read_one_struct_field (fip
, pp
, p
, type
, objfile
);
3067 if (p
[0] == ':' && p
[1] == ':')
3069 /* (the deleted) chill the list of fields: the last entry (at
3070 the head) is a partially constructed entry which we now
3072 fip
->list
= fip
->list
->next
;
3077 /* The stabs for C++ derived classes contain baseclass information which
3078 is marked by a '!' character after the total size. This function is
3079 called when we encounter the baseclass marker, and slurps up all the
3080 baseclass information.
3082 Immediately following the '!' marker is the number of base classes that
3083 the class is derived from, followed by information for each base class.
3084 For each base class, there are two visibility specifiers, a bit offset
3085 to the base class information within the derived class, a reference to
3086 the type for the base class, and a terminating semicolon.
3088 A typical example, with two base classes, would be "!2,020,19;0264,21;".
3090 Baseclass information marker __________________|| | | | | | |
3091 Number of baseclasses __________________________| | | | | | |
3092 Visibility specifiers (2) ________________________| | | | | |
3093 Offset in bits from start of class _________________| | | | |
3094 Type number for base class ___________________________| | | |
3095 Visibility specifiers (2) _______________________________| | |
3096 Offset in bits from start of class ________________________| |
3097 Type number of base class ____________________________________|
3099 Return 1 for success, 0 for (error-type-inducing) failure. */
3105 read_baseclasses (struct field_info
*fip
, char **pp
, struct type
*type
,
3106 struct objfile
*objfile
)
3109 struct nextfield
*newobj
;
3117 /* Skip the '!' baseclass information marker. */
3121 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
3125 TYPE_N_BASECLASSES (type
) = read_huge_number (pp
, ',', &nbits
, 0);
3131 /* Some stupid compilers have trouble with the following, so break
3132 it up into simpler expressions. */
3133 TYPE_FIELD_VIRTUAL_BITS (type
) = (B_TYPE
*)
3134 TYPE_ALLOC (type
, B_BYTES (TYPE_N_BASECLASSES (type
)));
3137 int num_bytes
= B_BYTES (TYPE_N_BASECLASSES (type
));
3140 pointer
= (char *) TYPE_ALLOC (type
, num_bytes
);
3141 TYPE_FIELD_VIRTUAL_BITS (type
) = (B_TYPE
*) pointer
;
3145 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type
), TYPE_N_BASECLASSES (type
));
3147 for (i
= 0; i
< TYPE_N_BASECLASSES (type
); i
++)
3149 newobj
= XCNEW (struct nextfield
);
3150 make_cleanup (xfree
, newobj
);
3152 newobj
->next
= fip
->list
;
3154 FIELD_BITSIZE (newobj
->field
) = 0; /* This should be an unpacked
3157 STABS_CONTINUE (pp
, objfile
);
3161 /* Nothing to do. */
3164 SET_TYPE_FIELD_VIRTUAL (type
, i
);
3167 /* Unknown character. Complain and treat it as non-virtual. */
3169 complaint (&symfile_complaints
,
3170 _("Unknown virtual character `%c' for baseclass"),
3176 newobj
->visibility
= *(*pp
)++;
3177 switch (newobj
->visibility
)
3179 case VISIBILITY_PRIVATE
:
3180 case VISIBILITY_PROTECTED
:
3181 case VISIBILITY_PUBLIC
:
3184 /* Bad visibility format. Complain and treat it as
3187 complaint (&symfile_complaints
,
3188 _("Unknown visibility `%c' for baseclass"),
3189 newobj
->visibility
);
3190 newobj
->visibility
= VISIBILITY_PUBLIC
;
3197 /* The remaining value is the bit offset of the portion of the object
3198 corresponding to this baseclass. Always zero in the absence of
3199 multiple inheritance. */
3201 SET_FIELD_BITPOS (newobj
->field
, read_huge_number (pp
, ',', &nbits
, 0));
3206 /* The last piece of baseclass information is the type of the
3207 base class. Read it, and remember it's type name as this
3210 newobj
->field
.type
= read_type (pp
, objfile
);
3211 newobj
->field
.name
= type_name_no_tag (newobj
->field
.type
);
3213 /* Skip trailing ';' and bump count of number of fields seen. */
3222 /* The tail end of stabs for C++ classes that contain a virtual function
3223 pointer contains a tilde, a %, and a type number.
3224 The type number refers to the base class (possibly this class itself) which
3225 contains the vtable pointer for the current class.
3227 This function is called when we have parsed all the method declarations,
3228 so we can look for the vptr base class info. */
3231 read_tilde_fields (struct field_info
*fip
, char **pp
, struct type
*type
,
3232 struct objfile
*objfile
)
3236 STABS_CONTINUE (pp
, objfile
);
3238 /* If we are positioned at a ';', then skip it. */
3248 if (**pp
== '=' || **pp
== '+' || **pp
== '-')
3250 /* Obsolete flags that used to indicate the presence
3251 of constructors and/or destructors. */
3255 /* Read either a '%' or the final ';'. */
3256 if (*(*pp
)++ == '%')
3258 /* The next number is the type number of the base class
3259 (possibly our own class) which supplies the vtable for
3260 this class. Parse it out, and search that class to find
3261 its vtable pointer, and install those into TYPE_VPTR_BASETYPE
3262 and TYPE_VPTR_FIELDNO. */
3267 t
= read_type (pp
, objfile
);
3269 while (*p
!= '\0' && *p
!= ';')
3275 /* Premature end of symbol. */
3279 set_type_vptr_basetype (type
, t
);
3280 if (type
== t
) /* Our own class provides vtbl ptr. */
3282 for (i
= TYPE_NFIELDS (t
) - 1;
3283 i
>= TYPE_N_BASECLASSES (t
);
3286 const char *name
= TYPE_FIELD_NAME (t
, i
);
3288 if (!strncmp (name
, vptr_name
, sizeof (vptr_name
) - 2)
3289 && is_cplus_marker (name
[sizeof (vptr_name
) - 2]))
3291 set_type_vptr_fieldno (type
, i
);
3295 /* Virtual function table field not found. */
3296 complaint (&symfile_complaints
,
3297 _("virtual function table pointer "
3298 "not found when defining class `%s'"),
3304 set_type_vptr_fieldno (type
, TYPE_VPTR_FIELDNO (t
));
3315 attach_fn_fields_to_type (struct field_info
*fip
, struct type
*type
)
3319 for (n
= TYPE_NFN_FIELDS (type
);
3320 fip
->fnlist
!= NULL
;
3321 fip
->fnlist
= fip
->fnlist
->next
)
3323 --n
; /* Circumvent Sun3 compiler bug. */
3324 TYPE_FN_FIELDLISTS (type
)[n
] = fip
->fnlist
->fn_fieldlist
;
3329 /* Create the vector of fields, and record how big it is.
3330 We need this info to record proper virtual function table information
3331 for this class's virtual functions. */
3334 attach_fields_to_type (struct field_info
*fip
, struct type
*type
,
3335 struct objfile
*objfile
)
3338 int non_public_fields
= 0;
3339 struct nextfield
*scan
;
3341 /* Count up the number of fields that we have, as well as taking note of
3342 whether or not there are any non-public fields, which requires us to
3343 allocate and build the private_field_bits and protected_field_bits
3346 for (scan
= fip
->list
; scan
!= NULL
; scan
= scan
->next
)
3349 if (scan
->visibility
!= VISIBILITY_PUBLIC
)
3351 non_public_fields
++;
3355 /* Now we know how many fields there are, and whether or not there are any
3356 non-public fields. Record the field count, allocate space for the
3357 array of fields, and create blank visibility bitfields if necessary. */
3359 TYPE_NFIELDS (type
) = nfields
;
3360 TYPE_FIELDS (type
) = (struct field
*)
3361 TYPE_ALLOC (type
, sizeof (struct field
) * nfields
);
3362 memset (TYPE_FIELDS (type
), 0, sizeof (struct field
) * nfields
);
3364 if (non_public_fields
)
3366 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
3368 TYPE_FIELD_PRIVATE_BITS (type
) =
3369 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
3370 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type
), nfields
);
3372 TYPE_FIELD_PROTECTED_BITS (type
) =
3373 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
3374 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type
), nfields
);
3376 TYPE_FIELD_IGNORE_BITS (type
) =
3377 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
3378 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type
), nfields
);
3381 /* Copy the saved-up fields into the field vector. Start from the
3382 head of the list, adding to the tail of the field array, so that
3383 they end up in the same order in the array in which they were
3384 added to the list. */
3386 while (nfields
-- > 0)
3388 TYPE_FIELD (type
, nfields
) = fip
->list
->field
;
3389 switch (fip
->list
->visibility
)
3391 case VISIBILITY_PRIVATE
:
3392 SET_TYPE_FIELD_PRIVATE (type
, nfields
);
3395 case VISIBILITY_PROTECTED
:
3396 SET_TYPE_FIELD_PROTECTED (type
, nfields
);
3399 case VISIBILITY_IGNORE
:
3400 SET_TYPE_FIELD_IGNORE (type
, nfields
);
3403 case VISIBILITY_PUBLIC
:
3407 /* Unknown visibility. Complain and treat it as public. */
3409 complaint (&symfile_complaints
,
3410 _("Unknown visibility `%c' for field"),
3411 fip
->list
->visibility
);
3415 fip
->list
= fip
->list
->next
;
3421 /* Complain that the compiler has emitted more than one definition for the
3422 structure type TYPE. */
3424 complain_about_struct_wipeout (struct type
*type
)
3426 const char *name
= "";
3427 const char *kind
= "";
3429 if (TYPE_TAG_NAME (type
))
3431 name
= TYPE_TAG_NAME (type
);
3432 switch (TYPE_CODE (type
))
3434 case TYPE_CODE_STRUCT
: kind
= "struct "; break;
3435 case TYPE_CODE_UNION
: kind
= "union "; break;
3436 case TYPE_CODE_ENUM
: kind
= "enum "; break;
3440 else if (TYPE_NAME (type
))
3442 name
= TYPE_NAME (type
);
3451 complaint (&symfile_complaints
,
3452 _("struct/union type gets multiply defined: %s%s"), kind
, name
);
3455 /* Set the length for all variants of a same main_type, which are
3456 connected in the closed chain.
3458 This is something that needs to be done when a type is defined *after*
3459 some cross references to this type have already been read. Consider
3460 for instance the following scenario where we have the following two
3463 .stabs "t:p(0,21)=*(0,22)=k(0,23)=xsdummy:",160,0,28,-24
3464 .stabs "dummy:T(0,23)=s16x:(0,1),0,3[...]"
3466 A stubbed version of type dummy is created while processing the first
3467 stabs entry. The length of that type is initially set to zero, since
3468 it is unknown at this point. Also, a "constant" variation of type
3469 "dummy" is created as well (this is the "(0,22)=k(0,23)" section of
3472 The second stabs entry allows us to replace the stubbed definition
3473 with the real definition. However, we still need to adjust the length
3474 of the "constant" variation of that type, as its length was left
3475 untouched during the main type replacement... */
3478 set_length_in_type_chain (struct type
*type
)
3480 struct type
*ntype
= TYPE_CHAIN (type
);
3482 while (ntype
!= type
)
3484 if (TYPE_LENGTH(ntype
) == 0)
3485 TYPE_LENGTH (ntype
) = TYPE_LENGTH (type
);
3487 complain_about_struct_wipeout (ntype
);
3488 ntype
= TYPE_CHAIN (ntype
);
3492 /* Read the description of a structure (or union type) and return an object
3493 describing the type.
3495 PP points to a character pointer that points to the next unconsumed token
3496 in the stabs string. For example, given stabs "A:T4=s4a:1,0,32;;",
3497 *PP will point to "4a:1,0,32;;".
3499 TYPE points to an incomplete type that needs to be filled in.
3501 OBJFILE points to the current objfile from which the stabs information is
3502 being read. (Note that it is redundant in that TYPE also contains a pointer
3503 to this same objfile, so it might be a good idea to eliminate it. FIXME).
3506 static struct type
*
3507 read_struct_type (char **pp
, struct type
*type
, enum type_code type_code
,
3508 struct objfile
*objfile
)
3510 struct cleanup
*back_to
;
3511 struct field_info fi
;
3516 /* When describing struct/union/class types in stabs, G++ always drops
3517 all qualifications from the name. So if you've got:
3518 struct A { ... struct B { ... }; ... };
3519 then G++ will emit stabs for `struct A::B' that call it simply
3520 `struct B'. Obviously, if you've got a real top-level definition for
3521 `struct B', or other nested definitions, this is going to cause
3524 Obviously, GDB can't fix this by itself, but it can at least avoid
3525 scribbling on existing structure type objects when new definitions
3527 if (! (TYPE_CODE (type
) == TYPE_CODE_UNDEF
3528 || TYPE_STUB (type
)))
3530 complain_about_struct_wipeout (type
);
3532 /* It's probably best to return the type unchanged. */
3536 back_to
= make_cleanup (null_cleanup
, 0);
3538 INIT_CPLUS_SPECIFIC (type
);
3539 TYPE_CODE (type
) = type_code
;
3540 TYPE_STUB (type
) = 0;
3542 /* First comes the total size in bytes. */
3547 TYPE_LENGTH (type
) = read_huge_number (pp
, 0, &nbits
, 0);
3550 do_cleanups (back_to
);
3551 return error_type (pp
, objfile
);
3553 set_length_in_type_chain (type
);
3556 /* Now read the baseclasses, if any, read the regular C struct or C++
3557 class member fields, attach the fields to the type, read the C++
3558 member functions, attach them to the type, and then read any tilde
3559 field (baseclass specifier for the class holding the main vtable). */
3561 if (!read_baseclasses (&fi
, pp
, type
, objfile
)
3562 || !read_struct_fields (&fi
, pp
, type
, objfile
)
3563 || !attach_fields_to_type (&fi
, type
, objfile
)
3564 || !read_member_functions (&fi
, pp
, type
, objfile
)
3565 || !attach_fn_fields_to_type (&fi
, type
)
3566 || !read_tilde_fields (&fi
, pp
, type
, objfile
))
3568 type
= error_type (pp
, objfile
);
3571 do_cleanups (back_to
);
3575 /* Read a definition of an array type,
3576 and create and return a suitable type object.
3577 Also creates a range type which represents the bounds of that
3580 static struct type
*
3581 read_array_type (char **pp
, struct type
*type
,
3582 struct objfile
*objfile
)
3584 struct type
*index_type
, *element_type
, *range_type
;
3589 /* Format of an array type:
3590 "ar<index type>;lower;upper;<array_contents_type>".
3591 OS9000: "arlower,upper;<array_contents_type>".
3593 Fortran adjustable arrays use Adigits or Tdigits for lower or upper;
3594 for these, produce a type like float[][]. */
3597 index_type
= read_type (pp
, objfile
);
3599 /* Improper format of array type decl. */
3600 return error_type (pp
, objfile
);
3604 if (!(**pp
>= '0' && **pp
<= '9') && **pp
!= '-')
3609 lower
= read_huge_number (pp
, ';', &nbits
, 0);
3612 return error_type (pp
, objfile
);
3614 if (!(**pp
>= '0' && **pp
<= '9') && **pp
!= '-')
3619 upper
= read_huge_number (pp
, ';', &nbits
, 0);
3621 return error_type (pp
, objfile
);
3623 element_type
= read_type (pp
, objfile
);
3632 create_static_range_type ((struct type
*) NULL
, index_type
, lower
, upper
);
3633 type
= create_array_type (type
, element_type
, range_type
);
3639 /* Read a definition of an enumeration type,
3640 and create and return a suitable type object.
3641 Also defines the symbols that represent the values of the type. */
3643 static struct type
*
3644 read_enum_type (char **pp
, struct type
*type
,
3645 struct objfile
*objfile
)
3647 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
3653 struct pending
**symlist
;
3654 struct pending
*osyms
, *syms
;
3657 int unsigned_enum
= 1;
3660 /* FIXME! The stabs produced by Sun CC merrily define things that ought
3661 to be file-scope, between N_FN entries, using N_LSYM. What's a mother
3662 to do? For now, force all enum values to file scope. */
3663 if (within_function
)
3664 symlist
= &local_symbols
;
3667 symlist
= &file_symbols
;
3669 o_nsyms
= osyms
? osyms
->nsyms
: 0;
3671 /* The aix4 compiler emits an extra field before the enum members;
3672 my guess is it's a type of some sort. Just ignore it. */
3675 /* Skip over the type. */
3679 /* Skip over the colon. */
3683 /* Read the value-names and their values.
3684 The input syntax is NAME:VALUE,NAME:VALUE, and so on.
3685 A semicolon or comma instead of a NAME means the end. */
3686 while (**pp
&& **pp
!= ';' && **pp
!= ',')
3688 STABS_CONTINUE (pp
, objfile
);
3692 name
= (char *) obstack_copy0 (&objfile
->objfile_obstack
, *pp
, p
- *pp
);
3694 n
= read_huge_number (pp
, ',', &nbits
, 0);
3696 return error_type (pp
, objfile
);
3698 sym
= allocate_symbol (objfile
);
3699 SYMBOL_SET_LINKAGE_NAME (sym
, name
);
3700 SYMBOL_SET_LANGUAGE (sym
, current_subfile
->language
,
3701 &objfile
->objfile_obstack
);
3702 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST
;
3703 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
3704 SYMBOL_VALUE (sym
) = n
;
3707 add_symbol_to_list (sym
, symlist
);
3712 (*pp
)++; /* Skip the semicolon. */
3714 /* Now fill in the fields of the type-structure. */
3716 TYPE_LENGTH (type
) = gdbarch_int_bit (gdbarch
) / HOST_CHAR_BIT
;
3717 set_length_in_type_chain (type
);
3718 TYPE_CODE (type
) = TYPE_CODE_ENUM
;
3719 TYPE_STUB (type
) = 0;
3721 TYPE_UNSIGNED (type
) = 1;
3722 TYPE_NFIELDS (type
) = nsyms
;
3723 TYPE_FIELDS (type
) = (struct field
*)
3724 TYPE_ALLOC (type
, sizeof (struct field
) * nsyms
);
3725 memset (TYPE_FIELDS (type
), 0, sizeof (struct field
) * nsyms
);
3727 /* Find the symbols for the values and put them into the type.
3728 The symbols can be found in the symlist that we put them on
3729 to cause them to be defined. osyms contains the old value
3730 of that symlist; everything up to there was defined by us. */
3731 /* Note that we preserve the order of the enum constants, so
3732 that in something like "enum {FOO, LAST_THING=FOO}" we print
3733 FOO, not LAST_THING. */
3735 for (syms
= *symlist
, n
= nsyms
- 1; syms
; syms
= syms
->next
)
3737 int last
= syms
== osyms
? o_nsyms
: 0;
3738 int j
= syms
->nsyms
;
3740 for (; --j
>= last
; --n
)
3742 struct symbol
*xsym
= syms
->symbol
[j
];
3744 SYMBOL_TYPE (xsym
) = type
;
3745 TYPE_FIELD_NAME (type
, n
) = SYMBOL_LINKAGE_NAME (xsym
);
3746 SET_FIELD_ENUMVAL (TYPE_FIELD (type
, n
), SYMBOL_VALUE (xsym
));
3747 TYPE_FIELD_BITSIZE (type
, n
) = 0;
3756 /* Sun's ACC uses a somewhat saner method for specifying the builtin
3757 typedefs in every file (for int, long, etc):
3759 type = b <signed> <width> <format type>; <offset>; <nbits>
3761 optional format type = c or b for char or boolean.
3762 offset = offset from high order bit to start bit of type.
3763 width is # bytes in object of this type, nbits is # bits in type.
3765 The width/offset stuff appears to be for small objects stored in
3766 larger ones (e.g. `shorts' in `int' registers). We ignore it for now,
3769 static struct type
*
3770 read_sun_builtin_type (char **pp
, int typenums
[2], struct objfile
*objfile
)
3775 int boolean_type
= 0;
3786 return error_type (pp
, objfile
);
3790 /* For some odd reason, all forms of char put a c here. This is strange
3791 because no other type has this honor. We can safely ignore this because
3792 we actually determine 'char'acterness by the number of bits specified in
3794 Boolean forms, e.g Fortran logical*X, put a b here. */
3798 else if (**pp
== 'b')
3804 /* The first number appears to be the number of bytes occupied
3805 by this type, except that unsigned short is 4 instead of 2.
3806 Since this information is redundant with the third number,
3807 we will ignore it. */
3808 read_huge_number (pp
, ';', &nbits
, 0);
3810 return error_type (pp
, objfile
);
3812 /* The second number is always 0, so ignore it too. */
3813 read_huge_number (pp
, ';', &nbits
, 0);
3815 return error_type (pp
, objfile
);
3817 /* The third number is the number of bits for this type. */
3818 type_bits
= read_huge_number (pp
, 0, &nbits
, 0);
3820 return error_type (pp
, objfile
);
3821 /* The type *should* end with a semicolon. If it are embedded
3822 in a larger type the semicolon may be the only way to know where
3823 the type ends. If this type is at the end of the stabstring we
3824 can deal with the omitted semicolon (but we don't have to like
3825 it). Don't bother to complain(), Sun's compiler omits the semicolon
3832 struct type
*type
= init_type (objfile
, TYPE_CODE_VOID
, 1, NULL
);
3834 TYPE_UNSIGNED (type
) = 1;
3839 return init_boolean_type (objfile
, type_bits
, unsigned_type
, NULL
);
3841 return init_integer_type (objfile
, type_bits
, unsigned_type
, NULL
);
3844 static struct type
*
3845 read_sun_floating_type (char **pp
, int typenums
[2], struct objfile
*objfile
)
3850 struct type
*rettype
;
3852 /* The first number has more details about the type, for example
3854 details
= read_huge_number (pp
, ';', &nbits
, 0);
3856 return error_type (pp
, objfile
);
3858 /* The second number is the number of bytes occupied by this type. */
3859 nbytes
= read_huge_number (pp
, ';', &nbits
, 0);
3861 return error_type (pp
, objfile
);
3863 nbits
= nbytes
* TARGET_CHAR_BIT
;
3865 if (details
== NF_COMPLEX
|| details
== NF_COMPLEX16
3866 || details
== NF_COMPLEX32
)
3868 rettype
= dbx_init_float_type (objfile
, nbits
/ 2);
3869 return init_complex_type (objfile
, NULL
, rettype
);
3872 return dbx_init_float_type (objfile
, nbits
);
3875 /* Read a number from the string pointed to by *PP.
3876 The value of *PP is advanced over the number.
3877 If END is nonzero, the character that ends the
3878 number must match END, or an error happens;
3879 and that character is skipped if it does match.
3880 If END is zero, *PP is left pointing to that character.
3882 If TWOS_COMPLEMENT_BITS is set to a strictly positive value and if
3883 the number is represented in an octal representation, assume that
3884 it is represented in a 2's complement representation with a size of
3885 TWOS_COMPLEMENT_BITS.
3887 If the number fits in a long, set *BITS to 0 and return the value.
3888 If not, set *BITS to be the number of bits in the number and return 0.
3890 If encounter garbage, set *BITS to -1 and return 0. */
3893 read_huge_number (char **pp
, int end
, int *bits
, int twos_complement_bits
)
3904 int twos_complement_representation
= 0;
3912 /* Leading zero means octal. GCC uses this to output values larger
3913 than an int (because that would be hard in decimal). */
3920 /* Skip extra zeros. */
3924 if (sign
> 0 && radix
== 8 && twos_complement_bits
> 0)
3926 /* Octal, possibly signed. Check if we have enough chars for a
3932 while ((c
= *p1
) >= '0' && c
< '8')
3936 if (len
> twos_complement_bits
/ 3
3937 || (twos_complement_bits
% 3 == 0
3938 && len
== twos_complement_bits
/ 3))
3940 /* Ok, we have enough characters for a signed value, check
3941 for signness by testing if the sign bit is set. */
3942 sign_bit
= (twos_complement_bits
% 3 + 2) % 3;
3944 if (c
& (1 << sign_bit
))
3946 /* Definitely signed. */
3947 twos_complement_representation
= 1;
3953 upper_limit
= LONG_MAX
/ radix
;
3955 while ((c
= *p
++) >= '0' && c
< ('0' + radix
))
3957 if (n
<= upper_limit
)
3959 if (twos_complement_representation
)
3961 /* Octal, signed, twos complement representation. In
3962 this case, n is the corresponding absolute value. */
3965 long sn
= c
- '0' - ((2 * (c
- '0')) | (2 << sign_bit
));
3977 /* unsigned representation */
3979 n
+= c
- '0'; /* FIXME this overflows anyway. */
3985 /* This depends on large values being output in octal, which is
3992 /* Ignore leading zeroes. */
3996 else if (c
== '2' || c
== '3')
4017 if (radix
== 8 && twos_complement_bits
> 0 && nbits
> twos_complement_bits
)
4019 /* We were supposed to parse a number with maximum
4020 TWOS_COMPLEMENT_BITS bits, but something went wrong. */
4031 /* Large decimal constants are an error (because it is hard to
4032 count how many bits are in them). */
4038 /* -0x7f is the same as 0x80. So deal with it by adding one to
4039 the number of bits. Two's complement represention octals
4040 can't have a '-' in front. */
4041 if (sign
== -1 && !twos_complement_representation
)
4052 /* It's *BITS which has the interesting information. */
4056 static struct type
*
4057 read_range_type (char **pp
, int typenums
[2], int type_size
,
4058 struct objfile
*objfile
)
4060 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
4061 char *orig_pp
= *pp
;
4066 struct type
*result_type
;
4067 struct type
*index_type
= NULL
;
4069 /* First comes a type we are a subrange of.
4070 In C it is usually 0, 1 or the type being defined. */
4071 if (read_type_number (pp
, rangenums
) != 0)
4072 return error_type (pp
, objfile
);
4073 self_subrange
= (rangenums
[0] == typenums
[0] &&
4074 rangenums
[1] == typenums
[1]);
4079 index_type
= read_type (pp
, objfile
);
4082 /* A semicolon should now follow; skip it. */
4086 /* The remaining two operands are usually lower and upper bounds
4087 of the range. But in some special cases they mean something else. */
4088 n2
= read_huge_number (pp
, ';', &n2bits
, type_size
);
4089 n3
= read_huge_number (pp
, ';', &n3bits
, type_size
);
4091 if (n2bits
== -1 || n3bits
== -1)
4092 return error_type (pp
, objfile
);
4095 goto handle_true_range
;
4097 /* If limits are huge, must be large integral type. */
4098 if (n2bits
!= 0 || n3bits
!= 0)
4100 char got_signed
= 0;
4101 char got_unsigned
= 0;
4102 /* Number of bits in the type. */
4105 /* If a type size attribute has been specified, the bounds of
4106 the range should fit in this size. If the lower bounds needs
4107 more bits than the upper bound, then the type is signed. */
4108 if (n2bits
<= type_size
&& n3bits
<= type_size
)
4110 if (n2bits
== type_size
&& n2bits
> n3bits
)
4116 /* Range from 0 to <large number> is an unsigned large integral type. */
4117 else if ((n2bits
== 0 && n2
== 0) && n3bits
!= 0)
4122 /* Range from <large number> to <large number>-1 is a large signed
4123 integral type. Take care of the case where <large number> doesn't
4124 fit in a long but <large number>-1 does. */
4125 else if ((n2bits
!= 0 && n3bits
!= 0 && n2bits
== n3bits
+ 1)
4126 || (n2bits
!= 0 && n3bits
== 0
4127 && (n2bits
== sizeof (long) * HOST_CHAR_BIT
)
4134 if (got_signed
|| got_unsigned
)
4135 return init_integer_type (objfile
, nbits
, got_unsigned
, NULL
);
4137 return error_type (pp
, objfile
);
4140 /* A type defined as a subrange of itself, with bounds both 0, is void. */
4141 if (self_subrange
&& n2
== 0 && n3
== 0)
4142 return init_type (objfile
, TYPE_CODE_VOID
, 1, NULL
);
4144 /* If n3 is zero and n2 is positive, we want a floating type, and n2
4145 is the width in bytes.
4147 Fortran programs appear to use this for complex types also. To
4148 distinguish between floats and complex, g77 (and others?) seem
4149 to use self-subranges for the complexes, and subranges of int for
4152 Also note that for complexes, g77 sets n2 to the size of one of
4153 the member floats, not the whole complex beast. My guess is that
4154 this was to work well with pre-COMPLEX versions of gdb. */
4156 if (n3
== 0 && n2
> 0)
4158 struct type
*float_type
4159 = dbx_init_float_type (objfile
, n2
* TARGET_CHAR_BIT
);
4162 return init_complex_type (objfile
, NULL
, float_type
);
4167 /* If the upper bound is -1, it must really be an unsigned integral. */
4169 else if (n2
== 0 && n3
== -1)
4171 int bits
= type_size
;
4175 /* We don't know its size. It is unsigned int or unsigned
4176 long. GCC 2.3.3 uses this for long long too, but that is
4177 just a GDB 3.5 compatibility hack. */
4178 bits
= gdbarch_int_bit (gdbarch
);
4181 return init_integer_type (objfile
, bits
, 1, NULL
);
4184 /* Special case: char is defined (Who knows why) as a subrange of
4185 itself with range 0-127. */
4186 else if (self_subrange
&& n2
== 0 && n3
== 127)
4188 struct type
*type
= init_integer_type (objfile
, 1, 0, NULL
);
4189 TYPE_NOSIGN (type
) = 1;
4192 /* We used to do this only for subrange of self or subrange of int. */
4195 /* -1 is used for the upper bound of (4 byte) "unsigned int" and
4196 "unsigned long", and we already checked for that,
4197 so don't need to test for it here. */
4200 /* n3 actually gives the size. */
4201 return init_integer_type (objfile
, -n3
* TARGET_CHAR_BIT
, 1, NULL
);
4203 /* Is n3 == 2**(8n)-1 for some integer n? Then it's an
4204 unsigned n-byte integer. But do require n to be a power of
4205 two; we don't want 3- and 5-byte integers flying around. */
4211 for (bytes
= 0; (bits
& 0xff) == 0xff; bytes
++)
4214 && ((bytes
- 1) & bytes
) == 0) /* "bytes is a power of two" */
4215 return init_integer_type (objfile
, bytes
* TARGET_CHAR_BIT
, 1, NULL
);
4218 /* I think this is for Convex "long long". Since I don't know whether
4219 Convex sets self_subrange, I also accept that particular size regardless
4220 of self_subrange. */
4221 else if (n3
== 0 && n2
< 0
4223 || n2
== -gdbarch_long_long_bit
4224 (gdbarch
) / TARGET_CHAR_BIT
))
4225 return init_integer_type (objfile
, -n2
* TARGET_CHAR_BIT
, 0, NULL
);
4226 else if (n2
== -n3
- 1)
4229 return init_integer_type (objfile
, 8, 0, NULL
);
4231 return init_integer_type (objfile
, 16, 0, NULL
);
4232 if (n3
== 0x7fffffff)
4233 return init_integer_type (objfile
, 32, 0, NULL
);
4236 /* We have a real range type on our hands. Allocate space and
4237 return a real pointer. */
4241 index_type
= objfile_type (objfile
)->builtin_int
;
4243 index_type
= *dbx_lookup_type (rangenums
, objfile
);
4244 if (index_type
== NULL
)
4246 /* Does this actually ever happen? Is that why we are worrying
4247 about dealing with it rather than just calling error_type? */
4249 complaint (&symfile_complaints
,
4250 _("base type %d of range type is not defined"), rangenums
[1]);
4252 index_type
= objfile_type (objfile
)->builtin_int
;
4256 = create_static_range_type ((struct type
*) NULL
, index_type
, n2
, n3
);
4257 return (result_type
);
4260 /* Read in an argument list. This is a list of types, separated by commas
4261 and terminated with END. Return the list of types read in, or NULL
4262 if there is an error. */
4264 static struct field
*
4265 read_args (char **pp
, int end
, struct objfile
*objfile
, int *nargsp
,
4268 /* FIXME! Remove this arbitrary limit! */
4269 struct type
*types
[1024]; /* Allow for fns of 1023 parameters. */
4276 /* Invalid argument list: no ','. */
4279 STABS_CONTINUE (pp
, objfile
);
4280 types
[n
++] = read_type (pp
, objfile
);
4282 (*pp
)++; /* get past `end' (the ':' character). */
4286 /* We should read at least the THIS parameter here. Some broken stabs
4287 output contained `(0,41),(0,42)=@s8;-16;,(0,43),(0,1);' where should
4288 have been present ";-16,(0,43)" reference instead. This way the
4289 excessive ";" marker prematurely stops the parameters parsing. */
4291 complaint (&symfile_complaints
, _("Invalid (empty) method arguments"));
4294 else if (TYPE_CODE (types
[n
- 1]) != TYPE_CODE_VOID
)
4302 rval
= XCNEWVEC (struct field
, n
);
4303 for (i
= 0; i
< n
; i
++)
4304 rval
[i
].type
= types
[i
];
4309 /* Common block handling. */
4311 /* List of symbols declared since the last BCOMM. This list is a tail
4312 of local_symbols. When ECOMM is seen, the symbols on the list
4313 are noted so their proper addresses can be filled in later,
4314 using the common block base address gotten from the assembler
4317 static struct pending
*common_block
;
4318 static int common_block_i
;
4320 /* Name of the current common block. We get it from the BCOMM instead of the
4321 ECOMM to match IBM documentation (even though IBM puts the name both places
4322 like everyone else). */
4323 static char *common_block_name
;
4325 /* Process a N_BCOMM symbol. The storage for NAME is not guaranteed
4326 to remain after this function returns. */
4329 common_block_start (char *name
, struct objfile
*objfile
)
4331 if (common_block_name
!= NULL
)
4333 complaint (&symfile_complaints
,
4334 _("Invalid symbol data: common block within common block"));
4336 common_block
= local_symbols
;
4337 common_block_i
= local_symbols
? local_symbols
->nsyms
: 0;
4338 common_block_name
= (char *) obstack_copy0 (&objfile
->objfile_obstack
, name
,
4342 /* Process a N_ECOMM symbol. */
4345 common_block_end (struct objfile
*objfile
)
4347 /* Symbols declared since the BCOMM are to have the common block
4348 start address added in when we know it. common_block and
4349 common_block_i point to the first symbol after the BCOMM in
4350 the local_symbols list; copy the list and hang it off the
4351 symbol for the common block name for later fixup. */
4354 struct pending
*newobj
= 0;
4355 struct pending
*next
;
4358 if (common_block_name
== NULL
)
4360 complaint (&symfile_complaints
, _("ECOMM symbol unmatched by BCOMM"));
4364 sym
= allocate_symbol (objfile
);
4365 /* Note: common_block_name already saved on objfile_obstack. */
4366 SYMBOL_SET_LINKAGE_NAME (sym
, common_block_name
);
4367 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
4369 /* Now we copy all the symbols which have been defined since the BCOMM. */
4371 /* Copy all the struct pendings before common_block. */
4372 for (next
= local_symbols
;
4373 next
!= NULL
&& next
!= common_block
;
4376 for (j
= 0; j
< next
->nsyms
; j
++)
4377 add_symbol_to_list (next
->symbol
[j
], &newobj
);
4380 /* Copy however much of COMMON_BLOCK we need. If COMMON_BLOCK is
4381 NULL, it means copy all the local symbols (which we already did
4384 if (common_block
!= NULL
)
4385 for (j
= common_block_i
; j
< common_block
->nsyms
; j
++)
4386 add_symbol_to_list (common_block
->symbol
[j
], &newobj
);
4388 SYMBOL_TYPE (sym
) = (struct type
*) newobj
;
4390 /* Should we be putting local_symbols back to what it was?
4393 i
= hashname (SYMBOL_LINKAGE_NAME (sym
));
4394 SYMBOL_VALUE_CHAIN (sym
) = global_sym_chain
[i
];
4395 global_sym_chain
[i
] = sym
;
4396 common_block_name
= NULL
;
4399 /* Add a common block's start address to the offset of each symbol
4400 declared to be in it (by being between a BCOMM/ECOMM pair that uses
4401 the common block name). */
4404 fix_common_block (struct symbol
*sym
, CORE_ADDR valu
)
4406 struct pending
*next
= (struct pending
*) SYMBOL_TYPE (sym
);
4408 for (; next
; next
= next
->next
)
4412 for (j
= next
->nsyms
- 1; j
>= 0; j
--)
4413 SYMBOL_VALUE_ADDRESS (next
->symbol
[j
]) += valu
;
4419 /* Add {TYPE, TYPENUMS} to the NONAME_UNDEFS vector.
4420 See add_undefined_type for more details. */
4423 add_undefined_type_noname (struct type
*type
, int typenums
[2])
4427 nat
.typenums
[0] = typenums
[0];
4428 nat
.typenums
[1] = typenums
[1];
4431 if (noname_undefs_length
== noname_undefs_allocated
)
4433 noname_undefs_allocated
*= 2;
4434 noname_undefs
= (struct nat
*)
4435 xrealloc ((char *) noname_undefs
,
4436 noname_undefs_allocated
* sizeof (struct nat
));
4438 noname_undefs
[noname_undefs_length
++] = nat
;
4441 /* Add TYPE to the UNDEF_TYPES vector.
4442 See add_undefined_type for more details. */
4445 add_undefined_type_1 (struct type
*type
)
4447 if (undef_types_length
== undef_types_allocated
)
4449 undef_types_allocated
*= 2;
4450 undef_types
= (struct type
**)
4451 xrealloc ((char *) undef_types
,
4452 undef_types_allocated
* sizeof (struct type
*));
4454 undef_types
[undef_types_length
++] = type
;
4457 /* What about types defined as forward references inside of a small lexical
4459 /* Add a type to the list of undefined types to be checked through
4460 once this file has been read in.
4462 In practice, we actually maintain two such lists: The first list
4463 (UNDEF_TYPES) is used for types whose name has been provided, and
4464 concerns forward references (eg 'xs' or 'xu' forward references);
4465 the second list (NONAME_UNDEFS) is used for types whose name is
4466 unknown at creation time, because they were referenced through
4467 their type number before the actual type was declared.
4468 This function actually adds the given type to the proper list. */
4471 add_undefined_type (struct type
*type
, int typenums
[2])
4473 if (TYPE_TAG_NAME (type
) == NULL
)
4474 add_undefined_type_noname (type
, typenums
);
4476 add_undefined_type_1 (type
);
4479 /* Try to fix all undefined types pushed on the UNDEF_TYPES vector. */
4482 cleanup_undefined_types_noname (struct objfile
*objfile
)
4486 for (i
= 0; i
< noname_undefs_length
; i
++)
4488 struct nat nat
= noname_undefs
[i
];
4491 type
= dbx_lookup_type (nat
.typenums
, objfile
);
4492 if (nat
.type
!= *type
&& TYPE_CODE (*type
) != TYPE_CODE_UNDEF
)
4494 /* The instance flags of the undefined type are still unset,
4495 and needs to be copied over from the reference type.
4496 Since replace_type expects them to be identical, we need
4497 to set these flags manually before hand. */
4498 TYPE_INSTANCE_FLAGS (nat
.type
) = TYPE_INSTANCE_FLAGS (*type
);
4499 replace_type (nat
.type
, *type
);
4503 noname_undefs_length
= 0;
4506 /* Go through each undefined type, see if it's still undefined, and fix it
4507 up if possible. We have two kinds of undefined types:
4509 TYPE_CODE_ARRAY: Array whose target type wasn't defined yet.
4510 Fix: update array length using the element bounds
4511 and the target type's length.
4512 TYPE_CODE_STRUCT, TYPE_CODE_UNION: Structure whose fields were not
4513 yet defined at the time a pointer to it was made.
4514 Fix: Do a full lookup on the struct/union tag. */
4517 cleanup_undefined_types_1 (void)
4521 /* Iterate over every undefined type, and look for a symbol whose type
4522 matches our undefined type. The symbol matches if:
4523 1. It is a typedef in the STRUCT domain;
4524 2. It has the same name, and same type code;
4525 3. The instance flags are identical.
4527 It is important to check the instance flags, because we have seen
4528 examples where the debug info contained definitions such as:
4530 "foo_t:t30=B31=xefoo_t:"
4532 In this case, we have created an undefined type named "foo_t" whose
4533 instance flags is null (when processing "xefoo_t"), and then created
4534 another type with the same name, but with different instance flags
4535 ('B' means volatile). I think that the definition above is wrong,
4536 since the same type cannot be volatile and non-volatile at the same
4537 time, but we need to be able to cope with it when it happens. The
4538 approach taken here is to treat these two types as different. */
4540 for (type
= undef_types
; type
< undef_types
+ undef_types_length
; type
++)
4542 switch (TYPE_CODE (*type
))
4545 case TYPE_CODE_STRUCT
:
4546 case TYPE_CODE_UNION
:
4547 case TYPE_CODE_ENUM
:
4549 /* Check if it has been defined since. Need to do this here
4550 as well as in check_typedef to deal with the (legitimate in
4551 C though not C++) case of several types with the same name
4552 in different source files. */
4553 if (TYPE_STUB (*type
))
4555 struct pending
*ppt
;
4557 /* Name of the type, without "struct" or "union". */
4558 const char *type_name
= TYPE_TAG_NAME (*type
);
4560 if (type_name
== NULL
)
4562 complaint (&symfile_complaints
, _("need a type name"));
4565 for (ppt
= file_symbols
; ppt
; ppt
= ppt
->next
)
4567 for (i
= 0; i
< ppt
->nsyms
; i
++)
4569 struct symbol
*sym
= ppt
->symbol
[i
];
4571 if (SYMBOL_CLASS (sym
) == LOC_TYPEDEF
4572 && SYMBOL_DOMAIN (sym
) == STRUCT_DOMAIN
4573 && (TYPE_CODE (SYMBOL_TYPE (sym
)) ==
4575 && (TYPE_INSTANCE_FLAGS (*type
) ==
4576 TYPE_INSTANCE_FLAGS (SYMBOL_TYPE (sym
)))
4577 && strcmp (SYMBOL_LINKAGE_NAME (sym
),
4579 replace_type (*type
, SYMBOL_TYPE (sym
));
4588 complaint (&symfile_complaints
,
4589 _("forward-referenced types left unresolved, "
4597 undef_types_length
= 0;
4600 /* Try to fix all the undefined types we ecountered while processing
4604 cleanup_undefined_stabs_types (struct objfile
*objfile
)
4606 cleanup_undefined_types_1 ();
4607 cleanup_undefined_types_noname (objfile
);
4610 /* Scan through all of the global symbols defined in the object file,
4611 assigning values to the debugging symbols that need to be assigned
4612 to. Get these symbols from the minimal symbol table. */
4615 scan_file_globals (struct objfile
*objfile
)
4618 struct minimal_symbol
*msymbol
;
4619 struct symbol
*sym
, *prev
;
4620 struct objfile
*resolve_objfile
;
4622 /* SVR4 based linkers copy referenced global symbols from shared
4623 libraries to the main executable.
4624 If we are scanning the symbols for a shared library, try to resolve
4625 them from the minimal symbols of the main executable first. */
4627 if (symfile_objfile
&& objfile
!= symfile_objfile
)
4628 resolve_objfile
= symfile_objfile
;
4630 resolve_objfile
= objfile
;
4634 /* Avoid expensive loop through all minimal symbols if there are
4635 no unresolved symbols. */
4636 for (hash
= 0; hash
< HASHSIZE
; hash
++)
4638 if (global_sym_chain
[hash
])
4641 if (hash
>= HASHSIZE
)
4644 ALL_OBJFILE_MSYMBOLS (resolve_objfile
, msymbol
)
4648 /* Skip static symbols. */
4649 switch (MSYMBOL_TYPE (msymbol
))
4661 /* Get the hash index and check all the symbols
4662 under that hash index. */
4664 hash
= hashname (MSYMBOL_LINKAGE_NAME (msymbol
));
4666 for (sym
= global_sym_chain
[hash
]; sym
;)
4668 if (strcmp (MSYMBOL_LINKAGE_NAME (msymbol
),
4669 SYMBOL_LINKAGE_NAME (sym
)) == 0)
4671 /* Splice this symbol out of the hash chain and
4672 assign the value we have to it. */
4675 SYMBOL_VALUE_CHAIN (prev
) = SYMBOL_VALUE_CHAIN (sym
);
4679 global_sym_chain
[hash
] = SYMBOL_VALUE_CHAIN (sym
);
4682 /* Check to see whether we need to fix up a common block. */
4683 /* Note: this code might be executed several times for
4684 the same symbol if there are multiple references. */
4687 if (SYMBOL_CLASS (sym
) == LOC_BLOCK
)
4689 fix_common_block (sym
,
4690 MSYMBOL_VALUE_ADDRESS (resolve_objfile
,
4695 SYMBOL_VALUE_ADDRESS (sym
)
4696 = MSYMBOL_VALUE_ADDRESS (resolve_objfile
, msymbol
);
4698 SYMBOL_SECTION (sym
) = MSYMBOL_SECTION (msymbol
);
4703 sym
= SYMBOL_VALUE_CHAIN (prev
);
4707 sym
= global_sym_chain
[hash
];
4713 sym
= SYMBOL_VALUE_CHAIN (sym
);
4717 if (resolve_objfile
== objfile
)
4719 resolve_objfile
= objfile
;
4722 /* Change the storage class of any remaining unresolved globals to
4723 LOC_UNRESOLVED and remove them from the chain. */
4724 for (hash
= 0; hash
< HASHSIZE
; hash
++)
4726 sym
= global_sym_chain
[hash
];
4730 sym
= SYMBOL_VALUE_CHAIN (sym
);
4732 /* Change the symbol address from the misleading chain value
4734 SYMBOL_VALUE_ADDRESS (prev
) = 0;
4736 /* Complain about unresolved common block symbols. */
4737 if (SYMBOL_CLASS (prev
) == LOC_STATIC
)
4738 SYMBOL_ACLASS_INDEX (prev
) = LOC_UNRESOLVED
;
4740 complaint (&symfile_complaints
,
4741 _("%s: common block `%s' from "
4742 "global_sym_chain unresolved"),
4743 objfile_name (objfile
), SYMBOL_PRINT_NAME (prev
));
4746 memset (global_sym_chain
, 0, sizeof (global_sym_chain
));
4749 /* Initialize anything that needs initializing when starting to read
4750 a fresh piece of a symbol file, e.g. reading in the stuff corresponding
4754 stabsread_init (void)
4758 /* Initialize anything that needs initializing when a completely new
4759 symbol file is specified (not just adding some symbols from another
4760 file, e.g. a shared library). */
4763 stabsread_new_init (void)
4765 /* Empty the hash table of global syms looking for values. */
4766 memset (global_sym_chain
, 0, sizeof (global_sym_chain
));
4769 /* Initialize anything that needs initializing at the same time as
4770 start_symtab() is called. */
4775 global_stabs
= NULL
; /* AIX COFF */
4776 /* Leave FILENUM of 0 free for builtin types and this file's types. */
4777 n_this_object_header_files
= 1;
4778 type_vector_length
= 0;
4779 type_vector
= (struct type
**) 0;
4781 /* FIXME: If common_block_name is not already NULL, we should complain(). */
4782 common_block_name
= NULL
;
4785 /* Call after end_symtab(). */
4792 xfree (type_vector
);
4795 type_vector_length
= 0;
4796 previous_stab_code
= 0;
4800 finish_global_stabs (struct objfile
*objfile
)
4804 patch_block_stabs (global_symbols
, global_stabs
, objfile
);
4805 xfree (global_stabs
);
4806 global_stabs
= NULL
;
4810 /* Find the end of the name, delimited by a ':', but don't match
4811 ObjC symbols which look like -[Foo bar::]:bla. */
4813 find_name_end (char *name
)
4817 if (s
[0] == '-' || *s
== '+')
4819 /* Must be an ObjC method symbol. */
4822 error (_("invalid symbol name \"%s\""), name
);
4824 s
= strchr (s
, ']');
4827 error (_("invalid symbol name \"%s\""), name
);
4829 return strchr (s
, ':');
4833 return strchr (s
, ':');
4837 /* Initializer for this module. */
4840 _initialize_stabsread (void)
4842 rs6000_builtin_type_data
= register_objfile_data ();
4844 undef_types_allocated
= 20;
4845 undef_types_length
= 0;
4846 undef_types
= XNEWVEC (struct type
*, undef_types_allocated
);
4848 noname_undefs_allocated
= 20;
4849 noname_undefs_length
= 0;
4850 noname_undefs
= XNEWVEC (struct nat
, noname_undefs_allocated
);
4852 stab_register_index
= register_symbol_register_impl (LOC_REGISTER
,
4853 &stab_register_funcs
);
4854 stab_regparm_index
= register_symbol_register_impl (LOC_REGPARM_ADDR
,
4855 &stab_register_funcs
);