1 /* Support routines for decoding "stabs" debugging information format.
3 Copyright (C) 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995,
4 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007,
5 2008 Free Software Foundation, Inc.
7 This file is part of GDB.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program. If not, see <http://www.gnu.org/licenses/>. */
22 /* Support routines for reading and decoding debugging information in
23 the "stabs" format. This format is used with many systems that use
24 the a.out object file format, as well as some systems that use
25 COFF or ELF where the stabs data is placed in a special section.
26 Avoid placing any object file format specific code in this file. */
29 #include "gdb_string.h"
31 #include "gdb_obstack.h"
34 #include "expression.h"
37 #include "aout/stab_gnu.h" /* We always use GNU stabs, not native */
39 #include "aout/aout64.h"
40 #include "gdb-stabs.h"
42 #include "complaints.h"
47 #include "cp-support.h"
48 #include "gdb_assert.h"
52 /* Ask stabsread.h to define the vars it normally declares `extern'. */
55 #include "stabsread.h" /* Our own declarations */
58 extern void _initialize_stabsread (void);
60 /* The routines that read and process a complete stabs for a C struct or
61 C++ class pass lists of data member fields and lists of member function
62 fields in an instance of a field_info structure, as defined below.
63 This is part of some reorganization of low level C++ support and is
64 expected to eventually go away... (FIXME) */
70 struct nextfield
*next
;
72 /* This is the raw visibility from the stab. It is not checked
73 for being one of the visibilities we recognize, so code which
74 examines this field better be able to deal. */
80 struct next_fnfieldlist
82 struct next_fnfieldlist
*next
;
83 struct fn_fieldlist fn_fieldlist
;
89 read_one_struct_field (struct field_info
*, char **, char *,
90 struct type
*, struct objfile
*);
92 static struct type
*dbx_alloc_type (int[2], struct objfile
*);
94 static long read_huge_number (char **, int, int *, int);
96 static struct type
*error_type (char **, struct objfile
*);
99 patch_block_stabs (struct pending
*, struct pending_stabs
*,
102 static void fix_common_block (struct symbol
*, int);
104 static int read_type_number (char **, int *);
106 static struct type
*read_type (char **, struct objfile
*);
108 static struct type
*read_range_type (char **, int[2], int, struct objfile
*);
110 static struct type
*read_sun_builtin_type (char **, int[2], struct objfile
*);
112 static struct type
*read_sun_floating_type (char **, int[2],
115 static struct type
*read_enum_type (char **, struct type
*, struct objfile
*);
117 static struct type
*rs6000_builtin_type (int);
120 read_member_functions (struct field_info
*, char **, struct type
*,
124 read_struct_fields (struct field_info
*, char **, struct type
*,
128 read_baseclasses (struct field_info
*, char **, struct type
*,
132 read_tilde_fields (struct field_info
*, char **, struct type
*,
135 static int attach_fn_fields_to_type (struct field_info
*, struct type
*);
137 static int attach_fields_to_type (struct field_info
*, struct type
*,
140 static struct type
*read_struct_type (char **, struct type
*,
144 static struct type
*read_array_type (char **, struct type
*,
147 static struct field
*read_args (char **, int, struct objfile
*, int *, int *);
149 static void add_undefined_type (struct type
*, int[2]);
152 read_cpp_abbrev (struct field_info
*, char **, struct type
*,
155 static char *find_name_end (char *name
);
157 static int process_reference (char **string
);
159 void stabsread_clear_cache (void);
161 static const char vptr_name
[] = "_vptr$";
162 static const char vb_name
[] = "_vb$";
165 invalid_cpp_abbrev_complaint (const char *arg1
)
167 complaint (&symfile_complaints
, _("invalid C++ abbreviation `%s'"), arg1
);
171 reg_value_complaint (int regnum
, int num_regs
, const char *sym
)
173 complaint (&symfile_complaints
,
174 _("register number %d too large (max %d) in symbol %s"),
175 regnum
, num_regs
- 1, sym
);
179 stabs_general_complaint (const char *arg1
)
181 complaint (&symfile_complaints
, "%s", arg1
);
184 /* Make a list of forward references which haven't been defined. */
186 static struct type
**undef_types
;
187 static int undef_types_allocated
;
188 static int undef_types_length
;
189 static struct symbol
*current_symbol
= NULL
;
191 /* Make a list of nameless types that are undefined.
192 This happens when another type is referenced by its number
193 before this type is actually defined. For instance "t(0,1)=k(0,2)"
194 and type (0,2) is defined only later. */
201 static struct nat
*noname_undefs
;
202 static int noname_undefs_allocated
;
203 static int noname_undefs_length
;
205 /* Check for and handle cretinous stabs symbol name continuation! */
206 #define STABS_CONTINUE(pp,objfile) \
208 if (**(pp) == '\\' || (**(pp) == '?' && (*(pp))[1] == '\0')) \
209 *(pp) = next_symbol_text (objfile); \
213 /* Look up a dbx type-number pair. Return the address of the slot
214 where the type for that number-pair is stored.
215 The number-pair is in TYPENUMS.
217 This can be used for finding the type associated with that pair
218 or for associating a new type with the pair. */
220 static struct type
**
221 dbx_lookup_type (int typenums
[2])
223 int filenum
= typenums
[0];
224 int index
= typenums
[1];
227 struct header_file
*f
;
230 if (filenum
== -1) /* -1,-1 is for temporary types. */
233 if (filenum
< 0 || filenum
>= n_this_object_header_files
)
235 complaint (&symfile_complaints
,
236 _("Invalid symbol data: type number (%d,%d) out of range at symtab pos %d."),
237 filenum
, index
, symnum
);
245 /* Caller wants address of address of type. We think
246 that negative (rs6k builtin) types will never appear as
247 "lvalues", (nor should they), so we stuff the real type
248 pointer into a temp, and return its address. If referenced,
249 this will do the right thing. */
250 static struct type
*temp_type
;
252 temp_type
= rs6000_builtin_type (index
);
256 /* Type is defined outside of header files.
257 Find it in this object file's type vector. */
258 if (index
>= type_vector_length
)
260 old_len
= type_vector_length
;
263 type_vector_length
= INITIAL_TYPE_VECTOR_LENGTH
;
264 type_vector
= (struct type
**)
265 xmalloc (type_vector_length
* sizeof (struct type
*));
267 while (index
>= type_vector_length
)
269 type_vector_length
*= 2;
271 type_vector
= (struct type
**)
272 xrealloc ((char *) type_vector
,
273 (type_vector_length
* sizeof (struct type
*)));
274 memset (&type_vector
[old_len
], 0,
275 (type_vector_length
- old_len
) * sizeof (struct type
*));
277 return (&type_vector
[index
]);
281 real_filenum
= this_object_header_files
[filenum
];
283 if (real_filenum
>= N_HEADER_FILES (current_objfile
))
285 static struct type
**temp_type_p
;
287 warning (_("GDB internal error: bad real_filenum"));
290 temp_type_p
= &builtin_type_error
;
294 f
= HEADER_FILES (current_objfile
) + real_filenum
;
296 f_orig_length
= f
->length
;
297 if (index
>= f_orig_length
)
299 while (index
>= f
->length
)
303 f
->vector
= (struct type
**)
304 xrealloc ((char *) f
->vector
, f
->length
* sizeof (struct type
*));
305 memset (&f
->vector
[f_orig_length
], 0,
306 (f
->length
- f_orig_length
) * sizeof (struct type
*));
308 return (&f
->vector
[index
]);
312 /* Make sure there is a type allocated for type numbers TYPENUMS
313 and return the type object.
314 This can create an empty (zeroed) type object.
315 TYPENUMS may be (-1, -1) to return a new type object that is not
316 put into the type vector, and so may not be referred to by number. */
319 dbx_alloc_type (int typenums
[2], struct objfile
*objfile
)
321 struct type
**type_addr
;
323 if (typenums
[0] == -1)
325 return (alloc_type (objfile
));
328 type_addr
= dbx_lookup_type (typenums
);
330 /* If we are referring to a type not known at all yet,
331 allocate an empty type for it.
332 We will fill it in later if we find out how. */
335 *type_addr
= alloc_type (objfile
);
341 /* for all the stabs in a given stab vector, build appropriate types
342 and fix their symbols in given symbol vector. */
345 patch_block_stabs (struct pending
*symbols
, struct pending_stabs
*stabs
,
346 struct objfile
*objfile
)
356 /* for all the stab entries, find their corresponding symbols and
357 patch their types! */
359 for (ii
= 0; ii
< stabs
->count
; ++ii
)
361 name
= stabs
->stab
[ii
];
362 pp
= (char *) strchr (name
, ':');
363 gdb_assert (pp
); /* Must find a ':' or game's over. */
367 pp
= (char *) strchr (pp
, ':');
369 sym
= find_symbol_in_list (symbols
, name
, pp
- name
);
372 /* FIXME-maybe: it would be nice if we noticed whether
373 the variable was defined *anywhere*, not just whether
374 it is defined in this compilation unit. But neither
375 xlc or GCC seem to need such a definition, and until
376 we do psymtabs (so that the minimal symbols from all
377 compilation units are available now), I'm not sure
378 how to get the information. */
380 /* On xcoff, if a global is defined and never referenced,
381 ld will remove it from the executable. There is then
382 a N_GSYM stab for it, but no regular (C_EXT) symbol. */
383 sym
= (struct symbol
*)
384 obstack_alloc (&objfile
->objfile_obstack
,
385 sizeof (struct symbol
));
387 memset (sym
, 0, sizeof (struct symbol
));
388 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
389 SYMBOL_CLASS (sym
) = LOC_OPTIMIZED_OUT
;
390 DEPRECATED_SYMBOL_NAME (sym
) =
391 obsavestring (name
, pp
- name
, &objfile
->objfile_obstack
);
393 if (*(pp
- 1) == 'F' || *(pp
- 1) == 'f')
395 /* I don't think the linker does this with functions,
396 so as far as I know this is never executed.
397 But it doesn't hurt to check. */
399 lookup_function_type (read_type (&pp
, objfile
));
403 SYMBOL_TYPE (sym
) = read_type (&pp
, objfile
);
405 add_symbol_to_list (sym
, &global_symbols
);
410 if (*(pp
- 1) == 'F' || *(pp
- 1) == 'f')
413 lookup_function_type (read_type (&pp
, objfile
));
417 SYMBOL_TYPE (sym
) = read_type (&pp
, objfile
);
425 /* Read a number by which a type is referred to in dbx data,
426 or perhaps read a pair (FILENUM, TYPENUM) in parentheses.
427 Just a single number N is equivalent to (0,N).
428 Return the two numbers by storing them in the vector TYPENUMS.
429 TYPENUMS will then be used as an argument to dbx_lookup_type.
431 Returns 0 for success, -1 for error. */
434 read_type_number (char **pp
, int *typenums
)
440 typenums
[0] = read_huge_number (pp
, ',', &nbits
, 0);
443 typenums
[1] = read_huge_number (pp
, ')', &nbits
, 0);
450 typenums
[1] = read_huge_number (pp
, 0, &nbits
, 0);
458 #define VISIBILITY_PRIVATE '0' /* Stabs character for private field */
459 #define VISIBILITY_PROTECTED '1' /* Stabs character for protected fld */
460 #define VISIBILITY_PUBLIC '2' /* Stabs character for public field */
461 #define VISIBILITY_IGNORE '9' /* Optimized out or zero length */
463 /* Structure for storing pointers to reference definitions for fast lookup
464 during "process_later". */
473 #define MAX_CHUNK_REFS 100
474 #define REF_CHUNK_SIZE (MAX_CHUNK_REFS * sizeof (struct ref_map))
475 #define REF_MAP_SIZE(ref_chunk) ((ref_chunk) * REF_CHUNK_SIZE)
477 static struct ref_map
*ref_map
;
479 /* Ptr to free cell in chunk's linked list. */
480 static int ref_count
= 0;
482 /* Number of chunks malloced. */
483 static int ref_chunk
= 0;
485 /* This file maintains a cache of stabs aliases found in the symbol
486 table. If the symbol table changes, this cache must be cleared
487 or we are left holding onto data in invalid obstacks. */
489 stabsread_clear_cache (void)
495 /* Create array of pointers mapping refids to symbols and stab strings.
496 Add pointers to reference definition symbols and/or their values as we
497 find them, using their reference numbers as our index.
498 These will be used later when we resolve references. */
500 ref_add (int refnum
, struct symbol
*sym
, char *stabs
, CORE_ADDR value
)
504 if (refnum
>= ref_count
)
505 ref_count
= refnum
+ 1;
506 if (ref_count
> ref_chunk
* MAX_CHUNK_REFS
)
508 int new_slots
= ref_count
- ref_chunk
* MAX_CHUNK_REFS
;
509 int new_chunks
= new_slots
/ MAX_CHUNK_REFS
+ 1;
510 ref_map
= (struct ref_map
*)
511 xrealloc (ref_map
, REF_MAP_SIZE (ref_chunk
+ new_chunks
));
512 memset (ref_map
+ ref_chunk
* MAX_CHUNK_REFS
, 0, new_chunks
* REF_CHUNK_SIZE
);
513 ref_chunk
+= new_chunks
;
515 ref_map
[refnum
].stabs
= stabs
;
516 ref_map
[refnum
].sym
= sym
;
517 ref_map
[refnum
].value
= value
;
520 /* Return defined sym for the reference REFNUM. */
522 ref_search (int refnum
)
524 if (refnum
< 0 || refnum
> ref_count
)
526 return ref_map
[refnum
].sym
;
529 /* Parse a reference id in STRING and return the resulting
530 reference number. Move STRING beyond the reference id. */
533 process_reference (char **string
)
541 /* Advance beyond the initial '#'. */
544 /* Read number as reference id. */
545 while (*p
&& isdigit (*p
))
547 refnum
= refnum
* 10 + *p
- '0';
554 /* If STRING defines a reference, store away a pointer to the reference
555 definition for later use. Return the reference number. */
558 symbol_reference_defined (char **string
)
563 refnum
= process_reference (&p
);
565 /* Defining symbols end in '=' */
568 /* Symbol is being defined here. */
574 /* Must be a reference. Either the symbol has already been defined,
575 or this is a forward reference to it. */
582 define_symbol (CORE_ADDR valu
, char *string
, int desc
, int type
,
583 struct objfile
*objfile
)
585 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
587 char *p
= (char *) find_name_end (string
);
592 /* We would like to eliminate nameless symbols, but keep their types.
593 E.g. stab entry ":t10=*2" should produce a type 10, which is a pointer
594 to type 2, but, should not create a symbol to address that type. Since
595 the symbol will be nameless, there is no way any user can refer to it. */
599 /* Ignore syms with empty names. */
603 /* Ignore old-style symbols from cc -go */
613 /* If a nameless stab entry, all we need is the type, not the symbol.
614 e.g. ":t10=*2" or a nameless enum like " :T16=ered:0,green:1,blue:2,;" */
615 nameless
= (p
== string
|| ((string
[0] == ' ') && (string
[1] == ':')));
617 current_symbol
= sym
= (struct symbol
*)
618 obstack_alloc (&objfile
->objfile_obstack
, sizeof (struct symbol
));
619 memset (sym
, 0, sizeof (struct symbol
));
621 switch (type
& N_TYPE
)
624 SYMBOL_SECTION (sym
) = SECT_OFF_TEXT (objfile
);
627 SYMBOL_SECTION (sym
) = SECT_OFF_DATA (objfile
);
630 SYMBOL_SECTION (sym
) = SECT_OFF_BSS (objfile
);
634 if (processing_gcc_compilation
)
636 /* GCC 2.x puts the line number in desc. SunOS apparently puts in the
637 number of bytes occupied by a type or object, which we ignore. */
638 SYMBOL_LINE (sym
) = desc
;
642 SYMBOL_LINE (sym
) = 0; /* unknown */
645 if (is_cplus_marker (string
[0]))
647 /* Special GNU C++ names. */
651 DEPRECATED_SYMBOL_NAME (sym
) = obsavestring ("this", strlen ("this"),
652 &objfile
->objfile_obstack
);
655 case 'v': /* $vtbl_ptr_type */
656 /* Was: DEPRECATED_SYMBOL_NAME (sym) = "vptr"; */
660 DEPRECATED_SYMBOL_NAME (sym
) = obsavestring ("eh_throw", strlen ("eh_throw"),
661 &objfile
->objfile_obstack
);
665 /* This was an anonymous type that was never fixed up. */
669 /* SunPRO (3.0 at least) static variable encoding. */
670 if (gdbarch_static_transform_name_p (gdbarch
))
672 /* ... fall through ... */
675 complaint (&symfile_complaints
, _("Unknown C++ symbol name `%s'"),
677 goto normal
; /* Do *something* with it */
683 SYMBOL_LANGUAGE (sym
) = current_subfile
->language
;
684 SYMBOL_SET_NAMES (sym
, string
, p
- string
, objfile
);
688 /* Determine the type of name being defined. */
690 /* Getting GDB to correctly skip the symbol on an undefined symbol
691 descriptor and not ever dump core is a very dodgy proposition if
692 we do things this way. I say the acorn RISC machine can just
693 fix their compiler. */
694 /* The Acorn RISC machine's compiler can put out locals that don't
695 start with "234=" or "(3,4)=", so assume anything other than the
696 deftypes we know how to handle is a local. */
697 if (!strchr ("cfFGpPrStTvVXCR", *p
))
699 if (isdigit (*p
) || *p
== '(' || *p
== '-')
708 /* c is a special case, not followed by a type-number.
709 SYMBOL:c=iVALUE for an integer constant symbol.
710 SYMBOL:c=rVALUE for a floating constant symbol.
711 SYMBOL:c=eTYPE,INTVALUE for an enum constant symbol.
712 e.g. "b:c=e6,0" for "const b = blob1"
713 (where type 6 is defined by "blobs:t6=eblob1:0,blob2:1,;"). */
716 SYMBOL_CLASS (sym
) = LOC_CONST
;
717 SYMBOL_TYPE (sym
) = error_type (&p
, objfile
);
718 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
719 add_symbol_to_list (sym
, &file_symbols
);
729 struct type
*dbl_type
;
731 /* FIXME-if-picky-about-floating-accuracy: Should be using
732 target arithmetic to get the value. real.c in GCC
733 probably has the necessary code. */
735 dbl_type
= builtin_type (gdbarch
)->builtin_double
;
737 obstack_alloc (&objfile
->objfile_obstack
,
738 TYPE_LENGTH (dbl_type
));
739 store_typed_floating (dbl_valu
, dbl_type
, d
);
741 SYMBOL_TYPE (sym
) = dbl_type
;
742 SYMBOL_VALUE_BYTES (sym
) = dbl_valu
;
743 SYMBOL_CLASS (sym
) = LOC_CONST_BYTES
;
748 /* Defining integer constants this way is kind of silly,
749 since 'e' constants allows the compiler to give not
750 only the value, but the type as well. C has at least
751 int, long, unsigned int, and long long as constant
752 types; other languages probably should have at least
753 unsigned as well as signed constants. */
755 SYMBOL_TYPE (sym
) = builtin_type (gdbarch
)->builtin_long
;
756 SYMBOL_VALUE (sym
) = atoi (p
);
757 SYMBOL_CLASS (sym
) = LOC_CONST
;
761 /* SYMBOL:c=eTYPE,INTVALUE for a constant symbol whose value
762 can be represented as integral.
763 e.g. "b:c=e6,0" for "const b = blob1"
764 (where type 6 is defined by "blobs:t6=eblob1:0,blob2:1,;"). */
766 SYMBOL_CLASS (sym
) = LOC_CONST
;
767 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
771 SYMBOL_TYPE (sym
) = error_type (&p
, objfile
);
776 /* If the value is too big to fit in an int (perhaps because
777 it is unsigned), or something like that, we silently get
778 a bogus value. The type and everything else about it is
779 correct. Ideally, we should be using whatever we have
780 available for parsing unsigned and long long values,
782 SYMBOL_VALUE (sym
) = atoi (p
);
787 SYMBOL_CLASS (sym
) = LOC_CONST
;
788 SYMBOL_TYPE (sym
) = error_type (&p
, objfile
);
791 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
792 add_symbol_to_list (sym
, &file_symbols
);
796 /* The name of a caught exception. */
797 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
798 SYMBOL_CLASS (sym
) = LOC_LABEL
;
799 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
800 SYMBOL_VALUE_ADDRESS (sym
) = valu
;
801 add_symbol_to_list (sym
, &local_symbols
);
805 /* A static function definition. */
806 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
807 SYMBOL_CLASS (sym
) = LOC_BLOCK
;
808 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
809 add_symbol_to_list (sym
, &file_symbols
);
810 /* fall into process_function_types. */
812 process_function_types
:
813 /* Function result types are described as the result type in stabs.
814 We need to convert this to the function-returning-type-X type
815 in GDB. E.g. "int" is converted to "function returning int". */
816 if (TYPE_CODE (SYMBOL_TYPE (sym
)) != TYPE_CODE_FUNC
)
817 SYMBOL_TYPE (sym
) = lookup_function_type (SYMBOL_TYPE (sym
));
819 /* All functions in C++ have prototypes. Stabs does not offer an
820 explicit way to identify prototyped or unprototyped functions,
821 but both GCC and Sun CC emit stabs for the "call-as" type rather
822 than the "declared-as" type for unprototyped functions, so
823 we treat all functions as if they were prototyped. This is used
824 primarily for promotion when calling the function from GDB. */
825 TYPE_FLAGS (SYMBOL_TYPE (sym
)) |= TYPE_FLAG_PROTOTYPED
;
827 /* fall into process_prototype_types */
829 process_prototype_types
:
830 /* Sun acc puts declared types of arguments here. */
833 struct type
*ftype
= SYMBOL_TYPE (sym
);
838 /* Obtain a worst case guess for the number of arguments
839 by counting the semicolons. */
846 /* Allocate parameter information fields and fill them in. */
847 TYPE_FIELDS (ftype
) = (struct field
*)
848 TYPE_ALLOC (ftype
, nsemi
* sizeof (struct field
));
853 /* A type number of zero indicates the start of varargs.
854 FIXME: GDB currently ignores vararg functions. */
855 if (p
[0] == '0' && p
[1] == '\0')
857 ptype
= read_type (&p
, objfile
);
859 /* The Sun compilers mark integer arguments, which should
860 be promoted to the width of the calling conventions, with
861 a type which references itself. This type is turned into
862 a TYPE_CODE_VOID type by read_type, and we have to turn
863 it back into builtin_int here.
864 FIXME: Do we need a new builtin_promoted_int_arg ? */
865 if (TYPE_CODE (ptype
) == TYPE_CODE_VOID
)
866 ptype
= builtin_type (gdbarch
)->builtin_int
;
867 TYPE_FIELD_TYPE (ftype
, nparams
) = ptype
;
868 TYPE_FIELD_ARTIFICIAL (ftype
, nparams
++) = 0;
870 TYPE_NFIELDS (ftype
) = nparams
;
871 TYPE_FLAGS (ftype
) |= TYPE_FLAG_PROTOTYPED
;
876 /* A global function definition. */
877 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
878 SYMBOL_CLASS (sym
) = LOC_BLOCK
;
879 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
880 add_symbol_to_list (sym
, &global_symbols
);
881 goto process_function_types
;
884 /* For a class G (global) symbol, it appears that the
885 value is not correct. It is necessary to search for the
886 corresponding linker definition to find the value.
887 These definitions appear at the end of the namelist. */
888 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
889 SYMBOL_CLASS (sym
) = LOC_STATIC
;
890 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
891 /* Don't add symbol references to global_sym_chain.
892 Symbol references don't have valid names and wont't match up with
893 minimal symbols when the global_sym_chain is relocated.
894 We'll fixup symbol references when we fixup the defining symbol. */
895 if (DEPRECATED_SYMBOL_NAME (sym
) && DEPRECATED_SYMBOL_NAME (sym
)[0] != '#')
897 i
= hashname (DEPRECATED_SYMBOL_NAME (sym
));
898 SYMBOL_VALUE_CHAIN (sym
) = global_sym_chain
[i
];
899 global_sym_chain
[i
] = sym
;
901 add_symbol_to_list (sym
, &global_symbols
);
904 /* This case is faked by a conditional above,
905 when there is no code letter in the dbx data.
906 Dbx data never actually contains 'l'. */
909 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
910 SYMBOL_CLASS (sym
) = LOC_LOCAL
;
911 SYMBOL_VALUE (sym
) = valu
;
912 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
913 add_symbol_to_list (sym
, &local_symbols
);
918 /* pF is a two-letter code that means a function parameter in Fortran.
919 The type-number specifies the type of the return value.
920 Translate it into a pointer-to-function type. */
924 = lookup_pointer_type
925 (lookup_function_type (read_type (&p
, objfile
)));
928 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
930 SYMBOL_CLASS (sym
) = LOC_ARG
;
931 SYMBOL_VALUE (sym
) = valu
;
932 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
933 SYMBOL_IS_ARGUMENT (sym
) = 1;
934 add_symbol_to_list (sym
, &local_symbols
);
936 if (gdbarch_byte_order (gdbarch
) != BFD_ENDIAN_BIG
)
938 /* On little-endian machines, this crud is never necessary,
939 and, if the extra bytes contain garbage, is harmful. */
943 /* If it's gcc-compiled, if it says `short', believe it. */
944 if (processing_gcc_compilation
945 || gdbarch_believe_pcc_promotion (gdbarch
))
948 if (!gdbarch_believe_pcc_promotion (gdbarch
))
950 /* If PCC says a parameter is a short or a char, it is
952 if (TYPE_LENGTH (SYMBOL_TYPE (sym
))
953 < gdbarch_int_bit (gdbarch
) / TARGET_CHAR_BIT
954 && TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_INT
)
957 TYPE_UNSIGNED (SYMBOL_TYPE (sym
))
958 ? builtin_type (gdbarch
)->builtin_unsigned_int
959 : builtin_type (gdbarch
)->builtin_int
;
965 /* acc seems to use P to declare the prototypes of functions that
966 are referenced by this file. gdb is not prepared to deal
967 with this extra information. FIXME, it ought to. */
970 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
971 goto process_prototype_types
;
976 /* Parameter which is in a register. */
977 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
978 SYMBOL_CLASS (sym
) = LOC_REGISTER
;
979 SYMBOL_IS_ARGUMENT (sym
) = 1;
980 SYMBOL_VALUE (sym
) = gdbarch_stab_reg_to_regnum (current_gdbarch
, valu
);
981 if (SYMBOL_VALUE (sym
) >= gdbarch_num_regs (current_gdbarch
)
982 + gdbarch_num_pseudo_regs (current_gdbarch
))
984 reg_value_complaint (SYMBOL_VALUE (sym
),
985 gdbarch_num_regs (current_gdbarch
)
986 + gdbarch_num_pseudo_regs (current_gdbarch
),
987 SYMBOL_PRINT_NAME (sym
));
988 SYMBOL_VALUE (sym
) = gdbarch_sp_regnum (current_gdbarch
);
989 /* Known safe, though useless */
991 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
992 add_symbol_to_list (sym
, &local_symbols
);
996 /* Register variable (either global or local). */
997 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
998 SYMBOL_CLASS (sym
) = LOC_REGISTER
;
999 SYMBOL_VALUE (sym
) = gdbarch_stab_reg_to_regnum (current_gdbarch
, valu
);
1000 if (SYMBOL_VALUE (sym
) >= gdbarch_num_regs (current_gdbarch
)
1001 + gdbarch_num_pseudo_regs (current_gdbarch
))
1003 reg_value_complaint (SYMBOL_VALUE (sym
),
1004 gdbarch_num_regs (current_gdbarch
)
1005 + gdbarch_num_pseudo_regs (current_gdbarch
),
1006 SYMBOL_PRINT_NAME (sym
));
1007 SYMBOL_VALUE (sym
) = gdbarch_sp_regnum (current_gdbarch
);
1008 /* Known safe, though useless */
1010 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1011 if (within_function
)
1013 /* Sun cc uses a pair of symbols, one 'p' and one 'r', with
1014 the same name to represent an argument passed in a
1015 register. GCC uses 'P' for the same case. So if we find
1016 such a symbol pair we combine it into one 'P' symbol.
1017 For Sun cc we need to do this regardless of
1018 stabs_argument_has_addr, because the compiler puts out
1019 the 'p' symbol even if it never saves the argument onto
1022 On most machines, we want to preserve both symbols, so
1023 that we can still get information about what is going on
1024 with the stack (VAX for computing args_printed, using
1025 stack slots instead of saved registers in backtraces,
1028 Note that this code illegally combines
1029 main(argc) struct foo argc; { register struct foo argc; }
1030 but this case is considered pathological and causes a warning
1031 from a decent compiler. */
1034 && local_symbols
->nsyms
> 0
1035 && gdbarch_stabs_argument_has_addr (gdbarch
, SYMBOL_TYPE (sym
)))
1037 struct symbol
*prev_sym
;
1038 prev_sym
= local_symbols
->symbol
[local_symbols
->nsyms
- 1];
1039 if ((SYMBOL_CLASS (prev_sym
) == LOC_REF_ARG
1040 || SYMBOL_CLASS (prev_sym
) == LOC_ARG
)
1041 && strcmp (DEPRECATED_SYMBOL_NAME (prev_sym
),
1042 DEPRECATED_SYMBOL_NAME (sym
)) == 0)
1044 SYMBOL_CLASS (prev_sym
) = LOC_REGISTER
;
1045 /* Use the type from the LOC_REGISTER; that is the type
1046 that is actually in that register. */
1047 SYMBOL_TYPE (prev_sym
) = SYMBOL_TYPE (sym
);
1048 SYMBOL_VALUE (prev_sym
) = SYMBOL_VALUE (sym
);
1053 add_symbol_to_list (sym
, &local_symbols
);
1056 add_symbol_to_list (sym
, &file_symbols
);
1060 /* Static symbol at top level of file */
1061 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
1062 SYMBOL_CLASS (sym
) = LOC_STATIC
;
1063 SYMBOL_VALUE_ADDRESS (sym
) = valu
;
1064 if (gdbarch_static_transform_name_p (gdbarch
)
1065 && gdbarch_static_transform_name (gdbarch
,
1066 DEPRECATED_SYMBOL_NAME (sym
))
1067 != DEPRECATED_SYMBOL_NAME (sym
))
1069 struct minimal_symbol
*msym
;
1070 msym
= lookup_minimal_symbol (DEPRECATED_SYMBOL_NAME (sym
), NULL
, objfile
);
1073 DEPRECATED_SYMBOL_NAME (sym
) = gdbarch_static_transform_name
1075 DEPRECATED_SYMBOL_NAME (sym
));
1076 SYMBOL_VALUE_ADDRESS (sym
) = SYMBOL_VALUE_ADDRESS (msym
);
1079 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1080 add_symbol_to_list (sym
, &file_symbols
);
1084 /* In Ada, there is no distinction between typedef and non-typedef;
1085 any type declaration implicitly has the equivalent of a typedef,
1086 and thus 't' is in fact equivalent to 'Tt'.
1088 Therefore, for Ada units, we check the character immediately
1089 before the 't', and if we do not find a 'T', then make sure to
1090 create the associated symbol in the STRUCT_DOMAIN ('t' definitions
1091 will be stored in the VAR_DOMAIN). If the symbol was indeed
1092 defined as 'Tt' then the STRUCT_DOMAIN symbol will be created
1093 elsewhere, so we don't need to take care of that.
1095 This is important to do, because of forward references:
1096 The cleanup of undefined types stored in undef_types only uses
1097 STRUCT_DOMAIN symbols to perform the replacement. */
1098 synonym
= (SYMBOL_LANGUAGE (sym
) == language_ada
&& p
[-2] != 'T');
1101 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
1103 /* For a nameless type, we don't want a create a symbol, thus we
1104 did not use `sym'. Return without further processing. */
1108 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
1109 SYMBOL_VALUE (sym
) = valu
;
1110 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1111 /* C++ vagaries: we may have a type which is derived from
1112 a base type which did not have its name defined when the
1113 derived class was output. We fill in the derived class's
1114 base part member's name here in that case. */
1115 if (TYPE_NAME (SYMBOL_TYPE (sym
)) != NULL
)
1116 if ((TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_STRUCT
1117 || TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_UNION
)
1118 && TYPE_N_BASECLASSES (SYMBOL_TYPE (sym
)))
1121 for (j
= TYPE_N_BASECLASSES (SYMBOL_TYPE (sym
)) - 1; j
>= 0; j
--)
1122 if (TYPE_BASECLASS_NAME (SYMBOL_TYPE (sym
), j
) == 0)
1123 TYPE_BASECLASS_NAME (SYMBOL_TYPE (sym
), j
) =
1124 type_name_no_tag (TYPE_BASECLASS (SYMBOL_TYPE (sym
), j
));
1127 if (TYPE_NAME (SYMBOL_TYPE (sym
)) == NULL
)
1129 /* gcc-2.6 or later (when using -fvtable-thunks)
1130 emits a unique named type for a vtable entry.
1131 Some gdb code depends on that specific name. */
1132 extern const char vtbl_ptr_name
[];
1134 if ((TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_PTR
1135 && strcmp (DEPRECATED_SYMBOL_NAME (sym
), vtbl_ptr_name
))
1136 || TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_FUNC
)
1138 /* If we are giving a name to a type such as "pointer to
1139 foo" or "function returning foo", we better not set
1140 the TYPE_NAME. If the program contains "typedef char
1141 *caddr_t;", we don't want all variables of type char
1142 * to print as caddr_t. This is not just a
1143 consequence of GDB's type management; PCC and GCC (at
1144 least through version 2.4) both output variables of
1145 either type char * or caddr_t with the type number
1146 defined in the 't' symbol for caddr_t. If a future
1147 compiler cleans this up it GDB is not ready for it
1148 yet, but if it becomes ready we somehow need to
1149 disable this check (without breaking the PCC/GCC2.4
1154 Fortunately, this check seems not to be necessary
1155 for anything except pointers or functions. */
1156 /* ezannoni: 2000-10-26. This seems to apply for
1157 versions of gcc older than 2.8. This was the original
1158 problem: with the following code gdb would tell that
1159 the type for name1 is caddr_t, and func is char()
1160 typedef char *caddr_t;
1172 /* Pascal accepts names for pointer types. */
1173 if (current_subfile
->language
== language_pascal
)
1175 TYPE_NAME (SYMBOL_TYPE (sym
)) = DEPRECATED_SYMBOL_NAME (sym
);
1179 TYPE_NAME (SYMBOL_TYPE (sym
)) = DEPRECATED_SYMBOL_NAME (sym
);
1182 add_symbol_to_list (sym
, &file_symbols
);
1186 /* Create the STRUCT_DOMAIN clone. */
1187 struct symbol
*struct_sym
= (struct symbol
*)
1188 obstack_alloc (&objfile
->objfile_obstack
, sizeof (struct symbol
));
1191 SYMBOL_CLASS (struct_sym
) = LOC_TYPEDEF
;
1192 SYMBOL_VALUE (struct_sym
) = valu
;
1193 SYMBOL_DOMAIN (struct_sym
) = STRUCT_DOMAIN
;
1194 if (TYPE_NAME (SYMBOL_TYPE (sym
)) == 0)
1195 TYPE_NAME (SYMBOL_TYPE (sym
))
1196 = obconcat (&objfile
->objfile_obstack
, "", "",
1197 DEPRECATED_SYMBOL_NAME (sym
));
1198 add_symbol_to_list (struct_sym
, &file_symbols
);
1204 /* Struct, union, or enum tag. For GNU C++, this can be be followed
1205 by 't' which means we are typedef'ing it as well. */
1206 synonym
= *p
== 't';
1211 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
1213 /* For a nameless type, we don't want a create a symbol, thus we
1214 did not use `sym'. Return without further processing. */
1218 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
1219 SYMBOL_VALUE (sym
) = valu
;
1220 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
1221 if (TYPE_TAG_NAME (SYMBOL_TYPE (sym
)) == 0)
1222 TYPE_TAG_NAME (SYMBOL_TYPE (sym
))
1223 = obconcat (&objfile
->objfile_obstack
, "", "", DEPRECATED_SYMBOL_NAME (sym
));
1224 add_symbol_to_list (sym
, &file_symbols
);
1228 /* Clone the sym and then modify it. */
1229 struct symbol
*typedef_sym
= (struct symbol
*)
1230 obstack_alloc (&objfile
->objfile_obstack
, sizeof (struct symbol
));
1231 *typedef_sym
= *sym
;
1232 SYMBOL_CLASS (typedef_sym
) = LOC_TYPEDEF
;
1233 SYMBOL_VALUE (typedef_sym
) = valu
;
1234 SYMBOL_DOMAIN (typedef_sym
) = VAR_DOMAIN
;
1235 if (TYPE_NAME (SYMBOL_TYPE (sym
)) == 0)
1236 TYPE_NAME (SYMBOL_TYPE (sym
))
1237 = obconcat (&objfile
->objfile_obstack
, "", "", DEPRECATED_SYMBOL_NAME (sym
));
1238 add_symbol_to_list (typedef_sym
, &file_symbols
);
1243 /* Static symbol of local scope */
1244 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
1245 SYMBOL_CLASS (sym
) = LOC_STATIC
;
1246 SYMBOL_VALUE_ADDRESS (sym
) = valu
;
1247 if (gdbarch_static_transform_name_p (gdbarch
)
1248 && gdbarch_static_transform_name (gdbarch
,
1249 DEPRECATED_SYMBOL_NAME (sym
))
1250 != DEPRECATED_SYMBOL_NAME (sym
))
1252 struct minimal_symbol
*msym
;
1253 msym
= lookup_minimal_symbol (DEPRECATED_SYMBOL_NAME (sym
), NULL
, objfile
);
1256 DEPRECATED_SYMBOL_NAME (sym
) = gdbarch_static_transform_name
1258 DEPRECATED_SYMBOL_NAME (sym
));
1259 SYMBOL_VALUE_ADDRESS (sym
) = SYMBOL_VALUE_ADDRESS (msym
);
1262 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1263 add_symbol_to_list (sym
, &local_symbols
);
1267 /* Reference parameter */
1268 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
1269 SYMBOL_CLASS (sym
) = LOC_REF_ARG
;
1270 SYMBOL_IS_ARGUMENT (sym
) = 1;
1271 SYMBOL_VALUE (sym
) = valu
;
1272 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1273 add_symbol_to_list (sym
, &local_symbols
);
1277 /* Reference parameter which is in a register. */
1278 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
1279 SYMBOL_CLASS (sym
) = LOC_REGPARM_ADDR
;
1280 SYMBOL_IS_ARGUMENT (sym
) = 1;
1281 SYMBOL_VALUE (sym
) = gdbarch_stab_reg_to_regnum (current_gdbarch
, valu
);
1282 if (SYMBOL_VALUE (sym
) >= gdbarch_num_regs (current_gdbarch
)
1283 + gdbarch_num_pseudo_regs (current_gdbarch
))
1285 reg_value_complaint (SYMBOL_VALUE (sym
),
1286 gdbarch_num_regs (current_gdbarch
)
1287 + gdbarch_num_pseudo_regs (current_gdbarch
),
1288 SYMBOL_PRINT_NAME (sym
));
1289 SYMBOL_VALUE (sym
) = gdbarch_sp_regnum (current_gdbarch
);
1290 /* Known safe, though useless */
1292 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1293 add_symbol_to_list (sym
, &local_symbols
);
1297 /* This is used by Sun FORTRAN for "function result value".
1298 Sun claims ("dbx and dbxtool interfaces", 2nd ed)
1299 that Pascal uses it too, but when I tried it Pascal used
1300 "x:3" (local symbol) instead. */
1301 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
1302 SYMBOL_CLASS (sym
) = LOC_LOCAL
;
1303 SYMBOL_VALUE (sym
) = valu
;
1304 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1305 add_symbol_to_list (sym
, &local_symbols
);
1309 SYMBOL_TYPE (sym
) = error_type (&p
, objfile
);
1310 SYMBOL_CLASS (sym
) = LOC_CONST
;
1311 SYMBOL_VALUE (sym
) = 0;
1312 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1313 add_symbol_to_list (sym
, &file_symbols
);
1317 /* Some systems pass variables of certain types by reference instead
1318 of by value, i.e. they will pass the address of a structure (in a
1319 register or on the stack) instead of the structure itself. */
1321 if (gdbarch_stabs_argument_has_addr (gdbarch
, SYMBOL_TYPE (sym
))
1322 && SYMBOL_IS_ARGUMENT (sym
))
1324 /* We have to convert LOC_REGISTER to LOC_REGPARM_ADDR (for
1325 variables passed in a register). */
1326 if (SYMBOL_CLASS (sym
) == LOC_REGISTER
)
1327 SYMBOL_CLASS (sym
) = LOC_REGPARM_ADDR
;
1328 /* Likewise for converting LOC_ARG to LOC_REF_ARG (for the 7th
1329 and subsequent arguments on SPARC, for example). */
1330 else if (SYMBOL_CLASS (sym
) == LOC_ARG
)
1331 SYMBOL_CLASS (sym
) = LOC_REF_ARG
;
1337 /* Skip rest of this symbol and return an error type.
1339 General notes on error recovery: error_type always skips to the
1340 end of the symbol (modulo cretinous dbx symbol name continuation).
1341 Thus code like this:
1343 if (*(*pp)++ != ';')
1344 return error_type (pp, objfile);
1346 is wrong because if *pp starts out pointing at '\0' (typically as the
1347 result of an earlier error), it will be incremented to point to the
1348 start of the next symbol, which might produce strange results, at least
1349 if you run off the end of the string table. Instead use
1352 return error_type (pp, objfile);
1358 foo = error_type (pp, objfile);
1362 And in case it isn't obvious, the point of all this hair is so the compiler
1363 can define new types and new syntaxes, and old versions of the
1364 debugger will be able to read the new symbol tables. */
1366 static struct type
*
1367 error_type (char **pp
, struct objfile
*objfile
)
1369 complaint (&symfile_complaints
, _("couldn't parse type; debugger out of date?"));
1372 /* Skip to end of symbol. */
1373 while (**pp
!= '\0')
1378 /* Check for and handle cretinous dbx symbol name continuation! */
1379 if ((*pp
)[-1] == '\\' || (*pp
)[-1] == '?')
1381 *pp
= next_symbol_text (objfile
);
1388 return (builtin_type_error
);
1392 /* Read type information or a type definition; return the type. Even
1393 though this routine accepts either type information or a type
1394 definition, the distinction is relevant--some parts of stabsread.c
1395 assume that type information starts with a digit, '-', or '(' in
1396 deciding whether to call read_type. */
1398 static struct type
*
1399 read_type (char **pp
, struct objfile
*objfile
)
1401 struct type
*type
= 0;
1404 char type_descriptor
;
1406 /* Size in bits of type if specified by a type attribute, or -1 if
1407 there is no size attribute. */
1410 /* Used to distinguish string and bitstring from char-array and set. */
1413 /* Used to distinguish vector from array. */
1416 /* Read type number if present. The type number may be omitted.
1417 for instance in a two-dimensional array declared with type
1418 "ar1;1;10;ar1;1;10;4". */
1419 if ((**pp
>= '0' && **pp
<= '9')
1423 if (read_type_number (pp
, typenums
) != 0)
1424 return error_type (pp
, objfile
);
1428 /* Type is not being defined here. Either it already
1429 exists, or this is a forward reference to it.
1430 dbx_alloc_type handles both cases. */
1431 type
= dbx_alloc_type (typenums
, objfile
);
1433 /* If this is a forward reference, arrange to complain if it
1434 doesn't get patched up by the time we're done
1436 if (TYPE_CODE (type
) == TYPE_CODE_UNDEF
)
1437 add_undefined_type (type
, typenums
);
1442 /* Type is being defined here. */
1444 Also skip the type descriptor - we get it below with (*pp)[-1]. */
1449 /* 'typenums=' not present, type is anonymous. Read and return
1450 the definition, but don't put it in the type vector. */
1451 typenums
[0] = typenums
[1] = -1;
1456 type_descriptor
= (*pp
)[-1];
1457 switch (type_descriptor
)
1461 enum type_code code
;
1463 /* Used to index through file_symbols. */
1464 struct pending
*ppt
;
1467 /* Name including "struct", etc. */
1471 char *from
, *to
, *p
, *q1
, *q2
;
1473 /* Set the type code according to the following letter. */
1477 code
= TYPE_CODE_STRUCT
;
1480 code
= TYPE_CODE_UNION
;
1483 code
= TYPE_CODE_ENUM
;
1487 /* Complain and keep going, so compilers can invent new
1488 cross-reference types. */
1489 complaint (&symfile_complaints
,
1490 _("Unrecognized cross-reference type `%c'"), (*pp
)[0]);
1491 code
= TYPE_CODE_STRUCT
;
1496 q1
= strchr (*pp
, '<');
1497 p
= strchr (*pp
, ':');
1499 return error_type (pp
, objfile
);
1500 if (q1
&& p
> q1
&& p
[1] == ':')
1502 int nesting_level
= 0;
1503 for (q2
= q1
; *q2
; q2
++)
1507 else if (*q2
== '>')
1509 else if (*q2
== ':' && nesting_level
== 0)
1514 return error_type (pp
, objfile
);
1517 (char *) obstack_alloc (&objfile
->objfile_obstack
, p
- *pp
+ 1);
1519 /* Copy the name. */
1525 /* Set the pointer ahead of the name which we just read, and
1530 /* If this type has already been declared, then reuse the same
1531 type, rather than allocating a new one. This saves some
1534 for (ppt
= file_symbols
; ppt
; ppt
= ppt
->next
)
1535 for (i
= 0; i
< ppt
->nsyms
; i
++)
1537 struct symbol
*sym
= ppt
->symbol
[i
];
1539 if (SYMBOL_CLASS (sym
) == LOC_TYPEDEF
1540 && SYMBOL_DOMAIN (sym
) == STRUCT_DOMAIN
1541 && (TYPE_CODE (SYMBOL_TYPE (sym
)) == code
)
1542 && strcmp (DEPRECATED_SYMBOL_NAME (sym
), type_name
) == 0)
1544 obstack_free (&objfile
->objfile_obstack
, type_name
);
1545 type
= SYMBOL_TYPE (sym
);
1546 if (typenums
[0] != -1)
1547 *dbx_lookup_type (typenums
) = type
;
1552 /* Didn't find the type to which this refers, so we must
1553 be dealing with a forward reference. Allocate a type
1554 structure for it, and keep track of it so we can
1555 fill in the rest of the fields when we get the full
1557 type
= dbx_alloc_type (typenums
, objfile
);
1558 TYPE_CODE (type
) = code
;
1559 TYPE_TAG_NAME (type
) = type_name
;
1560 INIT_CPLUS_SPECIFIC (type
);
1561 TYPE_FLAGS (type
) |= TYPE_FLAG_STUB
;
1563 add_undefined_type (type
, typenums
);
1567 case '-': /* RS/6000 built-in type */
1581 /* We deal with something like t(1,2)=(3,4)=... which
1582 the Lucid compiler and recent gcc versions (post 2.7.3) use. */
1584 /* Allocate and enter the typedef type first.
1585 This handles recursive types. */
1586 type
= dbx_alloc_type (typenums
, objfile
);
1587 TYPE_CODE (type
) = TYPE_CODE_TYPEDEF
;
1589 struct type
*xtype
= read_type (pp
, objfile
);
1592 /* It's being defined as itself. That means it is "void". */
1593 TYPE_CODE (type
) = TYPE_CODE_VOID
;
1594 TYPE_LENGTH (type
) = 1;
1596 else if (type_size
>= 0 || is_string
)
1598 /* This is the absolute wrong way to construct types. Every
1599 other debug format has found a way around this problem and
1600 the related problems with unnecessarily stubbed types;
1601 someone motivated should attempt to clean up the issue
1602 here as well. Once a type pointed to has been created it
1603 should not be modified.
1605 Well, it's not *absolutely* wrong. Constructing recursive
1606 types (trees, linked lists) necessarily entails modifying
1607 types after creating them. Constructing any loop structure
1608 entails side effects. The Dwarf 2 reader does handle this
1609 more gracefully (it never constructs more than once
1610 instance of a type object, so it doesn't have to copy type
1611 objects wholesale), but it still mutates type objects after
1612 other folks have references to them.
1614 Keep in mind that this circularity/mutation issue shows up
1615 at the source language level, too: C's "incomplete types",
1616 for example. So the proper cleanup, I think, would be to
1617 limit GDB's type smashing to match exactly those required
1618 by the source language. So GDB could have a
1619 "complete_this_type" function, but never create unnecessary
1620 copies of a type otherwise. */
1621 replace_type (type
, xtype
);
1622 TYPE_NAME (type
) = NULL
;
1623 TYPE_TAG_NAME (type
) = NULL
;
1627 TYPE_FLAGS (type
) |= TYPE_FLAG_TARGET_STUB
;
1628 TYPE_TARGET_TYPE (type
) = xtype
;
1633 /* In the following types, we must be sure to overwrite any existing
1634 type that the typenums refer to, rather than allocating a new one
1635 and making the typenums point to the new one. This is because there
1636 may already be pointers to the existing type (if it had been
1637 forward-referenced), and we must change it to a pointer, function,
1638 reference, or whatever, *in-place*. */
1640 case '*': /* Pointer to another type */
1641 type1
= read_type (pp
, objfile
);
1642 type
= make_pointer_type (type1
, dbx_lookup_type (typenums
));
1645 case '&': /* Reference to another type */
1646 type1
= read_type (pp
, objfile
);
1647 type
= make_reference_type (type1
, dbx_lookup_type (typenums
));
1650 case 'f': /* Function returning another type */
1651 type1
= read_type (pp
, objfile
);
1652 type
= make_function_type (type1
, dbx_lookup_type (typenums
));
1655 case 'g': /* Prototyped function. (Sun) */
1657 /* Unresolved questions:
1659 - According to Sun's ``STABS Interface Manual'', for 'f'
1660 and 'F' symbol descriptors, a `0' in the argument type list
1661 indicates a varargs function. But it doesn't say how 'g'
1662 type descriptors represent that info. Someone with access
1663 to Sun's toolchain should try it out.
1665 - According to the comment in define_symbol (search for
1666 `process_prototype_types:'), Sun emits integer arguments as
1667 types which ref themselves --- like `void' types. Do we
1668 have to deal with that here, too? Again, someone with
1669 access to Sun's toolchain should try it out and let us
1672 const char *type_start
= (*pp
) - 1;
1673 struct type
*return_type
= read_type (pp
, objfile
);
1674 struct type
*func_type
1675 = make_function_type (return_type
, dbx_lookup_type (typenums
));
1678 struct type_list
*next
;
1682 while (**pp
&& **pp
!= '#')
1684 struct type
*arg_type
= read_type (pp
, objfile
);
1685 struct type_list
*new = alloca (sizeof (*new));
1686 new->type
= arg_type
;
1687 new->next
= arg_types
;
1695 complaint (&symfile_complaints
,
1696 _("Prototyped function type didn't end arguments with `#':\n%s"),
1700 /* If there is just one argument whose type is `void', then
1701 that's just an empty argument list. */
1703 && ! arg_types
->next
1704 && TYPE_CODE (arg_types
->type
) == TYPE_CODE_VOID
)
1707 TYPE_FIELDS (func_type
)
1708 = (struct field
*) TYPE_ALLOC (func_type
,
1709 num_args
* sizeof (struct field
));
1710 memset (TYPE_FIELDS (func_type
), 0, num_args
* sizeof (struct field
));
1713 struct type_list
*t
;
1715 /* We stuck each argument type onto the front of the list
1716 when we read it, so the list is reversed. Build the
1717 fields array right-to-left. */
1718 for (t
= arg_types
, i
= num_args
- 1; t
; t
= t
->next
, i
--)
1719 TYPE_FIELD_TYPE (func_type
, i
) = t
->type
;
1721 TYPE_NFIELDS (func_type
) = num_args
;
1722 TYPE_FLAGS (func_type
) |= TYPE_FLAG_PROTOTYPED
;
1728 case 'k': /* Const qualifier on some type (Sun) */
1729 type
= read_type (pp
, objfile
);
1730 type
= make_cv_type (1, TYPE_VOLATILE (type
), type
,
1731 dbx_lookup_type (typenums
));
1734 case 'B': /* Volatile qual on some type (Sun) */
1735 type
= read_type (pp
, objfile
);
1736 type
= make_cv_type (TYPE_CONST (type
), 1, type
,
1737 dbx_lookup_type (typenums
));
1741 if (isdigit (**pp
) || **pp
== '(' || **pp
== '-')
1742 { /* Member (class & variable) type */
1743 /* FIXME -- we should be doing smash_to_XXX types here. */
1745 struct type
*domain
= read_type (pp
, objfile
);
1746 struct type
*memtype
;
1749 /* Invalid member type data format. */
1750 return error_type (pp
, objfile
);
1753 memtype
= read_type (pp
, objfile
);
1754 type
= dbx_alloc_type (typenums
, objfile
);
1755 smash_to_memberptr_type (type
, domain
, memtype
);
1758 /* type attribute */
1761 /* Skip to the semicolon. */
1762 while (**pp
!= ';' && **pp
!= '\0')
1765 return error_type (pp
, objfile
);
1767 ++ * pp
; /* Skip the semicolon. */
1771 case 's': /* Size attribute */
1772 type_size
= atoi (attr
+ 1);
1777 case 'S': /* String attribute */
1778 /* FIXME: check to see if following type is array? */
1782 case 'V': /* Vector attribute */
1783 /* FIXME: check to see if following type is array? */
1788 /* Ignore unrecognized type attributes, so future compilers
1789 can invent new ones. */
1797 case '#': /* Method (class & fn) type */
1798 if ((*pp
)[0] == '#')
1800 /* We'll get the parameter types from the name. */
1801 struct type
*return_type
;
1804 return_type
= read_type (pp
, objfile
);
1805 if (*(*pp
)++ != ';')
1806 complaint (&symfile_complaints
,
1807 _("invalid (minimal) member type data format at symtab pos %d."),
1809 type
= allocate_stub_method (return_type
);
1810 if (typenums
[0] != -1)
1811 *dbx_lookup_type (typenums
) = type
;
1815 struct type
*domain
= read_type (pp
, objfile
);
1816 struct type
*return_type
;
1821 /* Invalid member type data format. */
1822 return error_type (pp
, objfile
);
1826 return_type
= read_type (pp
, objfile
);
1827 args
= read_args (pp
, ';', objfile
, &nargs
, &varargs
);
1829 return error_type (pp
, objfile
);
1830 type
= dbx_alloc_type (typenums
, objfile
);
1831 smash_to_method_type (type
, domain
, return_type
, args
,
1836 case 'r': /* Range type */
1837 type
= read_range_type (pp
, typenums
, type_size
, objfile
);
1838 if (typenums
[0] != -1)
1839 *dbx_lookup_type (typenums
) = type
;
1844 /* Sun ACC builtin int type */
1845 type
= read_sun_builtin_type (pp
, typenums
, objfile
);
1846 if (typenums
[0] != -1)
1847 *dbx_lookup_type (typenums
) = type
;
1851 case 'R': /* Sun ACC builtin float type */
1852 type
= read_sun_floating_type (pp
, typenums
, objfile
);
1853 if (typenums
[0] != -1)
1854 *dbx_lookup_type (typenums
) = type
;
1857 case 'e': /* Enumeration type */
1858 type
= dbx_alloc_type (typenums
, objfile
);
1859 type
= read_enum_type (pp
, type
, objfile
);
1860 if (typenums
[0] != -1)
1861 *dbx_lookup_type (typenums
) = type
;
1864 case 's': /* Struct type */
1865 case 'u': /* Union type */
1867 enum type_code type_code
= TYPE_CODE_UNDEF
;
1868 type
= dbx_alloc_type (typenums
, objfile
);
1869 switch (type_descriptor
)
1872 type_code
= TYPE_CODE_STRUCT
;
1875 type_code
= TYPE_CODE_UNION
;
1878 type
= read_struct_type (pp
, type
, type_code
, objfile
);
1882 case 'a': /* Array type */
1884 return error_type (pp
, objfile
);
1887 type
= dbx_alloc_type (typenums
, objfile
);
1888 type
= read_array_type (pp
, type
, objfile
);
1890 TYPE_CODE (type
) = TYPE_CODE_STRING
;
1892 make_vector_type (type
);
1895 case 'S': /* Set or bitstring type */
1896 type1
= read_type (pp
, objfile
);
1897 type
= create_set_type ((struct type
*) NULL
, type1
);
1899 TYPE_CODE (type
) = TYPE_CODE_BITSTRING
;
1900 if (typenums
[0] != -1)
1901 *dbx_lookup_type (typenums
) = type
;
1905 --*pp
; /* Go back to the symbol in error */
1906 /* Particularly important if it was \0! */
1907 return error_type (pp
, objfile
);
1912 warning (_("GDB internal error, type is NULL in stabsread.c."));
1913 return error_type (pp
, objfile
);
1916 /* Size specified in a type attribute overrides any other size. */
1917 if (type_size
!= -1)
1918 TYPE_LENGTH (type
) = (type_size
+ TARGET_CHAR_BIT
- 1) / TARGET_CHAR_BIT
;
1923 /* RS/6000 xlc/dbx combination uses a set of builtin types, starting from -1.
1924 Return the proper type node for a given builtin type number. */
1926 static struct type
*
1927 rs6000_builtin_type (int typenum
)
1929 /* We recognize types numbered from -NUMBER_RECOGNIZED to -1. */
1930 #define NUMBER_RECOGNIZED 34
1931 /* This includes an empty slot for type number -0. */
1932 static struct type
*negative_types
[NUMBER_RECOGNIZED
+ 1];
1933 struct type
*rettype
= NULL
;
1935 if (typenum
>= 0 || typenum
< -NUMBER_RECOGNIZED
)
1937 complaint (&symfile_complaints
, _("Unknown builtin type %d"), typenum
);
1938 return builtin_type_error
;
1940 if (negative_types
[-typenum
] != NULL
)
1941 return negative_types
[-typenum
];
1943 #if TARGET_CHAR_BIT != 8
1944 #error This code wrong for TARGET_CHAR_BIT not 8
1945 /* These definitions all assume that TARGET_CHAR_BIT is 8. I think
1946 that if that ever becomes not true, the correct fix will be to
1947 make the size in the struct type to be in bits, not in units of
1954 /* The size of this and all the other types are fixed, defined
1955 by the debugging format. If there is a type called "int" which
1956 is other than 32 bits, then it should use a new negative type
1957 number (or avoid negative type numbers for that case).
1958 See stabs.texinfo. */
1959 rettype
= init_type (TYPE_CODE_INT
, 4, 0, "int", NULL
);
1962 rettype
= init_type (TYPE_CODE_INT
, 1, 0, "char", NULL
);
1965 rettype
= init_type (TYPE_CODE_INT
, 2, 0, "short", NULL
);
1968 rettype
= init_type (TYPE_CODE_INT
, 4, 0, "long", NULL
);
1971 rettype
= init_type (TYPE_CODE_INT
, 1, TYPE_FLAG_UNSIGNED
,
1972 "unsigned char", NULL
);
1975 rettype
= init_type (TYPE_CODE_INT
, 1, 0, "signed char", NULL
);
1978 rettype
= init_type (TYPE_CODE_INT
, 2, TYPE_FLAG_UNSIGNED
,
1979 "unsigned short", NULL
);
1982 rettype
= init_type (TYPE_CODE_INT
, 4, TYPE_FLAG_UNSIGNED
,
1983 "unsigned int", NULL
);
1986 rettype
= init_type (TYPE_CODE_INT
, 4, TYPE_FLAG_UNSIGNED
,
1989 rettype
= init_type (TYPE_CODE_INT
, 4, TYPE_FLAG_UNSIGNED
,
1990 "unsigned long", NULL
);
1993 rettype
= init_type (TYPE_CODE_VOID
, 1, 0, "void", NULL
);
1996 /* IEEE single precision (32 bit). */
1997 rettype
= init_type (TYPE_CODE_FLT
, 4, 0, "float", NULL
);
2000 /* IEEE double precision (64 bit). */
2001 rettype
= init_type (TYPE_CODE_FLT
, 8, 0, "double", NULL
);
2004 /* This is an IEEE double on the RS/6000, and different machines with
2005 different sizes for "long double" should use different negative
2006 type numbers. See stabs.texinfo. */
2007 rettype
= init_type (TYPE_CODE_FLT
, 8, 0, "long double", NULL
);
2010 rettype
= init_type (TYPE_CODE_INT
, 4, 0, "integer", NULL
);
2013 rettype
= init_type (TYPE_CODE_BOOL
, 4, TYPE_FLAG_UNSIGNED
,
2017 rettype
= init_type (TYPE_CODE_FLT
, 4, 0, "short real", NULL
);
2020 rettype
= init_type (TYPE_CODE_FLT
, 8, 0, "real", NULL
);
2023 rettype
= init_type (TYPE_CODE_ERROR
, 0, 0, "stringptr", NULL
);
2026 rettype
= init_type (TYPE_CODE_CHAR
, 1, TYPE_FLAG_UNSIGNED
,
2030 rettype
= init_type (TYPE_CODE_BOOL
, 1, TYPE_FLAG_UNSIGNED
,
2034 rettype
= init_type (TYPE_CODE_BOOL
, 2, TYPE_FLAG_UNSIGNED
,
2038 rettype
= init_type (TYPE_CODE_BOOL
, 4, TYPE_FLAG_UNSIGNED
,
2042 rettype
= init_type (TYPE_CODE_BOOL
, 4, TYPE_FLAG_UNSIGNED
,
2046 /* Complex type consisting of two IEEE single precision values. */
2047 rettype
= init_type (TYPE_CODE_COMPLEX
, 8, 0, "complex", NULL
);
2048 TYPE_TARGET_TYPE (rettype
) = init_type (TYPE_CODE_FLT
, 4, 0, "float",
2052 /* Complex type consisting of two IEEE double precision values. */
2053 rettype
= init_type (TYPE_CODE_COMPLEX
, 16, 0, "double complex", NULL
);
2054 TYPE_TARGET_TYPE (rettype
) = init_type (TYPE_CODE_FLT
, 8, 0, "double",
2058 rettype
= init_type (TYPE_CODE_INT
, 1, 0, "integer*1", NULL
);
2061 rettype
= init_type (TYPE_CODE_INT
, 2, 0, "integer*2", NULL
);
2064 rettype
= init_type (TYPE_CODE_INT
, 4, 0, "integer*4", NULL
);
2067 rettype
= init_type (TYPE_CODE_CHAR
, 2, 0, "wchar", NULL
);
2070 rettype
= init_type (TYPE_CODE_INT
, 8, 0, "long long", NULL
);
2073 rettype
= init_type (TYPE_CODE_INT
, 8, TYPE_FLAG_UNSIGNED
,
2074 "unsigned long long", NULL
);
2077 rettype
= init_type (TYPE_CODE_INT
, 8, TYPE_FLAG_UNSIGNED
,
2081 rettype
= init_type (TYPE_CODE_INT
, 8, 0, "integer*8", NULL
);
2084 negative_types
[-typenum
] = rettype
;
2088 /* This page contains subroutines of read_type. */
2090 /* Replace *OLD_NAME with the method name portion of PHYSNAME. */
2093 update_method_name_from_physname (char **old_name
, char *physname
)
2097 method_name
= method_name_from_physname (physname
);
2099 if (method_name
== NULL
)
2101 complaint (&symfile_complaints
,
2102 _("Method has bad physname %s\n"), physname
);
2106 if (strcmp (*old_name
, method_name
) != 0)
2109 *old_name
= method_name
;
2112 xfree (method_name
);
2115 /* Read member function stabs info for C++ classes. The form of each member
2118 NAME :: TYPENUM[=type definition] ARGS : PHYSNAME ;
2120 An example with two member functions is:
2122 afunc1::20=##15;:i;2A.;afunc2::20:i;2A.;
2124 For the case of overloaded operators, the format is op$::*.funcs, where
2125 $ is the CPLUS_MARKER (usually '$'), `*' holds the place for an operator
2126 name (such as `+=') and `.' marks the end of the operator name.
2128 Returns 1 for success, 0 for failure. */
2131 read_member_functions (struct field_info
*fip
, char **pp
, struct type
*type
,
2132 struct objfile
*objfile
)
2136 /* Total number of member functions defined in this class. If the class
2137 defines two `f' functions, and one `g' function, then this will have
2139 int total_length
= 0;
2143 struct next_fnfield
*next
;
2144 struct fn_field fn_field
;
2147 struct type
*look_ahead_type
;
2148 struct next_fnfieldlist
*new_fnlist
;
2149 struct next_fnfield
*new_sublist
;
2153 /* Process each list until we find something that is not a member function
2154 or find the end of the functions. */
2158 /* We should be positioned at the start of the function name.
2159 Scan forward to find the first ':' and if it is not the
2160 first of a "::" delimiter, then this is not a member function. */
2172 look_ahead_type
= NULL
;
2175 new_fnlist
= (struct next_fnfieldlist
*)
2176 xmalloc (sizeof (struct next_fnfieldlist
));
2177 make_cleanup (xfree
, new_fnlist
);
2178 memset (new_fnlist
, 0, sizeof (struct next_fnfieldlist
));
2180 if ((*pp
)[0] == 'o' && (*pp
)[1] == 'p' && is_cplus_marker ((*pp
)[2]))
2182 /* This is a completely wierd case. In order to stuff in the
2183 names that might contain colons (the usual name delimiter),
2184 Mike Tiemann defined a different name format which is
2185 signalled if the identifier is "op$". In that case, the
2186 format is "op$::XXXX." where XXXX is the name. This is
2187 used for names like "+" or "=". YUUUUUUUK! FIXME! */
2188 /* This lets the user type "break operator+".
2189 We could just put in "+" as the name, but that wouldn't
2191 static char opname
[32] = "op$";
2192 char *o
= opname
+ 3;
2194 /* Skip past '::'. */
2197 STABS_CONTINUE (pp
, objfile
);
2203 main_fn_name
= savestring (opname
, o
- opname
);
2209 main_fn_name
= savestring (*pp
, p
- *pp
);
2210 /* Skip past '::'. */
2213 new_fnlist
->fn_fieldlist
.name
= main_fn_name
;
2218 (struct next_fnfield
*) xmalloc (sizeof (struct next_fnfield
));
2219 make_cleanup (xfree
, new_sublist
);
2220 memset (new_sublist
, 0, sizeof (struct next_fnfield
));
2222 /* Check for and handle cretinous dbx symbol name continuation! */
2223 if (look_ahead_type
== NULL
)
2226 STABS_CONTINUE (pp
, objfile
);
2228 new_sublist
->fn_field
.type
= read_type (pp
, objfile
);
2231 /* Invalid symtab info for member function. */
2237 /* g++ version 1 kludge */
2238 new_sublist
->fn_field
.type
= look_ahead_type
;
2239 look_ahead_type
= NULL
;
2249 /* If this is just a stub, then we don't have the real name here. */
2251 if (TYPE_STUB (new_sublist
->fn_field
.type
))
2253 if (!TYPE_DOMAIN_TYPE (new_sublist
->fn_field
.type
))
2254 TYPE_DOMAIN_TYPE (new_sublist
->fn_field
.type
) = type
;
2255 new_sublist
->fn_field
.is_stub
= 1;
2257 new_sublist
->fn_field
.physname
= savestring (*pp
, p
- *pp
);
2260 /* Set this member function's visibility fields. */
2263 case VISIBILITY_PRIVATE
:
2264 new_sublist
->fn_field
.is_private
= 1;
2266 case VISIBILITY_PROTECTED
:
2267 new_sublist
->fn_field
.is_protected
= 1;
2271 STABS_CONTINUE (pp
, objfile
);
2274 case 'A': /* Normal functions. */
2275 new_sublist
->fn_field
.is_const
= 0;
2276 new_sublist
->fn_field
.is_volatile
= 0;
2279 case 'B': /* `const' member functions. */
2280 new_sublist
->fn_field
.is_const
= 1;
2281 new_sublist
->fn_field
.is_volatile
= 0;
2284 case 'C': /* `volatile' member function. */
2285 new_sublist
->fn_field
.is_const
= 0;
2286 new_sublist
->fn_field
.is_volatile
= 1;
2289 case 'D': /* `const volatile' member function. */
2290 new_sublist
->fn_field
.is_const
= 1;
2291 new_sublist
->fn_field
.is_volatile
= 1;
2294 case '*': /* File compiled with g++ version 1 -- no info */
2299 complaint (&symfile_complaints
,
2300 _("const/volatile indicator missing, got '%c'"), **pp
);
2309 /* virtual member function, followed by index.
2310 The sign bit is set to distinguish pointers-to-methods
2311 from virtual function indicies. Since the array is
2312 in words, the quantity must be shifted left by 1
2313 on 16 bit machine, and by 2 on 32 bit machine, forcing
2314 the sign bit out, and usable as a valid index into
2315 the array. Remove the sign bit here. */
2316 new_sublist
->fn_field
.voffset
=
2317 (0x7fffffff & read_huge_number (pp
, ';', &nbits
, 0)) + 2;
2321 STABS_CONTINUE (pp
, objfile
);
2322 if (**pp
== ';' || **pp
== '\0')
2324 /* Must be g++ version 1. */
2325 new_sublist
->fn_field
.fcontext
= 0;
2329 /* Figure out from whence this virtual function came.
2330 It may belong to virtual function table of
2331 one of its baseclasses. */
2332 look_ahead_type
= read_type (pp
, objfile
);
2335 /* g++ version 1 overloaded methods. */
2339 new_sublist
->fn_field
.fcontext
= look_ahead_type
;
2348 look_ahead_type
= NULL
;
2354 /* static member function. */
2356 int slen
= strlen (main_fn_name
);
2358 new_sublist
->fn_field
.voffset
= VOFFSET_STATIC
;
2360 /* For static member functions, we can't tell if they
2361 are stubbed, as they are put out as functions, and not as
2363 GCC v2 emits the fully mangled name if
2364 dbxout.c:flag_minimal_debug is not set, so we have to
2365 detect a fully mangled physname here and set is_stub
2366 accordingly. Fully mangled physnames in v2 start with
2367 the member function name, followed by two underscores.
2368 GCC v3 currently always emits stubbed member functions,
2369 but with fully mangled physnames, which start with _Z. */
2370 if (!(strncmp (new_sublist
->fn_field
.physname
,
2371 main_fn_name
, slen
) == 0
2372 && new_sublist
->fn_field
.physname
[slen
] == '_'
2373 && new_sublist
->fn_field
.physname
[slen
+ 1] == '_'))
2375 new_sublist
->fn_field
.is_stub
= 1;
2382 complaint (&symfile_complaints
,
2383 _("member function type missing, got '%c'"), (*pp
)[-1]);
2384 /* Fall through into normal member function. */
2387 /* normal member function. */
2388 new_sublist
->fn_field
.voffset
= 0;
2389 new_sublist
->fn_field
.fcontext
= 0;
2393 new_sublist
->next
= sublist
;
2394 sublist
= new_sublist
;
2396 STABS_CONTINUE (pp
, objfile
);
2398 while (**pp
!= ';' && **pp
!= '\0');
2401 STABS_CONTINUE (pp
, objfile
);
2403 /* Skip GCC 3.X member functions which are duplicates of the callable
2404 constructor/destructor. */
2405 if (strcmp (main_fn_name
, "__base_ctor") == 0
2406 || strcmp (main_fn_name
, "__base_dtor") == 0
2407 || strcmp (main_fn_name
, "__deleting_dtor") == 0)
2409 xfree (main_fn_name
);
2414 int has_destructor
= 0, has_other
= 0;
2416 struct next_fnfield
*tmp_sublist
;
2418 /* Various versions of GCC emit various mostly-useless
2419 strings in the name field for special member functions.
2421 For stub methods, we need to defer correcting the name
2422 until we are ready to unstub the method, because the current
2423 name string is used by gdb_mangle_name. The only stub methods
2424 of concern here are GNU v2 operators; other methods have their
2425 names correct (see caveat below).
2427 For non-stub methods, in GNU v3, we have a complete physname.
2428 Therefore we can safely correct the name now. This primarily
2429 affects constructors and destructors, whose name will be
2430 __comp_ctor or __comp_dtor instead of Foo or ~Foo. Cast
2431 operators will also have incorrect names; for instance,
2432 "operator int" will be named "operator i" (i.e. the type is
2435 For non-stub methods in GNU v2, we have no easy way to
2436 know if we have a complete physname or not. For most
2437 methods the result depends on the platform (if CPLUS_MARKER
2438 can be `$' or `.', it will use minimal debug information, or
2439 otherwise the full physname will be included).
2441 Rather than dealing with this, we take a different approach.
2442 For v3 mangled names, we can use the full physname; for v2,
2443 we use cplus_demangle_opname (which is actually v2 specific),
2444 because the only interesting names are all operators - once again
2445 barring the caveat below. Skip this process if any method in the
2446 group is a stub, to prevent our fouling up the workings of
2449 The caveat: GCC 2.95.x (and earlier?) put constructors and
2450 destructors in the same method group. We need to split this
2451 into two groups, because they should have different names.
2452 So for each method group we check whether it contains both
2453 routines whose physname appears to be a destructor (the physnames
2454 for and destructors are always provided, due to quirks in v2
2455 mangling) and routines whose physname does not appear to be a
2456 destructor. If so then we break up the list into two halves.
2457 Even if the constructors and destructors aren't in the same group
2458 the destructor will still lack the leading tilde, so that also
2461 So, to summarize what we expect and handle here:
2463 Given Given Real Real Action
2464 method name physname physname method name
2466 __opi [none] __opi__3Foo operator int opname
2468 Foo _._3Foo _._3Foo ~Foo separate and
2470 operator i _ZN3FoocviEv _ZN3FoocviEv operator int demangle
2471 __comp_ctor _ZN3FooC1ERKS_ _ZN3FooC1ERKS_ Foo demangle
2474 tmp_sublist
= sublist
;
2475 while (tmp_sublist
!= NULL
)
2477 if (tmp_sublist
->fn_field
.is_stub
)
2479 if (tmp_sublist
->fn_field
.physname
[0] == '_'
2480 && tmp_sublist
->fn_field
.physname
[1] == 'Z')
2483 if (is_destructor_name (tmp_sublist
->fn_field
.physname
))
2488 tmp_sublist
= tmp_sublist
->next
;
2491 if (has_destructor
&& has_other
)
2493 struct next_fnfieldlist
*destr_fnlist
;
2494 struct next_fnfield
*last_sublist
;
2496 /* Create a new fn_fieldlist for the destructors. */
2498 destr_fnlist
= (struct next_fnfieldlist
*)
2499 xmalloc (sizeof (struct next_fnfieldlist
));
2500 make_cleanup (xfree
, destr_fnlist
);
2501 memset (destr_fnlist
, 0, sizeof (struct next_fnfieldlist
));
2502 destr_fnlist
->fn_fieldlist
.name
2503 = obconcat (&objfile
->objfile_obstack
, "", "~",
2504 new_fnlist
->fn_fieldlist
.name
);
2506 destr_fnlist
->fn_fieldlist
.fn_fields
= (struct fn_field
*)
2507 obstack_alloc (&objfile
->objfile_obstack
,
2508 sizeof (struct fn_field
) * has_destructor
);
2509 memset (destr_fnlist
->fn_fieldlist
.fn_fields
, 0,
2510 sizeof (struct fn_field
) * has_destructor
);
2511 tmp_sublist
= sublist
;
2512 last_sublist
= NULL
;
2514 while (tmp_sublist
!= NULL
)
2516 if (!is_destructor_name (tmp_sublist
->fn_field
.physname
))
2518 tmp_sublist
= tmp_sublist
->next
;
2522 destr_fnlist
->fn_fieldlist
.fn_fields
[i
++]
2523 = tmp_sublist
->fn_field
;
2525 last_sublist
->next
= tmp_sublist
->next
;
2527 sublist
= tmp_sublist
->next
;
2528 last_sublist
= tmp_sublist
;
2529 tmp_sublist
= tmp_sublist
->next
;
2532 destr_fnlist
->fn_fieldlist
.length
= has_destructor
;
2533 destr_fnlist
->next
= fip
->fnlist
;
2534 fip
->fnlist
= destr_fnlist
;
2536 total_length
+= has_destructor
;
2537 length
-= has_destructor
;
2541 /* v3 mangling prevents the use of abbreviated physnames,
2542 so we can do this here. There are stubbed methods in v3
2544 - in -gstabs instead of -gstabs+
2545 - or for static methods, which are output as a function type
2546 instead of a method type. */
2548 update_method_name_from_physname (&new_fnlist
->fn_fieldlist
.name
,
2549 sublist
->fn_field
.physname
);
2551 else if (has_destructor
&& new_fnlist
->fn_fieldlist
.name
[0] != '~')
2553 new_fnlist
->fn_fieldlist
.name
=
2554 concat ("~", main_fn_name
, (char *)NULL
);
2555 xfree (main_fn_name
);
2559 char dem_opname
[256];
2561 ret
= cplus_demangle_opname (new_fnlist
->fn_fieldlist
.name
,
2562 dem_opname
, DMGL_ANSI
);
2564 ret
= cplus_demangle_opname (new_fnlist
->fn_fieldlist
.name
,
2567 new_fnlist
->fn_fieldlist
.name
2568 = obsavestring (dem_opname
, strlen (dem_opname
),
2569 &objfile
->objfile_obstack
);
2572 new_fnlist
->fn_fieldlist
.fn_fields
= (struct fn_field
*)
2573 obstack_alloc (&objfile
->objfile_obstack
,
2574 sizeof (struct fn_field
) * length
);
2575 memset (new_fnlist
->fn_fieldlist
.fn_fields
, 0,
2576 sizeof (struct fn_field
) * length
);
2577 for (i
= length
; (i
--, sublist
); sublist
= sublist
->next
)
2579 new_fnlist
->fn_fieldlist
.fn_fields
[i
] = sublist
->fn_field
;
2582 new_fnlist
->fn_fieldlist
.length
= length
;
2583 new_fnlist
->next
= fip
->fnlist
;
2584 fip
->fnlist
= new_fnlist
;
2586 total_length
+= length
;
2592 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
2593 TYPE_FN_FIELDLISTS (type
) = (struct fn_fieldlist
*)
2594 TYPE_ALLOC (type
, sizeof (struct fn_fieldlist
) * nfn_fields
);
2595 memset (TYPE_FN_FIELDLISTS (type
), 0,
2596 sizeof (struct fn_fieldlist
) * nfn_fields
);
2597 TYPE_NFN_FIELDS (type
) = nfn_fields
;
2598 TYPE_NFN_FIELDS_TOTAL (type
) = total_length
;
2604 /* Special GNU C++ name.
2606 Returns 1 for success, 0 for failure. "failure" means that we can't
2607 keep parsing and it's time for error_type(). */
2610 read_cpp_abbrev (struct field_info
*fip
, char **pp
, struct type
*type
,
2611 struct objfile
*objfile
)
2616 struct type
*context
;
2626 /* At this point, *pp points to something like "22:23=*22...",
2627 where the type number before the ':' is the "context" and
2628 everything after is a regular type definition. Lookup the
2629 type, find it's name, and construct the field name. */
2631 context
= read_type (pp
, objfile
);
2635 case 'f': /* $vf -- a virtual function table pointer */
2636 name
= type_name_no_tag (context
);
2641 fip
->list
->field
.name
=
2642 obconcat (&objfile
->objfile_obstack
, vptr_name
, name
, "");
2645 case 'b': /* $vb -- a virtual bsomethingorother */
2646 name
= type_name_no_tag (context
);
2649 complaint (&symfile_complaints
,
2650 _("C++ abbreviated type name unknown at symtab pos %d"),
2654 fip
->list
->field
.name
=
2655 obconcat (&objfile
->objfile_obstack
, vb_name
, name
, "");
2659 invalid_cpp_abbrev_complaint (*pp
);
2660 fip
->list
->field
.name
=
2661 obconcat (&objfile
->objfile_obstack
,
2662 "INVALID_CPLUSPLUS_ABBREV", "", "");
2666 /* At this point, *pp points to the ':'. Skip it and read the
2672 invalid_cpp_abbrev_complaint (*pp
);
2675 fip
->list
->field
.type
= read_type (pp
, objfile
);
2677 (*pp
)++; /* Skip the comma. */
2683 FIELD_BITPOS (fip
->list
->field
) = read_huge_number (pp
, ';', &nbits
,
2688 /* This field is unpacked. */
2689 FIELD_BITSIZE (fip
->list
->field
) = 0;
2690 fip
->list
->visibility
= VISIBILITY_PRIVATE
;
2694 invalid_cpp_abbrev_complaint (*pp
);
2695 /* We have no idea what syntax an unrecognized abbrev would have, so
2696 better return 0. If we returned 1, we would need to at least advance
2697 *pp to avoid an infinite loop. */
2704 read_one_struct_field (struct field_info
*fip
, char **pp
, char *p
,
2705 struct type
*type
, struct objfile
*objfile
)
2707 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
2709 fip
->list
->field
.name
=
2710 obsavestring (*pp
, p
- *pp
, &objfile
->objfile_obstack
);
2713 /* This means we have a visibility for a field coming. */
2717 fip
->list
->visibility
= *(*pp
)++;
2721 /* normal dbx-style format, no explicit visibility */
2722 fip
->list
->visibility
= VISIBILITY_PUBLIC
;
2725 fip
->list
->field
.type
= read_type (pp
, objfile
);
2730 /* Possible future hook for nested types. */
2733 fip
->list
->field
.bitpos
= (long) -2; /* nested type */
2743 /* Static class member. */
2744 SET_FIELD_PHYSNAME (fip
->list
->field
, savestring (*pp
, p
- *pp
));
2748 else if (**pp
!= ',')
2750 /* Bad structure-type format. */
2751 stabs_general_complaint ("bad structure-type format");
2755 (*pp
)++; /* Skip the comma. */
2759 FIELD_BITPOS (fip
->list
->field
) = read_huge_number (pp
, ',', &nbits
, 0);
2762 stabs_general_complaint ("bad structure-type format");
2765 FIELD_BITSIZE (fip
->list
->field
) = read_huge_number (pp
, ';', &nbits
, 0);
2768 stabs_general_complaint ("bad structure-type format");
2773 if (FIELD_BITPOS (fip
->list
->field
) == 0
2774 && FIELD_BITSIZE (fip
->list
->field
) == 0)
2776 /* This can happen in two cases: (1) at least for gcc 2.4.5 or so,
2777 it is a field which has been optimized out. The correct stab for
2778 this case is to use VISIBILITY_IGNORE, but that is a recent
2779 invention. (2) It is a 0-size array. For example
2780 union { int num; char str[0]; } foo. Printing _("<no value>" for
2781 str in "p foo" is OK, since foo.str (and thus foo.str[3])
2782 will continue to work, and a 0-size array as a whole doesn't
2783 have any contents to print.
2785 I suspect this probably could also happen with gcc -gstabs (not
2786 -gstabs+) for static fields, and perhaps other C++ extensions.
2787 Hopefully few people use -gstabs with gdb, since it is intended
2788 for dbx compatibility. */
2790 /* Ignore this field. */
2791 fip
->list
->visibility
= VISIBILITY_IGNORE
;
2795 /* Detect an unpacked field and mark it as such.
2796 dbx gives a bit size for all fields.
2797 Note that forward refs cannot be packed,
2798 and treat enums as if they had the width of ints. */
2800 struct type
*field_type
= check_typedef (FIELD_TYPE (fip
->list
->field
));
2802 if (TYPE_CODE (field_type
) != TYPE_CODE_INT
2803 && TYPE_CODE (field_type
) != TYPE_CODE_RANGE
2804 && TYPE_CODE (field_type
) != TYPE_CODE_BOOL
2805 && TYPE_CODE (field_type
) != TYPE_CODE_ENUM
)
2807 FIELD_BITSIZE (fip
->list
->field
) = 0;
2809 if ((FIELD_BITSIZE (fip
->list
->field
)
2810 == TARGET_CHAR_BIT
* TYPE_LENGTH (field_type
)
2811 || (TYPE_CODE (field_type
) == TYPE_CODE_ENUM
2812 && FIELD_BITSIZE (fip
->list
->field
)
2813 == gdbarch_int_bit (gdbarch
))
2816 FIELD_BITPOS (fip
->list
->field
) % 8 == 0)
2818 FIELD_BITSIZE (fip
->list
->field
) = 0;
2824 /* Read struct or class data fields. They have the form:
2826 NAME : [VISIBILITY] TYPENUM , BITPOS , BITSIZE ;
2828 At the end, we see a semicolon instead of a field.
2830 In C++, this may wind up being NAME:?TYPENUM:PHYSNAME; for
2833 The optional VISIBILITY is one of:
2835 '/0' (VISIBILITY_PRIVATE)
2836 '/1' (VISIBILITY_PROTECTED)
2837 '/2' (VISIBILITY_PUBLIC)
2838 '/9' (VISIBILITY_IGNORE)
2840 or nothing, for C style fields with public visibility.
2842 Returns 1 for success, 0 for failure. */
2845 read_struct_fields (struct field_info
*fip
, char **pp
, struct type
*type
,
2846 struct objfile
*objfile
)
2849 struct nextfield
*new;
2851 /* We better set p right now, in case there are no fields at all... */
2855 /* Read each data member type until we find the terminating ';' at the end of
2856 the data member list, or break for some other reason such as finding the
2857 start of the member function list. */
2858 /* Stab string for structure/union does not end with two ';' in
2859 SUN C compiler 5.3 i.e. F6U2, hence check for end of string. */
2861 while (**pp
!= ';' && **pp
!= '\0')
2863 STABS_CONTINUE (pp
, objfile
);
2864 /* Get space to record the next field's data. */
2865 new = (struct nextfield
*) xmalloc (sizeof (struct nextfield
));
2866 make_cleanup (xfree
, new);
2867 memset (new, 0, sizeof (struct nextfield
));
2868 new->next
= fip
->list
;
2871 /* Get the field name. */
2874 /* If is starts with CPLUS_MARKER it is a special abbreviation,
2875 unless the CPLUS_MARKER is followed by an underscore, in
2876 which case it is just the name of an anonymous type, which we
2877 should handle like any other type name. */
2879 if (is_cplus_marker (p
[0]) && p
[1] != '_')
2881 if (!read_cpp_abbrev (fip
, pp
, type
, objfile
))
2886 /* Look for the ':' that separates the field name from the field
2887 values. Data members are delimited by a single ':', while member
2888 functions are delimited by a pair of ':'s. When we hit the member
2889 functions (if any), terminate scan loop and return. */
2891 while (*p
!= ':' && *p
!= '\0')
2898 /* Check to see if we have hit the member functions yet. */
2903 read_one_struct_field (fip
, pp
, p
, type
, objfile
);
2905 if (p
[0] == ':' && p
[1] == ':')
2907 /* (the deleted) chill the list of fields: the last entry (at
2908 the head) is a partially constructed entry which we now
2910 fip
->list
= fip
->list
->next
;
2915 /* The stabs for C++ derived classes contain baseclass information which
2916 is marked by a '!' character after the total size. This function is
2917 called when we encounter the baseclass marker, and slurps up all the
2918 baseclass information.
2920 Immediately following the '!' marker is the number of base classes that
2921 the class is derived from, followed by information for each base class.
2922 For each base class, there are two visibility specifiers, a bit offset
2923 to the base class information within the derived class, a reference to
2924 the type for the base class, and a terminating semicolon.
2926 A typical example, with two base classes, would be "!2,020,19;0264,21;".
2928 Baseclass information marker __________________|| | | | | | |
2929 Number of baseclasses __________________________| | | | | | |
2930 Visibility specifiers (2) ________________________| | | | | |
2931 Offset in bits from start of class _________________| | | | |
2932 Type number for base class ___________________________| | | |
2933 Visibility specifiers (2) _______________________________| | |
2934 Offset in bits from start of class ________________________| |
2935 Type number of base class ____________________________________|
2937 Return 1 for success, 0 for (error-type-inducing) failure. */
2943 read_baseclasses (struct field_info
*fip
, char **pp
, struct type
*type
,
2944 struct objfile
*objfile
)
2947 struct nextfield
*new;
2955 /* Skip the '!' baseclass information marker. */
2959 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
2962 TYPE_N_BASECLASSES (type
) = read_huge_number (pp
, ',', &nbits
, 0);
2968 /* Some stupid compilers have trouble with the following, so break
2969 it up into simpler expressions. */
2970 TYPE_FIELD_VIRTUAL_BITS (type
) = (B_TYPE
*)
2971 TYPE_ALLOC (type
, B_BYTES (TYPE_N_BASECLASSES (type
)));
2974 int num_bytes
= B_BYTES (TYPE_N_BASECLASSES (type
));
2977 pointer
= (char *) TYPE_ALLOC (type
, num_bytes
);
2978 TYPE_FIELD_VIRTUAL_BITS (type
) = (B_TYPE
*) pointer
;
2982 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type
), TYPE_N_BASECLASSES (type
));
2984 for (i
= 0; i
< TYPE_N_BASECLASSES (type
); i
++)
2986 new = (struct nextfield
*) xmalloc (sizeof (struct nextfield
));
2987 make_cleanup (xfree
, new);
2988 memset (new, 0, sizeof (struct nextfield
));
2989 new->next
= fip
->list
;
2991 FIELD_BITSIZE (new->field
) = 0; /* this should be an unpacked field! */
2993 STABS_CONTINUE (pp
, objfile
);
2997 /* Nothing to do. */
3000 SET_TYPE_FIELD_VIRTUAL (type
, i
);
3003 /* Unknown character. Complain and treat it as non-virtual. */
3005 complaint (&symfile_complaints
,
3006 _("Unknown virtual character `%c' for baseclass"), **pp
);
3011 new->visibility
= *(*pp
)++;
3012 switch (new->visibility
)
3014 case VISIBILITY_PRIVATE
:
3015 case VISIBILITY_PROTECTED
:
3016 case VISIBILITY_PUBLIC
:
3019 /* Bad visibility format. Complain and treat it as
3022 complaint (&symfile_complaints
,
3023 _("Unknown visibility `%c' for baseclass"),
3025 new->visibility
= VISIBILITY_PUBLIC
;
3032 /* The remaining value is the bit offset of the portion of the object
3033 corresponding to this baseclass. Always zero in the absence of
3034 multiple inheritance. */
3036 FIELD_BITPOS (new->field
) = read_huge_number (pp
, ',', &nbits
, 0);
3041 /* The last piece of baseclass information is the type of the
3042 base class. Read it, and remember it's type name as this
3045 new->field
.type
= read_type (pp
, objfile
);
3046 new->field
.name
= type_name_no_tag (new->field
.type
);
3048 /* skip trailing ';' and bump count of number of fields seen */
3057 /* The tail end of stabs for C++ classes that contain a virtual function
3058 pointer contains a tilde, a %, and a type number.
3059 The type number refers to the base class (possibly this class itself) which
3060 contains the vtable pointer for the current class.
3062 This function is called when we have parsed all the method declarations,
3063 so we can look for the vptr base class info. */
3066 read_tilde_fields (struct field_info
*fip
, char **pp
, struct type
*type
,
3067 struct objfile
*objfile
)
3071 STABS_CONTINUE (pp
, objfile
);
3073 /* If we are positioned at a ';', then skip it. */
3083 if (**pp
== '=' || **pp
== '+' || **pp
== '-')
3085 /* Obsolete flags that used to indicate the presence
3086 of constructors and/or destructors. */
3090 /* Read either a '%' or the final ';'. */
3091 if (*(*pp
)++ == '%')
3093 /* The next number is the type number of the base class
3094 (possibly our own class) which supplies the vtable for
3095 this class. Parse it out, and search that class to find
3096 its vtable pointer, and install those into TYPE_VPTR_BASETYPE
3097 and TYPE_VPTR_FIELDNO. */
3102 t
= read_type (pp
, objfile
);
3104 while (*p
!= '\0' && *p
!= ';')
3110 /* Premature end of symbol. */
3114 TYPE_VPTR_BASETYPE (type
) = t
;
3115 if (type
== t
) /* Our own class provides vtbl ptr */
3117 for (i
= TYPE_NFIELDS (t
) - 1;
3118 i
>= TYPE_N_BASECLASSES (t
);
3121 char *name
= TYPE_FIELD_NAME (t
, i
);
3122 if (!strncmp (name
, vptr_name
, sizeof (vptr_name
) - 2)
3123 && is_cplus_marker (name
[sizeof (vptr_name
) - 2]))
3125 TYPE_VPTR_FIELDNO (type
) = i
;
3129 /* Virtual function table field not found. */
3130 complaint (&symfile_complaints
,
3131 _("virtual function table pointer not found when defining class `%s'"),
3137 TYPE_VPTR_FIELDNO (type
) = TYPE_VPTR_FIELDNO (t
);
3148 attach_fn_fields_to_type (struct field_info
*fip
, struct type
*type
)
3152 for (n
= TYPE_NFN_FIELDS (type
);
3153 fip
->fnlist
!= NULL
;
3154 fip
->fnlist
= fip
->fnlist
->next
)
3156 --n
; /* Circumvent Sun3 compiler bug */
3157 TYPE_FN_FIELDLISTS (type
)[n
] = fip
->fnlist
->fn_fieldlist
;
3162 /* Create the vector of fields, and record how big it is.
3163 We need this info to record proper virtual function table information
3164 for this class's virtual functions. */
3167 attach_fields_to_type (struct field_info
*fip
, struct type
*type
,
3168 struct objfile
*objfile
)
3171 int non_public_fields
= 0;
3172 struct nextfield
*scan
;
3174 /* Count up the number of fields that we have, as well as taking note of
3175 whether or not there are any non-public fields, which requires us to
3176 allocate and build the private_field_bits and protected_field_bits
3179 for (scan
= fip
->list
; scan
!= NULL
; scan
= scan
->next
)
3182 if (scan
->visibility
!= VISIBILITY_PUBLIC
)
3184 non_public_fields
++;
3188 /* Now we know how many fields there are, and whether or not there are any
3189 non-public fields. Record the field count, allocate space for the
3190 array of fields, and create blank visibility bitfields if necessary. */
3192 TYPE_NFIELDS (type
) = nfields
;
3193 TYPE_FIELDS (type
) = (struct field
*)
3194 TYPE_ALLOC (type
, sizeof (struct field
) * nfields
);
3195 memset (TYPE_FIELDS (type
), 0, sizeof (struct field
) * nfields
);
3197 if (non_public_fields
)
3199 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
3201 TYPE_FIELD_PRIVATE_BITS (type
) =
3202 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
3203 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type
), nfields
);
3205 TYPE_FIELD_PROTECTED_BITS (type
) =
3206 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
3207 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type
), nfields
);
3209 TYPE_FIELD_IGNORE_BITS (type
) =
3210 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
3211 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type
), nfields
);
3214 /* Copy the saved-up fields into the field vector. Start from the head
3215 of the list, adding to the tail of the field array, so that they end
3216 up in the same order in the array in which they were added to the list. */
3218 while (nfields
-- > 0)
3220 TYPE_FIELD (type
, nfields
) = fip
->list
->field
;
3221 switch (fip
->list
->visibility
)
3223 case VISIBILITY_PRIVATE
:
3224 SET_TYPE_FIELD_PRIVATE (type
, nfields
);
3227 case VISIBILITY_PROTECTED
:
3228 SET_TYPE_FIELD_PROTECTED (type
, nfields
);
3231 case VISIBILITY_IGNORE
:
3232 SET_TYPE_FIELD_IGNORE (type
, nfields
);
3235 case VISIBILITY_PUBLIC
:
3239 /* Unknown visibility. Complain and treat it as public. */
3241 complaint (&symfile_complaints
, _("Unknown visibility `%c' for field"),
3242 fip
->list
->visibility
);
3246 fip
->list
= fip
->list
->next
;
3252 /* Complain that the compiler has emitted more than one definition for the
3253 structure type TYPE. */
3255 complain_about_struct_wipeout (struct type
*type
)
3260 if (TYPE_TAG_NAME (type
))
3262 name
= TYPE_TAG_NAME (type
);
3263 switch (TYPE_CODE (type
))
3265 case TYPE_CODE_STRUCT
: kind
= "struct "; break;
3266 case TYPE_CODE_UNION
: kind
= "union "; break;
3267 case TYPE_CODE_ENUM
: kind
= "enum "; break;
3271 else if (TYPE_NAME (type
))
3273 name
= TYPE_NAME (type
);
3282 complaint (&symfile_complaints
,
3283 _("struct/union type gets multiply defined: %s%s"), kind
, name
);
3287 /* Read the description of a structure (or union type) and return an object
3288 describing the type.
3290 PP points to a character pointer that points to the next unconsumed token
3291 in the the stabs string. For example, given stabs "A:T4=s4a:1,0,32;;",
3292 *PP will point to "4a:1,0,32;;".
3294 TYPE points to an incomplete type that needs to be filled in.
3296 OBJFILE points to the current objfile from which the stabs information is
3297 being read. (Note that it is redundant in that TYPE also contains a pointer
3298 to this same objfile, so it might be a good idea to eliminate it. FIXME).
3301 static struct type
*
3302 read_struct_type (char **pp
, struct type
*type
, enum type_code type_code
,
3303 struct objfile
*objfile
)
3305 struct cleanup
*back_to
;
3306 struct field_info fi
;
3311 /* When describing struct/union/class types in stabs, G++ always drops
3312 all qualifications from the name. So if you've got:
3313 struct A { ... struct B { ... }; ... };
3314 then G++ will emit stabs for `struct A::B' that call it simply
3315 `struct B'. Obviously, if you've got a real top-level definition for
3316 `struct B', or other nested definitions, this is going to cause
3319 Obviously, GDB can't fix this by itself, but it can at least avoid
3320 scribbling on existing structure type objects when new definitions
3322 if (! (TYPE_CODE (type
) == TYPE_CODE_UNDEF
3323 || TYPE_STUB (type
)))
3325 complain_about_struct_wipeout (type
);
3327 /* It's probably best to return the type unchanged. */
3331 back_to
= make_cleanup (null_cleanup
, 0);
3333 INIT_CPLUS_SPECIFIC (type
);
3334 TYPE_CODE (type
) = type_code
;
3335 TYPE_FLAGS (type
) &= ~TYPE_FLAG_STUB
;
3337 /* First comes the total size in bytes. */
3341 TYPE_LENGTH (type
) = read_huge_number (pp
, 0, &nbits
, 0);
3343 return error_type (pp
, objfile
);
3346 /* Now read the baseclasses, if any, read the regular C struct or C++
3347 class member fields, attach the fields to the type, read the C++
3348 member functions, attach them to the type, and then read any tilde
3349 field (baseclass specifier for the class holding the main vtable). */
3351 if (!read_baseclasses (&fi
, pp
, type
, objfile
)
3352 || !read_struct_fields (&fi
, pp
, type
, objfile
)
3353 || !attach_fields_to_type (&fi
, type
, objfile
)
3354 || !read_member_functions (&fi
, pp
, type
, objfile
)
3355 || !attach_fn_fields_to_type (&fi
, type
)
3356 || !read_tilde_fields (&fi
, pp
, type
, objfile
))
3358 type
= error_type (pp
, objfile
);
3361 do_cleanups (back_to
);
3365 /* Read a definition of an array type,
3366 and create and return a suitable type object.
3367 Also creates a range type which represents the bounds of that
3370 static struct type
*
3371 read_array_type (char **pp
, struct type
*type
,
3372 struct objfile
*objfile
)
3374 struct type
*index_type
, *element_type
, *range_type
;
3379 /* Format of an array type:
3380 "ar<index type>;lower;upper;<array_contents_type>".
3381 OS9000: "arlower,upper;<array_contents_type>".
3383 Fortran adjustable arrays use Adigits or Tdigits for lower or upper;
3384 for these, produce a type like float[][]. */
3387 index_type
= read_type (pp
, objfile
);
3389 /* Improper format of array type decl. */
3390 return error_type (pp
, objfile
);
3394 if (!(**pp
>= '0' && **pp
<= '9') && **pp
!= '-')
3399 lower
= read_huge_number (pp
, ';', &nbits
, 0);
3402 return error_type (pp
, objfile
);
3404 if (!(**pp
>= '0' && **pp
<= '9') && **pp
!= '-')
3409 upper
= read_huge_number (pp
, ';', &nbits
, 0);
3411 return error_type (pp
, objfile
);
3413 element_type
= read_type (pp
, objfile
);
3422 create_range_type ((struct type
*) NULL
, index_type
, lower
, upper
);
3423 type
= create_array_type (type
, element_type
, range_type
);
3429 /* Read a definition of an enumeration type,
3430 and create and return a suitable type object.
3431 Also defines the symbols that represent the values of the type. */
3433 static struct type
*
3434 read_enum_type (char **pp
, struct type
*type
,
3435 struct objfile
*objfile
)
3437 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
3443 struct pending
**symlist
;
3444 struct pending
*osyms
, *syms
;
3447 int unsigned_enum
= 1;
3450 /* FIXME! The stabs produced by Sun CC merrily define things that ought
3451 to be file-scope, between N_FN entries, using N_LSYM. What's a mother
3452 to do? For now, force all enum values to file scope. */
3453 if (within_function
)
3454 symlist
= &local_symbols
;
3457 symlist
= &file_symbols
;
3459 o_nsyms
= osyms
? osyms
->nsyms
: 0;
3461 /* The aix4 compiler emits an extra field before the enum members;
3462 my guess is it's a type of some sort. Just ignore it. */
3465 /* Skip over the type. */
3469 /* Skip over the colon. */
3473 /* Read the value-names and their values.
3474 The input syntax is NAME:VALUE,NAME:VALUE, and so on.
3475 A semicolon or comma instead of a NAME means the end. */
3476 while (**pp
&& **pp
!= ';' && **pp
!= ',')
3478 STABS_CONTINUE (pp
, objfile
);
3482 name
= obsavestring (*pp
, p
- *pp
, &objfile
->objfile_obstack
);
3484 n
= read_huge_number (pp
, ',', &nbits
, 0);
3486 return error_type (pp
, objfile
);
3488 sym
= (struct symbol
*)
3489 obstack_alloc (&objfile
->objfile_obstack
, sizeof (struct symbol
));
3490 memset (sym
, 0, sizeof (struct symbol
));
3491 DEPRECATED_SYMBOL_NAME (sym
) = name
;
3492 SYMBOL_LANGUAGE (sym
) = current_subfile
->language
;
3493 SYMBOL_CLASS (sym
) = LOC_CONST
;
3494 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
3495 SYMBOL_VALUE (sym
) = n
;
3498 add_symbol_to_list (sym
, symlist
);
3503 (*pp
)++; /* Skip the semicolon. */
3505 /* Now fill in the fields of the type-structure. */
3507 TYPE_LENGTH (type
) = gdbarch_int_bit (gdbarch
) / HOST_CHAR_BIT
;
3508 TYPE_CODE (type
) = TYPE_CODE_ENUM
;
3509 TYPE_FLAGS (type
) &= ~TYPE_FLAG_STUB
;
3511 TYPE_FLAGS (type
) |= TYPE_FLAG_UNSIGNED
;
3512 TYPE_NFIELDS (type
) = nsyms
;
3513 TYPE_FIELDS (type
) = (struct field
*)
3514 TYPE_ALLOC (type
, sizeof (struct field
) * nsyms
);
3515 memset (TYPE_FIELDS (type
), 0, sizeof (struct field
) * nsyms
);
3517 /* Find the symbols for the values and put them into the type.
3518 The symbols can be found in the symlist that we put them on
3519 to cause them to be defined. osyms contains the old value
3520 of that symlist; everything up to there was defined by us. */
3521 /* Note that we preserve the order of the enum constants, so
3522 that in something like "enum {FOO, LAST_THING=FOO}" we print
3523 FOO, not LAST_THING. */
3525 for (syms
= *symlist
, n
= nsyms
- 1; syms
; syms
= syms
->next
)
3527 int last
= syms
== osyms
? o_nsyms
: 0;
3528 int j
= syms
->nsyms
;
3529 for (; --j
>= last
; --n
)
3531 struct symbol
*xsym
= syms
->symbol
[j
];
3532 SYMBOL_TYPE (xsym
) = type
;
3533 TYPE_FIELD_NAME (type
, n
) = DEPRECATED_SYMBOL_NAME (xsym
);
3534 TYPE_FIELD_BITPOS (type
, n
) = SYMBOL_VALUE (xsym
);
3535 TYPE_FIELD_BITSIZE (type
, n
) = 0;
3544 /* Sun's ACC uses a somewhat saner method for specifying the builtin
3545 typedefs in every file (for int, long, etc):
3547 type = b <signed> <width> <format type>; <offset>; <nbits>
3549 optional format type = c or b for char or boolean.
3550 offset = offset from high order bit to start bit of type.
3551 width is # bytes in object of this type, nbits is # bits in type.
3553 The width/offset stuff appears to be for small objects stored in
3554 larger ones (e.g. `shorts' in `int' registers). We ignore it for now,
3557 static struct type
*
3558 read_sun_builtin_type (char **pp
, int typenums
[2], struct objfile
*objfile
)
3563 enum type_code code
= TYPE_CODE_INT
;
3574 return error_type (pp
, objfile
);
3578 /* For some odd reason, all forms of char put a c here. This is strange
3579 because no other type has this honor. We can safely ignore this because
3580 we actually determine 'char'acterness by the number of bits specified in
3582 Boolean forms, e.g Fortran logical*X, put a b here. */
3586 else if (**pp
== 'b')
3588 code
= TYPE_CODE_BOOL
;
3592 /* The first number appears to be the number of bytes occupied
3593 by this type, except that unsigned short is 4 instead of 2.
3594 Since this information is redundant with the third number,
3595 we will ignore it. */
3596 read_huge_number (pp
, ';', &nbits
, 0);
3598 return error_type (pp
, objfile
);
3600 /* The second number is always 0, so ignore it too. */
3601 read_huge_number (pp
, ';', &nbits
, 0);
3603 return error_type (pp
, objfile
);
3605 /* The third number is the number of bits for this type. */
3606 type_bits
= read_huge_number (pp
, 0, &nbits
, 0);
3608 return error_type (pp
, objfile
);
3609 /* The type *should* end with a semicolon. If it are embedded
3610 in a larger type the semicolon may be the only way to know where
3611 the type ends. If this type is at the end of the stabstring we
3612 can deal with the omitted semicolon (but we don't have to like
3613 it). Don't bother to complain(), Sun's compiler omits the semicolon
3619 return init_type (TYPE_CODE_VOID
, 1,
3620 signed_type
? 0 : TYPE_FLAG_UNSIGNED
, (char *) NULL
,
3623 return init_type (code
,
3624 type_bits
/ TARGET_CHAR_BIT
,
3625 signed_type
? 0 : TYPE_FLAG_UNSIGNED
, (char *) NULL
,
3629 static struct type
*
3630 read_sun_floating_type (char **pp
, int typenums
[2], struct objfile
*objfile
)
3635 struct type
*rettype
;
3637 /* The first number has more details about the type, for example
3639 details
= read_huge_number (pp
, ';', &nbits
, 0);
3641 return error_type (pp
, objfile
);
3643 /* The second number is the number of bytes occupied by this type */
3644 nbytes
= read_huge_number (pp
, ';', &nbits
, 0);
3646 return error_type (pp
, objfile
);
3648 if (details
== NF_COMPLEX
|| details
== NF_COMPLEX16
3649 || details
== NF_COMPLEX32
)
3651 rettype
= init_type (TYPE_CODE_COMPLEX
, nbytes
, 0, NULL
, objfile
);
3652 TYPE_TARGET_TYPE (rettype
)
3653 = init_type (TYPE_CODE_FLT
, nbytes
/ 2, 0, NULL
, objfile
);
3657 return init_type (TYPE_CODE_FLT
, nbytes
, 0, NULL
, objfile
);
3660 /* Read a number from the string pointed to by *PP.
3661 The value of *PP is advanced over the number.
3662 If END is nonzero, the character that ends the
3663 number must match END, or an error happens;
3664 and that character is skipped if it does match.
3665 If END is zero, *PP is left pointing to that character.
3667 If TWOS_COMPLEMENT_BITS is set to a strictly positive value and if
3668 the number is represented in an octal representation, assume that
3669 it is represented in a 2's complement representation with a size of
3670 TWOS_COMPLEMENT_BITS.
3672 If the number fits in a long, set *BITS to 0 and return the value.
3673 If not, set *BITS to be the number of bits in the number and return 0.
3675 If encounter garbage, set *BITS to -1 and return 0. */
3678 read_huge_number (char **pp
, int end
, int *bits
, int twos_complement_bits
)
3689 int twos_complement_representation
= 0;
3697 /* Leading zero means octal. GCC uses this to output values larger
3698 than an int (because that would be hard in decimal). */
3705 /* Skip extra zeros. */
3709 if (sign
> 0 && radix
== 8 && twos_complement_bits
> 0)
3711 /* Octal, possibly signed. Check if we have enough chars for a
3716 while ((c
= *p1
) >= '0' && c
< '8')
3720 if (len
> twos_complement_bits
/ 3
3721 || (twos_complement_bits
% 3 == 0 && len
== twos_complement_bits
/ 3))
3723 /* Ok, we have enough characters for a signed value, check
3724 for signness by testing if the sign bit is set. */
3725 sign_bit
= (twos_complement_bits
% 3 + 2) % 3;
3727 if (c
& (1 << sign_bit
))
3729 /* Definitely signed. */
3730 twos_complement_representation
= 1;
3736 upper_limit
= LONG_MAX
/ radix
;
3738 while ((c
= *p
++) >= '0' && c
< ('0' + radix
))
3740 if (n
<= upper_limit
)
3742 if (twos_complement_representation
)
3744 /* Octal, signed, twos complement representation. In
3745 this case, n is the corresponding absolute value. */
3748 long sn
= c
- '0' - ((2 * (c
- '0')) | (2 << sign_bit
));
3759 /* unsigned representation */
3761 n
+= c
- '0'; /* FIXME this overflows anyway */
3767 /* This depends on large values being output in octal, which is
3774 /* Ignore leading zeroes. */
3778 else if (c
== '2' || c
== '3')
3799 if (radix
== 8 && twos_complement_bits
> 0 && nbits
> twos_complement_bits
)
3801 /* We were supposed to parse a number with maximum
3802 TWOS_COMPLEMENT_BITS bits, but something went wrong. */
3813 /* Large decimal constants are an error (because it is hard to
3814 count how many bits are in them). */
3820 /* -0x7f is the same as 0x80. So deal with it by adding one to
3821 the number of bits. Two's complement represention octals
3822 can't have a '-' in front. */
3823 if (sign
== -1 && !twos_complement_representation
)
3834 /* It's *BITS which has the interesting information. */
3838 static struct type
*
3839 read_range_type (char **pp
, int typenums
[2], int type_size
,
3840 struct objfile
*objfile
)
3842 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
3843 char *orig_pp
= *pp
;
3848 struct type
*result_type
;
3849 struct type
*index_type
= NULL
;
3851 /* First comes a type we are a subrange of.
3852 In C it is usually 0, 1 or the type being defined. */
3853 if (read_type_number (pp
, rangenums
) != 0)
3854 return error_type (pp
, objfile
);
3855 self_subrange
= (rangenums
[0] == typenums
[0] &&
3856 rangenums
[1] == typenums
[1]);
3861 index_type
= read_type (pp
, objfile
);
3864 /* A semicolon should now follow; skip it. */
3868 /* The remaining two operands are usually lower and upper bounds
3869 of the range. But in some special cases they mean something else. */
3870 n2
= read_huge_number (pp
, ';', &n2bits
, type_size
);
3871 n3
= read_huge_number (pp
, ';', &n3bits
, type_size
);
3873 if (n2bits
== -1 || n3bits
== -1)
3874 return error_type (pp
, objfile
);
3877 goto handle_true_range
;
3879 /* If limits are huge, must be large integral type. */
3880 if (n2bits
!= 0 || n3bits
!= 0)
3882 char got_signed
= 0;
3883 char got_unsigned
= 0;
3884 /* Number of bits in the type. */
3887 /* If a type size attribute has been specified, the bounds of
3888 the range should fit in this size. If the lower bounds needs
3889 more bits than the upper bound, then the type is signed. */
3890 if (n2bits
<= type_size
&& n3bits
<= type_size
)
3892 if (n2bits
== type_size
&& n2bits
> n3bits
)
3898 /* Range from 0 to <large number> is an unsigned large integral type. */
3899 else if ((n2bits
== 0 && n2
== 0) && n3bits
!= 0)
3904 /* Range from <large number> to <large number>-1 is a large signed
3905 integral type. Take care of the case where <large number> doesn't
3906 fit in a long but <large number>-1 does. */
3907 else if ((n2bits
!= 0 && n3bits
!= 0 && n2bits
== n3bits
+ 1)
3908 || (n2bits
!= 0 && n3bits
== 0
3909 && (n2bits
== sizeof (long) * HOST_CHAR_BIT
)
3916 if (got_signed
|| got_unsigned
)
3918 return init_type (TYPE_CODE_INT
, nbits
/ TARGET_CHAR_BIT
,
3919 got_unsigned
? TYPE_FLAG_UNSIGNED
: 0, NULL
,
3923 return error_type (pp
, objfile
);
3926 /* A type defined as a subrange of itself, with bounds both 0, is void. */
3927 if (self_subrange
&& n2
== 0 && n3
== 0)
3928 return init_type (TYPE_CODE_VOID
, 1, 0, NULL
, objfile
);
3930 /* If n3 is zero and n2 is positive, we want a floating type, and n2
3931 is the width in bytes.
3933 Fortran programs appear to use this for complex types also. To
3934 distinguish between floats and complex, g77 (and others?) seem
3935 to use self-subranges for the complexes, and subranges of int for
3938 Also note that for complexes, g77 sets n2 to the size of one of
3939 the member floats, not the whole complex beast. My guess is that
3940 this was to work well with pre-COMPLEX versions of gdb. */
3942 if (n3
== 0 && n2
> 0)
3944 struct type
*float_type
3945 = init_type (TYPE_CODE_FLT
, n2
, 0, NULL
, objfile
);
3949 struct type
*complex_type
=
3950 init_type (TYPE_CODE_COMPLEX
, 2 * n2
, 0, NULL
, objfile
);
3951 TYPE_TARGET_TYPE (complex_type
) = float_type
;
3952 return complex_type
;
3958 /* If the upper bound is -1, it must really be an unsigned integral. */
3960 else if (n2
== 0 && n3
== -1)
3962 int bits
= type_size
;
3965 /* We don't know its size. It is unsigned int or unsigned
3966 long. GCC 2.3.3 uses this for long long too, but that is
3967 just a GDB 3.5 compatibility hack. */
3968 bits
= gdbarch_int_bit (gdbarch
);
3971 return init_type (TYPE_CODE_INT
, bits
/ TARGET_CHAR_BIT
,
3972 TYPE_FLAG_UNSIGNED
, NULL
, objfile
);
3975 /* Special case: char is defined (Who knows why) as a subrange of
3976 itself with range 0-127. */
3977 else if (self_subrange
&& n2
== 0 && n3
== 127)
3978 return init_type (TYPE_CODE_INT
, 1, TYPE_FLAG_NOSIGN
, NULL
, objfile
);
3980 /* We used to do this only for subrange of self or subrange of int. */
3983 /* -1 is used for the upper bound of (4 byte) "unsigned int" and
3984 "unsigned long", and we already checked for that,
3985 so don't need to test for it here. */
3988 /* n3 actually gives the size. */
3989 return init_type (TYPE_CODE_INT
, -n3
, TYPE_FLAG_UNSIGNED
,
3992 /* Is n3 == 2**(8n)-1 for some integer n? Then it's an
3993 unsigned n-byte integer. But do require n to be a power of
3994 two; we don't want 3- and 5-byte integers flying around. */
4000 for (bytes
= 0; (bits
& 0xff) == 0xff; bytes
++)
4003 && ((bytes
- 1) & bytes
) == 0) /* "bytes is a power of two" */
4004 return init_type (TYPE_CODE_INT
, bytes
, TYPE_FLAG_UNSIGNED
, NULL
,
4008 /* I think this is for Convex "long long". Since I don't know whether
4009 Convex sets self_subrange, I also accept that particular size regardless
4010 of self_subrange. */
4011 else if (n3
== 0 && n2
< 0
4013 || n2
== -gdbarch_long_long_bit
4014 (gdbarch
) / TARGET_CHAR_BIT
))
4015 return init_type (TYPE_CODE_INT
, -n2
, 0, NULL
, objfile
);
4016 else if (n2
== -n3
- 1)
4019 return init_type (TYPE_CODE_INT
, 1, 0, NULL
, objfile
);
4021 return init_type (TYPE_CODE_INT
, 2, 0, NULL
, objfile
);
4022 if (n3
== 0x7fffffff)
4023 return init_type (TYPE_CODE_INT
, 4, 0, NULL
, objfile
);
4026 /* We have a real range type on our hands. Allocate space and
4027 return a real pointer. */
4031 index_type
= builtin_type (gdbarch
)->builtin_int
;
4033 index_type
= *dbx_lookup_type (rangenums
);
4034 if (index_type
== NULL
)
4036 /* Does this actually ever happen? Is that why we are worrying
4037 about dealing with it rather than just calling error_type? */
4039 complaint (&symfile_complaints
,
4040 _("base type %d of range type is not defined"), rangenums
[1]);
4042 index_type
= builtin_type (gdbarch
)->builtin_int
;
4045 result_type
= create_range_type ((struct type
*) NULL
, index_type
, n2
, n3
);
4046 return (result_type
);
4049 /* Read in an argument list. This is a list of types, separated by commas
4050 and terminated with END. Return the list of types read in, or NULL
4051 if there is an error. */
4053 static struct field
*
4054 read_args (char **pp
, int end
, struct objfile
*objfile
, int *nargsp
,
4057 /* FIXME! Remove this arbitrary limit! */
4058 struct type
*types
[1024]; /* allow for fns of 1023 parameters */
4065 /* Invalid argument list: no ','. */
4068 STABS_CONTINUE (pp
, objfile
);
4069 types
[n
++] = read_type (pp
, objfile
);
4071 (*pp
)++; /* get past `end' (the ':' character) */
4073 if (TYPE_CODE (types
[n
- 1]) != TYPE_CODE_VOID
)
4081 rval
= (struct field
*) xmalloc (n
* sizeof (struct field
));
4082 memset (rval
, 0, n
* sizeof (struct field
));
4083 for (i
= 0; i
< n
; i
++)
4084 rval
[i
].type
= types
[i
];
4089 /* Common block handling. */
4091 /* List of symbols declared since the last BCOMM. This list is a tail
4092 of local_symbols. When ECOMM is seen, the symbols on the list
4093 are noted so their proper addresses can be filled in later,
4094 using the common block base address gotten from the assembler
4097 static struct pending
*common_block
;
4098 static int common_block_i
;
4100 /* Name of the current common block. We get it from the BCOMM instead of the
4101 ECOMM to match IBM documentation (even though IBM puts the name both places
4102 like everyone else). */
4103 static char *common_block_name
;
4105 /* Process a N_BCOMM symbol. The storage for NAME is not guaranteed
4106 to remain after this function returns. */
4109 common_block_start (char *name
, struct objfile
*objfile
)
4111 if (common_block_name
!= NULL
)
4113 complaint (&symfile_complaints
,
4114 _("Invalid symbol data: common block within common block"));
4116 common_block
= local_symbols
;
4117 common_block_i
= local_symbols
? local_symbols
->nsyms
: 0;
4118 common_block_name
= obsavestring (name
, strlen (name
),
4119 &objfile
->objfile_obstack
);
4122 /* Process a N_ECOMM symbol. */
4125 common_block_end (struct objfile
*objfile
)
4127 /* Symbols declared since the BCOMM are to have the common block
4128 start address added in when we know it. common_block and
4129 common_block_i point to the first symbol after the BCOMM in
4130 the local_symbols list; copy the list and hang it off the
4131 symbol for the common block name for later fixup. */
4134 struct pending
*new = 0;
4135 struct pending
*next
;
4138 if (common_block_name
== NULL
)
4140 complaint (&symfile_complaints
, _("ECOMM symbol unmatched by BCOMM"));
4144 sym
= (struct symbol
*)
4145 obstack_alloc (&objfile
->objfile_obstack
, sizeof (struct symbol
));
4146 memset (sym
, 0, sizeof (struct symbol
));
4147 /* Note: common_block_name already saved on objfile_obstack */
4148 DEPRECATED_SYMBOL_NAME (sym
) = common_block_name
;
4149 SYMBOL_CLASS (sym
) = LOC_BLOCK
;
4151 /* Now we copy all the symbols which have been defined since the BCOMM. */
4153 /* Copy all the struct pendings before common_block. */
4154 for (next
= local_symbols
;
4155 next
!= NULL
&& next
!= common_block
;
4158 for (j
= 0; j
< next
->nsyms
; j
++)
4159 add_symbol_to_list (next
->symbol
[j
], &new);
4162 /* Copy however much of COMMON_BLOCK we need. If COMMON_BLOCK is
4163 NULL, it means copy all the local symbols (which we already did
4166 if (common_block
!= NULL
)
4167 for (j
= common_block_i
; j
< common_block
->nsyms
; j
++)
4168 add_symbol_to_list (common_block
->symbol
[j
], &new);
4170 SYMBOL_TYPE (sym
) = (struct type
*) new;
4172 /* Should we be putting local_symbols back to what it was?
4175 i
= hashname (DEPRECATED_SYMBOL_NAME (sym
));
4176 SYMBOL_VALUE_CHAIN (sym
) = global_sym_chain
[i
];
4177 global_sym_chain
[i
] = sym
;
4178 common_block_name
= NULL
;
4181 /* Add a common block's start address to the offset of each symbol
4182 declared to be in it (by being between a BCOMM/ECOMM pair that uses
4183 the common block name). */
4186 fix_common_block (struct symbol
*sym
, int valu
)
4188 struct pending
*next
= (struct pending
*) SYMBOL_TYPE (sym
);
4189 for (; next
; next
= next
->next
)
4192 for (j
= next
->nsyms
- 1; j
>= 0; j
--)
4193 SYMBOL_VALUE_ADDRESS (next
->symbol
[j
]) += valu
;
4199 /* Add {TYPE, TYPENUMS} to the NONAME_UNDEFS vector.
4200 See add_undefined_type for more details. */
4203 add_undefined_type_noname (struct type
*type
, int typenums
[2])
4207 nat
.typenums
[0] = typenums
[0];
4208 nat
.typenums
[1] = typenums
[1];
4211 if (noname_undefs_length
== noname_undefs_allocated
)
4213 noname_undefs_allocated
*= 2;
4214 noname_undefs
= (struct nat
*)
4215 xrealloc ((char *) noname_undefs
,
4216 noname_undefs_allocated
* sizeof (struct nat
));
4218 noname_undefs
[noname_undefs_length
++] = nat
;
4221 /* Add TYPE to the UNDEF_TYPES vector.
4222 See add_undefined_type for more details. */
4225 add_undefined_type_1 (struct type
*type
)
4227 if (undef_types_length
== undef_types_allocated
)
4229 undef_types_allocated
*= 2;
4230 undef_types
= (struct type
**)
4231 xrealloc ((char *) undef_types
,
4232 undef_types_allocated
* sizeof (struct type
*));
4234 undef_types
[undef_types_length
++] = type
;
4237 /* What about types defined as forward references inside of a small lexical
4239 /* Add a type to the list of undefined types to be checked through
4240 once this file has been read in.
4242 In practice, we actually maintain two such lists: The first list
4243 (UNDEF_TYPES) is used for types whose name has been provided, and
4244 concerns forward references (eg 'xs' or 'xu' forward references);
4245 the second list (NONAME_UNDEFS) is used for types whose name is
4246 unknown at creation time, because they were referenced through
4247 their type number before the actual type was declared.
4248 This function actually adds the given type to the proper list. */
4251 add_undefined_type (struct type
*type
, int typenums
[2])
4253 if (TYPE_TAG_NAME (type
) == NULL
)
4254 add_undefined_type_noname (type
, typenums
);
4256 add_undefined_type_1 (type
);
4259 /* Try to fix all undefined types pushed on the UNDEF_TYPES vector. */
4262 cleanup_undefined_types_noname (void)
4266 for (i
= 0; i
< noname_undefs_length
; i
++)
4268 struct nat nat
= noname_undefs
[i
];
4271 type
= dbx_lookup_type (nat
.typenums
);
4272 if (nat
.type
!= *type
&& TYPE_CODE (*type
) != TYPE_CODE_UNDEF
)
4274 /* The instance flags of the undefined type are still unset,
4275 and needs to be copied over from the reference type.
4276 Since replace_type expects them to be identical, we need
4277 to set these flags manually before hand. */
4278 TYPE_INSTANCE_FLAGS (nat
.type
) = TYPE_INSTANCE_FLAGS (*type
);
4279 replace_type (nat
.type
, *type
);
4283 noname_undefs_length
= 0;
4286 /* Go through each undefined type, see if it's still undefined, and fix it
4287 up if possible. We have two kinds of undefined types:
4289 TYPE_CODE_ARRAY: Array whose target type wasn't defined yet.
4290 Fix: update array length using the element bounds
4291 and the target type's length.
4292 TYPE_CODE_STRUCT, TYPE_CODE_UNION: Structure whose fields were not
4293 yet defined at the time a pointer to it was made.
4294 Fix: Do a full lookup on the struct/union tag. */
4297 cleanup_undefined_types_1 (void)
4301 /* Iterate over every undefined type, and look for a symbol whose type
4302 matches our undefined type. The symbol matches if:
4303 1. It is a typedef in the STRUCT domain;
4304 2. It has the same name, and same type code;
4305 3. The instance flags are identical.
4307 It is important to check the instance flags, because we have seen
4308 examples where the debug info contained definitions such as:
4310 "foo_t:t30=B31=xefoo_t:"
4312 In this case, we have created an undefined type named "foo_t" whose
4313 instance flags is null (when processing "xefoo_t"), and then created
4314 another type with the same name, but with different instance flags
4315 ('B' means volatile). I think that the definition above is wrong,
4316 since the same type cannot be volatile and non-volatile at the same
4317 time, but we need to be able to cope with it when it happens. The
4318 approach taken here is to treat these two types as different. */
4320 for (type
= undef_types
; type
< undef_types
+ undef_types_length
; type
++)
4322 switch (TYPE_CODE (*type
))
4325 case TYPE_CODE_STRUCT
:
4326 case TYPE_CODE_UNION
:
4327 case TYPE_CODE_ENUM
:
4329 /* Check if it has been defined since. Need to do this here
4330 as well as in check_typedef to deal with the (legitimate in
4331 C though not C++) case of several types with the same name
4332 in different source files. */
4333 if (TYPE_STUB (*type
))
4335 struct pending
*ppt
;
4337 /* Name of the type, without "struct" or "union" */
4338 char *typename
= TYPE_TAG_NAME (*type
);
4340 if (typename
== NULL
)
4342 complaint (&symfile_complaints
, _("need a type name"));
4345 for (ppt
= file_symbols
; ppt
; ppt
= ppt
->next
)
4347 for (i
= 0; i
< ppt
->nsyms
; i
++)
4349 struct symbol
*sym
= ppt
->symbol
[i
];
4351 if (SYMBOL_CLASS (sym
) == LOC_TYPEDEF
4352 && SYMBOL_DOMAIN (sym
) == STRUCT_DOMAIN
4353 && (TYPE_CODE (SYMBOL_TYPE (sym
)) ==
4355 && (TYPE_INSTANCE_FLAGS (*type
) ==
4356 TYPE_INSTANCE_FLAGS (SYMBOL_TYPE (sym
)))
4357 && strcmp (DEPRECATED_SYMBOL_NAME (sym
),
4359 replace_type (*type
, SYMBOL_TYPE (sym
));
4368 complaint (&symfile_complaints
,
4369 _("forward-referenced types left unresolved, "
4377 undef_types_length
= 0;
4380 /* Try to fix all the undefined types we ecountered while processing
4384 cleanup_undefined_types (void)
4386 cleanup_undefined_types_1 ();
4387 cleanup_undefined_types_noname ();
4390 /* Scan through all of the global symbols defined in the object file,
4391 assigning values to the debugging symbols that need to be assigned
4392 to. Get these symbols from the minimal symbol table. */
4395 scan_file_globals (struct objfile
*objfile
)
4398 struct minimal_symbol
*msymbol
;
4399 struct symbol
*sym
, *prev
;
4400 struct objfile
*resolve_objfile
;
4402 /* SVR4 based linkers copy referenced global symbols from shared
4403 libraries to the main executable.
4404 If we are scanning the symbols for a shared library, try to resolve
4405 them from the minimal symbols of the main executable first. */
4407 if (symfile_objfile
&& objfile
!= symfile_objfile
)
4408 resolve_objfile
= symfile_objfile
;
4410 resolve_objfile
= objfile
;
4414 /* Avoid expensive loop through all minimal symbols if there are
4415 no unresolved symbols. */
4416 for (hash
= 0; hash
< HASHSIZE
; hash
++)
4418 if (global_sym_chain
[hash
])
4421 if (hash
>= HASHSIZE
)
4424 for (msymbol
= resolve_objfile
->msymbols
;
4425 msymbol
&& DEPRECATED_SYMBOL_NAME (msymbol
) != NULL
;
4430 /* Skip static symbols. */
4431 switch (MSYMBOL_TYPE (msymbol
))
4443 /* Get the hash index and check all the symbols
4444 under that hash index. */
4446 hash
= hashname (DEPRECATED_SYMBOL_NAME (msymbol
));
4448 for (sym
= global_sym_chain
[hash
]; sym
;)
4450 if (DEPRECATED_SYMBOL_NAME (msymbol
)[0] == DEPRECATED_SYMBOL_NAME (sym
)[0] &&
4451 strcmp (DEPRECATED_SYMBOL_NAME (msymbol
) + 1, DEPRECATED_SYMBOL_NAME (sym
) + 1) == 0)
4453 /* Splice this symbol out of the hash chain and
4454 assign the value we have to it. */
4457 SYMBOL_VALUE_CHAIN (prev
) = SYMBOL_VALUE_CHAIN (sym
);
4461 global_sym_chain
[hash
] = SYMBOL_VALUE_CHAIN (sym
);
4464 /* Check to see whether we need to fix up a common block. */
4465 /* Note: this code might be executed several times for
4466 the same symbol if there are multiple references. */
4469 if (SYMBOL_CLASS (sym
) == LOC_BLOCK
)
4471 fix_common_block (sym
,
4472 SYMBOL_VALUE_ADDRESS (msymbol
));
4476 SYMBOL_VALUE_ADDRESS (sym
)
4477 = SYMBOL_VALUE_ADDRESS (msymbol
);
4479 SYMBOL_SECTION (sym
) = SYMBOL_SECTION (msymbol
);
4484 sym
= SYMBOL_VALUE_CHAIN (prev
);
4488 sym
= global_sym_chain
[hash
];
4494 sym
= SYMBOL_VALUE_CHAIN (sym
);
4498 if (resolve_objfile
== objfile
)
4500 resolve_objfile
= objfile
;
4503 /* Change the storage class of any remaining unresolved globals to
4504 LOC_UNRESOLVED and remove them from the chain. */
4505 for (hash
= 0; hash
< HASHSIZE
; hash
++)
4507 sym
= global_sym_chain
[hash
];
4511 sym
= SYMBOL_VALUE_CHAIN (sym
);
4513 /* Change the symbol address from the misleading chain value
4515 SYMBOL_VALUE_ADDRESS (prev
) = 0;
4517 /* Complain about unresolved common block symbols. */
4518 if (SYMBOL_CLASS (prev
) == LOC_STATIC
)
4519 SYMBOL_CLASS (prev
) = LOC_UNRESOLVED
;
4521 complaint (&symfile_complaints
,
4522 _("%s: common block `%s' from global_sym_chain unresolved"),
4523 objfile
->name
, DEPRECATED_SYMBOL_NAME (prev
));
4526 memset (global_sym_chain
, 0, sizeof (global_sym_chain
));
4529 /* Initialize anything that needs initializing when starting to read
4530 a fresh piece of a symbol file, e.g. reading in the stuff corresponding
4534 stabsread_init (void)
4538 /* Initialize anything that needs initializing when a completely new
4539 symbol file is specified (not just adding some symbols from another
4540 file, e.g. a shared library). */
4543 stabsread_new_init (void)
4545 /* Empty the hash table of global syms looking for values. */
4546 memset (global_sym_chain
, 0, sizeof (global_sym_chain
));
4549 /* Initialize anything that needs initializing at the same time as
4550 start_symtab() is called. */
4555 global_stabs
= NULL
; /* AIX COFF */
4556 /* Leave FILENUM of 0 free for builtin types and this file's types. */
4557 n_this_object_header_files
= 1;
4558 type_vector_length
= 0;
4559 type_vector
= (struct type
**) 0;
4561 /* FIXME: If common_block_name is not already NULL, we should complain(). */
4562 common_block_name
= NULL
;
4565 /* Call after end_symtab() */
4572 xfree (type_vector
);
4575 type_vector_length
= 0;
4576 previous_stab_code
= 0;
4580 finish_global_stabs (struct objfile
*objfile
)
4584 patch_block_stabs (global_symbols
, global_stabs
, objfile
);
4585 xfree (global_stabs
);
4586 global_stabs
= NULL
;
4590 /* Find the end of the name, delimited by a ':', but don't match
4591 ObjC symbols which look like -[Foo bar::]:bla. */
4593 find_name_end (char *name
)
4596 if (s
[0] == '-' || *s
== '+')
4598 /* Must be an ObjC method symbol. */
4601 error (_("invalid symbol name \"%s\""), name
);
4603 s
= strchr (s
, ']');
4606 error (_("invalid symbol name \"%s\""), name
);
4608 return strchr (s
, ':');
4612 return strchr (s
, ':');
4616 /* Initializer for this module */
4619 _initialize_stabsread (void)
4621 undef_types_allocated
= 20;
4622 undef_types_length
= 0;
4623 undef_types
= (struct type
**)
4624 xmalloc (undef_types_allocated
* sizeof (struct type
*));
4626 noname_undefs_allocated
= 20;
4627 noname_undefs_length
= 0;
4628 noname_undefs
= (struct nat
*)
4629 xmalloc (noname_undefs_allocated
* sizeof (struct nat
));