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 add_symbol_to_list (sym
, &local_symbols
);
935 if (gdbarch_byte_order (gdbarch
) != BFD_ENDIAN_BIG
)
937 /* On little-endian machines, this crud is never necessary,
938 and, if the extra bytes contain garbage, is harmful. */
942 /* If it's gcc-compiled, if it says `short', believe it. */
943 if (processing_gcc_compilation
944 || gdbarch_believe_pcc_promotion (gdbarch
))
947 if (!gdbarch_believe_pcc_promotion (gdbarch
))
949 /* If PCC says a parameter is a short or a char, it is
951 if (TYPE_LENGTH (SYMBOL_TYPE (sym
))
952 < gdbarch_int_bit (gdbarch
) / TARGET_CHAR_BIT
953 && TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_INT
)
956 TYPE_UNSIGNED (SYMBOL_TYPE (sym
))
957 ? builtin_type (gdbarch
)->builtin_unsigned_int
958 : builtin_type (gdbarch
)->builtin_int
;
964 /* acc seems to use P to declare the prototypes of functions that
965 are referenced by this file. gdb is not prepared to deal
966 with this extra information. FIXME, it ought to. */
969 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
970 goto process_prototype_types
;
975 /* Parameter which is in a register. */
976 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
977 SYMBOL_CLASS (sym
) = LOC_REGPARM
;
978 SYMBOL_VALUE (sym
) = gdbarch_stab_reg_to_regnum (current_gdbarch
, valu
);
979 if (SYMBOL_VALUE (sym
) >= gdbarch_num_regs (current_gdbarch
)
980 + gdbarch_num_pseudo_regs (current_gdbarch
))
982 reg_value_complaint (SYMBOL_VALUE (sym
),
983 gdbarch_num_regs (current_gdbarch
)
984 + gdbarch_num_pseudo_regs (current_gdbarch
),
985 SYMBOL_PRINT_NAME (sym
));
986 SYMBOL_VALUE (sym
) = gdbarch_sp_regnum (current_gdbarch
);
987 /* Known safe, though useless */
989 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
990 add_symbol_to_list (sym
, &local_symbols
);
994 /* Register variable (either global or local). */
995 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
996 SYMBOL_CLASS (sym
) = LOC_REGISTER
;
997 SYMBOL_VALUE (sym
) = gdbarch_stab_reg_to_regnum (current_gdbarch
, valu
);
998 if (SYMBOL_VALUE (sym
) >= gdbarch_num_regs (current_gdbarch
)
999 + gdbarch_num_pseudo_regs (current_gdbarch
))
1001 reg_value_complaint (SYMBOL_VALUE (sym
),
1002 gdbarch_num_regs (current_gdbarch
)
1003 + gdbarch_num_pseudo_regs (current_gdbarch
),
1004 SYMBOL_PRINT_NAME (sym
));
1005 SYMBOL_VALUE (sym
) = gdbarch_sp_regnum (current_gdbarch
);
1006 /* Known safe, though useless */
1008 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1009 if (within_function
)
1011 /* Sun cc uses a pair of symbols, one 'p' and one 'r', with
1012 the same name to represent an argument passed in a
1013 register. GCC uses 'P' for the same case. So if we find
1014 such a symbol pair we combine it into one 'P' symbol.
1015 For Sun cc we need to do this regardless of
1016 stabs_argument_has_addr, because the compiler puts out
1017 the 'p' symbol even if it never saves the argument onto
1020 On most machines, we want to preserve both symbols, so
1021 that we can still get information about what is going on
1022 with the stack (VAX for computing args_printed, using
1023 stack slots instead of saved registers in backtraces,
1026 Note that this code illegally combines
1027 main(argc) struct foo argc; { register struct foo argc; }
1028 but this case is considered pathological and causes a warning
1029 from a decent compiler. */
1032 && local_symbols
->nsyms
> 0
1033 && gdbarch_stabs_argument_has_addr (gdbarch
, SYMBOL_TYPE (sym
)))
1035 struct symbol
*prev_sym
;
1036 prev_sym
= local_symbols
->symbol
[local_symbols
->nsyms
- 1];
1037 if ((SYMBOL_CLASS (prev_sym
) == LOC_REF_ARG
1038 || SYMBOL_CLASS (prev_sym
) == LOC_ARG
)
1039 && strcmp (DEPRECATED_SYMBOL_NAME (prev_sym
),
1040 DEPRECATED_SYMBOL_NAME (sym
)) == 0)
1042 SYMBOL_CLASS (prev_sym
) = LOC_REGPARM
;
1043 /* Use the type from the LOC_REGISTER; that is the type
1044 that is actually in that register. */
1045 SYMBOL_TYPE (prev_sym
) = SYMBOL_TYPE (sym
);
1046 SYMBOL_VALUE (prev_sym
) = SYMBOL_VALUE (sym
);
1051 add_symbol_to_list (sym
, &local_symbols
);
1054 add_symbol_to_list (sym
, &file_symbols
);
1058 /* Static symbol at top level of file */
1059 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
1060 SYMBOL_CLASS (sym
) = LOC_STATIC
;
1061 SYMBOL_VALUE_ADDRESS (sym
) = valu
;
1062 if (gdbarch_static_transform_name_p (gdbarch
)
1063 && gdbarch_static_transform_name (gdbarch
,
1064 DEPRECATED_SYMBOL_NAME (sym
))
1065 != DEPRECATED_SYMBOL_NAME (sym
))
1067 struct minimal_symbol
*msym
;
1068 msym
= lookup_minimal_symbol (DEPRECATED_SYMBOL_NAME (sym
), NULL
, objfile
);
1071 DEPRECATED_SYMBOL_NAME (sym
) = gdbarch_static_transform_name
1073 DEPRECATED_SYMBOL_NAME (sym
));
1074 SYMBOL_VALUE_ADDRESS (sym
) = SYMBOL_VALUE_ADDRESS (msym
);
1077 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1078 add_symbol_to_list (sym
, &file_symbols
);
1082 /* In Ada, there is no distinction between typedef and non-typedef;
1083 any type declaration implicitly has the equivalent of a typedef,
1084 and thus 't' is in fact equivalent to 'Tt'.
1086 Therefore, for Ada units, we check the character immediately
1087 before the 't', and if we do not find a 'T', then make sure to
1088 create the associated symbol in the STRUCT_DOMAIN ('t' definitions
1089 will be stored in the VAR_DOMAIN). If the symbol was indeed
1090 defined as 'Tt' then the STRUCT_DOMAIN symbol will be created
1091 elsewhere, so we don't need to take care of that.
1093 This is important to do, because of forward references:
1094 The cleanup of undefined types stored in undef_types only uses
1095 STRUCT_DOMAIN symbols to perform the replacement. */
1096 synonym
= (SYMBOL_LANGUAGE (sym
) == language_ada
&& p
[-2] != 'T');
1099 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
1101 /* For a nameless type, we don't want a create a symbol, thus we
1102 did not use `sym'. Return without further processing. */
1106 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
1107 SYMBOL_VALUE (sym
) = valu
;
1108 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1109 /* C++ vagaries: we may have a type which is derived from
1110 a base type which did not have its name defined when the
1111 derived class was output. We fill in the derived class's
1112 base part member's name here in that case. */
1113 if (TYPE_NAME (SYMBOL_TYPE (sym
)) != NULL
)
1114 if ((TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_STRUCT
1115 || TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_UNION
)
1116 && TYPE_N_BASECLASSES (SYMBOL_TYPE (sym
)))
1119 for (j
= TYPE_N_BASECLASSES (SYMBOL_TYPE (sym
)) - 1; j
>= 0; j
--)
1120 if (TYPE_BASECLASS_NAME (SYMBOL_TYPE (sym
), j
) == 0)
1121 TYPE_BASECLASS_NAME (SYMBOL_TYPE (sym
), j
) =
1122 type_name_no_tag (TYPE_BASECLASS (SYMBOL_TYPE (sym
), j
));
1125 if (TYPE_NAME (SYMBOL_TYPE (sym
)) == NULL
)
1127 /* gcc-2.6 or later (when using -fvtable-thunks)
1128 emits a unique named type for a vtable entry.
1129 Some gdb code depends on that specific name. */
1130 extern const char vtbl_ptr_name
[];
1132 if ((TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_PTR
1133 && strcmp (DEPRECATED_SYMBOL_NAME (sym
), vtbl_ptr_name
))
1134 || TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_FUNC
)
1136 /* If we are giving a name to a type such as "pointer to
1137 foo" or "function returning foo", we better not set
1138 the TYPE_NAME. If the program contains "typedef char
1139 *caddr_t;", we don't want all variables of type char
1140 * to print as caddr_t. This is not just a
1141 consequence of GDB's type management; PCC and GCC (at
1142 least through version 2.4) both output variables of
1143 either type char * or caddr_t with the type number
1144 defined in the 't' symbol for caddr_t. If a future
1145 compiler cleans this up it GDB is not ready for it
1146 yet, but if it becomes ready we somehow need to
1147 disable this check (without breaking the PCC/GCC2.4
1152 Fortunately, this check seems not to be necessary
1153 for anything except pointers or functions. */
1154 /* ezannoni: 2000-10-26. This seems to apply for
1155 versions of gcc older than 2.8. This was the original
1156 problem: with the following code gdb would tell that
1157 the type for name1 is caddr_t, and func is char()
1158 typedef char *caddr_t;
1170 /* Pascal accepts names for pointer types. */
1171 if (current_subfile
->language
== language_pascal
)
1173 TYPE_NAME (SYMBOL_TYPE (sym
)) = DEPRECATED_SYMBOL_NAME (sym
);
1177 TYPE_NAME (SYMBOL_TYPE (sym
)) = DEPRECATED_SYMBOL_NAME (sym
);
1180 add_symbol_to_list (sym
, &file_symbols
);
1184 /* Create the STRUCT_DOMAIN clone. */
1185 struct symbol
*struct_sym
= (struct symbol
*)
1186 obstack_alloc (&objfile
->objfile_obstack
, sizeof (struct symbol
));
1189 SYMBOL_CLASS (struct_sym
) = LOC_TYPEDEF
;
1190 SYMBOL_VALUE (struct_sym
) = valu
;
1191 SYMBOL_DOMAIN (struct_sym
) = STRUCT_DOMAIN
;
1192 if (TYPE_NAME (SYMBOL_TYPE (sym
)) == 0)
1193 TYPE_NAME (SYMBOL_TYPE (sym
))
1194 = obconcat (&objfile
->objfile_obstack
, "", "",
1195 DEPRECATED_SYMBOL_NAME (sym
));
1196 add_symbol_to_list (struct_sym
, &file_symbols
);
1202 /* Struct, union, or enum tag. For GNU C++, this can be be followed
1203 by 't' which means we are typedef'ing it as well. */
1204 synonym
= *p
== 't';
1209 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
1211 /* For a nameless type, we don't want a create a symbol, thus we
1212 did not use `sym'. Return without further processing. */
1216 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
1217 SYMBOL_VALUE (sym
) = valu
;
1218 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
1219 if (TYPE_TAG_NAME (SYMBOL_TYPE (sym
)) == 0)
1220 TYPE_TAG_NAME (SYMBOL_TYPE (sym
))
1221 = obconcat (&objfile
->objfile_obstack
, "", "", DEPRECATED_SYMBOL_NAME (sym
));
1222 add_symbol_to_list (sym
, &file_symbols
);
1226 /* Clone the sym and then modify it. */
1227 struct symbol
*typedef_sym
= (struct symbol
*)
1228 obstack_alloc (&objfile
->objfile_obstack
, sizeof (struct symbol
));
1229 *typedef_sym
= *sym
;
1230 SYMBOL_CLASS (typedef_sym
) = LOC_TYPEDEF
;
1231 SYMBOL_VALUE (typedef_sym
) = valu
;
1232 SYMBOL_DOMAIN (typedef_sym
) = VAR_DOMAIN
;
1233 if (TYPE_NAME (SYMBOL_TYPE (sym
)) == 0)
1234 TYPE_NAME (SYMBOL_TYPE (sym
))
1235 = obconcat (&objfile
->objfile_obstack
, "", "", DEPRECATED_SYMBOL_NAME (sym
));
1236 add_symbol_to_list (typedef_sym
, &file_symbols
);
1241 /* Static symbol of local scope */
1242 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
1243 SYMBOL_CLASS (sym
) = LOC_STATIC
;
1244 SYMBOL_VALUE_ADDRESS (sym
) = valu
;
1245 if (gdbarch_static_transform_name_p (gdbarch
)
1246 && gdbarch_static_transform_name (gdbarch
,
1247 DEPRECATED_SYMBOL_NAME (sym
))
1248 != DEPRECATED_SYMBOL_NAME (sym
))
1250 struct minimal_symbol
*msym
;
1251 msym
= lookup_minimal_symbol (DEPRECATED_SYMBOL_NAME (sym
), NULL
, objfile
);
1254 DEPRECATED_SYMBOL_NAME (sym
) = gdbarch_static_transform_name
1256 DEPRECATED_SYMBOL_NAME (sym
));
1257 SYMBOL_VALUE_ADDRESS (sym
) = SYMBOL_VALUE_ADDRESS (msym
);
1260 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1261 add_symbol_to_list (sym
, &local_symbols
);
1265 /* Reference parameter */
1266 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
1267 SYMBOL_CLASS (sym
) = LOC_REF_ARG
;
1268 SYMBOL_VALUE (sym
) = valu
;
1269 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1270 add_symbol_to_list (sym
, &local_symbols
);
1274 /* Reference parameter which is in a register. */
1275 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
1276 SYMBOL_CLASS (sym
) = LOC_REGPARM_ADDR
;
1277 SYMBOL_VALUE (sym
) = gdbarch_stab_reg_to_regnum (current_gdbarch
, valu
);
1278 if (SYMBOL_VALUE (sym
) >= gdbarch_num_regs (current_gdbarch
)
1279 + gdbarch_num_pseudo_regs (current_gdbarch
))
1281 reg_value_complaint (SYMBOL_VALUE (sym
),
1282 gdbarch_num_regs (current_gdbarch
)
1283 + gdbarch_num_pseudo_regs (current_gdbarch
),
1284 SYMBOL_PRINT_NAME (sym
));
1285 SYMBOL_VALUE (sym
) = gdbarch_sp_regnum (current_gdbarch
);
1286 /* Known safe, though useless */
1288 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1289 add_symbol_to_list (sym
, &local_symbols
);
1293 /* This is used by Sun FORTRAN for "function result value".
1294 Sun claims ("dbx and dbxtool interfaces", 2nd ed)
1295 that Pascal uses it too, but when I tried it Pascal used
1296 "x:3" (local symbol) instead. */
1297 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
1298 SYMBOL_CLASS (sym
) = LOC_LOCAL
;
1299 SYMBOL_VALUE (sym
) = valu
;
1300 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1301 add_symbol_to_list (sym
, &local_symbols
);
1305 SYMBOL_TYPE (sym
) = error_type (&p
, objfile
);
1306 SYMBOL_CLASS (sym
) = LOC_CONST
;
1307 SYMBOL_VALUE (sym
) = 0;
1308 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1309 add_symbol_to_list (sym
, &file_symbols
);
1313 /* Some systems pass variables of certain types by reference instead
1314 of by value, i.e. they will pass the address of a structure (in a
1315 register or on the stack) instead of the structure itself. */
1317 if (gdbarch_stabs_argument_has_addr (gdbarch
, SYMBOL_TYPE (sym
))
1318 && (SYMBOL_CLASS (sym
) == LOC_REGPARM
|| SYMBOL_CLASS (sym
) == LOC_ARG
))
1320 /* We have to convert LOC_REGPARM to LOC_REGPARM_ADDR (for
1321 variables passed in a register). */
1322 if (SYMBOL_CLASS (sym
) == LOC_REGPARM
)
1323 SYMBOL_CLASS (sym
) = LOC_REGPARM_ADDR
;
1324 /* Likewise for converting LOC_ARG to LOC_REF_ARG (for the 7th
1325 and subsequent arguments on SPARC, for example). */
1326 else if (SYMBOL_CLASS (sym
) == LOC_ARG
)
1327 SYMBOL_CLASS (sym
) = LOC_REF_ARG
;
1333 /* Skip rest of this symbol and return an error type.
1335 General notes on error recovery: error_type always skips to the
1336 end of the symbol (modulo cretinous dbx symbol name continuation).
1337 Thus code like this:
1339 if (*(*pp)++ != ';')
1340 return error_type (pp, objfile);
1342 is wrong because if *pp starts out pointing at '\0' (typically as the
1343 result of an earlier error), it will be incremented to point to the
1344 start of the next symbol, which might produce strange results, at least
1345 if you run off the end of the string table. Instead use
1348 return error_type (pp, objfile);
1354 foo = error_type (pp, objfile);
1358 And in case it isn't obvious, the point of all this hair is so the compiler
1359 can define new types and new syntaxes, and old versions of the
1360 debugger will be able to read the new symbol tables. */
1362 static struct type
*
1363 error_type (char **pp
, struct objfile
*objfile
)
1365 complaint (&symfile_complaints
, _("couldn't parse type; debugger out of date?"));
1368 /* Skip to end of symbol. */
1369 while (**pp
!= '\0')
1374 /* Check for and handle cretinous dbx symbol name continuation! */
1375 if ((*pp
)[-1] == '\\' || (*pp
)[-1] == '?')
1377 *pp
= next_symbol_text (objfile
);
1384 return (builtin_type_error
);
1388 /* Read type information or a type definition; return the type. Even
1389 though this routine accepts either type information or a type
1390 definition, the distinction is relevant--some parts of stabsread.c
1391 assume that type information starts with a digit, '-', or '(' in
1392 deciding whether to call read_type. */
1394 static struct type
*
1395 read_type (char **pp
, struct objfile
*objfile
)
1397 struct type
*type
= 0;
1400 char type_descriptor
;
1402 /* Size in bits of type if specified by a type attribute, or -1 if
1403 there is no size attribute. */
1406 /* Used to distinguish string and bitstring from char-array and set. */
1409 /* Used to distinguish vector from array. */
1412 /* Read type number if present. The type number may be omitted.
1413 for instance in a two-dimensional array declared with type
1414 "ar1;1;10;ar1;1;10;4". */
1415 if ((**pp
>= '0' && **pp
<= '9')
1419 if (read_type_number (pp
, typenums
) != 0)
1420 return error_type (pp
, objfile
);
1424 /* Type is not being defined here. Either it already
1425 exists, or this is a forward reference to it.
1426 dbx_alloc_type handles both cases. */
1427 type
= dbx_alloc_type (typenums
, objfile
);
1429 /* If this is a forward reference, arrange to complain if it
1430 doesn't get patched up by the time we're done
1432 if (TYPE_CODE (type
) == TYPE_CODE_UNDEF
)
1433 add_undefined_type (type
, typenums
);
1438 /* Type is being defined here. */
1440 Also skip the type descriptor - we get it below with (*pp)[-1]. */
1445 /* 'typenums=' not present, type is anonymous. Read and return
1446 the definition, but don't put it in the type vector. */
1447 typenums
[0] = typenums
[1] = -1;
1452 type_descriptor
= (*pp
)[-1];
1453 switch (type_descriptor
)
1457 enum type_code code
;
1459 /* Used to index through file_symbols. */
1460 struct pending
*ppt
;
1463 /* Name including "struct", etc. */
1467 char *from
, *to
, *p
, *q1
, *q2
;
1469 /* Set the type code according to the following letter. */
1473 code
= TYPE_CODE_STRUCT
;
1476 code
= TYPE_CODE_UNION
;
1479 code
= TYPE_CODE_ENUM
;
1483 /* Complain and keep going, so compilers can invent new
1484 cross-reference types. */
1485 complaint (&symfile_complaints
,
1486 _("Unrecognized cross-reference type `%c'"), (*pp
)[0]);
1487 code
= TYPE_CODE_STRUCT
;
1492 q1
= strchr (*pp
, '<');
1493 p
= strchr (*pp
, ':');
1495 return error_type (pp
, objfile
);
1496 if (q1
&& p
> q1
&& p
[1] == ':')
1498 int nesting_level
= 0;
1499 for (q2
= q1
; *q2
; q2
++)
1503 else if (*q2
== '>')
1505 else if (*q2
== ':' && nesting_level
== 0)
1510 return error_type (pp
, objfile
);
1513 (char *) obstack_alloc (&objfile
->objfile_obstack
, p
- *pp
+ 1);
1515 /* Copy the name. */
1521 /* Set the pointer ahead of the name which we just read, and
1526 /* If this type has already been declared, then reuse the same
1527 type, rather than allocating a new one. This saves some
1530 for (ppt
= file_symbols
; ppt
; ppt
= ppt
->next
)
1531 for (i
= 0; i
< ppt
->nsyms
; i
++)
1533 struct symbol
*sym
= ppt
->symbol
[i
];
1535 if (SYMBOL_CLASS (sym
) == LOC_TYPEDEF
1536 && SYMBOL_DOMAIN (sym
) == STRUCT_DOMAIN
1537 && (TYPE_CODE (SYMBOL_TYPE (sym
)) == code
)
1538 && strcmp (DEPRECATED_SYMBOL_NAME (sym
), type_name
) == 0)
1540 obstack_free (&objfile
->objfile_obstack
, type_name
);
1541 type
= SYMBOL_TYPE (sym
);
1542 if (typenums
[0] != -1)
1543 *dbx_lookup_type (typenums
) = type
;
1548 /* Didn't find the type to which this refers, so we must
1549 be dealing with a forward reference. Allocate a type
1550 structure for it, and keep track of it so we can
1551 fill in the rest of the fields when we get the full
1553 type
= dbx_alloc_type (typenums
, objfile
);
1554 TYPE_CODE (type
) = code
;
1555 TYPE_TAG_NAME (type
) = type_name
;
1556 INIT_CPLUS_SPECIFIC (type
);
1557 TYPE_FLAGS (type
) |= TYPE_FLAG_STUB
;
1559 add_undefined_type (type
, typenums
);
1563 case '-': /* RS/6000 built-in type */
1577 /* We deal with something like t(1,2)=(3,4)=... which
1578 the Lucid compiler and recent gcc versions (post 2.7.3) use. */
1580 /* Allocate and enter the typedef type first.
1581 This handles recursive types. */
1582 type
= dbx_alloc_type (typenums
, objfile
);
1583 TYPE_CODE (type
) = TYPE_CODE_TYPEDEF
;
1585 struct type
*xtype
= read_type (pp
, objfile
);
1588 /* It's being defined as itself. That means it is "void". */
1589 TYPE_CODE (type
) = TYPE_CODE_VOID
;
1590 TYPE_LENGTH (type
) = 1;
1592 else if (type_size
>= 0 || is_string
)
1594 /* This is the absolute wrong way to construct types. Every
1595 other debug format has found a way around this problem and
1596 the related problems with unnecessarily stubbed types;
1597 someone motivated should attempt to clean up the issue
1598 here as well. Once a type pointed to has been created it
1599 should not be modified.
1601 Well, it's not *absolutely* wrong. Constructing recursive
1602 types (trees, linked lists) necessarily entails modifying
1603 types after creating them. Constructing any loop structure
1604 entails side effects. The Dwarf 2 reader does handle this
1605 more gracefully (it never constructs more than once
1606 instance of a type object, so it doesn't have to copy type
1607 objects wholesale), but it still mutates type objects after
1608 other folks have references to them.
1610 Keep in mind that this circularity/mutation issue shows up
1611 at the source language level, too: C's "incomplete types",
1612 for example. So the proper cleanup, I think, would be to
1613 limit GDB's type smashing to match exactly those required
1614 by the source language. So GDB could have a
1615 "complete_this_type" function, but never create unnecessary
1616 copies of a type otherwise. */
1617 replace_type (type
, xtype
);
1618 TYPE_NAME (type
) = NULL
;
1619 TYPE_TAG_NAME (type
) = NULL
;
1623 TYPE_FLAGS (type
) |= TYPE_FLAG_TARGET_STUB
;
1624 TYPE_TARGET_TYPE (type
) = xtype
;
1629 /* In the following types, we must be sure to overwrite any existing
1630 type that the typenums refer to, rather than allocating a new one
1631 and making the typenums point to the new one. This is because there
1632 may already be pointers to the existing type (if it had been
1633 forward-referenced), and we must change it to a pointer, function,
1634 reference, or whatever, *in-place*. */
1636 case '*': /* Pointer to another type */
1637 type1
= read_type (pp
, objfile
);
1638 type
= make_pointer_type (type1
, dbx_lookup_type (typenums
));
1641 case '&': /* Reference to another type */
1642 type1
= read_type (pp
, objfile
);
1643 type
= make_reference_type (type1
, dbx_lookup_type (typenums
));
1646 case 'f': /* Function returning another type */
1647 type1
= read_type (pp
, objfile
);
1648 type
= make_function_type (type1
, dbx_lookup_type (typenums
));
1651 case 'g': /* Prototyped function. (Sun) */
1653 /* Unresolved questions:
1655 - According to Sun's ``STABS Interface Manual'', for 'f'
1656 and 'F' symbol descriptors, a `0' in the argument type list
1657 indicates a varargs function. But it doesn't say how 'g'
1658 type descriptors represent that info. Someone with access
1659 to Sun's toolchain should try it out.
1661 - According to the comment in define_symbol (search for
1662 `process_prototype_types:'), Sun emits integer arguments as
1663 types which ref themselves --- like `void' types. Do we
1664 have to deal with that here, too? Again, someone with
1665 access to Sun's toolchain should try it out and let us
1668 const char *type_start
= (*pp
) - 1;
1669 struct type
*return_type
= read_type (pp
, objfile
);
1670 struct type
*func_type
1671 = make_function_type (return_type
, dbx_lookup_type (typenums
));
1674 struct type_list
*next
;
1678 while (**pp
&& **pp
!= '#')
1680 struct type
*arg_type
= read_type (pp
, objfile
);
1681 struct type_list
*new = alloca (sizeof (*new));
1682 new->type
= arg_type
;
1683 new->next
= arg_types
;
1691 complaint (&symfile_complaints
,
1692 _("Prototyped function type didn't end arguments with `#':\n%s"),
1696 /* If there is just one argument whose type is `void', then
1697 that's just an empty argument list. */
1699 && ! arg_types
->next
1700 && TYPE_CODE (arg_types
->type
) == TYPE_CODE_VOID
)
1703 TYPE_FIELDS (func_type
)
1704 = (struct field
*) TYPE_ALLOC (func_type
,
1705 num_args
* sizeof (struct field
));
1706 memset (TYPE_FIELDS (func_type
), 0, num_args
* sizeof (struct field
));
1709 struct type_list
*t
;
1711 /* We stuck each argument type onto the front of the list
1712 when we read it, so the list is reversed. Build the
1713 fields array right-to-left. */
1714 for (t
= arg_types
, i
= num_args
- 1; t
; t
= t
->next
, i
--)
1715 TYPE_FIELD_TYPE (func_type
, i
) = t
->type
;
1717 TYPE_NFIELDS (func_type
) = num_args
;
1718 TYPE_FLAGS (func_type
) |= TYPE_FLAG_PROTOTYPED
;
1724 case 'k': /* Const qualifier on some type (Sun) */
1725 type
= read_type (pp
, objfile
);
1726 type
= make_cv_type (1, TYPE_VOLATILE (type
), type
,
1727 dbx_lookup_type (typenums
));
1730 case 'B': /* Volatile qual on some type (Sun) */
1731 type
= read_type (pp
, objfile
);
1732 type
= make_cv_type (TYPE_CONST (type
), 1, type
,
1733 dbx_lookup_type (typenums
));
1737 if (isdigit (**pp
) || **pp
== '(' || **pp
== '-')
1738 { /* Member (class & variable) type */
1739 /* FIXME -- we should be doing smash_to_XXX types here. */
1741 struct type
*domain
= read_type (pp
, objfile
);
1742 struct type
*memtype
;
1745 /* Invalid member type data format. */
1746 return error_type (pp
, objfile
);
1749 memtype
= read_type (pp
, objfile
);
1750 type
= dbx_alloc_type (typenums
, objfile
);
1751 smash_to_memberptr_type (type
, domain
, memtype
);
1754 /* type attribute */
1757 /* Skip to the semicolon. */
1758 while (**pp
!= ';' && **pp
!= '\0')
1761 return error_type (pp
, objfile
);
1763 ++ * pp
; /* Skip the semicolon. */
1767 case 's': /* Size attribute */
1768 type_size
= atoi (attr
+ 1);
1773 case 'S': /* String attribute */
1774 /* FIXME: check to see if following type is array? */
1778 case 'V': /* Vector attribute */
1779 /* FIXME: check to see if following type is array? */
1784 /* Ignore unrecognized type attributes, so future compilers
1785 can invent new ones. */
1793 case '#': /* Method (class & fn) type */
1794 if ((*pp
)[0] == '#')
1796 /* We'll get the parameter types from the name. */
1797 struct type
*return_type
;
1800 return_type
= read_type (pp
, objfile
);
1801 if (*(*pp
)++ != ';')
1802 complaint (&symfile_complaints
,
1803 _("invalid (minimal) member type data format at symtab pos %d."),
1805 type
= allocate_stub_method (return_type
);
1806 if (typenums
[0] != -1)
1807 *dbx_lookup_type (typenums
) = type
;
1811 struct type
*domain
= read_type (pp
, objfile
);
1812 struct type
*return_type
;
1817 /* Invalid member type data format. */
1818 return error_type (pp
, objfile
);
1822 return_type
= read_type (pp
, objfile
);
1823 args
= read_args (pp
, ';', objfile
, &nargs
, &varargs
);
1825 return error_type (pp
, objfile
);
1826 type
= dbx_alloc_type (typenums
, objfile
);
1827 smash_to_method_type (type
, domain
, return_type
, args
,
1832 case 'r': /* Range type */
1833 type
= read_range_type (pp
, typenums
, type_size
, objfile
);
1834 if (typenums
[0] != -1)
1835 *dbx_lookup_type (typenums
) = type
;
1840 /* Sun ACC builtin int type */
1841 type
= read_sun_builtin_type (pp
, typenums
, objfile
);
1842 if (typenums
[0] != -1)
1843 *dbx_lookup_type (typenums
) = type
;
1847 case 'R': /* Sun ACC builtin float type */
1848 type
= read_sun_floating_type (pp
, typenums
, objfile
);
1849 if (typenums
[0] != -1)
1850 *dbx_lookup_type (typenums
) = type
;
1853 case 'e': /* Enumeration type */
1854 type
= dbx_alloc_type (typenums
, objfile
);
1855 type
= read_enum_type (pp
, type
, objfile
);
1856 if (typenums
[0] != -1)
1857 *dbx_lookup_type (typenums
) = type
;
1860 case 's': /* Struct type */
1861 case 'u': /* Union type */
1863 enum type_code type_code
= TYPE_CODE_UNDEF
;
1864 type
= dbx_alloc_type (typenums
, objfile
);
1865 switch (type_descriptor
)
1868 type_code
= TYPE_CODE_STRUCT
;
1871 type_code
= TYPE_CODE_UNION
;
1874 type
= read_struct_type (pp
, type
, type_code
, objfile
);
1878 case 'a': /* Array type */
1880 return error_type (pp
, objfile
);
1883 type
= dbx_alloc_type (typenums
, objfile
);
1884 type
= read_array_type (pp
, type
, objfile
);
1886 TYPE_CODE (type
) = TYPE_CODE_STRING
;
1888 make_vector_type (type
);
1891 case 'S': /* Set or bitstring type */
1892 type1
= read_type (pp
, objfile
);
1893 type
= create_set_type ((struct type
*) NULL
, type1
);
1895 TYPE_CODE (type
) = TYPE_CODE_BITSTRING
;
1896 if (typenums
[0] != -1)
1897 *dbx_lookup_type (typenums
) = type
;
1901 --*pp
; /* Go back to the symbol in error */
1902 /* Particularly important if it was \0! */
1903 return error_type (pp
, objfile
);
1908 warning (_("GDB internal error, type is NULL in stabsread.c."));
1909 return error_type (pp
, objfile
);
1912 /* Size specified in a type attribute overrides any other size. */
1913 if (type_size
!= -1)
1914 TYPE_LENGTH (type
) = (type_size
+ TARGET_CHAR_BIT
- 1) / TARGET_CHAR_BIT
;
1919 /* RS/6000 xlc/dbx combination uses a set of builtin types, starting from -1.
1920 Return the proper type node for a given builtin type number. */
1922 static struct type
*
1923 rs6000_builtin_type (int typenum
)
1925 /* We recognize types numbered from -NUMBER_RECOGNIZED to -1. */
1926 #define NUMBER_RECOGNIZED 34
1927 /* This includes an empty slot for type number -0. */
1928 static struct type
*negative_types
[NUMBER_RECOGNIZED
+ 1];
1929 struct type
*rettype
= NULL
;
1931 if (typenum
>= 0 || typenum
< -NUMBER_RECOGNIZED
)
1933 complaint (&symfile_complaints
, _("Unknown builtin type %d"), typenum
);
1934 return builtin_type_error
;
1936 if (negative_types
[-typenum
] != NULL
)
1937 return negative_types
[-typenum
];
1939 #if TARGET_CHAR_BIT != 8
1940 #error This code wrong for TARGET_CHAR_BIT not 8
1941 /* These definitions all assume that TARGET_CHAR_BIT is 8. I think
1942 that if that ever becomes not true, the correct fix will be to
1943 make the size in the struct type to be in bits, not in units of
1950 /* The size of this and all the other types are fixed, defined
1951 by the debugging format. If there is a type called "int" which
1952 is other than 32 bits, then it should use a new negative type
1953 number (or avoid negative type numbers for that case).
1954 See stabs.texinfo. */
1955 rettype
= init_type (TYPE_CODE_INT
, 4, 0, "int", NULL
);
1958 rettype
= init_type (TYPE_CODE_INT
, 1, 0, "char", NULL
);
1961 rettype
= init_type (TYPE_CODE_INT
, 2, 0, "short", NULL
);
1964 rettype
= init_type (TYPE_CODE_INT
, 4, 0, "long", NULL
);
1967 rettype
= init_type (TYPE_CODE_INT
, 1, TYPE_FLAG_UNSIGNED
,
1968 "unsigned char", NULL
);
1971 rettype
= init_type (TYPE_CODE_INT
, 1, 0, "signed char", NULL
);
1974 rettype
= init_type (TYPE_CODE_INT
, 2, TYPE_FLAG_UNSIGNED
,
1975 "unsigned short", NULL
);
1978 rettype
= init_type (TYPE_CODE_INT
, 4, TYPE_FLAG_UNSIGNED
,
1979 "unsigned int", NULL
);
1982 rettype
= init_type (TYPE_CODE_INT
, 4, TYPE_FLAG_UNSIGNED
,
1985 rettype
= init_type (TYPE_CODE_INT
, 4, TYPE_FLAG_UNSIGNED
,
1986 "unsigned long", NULL
);
1989 rettype
= init_type (TYPE_CODE_VOID
, 1, 0, "void", NULL
);
1992 /* IEEE single precision (32 bit). */
1993 rettype
= init_type (TYPE_CODE_FLT
, 4, 0, "float", NULL
);
1996 /* IEEE double precision (64 bit). */
1997 rettype
= init_type (TYPE_CODE_FLT
, 8, 0, "double", NULL
);
2000 /* This is an IEEE double on the RS/6000, and different machines with
2001 different sizes for "long double" should use different negative
2002 type numbers. See stabs.texinfo. */
2003 rettype
= init_type (TYPE_CODE_FLT
, 8, 0, "long double", NULL
);
2006 rettype
= init_type (TYPE_CODE_INT
, 4, 0, "integer", NULL
);
2009 rettype
= init_type (TYPE_CODE_BOOL
, 4, TYPE_FLAG_UNSIGNED
,
2013 rettype
= init_type (TYPE_CODE_FLT
, 4, 0, "short real", NULL
);
2016 rettype
= init_type (TYPE_CODE_FLT
, 8, 0, "real", NULL
);
2019 rettype
= init_type (TYPE_CODE_ERROR
, 0, 0, "stringptr", NULL
);
2022 rettype
= init_type (TYPE_CODE_CHAR
, 1, TYPE_FLAG_UNSIGNED
,
2026 rettype
= init_type (TYPE_CODE_BOOL
, 1, TYPE_FLAG_UNSIGNED
,
2030 rettype
= init_type (TYPE_CODE_BOOL
, 2, TYPE_FLAG_UNSIGNED
,
2034 rettype
= init_type (TYPE_CODE_BOOL
, 4, TYPE_FLAG_UNSIGNED
,
2038 rettype
= init_type (TYPE_CODE_BOOL
, 4, TYPE_FLAG_UNSIGNED
,
2042 /* Complex type consisting of two IEEE single precision values. */
2043 rettype
= init_type (TYPE_CODE_COMPLEX
, 8, 0, "complex", NULL
);
2044 TYPE_TARGET_TYPE (rettype
) = init_type (TYPE_CODE_FLT
, 4, 0, "float",
2048 /* Complex type consisting of two IEEE double precision values. */
2049 rettype
= init_type (TYPE_CODE_COMPLEX
, 16, 0, "double complex", NULL
);
2050 TYPE_TARGET_TYPE (rettype
) = init_type (TYPE_CODE_FLT
, 8, 0, "double",
2054 rettype
= init_type (TYPE_CODE_INT
, 1, 0, "integer*1", NULL
);
2057 rettype
= init_type (TYPE_CODE_INT
, 2, 0, "integer*2", NULL
);
2060 rettype
= init_type (TYPE_CODE_INT
, 4, 0, "integer*4", NULL
);
2063 rettype
= init_type (TYPE_CODE_CHAR
, 2, 0, "wchar", NULL
);
2066 rettype
= init_type (TYPE_CODE_INT
, 8, 0, "long long", NULL
);
2069 rettype
= init_type (TYPE_CODE_INT
, 8, TYPE_FLAG_UNSIGNED
,
2070 "unsigned long long", NULL
);
2073 rettype
= init_type (TYPE_CODE_INT
, 8, TYPE_FLAG_UNSIGNED
,
2077 rettype
= init_type (TYPE_CODE_INT
, 8, 0, "integer*8", NULL
);
2080 negative_types
[-typenum
] = rettype
;
2084 /* This page contains subroutines of read_type. */
2086 /* Replace *OLD_NAME with the method name portion of PHYSNAME. */
2089 update_method_name_from_physname (char **old_name
, char *physname
)
2093 method_name
= method_name_from_physname (physname
);
2095 if (method_name
== NULL
)
2097 complaint (&symfile_complaints
,
2098 _("Method has bad physname %s\n"), physname
);
2102 if (strcmp (*old_name
, method_name
) != 0)
2105 *old_name
= method_name
;
2108 xfree (method_name
);
2111 /* Read member function stabs info for C++ classes. The form of each member
2114 NAME :: TYPENUM[=type definition] ARGS : PHYSNAME ;
2116 An example with two member functions is:
2118 afunc1::20=##15;:i;2A.;afunc2::20:i;2A.;
2120 For the case of overloaded operators, the format is op$::*.funcs, where
2121 $ is the CPLUS_MARKER (usually '$'), `*' holds the place for an operator
2122 name (such as `+=') and `.' marks the end of the operator name.
2124 Returns 1 for success, 0 for failure. */
2127 read_member_functions (struct field_info
*fip
, char **pp
, struct type
*type
,
2128 struct objfile
*objfile
)
2132 /* Total number of member functions defined in this class. If the class
2133 defines two `f' functions, and one `g' function, then this will have
2135 int total_length
= 0;
2139 struct next_fnfield
*next
;
2140 struct fn_field fn_field
;
2143 struct type
*look_ahead_type
;
2144 struct next_fnfieldlist
*new_fnlist
;
2145 struct next_fnfield
*new_sublist
;
2149 /* Process each list until we find something that is not a member function
2150 or find the end of the functions. */
2154 /* We should be positioned at the start of the function name.
2155 Scan forward to find the first ':' and if it is not the
2156 first of a "::" delimiter, then this is not a member function. */
2168 look_ahead_type
= NULL
;
2171 new_fnlist
= (struct next_fnfieldlist
*)
2172 xmalloc (sizeof (struct next_fnfieldlist
));
2173 make_cleanup (xfree
, new_fnlist
);
2174 memset (new_fnlist
, 0, sizeof (struct next_fnfieldlist
));
2176 if ((*pp
)[0] == 'o' && (*pp
)[1] == 'p' && is_cplus_marker ((*pp
)[2]))
2178 /* This is a completely wierd case. In order to stuff in the
2179 names that might contain colons (the usual name delimiter),
2180 Mike Tiemann defined a different name format which is
2181 signalled if the identifier is "op$". In that case, the
2182 format is "op$::XXXX." where XXXX is the name. This is
2183 used for names like "+" or "=". YUUUUUUUK! FIXME! */
2184 /* This lets the user type "break operator+".
2185 We could just put in "+" as the name, but that wouldn't
2187 static char opname
[32] = "op$";
2188 char *o
= opname
+ 3;
2190 /* Skip past '::'. */
2193 STABS_CONTINUE (pp
, objfile
);
2199 main_fn_name
= savestring (opname
, o
- opname
);
2205 main_fn_name
= savestring (*pp
, p
- *pp
);
2206 /* Skip past '::'. */
2209 new_fnlist
->fn_fieldlist
.name
= main_fn_name
;
2214 (struct next_fnfield
*) xmalloc (sizeof (struct next_fnfield
));
2215 make_cleanup (xfree
, new_sublist
);
2216 memset (new_sublist
, 0, sizeof (struct next_fnfield
));
2218 /* Check for and handle cretinous dbx symbol name continuation! */
2219 if (look_ahead_type
== NULL
)
2222 STABS_CONTINUE (pp
, objfile
);
2224 new_sublist
->fn_field
.type
= read_type (pp
, objfile
);
2227 /* Invalid symtab info for member function. */
2233 /* g++ version 1 kludge */
2234 new_sublist
->fn_field
.type
= look_ahead_type
;
2235 look_ahead_type
= NULL
;
2245 /* If this is just a stub, then we don't have the real name here. */
2247 if (TYPE_STUB (new_sublist
->fn_field
.type
))
2249 if (!TYPE_DOMAIN_TYPE (new_sublist
->fn_field
.type
))
2250 TYPE_DOMAIN_TYPE (new_sublist
->fn_field
.type
) = type
;
2251 new_sublist
->fn_field
.is_stub
= 1;
2253 new_sublist
->fn_field
.physname
= savestring (*pp
, p
- *pp
);
2256 /* Set this member function's visibility fields. */
2259 case VISIBILITY_PRIVATE
:
2260 new_sublist
->fn_field
.is_private
= 1;
2262 case VISIBILITY_PROTECTED
:
2263 new_sublist
->fn_field
.is_protected
= 1;
2267 STABS_CONTINUE (pp
, objfile
);
2270 case 'A': /* Normal functions. */
2271 new_sublist
->fn_field
.is_const
= 0;
2272 new_sublist
->fn_field
.is_volatile
= 0;
2275 case 'B': /* `const' member functions. */
2276 new_sublist
->fn_field
.is_const
= 1;
2277 new_sublist
->fn_field
.is_volatile
= 0;
2280 case 'C': /* `volatile' member function. */
2281 new_sublist
->fn_field
.is_const
= 0;
2282 new_sublist
->fn_field
.is_volatile
= 1;
2285 case 'D': /* `const volatile' member function. */
2286 new_sublist
->fn_field
.is_const
= 1;
2287 new_sublist
->fn_field
.is_volatile
= 1;
2290 case '*': /* File compiled with g++ version 1 -- no info */
2295 complaint (&symfile_complaints
,
2296 _("const/volatile indicator missing, got '%c'"), **pp
);
2305 /* virtual member function, followed by index.
2306 The sign bit is set to distinguish pointers-to-methods
2307 from virtual function indicies. Since the array is
2308 in words, the quantity must be shifted left by 1
2309 on 16 bit machine, and by 2 on 32 bit machine, forcing
2310 the sign bit out, and usable as a valid index into
2311 the array. Remove the sign bit here. */
2312 new_sublist
->fn_field
.voffset
=
2313 (0x7fffffff & read_huge_number (pp
, ';', &nbits
, 0)) + 2;
2317 STABS_CONTINUE (pp
, objfile
);
2318 if (**pp
== ';' || **pp
== '\0')
2320 /* Must be g++ version 1. */
2321 new_sublist
->fn_field
.fcontext
= 0;
2325 /* Figure out from whence this virtual function came.
2326 It may belong to virtual function table of
2327 one of its baseclasses. */
2328 look_ahead_type
= read_type (pp
, objfile
);
2331 /* g++ version 1 overloaded methods. */
2335 new_sublist
->fn_field
.fcontext
= look_ahead_type
;
2344 look_ahead_type
= NULL
;
2350 /* static member function. */
2352 int slen
= strlen (main_fn_name
);
2354 new_sublist
->fn_field
.voffset
= VOFFSET_STATIC
;
2356 /* For static member functions, we can't tell if they
2357 are stubbed, as they are put out as functions, and not as
2359 GCC v2 emits the fully mangled name if
2360 dbxout.c:flag_minimal_debug is not set, so we have to
2361 detect a fully mangled physname here and set is_stub
2362 accordingly. Fully mangled physnames in v2 start with
2363 the member function name, followed by two underscores.
2364 GCC v3 currently always emits stubbed member functions,
2365 but with fully mangled physnames, which start with _Z. */
2366 if (!(strncmp (new_sublist
->fn_field
.physname
,
2367 main_fn_name
, slen
) == 0
2368 && new_sublist
->fn_field
.physname
[slen
] == '_'
2369 && new_sublist
->fn_field
.physname
[slen
+ 1] == '_'))
2371 new_sublist
->fn_field
.is_stub
= 1;
2378 complaint (&symfile_complaints
,
2379 _("member function type missing, got '%c'"), (*pp
)[-1]);
2380 /* Fall through into normal member function. */
2383 /* normal member function. */
2384 new_sublist
->fn_field
.voffset
= 0;
2385 new_sublist
->fn_field
.fcontext
= 0;
2389 new_sublist
->next
= sublist
;
2390 sublist
= new_sublist
;
2392 STABS_CONTINUE (pp
, objfile
);
2394 while (**pp
!= ';' && **pp
!= '\0');
2397 STABS_CONTINUE (pp
, objfile
);
2399 /* Skip GCC 3.X member functions which are duplicates of the callable
2400 constructor/destructor. */
2401 if (strcmp (main_fn_name
, "__base_ctor") == 0
2402 || strcmp (main_fn_name
, "__base_dtor") == 0
2403 || strcmp (main_fn_name
, "__deleting_dtor") == 0)
2405 xfree (main_fn_name
);
2410 int has_destructor
= 0, has_other
= 0;
2412 struct next_fnfield
*tmp_sublist
;
2414 /* Various versions of GCC emit various mostly-useless
2415 strings in the name field for special member functions.
2417 For stub methods, we need to defer correcting the name
2418 until we are ready to unstub the method, because the current
2419 name string is used by gdb_mangle_name. The only stub methods
2420 of concern here are GNU v2 operators; other methods have their
2421 names correct (see caveat below).
2423 For non-stub methods, in GNU v3, we have a complete physname.
2424 Therefore we can safely correct the name now. This primarily
2425 affects constructors and destructors, whose name will be
2426 __comp_ctor or __comp_dtor instead of Foo or ~Foo. Cast
2427 operators will also have incorrect names; for instance,
2428 "operator int" will be named "operator i" (i.e. the type is
2431 For non-stub methods in GNU v2, we have no easy way to
2432 know if we have a complete physname or not. For most
2433 methods the result depends on the platform (if CPLUS_MARKER
2434 can be `$' or `.', it will use minimal debug information, or
2435 otherwise the full physname will be included).
2437 Rather than dealing with this, we take a different approach.
2438 For v3 mangled names, we can use the full physname; for v2,
2439 we use cplus_demangle_opname (which is actually v2 specific),
2440 because the only interesting names are all operators - once again
2441 barring the caveat below. Skip this process if any method in the
2442 group is a stub, to prevent our fouling up the workings of
2445 The caveat: GCC 2.95.x (and earlier?) put constructors and
2446 destructors in the same method group. We need to split this
2447 into two groups, because they should have different names.
2448 So for each method group we check whether it contains both
2449 routines whose physname appears to be a destructor (the physnames
2450 for and destructors are always provided, due to quirks in v2
2451 mangling) and routines whose physname does not appear to be a
2452 destructor. If so then we break up the list into two halves.
2453 Even if the constructors and destructors aren't in the same group
2454 the destructor will still lack the leading tilde, so that also
2457 So, to summarize what we expect and handle here:
2459 Given Given Real Real Action
2460 method name physname physname method name
2462 __opi [none] __opi__3Foo operator int opname
2464 Foo _._3Foo _._3Foo ~Foo separate and
2466 operator i _ZN3FoocviEv _ZN3FoocviEv operator int demangle
2467 __comp_ctor _ZN3FooC1ERKS_ _ZN3FooC1ERKS_ Foo demangle
2470 tmp_sublist
= sublist
;
2471 while (tmp_sublist
!= NULL
)
2473 if (tmp_sublist
->fn_field
.is_stub
)
2475 if (tmp_sublist
->fn_field
.physname
[0] == '_'
2476 && tmp_sublist
->fn_field
.physname
[1] == 'Z')
2479 if (is_destructor_name (tmp_sublist
->fn_field
.physname
))
2484 tmp_sublist
= tmp_sublist
->next
;
2487 if (has_destructor
&& has_other
)
2489 struct next_fnfieldlist
*destr_fnlist
;
2490 struct next_fnfield
*last_sublist
;
2492 /* Create a new fn_fieldlist for the destructors. */
2494 destr_fnlist
= (struct next_fnfieldlist
*)
2495 xmalloc (sizeof (struct next_fnfieldlist
));
2496 make_cleanup (xfree
, destr_fnlist
);
2497 memset (destr_fnlist
, 0, sizeof (struct next_fnfieldlist
));
2498 destr_fnlist
->fn_fieldlist
.name
2499 = obconcat (&objfile
->objfile_obstack
, "", "~",
2500 new_fnlist
->fn_fieldlist
.name
);
2502 destr_fnlist
->fn_fieldlist
.fn_fields
= (struct fn_field
*)
2503 obstack_alloc (&objfile
->objfile_obstack
,
2504 sizeof (struct fn_field
) * has_destructor
);
2505 memset (destr_fnlist
->fn_fieldlist
.fn_fields
, 0,
2506 sizeof (struct fn_field
) * has_destructor
);
2507 tmp_sublist
= sublist
;
2508 last_sublist
= NULL
;
2510 while (tmp_sublist
!= NULL
)
2512 if (!is_destructor_name (tmp_sublist
->fn_field
.physname
))
2514 tmp_sublist
= tmp_sublist
->next
;
2518 destr_fnlist
->fn_fieldlist
.fn_fields
[i
++]
2519 = tmp_sublist
->fn_field
;
2521 last_sublist
->next
= tmp_sublist
->next
;
2523 sublist
= tmp_sublist
->next
;
2524 last_sublist
= tmp_sublist
;
2525 tmp_sublist
= tmp_sublist
->next
;
2528 destr_fnlist
->fn_fieldlist
.length
= has_destructor
;
2529 destr_fnlist
->next
= fip
->fnlist
;
2530 fip
->fnlist
= destr_fnlist
;
2532 total_length
+= has_destructor
;
2533 length
-= has_destructor
;
2537 /* v3 mangling prevents the use of abbreviated physnames,
2538 so we can do this here. There are stubbed methods in v3
2540 - in -gstabs instead of -gstabs+
2541 - or for static methods, which are output as a function type
2542 instead of a method type. */
2544 update_method_name_from_physname (&new_fnlist
->fn_fieldlist
.name
,
2545 sublist
->fn_field
.physname
);
2547 else if (has_destructor
&& new_fnlist
->fn_fieldlist
.name
[0] != '~')
2549 new_fnlist
->fn_fieldlist
.name
=
2550 concat ("~", main_fn_name
, (char *)NULL
);
2551 xfree (main_fn_name
);
2555 char dem_opname
[256];
2557 ret
= cplus_demangle_opname (new_fnlist
->fn_fieldlist
.name
,
2558 dem_opname
, DMGL_ANSI
);
2560 ret
= cplus_demangle_opname (new_fnlist
->fn_fieldlist
.name
,
2563 new_fnlist
->fn_fieldlist
.name
2564 = obsavestring (dem_opname
, strlen (dem_opname
),
2565 &objfile
->objfile_obstack
);
2568 new_fnlist
->fn_fieldlist
.fn_fields
= (struct fn_field
*)
2569 obstack_alloc (&objfile
->objfile_obstack
,
2570 sizeof (struct fn_field
) * length
);
2571 memset (new_fnlist
->fn_fieldlist
.fn_fields
, 0,
2572 sizeof (struct fn_field
) * length
);
2573 for (i
= length
; (i
--, sublist
); sublist
= sublist
->next
)
2575 new_fnlist
->fn_fieldlist
.fn_fields
[i
] = sublist
->fn_field
;
2578 new_fnlist
->fn_fieldlist
.length
= length
;
2579 new_fnlist
->next
= fip
->fnlist
;
2580 fip
->fnlist
= new_fnlist
;
2582 total_length
+= length
;
2588 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
2589 TYPE_FN_FIELDLISTS (type
) = (struct fn_fieldlist
*)
2590 TYPE_ALLOC (type
, sizeof (struct fn_fieldlist
) * nfn_fields
);
2591 memset (TYPE_FN_FIELDLISTS (type
), 0,
2592 sizeof (struct fn_fieldlist
) * nfn_fields
);
2593 TYPE_NFN_FIELDS (type
) = nfn_fields
;
2594 TYPE_NFN_FIELDS_TOTAL (type
) = total_length
;
2600 /* Special GNU C++ name.
2602 Returns 1 for success, 0 for failure. "failure" means that we can't
2603 keep parsing and it's time for error_type(). */
2606 read_cpp_abbrev (struct field_info
*fip
, char **pp
, struct type
*type
,
2607 struct objfile
*objfile
)
2612 struct type
*context
;
2622 /* At this point, *pp points to something like "22:23=*22...",
2623 where the type number before the ':' is the "context" and
2624 everything after is a regular type definition. Lookup the
2625 type, find it's name, and construct the field name. */
2627 context
= read_type (pp
, objfile
);
2631 case 'f': /* $vf -- a virtual function table pointer */
2632 name
= type_name_no_tag (context
);
2637 fip
->list
->field
.name
=
2638 obconcat (&objfile
->objfile_obstack
, vptr_name
, name
, "");
2641 case 'b': /* $vb -- a virtual bsomethingorother */
2642 name
= type_name_no_tag (context
);
2645 complaint (&symfile_complaints
,
2646 _("C++ abbreviated type name unknown at symtab pos %d"),
2650 fip
->list
->field
.name
=
2651 obconcat (&objfile
->objfile_obstack
, vb_name
, name
, "");
2655 invalid_cpp_abbrev_complaint (*pp
);
2656 fip
->list
->field
.name
=
2657 obconcat (&objfile
->objfile_obstack
,
2658 "INVALID_CPLUSPLUS_ABBREV", "", "");
2662 /* At this point, *pp points to the ':'. Skip it and read the
2668 invalid_cpp_abbrev_complaint (*pp
);
2671 fip
->list
->field
.type
= read_type (pp
, objfile
);
2673 (*pp
)++; /* Skip the comma. */
2679 FIELD_BITPOS (fip
->list
->field
) = read_huge_number (pp
, ';', &nbits
,
2684 /* This field is unpacked. */
2685 FIELD_BITSIZE (fip
->list
->field
) = 0;
2686 fip
->list
->visibility
= VISIBILITY_PRIVATE
;
2690 invalid_cpp_abbrev_complaint (*pp
);
2691 /* We have no idea what syntax an unrecognized abbrev would have, so
2692 better return 0. If we returned 1, we would need to at least advance
2693 *pp to avoid an infinite loop. */
2700 read_one_struct_field (struct field_info
*fip
, char **pp
, char *p
,
2701 struct type
*type
, struct objfile
*objfile
)
2703 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
2705 fip
->list
->field
.name
=
2706 obsavestring (*pp
, p
- *pp
, &objfile
->objfile_obstack
);
2709 /* This means we have a visibility for a field coming. */
2713 fip
->list
->visibility
= *(*pp
)++;
2717 /* normal dbx-style format, no explicit visibility */
2718 fip
->list
->visibility
= VISIBILITY_PUBLIC
;
2721 fip
->list
->field
.type
= read_type (pp
, objfile
);
2726 /* Possible future hook for nested types. */
2729 fip
->list
->field
.bitpos
= (long) -2; /* nested type */
2739 /* Static class member. */
2740 SET_FIELD_PHYSNAME (fip
->list
->field
, savestring (*pp
, p
- *pp
));
2744 else if (**pp
!= ',')
2746 /* Bad structure-type format. */
2747 stabs_general_complaint ("bad structure-type format");
2751 (*pp
)++; /* Skip the comma. */
2755 FIELD_BITPOS (fip
->list
->field
) = read_huge_number (pp
, ',', &nbits
, 0);
2758 stabs_general_complaint ("bad structure-type format");
2761 FIELD_BITSIZE (fip
->list
->field
) = read_huge_number (pp
, ';', &nbits
, 0);
2764 stabs_general_complaint ("bad structure-type format");
2769 if (FIELD_BITPOS (fip
->list
->field
) == 0
2770 && FIELD_BITSIZE (fip
->list
->field
) == 0)
2772 /* This can happen in two cases: (1) at least for gcc 2.4.5 or so,
2773 it is a field which has been optimized out. The correct stab for
2774 this case is to use VISIBILITY_IGNORE, but that is a recent
2775 invention. (2) It is a 0-size array. For example
2776 union { int num; char str[0]; } foo. Printing _("<no value>" for
2777 str in "p foo" is OK, since foo.str (and thus foo.str[3])
2778 will continue to work, and a 0-size array as a whole doesn't
2779 have any contents to print.
2781 I suspect this probably could also happen with gcc -gstabs (not
2782 -gstabs+) for static fields, and perhaps other C++ extensions.
2783 Hopefully few people use -gstabs with gdb, since it is intended
2784 for dbx compatibility. */
2786 /* Ignore this field. */
2787 fip
->list
->visibility
= VISIBILITY_IGNORE
;
2791 /* Detect an unpacked field and mark it as such.
2792 dbx gives a bit size for all fields.
2793 Note that forward refs cannot be packed,
2794 and treat enums as if they had the width of ints. */
2796 struct type
*field_type
= check_typedef (FIELD_TYPE (fip
->list
->field
));
2798 if (TYPE_CODE (field_type
) != TYPE_CODE_INT
2799 && TYPE_CODE (field_type
) != TYPE_CODE_RANGE
2800 && TYPE_CODE (field_type
) != TYPE_CODE_BOOL
2801 && TYPE_CODE (field_type
) != TYPE_CODE_ENUM
)
2803 FIELD_BITSIZE (fip
->list
->field
) = 0;
2805 if ((FIELD_BITSIZE (fip
->list
->field
)
2806 == TARGET_CHAR_BIT
* TYPE_LENGTH (field_type
)
2807 || (TYPE_CODE (field_type
) == TYPE_CODE_ENUM
2808 && FIELD_BITSIZE (fip
->list
->field
)
2809 == gdbarch_int_bit (gdbarch
))
2812 FIELD_BITPOS (fip
->list
->field
) % 8 == 0)
2814 FIELD_BITSIZE (fip
->list
->field
) = 0;
2820 /* Read struct or class data fields. They have the form:
2822 NAME : [VISIBILITY] TYPENUM , BITPOS , BITSIZE ;
2824 At the end, we see a semicolon instead of a field.
2826 In C++, this may wind up being NAME:?TYPENUM:PHYSNAME; for
2829 The optional VISIBILITY is one of:
2831 '/0' (VISIBILITY_PRIVATE)
2832 '/1' (VISIBILITY_PROTECTED)
2833 '/2' (VISIBILITY_PUBLIC)
2834 '/9' (VISIBILITY_IGNORE)
2836 or nothing, for C style fields with public visibility.
2838 Returns 1 for success, 0 for failure. */
2841 read_struct_fields (struct field_info
*fip
, char **pp
, struct type
*type
,
2842 struct objfile
*objfile
)
2845 struct nextfield
*new;
2847 /* We better set p right now, in case there are no fields at all... */
2851 /* Read each data member type until we find the terminating ';' at the end of
2852 the data member list, or break for some other reason such as finding the
2853 start of the member function list. */
2854 /* Stab string for structure/union does not end with two ';' in
2855 SUN C compiler 5.3 i.e. F6U2, hence check for end of string. */
2857 while (**pp
!= ';' && **pp
!= '\0')
2859 STABS_CONTINUE (pp
, objfile
);
2860 /* Get space to record the next field's data. */
2861 new = (struct nextfield
*) xmalloc (sizeof (struct nextfield
));
2862 make_cleanup (xfree
, new);
2863 memset (new, 0, sizeof (struct nextfield
));
2864 new->next
= fip
->list
;
2867 /* Get the field name. */
2870 /* If is starts with CPLUS_MARKER it is a special abbreviation,
2871 unless the CPLUS_MARKER is followed by an underscore, in
2872 which case it is just the name of an anonymous type, which we
2873 should handle like any other type name. */
2875 if (is_cplus_marker (p
[0]) && p
[1] != '_')
2877 if (!read_cpp_abbrev (fip
, pp
, type
, objfile
))
2882 /* Look for the ':' that separates the field name from the field
2883 values. Data members are delimited by a single ':', while member
2884 functions are delimited by a pair of ':'s. When we hit the member
2885 functions (if any), terminate scan loop and return. */
2887 while (*p
!= ':' && *p
!= '\0')
2894 /* Check to see if we have hit the member functions yet. */
2899 read_one_struct_field (fip
, pp
, p
, type
, objfile
);
2901 if (p
[0] == ':' && p
[1] == ':')
2903 /* (the deleted) chill the list of fields: the last entry (at
2904 the head) is a partially constructed entry which we now
2906 fip
->list
= fip
->list
->next
;
2911 /* The stabs for C++ derived classes contain baseclass information which
2912 is marked by a '!' character after the total size. This function is
2913 called when we encounter the baseclass marker, and slurps up all the
2914 baseclass information.
2916 Immediately following the '!' marker is the number of base classes that
2917 the class is derived from, followed by information for each base class.
2918 For each base class, there are two visibility specifiers, a bit offset
2919 to the base class information within the derived class, a reference to
2920 the type for the base class, and a terminating semicolon.
2922 A typical example, with two base classes, would be "!2,020,19;0264,21;".
2924 Baseclass information marker __________________|| | | | | | |
2925 Number of baseclasses __________________________| | | | | | |
2926 Visibility specifiers (2) ________________________| | | | | |
2927 Offset in bits from start of class _________________| | | | |
2928 Type number for base class ___________________________| | | |
2929 Visibility specifiers (2) _______________________________| | |
2930 Offset in bits from start of class ________________________| |
2931 Type number of base class ____________________________________|
2933 Return 1 for success, 0 for (error-type-inducing) failure. */
2939 read_baseclasses (struct field_info
*fip
, char **pp
, struct type
*type
,
2940 struct objfile
*objfile
)
2943 struct nextfield
*new;
2951 /* Skip the '!' baseclass information marker. */
2955 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
2958 TYPE_N_BASECLASSES (type
) = read_huge_number (pp
, ',', &nbits
, 0);
2964 /* Some stupid compilers have trouble with the following, so break
2965 it up into simpler expressions. */
2966 TYPE_FIELD_VIRTUAL_BITS (type
) = (B_TYPE
*)
2967 TYPE_ALLOC (type
, B_BYTES (TYPE_N_BASECLASSES (type
)));
2970 int num_bytes
= B_BYTES (TYPE_N_BASECLASSES (type
));
2973 pointer
= (char *) TYPE_ALLOC (type
, num_bytes
);
2974 TYPE_FIELD_VIRTUAL_BITS (type
) = (B_TYPE
*) pointer
;
2978 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type
), TYPE_N_BASECLASSES (type
));
2980 for (i
= 0; i
< TYPE_N_BASECLASSES (type
); i
++)
2982 new = (struct nextfield
*) xmalloc (sizeof (struct nextfield
));
2983 make_cleanup (xfree
, new);
2984 memset (new, 0, sizeof (struct nextfield
));
2985 new->next
= fip
->list
;
2987 FIELD_BITSIZE (new->field
) = 0; /* this should be an unpacked field! */
2989 STABS_CONTINUE (pp
, objfile
);
2993 /* Nothing to do. */
2996 SET_TYPE_FIELD_VIRTUAL (type
, i
);
2999 /* Unknown character. Complain and treat it as non-virtual. */
3001 complaint (&symfile_complaints
,
3002 _("Unknown virtual character `%c' for baseclass"), **pp
);
3007 new->visibility
= *(*pp
)++;
3008 switch (new->visibility
)
3010 case VISIBILITY_PRIVATE
:
3011 case VISIBILITY_PROTECTED
:
3012 case VISIBILITY_PUBLIC
:
3015 /* Bad visibility format. Complain and treat it as
3018 complaint (&symfile_complaints
,
3019 _("Unknown visibility `%c' for baseclass"),
3021 new->visibility
= VISIBILITY_PUBLIC
;
3028 /* The remaining value is the bit offset of the portion of the object
3029 corresponding to this baseclass. Always zero in the absence of
3030 multiple inheritance. */
3032 FIELD_BITPOS (new->field
) = read_huge_number (pp
, ',', &nbits
, 0);
3037 /* The last piece of baseclass information is the type of the
3038 base class. Read it, and remember it's type name as this
3041 new->field
.type
= read_type (pp
, objfile
);
3042 new->field
.name
= type_name_no_tag (new->field
.type
);
3044 /* skip trailing ';' and bump count of number of fields seen */
3053 /* The tail end of stabs for C++ classes that contain a virtual function
3054 pointer contains a tilde, a %, and a type number.
3055 The type number refers to the base class (possibly this class itself) which
3056 contains the vtable pointer for the current class.
3058 This function is called when we have parsed all the method declarations,
3059 so we can look for the vptr base class info. */
3062 read_tilde_fields (struct field_info
*fip
, char **pp
, struct type
*type
,
3063 struct objfile
*objfile
)
3067 STABS_CONTINUE (pp
, objfile
);
3069 /* If we are positioned at a ';', then skip it. */
3079 if (**pp
== '=' || **pp
== '+' || **pp
== '-')
3081 /* Obsolete flags that used to indicate the presence
3082 of constructors and/or destructors. */
3086 /* Read either a '%' or the final ';'. */
3087 if (*(*pp
)++ == '%')
3089 /* The next number is the type number of the base class
3090 (possibly our own class) which supplies the vtable for
3091 this class. Parse it out, and search that class to find
3092 its vtable pointer, and install those into TYPE_VPTR_BASETYPE
3093 and TYPE_VPTR_FIELDNO. */
3098 t
= read_type (pp
, objfile
);
3100 while (*p
!= '\0' && *p
!= ';')
3106 /* Premature end of symbol. */
3110 TYPE_VPTR_BASETYPE (type
) = t
;
3111 if (type
== t
) /* Our own class provides vtbl ptr */
3113 for (i
= TYPE_NFIELDS (t
) - 1;
3114 i
>= TYPE_N_BASECLASSES (t
);
3117 char *name
= TYPE_FIELD_NAME (t
, i
);
3118 if (!strncmp (name
, vptr_name
, sizeof (vptr_name
) - 2)
3119 && is_cplus_marker (name
[sizeof (vptr_name
) - 2]))
3121 TYPE_VPTR_FIELDNO (type
) = i
;
3125 /* Virtual function table field not found. */
3126 complaint (&symfile_complaints
,
3127 _("virtual function table pointer not found when defining class `%s'"),
3133 TYPE_VPTR_FIELDNO (type
) = TYPE_VPTR_FIELDNO (t
);
3144 attach_fn_fields_to_type (struct field_info
*fip
, struct type
*type
)
3148 for (n
= TYPE_NFN_FIELDS (type
);
3149 fip
->fnlist
!= NULL
;
3150 fip
->fnlist
= fip
->fnlist
->next
)
3152 --n
; /* Circumvent Sun3 compiler bug */
3153 TYPE_FN_FIELDLISTS (type
)[n
] = fip
->fnlist
->fn_fieldlist
;
3158 /* Create the vector of fields, and record how big it is.
3159 We need this info to record proper virtual function table information
3160 for this class's virtual functions. */
3163 attach_fields_to_type (struct field_info
*fip
, struct type
*type
,
3164 struct objfile
*objfile
)
3167 int non_public_fields
= 0;
3168 struct nextfield
*scan
;
3170 /* Count up the number of fields that we have, as well as taking note of
3171 whether or not there are any non-public fields, which requires us to
3172 allocate and build the private_field_bits and protected_field_bits
3175 for (scan
= fip
->list
; scan
!= NULL
; scan
= scan
->next
)
3178 if (scan
->visibility
!= VISIBILITY_PUBLIC
)
3180 non_public_fields
++;
3184 /* Now we know how many fields there are, and whether or not there are any
3185 non-public fields. Record the field count, allocate space for the
3186 array of fields, and create blank visibility bitfields if necessary. */
3188 TYPE_NFIELDS (type
) = nfields
;
3189 TYPE_FIELDS (type
) = (struct field
*)
3190 TYPE_ALLOC (type
, sizeof (struct field
) * nfields
);
3191 memset (TYPE_FIELDS (type
), 0, sizeof (struct field
) * nfields
);
3193 if (non_public_fields
)
3195 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
3197 TYPE_FIELD_PRIVATE_BITS (type
) =
3198 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
3199 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type
), nfields
);
3201 TYPE_FIELD_PROTECTED_BITS (type
) =
3202 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
3203 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type
), nfields
);
3205 TYPE_FIELD_IGNORE_BITS (type
) =
3206 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
3207 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type
), nfields
);
3210 /* Copy the saved-up fields into the field vector. Start from the head
3211 of the list, adding to the tail of the field array, so that they end
3212 up in the same order in the array in which they were added to the list. */
3214 while (nfields
-- > 0)
3216 TYPE_FIELD (type
, nfields
) = fip
->list
->field
;
3217 switch (fip
->list
->visibility
)
3219 case VISIBILITY_PRIVATE
:
3220 SET_TYPE_FIELD_PRIVATE (type
, nfields
);
3223 case VISIBILITY_PROTECTED
:
3224 SET_TYPE_FIELD_PROTECTED (type
, nfields
);
3227 case VISIBILITY_IGNORE
:
3228 SET_TYPE_FIELD_IGNORE (type
, nfields
);
3231 case VISIBILITY_PUBLIC
:
3235 /* Unknown visibility. Complain and treat it as public. */
3237 complaint (&symfile_complaints
, _("Unknown visibility `%c' for field"),
3238 fip
->list
->visibility
);
3242 fip
->list
= fip
->list
->next
;
3248 /* Complain that the compiler has emitted more than one definition for the
3249 structure type TYPE. */
3251 complain_about_struct_wipeout (struct type
*type
)
3256 if (TYPE_TAG_NAME (type
))
3258 name
= TYPE_TAG_NAME (type
);
3259 switch (TYPE_CODE (type
))
3261 case TYPE_CODE_STRUCT
: kind
= "struct "; break;
3262 case TYPE_CODE_UNION
: kind
= "union "; break;
3263 case TYPE_CODE_ENUM
: kind
= "enum "; break;
3267 else if (TYPE_NAME (type
))
3269 name
= TYPE_NAME (type
);
3278 complaint (&symfile_complaints
,
3279 _("struct/union type gets multiply defined: %s%s"), kind
, name
);
3283 /* Read the description of a structure (or union type) and return an object
3284 describing the type.
3286 PP points to a character pointer that points to the next unconsumed token
3287 in the the stabs string. For example, given stabs "A:T4=s4a:1,0,32;;",
3288 *PP will point to "4a:1,0,32;;".
3290 TYPE points to an incomplete type that needs to be filled in.
3292 OBJFILE points to the current objfile from which the stabs information is
3293 being read. (Note that it is redundant in that TYPE also contains a pointer
3294 to this same objfile, so it might be a good idea to eliminate it. FIXME).
3297 static struct type
*
3298 read_struct_type (char **pp
, struct type
*type
, enum type_code type_code
,
3299 struct objfile
*objfile
)
3301 struct cleanup
*back_to
;
3302 struct field_info fi
;
3307 /* When describing struct/union/class types in stabs, G++ always drops
3308 all qualifications from the name. So if you've got:
3309 struct A { ... struct B { ... }; ... };
3310 then G++ will emit stabs for `struct A::B' that call it simply
3311 `struct B'. Obviously, if you've got a real top-level definition for
3312 `struct B', or other nested definitions, this is going to cause
3315 Obviously, GDB can't fix this by itself, but it can at least avoid
3316 scribbling on existing structure type objects when new definitions
3318 if (! (TYPE_CODE (type
) == TYPE_CODE_UNDEF
3319 || TYPE_STUB (type
)))
3321 complain_about_struct_wipeout (type
);
3323 /* It's probably best to return the type unchanged. */
3327 back_to
= make_cleanup (null_cleanup
, 0);
3329 INIT_CPLUS_SPECIFIC (type
);
3330 TYPE_CODE (type
) = type_code
;
3331 TYPE_FLAGS (type
) &= ~TYPE_FLAG_STUB
;
3333 /* First comes the total size in bytes. */
3337 TYPE_LENGTH (type
) = read_huge_number (pp
, 0, &nbits
, 0);
3339 return error_type (pp
, objfile
);
3342 /* Now read the baseclasses, if any, read the regular C struct or C++
3343 class member fields, attach the fields to the type, read the C++
3344 member functions, attach them to the type, and then read any tilde
3345 field (baseclass specifier for the class holding the main vtable). */
3347 if (!read_baseclasses (&fi
, pp
, type
, objfile
)
3348 || !read_struct_fields (&fi
, pp
, type
, objfile
)
3349 || !attach_fields_to_type (&fi
, type
, objfile
)
3350 || !read_member_functions (&fi
, pp
, type
, objfile
)
3351 || !attach_fn_fields_to_type (&fi
, type
)
3352 || !read_tilde_fields (&fi
, pp
, type
, objfile
))
3354 type
= error_type (pp
, objfile
);
3357 do_cleanups (back_to
);
3361 /* Read a definition of an array type,
3362 and create and return a suitable type object.
3363 Also creates a range type which represents the bounds of that
3366 static struct type
*
3367 read_array_type (char **pp
, struct type
*type
,
3368 struct objfile
*objfile
)
3370 struct type
*index_type
, *element_type
, *range_type
;
3375 /* Format of an array type:
3376 "ar<index type>;lower;upper;<array_contents_type>".
3377 OS9000: "arlower,upper;<array_contents_type>".
3379 Fortran adjustable arrays use Adigits or Tdigits for lower or upper;
3380 for these, produce a type like float[][]. */
3383 index_type
= read_type (pp
, objfile
);
3385 /* Improper format of array type decl. */
3386 return error_type (pp
, objfile
);
3390 if (!(**pp
>= '0' && **pp
<= '9') && **pp
!= '-')
3395 lower
= read_huge_number (pp
, ';', &nbits
, 0);
3398 return error_type (pp
, objfile
);
3400 if (!(**pp
>= '0' && **pp
<= '9') && **pp
!= '-')
3405 upper
= read_huge_number (pp
, ';', &nbits
, 0);
3407 return error_type (pp
, objfile
);
3409 element_type
= read_type (pp
, objfile
);
3418 create_range_type ((struct type
*) NULL
, index_type
, lower
, upper
);
3419 type
= create_array_type (type
, element_type
, range_type
);
3425 /* Read a definition of an enumeration type,
3426 and create and return a suitable type object.
3427 Also defines the symbols that represent the values of the type. */
3429 static struct type
*
3430 read_enum_type (char **pp
, struct type
*type
,
3431 struct objfile
*objfile
)
3433 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
3439 struct pending
**symlist
;
3440 struct pending
*osyms
, *syms
;
3443 int unsigned_enum
= 1;
3446 /* FIXME! The stabs produced by Sun CC merrily define things that ought
3447 to be file-scope, between N_FN entries, using N_LSYM. What's a mother
3448 to do? For now, force all enum values to file scope. */
3449 if (within_function
)
3450 symlist
= &local_symbols
;
3453 symlist
= &file_symbols
;
3455 o_nsyms
= osyms
? osyms
->nsyms
: 0;
3457 /* The aix4 compiler emits an extra field before the enum members;
3458 my guess is it's a type of some sort. Just ignore it. */
3461 /* Skip over the type. */
3465 /* Skip over the colon. */
3469 /* Read the value-names and their values.
3470 The input syntax is NAME:VALUE,NAME:VALUE, and so on.
3471 A semicolon or comma instead of a NAME means the end. */
3472 while (**pp
&& **pp
!= ';' && **pp
!= ',')
3474 STABS_CONTINUE (pp
, objfile
);
3478 name
= obsavestring (*pp
, p
- *pp
, &objfile
->objfile_obstack
);
3480 n
= read_huge_number (pp
, ',', &nbits
, 0);
3482 return error_type (pp
, objfile
);
3484 sym
= (struct symbol
*)
3485 obstack_alloc (&objfile
->objfile_obstack
, sizeof (struct symbol
));
3486 memset (sym
, 0, sizeof (struct symbol
));
3487 DEPRECATED_SYMBOL_NAME (sym
) = name
;
3488 SYMBOL_LANGUAGE (sym
) = current_subfile
->language
;
3489 SYMBOL_CLASS (sym
) = LOC_CONST
;
3490 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
3491 SYMBOL_VALUE (sym
) = n
;
3494 add_symbol_to_list (sym
, symlist
);
3499 (*pp
)++; /* Skip the semicolon. */
3501 /* Now fill in the fields of the type-structure. */
3503 TYPE_LENGTH (type
) = gdbarch_int_bit (gdbarch
) / HOST_CHAR_BIT
;
3504 TYPE_CODE (type
) = TYPE_CODE_ENUM
;
3505 TYPE_FLAGS (type
) &= ~TYPE_FLAG_STUB
;
3507 TYPE_FLAGS (type
) |= TYPE_FLAG_UNSIGNED
;
3508 TYPE_NFIELDS (type
) = nsyms
;
3509 TYPE_FIELDS (type
) = (struct field
*)
3510 TYPE_ALLOC (type
, sizeof (struct field
) * nsyms
);
3511 memset (TYPE_FIELDS (type
), 0, sizeof (struct field
) * nsyms
);
3513 /* Find the symbols for the values and put them into the type.
3514 The symbols can be found in the symlist that we put them on
3515 to cause them to be defined. osyms contains the old value
3516 of that symlist; everything up to there was defined by us. */
3517 /* Note that we preserve the order of the enum constants, so
3518 that in something like "enum {FOO, LAST_THING=FOO}" we print
3519 FOO, not LAST_THING. */
3521 for (syms
= *symlist
, n
= nsyms
- 1; syms
; syms
= syms
->next
)
3523 int last
= syms
== osyms
? o_nsyms
: 0;
3524 int j
= syms
->nsyms
;
3525 for (; --j
>= last
; --n
)
3527 struct symbol
*xsym
= syms
->symbol
[j
];
3528 SYMBOL_TYPE (xsym
) = type
;
3529 TYPE_FIELD_NAME (type
, n
) = DEPRECATED_SYMBOL_NAME (xsym
);
3530 TYPE_FIELD_BITPOS (type
, n
) = SYMBOL_VALUE (xsym
);
3531 TYPE_FIELD_BITSIZE (type
, n
) = 0;
3540 /* Sun's ACC uses a somewhat saner method for specifying the builtin
3541 typedefs in every file (for int, long, etc):
3543 type = b <signed> <width> <format type>; <offset>; <nbits>
3545 optional format type = c or b for char or boolean.
3546 offset = offset from high order bit to start bit of type.
3547 width is # bytes in object of this type, nbits is # bits in type.
3549 The width/offset stuff appears to be for small objects stored in
3550 larger ones (e.g. `shorts' in `int' registers). We ignore it for now,
3553 static struct type
*
3554 read_sun_builtin_type (char **pp
, int typenums
[2], struct objfile
*objfile
)
3559 enum type_code code
= TYPE_CODE_INT
;
3570 return error_type (pp
, objfile
);
3574 /* For some odd reason, all forms of char put a c here. This is strange
3575 because no other type has this honor. We can safely ignore this because
3576 we actually determine 'char'acterness by the number of bits specified in
3578 Boolean forms, e.g Fortran logical*X, put a b here. */
3582 else if (**pp
== 'b')
3584 code
= TYPE_CODE_BOOL
;
3588 /* The first number appears to be the number of bytes occupied
3589 by this type, except that unsigned short is 4 instead of 2.
3590 Since this information is redundant with the third number,
3591 we will ignore it. */
3592 read_huge_number (pp
, ';', &nbits
, 0);
3594 return error_type (pp
, objfile
);
3596 /* The second number is always 0, so ignore it too. */
3597 read_huge_number (pp
, ';', &nbits
, 0);
3599 return error_type (pp
, objfile
);
3601 /* The third number is the number of bits for this type. */
3602 type_bits
= read_huge_number (pp
, 0, &nbits
, 0);
3604 return error_type (pp
, objfile
);
3605 /* The type *should* end with a semicolon. If it are embedded
3606 in a larger type the semicolon may be the only way to know where
3607 the type ends. If this type is at the end of the stabstring we
3608 can deal with the omitted semicolon (but we don't have to like
3609 it). Don't bother to complain(), Sun's compiler omits the semicolon
3615 return init_type (TYPE_CODE_VOID
, 1,
3616 signed_type
? 0 : TYPE_FLAG_UNSIGNED
, (char *) NULL
,
3619 return init_type (code
,
3620 type_bits
/ TARGET_CHAR_BIT
,
3621 signed_type
? 0 : TYPE_FLAG_UNSIGNED
, (char *) NULL
,
3625 static struct type
*
3626 read_sun_floating_type (char **pp
, int typenums
[2], struct objfile
*objfile
)
3631 struct type
*rettype
;
3633 /* The first number has more details about the type, for example
3635 details
= read_huge_number (pp
, ';', &nbits
, 0);
3637 return error_type (pp
, objfile
);
3639 /* The second number is the number of bytes occupied by this type */
3640 nbytes
= read_huge_number (pp
, ';', &nbits
, 0);
3642 return error_type (pp
, objfile
);
3644 if (details
== NF_COMPLEX
|| details
== NF_COMPLEX16
3645 || details
== NF_COMPLEX32
)
3647 rettype
= init_type (TYPE_CODE_COMPLEX
, nbytes
, 0, NULL
, objfile
);
3648 TYPE_TARGET_TYPE (rettype
)
3649 = init_type (TYPE_CODE_FLT
, nbytes
/ 2, 0, NULL
, objfile
);
3653 return init_type (TYPE_CODE_FLT
, nbytes
, 0, NULL
, objfile
);
3656 /* Read a number from the string pointed to by *PP.
3657 The value of *PP is advanced over the number.
3658 If END is nonzero, the character that ends the
3659 number must match END, or an error happens;
3660 and that character is skipped if it does match.
3661 If END is zero, *PP is left pointing to that character.
3663 If TWOS_COMPLEMENT_BITS is set to a strictly positive value and if
3664 the number is represented in an octal representation, assume that
3665 it is represented in a 2's complement representation with a size of
3666 TWOS_COMPLEMENT_BITS.
3668 If the number fits in a long, set *BITS to 0 and return the value.
3669 If not, set *BITS to be the number of bits in the number and return 0.
3671 If encounter garbage, set *BITS to -1 and return 0. */
3674 read_huge_number (char **pp
, int end
, int *bits
, int twos_complement_bits
)
3685 int twos_complement_representation
= 0;
3693 /* Leading zero means octal. GCC uses this to output values larger
3694 than an int (because that would be hard in decimal). */
3701 /* Skip extra zeros. */
3705 if (sign
> 0 && radix
== 8 && twos_complement_bits
> 0)
3707 /* Octal, possibly signed. Check if we have enough chars for a
3712 while ((c
= *p1
) >= '0' && c
< '8')
3716 if (len
> twos_complement_bits
/ 3
3717 || (twos_complement_bits
% 3 == 0 && len
== twos_complement_bits
/ 3))
3719 /* Ok, we have enough characters for a signed value, check
3720 for signness by testing if the sign bit is set. */
3721 sign_bit
= (twos_complement_bits
% 3 + 2) % 3;
3723 if (c
& (1 << sign_bit
))
3725 /* Definitely signed. */
3726 twos_complement_representation
= 1;
3732 upper_limit
= LONG_MAX
/ radix
;
3734 while ((c
= *p
++) >= '0' && c
< ('0' + radix
))
3736 if (n
<= upper_limit
)
3738 if (twos_complement_representation
)
3740 /* Octal, signed, twos complement representation. In
3741 this case, n is the corresponding absolute value. */
3744 long sn
= c
- '0' - ((2 * (c
- '0')) | (2 << sign_bit
));
3755 /* unsigned representation */
3757 n
+= c
- '0'; /* FIXME this overflows anyway */
3763 /* This depends on large values being output in octal, which is
3770 /* Ignore leading zeroes. */
3774 else if (c
== '2' || c
== '3')
3795 if (radix
== 8 && twos_complement_bits
> 0 && nbits
> twos_complement_bits
)
3797 /* We were supposed to parse a number with maximum
3798 TWOS_COMPLEMENT_BITS bits, but something went wrong. */
3809 /* Large decimal constants are an error (because it is hard to
3810 count how many bits are in them). */
3816 /* -0x7f is the same as 0x80. So deal with it by adding one to
3817 the number of bits. Two's complement represention octals
3818 can't have a '-' in front. */
3819 if (sign
== -1 && !twos_complement_representation
)
3830 /* It's *BITS which has the interesting information. */
3834 static struct type
*
3835 read_range_type (char **pp
, int typenums
[2], int type_size
,
3836 struct objfile
*objfile
)
3838 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
3839 char *orig_pp
= *pp
;
3844 struct type
*result_type
;
3845 struct type
*index_type
= NULL
;
3847 /* First comes a type we are a subrange of.
3848 In C it is usually 0, 1 or the type being defined. */
3849 if (read_type_number (pp
, rangenums
) != 0)
3850 return error_type (pp
, objfile
);
3851 self_subrange
= (rangenums
[0] == typenums
[0] &&
3852 rangenums
[1] == typenums
[1]);
3857 index_type
= read_type (pp
, objfile
);
3860 /* A semicolon should now follow; skip it. */
3864 /* The remaining two operands are usually lower and upper bounds
3865 of the range. But in some special cases they mean something else. */
3866 n2
= read_huge_number (pp
, ';', &n2bits
, type_size
);
3867 n3
= read_huge_number (pp
, ';', &n3bits
, type_size
);
3869 if (n2bits
== -1 || n3bits
== -1)
3870 return error_type (pp
, objfile
);
3873 goto handle_true_range
;
3875 /* If limits are huge, must be large integral type. */
3876 if (n2bits
!= 0 || n3bits
!= 0)
3878 char got_signed
= 0;
3879 char got_unsigned
= 0;
3880 /* Number of bits in the type. */
3883 /* If a type size attribute has been specified, the bounds of
3884 the range should fit in this size. If the lower bounds needs
3885 more bits than the upper bound, then the type is signed. */
3886 if (n2bits
<= type_size
&& n3bits
<= type_size
)
3888 if (n2bits
== type_size
&& n2bits
> n3bits
)
3894 /* Range from 0 to <large number> is an unsigned large integral type. */
3895 else if ((n2bits
== 0 && n2
== 0) && n3bits
!= 0)
3900 /* Range from <large number> to <large number>-1 is a large signed
3901 integral type. Take care of the case where <large number> doesn't
3902 fit in a long but <large number>-1 does. */
3903 else if ((n2bits
!= 0 && n3bits
!= 0 && n2bits
== n3bits
+ 1)
3904 || (n2bits
!= 0 && n3bits
== 0
3905 && (n2bits
== sizeof (long) * HOST_CHAR_BIT
)
3912 if (got_signed
|| got_unsigned
)
3914 return init_type (TYPE_CODE_INT
, nbits
/ TARGET_CHAR_BIT
,
3915 got_unsigned
? TYPE_FLAG_UNSIGNED
: 0, NULL
,
3919 return error_type (pp
, objfile
);
3922 /* A type defined as a subrange of itself, with bounds both 0, is void. */
3923 if (self_subrange
&& n2
== 0 && n3
== 0)
3924 return init_type (TYPE_CODE_VOID
, 1, 0, NULL
, objfile
);
3926 /* If n3 is zero and n2 is positive, we want a floating type, and n2
3927 is the width in bytes.
3929 Fortran programs appear to use this for complex types also. To
3930 distinguish between floats and complex, g77 (and others?) seem
3931 to use self-subranges for the complexes, and subranges of int for
3934 Also note that for complexes, g77 sets n2 to the size of one of
3935 the member floats, not the whole complex beast. My guess is that
3936 this was to work well with pre-COMPLEX versions of gdb. */
3938 if (n3
== 0 && n2
> 0)
3940 struct type
*float_type
3941 = init_type (TYPE_CODE_FLT
, n2
, 0, NULL
, objfile
);
3945 struct type
*complex_type
=
3946 init_type (TYPE_CODE_COMPLEX
, 2 * n2
, 0, NULL
, objfile
);
3947 TYPE_TARGET_TYPE (complex_type
) = float_type
;
3948 return complex_type
;
3954 /* If the upper bound is -1, it must really be an unsigned integral. */
3956 else if (n2
== 0 && n3
== -1)
3958 int bits
= type_size
;
3961 /* We don't know its size. It is unsigned int or unsigned
3962 long. GCC 2.3.3 uses this for long long too, but that is
3963 just a GDB 3.5 compatibility hack. */
3964 bits
= gdbarch_int_bit (gdbarch
);
3967 return init_type (TYPE_CODE_INT
, bits
/ TARGET_CHAR_BIT
,
3968 TYPE_FLAG_UNSIGNED
, NULL
, objfile
);
3971 /* Special case: char is defined (Who knows why) as a subrange of
3972 itself with range 0-127. */
3973 else if (self_subrange
&& n2
== 0 && n3
== 127)
3974 return init_type (TYPE_CODE_INT
, 1, TYPE_FLAG_NOSIGN
, NULL
, objfile
);
3976 /* We used to do this only for subrange of self or subrange of int. */
3979 /* -1 is used for the upper bound of (4 byte) "unsigned int" and
3980 "unsigned long", and we already checked for that,
3981 so don't need to test for it here. */
3984 /* n3 actually gives the size. */
3985 return init_type (TYPE_CODE_INT
, -n3
, TYPE_FLAG_UNSIGNED
,
3988 /* Is n3 == 2**(8n)-1 for some integer n? Then it's an
3989 unsigned n-byte integer. But do require n to be a power of
3990 two; we don't want 3- and 5-byte integers flying around. */
3996 for (bytes
= 0; (bits
& 0xff) == 0xff; bytes
++)
3999 && ((bytes
- 1) & bytes
) == 0) /* "bytes is a power of two" */
4000 return init_type (TYPE_CODE_INT
, bytes
, TYPE_FLAG_UNSIGNED
, NULL
,
4004 /* I think this is for Convex "long long". Since I don't know whether
4005 Convex sets self_subrange, I also accept that particular size regardless
4006 of self_subrange. */
4007 else if (n3
== 0 && n2
< 0
4009 || n2
== -gdbarch_long_long_bit
4010 (gdbarch
) / TARGET_CHAR_BIT
))
4011 return init_type (TYPE_CODE_INT
, -n2
, 0, NULL
, objfile
);
4012 else if (n2
== -n3
- 1)
4015 return init_type (TYPE_CODE_INT
, 1, 0, NULL
, objfile
);
4017 return init_type (TYPE_CODE_INT
, 2, 0, NULL
, objfile
);
4018 if (n3
== 0x7fffffff)
4019 return init_type (TYPE_CODE_INT
, 4, 0, NULL
, objfile
);
4022 /* We have a real range type on our hands. Allocate space and
4023 return a real pointer. */
4027 index_type
= builtin_type (gdbarch
)->builtin_int
;
4029 index_type
= *dbx_lookup_type (rangenums
);
4030 if (index_type
== NULL
)
4032 /* Does this actually ever happen? Is that why we are worrying
4033 about dealing with it rather than just calling error_type? */
4035 complaint (&symfile_complaints
,
4036 _("base type %d of range type is not defined"), rangenums
[1]);
4038 index_type
= builtin_type (gdbarch
)->builtin_int
;
4041 result_type
= create_range_type ((struct type
*) NULL
, index_type
, n2
, n3
);
4042 return (result_type
);
4045 /* Read in an argument list. This is a list of types, separated by commas
4046 and terminated with END. Return the list of types read in, or NULL
4047 if there is an error. */
4049 static struct field
*
4050 read_args (char **pp
, int end
, struct objfile
*objfile
, int *nargsp
,
4053 /* FIXME! Remove this arbitrary limit! */
4054 struct type
*types
[1024]; /* allow for fns of 1023 parameters */
4061 /* Invalid argument list: no ','. */
4064 STABS_CONTINUE (pp
, objfile
);
4065 types
[n
++] = read_type (pp
, objfile
);
4067 (*pp
)++; /* get past `end' (the ':' character) */
4069 if (TYPE_CODE (types
[n
- 1]) != TYPE_CODE_VOID
)
4077 rval
= (struct field
*) xmalloc (n
* sizeof (struct field
));
4078 memset (rval
, 0, n
* sizeof (struct field
));
4079 for (i
= 0; i
< n
; i
++)
4080 rval
[i
].type
= types
[i
];
4085 /* Common block handling. */
4087 /* List of symbols declared since the last BCOMM. This list is a tail
4088 of local_symbols. When ECOMM is seen, the symbols on the list
4089 are noted so their proper addresses can be filled in later,
4090 using the common block base address gotten from the assembler
4093 static struct pending
*common_block
;
4094 static int common_block_i
;
4096 /* Name of the current common block. We get it from the BCOMM instead of the
4097 ECOMM to match IBM documentation (even though IBM puts the name both places
4098 like everyone else). */
4099 static char *common_block_name
;
4101 /* Process a N_BCOMM symbol. The storage for NAME is not guaranteed
4102 to remain after this function returns. */
4105 common_block_start (char *name
, struct objfile
*objfile
)
4107 if (common_block_name
!= NULL
)
4109 complaint (&symfile_complaints
,
4110 _("Invalid symbol data: common block within common block"));
4112 common_block
= local_symbols
;
4113 common_block_i
= local_symbols
? local_symbols
->nsyms
: 0;
4114 common_block_name
= obsavestring (name
, strlen (name
),
4115 &objfile
->objfile_obstack
);
4118 /* Process a N_ECOMM symbol. */
4121 common_block_end (struct objfile
*objfile
)
4123 /* Symbols declared since the BCOMM are to have the common block
4124 start address added in when we know it. common_block and
4125 common_block_i point to the first symbol after the BCOMM in
4126 the local_symbols list; copy the list and hang it off the
4127 symbol for the common block name for later fixup. */
4130 struct pending
*new = 0;
4131 struct pending
*next
;
4134 if (common_block_name
== NULL
)
4136 complaint (&symfile_complaints
, _("ECOMM symbol unmatched by BCOMM"));
4140 sym
= (struct symbol
*)
4141 obstack_alloc (&objfile
->objfile_obstack
, sizeof (struct symbol
));
4142 memset (sym
, 0, sizeof (struct symbol
));
4143 /* Note: common_block_name already saved on objfile_obstack */
4144 DEPRECATED_SYMBOL_NAME (sym
) = common_block_name
;
4145 SYMBOL_CLASS (sym
) = LOC_BLOCK
;
4147 /* Now we copy all the symbols which have been defined since the BCOMM. */
4149 /* Copy all the struct pendings before common_block. */
4150 for (next
= local_symbols
;
4151 next
!= NULL
&& next
!= common_block
;
4154 for (j
= 0; j
< next
->nsyms
; j
++)
4155 add_symbol_to_list (next
->symbol
[j
], &new);
4158 /* Copy however much of COMMON_BLOCK we need. If COMMON_BLOCK is
4159 NULL, it means copy all the local symbols (which we already did
4162 if (common_block
!= NULL
)
4163 for (j
= common_block_i
; j
< common_block
->nsyms
; j
++)
4164 add_symbol_to_list (common_block
->symbol
[j
], &new);
4166 SYMBOL_TYPE (sym
) = (struct type
*) new;
4168 /* Should we be putting local_symbols back to what it was?
4171 i
= hashname (DEPRECATED_SYMBOL_NAME (sym
));
4172 SYMBOL_VALUE_CHAIN (sym
) = global_sym_chain
[i
];
4173 global_sym_chain
[i
] = sym
;
4174 common_block_name
= NULL
;
4177 /* Add a common block's start address to the offset of each symbol
4178 declared to be in it (by being between a BCOMM/ECOMM pair that uses
4179 the common block name). */
4182 fix_common_block (struct symbol
*sym
, int valu
)
4184 struct pending
*next
= (struct pending
*) SYMBOL_TYPE (sym
);
4185 for (; next
; next
= next
->next
)
4188 for (j
= next
->nsyms
- 1; j
>= 0; j
--)
4189 SYMBOL_VALUE_ADDRESS (next
->symbol
[j
]) += valu
;
4195 /* Add {TYPE, TYPENUMS} to the NONAME_UNDEFS vector.
4196 See add_undefined_type for more details. */
4199 add_undefined_type_noname (struct type
*type
, int typenums
[2])
4203 nat
.typenums
[0] = typenums
[0];
4204 nat
.typenums
[1] = typenums
[1];
4207 if (noname_undefs_length
== noname_undefs_allocated
)
4209 noname_undefs_allocated
*= 2;
4210 noname_undefs
= (struct nat
*)
4211 xrealloc ((char *) noname_undefs
,
4212 noname_undefs_allocated
* sizeof (struct nat
));
4214 noname_undefs
[noname_undefs_length
++] = nat
;
4217 /* Add TYPE to the UNDEF_TYPES vector.
4218 See add_undefined_type for more details. */
4221 add_undefined_type_1 (struct type
*type
)
4223 if (undef_types_length
== undef_types_allocated
)
4225 undef_types_allocated
*= 2;
4226 undef_types
= (struct type
**)
4227 xrealloc ((char *) undef_types
,
4228 undef_types_allocated
* sizeof (struct type
*));
4230 undef_types
[undef_types_length
++] = type
;
4233 /* What about types defined as forward references inside of a small lexical
4235 /* Add a type to the list of undefined types to be checked through
4236 once this file has been read in.
4238 In practice, we actually maintain two such lists: The first list
4239 (UNDEF_TYPES) is used for types whose name has been provided, and
4240 concerns forward references (eg 'xs' or 'xu' forward references);
4241 the second list (NONAME_UNDEFS) is used for types whose name is
4242 unknown at creation time, because they were referenced through
4243 their type number before the actual type was declared.
4244 This function actually adds the given type to the proper list. */
4247 add_undefined_type (struct type
*type
, int typenums
[2])
4249 if (TYPE_TAG_NAME (type
) == NULL
)
4250 add_undefined_type_noname (type
, typenums
);
4252 add_undefined_type_1 (type
);
4255 /* Try to fix all undefined types pushed on the UNDEF_TYPES vector. */
4258 cleanup_undefined_types_noname (void)
4262 for (i
= 0; i
< noname_undefs_length
; i
++)
4264 struct nat nat
= noname_undefs
[i
];
4267 type
= dbx_lookup_type (nat
.typenums
);
4268 if (nat
.type
!= *type
&& TYPE_CODE (*type
) != TYPE_CODE_UNDEF
)
4270 /* The instance flags of the undefined type are still unset,
4271 and needs to be copied over from the reference type.
4272 Since replace_type expects them to be identical, we need
4273 to set these flags manually before hand. */
4274 TYPE_INSTANCE_FLAGS (nat
.type
) = TYPE_INSTANCE_FLAGS (*type
);
4275 replace_type (nat
.type
, *type
);
4279 noname_undefs_length
= 0;
4282 /* Go through each undefined type, see if it's still undefined, and fix it
4283 up if possible. We have two kinds of undefined types:
4285 TYPE_CODE_ARRAY: Array whose target type wasn't defined yet.
4286 Fix: update array length using the element bounds
4287 and the target type's length.
4288 TYPE_CODE_STRUCT, TYPE_CODE_UNION: Structure whose fields were not
4289 yet defined at the time a pointer to it was made.
4290 Fix: Do a full lookup on the struct/union tag. */
4293 cleanup_undefined_types_1 (void)
4297 /* Iterate over every undefined type, and look for a symbol whose type
4298 matches our undefined type. The symbol matches if:
4299 1. It is a typedef in the STRUCT domain;
4300 2. It has the same name, and same type code;
4301 3. The instance flags are identical.
4303 It is important to check the instance flags, because we have seen
4304 examples where the debug info contained definitions such as:
4306 "foo_t:t30=B31=xefoo_t:"
4308 In this case, we have created an undefined type named "foo_t" whose
4309 instance flags is null (when processing "xefoo_t"), and then created
4310 another type with the same name, but with different instance flags
4311 ('B' means volatile). I think that the definition above is wrong,
4312 since the same type cannot be volatile and non-volatile at the same
4313 time, but we need to be able to cope with it when it happens. The
4314 approach taken here is to treat these two types as different. */
4316 for (type
= undef_types
; type
< undef_types
+ undef_types_length
; type
++)
4318 switch (TYPE_CODE (*type
))
4321 case TYPE_CODE_STRUCT
:
4322 case TYPE_CODE_UNION
:
4323 case TYPE_CODE_ENUM
:
4325 /* Check if it has been defined since. Need to do this here
4326 as well as in check_typedef to deal with the (legitimate in
4327 C though not C++) case of several types with the same name
4328 in different source files. */
4329 if (TYPE_STUB (*type
))
4331 struct pending
*ppt
;
4333 /* Name of the type, without "struct" or "union" */
4334 char *typename
= TYPE_TAG_NAME (*type
);
4336 if (typename
== NULL
)
4338 complaint (&symfile_complaints
, _("need a type name"));
4341 for (ppt
= file_symbols
; ppt
; ppt
= ppt
->next
)
4343 for (i
= 0; i
< ppt
->nsyms
; i
++)
4345 struct symbol
*sym
= ppt
->symbol
[i
];
4347 if (SYMBOL_CLASS (sym
) == LOC_TYPEDEF
4348 && SYMBOL_DOMAIN (sym
) == STRUCT_DOMAIN
4349 && (TYPE_CODE (SYMBOL_TYPE (sym
)) ==
4351 && (TYPE_INSTANCE_FLAGS (*type
) ==
4352 TYPE_INSTANCE_FLAGS (SYMBOL_TYPE (sym
)))
4353 && strcmp (DEPRECATED_SYMBOL_NAME (sym
),
4355 replace_type (*type
, SYMBOL_TYPE (sym
));
4364 complaint (&symfile_complaints
,
4365 _("forward-referenced types left unresolved, "
4373 undef_types_length
= 0;
4376 /* Try to fix all the undefined types we ecountered while processing
4380 cleanup_undefined_types (void)
4382 cleanup_undefined_types_1 ();
4383 cleanup_undefined_types_noname ();
4386 /* Scan through all of the global symbols defined in the object file,
4387 assigning values to the debugging symbols that need to be assigned
4388 to. Get these symbols from the minimal symbol table. */
4391 scan_file_globals (struct objfile
*objfile
)
4394 struct minimal_symbol
*msymbol
;
4395 struct symbol
*sym
, *prev
;
4396 struct objfile
*resolve_objfile
;
4398 /* SVR4 based linkers copy referenced global symbols from shared
4399 libraries to the main executable.
4400 If we are scanning the symbols for a shared library, try to resolve
4401 them from the minimal symbols of the main executable first. */
4403 if (symfile_objfile
&& objfile
!= symfile_objfile
)
4404 resolve_objfile
= symfile_objfile
;
4406 resolve_objfile
= objfile
;
4410 /* Avoid expensive loop through all minimal symbols if there are
4411 no unresolved symbols. */
4412 for (hash
= 0; hash
< HASHSIZE
; hash
++)
4414 if (global_sym_chain
[hash
])
4417 if (hash
>= HASHSIZE
)
4420 for (msymbol
= resolve_objfile
->msymbols
;
4421 msymbol
&& DEPRECATED_SYMBOL_NAME (msymbol
) != NULL
;
4426 /* Skip static symbols. */
4427 switch (MSYMBOL_TYPE (msymbol
))
4439 /* Get the hash index and check all the symbols
4440 under that hash index. */
4442 hash
= hashname (DEPRECATED_SYMBOL_NAME (msymbol
));
4444 for (sym
= global_sym_chain
[hash
]; sym
;)
4446 if (DEPRECATED_SYMBOL_NAME (msymbol
)[0] == DEPRECATED_SYMBOL_NAME (sym
)[0] &&
4447 strcmp (DEPRECATED_SYMBOL_NAME (msymbol
) + 1, DEPRECATED_SYMBOL_NAME (sym
) + 1) == 0)
4449 /* Splice this symbol out of the hash chain and
4450 assign the value we have to it. */
4453 SYMBOL_VALUE_CHAIN (prev
) = SYMBOL_VALUE_CHAIN (sym
);
4457 global_sym_chain
[hash
] = SYMBOL_VALUE_CHAIN (sym
);
4460 /* Check to see whether we need to fix up a common block. */
4461 /* Note: this code might be executed several times for
4462 the same symbol if there are multiple references. */
4465 if (SYMBOL_CLASS (sym
) == LOC_BLOCK
)
4467 fix_common_block (sym
,
4468 SYMBOL_VALUE_ADDRESS (msymbol
));
4472 SYMBOL_VALUE_ADDRESS (sym
)
4473 = SYMBOL_VALUE_ADDRESS (msymbol
);
4475 SYMBOL_SECTION (sym
) = SYMBOL_SECTION (msymbol
);
4480 sym
= SYMBOL_VALUE_CHAIN (prev
);
4484 sym
= global_sym_chain
[hash
];
4490 sym
= SYMBOL_VALUE_CHAIN (sym
);
4494 if (resolve_objfile
== objfile
)
4496 resolve_objfile
= objfile
;
4499 /* Change the storage class of any remaining unresolved globals to
4500 LOC_UNRESOLVED and remove them from the chain. */
4501 for (hash
= 0; hash
< HASHSIZE
; hash
++)
4503 sym
= global_sym_chain
[hash
];
4507 sym
= SYMBOL_VALUE_CHAIN (sym
);
4509 /* Change the symbol address from the misleading chain value
4511 SYMBOL_VALUE_ADDRESS (prev
) = 0;
4513 /* Complain about unresolved common block symbols. */
4514 if (SYMBOL_CLASS (prev
) == LOC_STATIC
)
4515 SYMBOL_CLASS (prev
) = LOC_UNRESOLVED
;
4517 complaint (&symfile_complaints
,
4518 _("%s: common block `%s' from global_sym_chain unresolved"),
4519 objfile
->name
, DEPRECATED_SYMBOL_NAME (prev
));
4522 memset (global_sym_chain
, 0, sizeof (global_sym_chain
));
4525 /* Initialize anything that needs initializing when starting to read
4526 a fresh piece of a symbol file, e.g. reading in the stuff corresponding
4530 stabsread_init (void)
4534 /* Initialize anything that needs initializing when a completely new
4535 symbol file is specified (not just adding some symbols from another
4536 file, e.g. a shared library). */
4539 stabsread_new_init (void)
4541 /* Empty the hash table of global syms looking for values. */
4542 memset (global_sym_chain
, 0, sizeof (global_sym_chain
));
4545 /* Initialize anything that needs initializing at the same time as
4546 start_symtab() is called. */
4551 global_stabs
= NULL
; /* AIX COFF */
4552 /* Leave FILENUM of 0 free for builtin types and this file's types. */
4553 n_this_object_header_files
= 1;
4554 type_vector_length
= 0;
4555 type_vector
= (struct type
**) 0;
4557 /* FIXME: If common_block_name is not already NULL, we should complain(). */
4558 common_block_name
= NULL
;
4561 /* Call after end_symtab() */
4568 xfree (type_vector
);
4571 type_vector_length
= 0;
4572 previous_stab_code
= 0;
4576 finish_global_stabs (struct objfile
*objfile
)
4580 patch_block_stabs (global_symbols
, global_stabs
, objfile
);
4581 xfree (global_stabs
);
4582 global_stabs
= NULL
;
4586 /* Find the end of the name, delimited by a ':', but don't match
4587 ObjC symbols which look like -[Foo bar::]:bla. */
4589 find_name_end (char *name
)
4592 if (s
[0] == '-' || *s
== '+')
4594 /* Must be an ObjC method symbol. */
4597 error (_("invalid symbol name \"%s\""), name
);
4599 s
= strchr (s
, ']');
4602 error (_("invalid symbol name \"%s\""), name
);
4604 return strchr (s
, ':');
4608 return strchr (s
, ':');
4612 /* Initializer for this module */
4615 _initialize_stabsread (void)
4617 undef_types_allocated
= 20;
4618 undef_types_length
= 0;
4619 undef_types
= (struct type
**)
4620 xmalloc (undef_types_allocated
* sizeof (struct type
*));
4622 noname_undefs_allocated
= 20;
4623 noname_undefs_length
= 0;
4624 noname_undefs
= (struct nat
*)
4625 xmalloc (noname_undefs_allocated
* sizeof (struct nat
));