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, 2009 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, struct objfile
*);
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], struct objfile
*objfile
)
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
, objfile
);
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 (objfile
))
285 static struct type
*temp_type
;
287 warning (_("GDB internal error: bad real_filenum"));
290 temp_type
= objfile_type (objfile
)->builtin_error
;
294 f
= HEADER_FILES (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
, objfile
);
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 SYMBOL_SET_LINKAGE_NAME
391 (sym
, obsavestring (name
, pp
- name
,
392 &objfile
->objfile_obstack
));
394 if (*(pp
- 1) == 'F' || *(pp
- 1) == 'f')
396 /* I don't think the linker does this with functions,
397 so as far as I know this is never executed.
398 But it doesn't hurt to check. */
400 lookup_function_type (read_type (&pp
, objfile
));
404 SYMBOL_TYPE (sym
) = read_type (&pp
, objfile
);
406 add_symbol_to_list (sym
, &global_symbols
);
411 if (*(pp
- 1) == 'F' || *(pp
- 1) == 'f')
414 lookup_function_type (read_type (&pp
, objfile
));
418 SYMBOL_TYPE (sym
) = read_type (&pp
, objfile
);
426 /* Read a number by which a type is referred to in dbx data,
427 or perhaps read a pair (FILENUM, TYPENUM) in parentheses.
428 Just a single number N is equivalent to (0,N).
429 Return the two numbers by storing them in the vector TYPENUMS.
430 TYPENUMS will then be used as an argument to dbx_lookup_type.
432 Returns 0 for success, -1 for error. */
435 read_type_number (char **pp
, int *typenums
)
441 typenums
[0] = read_huge_number (pp
, ',', &nbits
, 0);
444 typenums
[1] = read_huge_number (pp
, ')', &nbits
, 0);
451 typenums
[1] = read_huge_number (pp
, 0, &nbits
, 0);
459 #define VISIBILITY_PRIVATE '0' /* Stabs character for private field */
460 #define VISIBILITY_PROTECTED '1' /* Stabs character for protected fld */
461 #define VISIBILITY_PUBLIC '2' /* Stabs character for public field */
462 #define VISIBILITY_IGNORE '9' /* Optimized out or zero length */
464 /* Structure for storing pointers to reference definitions for fast lookup
465 during "process_later". */
474 #define MAX_CHUNK_REFS 100
475 #define REF_CHUNK_SIZE (MAX_CHUNK_REFS * sizeof (struct ref_map))
476 #define REF_MAP_SIZE(ref_chunk) ((ref_chunk) * REF_CHUNK_SIZE)
478 static struct ref_map
*ref_map
;
480 /* Ptr to free cell in chunk's linked list. */
481 static int ref_count
= 0;
483 /* Number of chunks malloced. */
484 static int ref_chunk
= 0;
486 /* This file maintains a cache of stabs aliases found in the symbol
487 table. If the symbol table changes, this cache must be cleared
488 or we are left holding onto data in invalid obstacks. */
490 stabsread_clear_cache (void)
496 /* Create array of pointers mapping refids to symbols and stab strings.
497 Add pointers to reference definition symbols and/or their values as we
498 find them, using their reference numbers as our index.
499 These will be used later when we resolve references. */
501 ref_add (int refnum
, struct symbol
*sym
, char *stabs
, CORE_ADDR value
)
505 if (refnum
>= ref_count
)
506 ref_count
= refnum
+ 1;
507 if (ref_count
> ref_chunk
* MAX_CHUNK_REFS
)
509 int new_slots
= ref_count
- ref_chunk
* MAX_CHUNK_REFS
;
510 int new_chunks
= new_slots
/ MAX_CHUNK_REFS
+ 1;
511 ref_map
= (struct ref_map
*)
512 xrealloc (ref_map
, REF_MAP_SIZE (ref_chunk
+ new_chunks
));
513 memset (ref_map
+ ref_chunk
* MAX_CHUNK_REFS
, 0, new_chunks
* REF_CHUNK_SIZE
);
514 ref_chunk
+= new_chunks
;
516 ref_map
[refnum
].stabs
= stabs
;
517 ref_map
[refnum
].sym
= sym
;
518 ref_map
[refnum
].value
= value
;
521 /* Return defined sym for the reference REFNUM. */
523 ref_search (int refnum
)
525 if (refnum
< 0 || refnum
> ref_count
)
527 return ref_map
[refnum
].sym
;
530 /* Parse a reference id in STRING and return the resulting
531 reference number. Move STRING beyond the reference id. */
534 process_reference (char **string
)
542 /* Advance beyond the initial '#'. */
545 /* Read number as reference id. */
546 while (*p
&& isdigit (*p
))
548 refnum
= refnum
* 10 + *p
- '0';
555 /* If STRING defines a reference, store away a pointer to the reference
556 definition for later use. Return the reference number. */
559 symbol_reference_defined (char **string
)
564 refnum
= process_reference (&p
);
566 /* Defining symbols end in '=' */
569 /* Symbol is being defined here. */
575 /* Must be a reference. Either the symbol has already been defined,
576 or this is a forward reference to it. */
583 stab_reg_to_regnum (struct symbol
*sym
, struct gdbarch
*gdbarch
)
585 int regno
= gdbarch_stab_reg_to_regnum (gdbarch
, SYMBOL_VALUE (sym
));
587 if (regno
>= gdbarch_num_regs (gdbarch
)
588 + gdbarch_num_pseudo_regs (gdbarch
))
590 reg_value_complaint (regno
,
591 gdbarch_num_regs (gdbarch
)
592 + gdbarch_num_pseudo_regs (gdbarch
),
593 SYMBOL_PRINT_NAME (sym
));
595 regno
= gdbarch_sp_regnum (gdbarch
); /* Known safe, though useless */
601 static const struct symbol_register_ops stab_register_funcs
= {
606 define_symbol (CORE_ADDR valu
, char *string
, int desc
, int type
,
607 struct objfile
*objfile
)
609 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
611 char *p
= (char *) find_name_end (string
);
615 char *new_name
= NULL
;
617 /* We would like to eliminate nameless symbols, but keep their types.
618 E.g. stab entry ":t10=*2" should produce a type 10, which is a pointer
619 to type 2, but, should not create a symbol to address that type. Since
620 the symbol will be nameless, there is no way any user can refer to it. */
624 /* Ignore syms with empty names. */
628 /* Ignore old-style symbols from cc -go */
638 /* If a nameless stab entry, all we need is the type, not the symbol.
639 e.g. ":t10=*2" or a nameless enum like " :T16=ered:0,green:1,blue:2,;" */
640 nameless
= (p
== string
|| ((string
[0] == ' ') && (string
[1] == ':')));
642 current_symbol
= sym
= (struct symbol
*)
643 obstack_alloc (&objfile
->objfile_obstack
, sizeof (struct symbol
));
644 memset (sym
, 0, sizeof (struct symbol
));
646 switch (type
& N_TYPE
)
649 SYMBOL_SECTION (sym
) = SECT_OFF_TEXT (objfile
);
652 SYMBOL_SECTION (sym
) = SECT_OFF_DATA (objfile
);
655 SYMBOL_SECTION (sym
) = SECT_OFF_BSS (objfile
);
659 if (processing_gcc_compilation
)
661 /* GCC 2.x puts the line number in desc. SunOS apparently puts in the
662 number of bytes occupied by a type or object, which we ignore. */
663 SYMBOL_LINE (sym
) = desc
;
667 SYMBOL_LINE (sym
) = 0; /* unknown */
670 if (is_cplus_marker (string
[0]))
672 /* Special GNU C++ names. */
676 SYMBOL_SET_LINKAGE_NAME
677 (sym
, obsavestring ("this", strlen ("this"),
678 &objfile
->objfile_obstack
));
681 case 'v': /* $vtbl_ptr_type */
685 SYMBOL_SET_LINKAGE_NAME
686 (sym
, obsavestring ("eh_throw", strlen ("eh_throw"),
687 &objfile
->objfile_obstack
));
691 /* This was an anonymous type that was never fixed up. */
695 /* SunPRO (3.0 at least) static variable encoding. */
696 if (gdbarch_static_transform_name_p (gdbarch
))
698 /* ... fall through ... */
701 complaint (&symfile_complaints
, _("Unknown C++ symbol name `%s'"),
703 goto normal
; /* Do *something* with it */
709 SYMBOL_LANGUAGE (sym
) = current_subfile
->language
;
710 if (SYMBOL_LANGUAGE (sym
) == language_cplus
)
712 char *name
= alloca (p
- string
+ 1);
713 memcpy (name
, string
, p
- string
);
714 name
[p
- string
] = '\0';
715 new_name
= cp_canonicalize_string (name
);
716 cp_scan_for_anonymous_namespaces (sym
);
718 if (new_name
!= NULL
)
720 SYMBOL_SET_NAMES (sym
, new_name
, strlen (new_name
), objfile
);
724 SYMBOL_SET_NAMES (sym
, string
, p
- string
, objfile
);
728 /* Determine the type of name being defined. */
730 /* Getting GDB to correctly skip the symbol on an undefined symbol
731 descriptor and not ever dump core is a very dodgy proposition if
732 we do things this way. I say the acorn RISC machine can just
733 fix their compiler. */
734 /* The Acorn RISC machine's compiler can put out locals that don't
735 start with "234=" or "(3,4)=", so assume anything other than the
736 deftypes we know how to handle is a local. */
737 if (!strchr ("cfFGpPrStTvVXCR", *p
))
739 if (isdigit (*p
) || *p
== '(' || *p
== '-')
748 /* c is a special case, not followed by a type-number.
749 SYMBOL:c=iVALUE for an integer constant symbol.
750 SYMBOL:c=rVALUE for a floating constant symbol.
751 SYMBOL:c=eTYPE,INTVALUE for an enum constant symbol.
752 e.g. "b:c=e6,0" for "const b = blob1"
753 (where type 6 is defined by "blobs:t6=eblob1:0,blob2:1,;"). */
756 SYMBOL_CLASS (sym
) = LOC_CONST
;
757 SYMBOL_TYPE (sym
) = error_type (&p
, objfile
);
758 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
759 add_symbol_to_list (sym
, &file_symbols
);
769 struct type
*dbl_type
;
771 /* FIXME-if-picky-about-floating-accuracy: Should be using
772 target arithmetic to get the value. real.c in GCC
773 probably has the necessary code. */
775 dbl_type
= objfile_type (objfile
)->builtin_double
;
777 obstack_alloc (&objfile
->objfile_obstack
,
778 TYPE_LENGTH (dbl_type
));
779 store_typed_floating (dbl_valu
, dbl_type
, d
);
781 SYMBOL_TYPE (sym
) = dbl_type
;
782 SYMBOL_VALUE_BYTES (sym
) = dbl_valu
;
783 SYMBOL_CLASS (sym
) = LOC_CONST_BYTES
;
788 /* Defining integer constants this way is kind of silly,
789 since 'e' constants allows the compiler to give not
790 only the value, but the type as well. C has at least
791 int, long, unsigned int, and long long as constant
792 types; other languages probably should have at least
793 unsigned as well as signed constants. */
795 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->builtin_long
;
796 SYMBOL_VALUE (sym
) = atoi (p
);
797 SYMBOL_CLASS (sym
) = LOC_CONST
;
801 /* SYMBOL:c=eTYPE,INTVALUE for a constant symbol whose value
802 can be represented as integral.
803 e.g. "b:c=e6,0" for "const b = blob1"
804 (where type 6 is defined by "blobs:t6=eblob1:0,blob2:1,;"). */
806 SYMBOL_CLASS (sym
) = LOC_CONST
;
807 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
811 SYMBOL_TYPE (sym
) = error_type (&p
, objfile
);
816 /* If the value is too big to fit in an int (perhaps because
817 it is unsigned), or something like that, we silently get
818 a bogus value. The type and everything else about it is
819 correct. Ideally, we should be using whatever we have
820 available for parsing unsigned and long long values,
822 SYMBOL_VALUE (sym
) = atoi (p
);
827 SYMBOL_CLASS (sym
) = LOC_CONST
;
828 SYMBOL_TYPE (sym
) = error_type (&p
, objfile
);
831 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
832 add_symbol_to_list (sym
, &file_symbols
);
836 /* The name of a caught exception. */
837 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
838 SYMBOL_CLASS (sym
) = LOC_LABEL
;
839 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
840 SYMBOL_VALUE_ADDRESS (sym
) = valu
;
841 add_symbol_to_list (sym
, &local_symbols
);
845 /* A static function definition. */
846 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
847 SYMBOL_CLASS (sym
) = LOC_BLOCK
;
848 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
849 add_symbol_to_list (sym
, &file_symbols
);
850 /* fall into process_function_types. */
852 process_function_types
:
853 /* Function result types are described as the result type in stabs.
854 We need to convert this to the function-returning-type-X type
855 in GDB. E.g. "int" is converted to "function returning int". */
856 if (TYPE_CODE (SYMBOL_TYPE (sym
)) != TYPE_CODE_FUNC
)
857 SYMBOL_TYPE (sym
) = lookup_function_type (SYMBOL_TYPE (sym
));
859 /* All functions in C++ have prototypes. Stabs does not offer an
860 explicit way to identify prototyped or unprototyped functions,
861 but both GCC and Sun CC emit stabs for the "call-as" type rather
862 than the "declared-as" type for unprototyped functions, so
863 we treat all functions as if they were prototyped. This is used
864 primarily for promotion when calling the function from GDB. */
865 TYPE_PROTOTYPED (SYMBOL_TYPE (sym
)) = 1;
867 /* fall into process_prototype_types */
869 process_prototype_types
:
870 /* Sun acc puts declared types of arguments here. */
873 struct type
*ftype
= SYMBOL_TYPE (sym
);
878 /* Obtain a worst case guess for the number of arguments
879 by counting the semicolons. */
886 /* Allocate parameter information fields and fill them in. */
887 TYPE_FIELDS (ftype
) = (struct field
*)
888 TYPE_ALLOC (ftype
, nsemi
* sizeof (struct field
));
893 /* A type number of zero indicates the start of varargs.
894 FIXME: GDB currently ignores vararg functions. */
895 if (p
[0] == '0' && p
[1] == '\0')
897 ptype
= read_type (&p
, objfile
);
899 /* The Sun compilers mark integer arguments, which should
900 be promoted to the width of the calling conventions, with
901 a type which references itself. This type is turned into
902 a TYPE_CODE_VOID type by read_type, and we have to turn
903 it back into builtin_int here.
904 FIXME: Do we need a new builtin_promoted_int_arg ? */
905 if (TYPE_CODE (ptype
) == TYPE_CODE_VOID
)
906 ptype
= objfile_type (objfile
)->builtin_int
;
907 TYPE_FIELD_TYPE (ftype
, nparams
) = ptype
;
908 TYPE_FIELD_ARTIFICIAL (ftype
, nparams
++) = 0;
910 TYPE_NFIELDS (ftype
) = nparams
;
911 TYPE_PROTOTYPED (ftype
) = 1;
916 /* A global function definition. */
917 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
918 SYMBOL_CLASS (sym
) = LOC_BLOCK
;
919 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
920 add_symbol_to_list (sym
, &global_symbols
);
921 goto process_function_types
;
924 /* For a class G (global) symbol, it appears that the
925 value is not correct. It is necessary to search for the
926 corresponding linker definition to find the value.
927 These definitions appear at the end of the namelist. */
928 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
929 SYMBOL_CLASS (sym
) = LOC_STATIC
;
930 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
931 /* Don't add symbol references to global_sym_chain.
932 Symbol references don't have valid names and wont't match up with
933 minimal symbols when the global_sym_chain is relocated.
934 We'll fixup symbol references when we fixup the defining symbol. */
935 if (SYMBOL_LINKAGE_NAME (sym
) && SYMBOL_LINKAGE_NAME (sym
)[0] != '#')
937 i
= hashname (SYMBOL_LINKAGE_NAME (sym
));
938 SYMBOL_VALUE_CHAIN (sym
) = global_sym_chain
[i
];
939 global_sym_chain
[i
] = sym
;
941 add_symbol_to_list (sym
, &global_symbols
);
944 /* This case is faked by a conditional above,
945 when there is no code letter in the dbx data.
946 Dbx data never actually contains 'l'. */
949 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
950 SYMBOL_CLASS (sym
) = LOC_LOCAL
;
951 SYMBOL_VALUE (sym
) = valu
;
952 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
953 add_symbol_to_list (sym
, &local_symbols
);
958 /* pF is a two-letter code that means a function parameter in Fortran.
959 The type-number specifies the type of the return value.
960 Translate it into a pointer-to-function type. */
964 = lookup_pointer_type
965 (lookup_function_type (read_type (&p
, objfile
)));
968 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
970 SYMBOL_CLASS (sym
) = LOC_ARG
;
971 SYMBOL_VALUE (sym
) = valu
;
972 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
973 SYMBOL_IS_ARGUMENT (sym
) = 1;
974 add_symbol_to_list (sym
, &local_symbols
);
976 if (gdbarch_byte_order (gdbarch
) != BFD_ENDIAN_BIG
)
978 /* On little-endian machines, this crud is never necessary,
979 and, if the extra bytes contain garbage, is harmful. */
983 /* If it's gcc-compiled, if it says `short', believe it. */
984 if (processing_gcc_compilation
985 || gdbarch_believe_pcc_promotion (gdbarch
))
988 if (!gdbarch_believe_pcc_promotion (gdbarch
))
990 /* If PCC says a parameter is a short or a char, it is
992 if (TYPE_LENGTH (SYMBOL_TYPE (sym
))
993 < gdbarch_int_bit (gdbarch
) / TARGET_CHAR_BIT
994 && TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_INT
)
997 TYPE_UNSIGNED (SYMBOL_TYPE (sym
))
998 ? objfile_type (objfile
)->builtin_unsigned_int
999 : objfile_type (objfile
)->builtin_int
;
1005 /* acc seems to use P to declare the prototypes of functions that
1006 are referenced by this file. gdb is not prepared to deal
1007 with this extra information. FIXME, it ought to. */
1010 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
1011 goto process_prototype_types
;
1016 /* Parameter which is in a register. */
1017 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
1018 SYMBOL_CLASS (sym
) = LOC_REGISTER
;
1019 SYMBOL_REGISTER_OPS (sym
) = &stab_register_funcs
;
1020 SYMBOL_IS_ARGUMENT (sym
) = 1;
1021 SYMBOL_VALUE (sym
) = valu
;
1022 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1023 add_symbol_to_list (sym
, &local_symbols
);
1027 /* Register variable (either global or local). */
1028 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
1029 SYMBOL_CLASS (sym
) = LOC_REGISTER
;
1030 SYMBOL_REGISTER_OPS (sym
) = &stab_register_funcs
;
1031 SYMBOL_VALUE (sym
) = valu
;
1032 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1033 if (within_function
)
1035 /* Sun cc uses a pair of symbols, one 'p' and one 'r', with
1036 the same name to represent an argument passed in a
1037 register. GCC uses 'P' for the same case. So if we find
1038 such a symbol pair we combine it into one 'P' symbol.
1039 For Sun cc we need to do this regardless of
1040 stabs_argument_has_addr, because the compiler puts out
1041 the 'p' symbol even if it never saves the argument onto
1044 On most machines, we want to preserve both symbols, so
1045 that we can still get information about what is going on
1046 with the stack (VAX for computing args_printed, using
1047 stack slots instead of saved registers in backtraces,
1050 Note that this code illegally combines
1051 main(argc) struct foo argc; { register struct foo argc; }
1052 but this case is considered pathological and causes a warning
1053 from a decent compiler. */
1056 && local_symbols
->nsyms
> 0
1057 && gdbarch_stabs_argument_has_addr (gdbarch
, SYMBOL_TYPE (sym
)))
1059 struct symbol
*prev_sym
;
1060 prev_sym
= local_symbols
->symbol
[local_symbols
->nsyms
- 1];
1061 if ((SYMBOL_CLASS (prev_sym
) == LOC_REF_ARG
1062 || SYMBOL_CLASS (prev_sym
) == LOC_ARG
)
1063 && strcmp (SYMBOL_LINKAGE_NAME (prev_sym
),
1064 SYMBOL_LINKAGE_NAME (sym
)) == 0)
1066 SYMBOL_CLASS (prev_sym
) = LOC_REGISTER
;
1067 SYMBOL_REGISTER_OPS (prev_sym
) = &stab_register_funcs
;
1068 /* Use the type from the LOC_REGISTER; that is the type
1069 that is actually in that register. */
1070 SYMBOL_TYPE (prev_sym
) = SYMBOL_TYPE (sym
);
1071 SYMBOL_VALUE (prev_sym
) = SYMBOL_VALUE (sym
);
1076 add_symbol_to_list (sym
, &local_symbols
);
1079 add_symbol_to_list (sym
, &file_symbols
);
1083 /* Static symbol at top level of file */
1084 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
1085 SYMBOL_CLASS (sym
) = LOC_STATIC
;
1086 SYMBOL_VALUE_ADDRESS (sym
) = valu
;
1087 if (gdbarch_static_transform_name_p (gdbarch
)
1088 && gdbarch_static_transform_name (gdbarch
,
1089 SYMBOL_LINKAGE_NAME (sym
))
1090 != SYMBOL_LINKAGE_NAME (sym
))
1092 struct minimal_symbol
*msym
;
1093 msym
= lookup_minimal_symbol (SYMBOL_LINKAGE_NAME (sym
), NULL
, objfile
);
1096 char *new_name
= gdbarch_static_transform_name
1097 (gdbarch
, SYMBOL_LINKAGE_NAME (sym
));
1098 SYMBOL_SET_LINKAGE_NAME (sym
, new_name
);
1099 SYMBOL_VALUE_ADDRESS (sym
) = SYMBOL_VALUE_ADDRESS (msym
);
1102 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1103 add_symbol_to_list (sym
, &file_symbols
);
1107 /* In Ada, there is no distinction between typedef and non-typedef;
1108 any type declaration implicitly has the equivalent of a typedef,
1109 and thus 't' is in fact equivalent to 'Tt'.
1111 Therefore, for Ada units, we check the character immediately
1112 before the 't', and if we do not find a 'T', then make sure to
1113 create the associated symbol in the STRUCT_DOMAIN ('t' definitions
1114 will be stored in the VAR_DOMAIN). If the symbol was indeed
1115 defined as 'Tt' then the STRUCT_DOMAIN symbol will be created
1116 elsewhere, so we don't need to take care of that.
1118 This is important to do, because of forward references:
1119 The cleanup of undefined types stored in undef_types only uses
1120 STRUCT_DOMAIN symbols to perform the replacement. */
1121 synonym
= (SYMBOL_LANGUAGE (sym
) == language_ada
&& p
[-2] != 'T');
1124 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
1126 /* For a nameless type, we don't want a create a symbol, thus we
1127 did not use `sym'. Return without further processing. */
1131 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
1132 SYMBOL_VALUE (sym
) = valu
;
1133 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1134 /* C++ vagaries: we may have a type which is derived from
1135 a base type which did not have its name defined when the
1136 derived class was output. We fill in the derived class's
1137 base part member's name here in that case. */
1138 if (TYPE_NAME (SYMBOL_TYPE (sym
)) != NULL
)
1139 if ((TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_STRUCT
1140 || TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_UNION
)
1141 && TYPE_N_BASECLASSES (SYMBOL_TYPE (sym
)))
1144 for (j
= TYPE_N_BASECLASSES (SYMBOL_TYPE (sym
)) - 1; j
>= 0; j
--)
1145 if (TYPE_BASECLASS_NAME (SYMBOL_TYPE (sym
), j
) == 0)
1146 TYPE_BASECLASS_NAME (SYMBOL_TYPE (sym
), j
) =
1147 type_name_no_tag (TYPE_BASECLASS (SYMBOL_TYPE (sym
), j
));
1150 if (TYPE_NAME (SYMBOL_TYPE (sym
)) == NULL
)
1152 /* gcc-2.6 or later (when using -fvtable-thunks)
1153 emits a unique named type for a vtable entry.
1154 Some gdb code depends on that specific name. */
1155 extern const char vtbl_ptr_name
[];
1157 if ((TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_PTR
1158 && strcmp (SYMBOL_LINKAGE_NAME (sym
), vtbl_ptr_name
))
1159 || TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_FUNC
)
1161 /* If we are giving a name to a type such as "pointer to
1162 foo" or "function returning foo", we better not set
1163 the TYPE_NAME. If the program contains "typedef char
1164 *caddr_t;", we don't want all variables of type char
1165 * to print as caddr_t. This is not just a
1166 consequence of GDB's type management; PCC and GCC (at
1167 least through version 2.4) both output variables of
1168 either type char * or caddr_t with the type number
1169 defined in the 't' symbol for caddr_t. If a future
1170 compiler cleans this up it GDB is not ready for it
1171 yet, but if it becomes ready we somehow need to
1172 disable this check (without breaking the PCC/GCC2.4
1177 Fortunately, this check seems not to be necessary
1178 for anything except pointers or functions. */
1179 /* ezannoni: 2000-10-26. This seems to apply for
1180 versions of gcc older than 2.8. This was the original
1181 problem: with the following code gdb would tell that
1182 the type for name1 is caddr_t, and func is char()
1183 typedef char *caddr_t;
1195 /* Pascal accepts names for pointer types. */
1196 if (current_subfile
->language
== language_pascal
)
1198 TYPE_NAME (SYMBOL_TYPE (sym
)) = SYMBOL_LINKAGE_NAME (sym
);
1202 TYPE_NAME (SYMBOL_TYPE (sym
)) = SYMBOL_LINKAGE_NAME (sym
);
1205 add_symbol_to_list (sym
, &file_symbols
);
1209 /* Create the STRUCT_DOMAIN clone. */
1210 struct symbol
*struct_sym
= (struct symbol
*)
1211 obstack_alloc (&objfile
->objfile_obstack
, sizeof (struct symbol
));
1214 SYMBOL_CLASS (struct_sym
) = LOC_TYPEDEF
;
1215 SYMBOL_VALUE (struct_sym
) = valu
;
1216 SYMBOL_DOMAIN (struct_sym
) = STRUCT_DOMAIN
;
1217 if (TYPE_NAME (SYMBOL_TYPE (sym
)) == 0)
1218 TYPE_NAME (SYMBOL_TYPE (sym
))
1219 = obconcat (&objfile
->objfile_obstack
, "", "",
1220 SYMBOL_LINKAGE_NAME (sym
));
1221 add_symbol_to_list (struct_sym
, &file_symbols
);
1227 /* Struct, union, or enum tag. For GNU C++, this can be be followed
1228 by 't' which means we are typedef'ing it as well. */
1229 synonym
= *p
== 't';
1234 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
1236 /* For a nameless type, we don't want a create a symbol, thus we
1237 did not use `sym'. Return without further processing. */
1241 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
1242 SYMBOL_VALUE (sym
) = valu
;
1243 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
1244 if (TYPE_TAG_NAME (SYMBOL_TYPE (sym
)) == 0)
1245 TYPE_TAG_NAME (SYMBOL_TYPE (sym
))
1246 = obconcat (&objfile
->objfile_obstack
, "", "",
1247 SYMBOL_LINKAGE_NAME (sym
));
1248 add_symbol_to_list (sym
, &file_symbols
);
1252 /* Clone the sym and then modify it. */
1253 struct symbol
*typedef_sym
= (struct symbol
*)
1254 obstack_alloc (&objfile
->objfile_obstack
, sizeof (struct symbol
));
1255 *typedef_sym
= *sym
;
1256 SYMBOL_CLASS (typedef_sym
) = LOC_TYPEDEF
;
1257 SYMBOL_VALUE (typedef_sym
) = valu
;
1258 SYMBOL_DOMAIN (typedef_sym
) = VAR_DOMAIN
;
1259 if (TYPE_NAME (SYMBOL_TYPE (sym
)) == 0)
1260 TYPE_NAME (SYMBOL_TYPE (sym
))
1261 = obconcat (&objfile
->objfile_obstack
, "", "",
1262 SYMBOL_LINKAGE_NAME (sym
));
1263 add_symbol_to_list (typedef_sym
, &file_symbols
);
1268 /* Static symbol of local scope */
1269 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
1270 SYMBOL_CLASS (sym
) = LOC_STATIC
;
1271 SYMBOL_VALUE_ADDRESS (sym
) = valu
;
1272 if (gdbarch_static_transform_name_p (gdbarch
)
1273 && gdbarch_static_transform_name (gdbarch
,
1274 SYMBOL_LINKAGE_NAME (sym
))
1275 != SYMBOL_LINKAGE_NAME (sym
))
1277 struct minimal_symbol
*msym
;
1278 msym
= lookup_minimal_symbol (SYMBOL_LINKAGE_NAME (sym
), NULL
, objfile
);
1281 char *new_name
= gdbarch_static_transform_name
1282 (gdbarch
, SYMBOL_LINKAGE_NAME (sym
));
1283 SYMBOL_SET_LINKAGE_NAME (sym
, new_name
);
1284 SYMBOL_VALUE_ADDRESS (sym
) = SYMBOL_VALUE_ADDRESS (msym
);
1287 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1288 add_symbol_to_list (sym
, &local_symbols
);
1292 /* Reference parameter */
1293 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
1294 SYMBOL_CLASS (sym
) = LOC_REF_ARG
;
1295 SYMBOL_IS_ARGUMENT (sym
) = 1;
1296 SYMBOL_VALUE (sym
) = valu
;
1297 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1298 add_symbol_to_list (sym
, &local_symbols
);
1302 /* Reference parameter which is in a register. */
1303 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
1304 SYMBOL_CLASS (sym
) = LOC_REGPARM_ADDR
;
1305 SYMBOL_REGISTER_OPS (sym
) = &stab_register_funcs
;
1306 SYMBOL_IS_ARGUMENT (sym
) = 1;
1307 SYMBOL_VALUE (sym
) = valu
;
1308 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1309 add_symbol_to_list (sym
, &local_symbols
);
1313 /* This is used by Sun FORTRAN for "function result value".
1314 Sun claims ("dbx and dbxtool interfaces", 2nd ed)
1315 that Pascal uses it too, but when I tried it Pascal used
1316 "x:3" (local symbol) instead. */
1317 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
1318 SYMBOL_CLASS (sym
) = LOC_LOCAL
;
1319 SYMBOL_VALUE (sym
) = valu
;
1320 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1321 add_symbol_to_list (sym
, &local_symbols
);
1325 SYMBOL_TYPE (sym
) = error_type (&p
, objfile
);
1326 SYMBOL_CLASS (sym
) = LOC_CONST
;
1327 SYMBOL_VALUE (sym
) = 0;
1328 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1329 add_symbol_to_list (sym
, &file_symbols
);
1333 /* Some systems pass variables of certain types by reference instead
1334 of by value, i.e. they will pass the address of a structure (in a
1335 register or on the stack) instead of the structure itself. */
1337 if (gdbarch_stabs_argument_has_addr (gdbarch
, SYMBOL_TYPE (sym
))
1338 && SYMBOL_IS_ARGUMENT (sym
))
1340 /* We have to convert LOC_REGISTER to LOC_REGPARM_ADDR (for
1341 variables passed in a register). */
1342 if (SYMBOL_CLASS (sym
) == LOC_REGISTER
)
1343 SYMBOL_CLASS (sym
) = LOC_REGPARM_ADDR
;
1344 /* Likewise for converting LOC_ARG to LOC_REF_ARG (for the 7th
1345 and subsequent arguments on SPARC, for example). */
1346 else if (SYMBOL_CLASS (sym
) == LOC_ARG
)
1347 SYMBOL_CLASS (sym
) = LOC_REF_ARG
;
1353 /* Skip rest of this symbol and return an error type.
1355 General notes on error recovery: error_type always skips to the
1356 end of the symbol (modulo cretinous dbx symbol name continuation).
1357 Thus code like this:
1359 if (*(*pp)++ != ';')
1360 return error_type (pp, objfile);
1362 is wrong because if *pp starts out pointing at '\0' (typically as the
1363 result of an earlier error), it will be incremented to point to the
1364 start of the next symbol, which might produce strange results, at least
1365 if you run off the end of the string table. Instead use
1368 return error_type (pp, objfile);
1374 foo = error_type (pp, objfile);
1378 And in case it isn't obvious, the point of all this hair is so the compiler
1379 can define new types and new syntaxes, and old versions of the
1380 debugger will be able to read the new symbol tables. */
1382 static struct type
*
1383 error_type (char **pp
, struct objfile
*objfile
)
1385 complaint (&symfile_complaints
, _("couldn't parse type; debugger out of date?"));
1388 /* Skip to end of symbol. */
1389 while (**pp
!= '\0')
1394 /* Check for and handle cretinous dbx symbol name continuation! */
1395 if ((*pp
)[-1] == '\\' || (*pp
)[-1] == '?')
1397 *pp
= next_symbol_text (objfile
);
1404 return objfile_type (objfile
)->builtin_error
;
1408 /* Read type information or a type definition; return the type. Even
1409 though this routine accepts either type information or a type
1410 definition, the distinction is relevant--some parts of stabsread.c
1411 assume that type information starts with a digit, '-', or '(' in
1412 deciding whether to call read_type. */
1414 static struct type
*
1415 read_type (char **pp
, struct objfile
*objfile
)
1417 struct type
*type
= 0;
1420 char type_descriptor
;
1422 /* Size in bits of type if specified by a type attribute, or -1 if
1423 there is no size attribute. */
1426 /* Used to distinguish string and bitstring from char-array and set. */
1429 /* Used to distinguish vector from array. */
1432 /* Read type number if present. The type number may be omitted.
1433 for instance in a two-dimensional array declared with type
1434 "ar1;1;10;ar1;1;10;4". */
1435 if ((**pp
>= '0' && **pp
<= '9')
1439 if (read_type_number (pp
, typenums
) != 0)
1440 return error_type (pp
, objfile
);
1444 /* Type is not being defined here. Either it already
1445 exists, or this is a forward reference to it.
1446 dbx_alloc_type handles both cases. */
1447 type
= dbx_alloc_type (typenums
, objfile
);
1449 /* If this is a forward reference, arrange to complain if it
1450 doesn't get patched up by the time we're done
1452 if (TYPE_CODE (type
) == TYPE_CODE_UNDEF
)
1453 add_undefined_type (type
, typenums
);
1458 /* Type is being defined here. */
1460 Also skip the type descriptor - we get it below with (*pp)[-1]. */
1465 /* 'typenums=' not present, type is anonymous. Read and return
1466 the definition, but don't put it in the type vector. */
1467 typenums
[0] = typenums
[1] = -1;
1472 type_descriptor
= (*pp
)[-1];
1473 switch (type_descriptor
)
1477 enum type_code code
;
1479 /* Used to index through file_symbols. */
1480 struct pending
*ppt
;
1483 /* Name including "struct", etc. */
1487 char *from
, *to
, *p
, *q1
, *q2
;
1489 /* Set the type code according to the following letter. */
1493 code
= TYPE_CODE_STRUCT
;
1496 code
= TYPE_CODE_UNION
;
1499 code
= TYPE_CODE_ENUM
;
1503 /* Complain and keep going, so compilers can invent new
1504 cross-reference types. */
1505 complaint (&symfile_complaints
,
1506 _("Unrecognized cross-reference type `%c'"), (*pp
)[0]);
1507 code
= TYPE_CODE_STRUCT
;
1512 q1
= strchr (*pp
, '<');
1513 p
= strchr (*pp
, ':');
1515 return error_type (pp
, objfile
);
1516 if (q1
&& p
> q1
&& p
[1] == ':')
1518 int nesting_level
= 0;
1519 for (q2
= q1
; *q2
; q2
++)
1523 else if (*q2
== '>')
1525 else if (*q2
== ':' && nesting_level
== 0)
1530 return error_type (pp
, objfile
);
1533 if (current_subfile
->language
== language_cplus
)
1535 char *new_name
, *name
= alloca (p
- *pp
+ 1);
1536 memcpy (name
, *pp
, p
- *pp
);
1537 name
[p
- *pp
] = '\0';
1538 new_name
= cp_canonicalize_string (name
);
1539 if (new_name
!= NULL
)
1541 type_name
= obsavestring (new_name
, strlen (new_name
),
1542 &objfile
->objfile_obstack
);
1546 if (type_name
== NULL
)
1549 (char *) obstack_alloc (&objfile
->objfile_obstack
, p
- *pp
+ 1);
1551 /* Copy the name. */
1558 /* Set the pointer ahead of the name which we just read, and
1563 /* If this type has already been declared, then reuse the same
1564 type, rather than allocating a new one. This saves some
1567 for (ppt
= file_symbols
; ppt
; ppt
= ppt
->next
)
1568 for (i
= 0; i
< ppt
->nsyms
; i
++)
1570 struct symbol
*sym
= ppt
->symbol
[i
];
1572 if (SYMBOL_CLASS (sym
) == LOC_TYPEDEF
1573 && SYMBOL_DOMAIN (sym
) == STRUCT_DOMAIN
1574 && (TYPE_CODE (SYMBOL_TYPE (sym
)) == code
)
1575 && strcmp (SYMBOL_LINKAGE_NAME (sym
), type_name
) == 0)
1577 obstack_free (&objfile
->objfile_obstack
, type_name
);
1578 type
= SYMBOL_TYPE (sym
);
1579 if (typenums
[0] != -1)
1580 *dbx_lookup_type (typenums
, objfile
) = type
;
1585 /* Didn't find the type to which this refers, so we must
1586 be dealing with a forward reference. Allocate a type
1587 structure for it, and keep track of it so we can
1588 fill in the rest of the fields when we get the full
1590 type
= dbx_alloc_type (typenums
, objfile
);
1591 TYPE_CODE (type
) = code
;
1592 TYPE_TAG_NAME (type
) = type_name
;
1593 INIT_CPLUS_SPECIFIC (type
);
1594 TYPE_STUB (type
) = 1;
1596 add_undefined_type (type
, typenums
);
1600 case '-': /* RS/6000 built-in type */
1614 /* We deal with something like t(1,2)=(3,4)=... which
1615 the Lucid compiler and recent gcc versions (post 2.7.3) use. */
1617 /* Allocate and enter the typedef type first.
1618 This handles recursive types. */
1619 type
= dbx_alloc_type (typenums
, objfile
);
1620 TYPE_CODE (type
) = TYPE_CODE_TYPEDEF
;
1622 struct type
*xtype
= read_type (pp
, objfile
);
1625 /* It's being defined as itself. That means it is "void". */
1626 TYPE_CODE (type
) = TYPE_CODE_VOID
;
1627 TYPE_LENGTH (type
) = 1;
1629 else if (type_size
>= 0 || is_string
)
1631 /* This is the absolute wrong way to construct types. Every
1632 other debug format has found a way around this problem and
1633 the related problems with unnecessarily stubbed types;
1634 someone motivated should attempt to clean up the issue
1635 here as well. Once a type pointed to has been created it
1636 should not be modified.
1638 Well, it's not *absolutely* wrong. Constructing recursive
1639 types (trees, linked lists) necessarily entails modifying
1640 types after creating them. Constructing any loop structure
1641 entails side effects. The Dwarf 2 reader does handle this
1642 more gracefully (it never constructs more than once
1643 instance of a type object, so it doesn't have to copy type
1644 objects wholesale), but it still mutates type objects after
1645 other folks have references to them.
1647 Keep in mind that this circularity/mutation issue shows up
1648 at the source language level, too: C's "incomplete types",
1649 for example. So the proper cleanup, I think, would be to
1650 limit GDB's type smashing to match exactly those required
1651 by the source language. So GDB could have a
1652 "complete_this_type" function, but never create unnecessary
1653 copies of a type otherwise. */
1654 replace_type (type
, xtype
);
1655 TYPE_NAME (type
) = NULL
;
1656 TYPE_TAG_NAME (type
) = NULL
;
1660 TYPE_TARGET_STUB (type
) = 1;
1661 TYPE_TARGET_TYPE (type
) = xtype
;
1666 /* In the following types, we must be sure to overwrite any existing
1667 type that the typenums refer to, rather than allocating a new one
1668 and making the typenums point to the new one. This is because there
1669 may already be pointers to the existing type (if it had been
1670 forward-referenced), and we must change it to a pointer, function,
1671 reference, or whatever, *in-place*. */
1673 case '*': /* Pointer to another type */
1674 type1
= read_type (pp
, objfile
);
1675 type
= make_pointer_type (type1
, dbx_lookup_type (typenums
, objfile
));
1678 case '&': /* Reference to another type */
1679 type1
= read_type (pp
, objfile
);
1680 type
= make_reference_type (type1
, dbx_lookup_type (typenums
, objfile
));
1683 case 'f': /* Function returning another type */
1684 type1
= read_type (pp
, objfile
);
1685 type
= make_function_type (type1
, dbx_lookup_type (typenums
, objfile
),
1689 case 'g': /* Prototyped function. (Sun) */
1691 /* Unresolved questions:
1693 - According to Sun's ``STABS Interface Manual'', for 'f'
1694 and 'F' symbol descriptors, a `0' in the argument type list
1695 indicates a varargs function. But it doesn't say how 'g'
1696 type descriptors represent that info. Someone with access
1697 to Sun's toolchain should try it out.
1699 - According to the comment in define_symbol (search for
1700 `process_prototype_types:'), Sun emits integer arguments as
1701 types which ref themselves --- like `void' types. Do we
1702 have to deal with that here, too? Again, someone with
1703 access to Sun's toolchain should try it out and let us
1706 const char *type_start
= (*pp
) - 1;
1707 struct type
*return_type
= read_type (pp
, objfile
);
1708 struct type
*func_type
1709 = make_function_type (return_type
,
1710 dbx_lookup_type (typenums
, objfile
), objfile
);
1713 struct type_list
*next
;
1717 while (**pp
&& **pp
!= '#')
1719 struct type
*arg_type
= read_type (pp
, objfile
);
1720 struct type_list
*new = alloca (sizeof (*new));
1721 new->type
= arg_type
;
1722 new->next
= arg_types
;
1730 complaint (&symfile_complaints
,
1731 _("Prototyped function type didn't end arguments with `#':\n%s"),
1735 /* If there is just one argument whose type is `void', then
1736 that's just an empty argument list. */
1738 && ! arg_types
->next
1739 && TYPE_CODE (arg_types
->type
) == TYPE_CODE_VOID
)
1742 TYPE_FIELDS (func_type
)
1743 = (struct field
*) TYPE_ALLOC (func_type
,
1744 num_args
* sizeof (struct field
));
1745 memset (TYPE_FIELDS (func_type
), 0, num_args
* sizeof (struct field
));
1748 struct type_list
*t
;
1750 /* We stuck each argument type onto the front of the list
1751 when we read it, so the list is reversed. Build the
1752 fields array right-to-left. */
1753 for (t
= arg_types
, i
= num_args
- 1; t
; t
= t
->next
, i
--)
1754 TYPE_FIELD_TYPE (func_type
, i
) = t
->type
;
1756 TYPE_NFIELDS (func_type
) = num_args
;
1757 TYPE_PROTOTYPED (func_type
) = 1;
1763 case 'k': /* Const qualifier on some type (Sun) */
1764 type
= read_type (pp
, objfile
);
1765 type
= make_cv_type (1, TYPE_VOLATILE (type
), type
,
1766 dbx_lookup_type (typenums
, objfile
));
1769 case 'B': /* Volatile qual on some type (Sun) */
1770 type
= read_type (pp
, objfile
);
1771 type
= make_cv_type (TYPE_CONST (type
), 1, type
,
1772 dbx_lookup_type (typenums
, objfile
));
1776 if (isdigit (**pp
) || **pp
== '(' || **pp
== '-')
1777 { /* Member (class & variable) type */
1778 /* FIXME -- we should be doing smash_to_XXX types here. */
1780 struct type
*domain
= read_type (pp
, objfile
);
1781 struct type
*memtype
;
1784 /* Invalid member type data format. */
1785 return error_type (pp
, objfile
);
1788 memtype
= read_type (pp
, objfile
);
1789 type
= dbx_alloc_type (typenums
, objfile
);
1790 smash_to_memberptr_type (type
, domain
, memtype
);
1793 /* type attribute */
1796 /* Skip to the semicolon. */
1797 while (**pp
!= ';' && **pp
!= '\0')
1800 return error_type (pp
, objfile
);
1802 ++ * pp
; /* Skip the semicolon. */
1806 case 's': /* Size attribute */
1807 type_size
= atoi (attr
+ 1);
1812 case 'S': /* String attribute */
1813 /* FIXME: check to see if following type is array? */
1817 case 'V': /* Vector attribute */
1818 /* FIXME: check to see if following type is array? */
1823 /* Ignore unrecognized type attributes, so future compilers
1824 can invent new ones. */
1832 case '#': /* Method (class & fn) type */
1833 if ((*pp
)[0] == '#')
1835 /* We'll get the parameter types from the name. */
1836 struct type
*return_type
;
1839 return_type
= read_type (pp
, objfile
);
1840 if (*(*pp
)++ != ';')
1841 complaint (&symfile_complaints
,
1842 _("invalid (minimal) member type data format at symtab pos %d."),
1844 type
= allocate_stub_method (return_type
);
1845 if (typenums
[0] != -1)
1846 *dbx_lookup_type (typenums
, objfile
) = type
;
1850 struct type
*domain
= read_type (pp
, objfile
);
1851 struct type
*return_type
;
1856 /* Invalid member type data format. */
1857 return error_type (pp
, objfile
);
1861 return_type
= read_type (pp
, objfile
);
1862 args
= read_args (pp
, ';', objfile
, &nargs
, &varargs
);
1864 return error_type (pp
, objfile
);
1865 type
= dbx_alloc_type (typenums
, objfile
);
1866 smash_to_method_type (type
, domain
, return_type
, args
,
1871 case 'r': /* Range type */
1872 type
= read_range_type (pp
, typenums
, type_size
, objfile
);
1873 if (typenums
[0] != -1)
1874 *dbx_lookup_type (typenums
, objfile
) = type
;
1879 /* Sun ACC builtin int type */
1880 type
= read_sun_builtin_type (pp
, typenums
, objfile
);
1881 if (typenums
[0] != -1)
1882 *dbx_lookup_type (typenums
, objfile
) = type
;
1886 case 'R': /* Sun ACC builtin float type */
1887 type
= read_sun_floating_type (pp
, typenums
, objfile
);
1888 if (typenums
[0] != -1)
1889 *dbx_lookup_type (typenums
, objfile
) = type
;
1892 case 'e': /* Enumeration type */
1893 type
= dbx_alloc_type (typenums
, objfile
);
1894 type
= read_enum_type (pp
, type
, objfile
);
1895 if (typenums
[0] != -1)
1896 *dbx_lookup_type (typenums
, objfile
) = type
;
1899 case 's': /* Struct type */
1900 case 'u': /* Union type */
1902 enum type_code type_code
= TYPE_CODE_UNDEF
;
1903 type
= dbx_alloc_type (typenums
, objfile
);
1904 switch (type_descriptor
)
1907 type_code
= TYPE_CODE_STRUCT
;
1910 type_code
= TYPE_CODE_UNION
;
1913 type
= read_struct_type (pp
, type
, type_code
, objfile
);
1917 case 'a': /* Array type */
1919 return error_type (pp
, objfile
);
1922 type
= dbx_alloc_type (typenums
, objfile
);
1923 type
= read_array_type (pp
, type
, objfile
);
1925 TYPE_CODE (type
) = TYPE_CODE_STRING
;
1927 make_vector_type (type
);
1930 case 'S': /* Set or bitstring type */
1931 type1
= read_type (pp
, objfile
);
1932 type
= create_set_type ((struct type
*) NULL
, type1
);
1934 TYPE_CODE (type
) = TYPE_CODE_BITSTRING
;
1935 if (typenums
[0] != -1)
1936 *dbx_lookup_type (typenums
, objfile
) = type
;
1940 --*pp
; /* Go back to the symbol in error */
1941 /* Particularly important if it was \0! */
1942 return error_type (pp
, objfile
);
1947 warning (_("GDB internal error, type is NULL in stabsread.c."));
1948 return error_type (pp
, objfile
);
1951 /* Size specified in a type attribute overrides any other size. */
1952 if (type_size
!= -1)
1953 TYPE_LENGTH (type
) = (type_size
+ TARGET_CHAR_BIT
- 1) / TARGET_CHAR_BIT
;
1958 /* RS/6000 xlc/dbx combination uses a set of builtin types, starting from -1.
1959 Return the proper type node for a given builtin type number. */
1961 static const struct objfile_data
*rs6000_builtin_type_data
;
1963 static struct type
*
1964 rs6000_builtin_type (int typenum
, struct objfile
*objfile
)
1966 struct type
**negative_types
= objfile_data (objfile
, rs6000_builtin_type_data
);
1968 /* We recognize types numbered from -NUMBER_RECOGNIZED to -1. */
1969 #define NUMBER_RECOGNIZED 34
1970 struct type
*rettype
= NULL
;
1972 if (typenum
>= 0 || typenum
< -NUMBER_RECOGNIZED
)
1974 complaint (&symfile_complaints
, _("Unknown builtin type %d"), typenum
);
1975 return objfile_type (objfile
)->builtin_error
;
1978 if (!negative_types
)
1980 /* This includes an empty slot for type number -0. */
1981 negative_types
= OBSTACK_CALLOC (&objfile
->objfile_obstack
,
1982 NUMBER_RECOGNIZED
+ 1, struct type
*);
1983 set_objfile_data (objfile
, rs6000_builtin_type_data
, negative_types
);
1986 if (negative_types
[-typenum
] != NULL
)
1987 return negative_types
[-typenum
];
1989 #if TARGET_CHAR_BIT != 8
1990 #error This code wrong for TARGET_CHAR_BIT not 8
1991 /* These definitions all assume that TARGET_CHAR_BIT is 8. I think
1992 that if that ever becomes not true, the correct fix will be to
1993 make the size in the struct type to be in bits, not in units of
2000 /* The size of this and all the other types are fixed, defined
2001 by the debugging format. If there is a type called "int" which
2002 is other than 32 bits, then it should use a new negative type
2003 number (or avoid negative type numbers for that case).
2004 See stabs.texinfo. */
2005 rettype
= init_type (TYPE_CODE_INT
, 4, 0, "int", objfile
);
2008 rettype
= init_type (TYPE_CODE_INT
, 1, 0, "char", objfile
);
2011 rettype
= init_type (TYPE_CODE_INT
, 2, 0, "short", objfile
);
2014 rettype
= init_type (TYPE_CODE_INT
, 4, 0, "long", objfile
);
2017 rettype
= init_type (TYPE_CODE_INT
, 1, TYPE_FLAG_UNSIGNED
,
2018 "unsigned char", objfile
);
2021 rettype
= init_type (TYPE_CODE_INT
, 1, 0, "signed char", objfile
);
2024 rettype
= init_type (TYPE_CODE_INT
, 2, TYPE_FLAG_UNSIGNED
,
2025 "unsigned short", objfile
);
2028 rettype
= init_type (TYPE_CODE_INT
, 4, TYPE_FLAG_UNSIGNED
,
2029 "unsigned int", objfile
);
2032 rettype
= init_type (TYPE_CODE_INT
, 4, TYPE_FLAG_UNSIGNED
,
2033 "unsigned", objfile
);
2035 rettype
= init_type (TYPE_CODE_INT
, 4, TYPE_FLAG_UNSIGNED
,
2036 "unsigned long", objfile
);
2039 rettype
= init_type (TYPE_CODE_VOID
, 1, 0, "void", objfile
);
2042 /* IEEE single precision (32 bit). */
2043 rettype
= init_type (TYPE_CODE_FLT
, 4, 0, "float", objfile
);
2046 /* IEEE double precision (64 bit). */
2047 rettype
= init_type (TYPE_CODE_FLT
, 8, 0, "double", objfile
);
2050 /* This is an IEEE double on the RS/6000, and different machines with
2051 different sizes for "long double" should use different negative
2052 type numbers. See stabs.texinfo. */
2053 rettype
= init_type (TYPE_CODE_FLT
, 8, 0, "long double", objfile
);
2056 rettype
= init_type (TYPE_CODE_INT
, 4, 0, "integer", objfile
);
2059 rettype
= init_type (TYPE_CODE_BOOL
, 4, TYPE_FLAG_UNSIGNED
,
2060 "boolean", objfile
);
2063 rettype
= init_type (TYPE_CODE_FLT
, 4, 0, "short real", objfile
);
2066 rettype
= init_type (TYPE_CODE_FLT
, 8, 0, "real", objfile
);
2069 rettype
= init_type (TYPE_CODE_ERROR
, 0, 0, "stringptr", objfile
);
2072 rettype
= init_type (TYPE_CODE_CHAR
, 1, TYPE_FLAG_UNSIGNED
,
2073 "character", objfile
);
2076 rettype
= init_type (TYPE_CODE_BOOL
, 1, TYPE_FLAG_UNSIGNED
,
2077 "logical*1", objfile
);
2080 rettype
= init_type (TYPE_CODE_BOOL
, 2, TYPE_FLAG_UNSIGNED
,
2081 "logical*2", objfile
);
2084 rettype
= init_type (TYPE_CODE_BOOL
, 4, TYPE_FLAG_UNSIGNED
,
2085 "logical*4", objfile
);
2088 rettype
= init_type (TYPE_CODE_BOOL
, 4, TYPE_FLAG_UNSIGNED
,
2089 "logical", objfile
);
2092 /* Complex type consisting of two IEEE single precision values. */
2093 rettype
= init_type (TYPE_CODE_COMPLEX
, 8, 0, "complex", objfile
);
2094 TYPE_TARGET_TYPE (rettype
) = init_type (TYPE_CODE_FLT
, 4, 0, "float",
2098 /* Complex type consisting of two IEEE double precision values. */
2099 rettype
= init_type (TYPE_CODE_COMPLEX
, 16, 0, "double complex", NULL
);
2100 TYPE_TARGET_TYPE (rettype
) = init_type (TYPE_CODE_FLT
, 8, 0, "double",
2104 rettype
= init_type (TYPE_CODE_INT
, 1, 0, "integer*1", objfile
);
2107 rettype
= init_type (TYPE_CODE_INT
, 2, 0, "integer*2", objfile
);
2110 rettype
= init_type (TYPE_CODE_INT
, 4, 0, "integer*4", objfile
);
2113 rettype
= init_type (TYPE_CODE_CHAR
, 2, 0, "wchar", objfile
);
2116 rettype
= init_type (TYPE_CODE_INT
, 8, 0, "long long", objfile
);
2119 rettype
= init_type (TYPE_CODE_INT
, 8, TYPE_FLAG_UNSIGNED
,
2120 "unsigned long long", objfile
);
2123 rettype
= init_type (TYPE_CODE_INT
, 8, TYPE_FLAG_UNSIGNED
,
2124 "logical*8", objfile
);
2127 rettype
= init_type (TYPE_CODE_INT
, 8, 0, "integer*8", objfile
);
2130 negative_types
[-typenum
] = rettype
;
2134 /* This page contains subroutines of read_type. */
2136 /* Replace *OLD_NAME with the method name portion of PHYSNAME. */
2139 update_method_name_from_physname (char **old_name
, char *physname
)
2143 method_name
= method_name_from_physname (physname
);
2145 if (method_name
== NULL
)
2147 complaint (&symfile_complaints
,
2148 _("Method has bad physname %s\n"), physname
);
2152 if (strcmp (*old_name
, method_name
) != 0)
2155 *old_name
= method_name
;
2158 xfree (method_name
);
2161 /* Read member function stabs info for C++ classes. The form of each member
2164 NAME :: TYPENUM[=type definition] ARGS : PHYSNAME ;
2166 An example with two member functions is:
2168 afunc1::20=##15;:i;2A.;afunc2::20:i;2A.;
2170 For the case of overloaded operators, the format is op$::*.funcs, where
2171 $ is the CPLUS_MARKER (usually '$'), `*' holds the place for an operator
2172 name (such as `+=') and `.' marks the end of the operator name.
2174 Returns 1 for success, 0 for failure. */
2177 read_member_functions (struct field_info
*fip
, char **pp
, struct type
*type
,
2178 struct objfile
*objfile
)
2182 /* Total number of member functions defined in this class. If the class
2183 defines two `f' functions, and one `g' function, then this will have
2185 int total_length
= 0;
2189 struct next_fnfield
*next
;
2190 struct fn_field fn_field
;
2193 struct type
*look_ahead_type
;
2194 struct next_fnfieldlist
*new_fnlist
;
2195 struct next_fnfield
*new_sublist
;
2199 /* Process each list until we find something that is not a member function
2200 or find the end of the functions. */
2204 /* We should be positioned at the start of the function name.
2205 Scan forward to find the first ':' and if it is not the
2206 first of a "::" delimiter, then this is not a member function. */
2218 look_ahead_type
= NULL
;
2221 new_fnlist
= (struct next_fnfieldlist
*)
2222 xmalloc (sizeof (struct next_fnfieldlist
));
2223 make_cleanup (xfree
, new_fnlist
);
2224 memset (new_fnlist
, 0, sizeof (struct next_fnfieldlist
));
2226 if ((*pp
)[0] == 'o' && (*pp
)[1] == 'p' && is_cplus_marker ((*pp
)[2]))
2228 /* This is a completely wierd case. In order to stuff in the
2229 names that might contain colons (the usual name delimiter),
2230 Mike Tiemann defined a different name format which is
2231 signalled if the identifier is "op$". In that case, the
2232 format is "op$::XXXX." where XXXX is the name. This is
2233 used for names like "+" or "=". YUUUUUUUK! FIXME! */
2234 /* This lets the user type "break operator+".
2235 We could just put in "+" as the name, but that wouldn't
2237 static char opname
[32] = "op$";
2238 char *o
= opname
+ 3;
2240 /* Skip past '::'. */
2243 STABS_CONTINUE (pp
, objfile
);
2249 main_fn_name
= savestring (opname
, o
- opname
);
2255 main_fn_name
= savestring (*pp
, p
- *pp
);
2256 /* Skip past '::'. */
2259 new_fnlist
->fn_fieldlist
.name
= main_fn_name
;
2264 (struct next_fnfield
*) xmalloc (sizeof (struct next_fnfield
));
2265 make_cleanup (xfree
, new_sublist
);
2266 memset (new_sublist
, 0, sizeof (struct next_fnfield
));
2268 /* Check for and handle cretinous dbx symbol name continuation! */
2269 if (look_ahead_type
== NULL
)
2272 STABS_CONTINUE (pp
, objfile
);
2274 new_sublist
->fn_field
.type
= read_type (pp
, objfile
);
2277 /* Invalid symtab info for member function. */
2283 /* g++ version 1 kludge */
2284 new_sublist
->fn_field
.type
= look_ahead_type
;
2285 look_ahead_type
= NULL
;
2295 /* If this is just a stub, then we don't have the real name here. */
2297 if (TYPE_STUB (new_sublist
->fn_field
.type
))
2299 if (!TYPE_DOMAIN_TYPE (new_sublist
->fn_field
.type
))
2300 TYPE_DOMAIN_TYPE (new_sublist
->fn_field
.type
) = type
;
2301 new_sublist
->fn_field
.is_stub
= 1;
2303 new_sublist
->fn_field
.physname
= savestring (*pp
, p
- *pp
);
2306 /* Set this member function's visibility fields. */
2309 case VISIBILITY_PRIVATE
:
2310 new_sublist
->fn_field
.is_private
= 1;
2312 case VISIBILITY_PROTECTED
:
2313 new_sublist
->fn_field
.is_protected
= 1;
2317 STABS_CONTINUE (pp
, objfile
);
2320 case 'A': /* Normal functions. */
2321 new_sublist
->fn_field
.is_const
= 0;
2322 new_sublist
->fn_field
.is_volatile
= 0;
2325 case 'B': /* `const' member functions. */
2326 new_sublist
->fn_field
.is_const
= 1;
2327 new_sublist
->fn_field
.is_volatile
= 0;
2330 case 'C': /* `volatile' member function. */
2331 new_sublist
->fn_field
.is_const
= 0;
2332 new_sublist
->fn_field
.is_volatile
= 1;
2335 case 'D': /* `const volatile' member function. */
2336 new_sublist
->fn_field
.is_const
= 1;
2337 new_sublist
->fn_field
.is_volatile
= 1;
2340 case '*': /* File compiled with g++ version 1 -- no info */
2345 complaint (&symfile_complaints
,
2346 _("const/volatile indicator missing, got '%c'"), **pp
);
2355 /* virtual member function, followed by index.
2356 The sign bit is set to distinguish pointers-to-methods
2357 from virtual function indicies. Since the array is
2358 in words, the quantity must be shifted left by 1
2359 on 16 bit machine, and by 2 on 32 bit machine, forcing
2360 the sign bit out, and usable as a valid index into
2361 the array. Remove the sign bit here. */
2362 new_sublist
->fn_field
.voffset
=
2363 (0x7fffffff & read_huge_number (pp
, ';', &nbits
, 0)) + 2;
2367 STABS_CONTINUE (pp
, objfile
);
2368 if (**pp
== ';' || **pp
== '\0')
2370 /* Must be g++ version 1. */
2371 new_sublist
->fn_field
.fcontext
= 0;
2375 /* Figure out from whence this virtual function came.
2376 It may belong to virtual function table of
2377 one of its baseclasses. */
2378 look_ahead_type
= read_type (pp
, objfile
);
2381 /* g++ version 1 overloaded methods. */
2385 new_sublist
->fn_field
.fcontext
= look_ahead_type
;
2394 look_ahead_type
= NULL
;
2400 /* static member function. */
2402 int slen
= strlen (main_fn_name
);
2404 new_sublist
->fn_field
.voffset
= VOFFSET_STATIC
;
2406 /* For static member functions, we can't tell if they
2407 are stubbed, as they are put out as functions, and not as
2409 GCC v2 emits the fully mangled name if
2410 dbxout.c:flag_minimal_debug is not set, so we have to
2411 detect a fully mangled physname here and set is_stub
2412 accordingly. Fully mangled physnames in v2 start with
2413 the member function name, followed by two underscores.
2414 GCC v3 currently always emits stubbed member functions,
2415 but with fully mangled physnames, which start with _Z. */
2416 if (!(strncmp (new_sublist
->fn_field
.physname
,
2417 main_fn_name
, slen
) == 0
2418 && new_sublist
->fn_field
.physname
[slen
] == '_'
2419 && new_sublist
->fn_field
.physname
[slen
+ 1] == '_'))
2421 new_sublist
->fn_field
.is_stub
= 1;
2428 complaint (&symfile_complaints
,
2429 _("member function type missing, got '%c'"), (*pp
)[-1]);
2430 /* Fall through into normal member function. */
2433 /* normal member function. */
2434 new_sublist
->fn_field
.voffset
= 0;
2435 new_sublist
->fn_field
.fcontext
= 0;
2439 new_sublist
->next
= sublist
;
2440 sublist
= new_sublist
;
2442 STABS_CONTINUE (pp
, objfile
);
2444 while (**pp
!= ';' && **pp
!= '\0');
2447 STABS_CONTINUE (pp
, objfile
);
2449 /* Skip GCC 3.X member functions which are duplicates of the callable
2450 constructor/destructor. */
2451 if (strcmp_iw (main_fn_name
, "__base_ctor ") == 0
2452 || strcmp_iw (main_fn_name
, "__base_dtor ") == 0
2453 || strcmp (main_fn_name
, "__deleting_dtor") == 0)
2455 xfree (main_fn_name
);
2460 int has_destructor
= 0, has_other
= 0;
2462 struct next_fnfield
*tmp_sublist
;
2464 /* Various versions of GCC emit various mostly-useless
2465 strings in the name field for special member functions.
2467 For stub methods, we need to defer correcting the name
2468 until we are ready to unstub the method, because the current
2469 name string is used by gdb_mangle_name. The only stub methods
2470 of concern here are GNU v2 operators; other methods have their
2471 names correct (see caveat below).
2473 For non-stub methods, in GNU v3, we have a complete physname.
2474 Therefore we can safely correct the name now. This primarily
2475 affects constructors and destructors, whose name will be
2476 __comp_ctor or __comp_dtor instead of Foo or ~Foo. Cast
2477 operators will also have incorrect names; for instance,
2478 "operator int" will be named "operator i" (i.e. the type is
2481 For non-stub methods in GNU v2, we have no easy way to
2482 know if we have a complete physname or not. For most
2483 methods the result depends on the platform (if CPLUS_MARKER
2484 can be `$' or `.', it will use minimal debug information, or
2485 otherwise the full physname will be included).
2487 Rather than dealing with this, we take a different approach.
2488 For v3 mangled names, we can use the full physname; for v2,
2489 we use cplus_demangle_opname (which is actually v2 specific),
2490 because the only interesting names are all operators - once again
2491 barring the caveat below. Skip this process if any method in the
2492 group is a stub, to prevent our fouling up the workings of
2495 The caveat: GCC 2.95.x (and earlier?) put constructors and
2496 destructors in the same method group. We need to split this
2497 into two groups, because they should have different names.
2498 So for each method group we check whether it contains both
2499 routines whose physname appears to be a destructor (the physnames
2500 for and destructors are always provided, due to quirks in v2
2501 mangling) and routines whose physname does not appear to be a
2502 destructor. If so then we break up the list into two halves.
2503 Even if the constructors and destructors aren't in the same group
2504 the destructor will still lack the leading tilde, so that also
2507 So, to summarize what we expect and handle here:
2509 Given Given Real Real Action
2510 method name physname physname method name
2512 __opi [none] __opi__3Foo operator int opname
2514 Foo _._3Foo _._3Foo ~Foo separate and
2516 operator i _ZN3FoocviEv _ZN3FoocviEv operator int demangle
2517 __comp_ctor _ZN3FooC1ERKS_ _ZN3FooC1ERKS_ Foo demangle
2520 tmp_sublist
= sublist
;
2521 while (tmp_sublist
!= NULL
)
2523 if (tmp_sublist
->fn_field
.is_stub
)
2525 if (tmp_sublist
->fn_field
.physname
[0] == '_'
2526 && tmp_sublist
->fn_field
.physname
[1] == 'Z')
2529 if (is_destructor_name (tmp_sublist
->fn_field
.physname
))
2534 tmp_sublist
= tmp_sublist
->next
;
2537 if (has_destructor
&& has_other
)
2539 struct next_fnfieldlist
*destr_fnlist
;
2540 struct next_fnfield
*last_sublist
;
2542 /* Create a new fn_fieldlist for the destructors. */
2544 destr_fnlist
= (struct next_fnfieldlist
*)
2545 xmalloc (sizeof (struct next_fnfieldlist
));
2546 make_cleanup (xfree
, destr_fnlist
);
2547 memset (destr_fnlist
, 0, sizeof (struct next_fnfieldlist
));
2548 destr_fnlist
->fn_fieldlist
.name
2549 = obconcat (&objfile
->objfile_obstack
, "", "~",
2550 new_fnlist
->fn_fieldlist
.name
);
2552 destr_fnlist
->fn_fieldlist
.fn_fields
= (struct fn_field
*)
2553 obstack_alloc (&objfile
->objfile_obstack
,
2554 sizeof (struct fn_field
) * has_destructor
);
2555 memset (destr_fnlist
->fn_fieldlist
.fn_fields
, 0,
2556 sizeof (struct fn_field
) * has_destructor
);
2557 tmp_sublist
= sublist
;
2558 last_sublist
= NULL
;
2560 while (tmp_sublist
!= NULL
)
2562 if (!is_destructor_name (tmp_sublist
->fn_field
.physname
))
2564 tmp_sublist
= tmp_sublist
->next
;
2568 destr_fnlist
->fn_fieldlist
.fn_fields
[i
++]
2569 = tmp_sublist
->fn_field
;
2571 last_sublist
->next
= tmp_sublist
->next
;
2573 sublist
= tmp_sublist
->next
;
2574 last_sublist
= tmp_sublist
;
2575 tmp_sublist
= tmp_sublist
->next
;
2578 destr_fnlist
->fn_fieldlist
.length
= has_destructor
;
2579 destr_fnlist
->next
= fip
->fnlist
;
2580 fip
->fnlist
= destr_fnlist
;
2582 total_length
+= has_destructor
;
2583 length
-= has_destructor
;
2587 /* v3 mangling prevents the use of abbreviated physnames,
2588 so we can do this here. There are stubbed methods in v3
2590 - in -gstabs instead of -gstabs+
2591 - or for static methods, which are output as a function type
2592 instead of a method type. */
2594 update_method_name_from_physname (&new_fnlist
->fn_fieldlist
.name
,
2595 sublist
->fn_field
.physname
);
2597 else if (has_destructor
&& new_fnlist
->fn_fieldlist
.name
[0] != '~')
2599 new_fnlist
->fn_fieldlist
.name
=
2600 concat ("~", main_fn_name
, (char *)NULL
);
2601 xfree (main_fn_name
);
2605 char dem_opname
[256];
2607 ret
= cplus_demangle_opname (new_fnlist
->fn_fieldlist
.name
,
2608 dem_opname
, DMGL_ANSI
);
2610 ret
= cplus_demangle_opname (new_fnlist
->fn_fieldlist
.name
,
2613 new_fnlist
->fn_fieldlist
.name
2614 = obsavestring (dem_opname
, strlen (dem_opname
),
2615 &objfile
->objfile_obstack
);
2618 new_fnlist
->fn_fieldlist
.fn_fields
= (struct fn_field
*)
2619 obstack_alloc (&objfile
->objfile_obstack
,
2620 sizeof (struct fn_field
) * length
);
2621 memset (new_fnlist
->fn_fieldlist
.fn_fields
, 0,
2622 sizeof (struct fn_field
) * length
);
2623 for (i
= length
; (i
--, sublist
); sublist
= sublist
->next
)
2625 new_fnlist
->fn_fieldlist
.fn_fields
[i
] = sublist
->fn_field
;
2628 new_fnlist
->fn_fieldlist
.length
= length
;
2629 new_fnlist
->next
= fip
->fnlist
;
2630 fip
->fnlist
= new_fnlist
;
2632 total_length
+= length
;
2638 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
2639 TYPE_FN_FIELDLISTS (type
) = (struct fn_fieldlist
*)
2640 TYPE_ALLOC (type
, sizeof (struct fn_fieldlist
) * nfn_fields
);
2641 memset (TYPE_FN_FIELDLISTS (type
), 0,
2642 sizeof (struct fn_fieldlist
) * nfn_fields
);
2643 TYPE_NFN_FIELDS (type
) = nfn_fields
;
2644 TYPE_NFN_FIELDS_TOTAL (type
) = total_length
;
2650 /* Special GNU C++ name.
2652 Returns 1 for success, 0 for failure. "failure" means that we can't
2653 keep parsing and it's time for error_type(). */
2656 read_cpp_abbrev (struct field_info
*fip
, char **pp
, struct type
*type
,
2657 struct objfile
*objfile
)
2662 struct type
*context
;
2672 /* At this point, *pp points to something like "22:23=*22...",
2673 where the type number before the ':' is the "context" and
2674 everything after is a regular type definition. Lookup the
2675 type, find it's name, and construct the field name. */
2677 context
= read_type (pp
, objfile
);
2681 case 'f': /* $vf -- a virtual function table pointer */
2682 name
= type_name_no_tag (context
);
2687 fip
->list
->field
.name
=
2688 obconcat (&objfile
->objfile_obstack
, vptr_name
, name
, "");
2691 case 'b': /* $vb -- a virtual bsomethingorother */
2692 name
= type_name_no_tag (context
);
2695 complaint (&symfile_complaints
,
2696 _("C++ abbreviated type name unknown at symtab pos %d"),
2700 fip
->list
->field
.name
=
2701 obconcat (&objfile
->objfile_obstack
, vb_name
, name
, "");
2705 invalid_cpp_abbrev_complaint (*pp
);
2706 fip
->list
->field
.name
=
2707 obconcat (&objfile
->objfile_obstack
,
2708 "INVALID_CPLUSPLUS_ABBREV", "", "");
2712 /* At this point, *pp points to the ':'. Skip it and read the
2718 invalid_cpp_abbrev_complaint (*pp
);
2721 fip
->list
->field
.type
= read_type (pp
, objfile
);
2723 (*pp
)++; /* Skip the comma. */
2729 FIELD_BITPOS (fip
->list
->field
) = read_huge_number (pp
, ';', &nbits
,
2734 /* This field is unpacked. */
2735 FIELD_BITSIZE (fip
->list
->field
) = 0;
2736 fip
->list
->visibility
= VISIBILITY_PRIVATE
;
2740 invalid_cpp_abbrev_complaint (*pp
);
2741 /* We have no idea what syntax an unrecognized abbrev would have, so
2742 better return 0. If we returned 1, we would need to at least advance
2743 *pp to avoid an infinite loop. */
2750 read_one_struct_field (struct field_info
*fip
, char **pp
, char *p
,
2751 struct type
*type
, struct objfile
*objfile
)
2753 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
2755 fip
->list
->field
.name
=
2756 obsavestring (*pp
, p
- *pp
, &objfile
->objfile_obstack
);
2759 /* This means we have a visibility for a field coming. */
2763 fip
->list
->visibility
= *(*pp
)++;
2767 /* normal dbx-style format, no explicit visibility */
2768 fip
->list
->visibility
= VISIBILITY_PUBLIC
;
2771 fip
->list
->field
.type
= read_type (pp
, objfile
);
2776 /* Possible future hook for nested types. */
2779 fip
->list
->field
.bitpos
= (long) -2; /* nested type */
2789 /* Static class member. */
2790 SET_FIELD_PHYSNAME (fip
->list
->field
, savestring (*pp
, p
- *pp
));
2794 else if (**pp
!= ',')
2796 /* Bad structure-type format. */
2797 stabs_general_complaint ("bad structure-type format");
2801 (*pp
)++; /* Skip the comma. */
2805 FIELD_BITPOS (fip
->list
->field
) = read_huge_number (pp
, ',', &nbits
, 0);
2808 stabs_general_complaint ("bad structure-type format");
2811 FIELD_BITSIZE (fip
->list
->field
) = read_huge_number (pp
, ';', &nbits
, 0);
2814 stabs_general_complaint ("bad structure-type format");
2819 if (FIELD_BITPOS (fip
->list
->field
) == 0
2820 && FIELD_BITSIZE (fip
->list
->field
) == 0)
2822 /* This can happen in two cases: (1) at least for gcc 2.4.5 or so,
2823 it is a field which has been optimized out. The correct stab for
2824 this case is to use VISIBILITY_IGNORE, but that is a recent
2825 invention. (2) It is a 0-size array. For example
2826 union { int num; char str[0]; } foo. Printing _("<no value>" for
2827 str in "p foo" is OK, since foo.str (and thus foo.str[3])
2828 will continue to work, and a 0-size array as a whole doesn't
2829 have any contents to print.
2831 I suspect this probably could also happen with gcc -gstabs (not
2832 -gstabs+) for static fields, and perhaps other C++ extensions.
2833 Hopefully few people use -gstabs with gdb, since it is intended
2834 for dbx compatibility. */
2836 /* Ignore this field. */
2837 fip
->list
->visibility
= VISIBILITY_IGNORE
;
2841 /* Detect an unpacked field and mark it as such.
2842 dbx gives a bit size for all fields.
2843 Note that forward refs cannot be packed,
2844 and treat enums as if they had the width of ints. */
2846 struct type
*field_type
= check_typedef (FIELD_TYPE (fip
->list
->field
));
2848 if (TYPE_CODE (field_type
) != TYPE_CODE_INT
2849 && TYPE_CODE (field_type
) != TYPE_CODE_RANGE
2850 && TYPE_CODE (field_type
) != TYPE_CODE_BOOL
2851 && TYPE_CODE (field_type
) != TYPE_CODE_ENUM
)
2853 FIELD_BITSIZE (fip
->list
->field
) = 0;
2855 if ((FIELD_BITSIZE (fip
->list
->field
)
2856 == TARGET_CHAR_BIT
* TYPE_LENGTH (field_type
)
2857 || (TYPE_CODE (field_type
) == TYPE_CODE_ENUM
2858 && FIELD_BITSIZE (fip
->list
->field
)
2859 == gdbarch_int_bit (gdbarch
))
2862 FIELD_BITPOS (fip
->list
->field
) % 8 == 0)
2864 FIELD_BITSIZE (fip
->list
->field
) = 0;
2870 /* Read struct or class data fields. They have the form:
2872 NAME : [VISIBILITY] TYPENUM , BITPOS , BITSIZE ;
2874 At the end, we see a semicolon instead of a field.
2876 In C++, this may wind up being NAME:?TYPENUM:PHYSNAME; for
2879 The optional VISIBILITY is one of:
2881 '/0' (VISIBILITY_PRIVATE)
2882 '/1' (VISIBILITY_PROTECTED)
2883 '/2' (VISIBILITY_PUBLIC)
2884 '/9' (VISIBILITY_IGNORE)
2886 or nothing, for C style fields with public visibility.
2888 Returns 1 for success, 0 for failure. */
2891 read_struct_fields (struct field_info
*fip
, char **pp
, struct type
*type
,
2892 struct objfile
*objfile
)
2895 struct nextfield
*new;
2897 /* We better set p right now, in case there are no fields at all... */
2901 /* Read each data member type until we find the terminating ';' at the end of
2902 the data member list, or break for some other reason such as finding the
2903 start of the member function list. */
2904 /* Stab string for structure/union does not end with two ';' in
2905 SUN C compiler 5.3 i.e. F6U2, hence check for end of string. */
2907 while (**pp
!= ';' && **pp
!= '\0')
2909 STABS_CONTINUE (pp
, objfile
);
2910 /* Get space to record the next field's data. */
2911 new = (struct nextfield
*) xmalloc (sizeof (struct nextfield
));
2912 make_cleanup (xfree
, new);
2913 memset (new, 0, sizeof (struct nextfield
));
2914 new->next
= fip
->list
;
2917 /* Get the field name. */
2920 /* If is starts with CPLUS_MARKER it is a special abbreviation,
2921 unless the CPLUS_MARKER is followed by an underscore, in
2922 which case it is just the name of an anonymous type, which we
2923 should handle like any other type name. */
2925 if (is_cplus_marker (p
[0]) && p
[1] != '_')
2927 if (!read_cpp_abbrev (fip
, pp
, type
, objfile
))
2932 /* Look for the ':' that separates the field name from the field
2933 values. Data members are delimited by a single ':', while member
2934 functions are delimited by a pair of ':'s. When we hit the member
2935 functions (if any), terminate scan loop and return. */
2937 while (*p
!= ':' && *p
!= '\0')
2944 /* Check to see if we have hit the member functions yet. */
2949 read_one_struct_field (fip
, pp
, p
, type
, objfile
);
2951 if (p
[0] == ':' && p
[1] == ':')
2953 /* (the deleted) chill the list of fields: the last entry (at
2954 the head) is a partially constructed entry which we now
2956 fip
->list
= fip
->list
->next
;
2961 /* The stabs for C++ derived classes contain baseclass information which
2962 is marked by a '!' character after the total size. This function is
2963 called when we encounter the baseclass marker, and slurps up all the
2964 baseclass information.
2966 Immediately following the '!' marker is the number of base classes that
2967 the class is derived from, followed by information for each base class.
2968 For each base class, there are two visibility specifiers, a bit offset
2969 to the base class information within the derived class, a reference to
2970 the type for the base class, and a terminating semicolon.
2972 A typical example, with two base classes, would be "!2,020,19;0264,21;".
2974 Baseclass information marker __________________|| | | | | | |
2975 Number of baseclasses __________________________| | | | | | |
2976 Visibility specifiers (2) ________________________| | | | | |
2977 Offset in bits from start of class _________________| | | | |
2978 Type number for base class ___________________________| | | |
2979 Visibility specifiers (2) _______________________________| | |
2980 Offset in bits from start of class ________________________| |
2981 Type number of base class ____________________________________|
2983 Return 1 for success, 0 for (error-type-inducing) failure. */
2989 read_baseclasses (struct field_info
*fip
, char **pp
, struct type
*type
,
2990 struct objfile
*objfile
)
2993 struct nextfield
*new;
3001 /* Skip the '!' baseclass information marker. */
3005 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
3008 TYPE_N_BASECLASSES (type
) = read_huge_number (pp
, ',', &nbits
, 0);
3014 /* Some stupid compilers have trouble with the following, so break
3015 it up into simpler expressions. */
3016 TYPE_FIELD_VIRTUAL_BITS (type
) = (B_TYPE
*)
3017 TYPE_ALLOC (type
, B_BYTES (TYPE_N_BASECLASSES (type
)));
3020 int num_bytes
= B_BYTES (TYPE_N_BASECLASSES (type
));
3023 pointer
= (char *) TYPE_ALLOC (type
, num_bytes
);
3024 TYPE_FIELD_VIRTUAL_BITS (type
) = (B_TYPE
*) pointer
;
3028 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type
), TYPE_N_BASECLASSES (type
));
3030 for (i
= 0; i
< TYPE_N_BASECLASSES (type
); i
++)
3032 new = (struct nextfield
*) xmalloc (sizeof (struct nextfield
));
3033 make_cleanup (xfree
, new);
3034 memset (new, 0, sizeof (struct nextfield
));
3035 new->next
= fip
->list
;
3037 FIELD_BITSIZE (new->field
) = 0; /* this should be an unpacked field! */
3039 STABS_CONTINUE (pp
, objfile
);
3043 /* Nothing to do. */
3046 SET_TYPE_FIELD_VIRTUAL (type
, i
);
3049 /* Unknown character. Complain and treat it as non-virtual. */
3051 complaint (&symfile_complaints
,
3052 _("Unknown virtual character `%c' for baseclass"), **pp
);
3057 new->visibility
= *(*pp
)++;
3058 switch (new->visibility
)
3060 case VISIBILITY_PRIVATE
:
3061 case VISIBILITY_PROTECTED
:
3062 case VISIBILITY_PUBLIC
:
3065 /* Bad visibility format. Complain and treat it as
3068 complaint (&symfile_complaints
,
3069 _("Unknown visibility `%c' for baseclass"),
3071 new->visibility
= VISIBILITY_PUBLIC
;
3078 /* The remaining value is the bit offset of the portion of the object
3079 corresponding to this baseclass. Always zero in the absence of
3080 multiple inheritance. */
3082 FIELD_BITPOS (new->field
) = read_huge_number (pp
, ',', &nbits
, 0);
3087 /* The last piece of baseclass information is the type of the
3088 base class. Read it, and remember it's type name as this
3091 new->field
.type
= read_type (pp
, objfile
);
3092 new->field
.name
= type_name_no_tag (new->field
.type
);
3094 /* skip trailing ';' and bump count of number of fields seen */
3103 /* The tail end of stabs for C++ classes that contain a virtual function
3104 pointer contains a tilde, a %, and a type number.
3105 The type number refers to the base class (possibly this class itself) which
3106 contains the vtable pointer for the current class.
3108 This function is called when we have parsed all the method declarations,
3109 so we can look for the vptr base class info. */
3112 read_tilde_fields (struct field_info
*fip
, char **pp
, struct type
*type
,
3113 struct objfile
*objfile
)
3117 STABS_CONTINUE (pp
, objfile
);
3119 /* If we are positioned at a ';', then skip it. */
3129 if (**pp
== '=' || **pp
== '+' || **pp
== '-')
3131 /* Obsolete flags that used to indicate the presence
3132 of constructors and/or destructors. */
3136 /* Read either a '%' or the final ';'. */
3137 if (*(*pp
)++ == '%')
3139 /* The next number is the type number of the base class
3140 (possibly our own class) which supplies the vtable for
3141 this class. Parse it out, and search that class to find
3142 its vtable pointer, and install those into TYPE_VPTR_BASETYPE
3143 and TYPE_VPTR_FIELDNO. */
3148 t
= read_type (pp
, objfile
);
3150 while (*p
!= '\0' && *p
!= ';')
3156 /* Premature end of symbol. */
3160 TYPE_VPTR_BASETYPE (type
) = t
;
3161 if (type
== t
) /* Our own class provides vtbl ptr */
3163 for (i
= TYPE_NFIELDS (t
) - 1;
3164 i
>= TYPE_N_BASECLASSES (t
);
3167 char *name
= TYPE_FIELD_NAME (t
, i
);
3168 if (!strncmp (name
, vptr_name
, sizeof (vptr_name
) - 2)
3169 && is_cplus_marker (name
[sizeof (vptr_name
) - 2]))
3171 TYPE_VPTR_FIELDNO (type
) = i
;
3175 /* Virtual function table field not found. */
3176 complaint (&symfile_complaints
,
3177 _("virtual function table pointer not found when defining class `%s'"),
3183 TYPE_VPTR_FIELDNO (type
) = TYPE_VPTR_FIELDNO (t
);
3194 attach_fn_fields_to_type (struct field_info
*fip
, struct type
*type
)
3198 for (n
= TYPE_NFN_FIELDS (type
);
3199 fip
->fnlist
!= NULL
;
3200 fip
->fnlist
= fip
->fnlist
->next
)
3202 --n
; /* Circumvent Sun3 compiler bug */
3203 TYPE_FN_FIELDLISTS (type
)[n
] = fip
->fnlist
->fn_fieldlist
;
3208 /* Create the vector of fields, and record how big it is.
3209 We need this info to record proper virtual function table information
3210 for this class's virtual functions. */
3213 attach_fields_to_type (struct field_info
*fip
, struct type
*type
,
3214 struct objfile
*objfile
)
3217 int non_public_fields
= 0;
3218 struct nextfield
*scan
;
3220 /* Count up the number of fields that we have, as well as taking note of
3221 whether or not there are any non-public fields, which requires us to
3222 allocate and build the private_field_bits and protected_field_bits
3225 for (scan
= fip
->list
; scan
!= NULL
; scan
= scan
->next
)
3228 if (scan
->visibility
!= VISIBILITY_PUBLIC
)
3230 non_public_fields
++;
3234 /* Now we know how many fields there are, and whether or not there are any
3235 non-public fields. Record the field count, allocate space for the
3236 array of fields, and create blank visibility bitfields if necessary. */
3238 TYPE_NFIELDS (type
) = nfields
;
3239 TYPE_FIELDS (type
) = (struct field
*)
3240 TYPE_ALLOC (type
, sizeof (struct field
) * nfields
);
3241 memset (TYPE_FIELDS (type
), 0, sizeof (struct field
) * nfields
);
3243 if (non_public_fields
)
3245 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
3247 TYPE_FIELD_PRIVATE_BITS (type
) =
3248 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
3249 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type
), nfields
);
3251 TYPE_FIELD_PROTECTED_BITS (type
) =
3252 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
3253 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type
), nfields
);
3255 TYPE_FIELD_IGNORE_BITS (type
) =
3256 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
3257 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type
), nfields
);
3260 /* Copy the saved-up fields into the field vector. Start from the head
3261 of the list, adding to the tail of the field array, so that they end
3262 up in the same order in the array in which they were added to the list. */
3264 while (nfields
-- > 0)
3266 TYPE_FIELD (type
, nfields
) = fip
->list
->field
;
3267 switch (fip
->list
->visibility
)
3269 case VISIBILITY_PRIVATE
:
3270 SET_TYPE_FIELD_PRIVATE (type
, nfields
);
3273 case VISIBILITY_PROTECTED
:
3274 SET_TYPE_FIELD_PROTECTED (type
, nfields
);
3277 case VISIBILITY_IGNORE
:
3278 SET_TYPE_FIELD_IGNORE (type
, nfields
);
3281 case VISIBILITY_PUBLIC
:
3285 /* Unknown visibility. Complain and treat it as public. */
3287 complaint (&symfile_complaints
, _("Unknown visibility `%c' for field"),
3288 fip
->list
->visibility
);
3292 fip
->list
= fip
->list
->next
;
3298 /* Complain that the compiler has emitted more than one definition for the
3299 structure type TYPE. */
3301 complain_about_struct_wipeout (struct type
*type
)
3306 if (TYPE_TAG_NAME (type
))
3308 name
= TYPE_TAG_NAME (type
);
3309 switch (TYPE_CODE (type
))
3311 case TYPE_CODE_STRUCT
: kind
= "struct "; break;
3312 case TYPE_CODE_UNION
: kind
= "union "; break;
3313 case TYPE_CODE_ENUM
: kind
= "enum "; break;
3317 else if (TYPE_NAME (type
))
3319 name
= TYPE_NAME (type
);
3328 complaint (&symfile_complaints
,
3329 _("struct/union type gets multiply defined: %s%s"), kind
, name
);
3333 /* Read the description of a structure (or union type) and return an object
3334 describing the type.
3336 PP points to a character pointer that points to the next unconsumed token
3337 in the the stabs string. For example, given stabs "A:T4=s4a:1,0,32;;",
3338 *PP will point to "4a:1,0,32;;".
3340 TYPE points to an incomplete type that needs to be filled in.
3342 OBJFILE points to the current objfile from which the stabs information is
3343 being read. (Note that it is redundant in that TYPE also contains a pointer
3344 to this same objfile, so it might be a good idea to eliminate it. FIXME).
3347 static struct type
*
3348 read_struct_type (char **pp
, struct type
*type
, enum type_code type_code
,
3349 struct objfile
*objfile
)
3351 struct cleanup
*back_to
;
3352 struct field_info fi
;
3357 /* When describing struct/union/class types in stabs, G++ always drops
3358 all qualifications from the name. So if you've got:
3359 struct A { ... struct B { ... }; ... };
3360 then G++ will emit stabs for `struct A::B' that call it simply
3361 `struct B'. Obviously, if you've got a real top-level definition for
3362 `struct B', or other nested definitions, this is going to cause
3365 Obviously, GDB can't fix this by itself, but it can at least avoid
3366 scribbling on existing structure type objects when new definitions
3368 if (! (TYPE_CODE (type
) == TYPE_CODE_UNDEF
3369 || TYPE_STUB (type
)))
3371 complain_about_struct_wipeout (type
);
3373 /* It's probably best to return the type unchanged. */
3377 back_to
= make_cleanup (null_cleanup
, 0);
3379 INIT_CPLUS_SPECIFIC (type
);
3380 TYPE_CODE (type
) = type_code
;
3381 TYPE_STUB (type
) = 0;
3383 /* First comes the total size in bytes. */
3387 TYPE_LENGTH (type
) = read_huge_number (pp
, 0, &nbits
, 0);
3389 return error_type (pp
, objfile
);
3392 /* Now read the baseclasses, if any, read the regular C struct or C++
3393 class member fields, attach the fields to the type, read the C++
3394 member functions, attach them to the type, and then read any tilde
3395 field (baseclass specifier for the class holding the main vtable). */
3397 if (!read_baseclasses (&fi
, pp
, type
, objfile
)
3398 || !read_struct_fields (&fi
, pp
, type
, objfile
)
3399 || !attach_fields_to_type (&fi
, type
, objfile
)
3400 || !read_member_functions (&fi
, pp
, type
, objfile
)
3401 || !attach_fn_fields_to_type (&fi
, type
)
3402 || !read_tilde_fields (&fi
, pp
, type
, objfile
))
3404 type
= error_type (pp
, objfile
);
3407 do_cleanups (back_to
);
3411 /* Read a definition of an array type,
3412 and create and return a suitable type object.
3413 Also creates a range type which represents the bounds of that
3416 static struct type
*
3417 read_array_type (char **pp
, struct type
*type
,
3418 struct objfile
*objfile
)
3420 struct type
*index_type
, *element_type
, *range_type
;
3425 /* Format of an array type:
3426 "ar<index type>;lower;upper;<array_contents_type>".
3427 OS9000: "arlower,upper;<array_contents_type>".
3429 Fortran adjustable arrays use Adigits or Tdigits for lower or upper;
3430 for these, produce a type like float[][]. */
3433 index_type
= read_type (pp
, objfile
);
3435 /* Improper format of array type decl. */
3436 return error_type (pp
, objfile
);
3440 if (!(**pp
>= '0' && **pp
<= '9') && **pp
!= '-')
3445 lower
= read_huge_number (pp
, ';', &nbits
, 0);
3448 return error_type (pp
, objfile
);
3450 if (!(**pp
>= '0' && **pp
<= '9') && **pp
!= '-')
3455 upper
= read_huge_number (pp
, ';', &nbits
, 0);
3457 return error_type (pp
, objfile
);
3459 element_type
= read_type (pp
, objfile
);
3468 create_range_type ((struct type
*) NULL
, index_type
, lower
, upper
);
3469 type
= create_array_type (type
, element_type
, range_type
);
3475 /* Read a definition of an enumeration type,
3476 and create and return a suitable type object.
3477 Also defines the symbols that represent the values of the type. */
3479 static struct type
*
3480 read_enum_type (char **pp
, struct type
*type
,
3481 struct objfile
*objfile
)
3483 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
3489 struct pending
**symlist
;
3490 struct pending
*osyms
, *syms
;
3493 int unsigned_enum
= 1;
3496 /* FIXME! The stabs produced by Sun CC merrily define things that ought
3497 to be file-scope, between N_FN entries, using N_LSYM. What's a mother
3498 to do? For now, force all enum values to file scope. */
3499 if (within_function
)
3500 symlist
= &local_symbols
;
3503 symlist
= &file_symbols
;
3505 o_nsyms
= osyms
? osyms
->nsyms
: 0;
3507 /* The aix4 compiler emits an extra field before the enum members;
3508 my guess is it's a type of some sort. Just ignore it. */
3511 /* Skip over the type. */
3515 /* Skip over the colon. */
3519 /* Read the value-names and their values.
3520 The input syntax is NAME:VALUE,NAME:VALUE, and so on.
3521 A semicolon or comma instead of a NAME means the end. */
3522 while (**pp
&& **pp
!= ';' && **pp
!= ',')
3524 STABS_CONTINUE (pp
, objfile
);
3528 name
= obsavestring (*pp
, p
- *pp
, &objfile
->objfile_obstack
);
3530 n
= read_huge_number (pp
, ',', &nbits
, 0);
3532 return error_type (pp
, objfile
);
3534 sym
= (struct symbol
*)
3535 obstack_alloc (&objfile
->objfile_obstack
, sizeof (struct symbol
));
3536 memset (sym
, 0, sizeof (struct symbol
));
3537 SYMBOL_SET_LINKAGE_NAME (sym
, name
);
3538 SYMBOL_LANGUAGE (sym
) = current_subfile
->language
;
3539 SYMBOL_CLASS (sym
) = LOC_CONST
;
3540 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
3541 SYMBOL_VALUE (sym
) = n
;
3544 add_symbol_to_list (sym
, symlist
);
3549 (*pp
)++; /* Skip the semicolon. */
3551 /* Now fill in the fields of the type-structure. */
3553 TYPE_LENGTH (type
) = gdbarch_int_bit (gdbarch
) / HOST_CHAR_BIT
;
3554 TYPE_CODE (type
) = TYPE_CODE_ENUM
;
3555 TYPE_STUB (type
) = 0;
3557 TYPE_UNSIGNED (type
) = 1;
3558 TYPE_NFIELDS (type
) = nsyms
;
3559 TYPE_FIELDS (type
) = (struct field
*)
3560 TYPE_ALLOC (type
, sizeof (struct field
) * nsyms
);
3561 memset (TYPE_FIELDS (type
), 0, sizeof (struct field
) * nsyms
);
3563 /* Find the symbols for the values and put them into the type.
3564 The symbols can be found in the symlist that we put them on
3565 to cause them to be defined. osyms contains the old value
3566 of that symlist; everything up to there was defined by us. */
3567 /* Note that we preserve the order of the enum constants, so
3568 that in something like "enum {FOO, LAST_THING=FOO}" we print
3569 FOO, not LAST_THING. */
3571 for (syms
= *symlist
, n
= nsyms
- 1; syms
; syms
= syms
->next
)
3573 int last
= syms
== osyms
? o_nsyms
: 0;
3574 int j
= syms
->nsyms
;
3575 for (; --j
>= last
; --n
)
3577 struct symbol
*xsym
= syms
->symbol
[j
];
3578 SYMBOL_TYPE (xsym
) = type
;
3579 TYPE_FIELD_NAME (type
, n
) = SYMBOL_LINKAGE_NAME (xsym
);
3580 TYPE_FIELD_BITPOS (type
, n
) = SYMBOL_VALUE (xsym
);
3581 TYPE_FIELD_BITSIZE (type
, n
) = 0;
3590 /* Sun's ACC uses a somewhat saner method for specifying the builtin
3591 typedefs in every file (for int, long, etc):
3593 type = b <signed> <width> <format type>; <offset>; <nbits>
3595 optional format type = c or b for char or boolean.
3596 offset = offset from high order bit to start bit of type.
3597 width is # bytes in object of this type, nbits is # bits in type.
3599 The width/offset stuff appears to be for small objects stored in
3600 larger ones (e.g. `shorts' in `int' registers). We ignore it for now,
3603 static struct type
*
3604 read_sun_builtin_type (char **pp
, int typenums
[2], struct objfile
*objfile
)
3609 enum type_code code
= TYPE_CODE_INT
;
3620 return error_type (pp
, objfile
);
3624 /* For some odd reason, all forms of char put a c here. This is strange
3625 because no other type has this honor. We can safely ignore this because
3626 we actually determine 'char'acterness by the number of bits specified in
3628 Boolean forms, e.g Fortran logical*X, put a b here. */
3632 else if (**pp
== 'b')
3634 code
= TYPE_CODE_BOOL
;
3638 /* The first number appears to be the number of bytes occupied
3639 by this type, except that unsigned short is 4 instead of 2.
3640 Since this information is redundant with the third number,
3641 we will ignore it. */
3642 read_huge_number (pp
, ';', &nbits
, 0);
3644 return error_type (pp
, objfile
);
3646 /* The second number is always 0, so ignore it too. */
3647 read_huge_number (pp
, ';', &nbits
, 0);
3649 return error_type (pp
, objfile
);
3651 /* The third number is the number of bits for this type. */
3652 type_bits
= read_huge_number (pp
, 0, &nbits
, 0);
3654 return error_type (pp
, objfile
);
3655 /* The type *should* end with a semicolon. If it are embedded
3656 in a larger type the semicolon may be the only way to know where
3657 the type ends. If this type is at the end of the stabstring we
3658 can deal with the omitted semicolon (but we don't have to like
3659 it). Don't bother to complain(), Sun's compiler omits the semicolon
3665 return init_type (TYPE_CODE_VOID
, 1,
3666 signed_type
? 0 : TYPE_FLAG_UNSIGNED
, (char *) NULL
,
3669 return init_type (code
,
3670 type_bits
/ TARGET_CHAR_BIT
,
3671 signed_type
? 0 : TYPE_FLAG_UNSIGNED
, (char *) NULL
,
3675 static struct type
*
3676 read_sun_floating_type (char **pp
, int typenums
[2], struct objfile
*objfile
)
3681 struct type
*rettype
;
3683 /* The first number has more details about the type, for example
3685 details
= read_huge_number (pp
, ';', &nbits
, 0);
3687 return error_type (pp
, objfile
);
3689 /* The second number is the number of bytes occupied by this type */
3690 nbytes
= read_huge_number (pp
, ';', &nbits
, 0);
3692 return error_type (pp
, objfile
);
3694 if (details
== NF_COMPLEX
|| details
== NF_COMPLEX16
3695 || details
== NF_COMPLEX32
)
3697 rettype
= init_type (TYPE_CODE_COMPLEX
, nbytes
, 0, NULL
, objfile
);
3698 TYPE_TARGET_TYPE (rettype
)
3699 = init_type (TYPE_CODE_FLT
, nbytes
/ 2, 0, NULL
, objfile
);
3703 return init_type (TYPE_CODE_FLT
, nbytes
, 0, NULL
, objfile
);
3706 /* Read a number from the string pointed to by *PP.
3707 The value of *PP is advanced over the number.
3708 If END is nonzero, the character that ends the
3709 number must match END, or an error happens;
3710 and that character is skipped if it does match.
3711 If END is zero, *PP is left pointing to that character.
3713 If TWOS_COMPLEMENT_BITS is set to a strictly positive value and if
3714 the number is represented in an octal representation, assume that
3715 it is represented in a 2's complement representation with a size of
3716 TWOS_COMPLEMENT_BITS.
3718 If the number fits in a long, set *BITS to 0 and return the value.
3719 If not, set *BITS to be the number of bits in the number and return 0.
3721 If encounter garbage, set *BITS to -1 and return 0. */
3724 read_huge_number (char **pp
, int end
, int *bits
, int twos_complement_bits
)
3735 int twos_complement_representation
= 0;
3743 /* Leading zero means octal. GCC uses this to output values larger
3744 than an int (because that would be hard in decimal). */
3751 /* Skip extra zeros. */
3755 if (sign
> 0 && radix
== 8 && twos_complement_bits
> 0)
3757 /* Octal, possibly signed. Check if we have enough chars for a
3762 while ((c
= *p1
) >= '0' && c
< '8')
3766 if (len
> twos_complement_bits
/ 3
3767 || (twos_complement_bits
% 3 == 0 && len
== twos_complement_bits
/ 3))
3769 /* Ok, we have enough characters for a signed value, check
3770 for signness by testing if the sign bit is set. */
3771 sign_bit
= (twos_complement_bits
% 3 + 2) % 3;
3773 if (c
& (1 << sign_bit
))
3775 /* Definitely signed. */
3776 twos_complement_representation
= 1;
3782 upper_limit
= LONG_MAX
/ radix
;
3784 while ((c
= *p
++) >= '0' && c
< ('0' + radix
))
3786 if (n
<= upper_limit
)
3788 if (twos_complement_representation
)
3790 /* Octal, signed, twos complement representation. In
3791 this case, n is the corresponding absolute value. */
3794 long sn
= c
- '0' - ((2 * (c
- '0')) | (2 << sign_bit
));
3805 /* unsigned representation */
3807 n
+= c
- '0'; /* FIXME this overflows anyway */
3813 /* This depends on large values being output in octal, which is
3820 /* Ignore leading zeroes. */
3824 else if (c
== '2' || c
== '3')
3845 if (radix
== 8 && twos_complement_bits
> 0 && nbits
> twos_complement_bits
)
3847 /* We were supposed to parse a number with maximum
3848 TWOS_COMPLEMENT_BITS bits, but something went wrong. */
3859 /* Large decimal constants are an error (because it is hard to
3860 count how many bits are in them). */
3866 /* -0x7f is the same as 0x80. So deal with it by adding one to
3867 the number of bits. Two's complement represention octals
3868 can't have a '-' in front. */
3869 if (sign
== -1 && !twos_complement_representation
)
3880 /* It's *BITS which has the interesting information. */
3884 static struct type
*
3885 read_range_type (char **pp
, int typenums
[2], int type_size
,
3886 struct objfile
*objfile
)
3888 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
3889 char *orig_pp
= *pp
;
3894 struct type
*result_type
;
3895 struct type
*index_type
= NULL
;
3897 /* First comes a type we are a subrange of.
3898 In C it is usually 0, 1 or the type being defined. */
3899 if (read_type_number (pp
, rangenums
) != 0)
3900 return error_type (pp
, objfile
);
3901 self_subrange
= (rangenums
[0] == typenums
[0] &&
3902 rangenums
[1] == typenums
[1]);
3907 index_type
= read_type (pp
, objfile
);
3910 /* A semicolon should now follow; skip it. */
3914 /* The remaining two operands are usually lower and upper bounds
3915 of the range. But in some special cases they mean something else. */
3916 n2
= read_huge_number (pp
, ';', &n2bits
, type_size
);
3917 n3
= read_huge_number (pp
, ';', &n3bits
, type_size
);
3919 if (n2bits
== -1 || n3bits
== -1)
3920 return error_type (pp
, objfile
);
3923 goto handle_true_range
;
3925 /* If limits are huge, must be large integral type. */
3926 if (n2bits
!= 0 || n3bits
!= 0)
3928 char got_signed
= 0;
3929 char got_unsigned
= 0;
3930 /* Number of bits in the type. */
3933 /* If a type size attribute has been specified, the bounds of
3934 the range should fit in this size. If the lower bounds needs
3935 more bits than the upper bound, then the type is signed. */
3936 if (n2bits
<= type_size
&& n3bits
<= type_size
)
3938 if (n2bits
== type_size
&& n2bits
> n3bits
)
3944 /* Range from 0 to <large number> is an unsigned large integral type. */
3945 else if ((n2bits
== 0 && n2
== 0) && n3bits
!= 0)
3950 /* Range from <large number> to <large number>-1 is a large signed
3951 integral type. Take care of the case where <large number> doesn't
3952 fit in a long but <large number>-1 does. */
3953 else if ((n2bits
!= 0 && n3bits
!= 0 && n2bits
== n3bits
+ 1)
3954 || (n2bits
!= 0 && n3bits
== 0
3955 && (n2bits
== sizeof (long) * HOST_CHAR_BIT
)
3962 if (got_signed
|| got_unsigned
)
3964 return init_type (TYPE_CODE_INT
, nbits
/ TARGET_CHAR_BIT
,
3965 got_unsigned
? TYPE_FLAG_UNSIGNED
: 0, NULL
,
3969 return error_type (pp
, objfile
);
3972 /* A type defined as a subrange of itself, with bounds both 0, is void. */
3973 if (self_subrange
&& n2
== 0 && n3
== 0)
3974 return init_type (TYPE_CODE_VOID
, 1, 0, NULL
, objfile
);
3976 /* If n3 is zero and n2 is positive, we want a floating type, and n2
3977 is the width in bytes.
3979 Fortran programs appear to use this for complex types also. To
3980 distinguish between floats and complex, g77 (and others?) seem
3981 to use self-subranges for the complexes, and subranges of int for
3984 Also note that for complexes, g77 sets n2 to the size of one of
3985 the member floats, not the whole complex beast. My guess is that
3986 this was to work well with pre-COMPLEX versions of gdb. */
3988 if (n3
== 0 && n2
> 0)
3990 struct type
*float_type
3991 = init_type (TYPE_CODE_FLT
, n2
, 0, NULL
, objfile
);
3995 struct type
*complex_type
=
3996 init_type (TYPE_CODE_COMPLEX
, 2 * n2
, 0, NULL
, objfile
);
3997 TYPE_TARGET_TYPE (complex_type
) = float_type
;
3998 return complex_type
;
4004 /* If the upper bound is -1, it must really be an unsigned integral. */
4006 else if (n2
== 0 && n3
== -1)
4008 int bits
= type_size
;
4011 /* We don't know its size. It is unsigned int or unsigned
4012 long. GCC 2.3.3 uses this for long long too, but that is
4013 just a GDB 3.5 compatibility hack. */
4014 bits
= gdbarch_int_bit (gdbarch
);
4017 return init_type (TYPE_CODE_INT
, bits
/ TARGET_CHAR_BIT
,
4018 TYPE_FLAG_UNSIGNED
, NULL
, objfile
);
4021 /* Special case: char is defined (Who knows why) as a subrange of
4022 itself with range 0-127. */
4023 else if (self_subrange
&& n2
== 0 && n3
== 127)
4024 return init_type (TYPE_CODE_INT
, 1, TYPE_FLAG_NOSIGN
, NULL
, objfile
);
4026 /* We used to do this only for subrange of self or subrange of int. */
4029 /* -1 is used for the upper bound of (4 byte) "unsigned int" and
4030 "unsigned long", and we already checked for that,
4031 so don't need to test for it here. */
4034 /* n3 actually gives the size. */
4035 return init_type (TYPE_CODE_INT
, -n3
, TYPE_FLAG_UNSIGNED
,
4038 /* Is n3 == 2**(8n)-1 for some integer n? Then it's an
4039 unsigned n-byte integer. But do require n to be a power of
4040 two; we don't want 3- and 5-byte integers flying around. */
4046 for (bytes
= 0; (bits
& 0xff) == 0xff; bytes
++)
4049 && ((bytes
- 1) & bytes
) == 0) /* "bytes is a power of two" */
4050 return init_type (TYPE_CODE_INT
, bytes
, TYPE_FLAG_UNSIGNED
, NULL
,
4054 /* I think this is for Convex "long long". Since I don't know whether
4055 Convex sets self_subrange, I also accept that particular size regardless
4056 of self_subrange. */
4057 else if (n3
== 0 && n2
< 0
4059 || n2
== -gdbarch_long_long_bit
4060 (gdbarch
) / TARGET_CHAR_BIT
))
4061 return init_type (TYPE_CODE_INT
, -n2
, 0, NULL
, objfile
);
4062 else if (n2
== -n3
- 1)
4065 return init_type (TYPE_CODE_INT
, 1, 0, NULL
, objfile
);
4067 return init_type (TYPE_CODE_INT
, 2, 0, NULL
, objfile
);
4068 if (n3
== 0x7fffffff)
4069 return init_type (TYPE_CODE_INT
, 4, 0, NULL
, objfile
);
4072 /* We have a real range type on our hands. Allocate space and
4073 return a real pointer. */
4077 index_type
= objfile_type (objfile
)->builtin_int
;
4079 index_type
= *dbx_lookup_type (rangenums
, objfile
);
4080 if (index_type
== NULL
)
4082 /* Does this actually ever happen? Is that why we are worrying
4083 about dealing with it rather than just calling error_type? */
4085 complaint (&symfile_complaints
,
4086 _("base type %d of range type is not defined"), rangenums
[1]);
4088 index_type
= objfile_type (objfile
)->builtin_int
;
4091 result_type
= create_range_type ((struct type
*) NULL
, index_type
, n2
, n3
);
4092 return (result_type
);
4095 /* Read in an argument list. This is a list of types, separated by commas
4096 and terminated with END. Return the list of types read in, or NULL
4097 if there is an error. */
4099 static struct field
*
4100 read_args (char **pp
, int end
, struct objfile
*objfile
, int *nargsp
,
4103 /* FIXME! Remove this arbitrary limit! */
4104 struct type
*types
[1024]; /* allow for fns of 1023 parameters */
4111 /* Invalid argument list: no ','. */
4114 STABS_CONTINUE (pp
, objfile
);
4115 types
[n
++] = read_type (pp
, objfile
);
4117 (*pp
)++; /* get past `end' (the ':' character) */
4119 if (TYPE_CODE (types
[n
- 1]) != TYPE_CODE_VOID
)
4127 rval
= (struct field
*) xmalloc (n
* sizeof (struct field
));
4128 memset (rval
, 0, n
* sizeof (struct field
));
4129 for (i
= 0; i
< n
; i
++)
4130 rval
[i
].type
= types
[i
];
4135 /* Common block handling. */
4137 /* List of symbols declared since the last BCOMM. This list is a tail
4138 of local_symbols. When ECOMM is seen, the symbols on the list
4139 are noted so their proper addresses can be filled in later,
4140 using the common block base address gotten from the assembler
4143 static struct pending
*common_block
;
4144 static int common_block_i
;
4146 /* Name of the current common block. We get it from the BCOMM instead of the
4147 ECOMM to match IBM documentation (even though IBM puts the name both places
4148 like everyone else). */
4149 static char *common_block_name
;
4151 /* Process a N_BCOMM symbol. The storage for NAME is not guaranteed
4152 to remain after this function returns. */
4155 common_block_start (char *name
, struct objfile
*objfile
)
4157 if (common_block_name
!= NULL
)
4159 complaint (&symfile_complaints
,
4160 _("Invalid symbol data: common block within common block"));
4162 common_block
= local_symbols
;
4163 common_block_i
= local_symbols
? local_symbols
->nsyms
: 0;
4164 common_block_name
= obsavestring (name
, strlen (name
),
4165 &objfile
->objfile_obstack
);
4168 /* Process a N_ECOMM symbol. */
4171 common_block_end (struct objfile
*objfile
)
4173 /* Symbols declared since the BCOMM are to have the common block
4174 start address added in when we know it. common_block and
4175 common_block_i point to the first symbol after the BCOMM in
4176 the local_symbols list; copy the list and hang it off the
4177 symbol for the common block name for later fixup. */
4180 struct pending
*new = 0;
4181 struct pending
*next
;
4184 if (common_block_name
== NULL
)
4186 complaint (&symfile_complaints
, _("ECOMM symbol unmatched by BCOMM"));
4190 sym
= (struct symbol
*)
4191 obstack_alloc (&objfile
->objfile_obstack
, sizeof (struct symbol
));
4192 memset (sym
, 0, sizeof (struct symbol
));
4193 /* Note: common_block_name already saved on objfile_obstack */
4194 SYMBOL_SET_LINKAGE_NAME (sym
, common_block_name
);
4195 SYMBOL_CLASS (sym
) = LOC_BLOCK
;
4197 /* Now we copy all the symbols which have been defined since the BCOMM. */
4199 /* Copy all the struct pendings before common_block. */
4200 for (next
= local_symbols
;
4201 next
!= NULL
&& next
!= common_block
;
4204 for (j
= 0; j
< next
->nsyms
; j
++)
4205 add_symbol_to_list (next
->symbol
[j
], &new);
4208 /* Copy however much of COMMON_BLOCK we need. If COMMON_BLOCK is
4209 NULL, it means copy all the local symbols (which we already did
4212 if (common_block
!= NULL
)
4213 for (j
= common_block_i
; j
< common_block
->nsyms
; j
++)
4214 add_symbol_to_list (common_block
->symbol
[j
], &new);
4216 SYMBOL_TYPE (sym
) = (struct type
*) new;
4218 /* Should we be putting local_symbols back to what it was?
4221 i
= hashname (SYMBOL_LINKAGE_NAME (sym
));
4222 SYMBOL_VALUE_CHAIN (sym
) = global_sym_chain
[i
];
4223 global_sym_chain
[i
] = sym
;
4224 common_block_name
= NULL
;
4227 /* Add a common block's start address to the offset of each symbol
4228 declared to be in it (by being between a BCOMM/ECOMM pair that uses
4229 the common block name). */
4232 fix_common_block (struct symbol
*sym
, int valu
)
4234 struct pending
*next
= (struct pending
*) SYMBOL_TYPE (sym
);
4235 for (; next
; next
= next
->next
)
4238 for (j
= next
->nsyms
- 1; j
>= 0; j
--)
4239 SYMBOL_VALUE_ADDRESS (next
->symbol
[j
]) += valu
;
4245 /* Add {TYPE, TYPENUMS} to the NONAME_UNDEFS vector.
4246 See add_undefined_type for more details. */
4249 add_undefined_type_noname (struct type
*type
, int typenums
[2])
4253 nat
.typenums
[0] = typenums
[0];
4254 nat
.typenums
[1] = typenums
[1];
4257 if (noname_undefs_length
== noname_undefs_allocated
)
4259 noname_undefs_allocated
*= 2;
4260 noname_undefs
= (struct nat
*)
4261 xrealloc ((char *) noname_undefs
,
4262 noname_undefs_allocated
* sizeof (struct nat
));
4264 noname_undefs
[noname_undefs_length
++] = nat
;
4267 /* Add TYPE to the UNDEF_TYPES vector.
4268 See add_undefined_type for more details. */
4271 add_undefined_type_1 (struct type
*type
)
4273 if (undef_types_length
== undef_types_allocated
)
4275 undef_types_allocated
*= 2;
4276 undef_types
= (struct type
**)
4277 xrealloc ((char *) undef_types
,
4278 undef_types_allocated
* sizeof (struct type
*));
4280 undef_types
[undef_types_length
++] = type
;
4283 /* What about types defined as forward references inside of a small lexical
4285 /* Add a type to the list of undefined types to be checked through
4286 once this file has been read in.
4288 In practice, we actually maintain two such lists: The first list
4289 (UNDEF_TYPES) is used for types whose name has been provided, and
4290 concerns forward references (eg 'xs' or 'xu' forward references);
4291 the second list (NONAME_UNDEFS) is used for types whose name is
4292 unknown at creation time, because they were referenced through
4293 their type number before the actual type was declared.
4294 This function actually adds the given type to the proper list. */
4297 add_undefined_type (struct type
*type
, int typenums
[2])
4299 if (TYPE_TAG_NAME (type
) == NULL
)
4300 add_undefined_type_noname (type
, typenums
);
4302 add_undefined_type_1 (type
);
4305 /* Try to fix all undefined types pushed on the UNDEF_TYPES vector. */
4308 cleanup_undefined_types_noname (struct objfile
*objfile
)
4312 for (i
= 0; i
< noname_undefs_length
; i
++)
4314 struct nat nat
= noname_undefs
[i
];
4317 type
= dbx_lookup_type (nat
.typenums
, objfile
);
4318 if (nat
.type
!= *type
&& TYPE_CODE (*type
) != TYPE_CODE_UNDEF
)
4320 /* The instance flags of the undefined type are still unset,
4321 and needs to be copied over from the reference type.
4322 Since replace_type expects them to be identical, we need
4323 to set these flags manually before hand. */
4324 TYPE_INSTANCE_FLAGS (nat
.type
) = TYPE_INSTANCE_FLAGS (*type
);
4325 replace_type (nat
.type
, *type
);
4329 noname_undefs_length
= 0;
4332 /* Go through each undefined type, see if it's still undefined, and fix it
4333 up if possible. We have two kinds of undefined types:
4335 TYPE_CODE_ARRAY: Array whose target type wasn't defined yet.
4336 Fix: update array length using the element bounds
4337 and the target type's length.
4338 TYPE_CODE_STRUCT, TYPE_CODE_UNION: Structure whose fields were not
4339 yet defined at the time a pointer to it was made.
4340 Fix: Do a full lookup on the struct/union tag. */
4343 cleanup_undefined_types_1 (void)
4347 /* Iterate over every undefined type, and look for a symbol whose type
4348 matches our undefined type. The symbol matches if:
4349 1. It is a typedef in the STRUCT domain;
4350 2. It has the same name, and same type code;
4351 3. The instance flags are identical.
4353 It is important to check the instance flags, because we have seen
4354 examples where the debug info contained definitions such as:
4356 "foo_t:t30=B31=xefoo_t:"
4358 In this case, we have created an undefined type named "foo_t" whose
4359 instance flags is null (when processing "xefoo_t"), and then created
4360 another type with the same name, but with different instance flags
4361 ('B' means volatile). I think that the definition above is wrong,
4362 since the same type cannot be volatile and non-volatile at the same
4363 time, but we need to be able to cope with it when it happens. The
4364 approach taken here is to treat these two types as different. */
4366 for (type
= undef_types
; type
< undef_types
+ undef_types_length
; type
++)
4368 switch (TYPE_CODE (*type
))
4371 case TYPE_CODE_STRUCT
:
4372 case TYPE_CODE_UNION
:
4373 case TYPE_CODE_ENUM
:
4375 /* Check if it has been defined since. Need to do this here
4376 as well as in check_typedef to deal with the (legitimate in
4377 C though not C++) case of several types with the same name
4378 in different source files. */
4379 if (TYPE_STUB (*type
))
4381 struct pending
*ppt
;
4383 /* Name of the type, without "struct" or "union" */
4384 char *typename
= TYPE_TAG_NAME (*type
);
4386 if (typename
== NULL
)
4388 complaint (&symfile_complaints
, _("need a type name"));
4391 for (ppt
= file_symbols
; ppt
; ppt
= ppt
->next
)
4393 for (i
= 0; i
< ppt
->nsyms
; i
++)
4395 struct symbol
*sym
= ppt
->symbol
[i
];
4397 if (SYMBOL_CLASS (sym
) == LOC_TYPEDEF
4398 && SYMBOL_DOMAIN (sym
) == STRUCT_DOMAIN
4399 && (TYPE_CODE (SYMBOL_TYPE (sym
)) ==
4401 && (TYPE_INSTANCE_FLAGS (*type
) ==
4402 TYPE_INSTANCE_FLAGS (SYMBOL_TYPE (sym
)))
4403 && strcmp (SYMBOL_LINKAGE_NAME (sym
),
4405 replace_type (*type
, SYMBOL_TYPE (sym
));
4414 complaint (&symfile_complaints
,
4415 _("forward-referenced types left unresolved, "
4423 undef_types_length
= 0;
4426 /* Try to fix all the undefined types we ecountered while processing
4430 cleanup_undefined_types (struct objfile
*objfile
)
4432 cleanup_undefined_types_1 ();
4433 cleanup_undefined_types_noname (objfile
);
4436 /* Scan through all of the global symbols defined in the object file,
4437 assigning values to the debugging symbols that need to be assigned
4438 to. Get these symbols from the minimal symbol table. */
4441 scan_file_globals (struct objfile
*objfile
)
4444 struct minimal_symbol
*msymbol
;
4445 struct symbol
*sym
, *prev
;
4446 struct objfile
*resolve_objfile
;
4448 /* SVR4 based linkers copy referenced global symbols from shared
4449 libraries to the main executable.
4450 If we are scanning the symbols for a shared library, try to resolve
4451 them from the minimal symbols of the main executable first. */
4453 if (symfile_objfile
&& objfile
!= symfile_objfile
)
4454 resolve_objfile
= symfile_objfile
;
4456 resolve_objfile
= objfile
;
4460 /* Avoid expensive loop through all minimal symbols if there are
4461 no unresolved symbols. */
4462 for (hash
= 0; hash
< HASHSIZE
; hash
++)
4464 if (global_sym_chain
[hash
])
4467 if (hash
>= HASHSIZE
)
4470 ALL_OBJFILE_MSYMBOLS (resolve_objfile
, msymbol
)
4474 /* Skip static symbols. */
4475 switch (MSYMBOL_TYPE (msymbol
))
4487 /* Get the hash index and check all the symbols
4488 under that hash index. */
4490 hash
= hashname (SYMBOL_LINKAGE_NAME (msymbol
));
4492 for (sym
= global_sym_chain
[hash
]; sym
;)
4494 if (strcmp (SYMBOL_LINKAGE_NAME (msymbol
),
4495 SYMBOL_LINKAGE_NAME (sym
)) == 0)
4497 /* Splice this symbol out of the hash chain and
4498 assign the value we have to it. */
4501 SYMBOL_VALUE_CHAIN (prev
) = SYMBOL_VALUE_CHAIN (sym
);
4505 global_sym_chain
[hash
] = SYMBOL_VALUE_CHAIN (sym
);
4508 /* Check to see whether we need to fix up a common block. */
4509 /* Note: this code might be executed several times for
4510 the same symbol if there are multiple references. */
4513 if (SYMBOL_CLASS (sym
) == LOC_BLOCK
)
4515 fix_common_block (sym
,
4516 SYMBOL_VALUE_ADDRESS (msymbol
));
4520 SYMBOL_VALUE_ADDRESS (sym
)
4521 = SYMBOL_VALUE_ADDRESS (msymbol
);
4523 SYMBOL_SECTION (sym
) = SYMBOL_SECTION (msymbol
);
4528 sym
= SYMBOL_VALUE_CHAIN (prev
);
4532 sym
= global_sym_chain
[hash
];
4538 sym
= SYMBOL_VALUE_CHAIN (sym
);
4542 if (resolve_objfile
== objfile
)
4544 resolve_objfile
= objfile
;
4547 /* Change the storage class of any remaining unresolved globals to
4548 LOC_UNRESOLVED and remove them from the chain. */
4549 for (hash
= 0; hash
< HASHSIZE
; hash
++)
4551 sym
= global_sym_chain
[hash
];
4555 sym
= SYMBOL_VALUE_CHAIN (sym
);
4557 /* Change the symbol address from the misleading chain value
4559 SYMBOL_VALUE_ADDRESS (prev
) = 0;
4561 /* Complain about unresolved common block symbols. */
4562 if (SYMBOL_CLASS (prev
) == LOC_STATIC
)
4563 SYMBOL_CLASS (prev
) = LOC_UNRESOLVED
;
4565 complaint (&symfile_complaints
,
4566 _("%s: common block `%s' from global_sym_chain unresolved"),
4567 objfile
->name
, SYMBOL_PRINT_NAME (prev
));
4570 memset (global_sym_chain
, 0, sizeof (global_sym_chain
));
4573 /* Initialize anything that needs initializing when starting to read
4574 a fresh piece of a symbol file, e.g. reading in the stuff corresponding
4578 stabsread_init (void)
4582 /* Initialize anything that needs initializing when a completely new
4583 symbol file is specified (not just adding some symbols from another
4584 file, e.g. a shared library). */
4587 stabsread_new_init (void)
4589 /* Empty the hash table of global syms looking for values. */
4590 memset (global_sym_chain
, 0, sizeof (global_sym_chain
));
4593 /* Initialize anything that needs initializing at the same time as
4594 start_symtab() is called. */
4599 global_stabs
= NULL
; /* AIX COFF */
4600 /* Leave FILENUM of 0 free for builtin types and this file's types. */
4601 n_this_object_header_files
= 1;
4602 type_vector_length
= 0;
4603 type_vector
= (struct type
**) 0;
4605 /* FIXME: If common_block_name is not already NULL, we should complain(). */
4606 common_block_name
= NULL
;
4609 /* Call after end_symtab() */
4616 xfree (type_vector
);
4619 type_vector_length
= 0;
4620 previous_stab_code
= 0;
4624 finish_global_stabs (struct objfile
*objfile
)
4628 patch_block_stabs (global_symbols
, global_stabs
, objfile
);
4629 xfree (global_stabs
);
4630 global_stabs
= NULL
;
4634 /* Find the end of the name, delimited by a ':', but don't match
4635 ObjC symbols which look like -[Foo bar::]:bla. */
4637 find_name_end (char *name
)
4640 if (s
[0] == '-' || *s
== '+')
4642 /* Must be an ObjC method symbol. */
4645 error (_("invalid symbol name \"%s\""), name
);
4647 s
= strchr (s
, ']');
4650 error (_("invalid symbol name \"%s\""), name
);
4652 return strchr (s
, ':');
4656 return strchr (s
, ':');
4660 /* Initializer for this module */
4663 _initialize_stabsread (void)
4665 rs6000_builtin_type_data
= register_objfile_data ();
4667 undef_types_allocated
= 20;
4668 undef_types_length
= 0;
4669 undef_types
= (struct type
**)
4670 xmalloc (undef_types_allocated
* sizeof (struct type
*));
4672 noname_undefs_allocated
= 20;
4673 noname_undefs_length
= 0;
4674 noname_undefs
= (struct nat
*)
4675 xmalloc (noname_undefs_allocated
* sizeof (struct nat
));