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);
120 read_member_functions (struct field_info
*, char **, struct type
*,
124 read_struct_fields (struct field_info
*, char **, struct type
*,
128 read_baseclasses (struct field_info
*, char **, struct type
*,
132 read_tilde_fields (struct field_info
*, char **, struct type
*,
135 static int attach_fn_fields_to_type (struct field_info
*, struct type
*);
137 static int attach_fields_to_type (struct field_info
*, struct type
*,
140 static struct type
*read_struct_type (char **, struct type
*,
144 static struct type
*read_array_type (char **, struct type
*,
147 static struct field
*read_args (char **, int, struct objfile
*, int *, int *);
149 static void add_undefined_type (struct type
*, int[2]);
152 read_cpp_abbrev (struct field_info
*, char **, struct type
*,
155 static char *find_name_end (char *name
);
157 static int process_reference (char **string
);
159 void stabsread_clear_cache (void);
161 static const char vptr_name
[] = "_vptr$";
162 static const char vb_name
[] = "_vb$";
165 invalid_cpp_abbrev_complaint (const char *arg1
)
167 complaint (&symfile_complaints
, _("invalid C++ abbreviation `%s'"), arg1
);
171 reg_value_complaint (int regnum
, int num_regs
, const char *sym
)
173 complaint (&symfile_complaints
,
174 _("register number %d too large (max %d) in symbol %s"),
175 regnum
, num_regs
- 1, sym
);
179 stabs_general_complaint (const char *arg1
)
181 complaint (&symfile_complaints
, "%s", arg1
);
184 /* Make a list of forward references which haven't been defined. */
186 static struct type
**undef_types
;
187 static int undef_types_allocated
;
188 static int undef_types_length
;
189 static struct symbol
*current_symbol
= NULL
;
191 /* Make a list of nameless types that are undefined.
192 This happens when another type is referenced by its number
193 before this type is actually defined. For instance "t(0,1)=k(0,2)"
194 and type (0,2) is defined only later. */
201 static struct nat
*noname_undefs
;
202 static int noname_undefs_allocated
;
203 static int noname_undefs_length
;
205 /* Check for and handle cretinous stabs symbol name continuation! */
206 #define STABS_CONTINUE(pp,objfile) \
208 if (**(pp) == '\\' || (**(pp) == '?' && (*(pp))[1] == '\0')) \
209 *(pp) = next_symbol_text (objfile); \
213 /* Look up a dbx type-number pair. Return the address of the slot
214 where the type for that number-pair is stored.
215 The number-pair is in TYPENUMS.
217 This can be used for finding the type associated with that pair
218 or for associating a new type with the pair. */
220 static struct type
**
221 dbx_lookup_type (int typenums
[2])
223 int filenum
= typenums
[0];
224 int index
= typenums
[1];
227 struct header_file
*f
;
230 if (filenum
== -1) /* -1,-1 is for temporary types. */
233 if (filenum
< 0 || filenum
>= n_this_object_header_files
)
235 complaint (&symfile_complaints
,
236 _("Invalid symbol data: type number (%d,%d) out of range at symtab pos %d."),
237 filenum
, index
, symnum
);
245 /* Caller wants address of address of type. We think
246 that negative (rs6k builtin) types will never appear as
247 "lvalues", (nor should they), so we stuff the real type
248 pointer into a temp, and return its address. If referenced,
249 this will do the right thing. */
250 static struct type
*temp_type
;
252 temp_type
= rs6000_builtin_type (index
);
256 /* Type is defined outside of header files.
257 Find it in this object file's type vector. */
258 if (index
>= type_vector_length
)
260 old_len
= type_vector_length
;
263 type_vector_length
= INITIAL_TYPE_VECTOR_LENGTH
;
264 type_vector
= (struct type
**)
265 xmalloc (type_vector_length
* sizeof (struct type
*));
267 while (index
>= type_vector_length
)
269 type_vector_length
*= 2;
271 type_vector
= (struct type
**)
272 xrealloc ((char *) type_vector
,
273 (type_vector_length
* sizeof (struct type
*)));
274 memset (&type_vector
[old_len
], 0,
275 (type_vector_length
- old_len
) * sizeof (struct type
*));
277 return (&type_vector
[index
]);
281 real_filenum
= this_object_header_files
[filenum
];
283 if (real_filenum
>= N_HEADER_FILES (current_objfile
))
285 static struct type
**temp_type_p
;
287 warning (_("GDB internal error: bad real_filenum"));
290 temp_type_p
= &builtin_type_error
;
294 f
= HEADER_FILES (current_objfile
) + real_filenum
;
296 f_orig_length
= f
->length
;
297 if (index
>= f_orig_length
)
299 while (index
>= f
->length
)
303 f
->vector
= (struct type
**)
304 xrealloc ((char *) f
->vector
, f
->length
* sizeof (struct type
*));
305 memset (&f
->vector
[f_orig_length
], 0,
306 (f
->length
- f_orig_length
) * sizeof (struct type
*));
308 return (&f
->vector
[index
]);
312 /* Make sure there is a type allocated for type numbers TYPENUMS
313 and return the type object.
314 This can create an empty (zeroed) type object.
315 TYPENUMS may be (-1, -1) to return a new type object that is not
316 put into the type vector, and so may not be referred to by number. */
319 dbx_alloc_type (int typenums
[2], struct objfile
*objfile
)
321 struct type
**type_addr
;
323 if (typenums
[0] == -1)
325 return (alloc_type (objfile
));
328 type_addr
= dbx_lookup_type (typenums
);
330 /* If we are referring to a type not known at all yet,
331 allocate an empty type for it.
332 We will fill it in later if we find out how. */
335 *type_addr
= alloc_type (objfile
);
341 /* for all the stabs in a given stab vector, build appropriate types
342 and fix their symbols in given symbol vector. */
345 patch_block_stabs (struct pending
*symbols
, struct pending_stabs
*stabs
,
346 struct objfile
*objfile
)
356 /* for all the stab entries, find their corresponding symbols and
357 patch their types! */
359 for (ii
= 0; ii
< stabs
->count
; ++ii
)
361 name
= stabs
->stab
[ii
];
362 pp
= (char *) strchr (name
, ':');
363 gdb_assert (pp
); /* Must find a ':' or game's over. */
367 pp
= (char *) strchr (pp
, ':');
369 sym
= find_symbol_in_list (symbols
, name
, pp
- name
);
372 /* FIXME-maybe: it would be nice if we noticed whether
373 the variable was defined *anywhere*, not just whether
374 it is defined in this compilation unit. But neither
375 xlc or GCC seem to need such a definition, and until
376 we do psymtabs (so that the minimal symbols from all
377 compilation units are available now), I'm not sure
378 how to get the information. */
380 /* On xcoff, if a global is defined and never referenced,
381 ld will remove it from the executable. There is then
382 a N_GSYM stab for it, but no regular (C_EXT) symbol. */
383 sym
= (struct symbol
*)
384 obstack_alloc (&objfile
->objfile_obstack
,
385 sizeof (struct symbol
));
387 memset (sym
, 0, sizeof (struct symbol
));
388 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
389 SYMBOL_CLASS (sym
) = LOC_OPTIMIZED_OUT
;
390 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 define_symbol (CORE_ADDR valu
, char *string
, int desc
, int type
,
584 struct objfile
*objfile
)
586 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
588 char *p
= (char *) find_name_end (string
);
592 char *new_name
= NULL
;
594 /* We would like to eliminate nameless symbols, but keep their types.
595 E.g. stab entry ":t10=*2" should produce a type 10, which is a pointer
596 to type 2, but, should not create a symbol to address that type. Since
597 the symbol will be nameless, there is no way any user can refer to it. */
601 /* Ignore syms with empty names. */
605 /* Ignore old-style symbols from cc -go */
615 /* If a nameless stab entry, all we need is the type, not the symbol.
616 e.g. ":t10=*2" or a nameless enum like " :T16=ered:0,green:1,blue:2,;" */
617 nameless
= (p
== string
|| ((string
[0] == ' ') && (string
[1] == ':')));
619 current_symbol
= sym
= (struct symbol
*)
620 obstack_alloc (&objfile
->objfile_obstack
, sizeof (struct symbol
));
621 memset (sym
, 0, sizeof (struct symbol
));
623 switch (type
& N_TYPE
)
626 SYMBOL_SECTION (sym
) = SECT_OFF_TEXT (objfile
);
629 SYMBOL_SECTION (sym
) = SECT_OFF_DATA (objfile
);
632 SYMBOL_SECTION (sym
) = SECT_OFF_BSS (objfile
);
636 if (processing_gcc_compilation
)
638 /* GCC 2.x puts the line number in desc. SunOS apparently puts in the
639 number of bytes occupied by a type or object, which we ignore. */
640 SYMBOL_LINE (sym
) = desc
;
644 SYMBOL_LINE (sym
) = 0; /* unknown */
647 if (is_cplus_marker (string
[0]))
649 /* Special GNU C++ names. */
653 SYMBOL_SET_LINKAGE_NAME
654 (sym
, obsavestring ("this", strlen ("this"),
655 &objfile
->objfile_obstack
));
658 case 'v': /* $vtbl_ptr_type */
662 SYMBOL_SET_LINKAGE_NAME
663 (sym
, obsavestring ("eh_throw", strlen ("eh_throw"),
664 &objfile
->objfile_obstack
));
668 /* This was an anonymous type that was never fixed up. */
672 /* SunPRO (3.0 at least) static variable encoding. */
673 if (gdbarch_static_transform_name_p (gdbarch
))
675 /* ... fall through ... */
678 complaint (&symfile_complaints
, _("Unknown C++ symbol name `%s'"),
680 goto normal
; /* Do *something* with it */
686 SYMBOL_LANGUAGE (sym
) = current_subfile
->language
;
687 if (SYMBOL_LANGUAGE (sym
) == language_cplus
)
689 char *name
= alloca (p
- string
+ 1);
690 memcpy (name
, string
, p
- string
);
691 name
[p
- string
] = '\0';
692 new_name
= cp_canonicalize_string (name
);
693 cp_scan_for_anonymous_namespaces (sym
);
695 if (new_name
!= NULL
)
697 SYMBOL_SET_NAMES (sym
, new_name
, strlen (new_name
), objfile
);
701 SYMBOL_SET_NAMES (sym
, string
, p
- string
, objfile
);
705 /* Determine the type of name being defined. */
707 /* Getting GDB to correctly skip the symbol on an undefined symbol
708 descriptor and not ever dump core is a very dodgy proposition if
709 we do things this way. I say the acorn RISC machine can just
710 fix their compiler. */
711 /* The Acorn RISC machine's compiler can put out locals that don't
712 start with "234=" or "(3,4)=", so assume anything other than the
713 deftypes we know how to handle is a local. */
714 if (!strchr ("cfFGpPrStTvVXCR", *p
))
716 if (isdigit (*p
) || *p
== '(' || *p
== '-')
725 /* c is a special case, not followed by a type-number.
726 SYMBOL:c=iVALUE for an integer constant symbol.
727 SYMBOL:c=rVALUE for a floating constant symbol.
728 SYMBOL:c=eTYPE,INTVALUE for an enum constant symbol.
729 e.g. "b:c=e6,0" for "const b = blob1"
730 (where type 6 is defined by "blobs:t6=eblob1:0,blob2:1,;"). */
733 SYMBOL_CLASS (sym
) = LOC_CONST
;
734 SYMBOL_TYPE (sym
) = error_type (&p
, objfile
);
735 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
736 add_symbol_to_list (sym
, &file_symbols
);
746 struct type
*dbl_type
;
748 /* FIXME-if-picky-about-floating-accuracy: Should be using
749 target arithmetic to get the value. real.c in GCC
750 probably has the necessary code. */
752 dbl_type
= builtin_type (gdbarch
)->builtin_double
;
754 obstack_alloc (&objfile
->objfile_obstack
,
755 TYPE_LENGTH (dbl_type
));
756 store_typed_floating (dbl_valu
, dbl_type
, d
);
758 SYMBOL_TYPE (sym
) = dbl_type
;
759 SYMBOL_VALUE_BYTES (sym
) = dbl_valu
;
760 SYMBOL_CLASS (sym
) = LOC_CONST_BYTES
;
765 /* Defining integer constants this way is kind of silly,
766 since 'e' constants allows the compiler to give not
767 only the value, but the type as well. C has at least
768 int, long, unsigned int, and long long as constant
769 types; other languages probably should have at least
770 unsigned as well as signed constants. */
772 SYMBOL_TYPE (sym
) = builtin_type (gdbarch
)->builtin_long
;
773 SYMBOL_VALUE (sym
) = atoi (p
);
774 SYMBOL_CLASS (sym
) = LOC_CONST
;
778 /* SYMBOL:c=eTYPE,INTVALUE for a constant symbol whose value
779 can be represented as integral.
780 e.g. "b:c=e6,0" for "const b = blob1"
781 (where type 6 is defined by "blobs:t6=eblob1:0,blob2:1,;"). */
783 SYMBOL_CLASS (sym
) = LOC_CONST
;
784 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
788 SYMBOL_TYPE (sym
) = error_type (&p
, objfile
);
793 /* If the value is too big to fit in an int (perhaps because
794 it is unsigned), or something like that, we silently get
795 a bogus value. The type and everything else about it is
796 correct. Ideally, we should be using whatever we have
797 available for parsing unsigned and long long values,
799 SYMBOL_VALUE (sym
) = atoi (p
);
804 SYMBOL_CLASS (sym
) = LOC_CONST
;
805 SYMBOL_TYPE (sym
) = error_type (&p
, objfile
);
808 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
809 add_symbol_to_list (sym
, &file_symbols
);
813 /* The name of a caught exception. */
814 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
815 SYMBOL_CLASS (sym
) = LOC_LABEL
;
816 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
817 SYMBOL_VALUE_ADDRESS (sym
) = valu
;
818 add_symbol_to_list (sym
, &local_symbols
);
822 /* A static function definition. */
823 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
824 SYMBOL_CLASS (sym
) = LOC_BLOCK
;
825 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
826 add_symbol_to_list (sym
, &file_symbols
);
827 /* fall into process_function_types. */
829 process_function_types
:
830 /* Function result types are described as the result type in stabs.
831 We need to convert this to the function-returning-type-X type
832 in GDB. E.g. "int" is converted to "function returning int". */
833 if (TYPE_CODE (SYMBOL_TYPE (sym
)) != TYPE_CODE_FUNC
)
834 SYMBOL_TYPE (sym
) = lookup_function_type (SYMBOL_TYPE (sym
));
836 /* All functions in C++ have prototypes. Stabs does not offer an
837 explicit way to identify prototyped or unprototyped functions,
838 but both GCC and Sun CC emit stabs for the "call-as" type rather
839 than the "declared-as" type for unprototyped functions, so
840 we treat all functions as if they were prototyped. This is used
841 primarily for promotion when calling the function from GDB. */
842 TYPE_PROTOTYPED (SYMBOL_TYPE (sym
)) = 1;
844 /* fall into process_prototype_types */
846 process_prototype_types
:
847 /* Sun acc puts declared types of arguments here. */
850 struct type
*ftype
= SYMBOL_TYPE (sym
);
855 /* Obtain a worst case guess for the number of arguments
856 by counting the semicolons. */
863 /* Allocate parameter information fields and fill them in. */
864 TYPE_FIELDS (ftype
) = (struct field
*)
865 TYPE_ALLOC (ftype
, nsemi
* sizeof (struct field
));
870 /* A type number of zero indicates the start of varargs.
871 FIXME: GDB currently ignores vararg functions. */
872 if (p
[0] == '0' && p
[1] == '\0')
874 ptype
= read_type (&p
, objfile
);
876 /* The Sun compilers mark integer arguments, which should
877 be promoted to the width of the calling conventions, with
878 a type which references itself. This type is turned into
879 a TYPE_CODE_VOID type by read_type, and we have to turn
880 it back into builtin_int here.
881 FIXME: Do we need a new builtin_promoted_int_arg ? */
882 if (TYPE_CODE (ptype
) == TYPE_CODE_VOID
)
883 ptype
= builtin_type (gdbarch
)->builtin_int
;
884 TYPE_FIELD_TYPE (ftype
, nparams
) = ptype
;
885 TYPE_FIELD_ARTIFICIAL (ftype
, nparams
++) = 0;
887 TYPE_NFIELDS (ftype
) = nparams
;
888 TYPE_PROTOTYPED (ftype
) = 1;
893 /* A global function definition. */
894 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
895 SYMBOL_CLASS (sym
) = LOC_BLOCK
;
896 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
897 add_symbol_to_list (sym
, &global_symbols
);
898 goto process_function_types
;
901 /* For a class G (global) symbol, it appears that the
902 value is not correct. It is necessary to search for the
903 corresponding linker definition to find the value.
904 These definitions appear at the end of the namelist. */
905 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
906 SYMBOL_CLASS (sym
) = LOC_STATIC
;
907 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
908 /* Don't add symbol references to global_sym_chain.
909 Symbol references don't have valid names and wont't match up with
910 minimal symbols when the global_sym_chain is relocated.
911 We'll fixup symbol references when we fixup the defining symbol. */
912 if (SYMBOL_LINKAGE_NAME (sym
) && SYMBOL_LINKAGE_NAME (sym
)[0] != '#')
914 i
= hashname (SYMBOL_LINKAGE_NAME (sym
));
915 SYMBOL_VALUE_CHAIN (sym
) = global_sym_chain
[i
];
916 global_sym_chain
[i
] = sym
;
918 add_symbol_to_list (sym
, &global_symbols
);
921 /* This case is faked by a conditional above,
922 when there is no code letter in the dbx data.
923 Dbx data never actually contains 'l'. */
926 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
927 SYMBOL_CLASS (sym
) = LOC_LOCAL
;
928 SYMBOL_VALUE (sym
) = valu
;
929 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
930 add_symbol_to_list (sym
, &local_symbols
);
935 /* pF is a two-letter code that means a function parameter in Fortran.
936 The type-number specifies the type of the return value.
937 Translate it into a pointer-to-function type. */
941 = lookup_pointer_type
942 (lookup_function_type (read_type (&p
, objfile
)));
945 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
947 SYMBOL_CLASS (sym
) = LOC_ARG
;
948 SYMBOL_VALUE (sym
) = valu
;
949 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
950 SYMBOL_IS_ARGUMENT (sym
) = 1;
951 add_symbol_to_list (sym
, &local_symbols
);
953 if (gdbarch_byte_order (gdbarch
) != BFD_ENDIAN_BIG
)
955 /* On little-endian machines, this crud is never necessary,
956 and, if the extra bytes contain garbage, is harmful. */
960 /* If it's gcc-compiled, if it says `short', believe it. */
961 if (processing_gcc_compilation
962 || gdbarch_believe_pcc_promotion (gdbarch
))
965 if (!gdbarch_believe_pcc_promotion (gdbarch
))
967 /* If PCC says a parameter is a short or a char, it is
969 if (TYPE_LENGTH (SYMBOL_TYPE (sym
))
970 < gdbarch_int_bit (gdbarch
) / TARGET_CHAR_BIT
971 && TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_INT
)
974 TYPE_UNSIGNED (SYMBOL_TYPE (sym
))
975 ? builtin_type (gdbarch
)->builtin_unsigned_int
976 : builtin_type (gdbarch
)->builtin_int
;
982 /* acc seems to use P to declare the prototypes of functions that
983 are referenced by this file. gdb is not prepared to deal
984 with this extra information. FIXME, it ought to. */
987 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
988 goto process_prototype_types
;
993 /* Parameter which is in a register. */
994 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
995 SYMBOL_CLASS (sym
) = LOC_REGISTER
;
996 SYMBOL_IS_ARGUMENT (sym
) = 1;
997 SYMBOL_VALUE (sym
) = gdbarch_stab_reg_to_regnum (current_gdbarch
, valu
);
998 if (SYMBOL_VALUE (sym
) >= gdbarch_num_regs (current_gdbarch
)
999 + gdbarch_num_pseudo_regs (current_gdbarch
))
1001 reg_value_complaint (SYMBOL_VALUE (sym
),
1002 gdbarch_num_regs (current_gdbarch
)
1003 + gdbarch_num_pseudo_regs (current_gdbarch
),
1004 SYMBOL_PRINT_NAME (sym
));
1005 SYMBOL_VALUE (sym
) = gdbarch_sp_regnum (current_gdbarch
);
1006 /* Known safe, though useless */
1008 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1009 add_symbol_to_list (sym
, &local_symbols
);
1013 /* Register variable (either global or local). */
1014 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
1015 SYMBOL_CLASS (sym
) = LOC_REGISTER
;
1016 SYMBOL_VALUE (sym
) = gdbarch_stab_reg_to_regnum (current_gdbarch
, valu
);
1017 if (SYMBOL_VALUE (sym
) >= gdbarch_num_regs (current_gdbarch
)
1018 + gdbarch_num_pseudo_regs (current_gdbarch
))
1020 reg_value_complaint (SYMBOL_VALUE (sym
),
1021 gdbarch_num_regs (current_gdbarch
)
1022 + gdbarch_num_pseudo_regs (current_gdbarch
),
1023 SYMBOL_PRINT_NAME (sym
));
1024 SYMBOL_VALUE (sym
) = gdbarch_sp_regnum (current_gdbarch
);
1025 /* Known safe, though useless */
1027 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1028 if (within_function
)
1030 /* Sun cc uses a pair of symbols, one 'p' and one 'r', with
1031 the same name to represent an argument passed in a
1032 register. GCC uses 'P' for the same case. So if we find
1033 such a symbol pair we combine it into one 'P' symbol.
1034 For Sun cc we need to do this regardless of
1035 stabs_argument_has_addr, because the compiler puts out
1036 the 'p' symbol even if it never saves the argument onto
1039 On most machines, we want to preserve both symbols, so
1040 that we can still get information about what is going on
1041 with the stack (VAX for computing args_printed, using
1042 stack slots instead of saved registers in backtraces,
1045 Note that this code illegally combines
1046 main(argc) struct foo argc; { register struct foo argc; }
1047 but this case is considered pathological and causes a warning
1048 from a decent compiler. */
1051 && local_symbols
->nsyms
> 0
1052 && gdbarch_stabs_argument_has_addr (gdbarch
, SYMBOL_TYPE (sym
)))
1054 struct symbol
*prev_sym
;
1055 prev_sym
= local_symbols
->symbol
[local_symbols
->nsyms
- 1];
1056 if ((SYMBOL_CLASS (prev_sym
) == LOC_REF_ARG
1057 || SYMBOL_CLASS (prev_sym
) == LOC_ARG
)
1058 && strcmp (SYMBOL_LINKAGE_NAME (prev_sym
),
1059 SYMBOL_LINKAGE_NAME (sym
)) == 0)
1061 SYMBOL_CLASS (prev_sym
) = LOC_REGISTER
;
1062 /* Use the type from the LOC_REGISTER; that is the type
1063 that is actually in that register. */
1064 SYMBOL_TYPE (prev_sym
) = SYMBOL_TYPE (sym
);
1065 SYMBOL_VALUE (prev_sym
) = SYMBOL_VALUE (sym
);
1070 add_symbol_to_list (sym
, &local_symbols
);
1073 add_symbol_to_list (sym
, &file_symbols
);
1077 /* Static symbol at top level of file */
1078 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
1079 SYMBOL_CLASS (sym
) = LOC_STATIC
;
1080 SYMBOL_VALUE_ADDRESS (sym
) = valu
;
1081 if (gdbarch_static_transform_name_p (gdbarch
)
1082 && gdbarch_static_transform_name (gdbarch
,
1083 SYMBOL_LINKAGE_NAME (sym
))
1084 != SYMBOL_LINKAGE_NAME (sym
))
1086 struct minimal_symbol
*msym
;
1087 msym
= lookup_minimal_symbol (SYMBOL_LINKAGE_NAME (sym
), NULL
, objfile
);
1090 char *new_name
= gdbarch_static_transform_name
1091 (gdbarch
, SYMBOL_LINKAGE_NAME (sym
));
1092 SYMBOL_SET_LINKAGE_NAME (sym
, new_name
);
1093 SYMBOL_VALUE_ADDRESS (sym
) = SYMBOL_VALUE_ADDRESS (msym
);
1096 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1097 add_symbol_to_list (sym
, &file_symbols
);
1101 /* In Ada, there is no distinction between typedef and non-typedef;
1102 any type declaration implicitly has the equivalent of a typedef,
1103 and thus 't' is in fact equivalent to 'Tt'.
1105 Therefore, for Ada units, we check the character immediately
1106 before the 't', and if we do not find a 'T', then make sure to
1107 create the associated symbol in the STRUCT_DOMAIN ('t' definitions
1108 will be stored in the VAR_DOMAIN). If the symbol was indeed
1109 defined as 'Tt' then the STRUCT_DOMAIN symbol will be created
1110 elsewhere, so we don't need to take care of that.
1112 This is important to do, because of forward references:
1113 The cleanup of undefined types stored in undef_types only uses
1114 STRUCT_DOMAIN symbols to perform the replacement. */
1115 synonym
= (SYMBOL_LANGUAGE (sym
) == language_ada
&& p
[-2] != 'T');
1118 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
1120 /* For a nameless type, we don't want a create a symbol, thus we
1121 did not use `sym'. Return without further processing. */
1125 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
1126 SYMBOL_VALUE (sym
) = valu
;
1127 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1128 /* C++ vagaries: we may have a type which is derived from
1129 a base type which did not have its name defined when the
1130 derived class was output. We fill in the derived class's
1131 base part member's name here in that case. */
1132 if (TYPE_NAME (SYMBOL_TYPE (sym
)) != NULL
)
1133 if ((TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_STRUCT
1134 || TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_UNION
)
1135 && TYPE_N_BASECLASSES (SYMBOL_TYPE (sym
)))
1138 for (j
= TYPE_N_BASECLASSES (SYMBOL_TYPE (sym
)) - 1; j
>= 0; j
--)
1139 if (TYPE_BASECLASS_NAME (SYMBOL_TYPE (sym
), j
) == 0)
1140 TYPE_BASECLASS_NAME (SYMBOL_TYPE (sym
), j
) =
1141 type_name_no_tag (TYPE_BASECLASS (SYMBOL_TYPE (sym
), j
));
1144 if (TYPE_NAME (SYMBOL_TYPE (sym
)) == NULL
)
1146 /* gcc-2.6 or later (when using -fvtable-thunks)
1147 emits a unique named type for a vtable entry.
1148 Some gdb code depends on that specific name. */
1149 extern const char vtbl_ptr_name
[];
1151 if ((TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_PTR
1152 && strcmp (SYMBOL_LINKAGE_NAME (sym
), vtbl_ptr_name
))
1153 || TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_FUNC
)
1155 /* If we are giving a name to a type such as "pointer to
1156 foo" or "function returning foo", we better not set
1157 the TYPE_NAME. If the program contains "typedef char
1158 *caddr_t;", we don't want all variables of type char
1159 * to print as caddr_t. This is not just a
1160 consequence of GDB's type management; PCC and GCC (at
1161 least through version 2.4) both output variables of
1162 either type char * or caddr_t with the type number
1163 defined in the 't' symbol for caddr_t. If a future
1164 compiler cleans this up it GDB is not ready for it
1165 yet, but if it becomes ready we somehow need to
1166 disable this check (without breaking the PCC/GCC2.4
1171 Fortunately, this check seems not to be necessary
1172 for anything except pointers or functions. */
1173 /* ezannoni: 2000-10-26. This seems to apply for
1174 versions of gcc older than 2.8. This was the original
1175 problem: with the following code gdb would tell that
1176 the type for name1 is caddr_t, and func is char()
1177 typedef char *caddr_t;
1189 /* Pascal accepts names for pointer types. */
1190 if (current_subfile
->language
== language_pascal
)
1192 TYPE_NAME (SYMBOL_TYPE (sym
)) = SYMBOL_LINKAGE_NAME (sym
);
1196 TYPE_NAME (SYMBOL_TYPE (sym
)) = SYMBOL_LINKAGE_NAME (sym
);
1199 add_symbol_to_list (sym
, &file_symbols
);
1203 /* Create the STRUCT_DOMAIN clone. */
1204 struct symbol
*struct_sym
= (struct symbol
*)
1205 obstack_alloc (&objfile
->objfile_obstack
, sizeof (struct symbol
));
1208 SYMBOL_CLASS (struct_sym
) = LOC_TYPEDEF
;
1209 SYMBOL_VALUE (struct_sym
) = valu
;
1210 SYMBOL_DOMAIN (struct_sym
) = STRUCT_DOMAIN
;
1211 if (TYPE_NAME (SYMBOL_TYPE (sym
)) == 0)
1212 TYPE_NAME (SYMBOL_TYPE (sym
))
1213 = obconcat (&objfile
->objfile_obstack
, "", "",
1214 SYMBOL_LINKAGE_NAME (sym
));
1215 add_symbol_to_list (struct_sym
, &file_symbols
);
1221 /* Struct, union, or enum tag. For GNU C++, this can be be followed
1222 by 't' which means we are typedef'ing it as well. */
1223 synonym
= *p
== 't';
1228 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
1230 /* For a nameless type, we don't want a create a symbol, thus we
1231 did not use `sym'. Return without further processing. */
1235 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
1236 SYMBOL_VALUE (sym
) = valu
;
1237 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
1238 if (TYPE_TAG_NAME (SYMBOL_TYPE (sym
)) == 0)
1239 TYPE_TAG_NAME (SYMBOL_TYPE (sym
))
1240 = obconcat (&objfile
->objfile_obstack
, "", "",
1241 SYMBOL_LINKAGE_NAME (sym
));
1242 add_symbol_to_list (sym
, &file_symbols
);
1246 /* Clone the sym and then modify it. */
1247 struct symbol
*typedef_sym
= (struct symbol
*)
1248 obstack_alloc (&objfile
->objfile_obstack
, sizeof (struct symbol
));
1249 *typedef_sym
= *sym
;
1250 SYMBOL_CLASS (typedef_sym
) = LOC_TYPEDEF
;
1251 SYMBOL_VALUE (typedef_sym
) = valu
;
1252 SYMBOL_DOMAIN (typedef_sym
) = VAR_DOMAIN
;
1253 if (TYPE_NAME (SYMBOL_TYPE (sym
)) == 0)
1254 TYPE_NAME (SYMBOL_TYPE (sym
))
1255 = obconcat (&objfile
->objfile_obstack
, "", "",
1256 SYMBOL_LINKAGE_NAME (sym
));
1257 add_symbol_to_list (typedef_sym
, &file_symbols
);
1262 /* Static symbol of local scope */
1263 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
1264 SYMBOL_CLASS (sym
) = LOC_STATIC
;
1265 SYMBOL_VALUE_ADDRESS (sym
) = valu
;
1266 if (gdbarch_static_transform_name_p (gdbarch
)
1267 && gdbarch_static_transform_name (gdbarch
,
1268 SYMBOL_LINKAGE_NAME (sym
))
1269 != SYMBOL_LINKAGE_NAME (sym
))
1271 struct minimal_symbol
*msym
;
1272 msym
= lookup_minimal_symbol (SYMBOL_LINKAGE_NAME (sym
), NULL
, objfile
);
1275 char *new_name
= gdbarch_static_transform_name
1276 (gdbarch
, SYMBOL_LINKAGE_NAME (sym
));
1277 SYMBOL_SET_LINKAGE_NAME (sym
, new_name
);
1278 SYMBOL_VALUE_ADDRESS (sym
) = SYMBOL_VALUE_ADDRESS (msym
);
1281 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1282 add_symbol_to_list (sym
, &local_symbols
);
1286 /* Reference parameter */
1287 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
1288 SYMBOL_CLASS (sym
) = LOC_REF_ARG
;
1289 SYMBOL_IS_ARGUMENT (sym
) = 1;
1290 SYMBOL_VALUE (sym
) = valu
;
1291 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1292 add_symbol_to_list (sym
, &local_symbols
);
1296 /* Reference parameter which is in a register. */
1297 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
1298 SYMBOL_CLASS (sym
) = LOC_REGPARM_ADDR
;
1299 SYMBOL_IS_ARGUMENT (sym
) = 1;
1300 SYMBOL_VALUE (sym
) = gdbarch_stab_reg_to_regnum (current_gdbarch
, valu
);
1301 if (SYMBOL_VALUE (sym
) >= gdbarch_num_regs (current_gdbarch
)
1302 + gdbarch_num_pseudo_regs (current_gdbarch
))
1304 reg_value_complaint (SYMBOL_VALUE (sym
),
1305 gdbarch_num_regs (current_gdbarch
)
1306 + gdbarch_num_pseudo_regs (current_gdbarch
),
1307 SYMBOL_PRINT_NAME (sym
));
1308 SYMBOL_VALUE (sym
) = gdbarch_sp_regnum (current_gdbarch
);
1309 /* Known safe, though useless */
1311 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1312 add_symbol_to_list (sym
, &local_symbols
);
1316 /* This is used by Sun FORTRAN for "function result value".
1317 Sun claims ("dbx and dbxtool interfaces", 2nd ed)
1318 that Pascal uses it too, but when I tried it Pascal used
1319 "x:3" (local symbol) instead. */
1320 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
1321 SYMBOL_CLASS (sym
) = LOC_LOCAL
;
1322 SYMBOL_VALUE (sym
) = valu
;
1323 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1324 add_symbol_to_list (sym
, &local_symbols
);
1328 SYMBOL_TYPE (sym
) = error_type (&p
, objfile
);
1329 SYMBOL_CLASS (sym
) = LOC_CONST
;
1330 SYMBOL_VALUE (sym
) = 0;
1331 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1332 add_symbol_to_list (sym
, &file_symbols
);
1336 /* Some systems pass variables of certain types by reference instead
1337 of by value, i.e. they will pass the address of a structure (in a
1338 register or on the stack) instead of the structure itself. */
1340 if (gdbarch_stabs_argument_has_addr (gdbarch
, SYMBOL_TYPE (sym
))
1341 && SYMBOL_IS_ARGUMENT (sym
))
1343 /* We have to convert LOC_REGISTER to LOC_REGPARM_ADDR (for
1344 variables passed in a register). */
1345 if (SYMBOL_CLASS (sym
) == LOC_REGISTER
)
1346 SYMBOL_CLASS (sym
) = LOC_REGPARM_ADDR
;
1347 /* Likewise for converting LOC_ARG to LOC_REF_ARG (for the 7th
1348 and subsequent arguments on SPARC, for example). */
1349 else if (SYMBOL_CLASS (sym
) == LOC_ARG
)
1350 SYMBOL_CLASS (sym
) = LOC_REF_ARG
;
1356 /* Skip rest of this symbol and return an error type.
1358 General notes on error recovery: error_type always skips to the
1359 end of the symbol (modulo cretinous dbx symbol name continuation).
1360 Thus code like this:
1362 if (*(*pp)++ != ';')
1363 return error_type (pp, objfile);
1365 is wrong because if *pp starts out pointing at '\0' (typically as the
1366 result of an earlier error), it will be incremented to point to the
1367 start of the next symbol, which might produce strange results, at least
1368 if you run off the end of the string table. Instead use
1371 return error_type (pp, objfile);
1377 foo = error_type (pp, objfile);
1381 And in case it isn't obvious, the point of all this hair is so the compiler
1382 can define new types and new syntaxes, and old versions of the
1383 debugger will be able to read the new symbol tables. */
1385 static struct type
*
1386 error_type (char **pp
, struct objfile
*objfile
)
1388 complaint (&symfile_complaints
, _("couldn't parse type; debugger out of date?"));
1391 /* Skip to end of symbol. */
1392 while (**pp
!= '\0')
1397 /* Check for and handle cretinous dbx symbol name continuation! */
1398 if ((*pp
)[-1] == '\\' || (*pp
)[-1] == '?')
1400 *pp
= next_symbol_text (objfile
);
1407 return (builtin_type_error
);
1411 /* Read type information or a type definition; return the type. Even
1412 though this routine accepts either type information or a type
1413 definition, the distinction is relevant--some parts of stabsread.c
1414 assume that type information starts with a digit, '-', or '(' in
1415 deciding whether to call read_type. */
1417 static struct type
*
1418 read_type (char **pp
, struct objfile
*objfile
)
1420 struct type
*type
= 0;
1423 char type_descriptor
;
1425 /* Size in bits of type if specified by a type attribute, or -1 if
1426 there is no size attribute. */
1429 /* Used to distinguish string and bitstring from char-array and set. */
1432 /* Used to distinguish vector from array. */
1435 /* Read type number if present. The type number may be omitted.
1436 for instance in a two-dimensional array declared with type
1437 "ar1;1;10;ar1;1;10;4". */
1438 if ((**pp
>= '0' && **pp
<= '9')
1442 if (read_type_number (pp
, typenums
) != 0)
1443 return error_type (pp
, objfile
);
1447 /* Type is not being defined here. Either it already
1448 exists, or this is a forward reference to it.
1449 dbx_alloc_type handles both cases. */
1450 type
= dbx_alloc_type (typenums
, objfile
);
1452 /* If this is a forward reference, arrange to complain if it
1453 doesn't get patched up by the time we're done
1455 if (TYPE_CODE (type
) == TYPE_CODE_UNDEF
)
1456 add_undefined_type (type
, typenums
);
1461 /* Type is being defined here. */
1463 Also skip the type descriptor - we get it below with (*pp)[-1]. */
1468 /* 'typenums=' not present, type is anonymous. Read and return
1469 the definition, but don't put it in the type vector. */
1470 typenums
[0] = typenums
[1] = -1;
1475 type_descriptor
= (*pp
)[-1];
1476 switch (type_descriptor
)
1480 enum type_code code
;
1482 /* Used to index through file_symbols. */
1483 struct pending
*ppt
;
1486 /* Name including "struct", etc. */
1490 char *from
, *to
, *p
, *q1
, *q2
;
1492 /* Set the type code according to the following letter. */
1496 code
= TYPE_CODE_STRUCT
;
1499 code
= TYPE_CODE_UNION
;
1502 code
= TYPE_CODE_ENUM
;
1506 /* Complain and keep going, so compilers can invent new
1507 cross-reference types. */
1508 complaint (&symfile_complaints
,
1509 _("Unrecognized cross-reference type `%c'"), (*pp
)[0]);
1510 code
= TYPE_CODE_STRUCT
;
1515 q1
= strchr (*pp
, '<');
1516 p
= strchr (*pp
, ':');
1518 return error_type (pp
, objfile
);
1519 if (q1
&& p
> q1
&& p
[1] == ':')
1521 int nesting_level
= 0;
1522 for (q2
= q1
; *q2
; q2
++)
1526 else if (*q2
== '>')
1528 else if (*q2
== ':' && nesting_level
== 0)
1533 return error_type (pp
, objfile
);
1536 if (current_subfile
->language
== language_cplus
)
1538 char *new_name
, *name
= alloca (p
- *pp
+ 1);
1539 memcpy (name
, *pp
, p
- *pp
);
1540 name
[p
- *pp
] = '\0';
1541 new_name
= cp_canonicalize_string (name
);
1542 if (new_name
!= NULL
)
1544 type_name
= obsavestring (new_name
, strlen (new_name
),
1545 &objfile
->objfile_obstack
);
1549 if (type_name
== NULL
)
1552 (char *) obstack_alloc (&objfile
->objfile_obstack
, p
- *pp
+ 1);
1554 /* Copy the name. */
1561 /* Set the pointer ahead of the name which we just read, and
1566 /* If this type has already been declared, then reuse the same
1567 type, rather than allocating a new one. This saves some
1570 for (ppt
= file_symbols
; ppt
; ppt
= ppt
->next
)
1571 for (i
= 0; i
< ppt
->nsyms
; i
++)
1573 struct symbol
*sym
= ppt
->symbol
[i
];
1575 if (SYMBOL_CLASS (sym
) == LOC_TYPEDEF
1576 && SYMBOL_DOMAIN (sym
) == STRUCT_DOMAIN
1577 && (TYPE_CODE (SYMBOL_TYPE (sym
)) == code
)
1578 && strcmp (SYMBOL_LINKAGE_NAME (sym
), type_name
) == 0)
1580 obstack_free (&objfile
->objfile_obstack
, type_name
);
1581 type
= SYMBOL_TYPE (sym
);
1582 if (typenums
[0] != -1)
1583 *dbx_lookup_type (typenums
) = type
;
1588 /* Didn't find the type to which this refers, so we must
1589 be dealing with a forward reference. Allocate a type
1590 structure for it, and keep track of it so we can
1591 fill in the rest of the fields when we get the full
1593 type
= dbx_alloc_type (typenums
, objfile
);
1594 TYPE_CODE (type
) = code
;
1595 TYPE_TAG_NAME (type
) = type_name
;
1596 INIT_CPLUS_SPECIFIC (type
);
1597 TYPE_STUB (type
) = 1;
1599 add_undefined_type (type
, typenums
);
1603 case '-': /* RS/6000 built-in type */
1617 /* We deal with something like t(1,2)=(3,4)=... which
1618 the Lucid compiler and recent gcc versions (post 2.7.3) use. */
1620 /* Allocate and enter the typedef type first.
1621 This handles recursive types. */
1622 type
= dbx_alloc_type (typenums
, objfile
);
1623 TYPE_CODE (type
) = TYPE_CODE_TYPEDEF
;
1625 struct type
*xtype
= read_type (pp
, objfile
);
1628 /* It's being defined as itself. That means it is "void". */
1629 TYPE_CODE (type
) = TYPE_CODE_VOID
;
1630 TYPE_LENGTH (type
) = 1;
1632 else if (type_size
>= 0 || is_string
)
1634 /* This is the absolute wrong way to construct types. Every
1635 other debug format has found a way around this problem and
1636 the related problems with unnecessarily stubbed types;
1637 someone motivated should attempt to clean up the issue
1638 here as well. Once a type pointed to has been created it
1639 should not be modified.
1641 Well, it's not *absolutely* wrong. Constructing recursive
1642 types (trees, linked lists) necessarily entails modifying
1643 types after creating them. Constructing any loop structure
1644 entails side effects. The Dwarf 2 reader does handle this
1645 more gracefully (it never constructs more than once
1646 instance of a type object, so it doesn't have to copy type
1647 objects wholesale), but it still mutates type objects after
1648 other folks have references to them.
1650 Keep in mind that this circularity/mutation issue shows up
1651 at the source language level, too: C's "incomplete types",
1652 for example. So the proper cleanup, I think, would be to
1653 limit GDB's type smashing to match exactly those required
1654 by the source language. So GDB could have a
1655 "complete_this_type" function, but never create unnecessary
1656 copies of a type otherwise. */
1657 replace_type (type
, xtype
);
1658 TYPE_NAME (type
) = NULL
;
1659 TYPE_TAG_NAME (type
) = NULL
;
1663 TYPE_TARGET_STUB (type
) = 1;
1664 TYPE_TARGET_TYPE (type
) = xtype
;
1669 /* In the following types, we must be sure to overwrite any existing
1670 type that the typenums refer to, rather than allocating a new one
1671 and making the typenums point to the new one. This is because there
1672 may already be pointers to the existing type (if it had been
1673 forward-referenced), and we must change it to a pointer, function,
1674 reference, or whatever, *in-place*. */
1676 case '*': /* Pointer to another type */
1677 type1
= read_type (pp
, objfile
);
1678 type
= make_pointer_type (type1
, dbx_lookup_type (typenums
));
1681 case '&': /* Reference to another type */
1682 type1
= read_type (pp
, objfile
);
1683 type
= make_reference_type (type1
, dbx_lookup_type (typenums
));
1686 case 'f': /* Function returning another type */
1687 type1
= read_type (pp
, objfile
);
1688 type
= make_function_type (type1
, dbx_lookup_type (typenums
), objfile
);
1691 case 'g': /* Prototyped function. (Sun) */
1693 /* Unresolved questions:
1695 - According to Sun's ``STABS Interface Manual'', for 'f'
1696 and 'F' symbol descriptors, a `0' in the argument type list
1697 indicates a varargs function. But it doesn't say how 'g'
1698 type descriptors represent that info. Someone with access
1699 to Sun's toolchain should try it out.
1701 - According to the comment in define_symbol (search for
1702 `process_prototype_types:'), Sun emits integer arguments as
1703 types which ref themselves --- like `void' types. Do we
1704 have to deal with that here, too? Again, someone with
1705 access to Sun's toolchain should try it out and let us
1708 const char *type_start
= (*pp
) - 1;
1709 struct type
*return_type
= read_type (pp
, objfile
);
1710 struct type
*func_type
1711 = make_function_type (return_type
, dbx_lookup_type (typenums
),
1715 struct type_list
*next
;
1719 while (**pp
&& **pp
!= '#')
1721 struct type
*arg_type
= read_type (pp
, objfile
);
1722 struct type_list
*new = alloca (sizeof (*new));
1723 new->type
= arg_type
;
1724 new->next
= arg_types
;
1732 complaint (&symfile_complaints
,
1733 _("Prototyped function type didn't end arguments with `#':\n%s"),
1737 /* If there is just one argument whose type is `void', then
1738 that's just an empty argument list. */
1740 && ! arg_types
->next
1741 && TYPE_CODE (arg_types
->type
) == TYPE_CODE_VOID
)
1744 TYPE_FIELDS (func_type
)
1745 = (struct field
*) TYPE_ALLOC (func_type
,
1746 num_args
* sizeof (struct field
));
1747 memset (TYPE_FIELDS (func_type
), 0, num_args
* sizeof (struct field
));
1750 struct type_list
*t
;
1752 /* We stuck each argument type onto the front of the list
1753 when we read it, so the list is reversed. Build the
1754 fields array right-to-left. */
1755 for (t
= arg_types
, i
= num_args
- 1; t
; t
= t
->next
, i
--)
1756 TYPE_FIELD_TYPE (func_type
, i
) = t
->type
;
1758 TYPE_NFIELDS (func_type
) = num_args
;
1759 TYPE_PROTOTYPED (func_type
) = 1;
1765 case 'k': /* Const qualifier on some type (Sun) */
1766 type
= read_type (pp
, objfile
);
1767 type
= make_cv_type (1, TYPE_VOLATILE (type
), type
,
1768 dbx_lookup_type (typenums
));
1771 case 'B': /* Volatile qual on some type (Sun) */
1772 type
= read_type (pp
, objfile
);
1773 type
= make_cv_type (TYPE_CONST (type
), 1, type
,
1774 dbx_lookup_type (typenums
));
1778 if (isdigit (**pp
) || **pp
== '(' || **pp
== '-')
1779 { /* Member (class & variable) type */
1780 /* FIXME -- we should be doing smash_to_XXX types here. */
1782 struct type
*domain
= read_type (pp
, objfile
);
1783 struct type
*memtype
;
1786 /* Invalid member type data format. */
1787 return error_type (pp
, objfile
);
1790 memtype
= read_type (pp
, objfile
);
1791 type
= dbx_alloc_type (typenums
, objfile
);
1792 smash_to_memberptr_type (type
, domain
, memtype
);
1795 /* type attribute */
1798 /* Skip to the semicolon. */
1799 while (**pp
!= ';' && **pp
!= '\0')
1802 return error_type (pp
, objfile
);
1804 ++ * pp
; /* Skip the semicolon. */
1808 case 's': /* Size attribute */
1809 type_size
= atoi (attr
+ 1);
1814 case 'S': /* String attribute */
1815 /* FIXME: check to see if following type is array? */
1819 case 'V': /* Vector attribute */
1820 /* FIXME: check to see if following type is array? */
1825 /* Ignore unrecognized type attributes, so future compilers
1826 can invent new ones. */
1834 case '#': /* Method (class & fn) type */
1835 if ((*pp
)[0] == '#')
1837 /* We'll get the parameter types from the name. */
1838 struct type
*return_type
;
1841 return_type
= read_type (pp
, objfile
);
1842 if (*(*pp
)++ != ';')
1843 complaint (&symfile_complaints
,
1844 _("invalid (minimal) member type data format at symtab pos %d."),
1846 type
= allocate_stub_method (return_type
);
1847 if (typenums
[0] != -1)
1848 *dbx_lookup_type (typenums
) = type
;
1852 struct type
*domain
= read_type (pp
, objfile
);
1853 struct type
*return_type
;
1858 /* Invalid member type data format. */
1859 return error_type (pp
, objfile
);
1863 return_type
= read_type (pp
, objfile
);
1864 args
= read_args (pp
, ';', objfile
, &nargs
, &varargs
);
1866 return error_type (pp
, objfile
);
1867 type
= dbx_alloc_type (typenums
, objfile
);
1868 smash_to_method_type (type
, domain
, return_type
, args
,
1873 case 'r': /* Range type */
1874 type
= read_range_type (pp
, typenums
, type_size
, objfile
);
1875 if (typenums
[0] != -1)
1876 *dbx_lookup_type (typenums
) = type
;
1881 /* Sun ACC builtin int type */
1882 type
= read_sun_builtin_type (pp
, typenums
, objfile
);
1883 if (typenums
[0] != -1)
1884 *dbx_lookup_type (typenums
) = type
;
1888 case 'R': /* Sun ACC builtin float type */
1889 type
= read_sun_floating_type (pp
, typenums
, objfile
);
1890 if (typenums
[0] != -1)
1891 *dbx_lookup_type (typenums
) = type
;
1894 case 'e': /* Enumeration type */
1895 type
= dbx_alloc_type (typenums
, objfile
);
1896 type
= read_enum_type (pp
, type
, objfile
);
1897 if (typenums
[0] != -1)
1898 *dbx_lookup_type (typenums
) = type
;
1901 case 's': /* Struct type */
1902 case 'u': /* Union type */
1904 enum type_code type_code
= TYPE_CODE_UNDEF
;
1905 type
= dbx_alloc_type (typenums
, objfile
);
1906 switch (type_descriptor
)
1909 type_code
= TYPE_CODE_STRUCT
;
1912 type_code
= TYPE_CODE_UNION
;
1915 type
= read_struct_type (pp
, type
, type_code
, objfile
);
1919 case 'a': /* Array type */
1921 return error_type (pp
, objfile
);
1924 type
= dbx_alloc_type (typenums
, objfile
);
1925 type
= read_array_type (pp
, type
, objfile
);
1927 TYPE_CODE (type
) = TYPE_CODE_STRING
;
1929 make_vector_type (type
);
1932 case 'S': /* Set or bitstring type */
1933 type1
= read_type (pp
, objfile
);
1934 type
= create_set_type ((struct type
*) NULL
, type1
);
1936 TYPE_CODE (type
) = TYPE_CODE_BITSTRING
;
1937 if (typenums
[0] != -1)
1938 *dbx_lookup_type (typenums
) = type
;
1942 --*pp
; /* Go back to the symbol in error */
1943 /* Particularly important if it was \0! */
1944 return error_type (pp
, objfile
);
1949 warning (_("GDB internal error, type is NULL in stabsread.c."));
1950 return error_type (pp
, objfile
);
1953 /* Size specified in a type attribute overrides any other size. */
1954 if (type_size
!= -1)
1955 TYPE_LENGTH (type
) = (type_size
+ TARGET_CHAR_BIT
- 1) / TARGET_CHAR_BIT
;
1960 /* RS/6000 xlc/dbx combination uses a set of builtin types, starting from -1.
1961 Return the proper type node for a given builtin type number. */
1963 static struct type
*
1964 rs6000_builtin_type (int typenum
)
1966 /* We recognize types numbered from -NUMBER_RECOGNIZED to -1. */
1967 #define NUMBER_RECOGNIZED 34
1968 /* This includes an empty slot for type number -0. */
1969 static struct type
*negative_types
[NUMBER_RECOGNIZED
+ 1];
1970 struct type
*rettype
= NULL
;
1972 if (typenum
>= 0 || typenum
< -NUMBER_RECOGNIZED
)
1974 complaint (&symfile_complaints
, _("Unknown builtin type %d"), typenum
);
1975 return builtin_type_error
;
1977 if (negative_types
[-typenum
] != NULL
)
1978 return negative_types
[-typenum
];
1980 #if TARGET_CHAR_BIT != 8
1981 #error This code wrong for TARGET_CHAR_BIT not 8
1982 /* These definitions all assume that TARGET_CHAR_BIT is 8. I think
1983 that if that ever becomes not true, the correct fix will be to
1984 make the size in the struct type to be in bits, not in units of
1991 /* The size of this and all the other types are fixed, defined
1992 by the debugging format. If there is a type called "int" which
1993 is other than 32 bits, then it should use a new negative type
1994 number (or avoid negative type numbers for that case).
1995 See stabs.texinfo. */
1996 rettype
= init_type (TYPE_CODE_INT
, 4, 0, "int", NULL
);
1999 rettype
= init_type (TYPE_CODE_INT
, 1, 0, "char", NULL
);
2002 rettype
= init_type (TYPE_CODE_INT
, 2, 0, "short", NULL
);
2005 rettype
= init_type (TYPE_CODE_INT
, 4, 0, "long", NULL
);
2008 rettype
= init_type (TYPE_CODE_INT
, 1, TYPE_FLAG_UNSIGNED
,
2009 "unsigned char", NULL
);
2012 rettype
= init_type (TYPE_CODE_INT
, 1, 0, "signed char", NULL
);
2015 rettype
= init_type (TYPE_CODE_INT
, 2, TYPE_FLAG_UNSIGNED
,
2016 "unsigned short", NULL
);
2019 rettype
= init_type (TYPE_CODE_INT
, 4, TYPE_FLAG_UNSIGNED
,
2020 "unsigned int", NULL
);
2023 rettype
= init_type (TYPE_CODE_INT
, 4, TYPE_FLAG_UNSIGNED
,
2026 rettype
= init_type (TYPE_CODE_INT
, 4, TYPE_FLAG_UNSIGNED
,
2027 "unsigned long", NULL
);
2030 rettype
= init_type (TYPE_CODE_VOID
, 1, 0, "void", NULL
);
2033 /* IEEE single precision (32 bit). */
2034 rettype
= init_type (TYPE_CODE_FLT
, 4, 0, "float", NULL
);
2037 /* IEEE double precision (64 bit). */
2038 rettype
= init_type (TYPE_CODE_FLT
, 8, 0, "double", NULL
);
2041 /* This is an IEEE double on the RS/6000, and different machines with
2042 different sizes for "long double" should use different negative
2043 type numbers. See stabs.texinfo. */
2044 rettype
= init_type (TYPE_CODE_FLT
, 8, 0, "long double", NULL
);
2047 rettype
= init_type (TYPE_CODE_INT
, 4, 0, "integer", NULL
);
2050 rettype
= init_type (TYPE_CODE_BOOL
, 4, TYPE_FLAG_UNSIGNED
,
2054 rettype
= init_type (TYPE_CODE_FLT
, 4, 0, "short real", NULL
);
2057 rettype
= init_type (TYPE_CODE_FLT
, 8, 0, "real", NULL
);
2060 rettype
= init_type (TYPE_CODE_ERROR
, 0, 0, "stringptr", NULL
);
2063 rettype
= init_type (TYPE_CODE_CHAR
, 1, TYPE_FLAG_UNSIGNED
,
2067 rettype
= init_type (TYPE_CODE_BOOL
, 1, TYPE_FLAG_UNSIGNED
,
2071 rettype
= init_type (TYPE_CODE_BOOL
, 2, TYPE_FLAG_UNSIGNED
,
2075 rettype
= init_type (TYPE_CODE_BOOL
, 4, TYPE_FLAG_UNSIGNED
,
2079 rettype
= init_type (TYPE_CODE_BOOL
, 4, TYPE_FLAG_UNSIGNED
,
2083 /* Complex type consisting of two IEEE single precision values. */
2084 rettype
= init_type (TYPE_CODE_COMPLEX
, 8, 0, "complex", NULL
);
2085 TYPE_TARGET_TYPE (rettype
) = init_type (TYPE_CODE_FLT
, 4, 0, "float",
2089 /* Complex type consisting of two IEEE double precision values. */
2090 rettype
= init_type (TYPE_CODE_COMPLEX
, 16, 0, "double complex", NULL
);
2091 TYPE_TARGET_TYPE (rettype
) = init_type (TYPE_CODE_FLT
, 8, 0, "double",
2095 rettype
= init_type (TYPE_CODE_INT
, 1, 0, "integer*1", NULL
);
2098 rettype
= init_type (TYPE_CODE_INT
, 2, 0, "integer*2", NULL
);
2101 rettype
= init_type (TYPE_CODE_INT
, 4, 0, "integer*4", NULL
);
2104 rettype
= init_type (TYPE_CODE_CHAR
, 2, 0, "wchar", NULL
);
2107 rettype
= init_type (TYPE_CODE_INT
, 8, 0, "long long", NULL
);
2110 rettype
= init_type (TYPE_CODE_INT
, 8, TYPE_FLAG_UNSIGNED
,
2111 "unsigned long long", NULL
);
2114 rettype
= init_type (TYPE_CODE_INT
, 8, TYPE_FLAG_UNSIGNED
,
2118 rettype
= init_type (TYPE_CODE_INT
, 8, 0, "integer*8", NULL
);
2121 negative_types
[-typenum
] = rettype
;
2125 /* This page contains subroutines of read_type. */
2127 /* Replace *OLD_NAME with the method name portion of PHYSNAME. */
2130 update_method_name_from_physname (char **old_name
, char *physname
)
2134 method_name
= method_name_from_physname (physname
);
2136 if (method_name
== NULL
)
2138 complaint (&symfile_complaints
,
2139 _("Method has bad physname %s\n"), physname
);
2143 if (strcmp (*old_name
, method_name
) != 0)
2146 *old_name
= method_name
;
2149 xfree (method_name
);
2152 /* Read member function stabs info for C++ classes. The form of each member
2155 NAME :: TYPENUM[=type definition] ARGS : PHYSNAME ;
2157 An example with two member functions is:
2159 afunc1::20=##15;:i;2A.;afunc2::20:i;2A.;
2161 For the case of overloaded operators, the format is op$::*.funcs, where
2162 $ is the CPLUS_MARKER (usually '$'), `*' holds the place for an operator
2163 name (such as `+=') and `.' marks the end of the operator name.
2165 Returns 1 for success, 0 for failure. */
2168 read_member_functions (struct field_info
*fip
, char **pp
, struct type
*type
,
2169 struct objfile
*objfile
)
2173 /* Total number of member functions defined in this class. If the class
2174 defines two `f' functions, and one `g' function, then this will have
2176 int total_length
= 0;
2180 struct next_fnfield
*next
;
2181 struct fn_field fn_field
;
2184 struct type
*look_ahead_type
;
2185 struct next_fnfieldlist
*new_fnlist
;
2186 struct next_fnfield
*new_sublist
;
2190 /* Process each list until we find something that is not a member function
2191 or find the end of the functions. */
2195 /* We should be positioned at the start of the function name.
2196 Scan forward to find the first ':' and if it is not the
2197 first of a "::" delimiter, then this is not a member function. */
2209 look_ahead_type
= NULL
;
2212 new_fnlist
= (struct next_fnfieldlist
*)
2213 xmalloc (sizeof (struct next_fnfieldlist
));
2214 make_cleanup (xfree
, new_fnlist
);
2215 memset (new_fnlist
, 0, sizeof (struct next_fnfieldlist
));
2217 if ((*pp
)[0] == 'o' && (*pp
)[1] == 'p' && is_cplus_marker ((*pp
)[2]))
2219 /* This is a completely wierd case. In order to stuff in the
2220 names that might contain colons (the usual name delimiter),
2221 Mike Tiemann defined a different name format which is
2222 signalled if the identifier is "op$". In that case, the
2223 format is "op$::XXXX." where XXXX is the name. This is
2224 used for names like "+" or "=". YUUUUUUUK! FIXME! */
2225 /* This lets the user type "break operator+".
2226 We could just put in "+" as the name, but that wouldn't
2228 static char opname
[32] = "op$";
2229 char *o
= opname
+ 3;
2231 /* Skip past '::'. */
2234 STABS_CONTINUE (pp
, objfile
);
2240 main_fn_name
= savestring (opname
, o
- opname
);
2246 main_fn_name
= savestring (*pp
, p
- *pp
);
2247 /* Skip past '::'. */
2250 new_fnlist
->fn_fieldlist
.name
= main_fn_name
;
2255 (struct next_fnfield
*) xmalloc (sizeof (struct next_fnfield
));
2256 make_cleanup (xfree
, new_sublist
);
2257 memset (new_sublist
, 0, sizeof (struct next_fnfield
));
2259 /* Check for and handle cretinous dbx symbol name continuation! */
2260 if (look_ahead_type
== NULL
)
2263 STABS_CONTINUE (pp
, objfile
);
2265 new_sublist
->fn_field
.type
= read_type (pp
, objfile
);
2268 /* Invalid symtab info for member function. */
2274 /* g++ version 1 kludge */
2275 new_sublist
->fn_field
.type
= look_ahead_type
;
2276 look_ahead_type
= NULL
;
2286 /* If this is just a stub, then we don't have the real name here. */
2288 if (TYPE_STUB (new_sublist
->fn_field
.type
))
2290 if (!TYPE_DOMAIN_TYPE (new_sublist
->fn_field
.type
))
2291 TYPE_DOMAIN_TYPE (new_sublist
->fn_field
.type
) = type
;
2292 new_sublist
->fn_field
.is_stub
= 1;
2294 new_sublist
->fn_field
.physname
= savestring (*pp
, p
- *pp
);
2297 /* Set this member function's visibility fields. */
2300 case VISIBILITY_PRIVATE
:
2301 new_sublist
->fn_field
.is_private
= 1;
2303 case VISIBILITY_PROTECTED
:
2304 new_sublist
->fn_field
.is_protected
= 1;
2308 STABS_CONTINUE (pp
, objfile
);
2311 case 'A': /* Normal functions. */
2312 new_sublist
->fn_field
.is_const
= 0;
2313 new_sublist
->fn_field
.is_volatile
= 0;
2316 case 'B': /* `const' member functions. */
2317 new_sublist
->fn_field
.is_const
= 1;
2318 new_sublist
->fn_field
.is_volatile
= 0;
2321 case 'C': /* `volatile' member function. */
2322 new_sublist
->fn_field
.is_const
= 0;
2323 new_sublist
->fn_field
.is_volatile
= 1;
2326 case 'D': /* `const volatile' member function. */
2327 new_sublist
->fn_field
.is_const
= 1;
2328 new_sublist
->fn_field
.is_volatile
= 1;
2331 case '*': /* File compiled with g++ version 1 -- no info */
2336 complaint (&symfile_complaints
,
2337 _("const/volatile indicator missing, got '%c'"), **pp
);
2346 /* virtual member function, followed by index.
2347 The sign bit is set to distinguish pointers-to-methods
2348 from virtual function indicies. Since the array is
2349 in words, the quantity must be shifted left by 1
2350 on 16 bit machine, and by 2 on 32 bit machine, forcing
2351 the sign bit out, and usable as a valid index into
2352 the array. Remove the sign bit here. */
2353 new_sublist
->fn_field
.voffset
=
2354 (0x7fffffff & read_huge_number (pp
, ';', &nbits
, 0)) + 2;
2358 STABS_CONTINUE (pp
, objfile
);
2359 if (**pp
== ';' || **pp
== '\0')
2361 /* Must be g++ version 1. */
2362 new_sublist
->fn_field
.fcontext
= 0;
2366 /* Figure out from whence this virtual function came.
2367 It may belong to virtual function table of
2368 one of its baseclasses. */
2369 look_ahead_type
= read_type (pp
, objfile
);
2372 /* g++ version 1 overloaded methods. */
2376 new_sublist
->fn_field
.fcontext
= look_ahead_type
;
2385 look_ahead_type
= NULL
;
2391 /* static member function. */
2393 int slen
= strlen (main_fn_name
);
2395 new_sublist
->fn_field
.voffset
= VOFFSET_STATIC
;
2397 /* For static member functions, we can't tell if they
2398 are stubbed, as they are put out as functions, and not as
2400 GCC v2 emits the fully mangled name if
2401 dbxout.c:flag_minimal_debug is not set, so we have to
2402 detect a fully mangled physname here and set is_stub
2403 accordingly. Fully mangled physnames in v2 start with
2404 the member function name, followed by two underscores.
2405 GCC v3 currently always emits stubbed member functions,
2406 but with fully mangled physnames, which start with _Z. */
2407 if (!(strncmp (new_sublist
->fn_field
.physname
,
2408 main_fn_name
, slen
) == 0
2409 && new_sublist
->fn_field
.physname
[slen
] == '_'
2410 && new_sublist
->fn_field
.physname
[slen
+ 1] == '_'))
2412 new_sublist
->fn_field
.is_stub
= 1;
2419 complaint (&symfile_complaints
,
2420 _("member function type missing, got '%c'"), (*pp
)[-1]);
2421 /* Fall through into normal member function. */
2424 /* normal member function. */
2425 new_sublist
->fn_field
.voffset
= 0;
2426 new_sublist
->fn_field
.fcontext
= 0;
2430 new_sublist
->next
= sublist
;
2431 sublist
= new_sublist
;
2433 STABS_CONTINUE (pp
, objfile
);
2435 while (**pp
!= ';' && **pp
!= '\0');
2438 STABS_CONTINUE (pp
, objfile
);
2440 /* Skip GCC 3.X member functions which are duplicates of the callable
2441 constructor/destructor. */
2442 if (strcmp_iw (main_fn_name
, "__base_ctor ") == 0
2443 || strcmp_iw (main_fn_name
, "__base_dtor ") == 0
2444 || strcmp (main_fn_name
, "__deleting_dtor") == 0)
2446 xfree (main_fn_name
);
2451 int has_destructor
= 0, has_other
= 0;
2453 struct next_fnfield
*tmp_sublist
;
2455 /* Various versions of GCC emit various mostly-useless
2456 strings in the name field for special member functions.
2458 For stub methods, we need to defer correcting the name
2459 until we are ready to unstub the method, because the current
2460 name string is used by gdb_mangle_name. The only stub methods
2461 of concern here are GNU v2 operators; other methods have their
2462 names correct (see caveat below).
2464 For non-stub methods, in GNU v3, we have a complete physname.
2465 Therefore we can safely correct the name now. This primarily
2466 affects constructors and destructors, whose name will be
2467 __comp_ctor or __comp_dtor instead of Foo or ~Foo. Cast
2468 operators will also have incorrect names; for instance,
2469 "operator int" will be named "operator i" (i.e. the type is
2472 For non-stub methods in GNU v2, we have no easy way to
2473 know if we have a complete physname or not. For most
2474 methods the result depends on the platform (if CPLUS_MARKER
2475 can be `$' or `.', it will use minimal debug information, or
2476 otherwise the full physname will be included).
2478 Rather than dealing with this, we take a different approach.
2479 For v3 mangled names, we can use the full physname; for v2,
2480 we use cplus_demangle_opname (which is actually v2 specific),
2481 because the only interesting names are all operators - once again
2482 barring the caveat below. Skip this process if any method in the
2483 group is a stub, to prevent our fouling up the workings of
2486 The caveat: GCC 2.95.x (and earlier?) put constructors and
2487 destructors in the same method group. We need to split this
2488 into two groups, because they should have different names.
2489 So for each method group we check whether it contains both
2490 routines whose physname appears to be a destructor (the physnames
2491 for and destructors are always provided, due to quirks in v2
2492 mangling) and routines whose physname does not appear to be a
2493 destructor. If so then we break up the list into two halves.
2494 Even if the constructors and destructors aren't in the same group
2495 the destructor will still lack the leading tilde, so that also
2498 So, to summarize what we expect and handle here:
2500 Given Given Real Real Action
2501 method name physname physname method name
2503 __opi [none] __opi__3Foo operator int opname
2505 Foo _._3Foo _._3Foo ~Foo separate and
2507 operator i _ZN3FoocviEv _ZN3FoocviEv operator int demangle
2508 __comp_ctor _ZN3FooC1ERKS_ _ZN3FooC1ERKS_ Foo demangle
2511 tmp_sublist
= sublist
;
2512 while (tmp_sublist
!= NULL
)
2514 if (tmp_sublist
->fn_field
.is_stub
)
2516 if (tmp_sublist
->fn_field
.physname
[0] == '_'
2517 && tmp_sublist
->fn_field
.physname
[1] == 'Z')
2520 if (is_destructor_name (tmp_sublist
->fn_field
.physname
))
2525 tmp_sublist
= tmp_sublist
->next
;
2528 if (has_destructor
&& has_other
)
2530 struct next_fnfieldlist
*destr_fnlist
;
2531 struct next_fnfield
*last_sublist
;
2533 /* Create a new fn_fieldlist for the destructors. */
2535 destr_fnlist
= (struct next_fnfieldlist
*)
2536 xmalloc (sizeof (struct next_fnfieldlist
));
2537 make_cleanup (xfree
, destr_fnlist
);
2538 memset (destr_fnlist
, 0, sizeof (struct next_fnfieldlist
));
2539 destr_fnlist
->fn_fieldlist
.name
2540 = obconcat (&objfile
->objfile_obstack
, "", "~",
2541 new_fnlist
->fn_fieldlist
.name
);
2543 destr_fnlist
->fn_fieldlist
.fn_fields
= (struct fn_field
*)
2544 obstack_alloc (&objfile
->objfile_obstack
,
2545 sizeof (struct fn_field
) * has_destructor
);
2546 memset (destr_fnlist
->fn_fieldlist
.fn_fields
, 0,
2547 sizeof (struct fn_field
) * has_destructor
);
2548 tmp_sublist
= sublist
;
2549 last_sublist
= NULL
;
2551 while (tmp_sublist
!= NULL
)
2553 if (!is_destructor_name (tmp_sublist
->fn_field
.physname
))
2555 tmp_sublist
= tmp_sublist
->next
;
2559 destr_fnlist
->fn_fieldlist
.fn_fields
[i
++]
2560 = tmp_sublist
->fn_field
;
2562 last_sublist
->next
= tmp_sublist
->next
;
2564 sublist
= tmp_sublist
->next
;
2565 last_sublist
= tmp_sublist
;
2566 tmp_sublist
= tmp_sublist
->next
;
2569 destr_fnlist
->fn_fieldlist
.length
= has_destructor
;
2570 destr_fnlist
->next
= fip
->fnlist
;
2571 fip
->fnlist
= destr_fnlist
;
2573 total_length
+= has_destructor
;
2574 length
-= has_destructor
;
2578 /* v3 mangling prevents the use of abbreviated physnames,
2579 so we can do this here. There are stubbed methods in v3
2581 - in -gstabs instead of -gstabs+
2582 - or for static methods, which are output as a function type
2583 instead of a method type. */
2585 update_method_name_from_physname (&new_fnlist
->fn_fieldlist
.name
,
2586 sublist
->fn_field
.physname
);
2588 else if (has_destructor
&& new_fnlist
->fn_fieldlist
.name
[0] != '~')
2590 new_fnlist
->fn_fieldlist
.name
=
2591 concat ("~", main_fn_name
, (char *)NULL
);
2592 xfree (main_fn_name
);
2596 char dem_opname
[256];
2598 ret
= cplus_demangle_opname (new_fnlist
->fn_fieldlist
.name
,
2599 dem_opname
, DMGL_ANSI
);
2601 ret
= cplus_demangle_opname (new_fnlist
->fn_fieldlist
.name
,
2604 new_fnlist
->fn_fieldlist
.name
2605 = obsavestring (dem_opname
, strlen (dem_opname
),
2606 &objfile
->objfile_obstack
);
2609 new_fnlist
->fn_fieldlist
.fn_fields
= (struct fn_field
*)
2610 obstack_alloc (&objfile
->objfile_obstack
,
2611 sizeof (struct fn_field
) * length
);
2612 memset (new_fnlist
->fn_fieldlist
.fn_fields
, 0,
2613 sizeof (struct fn_field
) * length
);
2614 for (i
= length
; (i
--, sublist
); sublist
= sublist
->next
)
2616 new_fnlist
->fn_fieldlist
.fn_fields
[i
] = sublist
->fn_field
;
2619 new_fnlist
->fn_fieldlist
.length
= length
;
2620 new_fnlist
->next
= fip
->fnlist
;
2621 fip
->fnlist
= new_fnlist
;
2623 total_length
+= length
;
2629 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
2630 TYPE_FN_FIELDLISTS (type
) = (struct fn_fieldlist
*)
2631 TYPE_ALLOC (type
, sizeof (struct fn_fieldlist
) * nfn_fields
);
2632 memset (TYPE_FN_FIELDLISTS (type
), 0,
2633 sizeof (struct fn_fieldlist
) * nfn_fields
);
2634 TYPE_NFN_FIELDS (type
) = nfn_fields
;
2635 TYPE_NFN_FIELDS_TOTAL (type
) = total_length
;
2641 /* Special GNU C++ name.
2643 Returns 1 for success, 0 for failure. "failure" means that we can't
2644 keep parsing and it's time for error_type(). */
2647 read_cpp_abbrev (struct field_info
*fip
, char **pp
, struct type
*type
,
2648 struct objfile
*objfile
)
2653 struct type
*context
;
2663 /* At this point, *pp points to something like "22:23=*22...",
2664 where the type number before the ':' is the "context" and
2665 everything after is a regular type definition. Lookup the
2666 type, find it's name, and construct the field name. */
2668 context
= read_type (pp
, objfile
);
2672 case 'f': /* $vf -- a virtual function table pointer */
2673 name
= type_name_no_tag (context
);
2678 fip
->list
->field
.name
=
2679 obconcat (&objfile
->objfile_obstack
, vptr_name
, name
, "");
2682 case 'b': /* $vb -- a virtual bsomethingorother */
2683 name
= type_name_no_tag (context
);
2686 complaint (&symfile_complaints
,
2687 _("C++ abbreviated type name unknown at symtab pos %d"),
2691 fip
->list
->field
.name
=
2692 obconcat (&objfile
->objfile_obstack
, vb_name
, name
, "");
2696 invalid_cpp_abbrev_complaint (*pp
);
2697 fip
->list
->field
.name
=
2698 obconcat (&objfile
->objfile_obstack
,
2699 "INVALID_CPLUSPLUS_ABBREV", "", "");
2703 /* At this point, *pp points to the ':'. Skip it and read the
2709 invalid_cpp_abbrev_complaint (*pp
);
2712 fip
->list
->field
.type
= read_type (pp
, objfile
);
2714 (*pp
)++; /* Skip the comma. */
2720 FIELD_BITPOS (fip
->list
->field
) = read_huge_number (pp
, ';', &nbits
,
2725 /* This field is unpacked. */
2726 FIELD_BITSIZE (fip
->list
->field
) = 0;
2727 fip
->list
->visibility
= VISIBILITY_PRIVATE
;
2731 invalid_cpp_abbrev_complaint (*pp
);
2732 /* We have no idea what syntax an unrecognized abbrev would have, so
2733 better return 0. If we returned 1, we would need to at least advance
2734 *pp to avoid an infinite loop. */
2741 read_one_struct_field (struct field_info
*fip
, char **pp
, char *p
,
2742 struct type
*type
, struct objfile
*objfile
)
2744 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
2746 fip
->list
->field
.name
=
2747 obsavestring (*pp
, p
- *pp
, &objfile
->objfile_obstack
);
2750 /* This means we have a visibility for a field coming. */
2754 fip
->list
->visibility
= *(*pp
)++;
2758 /* normal dbx-style format, no explicit visibility */
2759 fip
->list
->visibility
= VISIBILITY_PUBLIC
;
2762 fip
->list
->field
.type
= read_type (pp
, objfile
);
2767 /* Possible future hook for nested types. */
2770 fip
->list
->field
.bitpos
= (long) -2; /* nested type */
2780 /* Static class member. */
2781 SET_FIELD_PHYSNAME (fip
->list
->field
, savestring (*pp
, p
- *pp
));
2785 else if (**pp
!= ',')
2787 /* Bad structure-type format. */
2788 stabs_general_complaint ("bad structure-type format");
2792 (*pp
)++; /* Skip the comma. */
2796 FIELD_BITPOS (fip
->list
->field
) = read_huge_number (pp
, ',', &nbits
, 0);
2799 stabs_general_complaint ("bad structure-type format");
2802 FIELD_BITSIZE (fip
->list
->field
) = read_huge_number (pp
, ';', &nbits
, 0);
2805 stabs_general_complaint ("bad structure-type format");
2810 if (FIELD_BITPOS (fip
->list
->field
) == 0
2811 && FIELD_BITSIZE (fip
->list
->field
) == 0)
2813 /* This can happen in two cases: (1) at least for gcc 2.4.5 or so,
2814 it is a field which has been optimized out. The correct stab for
2815 this case is to use VISIBILITY_IGNORE, but that is a recent
2816 invention. (2) It is a 0-size array. For example
2817 union { int num; char str[0]; } foo. Printing _("<no value>" for
2818 str in "p foo" is OK, since foo.str (and thus foo.str[3])
2819 will continue to work, and a 0-size array as a whole doesn't
2820 have any contents to print.
2822 I suspect this probably could also happen with gcc -gstabs (not
2823 -gstabs+) for static fields, and perhaps other C++ extensions.
2824 Hopefully few people use -gstabs with gdb, since it is intended
2825 for dbx compatibility. */
2827 /* Ignore this field. */
2828 fip
->list
->visibility
= VISIBILITY_IGNORE
;
2832 /* Detect an unpacked field and mark it as such.
2833 dbx gives a bit size for all fields.
2834 Note that forward refs cannot be packed,
2835 and treat enums as if they had the width of ints. */
2837 struct type
*field_type
= check_typedef (FIELD_TYPE (fip
->list
->field
));
2839 if (TYPE_CODE (field_type
) != TYPE_CODE_INT
2840 && TYPE_CODE (field_type
) != TYPE_CODE_RANGE
2841 && TYPE_CODE (field_type
) != TYPE_CODE_BOOL
2842 && TYPE_CODE (field_type
) != TYPE_CODE_ENUM
)
2844 FIELD_BITSIZE (fip
->list
->field
) = 0;
2846 if ((FIELD_BITSIZE (fip
->list
->field
)
2847 == TARGET_CHAR_BIT
* TYPE_LENGTH (field_type
)
2848 || (TYPE_CODE (field_type
) == TYPE_CODE_ENUM
2849 && FIELD_BITSIZE (fip
->list
->field
)
2850 == gdbarch_int_bit (gdbarch
))
2853 FIELD_BITPOS (fip
->list
->field
) % 8 == 0)
2855 FIELD_BITSIZE (fip
->list
->field
) = 0;
2861 /* Read struct or class data fields. They have the form:
2863 NAME : [VISIBILITY] TYPENUM , BITPOS , BITSIZE ;
2865 At the end, we see a semicolon instead of a field.
2867 In C++, this may wind up being NAME:?TYPENUM:PHYSNAME; for
2870 The optional VISIBILITY is one of:
2872 '/0' (VISIBILITY_PRIVATE)
2873 '/1' (VISIBILITY_PROTECTED)
2874 '/2' (VISIBILITY_PUBLIC)
2875 '/9' (VISIBILITY_IGNORE)
2877 or nothing, for C style fields with public visibility.
2879 Returns 1 for success, 0 for failure. */
2882 read_struct_fields (struct field_info
*fip
, char **pp
, struct type
*type
,
2883 struct objfile
*objfile
)
2886 struct nextfield
*new;
2888 /* We better set p right now, in case there are no fields at all... */
2892 /* Read each data member type until we find the terminating ';' at the end of
2893 the data member list, or break for some other reason such as finding the
2894 start of the member function list. */
2895 /* Stab string for structure/union does not end with two ';' in
2896 SUN C compiler 5.3 i.e. F6U2, hence check for end of string. */
2898 while (**pp
!= ';' && **pp
!= '\0')
2900 STABS_CONTINUE (pp
, objfile
);
2901 /* Get space to record the next field's data. */
2902 new = (struct nextfield
*) xmalloc (sizeof (struct nextfield
));
2903 make_cleanup (xfree
, new);
2904 memset (new, 0, sizeof (struct nextfield
));
2905 new->next
= fip
->list
;
2908 /* Get the field name. */
2911 /* If is starts with CPLUS_MARKER it is a special abbreviation,
2912 unless the CPLUS_MARKER is followed by an underscore, in
2913 which case it is just the name of an anonymous type, which we
2914 should handle like any other type name. */
2916 if (is_cplus_marker (p
[0]) && p
[1] != '_')
2918 if (!read_cpp_abbrev (fip
, pp
, type
, objfile
))
2923 /* Look for the ':' that separates the field name from the field
2924 values. Data members are delimited by a single ':', while member
2925 functions are delimited by a pair of ':'s. When we hit the member
2926 functions (if any), terminate scan loop and return. */
2928 while (*p
!= ':' && *p
!= '\0')
2935 /* Check to see if we have hit the member functions yet. */
2940 read_one_struct_field (fip
, pp
, p
, type
, objfile
);
2942 if (p
[0] == ':' && p
[1] == ':')
2944 /* (the deleted) chill the list of fields: the last entry (at
2945 the head) is a partially constructed entry which we now
2947 fip
->list
= fip
->list
->next
;
2952 /* The stabs for C++ derived classes contain baseclass information which
2953 is marked by a '!' character after the total size. This function is
2954 called when we encounter the baseclass marker, and slurps up all the
2955 baseclass information.
2957 Immediately following the '!' marker is the number of base classes that
2958 the class is derived from, followed by information for each base class.
2959 For each base class, there are two visibility specifiers, a bit offset
2960 to the base class information within the derived class, a reference to
2961 the type for the base class, and a terminating semicolon.
2963 A typical example, with two base classes, would be "!2,020,19;0264,21;".
2965 Baseclass information marker __________________|| | | | | | |
2966 Number of baseclasses __________________________| | | | | | |
2967 Visibility specifiers (2) ________________________| | | | | |
2968 Offset in bits from start of class _________________| | | | |
2969 Type number for base class ___________________________| | | |
2970 Visibility specifiers (2) _______________________________| | |
2971 Offset in bits from start of class ________________________| |
2972 Type number of base class ____________________________________|
2974 Return 1 for success, 0 for (error-type-inducing) failure. */
2980 read_baseclasses (struct field_info
*fip
, char **pp
, struct type
*type
,
2981 struct objfile
*objfile
)
2984 struct nextfield
*new;
2992 /* Skip the '!' baseclass information marker. */
2996 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
2999 TYPE_N_BASECLASSES (type
) = read_huge_number (pp
, ',', &nbits
, 0);
3005 /* Some stupid compilers have trouble with the following, so break
3006 it up into simpler expressions. */
3007 TYPE_FIELD_VIRTUAL_BITS (type
) = (B_TYPE
*)
3008 TYPE_ALLOC (type
, B_BYTES (TYPE_N_BASECLASSES (type
)));
3011 int num_bytes
= B_BYTES (TYPE_N_BASECLASSES (type
));
3014 pointer
= (char *) TYPE_ALLOC (type
, num_bytes
);
3015 TYPE_FIELD_VIRTUAL_BITS (type
) = (B_TYPE
*) pointer
;
3019 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type
), TYPE_N_BASECLASSES (type
));
3021 for (i
= 0; i
< TYPE_N_BASECLASSES (type
); i
++)
3023 new = (struct nextfield
*) xmalloc (sizeof (struct nextfield
));
3024 make_cleanup (xfree
, new);
3025 memset (new, 0, sizeof (struct nextfield
));
3026 new->next
= fip
->list
;
3028 FIELD_BITSIZE (new->field
) = 0; /* this should be an unpacked field! */
3030 STABS_CONTINUE (pp
, objfile
);
3034 /* Nothing to do. */
3037 SET_TYPE_FIELD_VIRTUAL (type
, i
);
3040 /* Unknown character. Complain and treat it as non-virtual. */
3042 complaint (&symfile_complaints
,
3043 _("Unknown virtual character `%c' for baseclass"), **pp
);
3048 new->visibility
= *(*pp
)++;
3049 switch (new->visibility
)
3051 case VISIBILITY_PRIVATE
:
3052 case VISIBILITY_PROTECTED
:
3053 case VISIBILITY_PUBLIC
:
3056 /* Bad visibility format. Complain and treat it as
3059 complaint (&symfile_complaints
,
3060 _("Unknown visibility `%c' for baseclass"),
3062 new->visibility
= VISIBILITY_PUBLIC
;
3069 /* The remaining value is the bit offset of the portion of the object
3070 corresponding to this baseclass. Always zero in the absence of
3071 multiple inheritance. */
3073 FIELD_BITPOS (new->field
) = read_huge_number (pp
, ',', &nbits
, 0);
3078 /* The last piece of baseclass information is the type of the
3079 base class. Read it, and remember it's type name as this
3082 new->field
.type
= read_type (pp
, objfile
);
3083 new->field
.name
= type_name_no_tag (new->field
.type
);
3085 /* skip trailing ';' and bump count of number of fields seen */
3094 /* The tail end of stabs for C++ classes that contain a virtual function
3095 pointer contains a tilde, a %, and a type number.
3096 The type number refers to the base class (possibly this class itself) which
3097 contains the vtable pointer for the current class.
3099 This function is called when we have parsed all the method declarations,
3100 so we can look for the vptr base class info. */
3103 read_tilde_fields (struct field_info
*fip
, char **pp
, struct type
*type
,
3104 struct objfile
*objfile
)
3108 STABS_CONTINUE (pp
, objfile
);
3110 /* If we are positioned at a ';', then skip it. */
3120 if (**pp
== '=' || **pp
== '+' || **pp
== '-')
3122 /* Obsolete flags that used to indicate the presence
3123 of constructors and/or destructors. */
3127 /* Read either a '%' or the final ';'. */
3128 if (*(*pp
)++ == '%')
3130 /* The next number is the type number of the base class
3131 (possibly our own class) which supplies the vtable for
3132 this class. Parse it out, and search that class to find
3133 its vtable pointer, and install those into TYPE_VPTR_BASETYPE
3134 and TYPE_VPTR_FIELDNO. */
3139 t
= read_type (pp
, objfile
);
3141 while (*p
!= '\0' && *p
!= ';')
3147 /* Premature end of symbol. */
3151 TYPE_VPTR_BASETYPE (type
) = t
;
3152 if (type
== t
) /* Our own class provides vtbl ptr */
3154 for (i
= TYPE_NFIELDS (t
) - 1;
3155 i
>= TYPE_N_BASECLASSES (t
);
3158 char *name
= TYPE_FIELD_NAME (t
, i
);
3159 if (!strncmp (name
, vptr_name
, sizeof (vptr_name
) - 2)
3160 && is_cplus_marker (name
[sizeof (vptr_name
) - 2]))
3162 TYPE_VPTR_FIELDNO (type
) = i
;
3166 /* Virtual function table field not found. */
3167 complaint (&symfile_complaints
,
3168 _("virtual function table pointer not found when defining class `%s'"),
3174 TYPE_VPTR_FIELDNO (type
) = TYPE_VPTR_FIELDNO (t
);
3185 attach_fn_fields_to_type (struct field_info
*fip
, struct type
*type
)
3189 for (n
= TYPE_NFN_FIELDS (type
);
3190 fip
->fnlist
!= NULL
;
3191 fip
->fnlist
= fip
->fnlist
->next
)
3193 --n
; /* Circumvent Sun3 compiler bug */
3194 TYPE_FN_FIELDLISTS (type
)[n
] = fip
->fnlist
->fn_fieldlist
;
3199 /* Create the vector of fields, and record how big it is.
3200 We need this info to record proper virtual function table information
3201 for this class's virtual functions. */
3204 attach_fields_to_type (struct field_info
*fip
, struct type
*type
,
3205 struct objfile
*objfile
)
3208 int non_public_fields
= 0;
3209 struct nextfield
*scan
;
3211 /* Count up the number of fields that we have, as well as taking note of
3212 whether or not there are any non-public fields, which requires us to
3213 allocate and build the private_field_bits and protected_field_bits
3216 for (scan
= fip
->list
; scan
!= NULL
; scan
= scan
->next
)
3219 if (scan
->visibility
!= VISIBILITY_PUBLIC
)
3221 non_public_fields
++;
3225 /* Now we know how many fields there are, and whether or not there are any
3226 non-public fields. Record the field count, allocate space for the
3227 array of fields, and create blank visibility bitfields if necessary. */
3229 TYPE_NFIELDS (type
) = nfields
;
3230 TYPE_FIELDS (type
) = (struct field
*)
3231 TYPE_ALLOC (type
, sizeof (struct field
) * nfields
);
3232 memset (TYPE_FIELDS (type
), 0, sizeof (struct field
) * nfields
);
3234 if (non_public_fields
)
3236 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
3238 TYPE_FIELD_PRIVATE_BITS (type
) =
3239 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
3240 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type
), nfields
);
3242 TYPE_FIELD_PROTECTED_BITS (type
) =
3243 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
3244 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type
), nfields
);
3246 TYPE_FIELD_IGNORE_BITS (type
) =
3247 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
3248 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type
), nfields
);
3251 /* Copy the saved-up fields into the field vector. Start from the head
3252 of the list, adding to the tail of the field array, so that they end
3253 up in the same order in the array in which they were added to the list. */
3255 while (nfields
-- > 0)
3257 TYPE_FIELD (type
, nfields
) = fip
->list
->field
;
3258 switch (fip
->list
->visibility
)
3260 case VISIBILITY_PRIVATE
:
3261 SET_TYPE_FIELD_PRIVATE (type
, nfields
);
3264 case VISIBILITY_PROTECTED
:
3265 SET_TYPE_FIELD_PROTECTED (type
, nfields
);
3268 case VISIBILITY_IGNORE
:
3269 SET_TYPE_FIELD_IGNORE (type
, nfields
);
3272 case VISIBILITY_PUBLIC
:
3276 /* Unknown visibility. Complain and treat it as public. */
3278 complaint (&symfile_complaints
, _("Unknown visibility `%c' for field"),
3279 fip
->list
->visibility
);
3283 fip
->list
= fip
->list
->next
;
3289 /* Complain that the compiler has emitted more than one definition for the
3290 structure type TYPE. */
3292 complain_about_struct_wipeout (struct type
*type
)
3297 if (TYPE_TAG_NAME (type
))
3299 name
= TYPE_TAG_NAME (type
);
3300 switch (TYPE_CODE (type
))
3302 case TYPE_CODE_STRUCT
: kind
= "struct "; break;
3303 case TYPE_CODE_UNION
: kind
= "union "; break;
3304 case TYPE_CODE_ENUM
: kind
= "enum "; break;
3308 else if (TYPE_NAME (type
))
3310 name
= TYPE_NAME (type
);
3319 complaint (&symfile_complaints
,
3320 _("struct/union type gets multiply defined: %s%s"), kind
, name
);
3324 /* Read the description of a structure (or union type) and return an object
3325 describing the type.
3327 PP points to a character pointer that points to the next unconsumed token
3328 in the the stabs string. For example, given stabs "A:T4=s4a:1,0,32;;",
3329 *PP will point to "4a:1,0,32;;".
3331 TYPE points to an incomplete type that needs to be filled in.
3333 OBJFILE points to the current objfile from which the stabs information is
3334 being read. (Note that it is redundant in that TYPE also contains a pointer
3335 to this same objfile, so it might be a good idea to eliminate it. FIXME).
3338 static struct type
*
3339 read_struct_type (char **pp
, struct type
*type
, enum type_code type_code
,
3340 struct objfile
*objfile
)
3342 struct cleanup
*back_to
;
3343 struct field_info fi
;
3348 /* When describing struct/union/class types in stabs, G++ always drops
3349 all qualifications from the name. So if you've got:
3350 struct A { ... struct B { ... }; ... };
3351 then G++ will emit stabs for `struct A::B' that call it simply
3352 `struct B'. Obviously, if you've got a real top-level definition for
3353 `struct B', or other nested definitions, this is going to cause
3356 Obviously, GDB can't fix this by itself, but it can at least avoid
3357 scribbling on existing structure type objects when new definitions
3359 if (! (TYPE_CODE (type
) == TYPE_CODE_UNDEF
3360 || TYPE_STUB (type
)))
3362 complain_about_struct_wipeout (type
);
3364 /* It's probably best to return the type unchanged. */
3368 back_to
= make_cleanup (null_cleanup
, 0);
3370 INIT_CPLUS_SPECIFIC (type
);
3371 TYPE_CODE (type
) = type_code
;
3372 TYPE_STUB (type
) = 0;
3374 /* First comes the total size in bytes. */
3378 TYPE_LENGTH (type
) = read_huge_number (pp
, 0, &nbits
, 0);
3380 return error_type (pp
, objfile
);
3383 /* Now read the baseclasses, if any, read the regular C struct or C++
3384 class member fields, attach the fields to the type, read the C++
3385 member functions, attach them to the type, and then read any tilde
3386 field (baseclass specifier for the class holding the main vtable). */
3388 if (!read_baseclasses (&fi
, pp
, type
, objfile
)
3389 || !read_struct_fields (&fi
, pp
, type
, objfile
)
3390 || !attach_fields_to_type (&fi
, type
, objfile
)
3391 || !read_member_functions (&fi
, pp
, type
, objfile
)
3392 || !attach_fn_fields_to_type (&fi
, type
)
3393 || !read_tilde_fields (&fi
, pp
, type
, objfile
))
3395 type
= error_type (pp
, objfile
);
3398 do_cleanups (back_to
);
3402 /* Read a definition of an array type,
3403 and create and return a suitable type object.
3404 Also creates a range type which represents the bounds of that
3407 static struct type
*
3408 read_array_type (char **pp
, struct type
*type
,
3409 struct objfile
*objfile
)
3411 struct type
*index_type
, *element_type
, *range_type
;
3416 /* Format of an array type:
3417 "ar<index type>;lower;upper;<array_contents_type>".
3418 OS9000: "arlower,upper;<array_contents_type>".
3420 Fortran adjustable arrays use Adigits or Tdigits for lower or upper;
3421 for these, produce a type like float[][]. */
3424 index_type
= read_type (pp
, objfile
);
3426 /* Improper format of array type decl. */
3427 return error_type (pp
, objfile
);
3431 if (!(**pp
>= '0' && **pp
<= '9') && **pp
!= '-')
3436 lower
= read_huge_number (pp
, ';', &nbits
, 0);
3439 return error_type (pp
, objfile
);
3441 if (!(**pp
>= '0' && **pp
<= '9') && **pp
!= '-')
3446 upper
= read_huge_number (pp
, ';', &nbits
, 0);
3448 return error_type (pp
, objfile
);
3450 element_type
= read_type (pp
, objfile
);
3459 create_range_type ((struct type
*) NULL
, index_type
, lower
, upper
);
3460 type
= create_array_type (type
, element_type
, range_type
);
3466 /* Read a definition of an enumeration type,
3467 and create and return a suitable type object.
3468 Also defines the symbols that represent the values of the type. */
3470 static struct type
*
3471 read_enum_type (char **pp
, struct type
*type
,
3472 struct objfile
*objfile
)
3474 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
3480 struct pending
**symlist
;
3481 struct pending
*osyms
, *syms
;
3484 int unsigned_enum
= 1;
3487 /* FIXME! The stabs produced by Sun CC merrily define things that ought
3488 to be file-scope, between N_FN entries, using N_LSYM. What's a mother
3489 to do? For now, force all enum values to file scope. */
3490 if (within_function
)
3491 symlist
= &local_symbols
;
3494 symlist
= &file_symbols
;
3496 o_nsyms
= osyms
? osyms
->nsyms
: 0;
3498 /* The aix4 compiler emits an extra field before the enum members;
3499 my guess is it's a type of some sort. Just ignore it. */
3502 /* Skip over the type. */
3506 /* Skip over the colon. */
3510 /* Read the value-names and their values.
3511 The input syntax is NAME:VALUE,NAME:VALUE, and so on.
3512 A semicolon or comma instead of a NAME means the end. */
3513 while (**pp
&& **pp
!= ';' && **pp
!= ',')
3515 STABS_CONTINUE (pp
, objfile
);
3519 name
= obsavestring (*pp
, p
- *pp
, &objfile
->objfile_obstack
);
3521 n
= read_huge_number (pp
, ',', &nbits
, 0);
3523 return error_type (pp
, objfile
);
3525 sym
= (struct symbol
*)
3526 obstack_alloc (&objfile
->objfile_obstack
, sizeof (struct symbol
));
3527 memset (sym
, 0, sizeof (struct symbol
));
3528 SYMBOL_SET_LINKAGE_NAME (sym
, name
);
3529 SYMBOL_LANGUAGE (sym
) = current_subfile
->language
;
3530 SYMBOL_CLASS (sym
) = LOC_CONST
;
3531 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
3532 SYMBOL_VALUE (sym
) = n
;
3535 add_symbol_to_list (sym
, symlist
);
3540 (*pp
)++; /* Skip the semicolon. */
3542 /* Now fill in the fields of the type-structure. */
3544 TYPE_LENGTH (type
) = gdbarch_int_bit (gdbarch
) / HOST_CHAR_BIT
;
3545 TYPE_CODE (type
) = TYPE_CODE_ENUM
;
3546 TYPE_STUB (type
) = 0;
3548 TYPE_UNSIGNED (type
) = 1;
3549 TYPE_NFIELDS (type
) = nsyms
;
3550 TYPE_FIELDS (type
) = (struct field
*)
3551 TYPE_ALLOC (type
, sizeof (struct field
) * nsyms
);
3552 memset (TYPE_FIELDS (type
), 0, sizeof (struct field
) * nsyms
);
3554 /* Find the symbols for the values and put them into the type.
3555 The symbols can be found in the symlist that we put them on
3556 to cause them to be defined. osyms contains the old value
3557 of that symlist; everything up to there was defined by us. */
3558 /* Note that we preserve the order of the enum constants, so
3559 that in something like "enum {FOO, LAST_THING=FOO}" we print
3560 FOO, not LAST_THING. */
3562 for (syms
= *symlist
, n
= nsyms
- 1; syms
; syms
= syms
->next
)
3564 int last
= syms
== osyms
? o_nsyms
: 0;
3565 int j
= syms
->nsyms
;
3566 for (; --j
>= last
; --n
)
3568 struct symbol
*xsym
= syms
->symbol
[j
];
3569 SYMBOL_TYPE (xsym
) = type
;
3570 TYPE_FIELD_NAME (type
, n
) = SYMBOL_LINKAGE_NAME (xsym
);
3571 TYPE_FIELD_BITPOS (type
, n
) = SYMBOL_VALUE (xsym
);
3572 TYPE_FIELD_BITSIZE (type
, n
) = 0;
3581 /* Sun's ACC uses a somewhat saner method for specifying the builtin
3582 typedefs in every file (for int, long, etc):
3584 type = b <signed> <width> <format type>; <offset>; <nbits>
3586 optional format type = c or b for char or boolean.
3587 offset = offset from high order bit to start bit of type.
3588 width is # bytes in object of this type, nbits is # bits in type.
3590 The width/offset stuff appears to be for small objects stored in
3591 larger ones (e.g. `shorts' in `int' registers). We ignore it for now,
3594 static struct type
*
3595 read_sun_builtin_type (char **pp
, int typenums
[2], struct objfile
*objfile
)
3600 enum type_code code
= TYPE_CODE_INT
;
3611 return error_type (pp
, objfile
);
3615 /* For some odd reason, all forms of char put a c here. This is strange
3616 because no other type has this honor. We can safely ignore this because
3617 we actually determine 'char'acterness by the number of bits specified in
3619 Boolean forms, e.g Fortran logical*X, put a b here. */
3623 else if (**pp
== 'b')
3625 code
= TYPE_CODE_BOOL
;
3629 /* The first number appears to be the number of bytes occupied
3630 by this type, except that unsigned short is 4 instead of 2.
3631 Since this information is redundant with the third number,
3632 we will ignore it. */
3633 read_huge_number (pp
, ';', &nbits
, 0);
3635 return error_type (pp
, objfile
);
3637 /* The second number is always 0, so ignore it too. */
3638 read_huge_number (pp
, ';', &nbits
, 0);
3640 return error_type (pp
, objfile
);
3642 /* The third number is the number of bits for this type. */
3643 type_bits
= read_huge_number (pp
, 0, &nbits
, 0);
3645 return error_type (pp
, objfile
);
3646 /* The type *should* end with a semicolon. If it are embedded
3647 in a larger type the semicolon may be the only way to know where
3648 the type ends. If this type is at the end of the stabstring we
3649 can deal with the omitted semicolon (but we don't have to like
3650 it). Don't bother to complain(), Sun's compiler omits the semicolon
3656 return init_type (TYPE_CODE_VOID
, 1,
3657 signed_type
? 0 : TYPE_FLAG_UNSIGNED
, (char *) NULL
,
3660 return init_type (code
,
3661 type_bits
/ TARGET_CHAR_BIT
,
3662 signed_type
? 0 : TYPE_FLAG_UNSIGNED
, (char *) NULL
,
3666 static struct type
*
3667 read_sun_floating_type (char **pp
, int typenums
[2], struct objfile
*objfile
)
3672 struct type
*rettype
;
3674 /* The first number has more details about the type, for example
3676 details
= read_huge_number (pp
, ';', &nbits
, 0);
3678 return error_type (pp
, objfile
);
3680 /* The second number is the number of bytes occupied by this type */
3681 nbytes
= read_huge_number (pp
, ';', &nbits
, 0);
3683 return error_type (pp
, objfile
);
3685 if (details
== NF_COMPLEX
|| details
== NF_COMPLEX16
3686 || details
== NF_COMPLEX32
)
3688 rettype
= init_type (TYPE_CODE_COMPLEX
, nbytes
, 0, NULL
, objfile
);
3689 TYPE_TARGET_TYPE (rettype
)
3690 = init_type (TYPE_CODE_FLT
, nbytes
/ 2, 0, NULL
, objfile
);
3694 return init_type (TYPE_CODE_FLT
, nbytes
, 0, NULL
, objfile
);
3697 /* Read a number from the string pointed to by *PP.
3698 The value of *PP is advanced over the number.
3699 If END is nonzero, the character that ends the
3700 number must match END, or an error happens;
3701 and that character is skipped if it does match.
3702 If END is zero, *PP is left pointing to that character.
3704 If TWOS_COMPLEMENT_BITS is set to a strictly positive value and if
3705 the number is represented in an octal representation, assume that
3706 it is represented in a 2's complement representation with a size of
3707 TWOS_COMPLEMENT_BITS.
3709 If the number fits in a long, set *BITS to 0 and return the value.
3710 If not, set *BITS to be the number of bits in the number and return 0.
3712 If encounter garbage, set *BITS to -1 and return 0. */
3715 read_huge_number (char **pp
, int end
, int *bits
, int twos_complement_bits
)
3726 int twos_complement_representation
= 0;
3734 /* Leading zero means octal. GCC uses this to output values larger
3735 than an int (because that would be hard in decimal). */
3742 /* Skip extra zeros. */
3746 if (sign
> 0 && radix
== 8 && twos_complement_bits
> 0)
3748 /* Octal, possibly signed. Check if we have enough chars for a
3753 while ((c
= *p1
) >= '0' && c
< '8')
3757 if (len
> twos_complement_bits
/ 3
3758 || (twos_complement_bits
% 3 == 0 && len
== twos_complement_bits
/ 3))
3760 /* Ok, we have enough characters for a signed value, check
3761 for signness by testing if the sign bit is set. */
3762 sign_bit
= (twos_complement_bits
% 3 + 2) % 3;
3764 if (c
& (1 << sign_bit
))
3766 /* Definitely signed. */
3767 twos_complement_representation
= 1;
3773 upper_limit
= LONG_MAX
/ radix
;
3775 while ((c
= *p
++) >= '0' && c
< ('0' + radix
))
3777 if (n
<= upper_limit
)
3779 if (twos_complement_representation
)
3781 /* Octal, signed, twos complement representation. In
3782 this case, n is the corresponding absolute value. */
3785 long sn
= c
- '0' - ((2 * (c
- '0')) | (2 << sign_bit
));
3796 /* unsigned representation */
3798 n
+= c
- '0'; /* FIXME this overflows anyway */
3804 /* This depends on large values being output in octal, which is
3811 /* Ignore leading zeroes. */
3815 else if (c
== '2' || c
== '3')
3836 if (radix
== 8 && twos_complement_bits
> 0 && nbits
> twos_complement_bits
)
3838 /* We were supposed to parse a number with maximum
3839 TWOS_COMPLEMENT_BITS bits, but something went wrong. */
3850 /* Large decimal constants are an error (because it is hard to
3851 count how many bits are in them). */
3857 /* -0x7f is the same as 0x80. So deal with it by adding one to
3858 the number of bits. Two's complement represention octals
3859 can't have a '-' in front. */
3860 if (sign
== -1 && !twos_complement_representation
)
3871 /* It's *BITS which has the interesting information. */
3875 static struct type
*
3876 read_range_type (char **pp
, int typenums
[2], int type_size
,
3877 struct objfile
*objfile
)
3879 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
3880 char *orig_pp
= *pp
;
3885 struct type
*result_type
;
3886 struct type
*index_type
= NULL
;
3888 /* First comes a type we are a subrange of.
3889 In C it is usually 0, 1 or the type being defined. */
3890 if (read_type_number (pp
, rangenums
) != 0)
3891 return error_type (pp
, objfile
);
3892 self_subrange
= (rangenums
[0] == typenums
[0] &&
3893 rangenums
[1] == typenums
[1]);
3898 index_type
= read_type (pp
, objfile
);
3901 /* A semicolon should now follow; skip it. */
3905 /* The remaining two operands are usually lower and upper bounds
3906 of the range. But in some special cases they mean something else. */
3907 n2
= read_huge_number (pp
, ';', &n2bits
, type_size
);
3908 n3
= read_huge_number (pp
, ';', &n3bits
, type_size
);
3910 if (n2bits
== -1 || n3bits
== -1)
3911 return error_type (pp
, objfile
);
3914 goto handle_true_range
;
3916 /* If limits are huge, must be large integral type. */
3917 if (n2bits
!= 0 || n3bits
!= 0)
3919 char got_signed
= 0;
3920 char got_unsigned
= 0;
3921 /* Number of bits in the type. */
3924 /* If a type size attribute has been specified, the bounds of
3925 the range should fit in this size. If the lower bounds needs
3926 more bits than the upper bound, then the type is signed. */
3927 if (n2bits
<= type_size
&& n3bits
<= type_size
)
3929 if (n2bits
== type_size
&& n2bits
> n3bits
)
3935 /* Range from 0 to <large number> is an unsigned large integral type. */
3936 else if ((n2bits
== 0 && n2
== 0) && n3bits
!= 0)
3941 /* Range from <large number> to <large number>-1 is a large signed
3942 integral type. Take care of the case where <large number> doesn't
3943 fit in a long but <large number>-1 does. */
3944 else if ((n2bits
!= 0 && n3bits
!= 0 && n2bits
== n3bits
+ 1)
3945 || (n2bits
!= 0 && n3bits
== 0
3946 && (n2bits
== sizeof (long) * HOST_CHAR_BIT
)
3953 if (got_signed
|| got_unsigned
)
3955 return init_type (TYPE_CODE_INT
, nbits
/ TARGET_CHAR_BIT
,
3956 got_unsigned
? TYPE_FLAG_UNSIGNED
: 0, NULL
,
3960 return error_type (pp
, objfile
);
3963 /* A type defined as a subrange of itself, with bounds both 0, is void. */
3964 if (self_subrange
&& n2
== 0 && n3
== 0)
3965 return init_type (TYPE_CODE_VOID
, 1, 0, NULL
, objfile
);
3967 /* If n3 is zero and n2 is positive, we want a floating type, and n2
3968 is the width in bytes.
3970 Fortran programs appear to use this for complex types also. To
3971 distinguish between floats and complex, g77 (and others?) seem
3972 to use self-subranges for the complexes, and subranges of int for
3975 Also note that for complexes, g77 sets n2 to the size of one of
3976 the member floats, not the whole complex beast. My guess is that
3977 this was to work well with pre-COMPLEX versions of gdb. */
3979 if (n3
== 0 && n2
> 0)
3981 struct type
*float_type
3982 = init_type (TYPE_CODE_FLT
, n2
, 0, NULL
, objfile
);
3986 struct type
*complex_type
=
3987 init_type (TYPE_CODE_COMPLEX
, 2 * n2
, 0, NULL
, objfile
);
3988 TYPE_TARGET_TYPE (complex_type
) = float_type
;
3989 return complex_type
;
3995 /* If the upper bound is -1, it must really be an unsigned integral. */
3997 else if (n2
== 0 && n3
== -1)
3999 int bits
= type_size
;
4002 /* We don't know its size. It is unsigned int or unsigned
4003 long. GCC 2.3.3 uses this for long long too, but that is
4004 just a GDB 3.5 compatibility hack. */
4005 bits
= gdbarch_int_bit (gdbarch
);
4008 return init_type (TYPE_CODE_INT
, bits
/ TARGET_CHAR_BIT
,
4009 TYPE_FLAG_UNSIGNED
, NULL
, objfile
);
4012 /* Special case: char is defined (Who knows why) as a subrange of
4013 itself with range 0-127. */
4014 else if (self_subrange
&& n2
== 0 && n3
== 127)
4015 return init_type (TYPE_CODE_INT
, 1, TYPE_FLAG_NOSIGN
, NULL
, objfile
);
4017 /* We used to do this only for subrange of self or subrange of int. */
4020 /* -1 is used for the upper bound of (4 byte) "unsigned int" and
4021 "unsigned long", and we already checked for that,
4022 so don't need to test for it here. */
4025 /* n3 actually gives the size. */
4026 return init_type (TYPE_CODE_INT
, -n3
, TYPE_FLAG_UNSIGNED
,
4029 /* Is n3 == 2**(8n)-1 for some integer n? Then it's an
4030 unsigned n-byte integer. But do require n to be a power of
4031 two; we don't want 3- and 5-byte integers flying around. */
4037 for (bytes
= 0; (bits
& 0xff) == 0xff; bytes
++)
4040 && ((bytes
- 1) & bytes
) == 0) /* "bytes is a power of two" */
4041 return init_type (TYPE_CODE_INT
, bytes
, TYPE_FLAG_UNSIGNED
, NULL
,
4045 /* I think this is for Convex "long long". Since I don't know whether
4046 Convex sets self_subrange, I also accept that particular size regardless
4047 of self_subrange. */
4048 else if (n3
== 0 && n2
< 0
4050 || n2
== -gdbarch_long_long_bit
4051 (gdbarch
) / TARGET_CHAR_BIT
))
4052 return init_type (TYPE_CODE_INT
, -n2
, 0, NULL
, objfile
);
4053 else if (n2
== -n3
- 1)
4056 return init_type (TYPE_CODE_INT
, 1, 0, NULL
, objfile
);
4058 return init_type (TYPE_CODE_INT
, 2, 0, NULL
, objfile
);
4059 if (n3
== 0x7fffffff)
4060 return init_type (TYPE_CODE_INT
, 4, 0, NULL
, objfile
);
4063 /* We have a real range type on our hands. Allocate space and
4064 return a real pointer. */
4068 index_type
= builtin_type (gdbarch
)->builtin_int
;
4070 index_type
= *dbx_lookup_type (rangenums
);
4071 if (index_type
== NULL
)
4073 /* Does this actually ever happen? Is that why we are worrying
4074 about dealing with it rather than just calling error_type? */
4076 complaint (&symfile_complaints
,
4077 _("base type %d of range type is not defined"), rangenums
[1]);
4079 index_type
= builtin_type (gdbarch
)->builtin_int
;
4082 result_type
= create_range_type ((struct type
*) NULL
, index_type
, n2
, n3
);
4083 return (result_type
);
4086 /* Read in an argument list. This is a list of types, separated by commas
4087 and terminated with END. Return the list of types read in, or NULL
4088 if there is an error. */
4090 static struct field
*
4091 read_args (char **pp
, int end
, struct objfile
*objfile
, int *nargsp
,
4094 /* FIXME! Remove this arbitrary limit! */
4095 struct type
*types
[1024]; /* allow for fns of 1023 parameters */
4102 /* Invalid argument list: no ','. */
4105 STABS_CONTINUE (pp
, objfile
);
4106 types
[n
++] = read_type (pp
, objfile
);
4108 (*pp
)++; /* get past `end' (the ':' character) */
4110 if (TYPE_CODE (types
[n
- 1]) != TYPE_CODE_VOID
)
4118 rval
= (struct field
*) xmalloc (n
* sizeof (struct field
));
4119 memset (rval
, 0, n
* sizeof (struct field
));
4120 for (i
= 0; i
< n
; i
++)
4121 rval
[i
].type
= types
[i
];
4126 /* Common block handling. */
4128 /* List of symbols declared since the last BCOMM. This list is a tail
4129 of local_symbols. When ECOMM is seen, the symbols on the list
4130 are noted so their proper addresses can be filled in later,
4131 using the common block base address gotten from the assembler
4134 static struct pending
*common_block
;
4135 static int common_block_i
;
4137 /* Name of the current common block. We get it from the BCOMM instead of the
4138 ECOMM to match IBM documentation (even though IBM puts the name both places
4139 like everyone else). */
4140 static char *common_block_name
;
4142 /* Process a N_BCOMM symbol. The storage for NAME is not guaranteed
4143 to remain after this function returns. */
4146 common_block_start (char *name
, struct objfile
*objfile
)
4148 if (common_block_name
!= NULL
)
4150 complaint (&symfile_complaints
,
4151 _("Invalid symbol data: common block within common block"));
4153 common_block
= local_symbols
;
4154 common_block_i
= local_symbols
? local_symbols
->nsyms
: 0;
4155 common_block_name
= obsavestring (name
, strlen (name
),
4156 &objfile
->objfile_obstack
);
4159 /* Process a N_ECOMM symbol. */
4162 common_block_end (struct objfile
*objfile
)
4164 /* Symbols declared since the BCOMM are to have the common block
4165 start address added in when we know it. common_block and
4166 common_block_i point to the first symbol after the BCOMM in
4167 the local_symbols list; copy the list and hang it off the
4168 symbol for the common block name for later fixup. */
4171 struct pending
*new = 0;
4172 struct pending
*next
;
4175 if (common_block_name
== NULL
)
4177 complaint (&symfile_complaints
, _("ECOMM symbol unmatched by BCOMM"));
4181 sym
= (struct symbol
*)
4182 obstack_alloc (&objfile
->objfile_obstack
, sizeof (struct symbol
));
4183 memset (sym
, 0, sizeof (struct symbol
));
4184 /* Note: common_block_name already saved on objfile_obstack */
4185 SYMBOL_SET_LINKAGE_NAME (sym
, common_block_name
);
4186 SYMBOL_CLASS (sym
) = LOC_BLOCK
;
4188 /* Now we copy all the symbols which have been defined since the BCOMM. */
4190 /* Copy all the struct pendings before common_block. */
4191 for (next
= local_symbols
;
4192 next
!= NULL
&& next
!= common_block
;
4195 for (j
= 0; j
< next
->nsyms
; j
++)
4196 add_symbol_to_list (next
->symbol
[j
], &new);
4199 /* Copy however much of COMMON_BLOCK we need. If COMMON_BLOCK is
4200 NULL, it means copy all the local symbols (which we already did
4203 if (common_block
!= NULL
)
4204 for (j
= common_block_i
; j
< common_block
->nsyms
; j
++)
4205 add_symbol_to_list (common_block
->symbol
[j
], &new);
4207 SYMBOL_TYPE (sym
) = (struct type
*) new;
4209 /* Should we be putting local_symbols back to what it was?
4212 i
= hashname (SYMBOL_LINKAGE_NAME (sym
));
4213 SYMBOL_VALUE_CHAIN (sym
) = global_sym_chain
[i
];
4214 global_sym_chain
[i
] = sym
;
4215 common_block_name
= NULL
;
4218 /* Add a common block's start address to the offset of each symbol
4219 declared to be in it (by being between a BCOMM/ECOMM pair that uses
4220 the common block name). */
4223 fix_common_block (struct symbol
*sym
, int valu
)
4225 struct pending
*next
= (struct pending
*) SYMBOL_TYPE (sym
);
4226 for (; next
; next
= next
->next
)
4229 for (j
= next
->nsyms
- 1; j
>= 0; j
--)
4230 SYMBOL_VALUE_ADDRESS (next
->symbol
[j
]) += valu
;
4236 /* Add {TYPE, TYPENUMS} to the NONAME_UNDEFS vector.
4237 See add_undefined_type for more details. */
4240 add_undefined_type_noname (struct type
*type
, int typenums
[2])
4244 nat
.typenums
[0] = typenums
[0];
4245 nat
.typenums
[1] = typenums
[1];
4248 if (noname_undefs_length
== noname_undefs_allocated
)
4250 noname_undefs_allocated
*= 2;
4251 noname_undefs
= (struct nat
*)
4252 xrealloc ((char *) noname_undefs
,
4253 noname_undefs_allocated
* sizeof (struct nat
));
4255 noname_undefs
[noname_undefs_length
++] = nat
;
4258 /* Add TYPE to the UNDEF_TYPES vector.
4259 See add_undefined_type for more details. */
4262 add_undefined_type_1 (struct type
*type
)
4264 if (undef_types_length
== undef_types_allocated
)
4266 undef_types_allocated
*= 2;
4267 undef_types
= (struct type
**)
4268 xrealloc ((char *) undef_types
,
4269 undef_types_allocated
* sizeof (struct type
*));
4271 undef_types
[undef_types_length
++] = type
;
4274 /* What about types defined as forward references inside of a small lexical
4276 /* Add a type to the list of undefined types to be checked through
4277 once this file has been read in.
4279 In practice, we actually maintain two such lists: The first list
4280 (UNDEF_TYPES) is used for types whose name has been provided, and
4281 concerns forward references (eg 'xs' or 'xu' forward references);
4282 the second list (NONAME_UNDEFS) is used for types whose name is
4283 unknown at creation time, because they were referenced through
4284 their type number before the actual type was declared.
4285 This function actually adds the given type to the proper list. */
4288 add_undefined_type (struct type
*type
, int typenums
[2])
4290 if (TYPE_TAG_NAME (type
) == NULL
)
4291 add_undefined_type_noname (type
, typenums
);
4293 add_undefined_type_1 (type
);
4296 /* Try to fix all undefined types pushed on the UNDEF_TYPES vector. */
4299 cleanup_undefined_types_noname (void)
4303 for (i
= 0; i
< noname_undefs_length
; i
++)
4305 struct nat nat
= noname_undefs
[i
];
4308 type
= dbx_lookup_type (nat
.typenums
);
4309 if (nat
.type
!= *type
&& TYPE_CODE (*type
) != TYPE_CODE_UNDEF
)
4311 /* The instance flags of the undefined type are still unset,
4312 and needs to be copied over from the reference type.
4313 Since replace_type expects them to be identical, we need
4314 to set these flags manually before hand. */
4315 TYPE_INSTANCE_FLAGS (nat
.type
) = TYPE_INSTANCE_FLAGS (*type
);
4316 replace_type (nat
.type
, *type
);
4320 noname_undefs_length
= 0;
4323 /* Go through each undefined type, see if it's still undefined, and fix it
4324 up if possible. We have two kinds of undefined types:
4326 TYPE_CODE_ARRAY: Array whose target type wasn't defined yet.
4327 Fix: update array length using the element bounds
4328 and the target type's length.
4329 TYPE_CODE_STRUCT, TYPE_CODE_UNION: Structure whose fields were not
4330 yet defined at the time a pointer to it was made.
4331 Fix: Do a full lookup on the struct/union tag. */
4334 cleanup_undefined_types_1 (void)
4338 /* Iterate over every undefined type, and look for a symbol whose type
4339 matches our undefined type. The symbol matches if:
4340 1. It is a typedef in the STRUCT domain;
4341 2. It has the same name, and same type code;
4342 3. The instance flags are identical.
4344 It is important to check the instance flags, because we have seen
4345 examples where the debug info contained definitions such as:
4347 "foo_t:t30=B31=xefoo_t:"
4349 In this case, we have created an undefined type named "foo_t" whose
4350 instance flags is null (when processing "xefoo_t"), and then created
4351 another type with the same name, but with different instance flags
4352 ('B' means volatile). I think that the definition above is wrong,
4353 since the same type cannot be volatile and non-volatile at the same
4354 time, but we need to be able to cope with it when it happens. The
4355 approach taken here is to treat these two types as different. */
4357 for (type
= undef_types
; type
< undef_types
+ undef_types_length
; type
++)
4359 switch (TYPE_CODE (*type
))
4362 case TYPE_CODE_STRUCT
:
4363 case TYPE_CODE_UNION
:
4364 case TYPE_CODE_ENUM
:
4366 /* Check if it has been defined since. Need to do this here
4367 as well as in check_typedef to deal with the (legitimate in
4368 C though not C++) case of several types with the same name
4369 in different source files. */
4370 if (TYPE_STUB (*type
))
4372 struct pending
*ppt
;
4374 /* Name of the type, without "struct" or "union" */
4375 char *typename
= TYPE_TAG_NAME (*type
);
4377 if (typename
== NULL
)
4379 complaint (&symfile_complaints
, _("need a type name"));
4382 for (ppt
= file_symbols
; ppt
; ppt
= ppt
->next
)
4384 for (i
= 0; i
< ppt
->nsyms
; i
++)
4386 struct symbol
*sym
= ppt
->symbol
[i
];
4388 if (SYMBOL_CLASS (sym
) == LOC_TYPEDEF
4389 && SYMBOL_DOMAIN (sym
) == STRUCT_DOMAIN
4390 && (TYPE_CODE (SYMBOL_TYPE (sym
)) ==
4392 && (TYPE_INSTANCE_FLAGS (*type
) ==
4393 TYPE_INSTANCE_FLAGS (SYMBOL_TYPE (sym
)))
4394 && strcmp (SYMBOL_LINKAGE_NAME (sym
),
4396 replace_type (*type
, SYMBOL_TYPE (sym
));
4405 complaint (&symfile_complaints
,
4406 _("forward-referenced types left unresolved, "
4414 undef_types_length
= 0;
4417 /* Try to fix all the undefined types we ecountered while processing
4421 cleanup_undefined_types (void)
4423 cleanup_undefined_types_1 ();
4424 cleanup_undefined_types_noname ();
4427 /* Scan through all of the global symbols defined in the object file,
4428 assigning values to the debugging symbols that need to be assigned
4429 to. Get these symbols from the minimal symbol table. */
4432 scan_file_globals (struct objfile
*objfile
)
4435 struct minimal_symbol
*msymbol
;
4436 struct symbol
*sym
, *prev
;
4437 struct objfile
*resolve_objfile
;
4439 /* SVR4 based linkers copy referenced global symbols from shared
4440 libraries to the main executable.
4441 If we are scanning the symbols for a shared library, try to resolve
4442 them from the minimal symbols of the main executable first. */
4444 if (symfile_objfile
&& objfile
!= symfile_objfile
)
4445 resolve_objfile
= symfile_objfile
;
4447 resolve_objfile
= objfile
;
4451 /* Avoid expensive loop through all minimal symbols if there are
4452 no unresolved symbols. */
4453 for (hash
= 0; hash
< HASHSIZE
; hash
++)
4455 if (global_sym_chain
[hash
])
4458 if (hash
>= HASHSIZE
)
4461 ALL_OBJFILE_MSYMBOLS (resolve_objfile
, msymbol
)
4465 /* Skip static symbols. */
4466 switch (MSYMBOL_TYPE (msymbol
))
4478 /* Get the hash index and check all the symbols
4479 under that hash index. */
4481 hash
= hashname (SYMBOL_LINKAGE_NAME (msymbol
));
4483 for (sym
= global_sym_chain
[hash
]; sym
;)
4485 if (strcmp (SYMBOL_LINKAGE_NAME (msymbol
),
4486 SYMBOL_LINKAGE_NAME (sym
)) == 0)
4488 /* Splice this symbol out of the hash chain and
4489 assign the value we have to it. */
4492 SYMBOL_VALUE_CHAIN (prev
) = SYMBOL_VALUE_CHAIN (sym
);
4496 global_sym_chain
[hash
] = SYMBOL_VALUE_CHAIN (sym
);
4499 /* Check to see whether we need to fix up a common block. */
4500 /* Note: this code might be executed several times for
4501 the same symbol if there are multiple references. */
4504 if (SYMBOL_CLASS (sym
) == LOC_BLOCK
)
4506 fix_common_block (sym
,
4507 SYMBOL_VALUE_ADDRESS (msymbol
));
4511 SYMBOL_VALUE_ADDRESS (sym
)
4512 = SYMBOL_VALUE_ADDRESS (msymbol
);
4514 SYMBOL_SECTION (sym
) = SYMBOL_SECTION (msymbol
);
4519 sym
= SYMBOL_VALUE_CHAIN (prev
);
4523 sym
= global_sym_chain
[hash
];
4529 sym
= SYMBOL_VALUE_CHAIN (sym
);
4533 if (resolve_objfile
== objfile
)
4535 resolve_objfile
= objfile
;
4538 /* Change the storage class of any remaining unresolved globals to
4539 LOC_UNRESOLVED and remove them from the chain. */
4540 for (hash
= 0; hash
< HASHSIZE
; hash
++)
4542 sym
= global_sym_chain
[hash
];
4546 sym
= SYMBOL_VALUE_CHAIN (sym
);
4548 /* Change the symbol address from the misleading chain value
4550 SYMBOL_VALUE_ADDRESS (prev
) = 0;
4552 /* Complain about unresolved common block symbols. */
4553 if (SYMBOL_CLASS (prev
) == LOC_STATIC
)
4554 SYMBOL_CLASS (prev
) = LOC_UNRESOLVED
;
4556 complaint (&symfile_complaints
,
4557 _("%s: common block `%s' from global_sym_chain unresolved"),
4558 objfile
->name
, SYMBOL_PRINT_NAME (prev
));
4561 memset (global_sym_chain
, 0, sizeof (global_sym_chain
));
4564 /* Initialize anything that needs initializing when starting to read
4565 a fresh piece of a symbol file, e.g. reading in the stuff corresponding
4569 stabsread_init (void)
4573 /* Initialize anything that needs initializing when a completely new
4574 symbol file is specified (not just adding some symbols from another
4575 file, e.g. a shared library). */
4578 stabsread_new_init (void)
4580 /* Empty the hash table of global syms looking for values. */
4581 memset (global_sym_chain
, 0, sizeof (global_sym_chain
));
4584 /* Initialize anything that needs initializing at the same time as
4585 start_symtab() is called. */
4590 global_stabs
= NULL
; /* AIX COFF */
4591 /* Leave FILENUM of 0 free for builtin types and this file's types. */
4592 n_this_object_header_files
= 1;
4593 type_vector_length
= 0;
4594 type_vector
= (struct type
**) 0;
4596 /* FIXME: If common_block_name is not already NULL, we should complain(). */
4597 common_block_name
= NULL
;
4600 /* Call after end_symtab() */
4607 xfree (type_vector
);
4610 type_vector_length
= 0;
4611 previous_stab_code
= 0;
4615 finish_global_stabs (struct objfile
*objfile
)
4619 patch_block_stabs (global_symbols
, global_stabs
, objfile
);
4620 xfree (global_stabs
);
4621 global_stabs
= NULL
;
4625 /* Find the end of the name, delimited by a ':', but don't match
4626 ObjC symbols which look like -[Foo bar::]:bla. */
4628 find_name_end (char *name
)
4631 if (s
[0] == '-' || *s
== '+')
4633 /* Must be an ObjC method symbol. */
4636 error (_("invalid symbol name \"%s\""), name
);
4638 s
= strchr (s
, ']');
4641 error (_("invalid symbol name \"%s\""), name
);
4643 return strchr (s
, ':');
4647 return strchr (s
, ':');
4651 /* Initializer for this module */
4654 _initialize_stabsread (void)
4656 undef_types_allocated
= 20;
4657 undef_types_length
= 0;
4658 undef_types
= (struct type
**)
4659 xmalloc (undef_types_allocated
* sizeof (struct type
*));
4661 noname_undefs_allocated
= 20;
4662 noname_undefs_length
= 0;
4663 noname_undefs
= (struct nat
*)
4664 xmalloc (noname_undefs_allocated
* sizeof (struct nat
));