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
));
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
));
1714 struct type_list
*next
;
1718 while (**pp
&& **pp
!= '#')
1720 struct type
*arg_type
= read_type (pp
, objfile
);
1721 struct type_list
*new = alloca (sizeof (*new));
1722 new->type
= arg_type
;
1723 new->next
= arg_types
;
1731 complaint (&symfile_complaints
,
1732 _("Prototyped function type didn't end arguments with `#':\n%s"),
1736 /* If there is just one argument whose type is `void', then
1737 that's just an empty argument list. */
1739 && ! arg_types
->next
1740 && TYPE_CODE (arg_types
->type
) == TYPE_CODE_VOID
)
1743 TYPE_FIELDS (func_type
)
1744 = (struct field
*) TYPE_ALLOC (func_type
,
1745 num_args
* sizeof (struct field
));
1746 memset (TYPE_FIELDS (func_type
), 0, num_args
* sizeof (struct field
));
1749 struct type_list
*t
;
1751 /* We stuck each argument type onto the front of the list
1752 when we read it, so the list is reversed. Build the
1753 fields array right-to-left. */
1754 for (t
= arg_types
, i
= num_args
- 1; t
; t
= t
->next
, i
--)
1755 TYPE_FIELD_TYPE (func_type
, i
) = t
->type
;
1757 TYPE_NFIELDS (func_type
) = num_args
;
1758 TYPE_PROTOTYPED (func_type
) = 1;
1764 case 'k': /* Const qualifier on some type (Sun) */
1765 type
= read_type (pp
, objfile
);
1766 type
= make_cv_type (1, TYPE_VOLATILE (type
), type
,
1767 dbx_lookup_type (typenums
));
1770 case 'B': /* Volatile qual on some type (Sun) */
1771 type
= read_type (pp
, objfile
);
1772 type
= make_cv_type (TYPE_CONST (type
), 1, type
,
1773 dbx_lookup_type (typenums
));
1777 if (isdigit (**pp
) || **pp
== '(' || **pp
== '-')
1778 { /* Member (class & variable) type */
1779 /* FIXME -- we should be doing smash_to_XXX types here. */
1781 struct type
*domain
= read_type (pp
, objfile
);
1782 struct type
*memtype
;
1785 /* Invalid member type data format. */
1786 return error_type (pp
, objfile
);
1789 memtype
= read_type (pp
, objfile
);
1790 type
= dbx_alloc_type (typenums
, objfile
);
1791 smash_to_memberptr_type (type
, domain
, memtype
);
1794 /* type attribute */
1797 /* Skip to the semicolon. */
1798 while (**pp
!= ';' && **pp
!= '\0')
1801 return error_type (pp
, objfile
);
1803 ++ * pp
; /* Skip the semicolon. */
1807 case 's': /* Size attribute */
1808 type_size
= atoi (attr
+ 1);
1813 case 'S': /* String attribute */
1814 /* FIXME: check to see if following type is array? */
1818 case 'V': /* Vector attribute */
1819 /* FIXME: check to see if following type is array? */
1824 /* Ignore unrecognized type attributes, so future compilers
1825 can invent new ones. */
1833 case '#': /* Method (class & fn) type */
1834 if ((*pp
)[0] == '#')
1836 /* We'll get the parameter types from the name. */
1837 struct type
*return_type
;
1840 return_type
= read_type (pp
, objfile
);
1841 if (*(*pp
)++ != ';')
1842 complaint (&symfile_complaints
,
1843 _("invalid (minimal) member type data format at symtab pos %d."),
1845 type
= allocate_stub_method (return_type
);
1846 if (typenums
[0] != -1)
1847 *dbx_lookup_type (typenums
) = type
;
1851 struct type
*domain
= read_type (pp
, objfile
);
1852 struct type
*return_type
;
1857 /* Invalid member type data format. */
1858 return error_type (pp
, objfile
);
1862 return_type
= read_type (pp
, objfile
);
1863 args
= read_args (pp
, ';', objfile
, &nargs
, &varargs
);
1865 return error_type (pp
, objfile
);
1866 type
= dbx_alloc_type (typenums
, objfile
);
1867 smash_to_method_type (type
, domain
, return_type
, args
,
1872 case 'r': /* Range type */
1873 type
= read_range_type (pp
, typenums
, type_size
, objfile
);
1874 if (typenums
[0] != -1)
1875 *dbx_lookup_type (typenums
) = type
;
1880 /* Sun ACC builtin int type */
1881 type
= read_sun_builtin_type (pp
, typenums
, objfile
);
1882 if (typenums
[0] != -1)
1883 *dbx_lookup_type (typenums
) = type
;
1887 case 'R': /* Sun ACC builtin float type */
1888 type
= read_sun_floating_type (pp
, typenums
, objfile
);
1889 if (typenums
[0] != -1)
1890 *dbx_lookup_type (typenums
) = type
;
1893 case 'e': /* Enumeration type */
1894 type
= dbx_alloc_type (typenums
, objfile
);
1895 type
= read_enum_type (pp
, type
, objfile
);
1896 if (typenums
[0] != -1)
1897 *dbx_lookup_type (typenums
) = type
;
1900 case 's': /* Struct type */
1901 case 'u': /* Union type */
1903 enum type_code type_code
= TYPE_CODE_UNDEF
;
1904 type
= dbx_alloc_type (typenums
, objfile
);
1905 switch (type_descriptor
)
1908 type_code
= TYPE_CODE_STRUCT
;
1911 type_code
= TYPE_CODE_UNION
;
1914 type
= read_struct_type (pp
, type
, type_code
, objfile
);
1918 case 'a': /* Array type */
1920 return error_type (pp
, objfile
);
1923 type
= dbx_alloc_type (typenums
, objfile
);
1924 type
= read_array_type (pp
, type
, objfile
);
1926 TYPE_CODE (type
) = TYPE_CODE_STRING
;
1928 make_vector_type (type
);
1931 case 'S': /* Set or bitstring type */
1932 type1
= read_type (pp
, objfile
);
1933 type
= create_set_type ((struct type
*) NULL
, type1
);
1935 TYPE_CODE (type
) = TYPE_CODE_BITSTRING
;
1936 if (typenums
[0] != -1)
1937 *dbx_lookup_type (typenums
) = type
;
1941 --*pp
; /* Go back to the symbol in error */
1942 /* Particularly important if it was \0! */
1943 return error_type (pp
, objfile
);
1948 warning (_("GDB internal error, type is NULL in stabsread.c."));
1949 return error_type (pp
, objfile
);
1952 /* Size specified in a type attribute overrides any other size. */
1953 if (type_size
!= -1)
1954 TYPE_LENGTH (type
) = (type_size
+ TARGET_CHAR_BIT
- 1) / TARGET_CHAR_BIT
;
1959 /* RS/6000 xlc/dbx combination uses a set of builtin types, starting from -1.
1960 Return the proper type node for a given builtin type number. */
1962 static struct type
*
1963 rs6000_builtin_type (int typenum
)
1965 /* We recognize types numbered from -NUMBER_RECOGNIZED to -1. */
1966 #define NUMBER_RECOGNIZED 34
1967 /* This includes an empty slot for type number -0. */
1968 static struct type
*negative_types
[NUMBER_RECOGNIZED
+ 1];
1969 struct type
*rettype
= NULL
;
1971 if (typenum
>= 0 || typenum
< -NUMBER_RECOGNIZED
)
1973 complaint (&symfile_complaints
, _("Unknown builtin type %d"), typenum
);
1974 return builtin_type_error
;
1976 if (negative_types
[-typenum
] != NULL
)
1977 return negative_types
[-typenum
];
1979 #if TARGET_CHAR_BIT != 8
1980 #error This code wrong for TARGET_CHAR_BIT not 8
1981 /* These definitions all assume that TARGET_CHAR_BIT is 8. I think
1982 that if that ever becomes not true, the correct fix will be to
1983 make the size in the struct type to be in bits, not in units of
1990 /* The size of this and all the other types are fixed, defined
1991 by the debugging format. If there is a type called "int" which
1992 is other than 32 bits, then it should use a new negative type
1993 number (or avoid negative type numbers for that case).
1994 See stabs.texinfo. */
1995 rettype
= init_type (TYPE_CODE_INT
, 4, 0, "int", NULL
);
1998 rettype
= init_type (TYPE_CODE_INT
, 1, 0, "char", NULL
);
2001 rettype
= init_type (TYPE_CODE_INT
, 2, 0, "short", NULL
);
2004 rettype
= init_type (TYPE_CODE_INT
, 4, 0, "long", NULL
);
2007 rettype
= init_type (TYPE_CODE_INT
, 1, TYPE_FLAG_UNSIGNED
,
2008 "unsigned char", NULL
);
2011 rettype
= init_type (TYPE_CODE_INT
, 1, 0, "signed char", NULL
);
2014 rettype
= init_type (TYPE_CODE_INT
, 2, TYPE_FLAG_UNSIGNED
,
2015 "unsigned short", NULL
);
2018 rettype
= init_type (TYPE_CODE_INT
, 4, TYPE_FLAG_UNSIGNED
,
2019 "unsigned int", NULL
);
2022 rettype
= init_type (TYPE_CODE_INT
, 4, TYPE_FLAG_UNSIGNED
,
2025 rettype
= init_type (TYPE_CODE_INT
, 4, TYPE_FLAG_UNSIGNED
,
2026 "unsigned long", NULL
);
2029 rettype
= init_type (TYPE_CODE_VOID
, 1, 0, "void", NULL
);
2032 /* IEEE single precision (32 bit). */
2033 rettype
= init_type (TYPE_CODE_FLT
, 4, 0, "float", NULL
);
2036 /* IEEE double precision (64 bit). */
2037 rettype
= init_type (TYPE_CODE_FLT
, 8, 0, "double", NULL
);
2040 /* This is an IEEE double on the RS/6000, and different machines with
2041 different sizes for "long double" should use different negative
2042 type numbers. See stabs.texinfo. */
2043 rettype
= init_type (TYPE_CODE_FLT
, 8, 0, "long double", NULL
);
2046 rettype
= init_type (TYPE_CODE_INT
, 4, 0, "integer", NULL
);
2049 rettype
= init_type (TYPE_CODE_BOOL
, 4, TYPE_FLAG_UNSIGNED
,
2053 rettype
= init_type (TYPE_CODE_FLT
, 4, 0, "short real", NULL
);
2056 rettype
= init_type (TYPE_CODE_FLT
, 8, 0, "real", NULL
);
2059 rettype
= init_type (TYPE_CODE_ERROR
, 0, 0, "stringptr", NULL
);
2062 rettype
= init_type (TYPE_CODE_CHAR
, 1, TYPE_FLAG_UNSIGNED
,
2066 rettype
= init_type (TYPE_CODE_BOOL
, 1, TYPE_FLAG_UNSIGNED
,
2070 rettype
= init_type (TYPE_CODE_BOOL
, 2, TYPE_FLAG_UNSIGNED
,
2074 rettype
= init_type (TYPE_CODE_BOOL
, 4, TYPE_FLAG_UNSIGNED
,
2078 rettype
= init_type (TYPE_CODE_BOOL
, 4, TYPE_FLAG_UNSIGNED
,
2082 /* Complex type consisting of two IEEE single precision values. */
2083 rettype
= init_type (TYPE_CODE_COMPLEX
, 8, 0, "complex", NULL
);
2084 TYPE_TARGET_TYPE (rettype
) = init_type (TYPE_CODE_FLT
, 4, 0, "float",
2088 /* Complex type consisting of two IEEE double precision values. */
2089 rettype
= init_type (TYPE_CODE_COMPLEX
, 16, 0, "double complex", NULL
);
2090 TYPE_TARGET_TYPE (rettype
) = init_type (TYPE_CODE_FLT
, 8, 0, "double",
2094 rettype
= init_type (TYPE_CODE_INT
, 1, 0, "integer*1", NULL
);
2097 rettype
= init_type (TYPE_CODE_INT
, 2, 0, "integer*2", NULL
);
2100 rettype
= init_type (TYPE_CODE_INT
, 4, 0, "integer*4", NULL
);
2103 rettype
= init_type (TYPE_CODE_CHAR
, 2, 0, "wchar", NULL
);
2106 rettype
= init_type (TYPE_CODE_INT
, 8, 0, "long long", NULL
);
2109 rettype
= init_type (TYPE_CODE_INT
, 8, TYPE_FLAG_UNSIGNED
,
2110 "unsigned long long", NULL
);
2113 rettype
= init_type (TYPE_CODE_INT
, 8, TYPE_FLAG_UNSIGNED
,
2117 rettype
= init_type (TYPE_CODE_INT
, 8, 0, "integer*8", NULL
);
2120 negative_types
[-typenum
] = rettype
;
2124 /* This page contains subroutines of read_type. */
2126 /* Replace *OLD_NAME with the method name portion of PHYSNAME. */
2129 update_method_name_from_physname (char **old_name
, char *physname
)
2133 method_name
= method_name_from_physname (physname
);
2135 if (method_name
== NULL
)
2137 complaint (&symfile_complaints
,
2138 _("Method has bad physname %s\n"), physname
);
2142 if (strcmp (*old_name
, method_name
) != 0)
2145 *old_name
= method_name
;
2148 xfree (method_name
);
2151 /* Read member function stabs info for C++ classes. The form of each member
2154 NAME :: TYPENUM[=type definition] ARGS : PHYSNAME ;
2156 An example with two member functions is:
2158 afunc1::20=##15;:i;2A.;afunc2::20:i;2A.;
2160 For the case of overloaded operators, the format is op$::*.funcs, where
2161 $ is the CPLUS_MARKER (usually '$'), `*' holds the place for an operator
2162 name (such as `+=') and `.' marks the end of the operator name.
2164 Returns 1 for success, 0 for failure. */
2167 read_member_functions (struct field_info
*fip
, char **pp
, struct type
*type
,
2168 struct objfile
*objfile
)
2172 /* Total number of member functions defined in this class. If the class
2173 defines two `f' functions, and one `g' function, then this will have
2175 int total_length
= 0;
2179 struct next_fnfield
*next
;
2180 struct fn_field fn_field
;
2183 struct type
*look_ahead_type
;
2184 struct next_fnfieldlist
*new_fnlist
;
2185 struct next_fnfield
*new_sublist
;
2189 /* Process each list until we find something that is not a member function
2190 or find the end of the functions. */
2194 /* We should be positioned at the start of the function name.
2195 Scan forward to find the first ':' and if it is not the
2196 first of a "::" delimiter, then this is not a member function. */
2208 look_ahead_type
= NULL
;
2211 new_fnlist
= (struct next_fnfieldlist
*)
2212 xmalloc (sizeof (struct next_fnfieldlist
));
2213 make_cleanup (xfree
, new_fnlist
);
2214 memset (new_fnlist
, 0, sizeof (struct next_fnfieldlist
));
2216 if ((*pp
)[0] == 'o' && (*pp
)[1] == 'p' && is_cplus_marker ((*pp
)[2]))
2218 /* This is a completely wierd case. In order to stuff in the
2219 names that might contain colons (the usual name delimiter),
2220 Mike Tiemann defined a different name format which is
2221 signalled if the identifier is "op$". In that case, the
2222 format is "op$::XXXX." where XXXX is the name. This is
2223 used for names like "+" or "=". YUUUUUUUK! FIXME! */
2224 /* This lets the user type "break operator+".
2225 We could just put in "+" as the name, but that wouldn't
2227 static char opname
[32] = "op$";
2228 char *o
= opname
+ 3;
2230 /* Skip past '::'. */
2233 STABS_CONTINUE (pp
, objfile
);
2239 main_fn_name
= savestring (opname
, o
- opname
);
2245 main_fn_name
= savestring (*pp
, p
- *pp
);
2246 /* Skip past '::'. */
2249 new_fnlist
->fn_fieldlist
.name
= main_fn_name
;
2254 (struct next_fnfield
*) xmalloc (sizeof (struct next_fnfield
));
2255 make_cleanup (xfree
, new_sublist
);
2256 memset (new_sublist
, 0, sizeof (struct next_fnfield
));
2258 /* Check for and handle cretinous dbx symbol name continuation! */
2259 if (look_ahead_type
== NULL
)
2262 STABS_CONTINUE (pp
, objfile
);
2264 new_sublist
->fn_field
.type
= read_type (pp
, objfile
);
2267 /* Invalid symtab info for member function. */
2273 /* g++ version 1 kludge */
2274 new_sublist
->fn_field
.type
= look_ahead_type
;
2275 look_ahead_type
= NULL
;
2285 /* If this is just a stub, then we don't have the real name here. */
2287 if (TYPE_STUB (new_sublist
->fn_field
.type
))
2289 if (!TYPE_DOMAIN_TYPE (new_sublist
->fn_field
.type
))
2290 TYPE_DOMAIN_TYPE (new_sublist
->fn_field
.type
) = type
;
2291 new_sublist
->fn_field
.is_stub
= 1;
2293 new_sublist
->fn_field
.physname
= savestring (*pp
, p
- *pp
);
2296 /* Set this member function's visibility fields. */
2299 case VISIBILITY_PRIVATE
:
2300 new_sublist
->fn_field
.is_private
= 1;
2302 case VISIBILITY_PROTECTED
:
2303 new_sublist
->fn_field
.is_protected
= 1;
2307 STABS_CONTINUE (pp
, objfile
);
2310 case 'A': /* Normal functions. */
2311 new_sublist
->fn_field
.is_const
= 0;
2312 new_sublist
->fn_field
.is_volatile
= 0;
2315 case 'B': /* `const' member functions. */
2316 new_sublist
->fn_field
.is_const
= 1;
2317 new_sublist
->fn_field
.is_volatile
= 0;
2320 case 'C': /* `volatile' member function. */
2321 new_sublist
->fn_field
.is_const
= 0;
2322 new_sublist
->fn_field
.is_volatile
= 1;
2325 case 'D': /* `const volatile' member function. */
2326 new_sublist
->fn_field
.is_const
= 1;
2327 new_sublist
->fn_field
.is_volatile
= 1;
2330 case '*': /* File compiled with g++ version 1 -- no info */
2335 complaint (&symfile_complaints
,
2336 _("const/volatile indicator missing, got '%c'"), **pp
);
2345 /* virtual member function, followed by index.
2346 The sign bit is set to distinguish pointers-to-methods
2347 from virtual function indicies. Since the array is
2348 in words, the quantity must be shifted left by 1
2349 on 16 bit machine, and by 2 on 32 bit machine, forcing
2350 the sign bit out, and usable as a valid index into
2351 the array. Remove the sign bit here. */
2352 new_sublist
->fn_field
.voffset
=
2353 (0x7fffffff & read_huge_number (pp
, ';', &nbits
, 0)) + 2;
2357 STABS_CONTINUE (pp
, objfile
);
2358 if (**pp
== ';' || **pp
== '\0')
2360 /* Must be g++ version 1. */
2361 new_sublist
->fn_field
.fcontext
= 0;
2365 /* Figure out from whence this virtual function came.
2366 It may belong to virtual function table of
2367 one of its baseclasses. */
2368 look_ahead_type
= read_type (pp
, objfile
);
2371 /* g++ version 1 overloaded methods. */
2375 new_sublist
->fn_field
.fcontext
= look_ahead_type
;
2384 look_ahead_type
= NULL
;
2390 /* static member function. */
2392 int slen
= strlen (main_fn_name
);
2394 new_sublist
->fn_field
.voffset
= VOFFSET_STATIC
;
2396 /* For static member functions, we can't tell if they
2397 are stubbed, as they are put out as functions, and not as
2399 GCC v2 emits the fully mangled name if
2400 dbxout.c:flag_minimal_debug is not set, so we have to
2401 detect a fully mangled physname here and set is_stub
2402 accordingly. Fully mangled physnames in v2 start with
2403 the member function name, followed by two underscores.
2404 GCC v3 currently always emits stubbed member functions,
2405 but with fully mangled physnames, which start with _Z. */
2406 if (!(strncmp (new_sublist
->fn_field
.physname
,
2407 main_fn_name
, slen
) == 0
2408 && new_sublist
->fn_field
.physname
[slen
] == '_'
2409 && new_sublist
->fn_field
.physname
[slen
+ 1] == '_'))
2411 new_sublist
->fn_field
.is_stub
= 1;
2418 complaint (&symfile_complaints
,
2419 _("member function type missing, got '%c'"), (*pp
)[-1]);
2420 /* Fall through into normal member function. */
2423 /* normal member function. */
2424 new_sublist
->fn_field
.voffset
= 0;
2425 new_sublist
->fn_field
.fcontext
= 0;
2429 new_sublist
->next
= sublist
;
2430 sublist
= new_sublist
;
2432 STABS_CONTINUE (pp
, objfile
);
2434 while (**pp
!= ';' && **pp
!= '\0');
2437 STABS_CONTINUE (pp
, objfile
);
2439 /* Skip GCC 3.X member functions which are duplicates of the callable
2440 constructor/destructor. */
2441 if (strcmp (main_fn_name
, "__base_ctor") == 0
2442 || strcmp (main_fn_name
, "__base_dtor") == 0
2443 || strcmp (main_fn_name
, "__deleting_dtor") == 0)
2445 xfree (main_fn_name
);
2450 int has_destructor
= 0, has_other
= 0;
2452 struct next_fnfield
*tmp_sublist
;
2454 /* Various versions of GCC emit various mostly-useless
2455 strings in the name field for special member functions.
2457 For stub methods, we need to defer correcting the name
2458 until we are ready to unstub the method, because the current
2459 name string is used by gdb_mangle_name. The only stub methods
2460 of concern here are GNU v2 operators; other methods have their
2461 names correct (see caveat below).
2463 For non-stub methods, in GNU v3, we have a complete physname.
2464 Therefore we can safely correct the name now. This primarily
2465 affects constructors and destructors, whose name will be
2466 __comp_ctor or __comp_dtor instead of Foo or ~Foo. Cast
2467 operators will also have incorrect names; for instance,
2468 "operator int" will be named "operator i" (i.e. the type is
2471 For non-stub methods in GNU v2, we have no easy way to
2472 know if we have a complete physname or not. For most
2473 methods the result depends on the platform (if CPLUS_MARKER
2474 can be `$' or `.', it will use minimal debug information, or
2475 otherwise the full physname will be included).
2477 Rather than dealing with this, we take a different approach.
2478 For v3 mangled names, we can use the full physname; for v2,
2479 we use cplus_demangle_opname (which is actually v2 specific),
2480 because the only interesting names are all operators - once again
2481 barring the caveat below. Skip this process if any method in the
2482 group is a stub, to prevent our fouling up the workings of
2485 The caveat: GCC 2.95.x (and earlier?) put constructors and
2486 destructors in the same method group. We need to split this
2487 into two groups, because they should have different names.
2488 So for each method group we check whether it contains both
2489 routines whose physname appears to be a destructor (the physnames
2490 for and destructors are always provided, due to quirks in v2
2491 mangling) and routines whose physname does not appear to be a
2492 destructor. If so then we break up the list into two halves.
2493 Even if the constructors and destructors aren't in the same group
2494 the destructor will still lack the leading tilde, so that also
2497 So, to summarize what we expect and handle here:
2499 Given Given Real Real Action
2500 method name physname physname method name
2502 __opi [none] __opi__3Foo operator int opname
2504 Foo _._3Foo _._3Foo ~Foo separate and
2506 operator i _ZN3FoocviEv _ZN3FoocviEv operator int demangle
2507 __comp_ctor _ZN3FooC1ERKS_ _ZN3FooC1ERKS_ Foo demangle
2510 tmp_sublist
= sublist
;
2511 while (tmp_sublist
!= NULL
)
2513 if (tmp_sublist
->fn_field
.is_stub
)
2515 if (tmp_sublist
->fn_field
.physname
[0] == '_'
2516 && tmp_sublist
->fn_field
.physname
[1] == 'Z')
2519 if (is_destructor_name (tmp_sublist
->fn_field
.physname
))
2524 tmp_sublist
= tmp_sublist
->next
;
2527 if (has_destructor
&& has_other
)
2529 struct next_fnfieldlist
*destr_fnlist
;
2530 struct next_fnfield
*last_sublist
;
2532 /* Create a new fn_fieldlist for the destructors. */
2534 destr_fnlist
= (struct next_fnfieldlist
*)
2535 xmalloc (sizeof (struct next_fnfieldlist
));
2536 make_cleanup (xfree
, destr_fnlist
);
2537 memset (destr_fnlist
, 0, sizeof (struct next_fnfieldlist
));
2538 destr_fnlist
->fn_fieldlist
.name
2539 = obconcat (&objfile
->objfile_obstack
, "", "~",
2540 new_fnlist
->fn_fieldlist
.name
);
2542 destr_fnlist
->fn_fieldlist
.fn_fields
= (struct fn_field
*)
2543 obstack_alloc (&objfile
->objfile_obstack
,
2544 sizeof (struct fn_field
) * has_destructor
);
2545 memset (destr_fnlist
->fn_fieldlist
.fn_fields
, 0,
2546 sizeof (struct fn_field
) * has_destructor
);
2547 tmp_sublist
= sublist
;
2548 last_sublist
= NULL
;
2550 while (tmp_sublist
!= NULL
)
2552 if (!is_destructor_name (tmp_sublist
->fn_field
.physname
))
2554 tmp_sublist
= tmp_sublist
->next
;
2558 destr_fnlist
->fn_fieldlist
.fn_fields
[i
++]
2559 = tmp_sublist
->fn_field
;
2561 last_sublist
->next
= tmp_sublist
->next
;
2563 sublist
= tmp_sublist
->next
;
2564 last_sublist
= tmp_sublist
;
2565 tmp_sublist
= tmp_sublist
->next
;
2568 destr_fnlist
->fn_fieldlist
.length
= has_destructor
;
2569 destr_fnlist
->next
= fip
->fnlist
;
2570 fip
->fnlist
= destr_fnlist
;
2572 total_length
+= has_destructor
;
2573 length
-= has_destructor
;
2577 /* v3 mangling prevents the use of abbreviated physnames,
2578 so we can do this here. There are stubbed methods in v3
2580 - in -gstabs instead of -gstabs+
2581 - or for static methods, which are output as a function type
2582 instead of a method type. */
2584 update_method_name_from_physname (&new_fnlist
->fn_fieldlist
.name
,
2585 sublist
->fn_field
.physname
);
2587 else if (has_destructor
&& new_fnlist
->fn_fieldlist
.name
[0] != '~')
2589 new_fnlist
->fn_fieldlist
.name
=
2590 concat ("~", main_fn_name
, (char *)NULL
);
2591 xfree (main_fn_name
);
2595 char dem_opname
[256];
2597 ret
= cplus_demangle_opname (new_fnlist
->fn_fieldlist
.name
,
2598 dem_opname
, DMGL_ANSI
);
2600 ret
= cplus_demangle_opname (new_fnlist
->fn_fieldlist
.name
,
2603 new_fnlist
->fn_fieldlist
.name
2604 = obsavestring (dem_opname
, strlen (dem_opname
),
2605 &objfile
->objfile_obstack
);
2608 new_fnlist
->fn_fieldlist
.fn_fields
= (struct fn_field
*)
2609 obstack_alloc (&objfile
->objfile_obstack
,
2610 sizeof (struct fn_field
) * length
);
2611 memset (new_fnlist
->fn_fieldlist
.fn_fields
, 0,
2612 sizeof (struct fn_field
) * length
);
2613 for (i
= length
; (i
--, sublist
); sublist
= sublist
->next
)
2615 new_fnlist
->fn_fieldlist
.fn_fields
[i
] = sublist
->fn_field
;
2618 new_fnlist
->fn_fieldlist
.length
= length
;
2619 new_fnlist
->next
= fip
->fnlist
;
2620 fip
->fnlist
= new_fnlist
;
2622 total_length
+= length
;
2628 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
2629 TYPE_FN_FIELDLISTS (type
) = (struct fn_fieldlist
*)
2630 TYPE_ALLOC (type
, sizeof (struct fn_fieldlist
) * nfn_fields
);
2631 memset (TYPE_FN_FIELDLISTS (type
), 0,
2632 sizeof (struct fn_fieldlist
) * nfn_fields
);
2633 TYPE_NFN_FIELDS (type
) = nfn_fields
;
2634 TYPE_NFN_FIELDS_TOTAL (type
) = total_length
;
2640 /* Special GNU C++ name.
2642 Returns 1 for success, 0 for failure. "failure" means that we can't
2643 keep parsing and it's time for error_type(). */
2646 read_cpp_abbrev (struct field_info
*fip
, char **pp
, struct type
*type
,
2647 struct objfile
*objfile
)
2652 struct type
*context
;
2662 /* At this point, *pp points to something like "22:23=*22...",
2663 where the type number before the ':' is the "context" and
2664 everything after is a regular type definition. Lookup the
2665 type, find it's name, and construct the field name. */
2667 context
= read_type (pp
, objfile
);
2671 case 'f': /* $vf -- a virtual function table pointer */
2672 name
= type_name_no_tag (context
);
2677 fip
->list
->field
.name
=
2678 obconcat (&objfile
->objfile_obstack
, vptr_name
, name
, "");
2681 case 'b': /* $vb -- a virtual bsomethingorother */
2682 name
= type_name_no_tag (context
);
2685 complaint (&symfile_complaints
,
2686 _("C++ abbreviated type name unknown at symtab pos %d"),
2690 fip
->list
->field
.name
=
2691 obconcat (&objfile
->objfile_obstack
, vb_name
, name
, "");
2695 invalid_cpp_abbrev_complaint (*pp
);
2696 fip
->list
->field
.name
=
2697 obconcat (&objfile
->objfile_obstack
,
2698 "INVALID_CPLUSPLUS_ABBREV", "", "");
2702 /* At this point, *pp points to the ':'. Skip it and read the
2708 invalid_cpp_abbrev_complaint (*pp
);
2711 fip
->list
->field
.type
= read_type (pp
, objfile
);
2713 (*pp
)++; /* Skip the comma. */
2719 FIELD_BITPOS (fip
->list
->field
) = read_huge_number (pp
, ';', &nbits
,
2724 /* This field is unpacked. */
2725 FIELD_BITSIZE (fip
->list
->field
) = 0;
2726 fip
->list
->visibility
= VISIBILITY_PRIVATE
;
2730 invalid_cpp_abbrev_complaint (*pp
);
2731 /* We have no idea what syntax an unrecognized abbrev would have, so
2732 better return 0. If we returned 1, we would need to at least advance
2733 *pp to avoid an infinite loop. */
2740 read_one_struct_field (struct field_info
*fip
, char **pp
, char *p
,
2741 struct type
*type
, struct objfile
*objfile
)
2743 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
2745 fip
->list
->field
.name
=
2746 obsavestring (*pp
, p
- *pp
, &objfile
->objfile_obstack
);
2749 /* This means we have a visibility for a field coming. */
2753 fip
->list
->visibility
= *(*pp
)++;
2757 /* normal dbx-style format, no explicit visibility */
2758 fip
->list
->visibility
= VISIBILITY_PUBLIC
;
2761 fip
->list
->field
.type
= read_type (pp
, objfile
);
2766 /* Possible future hook for nested types. */
2769 fip
->list
->field
.bitpos
= (long) -2; /* nested type */
2779 /* Static class member. */
2780 SET_FIELD_PHYSNAME (fip
->list
->field
, savestring (*pp
, p
- *pp
));
2784 else if (**pp
!= ',')
2786 /* Bad structure-type format. */
2787 stabs_general_complaint ("bad structure-type format");
2791 (*pp
)++; /* Skip the comma. */
2795 FIELD_BITPOS (fip
->list
->field
) = read_huge_number (pp
, ',', &nbits
, 0);
2798 stabs_general_complaint ("bad structure-type format");
2801 FIELD_BITSIZE (fip
->list
->field
) = read_huge_number (pp
, ';', &nbits
, 0);
2804 stabs_general_complaint ("bad structure-type format");
2809 if (FIELD_BITPOS (fip
->list
->field
) == 0
2810 && FIELD_BITSIZE (fip
->list
->field
) == 0)
2812 /* This can happen in two cases: (1) at least for gcc 2.4.5 or so,
2813 it is a field which has been optimized out. The correct stab for
2814 this case is to use VISIBILITY_IGNORE, but that is a recent
2815 invention. (2) It is a 0-size array. For example
2816 union { int num; char str[0]; } foo. Printing _("<no value>" for
2817 str in "p foo" is OK, since foo.str (and thus foo.str[3])
2818 will continue to work, and a 0-size array as a whole doesn't
2819 have any contents to print.
2821 I suspect this probably could also happen with gcc -gstabs (not
2822 -gstabs+) for static fields, and perhaps other C++ extensions.
2823 Hopefully few people use -gstabs with gdb, since it is intended
2824 for dbx compatibility. */
2826 /* Ignore this field. */
2827 fip
->list
->visibility
= VISIBILITY_IGNORE
;
2831 /* Detect an unpacked field and mark it as such.
2832 dbx gives a bit size for all fields.
2833 Note that forward refs cannot be packed,
2834 and treat enums as if they had the width of ints. */
2836 struct type
*field_type
= check_typedef (FIELD_TYPE (fip
->list
->field
));
2838 if (TYPE_CODE (field_type
) != TYPE_CODE_INT
2839 && TYPE_CODE (field_type
) != TYPE_CODE_RANGE
2840 && TYPE_CODE (field_type
) != TYPE_CODE_BOOL
2841 && TYPE_CODE (field_type
) != TYPE_CODE_ENUM
)
2843 FIELD_BITSIZE (fip
->list
->field
) = 0;
2845 if ((FIELD_BITSIZE (fip
->list
->field
)
2846 == TARGET_CHAR_BIT
* TYPE_LENGTH (field_type
)
2847 || (TYPE_CODE (field_type
) == TYPE_CODE_ENUM
2848 && FIELD_BITSIZE (fip
->list
->field
)
2849 == gdbarch_int_bit (gdbarch
))
2852 FIELD_BITPOS (fip
->list
->field
) % 8 == 0)
2854 FIELD_BITSIZE (fip
->list
->field
) = 0;
2860 /* Read struct or class data fields. They have the form:
2862 NAME : [VISIBILITY] TYPENUM , BITPOS , BITSIZE ;
2864 At the end, we see a semicolon instead of a field.
2866 In C++, this may wind up being NAME:?TYPENUM:PHYSNAME; for
2869 The optional VISIBILITY is one of:
2871 '/0' (VISIBILITY_PRIVATE)
2872 '/1' (VISIBILITY_PROTECTED)
2873 '/2' (VISIBILITY_PUBLIC)
2874 '/9' (VISIBILITY_IGNORE)
2876 or nothing, for C style fields with public visibility.
2878 Returns 1 for success, 0 for failure. */
2881 read_struct_fields (struct field_info
*fip
, char **pp
, struct type
*type
,
2882 struct objfile
*objfile
)
2885 struct nextfield
*new;
2887 /* We better set p right now, in case there are no fields at all... */
2891 /* Read each data member type until we find the terminating ';' at the end of
2892 the data member list, or break for some other reason such as finding the
2893 start of the member function list. */
2894 /* Stab string for structure/union does not end with two ';' in
2895 SUN C compiler 5.3 i.e. F6U2, hence check for end of string. */
2897 while (**pp
!= ';' && **pp
!= '\0')
2899 STABS_CONTINUE (pp
, objfile
);
2900 /* Get space to record the next field's data. */
2901 new = (struct nextfield
*) xmalloc (sizeof (struct nextfield
));
2902 make_cleanup (xfree
, new);
2903 memset (new, 0, sizeof (struct nextfield
));
2904 new->next
= fip
->list
;
2907 /* Get the field name. */
2910 /* If is starts with CPLUS_MARKER it is a special abbreviation,
2911 unless the CPLUS_MARKER is followed by an underscore, in
2912 which case it is just the name of an anonymous type, which we
2913 should handle like any other type name. */
2915 if (is_cplus_marker (p
[0]) && p
[1] != '_')
2917 if (!read_cpp_abbrev (fip
, pp
, type
, objfile
))
2922 /* Look for the ':' that separates the field name from the field
2923 values. Data members are delimited by a single ':', while member
2924 functions are delimited by a pair of ':'s. When we hit the member
2925 functions (if any), terminate scan loop and return. */
2927 while (*p
!= ':' && *p
!= '\0')
2934 /* Check to see if we have hit the member functions yet. */
2939 read_one_struct_field (fip
, pp
, p
, type
, objfile
);
2941 if (p
[0] == ':' && p
[1] == ':')
2943 /* (the deleted) chill the list of fields: the last entry (at
2944 the head) is a partially constructed entry which we now
2946 fip
->list
= fip
->list
->next
;
2951 /* The stabs for C++ derived classes contain baseclass information which
2952 is marked by a '!' character after the total size. This function is
2953 called when we encounter the baseclass marker, and slurps up all the
2954 baseclass information.
2956 Immediately following the '!' marker is the number of base classes that
2957 the class is derived from, followed by information for each base class.
2958 For each base class, there are two visibility specifiers, a bit offset
2959 to the base class information within the derived class, a reference to
2960 the type for the base class, and a terminating semicolon.
2962 A typical example, with two base classes, would be "!2,020,19;0264,21;".
2964 Baseclass information marker __________________|| | | | | | |
2965 Number of baseclasses __________________________| | | | | | |
2966 Visibility specifiers (2) ________________________| | | | | |
2967 Offset in bits from start of class _________________| | | | |
2968 Type number for base class ___________________________| | | |
2969 Visibility specifiers (2) _______________________________| | |
2970 Offset in bits from start of class ________________________| |
2971 Type number of base class ____________________________________|
2973 Return 1 for success, 0 for (error-type-inducing) failure. */
2979 read_baseclasses (struct field_info
*fip
, char **pp
, struct type
*type
,
2980 struct objfile
*objfile
)
2983 struct nextfield
*new;
2991 /* Skip the '!' baseclass information marker. */
2995 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
2998 TYPE_N_BASECLASSES (type
) = read_huge_number (pp
, ',', &nbits
, 0);
3004 /* Some stupid compilers have trouble with the following, so break
3005 it up into simpler expressions. */
3006 TYPE_FIELD_VIRTUAL_BITS (type
) = (B_TYPE
*)
3007 TYPE_ALLOC (type
, B_BYTES (TYPE_N_BASECLASSES (type
)));
3010 int num_bytes
= B_BYTES (TYPE_N_BASECLASSES (type
));
3013 pointer
= (char *) TYPE_ALLOC (type
, num_bytes
);
3014 TYPE_FIELD_VIRTUAL_BITS (type
) = (B_TYPE
*) pointer
;
3018 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type
), TYPE_N_BASECLASSES (type
));
3020 for (i
= 0; i
< TYPE_N_BASECLASSES (type
); i
++)
3022 new = (struct nextfield
*) xmalloc (sizeof (struct nextfield
));
3023 make_cleanup (xfree
, new);
3024 memset (new, 0, sizeof (struct nextfield
));
3025 new->next
= fip
->list
;
3027 FIELD_BITSIZE (new->field
) = 0; /* this should be an unpacked field! */
3029 STABS_CONTINUE (pp
, objfile
);
3033 /* Nothing to do. */
3036 SET_TYPE_FIELD_VIRTUAL (type
, i
);
3039 /* Unknown character. Complain and treat it as non-virtual. */
3041 complaint (&symfile_complaints
,
3042 _("Unknown virtual character `%c' for baseclass"), **pp
);
3047 new->visibility
= *(*pp
)++;
3048 switch (new->visibility
)
3050 case VISIBILITY_PRIVATE
:
3051 case VISIBILITY_PROTECTED
:
3052 case VISIBILITY_PUBLIC
:
3055 /* Bad visibility format. Complain and treat it as
3058 complaint (&symfile_complaints
,
3059 _("Unknown visibility `%c' for baseclass"),
3061 new->visibility
= VISIBILITY_PUBLIC
;
3068 /* The remaining value is the bit offset of the portion of the object
3069 corresponding to this baseclass. Always zero in the absence of
3070 multiple inheritance. */
3072 FIELD_BITPOS (new->field
) = read_huge_number (pp
, ',', &nbits
, 0);
3077 /* The last piece of baseclass information is the type of the
3078 base class. Read it, and remember it's type name as this
3081 new->field
.type
= read_type (pp
, objfile
);
3082 new->field
.name
= type_name_no_tag (new->field
.type
);
3084 /* skip trailing ';' and bump count of number of fields seen */
3093 /* The tail end of stabs for C++ classes that contain a virtual function
3094 pointer contains a tilde, a %, and a type number.
3095 The type number refers to the base class (possibly this class itself) which
3096 contains the vtable pointer for the current class.
3098 This function is called when we have parsed all the method declarations,
3099 so we can look for the vptr base class info. */
3102 read_tilde_fields (struct field_info
*fip
, char **pp
, struct type
*type
,
3103 struct objfile
*objfile
)
3107 STABS_CONTINUE (pp
, objfile
);
3109 /* If we are positioned at a ';', then skip it. */
3119 if (**pp
== '=' || **pp
== '+' || **pp
== '-')
3121 /* Obsolete flags that used to indicate the presence
3122 of constructors and/or destructors. */
3126 /* Read either a '%' or the final ';'. */
3127 if (*(*pp
)++ == '%')
3129 /* The next number is the type number of the base class
3130 (possibly our own class) which supplies the vtable for
3131 this class. Parse it out, and search that class to find
3132 its vtable pointer, and install those into TYPE_VPTR_BASETYPE
3133 and TYPE_VPTR_FIELDNO. */
3138 t
= read_type (pp
, objfile
);
3140 while (*p
!= '\0' && *p
!= ';')
3146 /* Premature end of symbol. */
3150 TYPE_VPTR_BASETYPE (type
) = t
;
3151 if (type
== t
) /* Our own class provides vtbl ptr */
3153 for (i
= TYPE_NFIELDS (t
) - 1;
3154 i
>= TYPE_N_BASECLASSES (t
);
3157 char *name
= TYPE_FIELD_NAME (t
, i
);
3158 if (!strncmp (name
, vptr_name
, sizeof (vptr_name
) - 2)
3159 && is_cplus_marker (name
[sizeof (vptr_name
) - 2]))
3161 TYPE_VPTR_FIELDNO (type
) = i
;
3165 /* Virtual function table field not found. */
3166 complaint (&symfile_complaints
,
3167 _("virtual function table pointer not found when defining class `%s'"),
3173 TYPE_VPTR_FIELDNO (type
) = TYPE_VPTR_FIELDNO (t
);
3184 attach_fn_fields_to_type (struct field_info
*fip
, struct type
*type
)
3188 for (n
= TYPE_NFN_FIELDS (type
);
3189 fip
->fnlist
!= NULL
;
3190 fip
->fnlist
= fip
->fnlist
->next
)
3192 --n
; /* Circumvent Sun3 compiler bug */
3193 TYPE_FN_FIELDLISTS (type
)[n
] = fip
->fnlist
->fn_fieldlist
;
3198 /* Create the vector of fields, and record how big it is.
3199 We need this info to record proper virtual function table information
3200 for this class's virtual functions. */
3203 attach_fields_to_type (struct field_info
*fip
, struct type
*type
,
3204 struct objfile
*objfile
)
3207 int non_public_fields
= 0;
3208 struct nextfield
*scan
;
3210 /* Count up the number of fields that we have, as well as taking note of
3211 whether or not there are any non-public fields, which requires us to
3212 allocate and build the private_field_bits and protected_field_bits
3215 for (scan
= fip
->list
; scan
!= NULL
; scan
= scan
->next
)
3218 if (scan
->visibility
!= VISIBILITY_PUBLIC
)
3220 non_public_fields
++;
3224 /* Now we know how many fields there are, and whether or not there are any
3225 non-public fields. Record the field count, allocate space for the
3226 array of fields, and create blank visibility bitfields if necessary. */
3228 TYPE_NFIELDS (type
) = nfields
;
3229 TYPE_FIELDS (type
) = (struct field
*)
3230 TYPE_ALLOC (type
, sizeof (struct field
) * nfields
);
3231 memset (TYPE_FIELDS (type
), 0, sizeof (struct field
) * nfields
);
3233 if (non_public_fields
)
3235 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
3237 TYPE_FIELD_PRIVATE_BITS (type
) =
3238 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
3239 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type
), nfields
);
3241 TYPE_FIELD_PROTECTED_BITS (type
) =
3242 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
3243 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type
), nfields
);
3245 TYPE_FIELD_IGNORE_BITS (type
) =
3246 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
3247 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type
), nfields
);
3250 /* Copy the saved-up fields into the field vector. Start from the head
3251 of the list, adding to the tail of the field array, so that they end
3252 up in the same order in the array in which they were added to the list. */
3254 while (nfields
-- > 0)
3256 TYPE_FIELD (type
, nfields
) = fip
->list
->field
;
3257 switch (fip
->list
->visibility
)
3259 case VISIBILITY_PRIVATE
:
3260 SET_TYPE_FIELD_PRIVATE (type
, nfields
);
3263 case VISIBILITY_PROTECTED
:
3264 SET_TYPE_FIELD_PROTECTED (type
, nfields
);
3267 case VISIBILITY_IGNORE
:
3268 SET_TYPE_FIELD_IGNORE (type
, nfields
);
3271 case VISIBILITY_PUBLIC
:
3275 /* Unknown visibility. Complain and treat it as public. */
3277 complaint (&symfile_complaints
, _("Unknown visibility `%c' for field"),
3278 fip
->list
->visibility
);
3282 fip
->list
= fip
->list
->next
;
3288 /* Complain that the compiler has emitted more than one definition for the
3289 structure type TYPE. */
3291 complain_about_struct_wipeout (struct type
*type
)
3296 if (TYPE_TAG_NAME (type
))
3298 name
= TYPE_TAG_NAME (type
);
3299 switch (TYPE_CODE (type
))
3301 case TYPE_CODE_STRUCT
: kind
= "struct "; break;
3302 case TYPE_CODE_UNION
: kind
= "union "; break;
3303 case TYPE_CODE_ENUM
: kind
= "enum "; break;
3307 else if (TYPE_NAME (type
))
3309 name
= TYPE_NAME (type
);
3318 complaint (&symfile_complaints
,
3319 _("struct/union type gets multiply defined: %s%s"), kind
, name
);
3323 /* Read the description of a structure (or union type) and return an object
3324 describing the type.
3326 PP points to a character pointer that points to the next unconsumed token
3327 in the the stabs string. For example, given stabs "A:T4=s4a:1,0,32;;",
3328 *PP will point to "4a:1,0,32;;".
3330 TYPE points to an incomplete type that needs to be filled in.
3332 OBJFILE points to the current objfile from which the stabs information is
3333 being read. (Note that it is redundant in that TYPE also contains a pointer
3334 to this same objfile, so it might be a good idea to eliminate it. FIXME).
3337 static struct type
*
3338 read_struct_type (char **pp
, struct type
*type
, enum type_code type_code
,
3339 struct objfile
*objfile
)
3341 struct cleanup
*back_to
;
3342 struct field_info fi
;
3347 /* When describing struct/union/class types in stabs, G++ always drops
3348 all qualifications from the name. So if you've got:
3349 struct A { ... struct B { ... }; ... };
3350 then G++ will emit stabs for `struct A::B' that call it simply
3351 `struct B'. Obviously, if you've got a real top-level definition for
3352 `struct B', or other nested definitions, this is going to cause
3355 Obviously, GDB can't fix this by itself, but it can at least avoid
3356 scribbling on existing structure type objects when new definitions
3358 if (! (TYPE_CODE (type
) == TYPE_CODE_UNDEF
3359 || TYPE_STUB (type
)))
3361 complain_about_struct_wipeout (type
);
3363 /* It's probably best to return the type unchanged. */
3367 back_to
= make_cleanup (null_cleanup
, 0);
3369 INIT_CPLUS_SPECIFIC (type
);
3370 TYPE_CODE (type
) = type_code
;
3371 TYPE_STUB (type
) = 0;
3373 /* First comes the total size in bytes. */
3377 TYPE_LENGTH (type
) = read_huge_number (pp
, 0, &nbits
, 0);
3379 return error_type (pp
, objfile
);
3382 /* Now read the baseclasses, if any, read the regular C struct or C++
3383 class member fields, attach the fields to the type, read the C++
3384 member functions, attach them to the type, and then read any tilde
3385 field (baseclass specifier for the class holding the main vtable). */
3387 if (!read_baseclasses (&fi
, pp
, type
, objfile
)
3388 || !read_struct_fields (&fi
, pp
, type
, objfile
)
3389 || !attach_fields_to_type (&fi
, type
, objfile
)
3390 || !read_member_functions (&fi
, pp
, type
, objfile
)
3391 || !attach_fn_fields_to_type (&fi
, type
)
3392 || !read_tilde_fields (&fi
, pp
, type
, objfile
))
3394 type
= error_type (pp
, objfile
);
3397 do_cleanups (back_to
);
3401 /* Read a definition of an array type,
3402 and create and return a suitable type object.
3403 Also creates a range type which represents the bounds of that
3406 static struct type
*
3407 read_array_type (char **pp
, struct type
*type
,
3408 struct objfile
*objfile
)
3410 struct type
*index_type
, *element_type
, *range_type
;
3415 /* Format of an array type:
3416 "ar<index type>;lower;upper;<array_contents_type>".
3417 OS9000: "arlower,upper;<array_contents_type>".
3419 Fortran adjustable arrays use Adigits or Tdigits for lower or upper;
3420 for these, produce a type like float[][]. */
3423 index_type
= read_type (pp
, objfile
);
3425 /* Improper format of array type decl. */
3426 return error_type (pp
, objfile
);
3430 if (!(**pp
>= '0' && **pp
<= '9') && **pp
!= '-')
3435 lower
= read_huge_number (pp
, ';', &nbits
, 0);
3438 return error_type (pp
, objfile
);
3440 if (!(**pp
>= '0' && **pp
<= '9') && **pp
!= '-')
3445 upper
= read_huge_number (pp
, ';', &nbits
, 0);
3447 return error_type (pp
, objfile
);
3449 element_type
= read_type (pp
, objfile
);
3458 create_range_type ((struct type
*) NULL
, index_type
, lower
, upper
);
3459 type
= create_array_type (type
, element_type
, range_type
);
3465 /* Read a definition of an enumeration type,
3466 and create and return a suitable type object.
3467 Also defines the symbols that represent the values of the type. */
3469 static struct type
*
3470 read_enum_type (char **pp
, struct type
*type
,
3471 struct objfile
*objfile
)
3473 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
3479 struct pending
**symlist
;
3480 struct pending
*osyms
, *syms
;
3483 int unsigned_enum
= 1;
3486 /* FIXME! The stabs produced by Sun CC merrily define things that ought
3487 to be file-scope, between N_FN entries, using N_LSYM. What's a mother
3488 to do? For now, force all enum values to file scope. */
3489 if (within_function
)
3490 symlist
= &local_symbols
;
3493 symlist
= &file_symbols
;
3495 o_nsyms
= osyms
? osyms
->nsyms
: 0;
3497 /* The aix4 compiler emits an extra field before the enum members;
3498 my guess is it's a type of some sort. Just ignore it. */
3501 /* Skip over the type. */
3505 /* Skip over the colon. */
3509 /* Read the value-names and their values.
3510 The input syntax is NAME:VALUE,NAME:VALUE, and so on.
3511 A semicolon or comma instead of a NAME means the end. */
3512 while (**pp
&& **pp
!= ';' && **pp
!= ',')
3514 STABS_CONTINUE (pp
, objfile
);
3518 name
= obsavestring (*pp
, p
- *pp
, &objfile
->objfile_obstack
);
3520 n
= read_huge_number (pp
, ',', &nbits
, 0);
3522 return error_type (pp
, objfile
);
3524 sym
= (struct symbol
*)
3525 obstack_alloc (&objfile
->objfile_obstack
, sizeof (struct symbol
));
3526 memset (sym
, 0, sizeof (struct symbol
));
3527 SYMBOL_SET_LINKAGE_NAME (sym
, name
);
3528 SYMBOL_LANGUAGE (sym
) = current_subfile
->language
;
3529 SYMBOL_CLASS (sym
) = LOC_CONST
;
3530 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
3531 SYMBOL_VALUE (sym
) = n
;
3534 add_symbol_to_list (sym
, symlist
);
3539 (*pp
)++; /* Skip the semicolon. */
3541 /* Now fill in the fields of the type-structure. */
3543 TYPE_LENGTH (type
) = gdbarch_int_bit (gdbarch
) / HOST_CHAR_BIT
;
3544 TYPE_CODE (type
) = TYPE_CODE_ENUM
;
3545 TYPE_STUB (type
) = 0;
3547 TYPE_UNSIGNED (type
) = 1;
3548 TYPE_NFIELDS (type
) = nsyms
;
3549 TYPE_FIELDS (type
) = (struct field
*)
3550 TYPE_ALLOC (type
, sizeof (struct field
) * nsyms
);
3551 memset (TYPE_FIELDS (type
), 0, sizeof (struct field
) * nsyms
);
3553 /* Find the symbols for the values and put them into the type.
3554 The symbols can be found in the symlist that we put them on
3555 to cause them to be defined. osyms contains the old value
3556 of that symlist; everything up to there was defined by us. */
3557 /* Note that we preserve the order of the enum constants, so
3558 that in something like "enum {FOO, LAST_THING=FOO}" we print
3559 FOO, not LAST_THING. */
3561 for (syms
= *symlist
, n
= nsyms
- 1; syms
; syms
= syms
->next
)
3563 int last
= syms
== osyms
? o_nsyms
: 0;
3564 int j
= syms
->nsyms
;
3565 for (; --j
>= last
; --n
)
3567 struct symbol
*xsym
= syms
->symbol
[j
];
3568 SYMBOL_TYPE (xsym
) = type
;
3569 TYPE_FIELD_NAME (type
, n
) = SYMBOL_LINKAGE_NAME (xsym
);
3570 TYPE_FIELD_BITPOS (type
, n
) = SYMBOL_VALUE (xsym
);
3571 TYPE_FIELD_BITSIZE (type
, n
) = 0;
3580 /* Sun's ACC uses a somewhat saner method for specifying the builtin
3581 typedefs in every file (for int, long, etc):
3583 type = b <signed> <width> <format type>; <offset>; <nbits>
3585 optional format type = c or b for char or boolean.
3586 offset = offset from high order bit to start bit of type.
3587 width is # bytes in object of this type, nbits is # bits in type.
3589 The width/offset stuff appears to be for small objects stored in
3590 larger ones (e.g. `shorts' in `int' registers). We ignore it for now,
3593 static struct type
*
3594 read_sun_builtin_type (char **pp
, int typenums
[2], struct objfile
*objfile
)
3599 enum type_code code
= TYPE_CODE_INT
;
3610 return error_type (pp
, objfile
);
3614 /* For some odd reason, all forms of char put a c here. This is strange
3615 because no other type has this honor. We can safely ignore this because
3616 we actually determine 'char'acterness by the number of bits specified in
3618 Boolean forms, e.g Fortran logical*X, put a b here. */
3622 else if (**pp
== 'b')
3624 code
= TYPE_CODE_BOOL
;
3628 /* The first number appears to be the number of bytes occupied
3629 by this type, except that unsigned short is 4 instead of 2.
3630 Since this information is redundant with the third number,
3631 we will ignore it. */
3632 read_huge_number (pp
, ';', &nbits
, 0);
3634 return error_type (pp
, objfile
);
3636 /* The second number is always 0, so ignore it too. */
3637 read_huge_number (pp
, ';', &nbits
, 0);
3639 return error_type (pp
, objfile
);
3641 /* The third number is the number of bits for this type. */
3642 type_bits
= read_huge_number (pp
, 0, &nbits
, 0);
3644 return error_type (pp
, objfile
);
3645 /* The type *should* end with a semicolon. If it are embedded
3646 in a larger type the semicolon may be the only way to know where
3647 the type ends. If this type is at the end of the stabstring we
3648 can deal with the omitted semicolon (but we don't have to like
3649 it). Don't bother to complain(), Sun's compiler omits the semicolon
3655 return init_type (TYPE_CODE_VOID
, 1,
3656 signed_type
? 0 : TYPE_FLAG_UNSIGNED
, (char *) NULL
,
3659 return init_type (code
,
3660 type_bits
/ TARGET_CHAR_BIT
,
3661 signed_type
? 0 : TYPE_FLAG_UNSIGNED
, (char *) NULL
,
3665 static struct type
*
3666 read_sun_floating_type (char **pp
, int typenums
[2], struct objfile
*objfile
)
3671 struct type
*rettype
;
3673 /* The first number has more details about the type, for example
3675 details
= read_huge_number (pp
, ';', &nbits
, 0);
3677 return error_type (pp
, objfile
);
3679 /* The second number is the number of bytes occupied by this type */
3680 nbytes
= read_huge_number (pp
, ';', &nbits
, 0);
3682 return error_type (pp
, objfile
);
3684 if (details
== NF_COMPLEX
|| details
== NF_COMPLEX16
3685 || details
== NF_COMPLEX32
)
3687 rettype
= init_type (TYPE_CODE_COMPLEX
, nbytes
, 0, NULL
, objfile
);
3688 TYPE_TARGET_TYPE (rettype
)
3689 = init_type (TYPE_CODE_FLT
, nbytes
/ 2, 0, NULL
, objfile
);
3693 return init_type (TYPE_CODE_FLT
, nbytes
, 0, NULL
, objfile
);
3696 /* Read a number from the string pointed to by *PP.
3697 The value of *PP is advanced over the number.
3698 If END is nonzero, the character that ends the
3699 number must match END, or an error happens;
3700 and that character is skipped if it does match.
3701 If END is zero, *PP is left pointing to that character.
3703 If TWOS_COMPLEMENT_BITS is set to a strictly positive value and if
3704 the number is represented in an octal representation, assume that
3705 it is represented in a 2's complement representation with a size of
3706 TWOS_COMPLEMENT_BITS.
3708 If the number fits in a long, set *BITS to 0 and return the value.
3709 If not, set *BITS to be the number of bits in the number and return 0.
3711 If encounter garbage, set *BITS to -1 and return 0. */
3714 read_huge_number (char **pp
, int end
, int *bits
, int twos_complement_bits
)
3725 int twos_complement_representation
= 0;
3733 /* Leading zero means octal. GCC uses this to output values larger
3734 than an int (because that would be hard in decimal). */
3741 /* Skip extra zeros. */
3745 if (sign
> 0 && radix
== 8 && twos_complement_bits
> 0)
3747 /* Octal, possibly signed. Check if we have enough chars for a
3752 while ((c
= *p1
) >= '0' && c
< '8')
3756 if (len
> twos_complement_bits
/ 3
3757 || (twos_complement_bits
% 3 == 0 && len
== twos_complement_bits
/ 3))
3759 /* Ok, we have enough characters for a signed value, check
3760 for signness by testing if the sign bit is set. */
3761 sign_bit
= (twos_complement_bits
% 3 + 2) % 3;
3763 if (c
& (1 << sign_bit
))
3765 /* Definitely signed. */
3766 twos_complement_representation
= 1;
3772 upper_limit
= LONG_MAX
/ radix
;
3774 while ((c
= *p
++) >= '0' && c
< ('0' + radix
))
3776 if (n
<= upper_limit
)
3778 if (twos_complement_representation
)
3780 /* Octal, signed, twos complement representation. In
3781 this case, n is the corresponding absolute value. */
3784 long sn
= c
- '0' - ((2 * (c
- '0')) | (2 << sign_bit
));
3795 /* unsigned representation */
3797 n
+= c
- '0'; /* FIXME this overflows anyway */
3803 /* This depends on large values being output in octal, which is
3810 /* Ignore leading zeroes. */
3814 else if (c
== '2' || c
== '3')
3835 if (radix
== 8 && twos_complement_bits
> 0 && nbits
> twos_complement_bits
)
3837 /* We were supposed to parse a number with maximum
3838 TWOS_COMPLEMENT_BITS bits, but something went wrong. */
3849 /* Large decimal constants are an error (because it is hard to
3850 count how many bits are in them). */
3856 /* -0x7f is the same as 0x80. So deal with it by adding one to
3857 the number of bits. Two's complement represention octals
3858 can't have a '-' in front. */
3859 if (sign
== -1 && !twos_complement_representation
)
3870 /* It's *BITS which has the interesting information. */
3874 static struct type
*
3875 read_range_type (char **pp
, int typenums
[2], int type_size
,
3876 struct objfile
*objfile
)
3878 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
3879 char *orig_pp
= *pp
;
3884 struct type
*result_type
;
3885 struct type
*index_type
= NULL
;
3887 /* First comes a type we are a subrange of.
3888 In C it is usually 0, 1 or the type being defined. */
3889 if (read_type_number (pp
, rangenums
) != 0)
3890 return error_type (pp
, objfile
);
3891 self_subrange
= (rangenums
[0] == typenums
[0] &&
3892 rangenums
[1] == typenums
[1]);
3897 index_type
= read_type (pp
, objfile
);
3900 /* A semicolon should now follow; skip it. */
3904 /* The remaining two operands are usually lower and upper bounds
3905 of the range. But in some special cases they mean something else. */
3906 n2
= read_huge_number (pp
, ';', &n2bits
, type_size
);
3907 n3
= read_huge_number (pp
, ';', &n3bits
, type_size
);
3909 if (n2bits
== -1 || n3bits
== -1)
3910 return error_type (pp
, objfile
);
3913 goto handle_true_range
;
3915 /* If limits are huge, must be large integral type. */
3916 if (n2bits
!= 0 || n3bits
!= 0)
3918 char got_signed
= 0;
3919 char got_unsigned
= 0;
3920 /* Number of bits in the type. */
3923 /* If a type size attribute has been specified, the bounds of
3924 the range should fit in this size. If the lower bounds needs
3925 more bits than the upper bound, then the type is signed. */
3926 if (n2bits
<= type_size
&& n3bits
<= type_size
)
3928 if (n2bits
== type_size
&& n2bits
> n3bits
)
3934 /* Range from 0 to <large number> is an unsigned large integral type. */
3935 else if ((n2bits
== 0 && n2
== 0) && n3bits
!= 0)
3940 /* Range from <large number> to <large number>-1 is a large signed
3941 integral type. Take care of the case where <large number> doesn't
3942 fit in a long but <large number>-1 does. */
3943 else if ((n2bits
!= 0 && n3bits
!= 0 && n2bits
== n3bits
+ 1)
3944 || (n2bits
!= 0 && n3bits
== 0
3945 && (n2bits
== sizeof (long) * HOST_CHAR_BIT
)
3952 if (got_signed
|| got_unsigned
)
3954 return init_type (TYPE_CODE_INT
, nbits
/ TARGET_CHAR_BIT
,
3955 got_unsigned
? TYPE_FLAG_UNSIGNED
: 0, NULL
,
3959 return error_type (pp
, objfile
);
3962 /* A type defined as a subrange of itself, with bounds both 0, is void. */
3963 if (self_subrange
&& n2
== 0 && n3
== 0)
3964 return init_type (TYPE_CODE_VOID
, 1, 0, NULL
, objfile
);
3966 /* If n3 is zero and n2 is positive, we want a floating type, and n2
3967 is the width in bytes.
3969 Fortran programs appear to use this for complex types also. To
3970 distinguish between floats and complex, g77 (and others?) seem
3971 to use self-subranges for the complexes, and subranges of int for
3974 Also note that for complexes, g77 sets n2 to the size of one of
3975 the member floats, not the whole complex beast. My guess is that
3976 this was to work well with pre-COMPLEX versions of gdb. */
3978 if (n3
== 0 && n2
> 0)
3980 struct type
*float_type
3981 = init_type (TYPE_CODE_FLT
, n2
, 0, NULL
, objfile
);
3985 struct type
*complex_type
=
3986 init_type (TYPE_CODE_COMPLEX
, 2 * n2
, 0, NULL
, objfile
);
3987 TYPE_TARGET_TYPE (complex_type
) = float_type
;
3988 return complex_type
;
3994 /* If the upper bound is -1, it must really be an unsigned integral. */
3996 else if (n2
== 0 && n3
== -1)
3998 int bits
= type_size
;
4001 /* We don't know its size. It is unsigned int or unsigned
4002 long. GCC 2.3.3 uses this for long long too, but that is
4003 just a GDB 3.5 compatibility hack. */
4004 bits
= gdbarch_int_bit (gdbarch
);
4007 return init_type (TYPE_CODE_INT
, bits
/ TARGET_CHAR_BIT
,
4008 TYPE_FLAG_UNSIGNED
, NULL
, objfile
);
4011 /* Special case: char is defined (Who knows why) as a subrange of
4012 itself with range 0-127. */
4013 else if (self_subrange
&& n2
== 0 && n3
== 127)
4014 return init_type (TYPE_CODE_INT
, 1, TYPE_FLAG_NOSIGN
, NULL
, objfile
);
4016 /* We used to do this only for subrange of self or subrange of int. */
4019 /* -1 is used for the upper bound of (4 byte) "unsigned int" and
4020 "unsigned long", and we already checked for that,
4021 so don't need to test for it here. */
4024 /* n3 actually gives the size. */
4025 return init_type (TYPE_CODE_INT
, -n3
, TYPE_FLAG_UNSIGNED
,
4028 /* Is n3 == 2**(8n)-1 for some integer n? Then it's an
4029 unsigned n-byte integer. But do require n to be a power of
4030 two; we don't want 3- and 5-byte integers flying around. */
4036 for (bytes
= 0; (bits
& 0xff) == 0xff; bytes
++)
4039 && ((bytes
- 1) & bytes
) == 0) /* "bytes is a power of two" */
4040 return init_type (TYPE_CODE_INT
, bytes
, TYPE_FLAG_UNSIGNED
, NULL
,
4044 /* I think this is for Convex "long long". Since I don't know whether
4045 Convex sets self_subrange, I also accept that particular size regardless
4046 of self_subrange. */
4047 else if (n3
== 0 && n2
< 0
4049 || n2
== -gdbarch_long_long_bit
4050 (gdbarch
) / TARGET_CHAR_BIT
))
4051 return init_type (TYPE_CODE_INT
, -n2
, 0, NULL
, objfile
);
4052 else if (n2
== -n3
- 1)
4055 return init_type (TYPE_CODE_INT
, 1, 0, NULL
, objfile
);
4057 return init_type (TYPE_CODE_INT
, 2, 0, NULL
, objfile
);
4058 if (n3
== 0x7fffffff)
4059 return init_type (TYPE_CODE_INT
, 4, 0, NULL
, objfile
);
4062 /* We have a real range type on our hands. Allocate space and
4063 return a real pointer. */
4067 index_type
= builtin_type (gdbarch
)->builtin_int
;
4069 index_type
= *dbx_lookup_type (rangenums
);
4070 if (index_type
== NULL
)
4072 /* Does this actually ever happen? Is that why we are worrying
4073 about dealing with it rather than just calling error_type? */
4075 complaint (&symfile_complaints
,
4076 _("base type %d of range type is not defined"), rangenums
[1]);
4078 index_type
= builtin_type (gdbarch
)->builtin_int
;
4081 result_type
= create_range_type ((struct type
*) NULL
, index_type
, n2
, n3
);
4082 return (result_type
);
4085 /* Read in an argument list. This is a list of types, separated by commas
4086 and terminated with END. Return the list of types read in, or NULL
4087 if there is an error. */
4089 static struct field
*
4090 read_args (char **pp
, int end
, struct objfile
*objfile
, int *nargsp
,
4093 /* FIXME! Remove this arbitrary limit! */
4094 struct type
*types
[1024]; /* allow for fns of 1023 parameters */
4101 /* Invalid argument list: no ','. */
4104 STABS_CONTINUE (pp
, objfile
);
4105 types
[n
++] = read_type (pp
, objfile
);
4107 (*pp
)++; /* get past `end' (the ':' character) */
4109 if (TYPE_CODE (types
[n
- 1]) != TYPE_CODE_VOID
)
4117 rval
= (struct field
*) xmalloc (n
* sizeof (struct field
));
4118 memset (rval
, 0, n
* sizeof (struct field
));
4119 for (i
= 0; i
< n
; i
++)
4120 rval
[i
].type
= types
[i
];
4125 /* Common block handling. */
4127 /* List of symbols declared since the last BCOMM. This list is a tail
4128 of local_symbols. When ECOMM is seen, the symbols on the list
4129 are noted so their proper addresses can be filled in later,
4130 using the common block base address gotten from the assembler
4133 static struct pending
*common_block
;
4134 static int common_block_i
;
4136 /* Name of the current common block. We get it from the BCOMM instead of the
4137 ECOMM to match IBM documentation (even though IBM puts the name both places
4138 like everyone else). */
4139 static char *common_block_name
;
4141 /* Process a N_BCOMM symbol. The storage for NAME is not guaranteed
4142 to remain after this function returns. */
4145 common_block_start (char *name
, struct objfile
*objfile
)
4147 if (common_block_name
!= NULL
)
4149 complaint (&symfile_complaints
,
4150 _("Invalid symbol data: common block within common block"));
4152 common_block
= local_symbols
;
4153 common_block_i
= local_symbols
? local_symbols
->nsyms
: 0;
4154 common_block_name
= obsavestring (name
, strlen (name
),
4155 &objfile
->objfile_obstack
);
4158 /* Process a N_ECOMM symbol. */
4161 common_block_end (struct objfile
*objfile
)
4163 /* Symbols declared since the BCOMM are to have the common block
4164 start address added in when we know it. common_block and
4165 common_block_i point to the first symbol after the BCOMM in
4166 the local_symbols list; copy the list and hang it off the
4167 symbol for the common block name for later fixup. */
4170 struct pending
*new = 0;
4171 struct pending
*next
;
4174 if (common_block_name
== NULL
)
4176 complaint (&symfile_complaints
, _("ECOMM symbol unmatched by BCOMM"));
4180 sym
= (struct symbol
*)
4181 obstack_alloc (&objfile
->objfile_obstack
, sizeof (struct symbol
));
4182 memset (sym
, 0, sizeof (struct symbol
));
4183 /* Note: common_block_name already saved on objfile_obstack */
4184 SYMBOL_SET_LINKAGE_NAME (sym
, common_block_name
);
4185 SYMBOL_CLASS (sym
) = LOC_BLOCK
;
4187 /* Now we copy all the symbols which have been defined since the BCOMM. */
4189 /* Copy all the struct pendings before common_block. */
4190 for (next
= local_symbols
;
4191 next
!= NULL
&& next
!= common_block
;
4194 for (j
= 0; j
< next
->nsyms
; j
++)
4195 add_symbol_to_list (next
->symbol
[j
], &new);
4198 /* Copy however much of COMMON_BLOCK we need. If COMMON_BLOCK is
4199 NULL, it means copy all the local symbols (which we already did
4202 if (common_block
!= NULL
)
4203 for (j
= common_block_i
; j
< common_block
->nsyms
; j
++)
4204 add_symbol_to_list (common_block
->symbol
[j
], &new);
4206 SYMBOL_TYPE (sym
) = (struct type
*) new;
4208 /* Should we be putting local_symbols back to what it was?
4211 i
= hashname (SYMBOL_LINKAGE_NAME (sym
));
4212 SYMBOL_VALUE_CHAIN (sym
) = global_sym_chain
[i
];
4213 global_sym_chain
[i
] = sym
;
4214 common_block_name
= NULL
;
4217 /* Add a common block's start address to the offset of each symbol
4218 declared to be in it (by being between a BCOMM/ECOMM pair that uses
4219 the common block name). */
4222 fix_common_block (struct symbol
*sym
, int valu
)
4224 struct pending
*next
= (struct pending
*) SYMBOL_TYPE (sym
);
4225 for (; next
; next
= next
->next
)
4228 for (j
= next
->nsyms
- 1; j
>= 0; j
--)
4229 SYMBOL_VALUE_ADDRESS (next
->symbol
[j
]) += valu
;
4235 /* Add {TYPE, TYPENUMS} to the NONAME_UNDEFS vector.
4236 See add_undefined_type for more details. */
4239 add_undefined_type_noname (struct type
*type
, int typenums
[2])
4243 nat
.typenums
[0] = typenums
[0];
4244 nat
.typenums
[1] = typenums
[1];
4247 if (noname_undefs_length
== noname_undefs_allocated
)
4249 noname_undefs_allocated
*= 2;
4250 noname_undefs
= (struct nat
*)
4251 xrealloc ((char *) noname_undefs
,
4252 noname_undefs_allocated
* sizeof (struct nat
));
4254 noname_undefs
[noname_undefs_length
++] = nat
;
4257 /* Add TYPE to the UNDEF_TYPES vector.
4258 See add_undefined_type for more details. */
4261 add_undefined_type_1 (struct type
*type
)
4263 if (undef_types_length
== undef_types_allocated
)
4265 undef_types_allocated
*= 2;
4266 undef_types
= (struct type
**)
4267 xrealloc ((char *) undef_types
,
4268 undef_types_allocated
* sizeof (struct type
*));
4270 undef_types
[undef_types_length
++] = type
;
4273 /* What about types defined as forward references inside of a small lexical
4275 /* Add a type to the list of undefined types to be checked through
4276 once this file has been read in.
4278 In practice, we actually maintain two such lists: The first list
4279 (UNDEF_TYPES) is used for types whose name has been provided, and
4280 concerns forward references (eg 'xs' or 'xu' forward references);
4281 the second list (NONAME_UNDEFS) is used for types whose name is
4282 unknown at creation time, because they were referenced through
4283 their type number before the actual type was declared.
4284 This function actually adds the given type to the proper list. */
4287 add_undefined_type (struct type
*type
, int typenums
[2])
4289 if (TYPE_TAG_NAME (type
) == NULL
)
4290 add_undefined_type_noname (type
, typenums
);
4292 add_undefined_type_1 (type
);
4295 /* Try to fix all undefined types pushed on the UNDEF_TYPES vector. */
4298 cleanup_undefined_types_noname (void)
4302 for (i
= 0; i
< noname_undefs_length
; i
++)
4304 struct nat nat
= noname_undefs
[i
];
4307 type
= dbx_lookup_type (nat
.typenums
);
4308 if (nat
.type
!= *type
&& TYPE_CODE (*type
) != TYPE_CODE_UNDEF
)
4310 /* The instance flags of the undefined type are still unset,
4311 and needs to be copied over from the reference type.
4312 Since replace_type expects them to be identical, we need
4313 to set these flags manually before hand. */
4314 TYPE_INSTANCE_FLAGS (nat
.type
) = TYPE_INSTANCE_FLAGS (*type
);
4315 replace_type (nat
.type
, *type
);
4319 noname_undefs_length
= 0;
4322 /* Go through each undefined type, see if it's still undefined, and fix it
4323 up if possible. We have two kinds of undefined types:
4325 TYPE_CODE_ARRAY: Array whose target type wasn't defined yet.
4326 Fix: update array length using the element bounds
4327 and the target type's length.
4328 TYPE_CODE_STRUCT, TYPE_CODE_UNION: Structure whose fields were not
4329 yet defined at the time a pointer to it was made.
4330 Fix: Do a full lookup on the struct/union tag. */
4333 cleanup_undefined_types_1 (void)
4337 /* Iterate over every undefined type, and look for a symbol whose type
4338 matches our undefined type. The symbol matches if:
4339 1. It is a typedef in the STRUCT domain;
4340 2. It has the same name, and same type code;
4341 3. The instance flags are identical.
4343 It is important to check the instance flags, because we have seen
4344 examples where the debug info contained definitions such as:
4346 "foo_t:t30=B31=xefoo_t:"
4348 In this case, we have created an undefined type named "foo_t" whose
4349 instance flags is null (when processing "xefoo_t"), and then created
4350 another type with the same name, but with different instance flags
4351 ('B' means volatile). I think that the definition above is wrong,
4352 since the same type cannot be volatile and non-volatile at the same
4353 time, but we need to be able to cope with it when it happens. The
4354 approach taken here is to treat these two types as different. */
4356 for (type
= undef_types
; type
< undef_types
+ undef_types_length
; type
++)
4358 switch (TYPE_CODE (*type
))
4361 case TYPE_CODE_STRUCT
:
4362 case TYPE_CODE_UNION
:
4363 case TYPE_CODE_ENUM
:
4365 /* Check if it has been defined since. Need to do this here
4366 as well as in check_typedef to deal with the (legitimate in
4367 C though not C++) case of several types with the same name
4368 in different source files. */
4369 if (TYPE_STUB (*type
))
4371 struct pending
*ppt
;
4373 /* Name of the type, without "struct" or "union" */
4374 char *typename
= TYPE_TAG_NAME (*type
);
4376 if (typename
== NULL
)
4378 complaint (&symfile_complaints
, _("need a type name"));
4381 for (ppt
= file_symbols
; ppt
; ppt
= ppt
->next
)
4383 for (i
= 0; i
< ppt
->nsyms
; i
++)
4385 struct symbol
*sym
= ppt
->symbol
[i
];
4387 if (SYMBOL_CLASS (sym
) == LOC_TYPEDEF
4388 && SYMBOL_DOMAIN (sym
) == STRUCT_DOMAIN
4389 && (TYPE_CODE (SYMBOL_TYPE (sym
)) ==
4391 && (TYPE_INSTANCE_FLAGS (*type
) ==
4392 TYPE_INSTANCE_FLAGS (SYMBOL_TYPE (sym
)))
4393 && strcmp (SYMBOL_LINKAGE_NAME (sym
),
4395 replace_type (*type
, SYMBOL_TYPE (sym
));
4404 complaint (&symfile_complaints
,
4405 _("forward-referenced types left unresolved, "
4413 undef_types_length
= 0;
4416 /* Try to fix all the undefined types we ecountered while processing
4420 cleanup_undefined_types (void)
4422 cleanup_undefined_types_1 ();
4423 cleanup_undefined_types_noname ();
4426 /* Scan through all of the global symbols defined in the object file,
4427 assigning values to the debugging symbols that need to be assigned
4428 to. Get these symbols from the minimal symbol table. */
4431 scan_file_globals (struct objfile
*objfile
)
4434 struct minimal_symbol
*msymbol
;
4435 struct symbol
*sym
, *prev
;
4436 struct objfile
*resolve_objfile
;
4438 /* SVR4 based linkers copy referenced global symbols from shared
4439 libraries to the main executable.
4440 If we are scanning the symbols for a shared library, try to resolve
4441 them from the minimal symbols of the main executable first. */
4443 if (symfile_objfile
&& objfile
!= symfile_objfile
)
4444 resolve_objfile
= symfile_objfile
;
4446 resolve_objfile
= objfile
;
4450 /* Avoid expensive loop through all minimal symbols if there are
4451 no unresolved symbols. */
4452 for (hash
= 0; hash
< HASHSIZE
; hash
++)
4454 if (global_sym_chain
[hash
])
4457 if (hash
>= HASHSIZE
)
4460 ALL_OBJFILE_MSYMBOLS (resolve_objfile
, msymbol
)
4464 /* Skip static symbols. */
4465 switch (MSYMBOL_TYPE (msymbol
))
4477 /* Get the hash index and check all the symbols
4478 under that hash index. */
4480 hash
= hashname (SYMBOL_LINKAGE_NAME (msymbol
));
4482 for (sym
= global_sym_chain
[hash
]; sym
;)
4484 if (strcmp (SYMBOL_LINKAGE_NAME (msymbol
),
4485 SYMBOL_LINKAGE_NAME (sym
)) == 0)
4487 /* Splice this symbol out of the hash chain and
4488 assign the value we have to it. */
4491 SYMBOL_VALUE_CHAIN (prev
) = SYMBOL_VALUE_CHAIN (sym
);
4495 global_sym_chain
[hash
] = SYMBOL_VALUE_CHAIN (sym
);
4498 /* Check to see whether we need to fix up a common block. */
4499 /* Note: this code might be executed several times for
4500 the same symbol if there are multiple references. */
4503 if (SYMBOL_CLASS (sym
) == LOC_BLOCK
)
4505 fix_common_block (sym
,
4506 SYMBOL_VALUE_ADDRESS (msymbol
));
4510 SYMBOL_VALUE_ADDRESS (sym
)
4511 = SYMBOL_VALUE_ADDRESS (msymbol
);
4513 SYMBOL_SECTION (sym
) = SYMBOL_SECTION (msymbol
);
4518 sym
= SYMBOL_VALUE_CHAIN (prev
);
4522 sym
= global_sym_chain
[hash
];
4528 sym
= SYMBOL_VALUE_CHAIN (sym
);
4532 if (resolve_objfile
== objfile
)
4534 resolve_objfile
= objfile
;
4537 /* Change the storage class of any remaining unresolved globals to
4538 LOC_UNRESOLVED and remove them from the chain. */
4539 for (hash
= 0; hash
< HASHSIZE
; hash
++)
4541 sym
= global_sym_chain
[hash
];
4545 sym
= SYMBOL_VALUE_CHAIN (sym
);
4547 /* Change the symbol address from the misleading chain value
4549 SYMBOL_VALUE_ADDRESS (prev
) = 0;
4551 /* Complain about unresolved common block symbols. */
4552 if (SYMBOL_CLASS (prev
) == LOC_STATIC
)
4553 SYMBOL_CLASS (prev
) = LOC_UNRESOLVED
;
4555 complaint (&symfile_complaints
,
4556 _("%s: common block `%s' from global_sym_chain unresolved"),
4557 objfile
->name
, SYMBOL_PRINT_NAME (prev
));
4560 memset (global_sym_chain
, 0, sizeof (global_sym_chain
));
4563 /* Initialize anything that needs initializing when starting to read
4564 a fresh piece of a symbol file, e.g. reading in the stuff corresponding
4568 stabsread_init (void)
4572 /* Initialize anything that needs initializing when a completely new
4573 symbol file is specified (not just adding some symbols from another
4574 file, e.g. a shared library). */
4577 stabsread_new_init (void)
4579 /* Empty the hash table of global syms looking for values. */
4580 memset (global_sym_chain
, 0, sizeof (global_sym_chain
));
4583 /* Initialize anything that needs initializing at the same time as
4584 start_symtab() is called. */
4589 global_stabs
= NULL
; /* AIX COFF */
4590 /* Leave FILENUM of 0 free for builtin types and this file's types. */
4591 n_this_object_header_files
= 1;
4592 type_vector_length
= 0;
4593 type_vector
= (struct type
**) 0;
4595 /* FIXME: If common_block_name is not already NULL, we should complain(). */
4596 common_block_name
= NULL
;
4599 /* Call after end_symtab() */
4606 xfree (type_vector
);
4609 type_vector_length
= 0;
4610 previous_stab_code
= 0;
4614 finish_global_stabs (struct objfile
*objfile
)
4618 patch_block_stabs (global_symbols
, global_stabs
, objfile
);
4619 xfree (global_stabs
);
4620 global_stabs
= NULL
;
4624 /* Find the end of the name, delimited by a ':', but don't match
4625 ObjC symbols which look like -[Foo bar::]:bla. */
4627 find_name_end (char *name
)
4630 if (s
[0] == '-' || *s
== '+')
4632 /* Must be an ObjC method symbol. */
4635 error (_("invalid symbol name \"%s\""), name
);
4637 s
= strchr (s
, ']');
4640 error (_("invalid symbol name \"%s\""), name
);
4642 return strchr (s
, ':');
4646 return strchr (s
, ':');
4650 /* Initializer for this module */
4653 _initialize_stabsread (void)
4655 undef_types_allocated
= 20;
4656 undef_types_length
= 0;
4657 undef_types
= (struct type
**)
4658 xmalloc (undef_types_allocated
* sizeof (struct type
*));
4660 noname_undefs_allocated
= 20;
4661 noname_undefs_length
= 0;
4662 noname_undefs
= (struct nat
*)
4663 xmalloc (noname_undefs_allocated
* sizeof (struct nat
));