1 /* Support routines for decoding "stabs" debugging information format.
3 Copyright (C) 1986-2017 Free Software Foundation, Inc.
5 This file is part of GDB.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>. */
20 /* Support routines for reading and decoding debugging information in
21 the "stabs" format. This format is used by some systems that use
22 COFF or ELF where the stabs data is placed in a special section (as
23 well as with many old systems that used the a.out object file
24 format). Avoid placing any object file format specific code in
29 #include "gdb_obstack.h"
32 #include "expression.h"
35 #include "aout/stab_gnu.h" /* We always use GNU stabs, not native. */
37 #include "aout/aout64.h"
38 #include "gdb-stabs.h"
40 #include "complaints.h"
42 #include "gdb-demangle.h"
46 #include "cp-support.h"
49 /* Ask stabsread.h to define the vars it normally declares `extern'. */
52 #include "stabsread.h" /* Our own declarations */
55 extern void _initialize_stabsread (void);
59 struct nextfield
*next
;
61 /* This is the raw visibility from the stab. It is not checked
62 for being one of the visibilities we recognize, so code which
63 examines this field better be able to deal. */
69 struct next_fnfieldlist
71 struct next_fnfieldlist
*next
;
72 struct fn_fieldlist fn_fieldlist
;
75 /* The routines that read and process a complete stabs for a C struct or
76 C++ class pass lists of data member fields and lists of member function
77 fields in an instance of a field_info structure, as defined below.
78 This is part of some reorganization of low level C++ support and is
79 expected to eventually go away... (FIXME) */
83 struct nextfield
*list
;
84 struct next_fnfieldlist
*fnlist
;
88 read_one_struct_field (struct field_info
*, char **, char *,
89 struct type
*, struct objfile
*);
91 static struct type
*dbx_alloc_type (int[2], struct objfile
*);
93 static long read_huge_number (char **, int, int *, int);
95 static struct type
*error_type (char **, struct objfile
*);
98 patch_block_stabs (struct pending
*, struct pending_stabs
*,
101 static void fix_common_block (struct symbol
*, CORE_ADDR
);
103 static int read_type_number (char **, int *);
105 static struct type
*read_type (char **, struct objfile
*);
107 static struct type
*read_range_type (char **, int[2], int, struct objfile
*);
109 static struct type
*read_sun_builtin_type (char **, int[2], struct objfile
*);
111 static struct type
*read_sun_floating_type (char **, int[2],
114 static struct type
*read_enum_type (char **, struct type
*, struct objfile
*);
116 static struct type
*rs6000_builtin_type (int, struct objfile
*);
119 read_member_functions (struct field_info
*, char **, struct type
*,
123 read_struct_fields (struct field_info
*, char **, struct type
*,
127 read_baseclasses (struct field_info
*, char **, struct type
*,
131 read_tilde_fields (struct field_info
*, char **, struct type
*,
134 static int attach_fn_fields_to_type (struct field_info
*, struct type
*);
136 static int attach_fields_to_type (struct field_info
*, struct type
*,
139 static struct type
*read_struct_type (char **, struct type
*,
143 static struct type
*read_array_type (char **, struct type
*,
146 static struct field
*read_args (char **, int, struct objfile
*, int *, int *);
148 static void add_undefined_type (struct type
*, int[2]);
151 read_cpp_abbrev (struct field_info
*, char **, struct type
*,
154 static char *find_name_end (char *name
);
156 static int process_reference (char **string
);
158 void stabsread_clear_cache (void);
160 static const char vptr_name
[] = "_vptr$";
161 static const char vb_name
[] = "_vb$";
164 invalid_cpp_abbrev_complaint (const char *arg1
)
166 complaint (&symfile_complaints
, _("invalid C++ abbreviation `%s'"), arg1
);
170 reg_value_complaint (int regnum
, int num_regs
, const char *sym
)
172 complaint (&symfile_complaints
,
173 _("bad register number %d (max %d) in symbol %s"),
174 regnum
, num_regs
- 1, sym
);
178 stabs_general_complaint (const char *arg1
)
180 complaint (&symfile_complaints
, "%s", arg1
);
183 /* Make a list of forward references which haven't been defined. */
185 static struct type
**undef_types
;
186 static int undef_types_allocated
;
187 static int undef_types_length
;
188 static struct symbol
*current_symbol
= NULL
;
190 /* Make a list of nameless types that are undefined.
191 This happens when another type is referenced by its number
192 before this type is actually defined. For instance "t(0,1)=k(0,2)"
193 and type (0,2) is defined only later. */
200 static struct nat
*noname_undefs
;
201 static int noname_undefs_allocated
;
202 static int noname_undefs_length
;
204 /* Check for and handle cretinous stabs symbol name continuation! */
205 #define STABS_CONTINUE(pp,objfile) \
207 if (**(pp) == '\\' || (**(pp) == '?' && (*(pp))[1] == '\0')) \
208 *(pp) = next_symbol_text (objfile); \
211 /* Vector of types defined so far, indexed by their type numbers.
212 (In newer sun systems, dbx uses a pair of numbers in parens,
213 as in "(SUBFILENUM,NUMWITHINSUBFILE)".
214 Then these numbers must be translated through the type_translations
215 hash table to get the index into the type vector.) */
217 static struct type
**type_vector
;
219 /* Number of elements allocated for type_vector currently. */
221 static int type_vector_length
;
223 /* Initial size of type vector. Is realloc'd larger if needed, and
224 realloc'd down to the size actually used, when completed. */
226 #define INITIAL_TYPE_VECTOR_LENGTH 160
229 /* Look up a dbx type-number pair. Return the address of the slot
230 where the type for that number-pair is stored.
231 The number-pair is in TYPENUMS.
233 This can be used for finding the type associated with that pair
234 or for associating a new type with the pair. */
236 static struct type
**
237 dbx_lookup_type (int typenums
[2], struct objfile
*objfile
)
239 int filenum
= typenums
[0];
240 int index
= typenums
[1];
243 struct header_file
*f
;
246 if (filenum
== -1) /* -1,-1 is for temporary types. */
249 if (filenum
< 0 || filenum
>= n_this_object_header_files
)
251 complaint (&symfile_complaints
,
252 _("Invalid symbol data: type number "
253 "(%d,%d) out of range at symtab pos %d."),
254 filenum
, index
, symnum
);
262 /* Caller wants address of address of type. We think
263 that negative (rs6k builtin) types will never appear as
264 "lvalues", (nor should they), so we stuff the real type
265 pointer into a temp, and return its address. If referenced,
266 this will do the right thing. */
267 static struct type
*temp_type
;
269 temp_type
= rs6000_builtin_type (index
, objfile
);
273 /* Type is defined outside of header files.
274 Find it in this object file's type vector. */
275 if (index
>= type_vector_length
)
277 old_len
= type_vector_length
;
280 type_vector_length
= INITIAL_TYPE_VECTOR_LENGTH
;
281 type_vector
= XNEWVEC (struct type
*, type_vector_length
);
283 while (index
>= type_vector_length
)
285 type_vector_length
*= 2;
287 type_vector
= (struct type
**)
288 xrealloc ((char *) type_vector
,
289 (type_vector_length
* sizeof (struct type
*)));
290 memset (&type_vector
[old_len
], 0,
291 (type_vector_length
- old_len
) * sizeof (struct type
*));
293 return (&type_vector
[index
]);
297 real_filenum
= this_object_header_files
[filenum
];
299 if (real_filenum
>= N_HEADER_FILES (objfile
))
301 static struct type
*temp_type
;
303 warning (_("GDB internal error: bad real_filenum"));
306 temp_type
= objfile_type (objfile
)->builtin_error
;
310 f
= HEADER_FILES (objfile
) + real_filenum
;
312 f_orig_length
= f
->length
;
313 if (index
>= f_orig_length
)
315 while (index
>= f
->length
)
319 f
->vector
= (struct type
**)
320 xrealloc ((char *) f
->vector
, f
->length
* sizeof (struct type
*));
321 memset (&f
->vector
[f_orig_length
], 0,
322 (f
->length
- f_orig_length
) * sizeof (struct type
*));
324 return (&f
->vector
[index
]);
328 /* Make sure there is a type allocated for type numbers TYPENUMS
329 and return the type object.
330 This can create an empty (zeroed) type object.
331 TYPENUMS may be (-1, -1) to return a new type object that is not
332 put into the type vector, and so may not be referred to by number. */
335 dbx_alloc_type (int typenums
[2], struct objfile
*objfile
)
337 struct type
**type_addr
;
339 if (typenums
[0] == -1)
341 return (alloc_type (objfile
));
344 type_addr
= dbx_lookup_type (typenums
, objfile
);
346 /* If we are referring to a type not known at all yet,
347 allocate an empty type for it.
348 We will fill it in later if we find out how. */
351 *type_addr
= alloc_type (objfile
);
357 /* Allocate a floating-point type of size BITS. */
360 dbx_init_float_type (struct objfile
*objfile
, int bits
)
362 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
363 const struct floatformat
**format
;
366 format
= gdbarch_floatformat_for_type (gdbarch
, NULL
, bits
);
368 type
= init_float_type (objfile
, bits
, NULL
, format
);
370 type
= init_type (objfile
, TYPE_CODE_ERROR
, bits
/ TARGET_CHAR_BIT
, NULL
);
375 /* for all the stabs in a given stab vector, build appropriate types
376 and fix their symbols in given symbol vector. */
379 patch_block_stabs (struct pending
*symbols
, struct pending_stabs
*stabs
,
380 struct objfile
*objfile
)
389 /* for all the stab entries, find their corresponding symbols and
390 patch their types! */
392 for (ii
= 0; ii
< stabs
->count
; ++ii
)
394 name
= stabs
->stab
[ii
];
395 pp
= (char *) strchr (name
, ':');
396 gdb_assert (pp
); /* Must find a ':' or game's over. */
400 pp
= (char *) strchr (pp
, ':');
402 sym
= find_symbol_in_list (symbols
, name
, pp
- name
);
405 /* FIXME-maybe: it would be nice if we noticed whether
406 the variable was defined *anywhere*, not just whether
407 it is defined in this compilation unit. But neither
408 xlc or GCC seem to need such a definition, and until
409 we do psymtabs (so that the minimal symbols from all
410 compilation units are available now), I'm not sure
411 how to get the information. */
413 /* On xcoff, if a global is defined and never referenced,
414 ld will remove it from the executable. There is then
415 a N_GSYM stab for it, but no regular (C_EXT) symbol. */
416 sym
= allocate_symbol (objfile
);
417 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
418 SYMBOL_ACLASS_INDEX (sym
) = LOC_OPTIMIZED_OUT
;
419 SYMBOL_SET_LINKAGE_NAME
420 (sym
, (char *) obstack_copy0 (&objfile
->objfile_obstack
,
423 if (*(pp
- 1) == 'F' || *(pp
- 1) == 'f')
425 /* I don't think the linker does this with functions,
426 so as far as I know this is never executed.
427 But it doesn't hurt to check. */
429 lookup_function_type (read_type (&pp
, objfile
));
433 SYMBOL_TYPE (sym
) = read_type (&pp
, objfile
);
435 add_symbol_to_list (sym
, &global_symbols
);
440 if (*(pp
- 1) == 'F' || *(pp
- 1) == 'f')
443 lookup_function_type (read_type (&pp
, objfile
));
447 SYMBOL_TYPE (sym
) = read_type (&pp
, objfile
);
455 /* Read a number by which a type is referred to in dbx data,
456 or perhaps read a pair (FILENUM, TYPENUM) in parentheses.
457 Just a single number N is equivalent to (0,N).
458 Return the two numbers by storing them in the vector TYPENUMS.
459 TYPENUMS will then be used as an argument to dbx_lookup_type.
461 Returns 0 for success, -1 for error. */
464 read_type_number (char **pp
, int *typenums
)
471 typenums
[0] = read_huge_number (pp
, ',', &nbits
, 0);
474 typenums
[1] = read_huge_number (pp
, ')', &nbits
, 0);
481 typenums
[1] = read_huge_number (pp
, 0, &nbits
, 0);
489 #define VISIBILITY_PRIVATE '0' /* Stabs character for private field */
490 #define VISIBILITY_PROTECTED '1' /* Stabs character for protected fld */
491 #define VISIBILITY_PUBLIC '2' /* Stabs character for public field */
492 #define VISIBILITY_IGNORE '9' /* Optimized out or zero length */
494 /* Structure for storing pointers to reference definitions for fast lookup
495 during "process_later". */
504 #define MAX_CHUNK_REFS 100
505 #define REF_CHUNK_SIZE (MAX_CHUNK_REFS * sizeof (struct ref_map))
506 #define REF_MAP_SIZE(ref_chunk) ((ref_chunk) * REF_CHUNK_SIZE)
508 static struct ref_map
*ref_map
;
510 /* Ptr to free cell in chunk's linked list. */
511 static int ref_count
= 0;
513 /* Number of chunks malloced. */
514 static int ref_chunk
= 0;
516 /* This file maintains a cache of stabs aliases found in the symbol
517 table. If the symbol table changes, this cache must be cleared
518 or we are left holding onto data in invalid obstacks. */
520 stabsread_clear_cache (void)
526 /* Create array of pointers mapping refids to symbols and stab strings.
527 Add pointers to reference definition symbols and/or their values as we
528 find them, using their reference numbers as our index.
529 These will be used later when we resolve references. */
531 ref_add (int refnum
, struct symbol
*sym
, char *stabs
, CORE_ADDR value
)
535 if (refnum
>= ref_count
)
536 ref_count
= refnum
+ 1;
537 if (ref_count
> ref_chunk
* MAX_CHUNK_REFS
)
539 int new_slots
= ref_count
- ref_chunk
* MAX_CHUNK_REFS
;
540 int new_chunks
= new_slots
/ MAX_CHUNK_REFS
+ 1;
542 ref_map
= (struct ref_map
*)
543 xrealloc (ref_map
, REF_MAP_SIZE (ref_chunk
+ new_chunks
));
544 memset (ref_map
+ ref_chunk
* MAX_CHUNK_REFS
, 0,
545 new_chunks
* REF_CHUNK_SIZE
);
546 ref_chunk
+= new_chunks
;
548 ref_map
[refnum
].stabs
= stabs
;
549 ref_map
[refnum
].sym
= sym
;
550 ref_map
[refnum
].value
= value
;
553 /* Return defined sym for the reference REFNUM. */
555 ref_search (int refnum
)
557 if (refnum
< 0 || refnum
> ref_count
)
559 return ref_map
[refnum
].sym
;
562 /* Parse a reference id in STRING and return the resulting
563 reference number. Move STRING beyond the reference id. */
566 process_reference (char **string
)
574 /* Advance beyond the initial '#'. */
577 /* Read number as reference id. */
578 while (*p
&& isdigit (*p
))
580 refnum
= refnum
* 10 + *p
- '0';
587 /* If STRING defines a reference, store away a pointer to the reference
588 definition for later use. Return the reference number. */
591 symbol_reference_defined (char **string
)
596 refnum
= process_reference (&p
);
598 /* Defining symbols end in '='. */
601 /* Symbol is being defined here. */
607 /* Must be a reference. Either the symbol has already been defined,
608 or this is a forward reference to it. */
615 stab_reg_to_regnum (struct symbol
*sym
, struct gdbarch
*gdbarch
)
617 int regno
= gdbarch_stab_reg_to_regnum (gdbarch
, SYMBOL_VALUE (sym
));
620 || regno
>= (gdbarch_num_regs (gdbarch
)
621 + gdbarch_num_pseudo_regs (gdbarch
)))
623 reg_value_complaint (regno
,
624 gdbarch_num_regs (gdbarch
)
625 + gdbarch_num_pseudo_regs (gdbarch
),
626 SYMBOL_PRINT_NAME (sym
));
628 regno
= gdbarch_sp_regnum (gdbarch
); /* Known safe, though useless. */
634 static const struct symbol_register_ops stab_register_funcs
= {
638 /* The "aclass" indices for computed symbols. */
640 static int stab_register_index
;
641 static int stab_regparm_index
;
644 define_symbol (CORE_ADDR valu
, char *string
, int desc
, int type
,
645 struct objfile
*objfile
)
647 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
649 char *p
= (char *) find_name_end (string
);
654 /* We would like to eliminate nameless symbols, but keep their types.
655 E.g. stab entry ":t10=*2" should produce a type 10, which is a pointer
656 to type 2, but, should not create a symbol to address that type. Since
657 the symbol will be nameless, there is no way any user can refer to it. */
661 /* Ignore syms with empty names. */
665 /* Ignore old-style symbols from cc -go. */
675 complaint (&symfile_complaints
,
676 _("Bad stabs string '%s'"), string
);
681 /* If a nameless stab entry, all we need is the type, not the symbol.
682 e.g. ":t10=*2" or a nameless enum like " :T16=ered:0,green:1,blue:2,;" */
683 nameless
= (p
== string
|| ((string
[0] == ' ') && (string
[1] == ':')));
685 current_symbol
= sym
= allocate_symbol (objfile
);
687 if (processing_gcc_compilation
)
689 /* GCC 2.x puts the line number in desc. SunOS apparently puts in the
690 number of bytes occupied by a type or object, which we ignore. */
691 SYMBOL_LINE (sym
) = desc
;
695 SYMBOL_LINE (sym
) = 0; /* unknown */
698 SYMBOL_SET_LANGUAGE (sym
, current_subfile
->language
,
699 &objfile
->objfile_obstack
);
701 if (is_cplus_marker (string
[0]))
703 /* Special GNU C++ names. */
707 SYMBOL_SET_LINKAGE_NAME (sym
, "this");
710 case 'v': /* $vtbl_ptr_type */
714 SYMBOL_SET_LINKAGE_NAME (sym
, "eh_throw");
718 /* This was an anonymous type that was never fixed up. */
722 /* SunPRO (3.0 at least) static variable encoding. */
723 if (gdbarch_static_transform_name_p (gdbarch
))
725 /* ... fall through ... */
728 complaint (&symfile_complaints
, _("Unknown C++ symbol name `%s'"),
730 goto normal
; /* Do *something* with it. */
736 std::string new_name
;
738 if (SYMBOL_LANGUAGE (sym
) == language_cplus
)
740 char *name
= (char *) alloca (p
- string
+ 1);
742 memcpy (name
, string
, p
- string
);
743 name
[p
- string
] = '\0';
744 new_name
= cp_canonicalize_string (name
);
746 if (!new_name
.empty ())
748 SYMBOL_SET_NAMES (sym
,
749 new_name
.c_str (), new_name
.length (),
753 SYMBOL_SET_NAMES (sym
, string
, p
- string
, 1, objfile
);
755 if (SYMBOL_LANGUAGE (sym
) == language_cplus
)
756 cp_scan_for_anonymous_namespaces (sym
, objfile
);
761 /* Determine the type of name being defined. */
763 /* Getting GDB to correctly skip the symbol on an undefined symbol
764 descriptor and not ever dump core is a very dodgy proposition if
765 we do things this way. I say the acorn RISC machine can just
766 fix their compiler. */
767 /* The Acorn RISC machine's compiler can put out locals that don't
768 start with "234=" or "(3,4)=", so assume anything other than the
769 deftypes we know how to handle is a local. */
770 if (!strchr ("cfFGpPrStTvVXCR", *p
))
772 if (isdigit (*p
) || *p
== '(' || *p
== '-')
781 /* c is a special case, not followed by a type-number.
782 SYMBOL:c=iVALUE for an integer constant symbol.
783 SYMBOL:c=rVALUE for a floating constant symbol.
784 SYMBOL:c=eTYPE,INTVALUE for an enum constant symbol.
785 e.g. "b:c=e6,0" for "const b = blob1"
786 (where type 6 is defined by "blobs:t6=eblob1:0,blob2:1,;"). */
789 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST
;
790 SYMBOL_TYPE (sym
) = error_type (&p
, objfile
);
791 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
792 add_symbol_to_list (sym
, &file_symbols
);
802 struct type
*dbl_type
;
804 /* FIXME-if-picky-about-floating-accuracy: Should be using
805 target arithmetic to get the value. real.c in GCC
806 probably has the necessary code. */
808 dbl_type
= objfile_type (objfile
)->builtin_double
;
810 = (gdb_byte
*) obstack_alloc (&objfile
->objfile_obstack
,
811 TYPE_LENGTH (dbl_type
));
812 store_typed_floating (dbl_valu
, dbl_type
, d
);
814 SYMBOL_TYPE (sym
) = dbl_type
;
815 SYMBOL_VALUE_BYTES (sym
) = dbl_valu
;
816 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST_BYTES
;
821 /* Defining integer constants this way is kind of silly,
822 since 'e' constants allows the compiler to give not
823 only the value, but the type as well. C has at least
824 int, long, unsigned int, and long long as constant
825 types; other languages probably should have at least
826 unsigned as well as signed constants. */
828 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->builtin_long
;
829 SYMBOL_VALUE (sym
) = atoi (p
);
830 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST
;
836 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->builtin_char
;
837 SYMBOL_VALUE (sym
) = atoi (p
);
838 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST
;
844 struct type
*range_type
;
847 gdb_byte
*string_local
= (gdb_byte
*) alloca (strlen (p
));
848 gdb_byte
*string_value
;
850 if (quote
!= '\'' && quote
!= '"')
852 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST
;
853 SYMBOL_TYPE (sym
) = error_type (&p
, objfile
);
854 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
855 add_symbol_to_list (sym
, &file_symbols
);
859 /* Find matching quote, rejecting escaped quotes. */
860 while (*p
&& *p
!= quote
)
862 if (*p
== '\\' && p
[1] == quote
)
864 string_local
[ind
] = (gdb_byte
) quote
;
870 string_local
[ind
] = (gdb_byte
) (*p
);
877 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST
;
878 SYMBOL_TYPE (sym
) = error_type (&p
, objfile
);
879 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
880 add_symbol_to_list (sym
, &file_symbols
);
884 /* NULL terminate the string. */
885 string_local
[ind
] = 0;
887 = create_static_range_type (NULL
,
888 objfile_type (objfile
)->builtin_int
,
890 SYMBOL_TYPE (sym
) = create_array_type (NULL
,
891 objfile_type (objfile
)->builtin_char
,
894 = (gdb_byte
*) obstack_alloc (&objfile
->objfile_obstack
, ind
+ 1);
895 memcpy (string_value
, string_local
, ind
+ 1);
898 SYMBOL_VALUE_BYTES (sym
) = string_value
;
899 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST_BYTES
;
904 /* SYMBOL:c=eTYPE,INTVALUE for a constant symbol whose value
905 can be represented as integral.
906 e.g. "b:c=e6,0" for "const b = blob1"
907 (where type 6 is defined by "blobs:t6=eblob1:0,blob2:1,;"). */
909 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST
;
910 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
914 SYMBOL_TYPE (sym
) = error_type (&p
, objfile
);
919 /* If the value is too big to fit in an int (perhaps because
920 it is unsigned), or something like that, we silently get
921 a bogus value. The type and everything else about it is
922 correct. Ideally, we should be using whatever we have
923 available for parsing unsigned and long long values,
925 SYMBOL_VALUE (sym
) = atoi (p
);
930 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST
;
931 SYMBOL_TYPE (sym
) = error_type (&p
, objfile
);
934 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
935 add_symbol_to_list (sym
, &file_symbols
);
939 /* The name of a caught exception. */
940 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
941 SYMBOL_ACLASS_INDEX (sym
) = LOC_LABEL
;
942 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
943 SYMBOL_VALUE_ADDRESS (sym
) = valu
;
944 add_symbol_to_list (sym
, &local_symbols
);
948 /* A static function definition. */
949 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
950 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
951 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
952 add_symbol_to_list (sym
, &file_symbols
);
953 /* fall into process_function_types. */
955 process_function_types
:
956 /* Function result types are described as the result type in stabs.
957 We need to convert this to the function-returning-type-X type
958 in GDB. E.g. "int" is converted to "function returning int". */
959 if (TYPE_CODE (SYMBOL_TYPE (sym
)) != TYPE_CODE_FUNC
)
960 SYMBOL_TYPE (sym
) = lookup_function_type (SYMBOL_TYPE (sym
));
962 /* All functions in C++ have prototypes. Stabs does not offer an
963 explicit way to identify prototyped or unprototyped functions,
964 but both GCC and Sun CC emit stabs for the "call-as" type rather
965 than the "declared-as" type for unprototyped functions, so
966 we treat all functions as if they were prototyped. This is used
967 primarily for promotion when calling the function from GDB. */
968 TYPE_PROTOTYPED (SYMBOL_TYPE (sym
)) = 1;
970 /* fall into process_prototype_types. */
972 process_prototype_types
:
973 /* Sun acc puts declared types of arguments here. */
976 struct type
*ftype
= SYMBOL_TYPE (sym
);
981 /* Obtain a worst case guess for the number of arguments
982 by counting the semicolons. */
989 /* Allocate parameter information fields and fill them in. */
990 TYPE_FIELDS (ftype
) = (struct field
*)
991 TYPE_ALLOC (ftype
, nsemi
* sizeof (struct field
));
996 /* A type number of zero indicates the start of varargs.
997 FIXME: GDB currently ignores vararg functions. */
998 if (p
[0] == '0' && p
[1] == '\0')
1000 ptype
= read_type (&p
, objfile
);
1002 /* The Sun compilers mark integer arguments, which should
1003 be promoted to the width of the calling conventions, with
1004 a type which references itself. This type is turned into
1005 a TYPE_CODE_VOID type by read_type, and we have to turn
1006 it back into builtin_int here.
1007 FIXME: Do we need a new builtin_promoted_int_arg ? */
1008 if (TYPE_CODE (ptype
) == TYPE_CODE_VOID
)
1009 ptype
= objfile_type (objfile
)->builtin_int
;
1010 TYPE_FIELD_TYPE (ftype
, nparams
) = ptype
;
1011 TYPE_FIELD_ARTIFICIAL (ftype
, nparams
++) = 0;
1013 TYPE_NFIELDS (ftype
) = nparams
;
1014 TYPE_PROTOTYPED (ftype
) = 1;
1019 /* A global function definition. */
1020 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
1021 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
1022 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1023 add_symbol_to_list (sym
, &global_symbols
);
1024 goto process_function_types
;
1027 /* For a class G (global) symbol, it appears that the
1028 value is not correct. It is necessary to search for the
1029 corresponding linker definition to find the value.
1030 These definitions appear at the end of the namelist. */
1031 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
1032 SYMBOL_ACLASS_INDEX (sym
) = LOC_STATIC
;
1033 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1034 /* Don't add symbol references to global_sym_chain.
1035 Symbol references don't have valid names and wont't match up with
1036 minimal symbols when the global_sym_chain is relocated.
1037 We'll fixup symbol references when we fixup the defining symbol. */
1038 if (SYMBOL_LINKAGE_NAME (sym
) && SYMBOL_LINKAGE_NAME (sym
)[0] != '#')
1040 i
= hashname (SYMBOL_LINKAGE_NAME (sym
));
1041 SYMBOL_VALUE_CHAIN (sym
) = global_sym_chain
[i
];
1042 global_sym_chain
[i
] = sym
;
1044 add_symbol_to_list (sym
, &global_symbols
);
1047 /* This case is faked by a conditional above,
1048 when there is no code letter in the dbx data.
1049 Dbx data never actually contains 'l'. */
1052 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
1053 SYMBOL_ACLASS_INDEX (sym
) = LOC_LOCAL
;
1054 SYMBOL_VALUE (sym
) = valu
;
1055 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1056 add_symbol_to_list (sym
, &local_symbols
);
1061 /* pF is a two-letter code that means a function parameter in Fortran.
1062 The type-number specifies the type of the return value.
1063 Translate it into a pointer-to-function type. */
1067 = lookup_pointer_type
1068 (lookup_function_type (read_type (&p
, objfile
)));
1071 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
1073 SYMBOL_ACLASS_INDEX (sym
) = LOC_ARG
;
1074 SYMBOL_VALUE (sym
) = valu
;
1075 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1076 SYMBOL_IS_ARGUMENT (sym
) = 1;
1077 add_symbol_to_list (sym
, &local_symbols
);
1079 if (gdbarch_byte_order (gdbarch
) != BFD_ENDIAN_BIG
)
1081 /* On little-endian machines, this crud is never necessary,
1082 and, if the extra bytes contain garbage, is harmful. */
1086 /* If it's gcc-compiled, if it says `short', believe it. */
1087 if (processing_gcc_compilation
1088 || gdbarch_believe_pcc_promotion (gdbarch
))
1091 if (!gdbarch_believe_pcc_promotion (gdbarch
))
1093 /* If PCC says a parameter is a short or a char, it is
1095 if (TYPE_LENGTH (SYMBOL_TYPE (sym
))
1096 < gdbarch_int_bit (gdbarch
) / TARGET_CHAR_BIT
1097 && TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_INT
)
1100 TYPE_UNSIGNED (SYMBOL_TYPE (sym
))
1101 ? objfile_type (objfile
)->builtin_unsigned_int
1102 : objfile_type (objfile
)->builtin_int
;
1108 /* acc seems to use P to declare the prototypes of functions that
1109 are referenced by this file. gdb is not prepared to deal
1110 with this extra information. FIXME, it ought to. */
1113 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
1114 goto process_prototype_types
;
1119 /* Parameter which is in a register. */
1120 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
1121 SYMBOL_ACLASS_INDEX (sym
) = stab_register_index
;
1122 SYMBOL_IS_ARGUMENT (sym
) = 1;
1123 SYMBOL_VALUE (sym
) = valu
;
1124 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1125 add_symbol_to_list (sym
, &local_symbols
);
1129 /* Register variable (either global or local). */
1130 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
1131 SYMBOL_ACLASS_INDEX (sym
) = stab_register_index
;
1132 SYMBOL_VALUE (sym
) = valu
;
1133 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1134 if (within_function
)
1136 /* Sun cc uses a pair of symbols, one 'p' and one 'r', with
1137 the same name to represent an argument passed in a
1138 register. GCC uses 'P' for the same case. So if we find
1139 such a symbol pair we combine it into one 'P' symbol.
1140 For Sun cc we need to do this regardless of
1141 stabs_argument_has_addr, because the compiler puts out
1142 the 'p' symbol even if it never saves the argument onto
1145 On most machines, we want to preserve both symbols, so
1146 that we can still get information about what is going on
1147 with the stack (VAX for computing args_printed, using
1148 stack slots instead of saved registers in backtraces,
1151 Note that this code illegally combines
1152 main(argc) struct foo argc; { register struct foo argc; }
1153 but this case is considered pathological and causes a warning
1154 from a decent compiler. */
1157 && local_symbols
->nsyms
> 0
1158 && gdbarch_stabs_argument_has_addr (gdbarch
, SYMBOL_TYPE (sym
)))
1160 struct symbol
*prev_sym
;
1162 prev_sym
= local_symbols
->symbol
[local_symbols
->nsyms
- 1];
1163 if ((SYMBOL_CLASS (prev_sym
) == LOC_REF_ARG
1164 || SYMBOL_CLASS (prev_sym
) == LOC_ARG
)
1165 && strcmp (SYMBOL_LINKAGE_NAME (prev_sym
),
1166 SYMBOL_LINKAGE_NAME (sym
)) == 0)
1168 SYMBOL_ACLASS_INDEX (prev_sym
) = stab_register_index
;
1169 /* Use the type from the LOC_REGISTER; that is the type
1170 that is actually in that register. */
1171 SYMBOL_TYPE (prev_sym
) = SYMBOL_TYPE (sym
);
1172 SYMBOL_VALUE (prev_sym
) = SYMBOL_VALUE (sym
);
1177 add_symbol_to_list (sym
, &local_symbols
);
1180 add_symbol_to_list (sym
, &file_symbols
);
1184 /* Static symbol at top level of file. */
1185 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
1186 SYMBOL_ACLASS_INDEX (sym
) = LOC_STATIC
;
1187 SYMBOL_VALUE_ADDRESS (sym
) = valu
;
1188 if (gdbarch_static_transform_name_p (gdbarch
)
1189 && gdbarch_static_transform_name (gdbarch
,
1190 SYMBOL_LINKAGE_NAME (sym
))
1191 != SYMBOL_LINKAGE_NAME (sym
))
1193 struct bound_minimal_symbol msym
;
1195 msym
= lookup_minimal_symbol (SYMBOL_LINKAGE_NAME (sym
),
1197 if (msym
.minsym
!= NULL
)
1199 const char *new_name
= gdbarch_static_transform_name
1200 (gdbarch
, SYMBOL_LINKAGE_NAME (sym
));
1202 SYMBOL_SET_LINKAGE_NAME (sym
, new_name
);
1203 SYMBOL_VALUE_ADDRESS (sym
) = BMSYMBOL_VALUE_ADDRESS (msym
);
1206 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1207 add_symbol_to_list (sym
, &file_symbols
);
1211 /* In Ada, there is no distinction between typedef and non-typedef;
1212 any type declaration implicitly has the equivalent of a typedef,
1213 and thus 't' is in fact equivalent to 'Tt'.
1215 Therefore, for Ada units, we check the character immediately
1216 before the 't', and if we do not find a 'T', then make sure to
1217 create the associated symbol in the STRUCT_DOMAIN ('t' definitions
1218 will be stored in the VAR_DOMAIN). If the symbol was indeed
1219 defined as 'Tt' then the STRUCT_DOMAIN symbol will be created
1220 elsewhere, so we don't need to take care of that.
1222 This is important to do, because of forward references:
1223 The cleanup of undefined types stored in undef_types only uses
1224 STRUCT_DOMAIN symbols to perform the replacement. */
1225 synonym
= (SYMBOL_LANGUAGE (sym
) == language_ada
&& p
[-2] != '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_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
1236 SYMBOL_VALUE (sym
) = valu
;
1237 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1238 /* C++ vagaries: we may have a type which is derived from
1239 a base type which did not have its name defined when the
1240 derived class was output. We fill in the derived class's
1241 base part member's name here in that case. */
1242 if (TYPE_NAME (SYMBOL_TYPE (sym
)) != NULL
)
1243 if ((TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_STRUCT
1244 || TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_UNION
)
1245 && TYPE_N_BASECLASSES (SYMBOL_TYPE (sym
)))
1249 for (j
= TYPE_N_BASECLASSES (SYMBOL_TYPE (sym
)) - 1; j
>= 0; j
--)
1250 if (TYPE_BASECLASS_NAME (SYMBOL_TYPE (sym
), j
) == 0)
1251 TYPE_BASECLASS_NAME (SYMBOL_TYPE (sym
), j
) =
1252 type_name_no_tag (TYPE_BASECLASS (SYMBOL_TYPE (sym
), j
));
1255 if (TYPE_NAME (SYMBOL_TYPE (sym
)) == NULL
)
1257 /* gcc-2.6 or later (when using -fvtable-thunks)
1258 emits a unique named type for a vtable entry.
1259 Some gdb code depends on that specific name. */
1260 extern const char vtbl_ptr_name
[];
1262 if ((TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_PTR
1263 && strcmp (SYMBOL_LINKAGE_NAME (sym
), vtbl_ptr_name
))
1264 || TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_FUNC
)
1266 /* If we are giving a name to a type such as "pointer to
1267 foo" or "function returning foo", we better not set
1268 the TYPE_NAME. If the program contains "typedef char
1269 *caddr_t;", we don't want all variables of type char
1270 * to print as caddr_t. This is not just a
1271 consequence of GDB's type management; PCC and GCC (at
1272 least through version 2.4) both output variables of
1273 either type char * or caddr_t with the type number
1274 defined in the 't' symbol for caddr_t. If a future
1275 compiler cleans this up it GDB is not ready for it
1276 yet, but if it becomes ready we somehow need to
1277 disable this check (without breaking the PCC/GCC2.4
1282 Fortunately, this check seems not to be necessary
1283 for anything except pointers or functions. */
1284 /* ezannoni: 2000-10-26. This seems to apply for
1285 versions of gcc older than 2.8. This was the original
1286 problem: with the following code gdb would tell that
1287 the type for name1 is caddr_t, and func is char().
1289 typedef char *caddr_t;
1301 /* Pascal accepts names for pointer types. */
1302 if (current_subfile
->language
== language_pascal
)
1304 TYPE_NAME (SYMBOL_TYPE (sym
)) = SYMBOL_LINKAGE_NAME (sym
);
1308 TYPE_NAME (SYMBOL_TYPE (sym
)) = SYMBOL_LINKAGE_NAME (sym
);
1311 add_symbol_to_list (sym
, &file_symbols
);
1315 /* Create the STRUCT_DOMAIN clone. */
1316 struct symbol
*struct_sym
= allocate_symbol (objfile
);
1319 SYMBOL_ACLASS_INDEX (struct_sym
) = LOC_TYPEDEF
;
1320 SYMBOL_VALUE (struct_sym
) = valu
;
1321 SYMBOL_DOMAIN (struct_sym
) = STRUCT_DOMAIN
;
1322 if (TYPE_NAME (SYMBOL_TYPE (sym
)) == 0)
1323 TYPE_NAME (SYMBOL_TYPE (sym
))
1324 = obconcat (&objfile
->objfile_obstack
,
1325 SYMBOL_LINKAGE_NAME (sym
),
1327 add_symbol_to_list (struct_sym
, &file_symbols
);
1333 /* Struct, union, or enum tag. For GNU C++, this can be be followed
1334 by 't' which means we are typedef'ing it as well. */
1335 synonym
= *p
== 't';
1340 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
1342 /* For a nameless type, we don't want a create a symbol, thus we
1343 did not use `sym'. Return without further processing. */
1347 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
1348 SYMBOL_VALUE (sym
) = valu
;
1349 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
1350 if (TYPE_TAG_NAME (SYMBOL_TYPE (sym
)) == 0)
1351 TYPE_TAG_NAME (SYMBOL_TYPE (sym
))
1352 = obconcat (&objfile
->objfile_obstack
,
1353 SYMBOL_LINKAGE_NAME (sym
),
1355 add_symbol_to_list (sym
, &file_symbols
);
1359 /* Clone the sym and then modify it. */
1360 struct symbol
*typedef_sym
= allocate_symbol (objfile
);
1362 *typedef_sym
= *sym
;
1363 SYMBOL_ACLASS_INDEX (typedef_sym
) = LOC_TYPEDEF
;
1364 SYMBOL_VALUE (typedef_sym
) = valu
;
1365 SYMBOL_DOMAIN (typedef_sym
) = VAR_DOMAIN
;
1366 if (TYPE_NAME (SYMBOL_TYPE (sym
)) == 0)
1367 TYPE_NAME (SYMBOL_TYPE (sym
))
1368 = obconcat (&objfile
->objfile_obstack
,
1369 SYMBOL_LINKAGE_NAME (sym
),
1371 add_symbol_to_list (typedef_sym
, &file_symbols
);
1376 /* Static symbol of local scope. */
1377 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
1378 SYMBOL_ACLASS_INDEX (sym
) = LOC_STATIC
;
1379 SYMBOL_VALUE_ADDRESS (sym
) = valu
;
1380 if (gdbarch_static_transform_name_p (gdbarch
)
1381 && gdbarch_static_transform_name (gdbarch
,
1382 SYMBOL_LINKAGE_NAME (sym
))
1383 != SYMBOL_LINKAGE_NAME (sym
))
1385 struct bound_minimal_symbol msym
;
1387 msym
= lookup_minimal_symbol (SYMBOL_LINKAGE_NAME (sym
),
1389 if (msym
.minsym
!= NULL
)
1391 const char *new_name
= gdbarch_static_transform_name
1392 (gdbarch
, SYMBOL_LINKAGE_NAME (sym
));
1394 SYMBOL_SET_LINKAGE_NAME (sym
, new_name
);
1395 SYMBOL_VALUE_ADDRESS (sym
) = BMSYMBOL_VALUE_ADDRESS (msym
);
1398 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1399 add_symbol_to_list (sym
, &local_symbols
);
1403 /* Reference parameter */
1404 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
1405 SYMBOL_ACLASS_INDEX (sym
) = LOC_REF_ARG
;
1406 SYMBOL_IS_ARGUMENT (sym
) = 1;
1407 SYMBOL_VALUE (sym
) = valu
;
1408 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1409 add_symbol_to_list (sym
, &local_symbols
);
1413 /* Reference parameter which is in a register. */
1414 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
1415 SYMBOL_ACLASS_INDEX (sym
) = stab_regparm_index
;
1416 SYMBOL_IS_ARGUMENT (sym
) = 1;
1417 SYMBOL_VALUE (sym
) = valu
;
1418 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1419 add_symbol_to_list (sym
, &local_symbols
);
1423 /* This is used by Sun FORTRAN for "function result value".
1424 Sun claims ("dbx and dbxtool interfaces", 2nd ed)
1425 that Pascal uses it too, but when I tried it Pascal used
1426 "x:3" (local symbol) instead. */
1427 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
1428 SYMBOL_ACLASS_INDEX (sym
) = LOC_LOCAL
;
1429 SYMBOL_VALUE (sym
) = valu
;
1430 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1431 add_symbol_to_list (sym
, &local_symbols
);
1435 SYMBOL_TYPE (sym
) = error_type (&p
, objfile
);
1436 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST
;
1437 SYMBOL_VALUE (sym
) = 0;
1438 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1439 add_symbol_to_list (sym
, &file_symbols
);
1443 /* Some systems pass variables of certain types by reference instead
1444 of by value, i.e. they will pass the address of a structure (in a
1445 register or on the stack) instead of the structure itself. */
1447 if (gdbarch_stabs_argument_has_addr (gdbarch
, SYMBOL_TYPE (sym
))
1448 && SYMBOL_IS_ARGUMENT (sym
))
1450 /* We have to convert LOC_REGISTER to LOC_REGPARM_ADDR (for
1451 variables passed in a register). */
1452 if (SYMBOL_CLASS (sym
) == LOC_REGISTER
)
1453 SYMBOL_ACLASS_INDEX (sym
) = LOC_REGPARM_ADDR
;
1454 /* Likewise for converting LOC_ARG to LOC_REF_ARG (for the 7th
1455 and subsequent arguments on SPARC, for example). */
1456 else if (SYMBOL_CLASS (sym
) == LOC_ARG
)
1457 SYMBOL_ACLASS_INDEX (sym
) = LOC_REF_ARG
;
1463 /* Skip rest of this symbol and return an error type.
1465 General notes on error recovery: error_type always skips to the
1466 end of the symbol (modulo cretinous dbx symbol name continuation).
1467 Thus code like this:
1469 if (*(*pp)++ != ';')
1470 return error_type (pp, objfile);
1472 is wrong because if *pp starts out pointing at '\0' (typically as the
1473 result of an earlier error), it will be incremented to point to the
1474 start of the next symbol, which might produce strange results, at least
1475 if you run off the end of the string table. Instead use
1478 return error_type (pp, objfile);
1484 foo = error_type (pp, objfile);
1488 And in case it isn't obvious, the point of all this hair is so the compiler
1489 can define new types and new syntaxes, and old versions of the
1490 debugger will be able to read the new symbol tables. */
1492 static struct type
*
1493 error_type (char **pp
, struct objfile
*objfile
)
1495 complaint (&symfile_complaints
,
1496 _("couldn't parse type; debugger out of date?"));
1499 /* Skip to end of symbol. */
1500 while (**pp
!= '\0')
1505 /* Check for and handle cretinous dbx symbol name continuation! */
1506 if ((*pp
)[-1] == '\\' || (*pp
)[-1] == '?')
1508 *pp
= next_symbol_text (objfile
);
1515 return objfile_type (objfile
)->builtin_error
;
1519 /* Read type information or a type definition; return the type. Even
1520 though this routine accepts either type information or a type
1521 definition, the distinction is relevant--some parts of stabsread.c
1522 assume that type information starts with a digit, '-', or '(' in
1523 deciding whether to call read_type. */
1525 static struct type
*
1526 read_type (char **pp
, struct objfile
*objfile
)
1528 struct type
*type
= 0;
1531 char type_descriptor
;
1533 /* Size in bits of type if specified by a type attribute, or -1 if
1534 there is no size attribute. */
1537 /* Used to distinguish string and bitstring from char-array and set. */
1540 /* Used to distinguish vector from array. */
1543 /* Read type number if present. The type number may be omitted.
1544 for instance in a two-dimensional array declared with type
1545 "ar1;1;10;ar1;1;10;4". */
1546 if ((**pp
>= '0' && **pp
<= '9')
1550 if (read_type_number (pp
, typenums
) != 0)
1551 return error_type (pp
, objfile
);
1555 /* Type is not being defined here. Either it already
1556 exists, or this is a forward reference to it.
1557 dbx_alloc_type handles both cases. */
1558 type
= dbx_alloc_type (typenums
, objfile
);
1560 /* If this is a forward reference, arrange to complain if it
1561 doesn't get patched up by the time we're done
1563 if (TYPE_CODE (type
) == TYPE_CODE_UNDEF
)
1564 add_undefined_type (type
, typenums
);
1569 /* Type is being defined here. */
1571 Also skip the type descriptor - we get it below with (*pp)[-1]. */
1576 /* 'typenums=' not present, type is anonymous. Read and return
1577 the definition, but don't put it in the type vector. */
1578 typenums
[0] = typenums
[1] = -1;
1583 type_descriptor
= (*pp
)[-1];
1584 switch (type_descriptor
)
1588 enum type_code code
;
1590 /* Used to index through file_symbols. */
1591 struct pending
*ppt
;
1594 /* Name including "struct", etc. */
1598 char *from
, *to
, *p
, *q1
, *q2
;
1600 /* Set the type code according to the following letter. */
1604 code
= TYPE_CODE_STRUCT
;
1607 code
= TYPE_CODE_UNION
;
1610 code
= TYPE_CODE_ENUM
;
1614 /* Complain and keep going, so compilers can invent new
1615 cross-reference types. */
1616 complaint (&symfile_complaints
,
1617 _("Unrecognized cross-reference type `%c'"),
1619 code
= TYPE_CODE_STRUCT
;
1624 q1
= strchr (*pp
, '<');
1625 p
= strchr (*pp
, ':');
1627 return error_type (pp
, objfile
);
1628 if (q1
&& p
> q1
&& p
[1] == ':')
1630 int nesting_level
= 0;
1632 for (q2
= q1
; *q2
; q2
++)
1636 else if (*q2
== '>')
1638 else if (*q2
== ':' && nesting_level
== 0)
1643 return error_type (pp
, objfile
);
1646 if (current_subfile
->language
== language_cplus
)
1648 char *name
= (char *) alloca (p
- *pp
+ 1);
1650 memcpy (name
, *pp
, p
- *pp
);
1651 name
[p
- *pp
] = '\0';
1653 std::string new_name
= cp_canonicalize_string (name
);
1654 if (!new_name
.empty ())
1657 = (char *) obstack_copy0 (&objfile
->objfile_obstack
,
1659 new_name
.length ());
1662 if (type_name
== NULL
)
1664 to
= type_name
= (char *)
1665 obstack_alloc (&objfile
->objfile_obstack
, p
- *pp
+ 1);
1667 /* Copy the name. */
1674 /* Set the pointer ahead of the name which we just read, and
1679 /* If this type has already been declared, then reuse the same
1680 type, rather than allocating a new one. This saves some
1683 for (ppt
= file_symbols
; ppt
; ppt
= ppt
->next
)
1684 for (i
= 0; i
< ppt
->nsyms
; i
++)
1686 struct symbol
*sym
= ppt
->symbol
[i
];
1688 if (SYMBOL_CLASS (sym
) == LOC_TYPEDEF
1689 && SYMBOL_DOMAIN (sym
) == STRUCT_DOMAIN
1690 && (TYPE_CODE (SYMBOL_TYPE (sym
)) == code
)
1691 && strcmp (SYMBOL_LINKAGE_NAME (sym
), type_name
) == 0)
1693 obstack_free (&objfile
->objfile_obstack
, type_name
);
1694 type
= SYMBOL_TYPE (sym
);
1695 if (typenums
[0] != -1)
1696 *dbx_lookup_type (typenums
, objfile
) = type
;
1701 /* Didn't find the type to which this refers, so we must
1702 be dealing with a forward reference. Allocate a type
1703 structure for it, and keep track of it so we can
1704 fill in the rest of the fields when we get the full
1706 type
= dbx_alloc_type (typenums
, objfile
);
1707 TYPE_CODE (type
) = code
;
1708 TYPE_TAG_NAME (type
) = type_name
;
1709 INIT_CPLUS_SPECIFIC (type
);
1710 TYPE_STUB (type
) = 1;
1712 add_undefined_type (type
, typenums
);
1716 case '-': /* RS/6000 built-in type */
1730 /* We deal with something like t(1,2)=(3,4)=... which
1731 the Lucid compiler and recent gcc versions (post 2.7.3) use. */
1733 /* Allocate and enter the typedef type first.
1734 This handles recursive types. */
1735 type
= dbx_alloc_type (typenums
, objfile
);
1736 TYPE_CODE (type
) = TYPE_CODE_TYPEDEF
;
1738 struct type
*xtype
= read_type (pp
, objfile
);
1742 /* It's being defined as itself. That means it is "void". */
1743 TYPE_CODE (type
) = TYPE_CODE_VOID
;
1744 TYPE_LENGTH (type
) = 1;
1746 else if (type_size
>= 0 || is_string
)
1748 /* This is the absolute wrong way to construct types. Every
1749 other debug format has found a way around this problem and
1750 the related problems with unnecessarily stubbed types;
1751 someone motivated should attempt to clean up the issue
1752 here as well. Once a type pointed to has been created it
1753 should not be modified.
1755 Well, it's not *absolutely* wrong. Constructing recursive
1756 types (trees, linked lists) necessarily entails modifying
1757 types after creating them. Constructing any loop structure
1758 entails side effects. The Dwarf 2 reader does handle this
1759 more gracefully (it never constructs more than once
1760 instance of a type object, so it doesn't have to copy type
1761 objects wholesale), but it still mutates type objects after
1762 other folks have references to them.
1764 Keep in mind that this circularity/mutation issue shows up
1765 at the source language level, too: C's "incomplete types",
1766 for example. So the proper cleanup, I think, would be to
1767 limit GDB's type smashing to match exactly those required
1768 by the source language. So GDB could have a
1769 "complete_this_type" function, but never create unnecessary
1770 copies of a type otherwise. */
1771 replace_type (type
, xtype
);
1772 TYPE_NAME (type
) = NULL
;
1773 TYPE_TAG_NAME (type
) = NULL
;
1777 TYPE_TARGET_STUB (type
) = 1;
1778 TYPE_TARGET_TYPE (type
) = xtype
;
1783 /* In the following types, we must be sure to overwrite any existing
1784 type that the typenums refer to, rather than allocating a new one
1785 and making the typenums point to the new one. This is because there
1786 may already be pointers to the existing type (if it had been
1787 forward-referenced), and we must change it to a pointer, function,
1788 reference, or whatever, *in-place*. */
1790 case '*': /* Pointer to another type */
1791 type1
= read_type (pp
, objfile
);
1792 type
= make_pointer_type (type1
, dbx_lookup_type (typenums
, objfile
));
1795 case '&': /* Reference to another type */
1796 type1
= read_type (pp
, objfile
);
1797 type
= make_reference_type (type1
, dbx_lookup_type (typenums
, objfile
));
1800 case 'f': /* Function returning another type */
1801 type1
= read_type (pp
, objfile
);
1802 type
= make_function_type (type1
, dbx_lookup_type (typenums
, objfile
));
1805 case 'g': /* Prototyped function. (Sun) */
1807 /* Unresolved questions:
1809 - According to Sun's ``STABS Interface Manual'', for 'f'
1810 and 'F' symbol descriptors, a `0' in the argument type list
1811 indicates a varargs function. But it doesn't say how 'g'
1812 type descriptors represent that info. Someone with access
1813 to Sun's toolchain should try it out.
1815 - According to the comment in define_symbol (search for
1816 `process_prototype_types:'), Sun emits integer arguments as
1817 types which ref themselves --- like `void' types. Do we
1818 have to deal with that here, too? Again, someone with
1819 access to Sun's toolchain should try it out and let us
1822 const char *type_start
= (*pp
) - 1;
1823 struct type
*return_type
= read_type (pp
, objfile
);
1824 struct type
*func_type
1825 = make_function_type (return_type
,
1826 dbx_lookup_type (typenums
, objfile
));
1829 struct type_list
*next
;
1833 while (**pp
&& **pp
!= '#')
1835 struct type
*arg_type
= read_type (pp
, objfile
);
1836 struct type_list
*newobj
= XALLOCA (struct type_list
);
1837 newobj
->type
= arg_type
;
1838 newobj
->next
= arg_types
;
1846 complaint (&symfile_complaints
,
1847 _("Prototyped function type didn't "
1848 "end arguments with `#':\n%s"),
1852 /* If there is just one argument whose type is `void', then
1853 that's just an empty argument list. */
1855 && ! arg_types
->next
1856 && TYPE_CODE (arg_types
->type
) == TYPE_CODE_VOID
)
1859 TYPE_FIELDS (func_type
)
1860 = (struct field
*) TYPE_ALLOC (func_type
,
1861 num_args
* sizeof (struct field
));
1862 memset (TYPE_FIELDS (func_type
), 0, num_args
* sizeof (struct field
));
1865 struct type_list
*t
;
1867 /* We stuck each argument type onto the front of the list
1868 when we read it, so the list is reversed. Build the
1869 fields array right-to-left. */
1870 for (t
= arg_types
, i
= num_args
- 1; t
; t
= t
->next
, i
--)
1871 TYPE_FIELD_TYPE (func_type
, i
) = t
->type
;
1873 TYPE_NFIELDS (func_type
) = num_args
;
1874 TYPE_PROTOTYPED (func_type
) = 1;
1880 case 'k': /* Const qualifier on some type (Sun) */
1881 type
= read_type (pp
, objfile
);
1882 type
= make_cv_type (1, TYPE_VOLATILE (type
), type
,
1883 dbx_lookup_type (typenums
, objfile
));
1886 case 'B': /* Volatile qual on some type (Sun) */
1887 type
= read_type (pp
, objfile
);
1888 type
= make_cv_type (TYPE_CONST (type
), 1, type
,
1889 dbx_lookup_type (typenums
, objfile
));
1893 if (isdigit (**pp
) || **pp
== '(' || **pp
== '-')
1894 { /* Member (class & variable) type */
1895 /* FIXME -- we should be doing smash_to_XXX types here. */
1897 struct type
*domain
= read_type (pp
, objfile
);
1898 struct type
*memtype
;
1901 /* Invalid member type data format. */
1902 return error_type (pp
, objfile
);
1905 memtype
= read_type (pp
, objfile
);
1906 type
= dbx_alloc_type (typenums
, objfile
);
1907 smash_to_memberptr_type (type
, domain
, memtype
);
1910 /* type attribute */
1914 /* Skip to the semicolon. */
1915 while (**pp
!= ';' && **pp
!= '\0')
1918 return error_type (pp
, objfile
);
1920 ++ * pp
; /* Skip the semicolon. */
1924 case 's': /* Size attribute */
1925 type_size
= atoi (attr
+ 1);
1930 case 'S': /* String attribute */
1931 /* FIXME: check to see if following type is array? */
1935 case 'V': /* Vector attribute */
1936 /* FIXME: check to see if following type is array? */
1941 /* Ignore unrecognized type attributes, so future compilers
1942 can invent new ones. */
1950 case '#': /* Method (class & fn) type */
1951 if ((*pp
)[0] == '#')
1953 /* We'll get the parameter types from the name. */
1954 struct type
*return_type
;
1957 return_type
= read_type (pp
, objfile
);
1958 if (*(*pp
)++ != ';')
1959 complaint (&symfile_complaints
,
1960 _("invalid (minimal) member type "
1961 "data format at symtab pos %d."),
1963 type
= allocate_stub_method (return_type
);
1964 if (typenums
[0] != -1)
1965 *dbx_lookup_type (typenums
, objfile
) = type
;
1969 struct type
*domain
= read_type (pp
, objfile
);
1970 struct type
*return_type
;
1975 /* Invalid member type data format. */
1976 return error_type (pp
, objfile
);
1980 return_type
= read_type (pp
, objfile
);
1981 args
= read_args (pp
, ';', objfile
, &nargs
, &varargs
);
1983 return error_type (pp
, objfile
);
1984 type
= dbx_alloc_type (typenums
, objfile
);
1985 smash_to_method_type (type
, domain
, return_type
, args
,
1990 case 'r': /* Range type */
1991 type
= read_range_type (pp
, typenums
, type_size
, objfile
);
1992 if (typenums
[0] != -1)
1993 *dbx_lookup_type (typenums
, objfile
) = type
;
1998 /* Sun ACC builtin int type */
1999 type
= read_sun_builtin_type (pp
, typenums
, objfile
);
2000 if (typenums
[0] != -1)
2001 *dbx_lookup_type (typenums
, objfile
) = type
;
2005 case 'R': /* Sun ACC builtin float type */
2006 type
= read_sun_floating_type (pp
, typenums
, objfile
);
2007 if (typenums
[0] != -1)
2008 *dbx_lookup_type (typenums
, objfile
) = type
;
2011 case 'e': /* Enumeration type */
2012 type
= dbx_alloc_type (typenums
, objfile
);
2013 type
= read_enum_type (pp
, type
, objfile
);
2014 if (typenums
[0] != -1)
2015 *dbx_lookup_type (typenums
, objfile
) = type
;
2018 case 's': /* Struct type */
2019 case 'u': /* Union type */
2021 enum type_code type_code
= TYPE_CODE_UNDEF
;
2022 type
= dbx_alloc_type (typenums
, objfile
);
2023 switch (type_descriptor
)
2026 type_code
= TYPE_CODE_STRUCT
;
2029 type_code
= TYPE_CODE_UNION
;
2032 type
= read_struct_type (pp
, type
, type_code
, objfile
);
2036 case 'a': /* Array type */
2038 return error_type (pp
, objfile
);
2041 type
= dbx_alloc_type (typenums
, objfile
);
2042 type
= read_array_type (pp
, type
, objfile
);
2044 TYPE_CODE (type
) = TYPE_CODE_STRING
;
2046 make_vector_type (type
);
2049 case 'S': /* Set type */
2050 type1
= read_type (pp
, objfile
);
2051 type
= create_set_type ((struct type
*) NULL
, type1
);
2052 if (typenums
[0] != -1)
2053 *dbx_lookup_type (typenums
, objfile
) = type
;
2057 --*pp
; /* Go back to the symbol in error. */
2058 /* Particularly important if it was \0! */
2059 return error_type (pp
, objfile
);
2064 warning (_("GDB internal error, type is NULL in stabsread.c."));
2065 return error_type (pp
, objfile
);
2068 /* Size specified in a type attribute overrides any other size. */
2069 if (type_size
!= -1)
2070 TYPE_LENGTH (type
) = (type_size
+ TARGET_CHAR_BIT
- 1) / TARGET_CHAR_BIT
;
2075 /* RS/6000 xlc/dbx combination uses a set of builtin types, starting from -1.
2076 Return the proper type node for a given builtin type number. */
2078 static const struct objfile_data
*rs6000_builtin_type_data
;
2080 static struct type
*
2081 rs6000_builtin_type (int typenum
, struct objfile
*objfile
)
2083 struct type
**negative_types
2084 = (struct type
**) objfile_data (objfile
, rs6000_builtin_type_data
);
2086 /* We recognize types numbered from -NUMBER_RECOGNIZED to -1. */
2087 #define NUMBER_RECOGNIZED 34
2088 struct type
*rettype
= NULL
;
2090 if (typenum
>= 0 || typenum
< -NUMBER_RECOGNIZED
)
2092 complaint (&symfile_complaints
, _("Unknown builtin type %d"), typenum
);
2093 return objfile_type (objfile
)->builtin_error
;
2096 if (!negative_types
)
2098 /* This includes an empty slot for type number -0. */
2099 negative_types
= OBSTACK_CALLOC (&objfile
->objfile_obstack
,
2100 NUMBER_RECOGNIZED
+ 1, struct type
*);
2101 set_objfile_data (objfile
, rs6000_builtin_type_data
, negative_types
);
2104 if (negative_types
[-typenum
] != NULL
)
2105 return negative_types
[-typenum
];
2107 #if TARGET_CHAR_BIT != 8
2108 #error This code wrong for TARGET_CHAR_BIT not 8
2109 /* These definitions all assume that TARGET_CHAR_BIT is 8. I think
2110 that if that ever becomes not true, the correct fix will be to
2111 make the size in the struct type to be in bits, not in units of
2118 /* The size of this and all the other types are fixed, defined
2119 by the debugging format. If there is a type called "int" which
2120 is other than 32 bits, then it should use a new negative type
2121 number (or avoid negative type numbers for that case).
2122 See stabs.texinfo. */
2123 rettype
= init_integer_type (objfile
, 32, 0, "int");
2126 rettype
= init_integer_type (objfile
, 8, 0, "char");
2127 TYPE_NOSIGN (rettype
) = 1;
2130 rettype
= init_integer_type (objfile
, 16, 0, "short");
2133 rettype
= init_integer_type (objfile
, 32, 0, "long");
2136 rettype
= init_integer_type (objfile
, 8, 1, "unsigned char");
2139 rettype
= init_integer_type (objfile
, 8, 0, "signed char");
2142 rettype
= init_integer_type (objfile
, 16, 1, "unsigned short");
2145 rettype
= init_integer_type (objfile
, 32, 1, "unsigned int");
2148 rettype
= init_integer_type (objfile
, 32, 1, "unsigned");
2151 rettype
= init_integer_type (objfile
, 32, 1, "unsigned long");
2154 rettype
= init_type (objfile
, TYPE_CODE_VOID
, 1, "void");
2157 /* IEEE single precision (32 bit). */
2158 rettype
= init_float_type (objfile
, 32, "float",
2159 floatformats_ieee_single
);
2162 /* IEEE double precision (64 bit). */
2163 rettype
= init_float_type (objfile
, 64, "double",
2164 floatformats_ieee_double
);
2167 /* This is an IEEE double on the RS/6000, and different machines with
2168 different sizes for "long double" should use different negative
2169 type numbers. See stabs.texinfo. */
2170 rettype
= init_float_type (objfile
, 64, "long double",
2171 floatformats_ieee_double
);
2174 rettype
= init_integer_type (objfile
, 32, 0, "integer");
2177 rettype
= init_boolean_type (objfile
, 32, 1, "boolean");
2180 rettype
= init_float_type (objfile
, 32, "short real",
2181 floatformats_ieee_single
);
2184 rettype
= init_float_type (objfile
, 64, "real",
2185 floatformats_ieee_double
);
2188 rettype
= init_type (objfile
, TYPE_CODE_ERROR
, 0, "stringptr");
2191 rettype
= init_character_type (objfile
, 8, 1, "character");
2194 rettype
= init_boolean_type (objfile
, 8, 1, "logical*1");
2197 rettype
= init_boolean_type (objfile
, 16, 1, "logical*2");
2200 rettype
= init_boolean_type (objfile
, 32, 1, "logical*4");
2203 rettype
= init_boolean_type (objfile
, 32, 1, "logical");
2206 /* Complex type consisting of two IEEE single precision values. */
2207 rettype
= init_complex_type (objfile
, "complex",
2208 rs6000_builtin_type (12, objfile
));
2211 /* Complex type consisting of two IEEE double precision values. */
2212 rettype
= init_complex_type (objfile
, "double complex",
2213 rs6000_builtin_type (13, objfile
));
2216 rettype
= init_integer_type (objfile
, 8, 0, "integer*1");
2219 rettype
= init_integer_type (objfile
, 16, 0, "integer*2");
2222 rettype
= init_integer_type (objfile
, 32, 0, "integer*4");
2225 rettype
= init_character_type (objfile
, 16, 0, "wchar");
2228 rettype
= init_integer_type (objfile
, 64, 0, "long long");
2231 rettype
= init_integer_type (objfile
, 64, 1, "unsigned long long");
2234 rettype
= init_integer_type (objfile
, 64, 1, "logical*8");
2237 rettype
= init_integer_type (objfile
, 64, 0, "integer*8");
2240 negative_types
[-typenum
] = rettype
;
2244 /* This page contains subroutines of read_type. */
2246 /* Wrapper around method_name_from_physname to flag a complaint
2247 if there is an error. */
2250 stabs_method_name_from_physname (const char *physname
)
2254 method_name
= method_name_from_physname (physname
);
2256 if (method_name
== NULL
)
2258 complaint (&symfile_complaints
,
2259 _("Method has bad physname %s\n"), physname
);
2266 /* Read member function stabs info for C++ classes. The form of each member
2269 NAME :: TYPENUM[=type definition] ARGS : PHYSNAME ;
2271 An example with two member functions is:
2273 afunc1::20=##15;:i;2A.;afunc2::20:i;2A.;
2275 For the case of overloaded operators, the format is op$::*.funcs, where
2276 $ is the CPLUS_MARKER (usually '$'), `*' holds the place for an operator
2277 name (such as `+=') and `.' marks the end of the operator name.
2279 Returns 1 for success, 0 for failure. */
2282 read_member_functions (struct field_info
*fip
, char **pp
, struct type
*type
,
2283 struct objfile
*objfile
)
2290 struct next_fnfield
*next
;
2291 struct fn_field fn_field
;
2294 struct type
*look_ahead_type
;
2295 struct next_fnfieldlist
*new_fnlist
;
2296 struct next_fnfield
*new_sublist
;
2300 /* Process each list until we find something that is not a member function
2301 or find the end of the functions. */
2305 /* We should be positioned at the start of the function name.
2306 Scan forward to find the first ':' and if it is not the
2307 first of a "::" delimiter, then this is not a member function. */
2319 look_ahead_type
= NULL
;
2322 new_fnlist
= XCNEW (struct next_fnfieldlist
);
2323 make_cleanup (xfree
, new_fnlist
);
2325 if ((*pp
)[0] == 'o' && (*pp
)[1] == 'p' && is_cplus_marker ((*pp
)[2]))
2327 /* This is a completely wierd case. In order to stuff in the
2328 names that might contain colons (the usual name delimiter),
2329 Mike Tiemann defined a different name format which is
2330 signalled if the identifier is "op$". In that case, the
2331 format is "op$::XXXX." where XXXX is the name. This is
2332 used for names like "+" or "=". YUUUUUUUK! FIXME! */
2333 /* This lets the user type "break operator+".
2334 We could just put in "+" as the name, but that wouldn't
2336 static char opname
[32] = "op$";
2337 char *o
= opname
+ 3;
2339 /* Skip past '::'. */
2342 STABS_CONTINUE (pp
, objfile
);
2348 main_fn_name
= savestring (opname
, o
- opname
);
2354 main_fn_name
= savestring (*pp
, p
- *pp
);
2355 /* Skip past '::'. */
2358 new_fnlist
->fn_fieldlist
.name
= main_fn_name
;
2362 new_sublist
= XCNEW (struct next_fnfield
);
2363 make_cleanup (xfree
, new_sublist
);
2365 /* Check for and handle cretinous dbx symbol name continuation! */
2366 if (look_ahead_type
== NULL
)
2369 STABS_CONTINUE (pp
, objfile
);
2371 new_sublist
->fn_field
.type
= read_type (pp
, objfile
);
2374 /* Invalid symtab info for member function. */
2380 /* g++ version 1 kludge */
2381 new_sublist
->fn_field
.type
= look_ahead_type
;
2382 look_ahead_type
= NULL
;
2392 /* These are methods, not functions. */
2393 if (TYPE_CODE (new_sublist
->fn_field
.type
) == TYPE_CODE_FUNC
)
2394 TYPE_CODE (new_sublist
->fn_field
.type
) = TYPE_CODE_METHOD
;
2396 gdb_assert (TYPE_CODE (new_sublist
->fn_field
.type
)
2397 == TYPE_CODE_METHOD
);
2399 /* If this is just a stub, then we don't have the real name here. */
2400 if (TYPE_STUB (new_sublist
->fn_field
.type
))
2402 if (!TYPE_SELF_TYPE (new_sublist
->fn_field
.type
))
2403 set_type_self_type (new_sublist
->fn_field
.type
, type
);
2404 new_sublist
->fn_field
.is_stub
= 1;
2407 new_sublist
->fn_field
.physname
= savestring (*pp
, p
- *pp
);
2410 /* Set this member function's visibility fields. */
2413 case VISIBILITY_PRIVATE
:
2414 new_sublist
->fn_field
.is_private
= 1;
2416 case VISIBILITY_PROTECTED
:
2417 new_sublist
->fn_field
.is_protected
= 1;
2421 STABS_CONTINUE (pp
, objfile
);
2424 case 'A': /* Normal functions. */
2425 new_sublist
->fn_field
.is_const
= 0;
2426 new_sublist
->fn_field
.is_volatile
= 0;
2429 case 'B': /* `const' member functions. */
2430 new_sublist
->fn_field
.is_const
= 1;
2431 new_sublist
->fn_field
.is_volatile
= 0;
2434 case 'C': /* `volatile' member function. */
2435 new_sublist
->fn_field
.is_const
= 0;
2436 new_sublist
->fn_field
.is_volatile
= 1;
2439 case 'D': /* `const volatile' member function. */
2440 new_sublist
->fn_field
.is_const
= 1;
2441 new_sublist
->fn_field
.is_volatile
= 1;
2444 case '*': /* File compiled with g++ version 1 --
2450 complaint (&symfile_complaints
,
2451 _("const/volatile indicator missing, got '%c'"),
2461 /* virtual member function, followed by index.
2462 The sign bit is set to distinguish pointers-to-methods
2463 from virtual function indicies. Since the array is
2464 in words, the quantity must be shifted left by 1
2465 on 16 bit machine, and by 2 on 32 bit machine, forcing
2466 the sign bit out, and usable as a valid index into
2467 the array. Remove the sign bit here. */
2468 new_sublist
->fn_field
.voffset
=
2469 (0x7fffffff & read_huge_number (pp
, ';', &nbits
, 0)) + 2;
2473 STABS_CONTINUE (pp
, objfile
);
2474 if (**pp
== ';' || **pp
== '\0')
2476 /* Must be g++ version 1. */
2477 new_sublist
->fn_field
.fcontext
= 0;
2481 /* Figure out from whence this virtual function came.
2482 It may belong to virtual function table of
2483 one of its baseclasses. */
2484 look_ahead_type
= read_type (pp
, objfile
);
2487 /* g++ version 1 overloaded methods. */
2491 new_sublist
->fn_field
.fcontext
= look_ahead_type
;
2500 look_ahead_type
= NULL
;
2506 /* static member function. */
2508 int slen
= strlen (main_fn_name
);
2510 new_sublist
->fn_field
.voffset
= VOFFSET_STATIC
;
2512 /* For static member functions, we can't tell if they
2513 are stubbed, as they are put out as functions, and not as
2515 GCC v2 emits the fully mangled name if
2516 dbxout.c:flag_minimal_debug is not set, so we have to
2517 detect a fully mangled physname here and set is_stub
2518 accordingly. Fully mangled physnames in v2 start with
2519 the member function name, followed by two underscores.
2520 GCC v3 currently always emits stubbed member functions,
2521 but with fully mangled physnames, which start with _Z. */
2522 if (!(strncmp (new_sublist
->fn_field
.physname
,
2523 main_fn_name
, slen
) == 0
2524 && new_sublist
->fn_field
.physname
[slen
] == '_'
2525 && new_sublist
->fn_field
.physname
[slen
+ 1] == '_'))
2527 new_sublist
->fn_field
.is_stub
= 1;
2534 complaint (&symfile_complaints
,
2535 _("member function type missing, got '%c'"),
2537 /* Fall through into normal member function. */
2540 /* normal member function. */
2541 new_sublist
->fn_field
.voffset
= 0;
2542 new_sublist
->fn_field
.fcontext
= 0;
2546 new_sublist
->next
= sublist
;
2547 sublist
= new_sublist
;
2549 STABS_CONTINUE (pp
, objfile
);
2551 while (**pp
!= ';' && **pp
!= '\0');
2554 STABS_CONTINUE (pp
, objfile
);
2556 /* Skip GCC 3.X member functions which are duplicates of the callable
2557 constructor/destructor. */
2558 if (strcmp_iw (main_fn_name
, "__base_ctor ") == 0
2559 || strcmp_iw (main_fn_name
, "__base_dtor ") == 0
2560 || strcmp (main_fn_name
, "__deleting_dtor") == 0)
2562 xfree (main_fn_name
);
2567 int has_destructor
= 0, has_other
= 0;
2569 struct next_fnfield
*tmp_sublist
;
2571 /* Various versions of GCC emit various mostly-useless
2572 strings in the name field for special member functions.
2574 For stub methods, we need to defer correcting the name
2575 until we are ready to unstub the method, because the current
2576 name string is used by gdb_mangle_name. The only stub methods
2577 of concern here are GNU v2 operators; other methods have their
2578 names correct (see caveat below).
2580 For non-stub methods, in GNU v3, we have a complete physname.
2581 Therefore we can safely correct the name now. This primarily
2582 affects constructors and destructors, whose name will be
2583 __comp_ctor or __comp_dtor instead of Foo or ~Foo. Cast
2584 operators will also have incorrect names; for instance,
2585 "operator int" will be named "operator i" (i.e. the type is
2588 For non-stub methods in GNU v2, we have no easy way to
2589 know if we have a complete physname or not. For most
2590 methods the result depends on the platform (if CPLUS_MARKER
2591 can be `$' or `.', it will use minimal debug information, or
2592 otherwise the full physname will be included).
2594 Rather than dealing with this, we take a different approach.
2595 For v3 mangled names, we can use the full physname; for v2,
2596 we use cplus_demangle_opname (which is actually v2 specific),
2597 because the only interesting names are all operators - once again
2598 barring the caveat below. Skip this process if any method in the
2599 group is a stub, to prevent our fouling up the workings of
2602 The caveat: GCC 2.95.x (and earlier?) put constructors and
2603 destructors in the same method group. We need to split this
2604 into two groups, because they should have different names.
2605 So for each method group we check whether it contains both
2606 routines whose physname appears to be a destructor (the physnames
2607 for and destructors are always provided, due to quirks in v2
2608 mangling) and routines whose physname does not appear to be a
2609 destructor. If so then we break up the list into two halves.
2610 Even if the constructors and destructors aren't in the same group
2611 the destructor will still lack the leading tilde, so that also
2614 So, to summarize what we expect and handle here:
2616 Given Given Real Real Action
2617 method name physname physname method name
2619 __opi [none] __opi__3Foo operator int opname
2621 Foo _._3Foo _._3Foo ~Foo separate and
2623 operator i _ZN3FoocviEv _ZN3FoocviEv operator int demangle
2624 __comp_ctor _ZN3FooC1ERKS_ _ZN3FooC1ERKS_ Foo demangle
2627 tmp_sublist
= sublist
;
2628 while (tmp_sublist
!= NULL
)
2630 if (tmp_sublist
->fn_field
.is_stub
)
2632 if (tmp_sublist
->fn_field
.physname
[0] == '_'
2633 && tmp_sublist
->fn_field
.physname
[1] == 'Z')
2636 if (is_destructor_name (tmp_sublist
->fn_field
.physname
))
2641 tmp_sublist
= tmp_sublist
->next
;
2644 if (has_destructor
&& has_other
)
2646 struct next_fnfieldlist
*destr_fnlist
;
2647 struct next_fnfield
*last_sublist
;
2649 /* Create a new fn_fieldlist for the destructors. */
2651 destr_fnlist
= XCNEW (struct next_fnfieldlist
);
2652 make_cleanup (xfree
, destr_fnlist
);
2654 destr_fnlist
->fn_fieldlist
.name
2655 = obconcat (&objfile
->objfile_obstack
, "~",
2656 new_fnlist
->fn_fieldlist
.name
, (char *) NULL
);
2658 destr_fnlist
->fn_fieldlist
.fn_fields
=
2659 XOBNEWVEC (&objfile
->objfile_obstack
,
2660 struct fn_field
, has_destructor
);
2661 memset (destr_fnlist
->fn_fieldlist
.fn_fields
, 0,
2662 sizeof (struct fn_field
) * has_destructor
);
2663 tmp_sublist
= sublist
;
2664 last_sublist
= NULL
;
2666 while (tmp_sublist
!= NULL
)
2668 if (!is_destructor_name (tmp_sublist
->fn_field
.physname
))
2670 tmp_sublist
= tmp_sublist
->next
;
2674 destr_fnlist
->fn_fieldlist
.fn_fields
[i
++]
2675 = tmp_sublist
->fn_field
;
2677 last_sublist
->next
= tmp_sublist
->next
;
2679 sublist
= tmp_sublist
->next
;
2680 last_sublist
= tmp_sublist
;
2681 tmp_sublist
= tmp_sublist
->next
;
2684 destr_fnlist
->fn_fieldlist
.length
= has_destructor
;
2685 destr_fnlist
->next
= fip
->fnlist
;
2686 fip
->fnlist
= destr_fnlist
;
2688 length
-= has_destructor
;
2692 /* v3 mangling prevents the use of abbreviated physnames,
2693 so we can do this here. There are stubbed methods in v3
2695 - in -gstabs instead of -gstabs+
2696 - or for static methods, which are output as a function type
2697 instead of a method type. */
2698 char *new_method_name
=
2699 stabs_method_name_from_physname (sublist
->fn_field
.physname
);
2701 if (new_method_name
!= NULL
2702 && strcmp (new_method_name
,
2703 new_fnlist
->fn_fieldlist
.name
) != 0)
2705 new_fnlist
->fn_fieldlist
.name
= new_method_name
;
2706 xfree (main_fn_name
);
2709 xfree (new_method_name
);
2711 else if (has_destructor
&& new_fnlist
->fn_fieldlist
.name
[0] != '~')
2713 new_fnlist
->fn_fieldlist
.name
=
2714 obconcat (&objfile
->objfile_obstack
,
2715 "~", main_fn_name
, (char *)NULL
);
2716 xfree (main_fn_name
);
2720 char dem_opname
[256];
2723 ret
= cplus_demangle_opname (new_fnlist
->fn_fieldlist
.name
,
2724 dem_opname
, DMGL_ANSI
);
2726 ret
= cplus_demangle_opname (new_fnlist
->fn_fieldlist
.name
,
2729 new_fnlist
->fn_fieldlist
.name
2731 obstack_copy0 (&objfile
->objfile_obstack
, dem_opname
,
2732 strlen (dem_opname
)));
2733 xfree (main_fn_name
);
2736 new_fnlist
->fn_fieldlist
.fn_fields
= (struct fn_field
*)
2737 obstack_alloc (&objfile
->objfile_obstack
,
2738 sizeof (struct fn_field
) * length
);
2739 memset (new_fnlist
->fn_fieldlist
.fn_fields
, 0,
2740 sizeof (struct fn_field
) * length
);
2741 for (i
= length
; (i
--, sublist
); sublist
= sublist
->next
)
2743 new_fnlist
->fn_fieldlist
.fn_fields
[i
] = sublist
->fn_field
;
2746 new_fnlist
->fn_fieldlist
.length
= length
;
2747 new_fnlist
->next
= fip
->fnlist
;
2748 fip
->fnlist
= new_fnlist
;
2755 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
2756 TYPE_FN_FIELDLISTS (type
) = (struct fn_fieldlist
*)
2757 TYPE_ALLOC (type
, sizeof (struct fn_fieldlist
) * nfn_fields
);
2758 memset (TYPE_FN_FIELDLISTS (type
), 0,
2759 sizeof (struct fn_fieldlist
) * nfn_fields
);
2760 TYPE_NFN_FIELDS (type
) = nfn_fields
;
2766 /* Special GNU C++ name.
2768 Returns 1 for success, 0 for failure. "failure" means that we can't
2769 keep parsing and it's time for error_type(). */
2772 read_cpp_abbrev (struct field_info
*fip
, char **pp
, struct type
*type
,
2773 struct objfile
*objfile
)
2778 struct type
*context
;
2788 /* At this point, *pp points to something like "22:23=*22...",
2789 where the type number before the ':' is the "context" and
2790 everything after is a regular type definition. Lookup the
2791 type, find it's name, and construct the field name. */
2793 context
= read_type (pp
, objfile
);
2797 case 'f': /* $vf -- a virtual function table pointer */
2798 name
= type_name_no_tag (context
);
2803 fip
->list
->field
.name
= obconcat (&objfile
->objfile_obstack
,
2804 vptr_name
, name
, (char *) NULL
);
2807 case 'b': /* $vb -- a virtual bsomethingorother */
2808 name
= type_name_no_tag (context
);
2811 complaint (&symfile_complaints
,
2812 _("C++ abbreviated type name "
2813 "unknown at symtab pos %d"),
2817 fip
->list
->field
.name
= obconcat (&objfile
->objfile_obstack
, vb_name
,
2818 name
, (char *) NULL
);
2822 invalid_cpp_abbrev_complaint (*pp
);
2823 fip
->list
->field
.name
= obconcat (&objfile
->objfile_obstack
,
2824 "INVALID_CPLUSPLUS_ABBREV",
2829 /* At this point, *pp points to the ':'. Skip it and read the
2835 invalid_cpp_abbrev_complaint (*pp
);
2838 fip
->list
->field
.type
= read_type (pp
, objfile
);
2840 (*pp
)++; /* Skip the comma. */
2847 SET_FIELD_BITPOS (fip
->list
->field
,
2848 read_huge_number (pp
, ';', &nbits
, 0));
2852 /* This field is unpacked. */
2853 FIELD_BITSIZE (fip
->list
->field
) = 0;
2854 fip
->list
->visibility
= VISIBILITY_PRIVATE
;
2858 invalid_cpp_abbrev_complaint (*pp
);
2859 /* We have no idea what syntax an unrecognized abbrev would have, so
2860 better return 0. If we returned 1, we would need to at least advance
2861 *pp to avoid an infinite loop. */
2868 read_one_struct_field (struct field_info
*fip
, char **pp
, char *p
,
2869 struct type
*type
, struct objfile
*objfile
)
2871 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
2873 fip
->list
->field
.name
2874 = (const char *) obstack_copy0 (&objfile
->objfile_obstack
, *pp
, p
- *pp
);
2877 /* This means we have a visibility for a field coming. */
2881 fip
->list
->visibility
= *(*pp
)++;
2885 /* normal dbx-style format, no explicit visibility */
2886 fip
->list
->visibility
= VISIBILITY_PUBLIC
;
2889 fip
->list
->field
.type
= read_type (pp
, objfile
);
2894 /* Possible future hook for nested types. */
2897 fip
->list
->field
.bitpos
= (long) -2; /* nested type */
2907 /* Static class member. */
2908 SET_FIELD_PHYSNAME (fip
->list
->field
, savestring (*pp
, p
- *pp
));
2912 else if (**pp
!= ',')
2914 /* Bad structure-type format. */
2915 stabs_general_complaint ("bad structure-type format");
2919 (*pp
)++; /* Skip the comma. */
2924 SET_FIELD_BITPOS (fip
->list
->field
,
2925 read_huge_number (pp
, ',', &nbits
, 0));
2928 stabs_general_complaint ("bad structure-type format");
2931 FIELD_BITSIZE (fip
->list
->field
) = read_huge_number (pp
, ';', &nbits
, 0);
2934 stabs_general_complaint ("bad structure-type format");
2939 if (FIELD_BITPOS (fip
->list
->field
) == 0
2940 && FIELD_BITSIZE (fip
->list
->field
) == 0)
2942 /* This can happen in two cases: (1) at least for gcc 2.4.5 or so,
2943 it is a field which has been optimized out. The correct stab for
2944 this case is to use VISIBILITY_IGNORE, but that is a recent
2945 invention. (2) It is a 0-size array. For example
2946 union { int num; char str[0]; } foo. Printing _("<no value>" for
2947 str in "p foo" is OK, since foo.str (and thus foo.str[3])
2948 will continue to work, and a 0-size array as a whole doesn't
2949 have any contents to print.
2951 I suspect this probably could also happen with gcc -gstabs (not
2952 -gstabs+) for static fields, and perhaps other C++ extensions.
2953 Hopefully few people use -gstabs with gdb, since it is intended
2954 for dbx compatibility. */
2956 /* Ignore this field. */
2957 fip
->list
->visibility
= VISIBILITY_IGNORE
;
2961 /* Detect an unpacked field and mark it as such.
2962 dbx gives a bit size for all fields.
2963 Note that forward refs cannot be packed,
2964 and treat enums as if they had the width of ints. */
2966 struct type
*field_type
= check_typedef (FIELD_TYPE (fip
->list
->field
));
2968 if (TYPE_CODE (field_type
) != TYPE_CODE_INT
2969 && TYPE_CODE (field_type
) != TYPE_CODE_RANGE
2970 && TYPE_CODE (field_type
) != TYPE_CODE_BOOL
2971 && TYPE_CODE (field_type
) != TYPE_CODE_ENUM
)
2973 FIELD_BITSIZE (fip
->list
->field
) = 0;
2975 if ((FIELD_BITSIZE (fip
->list
->field
)
2976 == TARGET_CHAR_BIT
* TYPE_LENGTH (field_type
)
2977 || (TYPE_CODE (field_type
) == TYPE_CODE_ENUM
2978 && FIELD_BITSIZE (fip
->list
->field
)
2979 == gdbarch_int_bit (gdbarch
))
2982 FIELD_BITPOS (fip
->list
->field
) % 8 == 0)
2984 FIELD_BITSIZE (fip
->list
->field
) = 0;
2990 /* Read struct or class data fields. They have the form:
2992 NAME : [VISIBILITY] TYPENUM , BITPOS , BITSIZE ;
2994 At the end, we see a semicolon instead of a field.
2996 In C++, this may wind up being NAME:?TYPENUM:PHYSNAME; for
2999 The optional VISIBILITY is one of:
3001 '/0' (VISIBILITY_PRIVATE)
3002 '/1' (VISIBILITY_PROTECTED)
3003 '/2' (VISIBILITY_PUBLIC)
3004 '/9' (VISIBILITY_IGNORE)
3006 or nothing, for C style fields with public visibility.
3008 Returns 1 for success, 0 for failure. */
3011 read_struct_fields (struct field_info
*fip
, char **pp
, struct type
*type
,
3012 struct objfile
*objfile
)
3015 struct nextfield
*newobj
;
3017 /* We better set p right now, in case there are no fields at all... */
3021 /* Read each data member type until we find the terminating ';' at the end of
3022 the data member list, or break for some other reason such as finding the
3023 start of the member function list. */
3024 /* Stab string for structure/union does not end with two ';' in
3025 SUN C compiler 5.3 i.e. F6U2, hence check for end of string. */
3027 while (**pp
!= ';' && **pp
!= '\0')
3029 STABS_CONTINUE (pp
, objfile
);
3030 /* Get space to record the next field's data. */
3031 newobj
= XCNEW (struct nextfield
);
3032 make_cleanup (xfree
, newobj
);
3034 newobj
->next
= fip
->list
;
3037 /* Get the field name. */
3040 /* If is starts with CPLUS_MARKER it is a special abbreviation,
3041 unless the CPLUS_MARKER is followed by an underscore, in
3042 which case it is just the name of an anonymous type, which we
3043 should handle like any other type name. */
3045 if (is_cplus_marker (p
[0]) && p
[1] != '_')
3047 if (!read_cpp_abbrev (fip
, pp
, type
, objfile
))
3052 /* Look for the ':' that separates the field name from the field
3053 values. Data members are delimited by a single ':', while member
3054 functions are delimited by a pair of ':'s. When we hit the member
3055 functions (if any), terminate scan loop and return. */
3057 while (*p
!= ':' && *p
!= '\0')
3064 /* Check to see if we have hit the member functions yet. */
3069 read_one_struct_field (fip
, pp
, p
, type
, objfile
);
3071 if (p
[0] == ':' && p
[1] == ':')
3073 /* (the deleted) chill the list of fields: the last entry (at
3074 the head) is a partially constructed entry which we now
3076 fip
->list
= fip
->list
->next
;
3081 /* The stabs for C++ derived classes contain baseclass information which
3082 is marked by a '!' character after the total size. This function is
3083 called when we encounter the baseclass marker, and slurps up all the
3084 baseclass information.
3086 Immediately following the '!' marker is the number of base classes that
3087 the class is derived from, followed by information for each base class.
3088 For each base class, there are two visibility specifiers, a bit offset
3089 to the base class information within the derived class, a reference to
3090 the type for the base class, and a terminating semicolon.
3092 A typical example, with two base classes, would be "!2,020,19;0264,21;".
3094 Baseclass information marker __________________|| | | | | | |
3095 Number of baseclasses __________________________| | | | | | |
3096 Visibility specifiers (2) ________________________| | | | | |
3097 Offset in bits from start of class _________________| | | | |
3098 Type number for base class ___________________________| | | |
3099 Visibility specifiers (2) _______________________________| | |
3100 Offset in bits from start of class ________________________| |
3101 Type number of base class ____________________________________|
3103 Return 1 for success, 0 for (error-type-inducing) failure. */
3109 read_baseclasses (struct field_info
*fip
, char **pp
, struct type
*type
,
3110 struct objfile
*objfile
)
3113 struct nextfield
*newobj
;
3121 /* Skip the '!' baseclass information marker. */
3125 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
3129 TYPE_N_BASECLASSES (type
) = read_huge_number (pp
, ',', &nbits
, 0);
3135 /* Some stupid compilers have trouble with the following, so break
3136 it up into simpler expressions. */
3137 TYPE_FIELD_VIRTUAL_BITS (type
) = (B_TYPE
*)
3138 TYPE_ALLOC (type
, B_BYTES (TYPE_N_BASECLASSES (type
)));
3141 int num_bytes
= B_BYTES (TYPE_N_BASECLASSES (type
));
3144 pointer
= (char *) TYPE_ALLOC (type
, num_bytes
);
3145 TYPE_FIELD_VIRTUAL_BITS (type
) = (B_TYPE
*) pointer
;
3149 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type
), TYPE_N_BASECLASSES (type
));
3151 for (i
= 0; i
< TYPE_N_BASECLASSES (type
); i
++)
3153 newobj
= XCNEW (struct nextfield
);
3154 make_cleanup (xfree
, newobj
);
3156 newobj
->next
= fip
->list
;
3158 FIELD_BITSIZE (newobj
->field
) = 0; /* This should be an unpacked
3161 STABS_CONTINUE (pp
, objfile
);
3165 /* Nothing to do. */
3168 SET_TYPE_FIELD_VIRTUAL (type
, i
);
3171 /* Unknown character. Complain and treat it as non-virtual. */
3173 complaint (&symfile_complaints
,
3174 _("Unknown virtual character `%c' for baseclass"),
3180 newobj
->visibility
= *(*pp
)++;
3181 switch (newobj
->visibility
)
3183 case VISIBILITY_PRIVATE
:
3184 case VISIBILITY_PROTECTED
:
3185 case VISIBILITY_PUBLIC
:
3188 /* Bad visibility format. Complain and treat it as
3191 complaint (&symfile_complaints
,
3192 _("Unknown visibility `%c' for baseclass"),
3193 newobj
->visibility
);
3194 newobj
->visibility
= VISIBILITY_PUBLIC
;
3201 /* The remaining value is the bit offset of the portion of the object
3202 corresponding to this baseclass. Always zero in the absence of
3203 multiple inheritance. */
3205 SET_FIELD_BITPOS (newobj
->field
, read_huge_number (pp
, ',', &nbits
, 0));
3210 /* The last piece of baseclass information is the type of the
3211 base class. Read it, and remember it's type name as this
3214 newobj
->field
.type
= read_type (pp
, objfile
);
3215 newobj
->field
.name
= type_name_no_tag (newobj
->field
.type
);
3217 /* Skip trailing ';' and bump count of number of fields seen. */
3226 /* The tail end of stabs for C++ classes that contain a virtual function
3227 pointer contains a tilde, a %, and a type number.
3228 The type number refers to the base class (possibly this class itself) which
3229 contains the vtable pointer for the current class.
3231 This function is called when we have parsed all the method declarations,
3232 so we can look for the vptr base class info. */
3235 read_tilde_fields (struct field_info
*fip
, char **pp
, struct type
*type
,
3236 struct objfile
*objfile
)
3240 STABS_CONTINUE (pp
, objfile
);
3242 /* If we are positioned at a ';', then skip it. */
3252 if (**pp
== '=' || **pp
== '+' || **pp
== '-')
3254 /* Obsolete flags that used to indicate the presence
3255 of constructors and/or destructors. */
3259 /* Read either a '%' or the final ';'. */
3260 if (*(*pp
)++ == '%')
3262 /* The next number is the type number of the base class
3263 (possibly our own class) which supplies the vtable for
3264 this class. Parse it out, and search that class to find
3265 its vtable pointer, and install those into TYPE_VPTR_BASETYPE
3266 and TYPE_VPTR_FIELDNO. */
3271 t
= read_type (pp
, objfile
);
3273 while (*p
!= '\0' && *p
!= ';')
3279 /* Premature end of symbol. */
3283 set_type_vptr_basetype (type
, t
);
3284 if (type
== t
) /* Our own class provides vtbl ptr. */
3286 for (i
= TYPE_NFIELDS (t
) - 1;
3287 i
>= TYPE_N_BASECLASSES (t
);
3290 const char *name
= TYPE_FIELD_NAME (t
, i
);
3292 if (!strncmp (name
, vptr_name
, sizeof (vptr_name
) - 2)
3293 && is_cplus_marker (name
[sizeof (vptr_name
) - 2]))
3295 set_type_vptr_fieldno (type
, i
);
3299 /* Virtual function table field not found. */
3300 complaint (&symfile_complaints
,
3301 _("virtual function table pointer "
3302 "not found when defining class `%s'"),
3308 set_type_vptr_fieldno (type
, TYPE_VPTR_FIELDNO (t
));
3319 attach_fn_fields_to_type (struct field_info
*fip
, struct type
*type
)
3323 for (n
= TYPE_NFN_FIELDS (type
);
3324 fip
->fnlist
!= NULL
;
3325 fip
->fnlist
= fip
->fnlist
->next
)
3327 --n
; /* Circumvent Sun3 compiler bug. */
3328 TYPE_FN_FIELDLISTS (type
)[n
] = fip
->fnlist
->fn_fieldlist
;
3333 /* Create the vector of fields, and record how big it is.
3334 We need this info to record proper virtual function table information
3335 for this class's virtual functions. */
3338 attach_fields_to_type (struct field_info
*fip
, struct type
*type
,
3339 struct objfile
*objfile
)
3342 int non_public_fields
= 0;
3343 struct nextfield
*scan
;
3345 /* Count up the number of fields that we have, as well as taking note of
3346 whether or not there are any non-public fields, which requires us to
3347 allocate and build the private_field_bits and protected_field_bits
3350 for (scan
= fip
->list
; scan
!= NULL
; scan
= scan
->next
)
3353 if (scan
->visibility
!= VISIBILITY_PUBLIC
)
3355 non_public_fields
++;
3359 /* Now we know how many fields there are, and whether or not there are any
3360 non-public fields. Record the field count, allocate space for the
3361 array of fields, and create blank visibility bitfields if necessary. */
3363 TYPE_NFIELDS (type
) = nfields
;
3364 TYPE_FIELDS (type
) = (struct field
*)
3365 TYPE_ALLOC (type
, sizeof (struct field
) * nfields
);
3366 memset (TYPE_FIELDS (type
), 0, sizeof (struct field
) * nfields
);
3368 if (non_public_fields
)
3370 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
3372 TYPE_FIELD_PRIVATE_BITS (type
) =
3373 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
3374 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type
), nfields
);
3376 TYPE_FIELD_PROTECTED_BITS (type
) =
3377 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
3378 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type
), nfields
);
3380 TYPE_FIELD_IGNORE_BITS (type
) =
3381 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
3382 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type
), nfields
);
3385 /* Copy the saved-up fields into the field vector. Start from the
3386 head of the list, adding to the tail of the field array, so that
3387 they end up in the same order in the array in which they were
3388 added to the list. */
3390 while (nfields
-- > 0)
3392 TYPE_FIELD (type
, nfields
) = fip
->list
->field
;
3393 switch (fip
->list
->visibility
)
3395 case VISIBILITY_PRIVATE
:
3396 SET_TYPE_FIELD_PRIVATE (type
, nfields
);
3399 case VISIBILITY_PROTECTED
:
3400 SET_TYPE_FIELD_PROTECTED (type
, nfields
);
3403 case VISIBILITY_IGNORE
:
3404 SET_TYPE_FIELD_IGNORE (type
, nfields
);
3407 case VISIBILITY_PUBLIC
:
3411 /* Unknown visibility. Complain and treat it as public. */
3413 complaint (&symfile_complaints
,
3414 _("Unknown visibility `%c' for field"),
3415 fip
->list
->visibility
);
3419 fip
->list
= fip
->list
->next
;
3425 /* Complain that the compiler has emitted more than one definition for the
3426 structure type TYPE. */
3428 complain_about_struct_wipeout (struct type
*type
)
3430 const char *name
= "";
3431 const char *kind
= "";
3433 if (TYPE_TAG_NAME (type
))
3435 name
= TYPE_TAG_NAME (type
);
3436 switch (TYPE_CODE (type
))
3438 case TYPE_CODE_STRUCT
: kind
= "struct "; break;
3439 case TYPE_CODE_UNION
: kind
= "union "; break;
3440 case TYPE_CODE_ENUM
: kind
= "enum "; break;
3444 else if (TYPE_NAME (type
))
3446 name
= TYPE_NAME (type
);
3455 complaint (&symfile_complaints
,
3456 _("struct/union type gets multiply defined: %s%s"), kind
, name
);
3459 /* Set the length for all variants of a same main_type, which are
3460 connected in the closed chain.
3462 This is something that needs to be done when a type is defined *after*
3463 some cross references to this type have already been read. Consider
3464 for instance the following scenario where we have the following two
3467 .stabs "t:p(0,21)=*(0,22)=k(0,23)=xsdummy:",160,0,28,-24
3468 .stabs "dummy:T(0,23)=s16x:(0,1),0,3[...]"
3470 A stubbed version of type dummy is created while processing the first
3471 stabs entry. The length of that type is initially set to zero, since
3472 it is unknown at this point. Also, a "constant" variation of type
3473 "dummy" is created as well (this is the "(0,22)=k(0,23)" section of
3476 The second stabs entry allows us to replace the stubbed definition
3477 with the real definition. However, we still need to adjust the length
3478 of the "constant" variation of that type, as its length was left
3479 untouched during the main type replacement... */
3482 set_length_in_type_chain (struct type
*type
)
3484 struct type
*ntype
= TYPE_CHAIN (type
);
3486 while (ntype
!= type
)
3488 if (TYPE_LENGTH(ntype
) == 0)
3489 TYPE_LENGTH (ntype
) = TYPE_LENGTH (type
);
3491 complain_about_struct_wipeout (ntype
);
3492 ntype
= TYPE_CHAIN (ntype
);
3496 /* Read the description of a structure (or union type) and return an object
3497 describing the type.
3499 PP points to a character pointer that points to the next unconsumed token
3500 in the stabs string. For example, given stabs "A:T4=s4a:1,0,32;;",
3501 *PP will point to "4a:1,0,32;;".
3503 TYPE points to an incomplete type that needs to be filled in.
3505 OBJFILE points to the current objfile from which the stabs information is
3506 being read. (Note that it is redundant in that TYPE also contains a pointer
3507 to this same objfile, so it might be a good idea to eliminate it. FIXME).
3510 static struct type
*
3511 read_struct_type (char **pp
, struct type
*type
, enum type_code type_code
,
3512 struct objfile
*objfile
)
3514 struct cleanup
*back_to
;
3515 struct field_info fi
;
3520 /* When describing struct/union/class types in stabs, G++ always drops
3521 all qualifications from the name. So if you've got:
3522 struct A { ... struct B { ... }; ... };
3523 then G++ will emit stabs for `struct A::B' that call it simply
3524 `struct B'. Obviously, if you've got a real top-level definition for
3525 `struct B', or other nested definitions, this is going to cause
3528 Obviously, GDB can't fix this by itself, but it can at least avoid
3529 scribbling on existing structure type objects when new definitions
3531 if (! (TYPE_CODE (type
) == TYPE_CODE_UNDEF
3532 || TYPE_STUB (type
)))
3534 complain_about_struct_wipeout (type
);
3536 /* It's probably best to return the type unchanged. */
3540 back_to
= make_cleanup (null_cleanup
, 0);
3542 INIT_CPLUS_SPECIFIC (type
);
3543 TYPE_CODE (type
) = type_code
;
3544 TYPE_STUB (type
) = 0;
3546 /* First comes the total size in bytes. */
3551 TYPE_LENGTH (type
) = read_huge_number (pp
, 0, &nbits
, 0);
3554 do_cleanups (back_to
);
3555 return error_type (pp
, objfile
);
3557 set_length_in_type_chain (type
);
3560 /* Now read the baseclasses, if any, read the regular C struct or C++
3561 class member fields, attach the fields to the type, read the C++
3562 member functions, attach them to the type, and then read any tilde
3563 field (baseclass specifier for the class holding the main vtable). */
3565 if (!read_baseclasses (&fi
, pp
, type
, objfile
)
3566 || !read_struct_fields (&fi
, pp
, type
, objfile
)
3567 || !attach_fields_to_type (&fi
, type
, objfile
)
3568 || !read_member_functions (&fi
, pp
, type
, objfile
)
3569 || !attach_fn_fields_to_type (&fi
, type
)
3570 || !read_tilde_fields (&fi
, pp
, type
, objfile
))
3572 type
= error_type (pp
, objfile
);
3575 do_cleanups (back_to
);
3579 /* Read a definition of an array type,
3580 and create and return a suitable type object.
3581 Also creates a range type which represents the bounds of that
3584 static struct type
*
3585 read_array_type (char **pp
, struct type
*type
,
3586 struct objfile
*objfile
)
3588 struct type
*index_type
, *element_type
, *range_type
;
3593 /* Format of an array type:
3594 "ar<index type>;lower;upper;<array_contents_type>".
3595 OS9000: "arlower,upper;<array_contents_type>".
3597 Fortran adjustable arrays use Adigits or Tdigits for lower or upper;
3598 for these, produce a type like float[][]. */
3601 index_type
= read_type (pp
, objfile
);
3603 /* Improper format of array type decl. */
3604 return error_type (pp
, objfile
);
3608 if (!(**pp
>= '0' && **pp
<= '9') && **pp
!= '-')
3613 lower
= read_huge_number (pp
, ';', &nbits
, 0);
3616 return error_type (pp
, objfile
);
3618 if (!(**pp
>= '0' && **pp
<= '9') && **pp
!= '-')
3623 upper
= read_huge_number (pp
, ';', &nbits
, 0);
3625 return error_type (pp
, objfile
);
3627 element_type
= read_type (pp
, objfile
);
3636 create_static_range_type ((struct type
*) NULL
, index_type
, lower
, upper
);
3637 type
= create_array_type (type
, element_type
, range_type
);
3643 /* Read a definition of an enumeration type,
3644 and create and return a suitable type object.
3645 Also defines the symbols that represent the values of the type. */
3647 static struct type
*
3648 read_enum_type (char **pp
, struct type
*type
,
3649 struct objfile
*objfile
)
3651 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
3657 struct pending
**symlist
;
3658 struct pending
*osyms
, *syms
;
3661 int unsigned_enum
= 1;
3664 /* FIXME! The stabs produced by Sun CC merrily define things that ought
3665 to be file-scope, between N_FN entries, using N_LSYM. What's a mother
3666 to do? For now, force all enum values to file scope. */
3667 if (within_function
)
3668 symlist
= &local_symbols
;
3671 symlist
= &file_symbols
;
3673 o_nsyms
= osyms
? osyms
->nsyms
: 0;
3675 /* The aix4 compiler emits an extra field before the enum members;
3676 my guess is it's a type of some sort. Just ignore it. */
3679 /* Skip over the type. */
3683 /* Skip over the colon. */
3687 /* Read the value-names and their values.
3688 The input syntax is NAME:VALUE,NAME:VALUE, and so on.
3689 A semicolon or comma instead of a NAME means the end. */
3690 while (**pp
&& **pp
!= ';' && **pp
!= ',')
3692 STABS_CONTINUE (pp
, objfile
);
3696 name
= (char *) obstack_copy0 (&objfile
->objfile_obstack
, *pp
, p
- *pp
);
3698 n
= read_huge_number (pp
, ',', &nbits
, 0);
3700 return error_type (pp
, objfile
);
3702 sym
= allocate_symbol (objfile
);
3703 SYMBOL_SET_LINKAGE_NAME (sym
, name
);
3704 SYMBOL_SET_LANGUAGE (sym
, current_subfile
->language
,
3705 &objfile
->objfile_obstack
);
3706 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST
;
3707 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
3708 SYMBOL_VALUE (sym
) = n
;
3711 add_symbol_to_list (sym
, symlist
);
3716 (*pp
)++; /* Skip the semicolon. */
3718 /* Now fill in the fields of the type-structure. */
3720 TYPE_LENGTH (type
) = gdbarch_int_bit (gdbarch
) / HOST_CHAR_BIT
;
3721 set_length_in_type_chain (type
);
3722 TYPE_CODE (type
) = TYPE_CODE_ENUM
;
3723 TYPE_STUB (type
) = 0;
3725 TYPE_UNSIGNED (type
) = 1;
3726 TYPE_NFIELDS (type
) = nsyms
;
3727 TYPE_FIELDS (type
) = (struct field
*)
3728 TYPE_ALLOC (type
, sizeof (struct field
) * nsyms
);
3729 memset (TYPE_FIELDS (type
), 0, sizeof (struct field
) * nsyms
);
3731 /* Find the symbols for the values and put them into the type.
3732 The symbols can be found in the symlist that we put them on
3733 to cause them to be defined. osyms contains the old value
3734 of that symlist; everything up to there was defined by us. */
3735 /* Note that we preserve the order of the enum constants, so
3736 that in something like "enum {FOO, LAST_THING=FOO}" we print
3737 FOO, not LAST_THING. */
3739 for (syms
= *symlist
, n
= nsyms
- 1; syms
; syms
= syms
->next
)
3741 int last
= syms
== osyms
? o_nsyms
: 0;
3742 int j
= syms
->nsyms
;
3744 for (; --j
>= last
; --n
)
3746 struct symbol
*xsym
= syms
->symbol
[j
];
3748 SYMBOL_TYPE (xsym
) = type
;
3749 TYPE_FIELD_NAME (type
, n
) = SYMBOL_LINKAGE_NAME (xsym
);
3750 SET_FIELD_ENUMVAL (TYPE_FIELD (type
, n
), SYMBOL_VALUE (xsym
));
3751 TYPE_FIELD_BITSIZE (type
, n
) = 0;
3760 /* Sun's ACC uses a somewhat saner method for specifying the builtin
3761 typedefs in every file (for int, long, etc):
3763 type = b <signed> <width> <format type>; <offset>; <nbits>
3765 optional format type = c or b for char or boolean.
3766 offset = offset from high order bit to start bit of type.
3767 width is # bytes in object of this type, nbits is # bits in type.
3769 The width/offset stuff appears to be for small objects stored in
3770 larger ones (e.g. `shorts' in `int' registers). We ignore it for now,
3773 static struct type
*
3774 read_sun_builtin_type (char **pp
, int typenums
[2], struct objfile
*objfile
)
3779 int boolean_type
= 0;
3790 return error_type (pp
, objfile
);
3794 /* For some odd reason, all forms of char put a c here. This is strange
3795 because no other type has this honor. We can safely ignore this because
3796 we actually determine 'char'acterness by the number of bits specified in
3798 Boolean forms, e.g Fortran logical*X, put a b here. */
3802 else if (**pp
== 'b')
3808 /* The first number appears to be the number of bytes occupied
3809 by this type, except that unsigned short is 4 instead of 2.
3810 Since this information is redundant with the third number,
3811 we will ignore it. */
3812 read_huge_number (pp
, ';', &nbits
, 0);
3814 return error_type (pp
, objfile
);
3816 /* The second number is always 0, so ignore it too. */
3817 read_huge_number (pp
, ';', &nbits
, 0);
3819 return error_type (pp
, objfile
);
3821 /* The third number is the number of bits for this type. */
3822 type_bits
= read_huge_number (pp
, 0, &nbits
, 0);
3824 return error_type (pp
, objfile
);
3825 /* The type *should* end with a semicolon. If it are embedded
3826 in a larger type the semicolon may be the only way to know where
3827 the type ends. If this type is at the end of the stabstring we
3828 can deal with the omitted semicolon (but we don't have to like
3829 it). Don't bother to complain(), Sun's compiler omits the semicolon
3836 struct type
*type
= init_type (objfile
, TYPE_CODE_VOID
, 1, NULL
);
3838 TYPE_UNSIGNED (type
) = 1;
3843 return init_boolean_type (objfile
, type_bits
, unsigned_type
, NULL
);
3845 return init_integer_type (objfile
, type_bits
, unsigned_type
, NULL
);
3848 static struct type
*
3849 read_sun_floating_type (char **pp
, int typenums
[2], struct objfile
*objfile
)
3854 struct type
*rettype
;
3856 /* The first number has more details about the type, for example
3858 details
= read_huge_number (pp
, ';', &nbits
, 0);
3860 return error_type (pp
, objfile
);
3862 /* The second number is the number of bytes occupied by this type. */
3863 nbytes
= read_huge_number (pp
, ';', &nbits
, 0);
3865 return error_type (pp
, objfile
);
3867 nbits
= nbytes
* TARGET_CHAR_BIT
;
3869 if (details
== NF_COMPLEX
|| details
== NF_COMPLEX16
3870 || details
== NF_COMPLEX32
)
3872 rettype
= dbx_init_float_type (objfile
, nbits
/ 2);
3873 return init_complex_type (objfile
, NULL
, rettype
);
3876 return dbx_init_float_type (objfile
, nbits
);
3879 /* Read a number from the string pointed to by *PP.
3880 The value of *PP is advanced over the number.
3881 If END is nonzero, the character that ends the
3882 number must match END, or an error happens;
3883 and that character is skipped if it does match.
3884 If END is zero, *PP is left pointing to that character.
3886 If TWOS_COMPLEMENT_BITS is set to a strictly positive value and if
3887 the number is represented in an octal representation, assume that
3888 it is represented in a 2's complement representation with a size of
3889 TWOS_COMPLEMENT_BITS.
3891 If the number fits in a long, set *BITS to 0 and return the value.
3892 If not, set *BITS to be the number of bits in the number and return 0.
3894 If encounter garbage, set *BITS to -1 and return 0. */
3897 read_huge_number (char **pp
, int end
, int *bits
, int twos_complement_bits
)
3908 int twos_complement_representation
= 0;
3916 /* Leading zero means octal. GCC uses this to output values larger
3917 than an int (because that would be hard in decimal). */
3924 /* Skip extra zeros. */
3928 if (sign
> 0 && radix
== 8 && twos_complement_bits
> 0)
3930 /* Octal, possibly signed. Check if we have enough chars for a
3936 while ((c
= *p1
) >= '0' && c
< '8')
3940 if (len
> twos_complement_bits
/ 3
3941 || (twos_complement_bits
% 3 == 0
3942 && len
== twos_complement_bits
/ 3))
3944 /* Ok, we have enough characters for a signed value, check
3945 for signness by testing if the sign bit is set. */
3946 sign_bit
= (twos_complement_bits
% 3 + 2) % 3;
3948 if (c
& (1 << sign_bit
))
3950 /* Definitely signed. */
3951 twos_complement_representation
= 1;
3957 upper_limit
= LONG_MAX
/ radix
;
3959 while ((c
= *p
++) >= '0' && c
< ('0' + radix
))
3961 if (n
<= upper_limit
)
3963 if (twos_complement_representation
)
3965 /* Octal, signed, twos complement representation. In
3966 this case, n is the corresponding absolute value. */
3969 long sn
= c
- '0' - ((2 * (c
- '0')) | (2 << sign_bit
));
3981 /* unsigned representation */
3983 n
+= c
- '0'; /* FIXME this overflows anyway. */
3989 /* This depends on large values being output in octal, which is
3996 /* Ignore leading zeroes. */
4000 else if (c
== '2' || c
== '3')
4021 if (radix
== 8 && twos_complement_bits
> 0 && nbits
> twos_complement_bits
)
4023 /* We were supposed to parse a number with maximum
4024 TWOS_COMPLEMENT_BITS bits, but something went wrong. */
4035 /* Large decimal constants are an error (because it is hard to
4036 count how many bits are in them). */
4042 /* -0x7f is the same as 0x80. So deal with it by adding one to
4043 the number of bits. Two's complement represention octals
4044 can't have a '-' in front. */
4045 if (sign
== -1 && !twos_complement_representation
)
4056 /* It's *BITS which has the interesting information. */
4060 static struct type
*
4061 read_range_type (char **pp
, int typenums
[2], int type_size
,
4062 struct objfile
*objfile
)
4064 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
4065 char *orig_pp
= *pp
;
4070 struct type
*result_type
;
4071 struct type
*index_type
= NULL
;
4073 /* First comes a type we are a subrange of.
4074 In C it is usually 0, 1 or the type being defined. */
4075 if (read_type_number (pp
, rangenums
) != 0)
4076 return error_type (pp
, objfile
);
4077 self_subrange
= (rangenums
[0] == typenums
[0] &&
4078 rangenums
[1] == typenums
[1]);
4083 index_type
= read_type (pp
, objfile
);
4086 /* A semicolon should now follow; skip it. */
4090 /* The remaining two operands are usually lower and upper bounds
4091 of the range. But in some special cases they mean something else. */
4092 n2
= read_huge_number (pp
, ';', &n2bits
, type_size
);
4093 n3
= read_huge_number (pp
, ';', &n3bits
, type_size
);
4095 if (n2bits
== -1 || n3bits
== -1)
4096 return error_type (pp
, objfile
);
4099 goto handle_true_range
;
4101 /* If limits are huge, must be large integral type. */
4102 if (n2bits
!= 0 || n3bits
!= 0)
4104 char got_signed
= 0;
4105 char got_unsigned
= 0;
4106 /* Number of bits in the type. */
4109 /* If a type size attribute has been specified, the bounds of
4110 the range should fit in this size. If the lower bounds needs
4111 more bits than the upper bound, then the type is signed. */
4112 if (n2bits
<= type_size
&& n3bits
<= type_size
)
4114 if (n2bits
== type_size
&& n2bits
> n3bits
)
4120 /* Range from 0 to <large number> is an unsigned large integral type. */
4121 else if ((n2bits
== 0 && n2
== 0) && n3bits
!= 0)
4126 /* Range from <large number> to <large number>-1 is a large signed
4127 integral type. Take care of the case where <large number> doesn't
4128 fit in a long but <large number>-1 does. */
4129 else if ((n2bits
!= 0 && n3bits
!= 0 && n2bits
== n3bits
+ 1)
4130 || (n2bits
!= 0 && n3bits
== 0
4131 && (n2bits
== sizeof (long) * HOST_CHAR_BIT
)
4138 if (got_signed
|| got_unsigned
)
4139 return init_integer_type (objfile
, nbits
, got_unsigned
, NULL
);
4141 return error_type (pp
, objfile
);
4144 /* A type defined as a subrange of itself, with bounds both 0, is void. */
4145 if (self_subrange
&& n2
== 0 && n3
== 0)
4146 return init_type (objfile
, TYPE_CODE_VOID
, 1, NULL
);
4148 /* If n3 is zero and n2 is positive, we want a floating type, and n2
4149 is the width in bytes.
4151 Fortran programs appear to use this for complex types also. To
4152 distinguish between floats and complex, g77 (and others?) seem
4153 to use self-subranges for the complexes, and subranges of int for
4156 Also note that for complexes, g77 sets n2 to the size of one of
4157 the member floats, not the whole complex beast. My guess is that
4158 this was to work well with pre-COMPLEX versions of gdb. */
4160 if (n3
== 0 && n2
> 0)
4162 struct type
*float_type
4163 = dbx_init_float_type (objfile
, n2
* TARGET_CHAR_BIT
);
4166 return init_complex_type (objfile
, NULL
, float_type
);
4171 /* If the upper bound is -1, it must really be an unsigned integral. */
4173 else if (n2
== 0 && n3
== -1)
4175 int bits
= type_size
;
4179 /* We don't know its size. It is unsigned int or unsigned
4180 long. GCC 2.3.3 uses this for long long too, but that is
4181 just a GDB 3.5 compatibility hack. */
4182 bits
= gdbarch_int_bit (gdbarch
);
4185 return init_integer_type (objfile
, bits
, 1, NULL
);
4188 /* Special case: char is defined (Who knows why) as a subrange of
4189 itself with range 0-127. */
4190 else if (self_subrange
&& n2
== 0 && n3
== 127)
4192 struct type
*type
= init_integer_type (objfile
, 1, 0, NULL
);
4193 TYPE_NOSIGN (type
) = 1;
4196 /* We used to do this only for subrange of self or subrange of int. */
4199 /* -1 is used for the upper bound of (4 byte) "unsigned int" and
4200 "unsigned long", and we already checked for that,
4201 so don't need to test for it here. */
4204 /* n3 actually gives the size. */
4205 return init_integer_type (objfile
, -n3
* TARGET_CHAR_BIT
, 1, NULL
);
4207 /* Is n3 == 2**(8n)-1 for some integer n? Then it's an
4208 unsigned n-byte integer. But do require n to be a power of
4209 two; we don't want 3- and 5-byte integers flying around. */
4215 for (bytes
= 0; (bits
& 0xff) == 0xff; bytes
++)
4218 && ((bytes
- 1) & bytes
) == 0) /* "bytes is a power of two" */
4219 return init_integer_type (objfile
, bytes
* TARGET_CHAR_BIT
, 1, NULL
);
4222 /* I think this is for Convex "long long". Since I don't know whether
4223 Convex sets self_subrange, I also accept that particular size regardless
4224 of self_subrange. */
4225 else if (n3
== 0 && n2
< 0
4227 || n2
== -gdbarch_long_long_bit
4228 (gdbarch
) / TARGET_CHAR_BIT
))
4229 return init_integer_type (objfile
, -n2
* TARGET_CHAR_BIT
, 0, NULL
);
4230 else if (n2
== -n3
- 1)
4233 return init_integer_type (objfile
, 8, 0, NULL
);
4235 return init_integer_type (objfile
, 16, 0, NULL
);
4236 if (n3
== 0x7fffffff)
4237 return init_integer_type (objfile
, 32, 0, NULL
);
4240 /* We have a real range type on our hands. Allocate space and
4241 return a real pointer. */
4245 index_type
= objfile_type (objfile
)->builtin_int
;
4247 index_type
= *dbx_lookup_type (rangenums
, objfile
);
4248 if (index_type
== NULL
)
4250 /* Does this actually ever happen? Is that why we are worrying
4251 about dealing with it rather than just calling error_type? */
4253 complaint (&symfile_complaints
,
4254 _("base type %d of range type is not defined"), rangenums
[1]);
4256 index_type
= objfile_type (objfile
)->builtin_int
;
4260 = create_static_range_type ((struct type
*) NULL
, index_type
, n2
, n3
);
4261 return (result_type
);
4264 /* Read in an argument list. This is a list of types, separated by commas
4265 and terminated with END. Return the list of types read in, or NULL
4266 if there is an error. */
4268 static struct field
*
4269 read_args (char **pp
, int end
, struct objfile
*objfile
, int *nargsp
,
4272 /* FIXME! Remove this arbitrary limit! */
4273 struct type
*types
[1024]; /* Allow for fns of 1023 parameters. */
4280 /* Invalid argument list: no ','. */
4283 STABS_CONTINUE (pp
, objfile
);
4284 types
[n
++] = read_type (pp
, objfile
);
4286 (*pp
)++; /* get past `end' (the ':' character). */
4290 /* We should read at least the THIS parameter here. Some broken stabs
4291 output contained `(0,41),(0,42)=@s8;-16;,(0,43),(0,1);' where should
4292 have been present ";-16,(0,43)" reference instead. This way the
4293 excessive ";" marker prematurely stops the parameters parsing. */
4295 complaint (&symfile_complaints
, _("Invalid (empty) method arguments"));
4298 else if (TYPE_CODE (types
[n
- 1]) != TYPE_CODE_VOID
)
4306 rval
= XCNEWVEC (struct field
, n
);
4307 for (i
= 0; i
< n
; i
++)
4308 rval
[i
].type
= types
[i
];
4313 /* Common block handling. */
4315 /* List of symbols declared since the last BCOMM. This list is a tail
4316 of local_symbols. When ECOMM is seen, the symbols on the list
4317 are noted so their proper addresses can be filled in later,
4318 using the common block base address gotten from the assembler
4321 static struct pending
*common_block
;
4322 static int common_block_i
;
4324 /* Name of the current common block. We get it from the BCOMM instead of the
4325 ECOMM to match IBM documentation (even though IBM puts the name both places
4326 like everyone else). */
4327 static char *common_block_name
;
4329 /* Process a N_BCOMM symbol. The storage for NAME is not guaranteed
4330 to remain after this function returns. */
4333 common_block_start (char *name
, struct objfile
*objfile
)
4335 if (common_block_name
!= NULL
)
4337 complaint (&symfile_complaints
,
4338 _("Invalid symbol data: common block within common block"));
4340 common_block
= local_symbols
;
4341 common_block_i
= local_symbols
? local_symbols
->nsyms
: 0;
4342 common_block_name
= (char *) obstack_copy0 (&objfile
->objfile_obstack
, name
,
4346 /* Process a N_ECOMM symbol. */
4349 common_block_end (struct objfile
*objfile
)
4351 /* Symbols declared since the BCOMM are to have the common block
4352 start address added in when we know it. common_block and
4353 common_block_i point to the first symbol after the BCOMM in
4354 the local_symbols list; copy the list and hang it off the
4355 symbol for the common block name for later fixup. */
4358 struct pending
*newobj
= 0;
4359 struct pending
*next
;
4362 if (common_block_name
== NULL
)
4364 complaint (&symfile_complaints
, _("ECOMM symbol unmatched by BCOMM"));
4368 sym
= allocate_symbol (objfile
);
4369 /* Note: common_block_name already saved on objfile_obstack. */
4370 SYMBOL_SET_LINKAGE_NAME (sym
, common_block_name
);
4371 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
4373 /* Now we copy all the symbols which have been defined since the BCOMM. */
4375 /* Copy all the struct pendings before common_block. */
4376 for (next
= local_symbols
;
4377 next
!= NULL
&& next
!= common_block
;
4380 for (j
= 0; j
< next
->nsyms
; j
++)
4381 add_symbol_to_list (next
->symbol
[j
], &newobj
);
4384 /* Copy however much of COMMON_BLOCK we need. If COMMON_BLOCK is
4385 NULL, it means copy all the local symbols (which we already did
4388 if (common_block
!= NULL
)
4389 for (j
= common_block_i
; j
< common_block
->nsyms
; j
++)
4390 add_symbol_to_list (common_block
->symbol
[j
], &newobj
);
4392 SYMBOL_TYPE (sym
) = (struct type
*) newobj
;
4394 /* Should we be putting local_symbols back to what it was?
4397 i
= hashname (SYMBOL_LINKAGE_NAME (sym
));
4398 SYMBOL_VALUE_CHAIN (sym
) = global_sym_chain
[i
];
4399 global_sym_chain
[i
] = sym
;
4400 common_block_name
= NULL
;
4403 /* Add a common block's start address to the offset of each symbol
4404 declared to be in it (by being between a BCOMM/ECOMM pair that uses
4405 the common block name). */
4408 fix_common_block (struct symbol
*sym
, CORE_ADDR valu
)
4410 struct pending
*next
= (struct pending
*) SYMBOL_TYPE (sym
);
4412 for (; next
; next
= next
->next
)
4416 for (j
= next
->nsyms
- 1; j
>= 0; j
--)
4417 SYMBOL_VALUE_ADDRESS (next
->symbol
[j
]) += valu
;
4423 /* Add {TYPE, TYPENUMS} to the NONAME_UNDEFS vector.
4424 See add_undefined_type for more details. */
4427 add_undefined_type_noname (struct type
*type
, int typenums
[2])
4431 nat
.typenums
[0] = typenums
[0];
4432 nat
.typenums
[1] = typenums
[1];
4435 if (noname_undefs_length
== noname_undefs_allocated
)
4437 noname_undefs_allocated
*= 2;
4438 noname_undefs
= (struct nat
*)
4439 xrealloc ((char *) noname_undefs
,
4440 noname_undefs_allocated
* sizeof (struct nat
));
4442 noname_undefs
[noname_undefs_length
++] = nat
;
4445 /* Add TYPE to the UNDEF_TYPES vector.
4446 See add_undefined_type for more details. */
4449 add_undefined_type_1 (struct type
*type
)
4451 if (undef_types_length
== undef_types_allocated
)
4453 undef_types_allocated
*= 2;
4454 undef_types
= (struct type
**)
4455 xrealloc ((char *) undef_types
,
4456 undef_types_allocated
* sizeof (struct type
*));
4458 undef_types
[undef_types_length
++] = type
;
4461 /* What about types defined as forward references inside of a small lexical
4463 /* Add a type to the list of undefined types to be checked through
4464 once this file has been read in.
4466 In practice, we actually maintain two such lists: The first list
4467 (UNDEF_TYPES) is used for types whose name has been provided, and
4468 concerns forward references (eg 'xs' or 'xu' forward references);
4469 the second list (NONAME_UNDEFS) is used for types whose name is
4470 unknown at creation time, because they were referenced through
4471 their type number before the actual type was declared.
4472 This function actually adds the given type to the proper list. */
4475 add_undefined_type (struct type
*type
, int typenums
[2])
4477 if (TYPE_TAG_NAME (type
) == NULL
)
4478 add_undefined_type_noname (type
, typenums
);
4480 add_undefined_type_1 (type
);
4483 /* Try to fix all undefined types pushed on the UNDEF_TYPES vector. */
4486 cleanup_undefined_types_noname (struct objfile
*objfile
)
4490 for (i
= 0; i
< noname_undefs_length
; i
++)
4492 struct nat nat
= noname_undefs
[i
];
4495 type
= dbx_lookup_type (nat
.typenums
, objfile
);
4496 if (nat
.type
!= *type
&& TYPE_CODE (*type
) != TYPE_CODE_UNDEF
)
4498 /* The instance flags of the undefined type are still unset,
4499 and needs to be copied over from the reference type.
4500 Since replace_type expects them to be identical, we need
4501 to set these flags manually before hand. */
4502 TYPE_INSTANCE_FLAGS (nat
.type
) = TYPE_INSTANCE_FLAGS (*type
);
4503 replace_type (nat
.type
, *type
);
4507 noname_undefs_length
= 0;
4510 /* Go through each undefined type, see if it's still undefined, and fix it
4511 up if possible. We have two kinds of undefined types:
4513 TYPE_CODE_ARRAY: Array whose target type wasn't defined yet.
4514 Fix: update array length using the element bounds
4515 and the target type's length.
4516 TYPE_CODE_STRUCT, TYPE_CODE_UNION: Structure whose fields were not
4517 yet defined at the time a pointer to it was made.
4518 Fix: Do a full lookup on the struct/union tag. */
4521 cleanup_undefined_types_1 (void)
4525 /* Iterate over every undefined type, and look for a symbol whose type
4526 matches our undefined type. The symbol matches if:
4527 1. It is a typedef in the STRUCT domain;
4528 2. It has the same name, and same type code;
4529 3. The instance flags are identical.
4531 It is important to check the instance flags, because we have seen
4532 examples where the debug info contained definitions such as:
4534 "foo_t:t30=B31=xefoo_t:"
4536 In this case, we have created an undefined type named "foo_t" whose
4537 instance flags is null (when processing "xefoo_t"), and then created
4538 another type with the same name, but with different instance flags
4539 ('B' means volatile). I think that the definition above is wrong,
4540 since the same type cannot be volatile and non-volatile at the same
4541 time, but we need to be able to cope with it when it happens. The
4542 approach taken here is to treat these two types as different. */
4544 for (type
= undef_types
; type
< undef_types
+ undef_types_length
; type
++)
4546 switch (TYPE_CODE (*type
))
4549 case TYPE_CODE_STRUCT
:
4550 case TYPE_CODE_UNION
:
4551 case TYPE_CODE_ENUM
:
4553 /* Check if it has been defined since. Need to do this here
4554 as well as in check_typedef to deal with the (legitimate in
4555 C though not C++) case of several types with the same name
4556 in different source files. */
4557 if (TYPE_STUB (*type
))
4559 struct pending
*ppt
;
4561 /* Name of the type, without "struct" or "union". */
4562 const char *type_name
= TYPE_TAG_NAME (*type
);
4564 if (type_name
== NULL
)
4566 complaint (&symfile_complaints
, _("need a type name"));
4569 for (ppt
= file_symbols
; ppt
; ppt
= ppt
->next
)
4571 for (i
= 0; i
< ppt
->nsyms
; i
++)
4573 struct symbol
*sym
= ppt
->symbol
[i
];
4575 if (SYMBOL_CLASS (sym
) == LOC_TYPEDEF
4576 && SYMBOL_DOMAIN (sym
) == STRUCT_DOMAIN
4577 && (TYPE_CODE (SYMBOL_TYPE (sym
)) ==
4579 && (TYPE_INSTANCE_FLAGS (*type
) ==
4580 TYPE_INSTANCE_FLAGS (SYMBOL_TYPE (sym
)))
4581 && strcmp (SYMBOL_LINKAGE_NAME (sym
),
4583 replace_type (*type
, SYMBOL_TYPE (sym
));
4592 complaint (&symfile_complaints
,
4593 _("forward-referenced types left unresolved, "
4601 undef_types_length
= 0;
4604 /* Try to fix all the undefined types we ecountered while processing
4608 cleanup_undefined_stabs_types (struct objfile
*objfile
)
4610 cleanup_undefined_types_1 ();
4611 cleanup_undefined_types_noname (objfile
);
4614 /* Scan through all of the global symbols defined in the object file,
4615 assigning values to the debugging symbols that need to be assigned
4616 to. Get these symbols from the minimal symbol table. */
4619 scan_file_globals (struct objfile
*objfile
)
4622 struct minimal_symbol
*msymbol
;
4623 struct symbol
*sym
, *prev
;
4624 struct objfile
*resolve_objfile
;
4626 /* SVR4 based linkers copy referenced global symbols from shared
4627 libraries to the main executable.
4628 If we are scanning the symbols for a shared library, try to resolve
4629 them from the minimal symbols of the main executable first. */
4631 if (symfile_objfile
&& objfile
!= symfile_objfile
)
4632 resolve_objfile
= symfile_objfile
;
4634 resolve_objfile
= objfile
;
4638 /* Avoid expensive loop through all minimal symbols if there are
4639 no unresolved symbols. */
4640 for (hash
= 0; hash
< HASHSIZE
; hash
++)
4642 if (global_sym_chain
[hash
])
4645 if (hash
>= HASHSIZE
)
4648 ALL_OBJFILE_MSYMBOLS (resolve_objfile
, msymbol
)
4652 /* Skip static symbols. */
4653 switch (MSYMBOL_TYPE (msymbol
))
4665 /* Get the hash index and check all the symbols
4666 under that hash index. */
4668 hash
= hashname (MSYMBOL_LINKAGE_NAME (msymbol
));
4670 for (sym
= global_sym_chain
[hash
]; sym
;)
4672 if (strcmp (MSYMBOL_LINKAGE_NAME (msymbol
),
4673 SYMBOL_LINKAGE_NAME (sym
)) == 0)
4675 /* Splice this symbol out of the hash chain and
4676 assign the value we have to it. */
4679 SYMBOL_VALUE_CHAIN (prev
) = SYMBOL_VALUE_CHAIN (sym
);
4683 global_sym_chain
[hash
] = SYMBOL_VALUE_CHAIN (sym
);
4686 /* Check to see whether we need to fix up a common block. */
4687 /* Note: this code might be executed several times for
4688 the same symbol if there are multiple references. */
4691 if (SYMBOL_CLASS (sym
) == LOC_BLOCK
)
4693 fix_common_block (sym
,
4694 MSYMBOL_VALUE_ADDRESS (resolve_objfile
,
4699 SYMBOL_VALUE_ADDRESS (sym
)
4700 = MSYMBOL_VALUE_ADDRESS (resolve_objfile
, msymbol
);
4702 SYMBOL_SECTION (sym
) = MSYMBOL_SECTION (msymbol
);
4707 sym
= SYMBOL_VALUE_CHAIN (prev
);
4711 sym
= global_sym_chain
[hash
];
4717 sym
= SYMBOL_VALUE_CHAIN (sym
);
4721 if (resolve_objfile
== objfile
)
4723 resolve_objfile
= objfile
;
4726 /* Change the storage class of any remaining unresolved globals to
4727 LOC_UNRESOLVED and remove them from the chain. */
4728 for (hash
= 0; hash
< HASHSIZE
; hash
++)
4730 sym
= global_sym_chain
[hash
];
4734 sym
= SYMBOL_VALUE_CHAIN (sym
);
4736 /* Change the symbol address from the misleading chain value
4738 SYMBOL_VALUE_ADDRESS (prev
) = 0;
4740 /* Complain about unresolved common block symbols. */
4741 if (SYMBOL_CLASS (prev
) == LOC_STATIC
)
4742 SYMBOL_ACLASS_INDEX (prev
) = LOC_UNRESOLVED
;
4744 complaint (&symfile_complaints
,
4745 _("%s: common block `%s' from "
4746 "global_sym_chain unresolved"),
4747 objfile_name (objfile
), SYMBOL_PRINT_NAME (prev
));
4750 memset (global_sym_chain
, 0, sizeof (global_sym_chain
));
4753 /* Initialize anything that needs initializing when starting to read
4754 a fresh piece of a symbol file, e.g. reading in the stuff corresponding
4758 stabsread_init (void)
4762 /* Initialize anything that needs initializing when a completely new
4763 symbol file is specified (not just adding some symbols from another
4764 file, e.g. a shared library). */
4767 stabsread_new_init (void)
4769 /* Empty the hash table of global syms looking for values. */
4770 memset (global_sym_chain
, 0, sizeof (global_sym_chain
));
4773 /* Initialize anything that needs initializing at the same time as
4774 start_symtab() is called. */
4779 global_stabs
= NULL
; /* AIX COFF */
4780 /* Leave FILENUM of 0 free for builtin types and this file's types. */
4781 n_this_object_header_files
= 1;
4782 type_vector_length
= 0;
4783 type_vector
= (struct type
**) 0;
4785 /* FIXME: If common_block_name is not already NULL, we should complain(). */
4786 common_block_name
= NULL
;
4789 /* Call after end_symtab(). */
4796 xfree (type_vector
);
4799 type_vector_length
= 0;
4800 previous_stab_code
= 0;
4804 finish_global_stabs (struct objfile
*objfile
)
4808 patch_block_stabs (global_symbols
, global_stabs
, objfile
);
4809 xfree (global_stabs
);
4810 global_stabs
= NULL
;
4814 /* Find the end of the name, delimited by a ':', but don't match
4815 ObjC symbols which look like -[Foo bar::]:bla. */
4817 find_name_end (char *name
)
4821 if (s
[0] == '-' || *s
== '+')
4823 /* Must be an ObjC method symbol. */
4826 error (_("invalid symbol name \"%s\""), name
);
4828 s
= strchr (s
, ']');
4831 error (_("invalid symbol name \"%s\""), name
);
4833 return strchr (s
, ':');
4837 return strchr (s
, ':');
4841 /* Initializer for this module. */
4844 _initialize_stabsread (void)
4846 rs6000_builtin_type_data
= register_objfile_data ();
4848 undef_types_allocated
= 20;
4849 undef_types_length
= 0;
4850 undef_types
= XNEWVEC (struct type
*, undef_types_allocated
);
4852 noname_undefs_allocated
= 20;
4853 noname_undefs_length
= 0;
4854 noname_undefs
= XNEWVEC (struct nat
, noname_undefs_allocated
);
4856 stab_register_index
= register_symbol_register_impl (LOC_REGISTER
,
4857 &stab_register_funcs
);
4858 stab_regparm_index
= register_symbol_register_impl (LOC_REGPARM_ADDR
,
4859 &stab_register_funcs
);