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
),
1801 case 'f': /* Function returning another type */
1802 type1
= read_type (pp
, objfile
);
1803 type
= make_function_type (type1
, dbx_lookup_type (typenums
, objfile
));
1806 case 'g': /* Prototyped function. (Sun) */
1808 /* Unresolved questions:
1810 - According to Sun's ``STABS Interface Manual'', for 'f'
1811 and 'F' symbol descriptors, a `0' in the argument type list
1812 indicates a varargs function. But it doesn't say how 'g'
1813 type descriptors represent that info. Someone with access
1814 to Sun's toolchain should try it out.
1816 - According to the comment in define_symbol (search for
1817 `process_prototype_types:'), Sun emits integer arguments as
1818 types which ref themselves --- like `void' types. Do we
1819 have to deal with that here, too? Again, someone with
1820 access to Sun's toolchain should try it out and let us
1823 const char *type_start
= (*pp
) - 1;
1824 struct type
*return_type
= read_type (pp
, objfile
);
1825 struct type
*func_type
1826 = make_function_type (return_type
,
1827 dbx_lookup_type (typenums
, objfile
));
1830 struct type_list
*next
;
1834 while (**pp
&& **pp
!= '#')
1836 struct type
*arg_type
= read_type (pp
, objfile
);
1837 struct type_list
*newobj
= XALLOCA (struct type_list
);
1838 newobj
->type
= arg_type
;
1839 newobj
->next
= arg_types
;
1847 complaint (&symfile_complaints
,
1848 _("Prototyped function type didn't "
1849 "end arguments with `#':\n%s"),
1853 /* If there is just one argument whose type is `void', then
1854 that's just an empty argument list. */
1856 && ! arg_types
->next
1857 && TYPE_CODE (arg_types
->type
) == TYPE_CODE_VOID
)
1860 TYPE_FIELDS (func_type
)
1861 = (struct field
*) TYPE_ALLOC (func_type
,
1862 num_args
* sizeof (struct field
));
1863 memset (TYPE_FIELDS (func_type
), 0, num_args
* sizeof (struct field
));
1866 struct type_list
*t
;
1868 /* We stuck each argument type onto the front of the list
1869 when we read it, so the list is reversed. Build the
1870 fields array right-to-left. */
1871 for (t
= arg_types
, i
= num_args
- 1; t
; t
= t
->next
, i
--)
1872 TYPE_FIELD_TYPE (func_type
, i
) = t
->type
;
1874 TYPE_NFIELDS (func_type
) = num_args
;
1875 TYPE_PROTOTYPED (func_type
) = 1;
1881 case 'k': /* Const qualifier on some type (Sun) */
1882 type
= read_type (pp
, objfile
);
1883 type
= make_cv_type (1, TYPE_VOLATILE (type
), type
,
1884 dbx_lookup_type (typenums
, objfile
));
1887 case 'B': /* Volatile qual on some type (Sun) */
1888 type
= read_type (pp
, objfile
);
1889 type
= make_cv_type (TYPE_CONST (type
), 1, type
,
1890 dbx_lookup_type (typenums
, objfile
));
1894 if (isdigit (**pp
) || **pp
== '(' || **pp
== '-')
1895 { /* Member (class & variable) type */
1896 /* FIXME -- we should be doing smash_to_XXX types here. */
1898 struct type
*domain
= read_type (pp
, objfile
);
1899 struct type
*memtype
;
1902 /* Invalid member type data format. */
1903 return error_type (pp
, objfile
);
1906 memtype
= read_type (pp
, objfile
);
1907 type
= dbx_alloc_type (typenums
, objfile
);
1908 smash_to_memberptr_type (type
, domain
, memtype
);
1911 /* type attribute */
1915 /* Skip to the semicolon. */
1916 while (**pp
!= ';' && **pp
!= '\0')
1919 return error_type (pp
, objfile
);
1921 ++ * pp
; /* Skip the semicolon. */
1925 case 's': /* Size attribute */
1926 type_size
= atoi (attr
+ 1);
1931 case 'S': /* String attribute */
1932 /* FIXME: check to see if following type is array? */
1936 case 'V': /* Vector attribute */
1937 /* FIXME: check to see if following type is array? */
1942 /* Ignore unrecognized type attributes, so future compilers
1943 can invent new ones. */
1951 case '#': /* Method (class & fn) type */
1952 if ((*pp
)[0] == '#')
1954 /* We'll get the parameter types from the name. */
1955 struct type
*return_type
;
1958 return_type
= read_type (pp
, objfile
);
1959 if (*(*pp
)++ != ';')
1960 complaint (&symfile_complaints
,
1961 _("invalid (minimal) member type "
1962 "data format at symtab pos %d."),
1964 type
= allocate_stub_method (return_type
);
1965 if (typenums
[0] != -1)
1966 *dbx_lookup_type (typenums
, objfile
) = type
;
1970 struct type
*domain
= read_type (pp
, objfile
);
1971 struct type
*return_type
;
1976 /* Invalid member type data format. */
1977 return error_type (pp
, objfile
);
1981 return_type
= read_type (pp
, objfile
);
1982 args
= read_args (pp
, ';', objfile
, &nargs
, &varargs
);
1984 return error_type (pp
, objfile
);
1985 type
= dbx_alloc_type (typenums
, objfile
);
1986 smash_to_method_type (type
, domain
, return_type
, args
,
1991 case 'r': /* Range type */
1992 type
= read_range_type (pp
, typenums
, type_size
, objfile
);
1993 if (typenums
[0] != -1)
1994 *dbx_lookup_type (typenums
, objfile
) = type
;
1999 /* Sun ACC builtin int type */
2000 type
= read_sun_builtin_type (pp
, typenums
, objfile
);
2001 if (typenums
[0] != -1)
2002 *dbx_lookup_type (typenums
, objfile
) = type
;
2006 case 'R': /* Sun ACC builtin float type */
2007 type
= read_sun_floating_type (pp
, typenums
, objfile
);
2008 if (typenums
[0] != -1)
2009 *dbx_lookup_type (typenums
, objfile
) = type
;
2012 case 'e': /* Enumeration type */
2013 type
= dbx_alloc_type (typenums
, objfile
);
2014 type
= read_enum_type (pp
, type
, objfile
);
2015 if (typenums
[0] != -1)
2016 *dbx_lookup_type (typenums
, objfile
) = type
;
2019 case 's': /* Struct type */
2020 case 'u': /* Union type */
2022 enum type_code type_code
= TYPE_CODE_UNDEF
;
2023 type
= dbx_alloc_type (typenums
, objfile
);
2024 switch (type_descriptor
)
2027 type_code
= TYPE_CODE_STRUCT
;
2030 type_code
= TYPE_CODE_UNION
;
2033 type
= read_struct_type (pp
, type
, type_code
, objfile
);
2037 case 'a': /* Array type */
2039 return error_type (pp
, objfile
);
2042 type
= dbx_alloc_type (typenums
, objfile
);
2043 type
= read_array_type (pp
, type
, objfile
);
2045 TYPE_CODE (type
) = TYPE_CODE_STRING
;
2047 make_vector_type (type
);
2050 case 'S': /* Set type */
2051 type1
= read_type (pp
, objfile
);
2052 type
= create_set_type ((struct type
*) NULL
, type1
);
2053 if (typenums
[0] != -1)
2054 *dbx_lookup_type (typenums
, objfile
) = type
;
2058 --*pp
; /* Go back to the symbol in error. */
2059 /* Particularly important if it was \0! */
2060 return error_type (pp
, objfile
);
2065 warning (_("GDB internal error, type is NULL in stabsread.c."));
2066 return error_type (pp
, objfile
);
2069 /* Size specified in a type attribute overrides any other size. */
2070 if (type_size
!= -1)
2071 TYPE_LENGTH (type
) = (type_size
+ TARGET_CHAR_BIT
- 1) / TARGET_CHAR_BIT
;
2076 /* RS/6000 xlc/dbx combination uses a set of builtin types, starting from -1.
2077 Return the proper type node for a given builtin type number. */
2079 static const struct objfile_data
*rs6000_builtin_type_data
;
2081 static struct type
*
2082 rs6000_builtin_type (int typenum
, struct objfile
*objfile
)
2084 struct type
**negative_types
2085 = (struct type
**) objfile_data (objfile
, rs6000_builtin_type_data
);
2087 /* We recognize types numbered from -NUMBER_RECOGNIZED to -1. */
2088 #define NUMBER_RECOGNIZED 34
2089 struct type
*rettype
= NULL
;
2091 if (typenum
>= 0 || typenum
< -NUMBER_RECOGNIZED
)
2093 complaint (&symfile_complaints
, _("Unknown builtin type %d"), typenum
);
2094 return objfile_type (objfile
)->builtin_error
;
2097 if (!negative_types
)
2099 /* This includes an empty slot for type number -0. */
2100 negative_types
= OBSTACK_CALLOC (&objfile
->objfile_obstack
,
2101 NUMBER_RECOGNIZED
+ 1, struct type
*);
2102 set_objfile_data (objfile
, rs6000_builtin_type_data
, negative_types
);
2105 if (negative_types
[-typenum
] != NULL
)
2106 return negative_types
[-typenum
];
2108 #if TARGET_CHAR_BIT != 8
2109 #error This code wrong for TARGET_CHAR_BIT not 8
2110 /* These definitions all assume that TARGET_CHAR_BIT is 8. I think
2111 that if that ever becomes not true, the correct fix will be to
2112 make the size in the struct type to be in bits, not in units of
2119 /* The size of this and all the other types are fixed, defined
2120 by the debugging format. If there is a type called "int" which
2121 is other than 32 bits, then it should use a new negative type
2122 number (or avoid negative type numbers for that case).
2123 See stabs.texinfo. */
2124 rettype
= init_integer_type (objfile
, 32, 0, "int");
2127 rettype
= init_integer_type (objfile
, 8, 0, "char");
2128 TYPE_NOSIGN (rettype
) = 1;
2131 rettype
= init_integer_type (objfile
, 16, 0, "short");
2134 rettype
= init_integer_type (objfile
, 32, 0, "long");
2137 rettype
= init_integer_type (objfile
, 8, 1, "unsigned char");
2140 rettype
= init_integer_type (objfile
, 8, 0, "signed char");
2143 rettype
= init_integer_type (objfile
, 16, 1, "unsigned short");
2146 rettype
= init_integer_type (objfile
, 32, 1, "unsigned int");
2149 rettype
= init_integer_type (objfile
, 32, 1, "unsigned");
2152 rettype
= init_integer_type (objfile
, 32, 1, "unsigned long");
2155 rettype
= init_type (objfile
, TYPE_CODE_VOID
, 1, "void");
2158 /* IEEE single precision (32 bit). */
2159 rettype
= init_float_type (objfile
, 32, "float",
2160 floatformats_ieee_single
);
2163 /* IEEE double precision (64 bit). */
2164 rettype
= init_float_type (objfile
, 64, "double",
2165 floatformats_ieee_double
);
2168 /* This is an IEEE double on the RS/6000, and different machines with
2169 different sizes for "long double" should use different negative
2170 type numbers. See stabs.texinfo. */
2171 rettype
= init_float_type (objfile
, 64, "long double",
2172 floatformats_ieee_double
);
2175 rettype
= init_integer_type (objfile
, 32, 0, "integer");
2178 rettype
= init_boolean_type (objfile
, 32, 1, "boolean");
2181 rettype
= init_float_type (objfile
, 32, "short real",
2182 floatformats_ieee_single
);
2185 rettype
= init_float_type (objfile
, 64, "real",
2186 floatformats_ieee_double
);
2189 rettype
= init_type (objfile
, TYPE_CODE_ERROR
, 0, "stringptr");
2192 rettype
= init_character_type (objfile
, 8, 1, "character");
2195 rettype
= init_boolean_type (objfile
, 8, 1, "logical*1");
2198 rettype
= init_boolean_type (objfile
, 16, 1, "logical*2");
2201 rettype
= init_boolean_type (objfile
, 32, 1, "logical*4");
2204 rettype
= init_boolean_type (objfile
, 32, 1, "logical");
2207 /* Complex type consisting of two IEEE single precision values. */
2208 rettype
= init_complex_type (objfile
, "complex",
2209 rs6000_builtin_type (12, objfile
));
2212 /* Complex type consisting of two IEEE double precision values. */
2213 rettype
= init_complex_type (objfile
, "double complex",
2214 rs6000_builtin_type (13, objfile
));
2217 rettype
= init_integer_type (objfile
, 8, 0, "integer*1");
2220 rettype
= init_integer_type (objfile
, 16, 0, "integer*2");
2223 rettype
= init_integer_type (objfile
, 32, 0, "integer*4");
2226 rettype
= init_character_type (objfile
, 16, 0, "wchar");
2229 rettype
= init_integer_type (objfile
, 64, 0, "long long");
2232 rettype
= init_integer_type (objfile
, 64, 1, "unsigned long long");
2235 rettype
= init_integer_type (objfile
, 64, 1, "logical*8");
2238 rettype
= init_integer_type (objfile
, 64, 0, "integer*8");
2241 negative_types
[-typenum
] = rettype
;
2245 /* This page contains subroutines of read_type. */
2247 /* Wrapper around method_name_from_physname to flag a complaint
2248 if there is an error. */
2251 stabs_method_name_from_physname (const char *physname
)
2255 method_name
= method_name_from_physname (physname
);
2257 if (method_name
== NULL
)
2259 complaint (&symfile_complaints
,
2260 _("Method has bad physname %s\n"), physname
);
2267 /* Read member function stabs info for C++ classes. The form of each member
2270 NAME :: TYPENUM[=type definition] ARGS : PHYSNAME ;
2272 An example with two member functions is:
2274 afunc1::20=##15;:i;2A.;afunc2::20:i;2A.;
2276 For the case of overloaded operators, the format is op$::*.funcs, where
2277 $ is the CPLUS_MARKER (usually '$'), `*' holds the place for an operator
2278 name (such as `+=') and `.' marks the end of the operator name.
2280 Returns 1 for success, 0 for failure. */
2283 read_member_functions (struct field_info
*fip
, char **pp
, struct type
*type
,
2284 struct objfile
*objfile
)
2291 struct next_fnfield
*next
;
2292 struct fn_field fn_field
;
2295 struct type
*look_ahead_type
;
2296 struct next_fnfieldlist
*new_fnlist
;
2297 struct next_fnfield
*new_sublist
;
2301 /* Process each list until we find something that is not a member function
2302 or find the end of the functions. */
2306 /* We should be positioned at the start of the function name.
2307 Scan forward to find the first ':' and if it is not the
2308 first of a "::" delimiter, then this is not a member function. */
2320 look_ahead_type
= NULL
;
2323 new_fnlist
= XCNEW (struct next_fnfieldlist
);
2324 make_cleanup (xfree
, new_fnlist
);
2326 if ((*pp
)[0] == 'o' && (*pp
)[1] == 'p' && is_cplus_marker ((*pp
)[2]))
2328 /* This is a completely wierd case. In order to stuff in the
2329 names that might contain colons (the usual name delimiter),
2330 Mike Tiemann defined a different name format which is
2331 signalled if the identifier is "op$". In that case, the
2332 format is "op$::XXXX." where XXXX is the name. This is
2333 used for names like "+" or "=". YUUUUUUUK! FIXME! */
2334 /* This lets the user type "break operator+".
2335 We could just put in "+" as the name, but that wouldn't
2337 static char opname
[32] = "op$";
2338 char *o
= opname
+ 3;
2340 /* Skip past '::'. */
2343 STABS_CONTINUE (pp
, objfile
);
2349 main_fn_name
= savestring (opname
, o
- opname
);
2355 main_fn_name
= savestring (*pp
, p
- *pp
);
2356 /* Skip past '::'. */
2359 new_fnlist
->fn_fieldlist
.name
= main_fn_name
;
2363 new_sublist
= XCNEW (struct next_fnfield
);
2364 make_cleanup (xfree
, new_sublist
);
2366 /* Check for and handle cretinous dbx symbol name continuation! */
2367 if (look_ahead_type
== NULL
)
2370 STABS_CONTINUE (pp
, objfile
);
2372 new_sublist
->fn_field
.type
= read_type (pp
, objfile
);
2375 /* Invalid symtab info for member function. */
2381 /* g++ version 1 kludge */
2382 new_sublist
->fn_field
.type
= look_ahead_type
;
2383 look_ahead_type
= NULL
;
2393 /* These are methods, not functions. */
2394 if (TYPE_CODE (new_sublist
->fn_field
.type
) == TYPE_CODE_FUNC
)
2395 TYPE_CODE (new_sublist
->fn_field
.type
) = TYPE_CODE_METHOD
;
2397 gdb_assert (TYPE_CODE (new_sublist
->fn_field
.type
)
2398 == TYPE_CODE_METHOD
);
2400 /* If this is just a stub, then we don't have the real name here. */
2401 if (TYPE_STUB (new_sublist
->fn_field
.type
))
2403 if (!TYPE_SELF_TYPE (new_sublist
->fn_field
.type
))
2404 set_type_self_type (new_sublist
->fn_field
.type
, type
);
2405 new_sublist
->fn_field
.is_stub
= 1;
2408 new_sublist
->fn_field
.physname
= savestring (*pp
, p
- *pp
);
2411 /* Set this member function's visibility fields. */
2414 case VISIBILITY_PRIVATE
:
2415 new_sublist
->fn_field
.is_private
= 1;
2417 case VISIBILITY_PROTECTED
:
2418 new_sublist
->fn_field
.is_protected
= 1;
2422 STABS_CONTINUE (pp
, objfile
);
2425 case 'A': /* Normal functions. */
2426 new_sublist
->fn_field
.is_const
= 0;
2427 new_sublist
->fn_field
.is_volatile
= 0;
2430 case 'B': /* `const' member functions. */
2431 new_sublist
->fn_field
.is_const
= 1;
2432 new_sublist
->fn_field
.is_volatile
= 0;
2435 case 'C': /* `volatile' member function. */
2436 new_sublist
->fn_field
.is_const
= 0;
2437 new_sublist
->fn_field
.is_volatile
= 1;
2440 case 'D': /* `const volatile' member function. */
2441 new_sublist
->fn_field
.is_const
= 1;
2442 new_sublist
->fn_field
.is_volatile
= 1;
2445 case '*': /* File compiled with g++ version 1 --
2451 complaint (&symfile_complaints
,
2452 _("const/volatile indicator missing, got '%c'"),
2462 /* virtual member function, followed by index.
2463 The sign bit is set to distinguish pointers-to-methods
2464 from virtual function indicies. Since the array is
2465 in words, the quantity must be shifted left by 1
2466 on 16 bit machine, and by 2 on 32 bit machine, forcing
2467 the sign bit out, and usable as a valid index into
2468 the array. Remove the sign bit here. */
2469 new_sublist
->fn_field
.voffset
=
2470 (0x7fffffff & read_huge_number (pp
, ';', &nbits
, 0)) + 2;
2474 STABS_CONTINUE (pp
, objfile
);
2475 if (**pp
== ';' || **pp
== '\0')
2477 /* Must be g++ version 1. */
2478 new_sublist
->fn_field
.fcontext
= 0;
2482 /* Figure out from whence this virtual function came.
2483 It may belong to virtual function table of
2484 one of its baseclasses. */
2485 look_ahead_type
= read_type (pp
, objfile
);
2488 /* g++ version 1 overloaded methods. */
2492 new_sublist
->fn_field
.fcontext
= look_ahead_type
;
2501 look_ahead_type
= NULL
;
2507 /* static member function. */
2509 int slen
= strlen (main_fn_name
);
2511 new_sublist
->fn_field
.voffset
= VOFFSET_STATIC
;
2513 /* For static member functions, we can't tell if they
2514 are stubbed, as they are put out as functions, and not as
2516 GCC v2 emits the fully mangled name if
2517 dbxout.c:flag_minimal_debug is not set, so we have to
2518 detect a fully mangled physname here and set is_stub
2519 accordingly. Fully mangled physnames in v2 start with
2520 the member function name, followed by two underscores.
2521 GCC v3 currently always emits stubbed member functions,
2522 but with fully mangled physnames, which start with _Z. */
2523 if (!(strncmp (new_sublist
->fn_field
.physname
,
2524 main_fn_name
, slen
) == 0
2525 && new_sublist
->fn_field
.physname
[slen
] == '_'
2526 && new_sublist
->fn_field
.physname
[slen
+ 1] == '_'))
2528 new_sublist
->fn_field
.is_stub
= 1;
2535 complaint (&symfile_complaints
,
2536 _("member function type missing, got '%c'"),
2538 /* Fall through into normal member function. */
2541 /* normal member function. */
2542 new_sublist
->fn_field
.voffset
= 0;
2543 new_sublist
->fn_field
.fcontext
= 0;
2547 new_sublist
->next
= sublist
;
2548 sublist
= new_sublist
;
2550 STABS_CONTINUE (pp
, objfile
);
2552 while (**pp
!= ';' && **pp
!= '\0');
2555 STABS_CONTINUE (pp
, objfile
);
2557 /* Skip GCC 3.X member functions which are duplicates of the callable
2558 constructor/destructor. */
2559 if (strcmp_iw (main_fn_name
, "__base_ctor ") == 0
2560 || strcmp_iw (main_fn_name
, "__base_dtor ") == 0
2561 || strcmp (main_fn_name
, "__deleting_dtor") == 0)
2563 xfree (main_fn_name
);
2568 int has_destructor
= 0, has_other
= 0;
2570 struct next_fnfield
*tmp_sublist
;
2572 /* Various versions of GCC emit various mostly-useless
2573 strings in the name field for special member functions.
2575 For stub methods, we need to defer correcting the name
2576 until we are ready to unstub the method, because the current
2577 name string is used by gdb_mangle_name. The only stub methods
2578 of concern here are GNU v2 operators; other methods have their
2579 names correct (see caveat below).
2581 For non-stub methods, in GNU v3, we have a complete physname.
2582 Therefore we can safely correct the name now. This primarily
2583 affects constructors and destructors, whose name will be
2584 __comp_ctor or __comp_dtor instead of Foo or ~Foo. Cast
2585 operators will also have incorrect names; for instance,
2586 "operator int" will be named "operator i" (i.e. the type is
2589 For non-stub methods in GNU v2, we have no easy way to
2590 know if we have a complete physname or not. For most
2591 methods the result depends on the platform (if CPLUS_MARKER
2592 can be `$' or `.', it will use minimal debug information, or
2593 otherwise the full physname will be included).
2595 Rather than dealing with this, we take a different approach.
2596 For v3 mangled names, we can use the full physname; for v2,
2597 we use cplus_demangle_opname (which is actually v2 specific),
2598 because the only interesting names are all operators - once again
2599 barring the caveat below. Skip this process if any method in the
2600 group is a stub, to prevent our fouling up the workings of
2603 The caveat: GCC 2.95.x (and earlier?) put constructors and
2604 destructors in the same method group. We need to split this
2605 into two groups, because they should have different names.
2606 So for each method group we check whether it contains both
2607 routines whose physname appears to be a destructor (the physnames
2608 for and destructors are always provided, due to quirks in v2
2609 mangling) and routines whose physname does not appear to be a
2610 destructor. If so then we break up the list into two halves.
2611 Even if the constructors and destructors aren't in the same group
2612 the destructor will still lack the leading tilde, so that also
2615 So, to summarize what we expect and handle here:
2617 Given Given Real Real Action
2618 method name physname physname method name
2620 __opi [none] __opi__3Foo operator int opname
2622 Foo _._3Foo _._3Foo ~Foo separate and
2624 operator i _ZN3FoocviEv _ZN3FoocviEv operator int demangle
2625 __comp_ctor _ZN3FooC1ERKS_ _ZN3FooC1ERKS_ Foo demangle
2628 tmp_sublist
= sublist
;
2629 while (tmp_sublist
!= NULL
)
2631 if (tmp_sublist
->fn_field
.is_stub
)
2633 if (tmp_sublist
->fn_field
.physname
[0] == '_'
2634 && tmp_sublist
->fn_field
.physname
[1] == 'Z')
2637 if (is_destructor_name (tmp_sublist
->fn_field
.physname
))
2642 tmp_sublist
= tmp_sublist
->next
;
2645 if (has_destructor
&& has_other
)
2647 struct next_fnfieldlist
*destr_fnlist
;
2648 struct next_fnfield
*last_sublist
;
2650 /* Create a new fn_fieldlist for the destructors. */
2652 destr_fnlist
= XCNEW (struct next_fnfieldlist
);
2653 make_cleanup (xfree
, destr_fnlist
);
2655 destr_fnlist
->fn_fieldlist
.name
2656 = obconcat (&objfile
->objfile_obstack
, "~",
2657 new_fnlist
->fn_fieldlist
.name
, (char *) NULL
);
2659 destr_fnlist
->fn_fieldlist
.fn_fields
=
2660 XOBNEWVEC (&objfile
->objfile_obstack
,
2661 struct fn_field
, has_destructor
);
2662 memset (destr_fnlist
->fn_fieldlist
.fn_fields
, 0,
2663 sizeof (struct fn_field
) * has_destructor
);
2664 tmp_sublist
= sublist
;
2665 last_sublist
= NULL
;
2667 while (tmp_sublist
!= NULL
)
2669 if (!is_destructor_name (tmp_sublist
->fn_field
.physname
))
2671 tmp_sublist
= tmp_sublist
->next
;
2675 destr_fnlist
->fn_fieldlist
.fn_fields
[i
++]
2676 = tmp_sublist
->fn_field
;
2678 last_sublist
->next
= tmp_sublist
->next
;
2680 sublist
= tmp_sublist
->next
;
2681 last_sublist
= tmp_sublist
;
2682 tmp_sublist
= tmp_sublist
->next
;
2685 destr_fnlist
->fn_fieldlist
.length
= has_destructor
;
2686 destr_fnlist
->next
= fip
->fnlist
;
2687 fip
->fnlist
= destr_fnlist
;
2689 length
-= has_destructor
;
2693 /* v3 mangling prevents the use of abbreviated physnames,
2694 so we can do this here. There are stubbed methods in v3
2696 - in -gstabs instead of -gstabs+
2697 - or for static methods, which are output as a function type
2698 instead of a method type. */
2699 char *new_method_name
=
2700 stabs_method_name_from_physname (sublist
->fn_field
.physname
);
2702 if (new_method_name
!= NULL
2703 && strcmp (new_method_name
,
2704 new_fnlist
->fn_fieldlist
.name
) != 0)
2706 new_fnlist
->fn_fieldlist
.name
= new_method_name
;
2707 xfree (main_fn_name
);
2710 xfree (new_method_name
);
2712 else if (has_destructor
&& new_fnlist
->fn_fieldlist
.name
[0] != '~')
2714 new_fnlist
->fn_fieldlist
.name
=
2715 obconcat (&objfile
->objfile_obstack
,
2716 "~", main_fn_name
, (char *)NULL
);
2717 xfree (main_fn_name
);
2721 char dem_opname
[256];
2724 ret
= cplus_demangle_opname (new_fnlist
->fn_fieldlist
.name
,
2725 dem_opname
, DMGL_ANSI
);
2727 ret
= cplus_demangle_opname (new_fnlist
->fn_fieldlist
.name
,
2730 new_fnlist
->fn_fieldlist
.name
2732 obstack_copy0 (&objfile
->objfile_obstack
, dem_opname
,
2733 strlen (dem_opname
)));
2734 xfree (main_fn_name
);
2737 new_fnlist
->fn_fieldlist
.fn_fields
= (struct fn_field
*)
2738 obstack_alloc (&objfile
->objfile_obstack
,
2739 sizeof (struct fn_field
) * length
);
2740 memset (new_fnlist
->fn_fieldlist
.fn_fields
, 0,
2741 sizeof (struct fn_field
) * length
);
2742 for (i
= length
; (i
--, sublist
); sublist
= sublist
->next
)
2744 new_fnlist
->fn_fieldlist
.fn_fields
[i
] = sublist
->fn_field
;
2747 new_fnlist
->fn_fieldlist
.length
= length
;
2748 new_fnlist
->next
= fip
->fnlist
;
2749 fip
->fnlist
= new_fnlist
;
2756 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
2757 TYPE_FN_FIELDLISTS (type
) = (struct fn_fieldlist
*)
2758 TYPE_ALLOC (type
, sizeof (struct fn_fieldlist
) * nfn_fields
);
2759 memset (TYPE_FN_FIELDLISTS (type
), 0,
2760 sizeof (struct fn_fieldlist
) * nfn_fields
);
2761 TYPE_NFN_FIELDS (type
) = nfn_fields
;
2767 /* Special GNU C++ name.
2769 Returns 1 for success, 0 for failure. "failure" means that we can't
2770 keep parsing and it's time for error_type(). */
2773 read_cpp_abbrev (struct field_info
*fip
, char **pp
, struct type
*type
,
2774 struct objfile
*objfile
)
2779 struct type
*context
;
2789 /* At this point, *pp points to something like "22:23=*22...",
2790 where the type number before the ':' is the "context" and
2791 everything after is a regular type definition. Lookup the
2792 type, find it's name, and construct the field name. */
2794 context
= read_type (pp
, objfile
);
2798 case 'f': /* $vf -- a virtual function table pointer */
2799 name
= type_name_no_tag (context
);
2804 fip
->list
->field
.name
= obconcat (&objfile
->objfile_obstack
,
2805 vptr_name
, name
, (char *) NULL
);
2808 case 'b': /* $vb -- a virtual bsomethingorother */
2809 name
= type_name_no_tag (context
);
2812 complaint (&symfile_complaints
,
2813 _("C++ abbreviated type name "
2814 "unknown at symtab pos %d"),
2818 fip
->list
->field
.name
= obconcat (&objfile
->objfile_obstack
, vb_name
,
2819 name
, (char *) NULL
);
2823 invalid_cpp_abbrev_complaint (*pp
);
2824 fip
->list
->field
.name
= obconcat (&objfile
->objfile_obstack
,
2825 "INVALID_CPLUSPLUS_ABBREV",
2830 /* At this point, *pp points to the ':'. Skip it and read the
2836 invalid_cpp_abbrev_complaint (*pp
);
2839 fip
->list
->field
.type
= read_type (pp
, objfile
);
2841 (*pp
)++; /* Skip the comma. */
2848 SET_FIELD_BITPOS (fip
->list
->field
,
2849 read_huge_number (pp
, ';', &nbits
, 0));
2853 /* This field is unpacked. */
2854 FIELD_BITSIZE (fip
->list
->field
) = 0;
2855 fip
->list
->visibility
= VISIBILITY_PRIVATE
;
2859 invalid_cpp_abbrev_complaint (*pp
);
2860 /* We have no idea what syntax an unrecognized abbrev would have, so
2861 better return 0. If we returned 1, we would need to at least advance
2862 *pp to avoid an infinite loop. */
2869 read_one_struct_field (struct field_info
*fip
, char **pp
, char *p
,
2870 struct type
*type
, struct objfile
*objfile
)
2872 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
2874 fip
->list
->field
.name
2875 = (const char *) obstack_copy0 (&objfile
->objfile_obstack
, *pp
, p
- *pp
);
2878 /* This means we have a visibility for a field coming. */
2882 fip
->list
->visibility
= *(*pp
)++;
2886 /* normal dbx-style format, no explicit visibility */
2887 fip
->list
->visibility
= VISIBILITY_PUBLIC
;
2890 fip
->list
->field
.type
= read_type (pp
, objfile
);
2895 /* Possible future hook for nested types. */
2898 fip
->list
->field
.bitpos
= (long) -2; /* nested type */
2908 /* Static class member. */
2909 SET_FIELD_PHYSNAME (fip
->list
->field
, savestring (*pp
, p
- *pp
));
2913 else if (**pp
!= ',')
2915 /* Bad structure-type format. */
2916 stabs_general_complaint ("bad structure-type format");
2920 (*pp
)++; /* Skip the comma. */
2925 SET_FIELD_BITPOS (fip
->list
->field
,
2926 read_huge_number (pp
, ',', &nbits
, 0));
2929 stabs_general_complaint ("bad structure-type format");
2932 FIELD_BITSIZE (fip
->list
->field
) = read_huge_number (pp
, ';', &nbits
, 0);
2935 stabs_general_complaint ("bad structure-type format");
2940 if (FIELD_BITPOS (fip
->list
->field
) == 0
2941 && FIELD_BITSIZE (fip
->list
->field
) == 0)
2943 /* This can happen in two cases: (1) at least for gcc 2.4.5 or so,
2944 it is a field which has been optimized out. The correct stab for
2945 this case is to use VISIBILITY_IGNORE, but that is a recent
2946 invention. (2) It is a 0-size array. For example
2947 union { int num; char str[0]; } foo. Printing _("<no value>" for
2948 str in "p foo" is OK, since foo.str (and thus foo.str[3])
2949 will continue to work, and a 0-size array as a whole doesn't
2950 have any contents to print.
2952 I suspect this probably could also happen with gcc -gstabs (not
2953 -gstabs+) for static fields, and perhaps other C++ extensions.
2954 Hopefully few people use -gstabs with gdb, since it is intended
2955 for dbx compatibility. */
2957 /* Ignore this field. */
2958 fip
->list
->visibility
= VISIBILITY_IGNORE
;
2962 /* Detect an unpacked field and mark it as such.
2963 dbx gives a bit size for all fields.
2964 Note that forward refs cannot be packed,
2965 and treat enums as if they had the width of ints. */
2967 struct type
*field_type
= check_typedef (FIELD_TYPE (fip
->list
->field
));
2969 if (TYPE_CODE (field_type
) != TYPE_CODE_INT
2970 && TYPE_CODE (field_type
) != TYPE_CODE_RANGE
2971 && TYPE_CODE (field_type
) != TYPE_CODE_BOOL
2972 && TYPE_CODE (field_type
) != TYPE_CODE_ENUM
)
2974 FIELD_BITSIZE (fip
->list
->field
) = 0;
2976 if ((FIELD_BITSIZE (fip
->list
->field
)
2977 == TARGET_CHAR_BIT
* TYPE_LENGTH (field_type
)
2978 || (TYPE_CODE (field_type
) == TYPE_CODE_ENUM
2979 && FIELD_BITSIZE (fip
->list
->field
)
2980 == gdbarch_int_bit (gdbarch
))
2983 FIELD_BITPOS (fip
->list
->field
) % 8 == 0)
2985 FIELD_BITSIZE (fip
->list
->field
) = 0;
2991 /* Read struct or class data fields. They have the form:
2993 NAME : [VISIBILITY] TYPENUM , BITPOS , BITSIZE ;
2995 At the end, we see a semicolon instead of a field.
2997 In C++, this may wind up being NAME:?TYPENUM:PHYSNAME; for
3000 The optional VISIBILITY is one of:
3002 '/0' (VISIBILITY_PRIVATE)
3003 '/1' (VISIBILITY_PROTECTED)
3004 '/2' (VISIBILITY_PUBLIC)
3005 '/9' (VISIBILITY_IGNORE)
3007 or nothing, for C style fields with public visibility.
3009 Returns 1 for success, 0 for failure. */
3012 read_struct_fields (struct field_info
*fip
, char **pp
, struct type
*type
,
3013 struct objfile
*objfile
)
3016 struct nextfield
*newobj
;
3018 /* We better set p right now, in case there are no fields at all... */
3022 /* Read each data member type until we find the terminating ';' at the end of
3023 the data member list, or break for some other reason such as finding the
3024 start of the member function list. */
3025 /* Stab string for structure/union does not end with two ';' in
3026 SUN C compiler 5.3 i.e. F6U2, hence check for end of string. */
3028 while (**pp
!= ';' && **pp
!= '\0')
3030 STABS_CONTINUE (pp
, objfile
);
3031 /* Get space to record the next field's data. */
3032 newobj
= XCNEW (struct nextfield
);
3033 make_cleanup (xfree
, newobj
);
3035 newobj
->next
= fip
->list
;
3038 /* Get the field name. */
3041 /* If is starts with CPLUS_MARKER it is a special abbreviation,
3042 unless the CPLUS_MARKER is followed by an underscore, in
3043 which case it is just the name of an anonymous type, which we
3044 should handle like any other type name. */
3046 if (is_cplus_marker (p
[0]) && p
[1] != '_')
3048 if (!read_cpp_abbrev (fip
, pp
, type
, objfile
))
3053 /* Look for the ':' that separates the field name from the field
3054 values. Data members are delimited by a single ':', while member
3055 functions are delimited by a pair of ':'s. When we hit the member
3056 functions (if any), terminate scan loop and return. */
3058 while (*p
!= ':' && *p
!= '\0')
3065 /* Check to see if we have hit the member functions yet. */
3070 read_one_struct_field (fip
, pp
, p
, type
, objfile
);
3072 if (p
[0] == ':' && p
[1] == ':')
3074 /* (the deleted) chill the list of fields: the last entry (at
3075 the head) is a partially constructed entry which we now
3077 fip
->list
= fip
->list
->next
;
3082 /* The stabs for C++ derived classes contain baseclass information which
3083 is marked by a '!' character after the total size. This function is
3084 called when we encounter the baseclass marker, and slurps up all the
3085 baseclass information.
3087 Immediately following the '!' marker is the number of base classes that
3088 the class is derived from, followed by information for each base class.
3089 For each base class, there are two visibility specifiers, a bit offset
3090 to the base class information within the derived class, a reference to
3091 the type for the base class, and a terminating semicolon.
3093 A typical example, with two base classes, would be "!2,020,19;0264,21;".
3095 Baseclass information marker __________________|| | | | | | |
3096 Number of baseclasses __________________________| | | | | | |
3097 Visibility specifiers (2) ________________________| | | | | |
3098 Offset in bits from start of class _________________| | | | |
3099 Type number for base class ___________________________| | | |
3100 Visibility specifiers (2) _______________________________| | |
3101 Offset in bits from start of class ________________________| |
3102 Type number of base class ____________________________________|
3104 Return 1 for success, 0 for (error-type-inducing) failure. */
3110 read_baseclasses (struct field_info
*fip
, char **pp
, struct type
*type
,
3111 struct objfile
*objfile
)
3114 struct nextfield
*newobj
;
3122 /* Skip the '!' baseclass information marker. */
3126 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
3130 TYPE_N_BASECLASSES (type
) = read_huge_number (pp
, ',', &nbits
, 0);
3136 /* Some stupid compilers have trouble with the following, so break
3137 it up into simpler expressions. */
3138 TYPE_FIELD_VIRTUAL_BITS (type
) = (B_TYPE
*)
3139 TYPE_ALLOC (type
, B_BYTES (TYPE_N_BASECLASSES (type
)));
3142 int num_bytes
= B_BYTES (TYPE_N_BASECLASSES (type
));
3145 pointer
= (char *) TYPE_ALLOC (type
, num_bytes
);
3146 TYPE_FIELD_VIRTUAL_BITS (type
) = (B_TYPE
*) pointer
;
3150 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type
), TYPE_N_BASECLASSES (type
));
3152 for (i
= 0; i
< TYPE_N_BASECLASSES (type
); i
++)
3154 newobj
= XCNEW (struct nextfield
);
3155 make_cleanup (xfree
, newobj
);
3157 newobj
->next
= fip
->list
;
3159 FIELD_BITSIZE (newobj
->field
) = 0; /* This should be an unpacked
3162 STABS_CONTINUE (pp
, objfile
);
3166 /* Nothing to do. */
3169 SET_TYPE_FIELD_VIRTUAL (type
, i
);
3172 /* Unknown character. Complain and treat it as non-virtual. */
3174 complaint (&symfile_complaints
,
3175 _("Unknown virtual character `%c' for baseclass"),
3181 newobj
->visibility
= *(*pp
)++;
3182 switch (newobj
->visibility
)
3184 case VISIBILITY_PRIVATE
:
3185 case VISIBILITY_PROTECTED
:
3186 case VISIBILITY_PUBLIC
:
3189 /* Bad visibility format. Complain and treat it as
3192 complaint (&symfile_complaints
,
3193 _("Unknown visibility `%c' for baseclass"),
3194 newobj
->visibility
);
3195 newobj
->visibility
= VISIBILITY_PUBLIC
;
3202 /* The remaining value is the bit offset of the portion of the object
3203 corresponding to this baseclass. Always zero in the absence of
3204 multiple inheritance. */
3206 SET_FIELD_BITPOS (newobj
->field
, read_huge_number (pp
, ',', &nbits
, 0));
3211 /* The last piece of baseclass information is the type of the
3212 base class. Read it, and remember it's type name as this
3215 newobj
->field
.type
= read_type (pp
, objfile
);
3216 newobj
->field
.name
= type_name_no_tag (newobj
->field
.type
);
3218 /* Skip trailing ';' and bump count of number of fields seen. */
3227 /* The tail end of stabs for C++ classes that contain a virtual function
3228 pointer contains a tilde, a %, and a type number.
3229 The type number refers to the base class (possibly this class itself) which
3230 contains the vtable pointer for the current class.
3232 This function is called when we have parsed all the method declarations,
3233 so we can look for the vptr base class info. */
3236 read_tilde_fields (struct field_info
*fip
, char **pp
, struct type
*type
,
3237 struct objfile
*objfile
)
3241 STABS_CONTINUE (pp
, objfile
);
3243 /* If we are positioned at a ';', then skip it. */
3253 if (**pp
== '=' || **pp
== '+' || **pp
== '-')
3255 /* Obsolete flags that used to indicate the presence
3256 of constructors and/or destructors. */
3260 /* Read either a '%' or the final ';'. */
3261 if (*(*pp
)++ == '%')
3263 /* The next number is the type number of the base class
3264 (possibly our own class) which supplies the vtable for
3265 this class. Parse it out, and search that class to find
3266 its vtable pointer, and install those into TYPE_VPTR_BASETYPE
3267 and TYPE_VPTR_FIELDNO. */
3272 t
= read_type (pp
, objfile
);
3274 while (*p
!= '\0' && *p
!= ';')
3280 /* Premature end of symbol. */
3284 set_type_vptr_basetype (type
, t
);
3285 if (type
== t
) /* Our own class provides vtbl ptr. */
3287 for (i
= TYPE_NFIELDS (t
) - 1;
3288 i
>= TYPE_N_BASECLASSES (t
);
3291 const char *name
= TYPE_FIELD_NAME (t
, i
);
3293 if (!strncmp (name
, vptr_name
, sizeof (vptr_name
) - 2)
3294 && is_cplus_marker (name
[sizeof (vptr_name
) - 2]))
3296 set_type_vptr_fieldno (type
, i
);
3300 /* Virtual function table field not found. */
3301 complaint (&symfile_complaints
,
3302 _("virtual function table pointer "
3303 "not found when defining class `%s'"),
3309 set_type_vptr_fieldno (type
, TYPE_VPTR_FIELDNO (t
));
3320 attach_fn_fields_to_type (struct field_info
*fip
, struct type
*type
)
3324 for (n
= TYPE_NFN_FIELDS (type
);
3325 fip
->fnlist
!= NULL
;
3326 fip
->fnlist
= fip
->fnlist
->next
)
3328 --n
; /* Circumvent Sun3 compiler bug. */
3329 TYPE_FN_FIELDLISTS (type
)[n
] = fip
->fnlist
->fn_fieldlist
;
3334 /* Create the vector of fields, and record how big it is.
3335 We need this info to record proper virtual function table information
3336 for this class's virtual functions. */
3339 attach_fields_to_type (struct field_info
*fip
, struct type
*type
,
3340 struct objfile
*objfile
)
3343 int non_public_fields
= 0;
3344 struct nextfield
*scan
;
3346 /* Count up the number of fields that we have, as well as taking note of
3347 whether or not there are any non-public fields, which requires us to
3348 allocate and build the private_field_bits and protected_field_bits
3351 for (scan
= fip
->list
; scan
!= NULL
; scan
= scan
->next
)
3354 if (scan
->visibility
!= VISIBILITY_PUBLIC
)
3356 non_public_fields
++;
3360 /* Now we know how many fields there are, and whether or not there are any
3361 non-public fields. Record the field count, allocate space for the
3362 array of fields, and create blank visibility bitfields if necessary. */
3364 TYPE_NFIELDS (type
) = nfields
;
3365 TYPE_FIELDS (type
) = (struct field
*)
3366 TYPE_ALLOC (type
, sizeof (struct field
) * nfields
);
3367 memset (TYPE_FIELDS (type
), 0, sizeof (struct field
) * nfields
);
3369 if (non_public_fields
)
3371 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
3373 TYPE_FIELD_PRIVATE_BITS (type
) =
3374 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
3375 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type
), nfields
);
3377 TYPE_FIELD_PROTECTED_BITS (type
) =
3378 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
3379 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type
), nfields
);
3381 TYPE_FIELD_IGNORE_BITS (type
) =
3382 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
3383 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type
), nfields
);
3386 /* Copy the saved-up fields into the field vector. Start from the
3387 head of the list, adding to the tail of the field array, so that
3388 they end up in the same order in the array in which they were
3389 added to the list. */
3391 while (nfields
-- > 0)
3393 TYPE_FIELD (type
, nfields
) = fip
->list
->field
;
3394 switch (fip
->list
->visibility
)
3396 case VISIBILITY_PRIVATE
:
3397 SET_TYPE_FIELD_PRIVATE (type
, nfields
);
3400 case VISIBILITY_PROTECTED
:
3401 SET_TYPE_FIELD_PROTECTED (type
, nfields
);
3404 case VISIBILITY_IGNORE
:
3405 SET_TYPE_FIELD_IGNORE (type
, nfields
);
3408 case VISIBILITY_PUBLIC
:
3412 /* Unknown visibility. Complain and treat it as public. */
3414 complaint (&symfile_complaints
,
3415 _("Unknown visibility `%c' for field"),
3416 fip
->list
->visibility
);
3420 fip
->list
= fip
->list
->next
;
3426 /* Complain that the compiler has emitted more than one definition for the
3427 structure type TYPE. */
3429 complain_about_struct_wipeout (struct type
*type
)
3431 const char *name
= "";
3432 const char *kind
= "";
3434 if (TYPE_TAG_NAME (type
))
3436 name
= TYPE_TAG_NAME (type
);
3437 switch (TYPE_CODE (type
))
3439 case TYPE_CODE_STRUCT
: kind
= "struct "; break;
3440 case TYPE_CODE_UNION
: kind
= "union "; break;
3441 case TYPE_CODE_ENUM
: kind
= "enum "; break;
3445 else if (TYPE_NAME (type
))
3447 name
= TYPE_NAME (type
);
3456 complaint (&symfile_complaints
,
3457 _("struct/union type gets multiply defined: %s%s"), kind
, name
);
3460 /* Set the length for all variants of a same main_type, which are
3461 connected in the closed chain.
3463 This is something that needs to be done when a type is defined *after*
3464 some cross references to this type have already been read. Consider
3465 for instance the following scenario where we have the following two
3468 .stabs "t:p(0,21)=*(0,22)=k(0,23)=xsdummy:",160,0,28,-24
3469 .stabs "dummy:T(0,23)=s16x:(0,1),0,3[...]"
3471 A stubbed version of type dummy is created while processing the first
3472 stabs entry. The length of that type is initially set to zero, since
3473 it is unknown at this point. Also, a "constant" variation of type
3474 "dummy" is created as well (this is the "(0,22)=k(0,23)" section of
3477 The second stabs entry allows us to replace the stubbed definition
3478 with the real definition. However, we still need to adjust the length
3479 of the "constant" variation of that type, as its length was left
3480 untouched during the main type replacement... */
3483 set_length_in_type_chain (struct type
*type
)
3485 struct type
*ntype
= TYPE_CHAIN (type
);
3487 while (ntype
!= type
)
3489 if (TYPE_LENGTH(ntype
) == 0)
3490 TYPE_LENGTH (ntype
) = TYPE_LENGTH (type
);
3492 complain_about_struct_wipeout (ntype
);
3493 ntype
= TYPE_CHAIN (ntype
);
3497 /* Read the description of a structure (or union type) and return an object
3498 describing the type.
3500 PP points to a character pointer that points to the next unconsumed token
3501 in the stabs string. For example, given stabs "A:T4=s4a:1,0,32;;",
3502 *PP will point to "4a:1,0,32;;".
3504 TYPE points to an incomplete type that needs to be filled in.
3506 OBJFILE points to the current objfile from which the stabs information is
3507 being read. (Note that it is redundant in that TYPE also contains a pointer
3508 to this same objfile, so it might be a good idea to eliminate it. FIXME).
3511 static struct type
*
3512 read_struct_type (char **pp
, struct type
*type
, enum type_code type_code
,
3513 struct objfile
*objfile
)
3515 struct cleanup
*back_to
;
3516 struct field_info fi
;
3521 /* When describing struct/union/class types in stabs, G++ always drops
3522 all qualifications from the name. So if you've got:
3523 struct A { ... struct B { ... }; ... };
3524 then G++ will emit stabs for `struct A::B' that call it simply
3525 `struct B'. Obviously, if you've got a real top-level definition for
3526 `struct B', or other nested definitions, this is going to cause
3529 Obviously, GDB can't fix this by itself, but it can at least avoid
3530 scribbling on existing structure type objects when new definitions
3532 if (! (TYPE_CODE (type
) == TYPE_CODE_UNDEF
3533 || TYPE_STUB (type
)))
3535 complain_about_struct_wipeout (type
);
3537 /* It's probably best to return the type unchanged. */
3541 back_to
= make_cleanup (null_cleanup
, 0);
3543 INIT_CPLUS_SPECIFIC (type
);
3544 TYPE_CODE (type
) = type_code
;
3545 TYPE_STUB (type
) = 0;
3547 /* First comes the total size in bytes. */
3552 TYPE_LENGTH (type
) = read_huge_number (pp
, 0, &nbits
, 0);
3555 do_cleanups (back_to
);
3556 return error_type (pp
, objfile
);
3558 set_length_in_type_chain (type
);
3561 /* Now read the baseclasses, if any, read the regular C struct or C++
3562 class member fields, attach the fields to the type, read the C++
3563 member functions, attach them to the type, and then read any tilde
3564 field (baseclass specifier for the class holding the main vtable). */
3566 if (!read_baseclasses (&fi
, pp
, type
, objfile
)
3567 || !read_struct_fields (&fi
, pp
, type
, objfile
)
3568 || !attach_fields_to_type (&fi
, type
, objfile
)
3569 || !read_member_functions (&fi
, pp
, type
, objfile
)
3570 || !attach_fn_fields_to_type (&fi
, type
)
3571 || !read_tilde_fields (&fi
, pp
, type
, objfile
))
3573 type
= error_type (pp
, objfile
);
3576 do_cleanups (back_to
);
3580 /* Read a definition of an array type,
3581 and create and return a suitable type object.
3582 Also creates a range type which represents the bounds of that
3585 static struct type
*
3586 read_array_type (char **pp
, struct type
*type
,
3587 struct objfile
*objfile
)
3589 struct type
*index_type
, *element_type
, *range_type
;
3594 /* Format of an array type:
3595 "ar<index type>;lower;upper;<array_contents_type>".
3596 OS9000: "arlower,upper;<array_contents_type>".
3598 Fortran adjustable arrays use Adigits or Tdigits for lower or upper;
3599 for these, produce a type like float[][]. */
3602 index_type
= read_type (pp
, objfile
);
3604 /* Improper format of array type decl. */
3605 return error_type (pp
, objfile
);
3609 if (!(**pp
>= '0' && **pp
<= '9') && **pp
!= '-')
3614 lower
= read_huge_number (pp
, ';', &nbits
, 0);
3617 return error_type (pp
, objfile
);
3619 if (!(**pp
>= '0' && **pp
<= '9') && **pp
!= '-')
3624 upper
= read_huge_number (pp
, ';', &nbits
, 0);
3626 return error_type (pp
, objfile
);
3628 element_type
= read_type (pp
, objfile
);
3637 create_static_range_type ((struct type
*) NULL
, index_type
, lower
, upper
);
3638 type
= create_array_type (type
, element_type
, range_type
);
3644 /* Read a definition of an enumeration type,
3645 and create and return a suitable type object.
3646 Also defines the symbols that represent the values of the type. */
3648 static struct type
*
3649 read_enum_type (char **pp
, struct type
*type
,
3650 struct objfile
*objfile
)
3652 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
3658 struct pending
**symlist
;
3659 struct pending
*osyms
, *syms
;
3662 int unsigned_enum
= 1;
3665 /* FIXME! The stabs produced by Sun CC merrily define things that ought
3666 to be file-scope, between N_FN entries, using N_LSYM. What's a mother
3667 to do? For now, force all enum values to file scope. */
3668 if (within_function
)
3669 symlist
= &local_symbols
;
3672 symlist
= &file_symbols
;
3674 o_nsyms
= osyms
? osyms
->nsyms
: 0;
3676 /* The aix4 compiler emits an extra field before the enum members;
3677 my guess is it's a type of some sort. Just ignore it. */
3680 /* Skip over the type. */
3684 /* Skip over the colon. */
3688 /* Read the value-names and their values.
3689 The input syntax is NAME:VALUE,NAME:VALUE, and so on.
3690 A semicolon or comma instead of a NAME means the end. */
3691 while (**pp
&& **pp
!= ';' && **pp
!= ',')
3693 STABS_CONTINUE (pp
, objfile
);
3697 name
= (char *) obstack_copy0 (&objfile
->objfile_obstack
, *pp
, p
- *pp
);
3699 n
= read_huge_number (pp
, ',', &nbits
, 0);
3701 return error_type (pp
, objfile
);
3703 sym
= allocate_symbol (objfile
);
3704 SYMBOL_SET_LINKAGE_NAME (sym
, name
);
3705 SYMBOL_SET_LANGUAGE (sym
, current_subfile
->language
,
3706 &objfile
->objfile_obstack
);
3707 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST
;
3708 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
3709 SYMBOL_VALUE (sym
) = n
;
3712 add_symbol_to_list (sym
, symlist
);
3717 (*pp
)++; /* Skip the semicolon. */
3719 /* Now fill in the fields of the type-structure. */
3721 TYPE_LENGTH (type
) = gdbarch_int_bit (gdbarch
) / HOST_CHAR_BIT
;
3722 set_length_in_type_chain (type
);
3723 TYPE_CODE (type
) = TYPE_CODE_ENUM
;
3724 TYPE_STUB (type
) = 0;
3726 TYPE_UNSIGNED (type
) = 1;
3727 TYPE_NFIELDS (type
) = nsyms
;
3728 TYPE_FIELDS (type
) = (struct field
*)
3729 TYPE_ALLOC (type
, sizeof (struct field
) * nsyms
);
3730 memset (TYPE_FIELDS (type
), 0, sizeof (struct field
) * nsyms
);
3732 /* Find the symbols for the values and put them into the type.
3733 The symbols can be found in the symlist that we put them on
3734 to cause them to be defined. osyms contains the old value
3735 of that symlist; everything up to there was defined by us. */
3736 /* Note that we preserve the order of the enum constants, so
3737 that in something like "enum {FOO, LAST_THING=FOO}" we print
3738 FOO, not LAST_THING. */
3740 for (syms
= *symlist
, n
= nsyms
- 1; syms
; syms
= syms
->next
)
3742 int last
= syms
== osyms
? o_nsyms
: 0;
3743 int j
= syms
->nsyms
;
3745 for (; --j
>= last
; --n
)
3747 struct symbol
*xsym
= syms
->symbol
[j
];
3749 SYMBOL_TYPE (xsym
) = type
;
3750 TYPE_FIELD_NAME (type
, n
) = SYMBOL_LINKAGE_NAME (xsym
);
3751 SET_FIELD_ENUMVAL (TYPE_FIELD (type
, n
), SYMBOL_VALUE (xsym
));
3752 TYPE_FIELD_BITSIZE (type
, n
) = 0;
3761 /* Sun's ACC uses a somewhat saner method for specifying the builtin
3762 typedefs in every file (for int, long, etc):
3764 type = b <signed> <width> <format type>; <offset>; <nbits>
3766 optional format type = c or b for char or boolean.
3767 offset = offset from high order bit to start bit of type.
3768 width is # bytes in object of this type, nbits is # bits in type.
3770 The width/offset stuff appears to be for small objects stored in
3771 larger ones (e.g. `shorts' in `int' registers). We ignore it for now,
3774 static struct type
*
3775 read_sun_builtin_type (char **pp
, int typenums
[2], struct objfile
*objfile
)
3780 int boolean_type
= 0;
3791 return error_type (pp
, objfile
);
3795 /* For some odd reason, all forms of char put a c here. This is strange
3796 because no other type has this honor. We can safely ignore this because
3797 we actually determine 'char'acterness by the number of bits specified in
3799 Boolean forms, e.g Fortran logical*X, put a b here. */
3803 else if (**pp
== 'b')
3809 /* The first number appears to be the number of bytes occupied
3810 by this type, except that unsigned short is 4 instead of 2.
3811 Since this information is redundant with the third number,
3812 we will ignore it. */
3813 read_huge_number (pp
, ';', &nbits
, 0);
3815 return error_type (pp
, objfile
);
3817 /* The second number is always 0, so ignore it too. */
3818 read_huge_number (pp
, ';', &nbits
, 0);
3820 return error_type (pp
, objfile
);
3822 /* The third number is the number of bits for this type. */
3823 type_bits
= read_huge_number (pp
, 0, &nbits
, 0);
3825 return error_type (pp
, objfile
);
3826 /* The type *should* end with a semicolon. If it are embedded
3827 in a larger type the semicolon may be the only way to know where
3828 the type ends. If this type is at the end of the stabstring we
3829 can deal with the omitted semicolon (but we don't have to like
3830 it). Don't bother to complain(), Sun's compiler omits the semicolon
3837 struct type
*type
= init_type (objfile
, TYPE_CODE_VOID
, 1, NULL
);
3839 TYPE_UNSIGNED (type
) = 1;
3844 return init_boolean_type (objfile
, type_bits
, unsigned_type
, NULL
);
3846 return init_integer_type (objfile
, type_bits
, unsigned_type
, NULL
);
3849 static struct type
*
3850 read_sun_floating_type (char **pp
, int typenums
[2], struct objfile
*objfile
)
3855 struct type
*rettype
;
3857 /* The first number has more details about the type, for example
3859 details
= read_huge_number (pp
, ';', &nbits
, 0);
3861 return error_type (pp
, objfile
);
3863 /* The second number is the number of bytes occupied by this type. */
3864 nbytes
= read_huge_number (pp
, ';', &nbits
, 0);
3866 return error_type (pp
, objfile
);
3868 nbits
= nbytes
* TARGET_CHAR_BIT
;
3870 if (details
== NF_COMPLEX
|| details
== NF_COMPLEX16
3871 || details
== NF_COMPLEX32
)
3873 rettype
= dbx_init_float_type (objfile
, nbits
/ 2);
3874 return init_complex_type (objfile
, NULL
, rettype
);
3877 return dbx_init_float_type (objfile
, nbits
);
3880 /* Read a number from the string pointed to by *PP.
3881 The value of *PP is advanced over the number.
3882 If END is nonzero, the character that ends the
3883 number must match END, or an error happens;
3884 and that character is skipped if it does match.
3885 If END is zero, *PP is left pointing to that character.
3887 If TWOS_COMPLEMENT_BITS is set to a strictly positive value and if
3888 the number is represented in an octal representation, assume that
3889 it is represented in a 2's complement representation with a size of
3890 TWOS_COMPLEMENT_BITS.
3892 If the number fits in a long, set *BITS to 0 and return the value.
3893 If not, set *BITS to be the number of bits in the number and return 0.
3895 If encounter garbage, set *BITS to -1 and return 0. */
3898 read_huge_number (char **pp
, int end
, int *bits
, int twos_complement_bits
)
3909 int twos_complement_representation
= 0;
3917 /* Leading zero means octal. GCC uses this to output values larger
3918 than an int (because that would be hard in decimal). */
3925 /* Skip extra zeros. */
3929 if (sign
> 0 && radix
== 8 && twos_complement_bits
> 0)
3931 /* Octal, possibly signed. Check if we have enough chars for a
3937 while ((c
= *p1
) >= '0' && c
< '8')
3941 if (len
> twos_complement_bits
/ 3
3942 || (twos_complement_bits
% 3 == 0
3943 && len
== twos_complement_bits
/ 3))
3945 /* Ok, we have enough characters for a signed value, check
3946 for signness by testing if the sign bit is set. */
3947 sign_bit
= (twos_complement_bits
% 3 + 2) % 3;
3949 if (c
& (1 << sign_bit
))
3951 /* Definitely signed. */
3952 twos_complement_representation
= 1;
3958 upper_limit
= LONG_MAX
/ radix
;
3960 while ((c
= *p
++) >= '0' && c
< ('0' + radix
))
3962 if (n
<= upper_limit
)
3964 if (twos_complement_representation
)
3966 /* Octal, signed, twos complement representation. In
3967 this case, n is the corresponding absolute value. */
3970 long sn
= c
- '0' - ((2 * (c
- '0')) | (2 << sign_bit
));
3982 /* unsigned representation */
3984 n
+= c
- '0'; /* FIXME this overflows anyway. */
3990 /* This depends on large values being output in octal, which is
3997 /* Ignore leading zeroes. */
4001 else if (c
== '2' || c
== '3')
4022 if (radix
== 8 && twos_complement_bits
> 0 && nbits
> twos_complement_bits
)
4024 /* We were supposed to parse a number with maximum
4025 TWOS_COMPLEMENT_BITS bits, but something went wrong. */
4036 /* Large decimal constants are an error (because it is hard to
4037 count how many bits are in them). */
4043 /* -0x7f is the same as 0x80. So deal with it by adding one to
4044 the number of bits. Two's complement represention octals
4045 can't have a '-' in front. */
4046 if (sign
== -1 && !twos_complement_representation
)
4057 /* It's *BITS which has the interesting information. */
4061 static struct type
*
4062 read_range_type (char **pp
, int typenums
[2], int type_size
,
4063 struct objfile
*objfile
)
4065 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
4066 char *orig_pp
= *pp
;
4071 struct type
*result_type
;
4072 struct type
*index_type
= NULL
;
4074 /* First comes a type we are a subrange of.
4075 In C it is usually 0, 1 or the type being defined. */
4076 if (read_type_number (pp
, rangenums
) != 0)
4077 return error_type (pp
, objfile
);
4078 self_subrange
= (rangenums
[0] == typenums
[0] &&
4079 rangenums
[1] == typenums
[1]);
4084 index_type
= read_type (pp
, objfile
);
4087 /* A semicolon should now follow; skip it. */
4091 /* The remaining two operands are usually lower and upper bounds
4092 of the range. But in some special cases they mean something else. */
4093 n2
= read_huge_number (pp
, ';', &n2bits
, type_size
);
4094 n3
= read_huge_number (pp
, ';', &n3bits
, type_size
);
4096 if (n2bits
== -1 || n3bits
== -1)
4097 return error_type (pp
, objfile
);
4100 goto handle_true_range
;
4102 /* If limits are huge, must be large integral type. */
4103 if (n2bits
!= 0 || n3bits
!= 0)
4105 char got_signed
= 0;
4106 char got_unsigned
= 0;
4107 /* Number of bits in the type. */
4110 /* If a type size attribute has been specified, the bounds of
4111 the range should fit in this size. If the lower bounds needs
4112 more bits than the upper bound, then the type is signed. */
4113 if (n2bits
<= type_size
&& n3bits
<= type_size
)
4115 if (n2bits
== type_size
&& n2bits
> n3bits
)
4121 /* Range from 0 to <large number> is an unsigned large integral type. */
4122 else if ((n2bits
== 0 && n2
== 0) && n3bits
!= 0)
4127 /* Range from <large number> to <large number>-1 is a large signed
4128 integral type. Take care of the case where <large number> doesn't
4129 fit in a long but <large number>-1 does. */
4130 else if ((n2bits
!= 0 && n3bits
!= 0 && n2bits
== n3bits
+ 1)
4131 || (n2bits
!= 0 && n3bits
== 0
4132 && (n2bits
== sizeof (long) * HOST_CHAR_BIT
)
4139 if (got_signed
|| got_unsigned
)
4140 return init_integer_type (objfile
, nbits
, got_unsigned
, NULL
);
4142 return error_type (pp
, objfile
);
4145 /* A type defined as a subrange of itself, with bounds both 0, is void. */
4146 if (self_subrange
&& n2
== 0 && n3
== 0)
4147 return init_type (objfile
, TYPE_CODE_VOID
, 1, NULL
);
4149 /* If n3 is zero and n2 is positive, we want a floating type, and n2
4150 is the width in bytes.
4152 Fortran programs appear to use this for complex types also. To
4153 distinguish between floats and complex, g77 (and others?) seem
4154 to use self-subranges for the complexes, and subranges of int for
4157 Also note that for complexes, g77 sets n2 to the size of one of
4158 the member floats, not the whole complex beast. My guess is that
4159 this was to work well with pre-COMPLEX versions of gdb. */
4161 if (n3
== 0 && n2
> 0)
4163 struct type
*float_type
4164 = dbx_init_float_type (objfile
, n2
* TARGET_CHAR_BIT
);
4167 return init_complex_type (objfile
, NULL
, float_type
);
4172 /* If the upper bound is -1, it must really be an unsigned integral. */
4174 else if (n2
== 0 && n3
== -1)
4176 int bits
= type_size
;
4180 /* We don't know its size. It is unsigned int or unsigned
4181 long. GCC 2.3.3 uses this for long long too, but that is
4182 just a GDB 3.5 compatibility hack. */
4183 bits
= gdbarch_int_bit (gdbarch
);
4186 return init_integer_type (objfile
, bits
, 1, NULL
);
4189 /* Special case: char is defined (Who knows why) as a subrange of
4190 itself with range 0-127. */
4191 else if (self_subrange
&& n2
== 0 && n3
== 127)
4193 struct type
*type
= init_integer_type (objfile
, 1, 0, NULL
);
4194 TYPE_NOSIGN (type
) = 1;
4197 /* We used to do this only for subrange of self or subrange of int. */
4200 /* -1 is used for the upper bound of (4 byte) "unsigned int" and
4201 "unsigned long", and we already checked for that,
4202 so don't need to test for it here. */
4205 /* n3 actually gives the size. */
4206 return init_integer_type (objfile
, -n3
* TARGET_CHAR_BIT
, 1, NULL
);
4208 /* Is n3 == 2**(8n)-1 for some integer n? Then it's an
4209 unsigned n-byte integer. But do require n to be a power of
4210 two; we don't want 3- and 5-byte integers flying around. */
4216 for (bytes
= 0; (bits
& 0xff) == 0xff; bytes
++)
4219 && ((bytes
- 1) & bytes
) == 0) /* "bytes is a power of two" */
4220 return init_integer_type (objfile
, bytes
* TARGET_CHAR_BIT
, 1, NULL
);
4223 /* I think this is for Convex "long long". Since I don't know whether
4224 Convex sets self_subrange, I also accept that particular size regardless
4225 of self_subrange. */
4226 else if (n3
== 0 && n2
< 0
4228 || n2
== -gdbarch_long_long_bit
4229 (gdbarch
) / TARGET_CHAR_BIT
))
4230 return init_integer_type (objfile
, -n2
* TARGET_CHAR_BIT
, 0, NULL
);
4231 else if (n2
== -n3
- 1)
4234 return init_integer_type (objfile
, 8, 0, NULL
);
4236 return init_integer_type (objfile
, 16, 0, NULL
);
4237 if (n3
== 0x7fffffff)
4238 return init_integer_type (objfile
, 32, 0, NULL
);
4241 /* We have a real range type on our hands. Allocate space and
4242 return a real pointer. */
4246 index_type
= objfile_type (objfile
)->builtin_int
;
4248 index_type
= *dbx_lookup_type (rangenums
, objfile
);
4249 if (index_type
== NULL
)
4251 /* Does this actually ever happen? Is that why we are worrying
4252 about dealing with it rather than just calling error_type? */
4254 complaint (&symfile_complaints
,
4255 _("base type %d of range type is not defined"), rangenums
[1]);
4257 index_type
= objfile_type (objfile
)->builtin_int
;
4261 = create_static_range_type ((struct type
*) NULL
, index_type
, n2
, n3
);
4262 return (result_type
);
4265 /* Read in an argument list. This is a list of types, separated by commas
4266 and terminated with END. Return the list of types read in, or NULL
4267 if there is an error. */
4269 static struct field
*
4270 read_args (char **pp
, int end
, struct objfile
*objfile
, int *nargsp
,
4273 /* FIXME! Remove this arbitrary limit! */
4274 struct type
*types
[1024]; /* Allow for fns of 1023 parameters. */
4281 /* Invalid argument list: no ','. */
4284 STABS_CONTINUE (pp
, objfile
);
4285 types
[n
++] = read_type (pp
, objfile
);
4287 (*pp
)++; /* get past `end' (the ':' character). */
4291 /* We should read at least the THIS parameter here. Some broken stabs
4292 output contained `(0,41),(0,42)=@s8;-16;,(0,43),(0,1);' where should
4293 have been present ";-16,(0,43)" reference instead. This way the
4294 excessive ";" marker prematurely stops the parameters parsing. */
4296 complaint (&symfile_complaints
, _("Invalid (empty) method arguments"));
4299 else if (TYPE_CODE (types
[n
- 1]) != TYPE_CODE_VOID
)
4307 rval
= XCNEWVEC (struct field
, n
);
4308 for (i
= 0; i
< n
; i
++)
4309 rval
[i
].type
= types
[i
];
4314 /* Common block handling. */
4316 /* List of symbols declared since the last BCOMM. This list is a tail
4317 of local_symbols. When ECOMM is seen, the symbols on the list
4318 are noted so their proper addresses can be filled in later,
4319 using the common block base address gotten from the assembler
4322 static struct pending
*common_block
;
4323 static int common_block_i
;
4325 /* Name of the current common block. We get it from the BCOMM instead of the
4326 ECOMM to match IBM documentation (even though IBM puts the name both places
4327 like everyone else). */
4328 static char *common_block_name
;
4330 /* Process a N_BCOMM symbol. The storage for NAME is not guaranteed
4331 to remain after this function returns. */
4334 common_block_start (char *name
, struct objfile
*objfile
)
4336 if (common_block_name
!= NULL
)
4338 complaint (&symfile_complaints
,
4339 _("Invalid symbol data: common block within common block"));
4341 common_block
= local_symbols
;
4342 common_block_i
= local_symbols
? local_symbols
->nsyms
: 0;
4343 common_block_name
= (char *) obstack_copy0 (&objfile
->objfile_obstack
, name
,
4347 /* Process a N_ECOMM symbol. */
4350 common_block_end (struct objfile
*objfile
)
4352 /* Symbols declared since the BCOMM are to have the common block
4353 start address added in when we know it. common_block and
4354 common_block_i point to the first symbol after the BCOMM in
4355 the local_symbols list; copy the list and hang it off the
4356 symbol for the common block name for later fixup. */
4359 struct pending
*newobj
= 0;
4360 struct pending
*next
;
4363 if (common_block_name
== NULL
)
4365 complaint (&symfile_complaints
, _("ECOMM symbol unmatched by BCOMM"));
4369 sym
= allocate_symbol (objfile
);
4370 /* Note: common_block_name already saved on objfile_obstack. */
4371 SYMBOL_SET_LINKAGE_NAME (sym
, common_block_name
);
4372 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
4374 /* Now we copy all the symbols which have been defined since the BCOMM. */
4376 /* Copy all the struct pendings before common_block. */
4377 for (next
= local_symbols
;
4378 next
!= NULL
&& next
!= common_block
;
4381 for (j
= 0; j
< next
->nsyms
; j
++)
4382 add_symbol_to_list (next
->symbol
[j
], &newobj
);
4385 /* Copy however much of COMMON_BLOCK we need. If COMMON_BLOCK is
4386 NULL, it means copy all the local symbols (which we already did
4389 if (common_block
!= NULL
)
4390 for (j
= common_block_i
; j
< common_block
->nsyms
; j
++)
4391 add_symbol_to_list (common_block
->symbol
[j
], &newobj
);
4393 SYMBOL_TYPE (sym
) = (struct type
*) newobj
;
4395 /* Should we be putting local_symbols back to what it was?
4398 i
= hashname (SYMBOL_LINKAGE_NAME (sym
));
4399 SYMBOL_VALUE_CHAIN (sym
) = global_sym_chain
[i
];
4400 global_sym_chain
[i
] = sym
;
4401 common_block_name
= NULL
;
4404 /* Add a common block's start address to the offset of each symbol
4405 declared to be in it (by being between a BCOMM/ECOMM pair that uses
4406 the common block name). */
4409 fix_common_block (struct symbol
*sym
, CORE_ADDR valu
)
4411 struct pending
*next
= (struct pending
*) SYMBOL_TYPE (sym
);
4413 for (; next
; next
= next
->next
)
4417 for (j
= next
->nsyms
- 1; j
>= 0; j
--)
4418 SYMBOL_VALUE_ADDRESS (next
->symbol
[j
]) += valu
;
4424 /* Add {TYPE, TYPENUMS} to the NONAME_UNDEFS vector.
4425 See add_undefined_type for more details. */
4428 add_undefined_type_noname (struct type
*type
, int typenums
[2])
4432 nat
.typenums
[0] = typenums
[0];
4433 nat
.typenums
[1] = typenums
[1];
4436 if (noname_undefs_length
== noname_undefs_allocated
)
4438 noname_undefs_allocated
*= 2;
4439 noname_undefs
= (struct nat
*)
4440 xrealloc ((char *) noname_undefs
,
4441 noname_undefs_allocated
* sizeof (struct nat
));
4443 noname_undefs
[noname_undefs_length
++] = nat
;
4446 /* Add TYPE to the UNDEF_TYPES vector.
4447 See add_undefined_type for more details. */
4450 add_undefined_type_1 (struct type
*type
)
4452 if (undef_types_length
== undef_types_allocated
)
4454 undef_types_allocated
*= 2;
4455 undef_types
= (struct type
**)
4456 xrealloc ((char *) undef_types
,
4457 undef_types_allocated
* sizeof (struct type
*));
4459 undef_types
[undef_types_length
++] = type
;
4462 /* What about types defined as forward references inside of a small lexical
4464 /* Add a type to the list of undefined types to be checked through
4465 once this file has been read in.
4467 In practice, we actually maintain two such lists: The first list
4468 (UNDEF_TYPES) is used for types whose name has been provided, and
4469 concerns forward references (eg 'xs' or 'xu' forward references);
4470 the second list (NONAME_UNDEFS) is used for types whose name is
4471 unknown at creation time, because they were referenced through
4472 their type number before the actual type was declared.
4473 This function actually adds the given type to the proper list. */
4476 add_undefined_type (struct type
*type
, int typenums
[2])
4478 if (TYPE_TAG_NAME (type
) == NULL
)
4479 add_undefined_type_noname (type
, typenums
);
4481 add_undefined_type_1 (type
);
4484 /* Try to fix all undefined types pushed on the UNDEF_TYPES vector. */
4487 cleanup_undefined_types_noname (struct objfile
*objfile
)
4491 for (i
= 0; i
< noname_undefs_length
; i
++)
4493 struct nat nat
= noname_undefs
[i
];
4496 type
= dbx_lookup_type (nat
.typenums
, objfile
);
4497 if (nat
.type
!= *type
&& TYPE_CODE (*type
) != TYPE_CODE_UNDEF
)
4499 /* The instance flags of the undefined type are still unset,
4500 and needs to be copied over from the reference type.
4501 Since replace_type expects them to be identical, we need
4502 to set these flags manually before hand. */
4503 TYPE_INSTANCE_FLAGS (nat
.type
) = TYPE_INSTANCE_FLAGS (*type
);
4504 replace_type (nat
.type
, *type
);
4508 noname_undefs_length
= 0;
4511 /* Go through each undefined type, see if it's still undefined, and fix it
4512 up if possible. We have two kinds of undefined types:
4514 TYPE_CODE_ARRAY: Array whose target type wasn't defined yet.
4515 Fix: update array length using the element bounds
4516 and the target type's length.
4517 TYPE_CODE_STRUCT, TYPE_CODE_UNION: Structure whose fields were not
4518 yet defined at the time a pointer to it was made.
4519 Fix: Do a full lookup on the struct/union tag. */
4522 cleanup_undefined_types_1 (void)
4526 /* Iterate over every undefined type, and look for a symbol whose type
4527 matches our undefined type. The symbol matches if:
4528 1. It is a typedef in the STRUCT domain;
4529 2. It has the same name, and same type code;
4530 3. The instance flags are identical.
4532 It is important to check the instance flags, because we have seen
4533 examples where the debug info contained definitions such as:
4535 "foo_t:t30=B31=xefoo_t:"
4537 In this case, we have created an undefined type named "foo_t" whose
4538 instance flags is null (when processing "xefoo_t"), and then created
4539 another type with the same name, but with different instance flags
4540 ('B' means volatile). I think that the definition above is wrong,
4541 since the same type cannot be volatile and non-volatile at the same
4542 time, but we need to be able to cope with it when it happens. The
4543 approach taken here is to treat these two types as different. */
4545 for (type
= undef_types
; type
< undef_types
+ undef_types_length
; type
++)
4547 switch (TYPE_CODE (*type
))
4550 case TYPE_CODE_STRUCT
:
4551 case TYPE_CODE_UNION
:
4552 case TYPE_CODE_ENUM
:
4554 /* Check if it has been defined since. Need to do this here
4555 as well as in check_typedef to deal with the (legitimate in
4556 C though not C++) case of several types with the same name
4557 in different source files. */
4558 if (TYPE_STUB (*type
))
4560 struct pending
*ppt
;
4562 /* Name of the type, without "struct" or "union". */
4563 const char *type_name
= TYPE_TAG_NAME (*type
);
4565 if (type_name
== NULL
)
4567 complaint (&symfile_complaints
, _("need a type name"));
4570 for (ppt
= file_symbols
; ppt
; ppt
= ppt
->next
)
4572 for (i
= 0; i
< ppt
->nsyms
; i
++)
4574 struct symbol
*sym
= ppt
->symbol
[i
];
4576 if (SYMBOL_CLASS (sym
) == LOC_TYPEDEF
4577 && SYMBOL_DOMAIN (sym
) == STRUCT_DOMAIN
4578 && (TYPE_CODE (SYMBOL_TYPE (sym
)) ==
4580 && (TYPE_INSTANCE_FLAGS (*type
) ==
4581 TYPE_INSTANCE_FLAGS (SYMBOL_TYPE (sym
)))
4582 && strcmp (SYMBOL_LINKAGE_NAME (sym
),
4584 replace_type (*type
, SYMBOL_TYPE (sym
));
4593 complaint (&symfile_complaints
,
4594 _("forward-referenced types left unresolved, "
4602 undef_types_length
= 0;
4605 /* Try to fix all the undefined types we ecountered while processing
4609 cleanup_undefined_stabs_types (struct objfile
*objfile
)
4611 cleanup_undefined_types_1 ();
4612 cleanup_undefined_types_noname (objfile
);
4615 /* Scan through all of the global symbols defined in the object file,
4616 assigning values to the debugging symbols that need to be assigned
4617 to. Get these symbols from the minimal symbol table. */
4620 scan_file_globals (struct objfile
*objfile
)
4623 struct minimal_symbol
*msymbol
;
4624 struct symbol
*sym
, *prev
;
4625 struct objfile
*resolve_objfile
;
4627 /* SVR4 based linkers copy referenced global symbols from shared
4628 libraries to the main executable.
4629 If we are scanning the symbols for a shared library, try to resolve
4630 them from the minimal symbols of the main executable first. */
4632 if (symfile_objfile
&& objfile
!= symfile_objfile
)
4633 resolve_objfile
= symfile_objfile
;
4635 resolve_objfile
= objfile
;
4639 /* Avoid expensive loop through all minimal symbols if there are
4640 no unresolved symbols. */
4641 for (hash
= 0; hash
< HASHSIZE
; hash
++)
4643 if (global_sym_chain
[hash
])
4646 if (hash
>= HASHSIZE
)
4649 ALL_OBJFILE_MSYMBOLS (resolve_objfile
, msymbol
)
4653 /* Skip static symbols. */
4654 switch (MSYMBOL_TYPE (msymbol
))
4666 /* Get the hash index and check all the symbols
4667 under that hash index. */
4669 hash
= hashname (MSYMBOL_LINKAGE_NAME (msymbol
));
4671 for (sym
= global_sym_chain
[hash
]; sym
;)
4673 if (strcmp (MSYMBOL_LINKAGE_NAME (msymbol
),
4674 SYMBOL_LINKAGE_NAME (sym
)) == 0)
4676 /* Splice this symbol out of the hash chain and
4677 assign the value we have to it. */
4680 SYMBOL_VALUE_CHAIN (prev
) = SYMBOL_VALUE_CHAIN (sym
);
4684 global_sym_chain
[hash
] = SYMBOL_VALUE_CHAIN (sym
);
4687 /* Check to see whether we need to fix up a common block. */
4688 /* Note: this code might be executed several times for
4689 the same symbol if there are multiple references. */
4692 if (SYMBOL_CLASS (sym
) == LOC_BLOCK
)
4694 fix_common_block (sym
,
4695 MSYMBOL_VALUE_ADDRESS (resolve_objfile
,
4700 SYMBOL_VALUE_ADDRESS (sym
)
4701 = MSYMBOL_VALUE_ADDRESS (resolve_objfile
, msymbol
);
4703 SYMBOL_SECTION (sym
) = MSYMBOL_SECTION (msymbol
);
4708 sym
= SYMBOL_VALUE_CHAIN (prev
);
4712 sym
= global_sym_chain
[hash
];
4718 sym
= SYMBOL_VALUE_CHAIN (sym
);
4722 if (resolve_objfile
== objfile
)
4724 resolve_objfile
= objfile
;
4727 /* Change the storage class of any remaining unresolved globals to
4728 LOC_UNRESOLVED and remove them from the chain. */
4729 for (hash
= 0; hash
< HASHSIZE
; hash
++)
4731 sym
= global_sym_chain
[hash
];
4735 sym
= SYMBOL_VALUE_CHAIN (sym
);
4737 /* Change the symbol address from the misleading chain value
4739 SYMBOL_VALUE_ADDRESS (prev
) = 0;
4741 /* Complain about unresolved common block symbols. */
4742 if (SYMBOL_CLASS (prev
) == LOC_STATIC
)
4743 SYMBOL_ACLASS_INDEX (prev
) = LOC_UNRESOLVED
;
4745 complaint (&symfile_complaints
,
4746 _("%s: common block `%s' from "
4747 "global_sym_chain unresolved"),
4748 objfile_name (objfile
), SYMBOL_PRINT_NAME (prev
));
4751 memset (global_sym_chain
, 0, sizeof (global_sym_chain
));
4754 /* Initialize anything that needs initializing when starting to read
4755 a fresh piece of a symbol file, e.g. reading in the stuff corresponding
4759 stabsread_init (void)
4763 /* Initialize anything that needs initializing when a completely new
4764 symbol file is specified (not just adding some symbols from another
4765 file, e.g. a shared library). */
4768 stabsread_new_init (void)
4770 /* Empty the hash table of global syms looking for values. */
4771 memset (global_sym_chain
, 0, sizeof (global_sym_chain
));
4774 /* Initialize anything that needs initializing at the same time as
4775 start_symtab() is called. */
4780 global_stabs
= NULL
; /* AIX COFF */
4781 /* Leave FILENUM of 0 free for builtin types and this file's types. */
4782 n_this_object_header_files
= 1;
4783 type_vector_length
= 0;
4784 type_vector
= (struct type
**) 0;
4786 /* FIXME: If common_block_name is not already NULL, we should complain(). */
4787 common_block_name
= NULL
;
4790 /* Call after end_symtab(). */
4797 xfree (type_vector
);
4800 type_vector_length
= 0;
4801 previous_stab_code
= 0;
4805 finish_global_stabs (struct objfile
*objfile
)
4809 patch_block_stabs (global_symbols
, global_stabs
, objfile
);
4810 xfree (global_stabs
);
4811 global_stabs
= NULL
;
4815 /* Find the end of the name, delimited by a ':', but don't match
4816 ObjC symbols which look like -[Foo bar::]:bla. */
4818 find_name_end (char *name
)
4822 if (s
[0] == '-' || *s
== '+')
4824 /* Must be an ObjC method symbol. */
4827 error (_("invalid symbol name \"%s\""), name
);
4829 s
= strchr (s
, ']');
4832 error (_("invalid symbol name \"%s\""), name
);
4834 return strchr (s
, ':');
4838 return strchr (s
, ':');
4842 /* Initializer for this module. */
4845 _initialize_stabsread (void)
4847 rs6000_builtin_type_data
= register_objfile_data ();
4849 undef_types_allocated
= 20;
4850 undef_types_length
= 0;
4851 undef_types
= XNEWVEC (struct type
*, undef_types_allocated
);
4853 noname_undefs_allocated
= 20;
4854 noname_undefs_length
= 0;
4855 noname_undefs
= XNEWVEC (struct nat
, noname_undefs_allocated
);
4857 stab_register_index
= register_symbol_register_impl (LOC_REGISTER
,
4858 &stab_register_funcs
);
4859 stab_regparm_index
= register_symbol_register_impl (LOC_REGPARM_ADDR
,
4860 &stab_register_funcs
);