1 /* Support routines for decoding "stabs" debugging information format.
3 Copyright (C) 1986-2019 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"
39 #include "buildsym-legacy.h"
40 #include "complaints.h"
42 #include "gdb-demangle.h"
44 #include "target-float.h"
47 #include "cp-support.h"
50 #include "stabsread.h"
52 /* See stabsread.h for these globals. */
54 const char *(*next_symbol_text_func
) (struct objfile
*);
55 unsigned char processing_gcc_compilation
;
57 struct symbol
*global_sym_chain
[HASHSIZE
];
58 struct pending_stabs
*global_stabs
;
59 int previous_stab_code
;
60 int *this_object_header_files
;
61 int n_this_object_header_files
;
62 int n_allocated_this_object_header_files
;
66 struct nextfield
*next
;
68 /* This is the raw visibility from the stab. It is not checked
69 for being one of the visibilities we recognize, so code which
70 examines this field better be able to deal. */
76 struct next_fnfieldlist
78 struct next_fnfieldlist
*next
;
79 struct fn_fieldlist fn_fieldlist
;
82 /* The routines that read and process a complete stabs for a C struct or
83 C++ class pass lists of data member fields and lists of member function
84 fields in an instance of a field_info structure, as defined below.
85 This is part of some reorganization of low level C++ support and is
86 expected to eventually go away... (FIXME) */
88 struct stab_field_info
90 struct nextfield
*list
= nullptr;
91 struct next_fnfieldlist
*fnlist
= nullptr;
97 read_one_struct_field (struct stab_field_info
*, const char **, const char *,
98 struct type
*, struct objfile
*);
100 static struct type
*dbx_alloc_type (int[2], struct objfile
*);
102 static long read_huge_number (const char **, int, int *, int);
104 static struct type
*error_type (const char **, struct objfile
*);
107 patch_block_stabs (struct pending
*, struct pending_stabs
*,
110 static void fix_common_block (struct symbol
*, CORE_ADDR
);
112 static int read_type_number (const char **, int *);
114 static struct type
*read_type (const char **, struct objfile
*);
116 static struct type
*read_range_type (const char **, int[2],
117 int, struct objfile
*);
119 static struct type
*read_sun_builtin_type (const char **,
120 int[2], struct objfile
*);
122 static struct type
*read_sun_floating_type (const char **, int[2],
125 static struct type
*read_enum_type (const char **, struct type
*, struct objfile
*);
127 static struct type
*rs6000_builtin_type (int, struct objfile
*);
130 read_member_functions (struct stab_field_info
*, const char **, struct type
*,
134 read_struct_fields (struct stab_field_info
*, const char **, struct type
*,
138 read_baseclasses (struct stab_field_info
*, const char **, struct type
*,
142 read_tilde_fields (struct stab_field_info
*, const char **, struct type
*,
145 static int attach_fn_fields_to_type (struct stab_field_info
*, struct type
*);
147 static int attach_fields_to_type (struct stab_field_info
*, struct type
*,
150 static struct type
*read_struct_type (const char **, struct type
*,
154 static struct type
*read_array_type (const char **, struct type
*,
157 static struct field
*read_args (const char **, int, struct objfile
*,
160 static void add_undefined_type (struct type
*, int[2]);
163 read_cpp_abbrev (struct stab_field_info
*, const char **, struct type
*,
166 static const char *find_name_end (const char *name
);
168 static int process_reference (const char **string
);
170 void stabsread_clear_cache (void);
172 static const char vptr_name
[] = "_vptr$";
173 static const char vb_name
[] = "_vb$";
176 invalid_cpp_abbrev_complaint (const char *arg1
)
178 complaint (_("invalid C++ abbreviation `%s'"), arg1
);
182 reg_value_complaint (int regnum
, int num_regs
, const char *sym
)
184 complaint (_("bad register number %d (max %d) in symbol %s"),
185 regnum
, num_regs
- 1, sym
);
189 stabs_general_complaint (const char *arg1
)
191 complaint ("%s", arg1
);
194 /* Make a list of forward references which haven't been defined. */
196 static struct type
**undef_types
;
197 static int undef_types_allocated
;
198 static int undef_types_length
;
199 static struct symbol
*current_symbol
= NULL
;
201 /* Make a list of nameless types that are undefined.
202 This happens when another type is referenced by its number
203 before this type is actually defined. For instance "t(0,1)=k(0,2)"
204 and type (0,2) is defined only later. */
211 static struct nat
*noname_undefs
;
212 static int noname_undefs_allocated
;
213 static int noname_undefs_length
;
215 /* Check for and handle cretinous stabs symbol name continuation! */
216 #define STABS_CONTINUE(pp,objfile) \
218 if (**(pp) == '\\' || (**(pp) == '?' && (*(pp))[1] == '\0')) \
219 *(pp) = next_symbol_text (objfile); \
222 /* Vector of types defined so far, indexed by their type numbers.
223 (In newer sun systems, dbx uses a pair of numbers in parens,
224 as in "(SUBFILENUM,NUMWITHINSUBFILE)".
225 Then these numbers must be translated through the type_translations
226 hash table to get the index into the type vector.) */
228 static struct type
**type_vector
;
230 /* Number of elements allocated for type_vector currently. */
232 static int type_vector_length
;
234 /* Initial size of type vector. Is realloc'd larger if needed, and
235 realloc'd down to the size actually used, when completed. */
237 #define INITIAL_TYPE_VECTOR_LENGTH 160
240 /* Look up a dbx type-number pair. Return the address of the slot
241 where the type for that number-pair is stored.
242 The number-pair is in TYPENUMS.
244 This can be used for finding the type associated with that pair
245 or for associating a new type with the pair. */
247 static struct type
**
248 dbx_lookup_type (int typenums
[2], struct objfile
*objfile
)
250 int filenum
= typenums
[0];
251 int index
= typenums
[1];
254 struct header_file
*f
;
257 if (filenum
== -1) /* -1,-1 is for temporary types. */
260 if (filenum
< 0 || filenum
>= n_this_object_header_files
)
262 complaint (_("Invalid symbol data: type number "
263 "(%d,%d) out of range at symtab pos %d."),
264 filenum
, index
, symnum
);
272 /* Caller wants address of address of type. We think
273 that negative (rs6k builtin) types will never appear as
274 "lvalues", (nor should they), so we stuff the real type
275 pointer into a temp, and return its address. If referenced,
276 this will do the right thing. */
277 static struct type
*temp_type
;
279 temp_type
= rs6000_builtin_type (index
, objfile
);
283 /* Type is defined outside of header files.
284 Find it in this object file's type vector. */
285 if (index
>= type_vector_length
)
287 old_len
= type_vector_length
;
290 type_vector_length
= INITIAL_TYPE_VECTOR_LENGTH
;
291 type_vector
= XNEWVEC (struct type
*, type_vector_length
);
293 while (index
>= type_vector_length
)
295 type_vector_length
*= 2;
297 type_vector
= (struct type
**)
298 xrealloc ((char *) type_vector
,
299 (type_vector_length
* sizeof (struct type
*)));
300 memset (&type_vector
[old_len
], 0,
301 (type_vector_length
- old_len
) * sizeof (struct type
*));
303 return (&type_vector
[index
]);
307 real_filenum
= this_object_header_files
[filenum
];
309 if (real_filenum
>= N_HEADER_FILES (objfile
))
311 static struct type
*temp_type
;
313 warning (_("GDB internal error: bad real_filenum"));
316 temp_type
= objfile_type (objfile
)->builtin_error
;
320 f
= HEADER_FILES (objfile
) + real_filenum
;
322 f_orig_length
= f
->length
;
323 if (index
>= f_orig_length
)
325 while (index
>= f
->length
)
329 f
->vector
= (struct type
**)
330 xrealloc ((char *) f
->vector
, f
->length
* sizeof (struct type
*));
331 memset (&f
->vector
[f_orig_length
], 0,
332 (f
->length
- f_orig_length
) * sizeof (struct type
*));
334 return (&f
->vector
[index
]);
338 /* Make sure there is a type allocated for type numbers TYPENUMS
339 and return the type object.
340 This can create an empty (zeroed) type object.
341 TYPENUMS may be (-1, -1) to return a new type object that is not
342 put into the type vector, and so may not be referred to by number. */
345 dbx_alloc_type (int typenums
[2], struct objfile
*objfile
)
347 struct type
**type_addr
;
349 if (typenums
[0] == -1)
351 return (alloc_type (objfile
));
354 type_addr
= dbx_lookup_type (typenums
, objfile
);
356 /* If we are referring to a type not known at all yet,
357 allocate an empty type for it.
358 We will fill it in later if we find out how. */
361 *type_addr
= alloc_type (objfile
);
367 /* Allocate a floating-point type of size BITS. */
370 dbx_init_float_type (struct objfile
*objfile
, int bits
)
372 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
373 const struct floatformat
**format
;
376 format
= gdbarch_floatformat_for_type (gdbarch
, NULL
, bits
);
378 type
= init_float_type (objfile
, bits
, NULL
, format
);
380 type
= init_type (objfile
, TYPE_CODE_ERROR
, bits
, NULL
);
385 /* for all the stabs in a given stab vector, build appropriate types
386 and fix their symbols in given symbol vector. */
389 patch_block_stabs (struct pending
*symbols
, struct pending_stabs
*stabs
,
390 struct objfile
*objfile
)
399 /* for all the stab entries, find their corresponding symbols and
400 patch their types! */
402 for (ii
= 0; ii
< stabs
->count
; ++ii
)
404 name
= stabs
->stab
[ii
];
405 pp
= (char *) strchr (name
, ':');
406 gdb_assert (pp
); /* Must find a ':' or game's over. */
410 pp
= (char *) strchr (pp
, ':');
412 sym
= find_symbol_in_list (symbols
, name
, pp
- name
);
415 /* FIXME-maybe: it would be nice if we noticed whether
416 the variable was defined *anywhere*, not just whether
417 it is defined in this compilation unit. But neither
418 xlc or GCC seem to need such a definition, and until
419 we do psymtabs (so that the minimal symbols from all
420 compilation units are available now), I'm not sure
421 how to get the information. */
423 /* On xcoff, if a global is defined and never referenced,
424 ld will remove it from the executable. There is then
425 a N_GSYM stab for it, but no regular (C_EXT) symbol. */
426 sym
= allocate_symbol (objfile
);
427 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
428 SYMBOL_ACLASS_INDEX (sym
) = LOC_OPTIMIZED_OUT
;
429 SYMBOL_SET_LINKAGE_NAME
430 (sym
, obstack_strndup (&objfile
->objfile_obstack
,
433 if (*(pp
- 1) == 'F' || *(pp
- 1) == 'f')
435 /* I don't think the linker does this with functions,
436 so as far as I know this is never executed.
437 But it doesn't hurt to check. */
439 lookup_function_type (read_type (&pp
, objfile
));
443 SYMBOL_TYPE (sym
) = read_type (&pp
, objfile
);
445 add_symbol_to_list (sym
, get_global_symbols ());
450 if (*(pp
- 1) == 'F' || *(pp
- 1) == 'f')
453 lookup_function_type (read_type (&pp
, objfile
));
457 SYMBOL_TYPE (sym
) = read_type (&pp
, objfile
);
465 /* Read a number by which a type is referred to in dbx data,
466 or perhaps read a pair (FILENUM, TYPENUM) in parentheses.
467 Just a single number N is equivalent to (0,N).
468 Return the two numbers by storing them in the vector TYPENUMS.
469 TYPENUMS will then be used as an argument to dbx_lookup_type.
471 Returns 0 for success, -1 for error. */
474 read_type_number (const char **pp
, int *typenums
)
481 typenums
[0] = read_huge_number (pp
, ',', &nbits
, 0);
484 typenums
[1] = read_huge_number (pp
, ')', &nbits
, 0);
491 typenums
[1] = read_huge_number (pp
, 0, &nbits
, 0);
499 #define VISIBILITY_PRIVATE '0' /* Stabs character for private field */
500 #define VISIBILITY_PROTECTED '1' /* Stabs character for protected fld */
501 #define VISIBILITY_PUBLIC '2' /* Stabs character for public field */
502 #define VISIBILITY_IGNORE '9' /* Optimized out or zero length */
504 /* Structure for storing pointers to reference definitions for fast lookup
505 during "process_later". */
514 #define MAX_CHUNK_REFS 100
515 #define REF_CHUNK_SIZE (MAX_CHUNK_REFS * sizeof (struct ref_map))
516 #define REF_MAP_SIZE(ref_chunk) ((ref_chunk) * REF_CHUNK_SIZE)
518 static struct ref_map
*ref_map
;
520 /* Ptr to free cell in chunk's linked list. */
521 static int ref_count
= 0;
523 /* Number of chunks malloced. */
524 static int ref_chunk
= 0;
526 /* This file maintains a cache of stabs aliases found in the symbol
527 table. If the symbol table changes, this cache must be cleared
528 or we are left holding onto data in invalid obstacks. */
530 stabsread_clear_cache (void)
536 /* Create array of pointers mapping refids to symbols and stab strings.
537 Add pointers to reference definition symbols and/or their values as we
538 find them, using their reference numbers as our index.
539 These will be used later when we resolve references. */
541 ref_add (int refnum
, struct symbol
*sym
, const char *stabs
, CORE_ADDR value
)
545 if (refnum
>= ref_count
)
546 ref_count
= refnum
+ 1;
547 if (ref_count
> ref_chunk
* MAX_CHUNK_REFS
)
549 int new_slots
= ref_count
- ref_chunk
* MAX_CHUNK_REFS
;
550 int new_chunks
= new_slots
/ MAX_CHUNK_REFS
+ 1;
552 ref_map
= (struct ref_map
*)
553 xrealloc (ref_map
, REF_MAP_SIZE (ref_chunk
+ new_chunks
));
554 memset (ref_map
+ ref_chunk
* MAX_CHUNK_REFS
, 0,
555 new_chunks
* REF_CHUNK_SIZE
);
556 ref_chunk
+= new_chunks
;
558 ref_map
[refnum
].stabs
= stabs
;
559 ref_map
[refnum
].sym
= sym
;
560 ref_map
[refnum
].value
= value
;
563 /* Return defined sym for the reference REFNUM. */
565 ref_search (int refnum
)
567 if (refnum
< 0 || refnum
> ref_count
)
569 return ref_map
[refnum
].sym
;
572 /* Parse a reference id in STRING and return the resulting
573 reference number. Move STRING beyond the reference id. */
576 process_reference (const char **string
)
584 /* Advance beyond the initial '#'. */
587 /* Read number as reference id. */
588 while (*p
&& isdigit (*p
))
590 refnum
= refnum
* 10 + *p
- '0';
597 /* If STRING defines a reference, store away a pointer to the reference
598 definition for later use. Return the reference number. */
601 symbol_reference_defined (const char **string
)
603 const char *p
= *string
;
606 refnum
= process_reference (&p
);
608 /* Defining symbols end in '='. */
611 /* Symbol is being defined here. */
617 /* Must be a reference. Either the symbol has already been defined,
618 or this is a forward reference to it. */
625 stab_reg_to_regnum (struct symbol
*sym
, struct gdbarch
*gdbarch
)
627 int regno
= gdbarch_stab_reg_to_regnum (gdbarch
, SYMBOL_VALUE (sym
));
629 if (regno
< 0 || regno
>= gdbarch_num_cooked_regs (gdbarch
))
631 reg_value_complaint (regno
, gdbarch_num_cooked_regs (gdbarch
),
632 SYMBOL_PRINT_NAME (sym
));
634 regno
= gdbarch_sp_regnum (gdbarch
); /* Known safe, though useless. */
640 static const struct symbol_register_ops stab_register_funcs
= {
644 /* The "aclass" indices for computed symbols. */
646 static int stab_register_index
;
647 static int stab_regparm_index
;
650 define_symbol (CORE_ADDR valu
, const char *string
, int desc
, int type
,
651 struct objfile
*objfile
)
653 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
655 const char *p
= find_name_end (string
);
660 /* We would like to eliminate nameless symbols, but keep their types.
661 E.g. stab entry ":t10=*2" should produce a type 10, which is a pointer
662 to type 2, but, should not create a symbol to address that type. Since
663 the symbol will be nameless, there is no way any user can refer to it. */
667 /* Ignore syms with empty names. */
671 /* Ignore old-style symbols from cc -go. */
682 _("Bad stabs string '%s'"), string
);
687 /* If a nameless stab entry, all we need is the type, not the symbol.
688 e.g. ":t10=*2" or a nameless enum like " :T16=ered:0,green:1,blue:2,;" */
689 nameless
= (p
== string
|| ((string
[0] == ' ') && (string
[1] == ':')));
691 current_symbol
= sym
= allocate_symbol (objfile
);
693 if (processing_gcc_compilation
)
695 /* GCC 2.x puts the line number in desc. SunOS apparently puts in the
696 number of bytes occupied by a type or object, which we ignore. */
697 SYMBOL_LINE (sym
) = desc
;
701 SYMBOL_LINE (sym
) = 0; /* unknown */
704 SYMBOL_SET_LANGUAGE (sym
, get_current_subfile ()->language
,
705 &objfile
->objfile_obstack
);
707 if (is_cplus_marker (string
[0]))
709 /* Special GNU C++ names. */
713 SYMBOL_SET_LINKAGE_NAME (sym
, "this");
716 case 'v': /* $vtbl_ptr_type */
720 SYMBOL_SET_LINKAGE_NAME (sym
, "eh_throw");
724 /* This was an anonymous type that was never fixed up. */
728 /* SunPRO (3.0 at least) static variable encoding. */
729 if (gdbarch_static_transform_name_p (gdbarch
))
734 complaint (_("Unknown C++ symbol name `%s'"),
736 goto normal
; /* Do *something* with it. */
742 std::string new_name
;
744 if (SYMBOL_LANGUAGE (sym
) == language_cplus
)
746 char *name
= (char *) alloca (p
- string
+ 1);
748 memcpy (name
, string
, p
- string
);
749 name
[p
- string
] = '\0';
750 new_name
= cp_canonicalize_string (name
);
752 if (!new_name
.empty ())
754 SYMBOL_SET_NAMES (sym
,
755 new_name
.c_str (), new_name
.length (),
759 SYMBOL_SET_NAMES (sym
, string
, p
- string
, 1, objfile
);
761 if (SYMBOL_LANGUAGE (sym
) == language_cplus
)
762 cp_scan_for_anonymous_namespaces (get_buildsym_compunit (), sym
,
768 /* Determine the type of name being defined. */
770 /* Getting GDB to correctly skip the symbol on an undefined symbol
771 descriptor and not ever dump core is a very dodgy proposition if
772 we do things this way. I say the acorn RISC machine can just
773 fix their compiler. */
774 /* The Acorn RISC machine's compiler can put out locals that don't
775 start with "234=" or "(3,4)=", so assume anything other than the
776 deftypes we know how to handle is a local. */
777 if (!strchr ("cfFGpPrStTvVXCR", *p
))
779 if (isdigit (*p
) || *p
== '(' || *p
== '-')
788 /* c is a special case, not followed by a type-number.
789 SYMBOL:c=iVALUE for an integer constant symbol.
790 SYMBOL:c=rVALUE for a floating constant symbol.
791 SYMBOL:c=eTYPE,INTVALUE for an enum constant symbol.
792 e.g. "b:c=e6,0" for "const b = blob1"
793 (where type 6 is defined by "blobs:t6=eblob1:0,blob2:1,;"). */
796 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST
;
797 SYMBOL_TYPE (sym
) = error_type (&p
, objfile
);
798 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
799 add_symbol_to_list (sym
, get_file_symbols ());
808 struct type
*dbl_type
;
810 dbl_type
= objfile_type (objfile
)->builtin_double
;
812 = (gdb_byte
*) obstack_alloc (&objfile
->objfile_obstack
,
813 TYPE_LENGTH (dbl_type
));
815 target_float_from_string (dbl_valu
, dbl_type
, std::string (p
));
817 SYMBOL_TYPE (sym
) = dbl_type
;
818 SYMBOL_VALUE_BYTES (sym
) = dbl_valu
;
819 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST_BYTES
;
824 /* Defining integer constants this way is kind of silly,
825 since 'e' constants allows the compiler to give not
826 only the value, but the type as well. C has at least
827 int, long, unsigned int, and long long as constant
828 types; other languages probably should have at least
829 unsigned as well as signed constants. */
831 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->builtin_long
;
832 SYMBOL_VALUE (sym
) = atoi (p
);
833 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST
;
839 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->builtin_char
;
840 SYMBOL_VALUE (sym
) = atoi (p
);
841 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST
;
847 struct type
*range_type
;
850 gdb_byte
*string_local
= (gdb_byte
*) alloca (strlen (p
));
851 gdb_byte
*string_value
;
853 if (quote
!= '\'' && quote
!= '"')
855 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST
;
856 SYMBOL_TYPE (sym
) = error_type (&p
, objfile
);
857 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
858 add_symbol_to_list (sym
, get_file_symbols ());
862 /* Find matching quote, rejecting escaped quotes. */
863 while (*p
&& *p
!= quote
)
865 if (*p
== '\\' && p
[1] == quote
)
867 string_local
[ind
] = (gdb_byte
) quote
;
873 string_local
[ind
] = (gdb_byte
) (*p
);
880 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST
;
881 SYMBOL_TYPE (sym
) = error_type (&p
, objfile
);
882 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
883 add_symbol_to_list (sym
, get_file_symbols ());
887 /* NULL terminate the string. */
888 string_local
[ind
] = 0;
890 = create_static_range_type (NULL
,
891 objfile_type (objfile
)->builtin_int
,
893 SYMBOL_TYPE (sym
) = create_array_type (NULL
,
894 objfile_type (objfile
)->builtin_char
,
897 = (gdb_byte
*) obstack_alloc (&objfile
->objfile_obstack
, ind
+ 1);
898 memcpy (string_value
, string_local
, ind
+ 1);
901 SYMBOL_VALUE_BYTES (sym
) = string_value
;
902 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST_BYTES
;
907 /* SYMBOL:c=eTYPE,INTVALUE for a constant symbol whose value
908 can be represented as integral.
909 e.g. "b:c=e6,0" for "const b = blob1"
910 (where type 6 is defined by "blobs:t6=eblob1:0,blob2:1,;"). */
912 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST
;
913 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
917 SYMBOL_TYPE (sym
) = error_type (&p
, objfile
);
922 /* If the value is too big to fit in an int (perhaps because
923 it is unsigned), or something like that, we silently get
924 a bogus value. The type and everything else about it is
925 correct. Ideally, we should be using whatever we have
926 available for parsing unsigned and long long values,
928 SYMBOL_VALUE (sym
) = atoi (p
);
933 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST
;
934 SYMBOL_TYPE (sym
) = error_type (&p
, objfile
);
937 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
938 add_symbol_to_list (sym
, get_file_symbols ());
942 /* The name of a caught exception. */
943 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
944 SYMBOL_ACLASS_INDEX (sym
) = LOC_LABEL
;
945 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
946 SET_SYMBOL_VALUE_ADDRESS (sym
, valu
);
947 add_symbol_to_list (sym
, get_local_symbols ());
951 /* A static function definition. */
952 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
953 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
954 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
955 add_symbol_to_list (sym
, get_file_symbols ());
956 /* fall into process_function_types. */
958 process_function_types
:
959 /* Function result types are described as the result type in stabs.
960 We need to convert this to the function-returning-type-X type
961 in GDB. E.g. "int" is converted to "function returning int". */
962 if (TYPE_CODE (SYMBOL_TYPE (sym
)) != TYPE_CODE_FUNC
)
963 SYMBOL_TYPE (sym
) = lookup_function_type (SYMBOL_TYPE (sym
));
965 /* All functions in C++ have prototypes. Stabs does not offer an
966 explicit way to identify prototyped or unprototyped functions,
967 but both GCC and Sun CC emit stabs for the "call-as" type rather
968 than the "declared-as" type for unprototyped functions, so
969 we treat all functions as if they were prototyped. This is used
970 primarily for promotion when calling the function from GDB. */
971 TYPE_PROTOTYPED (SYMBOL_TYPE (sym
)) = 1;
973 /* fall into process_prototype_types. */
975 process_prototype_types
:
976 /* Sun acc puts declared types of arguments here. */
979 struct type
*ftype
= SYMBOL_TYPE (sym
);
984 /* Obtain a worst case guess for the number of arguments
985 by counting the semicolons. */
992 /* Allocate parameter information fields and fill them in. */
993 TYPE_FIELDS (ftype
) = (struct field
*)
994 TYPE_ALLOC (ftype
, nsemi
* sizeof (struct field
));
999 /* A type number of zero indicates the start of varargs.
1000 FIXME: GDB currently ignores vararg functions. */
1001 if (p
[0] == '0' && p
[1] == '\0')
1003 ptype
= read_type (&p
, objfile
);
1005 /* The Sun compilers mark integer arguments, which should
1006 be promoted to the width of the calling conventions, with
1007 a type which references itself. This type is turned into
1008 a TYPE_CODE_VOID type by read_type, and we have to turn
1009 it back into builtin_int here.
1010 FIXME: Do we need a new builtin_promoted_int_arg ? */
1011 if (TYPE_CODE (ptype
) == TYPE_CODE_VOID
)
1012 ptype
= objfile_type (objfile
)->builtin_int
;
1013 TYPE_FIELD_TYPE (ftype
, nparams
) = ptype
;
1014 TYPE_FIELD_ARTIFICIAL (ftype
, nparams
++) = 0;
1016 TYPE_NFIELDS (ftype
) = nparams
;
1017 TYPE_PROTOTYPED (ftype
) = 1;
1022 /* A global function definition. */
1023 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
1024 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
1025 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1026 add_symbol_to_list (sym
, get_global_symbols ());
1027 goto process_function_types
;
1030 /* For a class G (global) symbol, it appears that the
1031 value is not correct. It is necessary to search for the
1032 corresponding linker definition to find the value.
1033 These definitions appear at the end of the namelist. */
1034 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
1035 SYMBOL_ACLASS_INDEX (sym
) = LOC_STATIC
;
1036 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1037 /* Don't add symbol references to global_sym_chain.
1038 Symbol references don't have valid names and wont't match up with
1039 minimal symbols when the global_sym_chain is relocated.
1040 We'll fixup symbol references when we fixup the defining symbol. */
1041 if (SYMBOL_LINKAGE_NAME (sym
) && SYMBOL_LINKAGE_NAME (sym
)[0] != '#')
1043 i
= hashname (SYMBOL_LINKAGE_NAME (sym
));
1044 SYMBOL_VALUE_CHAIN (sym
) = global_sym_chain
[i
];
1045 global_sym_chain
[i
] = sym
;
1047 add_symbol_to_list (sym
, get_global_symbols ());
1050 /* This case is faked by a conditional above,
1051 when there is no code letter in the dbx data.
1052 Dbx data never actually contains 'l'. */
1055 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
1056 SYMBOL_ACLASS_INDEX (sym
) = LOC_LOCAL
;
1057 SYMBOL_VALUE (sym
) = valu
;
1058 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1059 add_symbol_to_list (sym
, get_local_symbols ());
1064 /* pF is a two-letter code that means a function parameter in Fortran.
1065 The type-number specifies the type of the return value.
1066 Translate it into a pointer-to-function type. */
1070 = lookup_pointer_type
1071 (lookup_function_type (read_type (&p
, objfile
)));
1074 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
1076 SYMBOL_ACLASS_INDEX (sym
) = LOC_ARG
;
1077 SYMBOL_VALUE (sym
) = valu
;
1078 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1079 SYMBOL_IS_ARGUMENT (sym
) = 1;
1080 add_symbol_to_list (sym
, get_local_symbols ());
1082 if (gdbarch_byte_order (gdbarch
) != BFD_ENDIAN_BIG
)
1084 /* On little-endian machines, this crud is never necessary,
1085 and, if the extra bytes contain garbage, is harmful. */
1089 /* If it's gcc-compiled, if it says `short', believe it. */
1090 if (processing_gcc_compilation
1091 || gdbarch_believe_pcc_promotion (gdbarch
))
1094 if (!gdbarch_believe_pcc_promotion (gdbarch
))
1096 /* If PCC says a parameter is a short or a char, it is
1098 if (TYPE_LENGTH (SYMBOL_TYPE (sym
))
1099 < gdbarch_int_bit (gdbarch
) / TARGET_CHAR_BIT
1100 && TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_INT
)
1103 TYPE_UNSIGNED (SYMBOL_TYPE (sym
))
1104 ? objfile_type (objfile
)->builtin_unsigned_int
1105 : objfile_type (objfile
)->builtin_int
;
1112 /* acc seems to use P to declare the prototypes of functions that
1113 are referenced by this file. gdb is not prepared to deal
1114 with this extra information. FIXME, it ought to. */
1117 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
1118 goto process_prototype_types
;
1123 /* Parameter which is in a register. */
1124 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
1125 SYMBOL_ACLASS_INDEX (sym
) = stab_register_index
;
1126 SYMBOL_IS_ARGUMENT (sym
) = 1;
1127 SYMBOL_VALUE (sym
) = valu
;
1128 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1129 add_symbol_to_list (sym
, get_local_symbols ());
1133 /* Register variable (either global or local). */
1134 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
1135 SYMBOL_ACLASS_INDEX (sym
) = stab_register_index
;
1136 SYMBOL_VALUE (sym
) = valu
;
1137 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1138 if (within_function
)
1140 /* Sun cc uses a pair of symbols, one 'p' and one 'r', with
1141 the same name to represent an argument passed in a
1142 register. GCC uses 'P' for the same case. So if we find
1143 such a symbol pair we combine it into one 'P' symbol.
1144 For Sun cc we need to do this regardless of
1145 stabs_argument_has_addr, because the compiler puts out
1146 the 'p' symbol even if it never saves the argument onto
1149 On most machines, we want to preserve both symbols, so
1150 that we can still get information about what is going on
1151 with the stack (VAX for computing args_printed, using
1152 stack slots instead of saved registers in backtraces,
1155 Note that this code illegally combines
1156 main(argc) struct foo argc; { register struct foo argc; }
1157 but this case is considered pathological and causes a warning
1158 from a decent compiler. */
1160 struct pending
*local_symbols
= *get_local_symbols ();
1162 && local_symbols
->nsyms
> 0
1163 && gdbarch_stabs_argument_has_addr (gdbarch
, SYMBOL_TYPE (sym
)))
1165 struct symbol
*prev_sym
;
1167 prev_sym
= local_symbols
->symbol
[local_symbols
->nsyms
- 1];
1168 if ((SYMBOL_CLASS (prev_sym
) == LOC_REF_ARG
1169 || SYMBOL_CLASS (prev_sym
) == LOC_ARG
)
1170 && strcmp (SYMBOL_LINKAGE_NAME (prev_sym
),
1171 SYMBOL_LINKAGE_NAME (sym
)) == 0)
1173 SYMBOL_ACLASS_INDEX (prev_sym
) = stab_register_index
;
1174 /* Use the type from the LOC_REGISTER; that is the type
1175 that is actually in that register. */
1176 SYMBOL_TYPE (prev_sym
) = SYMBOL_TYPE (sym
);
1177 SYMBOL_VALUE (prev_sym
) = SYMBOL_VALUE (sym
);
1182 add_symbol_to_list (sym
, get_local_symbols ());
1185 add_symbol_to_list (sym
, get_file_symbols ());
1189 /* Static symbol at top level of file. */
1190 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
1191 SYMBOL_ACLASS_INDEX (sym
) = LOC_STATIC
;
1192 SET_SYMBOL_VALUE_ADDRESS (sym
, valu
);
1193 if (gdbarch_static_transform_name_p (gdbarch
)
1194 && gdbarch_static_transform_name (gdbarch
,
1195 SYMBOL_LINKAGE_NAME (sym
))
1196 != SYMBOL_LINKAGE_NAME (sym
))
1198 struct bound_minimal_symbol msym
;
1200 msym
= lookup_minimal_symbol (SYMBOL_LINKAGE_NAME (sym
),
1202 if (msym
.minsym
!= NULL
)
1204 const char *new_name
= gdbarch_static_transform_name
1205 (gdbarch
, SYMBOL_LINKAGE_NAME (sym
));
1207 SYMBOL_SET_LINKAGE_NAME (sym
, new_name
);
1208 SET_SYMBOL_VALUE_ADDRESS (sym
,
1209 BMSYMBOL_VALUE_ADDRESS (msym
));
1212 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1213 add_symbol_to_list (sym
, get_file_symbols ());
1217 /* In Ada, there is no distinction between typedef and non-typedef;
1218 any type declaration implicitly has the equivalent of a typedef,
1219 and thus 't' is in fact equivalent to 'Tt'.
1221 Therefore, for Ada units, we check the character immediately
1222 before the 't', and if we do not find a 'T', then make sure to
1223 create the associated symbol in the STRUCT_DOMAIN ('t' definitions
1224 will be stored in the VAR_DOMAIN). If the symbol was indeed
1225 defined as 'Tt' then the STRUCT_DOMAIN symbol will be created
1226 elsewhere, so we don't need to take care of that.
1228 This is important to do, because of forward references:
1229 The cleanup of undefined types stored in undef_types only uses
1230 STRUCT_DOMAIN symbols to perform the replacement. */
1231 synonym
= (SYMBOL_LANGUAGE (sym
) == language_ada
&& p
[-2] != 'T');
1234 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
1236 /* For a nameless type, we don't want a create a symbol, thus we
1237 did not use `sym'. Return without further processing. */
1241 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
1242 SYMBOL_VALUE (sym
) = valu
;
1243 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1244 /* C++ vagaries: we may have a type which is derived from
1245 a base type which did not have its name defined when the
1246 derived class was output. We fill in the derived class's
1247 base part member's name here in that case. */
1248 if (TYPE_NAME (SYMBOL_TYPE (sym
)) != NULL
)
1249 if ((TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_STRUCT
1250 || TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_UNION
)
1251 && TYPE_N_BASECLASSES (SYMBOL_TYPE (sym
)))
1255 for (j
= TYPE_N_BASECLASSES (SYMBOL_TYPE (sym
)) - 1; j
>= 0; j
--)
1256 if (TYPE_BASECLASS_NAME (SYMBOL_TYPE (sym
), j
) == 0)
1257 TYPE_BASECLASS_NAME (SYMBOL_TYPE (sym
), j
) =
1258 TYPE_NAME (TYPE_BASECLASS (SYMBOL_TYPE (sym
), j
));
1261 if (TYPE_NAME (SYMBOL_TYPE (sym
)) == NULL
)
1263 if ((TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_PTR
1264 && strcmp (SYMBOL_LINKAGE_NAME (sym
), vtbl_ptr_name
))
1265 || TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_FUNC
)
1267 /* If we are giving a name to a type such as "pointer to
1268 foo" or "function returning foo", we better not set
1269 the TYPE_NAME. If the program contains "typedef char
1270 *caddr_t;", we don't want all variables of type char
1271 * to print as caddr_t. This is not just a
1272 consequence of GDB's type management; PCC and GCC (at
1273 least through version 2.4) both output variables of
1274 either type char * or caddr_t with the type number
1275 defined in the 't' symbol for caddr_t. If a future
1276 compiler cleans this up it GDB is not ready for it
1277 yet, but if it becomes ready we somehow need to
1278 disable this check (without breaking the PCC/GCC2.4
1283 Fortunately, this check seems not to be necessary
1284 for anything except pointers or functions. */
1285 /* ezannoni: 2000-10-26. This seems to apply for
1286 versions of gcc older than 2.8. This was the original
1287 problem: with the following code gdb would tell that
1288 the type for name1 is caddr_t, and func is char().
1290 typedef char *caddr_t;
1302 /* Pascal accepts names for pointer types. */
1303 if (get_current_subfile ()->language
== language_pascal
)
1305 TYPE_NAME (SYMBOL_TYPE (sym
)) = SYMBOL_LINKAGE_NAME (sym
);
1309 TYPE_NAME (SYMBOL_TYPE (sym
)) = SYMBOL_LINKAGE_NAME (sym
);
1312 add_symbol_to_list (sym
, get_file_symbols ());
1316 /* Create the STRUCT_DOMAIN clone. */
1317 struct symbol
*struct_sym
= allocate_symbol (objfile
);
1320 SYMBOL_ACLASS_INDEX (struct_sym
) = LOC_TYPEDEF
;
1321 SYMBOL_VALUE (struct_sym
) = valu
;
1322 SYMBOL_DOMAIN (struct_sym
) = STRUCT_DOMAIN
;
1323 if (TYPE_NAME (SYMBOL_TYPE (sym
)) == 0)
1324 TYPE_NAME (SYMBOL_TYPE (sym
))
1325 = obconcat (&objfile
->objfile_obstack
,
1326 SYMBOL_LINKAGE_NAME (sym
),
1328 add_symbol_to_list (struct_sym
, get_file_symbols ());
1334 /* Struct, union, or enum tag. For GNU C++, this can be be followed
1335 by 't' which means we are typedef'ing it as well. */
1336 synonym
= *p
== 't';
1341 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
1343 /* For a nameless type, we don't want a create a symbol, thus we
1344 did not use `sym'. Return without further processing. */
1348 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
1349 SYMBOL_VALUE (sym
) = valu
;
1350 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
1351 if (TYPE_NAME (SYMBOL_TYPE (sym
)) == 0)
1352 TYPE_NAME (SYMBOL_TYPE (sym
))
1353 = obconcat (&objfile
->objfile_obstack
,
1354 SYMBOL_LINKAGE_NAME (sym
),
1356 add_symbol_to_list (sym
, get_file_symbols ());
1360 /* Clone the sym and then modify it. */
1361 struct symbol
*typedef_sym
= allocate_symbol (objfile
);
1363 *typedef_sym
= *sym
;
1364 SYMBOL_ACLASS_INDEX (typedef_sym
) = LOC_TYPEDEF
;
1365 SYMBOL_VALUE (typedef_sym
) = valu
;
1366 SYMBOL_DOMAIN (typedef_sym
) = VAR_DOMAIN
;
1367 if (TYPE_NAME (SYMBOL_TYPE (sym
)) == 0)
1368 TYPE_NAME (SYMBOL_TYPE (sym
))
1369 = obconcat (&objfile
->objfile_obstack
,
1370 SYMBOL_LINKAGE_NAME (sym
),
1372 add_symbol_to_list (typedef_sym
, get_file_symbols ());
1377 /* Static symbol of local scope. */
1378 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
1379 SYMBOL_ACLASS_INDEX (sym
) = LOC_STATIC
;
1380 SET_SYMBOL_VALUE_ADDRESS (sym
, valu
);
1381 if (gdbarch_static_transform_name_p (gdbarch
)
1382 && gdbarch_static_transform_name (gdbarch
,
1383 SYMBOL_LINKAGE_NAME (sym
))
1384 != SYMBOL_LINKAGE_NAME (sym
))
1386 struct bound_minimal_symbol msym
;
1388 msym
= lookup_minimal_symbol (SYMBOL_LINKAGE_NAME (sym
),
1390 if (msym
.minsym
!= NULL
)
1392 const char *new_name
= gdbarch_static_transform_name
1393 (gdbarch
, SYMBOL_LINKAGE_NAME (sym
));
1395 SYMBOL_SET_LINKAGE_NAME (sym
, new_name
);
1396 SET_SYMBOL_VALUE_ADDRESS (sym
, BMSYMBOL_VALUE_ADDRESS (msym
));
1399 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1400 add_symbol_to_list (sym
, get_local_symbols ());
1404 /* Reference parameter */
1405 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
1406 SYMBOL_ACLASS_INDEX (sym
) = LOC_REF_ARG
;
1407 SYMBOL_IS_ARGUMENT (sym
) = 1;
1408 SYMBOL_VALUE (sym
) = valu
;
1409 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1410 add_symbol_to_list (sym
, get_local_symbols ());
1414 /* Reference parameter which is in a register. */
1415 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
1416 SYMBOL_ACLASS_INDEX (sym
) = stab_regparm_index
;
1417 SYMBOL_IS_ARGUMENT (sym
) = 1;
1418 SYMBOL_VALUE (sym
) = valu
;
1419 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1420 add_symbol_to_list (sym
, get_local_symbols ());
1424 /* This is used by Sun FORTRAN for "function result value".
1425 Sun claims ("dbx and dbxtool interfaces", 2nd ed)
1426 that Pascal uses it too, but when I tried it Pascal used
1427 "x:3" (local symbol) instead. */
1428 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
1429 SYMBOL_ACLASS_INDEX (sym
) = LOC_LOCAL
;
1430 SYMBOL_VALUE (sym
) = valu
;
1431 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1432 add_symbol_to_list (sym
, get_local_symbols ());
1436 SYMBOL_TYPE (sym
) = error_type (&p
, objfile
);
1437 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST
;
1438 SYMBOL_VALUE (sym
) = 0;
1439 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1440 add_symbol_to_list (sym
, get_file_symbols ());
1444 /* Some systems pass variables of certain types by reference instead
1445 of by value, i.e. they will pass the address of a structure (in a
1446 register or on the stack) instead of the structure itself. */
1448 if (gdbarch_stabs_argument_has_addr (gdbarch
, SYMBOL_TYPE (sym
))
1449 && SYMBOL_IS_ARGUMENT (sym
))
1451 /* We have to convert LOC_REGISTER to LOC_REGPARM_ADDR (for
1452 variables passed in a register). */
1453 if (SYMBOL_CLASS (sym
) == LOC_REGISTER
)
1454 SYMBOL_ACLASS_INDEX (sym
) = LOC_REGPARM_ADDR
;
1455 /* Likewise for converting LOC_ARG to LOC_REF_ARG (for the 7th
1456 and subsequent arguments on SPARC, for example). */
1457 else if (SYMBOL_CLASS (sym
) == LOC_ARG
)
1458 SYMBOL_ACLASS_INDEX (sym
) = LOC_REF_ARG
;
1464 /* Skip rest of this symbol and return an error type.
1466 General notes on error recovery: error_type always skips to the
1467 end of the symbol (modulo cretinous dbx symbol name continuation).
1468 Thus code like this:
1470 if (*(*pp)++ != ';')
1471 return error_type (pp, objfile);
1473 is wrong because if *pp starts out pointing at '\0' (typically as the
1474 result of an earlier error), it will be incremented to point to the
1475 start of the next symbol, which might produce strange results, at least
1476 if you run off the end of the string table. Instead use
1479 return error_type (pp, objfile);
1485 foo = error_type (pp, objfile);
1489 And in case it isn't obvious, the point of all this hair is so the compiler
1490 can define new types and new syntaxes, and old versions of the
1491 debugger will be able to read the new symbol tables. */
1493 static struct type
*
1494 error_type (const char **pp
, struct objfile
*objfile
)
1496 complaint (_("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 (const 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 const char *from
, *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 (_("Unrecognized cross-reference type `%c'"),
1618 code
= TYPE_CODE_STRUCT
;
1623 q1
= strchr (*pp
, '<');
1624 p
= strchr (*pp
, ':');
1626 return error_type (pp
, objfile
);
1627 if (q1
&& p
> q1
&& p
[1] == ':')
1629 int nesting_level
= 0;
1631 for (q2
= q1
; *q2
; q2
++)
1635 else if (*q2
== '>')
1637 else if (*q2
== ':' && nesting_level
== 0)
1642 return error_type (pp
, objfile
);
1645 if (get_current_subfile ()->language
== language_cplus
)
1647 char *name
= (char *) alloca (p
- *pp
+ 1);
1649 memcpy (name
, *pp
, p
- *pp
);
1650 name
[p
- *pp
] = '\0';
1652 std::string new_name
= cp_canonicalize_string (name
);
1653 if (!new_name
.empty ())
1654 type_name
= obstack_strdup (&objfile
->objfile_obstack
,
1657 if (type_name
== NULL
)
1659 char *to
= type_name
= (char *)
1660 obstack_alloc (&objfile
->objfile_obstack
, p
- *pp
+ 1);
1662 /* Copy the name. */
1669 /* Set the pointer ahead of the name which we just read, and
1674 /* If this type has already been declared, then reuse the same
1675 type, rather than allocating a new one. This saves some
1678 for (ppt
= *get_file_symbols (); ppt
; ppt
= ppt
->next
)
1679 for (i
= 0; i
< ppt
->nsyms
; i
++)
1681 struct symbol
*sym
= ppt
->symbol
[i
];
1683 if (SYMBOL_CLASS (sym
) == LOC_TYPEDEF
1684 && SYMBOL_DOMAIN (sym
) == STRUCT_DOMAIN
1685 && (TYPE_CODE (SYMBOL_TYPE (sym
)) == code
)
1686 && strcmp (SYMBOL_LINKAGE_NAME (sym
), type_name
) == 0)
1688 obstack_free (&objfile
->objfile_obstack
, type_name
);
1689 type
= SYMBOL_TYPE (sym
);
1690 if (typenums
[0] != -1)
1691 *dbx_lookup_type (typenums
, objfile
) = type
;
1696 /* Didn't find the type to which this refers, so we must
1697 be dealing with a forward reference. Allocate a type
1698 structure for it, and keep track of it so we can
1699 fill in the rest of the fields when we get the full
1701 type
= dbx_alloc_type (typenums
, objfile
);
1702 TYPE_CODE (type
) = code
;
1703 TYPE_NAME (type
) = type_name
;
1704 INIT_CPLUS_SPECIFIC (type
);
1705 TYPE_STUB (type
) = 1;
1707 add_undefined_type (type
, typenums
);
1711 case '-': /* RS/6000 built-in type */
1725 /* We deal with something like t(1,2)=(3,4)=... which
1726 the Lucid compiler and recent gcc versions (post 2.7.3) use. */
1728 /* Allocate and enter the typedef type first.
1729 This handles recursive types. */
1730 type
= dbx_alloc_type (typenums
, objfile
);
1731 TYPE_CODE (type
) = TYPE_CODE_TYPEDEF
;
1733 struct type
*xtype
= read_type (pp
, objfile
);
1737 /* It's being defined as itself. That means it is "void". */
1738 TYPE_CODE (type
) = TYPE_CODE_VOID
;
1739 TYPE_LENGTH (type
) = 1;
1741 else if (type_size
>= 0 || is_string
)
1743 /* This is the absolute wrong way to construct types. Every
1744 other debug format has found a way around this problem and
1745 the related problems with unnecessarily stubbed types;
1746 someone motivated should attempt to clean up the issue
1747 here as well. Once a type pointed to has been created it
1748 should not be modified.
1750 Well, it's not *absolutely* wrong. Constructing recursive
1751 types (trees, linked lists) necessarily entails modifying
1752 types after creating them. Constructing any loop structure
1753 entails side effects. The Dwarf 2 reader does handle this
1754 more gracefully (it never constructs more than once
1755 instance of a type object, so it doesn't have to copy type
1756 objects wholesale), but it still mutates type objects after
1757 other folks have references to them.
1759 Keep in mind that this circularity/mutation issue shows up
1760 at the source language level, too: C's "incomplete types",
1761 for example. So the proper cleanup, I think, would be to
1762 limit GDB's type smashing to match exactly those required
1763 by the source language. So GDB could have a
1764 "complete_this_type" function, but never create unnecessary
1765 copies of a type otherwise. */
1766 replace_type (type
, xtype
);
1767 TYPE_NAME (type
) = NULL
;
1771 TYPE_TARGET_STUB (type
) = 1;
1772 TYPE_TARGET_TYPE (type
) = xtype
;
1777 /* In the following types, we must be sure to overwrite any existing
1778 type that the typenums refer to, rather than allocating a new one
1779 and making the typenums point to the new one. This is because there
1780 may already be pointers to the existing type (if it had been
1781 forward-referenced), and we must change it to a pointer, function,
1782 reference, or whatever, *in-place*. */
1784 case '*': /* Pointer to another type */
1785 type1
= read_type (pp
, objfile
);
1786 type
= make_pointer_type (type1
, dbx_lookup_type (typenums
, objfile
));
1789 case '&': /* Reference to another type */
1790 type1
= read_type (pp
, objfile
);
1791 type
= make_reference_type (type1
, dbx_lookup_type (typenums
, objfile
),
1795 case 'f': /* Function returning another type */
1796 type1
= read_type (pp
, objfile
);
1797 type
= make_function_type (type1
, dbx_lookup_type (typenums
, objfile
));
1800 case 'g': /* Prototyped function. (Sun) */
1802 /* Unresolved questions:
1804 - According to Sun's ``STABS Interface Manual'', for 'f'
1805 and 'F' symbol descriptors, a `0' in the argument type list
1806 indicates a varargs function. But it doesn't say how 'g'
1807 type descriptors represent that info. Someone with access
1808 to Sun's toolchain should try it out.
1810 - According to the comment in define_symbol (search for
1811 `process_prototype_types:'), Sun emits integer arguments as
1812 types which ref themselves --- like `void' types. Do we
1813 have to deal with that here, too? Again, someone with
1814 access to Sun's toolchain should try it out and let us
1817 const char *type_start
= (*pp
) - 1;
1818 struct type
*return_type
= read_type (pp
, objfile
);
1819 struct type
*func_type
1820 = make_function_type (return_type
,
1821 dbx_lookup_type (typenums
, objfile
));
1824 struct type_list
*next
;
1828 while (**pp
&& **pp
!= '#')
1830 struct type
*arg_type
= read_type (pp
, objfile
);
1831 struct type_list
*newobj
= XALLOCA (struct type_list
);
1832 newobj
->type
= arg_type
;
1833 newobj
->next
= arg_types
;
1841 complaint (_("Prototyped function type didn't "
1842 "end arguments with `#':\n%s"),
1846 /* If there is just one argument whose type is `void', then
1847 that's just an empty argument list. */
1849 && ! arg_types
->next
1850 && TYPE_CODE (arg_types
->type
) == TYPE_CODE_VOID
)
1853 TYPE_FIELDS (func_type
)
1854 = (struct field
*) TYPE_ALLOC (func_type
,
1855 num_args
* sizeof (struct field
));
1856 memset (TYPE_FIELDS (func_type
), 0, num_args
* sizeof (struct field
));
1859 struct type_list
*t
;
1861 /* We stuck each argument type onto the front of the list
1862 when we read it, so the list is reversed. Build the
1863 fields array right-to-left. */
1864 for (t
= arg_types
, i
= num_args
- 1; t
; t
= t
->next
, i
--)
1865 TYPE_FIELD_TYPE (func_type
, i
) = t
->type
;
1867 TYPE_NFIELDS (func_type
) = num_args
;
1868 TYPE_PROTOTYPED (func_type
) = 1;
1874 case 'k': /* Const qualifier on some type (Sun) */
1875 type
= read_type (pp
, objfile
);
1876 type
= make_cv_type (1, TYPE_VOLATILE (type
), type
,
1877 dbx_lookup_type (typenums
, objfile
));
1880 case 'B': /* Volatile qual on some type (Sun) */
1881 type
= read_type (pp
, objfile
);
1882 type
= make_cv_type (TYPE_CONST (type
), 1, type
,
1883 dbx_lookup_type (typenums
, objfile
));
1887 if (isdigit (**pp
) || **pp
== '(' || **pp
== '-')
1888 { /* Member (class & variable) type */
1889 /* FIXME -- we should be doing smash_to_XXX types here. */
1891 struct type
*domain
= read_type (pp
, objfile
);
1892 struct type
*memtype
;
1895 /* Invalid member type data format. */
1896 return error_type (pp
, objfile
);
1899 memtype
= read_type (pp
, objfile
);
1900 type
= dbx_alloc_type (typenums
, objfile
);
1901 smash_to_memberptr_type (type
, domain
, memtype
);
1904 /* type attribute */
1906 const char *attr
= *pp
;
1908 /* Skip to the semicolon. */
1909 while (**pp
!= ';' && **pp
!= '\0')
1912 return error_type (pp
, objfile
);
1914 ++ * pp
; /* Skip the semicolon. */
1918 case 's': /* Size attribute */
1919 type_size
= atoi (attr
+ 1);
1924 case 'S': /* String attribute */
1925 /* FIXME: check to see if following type is array? */
1929 case 'V': /* Vector attribute */
1930 /* FIXME: check to see if following type is array? */
1935 /* Ignore unrecognized type attributes, so future compilers
1936 can invent new ones. */
1944 case '#': /* Method (class & fn) type */
1945 if ((*pp
)[0] == '#')
1947 /* We'll get the parameter types from the name. */
1948 struct type
*return_type
;
1951 return_type
= read_type (pp
, objfile
);
1952 if (*(*pp
)++ != ';')
1953 complaint (_("invalid (minimal) member type "
1954 "data format at symtab pos %d."),
1956 type
= allocate_stub_method (return_type
);
1957 if (typenums
[0] != -1)
1958 *dbx_lookup_type (typenums
, objfile
) = type
;
1962 struct type
*domain
= read_type (pp
, objfile
);
1963 struct type
*return_type
;
1968 /* Invalid member type data format. */
1969 return error_type (pp
, objfile
);
1973 return_type
= read_type (pp
, objfile
);
1974 args
= read_args (pp
, ';', objfile
, &nargs
, &varargs
);
1976 return error_type (pp
, objfile
);
1977 type
= dbx_alloc_type (typenums
, objfile
);
1978 smash_to_method_type (type
, domain
, return_type
, args
,
1983 case 'r': /* Range type */
1984 type
= read_range_type (pp
, typenums
, type_size
, objfile
);
1985 if (typenums
[0] != -1)
1986 *dbx_lookup_type (typenums
, objfile
) = type
;
1991 /* Sun ACC builtin int type */
1992 type
= read_sun_builtin_type (pp
, typenums
, objfile
);
1993 if (typenums
[0] != -1)
1994 *dbx_lookup_type (typenums
, objfile
) = type
;
1998 case 'R': /* Sun ACC builtin float type */
1999 type
= read_sun_floating_type (pp
, typenums
, objfile
);
2000 if (typenums
[0] != -1)
2001 *dbx_lookup_type (typenums
, objfile
) = type
;
2004 case 'e': /* Enumeration type */
2005 type
= dbx_alloc_type (typenums
, objfile
);
2006 type
= read_enum_type (pp
, type
, objfile
);
2007 if (typenums
[0] != -1)
2008 *dbx_lookup_type (typenums
, objfile
) = type
;
2011 case 's': /* Struct type */
2012 case 'u': /* Union type */
2014 enum type_code type_code
= TYPE_CODE_UNDEF
;
2015 type
= dbx_alloc_type (typenums
, objfile
);
2016 switch (type_descriptor
)
2019 type_code
= TYPE_CODE_STRUCT
;
2022 type_code
= TYPE_CODE_UNION
;
2025 type
= read_struct_type (pp
, type
, type_code
, objfile
);
2029 case 'a': /* Array type */
2031 return error_type (pp
, objfile
);
2034 type
= dbx_alloc_type (typenums
, objfile
);
2035 type
= read_array_type (pp
, type
, objfile
);
2037 TYPE_CODE (type
) = TYPE_CODE_STRING
;
2039 make_vector_type (type
);
2042 case 'S': /* Set type */
2043 type1
= read_type (pp
, objfile
);
2044 type
= create_set_type (NULL
, type1
);
2045 if (typenums
[0] != -1)
2046 *dbx_lookup_type (typenums
, objfile
) = type
;
2050 --*pp
; /* Go back to the symbol in error. */
2051 /* Particularly important if it was \0! */
2052 return error_type (pp
, objfile
);
2057 warning (_("GDB internal error, type is NULL in stabsread.c."));
2058 return error_type (pp
, objfile
);
2061 /* Size specified in a type attribute overrides any other size. */
2062 if (type_size
!= -1)
2063 TYPE_LENGTH (type
) = (type_size
+ TARGET_CHAR_BIT
- 1) / TARGET_CHAR_BIT
;
2068 /* RS/6000 xlc/dbx combination uses a set of builtin types, starting from -1.
2069 Return the proper type node for a given builtin type number. */
2071 static const struct objfile_key
<struct type
*,
2072 gdb::noop_deleter
<struct type
*>>
2073 rs6000_builtin_type_data
;
2075 static struct type
*
2076 rs6000_builtin_type (int typenum
, struct objfile
*objfile
)
2078 struct type
**negative_types
= rs6000_builtin_type_data
.get (objfile
);
2080 /* We recognize types numbered from -NUMBER_RECOGNIZED to -1. */
2081 #define NUMBER_RECOGNIZED 34
2082 struct type
*rettype
= NULL
;
2084 if (typenum
>= 0 || typenum
< -NUMBER_RECOGNIZED
)
2086 complaint (_("Unknown builtin type %d"), typenum
);
2087 return objfile_type (objfile
)->builtin_error
;
2090 if (!negative_types
)
2092 /* This includes an empty slot for type number -0. */
2093 negative_types
= OBSTACK_CALLOC (&objfile
->objfile_obstack
,
2094 NUMBER_RECOGNIZED
+ 1, struct type
*);
2095 rs6000_builtin_type_data
.set (objfile
, negative_types
);
2098 if (negative_types
[-typenum
] != NULL
)
2099 return negative_types
[-typenum
];
2101 #if TARGET_CHAR_BIT != 8
2102 #error This code wrong for TARGET_CHAR_BIT not 8
2103 /* These definitions all assume that TARGET_CHAR_BIT is 8. I think
2104 that if that ever becomes not true, the correct fix will be to
2105 make the size in the struct type to be in bits, not in units of
2112 /* The size of this and all the other types are fixed, defined
2113 by the debugging format. If there is a type called "int" which
2114 is other than 32 bits, then it should use a new negative type
2115 number (or avoid negative type numbers for that case).
2116 See stabs.texinfo. */
2117 rettype
= init_integer_type (objfile
, 32, 0, "int");
2120 rettype
= init_integer_type (objfile
, 8, 0, "char");
2121 TYPE_NOSIGN (rettype
) = 1;
2124 rettype
= init_integer_type (objfile
, 16, 0, "short");
2127 rettype
= init_integer_type (objfile
, 32, 0, "long");
2130 rettype
= init_integer_type (objfile
, 8, 1, "unsigned char");
2133 rettype
= init_integer_type (objfile
, 8, 0, "signed char");
2136 rettype
= init_integer_type (objfile
, 16, 1, "unsigned short");
2139 rettype
= init_integer_type (objfile
, 32, 1, "unsigned int");
2142 rettype
= init_integer_type (objfile
, 32, 1, "unsigned");
2145 rettype
= init_integer_type (objfile
, 32, 1, "unsigned long");
2148 rettype
= init_type (objfile
, TYPE_CODE_VOID
, TARGET_CHAR_BIT
, "void");
2151 /* IEEE single precision (32 bit). */
2152 rettype
= init_float_type (objfile
, 32, "float",
2153 floatformats_ieee_single
);
2156 /* IEEE double precision (64 bit). */
2157 rettype
= init_float_type (objfile
, 64, "double",
2158 floatformats_ieee_double
);
2161 /* This is an IEEE double on the RS/6000, and different machines with
2162 different sizes for "long double" should use different negative
2163 type numbers. See stabs.texinfo. */
2164 rettype
= init_float_type (objfile
, 64, "long double",
2165 floatformats_ieee_double
);
2168 rettype
= init_integer_type (objfile
, 32, 0, "integer");
2171 rettype
= init_boolean_type (objfile
, 32, 1, "boolean");
2174 rettype
= init_float_type (objfile
, 32, "short real",
2175 floatformats_ieee_single
);
2178 rettype
= init_float_type (objfile
, 64, "real",
2179 floatformats_ieee_double
);
2182 rettype
= init_type (objfile
, TYPE_CODE_ERROR
, 0, "stringptr");
2185 rettype
= init_character_type (objfile
, 8, 1, "character");
2188 rettype
= init_boolean_type (objfile
, 8, 1, "logical*1");
2191 rettype
= init_boolean_type (objfile
, 16, 1, "logical*2");
2194 rettype
= init_boolean_type (objfile
, 32, 1, "logical*4");
2197 rettype
= init_boolean_type (objfile
, 32, 1, "logical");
2200 /* Complex type consisting of two IEEE single precision values. */
2201 rettype
= init_complex_type (objfile
, "complex",
2202 rs6000_builtin_type (12, objfile
));
2205 /* Complex type consisting of two IEEE double precision values. */
2206 rettype
= init_complex_type (objfile
, "double complex",
2207 rs6000_builtin_type (13, objfile
));
2210 rettype
= init_integer_type (objfile
, 8, 0, "integer*1");
2213 rettype
= init_integer_type (objfile
, 16, 0, "integer*2");
2216 rettype
= init_integer_type (objfile
, 32, 0, "integer*4");
2219 rettype
= init_character_type (objfile
, 16, 0, "wchar");
2222 rettype
= init_integer_type (objfile
, 64, 0, "long long");
2225 rettype
= init_integer_type (objfile
, 64, 1, "unsigned long long");
2228 rettype
= init_integer_type (objfile
, 64, 1, "logical*8");
2231 rettype
= init_integer_type (objfile
, 64, 0, "integer*8");
2234 negative_types
[-typenum
] = rettype
;
2238 /* This page contains subroutines of read_type. */
2240 /* Wrapper around method_name_from_physname to flag a complaint
2241 if there is an error. */
2244 stabs_method_name_from_physname (const char *physname
)
2248 method_name
= method_name_from_physname (physname
);
2250 if (method_name
== NULL
)
2252 complaint (_("Method has bad physname %s\n"), physname
);
2259 /* Read member function stabs info for C++ classes. The form of each member
2262 NAME :: TYPENUM[=type definition] ARGS : PHYSNAME ;
2264 An example with two member functions is:
2266 afunc1::20=##15;:i;2A.;afunc2::20:i;2A.;
2268 For the case of overloaded operators, the format is op$::*.funcs, where
2269 $ is the CPLUS_MARKER (usually '$'), `*' holds the place for an operator
2270 name (such as `+=') and `.' marks the end of the operator name.
2272 Returns 1 for success, 0 for failure. */
2275 read_member_functions (struct stab_field_info
*fip
, const char **pp
,
2276 struct type
*type
, struct objfile
*objfile
)
2283 struct next_fnfield
*next
;
2284 struct fn_field fn_field
;
2287 struct type
*look_ahead_type
;
2288 struct next_fnfieldlist
*new_fnlist
;
2289 struct next_fnfield
*new_sublist
;
2293 /* Process each list until we find something that is not a member function
2294 or find the end of the functions. */
2298 /* We should be positioned at the start of the function name.
2299 Scan forward to find the first ':' and if it is not the
2300 first of a "::" delimiter, then this is not a member function. */
2312 look_ahead_type
= NULL
;
2315 new_fnlist
= OBSTACK_ZALLOC (&fip
->obstack
, struct next_fnfieldlist
);
2317 if ((*pp
)[0] == 'o' && (*pp
)[1] == 'p' && is_cplus_marker ((*pp
)[2]))
2319 /* This is a completely wierd case. In order to stuff in the
2320 names that might contain colons (the usual name delimiter),
2321 Mike Tiemann defined a different name format which is
2322 signalled if the identifier is "op$". In that case, the
2323 format is "op$::XXXX." where XXXX is the name. This is
2324 used for names like "+" or "=". YUUUUUUUK! FIXME! */
2325 /* This lets the user type "break operator+".
2326 We could just put in "+" as the name, but that wouldn't
2328 static char opname
[32] = "op$";
2329 char *o
= opname
+ 3;
2331 /* Skip past '::'. */
2334 STABS_CONTINUE (pp
, objfile
);
2340 main_fn_name
= savestring (opname
, o
- opname
);
2346 main_fn_name
= savestring (*pp
, p
- *pp
);
2347 /* Skip past '::'. */
2350 new_fnlist
->fn_fieldlist
.name
= main_fn_name
;
2354 new_sublist
= OBSTACK_ZALLOC (&fip
->obstack
, struct next_fnfield
);
2356 /* Check for and handle cretinous dbx symbol name continuation! */
2357 if (look_ahead_type
== NULL
)
2360 STABS_CONTINUE (pp
, objfile
);
2362 new_sublist
->fn_field
.type
= read_type (pp
, objfile
);
2365 /* Invalid symtab info for member function. */
2371 /* g++ version 1 kludge */
2372 new_sublist
->fn_field
.type
= look_ahead_type
;
2373 look_ahead_type
= NULL
;
2383 /* These are methods, not functions. */
2384 if (TYPE_CODE (new_sublist
->fn_field
.type
) == TYPE_CODE_FUNC
)
2385 TYPE_CODE (new_sublist
->fn_field
.type
) = TYPE_CODE_METHOD
;
2387 gdb_assert (TYPE_CODE (new_sublist
->fn_field
.type
)
2388 == TYPE_CODE_METHOD
);
2390 /* If this is just a stub, then we don't have the real name here. */
2391 if (TYPE_STUB (new_sublist
->fn_field
.type
))
2393 if (!TYPE_SELF_TYPE (new_sublist
->fn_field
.type
))
2394 set_type_self_type (new_sublist
->fn_field
.type
, type
);
2395 new_sublist
->fn_field
.is_stub
= 1;
2398 new_sublist
->fn_field
.physname
= savestring (*pp
, p
- *pp
);
2401 /* Set this member function's visibility fields. */
2404 case VISIBILITY_PRIVATE
:
2405 new_sublist
->fn_field
.is_private
= 1;
2407 case VISIBILITY_PROTECTED
:
2408 new_sublist
->fn_field
.is_protected
= 1;
2412 STABS_CONTINUE (pp
, objfile
);
2415 case 'A': /* Normal functions. */
2416 new_sublist
->fn_field
.is_const
= 0;
2417 new_sublist
->fn_field
.is_volatile
= 0;
2420 case 'B': /* `const' member functions. */
2421 new_sublist
->fn_field
.is_const
= 1;
2422 new_sublist
->fn_field
.is_volatile
= 0;
2425 case 'C': /* `volatile' member function. */
2426 new_sublist
->fn_field
.is_const
= 0;
2427 new_sublist
->fn_field
.is_volatile
= 1;
2430 case 'D': /* `const volatile' member function. */
2431 new_sublist
->fn_field
.is_const
= 1;
2432 new_sublist
->fn_field
.is_volatile
= 1;
2435 case '*': /* File compiled with g++ version 1 --
2441 complaint (_("const/volatile indicator missing, got '%c'"),
2451 /* virtual member function, followed by index.
2452 The sign bit is set to distinguish pointers-to-methods
2453 from virtual function indicies. Since the array is
2454 in words, the quantity must be shifted left by 1
2455 on 16 bit machine, and by 2 on 32 bit machine, forcing
2456 the sign bit out, and usable as a valid index into
2457 the array. Remove the sign bit here. */
2458 new_sublist
->fn_field
.voffset
=
2459 (0x7fffffff & read_huge_number (pp
, ';', &nbits
, 0)) + 2;
2463 STABS_CONTINUE (pp
, objfile
);
2464 if (**pp
== ';' || **pp
== '\0')
2466 /* Must be g++ version 1. */
2467 new_sublist
->fn_field
.fcontext
= 0;
2471 /* Figure out from whence this virtual function came.
2472 It may belong to virtual function table of
2473 one of its baseclasses. */
2474 look_ahead_type
= read_type (pp
, objfile
);
2477 /* g++ version 1 overloaded methods. */
2481 new_sublist
->fn_field
.fcontext
= look_ahead_type
;
2490 look_ahead_type
= NULL
;
2496 /* static member function. */
2498 int slen
= strlen (main_fn_name
);
2500 new_sublist
->fn_field
.voffset
= VOFFSET_STATIC
;
2502 /* For static member functions, we can't tell if they
2503 are stubbed, as they are put out as functions, and not as
2505 GCC v2 emits the fully mangled name if
2506 dbxout.c:flag_minimal_debug is not set, so we have to
2507 detect a fully mangled physname here and set is_stub
2508 accordingly. Fully mangled physnames in v2 start with
2509 the member function name, followed by two underscores.
2510 GCC v3 currently always emits stubbed member functions,
2511 but with fully mangled physnames, which start with _Z. */
2512 if (!(strncmp (new_sublist
->fn_field
.physname
,
2513 main_fn_name
, slen
) == 0
2514 && new_sublist
->fn_field
.physname
[slen
] == '_'
2515 && new_sublist
->fn_field
.physname
[slen
+ 1] == '_'))
2517 new_sublist
->fn_field
.is_stub
= 1;
2524 complaint (_("member function type missing, got '%c'"),
2526 /* Normal member function. */
2530 /* normal member function. */
2531 new_sublist
->fn_field
.voffset
= 0;
2532 new_sublist
->fn_field
.fcontext
= 0;
2536 new_sublist
->next
= sublist
;
2537 sublist
= new_sublist
;
2539 STABS_CONTINUE (pp
, objfile
);
2541 while (**pp
!= ';' && **pp
!= '\0');
2544 STABS_CONTINUE (pp
, objfile
);
2546 /* Skip GCC 3.X member functions which are duplicates of the callable
2547 constructor/destructor. */
2548 if (strcmp_iw (main_fn_name
, "__base_ctor ") == 0
2549 || strcmp_iw (main_fn_name
, "__base_dtor ") == 0
2550 || strcmp (main_fn_name
, "__deleting_dtor") == 0)
2552 xfree (main_fn_name
);
2556 int has_destructor
= 0, has_other
= 0;
2558 struct next_fnfield
*tmp_sublist
;
2560 /* Various versions of GCC emit various mostly-useless
2561 strings in the name field for special member functions.
2563 For stub methods, we need to defer correcting the name
2564 until we are ready to unstub the method, because the current
2565 name string is used by gdb_mangle_name. The only stub methods
2566 of concern here are GNU v2 operators; other methods have their
2567 names correct (see caveat below).
2569 For non-stub methods, in GNU v3, we have a complete physname.
2570 Therefore we can safely correct the name now. This primarily
2571 affects constructors and destructors, whose name will be
2572 __comp_ctor or __comp_dtor instead of Foo or ~Foo. Cast
2573 operators will also have incorrect names; for instance,
2574 "operator int" will be named "operator i" (i.e. the type is
2577 For non-stub methods in GNU v2, we have no easy way to
2578 know if we have a complete physname or not. For most
2579 methods the result depends on the platform (if CPLUS_MARKER
2580 can be `$' or `.', it will use minimal debug information, or
2581 otherwise the full physname will be included).
2583 Rather than dealing with this, we take a different approach.
2584 For v3 mangled names, we can use the full physname; for v2,
2585 we use cplus_demangle_opname (which is actually v2 specific),
2586 because the only interesting names are all operators - once again
2587 barring the caveat below. Skip this process if any method in the
2588 group is a stub, to prevent our fouling up the workings of
2591 The caveat: GCC 2.95.x (and earlier?) put constructors and
2592 destructors in the same method group. We need to split this
2593 into two groups, because they should have different names.
2594 So for each method group we check whether it contains both
2595 routines whose physname appears to be a destructor (the physnames
2596 for and destructors are always provided, due to quirks in v2
2597 mangling) and routines whose physname does not appear to be a
2598 destructor. If so then we break up the list into two halves.
2599 Even if the constructors and destructors aren't in the same group
2600 the destructor will still lack the leading tilde, so that also
2603 So, to summarize what we expect and handle here:
2605 Given Given Real Real Action
2606 method name physname physname method name
2608 __opi [none] __opi__3Foo operator int opname
2610 Foo _._3Foo _._3Foo ~Foo separate and
2612 operator i _ZN3FoocviEv _ZN3FoocviEv operator int demangle
2613 __comp_ctor _ZN3FooC1ERKS_ _ZN3FooC1ERKS_ Foo demangle
2616 tmp_sublist
= sublist
;
2617 while (tmp_sublist
!= NULL
)
2619 if (tmp_sublist
->fn_field
.physname
[0] == '_'
2620 && tmp_sublist
->fn_field
.physname
[1] == 'Z')
2623 if (is_destructor_name (tmp_sublist
->fn_field
.physname
))
2628 tmp_sublist
= tmp_sublist
->next
;
2631 if (has_destructor
&& has_other
)
2633 struct next_fnfieldlist
*destr_fnlist
;
2634 struct next_fnfield
*last_sublist
;
2636 /* Create a new fn_fieldlist for the destructors. */
2638 destr_fnlist
= OBSTACK_ZALLOC (&fip
->obstack
,
2639 struct next_fnfieldlist
);
2641 destr_fnlist
->fn_fieldlist
.name
2642 = obconcat (&objfile
->objfile_obstack
, "~",
2643 new_fnlist
->fn_fieldlist
.name
, (char *) NULL
);
2645 destr_fnlist
->fn_fieldlist
.fn_fields
=
2646 XOBNEWVEC (&objfile
->objfile_obstack
,
2647 struct fn_field
, has_destructor
);
2648 memset (destr_fnlist
->fn_fieldlist
.fn_fields
, 0,
2649 sizeof (struct fn_field
) * has_destructor
);
2650 tmp_sublist
= sublist
;
2651 last_sublist
= NULL
;
2653 while (tmp_sublist
!= NULL
)
2655 if (!is_destructor_name (tmp_sublist
->fn_field
.physname
))
2657 tmp_sublist
= tmp_sublist
->next
;
2661 destr_fnlist
->fn_fieldlist
.fn_fields
[i
++]
2662 = tmp_sublist
->fn_field
;
2664 last_sublist
->next
= tmp_sublist
->next
;
2666 sublist
= tmp_sublist
->next
;
2667 last_sublist
= tmp_sublist
;
2668 tmp_sublist
= tmp_sublist
->next
;
2671 destr_fnlist
->fn_fieldlist
.length
= has_destructor
;
2672 destr_fnlist
->next
= fip
->fnlist
;
2673 fip
->fnlist
= destr_fnlist
;
2675 length
-= has_destructor
;
2679 /* v3 mangling prevents the use of abbreviated physnames,
2680 so we can do this here. There are stubbed methods in v3
2682 - in -gstabs instead of -gstabs+
2683 - or for static methods, which are output as a function type
2684 instead of a method type. */
2685 char *new_method_name
=
2686 stabs_method_name_from_physname (sublist
->fn_field
.physname
);
2688 if (new_method_name
!= NULL
2689 && strcmp (new_method_name
,
2690 new_fnlist
->fn_fieldlist
.name
) != 0)
2692 new_fnlist
->fn_fieldlist
.name
= new_method_name
;
2693 xfree (main_fn_name
);
2696 xfree (new_method_name
);
2698 else if (has_destructor
&& new_fnlist
->fn_fieldlist
.name
[0] != '~')
2700 new_fnlist
->fn_fieldlist
.name
=
2701 obconcat (&objfile
->objfile_obstack
,
2702 "~", main_fn_name
, (char *)NULL
);
2703 xfree (main_fn_name
);
2706 new_fnlist
->fn_fieldlist
.fn_fields
2707 = OBSTACK_CALLOC (&objfile
->objfile_obstack
, length
, fn_field
);
2708 for (i
= length
; (i
--, sublist
); sublist
= sublist
->next
)
2710 new_fnlist
->fn_fieldlist
.fn_fields
[i
] = sublist
->fn_field
;
2713 new_fnlist
->fn_fieldlist
.length
= length
;
2714 new_fnlist
->next
= fip
->fnlist
;
2715 fip
->fnlist
= new_fnlist
;
2722 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
2723 TYPE_FN_FIELDLISTS (type
) = (struct fn_fieldlist
*)
2724 TYPE_ALLOC (type
, sizeof (struct fn_fieldlist
) * nfn_fields
);
2725 memset (TYPE_FN_FIELDLISTS (type
), 0,
2726 sizeof (struct fn_fieldlist
) * nfn_fields
);
2727 TYPE_NFN_FIELDS (type
) = nfn_fields
;
2733 /* Special GNU C++ name.
2735 Returns 1 for success, 0 for failure. "failure" means that we can't
2736 keep parsing and it's time for error_type(). */
2739 read_cpp_abbrev (struct stab_field_info
*fip
, const char **pp
,
2740 struct type
*type
, struct objfile
*objfile
)
2745 struct type
*context
;
2755 /* At this point, *pp points to something like "22:23=*22...",
2756 where the type number before the ':' is the "context" and
2757 everything after is a regular type definition. Lookup the
2758 type, find it's name, and construct the field name. */
2760 context
= read_type (pp
, objfile
);
2764 case 'f': /* $vf -- a virtual function table pointer */
2765 name
= TYPE_NAME (context
);
2770 fip
->list
->field
.name
= obconcat (&objfile
->objfile_obstack
,
2771 vptr_name
, name
, (char *) NULL
);
2774 case 'b': /* $vb -- a virtual bsomethingorother */
2775 name
= TYPE_NAME (context
);
2778 complaint (_("C++ abbreviated type name "
2779 "unknown at symtab pos %d"),
2783 fip
->list
->field
.name
= obconcat (&objfile
->objfile_obstack
, vb_name
,
2784 name
, (char *) NULL
);
2788 invalid_cpp_abbrev_complaint (*pp
);
2789 fip
->list
->field
.name
= obconcat (&objfile
->objfile_obstack
,
2790 "INVALID_CPLUSPLUS_ABBREV",
2795 /* At this point, *pp points to the ':'. Skip it and read the
2801 invalid_cpp_abbrev_complaint (*pp
);
2804 fip
->list
->field
.type
= read_type (pp
, objfile
);
2806 (*pp
)++; /* Skip the comma. */
2813 SET_FIELD_BITPOS (fip
->list
->field
,
2814 read_huge_number (pp
, ';', &nbits
, 0));
2818 /* This field is unpacked. */
2819 FIELD_BITSIZE (fip
->list
->field
) = 0;
2820 fip
->list
->visibility
= VISIBILITY_PRIVATE
;
2824 invalid_cpp_abbrev_complaint (*pp
);
2825 /* We have no idea what syntax an unrecognized abbrev would have, so
2826 better return 0. If we returned 1, we would need to at least advance
2827 *pp to avoid an infinite loop. */
2834 read_one_struct_field (struct stab_field_info
*fip
, const char **pp
,
2835 const char *p
, struct type
*type
,
2836 struct objfile
*objfile
)
2838 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
2840 fip
->list
->field
.name
2841 = obstack_strndup (&objfile
->objfile_obstack
, *pp
, p
- *pp
);
2844 /* This means we have a visibility for a field coming. */
2848 fip
->list
->visibility
= *(*pp
)++;
2852 /* normal dbx-style format, no explicit visibility */
2853 fip
->list
->visibility
= VISIBILITY_PUBLIC
;
2856 fip
->list
->field
.type
= read_type (pp
, objfile
);
2861 /* Possible future hook for nested types. */
2864 fip
->list
->field
.bitpos
= (long) -2; /* nested type */
2874 /* Static class member. */
2875 SET_FIELD_PHYSNAME (fip
->list
->field
, savestring (*pp
, p
- *pp
));
2879 else if (**pp
!= ',')
2881 /* Bad structure-type format. */
2882 stabs_general_complaint ("bad structure-type format");
2886 (*pp
)++; /* Skip the comma. */
2891 SET_FIELD_BITPOS (fip
->list
->field
,
2892 read_huge_number (pp
, ',', &nbits
, 0));
2895 stabs_general_complaint ("bad structure-type format");
2898 FIELD_BITSIZE (fip
->list
->field
) = read_huge_number (pp
, ';', &nbits
, 0);
2901 stabs_general_complaint ("bad structure-type format");
2906 if (FIELD_BITPOS (fip
->list
->field
) == 0
2907 && FIELD_BITSIZE (fip
->list
->field
) == 0)
2909 /* This can happen in two cases: (1) at least for gcc 2.4.5 or so,
2910 it is a field which has been optimized out. The correct stab for
2911 this case is to use VISIBILITY_IGNORE, but that is a recent
2912 invention. (2) It is a 0-size array. For example
2913 union { int num; char str[0]; } foo. Printing _("<no value>" for
2914 str in "p foo" is OK, since foo.str (and thus foo.str[3])
2915 will continue to work, and a 0-size array as a whole doesn't
2916 have any contents to print.
2918 I suspect this probably could also happen with gcc -gstabs (not
2919 -gstabs+) for static fields, and perhaps other C++ extensions.
2920 Hopefully few people use -gstabs with gdb, since it is intended
2921 for dbx compatibility. */
2923 /* Ignore this field. */
2924 fip
->list
->visibility
= VISIBILITY_IGNORE
;
2928 /* Detect an unpacked field and mark it as such.
2929 dbx gives a bit size for all fields.
2930 Note that forward refs cannot be packed,
2931 and treat enums as if they had the width of ints. */
2933 struct type
*field_type
= check_typedef (FIELD_TYPE (fip
->list
->field
));
2935 if (TYPE_CODE (field_type
) != TYPE_CODE_INT
2936 && TYPE_CODE (field_type
) != TYPE_CODE_RANGE
2937 && TYPE_CODE (field_type
) != TYPE_CODE_BOOL
2938 && TYPE_CODE (field_type
) != TYPE_CODE_ENUM
)
2940 FIELD_BITSIZE (fip
->list
->field
) = 0;
2942 if ((FIELD_BITSIZE (fip
->list
->field
)
2943 == TARGET_CHAR_BIT
* TYPE_LENGTH (field_type
)
2944 || (TYPE_CODE (field_type
) == TYPE_CODE_ENUM
2945 && FIELD_BITSIZE (fip
->list
->field
)
2946 == gdbarch_int_bit (gdbarch
))
2949 FIELD_BITPOS (fip
->list
->field
) % 8 == 0)
2951 FIELD_BITSIZE (fip
->list
->field
) = 0;
2957 /* Read struct or class data fields. They have the form:
2959 NAME : [VISIBILITY] TYPENUM , BITPOS , BITSIZE ;
2961 At the end, we see a semicolon instead of a field.
2963 In C++, this may wind up being NAME:?TYPENUM:PHYSNAME; for
2966 The optional VISIBILITY is one of:
2968 '/0' (VISIBILITY_PRIVATE)
2969 '/1' (VISIBILITY_PROTECTED)
2970 '/2' (VISIBILITY_PUBLIC)
2971 '/9' (VISIBILITY_IGNORE)
2973 or nothing, for C style fields with public visibility.
2975 Returns 1 for success, 0 for failure. */
2978 read_struct_fields (struct stab_field_info
*fip
, const char **pp
,
2979 struct type
*type
, struct objfile
*objfile
)
2982 struct nextfield
*newobj
;
2984 /* We better set p right now, in case there are no fields at all... */
2988 /* Read each data member type until we find the terminating ';' at the end of
2989 the data member list, or break for some other reason such as finding the
2990 start of the member function list. */
2991 /* Stab string for structure/union does not end with two ';' in
2992 SUN C compiler 5.3 i.e. F6U2, hence check for end of string. */
2994 while (**pp
!= ';' && **pp
!= '\0')
2996 STABS_CONTINUE (pp
, objfile
);
2997 /* Get space to record the next field's data. */
2998 newobj
= OBSTACK_ZALLOC (&fip
->obstack
, struct nextfield
);
3000 newobj
->next
= fip
->list
;
3003 /* Get the field name. */
3006 /* If is starts with CPLUS_MARKER it is a special abbreviation,
3007 unless the CPLUS_MARKER is followed by an underscore, in
3008 which case it is just the name of an anonymous type, which we
3009 should handle like any other type name. */
3011 if (is_cplus_marker (p
[0]) && p
[1] != '_')
3013 if (!read_cpp_abbrev (fip
, pp
, type
, objfile
))
3018 /* Look for the ':' that separates the field name from the field
3019 values. Data members are delimited by a single ':', while member
3020 functions are delimited by a pair of ':'s. When we hit the member
3021 functions (if any), terminate scan loop and return. */
3023 while (*p
!= ':' && *p
!= '\0')
3030 /* Check to see if we have hit the member functions yet. */
3035 read_one_struct_field (fip
, pp
, p
, type
, objfile
);
3037 if (p
[0] == ':' && p
[1] == ':')
3039 /* (the deleted) chill the list of fields: the last entry (at
3040 the head) is a partially constructed entry which we now
3042 fip
->list
= fip
->list
->next
;
3047 /* The stabs for C++ derived classes contain baseclass information which
3048 is marked by a '!' character after the total size. This function is
3049 called when we encounter the baseclass marker, and slurps up all the
3050 baseclass information.
3052 Immediately following the '!' marker is the number of base classes that
3053 the class is derived from, followed by information for each base class.
3054 For each base class, there are two visibility specifiers, a bit offset
3055 to the base class information within the derived class, a reference to
3056 the type for the base class, and a terminating semicolon.
3058 A typical example, with two base classes, would be "!2,020,19;0264,21;".
3060 Baseclass information marker __________________|| | | | | | |
3061 Number of baseclasses __________________________| | | | | | |
3062 Visibility specifiers (2) ________________________| | | | | |
3063 Offset in bits from start of class _________________| | | | |
3064 Type number for base class ___________________________| | | |
3065 Visibility specifiers (2) _______________________________| | |
3066 Offset in bits from start of class ________________________| |
3067 Type number of base class ____________________________________|
3069 Return 1 for success, 0 for (error-type-inducing) failure. */
3075 read_baseclasses (struct stab_field_info
*fip
, const char **pp
,
3076 struct type
*type
, struct objfile
*objfile
)
3079 struct nextfield
*newobj
;
3087 /* Skip the '!' baseclass information marker. */
3091 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
3095 TYPE_N_BASECLASSES (type
) = read_huge_number (pp
, ',', &nbits
, 0);
3101 /* Some stupid compilers have trouble with the following, so break
3102 it up into simpler expressions. */
3103 TYPE_FIELD_VIRTUAL_BITS (type
) = (B_TYPE
*)
3104 TYPE_ALLOC (type
, B_BYTES (TYPE_N_BASECLASSES (type
)));
3107 int num_bytes
= B_BYTES (TYPE_N_BASECLASSES (type
));
3110 pointer
= (char *) TYPE_ALLOC (type
, num_bytes
);
3111 TYPE_FIELD_VIRTUAL_BITS (type
) = (B_TYPE
*) pointer
;
3115 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type
), TYPE_N_BASECLASSES (type
));
3117 for (i
= 0; i
< TYPE_N_BASECLASSES (type
); i
++)
3119 newobj
= OBSTACK_ZALLOC (&fip
->obstack
, struct nextfield
);
3121 newobj
->next
= fip
->list
;
3123 FIELD_BITSIZE (newobj
->field
) = 0; /* This should be an unpacked
3126 STABS_CONTINUE (pp
, objfile
);
3130 /* Nothing to do. */
3133 SET_TYPE_FIELD_VIRTUAL (type
, i
);
3136 /* Unknown character. Complain and treat it as non-virtual. */
3138 complaint (_("Unknown virtual character `%c' for baseclass"),
3144 newobj
->visibility
= *(*pp
)++;
3145 switch (newobj
->visibility
)
3147 case VISIBILITY_PRIVATE
:
3148 case VISIBILITY_PROTECTED
:
3149 case VISIBILITY_PUBLIC
:
3152 /* Bad visibility format. Complain and treat it as
3155 complaint (_("Unknown visibility `%c' for baseclass"),
3156 newobj
->visibility
);
3157 newobj
->visibility
= VISIBILITY_PUBLIC
;
3164 /* The remaining value is the bit offset of the portion of the object
3165 corresponding to this baseclass. Always zero in the absence of
3166 multiple inheritance. */
3168 SET_FIELD_BITPOS (newobj
->field
, read_huge_number (pp
, ',', &nbits
, 0));
3173 /* The last piece of baseclass information is the type of the
3174 base class. Read it, and remember it's type name as this
3177 newobj
->field
.type
= read_type (pp
, objfile
);
3178 newobj
->field
.name
= TYPE_NAME (newobj
->field
.type
);
3180 /* Skip trailing ';' and bump count of number of fields seen. */
3189 /* The tail end of stabs for C++ classes that contain a virtual function
3190 pointer contains a tilde, a %, and a type number.
3191 The type number refers to the base class (possibly this class itself) which
3192 contains the vtable pointer for the current class.
3194 This function is called when we have parsed all the method declarations,
3195 so we can look for the vptr base class info. */
3198 read_tilde_fields (struct stab_field_info
*fip
, const char **pp
,
3199 struct type
*type
, struct objfile
*objfile
)
3203 STABS_CONTINUE (pp
, objfile
);
3205 /* If we are positioned at a ';', then skip it. */
3215 if (**pp
== '=' || **pp
== '+' || **pp
== '-')
3217 /* Obsolete flags that used to indicate the presence
3218 of constructors and/or destructors. */
3222 /* Read either a '%' or the final ';'. */
3223 if (*(*pp
)++ == '%')
3225 /* The next number is the type number of the base class
3226 (possibly our own class) which supplies the vtable for
3227 this class. Parse it out, and search that class to find
3228 its vtable pointer, and install those into TYPE_VPTR_BASETYPE
3229 and TYPE_VPTR_FIELDNO. */
3234 t
= read_type (pp
, objfile
);
3236 while (*p
!= '\0' && *p
!= ';')
3242 /* Premature end of symbol. */
3246 set_type_vptr_basetype (type
, t
);
3247 if (type
== t
) /* Our own class provides vtbl ptr. */
3249 for (i
= TYPE_NFIELDS (t
) - 1;
3250 i
>= TYPE_N_BASECLASSES (t
);
3253 const char *name
= TYPE_FIELD_NAME (t
, i
);
3255 if (!strncmp (name
, vptr_name
, sizeof (vptr_name
) - 2)
3256 && is_cplus_marker (name
[sizeof (vptr_name
) - 2]))
3258 set_type_vptr_fieldno (type
, i
);
3262 /* Virtual function table field not found. */
3263 complaint (_("virtual function table pointer "
3264 "not found when defining class `%s'"),
3270 set_type_vptr_fieldno (type
, TYPE_VPTR_FIELDNO (t
));
3281 attach_fn_fields_to_type (struct stab_field_info
*fip
, struct type
*type
)
3285 for (n
= TYPE_NFN_FIELDS (type
);
3286 fip
->fnlist
!= NULL
;
3287 fip
->fnlist
= fip
->fnlist
->next
)
3289 --n
; /* Circumvent Sun3 compiler bug. */
3290 TYPE_FN_FIELDLISTS (type
)[n
] = fip
->fnlist
->fn_fieldlist
;
3295 /* Create the vector of fields, and record how big it is.
3296 We need this info to record proper virtual function table information
3297 for this class's virtual functions. */
3300 attach_fields_to_type (struct stab_field_info
*fip
, struct type
*type
,
3301 struct objfile
*objfile
)
3304 int non_public_fields
= 0;
3305 struct nextfield
*scan
;
3307 /* Count up the number of fields that we have, as well as taking note of
3308 whether or not there are any non-public fields, which requires us to
3309 allocate and build the private_field_bits and protected_field_bits
3312 for (scan
= fip
->list
; scan
!= NULL
; scan
= scan
->next
)
3315 if (scan
->visibility
!= VISIBILITY_PUBLIC
)
3317 non_public_fields
++;
3321 /* Now we know how many fields there are, and whether or not there are any
3322 non-public fields. Record the field count, allocate space for the
3323 array of fields, and create blank visibility bitfields if necessary. */
3325 TYPE_NFIELDS (type
) = nfields
;
3326 TYPE_FIELDS (type
) = (struct field
*)
3327 TYPE_ALLOC (type
, sizeof (struct field
) * nfields
);
3328 memset (TYPE_FIELDS (type
), 0, sizeof (struct field
) * nfields
);
3330 if (non_public_fields
)
3332 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
3334 TYPE_FIELD_PRIVATE_BITS (type
) =
3335 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
3336 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type
), nfields
);
3338 TYPE_FIELD_PROTECTED_BITS (type
) =
3339 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
3340 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type
), nfields
);
3342 TYPE_FIELD_IGNORE_BITS (type
) =
3343 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
3344 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type
), nfields
);
3347 /* Copy the saved-up fields into the field vector. Start from the
3348 head of the list, adding to the tail of the field array, so that
3349 they end up in the same order in the array in which they were
3350 added to the list. */
3352 while (nfields
-- > 0)
3354 TYPE_FIELD (type
, nfields
) = fip
->list
->field
;
3355 switch (fip
->list
->visibility
)
3357 case VISIBILITY_PRIVATE
:
3358 SET_TYPE_FIELD_PRIVATE (type
, nfields
);
3361 case VISIBILITY_PROTECTED
:
3362 SET_TYPE_FIELD_PROTECTED (type
, nfields
);
3365 case VISIBILITY_IGNORE
:
3366 SET_TYPE_FIELD_IGNORE (type
, nfields
);
3369 case VISIBILITY_PUBLIC
:
3373 /* Unknown visibility. Complain and treat it as public. */
3375 complaint (_("Unknown visibility `%c' for field"),
3376 fip
->list
->visibility
);
3380 fip
->list
= fip
->list
->next
;
3386 /* Complain that the compiler has emitted more than one definition for the
3387 structure type TYPE. */
3389 complain_about_struct_wipeout (struct type
*type
)
3391 const char *name
= "";
3392 const char *kind
= "";
3394 if (TYPE_NAME (type
))
3396 name
= TYPE_NAME (type
);
3397 switch (TYPE_CODE (type
))
3399 case TYPE_CODE_STRUCT
: kind
= "struct "; break;
3400 case TYPE_CODE_UNION
: kind
= "union "; break;
3401 case TYPE_CODE_ENUM
: kind
= "enum "; break;
3411 complaint (_("struct/union type gets multiply defined: %s%s"), kind
, name
);
3414 /* Set the length for all variants of a same main_type, which are
3415 connected in the closed chain.
3417 This is something that needs to be done when a type is defined *after*
3418 some cross references to this type have already been read. Consider
3419 for instance the following scenario where we have the following two
3422 .stabs "t:p(0,21)=*(0,22)=k(0,23)=xsdummy:",160,0,28,-24
3423 .stabs "dummy:T(0,23)=s16x:(0,1),0,3[...]"
3425 A stubbed version of type dummy is created while processing the first
3426 stabs entry. The length of that type is initially set to zero, since
3427 it is unknown at this point. Also, a "constant" variation of type
3428 "dummy" is created as well (this is the "(0,22)=k(0,23)" section of
3431 The second stabs entry allows us to replace the stubbed definition
3432 with the real definition. However, we still need to adjust the length
3433 of the "constant" variation of that type, as its length was left
3434 untouched during the main type replacement... */
3437 set_length_in_type_chain (struct type
*type
)
3439 struct type
*ntype
= TYPE_CHAIN (type
);
3441 while (ntype
!= type
)
3443 if (TYPE_LENGTH(ntype
) == 0)
3444 TYPE_LENGTH (ntype
) = TYPE_LENGTH (type
);
3446 complain_about_struct_wipeout (ntype
);
3447 ntype
= TYPE_CHAIN (ntype
);
3451 /* Read the description of a structure (or union type) and return an object
3452 describing the type.
3454 PP points to a character pointer that points to the next unconsumed token
3455 in the stabs string. For example, given stabs "A:T4=s4a:1,0,32;;",
3456 *PP will point to "4a:1,0,32;;".
3458 TYPE points to an incomplete type that needs to be filled in.
3460 OBJFILE points to the current objfile from which the stabs information is
3461 being read. (Note that it is redundant in that TYPE also contains a pointer
3462 to this same objfile, so it might be a good idea to eliminate it. FIXME).
3465 static struct type
*
3466 read_struct_type (const char **pp
, struct type
*type
, enum type_code type_code
,
3467 struct objfile
*objfile
)
3469 struct stab_field_info fi
;
3471 /* When describing struct/union/class types in stabs, G++ always drops
3472 all qualifications from the name. So if you've got:
3473 struct A { ... struct B { ... }; ... };
3474 then G++ will emit stabs for `struct A::B' that call it simply
3475 `struct B'. Obviously, if you've got a real top-level definition for
3476 `struct B', or other nested definitions, this is going to cause
3479 Obviously, GDB can't fix this by itself, but it can at least avoid
3480 scribbling on existing structure type objects when new definitions
3482 if (! (TYPE_CODE (type
) == TYPE_CODE_UNDEF
3483 || TYPE_STUB (type
)))
3485 complain_about_struct_wipeout (type
);
3487 /* It's probably best to return the type unchanged. */
3491 INIT_CPLUS_SPECIFIC (type
);
3492 TYPE_CODE (type
) = type_code
;
3493 TYPE_STUB (type
) = 0;
3495 /* First comes the total size in bytes. */
3500 TYPE_LENGTH (type
) = read_huge_number (pp
, 0, &nbits
, 0);
3502 return error_type (pp
, objfile
);
3503 set_length_in_type_chain (type
);
3506 /* Now read the baseclasses, if any, read the regular C struct or C++
3507 class member fields, attach the fields to the type, read the C++
3508 member functions, attach them to the type, and then read any tilde
3509 field (baseclass specifier for the class holding the main vtable). */
3511 if (!read_baseclasses (&fi
, pp
, type
, objfile
)
3512 || !read_struct_fields (&fi
, pp
, type
, objfile
)
3513 || !attach_fields_to_type (&fi
, type
, objfile
)
3514 || !read_member_functions (&fi
, pp
, type
, objfile
)
3515 || !attach_fn_fields_to_type (&fi
, type
)
3516 || !read_tilde_fields (&fi
, pp
, type
, objfile
))
3518 type
= error_type (pp
, objfile
);
3524 /* Read a definition of an array type,
3525 and create and return a suitable type object.
3526 Also creates a range type which represents the bounds of that
3529 static struct type
*
3530 read_array_type (const char **pp
, struct type
*type
,
3531 struct objfile
*objfile
)
3533 struct type
*index_type
, *element_type
, *range_type
;
3538 /* Format of an array type:
3539 "ar<index type>;lower;upper;<array_contents_type>".
3540 OS9000: "arlower,upper;<array_contents_type>".
3542 Fortran adjustable arrays use Adigits or Tdigits for lower or upper;
3543 for these, produce a type like float[][]. */
3546 index_type
= read_type (pp
, objfile
);
3548 /* Improper format of array type decl. */
3549 return error_type (pp
, objfile
);
3553 if (!(**pp
>= '0' && **pp
<= '9') && **pp
!= '-')
3558 lower
= read_huge_number (pp
, ';', &nbits
, 0);
3561 return error_type (pp
, objfile
);
3563 if (!(**pp
>= '0' && **pp
<= '9') && **pp
!= '-')
3568 upper
= read_huge_number (pp
, ';', &nbits
, 0);
3570 return error_type (pp
, objfile
);
3572 element_type
= read_type (pp
, objfile
);
3581 create_static_range_type (NULL
, index_type
, lower
, upper
);
3582 type
= create_array_type (type
, element_type
, range_type
);
3588 /* Read a definition of an enumeration type,
3589 and create and return a suitable type object.
3590 Also defines the symbols that represent the values of the type. */
3592 static struct type
*
3593 read_enum_type (const char **pp
, struct type
*type
,
3594 struct objfile
*objfile
)
3596 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
3602 struct pending
**symlist
;
3603 struct pending
*osyms
, *syms
;
3606 int unsigned_enum
= 1;
3609 /* FIXME! The stabs produced by Sun CC merrily define things that ought
3610 to be file-scope, between N_FN entries, using N_LSYM. What's a mother
3611 to do? For now, force all enum values to file scope. */
3612 if (within_function
)
3613 symlist
= get_local_symbols ();
3616 symlist
= get_file_symbols ();
3618 o_nsyms
= osyms
? osyms
->nsyms
: 0;
3620 /* The aix4 compiler emits an extra field before the enum members;
3621 my guess is it's a type of some sort. Just ignore it. */
3624 /* Skip over the type. */
3628 /* Skip over the colon. */
3632 /* Read the value-names and their values.
3633 The input syntax is NAME:VALUE,NAME:VALUE, and so on.
3634 A semicolon or comma instead of a NAME means the end. */
3635 while (**pp
&& **pp
!= ';' && **pp
!= ',')
3637 STABS_CONTINUE (pp
, objfile
);
3641 name
= obstack_strndup (&objfile
->objfile_obstack
, *pp
, p
- *pp
);
3643 n
= read_huge_number (pp
, ',', &nbits
, 0);
3645 return error_type (pp
, objfile
);
3647 sym
= allocate_symbol (objfile
);
3648 SYMBOL_SET_LINKAGE_NAME (sym
, name
);
3649 SYMBOL_SET_LANGUAGE (sym
, get_current_subfile ()->language
,
3650 &objfile
->objfile_obstack
);
3651 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST
;
3652 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
3653 SYMBOL_VALUE (sym
) = n
;
3656 add_symbol_to_list (sym
, symlist
);
3661 (*pp
)++; /* Skip the semicolon. */
3663 /* Now fill in the fields of the type-structure. */
3665 TYPE_LENGTH (type
) = gdbarch_int_bit (gdbarch
) / HOST_CHAR_BIT
;
3666 set_length_in_type_chain (type
);
3667 TYPE_CODE (type
) = TYPE_CODE_ENUM
;
3668 TYPE_STUB (type
) = 0;
3670 TYPE_UNSIGNED (type
) = 1;
3671 TYPE_NFIELDS (type
) = nsyms
;
3672 TYPE_FIELDS (type
) = (struct field
*)
3673 TYPE_ALLOC (type
, sizeof (struct field
) * nsyms
);
3674 memset (TYPE_FIELDS (type
), 0, sizeof (struct field
) * nsyms
);
3676 /* Find the symbols for the values and put them into the type.
3677 The symbols can be found in the symlist that we put them on
3678 to cause them to be defined. osyms contains the old value
3679 of that symlist; everything up to there was defined by us. */
3680 /* Note that we preserve the order of the enum constants, so
3681 that in something like "enum {FOO, LAST_THING=FOO}" we print
3682 FOO, not LAST_THING. */
3684 for (syms
= *symlist
, n
= nsyms
- 1; syms
; syms
= syms
->next
)
3686 int last
= syms
== osyms
? o_nsyms
: 0;
3687 int j
= syms
->nsyms
;
3689 for (; --j
>= last
; --n
)
3691 struct symbol
*xsym
= syms
->symbol
[j
];
3693 SYMBOL_TYPE (xsym
) = type
;
3694 TYPE_FIELD_NAME (type
, n
) = SYMBOL_LINKAGE_NAME (xsym
);
3695 SET_FIELD_ENUMVAL (TYPE_FIELD (type
, n
), SYMBOL_VALUE (xsym
));
3696 TYPE_FIELD_BITSIZE (type
, n
) = 0;
3705 /* Sun's ACC uses a somewhat saner method for specifying the builtin
3706 typedefs in every file (for int, long, etc):
3708 type = b <signed> <width> <format type>; <offset>; <nbits>
3710 optional format type = c or b for char or boolean.
3711 offset = offset from high order bit to start bit of type.
3712 width is # bytes in object of this type, nbits is # bits in type.
3714 The width/offset stuff appears to be for small objects stored in
3715 larger ones (e.g. `shorts' in `int' registers). We ignore it for now,
3718 static struct type
*
3719 read_sun_builtin_type (const char **pp
, int typenums
[2], struct objfile
*objfile
)
3724 int boolean_type
= 0;
3735 return error_type (pp
, objfile
);
3739 /* For some odd reason, all forms of char put a c here. This is strange
3740 because no other type has this honor. We can safely ignore this because
3741 we actually determine 'char'acterness by the number of bits specified in
3743 Boolean forms, e.g Fortran logical*X, put a b here. */
3747 else if (**pp
== 'b')
3753 /* The first number appears to be the number of bytes occupied
3754 by this type, except that unsigned short is 4 instead of 2.
3755 Since this information is redundant with the third number,
3756 we will ignore it. */
3757 read_huge_number (pp
, ';', &nbits
, 0);
3759 return error_type (pp
, objfile
);
3761 /* The second number is always 0, so ignore it too. */
3762 read_huge_number (pp
, ';', &nbits
, 0);
3764 return error_type (pp
, objfile
);
3766 /* The third number is the number of bits for this type. */
3767 type_bits
= read_huge_number (pp
, 0, &nbits
, 0);
3769 return error_type (pp
, objfile
);
3770 /* The type *should* end with a semicolon. If it are embedded
3771 in a larger type the semicolon may be the only way to know where
3772 the type ends. If this type is at the end of the stabstring we
3773 can deal with the omitted semicolon (but we don't have to like
3774 it). Don't bother to complain(), Sun's compiler omits the semicolon
3781 struct type
*type
= init_type (objfile
, TYPE_CODE_VOID
,
3782 TARGET_CHAR_BIT
, NULL
);
3784 TYPE_UNSIGNED (type
) = 1;
3789 return init_boolean_type (objfile
, type_bits
, unsigned_type
, NULL
);
3791 return init_integer_type (objfile
, type_bits
, unsigned_type
, NULL
);
3794 static struct type
*
3795 read_sun_floating_type (const char **pp
, int typenums
[2],
3796 struct objfile
*objfile
)
3801 struct type
*rettype
;
3803 /* The first number has more details about the type, for example
3805 details
= read_huge_number (pp
, ';', &nbits
, 0);
3807 return error_type (pp
, objfile
);
3809 /* The second number is the number of bytes occupied by this type. */
3810 nbytes
= read_huge_number (pp
, ';', &nbits
, 0);
3812 return error_type (pp
, objfile
);
3814 nbits
= nbytes
* TARGET_CHAR_BIT
;
3816 if (details
== NF_COMPLEX
|| details
== NF_COMPLEX16
3817 || details
== NF_COMPLEX32
)
3819 rettype
= dbx_init_float_type (objfile
, nbits
/ 2);
3820 return init_complex_type (objfile
, NULL
, rettype
);
3823 return dbx_init_float_type (objfile
, nbits
);
3826 /* Read a number from the string pointed to by *PP.
3827 The value of *PP is advanced over the number.
3828 If END is nonzero, the character that ends the
3829 number must match END, or an error happens;
3830 and that character is skipped if it does match.
3831 If END is zero, *PP is left pointing to that character.
3833 If TWOS_COMPLEMENT_BITS is set to a strictly positive value and if
3834 the number is represented in an octal representation, assume that
3835 it is represented in a 2's complement representation with a size of
3836 TWOS_COMPLEMENT_BITS.
3838 If the number fits in a long, set *BITS to 0 and return the value.
3839 If not, set *BITS to be the number of bits in the number and return 0.
3841 If encounter garbage, set *BITS to -1 and return 0. */
3844 read_huge_number (const char **pp
, int end
, int *bits
,
3845 int twos_complement_bits
)
3847 const char *p
= *pp
;
3856 int twos_complement_representation
= 0;
3864 /* Leading zero means octal. GCC uses this to output values larger
3865 than an int (because that would be hard in decimal). */
3872 /* Skip extra zeros. */
3876 if (sign
> 0 && radix
== 8 && twos_complement_bits
> 0)
3878 /* Octal, possibly signed. Check if we have enough chars for a
3884 while ((c
= *p1
) >= '0' && c
< '8')
3888 if (len
> twos_complement_bits
/ 3
3889 || (twos_complement_bits
% 3 == 0
3890 && len
== twos_complement_bits
/ 3))
3892 /* Ok, we have enough characters for a signed value, check
3893 for signness by testing if the sign bit is set. */
3894 sign_bit
= (twos_complement_bits
% 3 + 2) % 3;
3896 if (c
& (1 << sign_bit
))
3898 /* Definitely signed. */
3899 twos_complement_representation
= 1;
3905 upper_limit
= LONG_MAX
/ radix
;
3907 while ((c
= *p
++) >= '0' && c
< ('0' + radix
))
3909 if (n
<= upper_limit
)
3911 if (twos_complement_representation
)
3913 /* Octal, signed, twos complement representation. In
3914 this case, n is the corresponding absolute value. */
3917 long sn
= c
- '0' - ((2 * (c
- '0')) | (2 << sign_bit
));
3929 /* unsigned representation */
3931 n
+= c
- '0'; /* FIXME this overflows anyway. */
3937 /* This depends on large values being output in octal, which is
3944 /* Ignore leading zeroes. */
3948 else if (c
== '2' || c
== '3')
3969 if (radix
== 8 && twos_complement_bits
> 0 && nbits
> twos_complement_bits
)
3971 /* We were supposed to parse a number with maximum
3972 TWOS_COMPLEMENT_BITS bits, but something went wrong. */
3983 /* Large decimal constants are an error (because it is hard to
3984 count how many bits are in them). */
3990 /* -0x7f is the same as 0x80. So deal with it by adding one to
3991 the number of bits. Two's complement represention octals
3992 can't have a '-' in front. */
3993 if (sign
== -1 && !twos_complement_representation
)
4004 /* It's *BITS which has the interesting information. */
4008 static struct type
*
4009 read_range_type (const char **pp
, int typenums
[2], int type_size
,
4010 struct objfile
*objfile
)
4012 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
4013 const char *orig_pp
= *pp
;
4018 struct type
*result_type
;
4019 struct type
*index_type
= NULL
;
4021 /* First comes a type we are a subrange of.
4022 In C it is usually 0, 1 or the type being defined. */
4023 if (read_type_number (pp
, rangenums
) != 0)
4024 return error_type (pp
, objfile
);
4025 self_subrange
= (rangenums
[0] == typenums
[0] &&
4026 rangenums
[1] == typenums
[1]);
4031 index_type
= read_type (pp
, objfile
);
4034 /* A semicolon should now follow; skip it. */
4038 /* The remaining two operands are usually lower and upper bounds
4039 of the range. But in some special cases they mean something else. */
4040 n2
= read_huge_number (pp
, ';', &n2bits
, type_size
);
4041 n3
= read_huge_number (pp
, ';', &n3bits
, type_size
);
4043 if (n2bits
== -1 || n3bits
== -1)
4044 return error_type (pp
, objfile
);
4047 goto handle_true_range
;
4049 /* If limits are huge, must be large integral type. */
4050 if (n2bits
!= 0 || n3bits
!= 0)
4052 char got_signed
= 0;
4053 char got_unsigned
= 0;
4054 /* Number of bits in the type. */
4057 /* If a type size attribute has been specified, the bounds of
4058 the range should fit in this size. If the lower bounds needs
4059 more bits than the upper bound, then the type is signed. */
4060 if (n2bits
<= type_size
&& n3bits
<= type_size
)
4062 if (n2bits
== type_size
&& n2bits
> n3bits
)
4068 /* Range from 0 to <large number> is an unsigned large integral type. */
4069 else if ((n2bits
== 0 && n2
== 0) && n3bits
!= 0)
4074 /* Range from <large number> to <large number>-1 is a large signed
4075 integral type. Take care of the case where <large number> doesn't
4076 fit in a long but <large number>-1 does. */
4077 else if ((n2bits
!= 0 && n3bits
!= 0 && n2bits
== n3bits
+ 1)
4078 || (n2bits
!= 0 && n3bits
== 0
4079 && (n2bits
== sizeof (long) * HOST_CHAR_BIT
)
4086 if (got_signed
|| got_unsigned
)
4087 return init_integer_type (objfile
, nbits
, got_unsigned
, NULL
);
4089 return error_type (pp
, objfile
);
4092 /* A type defined as a subrange of itself, with bounds both 0, is void. */
4093 if (self_subrange
&& n2
== 0 && n3
== 0)
4094 return init_type (objfile
, TYPE_CODE_VOID
, TARGET_CHAR_BIT
, NULL
);
4096 /* If n3 is zero and n2 is positive, we want a floating type, and n2
4097 is the width in bytes.
4099 Fortran programs appear to use this for complex types also. To
4100 distinguish between floats and complex, g77 (and others?) seem
4101 to use self-subranges for the complexes, and subranges of int for
4104 Also note that for complexes, g77 sets n2 to the size of one of
4105 the member floats, not the whole complex beast. My guess is that
4106 this was to work well with pre-COMPLEX versions of gdb. */
4108 if (n3
== 0 && n2
> 0)
4110 struct type
*float_type
4111 = dbx_init_float_type (objfile
, n2
* TARGET_CHAR_BIT
);
4114 return init_complex_type (objfile
, NULL
, float_type
);
4119 /* If the upper bound is -1, it must really be an unsigned integral. */
4121 else if (n2
== 0 && n3
== -1)
4123 int bits
= type_size
;
4127 /* We don't know its size. It is unsigned int or unsigned
4128 long. GCC 2.3.3 uses this for long long too, but that is
4129 just a GDB 3.5 compatibility hack. */
4130 bits
= gdbarch_int_bit (gdbarch
);
4133 return init_integer_type (objfile
, bits
, 1, NULL
);
4136 /* Special case: char is defined (Who knows why) as a subrange of
4137 itself with range 0-127. */
4138 else if (self_subrange
&& n2
== 0 && n3
== 127)
4140 struct type
*type
= init_integer_type (objfile
, TARGET_CHAR_BIT
,
4142 TYPE_NOSIGN (type
) = 1;
4145 /* We used to do this only for subrange of self or subrange of int. */
4148 /* -1 is used for the upper bound of (4 byte) "unsigned int" and
4149 "unsigned long", and we already checked for that,
4150 so don't need to test for it here. */
4153 /* n3 actually gives the size. */
4154 return init_integer_type (objfile
, -n3
* TARGET_CHAR_BIT
, 1, NULL
);
4156 /* Is n3 == 2**(8n)-1 for some integer n? Then it's an
4157 unsigned n-byte integer. But do require n to be a power of
4158 two; we don't want 3- and 5-byte integers flying around. */
4164 for (bytes
= 0; (bits
& 0xff) == 0xff; bytes
++)
4167 && ((bytes
- 1) & bytes
) == 0) /* "bytes is a power of two" */
4168 return init_integer_type (objfile
, bytes
* TARGET_CHAR_BIT
, 1, NULL
);
4171 /* I think this is for Convex "long long". Since I don't know whether
4172 Convex sets self_subrange, I also accept that particular size regardless
4173 of self_subrange. */
4174 else if (n3
== 0 && n2
< 0
4176 || n2
== -gdbarch_long_long_bit
4177 (gdbarch
) / TARGET_CHAR_BIT
))
4178 return init_integer_type (objfile
, -n2
* TARGET_CHAR_BIT
, 0, NULL
);
4179 else if (n2
== -n3
- 1)
4182 return init_integer_type (objfile
, 8, 0, NULL
);
4184 return init_integer_type (objfile
, 16, 0, NULL
);
4185 if (n3
== 0x7fffffff)
4186 return init_integer_type (objfile
, 32, 0, NULL
);
4189 /* We have a real range type on our hands. Allocate space and
4190 return a real pointer. */
4194 index_type
= objfile_type (objfile
)->builtin_int
;
4196 index_type
= *dbx_lookup_type (rangenums
, objfile
);
4197 if (index_type
== NULL
)
4199 /* Does this actually ever happen? Is that why we are worrying
4200 about dealing with it rather than just calling error_type? */
4202 complaint (_("base type %d of range type is not defined"), rangenums
[1]);
4204 index_type
= objfile_type (objfile
)->builtin_int
;
4208 = create_static_range_type (NULL
, index_type
, n2
, n3
);
4209 return (result_type
);
4212 /* Read in an argument list. This is a list of types, separated by commas
4213 and terminated with END. Return the list of types read in, or NULL
4214 if there is an error. */
4216 static struct field
*
4217 read_args (const char **pp
, int end
, struct objfile
*objfile
, int *nargsp
,
4220 /* FIXME! Remove this arbitrary limit! */
4221 struct type
*types
[1024]; /* Allow for fns of 1023 parameters. */
4228 /* Invalid argument list: no ','. */
4231 STABS_CONTINUE (pp
, objfile
);
4232 types
[n
++] = read_type (pp
, objfile
);
4234 (*pp
)++; /* get past `end' (the ':' character). */
4238 /* We should read at least the THIS parameter here. Some broken stabs
4239 output contained `(0,41),(0,42)=@s8;-16;,(0,43),(0,1);' where should
4240 have been present ";-16,(0,43)" reference instead. This way the
4241 excessive ";" marker prematurely stops the parameters parsing. */
4243 complaint (_("Invalid (empty) method arguments"));
4246 else if (TYPE_CODE (types
[n
- 1]) != TYPE_CODE_VOID
)
4254 rval
= XCNEWVEC (struct field
, n
);
4255 for (i
= 0; i
< n
; i
++)
4256 rval
[i
].type
= types
[i
];
4261 /* Common block handling. */
4263 /* List of symbols declared since the last BCOMM. This list is a tail
4264 of local_symbols. When ECOMM is seen, the symbols on the list
4265 are noted so their proper addresses can be filled in later,
4266 using the common block base address gotten from the assembler
4269 static struct pending
*common_block
;
4270 static int common_block_i
;
4272 /* Name of the current common block. We get it from the BCOMM instead of the
4273 ECOMM to match IBM documentation (even though IBM puts the name both places
4274 like everyone else). */
4275 static char *common_block_name
;
4277 /* Process a N_BCOMM symbol. The storage for NAME is not guaranteed
4278 to remain after this function returns. */
4281 common_block_start (const char *name
, struct objfile
*objfile
)
4283 if (common_block_name
!= NULL
)
4285 complaint (_("Invalid symbol data: common block within common block"));
4287 common_block
= *get_local_symbols ();
4288 common_block_i
= common_block
? common_block
->nsyms
: 0;
4289 common_block_name
= obstack_strdup (&objfile
->objfile_obstack
, name
);
4292 /* Process a N_ECOMM symbol. */
4295 common_block_end (struct objfile
*objfile
)
4297 /* Symbols declared since the BCOMM are to have the common block
4298 start address added in when we know it. common_block and
4299 common_block_i point to the first symbol after the BCOMM in
4300 the local_symbols list; copy the list and hang it off the
4301 symbol for the common block name for later fixup. */
4304 struct pending
*newobj
= 0;
4305 struct pending
*next
;
4308 if (common_block_name
== NULL
)
4310 complaint (_("ECOMM symbol unmatched by BCOMM"));
4314 sym
= allocate_symbol (objfile
);
4315 /* Note: common_block_name already saved on objfile_obstack. */
4316 SYMBOL_SET_LINKAGE_NAME (sym
, common_block_name
);
4317 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
4319 /* Now we copy all the symbols which have been defined since the BCOMM. */
4321 /* Copy all the struct pendings before common_block. */
4322 for (next
= *get_local_symbols ();
4323 next
!= NULL
&& next
!= common_block
;
4326 for (j
= 0; j
< next
->nsyms
; j
++)
4327 add_symbol_to_list (next
->symbol
[j
], &newobj
);
4330 /* Copy however much of COMMON_BLOCK we need. If COMMON_BLOCK is
4331 NULL, it means copy all the local symbols (which we already did
4334 if (common_block
!= NULL
)
4335 for (j
= common_block_i
; j
< common_block
->nsyms
; j
++)
4336 add_symbol_to_list (common_block
->symbol
[j
], &newobj
);
4338 SYMBOL_TYPE (sym
) = (struct type
*) newobj
;
4340 /* Should we be putting local_symbols back to what it was?
4343 i
= hashname (SYMBOL_LINKAGE_NAME (sym
));
4344 SYMBOL_VALUE_CHAIN (sym
) = global_sym_chain
[i
];
4345 global_sym_chain
[i
] = sym
;
4346 common_block_name
= NULL
;
4349 /* Add a common block's start address to the offset of each symbol
4350 declared to be in it (by being between a BCOMM/ECOMM pair that uses
4351 the common block name). */
4354 fix_common_block (struct symbol
*sym
, CORE_ADDR valu
)
4356 struct pending
*next
= (struct pending
*) SYMBOL_TYPE (sym
);
4358 for (; next
; next
= next
->next
)
4362 for (j
= next
->nsyms
- 1; j
>= 0; j
--)
4363 SET_SYMBOL_VALUE_ADDRESS (next
->symbol
[j
],
4364 SYMBOL_VALUE_ADDRESS (next
->symbol
[j
])
4371 /* Add {TYPE, TYPENUMS} to the NONAME_UNDEFS vector.
4372 See add_undefined_type for more details. */
4375 add_undefined_type_noname (struct type
*type
, int typenums
[2])
4379 nat
.typenums
[0] = typenums
[0];
4380 nat
.typenums
[1] = typenums
[1];
4383 if (noname_undefs_length
== noname_undefs_allocated
)
4385 noname_undefs_allocated
*= 2;
4386 noname_undefs
= (struct nat
*)
4387 xrealloc ((char *) noname_undefs
,
4388 noname_undefs_allocated
* sizeof (struct nat
));
4390 noname_undefs
[noname_undefs_length
++] = nat
;
4393 /* Add TYPE to the UNDEF_TYPES vector.
4394 See add_undefined_type for more details. */
4397 add_undefined_type_1 (struct type
*type
)
4399 if (undef_types_length
== undef_types_allocated
)
4401 undef_types_allocated
*= 2;
4402 undef_types
= (struct type
**)
4403 xrealloc ((char *) undef_types
,
4404 undef_types_allocated
* sizeof (struct type
*));
4406 undef_types
[undef_types_length
++] = type
;
4409 /* What about types defined as forward references inside of a small lexical
4411 /* Add a type to the list of undefined types to be checked through
4412 once this file has been read in.
4414 In practice, we actually maintain two such lists: The first list
4415 (UNDEF_TYPES) is used for types whose name has been provided, and
4416 concerns forward references (eg 'xs' or 'xu' forward references);
4417 the second list (NONAME_UNDEFS) is used for types whose name is
4418 unknown at creation time, because they were referenced through
4419 their type number before the actual type was declared.
4420 This function actually adds the given type to the proper list. */
4423 add_undefined_type (struct type
*type
, int typenums
[2])
4425 if (TYPE_NAME (type
) == NULL
)
4426 add_undefined_type_noname (type
, typenums
);
4428 add_undefined_type_1 (type
);
4431 /* Try to fix all undefined types pushed on the UNDEF_TYPES vector. */
4434 cleanup_undefined_types_noname (struct objfile
*objfile
)
4438 for (i
= 0; i
< noname_undefs_length
; i
++)
4440 struct nat nat
= noname_undefs
[i
];
4443 type
= dbx_lookup_type (nat
.typenums
, objfile
);
4444 if (nat
.type
!= *type
&& TYPE_CODE (*type
) != TYPE_CODE_UNDEF
)
4446 /* The instance flags of the undefined type are still unset,
4447 and needs to be copied over from the reference type.
4448 Since replace_type expects them to be identical, we need
4449 to set these flags manually before hand. */
4450 TYPE_INSTANCE_FLAGS (nat
.type
) = TYPE_INSTANCE_FLAGS (*type
);
4451 replace_type (nat
.type
, *type
);
4455 noname_undefs_length
= 0;
4458 /* Go through each undefined type, see if it's still undefined, and fix it
4459 up if possible. We have two kinds of undefined types:
4461 TYPE_CODE_ARRAY: Array whose target type wasn't defined yet.
4462 Fix: update array length using the element bounds
4463 and the target type's length.
4464 TYPE_CODE_STRUCT, TYPE_CODE_UNION: Structure whose fields were not
4465 yet defined at the time a pointer to it was made.
4466 Fix: Do a full lookup on the struct/union tag. */
4469 cleanup_undefined_types_1 (void)
4473 /* Iterate over every undefined type, and look for a symbol whose type
4474 matches our undefined type. The symbol matches if:
4475 1. It is a typedef in the STRUCT domain;
4476 2. It has the same name, and same type code;
4477 3. The instance flags are identical.
4479 It is important to check the instance flags, because we have seen
4480 examples where the debug info contained definitions such as:
4482 "foo_t:t30=B31=xefoo_t:"
4484 In this case, we have created an undefined type named "foo_t" whose
4485 instance flags is null (when processing "xefoo_t"), and then created
4486 another type with the same name, but with different instance flags
4487 ('B' means volatile). I think that the definition above is wrong,
4488 since the same type cannot be volatile and non-volatile at the same
4489 time, but we need to be able to cope with it when it happens. The
4490 approach taken here is to treat these two types as different. */
4492 for (type
= undef_types
; type
< undef_types
+ undef_types_length
; type
++)
4494 switch (TYPE_CODE (*type
))
4497 case TYPE_CODE_STRUCT
:
4498 case TYPE_CODE_UNION
:
4499 case TYPE_CODE_ENUM
:
4501 /* Check if it has been defined since. Need to do this here
4502 as well as in check_typedef to deal with the (legitimate in
4503 C though not C++) case of several types with the same name
4504 in different source files. */
4505 if (TYPE_STUB (*type
))
4507 struct pending
*ppt
;
4509 /* Name of the type, without "struct" or "union". */
4510 const char *type_name
= TYPE_NAME (*type
);
4512 if (type_name
== NULL
)
4514 complaint (_("need a type name"));
4517 for (ppt
= *get_file_symbols (); ppt
; ppt
= ppt
->next
)
4519 for (i
= 0; i
< ppt
->nsyms
; i
++)
4521 struct symbol
*sym
= ppt
->symbol
[i
];
4523 if (SYMBOL_CLASS (sym
) == LOC_TYPEDEF
4524 && SYMBOL_DOMAIN (sym
) == STRUCT_DOMAIN
4525 && (TYPE_CODE (SYMBOL_TYPE (sym
)) ==
4527 && (TYPE_INSTANCE_FLAGS (*type
) ==
4528 TYPE_INSTANCE_FLAGS (SYMBOL_TYPE (sym
)))
4529 && strcmp (SYMBOL_LINKAGE_NAME (sym
),
4531 replace_type (*type
, SYMBOL_TYPE (sym
));
4540 complaint (_("forward-referenced types left unresolved, "
4548 undef_types_length
= 0;
4551 /* Try to fix all the undefined types we ecountered while processing
4555 cleanup_undefined_stabs_types (struct objfile
*objfile
)
4557 cleanup_undefined_types_1 ();
4558 cleanup_undefined_types_noname (objfile
);
4561 /* See stabsread.h. */
4564 scan_file_globals (struct objfile
*objfile
)
4567 struct symbol
*sym
, *prev
;
4568 struct objfile
*resolve_objfile
;
4570 /* SVR4 based linkers copy referenced global symbols from shared
4571 libraries to the main executable.
4572 If we are scanning the symbols for a shared library, try to resolve
4573 them from the minimal symbols of the main executable first. */
4575 if (symfile_objfile
&& objfile
!= symfile_objfile
)
4576 resolve_objfile
= symfile_objfile
;
4578 resolve_objfile
= objfile
;
4582 /* Avoid expensive loop through all minimal symbols if there are
4583 no unresolved symbols. */
4584 for (hash
= 0; hash
< HASHSIZE
; hash
++)
4586 if (global_sym_chain
[hash
])
4589 if (hash
>= HASHSIZE
)
4592 for (minimal_symbol
*msymbol
: resolve_objfile
->msymbols ())
4596 /* Skip static symbols. */
4597 switch (MSYMBOL_TYPE (msymbol
))
4609 /* Get the hash index and check all the symbols
4610 under that hash index. */
4612 hash
= hashname (MSYMBOL_LINKAGE_NAME (msymbol
));
4614 for (sym
= global_sym_chain
[hash
]; sym
;)
4616 if (strcmp (MSYMBOL_LINKAGE_NAME (msymbol
),
4617 SYMBOL_LINKAGE_NAME (sym
)) == 0)
4619 /* Splice this symbol out of the hash chain and
4620 assign the value we have to it. */
4623 SYMBOL_VALUE_CHAIN (prev
) = SYMBOL_VALUE_CHAIN (sym
);
4627 global_sym_chain
[hash
] = SYMBOL_VALUE_CHAIN (sym
);
4630 /* Check to see whether we need to fix up a common block. */
4631 /* Note: this code might be executed several times for
4632 the same symbol if there are multiple references. */
4635 if (SYMBOL_CLASS (sym
) == LOC_BLOCK
)
4637 fix_common_block (sym
,
4638 MSYMBOL_VALUE_ADDRESS (resolve_objfile
,
4643 SET_SYMBOL_VALUE_ADDRESS
4644 (sym
, MSYMBOL_VALUE_ADDRESS (resolve_objfile
,
4647 SYMBOL_SECTION (sym
) = MSYMBOL_SECTION (msymbol
);
4652 sym
= SYMBOL_VALUE_CHAIN (prev
);
4656 sym
= global_sym_chain
[hash
];
4662 sym
= SYMBOL_VALUE_CHAIN (sym
);
4666 if (resolve_objfile
== objfile
)
4668 resolve_objfile
= objfile
;
4671 /* Change the storage class of any remaining unresolved globals to
4672 LOC_UNRESOLVED and remove them from the chain. */
4673 for (hash
= 0; hash
< HASHSIZE
; hash
++)
4675 sym
= global_sym_chain
[hash
];
4679 sym
= SYMBOL_VALUE_CHAIN (sym
);
4681 /* Change the symbol address from the misleading chain value
4683 SET_SYMBOL_VALUE_ADDRESS (prev
, 0);
4685 /* Complain about unresolved common block symbols. */
4686 if (SYMBOL_CLASS (prev
) == LOC_STATIC
)
4687 SYMBOL_ACLASS_INDEX (prev
) = LOC_UNRESOLVED
;
4689 complaint (_("%s: common block `%s' from "
4690 "global_sym_chain unresolved"),
4691 objfile_name (objfile
), SYMBOL_PRINT_NAME (prev
));
4694 memset (global_sym_chain
, 0, sizeof (global_sym_chain
));
4697 /* Initialize anything that needs initializing when starting to read
4698 a fresh piece of a symbol file, e.g. reading in the stuff corresponding
4702 stabsread_init (void)
4706 /* Initialize anything that needs initializing when a completely new
4707 symbol file is specified (not just adding some symbols from another
4708 file, e.g. a shared library). */
4711 stabsread_new_init (void)
4713 /* Empty the hash table of global syms looking for values. */
4714 memset (global_sym_chain
, 0, sizeof (global_sym_chain
));
4717 /* Initialize anything that needs initializing at the same time as
4718 start_symtab() is called. */
4723 global_stabs
= NULL
; /* AIX COFF */
4724 /* Leave FILENUM of 0 free for builtin types and this file's types. */
4725 n_this_object_header_files
= 1;
4726 type_vector_length
= 0;
4727 type_vector
= (struct type
**) 0;
4728 within_function
= 0;
4730 /* FIXME: If common_block_name is not already NULL, we should complain(). */
4731 common_block_name
= NULL
;
4734 /* Call after end_symtab(). */
4741 xfree (type_vector
);
4744 type_vector_length
= 0;
4745 previous_stab_code
= 0;
4749 finish_global_stabs (struct objfile
*objfile
)
4753 patch_block_stabs (*get_global_symbols (), global_stabs
, objfile
);
4754 xfree (global_stabs
);
4755 global_stabs
= NULL
;
4759 /* Find the end of the name, delimited by a ':', but don't match
4760 ObjC symbols which look like -[Foo bar::]:bla. */
4762 find_name_end (const char *name
)
4764 const char *s
= name
;
4766 if (s
[0] == '-' || *s
== '+')
4768 /* Must be an ObjC method symbol. */
4771 error (_("invalid symbol name \"%s\""), name
);
4773 s
= strchr (s
, ']');
4776 error (_("invalid symbol name \"%s\""), name
);
4778 return strchr (s
, ':');
4782 return strchr (s
, ':');
4786 /* See stabsread.h. */
4789 hashname (const char *name
)
4791 return hash (name
, strlen (name
)) % HASHSIZE
;
4794 /* Initializer for this module. */
4797 _initialize_stabsread (void)
4799 undef_types_allocated
= 20;
4800 undef_types_length
= 0;
4801 undef_types
= XNEWVEC (struct type
*, undef_types_allocated
);
4803 noname_undefs_allocated
= 20;
4804 noname_undefs_length
= 0;
4805 noname_undefs
= XNEWVEC (struct nat
, noname_undefs_allocated
);
4807 stab_register_index
= register_symbol_register_impl (LOC_REGISTER
,
4808 &stab_register_funcs
);
4809 stab_regparm_index
= register_symbol_register_impl (LOC_REGPARM_ADDR
,
4810 &stab_register_funcs
);