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
,
759 SYMBOL_SET_NAMES (sym
, gdb::string_view (string
, p
- string
), true,
762 if (SYMBOL_LANGUAGE (sym
) == language_cplus
)
763 cp_scan_for_anonymous_namespaces (get_buildsym_compunit (), sym
,
769 /* Determine the type of name being defined. */
771 /* Getting GDB to correctly skip the symbol on an undefined symbol
772 descriptor and not ever dump core is a very dodgy proposition if
773 we do things this way. I say the acorn RISC machine can just
774 fix their compiler. */
775 /* The Acorn RISC machine's compiler can put out locals that don't
776 start with "234=" or "(3,4)=", so assume anything other than the
777 deftypes we know how to handle is a local. */
778 if (!strchr ("cfFGpPrStTvVXCR", *p
))
780 if (isdigit (*p
) || *p
== '(' || *p
== '-')
789 /* c is a special case, not followed by a type-number.
790 SYMBOL:c=iVALUE for an integer constant symbol.
791 SYMBOL:c=rVALUE for a floating constant symbol.
792 SYMBOL:c=eTYPE,INTVALUE for an enum constant symbol.
793 e.g. "b:c=e6,0" for "const b = blob1"
794 (where type 6 is defined by "blobs:t6=eblob1:0,blob2:1,;"). */
797 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST
;
798 SYMBOL_TYPE (sym
) = error_type (&p
, objfile
);
799 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
800 add_symbol_to_list (sym
, get_file_symbols ());
809 struct type
*dbl_type
;
811 dbl_type
= objfile_type (objfile
)->builtin_double
;
813 = (gdb_byte
*) obstack_alloc (&objfile
->objfile_obstack
,
814 TYPE_LENGTH (dbl_type
));
816 target_float_from_string (dbl_valu
, dbl_type
, std::string (p
));
818 SYMBOL_TYPE (sym
) = dbl_type
;
819 SYMBOL_VALUE_BYTES (sym
) = dbl_valu
;
820 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST_BYTES
;
825 /* Defining integer constants this way is kind of silly,
826 since 'e' constants allows the compiler to give not
827 only the value, but the type as well. C has at least
828 int, long, unsigned int, and long long as constant
829 types; other languages probably should have at least
830 unsigned as well as signed constants. */
832 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->builtin_long
;
833 SYMBOL_VALUE (sym
) = atoi (p
);
834 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST
;
840 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->builtin_char
;
841 SYMBOL_VALUE (sym
) = atoi (p
);
842 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST
;
848 struct type
*range_type
;
851 gdb_byte
*string_local
= (gdb_byte
*) alloca (strlen (p
));
852 gdb_byte
*string_value
;
854 if (quote
!= '\'' && quote
!= '"')
856 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST
;
857 SYMBOL_TYPE (sym
) = error_type (&p
, objfile
);
858 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
859 add_symbol_to_list (sym
, get_file_symbols ());
863 /* Find matching quote, rejecting escaped quotes. */
864 while (*p
&& *p
!= quote
)
866 if (*p
== '\\' && p
[1] == quote
)
868 string_local
[ind
] = (gdb_byte
) quote
;
874 string_local
[ind
] = (gdb_byte
) (*p
);
881 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST
;
882 SYMBOL_TYPE (sym
) = error_type (&p
, objfile
);
883 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
884 add_symbol_to_list (sym
, get_file_symbols ());
888 /* NULL terminate the string. */
889 string_local
[ind
] = 0;
891 = create_static_range_type (NULL
,
892 objfile_type (objfile
)->builtin_int
,
894 SYMBOL_TYPE (sym
) = create_array_type (NULL
,
895 objfile_type (objfile
)->builtin_char
,
898 = (gdb_byte
*) obstack_alloc (&objfile
->objfile_obstack
, ind
+ 1);
899 memcpy (string_value
, string_local
, ind
+ 1);
902 SYMBOL_VALUE_BYTES (sym
) = string_value
;
903 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST_BYTES
;
908 /* SYMBOL:c=eTYPE,INTVALUE for a constant symbol whose value
909 can be represented as integral.
910 e.g. "b:c=e6,0" for "const b = blob1"
911 (where type 6 is defined by "blobs:t6=eblob1:0,blob2:1,;"). */
913 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST
;
914 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
918 SYMBOL_TYPE (sym
) = error_type (&p
, objfile
);
923 /* If the value is too big to fit in an int (perhaps because
924 it is unsigned), or something like that, we silently get
925 a bogus value. The type and everything else about it is
926 correct. Ideally, we should be using whatever we have
927 available for parsing unsigned and long long values,
929 SYMBOL_VALUE (sym
) = atoi (p
);
934 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST
;
935 SYMBOL_TYPE (sym
) = error_type (&p
, objfile
);
938 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
939 add_symbol_to_list (sym
, get_file_symbols ());
943 /* The name of a caught exception. */
944 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
945 SYMBOL_ACLASS_INDEX (sym
) = LOC_LABEL
;
946 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
947 SET_SYMBOL_VALUE_ADDRESS (sym
, valu
);
948 add_symbol_to_list (sym
, get_local_symbols ());
952 /* A static function definition. */
953 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
954 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
955 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
956 add_symbol_to_list (sym
, get_file_symbols ());
957 /* fall into process_function_types. */
959 process_function_types
:
960 /* Function result types are described as the result type in stabs.
961 We need to convert this to the function-returning-type-X type
962 in GDB. E.g. "int" is converted to "function returning int". */
963 if (TYPE_CODE (SYMBOL_TYPE (sym
)) != TYPE_CODE_FUNC
)
964 SYMBOL_TYPE (sym
) = lookup_function_type (SYMBOL_TYPE (sym
));
966 /* All functions in C++ have prototypes. Stabs does not offer an
967 explicit way to identify prototyped or unprototyped functions,
968 but both GCC and Sun CC emit stabs for the "call-as" type rather
969 than the "declared-as" type for unprototyped functions, so
970 we treat all functions as if they were prototyped. This is used
971 primarily for promotion when calling the function from GDB. */
972 TYPE_PROTOTYPED (SYMBOL_TYPE (sym
)) = 1;
974 /* fall into process_prototype_types. */
976 process_prototype_types
:
977 /* Sun acc puts declared types of arguments here. */
980 struct type
*ftype
= SYMBOL_TYPE (sym
);
985 /* Obtain a worst case guess for the number of arguments
986 by counting the semicolons. */
993 /* Allocate parameter information fields and fill them in. */
994 TYPE_FIELDS (ftype
) = (struct field
*)
995 TYPE_ALLOC (ftype
, nsemi
* sizeof (struct field
));
1000 /* A type number of zero indicates the start of varargs.
1001 FIXME: GDB currently ignores vararg functions. */
1002 if (p
[0] == '0' && p
[1] == '\0')
1004 ptype
= read_type (&p
, objfile
);
1006 /* The Sun compilers mark integer arguments, which should
1007 be promoted to the width of the calling conventions, with
1008 a type which references itself. This type is turned into
1009 a TYPE_CODE_VOID type by read_type, and we have to turn
1010 it back into builtin_int here.
1011 FIXME: Do we need a new builtin_promoted_int_arg ? */
1012 if (TYPE_CODE (ptype
) == TYPE_CODE_VOID
)
1013 ptype
= objfile_type (objfile
)->builtin_int
;
1014 TYPE_FIELD_TYPE (ftype
, nparams
) = ptype
;
1015 TYPE_FIELD_ARTIFICIAL (ftype
, nparams
++) = 0;
1017 TYPE_NFIELDS (ftype
) = nparams
;
1018 TYPE_PROTOTYPED (ftype
) = 1;
1023 /* A global function definition. */
1024 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
1025 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
1026 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1027 add_symbol_to_list (sym
, get_global_symbols ());
1028 goto process_function_types
;
1031 /* For a class G (global) symbol, it appears that the
1032 value is not correct. It is necessary to search for the
1033 corresponding linker definition to find the value.
1034 These definitions appear at the end of the namelist. */
1035 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
1036 SYMBOL_ACLASS_INDEX (sym
) = LOC_STATIC
;
1037 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1038 /* Don't add symbol references to global_sym_chain.
1039 Symbol references don't have valid names and wont't match up with
1040 minimal symbols when the global_sym_chain is relocated.
1041 We'll fixup symbol references when we fixup the defining symbol. */
1042 if (SYMBOL_LINKAGE_NAME (sym
) && SYMBOL_LINKAGE_NAME (sym
)[0] != '#')
1044 i
= hashname (SYMBOL_LINKAGE_NAME (sym
));
1045 SYMBOL_VALUE_CHAIN (sym
) = global_sym_chain
[i
];
1046 global_sym_chain
[i
] = sym
;
1048 add_symbol_to_list (sym
, get_global_symbols ());
1051 /* This case is faked by a conditional above,
1052 when there is no code letter in the dbx data.
1053 Dbx data never actually contains 'l'. */
1056 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
1057 SYMBOL_ACLASS_INDEX (sym
) = LOC_LOCAL
;
1058 SYMBOL_VALUE (sym
) = valu
;
1059 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1060 add_symbol_to_list (sym
, get_local_symbols ());
1065 /* pF is a two-letter code that means a function parameter in Fortran.
1066 The type-number specifies the type of the return value.
1067 Translate it into a pointer-to-function type. */
1071 = lookup_pointer_type
1072 (lookup_function_type (read_type (&p
, objfile
)));
1075 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
1077 SYMBOL_ACLASS_INDEX (sym
) = LOC_ARG
;
1078 SYMBOL_VALUE (sym
) = valu
;
1079 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1080 SYMBOL_IS_ARGUMENT (sym
) = 1;
1081 add_symbol_to_list (sym
, get_local_symbols ());
1083 if (gdbarch_byte_order (gdbarch
) != BFD_ENDIAN_BIG
)
1085 /* On little-endian machines, this crud is never necessary,
1086 and, if the extra bytes contain garbage, is harmful. */
1090 /* If it's gcc-compiled, if it says `short', believe it. */
1091 if (processing_gcc_compilation
1092 || gdbarch_believe_pcc_promotion (gdbarch
))
1095 if (!gdbarch_believe_pcc_promotion (gdbarch
))
1097 /* If PCC says a parameter is a short or a char, it is
1099 if (TYPE_LENGTH (SYMBOL_TYPE (sym
))
1100 < gdbarch_int_bit (gdbarch
) / TARGET_CHAR_BIT
1101 && TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_INT
)
1104 TYPE_UNSIGNED (SYMBOL_TYPE (sym
))
1105 ? objfile_type (objfile
)->builtin_unsigned_int
1106 : objfile_type (objfile
)->builtin_int
;
1113 /* acc seems to use P to declare the prototypes of functions that
1114 are referenced by this file. gdb is not prepared to deal
1115 with this extra information. FIXME, it ought to. */
1118 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
1119 goto process_prototype_types
;
1124 /* Parameter which is in a register. */
1125 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
1126 SYMBOL_ACLASS_INDEX (sym
) = stab_register_index
;
1127 SYMBOL_IS_ARGUMENT (sym
) = 1;
1128 SYMBOL_VALUE (sym
) = valu
;
1129 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1130 add_symbol_to_list (sym
, get_local_symbols ());
1134 /* Register variable (either global or local). */
1135 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
1136 SYMBOL_ACLASS_INDEX (sym
) = stab_register_index
;
1137 SYMBOL_VALUE (sym
) = valu
;
1138 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1139 if (within_function
)
1141 /* Sun cc uses a pair of symbols, one 'p' and one 'r', with
1142 the same name to represent an argument passed in a
1143 register. GCC uses 'P' for the same case. So if we find
1144 such a symbol pair we combine it into one 'P' symbol.
1145 For Sun cc we need to do this regardless of
1146 stabs_argument_has_addr, because the compiler puts out
1147 the 'p' symbol even if it never saves the argument onto
1150 On most machines, we want to preserve both symbols, so
1151 that we can still get information about what is going on
1152 with the stack (VAX for computing args_printed, using
1153 stack slots instead of saved registers in backtraces,
1156 Note that this code illegally combines
1157 main(argc) struct foo argc; { register struct foo argc; }
1158 but this case is considered pathological and causes a warning
1159 from a decent compiler. */
1161 struct pending
*local_symbols
= *get_local_symbols ();
1163 && local_symbols
->nsyms
> 0
1164 && gdbarch_stabs_argument_has_addr (gdbarch
, SYMBOL_TYPE (sym
)))
1166 struct symbol
*prev_sym
;
1168 prev_sym
= local_symbols
->symbol
[local_symbols
->nsyms
- 1];
1169 if ((SYMBOL_CLASS (prev_sym
) == LOC_REF_ARG
1170 || SYMBOL_CLASS (prev_sym
) == LOC_ARG
)
1171 && strcmp (SYMBOL_LINKAGE_NAME (prev_sym
),
1172 SYMBOL_LINKAGE_NAME (sym
)) == 0)
1174 SYMBOL_ACLASS_INDEX (prev_sym
) = stab_register_index
;
1175 /* Use the type from the LOC_REGISTER; that is the type
1176 that is actually in that register. */
1177 SYMBOL_TYPE (prev_sym
) = SYMBOL_TYPE (sym
);
1178 SYMBOL_VALUE (prev_sym
) = SYMBOL_VALUE (sym
);
1183 add_symbol_to_list (sym
, get_local_symbols ());
1186 add_symbol_to_list (sym
, get_file_symbols ());
1190 /* Static symbol at top level of file. */
1191 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
1192 SYMBOL_ACLASS_INDEX (sym
) = LOC_STATIC
;
1193 SET_SYMBOL_VALUE_ADDRESS (sym
, valu
);
1194 if (gdbarch_static_transform_name_p (gdbarch
)
1195 && gdbarch_static_transform_name (gdbarch
,
1196 SYMBOL_LINKAGE_NAME (sym
))
1197 != SYMBOL_LINKAGE_NAME (sym
))
1199 struct bound_minimal_symbol msym
;
1201 msym
= lookup_minimal_symbol (SYMBOL_LINKAGE_NAME (sym
),
1203 if (msym
.minsym
!= NULL
)
1205 const char *new_name
= gdbarch_static_transform_name
1206 (gdbarch
, SYMBOL_LINKAGE_NAME (sym
));
1208 SYMBOL_SET_LINKAGE_NAME (sym
, new_name
);
1209 SET_SYMBOL_VALUE_ADDRESS (sym
,
1210 BMSYMBOL_VALUE_ADDRESS (msym
));
1213 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1214 add_symbol_to_list (sym
, get_file_symbols ());
1218 /* In Ada, there is no distinction between typedef and non-typedef;
1219 any type declaration implicitly has the equivalent of a typedef,
1220 and thus 't' is in fact equivalent to 'Tt'.
1222 Therefore, for Ada units, we check the character immediately
1223 before the 't', and if we do not find a 'T', then make sure to
1224 create the associated symbol in the STRUCT_DOMAIN ('t' definitions
1225 will be stored in the VAR_DOMAIN). If the symbol was indeed
1226 defined as 'Tt' then the STRUCT_DOMAIN symbol will be created
1227 elsewhere, so we don't need to take care of that.
1229 This is important to do, because of forward references:
1230 The cleanup of undefined types stored in undef_types only uses
1231 STRUCT_DOMAIN symbols to perform the replacement. */
1232 synonym
= (SYMBOL_LANGUAGE (sym
) == language_ada
&& p
[-2] != 'T');
1235 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
1237 /* For a nameless type, we don't want a create a symbol, thus we
1238 did not use `sym'. Return without further processing. */
1242 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
1243 SYMBOL_VALUE (sym
) = valu
;
1244 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1245 /* C++ vagaries: we may have a type which is derived from
1246 a base type which did not have its name defined when the
1247 derived class was output. We fill in the derived class's
1248 base part member's name here in that case. */
1249 if (TYPE_NAME (SYMBOL_TYPE (sym
)) != NULL
)
1250 if ((TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_STRUCT
1251 || TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_UNION
)
1252 && TYPE_N_BASECLASSES (SYMBOL_TYPE (sym
)))
1256 for (j
= TYPE_N_BASECLASSES (SYMBOL_TYPE (sym
)) - 1; j
>= 0; j
--)
1257 if (TYPE_BASECLASS_NAME (SYMBOL_TYPE (sym
), j
) == 0)
1258 TYPE_BASECLASS_NAME (SYMBOL_TYPE (sym
), j
) =
1259 TYPE_NAME (TYPE_BASECLASS (SYMBOL_TYPE (sym
), j
));
1262 if (TYPE_NAME (SYMBOL_TYPE (sym
)) == NULL
)
1264 if ((TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_PTR
1265 && strcmp (SYMBOL_LINKAGE_NAME (sym
), vtbl_ptr_name
))
1266 || TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_FUNC
)
1268 /* If we are giving a name to a type such as "pointer to
1269 foo" or "function returning foo", we better not set
1270 the TYPE_NAME. If the program contains "typedef char
1271 *caddr_t;", we don't want all variables of type char
1272 * to print as caddr_t. This is not just a
1273 consequence of GDB's type management; PCC and GCC (at
1274 least through version 2.4) both output variables of
1275 either type char * or caddr_t with the type number
1276 defined in the 't' symbol for caddr_t. If a future
1277 compiler cleans this up it GDB is not ready for it
1278 yet, but if it becomes ready we somehow need to
1279 disable this check (without breaking the PCC/GCC2.4
1284 Fortunately, this check seems not to be necessary
1285 for anything except pointers or functions. */
1286 /* ezannoni: 2000-10-26. This seems to apply for
1287 versions of gcc older than 2.8. This was the original
1288 problem: with the following code gdb would tell that
1289 the type for name1 is caddr_t, and func is char().
1291 typedef char *caddr_t;
1303 /* Pascal accepts names for pointer types. */
1304 if (get_current_subfile ()->language
== language_pascal
)
1306 TYPE_NAME (SYMBOL_TYPE (sym
)) = SYMBOL_LINKAGE_NAME (sym
);
1310 TYPE_NAME (SYMBOL_TYPE (sym
)) = SYMBOL_LINKAGE_NAME (sym
);
1313 add_symbol_to_list (sym
, get_file_symbols ());
1317 /* Create the STRUCT_DOMAIN clone. */
1318 struct symbol
*struct_sym
= allocate_symbol (objfile
);
1321 SYMBOL_ACLASS_INDEX (struct_sym
) = LOC_TYPEDEF
;
1322 SYMBOL_VALUE (struct_sym
) = valu
;
1323 SYMBOL_DOMAIN (struct_sym
) = STRUCT_DOMAIN
;
1324 if (TYPE_NAME (SYMBOL_TYPE (sym
)) == 0)
1325 TYPE_NAME (SYMBOL_TYPE (sym
))
1326 = obconcat (&objfile
->objfile_obstack
,
1327 SYMBOL_LINKAGE_NAME (sym
),
1329 add_symbol_to_list (struct_sym
, get_file_symbols ());
1335 /* Struct, union, or enum tag. For GNU C++, this can be be followed
1336 by 't' which means we are typedef'ing it as well. */
1337 synonym
= *p
== 't';
1342 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
1344 /* For a nameless type, we don't want a create a symbol, thus we
1345 did not use `sym'. Return without further processing. */
1349 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
1350 SYMBOL_VALUE (sym
) = valu
;
1351 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
1352 if (TYPE_NAME (SYMBOL_TYPE (sym
)) == 0)
1353 TYPE_NAME (SYMBOL_TYPE (sym
))
1354 = obconcat (&objfile
->objfile_obstack
,
1355 SYMBOL_LINKAGE_NAME (sym
),
1357 add_symbol_to_list (sym
, get_file_symbols ());
1361 /* Clone the sym and then modify it. */
1362 struct symbol
*typedef_sym
= allocate_symbol (objfile
);
1364 *typedef_sym
= *sym
;
1365 SYMBOL_ACLASS_INDEX (typedef_sym
) = LOC_TYPEDEF
;
1366 SYMBOL_VALUE (typedef_sym
) = valu
;
1367 SYMBOL_DOMAIN (typedef_sym
) = VAR_DOMAIN
;
1368 if (TYPE_NAME (SYMBOL_TYPE (sym
)) == 0)
1369 TYPE_NAME (SYMBOL_TYPE (sym
))
1370 = obconcat (&objfile
->objfile_obstack
,
1371 SYMBOL_LINKAGE_NAME (sym
),
1373 add_symbol_to_list (typedef_sym
, get_file_symbols ());
1378 /* Static symbol of local scope. */
1379 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
1380 SYMBOL_ACLASS_INDEX (sym
) = LOC_STATIC
;
1381 SET_SYMBOL_VALUE_ADDRESS (sym
, valu
);
1382 if (gdbarch_static_transform_name_p (gdbarch
)
1383 && gdbarch_static_transform_name (gdbarch
,
1384 SYMBOL_LINKAGE_NAME (sym
))
1385 != SYMBOL_LINKAGE_NAME (sym
))
1387 struct bound_minimal_symbol msym
;
1389 msym
= lookup_minimal_symbol (SYMBOL_LINKAGE_NAME (sym
),
1391 if (msym
.minsym
!= NULL
)
1393 const char *new_name
= gdbarch_static_transform_name
1394 (gdbarch
, SYMBOL_LINKAGE_NAME (sym
));
1396 SYMBOL_SET_LINKAGE_NAME (sym
, new_name
);
1397 SET_SYMBOL_VALUE_ADDRESS (sym
, BMSYMBOL_VALUE_ADDRESS (msym
));
1400 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1401 add_symbol_to_list (sym
, get_local_symbols ());
1405 /* Reference parameter */
1406 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
1407 SYMBOL_ACLASS_INDEX (sym
) = LOC_REF_ARG
;
1408 SYMBOL_IS_ARGUMENT (sym
) = 1;
1409 SYMBOL_VALUE (sym
) = valu
;
1410 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1411 add_symbol_to_list (sym
, get_local_symbols ());
1415 /* Reference parameter which is in a register. */
1416 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
1417 SYMBOL_ACLASS_INDEX (sym
) = stab_regparm_index
;
1418 SYMBOL_IS_ARGUMENT (sym
) = 1;
1419 SYMBOL_VALUE (sym
) = valu
;
1420 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1421 add_symbol_to_list (sym
, get_local_symbols ());
1425 /* This is used by Sun FORTRAN for "function result value".
1426 Sun claims ("dbx and dbxtool interfaces", 2nd ed)
1427 that Pascal uses it too, but when I tried it Pascal used
1428 "x:3" (local symbol) instead. */
1429 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
1430 SYMBOL_ACLASS_INDEX (sym
) = LOC_LOCAL
;
1431 SYMBOL_VALUE (sym
) = valu
;
1432 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1433 add_symbol_to_list (sym
, get_local_symbols ());
1437 SYMBOL_TYPE (sym
) = error_type (&p
, objfile
);
1438 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST
;
1439 SYMBOL_VALUE (sym
) = 0;
1440 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1441 add_symbol_to_list (sym
, get_file_symbols ());
1445 /* Some systems pass variables of certain types by reference instead
1446 of by value, i.e. they will pass the address of a structure (in a
1447 register or on the stack) instead of the structure itself. */
1449 if (gdbarch_stabs_argument_has_addr (gdbarch
, SYMBOL_TYPE (sym
))
1450 && SYMBOL_IS_ARGUMENT (sym
))
1452 /* We have to convert LOC_REGISTER to LOC_REGPARM_ADDR (for
1453 variables passed in a register). */
1454 if (SYMBOL_CLASS (sym
) == LOC_REGISTER
)
1455 SYMBOL_ACLASS_INDEX (sym
) = LOC_REGPARM_ADDR
;
1456 /* Likewise for converting LOC_ARG to LOC_REF_ARG (for the 7th
1457 and subsequent arguments on SPARC, for example). */
1458 else if (SYMBOL_CLASS (sym
) == LOC_ARG
)
1459 SYMBOL_ACLASS_INDEX (sym
) = LOC_REF_ARG
;
1465 /* Skip rest of this symbol and return an error type.
1467 General notes on error recovery: error_type always skips to the
1468 end of the symbol (modulo cretinous dbx symbol name continuation).
1469 Thus code like this:
1471 if (*(*pp)++ != ';')
1472 return error_type (pp, objfile);
1474 is wrong because if *pp starts out pointing at '\0' (typically as the
1475 result of an earlier error), it will be incremented to point to the
1476 start of the next symbol, which might produce strange results, at least
1477 if you run off the end of the string table. Instead use
1480 return error_type (pp, objfile);
1486 foo = error_type (pp, objfile);
1490 And in case it isn't obvious, the point of all this hair is so the compiler
1491 can define new types and new syntaxes, and old versions of the
1492 debugger will be able to read the new symbol tables. */
1494 static struct type
*
1495 error_type (const char **pp
, struct objfile
*objfile
)
1497 complaint (_("couldn't parse type; debugger out of date?"));
1500 /* Skip to end of symbol. */
1501 while (**pp
!= '\0')
1506 /* Check for and handle cretinous dbx symbol name continuation! */
1507 if ((*pp
)[-1] == '\\' || (*pp
)[-1] == '?')
1509 *pp
= next_symbol_text (objfile
);
1516 return objfile_type (objfile
)->builtin_error
;
1520 /* Read type information or a type definition; return the type. Even
1521 though this routine accepts either type information or a type
1522 definition, the distinction is relevant--some parts of stabsread.c
1523 assume that type information starts with a digit, '-', or '(' in
1524 deciding whether to call read_type. */
1526 static struct type
*
1527 read_type (const char **pp
, struct objfile
*objfile
)
1529 struct type
*type
= 0;
1532 char type_descriptor
;
1534 /* Size in bits of type if specified by a type attribute, or -1 if
1535 there is no size attribute. */
1538 /* Used to distinguish string and bitstring from char-array and set. */
1541 /* Used to distinguish vector from array. */
1544 /* Read type number if present. The type number may be omitted.
1545 for instance in a two-dimensional array declared with type
1546 "ar1;1;10;ar1;1;10;4". */
1547 if ((**pp
>= '0' && **pp
<= '9')
1551 if (read_type_number (pp
, typenums
) != 0)
1552 return error_type (pp
, objfile
);
1556 /* Type is not being defined here. Either it already
1557 exists, or this is a forward reference to it.
1558 dbx_alloc_type handles both cases. */
1559 type
= dbx_alloc_type (typenums
, objfile
);
1561 /* If this is a forward reference, arrange to complain if it
1562 doesn't get patched up by the time we're done
1564 if (TYPE_CODE (type
) == TYPE_CODE_UNDEF
)
1565 add_undefined_type (type
, typenums
);
1570 /* Type is being defined here. */
1572 Also skip the type descriptor - we get it below with (*pp)[-1]. */
1577 /* 'typenums=' not present, type is anonymous. Read and return
1578 the definition, but don't put it in the type vector. */
1579 typenums
[0] = typenums
[1] = -1;
1584 type_descriptor
= (*pp
)[-1];
1585 switch (type_descriptor
)
1589 enum type_code code
;
1591 /* Used to index through file_symbols. */
1592 struct pending
*ppt
;
1595 /* Name including "struct", etc. */
1599 const char *from
, *p
, *q1
, *q2
;
1601 /* Set the type code according to the following letter. */
1605 code
= TYPE_CODE_STRUCT
;
1608 code
= TYPE_CODE_UNION
;
1611 code
= TYPE_CODE_ENUM
;
1615 /* Complain and keep going, so compilers can invent new
1616 cross-reference types. */
1617 complaint (_("Unrecognized cross-reference type `%c'"),
1619 code
= TYPE_CODE_STRUCT
;
1624 q1
= strchr (*pp
, '<');
1625 p
= strchr (*pp
, ':');
1627 return error_type (pp
, objfile
);
1628 if (q1
&& p
> q1
&& p
[1] == ':')
1630 int nesting_level
= 0;
1632 for (q2
= q1
; *q2
; q2
++)
1636 else if (*q2
== '>')
1638 else if (*q2
== ':' && nesting_level
== 0)
1643 return error_type (pp
, objfile
);
1646 if (get_current_subfile ()->language
== language_cplus
)
1648 char *name
= (char *) alloca (p
- *pp
+ 1);
1650 memcpy (name
, *pp
, p
- *pp
);
1651 name
[p
- *pp
] = '\0';
1653 std::string new_name
= cp_canonicalize_string (name
);
1654 if (!new_name
.empty ())
1655 type_name
= obstack_strdup (&objfile
->objfile_obstack
,
1658 if (type_name
== NULL
)
1660 char *to
= type_name
= (char *)
1661 obstack_alloc (&objfile
->objfile_obstack
, p
- *pp
+ 1);
1663 /* Copy the name. */
1670 /* Set the pointer ahead of the name which we just read, and
1675 /* If this type has already been declared, then reuse the same
1676 type, rather than allocating a new one. This saves some
1679 for (ppt
= *get_file_symbols (); ppt
; ppt
= ppt
->next
)
1680 for (i
= 0; i
< ppt
->nsyms
; i
++)
1682 struct symbol
*sym
= ppt
->symbol
[i
];
1684 if (SYMBOL_CLASS (sym
) == LOC_TYPEDEF
1685 && SYMBOL_DOMAIN (sym
) == STRUCT_DOMAIN
1686 && (TYPE_CODE (SYMBOL_TYPE (sym
)) == code
)
1687 && strcmp (SYMBOL_LINKAGE_NAME (sym
), type_name
) == 0)
1689 obstack_free (&objfile
->objfile_obstack
, type_name
);
1690 type
= SYMBOL_TYPE (sym
);
1691 if (typenums
[0] != -1)
1692 *dbx_lookup_type (typenums
, objfile
) = type
;
1697 /* Didn't find the type to which this refers, so we must
1698 be dealing with a forward reference. Allocate a type
1699 structure for it, and keep track of it so we can
1700 fill in the rest of the fields when we get the full
1702 type
= dbx_alloc_type (typenums
, objfile
);
1703 TYPE_CODE (type
) = code
;
1704 TYPE_NAME (type
) = type_name
;
1705 INIT_CPLUS_SPECIFIC (type
);
1706 TYPE_STUB (type
) = 1;
1708 add_undefined_type (type
, typenums
);
1712 case '-': /* RS/6000 built-in type */
1726 /* We deal with something like t(1,2)=(3,4)=... which
1727 the Lucid compiler and recent gcc versions (post 2.7.3) use. */
1729 /* Allocate and enter the typedef type first.
1730 This handles recursive types. */
1731 type
= dbx_alloc_type (typenums
, objfile
);
1732 TYPE_CODE (type
) = TYPE_CODE_TYPEDEF
;
1734 struct type
*xtype
= read_type (pp
, objfile
);
1738 /* It's being defined as itself. That means it is "void". */
1739 TYPE_CODE (type
) = TYPE_CODE_VOID
;
1740 TYPE_LENGTH (type
) = 1;
1742 else if (type_size
>= 0 || is_string
)
1744 /* This is the absolute wrong way to construct types. Every
1745 other debug format has found a way around this problem and
1746 the related problems with unnecessarily stubbed types;
1747 someone motivated should attempt to clean up the issue
1748 here as well. Once a type pointed to has been created it
1749 should not be modified.
1751 Well, it's not *absolutely* wrong. Constructing recursive
1752 types (trees, linked lists) necessarily entails modifying
1753 types after creating them. Constructing any loop structure
1754 entails side effects. The Dwarf 2 reader does handle this
1755 more gracefully (it never constructs more than once
1756 instance of a type object, so it doesn't have to copy type
1757 objects wholesale), but it still mutates type objects after
1758 other folks have references to them.
1760 Keep in mind that this circularity/mutation issue shows up
1761 at the source language level, too: C's "incomplete types",
1762 for example. So the proper cleanup, I think, would be to
1763 limit GDB's type smashing to match exactly those required
1764 by the source language. So GDB could have a
1765 "complete_this_type" function, but never create unnecessary
1766 copies of a type otherwise. */
1767 replace_type (type
, xtype
);
1768 TYPE_NAME (type
) = NULL
;
1772 TYPE_TARGET_STUB (type
) = 1;
1773 TYPE_TARGET_TYPE (type
) = xtype
;
1778 /* In the following types, we must be sure to overwrite any existing
1779 type that the typenums refer to, rather than allocating a new one
1780 and making the typenums point to the new one. This is because there
1781 may already be pointers to the existing type (if it had been
1782 forward-referenced), and we must change it to a pointer, function,
1783 reference, or whatever, *in-place*. */
1785 case '*': /* Pointer to another type */
1786 type1
= read_type (pp
, objfile
);
1787 type
= make_pointer_type (type1
, dbx_lookup_type (typenums
, objfile
));
1790 case '&': /* Reference to another type */
1791 type1
= read_type (pp
, objfile
);
1792 type
= make_reference_type (type1
, dbx_lookup_type (typenums
, objfile
),
1796 case 'f': /* Function returning another type */
1797 type1
= read_type (pp
, objfile
);
1798 type
= make_function_type (type1
, dbx_lookup_type (typenums
, objfile
));
1801 case 'g': /* Prototyped function. (Sun) */
1803 /* Unresolved questions:
1805 - According to Sun's ``STABS Interface Manual'', for 'f'
1806 and 'F' symbol descriptors, a `0' in the argument type list
1807 indicates a varargs function. But it doesn't say how 'g'
1808 type descriptors represent that info. Someone with access
1809 to Sun's toolchain should try it out.
1811 - According to the comment in define_symbol (search for
1812 `process_prototype_types:'), Sun emits integer arguments as
1813 types which ref themselves --- like `void' types. Do we
1814 have to deal with that here, too? Again, someone with
1815 access to Sun's toolchain should try it out and let us
1818 const char *type_start
= (*pp
) - 1;
1819 struct type
*return_type
= read_type (pp
, objfile
);
1820 struct type
*func_type
1821 = make_function_type (return_type
,
1822 dbx_lookup_type (typenums
, objfile
));
1825 struct type_list
*next
;
1829 while (**pp
&& **pp
!= '#')
1831 struct type
*arg_type
= read_type (pp
, objfile
);
1832 struct type_list
*newobj
= XALLOCA (struct type_list
);
1833 newobj
->type
= arg_type
;
1834 newobj
->next
= arg_types
;
1842 complaint (_("Prototyped function type didn't "
1843 "end arguments with `#':\n%s"),
1847 /* If there is just one argument whose type is `void', then
1848 that's just an empty argument list. */
1850 && ! arg_types
->next
1851 && TYPE_CODE (arg_types
->type
) == TYPE_CODE_VOID
)
1854 TYPE_FIELDS (func_type
)
1855 = (struct field
*) TYPE_ALLOC (func_type
,
1856 num_args
* sizeof (struct field
));
1857 memset (TYPE_FIELDS (func_type
), 0, num_args
* sizeof (struct field
));
1860 struct type_list
*t
;
1862 /* We stuck each argument type onto the front of the list
1863 when we read it, so the list is reversed. Build the
1864 fields array right-to-left. */
1865 for (t
= arg_types
, i
= num_args
- 1; t
; t
= t
->next
, i
--)
1866 TYPE_FIELD_TYPE (func_type
, i
) = t
->type
;
1868 TYPE_NFIELDS (func_type
) = num_args
;
1869 TYPE_PROTOTYPED (func_type
) = 1;
1875 case 'k': /* Const qualifier on some type (Sun) */
1876 type
= read_type (pp
, objfile
);
1877 type
= make_cv_type (1, TYPE_VOLATILE (type
), type
,
1878 dbx_lookup_type (typenums
, objfile
));
1881 case 'B': /* Volatile qual on some type (Sun) */
1882 type
= read_type (pp
, objfile
);
1883 type
= make_cv_type (TYPE_CONST (type
), 1, type
,
1884 dbx_lookup_type (typenums
, objfile
));
1888 if (isdigit (**pp
) || **pp
== '(' || **pp
== '-')
1889 { /* Member (class & variable) type */
1890 /* FIXME -- we should be doing smash_to_XXX types here. */
1892 struct type
*domain
= read_type (pp
, objfile
);
1893 struct type
*memtype
;
1896 /* Invalid member type data format. */
1897 return error_type (pp
, objfile
);
1900 memtype
= read_type (pp
, objfile
);
1901 type
= dbx_alloc_type (typenums
, objfile
);
1902 smash_to_memberptr_type (type
, domain
, memtype
);
1905 /* type attribute */
1907 const char *attr
= *pp
;
1909 /* Skip to the semicolon. */
1910 while (**pp
!= ';' && **pp
!= '\0')
1913 return error_type (pp
, objfile
);
1915 ++ * pp
; /* Skip the semicolon. */
1919 case 's': /* Size attribute */
1920 type_size
= atoi (attr
+ 1);
1925 case 'S': /* String attribute */
1926 /* FIXME: check to see if following type is array? */
1930 case 'V': /* Vector attribute */
1931 /* FIXME: check to see if following type is array? */
1936 /* Ignore unrecognized type attributes, so future compilers
1937 can invent new ones. */
1945 case '#': /* Method (class & fn) type */
1946 if ((*pp
)[0] == '#')
1948 /* We'll get the parameter types from the name. */
1949 struct type
*return_type
;
1952 return_type
= read_type (pp
, objfile
);
1953 if (*(*pp
)++ != ';')
1954 complaint (_("invalid (minimal) member type "
1955 "data format at symtab pos %d."),
1957 type
= allocate_stub_method (return_type
);
1958 if (typenums
[0] != -1)
1959 *dbx_lookup_type (typenums
, objfile
) = type
;
1963 struct type
*domain
= read_type (pp
, objfile
);
1964 struct type
*return_type
;
1969 /* Invalid member type data format. */
1970 return error_type (pp
, objfile
);
1974 return_type
= read_type (pp
, objfile
);
1975 args
= read_args (pp
, ';', objfile
, &nargs
, &varargs
);
1977 return error_type (pp
, objfile
);
1978 type
= dbx_alloc_type (typenums
, objfile
);
1979 smash_to_method_type (type
, domain
, return_type
, args
,
1984 case 'r': /* Range type */
1985 type
= read_range_type (pp
, typenums
, type_size
, objfile
);
1986 if (typenums
[0] != -1)
1987 *dbx_lookup_type (typenums
, objfile
) = type
;
1992 /* Sun ACC builtin int type */
1993 type
= read_sun_builtin_type (pp
, typenums
, objfile
);
1994 if (typenums
[0] != -1)
1995 *dbx_lookup_type (typenums
, objfile
) = type
;
1999 case 'R': /* Sun ACC builtin float type */
2000 type
= read_sun_floating_type (pp
, typenums
, objfile
);
2001 if (typenums
[0] != -1)
2002 *dbx_lookup_type (typenums
, objfile
) = type
;
2005 case 'e': /* Enumeration type */
2006 type
= dbx_alloc_type (typenums
, objfile
);
2007 type
= read_enum_type (pp
, type
, objfile
);
2008 if (typenums
[0] != -1)
2009 *dbx_lookup_type (typenums
, objfile
) = type
;
2012 case 's': /* Struct type */
2013 case 'u': /* Union type */
2015 enum type_code type_code
= TYPE_CODE_UNDEF
;
2016 type
= dbx_alloc_type (typenums
, objfile
);
2017 switch (type_descriptor
)
2020 type_code
= TYPE_CODE_STRUCT
;
2023 type_code
= TYPE_CODE_UNION
;
2026 type
= read_struct_type (pp
, type
, type_code
, objfile
);
2030 case 'a': /* Array type */
2032 return error_type (pp
, objfile
);
2035 type
= dbx_alloc_type (typenums
, objfile
);
2036 type
= read_array_type (pp
, type
, objfile
);
2038 TYPE_CODE (type
) = TYPE_CODE_STRING
;
2040 make_vector_type (type
);
2043 case 'S': /* Set type */
2044 type1
= read_type (pp
, objfile
);
2045 type
= create_set_type (NULL
, type1
);
2046 if (typenums
[0] != -1)
2047 *dbx_lookup_type (typenums
, objfile
) = type
;
2051 --*pp
; /* Go back to the symbol in error. */
2052 /* Particularly important if it was \0! */
2053 return error_type (pp
, objfile
);
2058 warning (_("GDB internal error, type is NULL in stabsread.c."));
2059 return error_type (pp
, objfile
);
2062 /* Size specified in a type attribute overrides any other size. */
2063 if (type_size
!= -1)
2064 TYPE_LENGTH (type
) = (type_size
+ TARGET_CHAR_BIT
- 1) / TARGET_CHAR_BIT
;
2069 /* RS/6000 xlc/dbx combination uses a set of builtin types, starting from -1.
2070 Return the proper type node for a given builtin type number. */
2072 static const struct objfile_key
<struct type
*,
2073 gdb::noop_deleter
<struct type
*>>
2074 rs6000_builtin_type_data
;
2076 static struct type
*
2077 rs6000_builtin_type (int typenum
, struct objfile
*objfile
)
2079 struct type
**negative_types
= rs6000_builtin_type_data
.get (objfile
);
2081 /* We recognize types numbered from -NUMBER_RECOGNIZED to -1. */
2082 #define NUMBER_RECOGNIZED 34
2083 struct type
*rettype
= NULL
;
2085 if (typenum
>= 0 || typenum
< -NUMBER_RECOGNIZED
)
2087 complaint (_("Unknown builtin type %d"), typenum
);
2088 return objfile_type (objfile
)->builtin_error
;
2091 if (!negative_types
)
2093 /* This includes an empty slot for type number -0. */
2094 negative_types
= OBSTACK_CALLOC (&objfile
->objfile_obstack
,
2095 NUMBER_RECOGNIZED
+ 1, struct type
*);
2096 rs6000_builtin_type_data
.set (objfile
, negative_types
);
2099 if (negative_types
[-typenum
] != NULL
)
2100 return negative_types
[-typenum
];
2102 #if TARGET_CHAR_BIT != 8
2103 #error This code wrong for TARGET_CHAR_BIT not 8
2104 /* These definitions all assume that TARGET_CHAR_BIT is 8. I think
2105 that if that ever becomes not true, the correct fix will be to
2106 make the size in the struct type to be in bits, not in units of
2113 /* The size of this and all the other types are fixed, defined
2114 by the debugging format. If there is a type called "int" which
2115 is other than 32 bits, then it should use a new negative type
2116 number (or avoid negative type numbers for that case).
2117 See stabs.texinfo. */
2118 rettype
= init_integer_type (objfile
, 32, 0, "int");
2121 rettype
= init_integer_type (objfile
, 8, 0, "char");
2122 TYPE_NOSIGN (rettype
) = 1;
2125 rettype
= init_integer_type (objfile
, 16, 0, "short");
2128 rettype
= init_integer_type (objfile
, 32, 0, "long");
2131 rettype
= init_integer_type (objfile
, 8, 1, "unsigned char");
2134 rettype
= init_integer_type (objfile
, 8, 0, "signed char");
2137 rettype
= init_integer_type (objfile
, 16, 1, "unsigned short");
2140 rettype
= init_integer_type (objfile
, 32, 1, "unsigned int");
2143 rettype
= init_integer_type (objfile
, 32, 1, "unsigned");
2146 rettype
= init_integer_type (objfile
, 32, 1, "unsigned long");
2149 rettype
= init_type (objfile
, TYPE_CODE_VOID
, TARGET_CHAR_BIT
, "void");
2152 /* IEEE single precision (32 bit). */
2153 rettype
= init_float_type (objfile
, 32, "float",
2154 floatformats_ieee_single
);
2157 /* IEEE double precision (64 bit). */
2158 rettype
= init_float_type (objfile
, 64, "double",
2159 floatformats_ieee_double
);
2162 /* This is an IEEE double on the RS/6000, and different machines with
2163 different sizes for "long double" should use different negative
2164 type numbers. See stabs.texinfo. */
2165 rettype
= init_float_type (objfile
, 64, "long double",
2166 floatformats_ieee_double
);
2169 rettype
= init_integer_type (objfile
, 32, 0, "integer");
2172 rettype
= init_boolean_type (objfile
, 32, 1, "boolean");
2175 rettype
= init_float_type (objfile
, 32, "short real",
2176 floatformats_ieee_single
);
2179 rettype
= init_float_type (objfile
, 64, "real",
2180 floatformats_ieee_double
);
2183 rettype
= init_type (objfile
, TYPE_CODE_ERROR
, 0, "stringptr");
2186 rettype
= init_character_type (objfile
, 8, 1, "character");
2189 rettype
= init_boolean_type (objfile
, 8, 1, "logical*1");
2192 rettype
= init_boolean_type (objfile
, 16, 1, "logical*2");
2195 rettype
= init_boolean_type (objfile
, 32, 1, "logical*4");
2198 rettype
= init_boolean_type (objfile
, 32, 1, "logical");
2201 /* Complex type consisting of two IEEE single precision values. */
2202 rettype
= init_complex_type (objfile
, "complex",
2203 rs6000_builtin_type (12, objfile
));
2206 /* Complex type consisting of two IEEE double precision values. */
2207 rettype
= init_complex_type (objfile
, "double complex",
2208 rs6000_builtin_type (13, objfile
));
2211 rettype
= init_integer_type (objfile
, 8, 0, "integer*1");
2214 rettype
= init_integer_type (objfile
, 16, 0, "integer*2");
2217 rettype
= init_integer_type (objfile
, 32, 0, "integer*4");
2220 rettype
= init_character_type (objfile
, 16, 0, "wchar");
2223 rettype
= init_integer_type (objfile
, 64, 0, "long long");
2226 rettype
= init_integer_type (objfile
, 64, 1, "unsigned long long");
2229 rettype
= init_integer_type (objfile
, 64, 1, "logical*8");
2232 rettype
= init_integer_type (objfile
, 64, 0, "integer*8");
2235 negative_types
[-typenum
] = rettype
;
2239 /* This page contains subroutines of read_type. */
2241 /* Wrapper around method_name_from_physname to flag a complaint
2242 if there is an error. */
2245 stabs_method_name_from_physname (const char *physname
)
2249 method_name
= method_name_from_physname (physname
);
2251 if (method_name
== NULL
)
2253 complaint (_("Method has bad physname %s\n"), physname
);
2260 /* Read member function stabs info for C++ classes. The form of each member
2263 NAME :: TYPENUM[=type definition] ARGS : PHYSNAME ;
2265 An example with two member functions is:
2267 afunc1::20=##15;:i;2A.;afunc2::20:i;2A.;
2269 For the case of overloaded operators, the format is op$::*.funcs, where
2270 $ is the CPLUS_MARKER (usually '$'), `*' holds the place for an operator
2271 name (such as `+=') and `.' marks the end of the operator name.
2273 Returns 1 for success, 0 for failure. */
2276 read_member_functions (struct stab_field_info
*fip
, const char **pp
,
2277 struct type
*type
, struct objfile
*objfile
)
2284 struct next_fnfield
*next
;
2285 struct fn_field fn_field
;
2288 struct type
*look_ahead_type
;
2289 struct next_fnfieldlist
*new_fnlist
;
2290 struct next_fnfield
*new_sublist
;
2294 /* Process each list until we find something that is not a member function
2295 or find the end of the functions. */
2299 /* We should be positioned at the start of the function name.
2300 Scan forward to find the first ':' and if it is not the
2301 first of a "::" delimiter, then this is not a member function. */
2313 look_ahead_type
= NULL
;
2316 new_fnlist
= OBSTACK_ZALLOC (&fip
->obstack
, struct next_fnfieldlist
);
2318 if ((*pp
)[0] == 'o' && (*pp
)[1] == 'p' && is_cplus_marker ((*pp
)[2]))
2320 /* This is a completely wierd case. In order to stuff in the
2321 names that might contain colons (the usual name delimiter),
2322 Mike Tiemann defined a different name format which is
2323 signalled if the identifier is "op$". In that case, the
2324 format is "op$::XXXX." where XXXX is the name. This is
2325 used for names like "+" or "=". YUUUUUUUK! FIXME! */
2326 /* This lets the user type "break operator+".
2327 We could just put in "+" as the name, but that wouldn't
2329 static char opname
[32] = "op$";
2330 char *o
= opname
+ 3;
2332 /* Skip past '::'. */
2335 STABS_CONTINUE (pp
, objfile
);
2341 main_fn_name
= savestring (opname
, o
- opname
);
2347 main_fn_name
= savestring (*pp
, p
- *pp
);
2348 /* Skip past '::'. */
2351 new_fnlist
->fn_fieldlist
.name
= main_fn_name
;
2355 new_sublist
= OBSTACK_ZALLOC (&fip
->obstack
, struct next_fnfield
);
2357 /* Check for and handle cretinous dbx symbol name continuation! */
2358 if (look_ahead_type
== NULL
)
2361 STABS_CONTINUE (pp
, objfile
);
2363 new_sublist
->fn_field
.type
= read_type (pp
, objfile
);
2366 /* Invalid symtab info for member function. */
2372 /* g++ version 1 kludge */
2373 new_sublist
->fn_field
.type
= look_ahead_type
;
2374 look_ahead_type
= NULL
;
2384 /* These are methods, not functions. */
2385 if (TYPE_CODE (new_sublist
->fn_field
.type
) == TYPE_CODE_FUNC
)
2386 TYPE_CODE (new_sublist
->fn_field
.type
) = TYPE_CODE_METHOD
;
2388 gdb_assert (TYPE_CODE (new_sublist
->fn_field
.type
)
2389 == TYPE_CODE_METHOD
);
2391 /* If this is just a stub, then we don't have the real name here. */
2392 if (TYPE_STUB (new_sublist
->fn_field
.type
))
2394 if (!TYPE_SELF_TYPE (new_sublist
->fn_field
.type
))
2395 set_type_self_type (new_sublist
->fn_field
.type
, type
);
2396 new_sublist
->fn_field
.is_stub
= 1;
2399 new_sublist
->fn_field
.physname
= savestring (*pp
, p
- *pp
);
2402 /* Set this member function's visibility fields. */
2405 case VISIBILITY_PRIVATE
:
2406 new_sublist
->fn_field
.is_private
= 1;
2408 case VISIBILITY_PROTECTED
:
2409 new_sublist
->fn_field
.is_protected
= 1;
2413 STABS_CONTINUE (pp
, objfile
);
2416 case 'A': /* Normal functions. */
2417 new_sublist
->fn_field
.is_const
= 0;
2418 new_sublist
->fn_field
.is_volatile
= 0;
2421 case 'B': /* `const' member functions. */
2422 new_sublist
->fn_field
.is_const
= 1;
2423 new_sublist
->fn_field
.is_volatile
= 0;
2426 case 'C': /* `volatile' member function. */
2427 new_sublist
->fn_field
.is_const
= 0;
2428 new_sublist
->fn_field
.is_volatile
= 1;
2431 case 'D': /* `const volatile' member function. */
2432 new_sublist
->fn_field
.is_const
= 1;
2433 new_sublist
->fn_field
.is_volatile
= 1;
2436 case '*': /* File compiled with g++ version 1 --
2442 complaint (_("const/volatile indicator missing, got '%c'"),
2452 /* virtual member function, followed by index.
2453 The sign bit is set to distinguish pointers-to-methods
2454 from virtual function indicies. Since the array is
2455 in words, the quantity must be shifted left by 1
2456 on 16 bit machine, and by 2 on 32 bit machine, forcing
2457 the sign bit out, and usable as a valid index into
2458 the array. Remove the sign bit here. */
2459 new_sublist
->fn_field
.voffset
=
2460 (0x7fffffff & read_huge_number (pp
, ';', &nbits
, 0)) + 2;
2464 STABS_CONTINUE (pp
, objfile
);
2465 if (**pp
== ';' || **pp
== '\0')
2467 /* Must be g++ version 1. */
2468 new_sublist
->fn_field
.fcontext
= 0;
2472 /* Figure out from whence this virtual function came.
2473 It may belong to virtual function table of
2474 one of its baseclasses. */
2475 look_ahead_type
= read_type (pp
, objfile
);
2478 /* g++ version 1 overloaded methods. */
2482 new_sublist
->fn_field
.fcontext
= look_ahead_type
;
2491 look_ahead_type
= NULL
;
2497 /* static member function. */
2499 int slen
= strlen (main_fn_name
);
2501 new_sublist
->fn_field
.voffset
= VOFFSET_STATIC
;
2503 /* For static member functions, we can't tell if they
2504 are stubbed, as they are put out as functions, and not as
2506 GCC v2 emits the fully mangled name if
2507 dbxout.c:flag_minimal_debug is not set, so we have to
2508 detect a fully mangled physname here and set is_stub
2509 accordingly. Fully mangled physnames in v2 start with
2510 the member function name, followed by two underscores.
2511 GCC v3 currently always emits stubbed member functions,
2512 but with fully mangled physnames, which start with _Z. */
2513 if (!(strncmp (new_sublist
->fn_field
.physname
,
2514 main_fn_name
, slen
) == 0
2515 && new_sublist
->fn_field
.physname
[slen
] == '_'
2516 && new_sublist
->fn_field
.physname
[slen
+ 1] == '_'))
2518 new_sublist
->fn_field
.is_stub
= 1;
2525 complaint (_("member function type missing, got '%c'"),
2527 /* Normal member function. */
2531 /* normal member function. */
2532 new_sublist
->fn_field
.voffset
= 0;
2533 new_sublist
->fn_field
.fcontext
= 0;
2537 new_sublist
->next
= sublist
;
2538 sublist
= new_sublist
;
2540 STABS_CONTINUE (pp
, objfile
);
2542 while (**pp
!= ';' && **pp
!= '\0');
2545 STABS_CONTINUE (pp
, objfile
);
2547 /* Skip GCC 3.X member functions which are duplicates of the callable
2548 constructor/destructor. */
2549 if (strcmp_iw (main_fn_name
, "__base_ctor ") == 0
2550 || strcmp_iw (main_fn_name
, "__base_dtor ") == 0
2551 || strcmp (main_fn_name
, "__deleting_dtor") == 0)
2553 xfree (main_fn_name
);
2557 int has_destructor
= 0, has_other
= 0;
2559 struct next_fnfield
*tmp_sublist
;
2561 /* Various versions of GCC emit various mostly-useless
2562 strings in the name field for special member functions.
2564 For stub methods, we need to defer correcting the name
2565 until we are ready to unstub the method, because the current
2566 name string is used by gdb_mangle_name. The only stub methods
2567 of concern here are GNU v2 operators; other methods have their
2568 names correct (see caveat below).
2570 For non-stub methods, in GNU v3, we have a complete physname.
2571 Therefore we can safely correct the name now. This primarily
2572 affects constructors and destructors, whose name will be
2573 __comp_ctor or __comp_dtor instead of Foo or ~Foo. Cast
2574 operators will also have incorrect names; for instance,
2575 "operator int" will be named "operator i" (i.e. the type is
2578 For non-stub methods in GNU v2, we have no easy way to
2579 know if we have a complete physname or not. For most
2580 methods the result depends on the platform (if CPLUS_MARKER
2581 can be `$' or `.', it will use minimal debug information, or
2582 otherwise the full physname will be included).
2584 Rather than dealing with this, we take a different approach.
2585 For v3 mangled names, we can use the full physname; for v2,
2586 we use cplus_demangle_opname (which is actually v2 specific),
2587 because the only interesting names are all operators - once again
2588 barring the caveat below. Skip this process if any method in the
2589 group is a stub, to prevent our fouling up the workings of
2592 The caveat: GCC 2.95.x (and earlier?) put constructors and
2593 destructors in the same method group. We need to split this
2594 into two groups, because they should have different names.
2595 So for each method group we check whether it contains both
2596 routines whose physname appears to be a destructor (the physnames
2597 for and destructors are always provided, due to quirks in v2
2598 mangling) and routines whose physname does not appear to be a
2599 destructor. If so then we break up the list into two halves.
2600 Even if the constructors and destructors aren't in the same group
2601 the destructor will still lack the leading tilde, so that also
2604 So, to summarize what we expect and handle here:
2606 Given Given Real Real Action
2607 method name physname physname method name
2609 __opi [none] __opi__3Foo operator int opname
2611 Foo _._3Foo _._3Foo ~Foo separate and
2613 operator i _ZN3FoocviEv _ZN3FoocviEv operator int demangle
2614 __comp_ctor _ZN3FooC1ERKS_ _ZN3FooC1ERKS_ Foo demangle
2617 tmp_sublist
= sublist
;
2618 while (tmp_sublist
!= NULL
)
2620 if (tmp_sublist
->fn_field
.physname
[0] == '_'
2621 && tmp_sublist
->fn_field
.physname
[1] == 'Z')
2624 if (is_destructor_name (tmp_sublist
->fn_field
.physname
))
2629 tmp_sublist
= tmp_sublist
->next
;
2632 if (has_destructor
&& has_other
)
2634 struct next_fnfieldlist
*destr_fnlist
;
2635 struct next_fnfield
*last_sublist
;
2637 /* Create a new fn_fieldlist for the destructors. */
2639 destr_fnlist
= OBSTACK_ZALLOC (&fip
->obstack
,
2640 struct next_fnfieldlist
);
2642 destr_fnlist
->fn_fieldlist
.name
2643 = obconcat (&objfile
->objfile_obstack
, "~",
2644 new_fnlist
->fn_fieldlist
.name
, (char *) NULL
);
2646 destr_fnlist
->fn_fieldlist
.fn_fields
=
2647 XOBNEWVEC (&objfile
->objfile_obstack
,
2648 struct fn_field
, has_destructor
);
2649 memset (destr_fnlist
->fn_fieldlist
.fn_fields
, 0,
2650 sizeof (struct fn_field
) * has_destructor
);
2651 tmp_sublist
= sublist
;
2652 last_sublist
= NULL
;
2654 while (tmp_sublist
!= NULL
)
2656 if (!is_destructor_name (tmp_sublist
->fn_field
.physname
))
2658 tmp_sublist
= tmp_sublist
->next
;
2662 destr_fnlist
->fn_fieldlist
.fn_fields
[i
++]
2663 = tmp_sublist
->fn_field
;
2665 last_sublist
->next
= tmp_sublist
->next
;
2667 sublist
= tmp_sublist
->next
;
2668 last_sublist
= tmp_sublist
;
2669 tmp_sublist
= tmp_sublist
->next
;
2672 destr_fnlist
->fn_fieldlist
.length
= has_destructor
;
2673 destr_fnlist
->next
= fip
->fnlist
;
2674 fip
->fnlist
= destr_fnlist
;
2676 length
-= has_destructor
;
2680 /* v3 mangling prevents the use of abbreviated physnames,
2681 so we can do this here. There are stubbed methods in v3
2683 - in -gstabs instead of -gstabs+
2684 - or for static methods, which are output as a function type
2685 instead of a method type. */
2686 char *new_method_name
=
2687 stabs_method_name_from_physname (sublist
->fn_field
.physname
);
2689 if (new_method_name
!= NULL
2690 && strcmp (new_method_name
,
2691 new_fnlist
->fn_fieldlist
.name
) != 0)
2693 new_fnlist
->fn_fieldlist
.name
= new_method_name
;
2694 xfree (main_fn_name
);
2697 xfree (new_method_name
);
2699 else if (has_destructor
&& new_fnlist
->fn_fieldlist
.name
[0] != '~')
2701 new_fnlist
->fn_fieldlist
.name
=
2702 obconcat (&objfile
->objfile_obstack
,
2703 "~", main_fn_name
, (char *)NULL
);
2704 xfree (main_fn_name
);
2707 new_fnlist
->fn_fieldlist
.fn_fields
2708 = OBSTACK_CALLOC (&objfile
->objfile_obstack
, length
, fn_field
);
2709 for (i
= length
; (i
--, sublist
); sublist
= sublist
->next
)
2711 new_fnlist
->fn_fieldlist
.fn_fields
[i
] = sublist
->fn_field
;
2714 new_fnlist
->fn_fieldlist
.length
= length
;
2715 new_fnlist
->next
= fip
->fnlist
;
2716 fip
->fnlist
= new_fnlist
;
2723 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
2724 TYPE_FN_FIELDLISTS (type
) = (struct fn_fieldlist
*)
2725 TYPE_ALLOC (type
, sizeof (struct fn_fieldlist
) * nfn_fields
);
2726 memset (TYPE_FN_FIELDLISTS (type
), 0,
2727 sizeof (struct fn_fieldlist
) * nfn_fields
);
2728 TYPE_NFN_FIELDS (type
) = nfn_fields
;
2734 /* Special GNU C++ name.
2736 Returns 1 for success, 0 for failure. "failure" means that we can't
2737 keep parsing and it's time for error_type(). */
2740 read_cpp_abbrev (struct stab_field_info
*fip
, const char **pp
,
2741 struct type
*type
, struct objfile
*objfile
)
2746 struct type
*context
;
2756 /* At this point, *pp points to something like "22:23=*22...",
2757 where the type number before the ':' is the "context" and
2758 everything after is a regular type definition. Lookup the
2759 type, find it's name, and construct the field name. */
2761 context
= read_type (pp
, objfile
);
2765 case 'f': /* $vf -- a virtual function table pointer */
2766 name
= TYPE_NAME (context
);
2771 fip
->list
->field
.name
= obconcat (&objfile
->objfile_obstack
,
2772 vptr_name
, name
, (char *) NULL
);
2775 case 'b': /* $vb -- a virtual bsomethingorother */
2776 name
= TYPE_NAME (context
);
2779 complaint (_("C++ abbreviated type name "
2780 "unknown at symtab pos %d"),
2784 fip
->list
->field
.name
= obconcat (&objfile
->objfile_obstack
, vb_name
,
2785 name
, (char *) NULL
);
2789 invalid_cpp_abbrev_complaint (*pp
);
2790 fip
->list
->field
.name
= obconcat (&objfile
->objfile_obstack
,
2791 "INVALID_CPLUSPLUS_ABBREV",
2796 /* At this point, *pp points to the ':'. Skip it and read the
2802 invalid_cpp_abbrev_complaint (*pp
);
2805 fip
->list
->field
.type
= read_type (pp
, objfile
);
2807 (*pp
)++; /* Skip the comma. */
2814 SET_FIELD_BITPOS (fip
->list
->field
,
2815 read_huge_number (pp
, ';', &nbits
, 0));
2819 /* This field is unpacked. */
2820 FIELD_BITSIZE (fip
->list
->field
) = 0;
2821 fip
->list
->visibility
= VISIBILITY_PRIVATE
;
2825 invalid_cpp_abbrev_complaint (*pp
);
2826 /* We have no idea what syntax an unrecognized abbrev would have, so
2827 better return 0. If we returned 1, we would need to at least advance
2828 *pp to avoid an infinite loop. */
2835 read_one_struct_field (struct stab_field_info
*fip
, const char **pp
,
2836 const char *p
, struct type
*type
,
2837 struct objfile
*objfile
)
2839 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
2841 fip
->list
->field
.name
2842 = obstack_strndup (&objfile
->objfile_obstack
, *pp
, p
- *pp
);
2845 /* This means we have a visibility for a field coming. */
2849 fip
->list
->visibility
= *(*pp
)++;
2853 /* normal dbx-style format, no explicit visibility */
2854 fip
->list
->visibility
= VISIBILITY_PUBLIC
;
2857 fip
->list
->field
.type
= read_type (pp
, objfile
);
2862 /* Possible future hook for nested types. */
2865 fip
->list
->field
.bitpos
= (long) -2; /* nested type */
2875 /* Static class member. */
2876 SET_FIELD_PHYSNAME (fip
->list
->field
, savestring (*pp
, p
- *pp
));
2880 else if (**pp
!= ',')
2882 /* Bad structure-type format. */
2883 stabs_general_complaint ("bad structure-type format");
2887 (*pp
)++; /* Skip the comma. */
2892 SET_FIELD_BITPOS (fip
->list
->field
,
2893 read_huge_number (pp
, ',', &nbits
, 0));
2896 stabs_general_complaint ("bad structure-type format");
2899 FIELD_BITSIZE (fip
->list
->field
) = read_huge_number (pp
, ';', &nbits
, 0);
2902 stabs_general_complaint ("bad structure-type format");
2907 if (FIELD_BITPOS (fip
->list
->field
) == 0
2908 && FIELD_BITSIZE (fip
->list
->field
) == 0)
2910 /* This can happen in two cases: (1) at least for gcc 2.4.5 or so,
2911 it is a field which has been optimized out. The correct stab for
2912 this case is to use VISIBILITY_IGNORE, but that is a recent
2913 invention. (2) It is a 0-size array. For example
2914 union { int num; char str[0]; } foo. Printing _("<no value>" for
2915 str in "p foo" is OK, since foo.str (and thus foo.str[3])
2916 will continue to work, and a 0-size array as a whole doesn't
2917 have any contents to print.
2919 I suspect this probably could also happen with gcc -gstabs (not
2920 -gstabs+) for static fields, and perhaps other C++ extensions.
2921 Hopefully few people use -gstabs with gdb, since it is intended
2922 for dbx compatibility. */
2924 /* Ignore this field. */
2925 fip
->list
->visibility
= VISIBILITY_IGNORE
;
2929 /* Detect an unpacked field and mark it as such.
2930 dbx gives a bit size for all fields.
2931 Note that forward refs cannot be packed,
2932 and treat enums as if they had the width of ints. */
2934 struct type
*field_type
= check_typedef (FIELD_TYPE (fip
->list
->field
));
2936 if (TYPE_CODE (field_type
) != TYPE_CODE_INT
2937 && TYPE_CODE (field_type
) != TYPE_CODE_RANGE
2938 && TYPE_CODE (field_type
) != TYPE_CODE_BOOL
2939 && TYPE_CODE (field_type
) != TYPE_CODE_ENUM
)
2941 FIELD_BITSIZE (fip
->list
->field
) = 0;
2943 if ((FIELD_BITSIZE (fip
->list
->field
)
2944 == TARGET_CHAR_BIT
* TYPE_LENGTH (field_type
)
2945 || (TYPE_CODE (field_type
) == TYPE_CODE_ENUM
2946 && FIELD_BITSIZE (fip
->list
->field
)
2947 == gdbarch_int_bit (gdbarch
))
2950 FIELD_BITPOS (fip
->list
->field
) % 8 == 0)
2952 FIELD_BITSIZE (fip
->list
->field
) = 0;
2958 /* Read struct or class data fields. They have the form:
2960 NAME : [VISIBILITY] TYPENUM , BITPOS , BITSIZE ;
2962 At the end, we see a semicolon instead of a field.
2964 In C++, this may wind up being NAME:?TYPENUM:PHYSNAME; for
2967 The optional VISIBILITY is one of:
2969 '/0' (VISIBILITY_PRIVATE)
2970 '/1' (VISIBILITY_PROTECTED)
2971 '/2' (VISIBILITY_PUBLIC)
2972 '/9' (VISIBILITY_IGNORE)
2974 or nothing, for C style fields with public visibility.
2976 Returns 1 for success, 0 for failure. */
2979 read_struct_fields (struct stab_field_info
*fip
, const char **pp
,
2980 struct type
*type
, struct objfile
*objfile
)
2983 struct nextfield
*newobj
;
2985 /* We better set p right now, in case there are no fields at all... */
2989 /* Read each data member type until we find the terminating ';' at the end of
2990 the data member list, or break for some other reason such as finding the
2991 start of the member function list. */
2992 /* Stab string for structure/union does not end with two ';' in
2993 SUN C compiler 5.3 i.e. F6U2, hence check for end of string. */
2995 while (**pp
!= ';' && **pp
!= '\0')
2997 STABS_CONTINUE (pp
, objfile
);
2998 /* Get space to record the next field's data. */
2999 newobj
= OBSTACK_ZALLOC (&fip
->obstack
, struct nextfield
);
3001 newobj
->next
= fip
->list
;
3004 /* Get the field name. */
3007 /* If is starts with CPLUS_MARKER it is a special abbreviation,
3008 unless the CPLUS_MARKER is followed by an underscore, in
3009 which case it is just the name of an anonymous type, which we
3010 should handle like any other type name. */
3012 if (is_cplus_marker (p
[0]) && p
[1] != '_')
3014 if (!read_cpp_abbrev (fip
, pp
, type
, objfile
))
3019 /* Look for the ':' that separates the field name from the field
3020 values. Data members are delimited by a single ':', while member
3021 functions are delimited by a pair of ':'s. When we hit the member
3022 functions (if any), terminate scan loop and return. */
3024 while (*p
!= ':' && *p
!= '\0')
3031 /* Check to see if we have hit the member functions yet. */
3036 read_one_struct_field (fip
, pp
, p
, type
, objfile
);
3038 if (p
[0] == ':' && p
[1] == ':')
3040 /* (the deleted) chill the list of fields: the last entry (at
3041 the head) is a partially constructed entry which we now
3043 fip
->list
= fip
->list
->next
;
3048 /* The stabs for C++ derived classes contain baseclass information which
3049 is marked by a '!' character after the total size. This function is
3050 called when we encounter the baseclass marker, and slurps up all the
3051 baseclass information.
3053 Immediately following the '!' marker is the number of base classes that
3054 the class is derived from, followed by information for each base class.
3055 For each base class, there are two visibility specifiers, a bit offset
3056 to the base class information within the derived class, a reference to
3057 the type for the base class, and a terminating semicolon.
3059 A typical example, with two base classes, would be "!2,020,19;0264,21;".
3061 Baseclass information marker __________________|| | | | | | |
3062 Number of baseclasses __________________________| | | | | | |
3063 Visibility specifiers (2) ________________________| | | | | |
3064 Offset in bits from start of class _________________| | | | |
3065 Type number for base class ___________________________| | | |
3066 Visibility specifiers (2) _______________________________| | |
3067 Offset in bits from start of class ________________________| |
3068 Type number of base class ____________________________________|
3070 Return 1 for success, 0 for (error-type-inducing) failure. */
3076 read_baseclasses (struct stab_field_info
*fip
, const char **pp
,
3077 struct type
*type
, struct objfile
*objfile
)
3080 struct nextfield
*newobj
;
3088 /* Skip the '!' baseclass information marker. */
3092 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
3096 TYPE_N_BASECLASSES (type
) = read_huge_number (pp
, ',', &nbits
, 0);
3102 /* Some stupid compilers have trouble with the following, so break
3103 it up into simpler expressions. */
3104 TYPE_FIELD_VIRTUAL_BITS (type
) = (B_TYPE
*)
3105 TYPE_ALLOC (type
, B_BYTES (TYPE_N_BASECLASSES (type
)));
3108 int num_bytes
= B_BYTES (TYPE_N_BASECLASSES (type
));
3111 pointer
= (char *) TYPE_ALLOC (type
, num_bytes
);
3112 TYPE_FIELD_VIRTUAL_BITS (type
) = (B_TYPE
*) pointer
;
3116 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type
), TYPE_N_BASECLASSES (type
));
3118 for (i
= 0; i
< TYPE_N_BASECLASSES (type
); i
++)
3120 newobj
= OBSTACK_ZALLOC (&fip
->obstack
, struct nextfield
);
3122 newobj
->next
= fip
->list
;
3124 FIELD_BITSIZE (newobj
->field
) = 0; /* This should be an unpacked
3127 STABS_CONTINUE (pp
, objfile
);
3131 /* Nothing to do. */
3134 SET_TYPE_FIELD_VIRTUAL (type
, i
);
3137 /* Unknown character. Complain and treat it as non-virtual. */
3139 complaint (_("Unknown virtual character `%c' for baseclass"),
3145 newobj
->visibility
= *(*pp
)++;
3146 switch (newobj
->visibility
)
3148 case VISIBILITY_PRIVATE
:
3149 case VISIBILITY_PROTECTED
:
3150 case VISIBILITY_PUBLIC
:
3153 /* Bad visibility format. Complain and treat it as
3156 complaint (_("Unknown visibility `%c' for baseclass"),
3157 newobj
->visibility
);
3158 newobj
->visibility
= VISIBILITY_PUBLIC
;
3165 /* The remaining value is the bit offset of the portion of the object
3166 corresponding to this baseclass. Always zero in the absence of
3167 multiple inheritance. */
3169 SET_FIELD_BITPOS (newobj
->field
, read_huge_number (pp
, ',', &nbits
, 0));
3174 /* The last piece of baseclass information is the type of the
3175 base class. Read it, and remember it's type name as this
3178 newobj
->field
.type
= read_type (pp
, objfile
);
3179 newobj
->field
.name
= TYPE_NAME (newobj
->field
.type
);
3181 /* Skip trailing ';' and bump count of number of fields seen. */
3190 /* The tail end of stabs for C++ classes that contain a virtual function
3191 pointer contains a tilde, a %, and a type number.
3192 The type number refers to the base class (possibly this class itself) which
3193 contains the vtable pointer for the current class.
3195 This function is called when we have parsed all the method declarations,
3196 so we can look for the vptr base class info. */
3199 read_tilde_fields (struct stab_field_info
*fip
, const char **pp
,
3200 struct type
*type
, struct objfile
*objfile
)
3204 STABS_CONTINUE (pp
, objfile
);
3206 /* If we are positioned at a ';', then skip it. */
3216 if (**pp
== '=' || **pp
== '+' || **pp
== '-')
3218 /* Obsolete flags that used to indicate the presence
3219 of constructors and/or destructors. */
3223 /* Read either a '%' or the final ';'. */
3224 if (*(*pp
)++ == '%')
3226 /* The next number is the type number of the base class
3227 (possibly our own class) which supplies the vtable for
3228 this class. Parse it out, and search that class to find
3229 its vtable pointer, and install those into TYPE_VPTR_BASETYPE
3230 and TYPE_VPTR_FIELDNO. */
3235 t
= read_type (pp
, objfile
);
3237 while (*p
!= '\0' && *p
!= ';')
3243 /* Premature end of symbol. */
3247 set_type_vptr_basetype (type
, t
);
3248 if (type
== t
) /* Our own class provides vtbl ptr. */
3250 for (i
= TYPE_NFIELDS (t
) - 1;
3251 i
>= TYPE_N_BASECLASSES (t
);
3254 const char *name
= TYPE_FIELD_NAME (t
, i
);
3256 if (!strncmp (name
, vptr_name
, sizeof (vptr_name
) - 2)
3257 && is_cplus_marker (name
[sizeof (vptr_name
) - 2]))
3259 set_type_vptr_fieldno (type
, i
);
3263 /* Virtual function table field not found. */
3264 complaint (_("virtual function table pointer "
3265 "not found when defining class `%s'"),
3271 set_type_vptr_fieldno (type
, TYPE_VPTR_FIELDNO (t
));
3282 attach_fn_fields_to_type (struct stab_field_info
*fip
, struct type
*type
)
3286 for (n
= TYPE_NFN_FIELDS (type
);
3287 fip
->fnlist
!= NULL
;
3288 fip
->fnlist
= fip
->fnlist
->next
)
3290 --n
; /* Circumvent Sun3 compiler bug. */
3291 TYPE_FN_FIELDLISTS (type
)[n
] = fip
->fnlist
->fn_fieldlist
;
3296 /* Create the vector of fields, and record how big it is.
3297 We need this info to record proper virtual function table information
3298 for this class's virtual functions. */
3301 attach_fields_to_type (struct stab_field_info
*fip
, struct type
*type
,
3302 struct objfile
*objfile
)
3305 int non_public_fields
= 0;
3306 struct nextfield
*scan
;
3308 /* Count up the number of fields that we have, as well as taking note of
3309 whether or not there are any non-public fields, which requires us to
3310 allocate and build the private_field_bits and protected_field_bits
3313 for (scan
= fip
->list
; scan
!= NULL
; scan
= scan
->next
)
3316 if (scan
->visibility
!= VISIBILITY_PUBLIC
)
3318 non_public_fields
++;
3322 /* Now we know how many fields there are, and whether or not there are any
3323 non-public fields. Record the field count, allocate space for the
3324 array of fields, and create blank visibility bitfields if necessary. */
3326 TYPE_NFIELDS (type
) = nfields
;
3327 TYPE_FIELDS (type
) = (struct field
*)
3328 TYPE_ALLOC (type
, sizeof (struct field
) * nfields
);
3329 memset (TYPE_FIELDS (type
), 0, sizeof (struct field
) * nfields
);
3331 if (non_public_fields
)
3333 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
3335 TYPE_FIELD_PRIVATE_BITS (type
) =
3336 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
3337 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type
), nfields
);
3339 TYPE_FIELD_PROTECTED_BITS (type
) =
3340 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
3341 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type
), nfields
);
3343 TYPE_FIELD_IGNORE_BITS (type
) =
3344 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
3345 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type
), nfields
);
3348 /* Copy the saved-up fields into the field vector. Start from the
3349 head of the list, adding to the tail of the field array, so that
3350 they end up in the same order in the array in which they were
3351 added to the list. */
3353 while (nfields
-- > 0)
3355 TYPE_FIELD (type
, nfields
) = fip
->list
->field
;
3356 switch (fip
->list
->visibility
)
3358 case VISIBILITY_PRIVATE
:
3359 SET_TYPE_FIELD_PRIVATE (type
, nfields
);
3362 case VISIBILITY_PROTECTED
:
3363 SET_TYPE_FIELD_PROTECTED (type
, nfields
);
3366 case VISIBILITY_IGNORE
:
3367 SET_TYPE_FIELD_IGNORE (type
, nfields
);
3370 case VISIBILITY_PUBLIC
:
3374 /* Unknown visibility. Complain and treat it as public. */
3376 complaint (_("Unknown visibility `%c' for field"),
3377 fip
->list
->visibility
);
3381 fip
->list
= fip
->list
->next
;
3387 /* Complain that the compiler has emitted more than one definition for the
3388 structure type TYPE. */
3390 complain_about_struct_wipeout (struct type
*type
)
3392 const char *name
= "";
3393 const char *kind
= "";
3395 if (TYPE_NAME (type
))
3397 name
= TYPE_NAME (type
);
3398 switch (TYPE_CODE (type
))
3400 case TYPE_CODE_STRUCT
: kind
= "struct "; break;
3401 case TYPE_CODE_UNION
: kind
= "union "; break;
3402 case TYPE_CODE_ENUM
: kind
= "enum "; break;
3412 complaint (_("struct/union type gets multiply defined: %s%s"), kind
, name
);
3415 /* Set the length for all variants of a same main_type, which are
3416 connected in the closed chain.
3418 This is something that needs to be done when a type is defined *after*
3419 some cross references to this type have already been read. Consider
3420 for instance the following scenario where we have the following two
3423 .stabs "t:p(0,21)=*(0,22)=k(0,23)=xsdummy:",160,0,28,-24
3424 .stabs "dummy:T(0,23)=s16x:(0,1),0,3[...]"
3426 A stubbed version of type dummy is created while processing the first
3427 stabs entry. The length of that type is initially set to zero, since
3428 it is unknown at this point. Also, a "constant" variation of type
3429 "dummy" is created as well (this is the "(0,22)=k(0,23)" section of
3432 The second stabs entry allows us to replace the stubbed definition
3433 with the real definition. However, we still need to adjust the length
3434 of the "constant" variation of that type, as its length was left
3435 untouched during the main type replacement... */
3438 set_length_in_type_chain (struct type
*type
)
3440 struct type
*ntype
= TYPE_CHAIN (type
);
3442 while (ntype
!= type
)
3444 if (TYPE_LENGTH(ntype
) == 0)
3445 TYPE_LENGTH (ntype
) = TYPE_LENGTH (type
);
3447 complain_about_struct_wipeout (ntype
);
3448 ntype
= TYPE_CHAIN (ntype
);
3452 /* Read the description of a structure (or union type) and return an object
3453 describing the type.
3455 PP points to a character pointer that points to the next unconsumed token
3456 in the stabs string. For example, given stabs "A:T4=s4a:1,0,32;;",
3457 *PP will point to "4a:1,0,32;;".
3459 TYPE points to an incomplete type that needs to be filled in.
3461 OBJFILE points to the current objfile from which the stabs information is
3462 being read. (Note that it is redundant in that TYPE also contains a pointer
3463 to this same objfile, so it might be a good idea to eliminate it. FIXME).
3466 static struct type
*
3467 read_struct_type (const char **pp
, struct type
*type
, enum type_code type_code
,
3468 struct objfile
*objfile
)
3470 struct stab_field_info fi
;
3472 /* When describing struct/union/class types in stabs, G++ always drops
3473 all qualifications from the name. So if you've got:
3474 struct A { ... struct B { ... }; ... };
3475 then G++ will emit stabs for `struct A::B' that call it simply
3476 `struct B'. Obviously, if you've got a real top-level definition for
3477 `struct B', or other nested definitions, this is going to cause
3480 Obviously, GDB can't fix this by itself, but it can at least avoid
3481 scribbling on existing structure type objects when new definitions
3483 if (! (TYPE_CODE (type
) == TYPE_CODE_UNDEF
3484 || TYPE_STUB (type
)))
3486 complain_about_struct_wipeout (type
);
3488 /* It's probably best to return the type unchanged. */
3492 INIT_CPLUS_SPECIFIC (type
);
3493 TYPE_CODE (type
) = type_code
;
3494 TYPE_STUB (type
) = 0;
3496 /* First comes the total size in bytes. */
3501 TYPE_LENGTH (type
) = read_huge_number (pp
, 0, &nbits
, 0);
3503 return error_type (pp
, objfile
);
3504 set_length_in_type_chain (type
);
3507 /* Now read the baseclasses, if any, read the regular C struct or C++
3508 class member fields, attach the fields to the type, read the C++
3509 member functions, attach them to the type, and then read any tilde
3510 field (baseclass specifier for the class holding the main vtable). */
3512 if (!read_baseclasses (&fi
, pp
, type
, objfile
)
3513 || !read_struct_fields (&fi
, pp
, type
, objfile
)
3514 || !attach_fields_to_type (&fi
, type
, objfile
)
3515 || !read_member_functions (&fi
, pp
, type
, objfile
)
3516 || !attach_fn_fields_to_type (&fi
, type
)
3517 || !read_tilde_fields (&fi
, pp
, type
, objfile
))
3519 type
= error_type (pp
, objfile
);
3525 /* Read a definition of an array type,
3526 and create and return a suitable type object.
3527 Also creates a range type which represents the bounds of that
3530 static struct type
*
3531 read_array_type (const char **pp
, struct type
*type
,
3532 struct objfile
*objfile
)
3534 struct type
*index_type
, *element_type
, *range_type
;
3539 /* Format of an array type:
3540 "ar<index type>;lower;upper;<array_contents_type>".
3541 OS9000: "arlower,upper;<array_contents_type>".
3543 Fortran adjustable arrays use Adigits or Tdigits for lower or upper;
3544 for these, produce a type like float[][]. */
3547 index_type
= read_type (pp
, objfile
);
3549 /* Improper format of array type decl. */
3550 return error_type (pp
, objfile
);
3554 if (!(**pp
>= '0' && **pp
<= '9') && **pp
!= '-')
3559 lower
= read_huge_number (pp
, ';', &nbits
, 0);
3562 return error_type (pp
, objfile
);
3564 if (!(**pp
>= '0' && **pp
<= '9') && **pp
!= '-')
3569 upper
= read_huge_number (pp
, ';', &nbits
, 0);
3571 return error_type (pp
, objfile
);
3573 element_type
= read_type (pp
, objfile
);
3582 create_static_range_type (NULL
, index_type
, lower
, upper
);
3583 type
= create_array_type (type
, element_type
, range_type
);
3589 /* Read a definition of an enumeration type,
3590 and create and return a suitable type object.
3591 Also defines the symbols that represent the values of the type. */
3593 static struct type
*
3594 read_enum_type (const char **pp
, struct type
*type
,
3595 struct objfile
*objfile
)
3597 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
3603 struct pending
**symlist
;
3604 struct pending
*osyms
, *syms
;
3607 int unsigned_enum
= 1;
3610 /* FIXME! The stabs produced by Sun CC merrily define things that ought
3611 to be file-scope, between N_FN entries, using N_LSYM. What's a mother
3612 to do? For now, force all enum values to file scope. */
3613 if (within_function
)
3614 symlist
= get_local_symbols ();
3617 symlist
= get_file_symbols ();
3619 o_nsyms
= osyms
? osyms
->nsyms
: 0;
3621 /* The aix4 compiler emits an extra field before the enum members;
3622 my guess is it's a type of some sort. Just ignore it. */
3625 /* Skip over the type. */
3629 /* Skip over the colon. */
3633 /* Read the value-names and their values.
3634 The input syntax is NAME:VALUE,NAME:VALUE, and so on.
3635 A semicolon or comma instead of a NAME means the end. */
3636 while (**pp
&& **pp
!= ';' && **pp
!= ',')
3638 STABS_CONTINUE (pp
, objfile
);
3642 name
= obstack_strndup (&objfile
->objfile_obstack
, *pp
, p
- *pp
);
3644 n
= read_huge_number (pp
, ',', &nbits
, 0);
3646 return error_type (pp
, objfile
);
3648 sym
= allocate_symbol (objfile
);
3649 SYMBOL_SET_LINKAGE_NAME (sym
, name
);
3650 SYMBOL_SET_LANGUAGE (sym
, get_current_subfile ()->language
,
3651 &objfile
->objfile_obstack
);
3652 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST
;
3653 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
3654 SYMBOL_VALUE (sym
) = n
;
3657 add_symbol_to_list (sym
, symlist
);
3662 (*pp
)++; /* Skip the semicolon. */
3664 /* Now fill in the fields of the type-structure. */
3666 TYPE_LENGTH (type
) = gdbarch_int_bit (gdbarch
) / HOST_CHAR_BIT
;
3667 set_length_in_type_chain (type
);
3668 TYPE_CODE (type
) = TYPE_CODE_ENUM
;
3669 TYPE_STUB (type
) = 0;
3671 TYPE_UNSIGNED (type
) = 1;
3672 TYPE_NFIELDS (type
) = nsyms
;
3673 TYPE_FIELDS (type
) = (struct field
*)
3674 TYPE_ALLOC (type
, sizeof (struct field
) * nsyms
);
3675 memset (TYPE_FIELDS (type
), 0, sizeof (struct field
) * nsyms
);
3677 /* Find the symbols for the values and put them into the type.
3678 The symbols can be found in the symlist that we put them on
3679 to cause them to be defined. osyms contains the old value
3680 of that symlist; everything up to there was defined by us. */
3681 /* Note that we preserve the order of the enum constants, so
3682 that in something like "enum {FOO, LAST_THING=FOO}" we print
3683 FOO, not LAST_THING. */
3685 for (syms
= *symlist
, n
= nsyms
- 1; syms
; syms
= syms
->next
)
3687 int last
= syms
== osyms
? o_nsyms
: 0;
3688 int j
= syms
->nsyms
;
3690 for (; --j
>= last
; --n
)
3692 struct symbol
*xsym
= syms
->symbol
[j
];
3694 SYMBOL_TYPE (xsym
) = type
;
3695 TYPE_FIELD_NAME (type
, n
) = SYMBOL_LINKAGE_NAME (xsym
);
3696 SET_FIELD_ENUMVAL (TYPE_FIELD (type
, n
), SYMBOL_VALUE (xsym
));
3697 TYPE_FIELD_BITSIZE (type
, n
) = 0;
3706 /* Sun's ACC uses a somewhat saner method for specifying the builtin
3707 typedefs in every file (for int, long, etc):
3709 type = b <signed> <width> <format type>; <offset>; <nbits>
3711 optional format type = c or b for char or boolean.
3712 offset = offset from high order bit to start bit of type.
3713 width is # bytes in object of this type, nbits is # bits in type.
3715 The width/offset stuff appears to be for small objects stored in
3716 larger ones (e.g. `shorts' in `int' registers). We ignore it for now,
3719 static struct type
*
3720 read_sun_builtin_type (const char **pp
, int typenums
[2], struct objfile
*objfile
)
3725 int boolean_type
= 0;
3736 return error_type (pp
, objfile
);
3740 /* For some odd reason, all forms of char put a c here. This is strange
3741 because no other type has this honor. We can safely ignore this because
3742 we actually determine 'char'acterness by the number of bits specified in
3744 Boolean forms, e.g Fortran logical*X, put a b here. */
3748 else if (**pp
== 'b')
3754 /* The first number appears to be the number of bytes occupied
3755 by this type, except that unsigned short is 4 instead of 2.
3756 Since this information is redundant with the third number,
3757 we will ignore it. */
3758 read_huge_number (pp
, ';', &nbits
, 0);
3760 return error_type (pp
, objfile
);
3762 /* The second number is always 0, so ignore it too. */
3763 read_huge_number (pp
, ';', &nbits
, 0);
3765 return error_type (pp
, objfile
);
3767 /* The third number is the number of bits for this type. */
3768 type_bits
= read_huge_number (pp
, 0, &nbits
, 0);
3770 return error_type (pp
, objfile
);
3771 /* The type *should* end with a semicolon. If it are embedded
3772 in a larger type the semicolon may be the only way to know where
3773 the type ends. If this type is at the end of the stabstring we
3774 can deal with the omitted semicolon (but we don't have to like
3775 it). Don't bother to complain(), Sun's compiler omits the semicolon
3782 struct type
*type
= init_type (objfile
, TYPE_CODE_VOID
,
3783 TARGET_CHAR_BIT
, NULL
);
3785 TYPE_UNSIGNED (type
) = 1;
3790 return init_boolean_type (objfile
, type_bits
, unsigned_type
, NULL
);
3792 return init_integer_type (objfile
, type_bits
, unsigned_type
, NULL
);
3795 static struct type
*
3796 read_sun_floating_type (const char **pp
, int typenums
[2],
3797 struct objfile
*objfile
)
3802 struct type
*rettype
;
3804 /* The first number has more details about the type, for example
3806 details
= read_huge_number (pp
, ';', &nbits
, 0);
3808 return error_type (pp
, objfile
);
3810 /* The second number is the number of bytes occupied by this type. */
3811 nbytes
= read_huge_number (pp
, ';', &nbits
, 0);
3813 return error_type (pp
, objfile
);
3815 nbits
= nbytes
* TARGET_CHAR_BIT
;
3817 if (details
== NF_COMPLEX
|| details
== NF_COMPLEX16
3818 || details
== NF_COMPLEX32
)
3820 rettype
= dbx_init_float_type (objfile
, nbits
/ 2);
3821 return init_complex_type (objfile
, NULL
, rettype
);
3824 return dbx_init_float_type (objfile
, nbits
);
3827 /* Read a number from the string pointed to by *PP.
3828 The value of *PP is advanced over the number.
3829 If END is nonzero, the character that ends the
3830 number must match END, or an error happens;
3831 and that character is skipped if it does match.
3832 If END is zero, *PP is left pointing to that character.
3834 If TWOS_COMPLEMENT_BITS is set to a strictly positive value and if
3835 the number is represented in an octal representation, assume that
3836 it is represented in a 2's complement representation with a size of
3837 TWOS_COMPLEMENT_BITS.
3839 If the number fits in a long, set *BITS to 0 and return the value.
3840 If not, set *BITS to be the number of bits in the number and return 0.
3842 If encounter garbage, set *BITS to -1 and return 0. */
3845 read_huge_number (const char **pp
, int end
, int *bits
,
3846 int twos_complement_bits
)
3848 const char *p
= *pp
;
3857 int twos_complement_representation
= 0;
3865 /* Leading zero means octal. GCC uses this to output values larger
3866 than an int (because that would be hard in decimal). */
3873 /* Skip extra zeros. */
3877 if (sign
> 0 && radix
== 8 && twos_complement_bits
> 0)
3879 /* Octal, possibly signed. Check if we have enough chars for a
3885 while ((c
= *p1
) >= '0' && c
< '8')
3889 if (len
> twos_complement_bits
/ 3
3890 || (twos_complement_bits
% 3 == 0
3891 && len
== twos_complement_bits
/ 3))
3893 /* Ok, we have enough characters for a signed value, check
3894 for signedness by testing if the sign bit is set. */
3895 sign_bit
= (twos_complement_bits
% 3 + 2) % 3;
3897 if (c
& (1 << sign_bit
))
3899 /* Definitely signed. */
3900 twos_complement_representation
= 1;
3906 upper_limit
= LONG_MAX
/ radix
;
3908 while ((c
= *p
++) >= '0' && c
< ('0' + radix
))
3910 if (n
<= upper_limit
)
3912 if (twos_complement_representation
)
3914 /* Octal, signed, twos complement representation. In
3915 this case, n is the corresponding absolute value. */
3918 long sn
= c
- '0' - ((2 * (c
- '0')) | (2 << sign_bit
));
3930 /* unsigned representation */
3932 n
+= c
- '0'; /* FIXME this overflows anyway. */
3938 /* This depends on large values being output in octal, which is
3945 /* Ignore leading zeroes. */
3949 else if (c
== '2' || c
== '3')
3970 if (radix
== 8 && twos_complement_bits
> 0 && nbits
> twos_complement_bits
)
3972 /* We were supposed to parse a number with maximum
3973 TWOS_COMPLEMENT_BITS bits, but something went wrong. */
3984 /* Large decimal constants are an error (because it is hard to
3985 count how many bits are in them). */
3991 /* -0x7f is the same as 0x80. So deal with it by adding one to
3992 the number of bits. Two's complement represention octals
3993 can't have a '-' in front. */
3994 if (sign
== -1 && !twos_complement_representation
)
4005 /* It's *BITS which has the interesting information. */
4009 static struct type
*
4010 read_range_type (const char **pp
, int typenums
[2], int type_size
,
4011 struct objfile
*objfile
)
4013 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
4014 const char *orig_pp
= *pp
;
4019 struct type
*result_type
;
4020 struct type
*index_type
= NULL
;
4022 /* First comes a type we are a subrange of.
4023 In C it is usually 0, 1 or the type being defined. */
4024 if (read_type_number (pp
, rangenums
) != 0)
4025 return error_type (pp
, objfile
);
4026 self_subrange
= (rangenums
[0] == typenums
[0] &&
4027 rangenums
[1] == typenums
[1]);
4032 index_type
= read_type (pp
, objfile
);
4035 /* A semicolon should now follow; skip it. */
4039 /* The remaining two operands are usually lower and upper bounds
4040 of the range. But in some special cases they mean something else. */
4041 n2
= read_huge_number (pp
, ';', &n2bits
, type_size
);
4042 n3
= read_huge_number (pp
, ';', &n3bits
, type_size
);
4044 if (n2bits
== -1 || n3bits
== -1)
4045 return error_type (pp
, objfile
);
4048 goto handle_true_range
;
4050 /* If limits are huge, must be large integral type. */
4051 if (n2bits
!= 0 || n3bits
!= 0)
4053 char got_signed
= 0;
4054 char got_unsigned
= 0;
4055 /* Number of bits in the type. */
4058 /* If a type size attribute has been specified, the bounds of
4059 the range should fit in this size. If the lower bounds needs
4060 more bits than the upper bound, then the type is signed. */
4061 if (n2bits
<= type_size
&& n3bits
<= type_size
)
4063 if (n2bits
== type_size
&& n2bits
> n3bits
)
4069 /* Range from 0 to <large number> is an unsigned large integral type. */
4070 else if ((n2bits
== 0 && n2
== 0) && n3bits
!= 0)
4075 /* Range from <large number> to <large number>-1 is a large signed
4076 integral type. Take care of the case where <large number> doesn't
4077 fit in a long but <large number>-1 does. */
4078 else if ((n2bits
!= 0 && n3bits
!= 0 && n2bits
== n3bits
+ 1)
4079 || (n2bits
!= 0 && n3bits
== 0
4080 && (n2bits
== sizeof (long) * HOST_CHAR_BIT
)
4087 if (got_signed
|| got_unsigned
)
4088 return init_integer_type (objfile
, nbits
, got_unsigned
, NULL
);
4090 return error_type (pp
, objfile
);
4093 /* A type defined as a subrange of itself, with bounds both 0, is void. */
4094 if (self_subrange
&& n2
== 0 && n3
== 0)
4095 return init_type (objfile
, TYPE_CODE_VOID
, TARGET_CHAR_BIT
, NULL
);
4097 /* If n3 is zero and n2 is positive, we want a floating type, and n2
4098 is the width in bytes.
4100 Fortran programs appear to use this for complex types also. To
4101 distinguish between floats and complex, g77 (and others?) seem
4102 to use self-subranges for the complexes, and subranges of int for
4105 Also note that for complexes, g77 sets n2 to the size of one of
4106 the member floats, not the whole complex beast. My guess is that
4107 this was to work well with pre-COMPLEX versions of gdb. */
4109 if (n3
== 0 && n2
> 0)
4111 struct type
*float_type
4112 = dbx_init_float_type (objfile
, n2
* TARGET_CHAR_BIT
);
4115 return init_complex_type (objfile
, NULL
, float_type
);
4120 /* If the upper bound is -1, it must really be an unsigned integral. */
4122 else if (n2
== 0 && n3
== -1)
4124 int bits
= type_size
;
4128 /* We don't know its size. It is unsigned int or unsigned
4129 long. GCC 2.3.3 uses this for long long too, but that is
4130 just a GDB 3.5 compatibility hack. */
4131 bits
= gdbarch_int_bit (gdbarch
);
4134 return init_integer_type (objfile
, bits
, 1, NULL
);
4137 /* Special case: char is defined (Who knows why) as a subrange of
4138 itself with range 0-127. */
4139 else if (self_subrange
&& n2
== 0 && n3
== 127)
4141 struct type
*type
= init_integer_type (objfile
, TARGET_CHAR_BIT
,
4143 TYPE_NOSIGN (type
) = 1;
4146 /* We used to do this only for subrange of self or subrange of int. */
4149 /* -1 is used for the upper bound of (4 byte) "unsigned int" and
4150 "unsigned long", and we already checked for that,
4151 so don't need to test for it here. */
4154 /* n3 actually gives the size. */
4155 return init_integer_type (objfile
, -n3
* TARGET_CHAR_BIT
, 1, NULL
);
4157 /* Is n3 == 2**(8n)-1 for some integer n? Then it's an
4158 unsigned n-byte integer. But do require n to be a power of
4159 two; we don't want 3- and 5-byte integers flying around. */
4165 for (bytes
= 0; (bits
& 0xff) == 0xff; bytes
++)
4168 && ((bytes
- 1) & bytes
) == 0) /* "bytes is a power of two" */
4169 return init_integer_type (objfile
, bytes
* TARGET_CHAR_BIT
, 1, NULL
);
4172 /* I think this is for Convex "long long". Since I don't know whether
4173 Convex sets self_subrange, I also accept that particular size regardless
4174 of self_subrange. */
4175 else if (n3
== 0 && n2
< 0
4177 || n2
== -gdbarch_long_long_bit
4178 (gdbarch
) / TARGET_CHAR_BIT
))
4179 return init_integer_type (objfile
, -n2
* TARGET_CHAR_BIT
, 0, NULL
);
4180 else if (n2
== -n3
- 1)
4183 return init_integer_type (objfile
, 8, 0, NULL
);
4185 return init_integer_type (objfile
, 16, 0, NULL
);
4186 if (n3
== 0x7fffffff)
4187 return init_integer_type (objfile
, 32, 0, NULL
);
4190 /* We have a real range type on our hands. Allocate space and
4191 return a real pointer. */
4195 index_type
= objfile_type (objfile
)->builtin_int
;
4197 index_type
= *dbx_lookup_type (rangenums
, objfile
);
4198 if (index_type
== NULL
)
4200 /* Does this actually ever happen? Is that why we are worrying
4201 about dealing with it rather than just calling error_type? */
4203 complaint (_("base type %d of range type is not defined"), rangenums
[1]);
4205 index_type
= objfile_type (objfile
)->builtin_int
;
4209 = create_static_range_type (NULL
, index_type
, n2
, n3
);
4210 return (result_type
);
4213 /* Read in an argument list. This is a list of types, separated by commas
4214 and terminated with END. Return the list of types read in, or NULL
4215 if there is an error. */
4217 static struct field
*
4218 read_args (const char **pp
, int end
, struct objfile
*objfile
, int *nargsp
,
4221 /* FIXME! Remove this arbitrary limit! */
4222 struct type
*types
[1024]; /* Allow for fns of 1023 parameters. */
4229 /* Invalid argument list: no ','. */
4232 STABS_CONTINUE (pp
, objfile
);
4233 types
[n
++] = read_type (pp
, objfile
);
4235 (*pp
)++; /* get past `end' (the ':' character). */
4239 /* We should read at least the THIS parameter here. Some broken stabs
4240 output contained `(0,41),(0,42)=@s8;-16;,(0,43),(0,1);' where should
4241 have been present ";-16,(0,43)" reference instead. This way the
4242 excessive ";" marker prematurely stops the parameters parsing. */
4244 complaint (_("Invalid (empty) method arguments"));
4247 else if (TYPE_CODE (types
[n
- 1]) != TYPE_CODE_VOID
)
4255 rval
= XCNEWVEC (struct field
, n
);
4256 for (i
= 0; i
< n
; i
++)
4257 rval
[i
].type
= types
[i
];
4262 /* Common block handling. */
4264 /* List of symbols declared since the last BCOMM. This list is a tail
4265 of local_symbols. When ECOMM is seen, the symbols on the list
4266 are noted so their proper addresses can be filled in later,
4267 using the common block base address gotten from the assembler
4270 static struct pending
*common_block
;
4271 static int common_block_i
;
4273 /* Name of the current common block. We get it from the BCOMM instead of the
4274 ECOMM to match IBM documentation (even though IBM puts the name both places
4275 like everyone else). */
4276 static char *common_block_name
;
4278 /* Process a N_BCOMM symbol. The storage for NAME is not guaranteed
4279 to remain after this function returns. */
4282 common_block_start (const char *name
, struct objfile
*objfile
)
4284 if (common_block_name
!= NULL
)
4286 complaint (_("Invalid symbol data: common block within common block"));
4288 common_block
= *get_local_symbols ();
4289 common_block_i
= common_block
? common_block
->nsyms
: 0;
4290 common_block_name
= obstack_strdup (&objfile
->objfile_obstack
, name
);
4293 /* Process a N_ECOMM symbol. */
4296 common_block_end (struct objfile
*objfile
)
4298 /* Symbols declared since the BCOMM are to have the common block
4299 start address added in when we know it. common_block and
4300 common_block_i point to the first symbol after the BCOMM in
4301 the local_symbols list; copy the list and hang it off the
4302 symbol for the common block name for later fixup. */
4305 struct pending
*newobj
= 0;
4306 struct pending
*next
;
4309 if (common_block_name
== NULL
)
4311 complaint (_("ECOMM symbol unmatched by BCOMM"));
4315 sym
= allocate_symbol (objfile
);
4316 /* Note: common_block_name already saved on objfile_obstack. */
4317 SYMBOL_SET_LINKAGE_NAME (sym
, common_block_name
);
4318 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
4320 /* Now we copy all the symbols which have been defined since the BCOMM. */
4322 /* Copy all the struct pendings before common_block. */
4323 for (next
= *get_local_symbols ();
4324 next
!= NULL
&& next
!= common_block
;
4327 for (j
= 0; j
< next
->nsyms
; j
++)
4328 add_symbol_to_list (next
->symbol
[j
], &newobj
);
4331 /* Copy however much of COMMON_BLOCK we need. If COMMON_BLOCK is
4332 NULL, it means copy all the local symbols (which we already did
4335 if (common_block
!= NULL
)
4336 for (j
= common_block_i
; j
< common_block
->nsyms
; j
++)
4337 add_symbol_to_list (common_block
->symbol
[j
], &newobj
);
4339 SYMBOL_TYPE (sym
) = (struct type
*) newobj
;
4341 /* Should we be putting local_symbols back to what it was?
4344 i
= hashname (SYMBOL_LINKAGE_NAME (sym
));
4345 SYMBOL_VALUE_CHAIN (sym
) = global_sym_chain
[i
];
4346 global_sym_chain
[i
] = sym
;
4347 common_block_name
= NULL
;
4350 /* Add a common block's start address to the offset of each symbol
4351 declared to be in it (by being between a BCOMM/ECOMM pair that uses
4352 the common block name). */
4355 fix_common_block (struct symbol
*sym
, CORE_ADDR valu
)
4357 struct pending
*next
= (struct pending
*) SYMBOL_TYPE (sym
);
4359 for (; next
; next
= next
->next
)
4363 for (j
= next
->nsyms
- 1; j
>= 0; j
--)
4364 SET_SYMBOL_VALUE_ADDRESS (next
->symbol
[j
],
4365 SYMBOL_VALUE_ADDRESS (next
->symbol
[j
])
4372 /* Add {TYPE, TYPENUMS} to the NONAME_UNDEFS vector.
4373 See add_undefined_type for more details. */
4376 add_undefined_type_noname (struct type
*type
, int typenums
[2])
4380 nat
.typenums
[0] = typenums
[0];
4381 nat
.typenums
[1] = typenums
[1];
4384 if (noname_undefs_length
== noname_undefs_allocated
)
4386 noname_undefs_allocated
*= 2;
4387 noname_undefs
= (struct nat
*)
4388 xrealloc ((char *) noname_undefs
,
4389 noname_undefs_allocated
* sizeof (struct nat
));
4391 noname_undefs
[noname_undefs_length
++] = nat
;
4394 /* Add TYPE to the UNDEF_TYPES vector.
4395 See add_undefined_type for more details. */
4398 add_undefined_type_1 (struct type
*type
)
4400 if (undef_types_length
== undef_types_allocated
)
4402 undef_types_allocated
*= 2;
4403 undef_types
= (struct type
**)
4404 xrealloc ((char *) undef_types
,
4405 undef_types_allocated
* sizeof (struct type
*));
4407 undef_types
[undef_types_length
++] = type
;
4410 /* What about types defined as forward references inside of a small lexical
4412 /* Add a type to the list of undefined types to be checked through
4413 once this file has been read in.
4415 In practice, we actually maintain two such lists: The first list
4416 (UNDEF_TYPES) is used for types whose name has been provided, and
4417 concerns forward references (eg 'xs' or 'xu' forward references);
4418 the second list (NONAME_UNDEFS) is used for types whose name is
4419 unknown at creation time, because they were referenced through
4420 their type number before the actual type was declared.
4421 This function actually adds the given type to the proper list. */
4424 add_undefined_type (struct type
*type
, int typenums
[2])
4426 if (TYPE_NAME (type
) == NULL
)
4427 add_undefined_type_noname (type
, typenums
);
4429 add_undefined_type_1 (type
);
4432 /* Try to fix all undefined types pushed on the UNDEF_TYPES vector. */
4435 cleanup_undefined_types_noname (struct objfile
*objfile
)
4439 for (i
= 0; i
< noname_undefs_length
; i
++)
4441 struct nat nat
= noname_undefs
[i
];
4444 type
= dbx_lookup_type (nat
.typenums
, objfile
);
4445 if (nat
.type
!= *type
&& TYPE_CODE (*type
) != TYPE_CODE_UNDEF
)
4447 /* The instance flags of the undefined type are still unset,
4448 and needs to be copied over from the reference type.
4449 Since replace_type expects them to be identical, we need
4450 to set these flags manually before hand. */
4451 TYPE_INSTANCE_FLAGS (nat
.type
) = TYPE_INSTANCE_FLAGS (*type
);
4452 replace_type (nat
.type
, *type
);
4456 noname_undefs_length
= 0;
4459 /* Go through each undefined type, see if it's still undefined, and fix it
4460 up if possible. We have two kinds of undefined types:
4462 TYPE_CODE_ARRAY: Array whose target type wasn't defined yet.
4463 Fix: update array length using the element bounds
4464 and the target type's length.
4465 TYPE_CODE_STRUCT, TYPE_CODE_UNION: Structure whose fields were not
4466 yet defined at the time a pointer to it was made.
4467 Fix: Do a full lookup on the struct/union tag. */
4470 cleanup_undefined_types_1 (void)
4474 /* Iterate over every undefined type, and look for a symbol whose type
4475 matches our undefined type. The symbol matches if:
4476 1. It is a typedef in the STRUCT domain;
4477 2. It has the same name, and same type code;
4478 3. The instance flags are identical.
4480 It is important to check the instance flags, because we have seen
4481 examples where the debug info contained definitions such as:
4483 "foo_t:t30=B31=xefoo_t:"
4485 In this case, we have created an undefined type named "foo_t" whose
4486 instance flags is null (when processing "xefoo_t"), and then created
4487 another type with the same name, but with different instance flags
4488 ('B' means volatile). I think that the definition above is wrong,
4489 since the same type cannot be volatile and non-volatile at the same
4490 time, but we need to be able to cope with it when it happens. The
4491 approach taken here is to treat these two types as different. */
4493 for (type
= undef_types
; type
< undef_types
+ undef_types_length
; type
++)
4495 switch (TYPE_CODE (*type
))
4498 case TYPE_CODE_STRUCT
:
4499 case TYPE_CODE_UNION
:
4500 case TYPE_CODE_ENUM
:
4502 /* Check if it has been defined since. Need to do this here
4503 as well as in check_typedef to deal with the (legitimate in
4504 C though not C++) case of several types with the same name
4505 in different source files. */
4506 if (TYPE_STUB (*type
))
4508 struct pending
*ppt
;
4510 /* Name of the type, without "struct" or "union". */
4511 const char *type_name
= TYPE_NAME (*type
);
4513 if (type_name
== NULL
)
4515 complaint (_("need a type name"));
4518 for (ppt
= *get_file_symbols (); ppt
; ppt
= ppt
->next
)
4520 for (i
= 0; i
< ppt
->nsyms
; i
++)
4522 struct symbol
*sym
= ppt
->symbol
[i
];
4524 if (SYMBOL_CLASS (sym
) == LOC_TYPEDEF
4525 && SYMBOL_DOMAIN (sym
) == STRUCT_DOMAIN
4526 && (TYPE_CODE (SYMBOL_TYPE (sym
)) ==
4528 && (TYPE_INSTANCE_FLAGS (*type
) ==
4529 TYPE_INSTANCE_FLAGS (SYMBOL_TYPE (sym
)))
4530 && strcmp (SYMBOL_LINKAGE_NAME (sym
),
4532 replace_type (*type
, SYMBOL_TYPE (sym
));
4541 complaint (_("forward-referenced types left unresolved, "
4549 undef_types_length
= 0;
4552 /* Try to fix all the undefined types we encountered while processing
4556 cleanup_undefined_stabs_types (struct objfile
*objfile
)
4558 cleanup_undefined_types_1 ();
4559 cleanup_undefined_types_noname (objfile
);
4562 /* See stabsread.h. */
4565 scan_file_globals (struct objfile
*objfile
)
4568 struct symbol
*sym
, *prev
;
4569 struct objfile
*resolve_objfile
;
4571 /* SVR4 based linkers copy referenced global symbols from shared
4572 libraries to the main executable.
4573 If we are scanning the symbols for a shared library, try to resolve
4574 them from the minimal symbols of the main executable first. */
4576 if (symfile_objfile
&& objfile
!= symfile_objfile
)
4577 resolve_objfile
= symfile_objfile
;
4579 resolve_objfile
= objfile
;
4583 /* Avoid expensive loop through all minimal symbols if there are
4584 no unresolved symbols. */
4585 for (hash
= 0; hash
< HASHSIZE
; hash
++)
4587 if (global_sym_chain
[hash
])
4590 if (hash
>= HASHSIZE
)
4593 for (minimal_symbol
*msymbol
: resolve_objfile
->msymbols ())
4597 /* Skip static symbols. */
4598 switch (MSYMBOL_TYPE (msymbol
))
4610 /* Get the hash index and check all the symbols
4611 under that hash index. */
4613 hash
= hashname (MSYMBOL_LINKAGE_NAME (msymbol
));
4615 for (sym
= global_sym_chain
[hash
]; sym
;)
4617 if (strcmp (MSYMBOL_LINKAGE_NAME (msymbol
),
4618 SYMBOL_LINKAGE_NAME (sym
)) == 0)
4620 /* Splice this symbol out of the hash chain and
4621 assign the value we have to it. */
4624 SYMBOL_VALUE_CHAIN (prev
) = SYMBOL_VALUE_CHAIN (sym
);
4628 global_sym_chain
[hash
] = SYMBOL_VALUE_CHAIN (sym
);
4631 /* Check to see whether we need to fix up a common block. */
4632 /* Note: this code might be executed several times for
4633 the same symbol if there are multiple references. */
4636 if (SYMBOL_CLASS (sym
) == LOC_BLOCK
)
4638 fix_common_block (sym
,
4639 MSYMBOL_VALUE_ADDRESS (resolve_objfile
,
4644 SET_SYMBOL_VALUE_ADDRESS
4645 (sym
, MSYMBOL_VALUE_ADDRESS (resolve_objfile
,
4648 SYMBOL_SECTION (sym
) = MSYMBOL_SECTION (msymbol
);
4653 sym
= SYMBOL_VALUE_CHAIN (prev
);
4657 sym
= global_sym_chain
[hash
];
4663 sym
= SYMBOL_VALUE_CHAIN (sym
);
4667 if (resolve_objfile
== objfile
)
4669 resolve_objfile
= objfile
;
4672 /* Change the storage class of any remaining unresolved globals to
4673 LOC_UNRESOLVED and remove them from the chain. */
4674 for (hash
= 0; hash
< HASHSIZE
; hash
++)
4676 sym
= global_sym_chain
[hash
];
4680 sym
= SYMBOL_VALUE_CHAIN (sym
);
4682 /* Change the symbol address from the misleading chain value
4684 SET_SYMBOL_VALUE_ADDRESS (prev
, 0);
4686 /* Complain about unresolved common block symbols. */
4687 if (SYMBOL_CLASS (prev
) == LOC_STATIC
)
4688 SYMBOL_ACLASS_INDEX (prev
) = LOC_UNRESOLVED
;
4690 complaint (_("%s: common block `%s' from "
4691 "global_sym_chain unresolved"),
4692 objfile_name (objfile
), SYMBOL_PRINT_NAME (prev
));
4695 memset (global_sym_chain
, 0, sizeof (global_sym_chain
));
4698 /* Initialize anything that needs initializing when starting to read
4699 a fresh piece of a symbol file, e.g. reading in the stuff corresponding
4703 stabsread_init (void)
4707 /* Initialize anything that needs initializing when a completely new
4708 symbol file is specified (not just adding some symbols from another
4709 file, e.g. a shared library). */
4712 stabsread_new_init (void)
4714 /* Empty the hash table of global syms looking for values. */
4715 memset (global_sym_chain
, 0, sizeof (global_sym_chain
));
4718 /* Initialize anything that needs initializing at the same time as
4719 start_symtab() is called. */
4724 global_stabs
= NULL
; /* AIX COFF */
4725 /* Leave FILENUM of 0 free for builtin types and this file's types. */
4726 n_this_object_header_files
= 1;
4727 type_vector_length
= 0;
4728 type_vector
= (struct type
**) 0;
4729 within_function
= 0;
4731 /* FIXME: If common_block_name is not already NULL, we should complain(). */
4732 common_block_name
= NULL
;
4735 /* Call after end_symtab(). */
4742 xfree (type_vector
);
4745 type_vector_length
= 0;
4746 previous_stab_code
= 0;
4750 finish_global_stabs (struct objfile
*objfile
)
4754 patch_block_stabs (*get_global_symbols (), global_stabs
, objfile
);
4755 xfree (global_stabs
);
4756 global_stabs
= NULL
;
4760 /* Find the end of the name, delimited by a ':', but don't match
4761 ObjC symbols which look like -[Foo bar::]:bla. */
4763 find_name_end (const char *name
)
4765 const char *s
= name
;
4767 if (s
[0] == '-' || *s
== '+')
4769 /* Must be an ObjC method symbol. */
4772 error (_("invalid symbol name \"%s\""), name
);
4774 s
= strchr (s
, ']');
4777 error (_("invalid symbol name \"%s\""), name
);
4779 return strchr (s
, ':');
4783 return strchr (s
, ':');
4787 /* See stabsread.h. */
4790 hashname (const char *name
)
4792 return hash (name
, strlen (name
)) % HASHSIZE
;
4795 /* Initializer for this module. */
4798 _initialize_stabsread (void)
4800 undef_types_allocated
= 20;
4801 undef_types_length
= 0;
4802 undef_types
= XNEWVEC (struct type
*, undef_types_allocated
);
4804 noname_undefs_allocated
= 20;
4805 noname_undefs_length
= 0;
4806 noname_undefs
= XNEWVEC (struct nat
, noname_undefs_allocated
);
4808 stab_register_index
= register_symbol_register_impl (LOC_REGISTER
,
4809 &stab_register_funcs
);
4810 stab_regparm_index
= register_symbol_register_impl (LOC_REGPARM_ADDR
,
4811 &stab_register_funcs
);