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
),
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 (sym
->linkage_name () && sym
->linkage_name ()[0] != '#')
1044 i
= hashname (sym
->linkage_name ());
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 stabs_argument_has_addr, because the compiler puts out
1146 the 'p' symbol even if it never saves the argument onto
1149 On most machines, we want to preserve both symbols, so
1150 that we can still get information about what is going on
1151 with the stack (VAX for computing args_printed, using
1152 stack slots instead of saved registers in backtraces,
1155 Note that this code illegally combines
1156 main(argc) struct foo argc; { register struct foo argc; }
1157 but this case is considered pathological and causes a warning
1158 from a decent compiler. */
1160 struct pending
*local_symbols
= *get_local_symbols ();
1162 && local_symbols
->nsyms
> 0
1163 && gdbarch_stabs_argument_has_addr (gdbarch
, SYMBOL_TYPE (sym
)))
1165 struct symbol
*prev_sym
;
1167 prev_sym
= local_symbols
->symbol
[local_symbols
->nsyms
- 1];
1168 if ((SYMBOL_CLASS (prev_sym
) == LOC_REF_ARG
1169 || SYMBOL_CLASS (prev_sym
) == LOC_ARG
)
1170 && strcmp (prev_sym
->linkage_name (),
1171 sym
->linkage_name ()) == 0)
1173 SYMBOL_ACLASS_INDEX (prev_sym
) = stab_register_index
;
1174 /* Use the type from the LOC_REGISTER; that is the type
1175 that is actually in that register. */
1176 SYMBOL_TYPE (prev_sym
) = SYMBOL_TYPE (sym
);
1177 SYMBOL_VALUE (prev_sym
) = SYMBOL_VALUE (sym
);
1182 add_symbol_to_list (sym
, get_local_symbols ());
1185 add_symbol_to_list (sym
, get_file_symbols ());
1189 /* Static symbol at top level of file. */
1190 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
1191 SYMBOL_ACLASS_INDEX (sym
) = LOC_STATIC
;
1192 SET_SYMBOL_VALUE_ADDRESS (sym
, valu
);
1193 if (gdbarch_static_transform_name_p (gdbarch
)
1194 && gdbarch_static_transform_name (gdbarch
, sym
->linkage_name ())
1195 != sym
->linkage_name ())
1197 struct bound_minimal_symbol msym
;
1199 msym
= lookup_minimal_symbol (sym
->linkage_name (), NULL
, objfile
);
1200 if (msym
.minsym
!= NULL
)
1202 const char *new_name
= gdbarch_static_transform_name
1203 (gdbarch
, sym
->linkage_name ());
1205 SYMBOL_SET_LINKAGE_NAME (sym
, new_name
);
1206 SET_SYMBOL_VALUE_ADDRESS (sym
,
1207 BMSYMBOL_VALUE_ADDRESS (msym
));
1210 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1211 add_symbol_to_list (sym
, get_file_symbols ());
1215 /* In Ada, there is no distinction between typedef and non-typedef;
1216 any type declaration implicitly has the equivalent of a typedef,
1217 and thus 't' is in fact equivalent to 'Tt'.
1219 Therefore, for Ada units, we check the character immediately
1220 before the 't', and if we do not find a 'T', then make sure to
1221 create the associated symbol in the STRUCT_DOMAIN ('t' definitions
1222 will be stored in the VAR_DOMAIN). If the symbol was indeed
1223 defined as 'Tt' then the STRUCT_DOMAIN symbol will be created
1224 elsewhere, so we don't need to take care of that.
1226 This is important to do, because of forward references:
1227 The cleanup of undefined types stored in undef_types only uses
1228 STRUCT_DOMAIN symbols to perform the replacement. */
1229 synonym
= (SYMBOL_LANGUAGE (sym
) == language_ada
&& p
[-2] != 'T');
1232 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
1234 /* For a nameless type, we don't want a create a symbol, thus we
1235 did not use `sym'. Return without further processing. */
1239 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
1240 SYMBOL_VALUE (sym
) = valu
;
1241 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1242 /* C++ vagaries: we may have a type which is derived from
1243 a base type which did not have its name defined when the
1244 derived class was output. We fill in the derived class's
1245 base part member's name here in that case. */
1246 if (TYPE_NAME (SYMBOL_TYPE (sym
)) != NULL
)
1247 if ((TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_STRUCT
1248 || TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_UNION
)
1249 && TYPE_N_BASECLASSES (SYMBOL_TYPE (sym
)))
1253 for (j
= TYPE_N_BASECLASSES (SYMBOL_TYPE (sym
)) - 1; j
>= 0; j
--)
1254 if (TYPE_BASECLASS_NAME (SYMBOL_TYPE (sym
), j
) == 0)
1255 TYPE_BASECLASS_NAME (SYMBOL_TYPE (sym
), j
) =
1256 TYPE_NAME (TYPE_BASECLASS (SYMBOL_TYPE (sym
), j
));
1259 if (TYPE_NAME (SYMBOL_TYPE (sym
)) == NULL
)
1261 if ((TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_PTR
1262 && strcmp (sym
->linkage_name (), vtbl_ptr_name
))
1263 || TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_FUNC
)
1265 /* If we are giving a name to a type such as "pointer to
1266 foo" or "function returning foo", we better not set
1267 the TYPE_NAME. If the program contains "typedef char
1268 *caddr_t;", we don't want all variables of type char
1269 * to print as caddr_t. This is not just a
1270 consequence of GDB's type management; PCC and GCC (at
1271 least through version 2.4) both output variables of
1272 either type char * or caddr_t with the type number
1273 defined in the 't' symbol for caddr_t. If a future
1274 compiler cleans this up it GDB is not ready for it
1275 yet, but if it becomes ready we somehow need to
1276 disable this check (without breaking the PCC/GCC2.4
1281 Fortunately, this check seems not to be necessary
1282 for anything except pointers or functions. */
1283 /* ezannoni: 2000-10-26. This seems to apply for
1284 versions of gcc older than 2.8. This was the original
1285 problem: with the following code gdb would tell that
1286 the type for name1 is caddr_t, and func is char().
1288 typedef char *caddr_t;
1300 /* Pascal accepts names for pointer types. */
1301 if (get_current_subfile ()->language
== language_pascal
)
1303 TYPE_NAME (SYMBOL_TYPE (sym
)) = sym
->linkage_name ();
1307 TYPE_NAME (SYMBOL_TYPE (sym
)) = sym
->linkage_name ();
1310 add_symbol_to_list (sym
, get_file_symbols ());
1314 /* Create the STRUCT_DOMAIN clone. */
1315 struct symbol
*struct_sym
= allocate_symbol (objfile
);
1318 SYMBOL_ACLASS_INDEX (struct_sym
) = LOC_TYPEDEF
;
1319 SYMBOL_VALUE (struct_sym
) = valu
;
1320 SYMBOL_DOMAIN (struct_sym
) = STRUCT_DOMAIN
;
1321 if (TYPE_NAME (SYMBOL_TYPE (sym
)) == 0)
1322 TYPE_NAME (SYMBOL_TYPE (sym
))
1323 = obconcat (&objfile
->objfile_obstack
, sym
->linkage_name (),
1325 add_symbol_to_list (struct_sym
, get_file_symbols ());
1331 /* Struct, union, or enum tag. For GNU C++, this can be be followed
1332 by 't' which means we are typedef'ing it as well. */
1333 synonym
= *p
== 't';
1338 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
1340 /* For a nameless type, we don't want a create a symbol, thus we
1341 did not use `sym'. Return without further processing. */
1345 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
1346 SYMBOL_VALUE (sym
) = valu
;
1347 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
1348 if (TYPE_NAME (SYMBOL_TYPE (sym
)) == 0)
1349 TYPE_NAME (SYMBOL_TYPE (sym
))
1350 = obconcat (&objfile
->objfile_obstack
, sym
->linkage_name (),
1352 add_symbol_to_list (sym
, get_file_symbols ());
1356 /* Clone the sym and then modify it. */
1357 struct symbol
*typedef_sym
= allocate_symbol (objfile
);
1359 *typedef_sym
= *sym
;
1360 SYMBOL_ACLASS_INDEX (typedef_sym
) = LOC_TYPEDEF
;
1361 SYMBOL_VALUE (typedef_sym
) = valu
;
1362 SYMBOL_DOMAIN (typedef_sym
) = VAR_DOMAIN
;
1363 if (TYPE_NAME (SYMBOL_TYPE (sym
)) == 0)
1364 TYPE_NAME (SYMBOL_TYPE (sym
))
1365 = obconcat (&objfile
->objfile_obstack
, sym
->linkage_name (),
1367 add_symbol_to_list (typedef_sym
, get_file_symbols ());
1372 /* Static symbol of local scope. */
1373 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
1374 SYMBOL_ACLASS_INDEX (sym
) = LOC_STATIC
;
1375 SET_SYMBOL_VALUE_ADDRESS (sym
, valu
);
1376 if (gdbarch_static_transform_name_p (gdbarch
)
1377 && gdbarch_static_transform_name (gdbarch
, sym
->linkage_name ())
1378 != sym
->linkage_name ())
1380 struct bound_minimal_symbol msym
;
1382 msym
= lookup_minimal_symbol (sym
->linkage_name (), NULL
, objfile
);
1383 if (msym
.minsym
!= NULL
)
1385 const char *new_name
= gdbarch_static_transform_name
1386 (gdbarch
, sym
->linkage_name ());
1388 SYMBOL_SET_LINKAGE_NAME (sym
, new_name
);
1389 SET_SYMBOL_VALUE_ADDRESS (sym
, BMSYMBOL_VALUE_ADDRESS (msym
));
1392 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1393 add_symbol_to_list (sym
, get_local_symbols ());
1397 /* Reference parameter */
1398 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
1399 SYMBOL_ACLASS_INDEX (sym
) = LOC_REF_ARG
;
1400 SYMBOL_IS_ARGUMENT (sym
) = 1;
1401 SYMBOL_VALUE (sym
) = valu
;
1402 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1403 add_symbol_to_list (sym
, get_local_symbols ());
1407 /* Reference parameter which is in a register. */
1408 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
1409 SYMBOL_ACLASS_INDEX (sym
) = stab_regparm_index
;
1410 SYMBOL_IS_ARGUMENT (sym
) = 1;
1411 SYMBOL_VALUE (sym
) = valu
;
1412 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1413 add_symbol_to_list (sym
, get_local_symbols ());
1417 /* This is used by Sun FORTRAN for "function result value".
1418 Sun claims ("dbx and dbxtool interfaces", 2nd ed)
1419 that Pascal uses it too, but when I tried it Pascal used
1420 "x:3" (local symbol) instead. */
1421 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
1422 SYMBOL_ACLASS_INDEX (sym
) = LOC_LOCAL
;
1423 SYMBOL_VALUE (sym
) = valu
;
1424 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1425 add_symbol_to_list (sym
, get_local_symbols ());
1429 SYMBOL_TYPE (sym
) = error_type (&p
, objfile
);
1430 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST
;
1431 SYMBOL_VALUE (sym
) = 0;
1432 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1433 add_symbol_to_list (sym
, get_file_symbols ());
1437 /* Some systems pass variables of certain types by reference instead
1438 of by value, i.e. they will pass the address of a structure (in a
1439 register or on the stack) instead of the structure itself. */
1441 if (gdbarch_stabs_argument_has_addr (gdbarch
, SYMBOL_TYPE (sym
))
1442 && SYMBOL_IS_ARGUMENT (sym
))
1444 /* We have to convert LOC_REGISTER to LOC_REGPARM_ADDR (for
1445 variables passed in a register). */
1446 if (SYMBOL_CLASS (sym
) == LOC_REGISTER
)
1447 SYMBOL_ACLASS_INDEX (sym
) = LOC_REGPARM_ADDR
;
1448 /* Likewise for converting LOC_ARG to LOC_REF_ARG (for the 7th
1449 and subsequent arguments on SPARC, for example). */
1450 else if (SYMBOL_CLASS (sym
) == LOC_ARG
)
1451 SYMBOL_ACLASS_INDEX (sym
) = LOC_REF_ARG
;
1457 /* Skip rest of this symbol and return an error type.
1459 General notes on error recovery: error_type always skips to the
1460 end of the symbol (modulo cretinous dbx symbol name continuation).
1461 Thus code like this:
1463 if (*(*pp)++ != ';')
1464 return error_type (pp, objfile);
1466 is wrong because if *pp starts out pointing at '\0' (typically as the
1467 result of an earlier error), it will be incremented to point to the
1468 start of the next symbol, which might produce strange results, at least
1469 if you run off the end of the string table. Instead use
1472 return error_type (pp, objfile);
1478 foo = error_type (pp, objfile);
1482 And in case it isn't obvious, the point of all this hair is so the compiler
1483 can define new types and new syntaxes, and old versions of the
1484 debugger will be able to read the new symbol tables. */
1486 static struct type
*
1487 error_type (const char **pp
, struct objfile
*objfile
)
1489 complaint (_("couldn't parse type; debugger out of date?"));
1492 /* Skip to end of symbol. */
1493 while (**pp
!= '\0')
1498 /* Check for and handle cretinous dbx symbol name continuation! */
1499 if ((*pp
)[-1] == '\\' || (*pp
)[-1] == '?')
1501 *pp
= next_symbol_text (objfile
);
1508 return objfile_type (objfile
)->builtin_error
;
1512 /* Read type information or a type definition; return the type. Even
1513 though this routine accepts either type information or a type
1514 definition, the distinction is relevant--some parts of stabsread.c
1515 assume that type information starts with a digit, '-', or '(' in
1516 deciding whether to call read_type. */
1518 static struct type
*
1519 read_type (const char **pp
, struct objfile
*objfile
)
1521 struct type
*type
= 0;
1524 char type_descriptor
;
1526 /* Size in bits of type if specified by a type attribute, or -1 if
1527 there is no size attribute. */
1530 /* Used to distinguish string and bitstring from char-array and set. */
1533 /* Used to distinguish vector from array. */
1536 /* Read type number if present. The type number may be omitted.
1537 for instance in a two-dimensional array declared with type
1538 "ar1;1;10;ar1;1;10;4". */
1539 if ((**pp
>= '0' && **pp
<= '9')
1543 if (read_type_number (pp
, typenums
) != 0)
1544 return error_type (pp
, objfile
);
1548 /* Type is not being defined here. Either it already
1549 exists, or this is a forward reference to it.
1550 dbx_alloc_type handles both cases. */
1551 type
= dbx_alloc_type (typenums
, objfile
);
1553 /* If this is a forward reference, arrange to complain if it
1554 doesn't get patched up by the time we're done
1556 if (TYPE_CODE (type
) == TYPE_CODE_UNDEF
)
1557 add_undefined_type (type
, typenums
);
1562 /* Type is being defined here. */
1564 Also skip the type descriptor - we get it below with (*pp)[-1]. */
1569 /* 'typenums=' not present, type is anonymous. Read and return
1570 the definition, but don't put it in the type vector. */
1571 typenums
[0] = typenums
[1] = -1;
1576 type_descriptor
= (*pp
)[-1];
1577 switch (type_descriptor
)
1581 enum type_code code
;
1583 /* Used to index through file_symbols. */
1584 struct pending
*ppt
;
1587 /* Name including "struct", etc. */
1591 const char *from
, *p
, *q1
, *q2
;
1593 /* Set the type code according to the following letter. */
1597 code
= TYPE_CODE_STRUCT
;
1600 code
= TYPE_CODE_UNION
;
1603 code
= TYPE_CODE_ENUM
;
1607 /* Complain and keep going, so compilers can invent new
1608 cross-reference types. */
1609 complaint (_("Unrecognized cross-reference type `%c'"),
1611 code
= TYPE_CODE_STRUCT
;
1616 q1
= strchr (*pp
, '<');
1617 p
= strchr (*pp
, ':');
1619 return error_type (pp
, objfile
);
1620 if (q1
&& p
> q1
&& p
[1] == ':')
1622 int nesting_level
= 0;
1624 for (q2
= q1
; *q2
; q2
++)
1628 else if (*q2
== '>')
1630 else if (*q2
== ':' && nesting_level
== 0)
1635 return error_type (pp
, objfile
);
1638 if (get_current_subfile ()->language
== language_cplus
)
1640 char *name
= (char *) alloca (p
- *pp
+ 1);
1642 memcpy (name
, *pp
, p
- *pp
);
1643 name
[p
- *pp
] = '\0';
1645 std::string new_name
= cp_canonicalize_string (name
);
1646 if (!new_name
.empty ())
1647 type_name
= obstack_strdup (&objfile
->objfile_obstack
,
1650 if (type_name
== NULL
)
1652 char *to
= type_name
= (char *)
1653 obstack_alloc (&objfile
->objfile_obstack
, p
- *pp
+ 1);
1655 /* Copy the name. */
1662 /* Set the pointer ahead of the name which we just read, and
1667 /* If this type has already been declared, then reuse the same
1668 type, rather than allocating a new one. This saves some
1671 for (ppt
= *get_file_symbols (); ppt
; ppt
= ppt
->next
)
1672 for (i
= 0; i
< ppt
->nsyms
; i
++)
1674 struct symbol
*sym
= ppt
->symbol
[i
];
1676 if (SYMBOL_CLASS (sym
) == LOC_TYPEDEF
1677 && SYMBOL_DOMAIN (sym
) == STRUCT_DOMAIN
1678 && (TYPE_CODE (SYMBOL_TYPE (sym
)) == code
)
1679 && strcmp (sym
->linkage_name (), type_name
) == 0)
1681 obstack_free (&objfile
->objfile_obstack
, type_name
);
1682 type
= SYMBOL_TYPE (sym
);
1683 if (typenums
[0] != -1)
1684 *dbx_lookup_type (typenums
, objfile
) = type
;
1689 /* Didn't find the type to which this refers, so we must
1690 be dealing with a forward reference. Allocate a type
1691 structure for it, and keep track of it so we can
1692 fill in the rest of the fields when we get the full
1694 type
= dbx_alloc_type (typenums
, objfile
);
1695 TYPE_CODE (type
) = code
;
1696 TYPE_NAME (type
) = type_name
;
1697 INIT_CPLUS_SPECIFIC (type
);
1698 TYPE_STUB (type
) = 1;
1700 add_undefined_type (type
, typenums
);
1704 case '-': /* RS/6000 built-in type */
1718 /* We deal with something like t(1,2)=(3,4)=... which
1719 the Lucid compiler and recent gcc versions (post 2.7.3) use. */
1721 /* Allocate and enter the typedef type first.
1722 This handles recursive types. */
1723 type
= dbx_alloc_type (typenums
, objfile
);
1724 TYPE_CODE (type
) = TYPE_CODE_TYPEDEF
;
1726 struct type
*xtype
= read_type (pp
, objfile
);
1730 /* It's being defined as itself. That means it is "void". */
1731 TYPE_CODE (type
) = TYPE_CODE_VOID
;
1732 TYPE_LENGTH (type
) = 1;
1734 else if (type_size
>= 0 || is_string
)
1736 /* This is the absolute wrong way to construct types. Every
1737 other debug format has found a way around this problem and
1738 the related problems with unnecessarily stubbed types;
1739 someone motivated should attempt to clean up the issue
1740 here as well. Once a type pointed to has been created it
1741 should not be modified.
1743 Well, it's not *absolutely* wrong. Constructing recursive
1744 types (trees, linked lists) necessarily entails modifying
1745 types after creating them. Constructing any loop structure
1746 entails side effects. The Dwarf 2 reader does handle this
1747 more gracefully (it never constructs more than once
1748 instance of a type object, so it doesn't have to copy type
1749 objects wholesale), but it still mutates type objects after
1750 other folks have references to them.
1752 Keep in mind that this circularity/mutation issue shows up
1753 at the source language level, too: C's "incomplete types",
1754 for example. So the proper cleanup, I think, would be to
1755 limit GDB's type smashing to match exactly those required
1756 by the source language. So GDB could have a
1757 "complete_this_type" function, but never create unnecessary
1758 copies of a type otherwise. */
1759 replace_type (type
, xtype
);
1760 TYPE_NAME (type
) = NULL
;
1764 TYPE_TARGET_STUB (type
) = 1;
1765 TYPE_TARGET_TYPE (type
) = xtype
;
1770 /* In the following types, we must be sure to overwrite any existing
1771 type that the typenums refer to, rather than allocating a new one
1772 and making the typenums point to the new one. This is because there
1773 may already be pointers to the existing type (if it had been
1774 forward-referenced), and we must change it to a pointer, function,
1775 reference, or whatever, *in-place*. */
1777 case '*': /* Pointer to another type */
1778 type1
= read_type (pp
, objfile
);
1779 type
= make_pointer_type (type1
, dbx_lookup_type (typenums
, objfile
));
1782 case '&': /* Reference to another type */
1783 type1
= read_type (pp
, objfile
);
1784 type
= make_reference_type (type1
, dbx_lookup_type (typenums
, objfile
),
1788 case 'f': /* Function returning another type */
1789 type1
= read_type (pp
, objfile
);
1790 type
= make_function_type (type1
, dbx_lookup_type (typenums
, objfile
));
1793 case 'g': /* Prototyped function. (Sun) */
1795 /* Unresolved questions:
1797 - According to Sun's ``STABS Interface Manual'', for 'f'
1798 and 'F' symbol descriptors, a `0' in the argument type list
1799 indicates a varargs function. But it doesn't say how 'g'
1800 type descriptors represent that info. Someone with access
1801 to Sun's toolchain should try it out.
1803 - According to the comment in define_symbol (search for
1804 `process_prototype_types:'), Sun emits integer arguments as
1805 types which ref themselves --- like `void' types. Do we
1806 have to deal with that here, too? Again, someone with
1807 access to Sun's toolchain should try it out and let us
1810 const char *type_start
= (*pp
) - 1;
1811 struct type
*return_type
= read_type (pp
, objfile
);
1812 struct type
*func_type
1813 = make_function_type (return_type
,
1814 dbx_lookup_type (typenums
, objfile
));
1817 struct type_list
*next
;
1821 while (**pp
&& **pp
!= '#')
1823 struct type
*arg_type
= read_type (pp
, objfile
);
1824 struct type_list
*newobj
= XALLOCA (struct type_list
);
1825 newobj
->type
= arg_type
;
1826 newobj
->next
= arg_types
;
1834 complaint (_("Prototyped function type didn't "
1835 "end arguments with `#':\n%s"),
1839 /* If there is just one argument whose type is `void', then
1840 that's just an empty argument list. */
1842 && ! arg_types
->next
1843 && TYPE_CODE (arg_types
->type
) == TYPE_CODE_VOID
)
1846 TYPE_FIELDS (func_type
)
1847 = (struct field
*) TYPE_ALLOC (func_type
,
1848 num_args
* sizeof (struct field
));
1849 memset (TYPE_FIELDS (func_type
), 0, num_args
* sizeof (struct field
));
1852 struct type_list
*t
;
1854 /* We stuck each argument type onto the front of the list
1855 when we read it, so the list is reversed. Build the
1856 fields array right-to-left. */
1857 for (t
= arg_types
, i
= num_args
- 1; t
; t
= t
->next
, i
--)
1858 TYPE_FIELD_TYPE (func_type
, i
) = t
->type
;
1860 TYPE_NFIELDS (func_type
) = num_args
;
1861 TYPE_PROTOTYPED (func_type
) = 1;
1867 case 'k': /* Const qualifier on some type (Sun) */
1868 type
= read_type (pp
, objfile
);
1869 type
= make_cv_type (1, TYPE_VOLATILE (type
), type
,
1870 dbx_lookup_type (typenums
, objfile
));
1873 case 'B': /* Volatile qual on some type (Sun) */
1874 type
= read_type (pp
, objfile
);
1875 type
= make_cv_type (TYPE_CONST (type
), 1, type
,
1876 dbx_lookup_type (typenums
, objfile
));
1880 if (isdigit (**pp
) || **pp
== '(' || **pp
== '-')
1881 { /* Member (class & variable) type */
1882 /* FIXME -- we should be doing smash_to_XXX types here. */
1884 struct type
*domain
= read_type (pp
, objfile
);
1885 struct type
*memtype
;
1888 /* Invalid member type data format. */
1889 return error_type (pp
, objfile
);
1892 memtype
= read_type (pp
, objfile
);
1893 type
= dbx_alloc_type (typenums
, objfile
);
1894 smash_to_memberptr_type (type
, domain
, memtype
);
1897 /* type attribute */
1899 const char *attr
= *pp
;
1901 /* Skip to the semicolon. */
1902 while (**pp
!= ';' && **pp
!= '\0')
1905 return error_type (pp
, objfile
);
1907 ++ * pp
; /* Skip the semicolon. */
1911 case 's': /* Size attribute */
1912 type_size
= atoi (attr
+ 1);
1917 case 'S': /* String attribute */
1918 /* FIXME: check to see if following type is array? */
1922 case 'V': /* Vector attribute */
1923 /* FIXME: check to see if following type is array? */
1928 /* Ignore unrecognized type attributes, so future compilers
1929 can invent new ones. */
1937 case '#': /* Method (class & fn) type */
1938 if ((*pp
)[0] == '#')
1940 /* We'll get the parameter types from the name. */
1941 struct type
*return_type
;
1944 return_type
= read_type (pp
, objfile
);
1945 if (*(*pp
)++ != ';')
1946 complaint (_("invalid (minimal) member type "
1947 "data format at symtab pos %d."),
1949 type
= allocate_stub_method (return_type
);
1950 if (typenums
[0] != -1)
1951 *dbx_lookup_type (typenums
, objfile
) = type
;
1955 struct type
*domain
= read_type (pp
, objfile
);
1956 struct type
*return_type
;
1961 /* Invalid member type data format. */
1962 return error_type (pp
, objfile
);
1966 return_type
= read_type (pp
, objfile
);
1967 args
= read_args (pp
, ';', objfile
, &nargs
, &varargs
);
1969 return error_type (pp
, objfile
);
1970 type
= dbx_alloc_type (typenums
, objfile
);
1971 smash_to_method_type (type
, domain
, return_type
, args
,
1976 case 'r': /* Range type */
1977 type
= read_range_type (pp
, typenums
, type_size
, objfile
);
1978 if (typenums
[0] != -1)
1979 *dbx_lookup_type (typenums
, objfile
) = type
;
1984 /* Sun ACC builtin int type */
1985 type
= read_sun_builtin_type (pp
, typenums
, objfile
);
1986 if (typenums
[0] != -1)
1987 *dbx_lookup_type (typenums
, objfile
) = type
;
1991 case 'R': /* Sun ACC builtin float type */
1992 type
= read_sun_floating_type (pp
, typenums
, objfile
);
1993 if (typenums
[0] != -1)
1994 *dbx_lookup_type (typenums
, objfile
) = type
;
1997 case 'e': /* Enumeration type */
1998 type
= dbx_alloc_type (typenums
, objfile
);
1999 type
= read_enum_type (pp
, type
, objfile
);
2000 if (typenums
[0] != -1)
2001 *dbx_lookup_type (typenums
, objfile
) = type
;
2004 case 's': /* Struct type */
2005 case 'u': /* Union type */
2007 enum type_code type_code
= TYPE_CODE_UNDEF
;
2008 type
= dbx_alloc_type (typenums
, objfile
);
2009 switch (type_descriptor
)
2012 type_code
= TYPE_CODE_STRUCT
;
2015 type_code
= TYPE_CODE_UNION
;
2018 type
= read_struct_type (pp
, type
, type_code
, objfile
);
2022 case 'a': /* Array type */
2024 return error_type (pp
, objfile
);
2027 type
= dbx_alloc_type (typenums
, objfile
);
2028 type
= read_array_type (pp
, type
, objfile
);
2030 TYPE_CODE (type
) = TYPE_CODE_STRING
;
2032 make_vector_type (type
);
2035 case 'S': /* Set type */
2036 type1
= read_type (pp
, objfile
);
2037 type
= create_set_type (NULL
, type1
);
2038 if (typenums
[0] != -1)
2039 *dbx_lookup_type (typenums
, objfile
) = type
;
2043 --*pp
; /* Go back to the symbol in error. */
2044 /* Particularly important if it was \0! */
2045 return error_type (pp
, objfile
);
2050 warning (_("GDB internal error, type is NULL in stabsread.c."));
2051 return error_type (pp
, objfile
);
2054 /* Size specified in a type attribute overrides any other size. */
2055 if (type_size
!= -1)
2056 TYPE_LENGTH (type
) = (type_size
+ TARGET_CHAR_BIT
- 1) / TARGET_CHAR_BIT
;
2061 /* RS/6000 xlc/dbx combination uses a set of builtin types, starting from -1.
2062 Return the proper type node for a given builtin type number. */
2064 static const struct objfile_key
<struct type
*,
2065 gdb::noop_deleter
<struct type
*>>
2066 rs6000_builtin_type_data
;
2068 static struct type
*
2069 rs6000_builtin_type (int typenum
, struct objfile
*objfile
)
2071 struct type
**negative_types
= rs6000_builtin_type_data
.get (objfile
);
2073 /* We recognize types numbered from -NUMBER_RECOGNIZED to -1. */
2074 #define NUMBER_RECOGNIZED 34
2075 struct type
*rettype
= NULL
;
2077 if (typenum
>= 0 || typenum
< -NUMBER_RECOGNIZED
)
2079 complaint (_("Unknown builtin type %d"), typenum
);
2080 return objfile_type (objfile
)->builtin_error
;
2083 if (!negative_types
)
2085 /* This includes an empty slot for type number -0. */
2086 negative_types
= OBSTACK_CALLOC (&objfile
->objfile_obstack
,
2087 NUMBER_RECOGNIZED
+ 1, struct type
*);
2088 rs6000_builtin_type_data
.set (objfile
, negative_types
);
2091 if (negative_types
[-typenum
] != NULL
)
2092 return negative_types
[-typenum
];
2094 #if TARGET_CHAR_BIT != 8
2095 #error This code wrong for TARGET_CHAR_BIT not 8
2096 /* These definitions all assume that TARGET_CHAR_BIT is 8. I think
2097 that if that ever becomes not true, the correct fix will be to
2098 make the size in the struct type to be in bits, not in units of
2105 /* The size of this and all the other types are fixed, defined
2106 by the debugging format. If there is a type called "int" which
2107 is other than 32 bits, then it should use a new negative type
2108 number (or avoid negative type numbers for that case).
2109 See stabs.texinfo. */
2110 rettype
= init_integer_type (objfile
, 32, 0, "int");
2113 rettype
= init_integer_type (objfile
, 8, 0, "char");
2114 TYPE_NOSIGN (rettype
) = 1;
2117 rettype
= init_integer_type (objfile
, 16, 0, "short");
2120 rettype
= init_integer_type (objfile
, 32, 0, "long");
2123 rettype
= init_integer_type (objfile
, 8, 1, "unsigned char");
2126 rettype
= init_integer_type (objfile
, 8, 0, "signed char");
2129 rettype
= init_integer_type (objfile
, 16, 1, "unsigned short");
2132 rettype
= init_integer_type (objfile
, 32, 1, "unsigned int");
2135 rettype
= init_integer_type (objfile
, 32, 1, "unsigned");
2138 rettype
= init_integer_type (objfile
, 32, 1, "unsigned long");
2141 rettype
= init_type (objfile
, TYPE_CODE_VOID
, TARGET_CHAR_BIT
, "void");
2144 /* IEEE single precision (32 bit). */
2145 rettype
= init_float_type (objfile
, 32, "float",
2146 floatformats_ieee_single
);
2149 /* IEEE double precision (64 bit). */
2150 rettype
= init_float_type (objfile
, 64, "double",
2151 floatformats_ieee_double
);
2154 /* This is an IEEE double on the RS/6000, and different machines with
2155 different sizes for "long double" should use different negative
2156 type numbers. See stabs.texinfo. */
2157 rettype
= init_float_type (objfile
, 64, "long double",
2158 floatformats_ieee_double
);
2161 rettype
= init_integer_type (objfile
, 32, 0, "integer");
2164 rettype
= init_boolean_type (objfile
, 32, 1, "boolean");
2167 rettype
= init_float_type (objfile
, 32, "short real",
2168 floatformats_ieee_single
);
2171 rettype
= init_float_type (objfile
, 64, "real",
2172 floatformats_ieee_double
);
2175 rettype
= init_type (objfile
, TYPE_CODE_ERROR
, 0, "stringptr");
2178 rettype
= init_character_type (objfile
, 8, 1, "character");
2181 rettype
= init_boolean_type (objfile
, 8, 1, "logical*1");
2184 rettype
= init_boolean_type (objfile
, 16, 1, "logical*2");
2187 rettype
= init_boolean_type (objfile
, 32, 1, "logical*4");
2190 rettype
= init_boolean_type (objfile
, 32, 1, "logical");
2193 /* Complex type consisting of two IEEE single precision values. */
2194 rettype
= init_complex_type (objfile
, "complex",
2195 rs6000_builtin_type (12, objfile
));
2198 /* Complex type consisting of two IEEE double precision values. */
2199 rettype
= init_complex_type (objfile
, "double complex",
2200 rs6000_builtin_type (13, objfile
));
2203 rettype
= init_integer_type (objfile
, 8, 0, "integer*1");
2206 rettype
= init_integer_type (objfile
, 16, 0, "integer*2");
2209 rettype
= init_integer_type (objfile
, 32, 0, "integer*4");
2212 rettype
= init_character_type (objfile
, 16, 0, "wchar");
2215 rettype
= init_integer_type (objfile
, 64, 0, "long long");
2218 rettype
= init_integer_type (objfile
, 64, 1, "unsigned long long");
2221 rettype
= init_integer_type (objfile
, 64, 1, "logical*8");
2224 rettype
= init_integer_type (objfile
, 64, 0, "integer*8");
2227 negative_types
[-typenum
] = rettype
;
2231 /* This page contains subroutines of read_type. */
2233 /* Wrapper around method_name_from_physname to flag a complaint
2234 if there is an error. */
2237 stabs_method_name_from_physname (const char *physname
)
2241 method_name
= method_name_from_physname (physname
);
2243 if (method_name
== NULL
)
2245 complaint (_("Method has bad physname %s\n"), physname
);
2252 /* Read member function stabs info for C++ classes. The form of each member
2255 NAME :: TYPENUM[=type definition] ARGS : PHYSNAME ;
2257 An example with two member functions is:
2259 afunc1::20=##15;:i;2A.;afunc2::20:i;2A.;
2261 For the case of overloaded operators, the format is op$::*.funcs, where
2262 $ is the CPLUS_MARKER (usually '$'), `*' holds the place for an operator
2263 name (such as `+=') and `.' marks the end of the operator name.
2265 Returns 1 for success, 0 for failure. */
2268 read_member_functions (struct stab_field_info
*fip
, const char **pp
,
2269 struct type
*type
, struct objfile
*objfile
)
2276 struct next_fnfield
*next
;
2277 struct fn_field fn_field
;
2280 struct type
*look_ahead_type
;
2281 struct next_fnfieldlist
*new_fnlist
;
2282 struct next_fnfield
*new_sublist
;
2286 /* Process each list until we find something that is not a member function
2287 or find the end of the functions. */
2291 /* We should be positioned at the start of the function name.
2292 Scan forward to find the first ':' and if it is not the
2293 first of a "::" delimiter, then this is not a member function. */
2305 look_ahead_type
= NULL
;
2308 new_fnlist
= OBSTACK_ZALLOC (&fip
->obstack
, struct next_fnfieldlist
);
2310 if ((*pp
)[0] == 'o' && (*pp
)[1] == 'p' && is_cplus_marker ((*pp
)[2]))
2312 /* This is a completely wierd case. In order to stuff in the
2313 names that might contain colons (the usual name delimiter),
2314 Mike Tiemann defined a different name format which is
2315 signalled if the identifier is "op$". In that case, the
2316 format is "op$::XXXX." where XXXX is the name. This is
2317 used for names like "+" or "=". YUUUUUUUK! FIXME! */
2318 /* This lets the user type "break operator+".
2319 We could just put in "+" as the name, but that wouldn't
2321 static char opname
[32] = "op$";
2322 char *o
= opname
+ 3;
2324 /* Skip past '::'. */
2327 STABS_CONTINUE (pp
, objfile
);
2333 main_fn_name
= savestring (opname
, o
- opname
);
2339 main_fn_name
= savestring (*pp
, p
- *pp
);
2340 /* Skip past '::'. */
2343 new_fnlist
->fn_fieldlist
.name
= main_fn_name
;
2347 new_sublist
= OBSTACK_ZALLOC (&fip
->obstack
, struct next_fnfield
);
2349 /* Check for and handle cretinous dbx symbol name continuation! */
2350 if (look_ahead_type
== NULL
)
2353 STABS_CONTINUE (pp
, objfile
);
2355 new_sublist
->fn_field
.type
= read_type (pp
, objfile
);
2358 /* Invalid symtab info for member function. */
2364 /* g++ version 1 kludge */
2365 new_sublist
->fn_field
.type
= look_ahead_type
;
2366 look_ahead_type
= NULL
;
2376 /* These are methods, not functions. */
2377 if (TYPE_CODE (new_sublist
->fn_field
.type
) == TYPE_CODE_FUNC
)
2378 TYPE_CODE (new_sublist
->fn_field
.type
) = TYPE_CODE_METHOD
;
2380 gdb_assert (TYPE_CODE (new_sublist
->fn_field
.type
)
2381 == TYPE_CODE_METHOD
);
2383 /* If this is just a stub, then we don't have the real name here. */
2384 if (TYPE_STUB (new_sublist
->fn_field
.type
))
2386 if (!TYPE_SELF_TYPE (new_sublist
->fn_field
.type
))
2387 set_type_self_type (new_sublist
->fn_field
.type
, type
);
2388 new_sublist
->fn_field
.is_stub
= 1;
2391 new_sublist
->fn_field
.physname
= savestring (*pp
, p
- *pp
);
2394 /* Set this member function's visibility fields. */
2397 case VISIBILITY_PRIVATE
:
2398 new_sublist
->fn_field
.is_private
= 1;
2400 case VISIBILITY_PROTECTED
:
2401 new_sublist
->fn_field
.is_protected
= 1;
2405 STABS_CONTINUE (pp
, objfile
);
2408 case 'A': /* Normal functions. */
2409 new_sublist
->fn_field
.is_const
= 0;
2410 new_sublist
->fn_field
.is_volatile
= 0;
2413 case 'B': /* `const' member functions. */
2414 new_sublist
->fn_field
.is_const
= 1;
2415 new_sublist
->fn_field
.is_volatile
= 0;
2418 case 'C': /* `volatile' member function. */
2419 new_sublist
->fn_field
.is_const
= 0;
2420 new_sublist
->fn_field
.is_volatile
= 1;
2423 case 'D': /* `const volatile' member function. */
2424 new_sublist
->fn_field
.is_const
= 1;
2425 new_sublist
->fn_field
.is_volatile
= 1;
2428 case '*': /* File compiled with g++ version 1 --
2434 complaint (_("const/volatile indicator missing, got '%c'"),
2444 /* virtual member function, followed by index.
2445 The sign bit is set to distinguish pointers-to-methods
2446 from virtual function indicies. Since the array is
2447 in words, the quantity must be shifted left by 1
2448 on 16 bit machine, and by 2 on 32 bit machine, forcing
2449 the sign bit out, and usable as a valid index into
2450 the array. Remove the sign bit here. */
2451 new_sublist
->fn_field
.voffset
=
2452 (0x7fffffff & read_huge_number (pp
, ';', &nbits
, 0)) + 2;
2456 STABS_CONTINUE (pp
, objfile
);
2457 if (**pp
== ';' || **pp
== '\0')
2459 /* Must be g++ version 1. */
2460 new_sublist
->fn_field
.fcontext
= 0;
2464 /* Figure out from whence this virtual function came.
2465 It may belong to virtual function table of
2466 one of its baseclasses. */
2467 look_ahead_type
= read_type (pp
, objfile
);
2470 /* g++ version 1 overloaded methods. */
2474 new_sublist
->fn_field
.fcontext
= look_ahead_type
;
2483 look_ahead_type
= NULL
;
2489 /* static member function. */
2491 int slen
= strlen (main_fn_name
);
2493 new_sublist
->fn_field
.voffset
= VOFFSET_STATIC
;
2495 /* For static member functions, we can't tell if they
2496 are stubbed, as they are put out as functions, and not as
2498 GCC v2 emits the fully mangled name if
2499 dbxout.c:flag_minimal_debug is not set, so we have to
2500 detect a fully mangled physname here and set is_stub
2501 accordingly. Fully mangled physnames in v2 start with
2502 the member function name, followed by two underscores.
2503 GCC v3 currently always emits stubbed member functions,
2504 but with fully mangled physnames, which start with _Z. */
2505 if (!(strncmp (new_sublist
->fn_field
.physname
,
2506 main_fn_name
, slen
) == 0
2507 && new_sublist
->fn_field
.physname
[slen
] == '_'
2508 && new_sublist
->fn_field
.physname
[slen
+ 1] == '_'))
2510 new_sublist
->fn_field
.is_stub
= 1;
2517 complaint (_("member function type missing, got '%c'"),
2519 /* Normal member function. */
2523 /* normal member function. */
2524 new_sublist
->fn_field
.voffset
= 0;
2525 new_sublist
->fn_field
.fcontext
= 0;
2529 new_sublist
->next
= sublist
;
2530 sublist
= new_sublist
;
2532 STABS_CONTINUE (pp
, objfile
);
2534 while (**pp
!= ';' && **pp
!= '\0');
2537 STABS_CONTINUE (pp
, objfile
);
2539 /* Skip GCC 3.X member functions which are duplicates of the callable
2540 constructor/destructor. */
2541 if (strcmp_iw (main_fn_name
, "__base_ctor ") == 0
2542 || strcmp_iw (main_fn_name
, "__base_dtor ") == 0
2543 || strcmp (main_fn_name
, "__deleting_dtor") == 0)
2545 xfree (main_fn_name
);
2549 int has_destructor
= 0, has_other
= 0;
2551 struct next_fnfield
*tmp_sublist
;
2553 /* Various versions of GCC emit various mostly-useless
2554 strings in the name field for special member functions.
2556 For stub methods, we need to defer correcting the name
2557 until we are ready to unstub the method, because the current
2558 name string is used by gdb_mangle_name. The only stub methods
2559 of concern here are GNU v2 operators; other methods have their
2560 names correct (see caveat below).
2562 For non-stub methods, in GNU v3, we have a complete physname.
2563 Therefore we can safely correct the name now. This primarily
2564 affects constructors and destructors, whose name will be
2565 __comp_ctor or __comp_dtor instead of Foo or ~Foo. Cast
2566 operators will also have incorrect names; for instance,
2567 "operator int" will be named "operator i" (i.e. the type is
2570 For non-stub methods in GNU v2, we have no easy way to
2571 know if we have a complete physname or not. For most
2572 methods the result depends on the platform (if CPLUS_MARKER
2573 can be `$' or `.', it will use minimal debug information, or
2574 otherwise the full physname will be included).
2576 Rather than dealing with this, we take a different approach.
2577 For v3 mangled names, we can use the full physname; for v2,
2578 we use cplus_demangle_opname (which is actually v2 specific),
2579 because the only interesting names are all operators - once again
2580 barring the caveat below. Skip this process if any method in the
2581 group is a stub, to prevent our fouling up the workings of
2584 The caveat: GCC 2.95.x (and earlier?) put constructors and
2585 destructors in the same method group. We need to split this
2586 into two groups, because they should have different names.
2587 So for each method group we check whether it contains both
2588 routines whose physname appears to be a destructor (the physnames
2589 for and destructors are always provided, due to quirks in v2
2590 mangling) and routines whose physname does not appear to be a
2591 destructor. If so then we break up the list into two halves.
2592 Even if the constructors and destructors aren't in the same group
2593 the destructor will still lack the leading tilde, so that also
2596 So, to summarize what we expect and handle here:
2598 Given Given Real Real Action
2599 method name physname physname method name
2601 __opi [none] __opi__3Foo operator int opname
2603 Foo _._3Foo _._3Foo ~Foo separate and
2605 operator i _ZN3FoocviEv _ZN3FoocviEv operator int demangle
2606 __comp_ctor _ZN3FooC1ERKS_ _ZN3FooC1ERKS_ Foo demangle
2609 tmp_sublist
= sublist
;
2610 while (tmp_sublist
!= NULL
)
2612 if (tmp_sublist
->fn_field
.physname
[0] == '_'
2613 && tmp_sublist
->fn_field
.physname
[1] == 'Z')
2616 if (is_destructor_name (tmp_sublist
->fn_field
.physname
))
2621 tmp_sublist
= tmp_sublist
->next
;
2624 if (has_destructor
&& has_other
)
2626 struct next_fnfieldlist
*destr_fnlist
;
2627 struct next_fnfield
*last_sublist
;
2629 /* Create a new fn_fieldlist for the destructors. */
2631 destr_fnlist
= OBSTACK_ZALLOC (&fip
->obstack
,
2632 struct next_fnfieldlist
);
2634 destr_fnlist
->fn_fieldlist
.name
2635 = obconcat (&objfile
->objfile_obstack
, "~",
2636 new_fnlist
->fn_fieldlist
.name
, (char *) NULL
);
2638 destr_fnlist
->fn_fieldlist
.fn_fields
=
2639 XOBNEWVEC (&objfile
->objfile_obstack
,
2640 struct fn_field
, has_destructor
);
2641 memset (destr_fnlist
->fn_fieldlist
.fn_fields
, 0,
2642 sizeof (struct fn_field
) * has_destructor
);
2643 tmp_sublist
= sublist
;
2644 last_sublist
= NULL
;
2646 while (tmp_sublist
!= NULL
)
2648 if (!is_destructor_name (tmp_sublist
->fn_field
.physname
))
2650 tmp_sublist
= tmp_sublist
->next
;
2654 destr_fnlist
->fn_fieldlist
.fn_fields
[i
++]
2655 = tmp_sublist
->fn_field
;
2657 last_sublist
->next
= tmp_sublist
->next
;
2659 sublist
= tmp_sublist
->next
;
2660 last_sublist
= tmp_sublist
;
2661 tmp_sublist
= tmp_sublist
->next
;
2664 destr_fnlist
->fn_fieldlist
.length
= has_destructor
;
2665 destr_fnlist
->next
= fip
->fnlist
;
2666 fip
->fnlist
= destr_fnlist
;
2668 length
-= has_destructor
;
2672 /* v3 mangling prevents the use of abbreviated physnames,
2673 so we can do this here. There are stubbed methods in v3
2675 - in -gstabs instead of -gstabs+
2676 - or for static methods, which are output as a function type
2677 instead of a method type. */
2678 char *new_method_name
=
2679 stabs_method_name_from_physname (sublist
->fn_field
.physname
);
2681 if (new_method_name
!= NULL
2682 && strcmp (new_method_name
,
2683 new_fnlist
->fn_fieldlist
.name
) != 0)
2685 new_fnlist
->fn_fieldlist
.name
= new_method_name
;
2686 xfree (main_fn_name
);
2689 xfree (new_method_name
);
2691 else if (has_destructor
&& new_fnlist
->fn_fieldlist
.name
[0] != '~')
2693 new_fnlist
->fn_fieldlist
.name
=
2694 obconcat (&objfile
->objfile_obstack
,
2695 "~", main_fn_name
, (char *)NULL
);
2696 xfree (main_fn_name
);
2699 new_fnlist
->fn_fieldlist
.fn_fields
2700 = OBSTACK_CALLOC (&objfile
->objfile_obstack
, length
, fn_field
);
2701 for (i
= length
; (i
--, sublist
); sublist
= sublist
->next
)
2703 new_fnlist
->fn_fieldlist
.fn_fields
[i
] = sublist
->fn_field
;
2706 new_fnlist
->fn_fieldlist
.length
= length
;
2707 new_fnlist
->next
= fip
->fnlist
;
2708 fip
->fnlist
= new_fnlist
;
2715 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
2716 TYPE_FN_FIELDLISTS (type
) = (struct fn_fieldlist
*)
2717 TYPE_ALLOC (type
, sizeof (struct fn_fieldlist
) * nfn_fields
);
2718 memset (TYPE_FN_FIELDLISTS (type
), 0,
2719 sizeof (struct fn_fieldlist
) * nfn_fields
);
2720 TYPE_NFN_FIELDS (type
) = nfn_fields
;
2726 /* Special GNU C++ name.
2728 Returns 1 for success, 0 for failure. "failure" means that we can't
2729 keep parsing and it's time for error_type(). */
2732 read_cpp_abbrev (struct stab_field_info
*fip
, const char **pp
,
2733 struct type
*type
, struct objfile
*objfile
)
2738 struct type
*context
;
2748 /* At this point, *pp points to something like "22:23=*22...",
2749 where the type number before the ':' is the "context" and
2750 everything after is a regular type definition. Lookup the
2751 type, find it's name, and construct the field name. */
2753 context
= read_type (pp
, objfile
);
2757 case 'f': /* $vf -- a virtual function table pointer */
2758 name
= TYPE_NAME (context
);
2763 fip
->list
->field
.name
= obconcat (&objfile
->objfile_obstack
,
2764 vptr_name
, name
, (char *) NULL
);
2767 case 'b': /* $vb -- a virtual bsomethingorother */
2768 name
= TYPE_NAME (context
);
2771 complaint (_("C++ abbreviated type name "
2772 "unknown at symtab pos %d"),
2776 fip
->list
->field
.name
= obconcat (&objfile
->objfile_obstack
, vb_name
,
2777 name
, (char *) NULL
);
2781 invalid_cpp_abbrev_complaint (*pp
);
2782 fip
->list
->field
.name
= obconcat (&objfile
->objfile_obstack
,
2783 "INVALID_CPLUSPLUS_ABBREV",
2788 /* At this point, *pp points to the ':'. Skip it and read the
2794 invalid_cpp_abbrev_complaint (*pp
);
2797 fip
->list
->field
.type
= read_type (pp
, objfile
);
2799 (*pp
)++; /* Skip the comma. */
2806 SET_FIELD_BITPOS (fip
->list
->field
,
2807 read_huge_number (pp
, ';', &nbits
, 0));
2811 /* This field is unpacked. */
2812 FIELD_BITSIZE (fip
->list
->field
) = 0;
2813 fip
->list
->visibility
= VISIBILITY_PRIVATE
;
2817 invalid_cpp_abbrev_complaint (*pp
);
2818 /* We have no idea what syntax an unrecognized abbrev would have, so
2819 better return 0. If we returned 1, we would need to at least advance
2820 *pp to avoid an infinite loop. */
2827 read_one_struct_field (struct stab_field_info
*fip
, const char **pp
,
2828 const char *p
, struct type
*type
,
2829 struct objfile
*objfile
)
2831 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
2833 fip
->list
->field
.name
2834 = obstack_strndup (&objfile
->objfile_obstack
, *pp
, p
- *pp
);
2837 /* This means we have a visibility for a field coming. */
2841 fip
->list
->visibility
= *(*pp
)++;
2845 /* normal dbx-style format, no explicit visibility */
2846 fip
->list
->visibility
= VISIBILITY_PUBLIC
;
2849 fip
->list
->field
.type
= read_type (pp
, objfile
);
2854 /* Possible future hook for nested types. */
2857 fip
->list
->field
.bitpos
= (long) -2; /* nested type */
2867 /* Static class member. */
2868 SET_FIELD_PHYSNAME (fip
->list
->field
, savestring (*pp
, p
- *pp
));
2872 else if (**pp
!= ',')
2874 /* Bad structure-type format. */
2875 stabs_general_complaint ("bad structure-type format");
2879 (*pp
)++; /* Skip the comma. */
2884 SET_FIELD_BITPOS (fip
->list
->field
,
2885 read_huge_number (pp
, ',', &nbits
, 0));
2888 stabs_general_complaint ("bad structure-type format");
2891 FIELD_BITSIZE (fip
->list
->field
) = read_huge_number (pp
, ';', &nbits
, 0);
2894 stabs_general_complaint ("bad structure-type format");
2899 if (FIELD_BITPOS (fip
->list
->field
) == 0
2900 && FIELD_BITSIZE (fip
->list
->field
) == 0)
2902 /* This can happen in two cases: (1) at least for gcc 2.4.5 or so,
2903 it is a field which has been optimized out. The correct stab for
2904 this case is to use VISIBILITY_IGNORE, but that is a recent
2905 invention. (2) It is a 0-size array. For example
2906 union { int num; char str[0]; } foo. Printing _("<no value>" for
2907 str in "p foo" is OK, since foo.str (and thus foo.str[3])
2908 will continue to work, and a 0-size array as a whole doesn't
2909 have any contents to print.
2911 I suspect this probably could also happen with gcc -gstabs (not
2912 -gstabs+) for static fields, and perhaps other C++ extensions.
2913 Hopefully few people use -gstabs with gdb, since it is intended
2914 for dbx compatibility. */
2916 /* Ignore this field. */
2917 fip
->list
->visibility
= VISIBILITY_IGNORE
;
2921 /* Detect an unpacked field and mark it as such.
2922 dbx gives a bit size for all fields.
2923 Note that forward refs cannot be packed,
2924 and treat enums as if they had the width of ints. */
2926 struct type
*field_type
= check_typedef (FIELD_TYPE (fip
->list
->field
));
2928 if (TYPE_CODE (field_type
) != TYPE_CODE_INT
2929 && TYPE_CODE (field_type
) != TYPE_CODE_RANGE
2930 && TYPE_CODE (field_type
) != TYPE_CODE_BOOL
2931 && TYPE_CODE (field_type
) != TYPE_CODE_ENUM
)
2933 FIELD_BITSIZE (fip
->list
->field
) = 0;
2935 if ((FIELD_BITSIZE (fip
->list
->field
)
2936 == TARGET_CHAR_BIT
* TYPE_LENGTH (field_type
)
2937 || (TYPE_CODE (field_type
) == TYPE_CODE_ENUM
2938 && FIELD_BITSIZE (fip
->list
->field
)
2939 == gdbarch_int_bit (gdbarch
))
2942 FIELD_BITPOS (fip
->list
->field
) % 8 == 0)
2944 FIELD_BITSIZE (fip
->list
->field
) = 0;
2950 /* Read struct or class data fields. They have the form:
2952 NAME : [VISIBILITY] TYPENUM , BITPOS , BITSIZE ;
2954 At the end, we see a semicolon instead of a field.
2956 In C++, this may wind up being NAME:?TYPENUM:PHYSNAME; for
2959 The optional VISIBILITY is one of:
2961 '/0' (VISIBILITY_PRIVATE)
2962 '/1' (VISIBILITY_PROTECTED)
2963 '/2' (VISIBILITY_PUBLIC)
2964 '/9' (VISIBILITY_IGNORE)
2966 or nothing, for C style fields with public visibility.
2968 Returns 1 for success, 0 for failure. */
2971 read_struct_fields (struct stab_field_info
*fip
, const char **pp
,
2972 struct type
*type
, struct objfile
*objfile
)
2975 struct nextfield
*newobj
;
2977 /* We better set p right now, in case there are no fields at all... */
2981 /* Read each data member type until we find the terminating ';' at the end of
2982 the data member list, or break for some other reason such as finding the
2983 start of the member function list. */
2984 /* Stab string for structure/union does not end with two ';' in
2985 SUN C compiler 5.3 i.e. F6U2, hence check for end of string. */
2987 while (**pp
!= ';' && **pp
!= '\0')
2989 STABS_CONTINUE (pp
, objfile
);
2990 /* Get space to record the next field's data. */
2991 newobj
= OBSTACK_ZALLOC (&fip
->obstack
, struct nextfield
);
2993 newobj
->next
= fip
->list
;
2996 /* Get the field name. */
2999 /* If is starts with CPLUS_MARKER it is a special abbreviation,
3000 unless the CPLUS_MARKER is followed by an underscore, in
3001 which case it is just the name of an anonymous type, which we
3002 should handle like any other type name. */
3004 if (is_cplus_marker (p
[0]) && p
[1] != '_')
3006 if (!read_cpp_abbrev (fip
, pp
, type
, objfile
))
3011 /* Look for the ':' that separates the field name from the field
3012 values. Data members are delimited by a single ':', while member
3013 functions are delimited by a pair of ':'s. When we hit the member
3014 functions (if any), terminate scan loop and return. */
3016 while (*p
!= ':' && *p
!= '\0')
3023 /* Check to see if we have hit the member functions yet. */
3028 read_one_struct_field (fip
, pp
, p
, type
, objfile
);
3030 if (p
[0] == ':' && p
[1] == ':')
3032 /* (the deleted) chill the list of fields: the last entry (at
3033 the head) is a partially constructed entry which we now
3035 fip
->list
= fip
->list
->next
;
3040 /* The stabs for C++ derived classes contain baseclass information which
3041 is marked by a '!' character after the total size. This function is
3042 called when we encounter the baseclass marker, and slurps up all the
3043 baseclass information.
3045 Immediately following the '!' marker is the number of base classes that
3046 the class is derived from, followed by information for each base class.
3047 For each base class, there are two visibility specifiers, a bit offset
3048 to the base class information within the derived class, a reference to
3049 the type for the base class, and a terminating semicolon.
3051 A typical example, with two base classes, would be "!2,020,19;0264,21;".
3053 Baseclass information marker __________________|| | | | | | |
3054 Number of baseclasses __________________________| | | | | | |
3055 Visibility specifiers (2) ________________________| | | | | |
3056 Offset in bits from start of class _________________| | | | |
3057 Type number for base class ___________________________| | | |
3058 Visibility specifiers (2) _______________________________| | |
3059 Offset in bits from start of class ________________________| |
3060 Type number of base class ____________________________________|
3062 Return 1 for success, 0 for (error-type-inducing) failure. */
3068 read_baseclasses (struct stab_field_info
*fip
, const char **pp
,
3069 struct type
*type
, struct objfile
*objfile
)
3072 struct nextfield
*newobj
;
3080 /* Skip the '!' baseclass information marker. */
3084 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
3088 TYPE_N_BASECLASSES (type
) = read_huge_number (pp
, ',', &nbits
, 0);
3094 /* Some stupid compilers have trouble with the following, so break
3095 it up into simpler expressions. */
3096 TYPE_FIELD_VIRTUAL_BITS (type
) = (B_TYPE
*)
3097 TYPE_ALLOC (type
, B_BYTES (TYPE_N_BASECLASSES (type
)));
3100 int num_bytes
= B_BYTES (TYPE_N_BASECLASSES (type
));
3103 pointer
= (char *) TYPE_ALLOC (type
, num_bytes
);
3104 TYPE_FIELD_VIRTUAL_BITS (type
) = (B_TYPE
*) pointer
;
3108 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type
), TYPE_N_BASECLASSES (type
));
3110 for (i
= 0; i
< TYPE_N_BASECLASSES (type
); i
++)
3112 newobj
= OBSTACK_ZALLOC (&fip
->obstack
, struct nextfield
);
3114 newobj
->next
= fip
->list
;
3116 FIELD_BITSIZE (newobj
->field
) = 0; /* This should be an unpacked
3119 STABS_CONTINUE (pp
, objfile
);
3123 /* Nothing to do. */
3126 SET_TYPE_FIELD_VIRTUAL (type
, i
);
3129 /* Unknown character. Complain and treat it as non-virtual. */
3131 complaint (_("Unknown virtual character `%c' for baseclass"),
3137 newobj
->visibility
= *(*pp
)++;
3138 switch (newobj
->visibility
)
3140 case VISIBILITY_PRIVATE
:
3141 case VISIBILITY_PROTECTED
:
3142 case VISIBILITY_PUBLIC
:
3145 /* Bad visibility format. Complain and treat it as
3148 complaint (_("Unknown visibility `%c' for baseclass"),
3149 newobj
->visibility
);
3150 newobj
->visibility
= VISIBILITY_PUBLIC
;
3157 /* The remaining value is the bit offset of the portion of the object
3158 corresponding to this baseclass. Always zero in the absence of
3159 multiple inheritance. */
3161 SET_FIELD_BITPOS (newobj
->field
, read_huge_number (pp
, ',', &nbits
, 0));
3166 /* The last piece of baseclass information is the type of the
3167 base class. Read it, and remember it's type name as this
3170 newobj
->field
.type
= read_type (pp
, objfile
);
3171 newobj
->field
.name
= TYPE_NAME (newobj
->field
.type
);
3173 /* Skip trailing ';' and bump count of number of fields seen. */
3182 /* The tail end of stabs for C++ classes that contain a virtual function
3183 pointer contains a tilde, a %, and a type number.
3184 The type number refers to the base class (possibly this class itself) which
3185 contains the vtable pointer for the current class.
3187 This function is called when we have parsed all the method declarations,
3188 so we can look for the vptr base class info. */
3191 read_tilde_fields (struct stab_field_info
*fip
, const char **pp
,
3192 struct type
*type
, struct objfile
*objfile
)
3196 STABS_CONTINUE (pp
, objfile
);
3198 /* If we are positioned at a ';', then skip it. */
3208 if (**pp
== '=' || **pp
== '+' || **pp
== '-')
3210 /* Obsolete flags that used to indicate the presence
3211 of constructors and/or destructors. */
3215 /* Read either a '%' or the final ';'. */
3216 if (*(*pp
)++ == '%')
3218 /* The next number is the type number of the base class
3219 (possibly our own class) which supplies the vtable for
3220 this class. Parse it out, and search that class to find
3221 its vtable pointer, and install those into TYPE_VPTR_BASETYPE
3222 and TYPE_VPTR_FIELDNO. */
3227 t
= read_type (pp
, objfile
);
3229 while (*p
!= '\0' && *p
!= ';')
3235 /* Premature end of symbol. */
3239 set_type_vptr_basetype (type
, t
);
3240 if (type
== t
) /* Our own class provides vtbl ptr. */
3242 for (i
= TYPE_NFIELDS (t
) - 1;
3243 i
>= TYPE_N_BASECLASSES (t
);
3246 const char *name
= TYPE_FIELD_NAME (t
, i
);
3248 if (!strncmp (name
, vptr_name
, sizeof (vptr_name
) - 2)
3249 && is_cplus_marker (name
[sizeof (vptr_name
) - 2]))
3251 set_type_vptr_fieldno (type
, i
);
3255 /* Virtual function table field not found. */
3256 complaint (_("virtual function table pointer "
3257 "not found when defining class `%s'"),
3263 set_type_vptr_fieldno (type
, TYPE_VPTR_FIELDNO (t
));
3274 attach_fn_fields_to_type (struct stab_field_info
*fip
, struct type
*type
)
3278 for (n
= TYPE_NFN_FIELDS (type
);
3279 fip
->fnlist
!= NULL
;
3280 fip
->fnlist
= fip
->fnlist
->next
)
3282 --n
; /* Circumvent Sun3 compiler bug. */
3283 TYPE_FN_FIELDLISTS (type
)[n
] = fip
->fnlist
->fn_fieldlist
;
3288 /* Create the vector of fields, and record how big it is.
3289 We need this info to record proper virtual function table information
3290 for this class's virtual functions. */
3293 attach_fields_to_type (struct stab_field_info
*fip
, struct type
*type
,
3294 struct objfile
*objfile
)
3297 int non_public_fields
= 0;
3298 struct nextfield
*scan
;
3300 /* Count up the number of fields that we have, as well as taking note of
3301 whether or not there are any non-public fields, which requires us to
3302 allocate and build the private_field_bits and protected_field_bits
3305 for (scan
= fip
->list
; scan
!= NULL
; scan
= scan
->next
)
3308 if (scan
->visibility
!= VISIBILITY_PUBLIC
)
3310 non_public_fields
++;
3314 /* Now we know how many fields there are, and whether or not there are any
3315 non-public fields. Record the field count, allocate space for the
3316 array of fields, and create blank visibility bitfields if necessary. */
3318 TYPE_NFIELDS (type
) = nfields
;
3319 TYPE_FIELDS (type
) = (struct field
*)
3320 TYPE_ALLOC (type
, sizeof (struct field
) * nfields
);
3321 memset (TYPE_FIELDS (type
), 0, sizeof (struct field
) * nfields
);
3323 if (non_public_fields
)
3325 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
3327 TYPE_FIELD_PRIVATE_BITS (type
) =
3328 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
3329 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type
), nfields
);
3331 TYPE_FIELD_PROTECTED_BITS (type
) =
3332 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
3333 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type
), nfields
);
3335 TYPE_FIELD_IGNORE_BITS (type
) =
3336 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
3337 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type
), nfields
);
3340 /* Copy the saved-up fields into the field vector. Start from the
3341 head of the list, adding to the tail of the field array, so that
3342 they end up in the same order in the array in which they were
3343 added to the list. */
3345 while (nfields
-- > 0)
3347 TYPE_FIELD (type
, nfields
) = fip
->list
->field
;
3348 switch (fip
->list
->visibility
)
3350 case VISIBILITY_PRIVATE
:
3351 SET_TYPE_FIELD_PRIVATE (type
, nfields
);
3354 case VISIBILITY_PROTECTED
:
3355 SET_TYPE_FIELD_PROTECTED (type
, nfields
);
3358 case VISIBILITY_IGNORE
:
3359 SET_TYPE_FIELD_IGNORE (type
, nfields
);
3362 case VISIBILITY_PUBLIC
:
3366 /* Unknown visibility. Complain and treat it as public. */
3368 complaint (_("Unknown visibility `%c' for field"),
3369 fip
->list
->visibility
);
3373 fip
->list
= fip
->list
->next
;
3379 /* Complain that the compiler has emitted more than one definition for the
3380 structure type TYPE. */
3382 complain_about_struct_wipeout (struct type
*type
)
3384 const char *name
= "";
3385 const char *kind
= "";
3387 if (TYPE_NAME (type
))
3389 name
= TYPE_NAME (type
);
3390 switch (TYPE_CODE (type
))
3392 case TYPE_CODE_STRUCT
: kind
= "struct "; break;
3393 case TYPE_CODE_UNION
: kind
= "union "; break;
3394 case TYPE_CODE_ENUM
: kind
= "enum "; break;
3404 complaint (_("struct/union type gets multiply defined: %s%s"), kind
, name
);
3407 /* Set the length for all variants of a same main_type, which are
3408 connected in the closed chain.
3410 This is something that needs to be done when a type is defined *after*
3411 some cross references to this type have already been read. Consider
3412 for instance the following scenario where we have the following two
3415 .stabs "t:p(0,21)=*(0,22)=k(0,23)=xsdummy:",160,0,28,-24
3416 .stabs "dummy:T(0,23)=s16x:(0,1),0,3[...]"
3418 A stubbed version of type dummy is created while processing the first
3419 stabs entry. The length of that type is initially set to zero, since
3420 it is unknown at this point. Also, a "constant" variation of type
3421 "dummy" is created as well (this is the "(0,22)=k(0,23)" section of
3424 The second stabs entry allows us to replace the stubbed definition
3425 with the real definition. However, we still need to adjust the length
3426 of the "constant" variation of that type, as its length was left
3427 untouched during the main type replacement... */
3430 set_length_in_type_chain (struct type
*type
)
3432 struct type
*ntype
= TYPE_CHAIN (type
);
3434 while (ntype
!= type
)
3436 if (TYPE_LENGTH(ntype
) == 0)
3437 TYPE_LENGTH (ntype
) = TYPE_LENGTH (type
);
3439 complain_about_struct_wipeout (ntype
);
3440 ntype
= TYPE_CHAIN (ntype
);
3444 /* Read the description of a structure (or union type) and return an object
3445 describing the type.
3447 PP points to a character pointer that points to the next unconsumed token
3448 in the stabs string. For example, given stabs "A:T4=s4a:1,0,32;;",
3449 *PP will point to "4a:1,0,32;;".
3451 TYPE points to an incomplete type that needs to be filled in.
3453 OBJFILE points to the current objfile from which the stabs information is
3454 being read. (Note that it is redundant in that TYPE also contains a pointer
3455 to this same objfile, so it might be a good idea to eliminate it. FIXME).
3458 static struct type
*
3459 read_struct_type (const char **pp
, struct type
*type
, enum type_code type_code
,
3460 struct objfile
*objfile
)
3462 struct stab_field_info fi
;
3464 /* When describing struct/union/class types in stabs, G++ always drops
3465 all qualifications from the name. So if you've got:
3466 struct A { ... struct B { ... }; ... };
3467 then G++ will emit stabs for `struct A::B' that call it simply
3468 `struct B'. Obviously, if you've got a real top-level definition for
3469 `struct B', or other nested definitions, this is going to cause
3472 Obviously, GDB can't fix this by itself, but it can at least avoid
3473 scribbling on existing structure type objects when new definitions
3475 if (! (TYPE_CODE (type
) == TYPE_CODE_UNDEF
3476 || TYPE_STUB (type
)))
3478 complain_about_struct_wipeout (type
);
3480 /* It's probably best to return the type unchanged. */
3484 INIT_CPLUS_SPECIFIC (type
);
3485 TYPE_CODE (type
) = type_code
;
3486 TYPE_STUB (type
) = 0;
3488 /* First comes the total size in bytes. */
3493 TYPE_LENGTH (type
) = read_huge_number (pp
, 0, &nbits
, 0);
3495 return error_type (pp
, objfile
);
3496 set_length_in_type_chain (type
);
3499 /* Now read the baseclasses, if any, read the regular C struct or C++
3500 class member fields, attach the fields to the type, read the C++
3501 member functions, attach them to the type, and then read any tilde
3502 field (baseclass specifier for the class holding the main vtable). */
3504 if (!read_baseclasses (&fi
, pp
, type
, objfile
)
3505 || !read_struct_fields (&fi
, pp
, type
, objfile
)
3506 || !attach_fields_to_type (&fi
, type
, objfile
)
3507 || !read_member_functions (&fi
, pp
, type
, objfile
)
3508 || !attach_fn_fields_to_type (&fi
, type
)
3509 || !read_tilde_fields (&fi
, pp
, type
, objfile
))
3511 type
= error_type (pp
, objfile
);
3517 /* Read a definition of an array type,
3518 and create and return a suitable type object.
3519 Also creates a range type which represents the bounds of that
3522 static struct type
*
3523 read_array_type (const char **pp
, struct type
*type
,
3524 struct objfile
*objfile
)
3526 struct type
*index_type
, *element_type
, *range_type
;
3531 /* Format of an array type:
3532 "ar<index type>;lower;upper;<array_contents_type>".
3533 OS9000: "arlower,upper;<array_contents_type>".
3535 Fortran adjustable arrays use Adigits or Tdigits for lower or upper;
3536 for these, produce a type like float[][]. */
3539 index_type
= read_type (pp
, objfile
);
3541 /* Improper format of array type decl. */
3542 return error_type (pp
, objfile
);
3546 if (!(**pp
>= '0' && **pp
<= '9') && **pp
!= '-')
3551 lower
= read_huge_number (pp
, ';', &nbits
, 0);
3554 return error_type (pp
, objfile
);
3556 if (!(**pp
>= '0' && **pp
<= '9') && **pp
!= '-')
3561 upper
= read_huge_number (pp
, ';', &nbits
, 0);
3563 return error_type (pp
, objfile
);
3565 element_type
= read_type (pp
, objfile
);
3574 create_static_range_type (NULL
, index_type
, lower
, upper
);
3575 type
= create_array_type (type
, element_type
, range_type
);
3581 /* Read a definition of an enumeration type,
3582 and create and return a suitable type object.
3583 Also defines the symbols that represent the values of the type. */
3585 static struct type
*
3586 read_enum_type (const char **pp
, struct type
*type
,
3587 struct objfile
*objfile
)
3589 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
3595 struct pending
**symlist
;
3596 struct pending
*osyms
, *syms
;
3599 int unsigned_enum
= 1;
3602 /* FIXME! The stabs produced by Sun CC merrily define things that ought
3603 to be file-scope, between N_FN entries, using N_LSYM. What's a mother
3604 to do? For now, force all enum values to file scope. */
3605 if (within_function
)
3606 symlist
= get_local_symbols ();
3609 symlist
= get_file_symbols ();
3611 o_nsyms
= osyms
? osyms
->nsyms
: 0;
3613 /* The aix4 compiler emits an extra field before the enum members;
3614 my guess is it's a type of some sort. Just ignore it. */
3617 /* Skip over the type. */
3621 /* Skip over the colon. */
3625 /* Read the value-names and their values.
3626 The input syntax is NAME:VALUE,NAME:VALUE, and so on.
3627 A semicolon or comma instead of a NAME means the end. */
3628 while (**pp
&& **pp
!= ';' && **pp
!= ',')
3630 STABS_CONTINUE (pp
, objfile
);
3634 name
= obstack_strndup (&objfile
->objfile_obstack
, *pp
, p
- *pp
);
3636 n
= read_huge_number (pp
, ',', &nbits
, 0);
3638 return error_type (pp
, objfile
);
3640 sym
= allocate_symbol (objfile
);
3641 SYMBOL_SET_LINKAGE_NAME (sym
, name
);
3642 SYMBOL_SET_LANGUAGE (sym
, get_current_subfile ()->language
,
3643 &objfile
->objfile_obstack
);
3644 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST
;
3645 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
3646 SYMBOL_VALUE (sym
) = n
;
3649 add_symbol_to_list (sym
, symlist
);
3654 (*pp
)++; /* Skip the semicolon. */
3656 /* Now fill in the fields of the type-structure. */
3658 TYPE_LENGTH (type
) = gdbarch_int_bit (gdbarch
) / HOST_CHAR_BIT
;
3659 set_length_in_type_chain (type
);
3660 TYPE_CODE (type
) = TYPE_CODE_ENUM
;
3661 TYPE_STUB (type
) = 0;
3663 TYPE_UNSIGNED (type
) = 1;
3664 TYPE_NFIELDS (type
) = nsyms
;
3665 TYPE_FIELDS (type
) = (struct field
*)
3666 TYPE_ALLOC (type
, sizeof (struct field
) * nsyms
);
3667 memset (TYPE_FIELDS (type
), 0, sizeof (struct field
) * nsyms
);
3669 /* Find the symbols for the values and put them into the type.
3670 The symbols can be found in the symlist that we put them on
3671 to cause them to be defined. osyms contains the old value
3672 of that symlist; everything up to there was defined by us. */
3673 /* Note that we preserve the order of the enum constants, so
3674 that in something like "enum {FOO, LAST_THING=FOO}" we print
3675 FOO, not LAST_THING. */
3677 for (syms
= *symlist
, n
= nsyms
- 1; syms
; syms
= syms
->next
)
3679 int last
= syms
== osyms
? o_nsyms
: 0;
3680 int j
= syms
->nsyms
;
3682 for (; --j
>= last
; --n
)
3684 struct symbol
*xsym
= syms
->symbol
[j
];
3686 SYMBOL_TYPE (xsym
) = type
;
3687 TYPE_FIELD_NAME (type
, n
) = xsym
->linkage_name ();
3688 SET_FIELD_ENUMVAL (TYPE_FIELD (type
, n
), SYMBOL_VALUE (xsym
));
3689 TYPE_FIELD_BITSIZE (type
, n
) = 0;
3698 /* Sun's ACC uses a somewhat saner method for specifying the builtin
3699 typedefs in every file (for int, long, etc):
3701 type = b <signed> <width> <format type>; <offset>; <nbits>
3703 optional format type = c or b for char or boolean.
3704 offset = offset from high order bit to start bit of type.
3705 width is # bytes in object of this type, nbits is # bits in type.
3707 The width/offset stuff appears to be for small objects stored in
3708 larger ones (e.g. `shorts' in `int' registers). We ignore it for now,
3711 static struct type
*
3712 read_sun_builtin_type (const char **pp
, int typenums
[2], struct objfile
*objfile
)
3717 int boolean_type
= 0;
3728 return error_type (pp
, objfile
);
3732 /* For some odd reason, all forms of char put a c here. This is strange
3733 because no other type has this honor. We can safely ignore this because
3734 we actually determine 'char'acterness by the number of bits specified in
3736 Boolean forms, e.g Fortran logical*X, put a b here. */
3740 else if (**pp
== 'b')
3746 /* The first number appears to be the number of bytes occupied
3747 by this type, except that unsigned short is 4 instead of 2.
3748 Since this information is redundant with the third number,
3749 we will ignore it. */
3750 read_huge_number (pp
, ';', &nbits
, 0);
3752 return error_type (pp
, objfile
);
3754 /* The second number is always 0, so ignore it too. */
3755 read_huge_number (pp
, ';', &nbits
, 0);
3757 return error_type (pp
, objfile
);
3759 /* The third number is the number of bits for this type. */
3760 type_bits
= read_huge_number (pp
, 0, &nbits
, 0);
3762 return error_type (pp
, objfile
);
3763 /* The type *should* end with a semicolon. If it are embedded
3764 in a larger type the semicolon may be the only way to know where
3765 the type ends. If this type is at the end of the stabstring we
3766 can deal with the omitted semicolon (but we don't have to like
3767 it). Don't bother to complain(), Sun's compiler omits the semicolon
3774 struct type
*type
= init_type (objfile
, TYPE_CODE_VOID
,
3775 TARGET_CHAR_BIT
, NULL
);
3777 TYPE_UNSIGNED (type
) = 1;
3782 return init_boolean_type (objfile
, type_bits
, unsigned_type
, NULL
);
3784 return init_integer_type (objfile
, type_bits
, unsigned_type
, NULL
);
3787 static struct type
*
3788 read_sun_floating_type (const char **pp
, int typenums
[2],
3789 struct objfile
*objfile
)
3794 struct type
*rettype
;
3796 /* The first number has more details about the type, for example
3798 details
= read_huge_number (pp
, ';', &nbits
, 0);
3800 return error_type (pp
, objfile
);
3802 /* The second number is the number of bytes occupied by this type. */
3803 nbytes
= read_huge_number (pp
, ';', &nbits
, 0);
3805 return error_type (pp
, objfile
);
3807 nbits
= nbytes
* TARGET_CHAR_BIT
;
3809 if (details
== NF_COMPLEX
|| details
== NF_COMPLEX16
3810 || details
== NF_COMPLEX32
)
3812 rettype
= dbx_init_float_type (objfile
, nbits
/ 2);
3813 return init_complex_type (objfile
, NULL
, rettype
);
3816 return dbx_init_float_type (objfile
, nbits
);
3819 /* Read a number from the string pointed to by *PP.
3820 The value of *PP is advanced over the number.
3821 If END is nonzero, the character that ends the
3822 number must match END, or an error happens;
3823 and that character is skipped if it does match.
3824 If END is zero, *PP is left pointing to that character.
3826 If TWOS_COMPLEMENT_BITS is set to a strictly positive value and if
3827 the number is represented in an octal representation, assume that
3828 it is represented in a 2's complement representation with a size of
3829 TWOS_COMPLEMENT_BITS.
3831 If the number fits in a long, set *BITS to 0 and return the value.
3832 If not, set *BITS to be the number of bits in the number and return 0.
3834 If encounter garbage, set *BITS to -1 and return 0. */
3837 read_huge_number (const char **pp
, int end
, int *bits
,
3838 int twos_complement_bits
)
3840 const char *p
= *pp
;
3849 int twos_complement_representation
= 0;
3857 /* Leading zero means octal. GCC uses this to output values larger
3858 than an int (because that would be hard in decimal). */
3865 /* Skip extra zeros. */
3869 if (sign
> 0 && radix
== 8 && twos_complement_bits
> 0)
3871 /* Octal, possibly signed. Check if we have enough chars for a
3877 while ((c
= *p1
) >= '0' && c
< '8')
3881 if (len
> twos_complement_bits
/ 3
3882 || (twos_complement_bits
% 3 == 0
3883 && len
== twos_complement_bits
/ 3))
3885 /* Ok, we have enough characters for a signed value, check
3886 for signedness by testing if the sign bit is set. */
3887 sign_bit
= (twos_complement_bits
% 3 + 2) % 3;
3889 if (c
& (1 << sign_bit
))
3891 /* Definitely signed. */
3892 twos_complement_representation
= 1;
3898 upper_limit
= LONG_MAX
/ radix
;
3900 while ((c
= *p
++) >= '0' && c
< ('0' + radix
))
3902 if (n
<= upper_limit
)
3904 if (twos_complement_representation
)
3906 /* Octal, signed, twos complement representation. In
3907 this case, n is the corresponding absolute value. */
3910 long sn
= c
- '0' - ((2 * (c
- '0')) | (2 << sign_bit
));
3922 /* unsigned representation */
3924 n
+= c
- '0'; /* FIXME this overflows anyway. */
3930 /* This depends on large values being output in octal, which is
3937 /* Ignore leading zeroes. */
3941 else if (c
== '2' || c
== '3')
3962 if (radix
== 8 && twos_complement_bits
> 0 && nbits
> twos_complement_bits
)
3964 /* We were supposed to parse a number with maximum
3965 TWOS_COMPLEMENT_BITS bits, but something went wrong. */
3976 /* Large decimal constants are an error (because it is hard to
3977 count how many bits are in them). */
3983 /* -0x7f is the same as 0x80. So deal with it by adding one to
3984 the number of bits. Two's complement represention octals
3985 can't have a '-' in front. */
3986 if (sign
== -1 && !twos_complement_representation
)
3997 /* It's *BITS which has the interesting information. */
4001 static struct type
*
4002 read_range_type (const char **pp
, int typenums
[2], int type_size
,
4003 struct objfile
*objfile
)
4005 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
4006 const char *orig_pp
= *pp
;
4011 struct type
*result_type
;
4012 struct type
*index_type
= NULL
;
4014 /* First comes a type we are a subrange of.
4015 In C it is usually 0, 1 or the type being defined. */
4016 if (read_type_number (pp
, rangenums
) != 0)
4017 return error_type (pp
, objfile
);
4018 self_subrange
= (rangenums
[0] == typenums
[0] &&
4019 rangenums
[1] == typenums
[1]);
4024 index_type
= read_type (pp
, objfile
);
4027 /* A semicolon should now follow; skip it. */
4031 /* The remaining two operands are usually lower and upper bounds
4032 of the range. But in some special cases they mean something else. */
4033 n2
= read_huge_number (pp
, ';', &n2bits
, type_size
);
4034 n3
= read_huge_number (pp
, ';', &n3bits
, type_size
);
4036 if (n2bits
== -1 || n3bits
== -1)
4037 return error_type (pp
, objfile
);
4040 goto handle_true_range
;
4042 /* If limits are huge, must be large integral type. */
4043 if (n2bits
!= 0 || n3bits
!= 0)
4045 char got_signed
= 0;
4046 char got_unsigned
= 0;
4047 /* Number of bits in the type. */
4050 /* If a type size attribute has been specified, the bounds of
4051 the range should fit in this size. If the lower bounds needs
4052 more bits than the upper bound, then the type is signed. */
4053 if (n2bits
<= type_size
&& n3bits
<= type_size
)
4055 if (n2bits
== type_size
&& n2bits
> n3bits
)
4061 /* Range from 0 to <large number> is an unsigned large integral type. */
4062 else if ((n2bits
== 0 && n2
== 0) && n3bits
!= 0)
4067 /* Range from <large number> to <large number>-1 is a large signed
4068 integral type. Take care of the case where <large number> doesn't
4069 fit in a long but <large number>-1 does. */
4070 else if ((n2bits
!= 0 && n3bits
!= 0 && n2bits
== n3bits
+ 1)
4071 || (n2bits
!= 0 && n3bits
== 0
4072 && (n2bits
== sizeof (long) * HOST_CHAR_BIT
)
4079 if (got_signed
|| got_unsigned
)
4080 return init_integer_type (objfile
, nbits
, got_unsigned
, NULL
);
4082 return error_type (pp
, objfile
);
4085 /* A type defined as a subrange of itself, with bounds both 0, is void. */
4086 if (self_subrange
&& n2
== 0 && n3
== 0)
4087 return init_type (objfile
, TYPE_CODE_VOID
, TARGET_CHAR_BIT
, NULL
);
4089 /* If n3 is zero and n2 is positive, we want a floating type, and n2
4090 is the width in bytes.
4092 Fortran programs appear to use this for complex types also. To
4093 distinguish between floats and complex, g77 (and others?) seem
4094 to use self-subranges for the complexes, and subranges of int for
4097 Also note that for complexes, g77 sets n2 to the size of one of
4098 the member floats, not the whole complex beast. My guess is that
4099 this was to work well with pre-COMPLEX versions of gdb. */
4101 if (n3
== 0 && n2
> 0)
4103 struct type
*float_type
4104 = dbx_init_float_type (objfile
, n2
* TARGET_CHAR_BIT
);
4107 return init_complex_type (objfile
, NULL
, float_type
);
4112 /* If the upper bound is -1, it must really be an unsigned integral. */
4114 else if (n2
== 0 && n3
== -1)
4116 int bits
= type_size
;
4120 /* We don't know its size. It is unsigned int or unsigned
4121 long. GCC 2.3.3 uses this for long long too, but that is
4122 just a GDB 3.5 compatibility hack. */
4123 bits
= gdbarch_int_bit (gdbarch
);
4126 return init_integer_type (objfile
, bits
, 1, NULL
);
4129 /* Special case: char is defined (Who knows why) as a subrange of
4130 itself with range 0-127. */
4131 else if (self_subrange
&& n2
== 0 && n3
== 127)
4133 struct type
*type
= init_integer_type (objfile
, TARGET_CHAR_BIT
,
4135 TYPE_NOSIGN (type
) = 1;
4138 /* We used to do this only for subrange of self or subrange of int. */
4141 /* -1 is used for the upper bound of (4 byte) "unsigned int" and
4142 "unsigned long", and we already checked for that,
4143 so don't need to test for it here. */
4146 /* n3 actually gives the size. */
4147 return init_integer_type (objfile
, -n3
* TARGET_CHAR_BIT
, 1, NULL
);
4149 /* Is n3 == 2**(8n)-1 for some integer n? Then it's an
4150 unsigned n-byte integer. But do require n to be a power of
4151 two; we don't want 3- and 5-byte integers flying around. */
4157 for (bytes
= 0; (bits
& 0xff) == 0xff; bytes
++)
4160 && ((bytes
- 1) & bytes
) == 0) /* "bytes is a power of two" */
4161 return init_integer_type (objfile
, bytes
* TARGET_CHAR_BIT
, 1, NULL
);
4164 /* I think this is for Convex "long long". Since I don't know whether
4165 Convex sets self_subrange, I also accept that particular size regardless
4166 of self_subrange. */
4167 else if (n3
== 0 && n2
< 0
4169 || n2
== -gdbarch_long_long_bit
4170 (gdbarch
) / TARGET_CHAR_BIT
))
4171 return init_integer_type (objfile
, -n2
* TARGET_CHAR_BIT
, 0, NULL
);
4172 else if (n2
== -n3
- 1)
4175 return init_integer_type (objfile
, 8, 0, NULL
);
4177 return init_integer_type (objfile
, 16, 0, NULL
);
4178 if (n3
== 0x7fffffff)
4179 return init_integer_type (objfile
, 32, 0, NULL
);
4182 /* We have a real range type on our hands. Allocate space and
4183 return a real pointer. */
4187 index_type
= objfile_type (objfile
)->builtin_int
;
4189 index_type
= *dbx_lookup_type (rangenums
, objfile
);
4190 if (index_type
== NULL
)
4192 /* Does this actually ever happen? Is that why we are worrying
4193 about dealing with it rather than just calling error_type? */
4195 complaint (_("base type %d of range type is not defined"), rangenums
[1]);
4197 index_type
= objfile_type (objfile
)->builtin_int
;
4201 = create_static_range_type (NULL
, index_type
, n2
, n3
);
4202 return (result_type
);
4205 /* Read in an argument list. This is a list of types, separated by commas
4206 and terminated with END. Return the list of types read in, or NULL
4207 if there is an error. */
4209 static struct field
*
4210 read_args (const char **pp
, int end
, struct objfile
*objfile
, int *nargsp
,
4213 /* FIXME! Remove this arbitrary limit! */
4214 struct type
*types
[1024]; /* Allow for fns of 1023 parameters. */
4221 /* Invalid argument list: no ','. */
4224 STABS_CONTINUE (pp
, objfile
);
4225 types
[n
++] = read_type (pp
, objfile
);
4227 (*pp
)++; /* get past `end' (the ':' character). */
4231 /* We should read at least the THIS parameter here. Some broken stabs
4232 output contained `(0,41),(0,42)=@s8;-16;,(0,43),(0,1);' where should
4233 have been present ";-16,(0,43)" reference instead. This way the
4234 excessive ";" marker prematurely stops the parameters parsing. */
4236 complaint (_("Invalid (empty) method arguments"));
4239 else if (TYPE_CODE (types
[n
- 1]) != TYPE_CODE_VOID
)
4247 rval
= XCNEWVEC (struct field
, n
);
4248 for (i
= 0; i
< n
; i
++)
4249 rval
[i
].type
= types
[i
];
4254 /* Common block handling. */
4256 /* List of symbols declared since the last BCOMM. This list is a tail
4257 of local_symbols. When ECOMM is seen, the symbols on the list
4258 are noted so their proper addresses can be filled in later,
4259 using the common block base address gotten from the assembler
4262 static struct pending
*common_block
;
4263 static int common_block_i
;
4265 /* Name of the current common block. We get it from the BCOMM instead of the
4266 ECOMM to match IBM documentation (even though IBM puts the name both places
4267 like everyone else). */
4268 static char *common_block_name
;
4270 /* Process a N_BCOMM symbol. The storage for NAME is not guaranteed
4271 to remain after this function returns. */
4274 common_block_start (const char *name
, struct objfile
*objfile
)
4276 if (common_block_name
!= NULL
)
4278 complaint (_("Invalid symbol data: common block within common block"));
4280 common_block
= *get_local_symbols ();
4281 common_block_i
= common_block
? common_block
->nsyms
: 0;
4282 common_block_name
= obstack_strdup (&objfile
->objfile_obstack
, name
);
4285 /* Process a N_ECOMM symbol. */
4288 common_block_end (struct objfile
*objfile
)
4290 /* Symbols declared since the BCOMM are to have the common block
4291 start address added in when we know it. common_block and
4292 common_block_i point to the first symbol after the BCOMM in
4293 the local_symbols list; copy the list and hang it off the
4294 symbol for the common block name for later fixup. */
4297 struct pending
*newobj
= 0;
4298 struct pending
*next
;
4301 if (common_block_name
== NULL
)
4303 complaint (_("ECOMM symbol unmatched by BCOMM"));
4307 sym
= allocate_symbol (objfile
);
4308 /* Note: common_block_name already saved on objfile_obstack. */
4309 SYMBOL_SET_LINKAGE_NAME (sym
, common_block_name
);
4310 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
4312 /* Now we copy all the symbols which have been defined since the BCOMM. */
4314 /* Copy all the struct pendings before common_block. */
4315 for (next
= *get_local_symbols ();
4316 next
!= NULL
&& next
!= common_block
;
4319 for (j
= 0; j
< next
->nsyms
; j
++)
4320 add_symbol_to_list (next
->symbol
[j
], &newobj
);
4323 /* Copy however much of COMMON_BLOCK we need. If COMMON_BLOCK is
4324 NULL, it means copy all the local symbols (which we already did
4327 if (common_block
!= NULL
)
4328 for (j
= common_block_i
; j
< common_block
->nsyms
; j
++)
4329 add_symbol_to_list (common_block
->symbol
[j
], &newobj
);
4331 SYMBOL_TYPE (sym
) = (struct type
*) newobj
;
4333 /* Should we be putting local_symbols back to what it was?
4336 i
= hashname (sym
->linkage_name ());
4337 SYMBOL_VALUE_CHAIN (sym
) = global_sym_chain
[i
];
4338 global_sym_chain
[i
] = sym
;
4339 common_block_name
= NULL
;
4342 /* Add a common block's start address to the offset of each symbol
4343 declared to be in it (by being between a BCOMM/ECOMM pair that uses
4344 the common block name). */
4347 fix_common_block (struct symbol
*sym
, CORE_ADDR valu
)
4349 struct pending
*next
= (struct pending
*) SYMBOL_TYPE (sym
);
4351 for (; next
; next
= next
->next
)
4355 for (j
= next
->nsyms
- 1; j
>= 0; j
--)
4356 SET_SYMBOL_VALUE_ADDRESS (next
->symbol
[j
],
4357 SYMBOL_VALUE_ADDRESS (next
->symbol
[j
])
4364 /* Add {TYPE, TYPENUMS} to the NONAME_UNDEFS vector.
4365 See add_undefined_type for more details. */
4368 add_undefined_type_noname (struct type
*type
, int typenums
[2])
4372 nat
.typenums
[0] = typenums
[0];
4373 nat
.typenums
[1] = typenums
[1];
4376 if (noname_undefs_length
== noname_undefs_allocated
)
4378 noname_undefs_allocated
*= 2;
4379 noname_undefs
= (struct nat
*)
4380 xrealloc ((char *) noname_undefs
,
4381 noname_undefs_allocated
* sizeof (struct nat
));
4383 noname_undefs
[noname_undefs_length
++] = nat
;
4386 /* Add TYPE to the UNDEF_TYPES vector.
4387 See add_undefined_type for more details. */
4390 add_undefined_type_1 (struct type
*type
)
4392 if (undef_types_length
== undef_types_allocated
)
4394 undef_types_allocated
*= 2;
4395 undef_types
= (struct type
**)
4396 xrealloc ((char *) undef_types
,
4397 undef_types_allocated
* sizeof (struct type
*));
4399 undef_types
[undef_types_length
++] = type
;
4402 /* What about types defined as forward references inside of a small lexical
4404 /* Add a type to the list of undefined types to be checked through
4405 once this file has been read in.
4407 In practice, we actually maintain two such lists: The first list
4408 (UNDEF_TYPES) is used for types whose name has been provided, and
4409 concerns forward references (eg 'xs' or 'xu' forward references);
4410 the second list (NONAME_UNDEFS) is used for types whose name is
4411 unknown at creation time, because they were referenced through
4412 their type number before the actual type was declared.
4413 This function actually adds the given type to the proper list. */
4416 add_undefined_type (struct type
*type
, int typenums
[2])
4418 if (TYPE_NAME (type
) == NULL
)
4419 add_undefined_type_noname (type
, typenums
);
4421 add_undefined_type_1 (type
);
4424 /* Try to fix all undefined types pushed on the UNDEF_TYPES vector. */
4427 cleanup_undefined_types_noname (struct objfile
*objfile
)
4431 for (i
= 0; i
< noname_undefs_length
; i
++)
4433 struct nat nat
= noname_undefs
[i
];
4436 type
= dbx_lookup_type (nat
.typenums
, objfile
);
4437 if (nat
.type
!= *type
&& TYPE_CODE (*type
) != TYPE_CODE_UNDEF
)
4439 /* The instance flags of the undefined type are still unset,
4440 and needs to be copied over from the reference type.
4441 Since replace_type expects them to be identical, we need
4442 to set these flags manually before hand. */
4443 TYPE_INSTANCE_FLAGS (nat
.type
) = TYPE_INSTANCE_FLAGS (*type
);
4444 replace_type (nat
.type
, *type
);
4448 noname_undefs_length
= 0;
4451 /* Go through each undefined type, see if it's still undefined, and fix it
4452 up if possible. We have two kinds of undefined types:
4454 TYPE_CODE_ARRAY: Array whose target type wasn't defined yet.
4455 Fix: update array length using the element bounds
4456 and the target type's length.
4457 TYPE_CODE_STRUCT, TYPE_CODE_UNION: Structure whose fields were not
4458 yet defined at the time a pointer to it was made.
4459 Fix: Do a full lookup on the struct/union tag. */
4462 cleanup_undefined_types_1 (void)
4466 /* Iterate over every undefined type, and look for a symbol whose type
4467 matches our undefined type. The symbol matches if:
4468 1. It is a typedef in the STRUCT domain;
4469 2. It has the same name, and same type code;
4470 3. The instance flags are identical.
4472 It is important to check the instance flags, because we have seen
4473 examples where the debug info contained definitions such as:
4475 "foo_t:t30=B31=xefoo_t:"
4477 In this case, we have created an undefined type named "foo_t" whose
4478 instance flags is null (when processing "xefoo_t"), and then created
4479 another type with the same name, but with different instance flags
4480 ('B' means volatile). I think that the definition above is wrong,
4481 since the same type cannot be volatile and non-volatile at the same
4482 time, but we need to be able to cope with it when it happens. The
4483 approach taken here is to treat these two types as different. */
4485 for (type
= undef_types
; type
< undef_types
+ undef_types_length
; type
++)
4487 switch (TYPE_CODE (*type
))
4490 case TYPE_CODE_STRUCT
:
4491 case TYPE_CODE_UNION
:
4492 case TYPE_CODE_ENUM
:
4494 /* Check if it has been defined since. Need to do this here
4495 as well as in check_typedef to deal with the (legitimate in
4496 C though not C++) case of several types with the same name
4497 in different source files. */
4498 if (TYPE_STUB (*type
))
4500 struct pending
*ppt
;
4502 /* Name of the type, without "struct" or "union". */
4503 const char *type_name
= TYPE_NAME (*type
);
4505 if (type_name
== NULL
)
4507 complaint (_("need a type name"));
4510 for (ppt
= *get_file_symbols (); ppt
; ppt
= ppt
->next
)
4512 for (i
= 0; i
< ppt
->nsyms
; i
++)
4514 struct symbol
*sym
= ppt
->symbol
[i
];
4516 if (SYMBOL_CLASS (sym
) == LOC_TYPEDEF
4517 && SYMBOL_DOMAIN (sym
) == STRUCT_DOMAIN
4518 && (TYPE_CODE (SYMBOL_TYPE (sym
)) ==
4520 && (TYPE_INSTANCE_FLAGS (*type
) ==
4521 TYPE_INSTANCE_FLAGS (SYMBOL_TYPE (sym
)))
4522 && strcmp (sym
->linkage_name (), type_name
) == 0)
4523 replace_type (*type
, SYMBOL_TYPE (sym
));
4532 complaint (_("forward-referenced types left unresolved, "
4540 undef_types_length
= 0;
4543 /* Try to fix all the undefined types we encountered while processing
4547 cleanup_undefined_stabs_types (struct objfile
*objfile
)
4549 cleanup_undefined_types_1 ();
4550 cleanup_undefined_types_noname (objfile
);
4553 /* See stabsread.h. */
4556 scan_file_globals (struct objfile
*objfile
)
4559 struct symbol
*sym
, *prev
;
4560 struct objfile
*resolve_objfile
;
4562 /* SVR4 based linkers copy referenced global symbols from shared
4563 libraries to the main executable.
4564 If we are scanning the symbols for a shared library, try to resolve
4565 them from the minimal symbols of the main executable first. */
4567 if (symfile_objfile
&& objfile
!= symfile_objfile
)
4568 resolve_objfile
= symfile_objfile
;
4570 resolve_objfile
= objfile
;
4574 /* Avoid expensive loop through all minimal symbols if there are
4575 no unresolved symbols. */
4576 for (hash
= 0; hash
< HASHSIZE
; hash
++)
4578 if (global_sym_chain
[hash
])
4581 if (hash
>= HASHSIZE
)
4584 for (minimal_symbol
*msymbol
: resolve_objfile
->msymbols ())
4588 /* Skip static symbols. */
4589 switch (MSYMBOL_TYPE (msymbol
))
4601 /* Get the hash index and check all the symbols
4602 under that hash index. */
4604 hash
= hashname (msymbol
->linkage_name ());
4606 for (sym
= global_sym_chain
[hash
]; sym
;)
4608 if (strcmp (msymbol
->linkage_name (), sym
->linkage_name ()) == 0)
4610 /* Splice this symbol out of the hash chain and
4611 assign the value we have to it. */
4614 SYMBOL_VALUE_CHAIN (prev
) = SYMBOL_VALUE_CHAIN (sym
);
4618 global_sym_chain
[hash
] = SYMBOL_VALUE_CHAIN (sym
);
4621 /* Check to see whether we need to fix up a common block. */
4622 /* Note: this code might be executed several times for
4623 the same symbol if there are multiple references. */
4626 if (SYMBOL_CLASS (sym
) == LOC_BLOCK
)
4628 fix_common_block (sym
,
4629 MSYMBOL_VALUE_ADDRESS (resolve_objfile
,
4634 SET_SYMBOL_VALUE_ADDRESS
4635 (sym
, MSYMBOL_VALUE_ADDRESS (resolve_objfile
,
4638 SYMBOL_SECTION (sym
) = MSYMBOL_SECTION (msymbol
);
4643 sym
= SYMBOL_VALUE_CHAIN (prev
);
4647 sym
= global_sym_chain
[hash
];
4653 sym
= SYMBOL_VALUE_CHAIN (sym
);
4657 if (resolve_objfile
== objfile
)
4659 resolve_objfile
= objfile
;
4662 /* Change the storage class of any remaining unresolved globals to
4663 LOC_UNRESOLVED and remove them from the chain. */
4664 for (hash
= 0; hash
< HASHSIZE
; hash
++)
4666 sym
= global_sym_chain
[hash
];
4670 sym
= SYMBOL_VALUE_CHAIN (sym
);
4672 /* Change the symbol address from the misleading chain value
4674 SET_SYMBOL_VALUE_ADDRESS (prev
, 0);
4676 /* Complain about unresolved common block symbols. */
4677 if (SYMBOL_CLASS (prev
) == LOC_STATIC
)
4678 SYMBOL_ACLASS_INDEX (prev
) = LOC_UNRESOLVED
;
4680 complaint (_("%s: common block `%s' from "
4681 "global_sym_chain unresolved"),
4682 objfile_name (objfile
), prev
->print_name ());
4685 memset (global_sym_chain
, 0, sizeof (global_sym_chain
));
4688 /* Initialize anything that needs initializing when starting to read
4689 a fresh piece of a symbol file, e.g. reading in the stuff corresponding
4693 stabsread_init (void)
4697 /* Initialize anything that needs initializing when a completely new
4698 symbol file is specified (not just adding some symbols from another
4699 file, e.g. a shared library). */
4702 stabsread_new_init (void)
4704 /* Empty the hash table of global syms looking for values. */
4705 memset (global_sym_chain
, 0, sizeof (global_sym_chain
));
4708 /* Initialize anything that needs initializing at the same time as
4709 start_symtab() is called. */
4714 global_stabs
= NULL
; /* AIX COFF */
4715 /* Leave FILENUM of 0 free for builtin types and this file's types. */
4716 n_this_object_header_files
= 1;
4717 type_vector_length
= 0;
4718 type_vector
= (struct type
**) 0;
4719 within_function
= 0;
4721 /* FIXME: If common_block_name is not already NULL, we should complain(). */
4722 common_block_name
= NULL
;
4725 /* Call after end_symtab(). */
4732 xfree (type_vector
);
4735 type_vector_length
= 0;
4736 previous_stab_code
= 0;
4740 finish_global_stabs (struct objfile
*objfile
)
4744 patch_block_stabs (*get_global_symbols (), global_stabs
, objfile
);
4745 xfree (global_stabs
);
4746 global_stabs
= NULL
;
4750 /* Find the end of the name, delimited by a ':', but don't match
4751 ObjC symbols which look like -[Foo bar::]:bla. */
4753 find_name_end (const char *name
)
4755 const char *s
= name
;
4757 if (s
[0] == '-' || *s
== '+')
4759 /* Must be an ObjC method symbol. */
4762 error (_("invalid symbol name \"%s\""), name
);
4764 s
= strchr (s
, ']');
4767 error (_("invalid symbol name \"%s\""), name
);
4769 return strchr (s
, ':');
4773 return strchr (s
, ':');
4777 /* See stabsread.h. */
4780 hashname (const char *name
)
4782 return hash (name
, strlen (name
)) % HASHSIZE
;
4785 /* Initializer for this module. */
4788 _initialize_stabsread (void)
4790 undef_types_allocated
= 20;
4791 undef_types_length
= 0;
4792 undef_types
= XNEWVEC (struct type
*, undef_types_allocated
);
4794 noname_undefs_allocated
= 20;
4795 noname_undefs_length
= 0;
4796 noname_undefs
= XNEWVEC (struct nat
, noname_undefs_allocated
);
4798 stab_register_index
= register_symbol_register_impl (LOC_REGISTER
,
4799 &stab_register_funcs
);
4800 stab_regparm_index
= register_symbol_register_impl (LOC_REGPARM_ADDR
,
4801 &stab_register_funcs
);