1 /* Support routines for decoding "stabs" debugging information format.
3 Copyright (C) 1986-2020 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
= objfile
->arch ();
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
= new (&objfile
->objfile_obstack
) symbol
;
427 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
428 SYMBOL_ACLASS_INDEX (sym
) = LOC_OPTIMIZED_OUT
;
429 sym
->set_linkage_name
430 (obstack_strndup (&objfile
->objfile_obstack
, name
, pp
- name
));
432 if (*(pp
- 1) == 'F' || *(pp
- 1) == 'f')
434 /* I don't think the linker does this with functions,
435 so as far as I know this is never executed.
436 But it doesn't hurt to check. */
438 lookup_function_type (read_type (&pp
, objfile
));
442 SYMBOL_TYPE (sym
) = read_type (&pp
, objfile
);
444 add_symbol_to_list (sym
, get_global_symbols ());
449 if (*(pp
- 1) == 'F' || *(pp
- 1) == 'f')
452 lookup_function_type (read_type (&pp
, objfile
));
456 SYMBOL_TYPE (sym
) = read_type (&pp
, objfile
);
464 /* Read a number by which a type is referred to in dbx data,
465 or perhaps read a pair (FILENUM, TYPENUM) in parentheses.
466 Just a single number N is equivalent to (0,N).
467 Return the two numbers by storing them in the vector TYPENUMS.
468 TYPENUMS will then be used as an argument to dbx_lookup_type.
470 Returns 0 for success, -1 for error. */
473 read_type_number (const char **pp
, int *typenums
)
480 typenums
[0] = read_huge_number (pp
, ',', &nbits
, 0);
483 typenums
[1] = read_huge_number (pp
, ')', &nbits
, 0);
490 typenums
[1] = read_huge_number (pp
, 0, &nbits
, 0);
498 #define VISIBILITY_PRIVATE '0' /* Stabs character for private field */
499 #define VISIBILITY_PROTECTED '1' /* Stabs character for protected fld */
500 #define VISIBILITY_PUBLIC '2' /* Stabs character for public field */
501 #define VISIBILITY_IGNORE '9' /* Optimized out or zero length */
503 /* Structure for storing pointers to reference definitions for fast lookup
504 during "process_later". */
513 #define MAX_CHUNK_REFS 100
514 #define REF_CHUNK_SIZE (MAX_CHUNK_REFS * sizeof (struct ref_map))
515 #define REF_MAP_SIZE(ref_chunk) ((ref_chunk) * REF_CHUNK_SIZE)
517 static struct ref_map
*ref_map
;
519 /* Ptr to free cell in chunk's linked list. */
520 static int ref_count
= 0;
522 /* Number of chunks malloced. */
523 static int ref_chunk
= 0;
525 /* This file maintains a cache of stabs aliases found in the symbol
526 table. If the symbol table changes, this cache must be cleared
527 or we are left holding onto data in invalid obstacks. */
529 stabsread_clear_cache (void)
535 /* Create array of pointers mapping refids to symbols and stab strings.
536 Add pointers to reference definition symbols and/or their values as we
537 find them, using their reference numbers as our index.
538 These will be used later when we resolve references. */
540 ref_add (int refnum
, struct symbol
*sym
, const char *stabs
, CORE_ADDR value
)
544 if (refnum
>= ref_count
)
545 ref_count
= refnum
+ 1;
546 if (ref_count
> ref_chunk
* MAX_CHUNK_REFS
)
548 int new_slots
= ref_count
- ref_chunk
* MAX_CHUNK_REFS
;
549 int new_chunks
= new_slots
/ MAX_CHUNK_REFS
+ 1;
551 ref_map
= (struct ref_map
*)
552 xrealloc (ref_map
, REF_MAP_SIZE (ref_chunk
+ new_chunks
));
553 memset (ref_map
+ ref_chunk
* MAX_CHUNK_REFS
, 0,
554 new_chunks
* REF_CHUNK_SIZE
);
555 ref_chunk
+= new_chunks
;
557 ref_map
[refnum
].stabs
= stabs
;
558 ref_map
[refnum
].sym
= sym
;
559 ref_map
[refnum
].value
= value
;
562 /* Return defined sym for the reference REFNUM. */
564 ref_search (int refnum
)
566 if (refnum
< 0 || refnum
> ref_count
)
568 return ref_map
[refnum
].sym
;
571 /* Parse a reference id in STRING and return the resulting
572 reference number. Move STRING beyond the reference id. */
575 process_reference (const char **string
)
583 /* Advance beyond the initial '#'. */
586 /* Read number as reference id. */
587 while (*p
&& isdigit (*p
))
589 refnum
= refnum
* 10 + *p
- '0';
596 /* If STRING defines a reference, store away a pointer to the reference
597 definition for later use. Return the reference number. */
600 symbol_reference_defined (const char **string
)
602 const char *p
= *string
;
605 refnum
= process_reference (&p
);
607 /* Defining symbols end in '='. */
610 /* Symbol is being defined here. */
616 /* Must be a reference. Either the symbol has already been defined,
617 or this is a forward reference to it. */
624 stab_reg_to_regnum (struct symbol
*sym
, struct gdbarch
*gdbarch
)
626 int regno
= gdbarch_stab_reg_to_regnum (gdbarch
, SYMBOL_VALUE (sym
));
628 if (regno
< 0 || regno
>= gdbarch_num_cooked_regs (gdbarch
))
630 reg_value_complaint (regno
, gdbarch_num_cooked_regs (gdbarch
),
633 regno
= gdbarch_sp_regnum (gdbarch
); /* Known safe, though useless. */
639 static const struct symbol_register_ops stab_register_funcs
= {
643 /* The "aclass" indices for computed symbols. */
645 static int stab_register_index
;
646 static int stab_regparm_index
;
649 define_symbol (CORE_ADDR valu
, const char *string
, int desc
, int type
,
650 struct objfile
*objfile
)
652 struct gdbarch
*gdbarch
= objfile
->arch ();
654 const char *p
= find_name_end (string
);
659 /* We would like to eliminate nameless symbols, but keep their types.
660 E.g. stab entry ":t10=*2" should produce a type 10, which is a pointer
661 to type 2, but, should not create a symbol to address that type. Since
662 the symbol will be nameless, there is no way any user can refer to it. */
666 /* Ignore syms with empty names. */
670 /* Ignore old-style symbols from cc -go. */
681 _("Bad stabs string '%s'"), string
);
686 /* If a nameless stab entry, all we need is the type, not the symbol.
687 e.g. ":t10=*2" or a nameless enum like " :T16=ered:0,green:1,blue:2,;" */
688 nameless
= (p
== string
|| ((string
[0] == ' ') && (string
[1] == ':')));
690 current_symbol
= sym
= new (&objfile
->objfile_obstack
) symbol
;
692 if (processing_gcc_compilation
)
694 /* GCC 2.x puts the line number in desc. SunOS apparently puts in the
695 number of bytes occupied by a type or object, which we ignore. */
696 SYMBOL_LINE (sym
) = desc
;
700 SYMBOL_LINE (sym
) = 0; /* unknown */
703 sym
->set_language (get_current_subfile ()->language
,
704 &objfile
->objfile_obstack
);
706 if (is_cplus_marker (string
[0]))
708 /* Special GNU C++ names. */
712 sym
->set_linkage_name ("this");
715 case 'v': /* $vtbl_ptr_type */
719 sym
->set_linkage_name ("eh_throw");
723 /* This was an anonymous type that was never fixed up. */
727 /* SunPRO (3.0 at least) static variable encoding. */
728 if (gdbarch_static_transform_name_p (gdbarch
))
733 complaint (_("Unknown C++ symbol name `%s'"),
735 goto normal
; /* Do *something* with it. */
741 gdb::unique_xmalloc_ptr
<char> new_name
;
743 if (sym
->language () == language_cplus
)
745 char *name
= (char *) alloca (p
- string
+ 1);
747 memcpy (name
, string
, p
- string
);
748 name
[p
- string
] = '\0';
749 new_name
= cp_canonicalize_string (name
);
751 if (new_name
!= nullptr)
752 sym
->compute_and_set_names (new_name
.get (), true, objfile
->per_bfd
);
754 sym
->compute_and_set_names (gdb::string_view (string
, p
- string
), true,
757 if (sym
->language () == language_cplus
)
758 cp_scan_for_anonymous_namespaces (get_buildsym_compunit (), sym
,
764 /* Determine the type of name being defined. */
766 /* Getting GDB to correctly skip the symbol on an undefined symbol
767 descriptor and not ever dump core is a very dodgy proposition if
768 we do things this way. I say the acorn RISC machine can just
769 fix their compiler. */
770 /* The Acorn RISC machine's compiler can put out locals that don't
771 start with "234=" or "(3,4)=", so assume anything other than the
772 deftypes we know how to handle is a local. */
773 if (!strchr ("cfFGpPrStTvVXCR", *p
))
775 if (isdigit (*p
) || *p
== '(' || *p
== '-')
784 /* c is a special case, not followed by a type-number.
785 SYMBOL:c=iVALUE for an integer constant symbol.
786 SYMBOL:c=rVALUE for a floating constant symbol.
787 SYMBOL:c=eTYPE,INTVALUE for an enum constant symbol.
788 e.g. "b:c=e6,0" for "const b = blob1"
789 (where type 6 is defined by "blobs:t6=eblob1:0,blob2:1,;"). */
792 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST
;
793 SYMBOL_TYPE (sym
) = error_type (&p
, objfile
);
794 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
795 add_symbol_to_list (sym
, get_file_symbols ());
804 struct type
*dbl_type
;
806 dbl_type
= objfile_type (objfile
)->builtin_double
;
808 = (gdb_byte
*) obstack_alloc (&objfile
->objfile_obstack
,
809 TYPE_LENGTH (dbl_type
));
811 target_float_from_string (dbl_valu
, dbl_type
, std::string (p
));
813 SYMBOL_TYPE (sym
) = dbl_type
;
814 SYMBOL_VALUE_BYTES (sym
) = dbl_valu
;
815 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST_BYTES
;
820 /* Defining integer constants this way is kind of silly,
821 since 'e' constants allows the compiler to give not
822 only the value, but the type as well. C has at least
823 int, long, unsigned int, and long long as constant
824 types; other languages probably should have at least
825 unsigned as well as signed constants. */
827 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->builtin_long
;
828 SYMBOL_VALUE (sym
) = atoi (p
);
829 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST
;
835 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->builtin_char
;
836 SYMBOL_VALUE (sym
) = atoi (p
);
837 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST
;
843 struct type
*range_type
;
846 gdb_byte
*string_local
= (gdb_byte
*) alloca (strlen (p
));
847 gdb_byte
*string_value
;
849 if (quote
!= '\'' && quote
!= '"')
851 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST
;
852 SYMBOL_TYPE (sym
) = error_type (&p
, objfile
);
853 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
854 add_symbol_to_list (sym
, get_file_symbols ());
858 /* Find matching quote, rejecting escaped quotes. */
859 while (*p
&& *p
!= quote
)
861 if (*p
== '\\' && p
[1] == quote
)
863 string_local
[ind
] = (gdb_byte
) quote
;
869 string_local
[ind
] = (gdb_byte
) (*p
);
876 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST
;
877 SYMBOL_TYPE (sym
) = error_type (&p
, objfile
);
878 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
879 add_symbol_to_list (sym
, get_file_symbols ());
883 /* NULL terminate the string. */
884 string_local
[ind
] = 0;
886 = create_static_range_type (NULL
,
887 objfile_type (objfile
)->builtin_int
,
889 SYMBOL_TYPE (sym
) = create_array_type (NULL
,
890 objfile_type (objfile
)->builtin_char
,
893 = (gdb_byte
*) obstack_alloc (&objfile
->objfile_obstack
, ind
+ 1);
894 memcpy (string_value
, string_local
, ind
+ 1);
897 SYMBOL_VALUE_BYTES (sym
) = string_value
;
898 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST_BYTES
;
903 /* SYMBOL:c=eTYPE,INTVALUE for a constant symbol whose value
904 can be represented as integral.
905 e.g. "b:c=e6,0" for "const b = blob1"
906 (where type 6 is defined by "blobs:t6=eblob1:0,blob2:1,;"). */
908 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST
;
909 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
913 SYMBOL_TYPE (sym
) = error_type (&p
, objfile
);
918 /* If the value is too big to fit in an int (perhaps because
919 it is unsigned), or something like that, we silently get
920 a bogus value. The type and everything else about it is
921 correct. Ideally, we should be using whatever we have
922 available for parsing unsigned and long long values,
924 SYMBOL_VALUE (sym
) = atoi (p
);
929 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST
;
930 SYMBOL_TYPE (sym
) = error_type (&p
, objfile
);
933 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
934 add_symbol_to_list (sym
, get_file_symbols ());
938 /* The name of a caught exception. */
939 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
940 SYMBOL_ACLASS_INDEX (sym
) = LOC_LABEL
;
941 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
942 SET_SYMBOL_VALUE_ADDRESS (sym
, valu
);
943 add_symbol_to_list (sym
, get_local_symbols ());
947 /* A static function definition. */
948 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
949 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
950 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
951 add_symbol_to_list (sym
, get_file_symbols ());
952 /* fall into process_function_types. */
954 process_function_types
:
955 /* Function result types are described as the result type in stabs.
956 We need to convert this to the function-returning-type-X type
957 in GDB. E.g. "int" is converted to "function returning int". */
958 if (SYMBOL_TYPE (sym
)->code () != TYPE_CODE_FUNC
)
959 SYMBOL_TYPE (sym
) = lookup_function_type (SYMBOL_TYPE (sym
));
961 /* All functions in C++ have prototypes. Stabs does not offer an
962 explicit way to identify prototyped or unprototyped functions,
963 but both GCC and Sun CC emit stabs for the "call-as" type rather
964 than the "declared-as" type for unprototyped functions, so
965 we treat all functions as if they were prototyped. This is used
966 primarily for promotion when calling the function from GDB. */
967 TYPE_PROTOTYPED (SYMBOL_TYPE (sym
)) = 1;
969 /* fall into process_prototype_types. */
971 process_prototype_types
:
972 /* Sun acc puts declared types of arguments here. */
975 struct type
*ftype
= SYMBOL_TYPE (sym
);
980 /* Obtain a worst case guess for the number of arguments
981 by counting the semicolons. */
988 /* Allocate parameter information fields and fill them in. */
991 TYPE_ALLOC (ftype
, nsemi
* sizeof (struct field
)));
996 /* A type number of zero indicates the start of varargs.
997 FIXME: GDB currently ignores vararg functions. */
998 if (p
[0] == '0' && p
[1] == '\0')
1000 ptype
= read_type (&p
, objfile
);
1002 /* The Sun compilers mark integer arguments, which should
1003 be promoted to the width of the calling conventions, with
1004 a type which references itself. This type is turned into
1005 a TYPE_CODE_VOID type by read_type, and we have to turn
1006 it back into builtin_int here.
1007 FIXME: Do we need a new builtin_promoted_int_arg ? */
1008 if (ptype
->code () == TYPE_CODE_VOID
)
1009 ptype
= objfile_type (objfile
)->builtin_int
;
1010 ftype
->field (nparams
).set_type (ptype
);
1011 TYPE_FIELD_ARTIFICIAL (ftype
, nparams
++) = 0;
1013 ftype
->set_num_fields (nparams
);
1014 TYPE_PROTOTYPED (ftype
) = 1;
1019 /* A global function definition. */
1020 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
1021 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
1022 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1023 add_symbol_to_list (sym
, get_global_symbols ());
1024 goto process_function_types
;
1027 /* For a class G (global) symbol, it appears that the
1028 value is not correct. It is necessary to search for the
1029 corresponding linker definition to find the value.
1030 These definitions appear at the end of the namelist. */
1031 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
1032 SYMBOL_ACLASS_INDEX (sym
) = LOC_STATIC
;
1033 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1034 /* Don't add symbol references to global_sym_chain.
1035 Symbol references don't have valid names and wont't match up with
1036 minimal symbols when the global_sym_chain is relocated.
1037 We'll fixup symbol references when we fixup the defining symbol. */
1038 if (sym
->linkage_name () && sym
->linkage_name ()[0] != '#')
1040 i
= hashname (sym
->linkage_name ());
1041 SYMBOL_VALUE_CHAIN (sym
) = global_sym_chain
[i
];
1042 global_sym_chain
[i
] = sym
;
1044 add_symbol_to_list (sym
, get_global_symbols ());
1047 /* This case is faked by a conditional above,
1048 when there is no code letter in the dbx data.
1049 Dbx data never actually contains 'l'. */
1052 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
1053 SYMBOL_ACLASS_INDEX (sym
) = LOC_LOCAL
;
1054 SYMBOL_VALUE (sym
) = valu
;
1055 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1056 add_symbol_to_list (sym
, get_local_symbols ());
1061 /* pF is a two-letter code that means a function parameter in Fortran.
1062 The type-number specifies the type of the return value.
1063 Translate it into a pointer-to-function type. */
1067 = lookup_pointer_type
1068 (lookup_function_type (read_type (&p
, objfile
)));
1071 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
1073 SYMBOL_ACLASS_INDEX (sym
) = LOC_ARG
;
1074 SYMBOL_VALUE (sym
) = valu
;
1075 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1076 SYMBOL_IS_ARGUMENT (sym
) = 1;
1077 add_symbol_to_list (sym
, get_local_symbols ());
1079 if (gdbarch_byte_order (gdbarch
) != BFD_ENDIAN_BIG
)
1081 /* On little-endian machines, this crud is never necessary,
1082 and, if the extra bytes contain garbage, is harmful. */
1086 /* If it's gcc-compiled, if it says `short', believe it. */
1087 if (processing_gcc_compilation
1088 || gdbarch_believe_pcc_promotion (gdbarch
))
1091 if (!gdbarch_believe_pcc_promotion (gdbarch
))
1093 /* If PCC says a parameter is a short or a char, it is
1095 if (TYPE_LENGTH (SYMBOL_TYPE (sym
))
1096 < gdbarch_int_bit (gdbarch
) / TARGET_CHAR_BIT
1097 && SYMBOL_TYPE (sym
)->code () == TYPE_CODE_INT
)
1100 TYPE_UNSIGNED (SYMBOL_TYPE (sym
))
1101 ? objfile_type (objfile
)->builtin_unsigned_int
1102 : objfile_type (objfile
)->builtin_int
;
1109 /* acc seems to use P to declare the prototypes of functions that
1110 are referenced by this file. gdb is not prepared to deal
1111 with this extra information. FIXME, it ought to. */
1114 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
1115 goto process_prototype_types
;
1120 /* Parameter which is in a register. */
1121 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
1122 SYMBOL_ACLASS_INDEX (sym
) = stab_register_index
;
1123 SYMBOL_IS_ARGUMENT (sym
) = 1;
1124 SYMBOL_VALUE (sym
) = valu
;
1125 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1126 add_symbol_to_list (sym
, get_local_symbols ());
1130 /* Register variable (either global or local). */
1131 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
1132 SYMBOL_ACLASS_INDEX (sym
) = stab_register_index
;
1133 SYMBOL_VALUE (sym
) = valu
;
1134 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1135 if (within_function
)
1137 /* Sun cc uses a pair of symbols, one 'p' and one 'r', with
1138 the same name to represent an argument passed in a
1139 register. GCC uses 'P' for the same case. So if we find
1140 such a symbol pair we combine it into one 'P' symbol.
1141 For Sun cc we need to do this regardless of stabs_argument_has_addr, because the compiler puts out
1142 the 'p' symbol even if it never saves the argument onto
1145 On most machines, we want to preserve both symbols, so
1146 that we can still get information about what is going on
1147 with the stack (VAX for computing args_printed, using
1148 stack slots instead of saved registers in backtraces,
1151 Note that this code illegally combines
1152 main(argc) struct foo argc; { register struct foo argc; }
1153 but this case is considered pathological and causes a warning
1154 from a decent compiler. */
1156 struct pending
*local_symbols
= *get_local_symbols ();
1158 && local_symbols
->nsyms
> 0
1159 && gdbarch_stabs_argument_has_addr (gdbarch
, SYMBOL_TYPE (sym
)))
1161 struct symbol
*prev_sym
;
1163 prev_sym
= local_symbols
->symbol
[local_symbols
->nsyms
- 1];
1164 if ((SYMBOL_CLASS (prev_sym
) == LOC_REF_ARG
1165 || SYMBOL_CLASS (prev_sym
) == LOC_ARG
)
1166 && strcmp (prev_sym
->linkage_name (),
1167 sym
->linkage_name ()) == 0)
1169 SYMBOL_ACLASS_INDEX (prev_sym
) = stab_register_index
;
1170 /* Use the type from the LOC_REGISTER; that is the type
1171 that is actually in that register. */
1172 SYMBOL_TYPE (prev_sym
) = SYMBOL_TYPE (sym
);
1173 SYMBOL_VALUE (prev_sym
) = SYMBOL_VALUE (sym
);
1178 add_symbol_to_list (sym
, get_local_symbols ());
1181 add_symbol_to_list (sym
, get_file_symbols ());
1185 /* Static symbol at top level of file. */
1186 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
1187 SYMBOL_ACLASS_INDEX (sym
) = LOC_STATIC
;
1188 SET_SYMBOL_VALUE_ADDRESS (sym
, valu
);
1189 if (gdbarch_static_transform_name_p (gdbarch
)
1190 && gdbarch_static_transform_name (gdbarch
, sym
->linkage_name ())
1191 != sym
->linkage_name ())
1193 struct bound_minimal_symbol msym
;
1195 msym
= lookup_minimal_symbol (sym
->linkage_name (), NULL
, objfile
);
1196 if (msym
.minsym
!= NULL
)
1198 const char *new_name
= gdbarch_static_transform_name
1199 (gdbarch
, sym
->linkage_name ());
1201 sym
->set_linkage_name (new_name
);
1202 SET_SYMBOL_VALUE_ADDRESS (sym
,
1203 BMSYMBOL_VALUE_ADDRESS (msym
));
1206 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1207 add_symbol_to_list (sym
, get_file_symbols ());
1211 /* In Ada, there is no distinction between typedef and non-typedef;
1212 any type declaration implicitly has the equivalent of a typedef,
1213 and thus 't' is in fact equivalent to 'Tt'.
1215 Therefore, for Ada units, we check the character immediately
1216 before the 't', and if we do not find a 'T', then make sure to
1217 create the associated symbol in the STRUCT_DOMAIN ('t' definitions
1218 will be stored in the VAR_DOMAIN). If the symbol was indeed
1219 defined as 'Tt' then the STRUCT_DOMAIN symbol will be created
1220 elsewhere, so we don't need to take care of that.
1222 This is important to do, because of forward references:
1223 The cleanup of undefined types stored in undef_types only uses
1224 STRUCT_DOMAIN symbols to perform the replacement. */
1225 synonym
= (sym
->language () == language_ada
&& p
[-2] != 'T');
1228 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
1230 /* For a nameless type, we don't want a create a symbol, thus we
1231 did not use `sym'. Return without further processing. */
1235 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
1236 SYMBOL_VALUE (sym
) = valu
;
1237 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1238 /* C++ vagaries: we may have a type which is derived from
1239 a base type which did not have its name defined when the
1240 derived class was output. We fill in the derived class's
1241 base part member's name here in that case. */
1242 if (SYMBOL_TYPE (sym
)->name () != NULL
)
1243 if ((SYMBOL_TYPE (sym
)->code () == TYPE_CODE_STRUCT
1244 || SYMBOL_TYPE (sym
)->code () == TYPE_CODE_UNION
)
1245 && TYPE_N_BASECLASSES (SYMBOL_TYPE (sym
)))
1249 for (j
= TYPE_N_BASECLASSES (SYMBOL_TYPE (sym
)) - 1; j
>= 0; j
--)
1250 if (TYPE_BASECLASS_NAME (SYMBOL_TYPE (sym
), j
) == 0)
1251 TYPE_BASECLASS_NAME (SYMBOL_TYPE (sym
), j
) =
1252 TYPE_BASECLASS (SYMBOL_TYPE (sym
), j
)->name ();
1255 if (SYMBOL_TYPE (sym
)->name () == NULL
)
1257 if ((SYMBOL_TYPE (sym
)->code () == TYPE_CODE_PTR
1258 && strcmp (sym
->linkage_name (), vtbl_ptr_name
))
1259 || SYMBOL_TYPE (sym
)->code () == TYPE_CODE_FUNC
)
1261 /* If we are giving a name to a type such as "pointer to
1262 foo" or "function returning foo", we better not set
1263 the TYPE_NAME. If the program contains "typedef char
1264 *caddr_t;", we don't want all variables of type char
1265 * to print as caddr_t. This is not just a
1266 consequence of GDB's type management; PCC and GCC (at
1267 least through version 2.4) both output variables of
1268 either type char * or caddr_t with the type number
1269 defined in the 't' symbol for caddr_t. If a future
1270 compiler cleans this up it GDB is not ready for it
1271 yet, but if it becomes ready we somehow need to
1272 disable this check (without breaking the PCC/GCC2.4
1277 Fortunately, this check seems not to be necessary
1278 for anything except pointers or functions. */
1279 /* ezannoni: 2000-10-26. This seems to apply for
1280 versions of gcc older than 2.8. This was the original
1281 problem: with the following code gdb would tell that
1282 the type for name1 is caddr_t, and func is char().
1284 typedef char *caddr_t;
1296 /* Pascal accepts names for pointer types. */
1297 if (get_current_subfile ()->language
== language_pascal
)
1298 SYMBOL_TYPE (sym
)->set_name (sym
->linkage_name ());
1301 SYMBOL_TYPE (sym
)->set_name (sym
->linkage_name ());
1304 add_symbol_to_list (sym
, get_file_symbols ());
1308 /* Create the STRUCT_DOMAIN clone. */
1309 struct symbol
*struct_sym
= new (&objfile
->objfile_obstack
) symbol
;
1312 SYMBOL_ACLASS_INDEX (struct_sym
) = LOC_TYPEDEF
;
1313 SYMBOL_VALUE (struct_sym
) = valu
;
1314 SYMBOL_DOMAIN (struct_sym
) = STRUCT_DOMAIN
;
1315 if (SYMBOL_TYPE (sym
)->name () == 0)
1316 SYMBOL_TYPE (sym
)->set_name
1317 (obconcat (&objfile
->objfile_obstack
, sym
->linkage_name (),
1319 add_symbol_to_list (struct_sym
, get_file_symbols ());
1325 /* Struct, union, or enum tag. For GNU C++, this can be be followed
1326 by 't' which means we are typedef'ing it as well. */
1327 synonym
= *p
== 't';
1332 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
1334 /* For a nameless type, we don't want a create a symbol, thus we
1335 did not use `sym'. Return without further processing. */
1339 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
1340 SYMBOL_VALUE (sym
) = valu
;
1341 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
1342 if (SYMBOL_TYPE (sym
)->name () == 0)
1343 SYMBOL_TYPE (sym
)->set_name
1344 (obconcat (&objfile
->objfile_obstack
, sym
->linkage_name (),
1346 add_symbol_to_list (sym
, get_file_symbols ());
1350 /* Clone the sym and then modify it. */
1351 struct symbol
*typedef_sym
= new (&objfile
->objfile_obstack
) symbol
;
1353 *typedef_sym
= *sym
;
1354 SYMBOL_ACLASS_INDEX (typedef_sym
) = LOC_TYPEDEF
;
1355 SYMBOL_VALUE (typedef_sym
) = valu
;
1356 SYMBOL_DOMAIN (typedef_sym
) = VAR_DOMAIN
;
1357 if (SYMBOL_TYPE (sym
)->name () == 0)
1358 SYMBOL_TYPE (sym
)->set_name
1359 (obconcat (&objfile
->objfile_obstack
, sym
->linkage_name (),
1361 add_symbol_to_list (typedef_sym
, get_file_symbols ());
1366 /* Static symbol of local scope. */
1367 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
1368 SYMBOL_ACLASS_INDEX (sym
) = LOC_STATIC
;
1369 SET_SYMBOL_VALUE_ADDRESS (sym
, valu
);
1370 if (gdbarch_static_transform_name_p (gdbarch
)
1371 && gdbarch_static_transform_name (gdbarch
, sym
->linkage_name ())
1372 != sym
->linkage_name ())
1374 struct bound_minimal_symbol msym
;
1376 msym
= lookup_minimal_symbol (sym
->linkage_name (), NULL
, objfile
);
1377 if (msym
.minsym
!= NULL
)
1379 const char *new_name
= gdbarch_static_transform_name
1380 (gdbarch
, sym
->linkage_name ());
1382 sym
->set_linkage_name (new_name
);
1383 SET_SYMBOL_VALUE_ADDRESS (sym
, BMSYMBOL_VALUE_ADDRESS (msym
));
1386 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1387 add_symbol_to_list (sym
, get_local_symbols ());
1391 /* Reference parameter */
1392 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
1393 SYMBOL_ACLASS_INDEX (sym
) = LOC_REF_ARG
;
1394 SYMBOL_IS_ARGUMENT (sym
) = 1;
1395 SYMBOL_VALUE (sym
) = valu
;
1396 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1397 add_symbol_to_list (sym
, get_local_symbols ());
1401 /* Reference parameter which is in a register. */
1402 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
1403 SYMBOL_ACLASS_INDEX (sym
) = stab_regparm_index
;
1404 SYMBOL_IS_ARGUMENT (sym
) = 1;
1405 SYMBOL_VALUE (sym
) = valu
;
1406 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1407 add_symbol_to_list (sym
, get_local_symbols ());
1411 /* This is used by Sun FORTRAN for "function result value".
1412 Sun claims ("dbx and dbxtool interfaces", 2nd ed)
1413 that Pascal uses it too, but when I tried it Pascal used
1414 "x:3" (local symbol) instead. */
1415 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
1416 SYMBOL_ACLASS_INDEX (sym
) = LOC_LOCAL
;
1417 SYMBOL_VALUE (sym
) = valu
;
1418 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1419 add_symbol_to_list (sym
, get_local_symbols ());
1423 SYMBOL_TYPE (sym
) = error_type (&p
, objfile
);
1424 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST
;
1425 SYMBOL_VALUE (sym
) = 0;
1426 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1427 add_symbol_to_list (sym
, get_file_symbols ());
1431 /* Some systems pass variables of certain types by reference instead
1432 of by value, i.e. they will pass the address of a structure (in a
1433 register or on the stack) instead of the structure itself. */
1435 if (gdbarch_stabs_argument_has_addr (gdbarch
, SYMBOL_TYPE (sym
))
1436 && SYMBOL_IS_ARGUMENT (sym
))
1438 /* We have to convert LOC_REGISTER to LOC_REGPARM_ADDR (for
1439 variables passed in a register). */
1440 if (SYMBOL_CLASS (sym
) == LOC_REGISTER
)
1441 SYMBOL_ACLASS_INDEX (sym
) = LOC_REGPARM_ADDR
;
1442 /* Likewise for converting LOC_ARG to LOC_REF_ARG (for the 7th
1443 and subsequent arguments on SPARC, for example). */
1444 else if (SYMBOL_CLASS (sym
) == LOC_ARG
)
1445 SYMBOL_ACLASS_INDEX (sym
) = LOC_REF_ARG
;
1451 /* Skip rest of this symbol and return an error type.
1453 General notes on error recovery: error_type always skips to the
1454 end of the symbol (modulo cretinous dbx symbol name continuation).
1455 Thus code like this:
1457 if (*(*pp)++ != ';')
1458 return error_type (pp, objfile);
1460 is wrong because if *pp starts out pointing at '\0' (typically as the
1461 result of an earlier error), it will be incremented to point to the
1462 start of the next symbol, which might produce strange results, at least
1463 if you run off the end of the string table. Instead use
1466 return error_type (pp, objfile);
1472 foo = error_type (pp, objfile);
1476 And in case it isn't obvious, the point of all this hair is so the compiler
1477 can define new types and new syntaxes, and old versions of the
1478 debugger will be able to read the new symbol tables. */
1480 static struct type
*
1481 error_type (const char **pp
, struct objfile
*objfile
)
1483 complaint (_("couldn't parse type; debugger out of date?"));
1486 /* Skip to end of symbol. */
1487 while (**pp
!= '\0')
1492 /* Check for and handle cretinous dbx symbol name continuation! */
1493 if ((*pp
)[-1] == '\\' || (*pp
)[-1] == '?')
1495 *pp
= next_symbol_text (objfile
);
1502 return objfile_type (objfile
)->builtin_error
;
1506 /* Read type information or a type definition; return the type. Even
1507 though this routine accepts either type information or a type
1508 definition, the distinction is relevant--some parts of stabsread.c
1509 assume that type information starts with a digit, '-', or '(' in
1510 deciding whether to call read_type. */
1512 static struct type
*
1513 read_type (const char **pp
, struct objfile
*objfile
)
1515 struct type
*type
= 0;
1518 char type_descriptor
;
1520 /* Size in bits of type if specified by a type attribute, or -1 if
1521 there is no size attribute. */
1524 /* Used to distinguish string and bitstring from char-array and set. */
1527 /* Used to distinguish vector from array. */
1530 /* Read type number if present. The type number may be omitted.
1531 for instance in a two-dimensional array declared with type
1532 "ar1;1;10;ar1;1;10;4". */
1533 if ((**pp
>= '0' && **pp
<= '9')
1537 if (read_type_number (pp
, typenums
) != 0)
1538 return error_type (pp
, objfile
);
1542 /* Type is not being defined here. Either it already
1543 exists, or this is a forward reference to it.
1544 dbx_alloc_type handles both cases. */
1545 type
= dbx_alloc_type (typenums
, objfile
);
1547 /* If this is a forward reference, arrange to complain if it
1548 doesn't get patched up by the time we're done
1550 if (type
->code () == TYPE_CODE_UNDEF
)
1551 add_undefined_type (type
, typenums
);
1556 /* Type is being defined here. */
1558 Also skip the type descriptor - we get it below with (*pp)[-1]. */
1563 /* 'typenums=' not present, type is anonymous. Read and return
1564 the definition, but don't put it in the type vector. */
1565 typenums
[0] = typenums
[1] = -1;
1570 type_descriptor
= (*pp
)[-1];
1571 switch (type_descriptor
)
1575 enum type_code code
;
1577 /* Used to index through file_symbols. */
1578 struct pending
*ppt
;
1581 /* Name including "struct", etc. */
1585 const char *from
, *p
, *q1
, *q2
;
1587 /* Set the type code according to the following letter. */
1591 code
= TYPE_CODE_STRUCT
;
1594 code
= TYPE_CODE_UNION
;
1597 code
= TYPE_CODE_ENUM
;
1601 /* Complain and keep going, so compilers can invent new
1602 cross-reference types. */
1603 complaint (_("Unrecognized cross-reference type `%c'"),
1605 code
= TYPE_CODE_STRUCT
;
1610 q1
= strchr (*pp
, '<');
1611 p
= strchr (*pp
, ':');
1613 return error_type (pp
, objfile
);
1614 if (q1
&& p
> q1
&& p
[1] == ':')
1616 int nesting_level
= 0;
1618 for (q2
= q1
; *q2
; q2
++)
1622 else if (*q2
== '>')
1624 else if (*q2
== ':' && nesting_level
== 0)
1629 return error_type (pp
, objfile
);
1632 if (get_current_subfile ()->language
== language_cplus
)
1634 char *name
= (char *) alloca (p
- *pp
+ 1);
1636 memcpy (name
, *pp
, p
- *pp
);
1637 name
[p
- *pp
] = '\0';
1639 gdb::unique_xmalloc_ptr
<char> new_name
= cp_canonicalize_string (name
);
1640 if (new_name
!= nullptr)
1641 type_name
= obstack_strdup (&objfile
->objfile_obstack
,
1644 if (type_name
== NULL
)
1646 char *to
= type_name
= (char *)
1647 obstack_alloc (&objfile
->objfile_obstack
, p
- *pp
+ 1);
1649 /* Copy the name. */
1656 /* Set the pointer ahead of the name which we just read, and
1661 /* If this type has already been declared, then reuse the same
1662 type, rather than allocating a new one. This saves some
1665 for (ppt
= *get_file_symbols (); ppt
; ppt
= ppt
->next
)
1666 for (i
= 0; i
< ppt
->nsyms
; i
++)
1668 struct symbol
*sym
= ppt
->symbol
[i
];
1670 if (SYMBOL_CLASS (sym
) == LOC_TYPEDEF
1671 && SYMBOL_DOMAIN (sym
) == STRUCT_DOMAIN
1672 && (SYMBOL_TYPE (sym
)->code () == code
)
1673 && strcmp (sym
->linkage_name (), type_name
) == 0)
1675 obstack_free (&objfile
->objfile_obstack
, type_name
);
1676 type
= SYMBOL_TYPE (sym
);
1677 if (typenums
[0] != -1)
1678 *dbx_lookup_type (typenums
, objfile
) = type
;
1683 /* Didn't find the type to which this refers, so we must
1684 be dealing with a forward reference. Allocate a type
1685 structure for it, and keep track of it so we can
1686 fill in the rest of the fields when we get the full
1688 type
= dbx_alloc_type (typenums
, objfile
);
1689 type
->set_code (code
);
1690 type
->set_name (type_name
);
1691 INIT_CPLUS_SPECIFIC (type
);
1692 TYPE_STUB (type
) = 1;
1694 add_undefined_type (type
, typenums
);
1698 case '-': /* RS/6000 built-in type */
1712 /* We deal with something like t(1,2)=(3,4)=... which
1713 the Lucid compiler and recent gcc versions (post 2.7.3) use. */
1715 /* Allocate and enter the typedef type first.
1716 This handles recursive types. */
1717 type
= dbx_alloc_type (typenums
, objfile
);
1718 type
->set_code (TYPE_CODE_TYPEDEF
);
1720 struct type
*xtype
= read_type (pp
, objfile
);
1724 /* It's being defined as itself. That means it is "void". */
1725 type
->set_code (TYPE_CODE_VOID
);
1726 TYPE_LENGTH (type
) = 1;
1728 else if (type_size
>= 0 || is_string
)
1730 /* This is the absolute wrong way to construct types. Every
1731 other debug format has found a way around this problem and
1732 the related problems with unnecessarily stubbed types;
1733 someone motivated should attempt to clean up the issue
1734 here as well. Once a type pointed to has been created it
1735 should not be modified.
1737 Well, it's not *absolutely* wrong. Constructing recursive
1738 types (trees, linked lists) necessarily entails modifying
1739 types after creating them. Constructing any loop structure
1740 entails side effects. The Dwarf 2 reader does handle this
1741 more gracefully (it never constructs more than once
1742 instance of a type object, so it doesn't have to copy type
1743 objects wholesale), but it still mutates type objects after
1744 other folks have references to them.
1746 Keep in mind that this circularity/mutation issue shows up
1747 at the source language level, too: C's "incomplete types",
1748 for example. So the proper cleanup, I think, would be to
1749 limit GDB's type smashing to match exactly those required
1750 by the source language. So GDB could have a
1751 "complete_this_type" function, but never create unnecessary
1752 copies of a type otherwise. */
1753 replace_type (type
, xtype
);
1754 type
->set_name (NULL
);
1758 TYPE_TARGET_STUB (type
) = 1;
1759 TYPE_TARGET_TYPE (type
) = xtype
;
1764 /* In the following types, we must be sure to overwrite any existing
1765 type that the typenums refer to, rather than allocating a new one
1766 and making the typenums point to the new one. This is because there
1767 may already be pointers to the existing type (if it had been
1768 forward-referenced), and we must change it to a pointer, function,
1769 reference, or whatever, *in-place*. */
1771 case '*': /* Pointer to another type */
1772 type1
= read_type (pp
, objfile
);
1773 type
= make_pointer_type (type1
, dbx_lookup_type (typenums
, objfile
));
1776 case '&': /* Reference to another type */
1777 type1
= read_type (pp
, objfile
);
1778 type
= make_reference_type (type1
, dbx_lookup_type (typenums
, objfile
),
1782 case 'f': /* Function returning another type */
1783 type1
= read_type (pp
, objfile
);
1784 type
= make_function_type (type1
, dbx_lookup_type (typenums
, objfile
));
1787 case 'g': /* Prototyped function. (Sun) */
1789 /* Unresolved questions:
1791 - According to Sun's ``STABS Interface Manual'', for 'f'
1792 and 'F' symbol descriptors, a `0' in the argument type list
1793 indicates a varargs function. But it doesn't say how 'g'
1794 type descriptors represent that info. Someone with access
1795 to Sun's toolchain should try it out.
1797 - According to the comment in define_symbol (search for
1798 `process_prototype_types:'), Sun emits integer arguments as
1799 types which ref themselves --- like `void' types. Do we
1800 have to deal with that here, too? Again, someone with
1801 access to Sun's toolchain should try it out and let us
1804 const char *type_start
= (*pp
) - 1;
1805 struct type
*return_type
= read_type (pp
, objfile
);
1806 struct type
*func_type
1807 = make_function_type (return_type
,
1808 dbx_lookup_type (typenums
, objfile
));
1811 struct type_list
*next
;
1815 while (**pp
&& **pp
!= '#')
1817 struct type
*arg_type
= read_type (pp
, objfile
);
1818 struct type_list
*newobj
= XALLOCA (struct type_list
);
1819 newobj
->type
= arg_type
;
1820 newobj
->next
= arg_types
;
1828 complaint (_("Prototyped function type didn't "
1829 "end arguments with `#':\n%s"),
1833 /* If there is just one argument whose type is `void', then
1834 that's just an empty argument list. */
1836 && ! arg_types
->next
1837 && arg_types
->type
->code () == TYPE_CODE_VOID
)
1840 func_type
->set_fields
1841 ((struct field
*) TYPE_ALLOC (func_type
,
1842 num_args
* sizeof (struct field
)));
1843 memset (func_type
->fields (), 0, num_args
* sizeof (struct field
));
1846 struct type_list
*t
;
1848 /* We stuck each argument type onto the front of the list
1849 when we read it, so the list is reversed. Build the
1850 fields array right-to-left. */
1851 for (t
= arg_types
, i
= num_args
- 1; t
; t
= t
->next
, i
--)
1852 func_type
->field (i
).set_type (t
->type
);
1854 func_type
->set_num_fields (num_args
);
1855 TYPE_PROTOTYPED (func_type
) = 1;
1861 case 'k': /* Const qualifier on some type (Sun) */
1862 type
= read_type (pp
, objfile
);
1863 type
= make_cv_type (1, TYPE_VOLATILE (type
), type
,
1864 dbx_lookup_type (typenums
, objfile
));
1867 case 'B': /* Volatile qual on some type (Sun) */
1868 type
= read_type (pp
, objfile
);
1869 type
= make_cv_type (TYPE_CONST (type
), 1, type
,
1870 dbx_lookup_type (typenums
, objfile
));
1874 if (isdigit (**pp
) || **pp
== '(' || **pp
== '-')
1875 { /* Member (class & variable) type */
1876 /* FIXME -- we should be doing smash_to_XXX types here. */
1878 struct type
*domain
= read_type (pp
, objfile
);
1879 struct type
*memtype
;
1882 /* Invalid member type data format. */
1883 return error_type (pp
, objfile
);
1886 memtype
= read_type (pp
, objfile
);
1887 type
= dbx_alloc_type (typenums
, objfile
);
1888 smash_to_memberptr_type (type
, domain
, memtype
);
1891 /* type attribute */
1893 const char *attr
= *pp
;
1895 /* Skip to the semicolon. */
1896 while (**pp
!= ';' && **pp
!= '\0')
1899 return error_type (pp
, objfile
);
1901 ++ * pp
; /* Skip the semicolon. */
1905 case 's': /* Size attribute */
1906 type_size
= atoi (attr
+ 1);
1911 case 'S': /* String attribute */
1912 /* FIXME: check to see if following type is array? */
1916 case 'V': /* Vector attribute */
1917 /* FIXME: check to see if following type is array? */
1922 /* Ignore unrecognized type attributes, so future compilers
1923 can invent new ones. */
1931 case '#': /* Method (class & fn) type */
1932 if ((*pp
)[0] == '#')
1934 /* We'll get the parameter types from the name. */
1935 struct type
*return_type
;
1938 return_type
= read_type (pp
, objfile
);
1939 if (*(*pp
)++ != ';')
1940 complaint (_("invalid (minimal) member type "
1941 "data format at symtab pos %d."),
1943 type
= allocate_stub_method (return_type
);
1944 if (typenums
[0] != -1)
1945 *dbx_lookup_type (typenums
, objfile
) = type
;
1949 struct type
*domain
= read_type (pp
, objfile
);
1950 struct type
*return_type
;
1955 /* Invalid member type data format. */
1956 return error_type (pp
, objfile
);
1960 return_type
= read_type (pp
, objfile
);
1961 args
= read_args (pp
, ';', objfile
, &nargs
, &varargs
);
1963 return error_type (pp
, objfile
);
1964 type
= dbx_alloc_type (typenums
, objfile
);
1965 smash_to_method_type (type
, domain
, return_type
, args
,
1970 case 'r': /* Range type */
1971 type
= read_range_type (pp
, typenums
, type_size
, objfile
);
1972 if (typenums
[0] != -1)
1973 *dbx_lookup_type (typenums
, objfile
) = type
;
1978 /* Sun ACC builtin int type */
1979 type
= read_sun_builtin_type (pp
, typenums
, objfile
);
1980 if (typenums
[0] != -1)
1981 *dbx_lookup_type (typenums
, objfile
) = type
;
1985 case 'R': /* Sun ACC builtin float type */
1986 type
= read_sun_floating_type (pp
, typenums
, objfile
);
1987 if (typenums
[0] != -1)
1988 *dbx_lookup_type (typenums
, objfile
) = type
;
1991 case 'e': /* Enumeration type */
1992 type
= dbx_alloc_type (typenums
, objfile
);
1993 type
= read_enum_type (pp
, type
, objfile
);
1994 if (typenums
[0] != -1)
1995 *dbx_lookup_type (typenums
, objfile
) = type
;
1998 case 's': /* Struct type */
1999 case 'u': /* Union type */
2001 enum type_code type_code
= TYPE_CODE_UNDEF
;
2002 type
= dbx_alloc_type (typenums
, objfile
);
2003 switch (type_descriptor
)
2006 type_code
= TYPE_CODE_STRUCT
;
2009 type_code
= TYPE_CODE_UNION
;
2012 type
= read_struct_type (pp
, type
, type_code
, objfile
);
2016 case 'a': /* Array type */
2018 return error_type (pp
, objfile
);
2021 type
= dbx_alloc_type (typenums
, objfile
);
2022 type
= read_array_type (pp
, type
, objfile
);
2024 type
->set_code (TYPE_CODE_STRING
);
2026 make_vector_type (type
);
2029 case 'S': /* Set type */
2030 type1
= read_type (pp
, objfile
);
2031 type
= create_set_type (NULL
, type1
);
2032 if (typenums
[0] != -1)
2033 *dbx_lookup_type (typenums
, objfile
) = type
;
2037 --*pp
; /* Go back to the symbol in error. */
2038 /* Particularly important if it was \0! */
2039 return error_type (pp
, objfile
);
2044 warning (_("GDB internal error, type is NULL in stabsread.c."));
2045 return error_type (pp
, objfile
);
2048 /* Size specified in a type attribute overrides any other size. */
2049 if (type_size
!= -1)
2050 TYPE_LENGTH (type
) = (type_size
+ TARGET_CHAR_BIT
- 1) / TARGET_CHAR_BIT
;
2055 /* RS/6000 xlc/dbx combination uses a set of builtin types, starting from -1.
2056 Return the proper type node for a given builtin type number. */
2058 static const struct objfile_key
<struct type
*,
2059 gdb::noop_deleter
<struct type
*>>
2060 rs6000_builtin_type_data
;
2062 static struct type
*
2063 rs6000_builtin_type (int typenum
, struct objfile
*objfile
)
2065 struct type
**negative_types
= rs6000_builtin_type_data
.get (objfile
);
2067 /* We recognize types numbered from -NUMBER_RECOGNIZED to -1. */
2068 #define NUMBER_RECOGNIZED 34
2069 struct type
*rettype
= NULL
;
2071 if (typenum
>= 0 || typenum
< -NUMBER_RECOGNIZED
)
2073 complaint (_("Unknown builtin type %d"), typenum
);
2074 return objfile_type (objfile
)->builtin_error
;
2077 if (!negative_types
)
2079 /* This includes an empty slot for type number -0. */
2080 negative_types
= OBSTACK_CALLOC (&objfile
->objfile_obstack
,
2081 NUMBER_RECOGNIZED
+ 1, struct type
*);
2082 rs6000_builtin_type_data
.set (objfile
, negative_types
);
2085 if (negative_types
[-typenum
] != NULL
)
2086 return negative_types
[-typenum
];
2088 #if TARGET_CHAR_BIT != 8
2089 #error This code wrong for TARGET_CHAR_BIT not 8
2090 /* These definitions all assume that TARGET_CHAR_BIT is 8. I think
2091 that if that ever becomes not true, the correct fix will be to
2092 make the size in the struct type to be in bits, not in units of
2099 /* The size of this and all the other types are fixed, defined
2100 by the debugging format. If there is a type called "int" which
2101 is other than 32 bits, then it should use a new negative type
2102 number (or avoid negative type numbers for that case).
2103 See stabs.texinfo. */
2104 rettype
= init_integer_type (objfile
, 32, 0, "int");
2107 rettype
= init_integer_type (objfile
, 8, 0, "char");
2108 TYPE_NOSIGN (rettype
) = 1;
2111 rettype
= init_integer_type (objfile
, 16, 0, "short");
2114 rettype
= init_integer_type (objfile
, 32, 0, "long");
2117 rettype
= init_integer_type (objfile
, 8, 1, "unsigned char");
2120 rettype
= init_integer_type (objfile
, 8, 0, "signed char");
2123 rettype
= init_integer_type (objfile
, 16, 1, "unsigned short");
2126 rettype
= init_integer_type (objfile
, 32, 1, "unsigned int");
2129 rettype
= init_integer_type (objfile
, 32, 1, "unsigned");
2132 rettype
= init_integer_type (objfile
, 32, 1, "unsigned long");
2135 rettype
= init_type (objfile
, TYPE_CODE_VOID
, TARGET_CHAR_BIT
, "void");
2138 /* IEEE single precision (32 bit). */
2139 rettype
= init_float_type (objfile
, 32, "float",
2140 floatformats_ieee_single
);
2143 /* IEEE double precision (64 bit). */
2144 rettype
= init_float_type (objfile
, 64, "double",
2145 floatformats_ieee_double
);
2148 /* This is an IEEE double on the RS/6000, and different machines with
2149 different sizes for "long double" should use different negative
2150 type numbers. See stabs.texinfo. */
2151 rettype
= init_float_type (objfile
, 64, "long double",
2152 floatformats_ieee_double
);
2155 rettype
= init_integer_type (objfile
, 32, 0, "integer");
2158 rettype
= init_boolean_type (objfile
, 32, 1, "boolean");
2161 rettype
= init_float_type (objfile
, 32, "short real",
2162 floatformats_ieee_single
);
2165 rettype
= init_float_type (objfile
, 64, "real",
2166 floatformats_ieee_double
);
2169 rettype
= init_type (objfile
, TYPE_CODE_ERROR
, 0, "stringptr");
2172 rettype
= init_character_type (objfile
, 8, 1, "character");
2175 rettype
= init_boolean_type (objfile
, 8, 1, "logical*1");
2178 rettype
= init_boolean_type (objfile
, 16, 1, "logical*2");
2181 rettype
= init_boolean_type (objfile
, 32, 1, "logical*4");
2184 rettype
= init_boolean_type (objfile
, 32, 1, "logical");
2187 /* Complex type consisting of two IEEE single precision values. */
2188 rettype
= init_complex_type ("complex",
2189 rs6000_builtin_type (12, objfile
));
2192 /* Complex type consisting of two IEEE double precision values. */
2193 rettype
= init_complex_type ("double complex",
2194 rs6000_builtin_type (13, objfile
));
2197 rettype
= init_integer_type (objfile
, 8, 0, "integer*1");
2200 rettype
= init_integer_type (objfile
, 16, 0, "integer*2");
2203 rettype
= init_integer_type (objfile
, 32, 0, "integer*4");
2206 rettype
= init_character_type (objfile
, 16, 0, "wchar");
2209 rettype
= init_integer_type (objfile
, 64, 0, "long long");
2212 rettype
= init_integer_type (objfile
, 64, 1, "unsigned long long");
2215 rettype
= init_integer_type (objfile
, 64, 1, "logical*8");
2218 rettype
= init_integer_type (objfile
, 64, 0, "integer*8");
2221 negative_types
[-typenum
] = rettype
;
2225 /* This page contains subroutines of read_type. */
2227 /* Wrapper around method_name_from_physname to flag a complaint
2228 if there is an error. */
2231 stabs_method_name_from_physname (const char *physname
)
2235 method_name
= method_name_from_physname (physname
);
2237 if (method_name
== NULL
)
2239 complaint (_("Method has bad physname %s\n"), physname
);
2246 /* Read member function stabs info for C++ classes. The form of each member
2249 NAME :: TYPENUM[=type definition] ARGS : PHYSNAME ;
2251 An example with two member functions is:
2253 afunc1::20=##15;:i;2A.;afunc2::20:i;2A.;
2255 For the case of overloaded operators, the format is op$::*.funcs, where
2256 $ is the CPLUS_MARKER (usually '$'), `*' holds the place for an operator
2257 name (such as `+=') and `.' marks the end of the operator name.
2259 Returns 1 for success, 0 for failure. */
2262 read_member_functions (struct stab_field_info
*fip
, const char **pp
,
2263 struct type
*type
, struct objfile
*objfile
)
2270 struct next_fnfield
*next
;
2271 struct fn_field fn_field
;
2274 struct type
*look_ahead_type
;
2275 struct next_fnfieldlist
*new_fnlist
;
2276 struct next_fnfield
*new_sublist
;
2280 /* Process each list until we find something that is not a member function
2281 or find the end of the functions. */
2285 /* We should be positioned at the start of the function name.
2286 Scan forward to find the first ':' and if it is not the
2287 first of a "::" delimiter, then this is not a member function. */
2299 look_ahead_type
= NULL
;
2302 new_fnlist
= OBSTACK_ZALLOC (&fip
->obstack
, struct next_fnfieldlist
);
2304 if ((*pp
)[0] == 'o' && (*pp
)[1] == 'p' && is_cplus_marker ((*pp
)[2]))
2306 /* This is a completely wierd case. In order to stuff in the
2307 names that might contain colons (the usual name delimiter),
2308 Mike Tiemann defined a different name format which is
2309 signalled if the identifier is "op$". In that case, the
2310 format is "op$::XXXX." where XXXX is the name. This is
2311 used for names like "+" or "=". YUUUUUUUK! FIXME! */
2312 /* This lets the user type "break operator+".
2313 We could just put in "+" as the name, but that wouldn't
2315 static char opname
[32] = "op$";
2316 char *o
= opname
+ 3;
2318 /* Skip past '::'. */
2321 STABS_CONTINUE (pp
, objfile
);
2327 main_fn_name
= savestring (opname
, o
- opname
);
2333 main_fn_name
= savestring (*pp
, p
- *pp
);
2334 /* Skip past '::'. */
2337 new_fnlist
->fn_fieldlist
.name
= main_fn_name
;
2341 new_sublist
= OBSTACK_ZALLOC (&fip
->obstack
, struct next_fnfield
);
2343 /* Check for and handle cretinous dbx symbol name continuation! */
2344 if (look_ahead_type
== NULL
)
2347 STABS_CONTINUE (pp
, objfile
);
2349 new_sublist
->fn_field
.type
= read_type (pp
, objfile
);
2352 /* Invalid symtab info for member function. */
2358 /* g++ version 1 kludge */
2359 new_sublist
->fn_field
.type
= look_ahead_type
;
2360 look_ahead_type
= NULL
;
2370 /* These are methods, not functions. */
2371 if (new_sublist
->fn_field
.type
->code () == TYPE_CODE_FUNC
)
2372 new_sublist
->fn_field
.type
->set_code (TYPE_CODE_METHOD
);
2374 gdb_assert (new_sublist
->fn_field
.type
->code ()
2375 == TYPE_CODE_METHOD
);
2377 /* If this is just a stub, then we don't have the real name here. */
2378 if (TYPE_STUB (new_sublist
->fn_field
.type
))
2380 if (!TYPE_SELF_TYPE (new_sublist
->fn_field
.type
))
2381 set_type_self_type (new_sublist
->fn_field
.type
, type
);
2382 new_sublist
->fn_field
.is_stub
= 1;
2385 new_sublist
->fn_field
.physname
= savestring (*pp
, p
- *pp
);
2388 /* Set this member function's visibility fields. */
2391 case VISIBILITY_PRIVATE
:
2392 new_sublist
->fn_field
.is_private
= 1;
2394 case VISIBILITY_PROTECTED
:
2395 new_sublist
->fn_field
.is_protected
= 1;
2399 STABS_CONTINUE (pp
, objfile
);
2402 case 'A': /* Normal functions. */
2403 new_sublist
->fn_field
.is_const
= 0;
2404 new_sublist
->fn_field
.is_volatile
= 0;
2407 case 'B': /* `const' member functions. */
2408 new_sublist
->fn_field
.is_const
= 1;
2409 new_sublist
->fn_field
.is_volatile
= 0;
2412 case 'C': /* `volatile' member function. */
2413 new_sublist
->fn_field
.is_const
= 0;
2414 new_sublist
->fn_field
.is_volatile
= 1;
2417 case 'D': /* `const volatile' member function. */
2418 new_sublist
->fn_field
.is_const
= 1;
2419 new_sublist
->fn_field
.is_volatile
= 1;
2422 case '*': /* File compiled with g++ version 1 --
2428 complaint (_("const/volatile indicator missing, got '%c'"),
2438 /* virtual member function, followed by index.
2439 The sign bit is set to distinguish pointers-to-methods
2440 from virtual function indicies. Since the array is
2441 in words, the quantity must be shifted left by 1
2442 on 16 bit machine, and by 2 on 32 bit machine, forcing
2443 the sign bit out, and usable as a valid index into
2444 the array. Remove the sign bit here. */
2445 new_sublist
->fn_field
.voffset
=
2446 (0x7fffffff & read_huge_number (pp
, ';', &nbits
, 0)) + 2;
2450 STABS_CONTINUE (pp
, objfile
);
2451 if (**pp
== ';' || **pp
== '\0')
2453 /* Must be g++ version 1. */
2454 new_sublist
->fn_field
.fcontext
= 0;
2458 /* Figure out from whence this virtual function came.
2459 It may belong to virtual function table of
2460 one of its baseclasses. */
2461 look_ahead_type
= read_type (pp
, objfile
);
2464 /* g++ version 1 overloaded methods. */
2468 new_sublist
->fn_field
.fcontext
= look_ahead_type
;
2477 look_ahead_type
= NULL
;
2483 /* static member function. */
2485 int slen
= strlen (main_fn_name
);
2487 new_sublist
->fn_field
.voffset
= VOFFSET_STATIC
;
2489 /* For static member functions, we can't tell if they
2490 are stubbed, as they are put out as functions, and not as
2492 GCC v2 emits the fully mangled name if
2493 dbxout.c:flag_minimal_debug is not set, so we have to
2494 detect a fully mangled physname here and set is_stub
2495 accordingly. Fully mangled physnames in v2 start with
2496 the member function name, followed by two underscores.
2497 GCC v3 currently always emits stubbed member functions,
2498 but with fully mangled physnames, which start with _Z. */
2499 if (!(strncmp (new_sublist
->fn_field
.physname
,
2500 main_fn_name
, slen
) == 0
2501 && new_sublist
->fn_field
.physname
[slen
] == '_'
2502 && new_sublist
->fn_field
.physname
[slen
+ 1] == '_'))
2504 new_sublist
->fn_field
.is_stub
= 1;
2511 complaint (_("member function type missing, got '%c'"),
2513 /* Normal member function. */
2517 /* normal member function. */
2518 new_sublist
->fn_field
.voffset
= 0;
2519 new_sublist
->fn_field
.fcontext
= 0;
2523 new_sublist
->next
= sublist
;
2524 sublist
= new_sublist
;
2526 STABS_CONTINUE (pp
, objfile
);
2528 while (**pp
!= ';' && **pp
!= '\0');
2531 STABS_CONTINUE (pp
, objfile
);
2533 /* Skip GCC 3.X member functions which are duplicates of the callable
2534 constructor/destructor. */
2535 if (strcmp_iw (main_fn_name
, "__base_ctor ") == 0
2536 || strcmp_iw (main_fn_name
, "__base_dtor ") == 0
2537 || strcmp (main_fn_name
, "__deleting_dtor") == 0)
2539 xfree (main_fn_name
);
2543 int has_destructor
= 0, has_other
= 0;
2545 struct next_fnfield
*tmp_sublist
;
2547 /* Various versions of GCC emit various mostly-useless
2548 strings in the name field for special member functions.
2550 For stub methods, we need to defer correcting the name
2551 until we are ready to unstub the method, because the current
2552 name string is used by gdb_mangle_name. The only stub methods
2553 of concern here are GNU v2 operators; other methods have their
2554 names correct (see caveat below).
2556 For non-stub methods, in GNU v3, we have a complete physname.
2557 Therefore we can safely correct the name now. This primarily
2558 affects constructors and destructors, whose name will be
2559 __comp_ctor or __comp_dtor instead of Foo or ~Foo. Cast
2560 operators will also have incorrect names; for instance,
2561 "operator int" will be named "operator i" (i.e. the type is
2564 For non-stub methods in GNU v2, we have no easy way to
2565 know if we have a complete physname or not. For most
2566 methods the result depends on the platform (if CPLUS_MARKER
2567 can be `$' or `.', it will use minimal debug information, or
2568 otherwise the full physname will be included).
2570 Rather than dealing with this, we take a different approach.
2571 For v3 mangled names, we can use the full physname; for v2,
2572 we use cplus_demangle_opname (which is actually v2 specific),
2573 because the only interesting names are all operators - once again
2574 barring the caveat below. Skip this process if any method in the
2575 group is a stub, to prevent our fouling up the workings of
2578 The caveat: GCC 2.95.x (and earlier?) put constructors and
2579 destructors in the same method group. We need to split this
2580 into two groups, because they should have different names.
2581 So for each method group we check whether it contains both
2582 routines whose physname appears to be a destructor (the physnames
2583 for and destructors are always provided, due to quirks in v2
2584 mangling) and routines whose physname does not appear to be a
2585 destructor. If so then we break up the list into two halves.
2586 Even if the constructors and destructors aren't in the same group
2587 the destructor will still lack the leading tilde, so that also
2590 So, to summarize what we expect and handle here:
2592 Given Given Real Real Action
2593 method name physname physname method name
2595 __opi [none] __opi__3Foo operator int opname
2597 Foo _._3Foo _._3Foo ~Foo separate and
2599 operator i _ZN3FoocviEv _ZN3FoocviEv operator int demangle
2600 __comp_ctor _ZN3FooC1ERKS_ _ZN3FooC1ERKS_ Foo demangle
2603 tmp_sublist
= sublist
;
2604 while (tmp_sublist
!= NULL
)
2606 if (tmp_sublist
->fn_field
.physname
[0] == '_'
2607 && tmp_sublist
->fn_field
.physname
[1] == 'Z')
2610 if (is_destructor_name (tmp_sublist
->fn_field
.physname
))
2615 tmp_sublist
= tmp_sublist
->next
;
2618 if (has_destructor
&& has_other
)
2620 struct next_fnfieldlist
*destr_fnlist
;
2621 struct next_fnfield
*last_sublist
;
2623 /* Create a new fn_fieldlist for the destructors. */
2625 destr_fnlist
= OBSTACK_ZALLOC (&fip
->obstack
,
2626 struct next_fnfieldlist
);
2628 destr_fnlist
->fn_fieldlist
.name
2629 = obconcat (&objfile
->objfile_obstack
, "~",
2630 new_fnlist
->fn_fieldlist
.name
, (char *) NULL
);
2632 destr_fnlist
->fn_fieldlist
.fn_fields
=
2633 XOBNEWVEC (&objfile
->objfile_obstack
,
2634 struct fn_field
, has_destructor
);
2635 memset (destr_fnlist
->fn_fieldlist
.fn_fields
, 0,
2636 sizeof (struct fn_field
) * has_destructor
);
2637 tmp_sublist
= sublist
;
2638 last_sublist
= NULL
;
2640 while (tmp_sublist
!= NULL
)
2642 if (!is_destructor_name (tmp_sublist
->fn_field
.physname
))
2644 tmp_sublist
= tmp_sublist
->next
;
2648 destr_fnlist
->fn_fieldlist
.fn_fields
[i
++]
2649 = tmp_sublist
->fn_field
;
2651 last_sublist
->next
= tmp_sublist
->next
;
2653 sublist
= tmp_sublist
->next
;
2654 last_sublist
= tmp_sublist
;
2655 tmp_sublist
= tmp_sublist
->next
;
2658 destr_fnlist
->fn_fieldlist
.length
= has_destructor
;
2659 destr_fnlist
->next
= fip
->fnlist
;
2660 fip
->fnlist
= destr_fnlist
;
2662 length
-= has_destructor
;
2666 /* v3 mangling prevents the use of abbreviated physnames,
2667 so we can do this here. There are stubbed methods in v3
2669 - in -gstabs instead of -gstabs+
2670 - or for static methods, which are output as a function type
2671 instead of a method type. */
2672 char *new_method_name
=
2673 stabs_method_name_from_physname (sublist
->fn_field
.physname
);
2675 if (new_method_name
!= NULL
2676 && strcmp (new_method_name
,
2677 new_fnlist
->fn_fieldlist
.name
) != 0)
2679 new_fnlist
->fn_fieldlist
.name
= new_method_name
;
2680 xfree (main_fn_name
);
2683 xfree (new_method_name
);
2685 else if (has_destructor
&& new_fnlist
->fn_fieldlist
.name
[0] != '~')
2687 new_fnlist
->fn_fieldlist
.name
=
2688 obconcat (&objfile
->objfile_obstack
,
2689 "~", main_fn_name
, (char *)NULL
);
2690 xfree (main_fn_name
);
2693 new_fnlist
->fn_fieldlist
.fn_fields
2694 = OBSTACK_CALLOC (&objfile
->objfile_obstack
, length
, fn_field
);
2695 for (i
= length
; (i
--, sublist
); sublist
= sublist
->next
)
2697 new_fnlist
->fn_fieldlist
.fn_fields
[i
] = sublist
->fn_field
;
2700 new_fnlist
->fn_fieldlist
.length
= length
;
2701 new_fnlist
->next
= fip
->fnlist
;
2702 fip
->fnlist
= new_fnlist
;
2709 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
2710 TYPE_FN_FIELDLISTS (type
) = (struct fn_fieldlist
*)
2711 TYPE_ALLOC (type
, sizeof (struct fn_fieldlist
) * nfn_fields
);
2712 memset (TYPE_FN_FIELDLISTS (type
), 0,
2713 sizeof (struct fn_fieldlist
) * nfn_fields
);
2714 TYPE_NFN_FIELDS (type
) = nfn_fields
;
2720 /* Special GNU C++ name.
2722 Returns 1 for success, 0 for failure. "failure" means that we can't
2723 keep parsing and it's time for error_type(). */
2726 read_cpp_abbrev (struct stab_field_info
*fip
, const char **pp
,
2727 struct type
*type
, struct objfile
*objfile
)
2732 struct type
*context
;
2742 /* At this point, *pp points to something like "22:23=*22...",
2743 where the type number before the ':' is the "context" and
2744 everything after is a regular type definition. Lookup the
2745 type, find it's name, and construct the field name. */
2747 context
= read_type (pp
, objfile
);
2751 case 'f': /* $vf -- a virtual function table pointer */
2752 name
= context
->name ();
2757 fip
->list
->field
.name
= obconcat (&objfile
->objfile_obstack
,
2758 vptr_name
, name
, (char *) NULL
);
2761 case 'b': /* $vb -- a virtual bsomethingorother */
2762 name
= context
->name ();
2765 complaint (_("C++ abbreviated type name "
2766 "unknown at symtab pos %d"),
2770 fip
->list
->field
.name
= obconcat (&objfile
->objfile_obstack
, vb_name
,
2771 name
, (char *) NULL
);
2775 invalid_cpp_abbrev_complaint (*pp
);
2776 fip
->list
->field
.name
= obconcat (&objfile
->objfile_obstack
,
2777 "INVALID_CPLUSPLUS_ABBREV",
2782 /* At this point, *pp points to the ':'. Skip it and read the
2788 invalid_cpp_abbrev_complaint (*pp
);
2791 fip
->list
->field
.set_type (read_type (pp
, objfile
));
2793 (*pp
)++; /* Skip the comma. */
2800 SET_FIELD_BITPOS (fip
->list
->field
,
2801 read_huge_number (pp
, ';', &nbits
, 0));
2805 /* This field is unpacked. */
2806 FIELD_BITSIZE (fip
->list
->field
) = 0;
2807 fip
->list
->visibility
= VISIBILITY_PRIVATE
;
2811 invalid_cpp_abbrev_complaint (*pp
);
2812 /* We have no idea what syntax an unrecognized abbrev would have, so
2813 better return 0. If we returned 1, we would need to at least advance
2814 *pp to avoid an infinite loop. */
2821 read_one_struct_field (struct stab_field_info
*fip
, const char **pp
,
2822 const char *p
, struct type
*type
,
2823 struct objfile
*objfile
)
2825 struct gdbarch
*gdbarch
= objfile
->arch ();
2827 fip
->list
->field
.name
2828 = obstack_strndup (&objfile
->objfile_obstack
, *pp
, p
- *pp
);
2831 /* This means we have a visibility for a field coming. */
2835 fip
->list
->visibility
= *(*pp
)++;
2839 /* normal dbx-style format, no explicit visibility */
2840 fip
->list
->visibility
= VISIBILITY_PUBLIC
;
2843 fip
->list
->field
.set_type (read_type (pp
, objfile
));
2848 /* Possible future hook for nested types. */
2851 fip
->list
->field
.bitpos
= (long) -2; /* nested type */
2861 /* Static class member. */
2862 SET_FIELD_PHYSNAME (fip
->list
->field
, savestring (*pp
, p
- *pp
));
2866 else if (**pp
!= ',')
2868 /* Bad structure-type format. */
2869 stabs_general_complaint ("bad structure-type format");
2873 (*pp
)++; /* Skip the comma. */
2878 SET_FIELD_BITPOS (fip
->list
->field
,
2879 read_huge_number (pp
, ',', &nbits
, 0));
2882 stabs_general_complaint ("bad structure-type format");
2885 FIELD_BITSIZE (fip
->list
->field
) = read_huge_number (pp
, ';', &nbits
, 0);
2888 stabs_general_complaint ("bad structure-type format");
2893 if (FIELD_BITPOS (fip
->list
->field
) == 0
2894 && FIELD_BITSIZE (fip
->list
->field
) == 0)
2896 /* This can happen in two cases: (1) at least for gcc 2.4.5 or so,
2897 it is a field which has been optimized out. The correct stab for
2898 this case is to use VISIBILITY_IGNORE, but that is a recent
2899 invention. (2) It is a 0-size array. For example
2900 union { int num; char str[0]; } foo. Printing _("<no value>" for
2901 str in "p foo" is OK, since foo.str (and thus foo.str[3])
2902 will continue to work, and a 0-size array as a whole doesn't
2903 have any contents to print.
2905 I suspect this probably could also happen with gcc -gstabs (not
2906 -gstabs+) for static fields, and perhaps other C++ extensions.
2907 Hopefully few people use -gstabs with gdb, since it is intended
2908 for dbx compatibility. */
2910 /* Ignore this field. */
2911 fip
->list
->visibility
= VISIBILITY_IGNORE
;
2915 /* Detect an unpacked field and mark it as such.
2916 dbx gives a bit size for all fields.
2917 Note that forward refs cannot be packed,
2918 and treat enums as if they had the width of ints. */
2920 struct type
*field_type
= check_typedef (fip
->list
->field
.type ());
2922 if (field_type
->code () != TYPE_CODE_INT
2923 && field_type
->code () != TYPE_CODE_RANGE
2924 && field_type
->code () != TYPE_CODE_BOOL
2925 && field_type
->code () != TYPE_CODE_ENUM
)
2927 FIELD_BITSIZE (fip
->list
->field
) = 0;
2929 if ((FIELD_BITSIZE (fip
->list
->field
)
2930 == TARGET_CHAR_BIT
* TYPE_LENGTH (field_type
)
2931 || (field_type
->code () == TYPE_CODE_ENUM
2932 && FIELD_BITSIZE (fip
->list
->field
)
2933 == gdbarch_int_bit (gdbarch
))
2936 FIELD_BITPOS (fip
->list
->field
) % 8 == 0)
2938 FIELD_BITSIZE (fip
->list
->field
) = 0;
2944 /* Read struct or class data fields. They have the form:
2946 NAME : [VISIBILITY] TYPENUM , BITPOS , BITSIZE ;
2948 At the end, we see a semicolon instead of a field.
2950 In C++, this may wind up being NAME:?TYPENUM:PHYSNAME; for
2953 The optional VISIBILITY is one of:
2955 '/0' (VISIBILITY_PRIVATE)
2956 '/1' (VISIBILITY_PROTECTED)
2957 '/2' (VISIBILITY_PUBLIC)
2958 '/9' (VISIBILITY_IGNORE)
2960 or nothing, for C style fields with public visibility.
2962 Returns 1 for success, 0 for failure. */
2965 read_struct_fields (struct stab_field_info
*fip
, const char **pp
,
2966 struct type
*type
, struct objfile
*objfile
)
2969 struct nextfield
*newobj
;
2971 /* We better set p right now, in case there are no fields at all... */
2975 /* Read each data member type until we find the terminating ';' at the end of
2976 the data member list, or break for some other reason such as finding the
2977 start of the member function list. */
2978 /* Stab string for structure/union does not end with two ';' in
2979 SUN C compiler 5.3 i.e. F6U2, hence check for end of string. */
2981 while (**pp
!= ';' && **pp
!= '\0')
2983 STABS_CONTINUE (pp
, objfile
);
2984 /* Get space to record the next field's data. */
2985 newobj
= OBSTACK_ZALLOC (&fip
->obstack
, struct nextfield
);
2987 newobj
->next
= fip
->list
;
2990 /* Get the field name. */
2993 /* If is starts with CPLUS_MARKER it is a special abbreviation,
2994 unless the CPLUS_MARKER is followed by an underscore, in
2995 which case it is just the name of an anonymous type, which we
2996 should handle like any other type name. */
2998 if (is_cplus_marker (p
[0]) && p
[1] != '_')
3000 if (!read_cpp_abbrev (fip
, pp
, type
, objfile
))
3005 /* Look for the ':' that separates the field name from the field
3006 values. Data members are delimited by a single ':', while member
3007 functions are delimited by a pair of ':'s. When we hit the member
3008 functions (if any), terminate scan loop and return. */
3010 while (*p
!= ':' && *p
!= '\0')
3017 /* Check to see if we have hit the member functions yet. */
3022 read_one_struct_field (fip
, pp
, p
, type
, objfile
);
3024 if (p
[0] == ':' && p
[1] == ':')
3026 /* (the deleted) chill the list of fields: the last entry (at
3027 the head) is a partially constructed entry which we now
3029 fip
->list
= fip
->list
->next
;
3034 /* The stabs for C++ derived classes contain baseclass information which
3035 is marked by a '!' character after the total size. This function is
3036 called when we encounter the baseclass marker, and slurps up all the
3037 baseclass information.
3039 Immediately following the '!' marker is the number of base classes that
3040 the class is derived from, followed by information for each base class.
3041 For each base class, there are two visibility specifiers, a bit offset
3042 to the base class information within the derived class, a reference to
3043 the type for the base class, and a terminating semicolon.
3045 A typical example, with two base classes, would be "!2,020,19;0264,21;".
3047 Baseclass information marker __________________|| | | | | | |
3048 Number of baseclasses __________________________| | | | | | |
3049 Visibility specifiers (2) ________________________| | | | | |
3050 Offset in bits from start of class _________________| | | | |
3051 Type number for base class ___________________________| | | |
3052 Visibility specifiers (2) _______________________________| | |
3053 Offset in bits from start of class ________________________| |
3054 Type number of base class ____________________________________|
3056 Return 1 for success, 0 for (error-type-inducing) failure. */
3062 read_baseclasses (struct stab_field_info
*fip
, const char **pp
,
3063 struct type
*type
, struct objfile
*objfile
)
3066 struct nextfield
*newobj
;
3074 /* Skip the '!' baseclass information marker. */
3078 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
3082 TYPE_N_BASECLASSES (type
) = read_huge_number (pp
, ',', &nbits
, 0);
3088 /* Some stupid compilers have trouble with the following, so break
3089 it up into simpler expressions. */
3090 TYPE_FIELD_VIRTUAL_BITS (type
) = (B_TYPE
*)
3091 TYPE_ALLOC (type
, B_BYTES (TYPE_N_BASECLASSES (type
)));
3094 int num_bytes
= B_BYTES (TYPE_N_BASECLASSES (type
));
3097 pointer
= (char *) TYPE_ALLOC (type
, num_bytes
);
3098 TYPE_FIELD_VIRTUAL_BITS (type
) = (B_TYPE
*) pointer
;
3102 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type
), TYPE_N_BASECLASSES (type
));
3104 for (i
= 0; i
< TYPE_N_BASECLASSES (type
); i
++)
3106 newobj
= OBSTACK_ZALLOC (&fip
->obstack
, struct nextfield
);
3108 newobj
->next
= fip
->list
;
3110 FIELD_BITSIZE (newobj
->field
) = 0; /* This should be an unpacked
3113 STABS_CONTINUE (pp
, objfile
);
3117 /* Nothing to do. */
3120 SET_TYPE_FIELD_VIRTUAL (type
, i
);
3123 /* Unknown character. Complain and treat it as non-virtual. */
3125 complaint (_("Unknown virtual character `%c' for baseclass"),
3131 newobj
->visibility
= *(*pp
)++;
3132 switch (newobj
->visibility
)
3134 case VISIBILITY_PRIVATE
:
3135 case VISIBILITY_PROTECTED
:
3136 case VISIBILITY_PUBLIC
:
3139 /* Bad visibility format. Complain and treat it as
3142 complaint (_("Unknown visibility `%c' for baseclass"),
3143 newobj
->visibility
);
3144 newobj
->visibility
= VISIBILITY_PUBLIC
;
3151 /* The remaining value is the bit offset of the portion of the object
3152 corresponding to this baseclass. Always zero in the absence of
3153 multiple inheritance. */
3155 SET_FIELD_BITPOS (newobj
->field
, read_huge_number (pp
, ',', &nbits
, 0));
3160 /* The last piece of baseclass information is the type of the
3161 base class. Read it, and remember it's type name as this
3164 newobj
->field
.set_type (read_type (pp
, objfile
));
3165 newobj
->field
.name
= newobj
->field
.type ()->name ();
3167 /* Skip trailing ';' and bump count of number of fields seen. */
3176 /* The tail end of stabs for C++ classes that contain a virtual function
3177 pointer contains a tilde, a %, and a type number.
3178 The type number refers to the base class (possibly this class itself) which
3179 contains the vtable pointer for the current class.
3181 This function is called when we have parsed all the method declarations,
3182 so we can look for the vptr base class info. */
3185 read_tilde_fields (struct stab_field_info
*fip
, const char **pp
,
3186 struct type
*type
, struct objfile
*objfile
)
3190 STABS_CONTINUE (pp
, objfile
);
3192 /* If we are positioned at a ';', then skip it. */
3202 if (**pp
== '=' || **pp
== '+' || **pp
== '-')
3204 /* Obsolete flags that used to indicate the presence
3205 of constructors and/or destructors. */
3209 /* Read either a '%' or the final ';'. */
3210 if (*(*pp
)++ == '%')
3212 /* The next number is the type number of the base class
3213 (possibly our own class) which supplies the vtable for
3214 this class. Parse it out, and search that class to find
3215 its vtable pointer, and install those into TYPE_VPTR_BASETYPE
3216 and TYPE_VPTR_FIELDNO. */
3221 t
= read_type (pp
, objfile
);
3223 while (*p
!= '\0' && *p
!= ';')
3229 /* Premature end of symbol. */
3233 set_type_vptr_basetype (type
, t
);
3234 if (type
== t
) /* Our own class provides vtbl ptr. */
3236 for (i
= t
->num_fields () - 1;
3237 i
>= TYPE_N_BASECLASSES (t
);
3240 const char *name
= TYPE_FIELD_NAME (t
, i
);
3242 if (!strncmp (name
, vptr_name
, sizeof (vptr_name
) - 2)
3243 && is_cplus_marker (name
[sizeof (vptr_name
) - 2]))
3245 set_type_vptr_fieldno (type
, i
);
3249 /* Virtual function table field not found. */
3250 complaint (_("virtual function table pointer "
3251 "not found when defining class `%s'"),
3257 set_type_vptr_fieldno (type
, TYPE_VPTR_FIELDNO (t
));
3268 attach_fn_fields_to_type (struct stab_field_info
*fip
, struct type
*type
)
3272 for (n
= TYPE_NFN_FIELDS (type
);
3273 fip
->fnlist
!= NULL
;
3274 fip
->fnlist
= fip
->fnlist
->next
)
3276 --n
; /* Circumvent Sun3 compiler bug. */
3277 TYPE_FN_FIELDLISTS (type
)[n
] = fip
->fnlist
->fn_fieldlist
;
3282 /* Create the vector of fields, and record how big it is.
3283 We need this info to record proper virtual function table information
3284 for this class's virtual functions. */
3287 attach_fields_to_type (struct stab_field_info
*fip
, struct type
*type
,
3288 struct objfile
*objfile
)
3291 int non_public_fields
= 0;
3292 struct nextfield
*scan
;
3294 /* Count up the number of fields that we have, as well as taking note of
3295 whether or not there are any non-public fields, which requires us to
3296 allocate and build the private_field_bits and protected_field_bits
3299 for (scan
= fip
->list
; scan
!= NULL
; scan
= scan
->next
)
3302 if (scan
->visibility
!= VISIBILITY_PUBLIC
)
3304 non_public_fields
++;
3308 /* Now we know how many fields there are, and whether or not there are any
3309 non-public fields. Record the field count, allocate space for the
3310 array of fields, and create blank visibility bitfields if necessary. */
3312 type
->set_num_fields (nfields
);
3315 TYPE_ALLOC (type
, sizeof (struct field
) * nfields
));
3316 memset (type
->fields (), 0, sizeof (struct field
) * nfields
);
3318 if (non_public_fields
)
3320 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
3322 TYPE_FIELD_PRIVATE_BITS (type
) =
3323 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
3324 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type
), nfields
);
3326 TYPE_FIELD_PROTECTED_BITS (type
) =
3327 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
3328 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type
), nfields
);
3330 TYPE_FIELD_IGNORE_BITS (type
) =
3331 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
3332 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type
), nfields
);
3335 /* Copy the saved-up fields into the field vector. Start from the
3336 head of the list, adding to the tail of the field array, so that
3337 they end up in the same order in the array in which they were
3338 added to the list. */
3340 while (nfields
-- > 0)
3342 type
->field (nfields
) = fip
->list
->field
;
3343 switch (fip
->list
->visibility
)
3345 case VISIBILITY_PRIVATE
:
3346 SET_TYPE_FIELD_PRIVATE (type
, nfields
);
3349 case VISIBILITY_PROTECTED
:
3350 SET_TYPE_FIELD_PROTECTED (type
, nfields
);
3353 case VISIBILITY_IGNORE
:
3354 SET_TYPE_FIELD_IGNORE (type
, nfields
);
3357 case VISIBILITY_PUBLIC
:
3361 /* Unknown visibility. Complain and treat it as public. */
3363 complaint (_("Unknown visibility `%c' for field"),
3364 fip
->list
->visibility
);
3368 fip
->list
= fip
->list
->next
;
3374 /* Complain that the compiler has emitted more than one definition for the
3375 structure type TYPE. */
3377 complain_about_struct_wipeout (struct type
*type
)
3379 const char *name
= "";
3380 const char *kind
= "";
3384 name
= type
->name ();
3385 switch (type
->code ())
3387 case TYPE_CODE_STRUCT
: kind
= "struct "; break;
3388 case TYPE_CODE_UNION
: kind
= "union "; break;
3389 case TYPE_CODE_ENUM
: kind
= "enum "; break;
3399 complaint (_("struct/union type gets multiply defined: %s%s"), kind
, name
);
3402 /* Set the length for all variants of a same main_type, which are
3403 connected in the closed chain.
3405 This is something that needs to be done when a type is defined *after*
3406 some cross references to this type have already been read. Consider
3407 for instance the following scenario where we have the following two
3410 .stabs "t:p(0,21)=*(0,22)=k(0,23)=xsdummy:",160,0,28,-24
3411 .stabs "dummy:T(0,23)=s16x:(0,1),0,3[...]"
3413 A stubbed version of type dummy is created while processing the first
3414 stabs entry. The length of that type is initially set to zero, since
3415 it is unknown at this point. Also, a "constant" variation of type
3416 "dummy" is created as well (this is the "(0,22)=k(0,23)" section of
3419 The second stabs entry allows us to replace the stubbed definition
3420 with the real definition. However, we still need to adjust the length
3421 of the "constant" variation of that type, as its length was left
3422 untouched during the main type replacement... */
3425 set_length_in_type_chain (struct type
*type
)
3427 struct type
*ntype
= TYPE_CHAIN (type
);
3429 while (ntype
!= type
)
3431 if (TYPE_LENGTH(ntype
) == 0)
3432 TYPE_LENGTH (ntype
) = TYPE_LENGTH (type
);
3434 complain_about_struct_wipeout (ntype
);
3435 ntype
= TYPE_CHAIN (ntype
);
3439 /* Read the description of a structure (or union type) and return an object
3440 describing the type.
3442 PP points to a character pointer that points to the next unconsumed token
3443 in the stabs string. For example, given stabs "A:T4=s4a:1,0,32;;",
3444 *PP will point to "4a:1,0,32;;".
3446 TYPE points to an incomplete type that needs to be filled in.
3448 OBJFILE points to the current objfile from which the stabs information is
3449 being read. (Note that it is redundant in that TYPE also contains a pointer
3450 to this same objfile, so it might be a good idea to eliminate it. FIXME).
3453 static struct type
*
3454 read_struct_type (const char **pp
, struct type
*type
, enum type_code type_code
,
3455 struct objfile
*objfile
)
3457 struct stab_field_info fi
;
3459 /* When describing struct/union/class types in stabs, G++ always drops
3460 all qualifications from the name. So if you've got:
3461 struct A { ... struct B { ... }; ... };
3462 then G++ will emit stabs for `struct A::B' that call it simply
3463 `struct B'. Obviously, if you've got a real top-level definition for
3464 `struct B', or other nested definitions, this is going to cause
3467 Obviously, GDB can't fix this by itself, but it can at least avoid
3468 scribbling on existing structure type objects when new definitions
3470 if (! (type
->code () == TYPE_CODE_UNDEF
3471 || TYPE_STUB (type
)))
3473 complain_about_struct_wipeout (type
);
3475 /* It's probably best to return the type unchanged. */
3479 INIT_CPLUS_SPECIFIC (type
);
3480 type
->set_code (type_code
);
3481 TYPE_STUB (type
) = 0;
3483 /* First comes the total size in bytes. */
3488 TYPE_LENGTH (type
) = read_huge_number (pp
, 0, &nbits
, 0);
3490 return error_type (pp
, objfile
);
3491 set_length_in_type_chain (type
);
3494 /* Now read the baseclasses, if any, read the regular C struct or C++
3495 class member fields, attach the fields to the type, read the C++
3496 member functions, attach them to the type, and then read any tilde
3497 field (baseclass specifier for the class holding the main vtable). */
3499 if (!read_baseclasses (&fi
, pp
, type
, objfile
)
3500 || !read_struct_fields (&fi
, pp
, type
, objfile
)
3501 || !attach_fields_to_type (&fi
, type
, objfile
)
3502 || !read_member_functions (&fi
, pp
, type
, objfile
)
3503 || !attach_fn_fields_to_type (&fi
, type
)
3504 || !read_tilde_fields (&fi
, pp
, type
, objfile
))
3506 type
= error_type (pp
, objfile
);
3512 /* Read a definition of an array type,
3513 and create and return a suitable type object.
3514 Also creates a range type which represents the bounds of that
3517 static struct type
*
3518 read_array_type (const char **pp
, struct type
*type
,
3519 struct objfile
*objfile
)
3521 struct type
*index_type
, *element_type
, *range_type
;
3526 /* Format of an array type:
3527 "ar<index type>;lower;upper;<array_contents_type>".
3528 OS9000: "arlower,upper;<array_contents_type>".
3530 Fortran adjustable arrays use Adigits or Tdigits for lower or upper;
3531 for these, produce a type like float[][]. */
3534 index_type
= read_type (pp
, objfile
);
3536 /* Improper format of array type decl. */
3537 return error_type (pp
, objfile
);
3541 if (!(**pp
>= '0' && **pp
<= '9') && **pp
!= '-')
3546 lower
= read_huge_number (pp
, ';', &nbits
, 0);
3549 return error_type (pp
, objfile
);
3551 if (!(**pp
>= '0' && **pp
<= '9') && **pp
!= '-')
3556 upper
= read_huge_number (pp
, ';', &nbits
, 0);
3558 return error_type (pp
, objfile
);
3560 element_type
= read_type (pp
, objfile
);
3569 create_static_range_type (NULL
, index_type
, lower
, upper
);
3570 type
= create_array_type (type
, element_type
, range_type
);
3576 /* Read a definition of an enumeration type,
3577 and create and return a suitable type object.
3578 Also defines the symbols that represent the values of the type. */
3580 static struct type
*
3581 read_enum_type (const char **pp
, struct type
*type
,
3582 struct objfile
*objfile
)
3584 struct gdbarch
*gdbarch
= objfile
->arch ();
3590 struct pending
**symlist
;
3591 struct pending
*osyms
, *syms
;
3594 int unsigned_enum
= 1;
3597 /* FIXME! The stabs produced by Sun CC merrily define things that ought
3598 to be file-scope, between N_FN entries, using N_LSYM. What's a mother
3599 to do? For now, force all enum values to file scope. */
3600 if (within_function
)
3601 symlist
= get_local_symbols ();
3604 symlist
= get_file_symbols ();
3606 o_nsyms
= osyms
? osyms
->nsyms
: 0;
3608 /* The aix4 compiler emits an extra field before the enum members;
3609 my guess is it's a type of some sort. Just ignore it. */
3612 /* Skip over the type. */
3616 /* Skip over the colon. */
3620 /* Read the value-names and their values.
3621 The input syntax is NAME:VALUE,NAME:VALUE, and so on.
3622 A semicolon or comma instead of a NAME means the end. */
3623 while (**pp
&& **pp
!= ';' && **pp
!= ',')
3625 STABS_CONTINUE (pp
, objfile
);
3629 name
= obstack_strndup (&objfile
->objfile_obstack
, *pp
, p
- *pp
);
3631 n
= read_huge_number (pp
, ',', &nbits
, 0);
3633 return error_type (pp
, objfile
);
3635 sym
= new (&objfile
->objfile_obstack
) symbol
;
3636 sym
->set_linkage_name (name
);
3637 sym
->set_language (get_current_subfile ()->language
,
3638 &objfile
->objfile_obstack
);
3639 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST
;
3640 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
3641 SYMBOL_VALUE (sym
) = n
;
3644 add_symbol_to_list (sym
, symlist
);
3649 (*pp
)++; /* Skip the semicolon. */
3651 /* Now fill in the fields of the type-structure. */
3653 TYPE_LENGTH (type
) = gdbarch_int_bit (gdbarch
) / HOST_CHAR_BIT
;
3654 set_length_in_type_chain (type
);
3655 type
->set_code (TYPE_CODE_ENUM
);
3656 TYPE_STUB (type
) = 0;
3658 TYPE_UNSIGNED (type
) = 1;
3659 type
->set_num_fields (nsyms
);
3662 TYPE_ALLOC (type
, sizeof (struct field
) * nsyms
));
3663 memset (type
->fields (), 0, sizeof (struct field
) * nsyms
);
3665 /* Find the symbols for the values and put them into the type.
3666 The symbols can be found in the symlist that we put them on
3667 to cause them to be defined. osyms contains the old value
3668 of that symlist; everything up to there was defined by us. */
3669 /* Note that we preserve the order of the enum constants, so
3670 that in something like "enum {FOO, LAST_THING=FOO}" we print
3671 FOO, not LAST_THING. */
3673 for (syms
= *symlist
, n
= nsyms
- 1; syms
; syms
= syms
->next
)
3675 int last
= syms
== osyms
? o_nsyms
: 0;
3676 int j
= syms
->nsyms
;
3678 for (; --j
>= last
; --n
)
3680 struct symbol
*xsym
= syms
->symbol
[j
];
3682 SYMBOL_TYPE (xsym
) = type
;
3683 TYPE_FIELD_NAME (type
, n
) = xsym
->linkage_name ();
3684 SET_FIELD_ENUMVAL (type
->field (n
), SYMBOL_VALUE (xsym
));
3685 TYPE_FIELD_BITSIZE (type
, n
) = 0;
3694 /* Sun's ACC uses a somewhat saner method for specifying the builtin
3695 typedefs in every file (for int, long, etc):
3697 type = b <signed> <width> <format type>; <offset>; <nbits>
3699 optional format type = c or b for char or boolean.
3700 offset = offset from high order bit to start bit of type.
3701 width is # bytes in object of this type, nbits is # bits in type.
3703 The width/offset stuff appears to be for small objects stored in
3704 larger ones (e.g. `shorts' in `int' registers). We ignore it for now,
3707 static struct type
*
3708 read_sun_builtin_type (const char **pp
, int typenums
[2], struct objfile
*objfile
)
3713 int boolean_type
= 0;
3724 return error_type (pp
, objfile
);
3728 /* For some odd reason, all forms of char put a c here. This is strange
3729 because no other type has this honor. We can safely ignore this because
3730 we actually determine 'char'acterness by the number of bits specified in
3732 Boolean forms, e.g Fortran logical*X, put a b here. */
3736 else if (**pp
== 'b')
3742 /* The first number appears to be the number of bytes occupied
3743 by this type, except that unsigned short is 4 instead of 2.
3744 Since this information is redundant with the third number,
3745 we will ignore it. */
3746 read_huge_number (pp
, ';', &nbits
, 0);
3748 return error_type (pp
, objfile
);
3750 /* The second number is always 0, so ignore it too. */
3751 read_huge_number (pp
, ';', &nbits
, 0);
3753 return error_type (pp
, objfile
);
3755 /* The third number is the number of bits for this type. */
3756 type_bits
= read_huge_number (pp
, 0, &nbits
, 0);
3758 return error_type (pp
, objfile
);
3759 /* The type *should* end with a semicolon. If it are embedded
3760 in a larger type the semicolon may be the only way to know where
3761 the type ends. If this type is at the end of the stabstring we
3762 can deal with the omitted semicolon (but we don't have to like
3763 it). Don't bother to complain(), Sun's compiler omits the semicolon
3770 struct type
*type
= init_type (objfile
, TYPE_CODE_VOID
,
3771 TARGET_CHAR_BIT
, NULL
);
3773 TYPE_UNSIGNED (type
) = 1;
3778 return init_boolean_type (objfile
, type_bits
, unsigned_type
, NULL
);
3780 return init_integer_type (objfile
, type_bits
, unsigned_type
, NULL
);
3783 static struct type
*
3784 read_sun_floating_type (const char **pp
, int typenums
[2],
3785 struct objfile
*objfile
)
3790 struct type
*rettype
;
3792 /* The first number has more details about the type, for example
3794 details
= read_huge_number (pp
, ';', &nbits
, 0);
3796 return error_type (pp
, objfile
);
3798 /* The second number is the number of bytes occupied by this type. */
3799 nbytes
= read_huge_number (pp
, ';', &nbits
, 0);
3801 return error_type (pp
, objfile
);
3803 nbits
= nbytes
* TARGET_CHAR_BIT
;
3805 if (details
== NF_COMPLEX
|| details
== NF_COMPLEX16
3806 || details
== NF_COMPLEX32
)
3808 rettype
= dbx_init_float_type (objfile
, nbits
/ 2);
3809 return init_complex_type (NULL
, rettype
);
3812 return dbx_init_float_type (objfile
, nbits
);
3815 /* Read a number from the string pointed to by *PP.
3816 The value of *PP is advanced over the number.
3817 If END is nonzero, the character that ends the
3818 number must match END, or an error happens;
3819 and that character is skipped if it does match.
3820 If END is zero, *PP is left pointing to that character.
3822 If TWOS_COMPLEMENT_BITS is set to a strictly positive value and if
3823 the number is represented in an octal representation, assume that
3824 it is represented in a 2's complement representation with a size of
3825 TWOS_COMPLEMENT_BITS.
3827 If the number fits in a long, set *BITS to 0 and return the value.
3828 If not, set *BITS to be the number of bits in the number and return 0.
3830 If encounter garbage, set *BITS to -1 and return 0. */
3833 read_huge_number (const char **pp
, int end
, int *bits
,
3834 int twos_complement_bits
)
3836 const char *p
= *pp
;
3845 int twos_complement_representation
= 0;
3853 /* Leading zero means octal. GCC uses this to output values larger
3854 than an int (because that would be hard in decimal). */
3861 /* Skip extra zeros. */
3865 if (sign
> 0 && radix
== 8 && twos_complement_bits
> 0)
3867 /* Octal, possibly signed. Check if we have enough chars for a
3873 while ((c
= *p1
) >= '0' && c
< '8')
3877 if (len
> twos_complement_bits
/ 3
3878 || (twos_complement_bits
% 3 == 0
3879 && len
== twos_complement_bits
/ 3))
3881 /* Ok, we have enough characters for a signed value, check
3882 for signedness by testing if the sign bit is set. */
3883 sign_bit
= (twos_complement_bits
% 3 + 2) % 3;
3885 if (c
& (1 << sign_bit
))
3887 /* Definitely signed. */
3888 twos_complement_representation
= 1;
3894 upper_limit
= LONG_MAX
/ radix
;
3896 while ((c
= *p
++) >= '0' && c
< ('0' + radix
))
3898 if (n
<= upper_limit
)
3900 if (twos_complement_representation
)
3902 /* Octal, signed, twos complement representation. In
3903 this case, n is the corresponding absolute value. */
3906 long sn
= c
- '0' - ((2 * (c
- '0')) | (2 << sign_bit
));
3918 /* unsigned representation */
3920 n
+= c
- '0'; /* FIXME this overflows anyway. */
3926 /* This depends on large values being output in octal, which is
3933 /* Ignore leading zeroes. */
3937 else if (c
== '2' || c
== '3')
3958 if (radix
== 8 && twos_complement_bits
> 0 && nbits
> twos_complement_bits
)
3960 /* We were supposed to parse a number with maximum
3961 TWOS_COMPLEMENT_BITS bits, but something went wrong. */
3972 /* Large decimal constants are an error (because it is hard to
3973 count how many bits are in them). */
3979 /* -0x7f is the same as 0x80. So deal with it by adding one to
3980 the number of bits. Two's complement represention octals
3981 can't have a '-' in front. */
3982 if (sign
== -1 && !twos_complement_representation
)
3993 /* It's *BITS which has the interesting information. */
3997 static struct type
*
3998 read_range_type (const char **pp
, int typenums
[2], int type_size
,
3999 struct objfile
*objfile
)
4001 struct gdbarch
*gdbarch
= objfile
->arch ();
4002 const char *orig_pp
= *pp
;
4007 struct type
*result_type
;
4008 struct type
*index_type
= NULL
;
4010 /* First comes a type we are a subrange of.
4011 In C it is usually 0, 1 or the type being defined. */
4012 if (read_type_number (pp
, rangenums
) != 0)
4013 return error_type (pp
, objfile
);
4014 self_subrange
= (rangenums
[0] == typenums
[0] &&
4015 rangenums
[1] == typenums
[1]);
4020 index_type
= read_type (pp
, objfile
);
4023 /* A semicolon should now follow; skip it. */
4027 /* The remaining two operands are usually lower and upper bounds
4028 of the range. But in some special cases they mean something else. */
4029 n2
= read_huge_number (pp
, ';', &n2bits
, type_size
);
4030 n3
= read_huge_number (pp
, ';', &n3bits
, type_size
);
4032 if (n2bits
== -1 || n3bits
== -1)
4033 return error_type (pp
, objfile
);
4036 goto handle_true_range
;
4038 /* If limits are huge, must be large integral type. */
4039 if (n2bits
!= 0 || n3bits
!= 0)
4041 char got_signed
= 0;
4042 char got_unsigned
= 0;
4043 /* Number of bits in the type. */
4046 /* If a type size attribute has been specified, the bounds of
4047 the range should fit in this size. If the lower bounds needs
4048 more bits than the upper bound, then the type is signed. */
4049 if (n2bits
<= type_size
&& n3bits
<= type_size
)
4051 if (n2bits
== type_size
&& n2bits
> n3bits
)
4057 /* Range from 0 to <large number> is an unsigned large integral type. */
4058 else if ((n2bits
== 0 && n2
== 0) && n3bits
!= 0)
4063 /* Range from <large number> to <large number>-1 is a large signed
4064 integral type. Take care of the case where <large number> doesn't
4065 fit in a long but <large number>-1 does. */
4066 else if ((n2bits
!= 0 && n3bits
!= 0 && n2bits
== n3bits
+ 1)
4067 || (n2bits
!= 0 && n3bits
== 0
4068 && (n2bits
== sizeof (long) * HOST_CHAR_BIT
)
4075 if (got_signed
|| got_unsigned
)
4076 return init_integer_type (objfile
, nbits
, got_unsigned
, NULL
);
4078 return error_type (pp
, objfile
);
4081 /* A type defined as a subrange of itself, with bounds both 0, is void. */
4082 if (self_subrange
&& n2
== 0 && n3
== 0)
4083 return init_type (objfile
, TYPE_CODE_VOID
, TARGET_CHAR_BIT
, NULL
);
4085 /* If n3 is zero and n2 is positive, we want a floating type, and n2
4086 is the width in bytes.
4088 Fortran programs appear to use this for complex types also. To
4089 distinguish between floats and complex, g77 (and others?) seem
4090 to use self-subranges for the complexes, and subranges of int for
4093 Also note that for complexes, g77 sets n2 to the size of one of
4094 the member floats, not the whole complex beast. My guess is that
4095 this was to work well with pre-COMPLEX versions of gdb. */
4097 if (n3
== 0 && n2
> 0)
4099 struct type
*float_type
4100 = dbx_init_float_type (objfile
, n2
* TARGET_CHAR_BIT
);
4103 return init_complex_type (NULL
, float_type
);
4108 /* If the upper bound is -1, it must really be an unsigned integral. */
4110 else if (n2
== 0 && n3
== -1)
4112 int bits
= type_size
;
4116 /* We don't know its size. It is unsigned int or unsigned
4117 long. GCC 2.3.3 uses this for long long too, but that is
4118 just a GDB 3.5 compatibility hack. */
4119 bits
= gdbarch_int_bit (gdbarch
);
4122 return init_integer_type (objfile
, bits
, 1, NULL
);
4125 /* Special case: char is defined (Who knows why) as a subrange of
4126 itself with range 0-127. */
4127 else if (self_subrange
&& n2
== 0 && n3
== 127)
4129 struct type
*type
= init_integer_type (objfile
, TARGET_CHAR_BIT
,
4131 TYPE_NOSIGN (type
) = 1;
4134 /* We used to do this only for subrange of self or subrange of int. */
4137 /* -1 is used for the upper bound of (4 byte) "unsigned int" and
4138 "unsigned long", and we already checked for that,
4139 so don't need to test for it here. */
4142 /* n3 actually gives the size. */
4143 return init_integer_type (objfile
, -n3
* TARGET_CHAR_BIT
, 1, NULL
);
4145 /* Is n3 == 2**(8n)-1 for some integer n? Then it's an
4146 unsigned n-byte integer. But do require n to be a power of
4147 two; we don't want 3- and 5-byte integers flying around. */
4153 for (bytes
= 0; (bits
& 0xff) == 0xff; bytes
++)
4156 && ((bytes
- 1) & bytes
) == 0) /* "bytes is a power of two" */
4157 return init_integer_type (objfile
, bytes
* TARGET_CHAR_BIT
, 1, NULL
);
4160 /* I think this is for Convex "long long". Since I don't know whether
4161 Convex sets self_subrange, I also accept that particular size regardless
4162 of self_subrange. */
4163 else if (n3
== 0 && n2
< 0
4165 || n2
== -gdbarch_long_long_bit
4166 (gdbarch
) / TARGET_CHAR_BIT
))
4167 return init_integer_type (objfile
, -n2
* TARGET_CHAR_BIT
, 0, NULL
);
4168 else if (n2
== -n3
- 1)
4171 return init_integer_type (objfile
, 8, 0, NULL
);
4173 return init_integer_type (objfile
, 16, 0, NULL
);
4174 if (n3
== 0x7fffffff)
4175 return init_integer_type (objfile
, 32, 0, NULL
);
4178 /* We have a real range type on our hands. Allocate space and
4179 return a real pointer. */
4183 index_type
= objfile_type (objfile
)->builtin_int
;
4185 index_type
= *dbx_lookup_type (rangenums
, objfile
);
4186 if (index_type
== NULL
)
4188 /* Does this actually ever happen? Is that why we are worrying
4189 about dealing with it rather than just calling error_type? */
4191 complaint (_("base type %d of range type is not defined"), rangenums
[1]);
4193 index_type
= objfile_type (objfile
)->builtin_int
;
4197 = create_static_range_type (NULL
, index_type
, n2
, n3
);
4198 return (result_type
);
4201 /* Read in an argument list. This is a list of types, separated by commas
4202 and terminated with END. Return the list of types read in, or NULL
4203 if there is an error. */
4205 static struct field
*
4206 read_args (const char **pp
, int end
, struct objfile
*objfile
, int *nargsp
,
4209 /* FIXME! Remove this arbitrary limit! */
4210 struct type
*types
[1024]; /* Allow for fns of 1023 parameters. */
4217 /* Invalid argument list: no ','. */
4220 STABS_CONTINUE (pp
, objfile
);
4221 types
[n
++] = read_type (pp
, objfile
);
4223 (*pp
)++; /* get past `end' (the ':' character). */
4227 /* We should read at least the THIS parameter here. Some broken stabs
4228 output contained `(0,41),(0,42)=@s8;-16;,(0,43),(0,1);' where should
4229 have been present ";-16,(0,43)" reference instead. This way the
4230 excessive ";" marker prematurely stops the parameters parsing. */
4232 complaint (_("Invalid (empty) method arguments"));
4235 else if (types
[n
- 1]->code () != TYPE_CODE_VOID
)
4243 rval
= XCNEWVEC (struct field
, n
);
4244 for (i
= 0; i
< n
; i
++)
4245 rval
[i
].set_type (types
[i
]);
4250 /* Common block handling. */
4252 /* List of symbols declared since the last BCOMM. This list is a tail
4253 of local_symbols. When ECOMM is seen, the symbols on the list
4254 are noted so their proper addresses can be filled in later,
4255 using the common block base address gotten from the assembler
4258 static struct pending
*common_block
;
4259 static int common_block_i
;
4261 /* Name of the current common block. We get it from the BCOMM instead of the
4262 ECOMM to match IBM documentation (even though IBM puts the name both places
4263 like everyone else). */
4264 static char *common_block_name
;
4266 /* Process a N_BCOMM symbol. The storage for NAME is not guaranteed
4267 to remain after this function returns. */
4270 common_block_start (const char *name
, struct objfile
*objfile
)
4272 if (common_block_name
!= NULL
)
4274 complaint (_("Invalid symbol data: common block within common block"));
4276 common_block
= *get_local_symbols ();
4277 common_block_i
= common_block
? common_block
->nsyms
: 0;
4278 common_block_name
= obstack_strdup (&objfile
->objfile_obstack
, name
);
4281 /* Process a N_ECOMM symbol. */
4284 common_block_end (struct objfile
*objfile
)
4286 /* Symbols declared since the BCOMM are to have the common block
4287 start address added in when we know it. common_block and
4288 common_block_i point to the first symbol after the BCOMM in
4289 the local_symbols list; copy the list and hang it off the
4290 symbol for the common block name for later fixup. */
4293 struct pending
*newobj
= 0;
4294 struct pending
*next
;
4297 if (common_block_name
== NULL
)
4299 complaint (_("ECOMM symbol unmatched by BCOMM"));
4303 sym
= new (&objfile
->objfile_obstack
) symbol
;
4304 /* Note: common_block_name already saved on objfile_obstack. */
4305 sym
->set_linkage_name (common_block_name
);
4306 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
4308 /* Now we copy all the symbols which have been defined since the BCOMM. */
4310 /* Copy all the struct pendings before common_block. */
4311 for (next
= *get_local_symbols ();
4312 next
!= NULL
&& next
!= common_block
;
4315 for (j
= 0; j
< next
->nsyms
; j
++)
4316 add_symbol_to_list (next
->symbol
[j
], &newobj
);
4319 /* Copy however much of COMMON_BLOCK we need. If COMMON_BLOCK is
4320 NULL, it means copy all the local symbols (which we already did
4323 if (common_block
!= NULL
)
4324 for (j
= common_block_i
; j
< common_block
->nsyms
; j
++)
4325 add_symbol_to_list (common_block
->symbol
[j
], &newobj
);
4327 SYMBOL_TYPE (sym
) = (struct type
*) newobj
;
4329 /* Should we be putting local_symbols back to what it was?
4332 i
= hashname (sym
->linkage_name ());
4333 SYMBOL_VALUE_CHAIN (sym
) = global_sym_chain
[i
];
4334 global_sym_chain
[i
] = sym
;
4335 common_block_name
= NULL
;
4338 /* Add a common block's start address to the offset of each symbol
4339 declared to be in it (by being between a BCOMM/ECOMM pair that uses
4340 the common block name). */
4343 fix_common_block (struct symbol
*sym
, CORE_ADDR valu
)
4345 struct pending
*next
= (struct pending
*) SYMBOL_TYPE (sym
);
4347 for (; next
; next
= next
->next
)
4351 for (j
= next
->nsyms
- 1; j
>= 0; j
--)
4352 SET_SYMBOL_VALUE_ADDRESS (next
->symbol
[j
],
4353 SYMBOL_VALUE_ADDRESS (next
->symbol
[j
])
4360 /* Add {TYPE, TYPENUMS} to the NONAME_UNDEFS vector.
4361 See add_undefined_type for more details. */
4364 add_undefined_type_noname (struct type
*type
, int typenums
[2])
4368 nat
.typenums
[0] = typenums
[0];
4369 nat
.typenums
[1] = typenums
[1];
4372 if (noname_undefs_length
== noname_undefs_allocated
)
4374 noname_undefs_allocated
*= 2;
4375 noname_undefs
= (struct nat
*)
4376 xrealloc ((char *) noname_undefs
,
4377 noname_undefs_allocated
* sizeof (struct nat
));
4379 noname_undefs
[noname_undefs_length
++] = nat
;
4382 /* Add TYPE to the UNDEF_TYPES vector.
4383 See add_undefined_type for more details. */
4386 add_undefined_type_1 (struct type
*type
)
4388 if (undef_types_length
== undef_types_allocated
)
4390 undef_types_allocated
*= 2;
4391 undef_types
= (struct type
**)
4392 xrealloc ((char *) undef_types
,
4393 undef_types_allocated
* sizeof (struct type
*));
4395 undef_types
[undef_types_length
++] = type
;
4398 /* What about types defined as forward references inside of a small lexical
4400 /* Add a type to the list of undefined types to be checked through
4401 once this file has been read in.
4403 In practice, we actually maintain two such lists: The first list
4404 (UNDEF_TYPES) is used for types whose name has been provided, and
4405 concerns forward references (eg 'xs' or 'xu' forward references);
4406 the second list (NONAME_UNDEFS) is used for types whose name is
4407 unknown at creation time, because they were referenced through
4408 their type number before the actual type was declared.
4409 This function actually adds the given type to the proper list. */
4412 add_undefined_type (struct type
*type
, int typenums
[2])
4414 if (type
->name () == NULL
)
4415 add_undefined_type_noname (type
, typenums
);
4417 add_undefined_type_1 (type
);
4420 /* Try to fix all undefined types pushed on the UNDEF_TYPES vector. */
4423 cleanup_undefined_types_noname (struct objfile
*objfile
)
4427 for (i
= 0; i
< noname_undefs_length
; i
++)
4429 struct nat nat
= noname_undefs
[i
];
4432 type
= dbx_lookup_type (nat
.typenums
, objfile
);
4433 if (nat
.type
!= *type
&& (*type
)->code () != TYPE_CODE_UNDEF
)
4435 /* The instance flags of the undefined type are still unset,
4436 and needs to be copied over from the reference type.
4437 Since replace_type expects them to be identical, we need
4438 to set these flags manually before hand. */
4439 TYPE_INSTANCE_FLAGS (nat
.type
) = TYPE_INSTANCE_FLAGS (*type
);
4440 replace_type (nat
.type
, *type
);
4444 noname_undefs_length
= 0;
4447 /* Go through each undefined type, see if it's still undefined, and fix it
4448 up if possible. We have two kinds of undefined types:
4450 TYPE_CODE_ARRAY: Array whose target type wasn't defined yet.
4451 Fix: update array length using the element bounds
4452 and the target type's length.
4453 TYPE_CODE_STRUCT, TYPE_CODE_UNION: Structure whose fields were not
4454 yet defined at the time a pointer to it was made.
4455 Fix: Do a full lookup on the struct/union tag. */
4458 cleanup_undefined_types_1 (void)
4462 /* Iterate over every undefined type, and look for a symbol whose type
4463 matches our undefined type. The symbol matches if:
4464 1. It is a typedef in the STRUCT domain;
4465 2. It has the same name, and same type code;
4466 3. The instance flags are identical.
4468 It is important to check the instance flags, because we have seen
4469 examples where the debug info contained definitions such as:
4471 "foo_t:t30=B31=xefoo_t:"
4473 In this case, we have created an undefined type named "foo_t" whose
4474 instance flags is null (when processing "xefoo_t"), and then created
4475 another type with the same name, but with different instance flags
4476 ('B' means volatile). I think that the definition above is wrong,
4477 since the same type cannot be volatile and non-volatile at the same
4478 time, but we need to be able to cope with it when it happens. The
4479 approach taken here is to treat these two types as different. */
4481 for (type
= undef_types
; type
< undef_types
+ undef_types_length
; type
++)
4483 switch ((*type
)->code ())
4486 case TYPE_CODE_STRUCT
:
4487 case TYPE_CODE_UNION
:
4488 case TYPE_CODE_ENUM
:
4490 /* Check if it has been defined since. Need to do this here
4491 as well as in check_typedef to deal with the (legitimate in
4492 C though not C++) case of several types with the same name
4493 in different source files. */
4494 if (TYPE_STUB (*type
))
4496 struct pending
*ppt
;
4498 /* Name of the type, without "struct" or "union". */
4499 const char *type_name
= (*type
)->name ();
4501 if (type_name
== NULL
)
4503 complaint (_("need a type name"));
4506 for (ppt
= *get_file_symbols (); ppt
; ppt
= ppt
->next
)
4508 for (i
= 0; i
< ppt
->nsyms
; i
++)
4510 struct symbol
*sym
= ppt
->symbol
[i
];
4512 if (SYMBOL_CLASS (sym
) == LOC_TYPEDEF
4513 && SYMBOL_DOMAIN (sym
) == STRUCT_DOMAIN
4514 && (SYMBOL_TYPE (sym
)->code () ==
4516 && (TYPE_INSTANCE_FLAGS (*type
) ==
4517 TYPE_INSTANCE_FLAGS (SYMBOL_TYPE (sym
)))
4518 && strcmp (sym
->linkage_name (), type_name
) == 0)
4519 replace_type (*type
, SYMBOL_TYPE (sym
));
4528 complaint (_("forward-referenced types left unresolved, "
4536 undef_types_length
= 0;
4539 /* Try to fix all the undefined types we encountered while processing
4543 cleanup_undefined_stabs_types (struct objfile
*objfile
)
4545 cleanup_undefined_types_1 ();
4546 cleanup_undefined_types_noname (objfile
);
4549 /* See stabsread.h. */
4552 scan_file_globals (struct objfile
*objfile
)
4555 struct symbol
*sym
, *prev
;
4556 struct objfile
*resolve_objfile
;
4558 /* SVR4 based linkers copy referenced global symbols from shared
4559 libraries to the main executable.
4560 If we are scanning the symbols for a shared library, try to resolve
4561 them from the minimal symbols of the main executable first. */
4563 if (symfile_objfile
&& objfile
!= symfile_objfile
)
4564 resolve_objfile
= symfile_objfile
;
4566 resolve_objfile
= objfile
;
4570 /* Avoid expensive loop through all minimal symbols if there are
4571 no unresolved symbols. */
4572 for (hash
= 0; hash
< HASHSIZE
; hash
++)
4574 if (global_sym_chain
[hash
])
4577 if (hash
>= HASHSIZE
)
4580 for (minimal_symbol
*msymbol
: resolve_objfile
->msymbols ())
4584 /* Skip static symbols. */
4585 switch (MSYMBOL_TYPE (msymbol
))
4597 /* Get the hash index and check all the symbols
4598 under that hash index. */
4600 hash
= hashname (msymbol
->linkage_name ());
4602 for (sym
= global_sym_chain
[hash
]; sym
;)
4604 if (strcmp (msymbol
->linkage_name (), sym
->linkage_name ()) == 0)
4606 /* Splice this symbol out of the hash chain and
4607 assign the value we have to it. */
4610 SYMBOL_VALUE_CHAIN (prev
) = SYMBOL_VALUE_CHAIN (sym
);
4614 global_sym_chain
[hash
] = SYMBOL_VALUE_CHAIN (sym
);
4617 /* Check to see whether we need to fix up a common block. */
4618 /* Note: this code might be executed several times for
4619 the same symbol if there are multiple references. */
4622 if (SYMBOL_CLASS (sym
) == LOC_BLOCK
)
4624 fix_common_block (sym
,
4625 MSYMBOL_VALUE_ADDRESS (resolve_objfile
,
4630 SET_SYMBOL_VALUE_ADDRESS
4631 (sym
, MSYMBOL_VALUE_ADDRESS (resolve_objfile
,
4634 SYMBOL_SECTION (sym
) = MSYMBOL_SECTION (msymbol
);
4639 sym
= SYMBOL_VALUE_CHAIN (prev
);
4643 sym
= global_sym_chain
[hash
];
4649 sym
= SYMBOL_VALUE_CHAIN (sym
);
4653 if (resolve_objfile
== objfile
)
4655 resolve_objfile
= objfile
;
4658 /* Change the storage class of any remaining unresolved globals to
4659 LOC_UNRESOLVED and remove them from the chain. */
4660 for (hash
= 0; hash
< HASHSIZE
; hash
++)
4662 sym
= global_sym_chain
[hash
];
4666 sym
= SYMBOL_VALUE_CHAIN (sym
);
4668 /* Change the symbol address from the misleading chain value
4670 SET_SYMBOL_VALUE_ADDRESS (prev
, 0);
4672 /* Complain about unresolved common block symbols. */
4673 if (SYMBOL_CLASS (prev
) == LOC_STATIC
)
4674 SYMBOL_ACLASS_INDEX (prev
) = LOC_UNRESOLVED
;
4676 complaint (_("%s: common block `%s' from "
4677 "global_sym_chain unresolved"),
4678 objfile_name (objfile
), prev
->print_name ());
4681 memset (global_sym_chain
, 0, sizeof (global_sym_chain
));
4684 /* Initialize anything that needs initializing when starting to read
4685 a fresh piece of a symbol file, e.g. reading in the stuff corresponding
4689 stabsread_init (void)
4693 /* Initialize anything that needs initializing when a completely new
4694 symbol file is specified (not just adding some symbols from another
4695 file, e.g. a shared library). */
4698 stabsread_new_init (void)
4700 /* Empty the hash table of global syms looking for values. */
4701 memset (global_sym_chain
, 0, sizeof (global_sym_chain
));
4704 /* Initialize anything that needs initializing at the same time as
4705 start_symtab() is called. */
4710 global_stabs
= NULL
; /* AIX COFF */
4711 /* Leave FILENUM of 0 free for builtin types and this file's types. */
4712 n_this_object_header_files
= 1;
4713 type_vector_length
= 0;
4714 type_vector
= (struct type
**) 0;
4715 within_function
= 0;
4717 /* FIXME: If common_block_name is not already NULL, we should complain(). */
4718 common_block_name
= NULL
;
4721 /* Call after end_symtab(). */
4728 xfree (type_vector
);
4731 type_vector_length
= 0;
4732 previous_stab_code
= 0;
4736 finish_global_stabs (struct objfile
*objfile
)
4740 patch_block_stabs (*get_global_symbols (), global_stabs
, objfile
);
4741 xfree (global_stabs
);
4742 global_stabs
= NULL
;
4746 /* Find the end of the name, delimited by a ':', but don't match
4747 ObjC symbols which look like -[Foo bar::]:bla. */
4749 find_name_end (const char *name
)
4751 const char *s
= name
;
4753 if (s
[0] == '-' || *s
== '+')
4755 /* Must be an ObjC method symbol. */
4758 error (_("invalid symbol name \"%s\""), name
);
4760 s
= strchr (s
, ']');
4763 error (_("invalid symbol name \"%s\""), name
);
4765 return strchr (s
, ':');
4769 return strchr (s
, ':');
4773 /* See stabsread.h. */
4776 hashname (const char *name
)
4778 return fast_hash (name
, strlen (name
)) % HASHSIZE
;
4781 /* Initializer for this module. */
4783 void _initialize_stabsread ();
4785 _initialize_stabsread ()
4787 undef_types_allocated
= 20;
4788 undef_types_length
= 0;
4789 undef_types
= XNEWVEC (struct type
*, undef_types_allocated
);
4791 noname_undefs_allocated
= 20;
4792 noname_undefs_length
= 0;
4793 noname_undefs
= XNEWVEC (struct nat
, noname_undefs_allocated
);
4795 stab_register_index
= register_symbol_register_impl (LOC_REGISTER
,
4796 &stab_register_funcs
);
4797 stab_regparm_index
= register_symbol_register_impl (LOC_REGPARM_ADDR
,
4798 &stab_register_funcs
);