1 /* Support routines for decoding "stabs" debugging information format.
3 Copyright (C) 1986-2023 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 "gdbsupport/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
;
64 struct stabs_nextfield
66 struct stabs_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 stabs_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 sym
->set_domain (VAR_DOMAIN
);
428 sym
->set_aclass_index (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 sym
->set_type (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 sym
->set_type (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
, sym
->value_longest ());
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 sym
->set_line (desc
);
700 sym
->set_line (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 complaint (_("Unknown C++ symbol name `%s'"),
729 goto normal
; /* Do *something* with it. */
735 gdb::unique_xmalloc_ptr
<char> new_name
;
737 if (sym
->language () == language_cplus
)
739 std::string
name (string
, p
- string
);
740 new_name
= cp_canonicalize_string (name
.c_str ());
742 else if (sym
->language () == language_c
)
744 std::string
name (string
, p
- string
);
745 new_name
= c_canonicalize_name (name
.c_str ());
747 if (new_name
!= nullptr)
748 sym
->compute_and_set_names (new_name
.get (), true, objfile
->per_bfd
);
750 sym
->compute_and_set_names (gdb::string_view (string
, p
- string
), true,
753 if (sym
->language () == language_cplus
)
754 cp_scan_for_anonymous_namespaces (get_buildsym_compunit (), sym
,
760 /* Determine the type of name being defined. */
762 /* Getting GDB to correctly skip the symbol on an undefined symbol
763 descriptor and not ever dump core is a very dodgy proposition if
764 we do things this way. I say the acorn RISC machine can just
765 fix their compiler. */
766 /* The Acorn RISC machine's compiler can put out locals that don't
767 start with "234=" or "(3,4)=", so assume anything other than the
768 deftypes we know how to handle is a local. */
769 if (!strchr ("cfFGpPrStTvVXCR", *p
))
771 if (isdigit (*p
) || *p
== '(' || *p
== '-')
780 /* c is a special case, not followed by a type-number.
781 SYMBOL:c=iVALUE for an integer constant symbol.
782 SYMBOL:c=rVALUE for a floating constant symbol.
783 SYMBOL:c=eTYPE,INTVALUE for an enum constant symbol.
784 e.g. "b:c=e6,0" for "const b = blob1"
785 (where type 6 is defined by "blobs:t6=eblob1:0,blob2:1,;"). */
788 sym
->set_aclass_index (LOC_CONST
);
789 sym
->set_type (error_type (&p
, objfile
));
790 sym
->set_domain (VAR_DOMAIN
);
791 add_symbol_to_list (sym
, get_file_symbols ());
800 struct type
*dbl_type
;
802 dbl_type
= objfile_type (objfile
)->builtin_double
;
804 = (gdb_byte
*) obstack_alloc (&objfile
->objfile_obstack
,
805 dbl_type
->length ());
807 target_float_from_string (dbl_valu
, dbl_type
, std::string (p
));
809 sym
->set_type (dbl_type
);
810 sym
->set_value_bytes (dbl_valu
);
811 sym
->set_aclass_index (LOC_CONST_BYTES
);
816 /* Defining integer constants this way is kind of silly,
817 since 'e' constants allows the compiler to give not
818 only the value, but the type as well. C has at least
819 int, long, unsigned int, and long long as constant
820 types; other languages probably should have at least
821 unsigned as well as signed constants. */
823 sym
->set_type (objfile_type (objfile
)->builtin_long
);
824 sym
->set_value_longest (atoi (p
));
825 sym
->set_aclass_index (LOC_CONST
);
831 sym
->set_type (objfile_type (objfile
)->builtin_char
);
832 sym
->set_value_longest (atoi (p
));
833 sym
->set_aclass_index (LOC_CONST
);
839 struct type
*range_type
;
842 gdb_byte
*string_local
= (gdb_byte
*) alloca (strlen (p
));
843 gdb_byte
*string_value
;
845 if (quote
!= '\'' && quote
!= '"')
847 sym
->set_aclass_index (LOC_CONST
);
848 sym
->set_type (error_type (&p
, objfile
));
849 sym
->set_domain (VAR_DOMAIN
);
850 add_symbol_to_list (sym
, get_file_symbols ());
854 /* Find matching quote, rejecting escaped quotes. */
855 while (*p
&& *p
!= quote
)
857 if (*p
== '\\' && p
[1] == quote
)
859 string_local
[ind
] = (gdb_byte
) quote
;
865 string_local
[ind
] = (gdb_byte
) (*p
);
872 sym
->set_aclass_index (LOC_CONST
);
873 sym
->set_type (error_type (&p
, objfile
));
874 sym
->set_domain (VAR_DOMAIN
);
875 add_symbol_to_list (sym
, get_file_symbols ());
879 /* NULL terminate the string. */
880 string_local
[ind
] = 0;
882 = create_static_range_type (NULL
,
883 objfile_type (objfile
)->builtin_int
,
886 (create_array_type (NULL
, objfile_type (objfile
)->builtin_char
,
889 = (gdb_byte
*) obstack_alloc (&objfile
->objfile_obstack
, ind
+ 1);
890 memcpy (string_value
, string_local
, ind
+ 1);
893 sym
->set_value_bytes (string_value
);
894 sym
->set_aclass_index (LOC_CONST_BYTES
);
899 /* SYMBOL:c=eTYPE,INTVALUE for a constant symbol whose value
900 can be represented as integral.
901 e.g. "b:c=e6,0" for "const b = blob1"
902 (where type 6 is defined by "blobs:t6=eblob1:0,blob2:1,;"). */
904 sym
->set_aclass_index (LOC_CONST
);
905 sym
->set_type (read_type (&p
, objfile
));
909 sym
->set_type (error_type (&p
, objfile
));
914 /* If the value is too big to fit in an int (perhaps because
915 it is unsigned), or something like that, we silently get
916 a bogus value. The type and everything else about it is
917 correct. Ideally, we should be using whatever we have
918 available for parsing unsigned and long long values,
920 sym
->set_value_longest (atoi (p
));
925 sym
->set_aclass_index (LOC_CONST
);
926 sym
->set_type (error_type (&p
, objfile
));
929 sym
->set_domain (VAR_DOMAIN
);
930 add_symbol_to_list (sym
, get_file_symbols ());
934 /* The name of a caught exception. */
935 sym
->set_type (read_type (&p
, objfile
));
936 sym
->set_aclass_index (LOC_LABEL
);
937 sym
->set_domain (VAR_DOMAIN
);
938 sym
->set_value_address (valu
);
939 add_symbol_to_list (sym
, get_local_symbols ());
943 /* A static function definition. */
944 sym
->set_type (read_type (&p
, objfile
));
945 sym
->set_aclass_index (LOC_BLOCK
);
946 sym
->set_domain (VAR_DOMAIN
);
947 add_symbol_to_list (sym
, get_file_symbols ());
948 /* fall into process_function_types. */
950 process_function_types
:
951 /* Function result types are described as the result type in stabs.
952 We need to convert this to the function-returning-type-X type
953 in GDB. E.g. "int" is converted to "function returning int". */
954 if (sym
->type ()->code () != TYPE_CODE_FUNC
)
955 sym
->set_type (lookup_function_type (sym
->type ()));
957 /* All functions in C++ have prototypes. Stabs does not offer an
958 explicit way to identify prototyped or unprototyped functions,
959 but both GCC and Sun CC emit stabs for the "call-as" type rather
960 than the "declared-as" type for unprototyped functions, so
961 we treat all functions as if they were prototyped. This is used
962 primarily for promotion when calling the function from GDB. */
963 sym
->type ()->set_is_prototyped (true);
965 /* fall into process_prototype_types. */
967 process_prototype_types
:
968 /* Sun acc puts declared types of arguments here. */
971 struct type
*ftype
= sym
->type ();
976 /* Obtain a worst case guess for the number of arguments
977 by counting the semicolons. */
984 /* Allocate parameter information fields and fill them in. */
987 TYPE_ALLOC (ftype
, nsemi
* sizeof (struct field
)));
992 /* A type number of zero indicates the start of varargs.
993 FIXME: GDB currently ignores vararg functions. */
994 if (p
[0] == '0' && p
[1] == '\0')
996 ptype
= read_type (&p
, objfile
);
998 /* The Sun compilers mark integer arguments, which should
999 be promoted to the width of the calling conventions, with
1000 a type which references itself. This type is turned into
1001 a TYPE_CODE_VOID type by read_type, and we have to turn
1002 it back into builtin_int here.
1003 FIXME: Do we need a new builtin_promoted_int_arg ? */
1004 if (ptype
->code () == TYPE_CODE_VOID
)
1005 ptype
= objfile_type (objfile
)->builtin_int
;
1006 ftype
->field (nparams
).set_type (ptype
);
1007 TYPE_FIELD_ARTIFICIAL (ftype
, nparams
++) = 0;
1009 ftype
->set_num_fields (nparams
);
1010 ftype
->set_is_prototyped (true);
1015 /* A global function definition. */
1016 sym
->set_type (read_type (&p
, objfile
));
1017 sym
->set_aclass_index (LOC_BLOCK
);
1018 sym
->set_domain (VAR_DOMAIN
);
1019 add_symbol_to_list (sym
, get_global_symbols ());
1020 goto process_function_types
;
1023 /* For a class G (global) symbol, it appears that the
1024 value is not correct. It is necessary to search for the
1025 corresponding linker definition to find the value.
1026 These definitions appear at the end of the namelist. */
1027 sym
->set_type (read_type (&p
, objfile
));
1028 sym
->set_aclass_index (LOC_STATIC
);
1029 sym
->set_domain (VAR_DOMAIN
);
1030 /* Don't add symbol references to global_sym_chain.
1031 Symbol references don't have valid names and wont't match up with
1032 minimal symbols when the global_sym_chain is relocated.
1033 We'll fixup symbol references when we fixup the defining symbol. */
1034 if (sym
->linkage_name () && sym
->linkage_name ()[0] != '#')
1036 i
= hashname (sym
->linkage_name ());
1037 sym
->set_value_chain (global_sym_chain
[i
]);
1038 global_sym_chain
[i
] = sym
;
1040 add_symbol_to_list (sym
, get_global_symbols ());
1043 /* This case is faked by a conditional above,
1044 when there is no code letter in the dbx data.
1045 Dbx data never actually contains 'l'. */
1048 sym
->set_type (read_type (&p
, objfile
));
1049 sym
->set_aclass_index (LOC_LOCAL
);
1050 sym
->set_value_longest (valu
);
1051 sym
->set_domain (VAR_DOMAIN
);
1052 add_symbol_to_list (sym
, get_local_symbols ());
1057 /* pF is a two-letter code that means a function parameter in Fortran.
1058 The type-number specifies the type of the return value.
1059 Translate it into a pointer-to-function type. */
1063 (lookup_pointer_type
1064 (lookup_function_type (read_type (&p
, objfile
))));
1067 sym
->set_type (read_type (&p
, objfile
));
1069 sym
->set_aclass_index (LOC_ARG
);
1070 sym
->set_value_longest (valu
);
1071 sym
->set_domain (VAR_DOMAIN
);
1072 sym
->set_is_argument (1);
1073 add_symbol_to_list (sym
, get_local_symbols ());
1075 if (gdbarch_byte_order (gdbarch
) != BFD_ENDIAN_BIG
)
1077 /* On little-endian machines, this crud is never necessary,
1078 and, if the extra bytes contain garbage, is harmful. */
1082 /* If it's gcc-compiled, if it says `short', believe it. */
1083 if (processing_gcc_compilation
1084 || gdbarch_believe_pcc_promotion (gdbarch
))
1087 if (!gdbarch_believe_pcc_promotion (gdbarch
))
1089 /* If PCC says a parameter is a short or a char, it is
1091 if (sym
->type ()->length ()
1092 < gdbarch_int_bit (gdbarch
) / TARGET_CHAR_BIT
1093 && sym
->type ()->code () == TYPE_CODE_INT
)
1096 (sym
->type ()->is_unsigned ()
1097 ? objfile_type (objfile
)->builtin_unsigned_int
1098 : objfile_type (objfile
)->builtin_int
);
1105 /* acc seems to use P to declare the prototypes of functions that
1106 are referenced by this file. gdb is not prepared to deal
1107 with this extra information. FIXME, it ought to. */
1110 sym
->set_type (read_type (&p
, objfile
));
1111 goto process_prototype_types
;
1116 /* Parameter which is in a register. */
1117 sym
->set_type (read_type (&p
, objfile
));
1118 sym
->set_aclass_index (stab_register_index
);
1119 sym
->set_is_argument (1);
1120 sym
->set_value_longest (valu
);
1121 sym
->set_domain (VAR_DOMAIN
);
1122 add_symbol_to_list (sym
, get_local_symbols ());
1126 /* Register variable (either global or local). */
1127 sym
->set_type (read_type (&p
, objfile
));
1128 sym
->set_aclass_index (stab_register_index
);
1129 sym
->set_value_longest (valu
);
1130 sym
->set_domain (VAR_DOMAIN
);
1131 if (within_function
)
1133 /* Sun cc uses a pair of symbols, one 'p' and one 'r', with
1134 the same name to represent an argument passed in a
1135 register. GCC uses 'P' for the same case. So if we find
1136 such a symbol pair we combine it into one 'P' symbol.
1137 For Sun cc we need to do this regardless of stabs_argument_has_addr, because the compiler puts out
1138 the 'p' symbol even if it never saves the argument onto
1141 On most machines, we want to preserve both symbols, so
1142 that we can still get information about what is going on
1143 with the stack (VAX for computing args_printed, using
1144 stack slots instead of saved registers in backtraces,
1147 Note that this code illegally combines
1148 main(argc) struct foo argc; { register struct foo argc; }
1149 but this case is considered pathological and causes a warning
1150 from a decent compiler. */
1152 struct pending
*local_symbols
= *get_local_symbols ();
1154 && local_symbols
->nsyms
> 0
1155 && gdbarch_stabs_argument_has_addr (gdbarch
, sym
->type ()))
1157 struct symbol
*prev_sym
;
1159 prev_sym
= local_symbols
->symbol
[local_symbols
->nsyms
- 1];
1160 if ((prev_sym
->aclass () == LOC_REF_ARG
1161 || prev_sym
->aclass () == LOC_ARG
)
1162 && strcmp (prev_sym
->linkage_name (),
1163 sym
->linkage_name ()) == 0)
1165 prev_sym
->set_aclass_index (stab_register_index
);
1166 /* Use the type from the LOC_REGISTER; that is the type
1167 that is actually in that register. */
1168 prev_sym
->set_type (sym
->type ());
1169 prev_sym
->set_value_longest (sym
->value_longest ());
1174 add_symbol_to_list (sym
, get_local_symbols ());
1177 add_symbol_to_list (sym
, get_file_symbols ());
1181 /* Static symbol at top level of file. */
1182 sym
->set_type (read_type (&p
, objfile
));
1183 sym
->set_aclass_index (LOC_STATIC
);
1184 sym
->set_value_address (valu
);
1185 sym
->set_domain (VAR_DOMAIN
);
1186 add_symbol_to_list (sym
, get_file_symbols ());
1190 /* In Ada, there is no distinction between typedef and non-typedef;
1191 any type declaration implicitly has the equivalent of a typedef,
1192 and thus 't' is in fact equivalent to 'Tt'.
1194 Therefore, for Ada units, we check the character immediately
1195 before the 't', and if we do not find a 'T', then make sure to
1196 create the associated symbol in the STRUCT_DOMAIN ('t' definitions
1197 will be stored in the VAR_DOMAIN). If the symbol was indeed
1198 defined as 'Tt' then the STRUCT_DOMAIN symbol will be created
1199 elsewhere, so we don't need to take care of that.
1201 This is important to do, because of forward references:
1202 The cleanup of undefined types stored in undef_types only uses
1203 STRUCT_DOMAIN symbols to perform the replacement. */
1204 synonym
= (sym
->language () == language_ada
&& p
[-2] != 'T');
1207 sym
->set_type (read_type (&p
, objfile
));
1209 /* For a nameless type, we don't want a create a symbol, thus we
1210 did not use `sym'. Return without further processing. */
1214 sym
->set_aclass_index (LOC_TYPEDEF
);
1215 sym
->set_value_longest (valu
);
1216 sym
->set_domain (VAR_DOMAIN
);
1217 /* C++ vagaries: we may have a type which is derived from
1218 a base type which did not have its name defined when the
1219 derived class was output. We fill in the derived class's
1220 base part member's name here in that case. */
1221 if (sym
->type ()->name () != NULL
)
1222 if ((sym
->type ()->code () == TYPE_CODE_STRUCT
1223 || sym
->type ()->code () == TYPE_CODE_UNION
)
1224 && TYPE_N_BASECLASSES (sym
->type ()))
1228 for (j
= TYPE_N_BASECLASSES (sym
->type ()) - 1; j
>= 0; j
--)
1229 if (TYPE_BASECLASS_NAME (sym
->type (), j
) == 0)
1230 sym
->type ()->field (j
).set_name
1231 (TYPE_BASECLASS (sym
->type (), j
)->name ());
1234 if (sym
->type ()->name () == NULL
)
1236 if ((sym
->type ()->code () == TYPE_CODE_PTR
1237 && strcmp (sym
->linkage_name (), vtbl_ptr_name
))
1238 || sym
->type ()->code () == TYPE_CODE_FUNC
)
1240 /* If we are giving a name to a type such as "pointer to
1241 foo" or "function returning foo", we better not set
1242 the TYPE_NAME. If the program contains "typedef char
1243 *caddr_t;", we don't want all variables of type char
1244 * to print as caddr_t. This is not just a
1245 consequence of GDB's type management; PCC and GCC (at
1246 least through version 2.4) both output variables of
1247 either type char * or caddr_t with the type number
1248 defined in the 't' symbol for caddr_t. If a future
1249 compiler cleans this up it GDB is not ready for it
1250 yet, but if it becomes ready we somehow need to
1251 disable this check (without breaking the PCC/GCC2.4
1256 Fortunately, this check seems not to be necessary
1257 for anything except pointers or functions. */
1258 /* ezannoni: 2000-10-26. This seems to apply for
1259 versions of gcc older than 2.8. This was the original
1260 problem: with the following code gdb would tell that
1261 the type for name1 is caddr_t, and func is char().
1263 typedef char *caddr_t;
1275 /* Pascal accepts names for pointer types. */
1276 if (get_current_subfile ()->language
== language_pascal
)
1277 sym
->type ()->set_name (sym
->linkage_name ());
1280 sym
->type ()->set_name (sym
->linkage_name ());
1283 add_symbol_to_list (sym
, get_file_symbols ());
1287 /* Create the STRUCT_DOMAIN clone. */
1288 struct symbol
*struct_sym
= new (&objfile
->objfile_obstack
) symbol
;
1291 struct_sym
->set_aclass_index (LOC_TYPEDEF
);
1292 struct_sym
->set_value_longest (valu
);
1293 struct_sym
->set_domain (STRUCT_DOMAIN
);
1294 if (sym
->type ()->name () == 0)
1295 sym
->type ()->set_name
1296 (obconcat (&objfile
->objfile_obstack
, sym
->linkage_name (),
1298 add_symbol_to_list (struct_sym
, get_file_symbols ());
1304 /* Struct, union, or enum tag. For GNU C++, this can be be followed
1305 by 't' which means we are typedef'ing it as well. */
1306 synonym
= *p
== 't';
1311 sym
->set_type (read_type (&p
, objfile
));
1313 /* For a nameless type, we don't want a create a symbol, thus we
1314 did not use `sym'. Return without further processing. */
1318 sym
->set_aclass_index (LOC_TYPEDEF
);
1319 sym
->set_value_longest (valu
);
1320 sym
->set_domain (STRUCT_DOMAIN
);
1321 if (sym
->type ()->name () == 0)
1322 sym
->type ()->set_name
1323 (obconcat (&objfile
->objfile_obstack
, sym
->linkage_name (),
1325 add_symbol_to_list (sym
, get_file_symbols ());
1329 /* Clone the sym and then modify it. */
1330 struct symbol
*typedef_sym
= new (&objfile
->objfile_obstack
) symbol
;
1332 *typedef_sym
= *sym
;
1333 typedef_sym
->set_aclass_index (LOC_TYPEDEF
);
1334 typedef_sym
->set_value_longest (valu
);
1335 typedef_sym
->set_domain (VAR_DOMAIN
);
1336 if (sym
->type ()->name () == 0)
1337 sym
->type ()->set_name
1338 (obconcat (&objfile
->objfile_obstack
, sym
->linkage_name (),
1340 add_symbol_to_list (typedef_sym
, get_file_symbols ());
1345 /* Static symbol of local scope. */
1346 sym
->set_type (read_type (&p
, objfile
));
1347 sym
->set_aclass_index (LOC_STATIC
);
1348 sym
->set_value_address (valu
);
1349 sym
->set_domain (VAR_DOMAIN
);
1350 add_symbol_to_list (sym
, get_local_symbols ());
1354 /* Reference parameter */
1355 sym
->set_type (read_type (&p
, objfile
));
1356 sym
->set_aclass_index (LOC_REF_ARG
);
1357 sym
->set_is_argument (1);
1358 sym
->set_value_longest (valu
);
1359 sym
->set_domain (VAR_DOMAIN
);
1360 add_symbol_to_list (sym
, get_local_symbols ());
1364 /* Reference parameter which is in a register. */
1365 sym
->set_type (read_type (&p
, objfile
));
1366 sym
->set_aclass_index (stab_regparm_index
);
1367 sym
->set_is_argument (1);
1368 sym
->set_value_longest (valu
);
1369 sym
->set_domain (VAR_DOMAIN
);
1370 add_symbol_to_list (sym
, get_local_symbols ());
1374 /* This is used by Sun FORTRAN for "function result value".
1375 Sun claims ("dbx and dbxtool interfaces", 2nd ed)
1376 that Pascal uses it too, but when I tried it Pascal used
1377 "x:3" (local symbol) instead. */
1378 sym
->set_type (read_type (&p
, objfile
));
1379 sym
->set_aclass_index (LOC_LOCAL
);
1380 sym
->set_value_longest (valu
);
1381 sym
->set_domain (VAR_DOMAIN
);
1382 add_symbol_to_list (sym
, get_local_symbols ());
1386 sym
->set_type (error_type (&p
, objfile
));
1387 sym
->set_aclass_index (LOC_CONST
);
1388 sym
->set_value_longest (0);
1389 sym
->set_domain (VAR_DOMAIN
);
1390 add_symbol_to_list (sym
, get_file_symbols ());
1394 /* Some systems pass variables of certain types by reference instead
1395 of by value, i.e. they will pass the address of a structure (in a
1396 register or on the stack) instead of the structure itself. */
1398 if (gdbarch_stabs_argument_has_addr (gdbarch
, sym
->type ())
1399 && sym
->is_argument ())
1401 /* We have to convert LOC_REGISTER to LOC_REGPARM_ADDR (for
1402 variables passed in a register). */
1403 if (sym
->aclass () == LOC_REGISTER
)
1404 sym
->set_aclass_index (LOC_REGPARM_ADDR
);
1405 /* Likewise for converting LOC_ARG to LOC_REF_ARG (for the 7th
1406 and subsequent arguments on SPARC, for example). */
1407 else if (sym
->aclass () == LOC_ARG
)
1408 sym
->set_aclass_index (LOC_REF_ARG
);
1414 /* Skip rest of this symbol and return an error type.
1416 General notes on error recovery: error_type always skips to the
1417 end of the symbol (modulo cretinous dbx symbol name continuation).
1418 Thus code like this:
1420 if (*(*pp)++ != ';')
1421 return error_type (pp, objfile);
1423 is wrong because if *pp starts out pointing at '\0' (typically as the
1424 result of an earlier error), it will be incremented to point to the
1425 start of the next symbol, which might produce strange results, at least
1426 if you run off the end of the string table. Instead use
1429 return error_type (pp, objfile);
1435 foo = error_type (pp, objfile);
1439 And in case it isn't obvious, the point of all this hair is so the compiler
1440 can define new types and new syntaxes, and old versions of the
1441 debugger will be able to read the new symbol tables. */
1443 static struct type
*
1444 error_type (const char **pp
, struct objfile
*objfile
)
1446 complaint (_("couldn't parse type; debugger out of date?"));
1449 /* Skip to end of symbol. */
1450 while (**pp
!= '\0')
1455 /* Check for and handle cretinous dbx symbol name continuation! */
1456 if ((*pp
)[-1] == '\\' || (*pp
)[-1] == '?')
1458 *pp
= next_symbol_text (objfile
);
1465 return objfile_type (objfile
)->builtin_error
;
1469 /* Read type information or a type definition; return the type. Even
1470 though this routine accepts either type information or a type
1471 definition, the distinction is relevant--some parts of stabsread.c
1472 assume that type information starts with a digit, '-', or '(' in
1473 deciding whether to call read_type. */
1475 static struct type
*
1476 read_type (const char **pp
, struct objfile
*objfile
)
1478 struct type
*type
= 0;
1481 char type_descriptor
;
1483 /* Size in bits of type if specified by a type attribute, or -1 if
1484 there is no size attribute. */
1487 /* Used to distinguish string and bitstring from char-array and set. */
1490 /* Used to distinguish vector from array. */
1493 /* Read type number if present. The type number may be omitted.
1494 for instance in a two-dimensional array declared with type
1495 "ar1;1;10;ar1;1;10;4". */
1496 if ((**pp
>= '0' && **pp
<= '9')
1500 if (read_type_number (pp
, typenums
) != 0)
1501 return error_type (pp
, objfile
);
1505 /* Type is not being defined here. Either it already
1506 exists, or this is a forward reference to it.
1507 dbx_alloc_type handles both cases. */
1508 type
= dbx_alloc_type (typenums
, objfile
);
1510 /* If this is a forward reference, arrange to complain if it
1511 doesn't get patched up by the time we're done
1513 if (type
->code () == TYPE_CODE_UNDEF
)
1514 add_undefined_type (type
, typenums
);
1519 /* Type is being defined here. */
1521 Also skip the type descriptor - we get it below with (*pp)[-1]. */
1526 /* 'typenums=' not present, type is anonymous. Read and return
1527 the definition, but don't put it in the type vector. */
1528 typenums
[0] = typenums
[1] = -1;
1533 type_descriptor
= (*pp
)[-1];
1534 switch (type_descriptor
)
1538 enum type_code code
;
1540 /* Used to index through file_symbols. */
1541 struct pending
*ppt
;
1544 /* Name including "struct", etc. */
1548 const char *from
, *p
, *q1
, *q2
;
1550 /* Set the type code according to the following letter. */
1554 code
= TYPE_CODE_STRUCT
;
1557 code
= TYPE_CODE_UNION
;
1560 code
= TYPE_CODE_ENUM
;
1564 /* Complain and keep going, so compilers can invent new
1565 cross-reference types. */
1566 complaint (_("Unrecognized cross-reference type `%c'"),
1568 code
= TYPE_CODE_STRUCT
;
1573 q1
= strchr (*pp
, '<');
1574 p
= strchr (*pp
, ':');
1576 return error_type (pp
, objfile
);
1577 if (q1
&& p
> q1
&& p
[1] == ':')
1579 int nesting_level
= 0;
1581 for (q2
= q1
; *q2
; q2
++)
1585 else if (*q2
== '>')
1587 else if (*q2
== ':' && nesting_level
== 0)
1592 return error_type (pp
, objfile
);
1595 if (get_current_subfile ()->language
== language_cplus
)
1597 std::string
name (*pp
, p
- *pp
);
1598 gdb::unique_xmalloc_ptr
<char> new_name
1599 = cp_canonicalize_string (name
.c_str ());
1600 if (new_name
!= nullptr)
1601 type_name
= obstack_strdup (&objfile
->objfile_obstack
,
1604 else if (get_current_subfile ()->language
== language_c
)
1606 std::string
name (*pp
, p
- *pp
);
1607 gdb::unique_xmalloc_ptr
<char> new_name
1608 = c_canonicalize_name (name
.c_str ());
1609 if (new_name
!= nullptr)
1610 type_name
= obstack_strdup (&objfile
->objfile_obstack
,
1613 if (type_name
== NULL
)
1615 char *to
= type_name
= (char *)
1616 obstack_alloc (&objfile
->objfile_obstack
, p
- *pp
+ 1);
1618 /* Copy the name. */
1625 /* Set the pointer ahead of the name which we just read, and
1630 /* If this type has already been declared, then reuse the same
1631 type, rather than allocating a new one. This saves some
1634 for (ppt
= *get_file_symbols (); ppt
; ppt
= ppt
->next
)
1635 for (i
= 0; i
< ppt
->nsyms
; i
++)
1637 struct symbol
*sym
= ppt
->symbol
[i
];
1639 if (sym
->aclass () == LOC_TYPEDEF
1640 && sym
->domain () == STRUCT_DOMAIN
1641 && (sym
->type ()->code () == code
)
1642 && strcmp (sym
->linkage_name (), type_name
) == 0)
1644 obstack_free (&objfile
->objfile_obstack
, type_name
);
1645 type
= sym
->type ();
1646 if (typenums
[0] != -1)
1647 *dbx_lookup_type (typenums
, objfile
) = type
;
1652 /* Didn't find the type to which this refers, so we must
1653 be dealing with a forward reference. Allocate a type
1654 structure for it, and keep track of it so we can
1655 fill in the rest of the fields when we get the full
1657 type
= dbx_alloc_type (typenums
, objfile
);
1658 type
->set_code (code
);
1659 type
->set_name (type_name
);
1660 INIT_CPLUS_SPECIFIC (type
);
1661 type
->set_is_stub (true);
1663 add_undefined_type (type
, typenums
);
1667 case '-': /* RS/6000 built-in type */
1681 /* We deal with something like t(1,2)=(3,4)=... which
1682 the Lucid compiler and recent gcc versions (post 2.7.3) use. */
1684 /* Allocate and enter the typedef type first.
1685 This handles recursive types. */
1686 type
= dbx_alloc_type (typenums
, objfile
);
1687 type
->set_code (TYPE_CODE_TYPEDEF
);
1689 struct type
*xtype
= read_type (pp
, objfile
);
1693 /* It's being defined as itself. That means it is "void". */
1694 type
->set_code (TYPE_CODE_VOID
);
1695 type
->set_length (1);
1697 else if (type_size
>= 0 || is_string
)
1699 /* This is the absolute wrong way to construct types. Every
1700 other debug format has found a way around this problem and
1701 the related problems with unnecessarily stubbed types;
1702 someone motivated should attempt to clean up the issue
1703 here as well. Once a type pointed to has been created it
1704 should not be modified.
1706 Well, it's not *absolutely* wrong. Constructing recursive
1707 types (trees, linked lists) necessarily entails modifying
1708 types after creating them. Constructing any loop structure
1709 entails side effects. The Dwarf 2 reader does handle this
1710 more gracefully (it never constructs more than once
1711 instance of a type object, so it doesn't have to copy type
1712 objects wholesale), but it still mutates type objects after
1713 other folks have references to them.
1715 Keep in mind that this circularity/mutation issue shows up
1716 at the source language level, too: C's "incomplete types",
1717 for example. So the proper cleanup, I think, would be to
1718 limit GDB's type smashing to match exactly those required
1719 by the source language. So GDB could have a
1720 "complete_this_type" function, but never create unnecessary
1721 copies of a type otherwise. */
1722 replace_type (type
, xtype
);
1723 type
->set_name (NULL
);
1727 type
->set_target_is_stub (true);
1728 type
->set_target_type (xtype
);
1733 /* In the following types, we must be sure to overwrite any existing
1734 type that the typenums refer to, rather than allocating a new one
1735 and making the typenums point to the new one. This is because there
1736 may already be pointers to the existing type (if it had been
1737 forward-referenced), and we must change it to a pointer, function,
1738 reference, or whatever, *in-place*. */
1740 case '*': /* Pointer to another type */
1741 type1
= read_type (pp
, objfile
);
1742 type
= make_pointer_type (type1
, dbx_lookup_type (typenums
, objfile
));
1745 case '&': /* Reference to another type */
1746 type1
= read_type (pp
, objfile
);
1747 type
= make_reference_type (type1
, dbx_lookup_type (typenums
, objfile
),
1751 case 'f': /* Function returning another type */
1752 type1
= read_type (pp
, objfile
);
1753 type
= make_function_type (type1
, dbx_lookup_type (typenums
, objfile
));
1756 case 'g': /* Prototyped function. (Sun) */
1758 /* Unresolved questions:
1760 - According to Sun's ``STABS Interface Manual'', for 'f'
1761 and 'F' symbol descriptors, a `0' in the argument type list
1762 indicates a varargs function. But it doesn't say how 'g'
1763 type descriptors represent that info. Someone with access
1764 to Sun's toolchain should try it out.
1766 - According to the comment in define_symbol (search for
1767 `process_prototype_types:'), Sun emits integer arguments as
1768 types which ref themselves --- like `void' types. Do we
1769 have to deal with that here, too? Again, someone with
1770 access to Sun's toolchain should try it out and let us
1773 const char *type_start
= (*pp
) - 1;
1774 struct type
*return_type
= read_type (pp
, objfile
);
1775 struct type
*func_type
1776 = make_function_type (return_type
,
1777 dbx_lookup_type (typenums
, objfile
));
1780 struct type_list
*next
;
1784 while (**pp
&& **pp
!= '#')
1786 struct type
*arg_type
= read_type (pp
, objfile
);
1787 struct type_list
*newobj
= XALLOCA (struct type_list
);
1788 newobj
->type
= arg_type
;
1789 newobj
->next
= arg_types
;
1797 complaint (_("Prototyped function type didn't "
1798 "end arguments with `#':\n%s"),
1802 /* If there is just one argument whose type is `void', then
1803 that's just an empty argument list. */
1805 && ! arg_types
->next
1806 && arg_types
->type
->code () == TYPE_CODE_VOID
)
1809 func_type
->set_fields
1810 ((struct field
*) TYPE_ALLOC (func_type
,
1811 num_args
* sizeof (struct field
)));
1812 memset (func_type
->fields (), 0, num_args
* sizeof (struct field
));
1815 struct type_list
*t
;
1817 /* We stuck each argument type onto the front of the list
1818 when we read it, so the list is reversed. Build the
1819 fields array right-to-left. */
1820 for (t
= arg_types
, i
= num_args
- 1; t
; t
= t
->next
, i
--)
1821 func_type
->field (i
).set_type (t
->type
);
1823 func_type
->set_num_fields (num_args
);
1824 func_type
->set_is_prototyped (true);
1830 case 'k': /* Const qualifier on some type (Sun) */
1831 type
= read_type (pp
, objfile
);
1832 type
= make_cv_type (1, TYPE_VOLATILE (type
), type
,
1833 dbx_lookup_type (typenums
, objfile
));
1836 case 'B': /* Volatile qual on some type (Sun) */
1837 type
= read_type (pp
, objfile
);
1838 type
= make_cv_type (TYPE_CONST (type
), 1, type
,
1839 dbx_lookup_type (typenums
, objfile
));
1843 if (isdigit (**pp
) || **pp
== '(' || **pp
== '-')
1844 { /* Member (class & variable) type */
1845 /* FIXME -- we should be doing smash_to_XXX types here. */
1847 struct type
*domain
= read_type (pp
, objfile
);
1848 struct type
*memtype
;
1851 /* Invalid member type data format. */
1852 return error_type (pp
, objfile
);
1855 memtype
= read_type (pp
, objfile
);
1856 type
= dbx_alloc_type (typenums
, objfile
);
1857 smash_to_memberptr_type (type
, domain
, memtype
);
1860 /* type attribute */
1862 const char *attr
= *pp
;
1864 /* Skip to the semicolon. */
1865 while (**pp
!= ';' && **pp
!= '\0')
1868 return error_type (pp
, objfile
);
1870 ++ * pp
; /* Skip the semicolon. */
1874 case 's': /* Size attribute */
1875 type_size
= atoi (attr
+ 1);
1880 case 'S': /* String attribute */
1881 /* FIXME: check to see if following type is array? */
1885 case 'V': /* Vector attribute */
1886 /* FIXME: check to see if following type is array? */
1891 /* Ignore unrecognized type attributes, so future compilers
1892 can invent new ones. */
1900 case '#': /* Method (class & fn) type */
1901 if ((*pp
)[0] == '#')
1903 /* We'll get the parameter types from the name. */
1904 struct type
*return_type
;
1907 return_type
= read_type (pp
, objfile
);
1908 if (*(*pp
)++ != ';')
1909 complaint (_("invalid (minimal) member type "
1910 "data format at symtab pos %d."),
1912 type
= allocate_stub_method (return_type
);
1913 if (typenums
[0] != -1)
1914 *dbx_lookup_type (typenums
, objfile
) = type
;
1918 struct type
*domain
= read_type (pp
, objfile
);
1919 struct type
*return_type
;
1924 /* Invalid member type data format. */
1925 return error_type (pp
, objfile
);
1929 return_type
= read_type (pp
, objfile
);
1930 args
= read_args (pp
, ';', objfile
, &nargs
, &varargs
);
1932 return error_type (pp
, objfile
);
1933 type
= dbx_alloc_type (typenums
, objfile
);
1934 smash_to_method_type (type
, domain
, return_type
, args
,
1939 case 'r': /* Range type */
1940 type
= read_range_type (pp
, typenums
, type_size
, objfile
);
1941 if (typenums
[0] != -1)
1942 *dbx_lookup_type (typenums
, objfile
) = type
;
1947 /* Sun ACC builtin int type */
1948 type
= read_sun_builtin_type (pp
, typenums
, objfile
);
1949 if (typenums
[0] != -1)
1950 *dbx_lookup_type (typenums
, objfile
) = type
;
1954 case 'R': /* Sun ACC builtin float type */
1955 type
= read_sun_floating_type (pp
, typenums
, objfile
);
1956 if (typenums
[0] != -1)
1957 *dbx_lookup_type (typenums
, objfile
) = type
;
1960 case 'e': /* Enumeration type */
1961 type
= dbx_alloc_type (typenums
, objfile
);
1962 type
= read_enum_type (pp
, type
, objfile
);
1963 if (typenums
[0] != -1)
1964 *dbx_lookup_type (typenums
, objfile
) = type
;
1967 case 's': /* Struct type */
1968 case 'u': /* Union type */
1970 enum type_code type_code
= TYPE_CODE_UNDEF
;
1971 type
= dbx_alloc_type (typenums
, objfile
);
1972 switch (type_descriptor
)
1975 type_code
= TYPE_CODE_STRUCT
;
1978 type_code
= TYPE_CODE_UNION
;
1981 type
= read_struct_type (pp
, type
, type_code
, objfile
);
1985 case 'a': /* Array type */
1987 return error_type (pp
, objfile
);
1990 type
= dbx_alloc_type (typenums
, objfile
);
1991 type
= read_array_type (pp
, type
, objfile
);
1993 type
->set_code (TYPE_CODE_STRING
);
1995 make_vector_type (type
);
1998 case 'S': /* Set type */
1999 type1
= read_type (pp
, objfile
);
2000 type
= create_set_type (NULL
, type1
);
2001 if (typenums
[0] != -1)
2002 *dbx_lookup_type (typenums
, objfile
) = type
;
2006 --*pp
; /* Go back to the symbol in error. */
2007 /* Particularly important if it was \0! */
2008 return error_type (pp
, objfile
);
2013 warning (_("GDB internal error, type is NULL in stabsread.c."));
2014 return error_type (pp
, objfile
);
2017 /* Size specified in a type attribute overrides any other size. */
2018 if (type_size
!= -1)
2019 type
->set_length ((type_size
+ TARGET_CHAR_BIT
- 1) / TARGET_CHAR_BIT
);
2024 /* RS/6000 xlc/dbx combination uses a set of builtin types, starting from -1.
2025 Return the proper type node for a given builtin type number. */
2027 static const registry
<objfile
>::key
<struct type
*,
2028 gdb::noop_deleter
<struct type
*>>
2029 rs6000_builtin_type_data
;
2031 static struct type
*
2032 rs6000_builtin_type (int typenum
, struct objfile
*objfile
)
2034 struct type
**negative_types
= rs6000_builtin_type_data
.get (objfile
);
2036 /* We recognize types numbered from -NUMBER_RECOGNIZED to -1. */
2037 #define NUMBER_RECOGNIZED 34
2038 struct type
*rettype
= NULL
;
2040 if (typenum
>= 0 || typenum
< -NUMBER_RECOGNIZED
)
2042 complaint (_("Unknown builtin type %d"), typenum
);
2043 return objfile_type (objfile
)->builtin_error
;
2046 if (!negative_types
)
2048 /* This includes an empty slot for type number -0. */
2049 negative_types
= OBSTACK_CALLOC (&objfile
->objfile_obstack
,
2050 NUMBER_RECOGNIZED
+ 1, struct type
*);
2051 rs6000_builtin_type_data
.set (objfile
, negative_types
);
2054 if (negative_types
[-typenum
] != NULL
)
2055 return negative_types
[-typenum
];
2057 #if TARGET_CHAR_BIT != 8
2058 #error This code wrong for TARGET_CHAR_BIT not 8
2059 /* These definitions all assume that TARGET_CHAR_BIT is 8. I think
2060 that if that ever becomes not true, the correct fix will be to
2061 make the size in the struct type to be in bits, not in units of
2068 /* The size of this and all the other types are fixed, defined
2069 by the debugging format. If there is a type called "int" which
2070 is other than 32 bits, then it should use a new negative type
2071 number (or avoid negative type numbers for that case).
2072 See stabs.texinfo. */
2073 rettype
= init_integer_type (objfile
, 32, 0, "int");
2076 rettype
= init_integer_type (objfile
, 8, 0, "char");
2077 rettype
->set_has_no_signedness (true);
2080 rettype
= init_integer_type (objfile
, 16, 0, "short");
2083 rettype
= init_integer_type (objfile
, 32, 0, "long");
2086 rettype
= init_integer_type (objfile
, 8, 1, "unsigned char");
2089 rettype
= init_integer_type (objfile
, 8, 0, "signed char");
2092 rettype
= init_integer_type (objfile
, 16, 1, "unsigned short");
2095 rettype
= init_integer_type (objfile
, 32, 1, "unsigned int");
2098 rettype
= init_integer_type (objfile
, 32, 1, "unsigned");
2101 rettype
= init_integer_type (objfile
, 32, 1, "unsigned long");
2104 rettype
= init_type (objfile
, TYPE_CODE_VOID
, TARGET_CHAR_BIT
, "void");
2107 /* IEEE single precision (32 bit). */
2108 rettype
= init_float_type (objfile
, 32, "float",
2109 floatformats_ieee_single
);
2112 /* IEEE double precision (64 bit). */
2113 rettype
= init_float_type (objfile
, 64, "double",
2114 floatformats_ieee_double
);
2117 /* This is an IEEE double on the RS/6000, and different machines with
2118 different sizes for "long double" should use different negative
2119 type numbers. See stabs.texinfo. */
2120 rettype
= init_float_type (objfile
, 64, "long double",
2121 floatformats_ieee_double
);
2124 rettype
= init_integer_type (objfile
, 32, 0, "integer");
2127 rettype
= init_boolean_type (objfile
, 32, 1, "boolean");
2130 rettype
= init_float_type (objfile
, 32, "short real",
2131 floatformats_ieee_single
);
2134 rettype
= init_float_type (objfile
, 64, "real",
2135 floatformats_ieee_double
);
2138 rettype
= init_type (objfile
, TYPE_CODE_ERROR
, 0, "stringptr");
2141 rettype
= init_character_type (objfile
, 8, 1, "character");
2144 rettype
= init_boolean_type (objfile
, 8, 1, "logical*1");
2147 rettype
= init_boolean_type (objfile
, 16, 1, "logical*2");
2150 rettype
= init_boolean_type (objfile
, 32, 1, "logical*4");
2153 rettype
= init_boolean_type (objfile
, 32, 1, "logical");
2156 /* Complex type consisting of two IEEE single precision values. */
2157 rettype
= init_complex_type ("complex",
2158 rs6000_builtin_type (12, objfile
));
2161 /* Complex type consisting of two IEEE double precision values. */
2162 rettype
= init_complex_type ("double complex",
2163 rs6000_builtin_type (13, objfile
));
2166 rettype
= init_integer_type (objfile
, 8, 0, "integer*1");
2169 rettype
= init_integer_type (objfile
, 16, 0, "integer*2");
2172 rettype
= init_integer_type (objfile
, 32, 0, "integer*4");
2175 rettype
= init_character_type (objfile
, 16, 0, "wchar");
2178 rettype
= init_integer_type (objfile
, 64, 0, "long long");
2181 rettype
= init_integer_type (objfile
, 64, 1, "unsigned long long");
2184 rettype
= init_integer_type (objfile
, 64, 1, "logical*8");
2187 rettype
= init_integer_type (objfile
, 64, 0, "integer*8");
2190 negative_types
[-typenum
] = rettype
;
2194 /* This page contains subroutines of read_type. */
2196 /* Wrapper around method_name_from_physname to flag a complaint
2197 if there is an error. */
2200 stabs_method_name_from_physname (const char *physname
)
2204 method_name
= method_name_from_physname (physname
);
2206 if (method_name
== NULL
)
2208 complaint (_("Method has bad physname %s\n"), physname
);
2215 /* Read member function stabs info for C++ classes. The form of each member
2218 NAME :: TYPENUM[=type definition] ARGS : PHYSNAME ;
2220 An example with two member functions is:
2222 afunc1::20=##15;:i;2A.;afunc2::20:i;2A.;
2224 For the case of overloaded operators, the format is op$::*.funcs, where
2225 $ is the CPLUS_MARKER (usually '$'), `*' holds the place for an operator
2226 name (such as `+=') and `.' marks the end of the operator name.
2228 Returns 1 for success, 0 for failure. */
2231 read_member_functions (struct stab_field_info
*fip
, const char **pp
,
2232 struct type
*type
, struct objfile
*objfile
)
2239 struct next_fnfield
*next
;
2240 struct fn_field fn_field
;
2243 struct type
*look_ahead_type
;
2244 struct next_fnfieldlist
*new_fnlist
;
2245 struct next_fnfield
*new_sublist
;
2249 /* Process each list until we find something that is not a member function
2250 or find the end of the functions. */
2254 /* We should be positioned at the start of the function name.
2255 Scan forward to find the first ':' and if it is not the
2256 first of a "::" delimiter, then this is not a member function. */
2268 look_ahead_type
= NULL
;
2271 new_fnlist
= OBSTACK_ZALLOC (&fip
->obstack
, struct next_fnfieldlist
);
2273 if ((*pp
)[0] == 'o' && (*pp
)[1] == 'p' && is_cplus_marker ((*pp
)[2]))
2275 /* This is a completely wierd case. In order to stuff in the
2276 names that might contain colons (the usual name delimiter),
2277 Mike Tiemann defined a different name format which is
2278 signalled if the identifier is "op$". In that case, the
2279 format is "op$::XXXX." where XXXX is the name. This is
2280 used for names like "+" or "=". YUUUUUUUK! FIXME! */
2281 /* This lets the user type "break operator+".
2282 We could just put in "+" as the name, but that wouldn't
2284 static char opname
[32] = "op$";
2285 char *o
= opname
+ 3;
2287 /* Skip past '::'. */
2290 STABS_CONTINUE (pp
, objfile
);
2296 main_fn_name
= savestring (opname
, o
- opname
);
2302 main_fn_name
= savestring (*pp
, p
- *pp
);
2303 /* Skip past '::'. */
2306 new_fnlist
->fn_fieldlist
.name
= main_fn_name
;
2310 new_sublist
= OBSTACK_ZALLOC (&fip
->obstack
, struct next_fnfield
);
2312 /* Check for and handle cretinous dbx symbol name continuation! */
2313 if (look_ahead_type
== NULL
)
2316 STABS_CONTINUE (pp
, objfile
);
2318 new_sublist
->fn_field
.type
= read_type (pp
, objfile
);
2321 /* Invalid symtab info for member function. */
2327 /* g++ version 1 kludge */
2328 new_sublist
->fn_field
.type
= look_ahead_type
;
2329 look_ahead_type
= NULL
;
2339 /* These are methods, not functions. */
2340 if (new_sublist
->fn_field
.type
->code () == TYPE_CODE_FUNC
)
2341 new_sublist
->fn_field
.type
->set_code (TYPE_CODE_METHOD
);
2343 /* If this is just a stub, then we don't have the real name here. */
2344 if (new_sublist
->fn_field
.type
->is_stub ())
2346 if (!TYPE_SELF_TYPE (new_sublist
->fn_field
.type
))
2347 set_type_self_type (new_sublist
->fn_field
.type
, type
);
2348 new_sublist
->fn_field
.is_stub
= 1;
2351 new_sublist
->fn_field
.physname
= savestring (*pp
, p
- *pp
);
2354 /* Set this member function's visibility fields. */
2357 case VISIBILITY_PRIVATE
:
2358 new_sublist
->fn_field
.is_private
= 1;
2360 case VISIBILITY_PROTECTED
:
2361 new_sublist
->fn_field
.is_protected
= 1;
2365 STABS_CONTINUE (pp
, objfile
);
2368 case 'A': /* Normal functions. */
2369 new_sublist
->fn_field
.is_const
= 0;
2370 new_sublist
->fn_field
.is_volatile
= 0;
2373 case 'B': /* `const' member functions. */
2374 new_sublist
->fn_field
.is_const
= 1;
2375 new_sublist
->fn_field
.is_volatile
= 0;
2378 case 'C': /* `volatile' member function. */
2379 new_sublist
->fn_field
.is_const
= 0;
2380 new_sublist
->fn_field
.is_volatile
= 1;
2383 case 'D': /* `const volatile' member function. */
2384 new_sublist
->fn_field
.is_const
= 1;
2385 new_sublist
->fn_field
.is_volatile
= 1;
2388 case '*': /* File compiled with g++ version 1 --
2394 complaint (_("const/volatile indicator missing, got '%c'"),
2404 /* virtual member function, followed by index.
2405 The sign bit is set to distinguish pointers-to-methods
2406 from virtual function indicies. Since the array is
2407 in words, the quantity must be shifted left by 1
2408 on 16 bit machine, and by 2 on 32 bit machine, forcing
2409 the sign bit out, and usable as a valid index into
2410 the array. Remove the sign bit here. */
2411 new_sublist
->fn_field
.voffset
=
2412 (0x7fffffff & read_huge_number (pp
, ';', &nbits
, 0)) + 2;
2416 STABS_CONTINUE (pp
, objfile
);
2417 if (**pp
== ';' || **pp
== '\0')
2419 /* Must be g++ version 1. */
2420 new_sublist
->fn_field
.fcontext
= 0;
2424 /* Figure out from whence this virtual function came.
2425 It may belong to virtual function table of
2426 one of its baseclasses. */
2427 look_ahead_type
= read_type (pp
, objfile
);
2430 /* g++ version 1 overloaded methods. */
2434 new_sublist
->fn_field
.fcontext
= look_ahead_type
;
2443 look_ahead_type
= NULL
;
2449 /* static member function. */
2451 int slen
= strlen (main_fn_name
);
2453 new_sublist
->fn_field
.voffset
= VOFFSET_STATIC
;
2455 /* For static member functions, we can't tell if they
2456 are stubbed, as they are put out as functions, and not as
2458 GCC v2 emits the fully mangled name if
2459 dbxout.c:flag_minimal_debug is not set, so we have to
2460 detect a fully mangled physname here and set is_stub
2461 accordingly. Fully mangled physnames in v2 start with
2462 the member function name, followed by two underscores.
2463 GCC v3 currently always emits stubbed member functions,
2464 but with fully mangled physnames, which start with _Z. */
2465 if (!(strncmp (new_sublist
->fn_field
.physname
,
2466 main_fn_name
, slen
) == 0
2467 && new_sublist
->fn_field
.physname
[slen
] == '_'
2468 && new_sublist
->fn_field
.physname
[slen
+ 1] == '_'))
2470 new_sublist
->fn_field
.is_stub
= 1;
2477 complaint (_("member function type missing, got '%c'"),
2479 /* Normal member function. */
2483 /* normal member function. */
2484 new_sublist
->fn_field
.voffset
= 0;
2485 new_sublist
->fn_field
.fcontext
= 0;
2489 new_sublist
->next
= sublist
;
2490 sublist
= new_sublist
;
2492 STABS_CONTINUE (pp
, objfile
);
2494 while (**pp
!= ';' && **pp
!= '\0');
2497 STABS_CONTINUE (pp
, objfile
);
2499 /* Skip GCC 3.X member functions which are duplicates of the callable
2500 constructor/destructor. */
2501 if (strcmp_iw (main_fn_name
, "__base_ctor ") == 0
2502 || strcmp_iw (main_fn_name
, "__base_dtor ") == 0
2503 || strcmp (main_fn_name
, "__deleting_dtor") == 0)
2505 xfree (main_fn_name
);
2509 int has_destructor
= 0, has_other
= 0;
2511 struct next_fnfield
*tmp_sublist
;
2513 /* Various versions of GCC emit various mostly-useless
2514 strings in the name field for special member functions.
2516 For stub methods, we need to defer correcting the name
2517 until we are ready to unstub the method, because the current
2518 name string is used by gdb_mangle_name. The only stub methods
2519 of concern here are GNU v2 operators; other methods have their
2520 names correct (see caveat below).
2522 For non-stub methods, in GNU v3, we have a complete physname.
2523 Therefore we can safely correct the name now. This primarily
2524 affects constructors and destructors, whose name will be
2525 __comp_ctor or __comp_dtor instead of Foo or ~Foo. Cast
2526 operators will also have incorrect names; for instance,
2527 "operator int" will be named "operator i" (i.e. the type is
2530 For non-stub methods in GNU v2, we have no easy way to
2531 know if we have a complete physname or not. For most
2532 methods the result depends on the platform (if CPLUS_MARKER
2533 can be `$' or `.', it will use minimal debug information, or
2534 otherwise the full physname will be included).
2536 Rather than dealing with this, we take a different approach.
2537 For v3 mangled names, we can use the full physname; for v2,
2538 we use cplus_demangle_opname (which is actually v2 specific),
2539 because the only interesting names are all operators - once again
2540 barring the caveat below. Skip this process if any method in the
2541 group is a stub, to prevent our fouling up the workings of
2544 The caveat: GCC 2.95.x (and earlier?) put constructors and
2545 destructors in the same method group. We need to split this
2546 into two groups, because they should have different names.
2547 So for each method group we check whether it contains both
2548 routines whose physname appears to be a destructor (the physnames
2549 for and destructors are always provided, due to quirks in v2
2550 mangling) and routines whose physname does not appear to be a
2551 destructor. If so then we break up the list into two halves.
2552 Even if the constructors and destructors aren't in the same group
2553 the destructor will still lack the leading tilde, so that also
2556 So, to summarize what we expect and handle here:
2558 Given Given Real Real Action
2559 method name physname physname method name
2561 __opi [none] __opi__3Foo operator int opname
2563 Foo _._3Foo _._3Foo ~Foo separate and
2565 operator i _ZN3FoocviEv _ZN3FoocviEv operator int demangle
2566 __comp_ctor _ZN3FooC1ERKS_ _ZN3FooC1ERKS_ Foo demangle
2569 tmp_sublist
= sublist
;
2570 while (tmp_sublist
!= NULL
)
2572 if (tmp_sublist
->fn_field
.physname
[0] == '_'
2573 && tmp_sublist
->fn_field
.physname
[1] == 'Z')
2576 if (is_destructor_name (tmp_sublist
->fn_field
.physname
))
2581 tmp_sublist
= tmp_sublist
->next
;
2584 if (has_destructor
&& has_other
)
2586 struct next_fnfieldlist
*destr_fnlist
;
2587 struct next_fnfield
*last_sublist
;
2589 /* Create a new fn_fieldlist for the destructors. */
2591 destr_fnlist
= OBSTACK_ZALLOC (&fip
->obstack
,
2592 struct next_fnfieldlist
);
2594 destr_fnlist
->fn_fieldlist
.name
2595 = obconcat (&objfile
->objfile_obstack
, "~",
2596 new_fnlist
->fn_fieldlist
.name
, (char *) NULL
);
2598 destr_fnlist
->fn_fieldlist
.fn_fields
=
2599 XOBNEWVEC (&objfile
->objfile_obstack
,
2600 struct fn_field
, has_destructor
);
2601 memset (destr_fnlist
->fn_fieldlist
.fn_fields
, 0,
2602 sizeof (struct fn_field
) * has_destructor
);
2603 tmp_sublist
= sublist
;
2604 last_sublist
= NULL
;
2606 while (tmp_sublist
!= NULL
)
2608 if (!is_destructor_name (tmp_sublist
->fn_field
.physname
))
2610 tmp_sublist
= tmp_sublist
->next
;
2614 destr_fnlist
->fn_fieldlist
.fn_fields
[i
++]
2615 = tmp_sublist
->fn_field
;
2617 last_sublist
->next
= tmp_sublist
->next
;
2619 sublist
= tmp_sublist
->next
;
2620 last_sublist
= tmp_sublist
;
2621 tmp_sublist
= tmp_sublist
->next
;
2624 destr_fnlist
->fn_fieldlist
.length
= has_destructor
;
2625 destr_fnlist
->next
= fip
->fnlist
;
2626 fip
->fnlist
= destr_fnlist
;
2628 length
-= has_destructor
;
2632 /* v3 mangling prevents the use of abbreviated physnames,
2633 so we can do this here. There are stubbed methods in v3
2635 - in -gstabs instead of -gstabs+
2636 - or for static methods, which are output as a function type
2637 instead of a method type. */
2638 char *new_method_name
=
2639 stabs_method_name_from_physname (sublist
->fn_field
.physname
);
2641 if (new_method_name
!= NULL
2642 && strcmp (new_method_name
,
2643 new_fnlist
->fn_fieldlist
.name
) != 0)
2645 new_fnlist
->fn_fieldlist
.name
= new_method_name
;
2646 xfree (main_fn_name
);
2649 xfree (new_method_name
);
2651 else if (has_destructor
&& new_fnlist
->fn_fieldlist
.name
[0] != '~')
2653 new_fnlist
->fn_fieldlist
.name
=
2654 obconcat (&objfile
->objfile_obstack
,
2655 "~", main_fn_name
, (char *)NULL
);
2656 xfree (main_fn_name
);
2659 new_fnlist
->fn_fieldlist
.fn_fields
2660 = OBSTACK_CALLOC (&objfile
->objfile_obstack
, length
, fn_field
);
2661 for (i
= length
; (i
--, sublist
); sublist
= sublist
->next
)
2663 new_fnlist
->fn_fieldlist
.fn_fields
[i
] = sublist
->fn_field
;
2666 new_fnlist
->fn_fieldlist
.length
= length
;
2667 new_fnlist
->next
= fip
->fnlist
;
2668 fip
->fnlist
= new_fnlist
;
2675 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
2676 TYPE_FN_FIELDLISTS (type
) = (struct fn_fieldlist
*)
2677 TYPE_ALLOC (type
, sizeof (struct fn_fieldlist
) * nfn_fields
);
2678 memset (TYPE_FN_FIELDLISTS (type
), 0,
2679 sizeof (struct fn_fieldlist
) * nfn_fields
);
2680 TYPE_NFN_FIELDS (type
) = nfn_fields
;
2686 /* Special GNU C++ name.
2688 Returns 1 for success, 0 for failure. "failure" means that we can't
2689 keep parsing and it's time for error_type(). */
2692 read_cpp_abbrev (struct stab_field_info
*fip
, const char **pp
,
2693 struct type
*type
, struct objfile
*objfile
)
2698 struct type
*context
;
2708 /* At this point, *pp points to something like "22:23=*22...",
2709 where the type number before the ':' is the "context" and
2710 everything after is a regular type definition. Lookup the
2711 type, find it's name, and construct the field name. */
2713 context
= read_type (pp
, objfile
);
2717 case 'f': /* $vf -- a virtual function table pointer */
2718 name
= context
->name ();
2723 fip
->list
->field
.set_name (obconcat (&objfile
->objfile_obstack
,
2724 vptr_name
, name
, (char *) NULL
));
2727 case 'b': /* $vb -- a virtual bsomethingorother */
2728 name
= context
->name ();
2731 complaint (_("C++ abbreviated type name "
2732 "unknown at symtab pos %d"),
2736 fip
->list
->field
.set_name (obconcat (&objfile
->objfile_obstack
,
2737 vb_name
, name
, (char *) NULL
));
2741 invalid_cpp_abbrev_complaint (*pp
);
2742 fip
->list
->field
.set_name (obconcat (&objfile
->objfile_obstack
,
2743 "INVALID_CPLUSPLUS_ABBREV",
2748 /* At this point, *pp points to the ':'. Skip it and read the
2754 invalid_cpp_abbrev_complaint (*pp
);
2757 fip
->list
->field
.set_type (read_type (pp
, objfile
));
2759 (*pp
)++; /* Skip the comma. */
2766 fip
->list
->field
.set_loc_bitpos (read_huge_number (pp
, ';', &nbits
, 0));
2770 /* This field is unpacked. */
2771 FIELD_BITSIZE (fip
->list
->field
) = 0;
2772 fip
->list
->visibility
= VISIBILITY_PRIVATE
;
2776 invalid_cpp_abbrev_complaint (*pp
);
2777 /* We have no idea what syntax an unrecognized abbrev would have, so
2778 better return 0. If we returned 1, we would need to at least advance
2779 *pp to avoid an infinite loop. */
2786 read_one_struct_field (struct stab_field_info
*fip
, const char **pp
,
2787 const char *p
, struct type
*type
,
2788 struct objfile
*objfile
)
2790 struct gdbarch
*gdbarch
= objfile
->arch ();
2792 fip
->list
->field
.set_name
2793 (obstack_strndup (&objfile
->objfile_obstack
, *pp
, p
- *pp
));
2796 /* This means we have a visibility for a field coming. */
2800 fip
->list
->visibility
= *(*pp
)++;
2804 /* normal dbx-style format, no explicit visibility */
2805 fip
->list
->visibility
= VISIBILITY_PUBLIC
;
2808 fip
->list
->field
.set_type (read_type (pp
, objfile
));
2813 /* Possible future hook for nested types. */
2816 fip
->list
->field
.bitpos
= (long) -2; /* nested type */
2826 /* Static class member. */
2827 fip
->list
->field
.set_loc_physname (savestring (*pp
, p
- *pp
));
2831 else if (**pp
!= ',')
2833 /* Bad structure-type format. */
2834 stabs_general_complaint ("bad structure-type format");
2838 (*pp
)++; /* Skip the comma. */
2843 fip
->list
->field
.set_loc_bitpos (read_huge_number (pp
, ',', &nbits
, 0));
2846 stabs_general_complaint ("bad structure-type format");
2849 FIELD_BITSIZE (fip
->list
->field
) = read_huge_number (pp
, ';', &nbits
, 0);
2852 stabs_general_complaint ("bad structure-type format");
2857 if (fip
->list
->field
.loc_bitpos () == 0
2858 && FIELD_BITSIZE (fip
->list
->field
) == 0)
2860 /* This can happen in two cases: (1) at least for gcc 2.4.5 or so,
2861 it is a field which has been optimized out. The correct stab for
2862 this case is to use VISIBILITY_IGNORE, but that is a recent
2863 invention. (2) It is a 0-size array. For example
2864 union { int num; char str[0]; } foo. Printing _("<no value>" for
2865 str in "p foo" is OK, since foo.str (and thus foo.str[3])
2866 will continue to work, and a 0-size array as a whole doesn't
2867 have any contents to print.
2869 I suspect this probably could also happen with gcc -gstabs (not
2870 -gstabs+) for static fields, and perhaps other C++ extensions.
2871 Hopefully few people use -gstabs with gdb, since it is intended
2872 for dbx compatibility. */
2874 /* Ignore this field. */
2875 fip
->list
->visibility
= VISIBILITY_IGNORE
;
2879 /* Detect an unpacked field and mark it as such.
2880 dbx gives a bit size for all fields.
2881 Note that forward refs cannot be packed,
2882 and treat enums as if they had the width of ints. */
2884 struct type
*field_type
= check_typedef (fip
->list
->field
.type ());
2886 if (field_type
->code () != TYPE_CODE_INT
2887 && field_type
->code () != TYPE_CODE_RANGE
2888 && field_type
->code () != TYPE_CODE_BOOL
2889 && field_type
->code () != TYPE_CODE_ENUM
)
2891 FIELD_BITSIZE (fip
->list
->field
) = 0;
2893 if ((FIELD_BITSIZE (fip
->list
->field
)
2894 == TARGET_CHAR_BIT
* field_type
->length ()
2895 || (field_type
->code () == TYPE_CODE_ENUM
2896 && FIELD_BITSIZE (fip
->list
->field
)
2897 == gdbarch_int_bit (gdbarch
))
2900 fip
->list
->field
.loc_bitpos () % 8 == 0)
2902 FIELD_BITSIZE (fip
->list
->field
) = 0;
2908 /* Read struct or class data fields. They have the form:
2910 NAME : [VISIBILITY] TYPENUM , BITPOS , BITSIZE ;
2912 At the end, we see a semicolon instead of a field.
2914 In C++, this may wind up being NAME:?TYPENUM:PHYSNAME; for
2917 The optional VISIBILITY is one of:
2919 '/0' (VISIBILITY_PRIVATE)
2920 '/1' (VISIBILITY_PROTECTED)
2921 '/2' (VISIBILITY_PUBLIC)
2922 '/9' (VISIBILITY_IGNORE)
2924 or nothing, for C style fields with public visibility.
2926 Returns 1 for success, 0 for failure. */
2929 read_struct_fields (struct stab_field_info
*fip
, const char **pp
,
2930 struct type
*type
, struct objfile
*objfile
)
2933 struct stabs_nextfield
*newobj
;
2935 /* We better set p right now, in case there are no fields at all... */
2939 /* Read each data member type until we find the terminating ';' at the end of
2940 the data member list, or break for some other reason such as finding the
2941 start of the member function list. */
2942 /* Stab string for structure/union does not end with two ';' in
2943 SUN C compiler 5.3 i.e. F6U2, hence check for end of string. */
2945 while (**pp
!= ';' && **pp
!= '\0')
2947 STABS_CONTINUE (pp
, objfile
);
2948 /* Get space to record the next field's data. */
2949 newobj
= OBSTACK_ZALLOC (&fip
->obstack
, struct stabs_nextfield
);
2951 newobj
->next
= fip
->list
;
2954 /* Get the field name. */
2957 /* If is starts with CPLUS_MARKER it is a special abbreviation,
2958 unless the CPLUS_MARKER is followed by an underscore, in
2959 which case it is just the name of an anonymous type, which we
2960 should handle like any other type name. */
2962 if (is_cplus_marker (p
[0]) && p
[1] != '_')
2964 if (!read_cpp_abbrev (fip
, pp
, type
, objfile
))
2969 /* Look for the ':' that separates the field name from the field
2970 values. Data members are delimited by a single ':', while member
2971 functions are delimited by a pair of ':'s. When we hit the member
2972 functions (if any), terminate scan loop and return. */
2974 while (*p
!= ':' && *p
!= '\0')
2981 /* Check to see if we have hit the member functions yet. */
2986 read_one_struct_field (fip
, pp
, p
, type
, objfile
);
2988 if (p
[0] == ':' && p
[1] == ':')
2990 /* (the deleted) chill the list of fields: the last entry (at
2991 the head) is a partially constructed entry which we now
2993 fip
->list
= fip
->list
->next
;
2998 /* The stabs for C++ derived classes contain baseclass information which
2999 is marked by a '!' character after the total size. This function is
3000 called when we encounter the baseclass marker, and slurps up all the
3001 baseclass information.
3003 Immediately following the '!' marker is the number of base classes that
3004 the class is derived from, followed by information for each base class.
3005 For each base class, there are two visibility specifiers, a bit offset
3006 to the base class information within the derived class, a reference to
3007 the type for the base class, and a terminating semicolon.
3009 A typical example, with two base classes, would be "!2,020,19;0264,21;".
3011 Baseclass information marker __________________|| | | | | | |
3012 Number of baseclasses __________________________| | | | | | |
3013 Visibility specifiers (2) ________________________| | | | | |
3014 Offset in bits from start of class _________________| | | | |
3015 Type number for base class ___________________________| | | |
3016 Visibility specifiers (2) _______________________________| | |
3017 Offset in bits from start of class ________________________| |
3018 Type number of base class ____________________________________|
3020 Return 1 for success, 0 for (error-type-inducing) failure. */
3026 read_baseclasses (struct stab_field_info
*fip
, const char **pp
,
3027 struct type
*type
, struct objfile
*objfile
)
3030 struct stabs_nextfield
*newobj
;
3038 /* Skip the '!' baseclass information marker. */
3042 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
3046 TYPE_N_BASECLASSES (type
) = read_huge_number (pp
, ',', &nbits
, 0);
3052 /* Some stupid compilers have trouble with the following, so break
3053 it up into simpler expressions. */
3054 TYPE_FIELD_VIRTUAL_BITS (type
) = (B_TYPE
*)
3055 TYPE_ALLOC (type
, B_BYTES (TYPE_N_BASECLASSES (type
)));
3058 int num_bytes
= B_BYTES (TYPE_N_BASECLASSES (type
));
3061 pointer
= (char *) TYPE_ALLOC (type
, num_bytes
);
3062 TYPE_FIELD_VIRTUAL_BITS (type
) = (B_TYPE
*) pointer
;
3066 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type
), TYPE_N_BASECLASSES (type
));
3068 for (i
= 0; i
< TYPE_N_BASECLASSES (type
); i
++)
3070 newobj
= OBSTACK_ZALLOC (&fip
->obstack
, struct stabs_nextfield
);
3072 newobj
->next
= fip
->list
;
3074 FIELD_BITSIZE (newobj
->field
) = 0; /* This should be an unpacked
3077 STABS_CONTINUE (pp
, objfile
);
3081 /* Nothing to do. */
3084 SET_TYPE_FIELD_VIRTUAL (type
, i
);
3087 /* Unknown character. Complain and treat it as non-virtual. */
3089 complaint (_("Unknown virtual character `%c' for baseclass"),
3095 newobj
->visibility
= *(*pp
)++;
3096 switch (newobj
->visibility
)
3098 case VISIBILITY_PRIVATE
:
3099 case VISIBILITY_PROTECTED
:
3100 case VISIBILITY_PUBLIC
:
3103 /* Bad visibility format. Complain and treat it as
3106 complaint (_("Unknown visibility `%c' for baseclass"),
3107 newobj
->visibility
);
3108 newobj
->visibility
= VISIBILITY_PUBLIC
;
3115 /* The remaining value is the bit offset of the portion of the object
3116 corresponding to this baseclass. Always zero in the absence of
3117 multiple inheritance. */
3119 newobj
->field
.set_loc_bitpos (read_huge_number (pp
, ',', &nbits
, 0));
3124 /* The last piece of baseclass information is the type of the
3125 base class. Read it, and remember it's type name as this
3128 newobj
->field
.set_type (read_type (pp
, objfile
));
3129 newobj
->field
.set_name (newobj
->field
.type ()->name ());
3131 /* Skip trailing ';' and bump count of number of fields seen. */
3140 /* The tail end of stabs for C++ classes that contain a virtual function
3141 pointer contains a tilde, a %, and a type number.
3142 The type number refers to the base class (possibly this class itself) which
3143 contains the vtable pointer for the current class.
3145 This function is called when we have parsed all the method declarations,
3146 so we can look for the vptr base class info. */
3149 read_tilde_fields (struct stab_field_info
*fip
, const char **pp
,
3150 struct type
*type
, struct objfile
*objfile
)
3154 STABS_CONTINUE (pp
, objfile
);
3156 /* If we are positioned at a ';', then skip it. */
3166 if (**pp
== '=' || **pp
== '+' || **pp
== '-')
3168 /* Obsolete flags that used to indicate the presence
3169 of constructors and/or destructors. */
3173 /* Read either a '%' or the final ';'. */
3174 if (*(*pp
)++ == '%')
3176 /* The next number is the type number of the base class
3177 (possibly our own class) which supplies the vtable for
3178 this class. Parse it out, and search that class to find
3179 its vtable pointer, and install those into TYPE_VPTR_BASETYPE
3180 and TYPE_VPTR_FIELDNO. */
3185 t
= read_type (pp
, objfile
);
3187 while (*p
!= '\0' && *p
!= ';')
3193 /* Premature end of symbol. */
3197 set_type_vptr_basetype (type
, t
);
3198 if (type
== t
) /* Our own class provides vtbl ptr. */
3200 for (i
= t
->num_fields () - 1;
3201 i
>= TYPE_N_BASECLASSES (t
);
3204 const char *name
= t
->field (i
).name ();
3206 if (!strncmp (name
, vptr_name
, sizeof (vptr_name
) - 2)
3207 && is_cplus_marker (name
[sizeof (vptr_name
) - 2]))
3209 set_type_vptr_fieldno (type
, i
);
3213 /* Virtual function table field not found. */
3214 complaint (_("virtual function table pointer "
3215 "not found when defining class `%s'"),
3221 set_type_vptr_fieldno (type
, TYPE_VPTR_FIELDNO (t
));
3232 attach_fn_fields_to_type (struct stab_field_info
*fip
, struct type
*type
)
3236 for (n
= TYPE_NFN_FIELDS (type
);
3237 fip
->fnlist
!= NULL
;
3238 fip
->fnlist
= fip
->fnlist
->next
)
3240 --n
; /* Circumvent Sun3 compiler bug. */
3241 TYPE_FN_FIELDLISTS (type
)[n
] = fip
->fnlist
->fn_fieldlist
;
3246 /* Create the vector of fields, and record how big it is.
3247 We need this info to record proper virtual function table information
3248 for this class's virtual functions. */
3251 attach_fields_to_type (struct stab_field_info
*fip
, struct type
*type
,
3252 struct objfile
*objfile
)
3255 int non_public_fields
= 0;
3256 struct stabs_nextfield
*scan
;
3258 /* Count up the number of fields that we have, as well as taking note of
3259 whether or not there are any non-public fields, which requires us to
3260 allocate and build the private_field_bits and protected_field_bits
3263 for (scan
= fip
->list
; scan
!= NULL
; scan
= scan
->next
)
3266 if (scan
->visibility
!= VISIBILITY_PUBLIC
)
3268 non_public_fields
++;
3272 /* Now we know how many fields there are, and whether or not there are any
3273 non-public fields. Record the field count, allocate space for the
3274 array of fields, and create blank visibility bitfields if necessary. */
3276 type
->set_num_fields (nfields
);
3279 TYPE_ALLOC (type
, sizeof (struct field
) * nfields
));
3280 memset (type
->fields (), 0, sizeof (struct field
) * nfields
);
3282 if (non_public_fields
)
3284 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
3286 TYPE_FIELD_PRIVATE_BITS (type
) =
3287 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
3288 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type
), nfields
);
3290 TYPE_FIELD_PROTECTED_BITS (type
) =
3291 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
3292 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type
), nfields
);
3294 TYPE_FIELD_IGNORE_BITS (type
) =
3295 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
3296 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type
), nfields
);
3299 /* Copy the saved-up fields into the field vector. Start from the
3300 head of the list, adding to the tail of the field array, so that
3301 they end up in the same order in the array in which they were
3302 added to the list. */
3304 while (nfields
-- > 0)
3306 type
->field (nfields
) = fip
->list
->field
;
3307 switch (fip
->list
->visibility
)
3309 case VISIBILITY_PRIVATE
:
3310 SET_TYPE_FIELD_PRIVATE (type
, nfields
);
3313 case VISIBILITY_PROTECTED
:
3314 SET_TYPE_FIELD_PROTECTED (type
, nfields
);
3317 case VISIBILITY_IGNORE
:
3318 SET_TYPE_FIELD_IGNORE (type
, nfields
);
3321 case VISIBILITY_PUBLIC
:
3325 /* Unknown visibility. Complain and treat it as public. */
3327 complaint (_("Unknown visibility `%c' for field"),
3328 fip
->list
->visibility
);
3332 fip
->list
= fip
->list
->next
;
3338 /* Complain that the compiler has emitted more than one definition for the
3339 structure type TYPE. */
3341 complain_about_struct_wipeout (struct type
*type
)
3343 const char *name
= "";
3344 const char *kind
= "";
3348 name
= type
->name ();
3349 switch (type
->code ())
3351 case TYPE_CODE_STRUCT
: kind
= "struct "; break;
3352 case TYPE_CODE_UNION
: kind
= "union "; break;
3353 case TYPE_CODE_ENUM
: kind
= "enum "; break;
3363 complaint (_("struct/union type gets multiply defined: %s%s"), kind
, name
);
3366 /* Set the length for all variants of a same main_type, which are
3367 connected in the closed chain.
3369 This is something that needs to be done when a type is defined *after*
3370 some cross references to this type have already been read. Consider
3371 for instance the following scenario where we have the following two
3374 .stabs "t:p(0,21)=*(0,22)=k(0,23)=xsdummy:",160,0,28,-24
3375 .stabs "dummy:T(0,23)=s16x:(0,1),0,3[...]"
3377 A stubbed version of type dummy is created while processing the first
3378 stabs entry. The length of that type is initially set to zero, since
3379 it is unknown at this point. Also, a "constant" variation of type
3380 "dummy" is created as well (this is the "(0,22)=k(0,23)" section of
3383 The second stabs entry allows us to replace the stubbed definition
3384 with the real definition. However, we still need to adjust the length
3385 of the "constant" variation of that type, as its length was left
3386 untouched during the main type replacement... */
3389 set_length_in_type_chain (struct type
*type
)
3391 struct type
*ntype
= TYPE_CHAIN (type
);
3393 while (ntype
!= type
)
3395 if (ntype
->length () == 0)
3396 ntype
->set_length (type
->length ());
3398 complain_about_struct_wipeout (ntype
);
3399 ntype
= TYPE_CHAIN (ntype
);
3403 /* Read the description of a structure (or union type) and return an object
3404 describing the type.
3406 PP points to a character pointer that points to the next unconsumed token
3407 in the stabs string. For example, given stabs "A:T4=s4a:1,0,32;;",
3408 *PP will point to "4a:1,0,32;;".
3410 TYPE points to an incomplete type that needs to be filled in.
3412 OBJFILE points to the current objfile from which the stabs information is
3413 being read. (Note that it is redundant in that TYPE also contains a pointer
3414 to this same objfile, so it might be a good idea to eliminate it. FIXME).
3417 static struct type
*
3418 read_struct_type (const char **pp
, struct type
*type
, enum type_code type_code
,
3419 struct objfile
*objfile
)
3421 struct stab_field_info fi
;
3423 /* When describing struct/union/class types in stabs, G++ always drops
3424 all qualifications from the name. So if you've got:
3425 struct A { ... struct B { ... }; ... };
3426 then G++ will emit stabs for `struct A::B' that call it simply
3427 `struct B'. Obviously, if you've got a real top-level definition for
3428 `struct B', or other nested definitions, this is going to cause
3431 Obviously, GDB can't fix this by itself, but it can at least avoid
3432 scribbling on existing structure type objects when new definitions
3434 if (! (type
->code () == TYPE_CODE_UNDEF
3435 || type
->is_stub ()))
3437 complain_about_struct_wipeout (type
);
3439 /* It's probably best to return the type unchanged. */
3443 INIT_CPLUS_SPECIFIC (type
);
3444 type
->set_code (type_code
);
3445 type
->set_is_stub (false);
3447 /* First comes the total size in bytes. */
3452 type
->set_length (read_huge_number (pp
, 0, &nbits
, 0));
3454 return error_type (pp
, objfile
);
3455 set_length_in_type_chain (type
);
3458 /* Now read the baseclasses, if any, read the regular C struct or C++
3459 class member fields, attach the fields to the type, read the C++
3460 member functions, attach them to the type, and then read any tilde
3461 field (baseclass specifier for the class holding the main vtable). */
3463 if (!read_baseclasses (&fi
, pp
, type
, objfile
)
3464 || !read_struct_fields (&fi
, pp
, type
, objfile
)
3465 || !attach_fields_to_type (&fi
, type
, objfile
)
3466 || !read_member_functions (&fi
, pp
, type
, objfile
)
3467 || !attach_fn_fields_to_type (&fi
, type
)
3468 || !read_tilde_fields (&fi
, pp
, type
, objfile
))
3470 type
= error_type (pp
, objfile
);
3476 /* Read a definition of an array type,
3477 and create and return a suitable type object.
3478 Also creates a range type which represents the bounds of that
3481 static struct type
*
3482 read_array_type (const char **pp
, struct type
*type
,
3483 struct objfile
*objfile
)
3485 struct type
*index_type
, *element_type
, *range_type
;
3490 /* Format of an array type:
3491 "ar<index type>;lower;upper;<array_contents_type>".
3492 OS9000: "arlower,upper;<array_contents_type>".
3494 Fortran adjustable arrays use Adigits or Tdigits for lower or upper;
3495 for these, produce a type like float[][]. */
3498 index_type
= read_type (pp
, objfile
);
3500 /* Improper format of array type decl. */
3501 return error_type (pp
, objfile
);
3505 if (!(**pp
>= '0' && **pp
<= '9') && **pp
!= '-')
3510 lower
= read_huge_number (pp
, ';', &nbits
, 0);
3513 return error_type (pp
, objfile
);
3515 if (!(**pp
>= '0' && **pp
<= '9') && **pp
!= '-')
3520 upper
= read_huge_number (pp
, ';', &nbits
, 0);
3522 return error_type (pp
, objfile
);
3524 element_type
= read_type (pp
, objfile
);
3533 create_static_range_type (NULL
, index_type
, lower
, upper
);
3534 type
= create_array_type (type
, element_type
, range_type
);
3540 /* Read a definition of an enumeration type,
3541 and create and return a suitable type object.
3542 Also defines the symbols that represent the values of the type. */
3544 static struct type
*
3545 read_enum_type (const char **pp
, struct type
*type
,
3546 struct objfile
*objfile
)
3548 struct gdbarch
*gdbarch
= objfile
->arch ();
3554 struct pending
**symlist
;
3555 struct pending
*osyms
, *syms
;
3558 int unsigned_enum
= 1;
3561 /* FIXME! The stabs produced by Sun CC merrily define things that ought
3562 to be file-scope, between N_FN entries, using N_LSYM. What's a mother
3563 to do? For now, force all enum values to file scope. */
3564 if (within_function
)
3565 symlist
= get_local_symbols ();
3568 symlist
= get_file_symbols ();
3570 o_nsyms
= osyms
? osyms
->nsyms
: 0;
3572 /* The aix4 compiler emits an extra field before the enum members;
3573 my guess is it's a type of some sort. Just ignore it. */
3576 /* Skip over the type. */
3580 /* Skip over the colon. */
3584 /* Read the value-names and their values.
3585 The input syntax is NAME:VALUE,NAME:VALUE, and so on.
3586 A semicolon or comma instead of a NAME means the end. */
3587 while (**pp
&& **pp
!= ';' && **pp
!= ',')
3589 STABS_CONTINUE (pp
, objfile
);
3593 name
= obstack_strndup (&objfile
->objfile_obstack
, *pp
, p
- *pp
);
3595 n
= read_huge_number (pp
, ',', &nbits
, 0);
3597 return error_type (pp
, objfile
);
3599 sym
= new (&objfile
->objfile_obstack
) symbol
;
3600 sym
->set_linkage_name (name
);
3601 sym
->set_language (get_current_subfile ()->language
,
3602 &objfile
->objfile_obstack
);
3603 sym
->set_aclass_index (LOC_CONST
);
3604 sym
->set_domain (VAR_DOMAIN
);
3605 sym
->set_value_longest (n
);
3608 add_symbol_to_list (sym
, symlist
);
3613 (*pp
)++; /* Skip the semicolon. */
3615 /* Now fill in the fields of the type-structure. */
3617 type
->set_length (gdbarch_int_bit (gdbarch
) / HOST_CHAR_BIT
);
3618 set_length_in_type_chain (type
);
3619 type
->set_code (TYPE_CODE_ENUM
);
3620 type
->set_is_stub (false);
3622 type
->set_is_unsigned (true);
3623 type
->set_num_fields (nsyms
);
3626 TYPE_ALLOC (type
, sizeof (struct field
) * nsyms
));
3627 memset (type
->fields (), 0, sizeof (struct field
) * nsyms
);
3629 /* Find the symbols for the values and put them into the type.
3630 The symbols can be found in the symlist that we put them on
3631 to cause them to be defined. osyms contains the old value
3632 of that symlist; everything up to there was defined by us. */
3633 /* Note that we preserve the order of the enum constants, so
3634 that in something like "enum {FOO, LAST_THING=FOO}" we print
3635 FOO, not LAST_THING. */
3637 for (syms
= *symlist
, n
= nsyms
- 1; syms
; syms
= syms
->next
)
3639 int last
= syms
== osyms
? o_nsyms
: 0;
3640 int j
= syms
->nsyms
;
3642 for (; --j
>= last
; --n
)
3644 struct symbol
*xsym
= syms
->symbol
[j
];
3646 xsym
->set_type (type
);
3647 type
->field (n
).set_name (xsym
->linkage_name ());
3648 type
->field (n
).set_loc_enumval (xsym
->value_longest ());
3649 TYPE_FIELD_BITSIZE (type
, n
) = 0;
3658 /* Sun's ACC uses a somewhat saner method for specifying the builtin
3659 typedefs in every file (for int, long, etc):
3661 type = b <signed> <width> <format type>; <offset>; <nbits>
3663 optional format type = c or b for char or boolean.
3664 offset = offset from high order bit to start bit of type.
3665 width is # bytes in object of this type, nbits is # bits in type.
3667 The width/offset stuff appears to be for small objects stored in
3668 larger ones (e.g. `shorts' in `int' registers). We ignore it for now,
3671 static struct type
*
3672 read_sun_builtin_type (const char **pp
, int typenums
[2], struct objfile
*objfile
)
3677 int boolean_type
= 0;
3688 return error_type (pp
, objfile
);
3692 /* For some odd reason, all forms of char put a c here. This is strange
3693 because no other type has this honor. We can safely ignore this because
3694 we actually determine 'char'acterness by the number of bits specified in
3696 Boolean forms, e.g Fortran logical*X, put a b here. */
3700 else if (**pp
== 'b')
3706 /* The first number appears to be the number of bytes occupied
3707 by this type, except that unsigned short is 4 instead of 2.
3708 Since this information is redundant with the third number,
3709 we will ignore it. */
3710 read_huge_number (pp
, ';', &nbits
, 0);
3712 return error_type (pp
, objfile
);
3714 /* The second number is always 0, so ignore it too. */
3715 read_huge_number (pp
, ';', &nbits
, 0);
3717 return error_type (pp
, objfile
);
3719 /* The third number is the number of bits for this type. */
3720 type_bits
= read_huge_number (pp
, 0, &nbits
, 0);
3722 return error_type (pp
, objfile
);
3723 /* The type *should* end with a semicolon. If it are embedded
3724 in a larger type the semicolon may be the only way to know where
3725 the type ends. If this type is at the end of the stabstring we
3726 can deal with the omitted semicolon (but we don't have to like
3727 it). Don't bother to complain(), Sun's compiler omits the semicolon
3734 struct type
*type
= init_type (objfile
, TYPE_CODE_VOID
,
3735 TARGET_CHAR_BIT
, NULL
);
3737 type
->set_is_unsigned (true);
3743 return init_boolean_type (objfile
, type_bits
, unsigned_type
, NULL
);
3745 return init_integer_type (objfile
, type_bits
, unsigned_type
, NULL
);
3748 static struct type
*
3749 read_sun_floating_type (const char **pp
, int typenums
[2],
3750 struct objfile
*objfile
)
3755 struct type
*rettype
;
3757 /* The first number has more details about the type, for example
3759 details
= read_huge_number (pp
, ';', &nbits
, 0);
3761 return error_type (pp
, objfile
);
3763 /* The second number is the number of bytes occupied by this type. */
3764 nbytes
= read_huge_number (pp
, ';', &nbits
, 0);
3766 return error_type (pp
, objfile
);
3768 nbits
= nbytes
* TARGET_CHAR_BIT
;
3770 if (details
== NF_COMPLEX
|| details
== NF_COMPLEX16
3771 || details
== NF_COMPLEX32
)
3773 rettype
= dbx_init_float_type (objfile
, nbits
/ 2);
3774 return init_complex_type (NULL
, rettype
);
3777 return dbx_init_float_type (objfile
, nbits
);
3780 /* Read a number from the string pointed to by *PP.
3781 The value of *PP is advanced over the number.
3782 If END is nonzero, the character that ends the
3783 number must match END, or an error happens;
3784 and that character is skipped if it does match.
3785 If END is zero, *PP is left pointing to that character.
3787 If TWOS_COMPLEMENT_BITS is set to a strictly positive value and if
3788 the number is represented in an octal representation, assume that
3789 it is represented in a 2's complement representation with a size of
3790 TWOS_COMPLEMENT_BITS.
3792 If the number fits in a long, set *BITS to 0 and return the value.
3793 If not, set *BITS to be the number of bits in the number and return 0.
3795 If encounter garbage, set *BITS to -1 and return 0. */
3798 read_huge_number (const char **pp
, int end
, int *bits
,
3799 int twos_complement_bits
)
3801 const char *p
= *pp
;
3810 int twos_complement_representation
= 0;
3818 /* Leading zero means octal. GCC uses this to output values larger
3819 than an int (because that would be hard in decimal). */
3826 /* Skip extra zeros. */
3830 if (sign
> 0 && radix
== 8 && twos_complement_bits
> 0)
3832 /* Octal, possibly signed. Check if we have enough chars for a
3838 while ((c
= *p1
) >= '0' && c
< '8')
3842 if (len
> twos_complement_bits
/ 3
3843 || (twos_complement_bits
% 3 == 0
3844 && len
== twos_complement_bits
/ 3))
3846 /* Ok, we have enough characters for a signed value, check
3847 for signedness by testing if the sign bit is set. */
3848 sign_bit
= (twos_complement_bits
% 3 + 2) % 3;
3850 if (c
& (1 << sign_bit
))
3852 /* Definitely signed. */
3853 twos_complement_representation
= 1;
3859 upper_limit
= LONG_MAX
/ radix
;
3861 while ((c
= *p
++) >= '0' && c
< ('0' + radix
))
3863 if (n
<= upper_limit
)
3865 if (twos_complement_representation
)
3867 /* Octal, signed, twos complement representation. In
3868 this case, n is the corresponding absolute value. */
3871 long sn
= c
- '0' - ((2 * (c
- '0')) | (2 << sign_bit
));
3883 /* unsigned representation */
3885 n
+= c
- '0'; /* FIXME this overflows anyway. */
3891 /* This depends on large values being output in octal, which is
3898 /* Ignore leading zeroes. */
3902 else if (c
== '2' || c
== '3')
3923 if (radix
== 8 && twos_complement_bits
> 0 && nbits
> twos_complement_bits
)
3925 /* We were supposed to parse a number with maximum
3926 TWOS_COMPLEMENT_BITS bits, but something went wrong. */
3937 /* Large decimal constants are an error (because it is hard to
3938 count how many bits are in them). */
3944 /* -0x7f is the same as 0x80. So deal with it by adding one to
3945 the number of bits. Two's complement represention octals
3946 can't have a '-' in front. */
3947 if (sign
== -1 && !twos_complement_representation
)
3958 /* It's *BITS which has the interesting information. */
3962 static struct type
*
3963 read_range_type (const char **pp
, int typenums
[2], int type_size
,
3964 struct objfile
*objfile
)
3966 struct gdbarch
*gdbarch
= objfile
->arch ();
3967 const char *orig_pp
= *pp
;
3972 struct type
*result_type
;
3973 struct type
*index_type
= NULL
;
3975 /* First comes a type we are a subrange of.
3976 In C it is usually 0, 1 or the type being defined. */
3977 if (read_type_number (pp
, rangenums
) != 0)
3978 return error_type (pp
, objfile
);
3979 self_subrange
= (rangenums
[0] == typenums
[0] &&
3980 rangenums
[1] == typenums
[1]);
3985 index_type
= read_type (pp
, objfile
);
3988 /* A semicolon should now follow; skip it. */
3992 /* The remaining two operands are usually lower and upper bounds
3993 of the range. But in some special cases they mean something else. */
3994 n2
= read_huge_number (pp
, ';', &n2bits
, type_size
);
3995 n3
= read_huge_number (pp
, ';', &n3bits
, type_size
);
3997 if (n2bits
== -1 || n3bits
== -1)
3998 return error_type (pp
, objfile
);
4001 goto handle_true_range
;
4003 /* If limits are huge, must be large integral type. */
4004 if (n2bits
!= 0 || n3bits
!= 0)
4006 char got_signed
= 0;
4007 char got_unsigned
= 0;
4008 /* Number of bits in the type. */
4011 /* If a type size attribute has been specified, the bounds of
4012 the range should fit in this size. If the lower bounds needs
4013 more bits than the upper bound, then the type is signed. */
4014 if (n2bits
<= type_size
&& n3bits
<= type_size
)
4016 if (n2bits
== type_size
&& n2bits
> n3bits
)
4022 /* Range from 0 to <large number> is an unsigned large integral type. */
4023 else if ((n2bits
== 0 && n2
== 0) && n3bits
!= 0)
4028 /* Range from <large number> to <large number>-1 is a large signed
4029 integral type. Take care of the case where <large number> doesn't
4030 fit in a long but <large number>-1 does. */
4031 else if ((n2bits
!= 0 && n3bits
!= 0 && n2bits
== n3bits
+ 1)
4032 || (n2bits
!= 0 && n3bits
== 0
4033 && (n2bits
== sizeof (long) * HOST_CHAR_BIT
)
4040 if (got_signed
|| got_unsigned
)
4041 return init_integer_type (objfile
, nbits
, got_unsigned
, NULL
);
4043 return error_type (pp
, objfile
);
4046 /* A type defined as a subrange of itself, with bounds both 0, is void. */
4047 if (self_subrange
&& n2
== 0 && n3
== 0)
4048 return init_type (objfile
, TYPE_CODE_VOID
, TARGET_CHAR_BIT
, NULL
);
4050 /* If n3 is zero and n2 is positive, we want a floating type, and n2
4051 is the width in bytes.
4053 Fortran programs appear to use this for complex types also. To
4054 distinguish between floats and complex, g77 (and others?) seem
4055 to use self-subranges for the complexes, and subranges of int for
4058 Also note that for complexes, g77 sets n2 to the size of one of
4059 the member floats, not the whole complex beast. My guess is that
4060 this was to work well with pre-COMPLEX versions of gdb. */
4062 if (n3
== 0 && n2
> 0)
4064 struct type
*float_type
4065 = dbx_init_float_type (objfile
, n2
* TARGET_CHAR_BIT
);
4068 return init_complex_type (NULL
, float_type
);
4073 /* If the upper bound is -1, it must really be an unsigned integral. */
4075 else if (n2
== 0 && n3
== -1)
4077 int bits
= type_size
;
4081 /* We don't know its size. It is unsigned int or unsigned
4082 long. GCC 2.3.3 uses this for long long too, but that is
4083 just a GDB 3.5 compatibility hack. */
4084 bits
= gdbarch_int_bit (gdbarch
);
4087 return init_integer_type (objfile
, bits
, 1, NULL
);
4090 /* Special case: char is defined (Who knows why) as a subrange of
4091 itself with range 0-127. */
4092 else if (self_subrange
&& n2
== 0 && n3
== 127)
4094 struct type
*type
= init_integer_type (objfile
, TARGET_CHAR_BIT
,
4096 type
->set_has_no_signedness (true);
4099 /* We used to do this only for subrange of self or subrange of int. */
4102 /* -1 is used for the upper bound of (4 byte) "unsigned int" and
4103 "unsigned long", and we already checked for that,
4104 so don't need to test for it here. */
4107 /* n3 actually gives the size. */
4108 return init_integer_type (objfile
, -n3
* TARGET_CHAR_BIT
, 1, NULL
);
4110 /* Is n3 == 2**(8n)-1 for some integer n? Then it's an
4111 unsigned n-byte integer. But do require n to be a power of
4112 two; we don't want 3- and 5-byte integers flying around. */
4118 for (bytes
= 0; (bits
& 0xff) == 0xff; bytes
++)
4121 && ((bytes
- 1) & bytes
) == 0) /* "bytes is a power of two" */
4122 return init_integer_type (objfile
, bytes
* TARGET_CHAR_BIT
, 1, NULL
);
4125 /* I think this is for Convex "long long". Since I don't know whether
4126 Convex sets self_subrange, I also accept that particular size regardless
4127 of self_subrange. */
4128 else if (n3
== 0 && n2
< 0
4130 || n2
== -gdbarch_long_long_bit
4131 (gdbarch
) / TARGET_CHAR_BIT
))
4132 return init_integer_type (objfile
, -n2
* TARGET_CHAR_BIT
, 0, NULL
);
4133 else if (n2
== -n3
- 1)
4136 return init_integer_type (objfile
, 8, 0, NULL
);
4138 return init_integer_type (objfile
, 16, 0, NULL
);
4139 if (n3
== 0x7fffffff)
4140 return init_integer_type (objfile
, 32, 0, NULL
);
4143 /* We have a real range type on our hands. Allocate space and
4144 return a real pointer. */
4148 index_type
= objfile_type (objfile
)->builtin_int
;
4150 index_type
= *dbx_lookup_type (rangenums
, objfile
);
4151 if (index_type
== NULL
)
4153 /* Does this actually ever happen? Is that why we are worrying
4154 about dealing with it rather than just calling error_type? */
4156 complaint (_("base type %d of range type is not defined"), rangenums
[1]);
4158 index_type
= objfile_type (objfile
)->builtin_int
;
4162 = create_static_range_type (NULL
, index_type
, n2
, n3
);
4163 return (result_type
);
4166 /* Read in an argument list. This is a list of types, separated by commas
4167 and terminated with END. Return the list of types read in, or NULL
4168 if there is an error. */
4170 static struct field
*
4171 read_args (const char **pp
, int end
, struct objfile
*objfile
, int *nargsp
,
4174 /* FIXME! Remove this arbitrary limit! */
4175 struct type
*types
[1024]; /* Allow for fns of 1023 parameters. */
4182 /* Invalid argument list: no ','. */
4185 STABS_CONTINUE (pp
, objfile
);
4186 types
[n
++] = read_type (pp
, objfile
);
4188 (*pp
)++; /* get past `end' (the ':' character). */
4192 /* We should read at least the THIS parameter here. Some broken stabs
4193 output contained `(0,41),(0,42)=@s8;-16;,(0,43),(0,1);' where should
4194 have been present ";-16,(0,43)" reference instead. This way the
4195 excessive ";" marker prematurely stops the parameters parsing. */
4197 complaint (_("Invalid (empty) method arguments"));
4200 else if (types
[n
- 1]->code () != TYPE_CODE_VOID
)
4208 rval
= XCNEWVEC (struct field
, n
);
4209 for (i
= 0; i
< n
; i
++)
4210 rval
[i
].set_type (types
[i
]);
4215 /* Common block handling. */
4217 /* List of symbols declared since the last BCOMM. This list is a tail
4218 of local_symbols. When ECOMM is seen, the symbols on the list
4219 are noted so their proper addresses can be filled in later,
4220 using the common block base address gotten from the assembler
4223 static struct pending
*common_block
;
4224 static int common_block_i
;
4226 /* Name of the current common block. We get it from the BCOMM instead of the
4227 ECOMM to match IBM documentation (even though IBM puts the name both places
4228 like everyone else). */
4229 static char *common_block_name
;
4231 /* Process a N_BCOMM symbol. The storage for NAME is not guaranteed
4232 to remain after this function returns. */
4235 common_block_start (const char *name
, struct objfile
*objfile
)
4237 if (common_block_name
!= NULL
)
4239 complaint (_("Invalid symbol data: common block within common block"));
4241 common_block
= *get_local_symbols ();
4242 common_block_i
= common_block
? common_block
->nsyms
: 0;
4243 common_block_name
= obstack_strdup (&objfile
->objfile_obstack
, name
);
4246 /* Process a N_ECOMM symbol. */
4249 common_block_end (struct objfile
*objfile
)
4251 /* Symbols declared since the BCOMM are to have the common block
4252 start address added in when we know it. common_block and
4253 common_block_i point to the first symbol after the BCOMM in
4254 the local_symbols list; copy the list and hang it off the
4255 symbol for the common block name for later fixup. */
4258 struct pending
*newobj
= 0;
4259 struct pending
*next
;
4262 if (common_block_name
== NULL
)
4264 complaint (_("ECOMM symbol unmatched by BCOMM"));
4268 sym
= new (&objfile
->objfile_obstack
) symbol
;
4269 /* Note: common_block_name already saved on objfile_obstack. */
4270 sym
->set_linkage_name (common_block_name
);
4271 sym
->set_aclass_index (LOC_BLOCK
);
4273 /* Now we copy all the symbols which have been defined since the BCOMM. */
4275 /* Copy all the struct pendings before common_block. */
4276 for (next
= *get_local_symbols ();
4277 next
!= NULL
&& next
!= common_block
;
4280 for (j
= 0; j
< next
->nsyms
; j
++)
4281 add_symbol_to_list (next
->symbol
[j
], &newobj
);
4284 /* Copy however much of COMMON_BLOCK we need. If COMMON_BLOCK is
4285 NULL, it means copy all the local symbols (which we already did
4288 if (common_block
!= NULL
)
4289 for (j
= common_block_i
; j
< common_block
->nsyms
; j
++)
4290 add_symbol_to_list (common_block
->symbol
[j
], &newobj
);
4292 sym
->set_type ((struct type
*) newobj
);
4294 /* Should we be putting local_symbols back to what it was?
4297 i
= hashname (sym
->linkage_name ());
4298 sym
->set_value_chain (global_sym_chain
[i
]);
4299 global_sym_chain
[i
] = sym
;
4300 common_block_name
= NULL
;
4303 /* Add a common block's start address to the offset of each symbol
4304 declared to be in it (by being between a BCOMM/ECOMM pair that uses
4305 the common block name). */
4308 fix_common_block (struct symbol
*sym
, CORE_ADDR valu
)
4310 struct pending
*next
= (struct pending
*) sym
->type ();
4312 for (; next
; next
= next
->next
)
4316 for (j
= next
->nsyms
- 1; j
>= 0; j
--)
4317 next
->symbol
[j
]->set_value_address
4318 (next
->symbol
[j
]->value_address () + valu
);
4324 /* Add {TYPE, TYPENUMS} to the NONAME_UNDEFS vector.
4325 See add_undefined_type for more details. */
4328 add_undefined_type_noname (struct type
*type
, int typenums
[2])
4332 nat
.typenums
[0] = typenums
[0];
4333 nat
.typenums
[1] = typenums
[1];
4336 if (noname_undefs_length
== noname_undefs_allocated
)
4338 noname_undefs_allocated
*= 2;
4339 noname_undefs
= (struct nat
*)
4340 xrealloc ((char *) noname_undefs
,
4341 noname_undefs_allocated
* sizeof (struct nat
));
4343 noname_undefs
[noname_undefs_length
++] = nat
;
4346 /* Add TYPE to the UNDEF_TYPES vector.
4347 See add_undefined_type for more details. */
4350 add_undefined_type_1 (struct type
*type
)
4352 if (undef_types_length
== undef_types_allocated
)
4354 undef_types_allocated
*= 2;
4355 undef_types
= (struct type
**)
4356 xrealloc ((char *) undef_types
,
4357 undef_types_allocated
* sizeof (struct type
*));
4359 undef_types
[undef_types_length
++] = type
;
4362 /* What about types defined as forward references inside of a small lexical
4364 /* Add a type to the list of undefined types to be checked through
4365 once this file has been read in.
4367 In practice, we actually maintain two such lists: The first list
4368 (UNDEF_TYPES) is used for types whose name has been provided, and
4369 concerns forward references (eg 'xs' or 'xu' forward references);
4370 the second list (NONAME_UNDEFS) is used for types whose name is
4371 unknown at creation time, because they were referenced through
4372 their type number before the actual type was declared.
4373 This function actually adds the given type to the proper list. */
4376 add_undefined_type (struct type
*type
, int typenums
[2])
4378 if (type
->name () == NULL
)
4379 add_undefined_type_noname (type
, typenums
);
4381 add_undefined_type_1 (type
);
4384 /* Try to fix all undefined types pushed on the UNDEF_TYPES vector. */
4387 cleanup_undefined_types_noname (struct objfile
*objfile
)
4391 for (i
= 0; i
< noname_undefs_length
; i
++)
4393 struct nat nat
= noname_undefs
[i
];
4396 type
= dbx_lookup_type (nat
.typenums
, objfile
);
4397 if (nat
.type
!= *type
&& (*type
)->code () != TYPE_CODE_UNDEF
)
4399 /* The instance flags of the undefined type are still unset,
4400 and needs to be copied over from the reference type.
4401 Since replace_type expects them to be identical, we need
4402 to set these flags manually before hand. */
4403 nat
.type
->set_instance_flags ((*type
)->instance_flags ());
4404 replace_type (nat
.type
, *type
);
4408 noname_undefs_length
= 0;
4411 /* Go through each undefined type, see if it's still undefined, and fix it
4412 up if possible. We have two kinds of undefined types:
4414 TYPE_CODE_ARRAY: Array whose target type wasn't defined yet.
4415 Fix: update array length using the element bounds
4416 and the target type's length.
4417 TYPE_CODE_STRUCT, TYPE_CODE_UNION: Structure whose fields were not
4418 yet defined at the time a pointer to it was made.
4419 Fix: Do a full lookup on the struct/union tag. */
4422 cleanup_undefined_types_1 (void)
4426 /* Iterate over every undefined type, and look for a symbol whose type
4427 matches our undefined type. The symbol matches if:
4428 1. It is a typedef in the STRUCT domain;
4429 2. It has the same name, and same type code;
4430 3. The instance flags are identical.
4432 It is important to check the instance flags, because we have seen
4433 examples where the debug info contained definitions such as:
4435 "foo_t:t30=B31=xefoo_t:"
4437 In this case, we have created an undefined type named "foo_t" whose
4438 instance flags is null (when processing "xefoo_t"), and then created
4439 another type with the same name, but with different instance flags
4440 ('B' means volatile). I think that the definition above is wrong,
4441 since the same type cannot be volatile and non-volatile at the same
4442 time, but we need to be able to cope with it when it happens. The
4443 approach taken here is to treat these two types as different. */
4445 for (type
= undef_types
; type
< undef_types
+ undef_types_length
; type
++)
4447 switch ((*type
)->code ())
4450 case TYPE_CODE_STRUCT
:
4451 case TYPE_CODE_UNION
:
4452 case TYPE_CODE_ENUM
:
4454 /* Check if it has been defined since. Need to do this here
4455 as well as in check_typedef to deal with the (legitimate in
4456 C though not C++) case of several types with the same name
4457 in different source files. */
4458 if ((*type
)->is_stub ())
4460 struct pending
*ppt
;
4462 /* Name of the type, without "struct" or "union". */
4463 const char *type_name
= (*type
)->name ();
4465 if (type_name
== NULL
)
4467 complaint (_("need a type name"));
4470 for (ppt
= *get_file_symbols (); ppt
; ppt
= ppt
->next
)
4472 for (i
= 0; i
< ppt
->nsyms
; i
++)
4474 struct symbol
*sym
= ppt
->symbol
[i
];
4476 if (sym
->aclass () == LOC_TYPEDEF
4477 && sym
->domain () == STRUCT_DOMAIN
4478 && (sym
->type ()->code () == (*type
)->code ())
4479 && ((*type
)->instance_flags ()
4480 == sym
->type ()->instance_flags ())
4481 && strcmp (sym
->linkage_name (), type_name
) == 0)
4482 replace_type (*type
, sym
->type ());
4491 complaint (_("forward-referenced types left unresolved, "
4499 undef_types_length
= 0;
4502 /* Try to fix all the undefined types we encountered while processing
4506 cleanup_undefined_stabs_types (struct objfile
*objfile
)
4508 cleanup_undefined_types_1 ();
4509 cleanup_undefined_types_noname (objfile
);
4512 /* See stabsread.h. */
4515 scan_file_globals (struct objfile
*objfile
)
4518 struct symbol
*sym
, *prev
;
4519 struct objfile
*resolve_objfile
;
4521 /* SVR4 based linkers copy referenced global symbols from shared
4522 libraries to the main executable.
4523 If we are scanning the symbols for a shared library, try to resolve
4524 them from the minimal symbols of the main executable first. */
4526 if (current_program_space
->symfile_object_file
4527 && objfile
!= current_program_space
->symfile_object_file
)
4528 resolve_objfile
= current_program_space
->symfile_object_file
;
4530 resolve_objfile
= objfile
;
4534 /* Avoid expensive loop through all minimal symbols if there are
4535 no unresolved symbols. */
4536 for (hash
= 0; hash
< HASHSIZE
; hash
++)
4538 if (global_sym_chain
[hash
])
4541 if (hash
>= HASHSIZE
)
4544 for (minimal_symbol
*msymbol
: resolve_objfile
->msymbols ())
4548 /* Skip static symbols. */
4549 switch (msymbol
->type ())
4561 /* Get the hash index and check all the symbols
4562 under that hash index. */
4564 hash
= hashname (msymbol
->linkage_name ());
4566 for (sym
= global_sym_chain
[hash
]; sym
;)
4568 if (strcmp (msymbol
->linkage_name (), sym
->linkage_name ()) == 0)
4570 /* Splice this symbol out of the hash chain and
4571 assign the value we have to it. */
4574 prev
->set_value_chain (sym
->value_chain ());
4578 global_sym_chain
[hash
] = sym
->value_chain ();
4581 /* Check to see whether we need to fix up a common block. */
4582 /* Note: this code might be executed several times for
4583 the same symbol if there are multiple references. */
4586 if (sym
->aclass () == LOC_BLOCK
)
4588 (sym
, msymbol
->value_address (resolve_objfile
));
4590 sym
->set_value_address
4591 (msymbol
->value_address (resolve_objfile
));
4592 sym
->set_section_index (msymbol
->section_index ());
4597 sym
= prev
->value_chain ();
4601 sym
= global_sym_chain
[hash
];
4607 sym
= sym
->value_chain ();
4611 if (resolve_objfile
== objfile
)
4613 resolve_objfile
= objfile
;
4616 /* Change the storage class of any remaining unresolved globals to
4617 LOC_UNRESOLVED and remove them from the chain. */
4618 for (hash
= 0; hash
< HASHSIZE
; hash
++)
4620 sym
= global_sym_chain
[hash
];
4624 sym
= sym
->value_chain ();
4626 /* Change the symbol address from the misleading chain value
4628 prev
->set_value_address (0);
4630 /* Complain about unresolved common block symbols. */
4631 if (prev
->aclass () == LOC_STATIC
)
4632 prev
->set_aclass_index (LOC_UNRESOLVED
);
4634 complaint (_("%s: common block `%s' from "
4635 "global_sym_chain unresolved"),
4636 objfile_name (objfile
), prev
->print_name ());
4639 memset (global_sym_chain
, 0, sizeof (global_sym_chain
));
4642 /* Initialize anything that needs initializing when starting to read
4643 a fresh piece of a symbol file, e.g. reading in the stuff corresponding
4647 stabsread_init (void)
4651 /* Initialize anything that needs initializing when a completely new
4652 symbol file is specified (not just adding some symbols from another
4653 file, e.g. a shared library). */
4656 stabsread_new_init (void)
4658 /* Empty the hash table of global syms looking for values. */
4659 memset (global_sym_chain
, 0, sizeof (global_sym_chain
));
4662 /* Initialize anything that needs initializing at the same time as
4663 start_compunit_symtab() is called. */
4668 global_stabs
= NULL
; /* AIX COFF */
4669 /* Leave FILENUM of 0 free for builtin types and this file's types. */
4670 n_this_object_header_files
= 1;
4671 type_vector_length
= 0;
4672 type_vector
= (struct type
**) 0;
4673 within_function
= 0;
4675 /* FIXME: If common_block_name is not already NULL, we should complain(). */
4676 common_block_name
= NULL
;
4679 /* Call after end_compunit_symtab(). */
4686 xfree (type_vector
);
4689 type_vector_length
= 0;
4690 previous_stab_code
= 0;
4694 finish_global_stabs (struct objfile
*objfile
)
4698 patch_block_stabs (*get_global_symbols (), global_stabs
, objfile
);
4699 xfree (global_stabs
);
4700 global_stabs
= NULL
;
4704 /* Find the end of the name, delimited by a ':', but don't match
4705 ObjC symbols which look like -[Foo bar::]:bla. */
4707 find_name_end (const char *name
)
4709 const char *s
= name
;
4711 if (s
[0] == '-' || *s
== '+')
4713 /* Must be an ObjC method symbol. */
4716 error (_("invalid symbol name \"%s\""), name
);
4718 s
= strchr (s
, ']');
4721 error (_("invalid symbol name \"%s\""), name
);
4723 return strchr (s
, ':');
4727 return strchr (s
, ':');
4731 /* See stabsread.h. */
4734 hashname (const char *name
)
4736 return fast_hash (name
, strlen (name
)) % HASHSIZE
;
4739 /* Initializer for this module. */
4741 void _initialize_stabsread ();
4743 _initialize_stabsread ()
4745 undef_types_allocated
= 20;
4746 undef_types_length
= 0;
4747 undef_types
= XNEWVEC (struct type
*, undef_types_allocated
);
4749 noname_undefs_allocated
= 20;
4750 noname_undefs_length
= 0;
4751 noname_undefs
= XNEWVEC (struct nat
, noname_undefs_allocated
);
4753 stab_register_index
= register_symbol_register_impl (LOC_REGISTER
,
4754 &stab_register_funcs
);
4755 stab_regparm_index
= register_symbol_register_impl (LOC_REGPARM_ADDR
,
4756 &stab_register_funcs
);