1 /* Support routines for decoding "stabs" debugging information format.
3 Copyright (C) 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995,
4 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007
5 Free Software Foundation, Inc.
7 This file is part of GDB.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 2 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program; if not, write to the Free Software
21 Foundation, Inc., 51 Franklin Street, Fifth Floor,
22 Boston, MA 02110-1301, USA. */
24 /* Support routines for reading and decoding debugging information in
25 the "stabs" format. This format is used with many systems that use
26 the a.out object file format, as well as some systems that use
27 COFF or ELF where the stabs data is placed in a special section.
28 Avoid placing any object file format specific code in this file. */
31 #include "gdb_string.h"
33 #include "gdb_obstack.h"
36 #include "expression.h"
39 #include "aout/stab_gnu.h" /* We always use GNU stabs, not native */
41 #include "aout/aout64.h"
42 #include "gdb-stabs.h"
44 #include "complaints.h"
49 #include "cp-support.h"
53 /* Ask stabsread.h to define the vars it normally declares `extern'. */
56 #include "stabsread.h" /* Our own declarations */
59 extern void _initialize_stabsread (void);
61 /* The routines that read and process a complete stabs for a C struct or
62 C++ class pass lists of data member fields and lists of member function
63 fields in an instance of a field_info structure, as defined below.
64 This is part of some reorganization of low level C++ support and is
65 expected to eventually go away... (FIXME) */
71 struct nextfield
*next
;
73 /* This is the raw visibility from the stab. It is not checked
74 for being one of the visibilities we recognize, so code which
75 examines this field better be able to deal. */
81 struct next_fnfieldlist
83 struct next_fnfieldlist
*next
;
84 struct fn_fieldlist fn_fieldlist
;
90 read_one_struct_field (struct field_info
*, char **, char *,
91 struct type
*, struct objfile
*);
93 static struct type
*dbx_alloc_type (int[2], struct objfile
*);
95 static long read_huge_number (char **, int, int *, int);
97 static struct type
*error_type (char **, struct objfile
*);
100 patch_block_stabs (struct pending
*, struct pending_stabs
*,
103 static void fix_common_block (struct symbol
*, int);
105 static int read_type_number (char **, int *);
107 static struct type
*read_type (char **, struct objfile
*);
109 static struct type
*read_range_type (char **, int[2], int, struct objfile
*);
111 static struct type
*read_sun_builtin_type (char **, int[2], struct objfile
*);
113 static struct type
*read_sun_floating_type (char **, int[2],
116 static struct type
*read_enum_type (char **, struct type
*, struct objfile
*);
118 static struct type
*rs6000_builtin_type (int);
121 read_member_functions (struct field_info
*, char **, struct type
*,
125 read_struct_fields (struct field_info
*, char **, struct type
*,
129 read_baseclasses (struct field_info
*, char **, struct type
*,
133 read_tilde_fields (struct field_info
*, char **, struct type
*,
136 static int attach_fn_fields_to_type (struct field_info
*, struct type
*);
138 static int attach_fields_to_type (struct field_info
*, struct type
*,
141 static struct type
*read_struct_type (char **, struct type
*,
145 static struct type
*read_array_type (char **, struct type
*,
148 static struct field
*read_args (char **, int, struct objfile
*, int *, int *);
150 static void add_undefined_type (struct type
*, int[2]);
153 read_cpp_abbrev (struct field_info
*, char **, struct type
*,
156 static char *find_name_end (char *name
);
158 static int process_reference (char **string
);
160 void stabsread_clear_cache (void);
162 static const char vptr_name
[] = "_vptr$";
163 static const char vb_name
[] = "_vb$";
165 /* Define this as 1 if a pcc declaration of a char or short argument
166 gives the correct address. Otherwise assume pcc gives the
167 address of the corresponding int, which is not the same on a
168 big-endian machine. */
170 #if !defined (BELIEVE_PCC_PROMOTION)
171 #define BELIEVE_PCC_PROMOTION 0
175 invalid_cpp_abbrev_complaint (const char *arg1
)
177 complaint (&symfile_complaints
, _("invalid C++ abbreviation `%s'"), arg1
);
181 reg_value_complaint (int regnum
, int num_regs
, const char *sym
)
183 complaint (&symfile_complaints
,
184 _("register number %d too large (max %d) in symbol %s"),
185 regnum
, num_regs
- 1, sym
);
189 stabs_general_complaint (const char *arg1
)
191 complaint (&symfile_complaints
, "%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); \
223 /* Look up a dbx type-number pair. Return the address of the slot
224 where the type for that number-pair is stored.
225 The number-pair is in TYPENUMS.
227 This can be used for finding the type associated with that pair
228 or for associating a new type with the pair. */
230 static struct type
**
231 dbx_lookup_type (int typenums
[2])
233 int filenum
= typenums
[0];
234 int index
= typenums
[1];
237 struct header_file
*f
;
240 if (filenum
== -1) /* -1,-1 is for temporary types. */
243 if (filenum
< 0 || filenum
>= n_this_object_header_files
)
245 complaint (&symfile_complaints
,
246 _("Invalid symbol data: type number (%d,%d) out of range at symtab pos %d."),
247 filenum
, index
, symnum
);
255 /* Caller wants address of address of type. We think
256 that negative (rs6k builtin) types will never appear as
257 "lvalues", (nor should they), so we stuff the real type
258 pointer into a temp, and return its address. If referenced,
259 this will do the right thing. */
260 static struct type
*temp_type
;
262 temp_type
= rs6000_builtin_type (index
);
266 /* Type is defined outside of header files.
267 Find it in this object file's type vector. */
268 if (index
>= type_vector_length
)
270 old_len
= type_vector_length
;
273 type_vector_length
= INITIAL_TYPE_VECTOR_LENGTH
;
274 type_vector
= (struct type
**)
275 xmalloc (type_vector_length
* sizeof (struct type
*));
277 while (index
>= type_vector_length
)
279 type_vector_length
*= 2;
281 type_vector
= (struct type
**)
282 xrealloc ((char *) type_vector
,
283 (type_vector_length
* sizeof (struct type
*)));
284 memset (&type_vector
[old_len
], 0,
285 (type_vector_length
- old_len
) * sizeof (struct type
*));
287 return (&type_vector
[index
]);
291 real_filenum
= this_object_header_files
[filenum
];
293 if (real_filenum
>= N_HEADER_FILES (current_objfile
))
295 struct type
*temp_type
;
296 struct type
**temp_type_p
;
298 warning (_("GDB internal error: bad real_filenum"));
301 temp_type
= init_type (TYPE_CODE_ERROR
, 0, 0, NULL
, NULL
);
302 temp_type_p
= (struct type
**) xmalloc (sizeof (struct type
*));
303 *temp_type_p
= temp_type
;
307 f
= HEADER_FILES (current_objfile
) + real_filenum
;
309 f_orig_length
= f
->length
;
310 if (index
>= f_orig_length
)
312 while (index
>= f
->length
)
316 f
->vector
= (struct type
**)
317 xrealloc ((char *) f
->vector
, f
->length
* sizeof (struct type
*));
318 memset (&f
->vector
[f_orig_length
], 0,
319 (f
->length
- f_orig_length
) * sizeof (struct type
*));
321 return (&f
->vector
[index
]);
325 /* Make sure there is a type allocated for type numbers TYPENUMS
326 and return the type object.
327 This can create an empty (zeroed) type object.
328 TYPENUMS may be (-1, -1) to return a new type object that is not
329 put into the type vector, and so may not be referred to by number. */
332 dbx_alloc_type (int typenums
[2], struct objfile
*objfile
)
334 struct type
**type_addr
;
336 if (typenums
[0] == -1)
338 return (alloc_type (objfile
));
341 type_addr
= dbx_lookup_type (typenums
);
343 /* If we are referring to a type not known at all yet,
344 allocate an empty type for it.
345 We will fill it in later if we find out how. */
348 *type_addr
= alloc_type (objfile
);
354 /* for all the stabs in a given stab vector, build appropriate types
355 and fix their symbols in given symbol vector. */
358 patch_block_stabs (struct pending
*symbols
, struct pending_stabs
*stabs
,
359 struct objfile
*objfile
)
369 /* for all the stab entries, find their corresponding symbols and
370 patch their types! */
372 for (ii
= 0; ii
< stabs
->count
; ++ii
)
374 name
= stabs
->stab
[ii
];
375 pp
= (char *) strchr (name
, ':');
379 pp
= (char *) strchr (pp
, ':');
381 sym
= find_symbol_in_list (symbols
, name
, pp
- name
);
384 /* FIXME-maybe: it would be nice if we noticed whether
385 the variable was defined *anywhere*, not just whether
386 it is defined in this compilation unit. But neither
387 xlc or GCC seem to need such a definition, and until
388 we do psymtabs (so that the minimal symbols from all
389 compilation units are available now), I'm not sure
390 how to get the information. */
392 /* On xcoff, if a global is defined and never referenced,
393 ld will remove it from the executable. There is then
394 a N_GSYM stab for it, but no regular (C_EXT) symbol. */
395 sym
= (struct symbol
*)
396 obstack_alloc (&objfile
->objfile_obstack
,
397 sizeof (struct symbol
));
399 memset (sym
, 0, sizeof (struct symbol
));
400 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
401 SYMBOL_CLASS (sym
) = LOC_OPTIMIZED_OUT
;
402 DEPRECATED_SYMBOL_NAME (sym
) =
403 obsavestring (name
, pp
- name
, &objfile
->objfile_obstack
);
405 if (*(pp
- 1) == 'F' || *(pp
- 1) == 'f')
407 /* I don't think the linker does this with functions,
408 so as far as I know this is never executed.
409 But it doesn't hurt to check. */
411 lookup_function_type (read_type (&pp
, objfile
));
415 SYMBOL_TYPE (sym
) = read_type (&pp
, objfile
);
417 add_symbol_to_list (sym
, &global_symbols
);
422 if (*(pp
- 1) == 'F' || *(pp
- 1) == 'f')
425 lookup_function_type (read_type (&pp
, objfile
));
429 SYMBOL_TYPE (sym
) = read_type (&pp
, objfile
);
437 /* Read a number by which a type is referred to in dbx data,
438 or perhaps read a pair (FILENUM, TYPENUM) in parentheses.
439 Just a single number N is equivalent to (0,N).
440 Return the two numbers by storing them in the vector TYPENUMS.
441 TYPENUMS will then be used as an argument to dbx_lookup_type.
443 Returns 0 for success, -1 for error. */
446 read_type_number (char **pp
, int *typenums
)
452 typenums
[0] = read_huge_number (pp
, ',', &nbits
, 0);
455 typenums
[1] = read_huge_number (pp
, ')', &nbits
, 0);
462 typenums
[1] = read_huge_number (pp
, 0, &nbits
, 0);
470 #define VISIBILITY_PRIVATE '0' /* Stabs character for private field */
471 #define VISIBILITY_PROTECTED '1' /* Stabs character for protected fld */
472 #define VISIBILITY_PUBLIC '2' /* Stabs character for public field */
473 #define VISIBILITY_IGNORE '9' /* Optimized out or zero length */
475 /* Structure for storing pointers to reference definitions for fast lookup
476 during "process_later". */
485 #define MAX_CHUNK_REFS 100
486 #define REF_CHUNK_SIZE (MAX_CHUNK_REFS * sizeof (struct ref_map))
487 #define REF_MAP_SIZE(ref_chunk) ((ref_chunk) * REF_CHUNK_SIZE)
489 static struct ref_map
*ref_map
;
491 /* Ptr to free cell in chunk's linked list. */
492 static int ref_count
= 0;
494 /* Number of chunks malloced. */
495 static int ref_chunk
= 0;
497 /* This file maintains a cache of stabs aliases found in the symbol
498 table. If the symbol table changes, this cache must be cleared
499 or we are left holding onto data in invalid obstacks. */
501 stabsread_clear_cache (void)
507 /* Create array of pointers mapping refids to symbols and stab strings.
508 Add pointers to reference definition symbols and/or their values as we
509 find them, using their reference numbers as our index.
510 These will be used later when we resolve references. */
512 ref_add (int refnum
, struct symbol
*sym
, char *stabs
, CORE_ADDR value
)
516 if (refnum
>= ref_count
)
517 ref_count
= refnum
+ 1;
518 if (ref_count
> ref_chunk
* MAX_CHUNK_REFS
)
520 int new_slots
= ref_count
- ref_chunk
* MAX_CHUNK_REFS
;
521 int new_chunks
= new_slots
/ MAX_CHUNK_REFS
+ 1;
522 ref_map
= (struct ref_map
*)
523 xrealloc (ref_map
, REF_MAP_SIZE (ref_chunk
+ new_chunks
));
524 memset (ref_map
+ ref_chunk
* MAX_CHUNK_REFS
, 0, new_chunks
* REF_CHUNK_SIZE
);
525 ref_chunk
+= new_chunks
;
527 ref_map
[refnum
].stabs
= stabs
;
528 ref_map
[refnum
].sym
= sym
;
529 ref_map
[refnum
].value
= value
;
532 /* Return defined sym for the reference REFNUM. */
534 ref_search (int refnum
)
536 if (refnum
< 0 || refnum
> ref_count
)
538 return ref_map
[refnum
].sym
;
541 /* Parse a reference id in STRING and return the resulting
542 reference number. Move STRING beyond the reference id. */
545 process_reference (char **string
)
553 /* Advance beyond the initial '#'. */
556 /* Read number as reference id. */
557 while (*p
&& isdigit (*p
))
559 refnum
= refnum
* 10 + *p
- '0';
566 /* If STRING defines a reference, store away a pointer to the reference
567 definition for later use. Return the reference number. */
570 symbol_reference_defined (char **string
)
575 refnum
= process_reference (&p
);
577 /* Defining symbols end in '=' */
580 /* Symbol is being defined here. */
586 /* Must be a reference. Either the symbol has already been defined,
587 or this is a forward reference to it. */
594 define_symbol (CORE_ADDR valu
, char *string
, int desc
, int type
,
595 struct objfile
*objfile
)
598 char *p
= (char *) find_name_end (string
);
603 /* We would like to eliminate nameless symbols, but keep their types.
604 E.g. stab entry ":t10=*2" should produce a type 10, which is a pointer
605 to type 2, but, should not create a symbol to address that type. Since
606 the symbol will be nameless, there is no way any user can refer to it. */
610 /* Ignore syms with empty names. */
614 /* Ignore old-style symbols from cc -go */
624 /* If a nameless stab entry, all we need is the type, not the symbol.
625 e.g. ":t10=*2" or a nameless enum like " :T16=ered:0,green:1,blue:2,;" */
626 nameless
= (p
== string
|| ((string
[0] == ' ') && (string
[1] == ':')));
628 current_symbol
= sym
= (struct symbol
*)
629 obstack_alloc (&objfile
->objfile_obstack
, sizeof (struct symbol
));
630 memset (sym
, 0, sizeof (struct symbol
));
632 switch (type
& N_TYPE
)
635 SYMBOL_SECTION (sym
) = SECT_OFF_TEXT (objfile
);
638 SYMBOL_SECTION (sym
) = SECT_OFF_DATA (objfile
);
641 SYMBOL_SECTION (sym
) = SECT_OFF_BSS (objfile
);
645 if (processing_gcc_compilation
)
647 /* GCC 2.x puts the line number in desc. SunOS apparently puts in the
648 number of bytes occupied by a type or object, which we ignore. */
649 SYMBOL_LINE (sym
) = desc
;
653 SYMBOL_LINE (sym
) = 0; /* unknown */
656 if (is_cplus_marker (string
[0]))
658 /* Special GNU C++ names. */
662 DEPRECATED_SYMBOL_NAME (sym
) = obsavestring ("this", strlen ("this"),
663 &objfile
->objfile_obstack
);
666 case 'v': /* $vtbl_ptr_type */
667 /* Was: DEPRECATED_SYMBOL_NAME (sym) = "vptr"; */
671 DEPRECATED_SYMBOL_NAME (sym
) = obsavestring ("eh_throw", strlen ("eh_throw"),
672 &objfile
->objfile_obstack
);
676 /* This was an anonymous type that was never fixed up. */
679 #ifdef STATIC_TRANSFORM_NAME
681 /* SunPRO (3.0 at least) static variable encoding. */
686 complaint (&symfile_complaints
, _("Unknown C++ symbol name `%s'"),
688 goto normal
; /* Do *something* with it */
694 SYMBOL_LANGUAGE (sym
) = current_subfile
->language
;
695 SYMBOL_SET_NAMES (sym
, string
, p
- string
, objfile
);
699 /* Determine the type of name being defined. */
701 /* Getting GDB to correctly skip the symbol on an undefined symbol
702 descriptor and not ever dump core is a very dodgy proposition if
703 we do things this way. I say the acorn RISC machine can just
704 fix their compiler. */
705 /* The Acorn RISC machine's compiler can put out locals that don't
706 start with "234=" or "(3,4)=", so assume anything other than the
707 deftypes we know how to handle is a local. */
708 if (!strchr ("cfFGpPrStTvVXCR", *p
))
710 if (isdigit (*p
) || *p
== '(' || *p
== '-')
719 /* c is a special case, not followed by a type-number.
720 SYMBOL:c=iVALUE for an integer constant symbol.
721 SYMBOL:c=rVALUE for a floating constant symbol.
722 SYMBOL:c=eTYPE,INTVALUE for an enum constant symbol.
723 e.g. "b:c=e6,0" for "const b = blob1"
724 (where type 6 is defined by "blobs:t6=eblob1:0,blob2:1,;"). */
727 SYMBOL_CLASS (sym
) = LOC_CONST
;
728 SYMBOL_TYPE (sym
) = error_type (&p
, objfile
);
729 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
730 add_symbol_to_list (sym
, &file_symbols
);
741 /* FIXME-if-picky-about-floating-accuracy: Should be using
742 target arithmetic to get the value. real.c in GCC
743 probably has the necessary code. */
745 /* FIXME: lookup_fundamental_type is a hack. We should be
746 creating a type especially for the type of float constants.
747 Problem is, what type should it be?
749 Also, what should the name of this type be? Should we
750 be using 'S' constants (see stabs.texinfo) instead? */
752 SYMBOL_TYPE (sym
) = lookup_fundamental_type (objfile
,
755 obstack_alloc (&objfile
->objfile_obstack
,
756 TYPE_LENGTH (SYMBOL_TYPE (sym
)));
757 store_typed_floating (dbl_valu
, SYMBOL_TYPE (sym
), d
);
758 SYMBOL_VALUE_BYTES (sym
) = dbl_valu
;
759 SYMBOL_CLASS (sym
) = LOC_CONST_BYTES
;
764 /* Defining integer constants this way is kind of silly,
765 since 'e' constants allows the compiler to give not
766 only the value, but the type as well. C has at least
767 int, long, unsigned int, and long long as constant
768 types; other languages probably should have at least
769 unsigned as well as signed constants. */
771 /* We just need one int constant type for all objfiles.
772 It doesn't depend on languages or anything (arguably its
773 name should be a language-specific name for a type of
774 that size, but I'm inclined to say that if the compiler
775 wants a nice name for the type, it can use 'e'). */
776 static struct type
*int_const_type
;
778 /* Yes, this is as long as a *host* int. That is because we
780 if (int_const_type
== NULL
)
782 init_type (TYPE_CODE_INT
,
783 sizeof (int) * HOST_CHAR_BIT
/ TARGET_CHAR_BIT
, 0,
785 (struct objfile
*) NULL
);
786 SYMBOL_TYPE (sym
) = int_const_type
;
787 SYMBOL_VALUE (sym
) = atoi (p
);
788 SYMBOL_CLASS (sym
) = LOC_CONST
;
792 /* SYMBOL:c=eTYPE,INTVALUE for a constant symbol whose value
793 can be represented as integral.
794 e.g. "b:c=e6,0" for "const b = blob1"
795 (where type 6 is defined by "blobs:t6=eblob1:0,blob2:1,;"). */
797 SYMBOL_CLASS (sym
) = LOC_CONST
;
798 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
802 SYMBOL_TYPE (sym
) = error_type (&p
, objfile
);
807 /* If the value is too big to fit in an int (perhaps because
808 it is unsigned), or something like that, we silently get
809 a bogus value. The type and everything else about it is
810 correct. Ideally, we should be using whatever we have
811 available for parsing unsigned and long long values,
813 SYMBOL_VALUE (sym
) = atoi (p
);
818 SYMBOL_CLASS (sym
) = LOC_CONST
;
819 SYMBOL_TYPE (sym
) = error_type (&p
, objfile
);
822 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
823 add_symbol_to_list (sym
, &file_symbols
);
827 /* The name of a caught exception. */
828 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
829 SYMBOL_CLASS (sym
) = LOC_LABEL
;
830 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
831 SYMBOL_VALUE_ADDRESS (sym
) = valu
;
832 add_symbol_to_list (sym
, &local_symbols
);
836 /* A static function definition. */
837 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
838 SYMBOL_CLASS (sym
) = LOC_BLOCK
;
839 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
840 add_symbol_to_list (sym
, &file_symbols
);
841 /* fall into process_function_types. */
843 process_function_types
:
844 /* Function result types are described as the result type in stabs.
845 We need to convert this to the function-returning-type-X type
846 in GDB. E.g. "int" is converted to "function returning int". */
847 if (TYPE_CODE (SYMBOL_TYPE (sym
)) != TYPE_CODE_FUNC
)
848 SYMBOL_TYPE (sym
) = lookup_function_type (SYMBOL_TYPE (sym
));
850 /* All functions in C++ have prototypes. Stabs does not offer an
851 explicit way to identify prototyped or unprototyped functions,
852 but both GCC and Sun CC emit stabs for the "call-as" type rather
853 than the "declared-as" type for unprototyped functions, so
854 we treat all functions as if they were prototyped. This is used
855 primarily for promotion when calling the function from GDB. */
856 TYPE_FLAGS (SYMBOL_TYPE (sym
)) |= TYPE_FLAG_PROTOTYPED
;
858 /* fall into process_prototype_types */
860 process_prototype_types
:
861 /* Sun acc puts declared types of arguments here. */
864 struct type
*ftype
= SYMBOL_TYPE (sym
);
869 /* Obtain a worst case guess for the number of arguments
870 by counting the semicolons. */
877 /* Allocate parameter information fields and fill them in. */
878 TYPE_FIELDS (ftype
) = (struct field
*)
879 TYPE_ALLOC (ftype
, nsemi
* sizeof (struct field
));
884 /* A type number of zero indicates the start of varargs.
885 FIXME: GDB currently ignores vararg functions. */
886 if (p
[0] == '0' && p
[1] == '\0')
888 ptype
= read_type (&p
, objfile
);
890 /* The Sun compilers mark integer arguments, which should
891 be promoted to the width of the calling conventions, with
892 a type which references itself. This type is turned into
893 a TYPE_CODE_VOID type by read_type, and we have to turn
894 it back into builtin_type_int here.
895 FIXME: Do we need a new builtin_type_promoted_int_arg ? */
896 if (TYPE_CODE (ptype
) == TYPE_CODE_VOID
)
897 ptype
= builtin_type_int
;
898 TYPE_FIELD_TYPE (ftype
, nparams
) = ptype
;
899 TYPE_FIELD_ARTIFICIAL (ftype
, nparams
++) = 0;
901 TYPE_NFIELDS (ftype
) = nparams
;
902 TYPE_FLAGS (ftype
) |= TYPE_FLAG_PROTOTYPED
;
907 /* A global function definition. */
908 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
909 SYMBOL_CLASS (sym
) = LOC_BLOCK
;
910 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
911 add_symbol_to_list (sym
, &global_symbols
);
912 goto process_function_types
;
915 /* For a class G (global) symbol, it appears that the
916 value is not correct. It is necessary to search for the
917 corresponding linker definition to find the value.
918 These definitions appear at the end of the namelist. */
919 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
920 SYMBOL_CLASS (sym
) = LOC_STATIC
;
921 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
922 /* Don't add symbol references to global_sym_chain.
923 Symbol references don't have valid names and wont't match up with
924 minimal symbols when the global_sym_chain is relocated.
925 We'll fixup symbol references when we fixup the defining symbol. */
926 if (DEPRECATED_SYMBOL_NAME (sym
) && DEPRECATED_SYMBOL_NAME (sym
)[0] != '#')
928 i
= hashname (DEPRECATED_SYMBOL_NAME (sym
));
929 SYMBOL_VALUE_CHAIN (sym
) = global_sym_chain
[i
];
930 global_sym_chain
[i
] = sym
;
932 add_symbol_to_list (sym
, &global_symbols
);
935 /* This case is faked by a conditional above,
936 when there is no code letter in the dbx data.
937 Dbx data never actually contains 'l'. */
940 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
941 SYMBOL_CLASS (sym
) = LOC_LOCAL
;
942 SYMBOL_VALUE (sym
) = valu
;
943 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
944 add_symbol_to_list (sym
, &local_symbols
);
949 /* pF is a two-letter code that means a function parameter in Fortran.
950 The type-number specifies the type of the return value.
951 Translate it into a pointer-to-function type. */
955 = lookup_pointer_type
956 (lookup_function_type (read_type (&p
, objfile
)));
959 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
961 SYMBOL_CLASS (sym
) = LOC_ARG
;
962 SYMBOL_VALUE (sym
) = valu
;
963 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
964 add_symbol_to_list (sym
, &local_symbols
);
966 if (gdbarch_byte_order (current_gdbarch
) != BFD_ENDIAN_BIG
)
968 /* On little-endian machines, this crud is never necessary,
969 and, if the extra bytes contain garbage, is harmful. */
973 /* If it's gcc-compiled, if it says `short', believe it. */
974 if (processing_gcc_compilation
|| BELIEVE_PCC_PROMOTION
)
977 if (!BELIEVE_PCC_PROMOTION
)
979 /* This is the signed type which arguments get promoted to. */
980 static struct type
*pcc_promotion_type
;
981 /* This is the unsigned type which arguments get promoted to. */
982 static struct type
*pcc_unsigned_promotion_type
;
984 /* Call it "int" because this is mainly C lossage. */
985 if (pcc_promotion_type
== NULL
)
987 init_type (TYPE_CODE_INT
,
988 gdbarch_int_bit (current_gdbarch
) / TARGET_CHAR_BIT
,
991 if (pcc_unsigned_promotion_type
== NULL
)
992 pcc_unsigned_promotion_type
=
993 init_type (TYPE_CODE_INT
,
994 gdbarch_int_bit (current_gdbarch
) / TARGET_CHAR_BIT
,
995 TYPE_FLAG_UNSIGNED
, "unsigned int", NULL
);
997 /* If PCC says a parameter is a short or a char, it is
999 if (TYPE_LENGTH (SYMBOL_TYPE (sym
)) < TYPE_LENGTH (pcc_promotion_type
)
1000 && TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_INT
)
1003 TYPE_UNSIGNED (SYMBOL_TYPE (sym
))
1004 ? pcc_unsigned_promotion_type
1005 : pcc_promotion_type
;
1011 /* acc seems to use P to declare the prototypes of functions that
1012 are referenced by this file. gdb is not prepared to deal
1013 with this extra information. FIXME, it ought to. */
1016 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
1017 goto process_prototype_types
;
1022 /* Parameter which is in a register. */
1023 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
1024 SYMBOL_CLASS (sym
) = LOC_REGPARM
;
1025 SYMBOL_VALUE (sym
) = STAB_REG_TO_REGNUM (valu
);
1026 if (SYMBOL_VALUE (sym
) >= gdbarch_num_regs (current_gdbarch
)
1027 + gdbarch_num_pseudo_regs (current_gdbarch
))
1029 reg_value_complaint (SYMBOL_VALUE (sym
),
1030 gdbarch_num_regs (current_gdbarch
)
1031 + gdbarch_num_pseudo_regs (current_gdbarch
),
1032 SYMBOL_PRINT_NAME (sym
));
1033 SYMBOL_VALUE (sym
) = SP_REGNUM
; /* Known safe, though useless */
1035 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1036 add_symbol_to_list (sym
, &local_symbols
);
1040 /* Register variable (either global or local). */
1041 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
1042 SYMBOL_CLASS (sym
) = LOC_REGISTER
;
1043 SYMBOL_VALUE (sym
) = STAB_REG_TO_REGNUM (valu
);
1044 if (SYMBOL_VALUE (sym
) >= gdbarch_num_regs (current_gdbarch
)
1045 + gdbarch_num_pseudo_regs (current_gdbarch
))
1047 reg_value_complaint (SYMBOL_VALUE (sym
),
1048 gdbarch_num_regs (current_gdbarch
)
1049 + gdbarch_num_pseudo_regs (current_gdbarch
),
1050 SYMBOL_PRINT_NAME (sym
));
1051 SYMBOL_VALUE (sym
) = SP_REGNUM
; /* Known safe, though useless */
1053 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1054 if (within_function
)
1056 /* Sun cc uses a pair of symbols, one 'p' and one 'r', with
1057 the same name to represent an argument passed in a
1058 register. GCC uses 'P' for the same case. So if we find
1059 such a symbol pair we combine it into one 'P' symbol.
1060 For Sun cc we need to do this regardless of
1061 stabs_argument_has_addr, because the compiler puts out
1062 the 'p' symbol even if it never saves the argument onto
1065 On most machines, we want to preserve both symbols, so
1066 that we can still get information about what is going on
1067 with the stack (VAX for computing args_printed, using
1068 stack slots instead of saved registers in backtraces,
1071 Note that this code illegally combines
1072 main(argc) struct foo argc; { register struct foo argc; }
1073 but this case is considered pathological and causes a warning
1074 from a decent compiler. */
1077 && local_symbols
->nsyms
> 0
1078 && gdbarch_stabs_argument_has_addr (current_gdbarch
,
1081 struct symbol
*prev_sym
;
1082 prev_sym
= local_symbols
->symbol
[local_symbols
->nsyms
- 1];
1083 if ((SYMBOL_CLASS (prev_sym
) == LOC_REF_ARG
1084 || SYMBOL_CLASS (prev_sym
) == LOC_ARG
)
1085 && strcmp (DEPRECATED_SYMBOL_NAME (prev_sym
),
1086 DEPRECATED_SYMBOL_NAME (sym
)) == 0)
1088 SYMBOL_CLASS (prev_sym
) = LOC_REGPARM
;
1089 /* Use the type from the LOC_REGISTER; that is the type
1090 that is actually in that register. */
1091 SYMBOL_TYPE (prev_sym
) = SYMBOL_TYPE (sym
);
1092 SYMBOL_VALUE (prev_sym
) = SYMBOL_VALUE (sym
);
1097 add_symbol_to_list (sym
, &local_symbols
);
1100 add_symbol_to_list (sym
, &file_symbols
);
1104 /* Static symbol at top level of file */
1105 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
1106 SYMBOL_CLASS (sym
) = LOC_STATIC
;
1107 SYMBOL_VALUE_ADDRESS (sym
) = valu
;
1108 #ifdef STATIC_TRANSFORM_NAME
1109 if (IS_STATIC_TRANSFORM_NAME (DEPRECATED_SYMBOL_NAME (sym
)))
1111 struct minimal_symbol
*msym
;
1112 msym
= lookup_minimal_symbol (DEPRECATED_SYMBOL_NAME (sym
), NULL
, objfile
);
1115 DEPRECATED_SYMBOL_NAME (sym
) = STATIC_TRANSFORM_NAME (DEPRECATED_SYMBOL_NAME (sym
));
1116 SYMBOL_VALUE_ADDRESS (sym
) = SYMBOL_VALUE_ADDRESS (msym
);
1120 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1121 add_symbol_to_list (sym
, &file_symbols
);
1125 /* In Ada, there is no distinction between typedef and non-typedef;
1126 any type declaration implicitly has the equivalent of a typedef,
1127 and thus 't' is in fact equivalent to 'Tt'.
1129 Therefore, for Ada units, we check the character immediately
1130 before the 't', and if we do not find a 'T', then make sure to
1131 create the associated symbol in the STRUCT_DOMAIN ('t' definitions
1132 will be stored in the VAR_DOMAIN). If the symbol was indeed
1133 defined as 'Tt' then the STRUCT_DOMAIN symbol will be created
1134 elsewhere, so we don't need to take care of that.
1136 This is important to do, because of forward references:
1137 The cleanup of undefined types stored in undef_types only uses
1138 STRUCT_DOMAIN symbols to perform the replacement. */
1139 synonym
= (SYMBOL_LANGUAGE (sym
) == language_ada
&& p
[-2] != 'T');
1142 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
1144 /* For a nameless type, we don't want a create a symbol, thus we
1145 did not use `sym'. Return without further processing. */
1149 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
1150 SYMBOL_VALUE (sym
) = valu
;
1151 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1152 /* C++ vagaries: we may have a type which is derived from
1153 a base type which did not have its name defined when the
1154 derived class was output. We fill in the derived class's
1155 base part member's name here in that case. */
1156 if (TYPE_NAME (SYMBOL_TYPE (sym
)) != NULL
)
1157 if ((TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_STRUCT
1158 || TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_UNION
)
1159 && TYPE_N_BASECLASSES (SYMBOL_TYPE (sym
)))
1162 for (j
= TYPE_N_BASECLASSES (SYMBOL_TYPE (sym
)) - 1; j
>= 0; j
--)
1163 if (TYPE_BASECLASS_NAME (SYMBOL_TYPE (sym
), j
) == 0)
1164 TYPE_BASECLASS_NAME (SYMBOL_TYPE (sym
), j
) =
1165 type_name_no_tag (TYPE_BASECLASS (SYMBOL_TYPE (sym
), j
));
1168 if (TYPE_NAME (SYMBOL_TYPE (sym
)) == NULL
)
1170 /* gcc-2.6 or later (when using -fvtable-thunks)
1171 emits a unique named type for a vtable entry.
1172 Some gdb code depends on that specific name. */
1173 extern const char vtbl_ptr_name
[];
1175 if ((TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_PTR
1176 && strcmp (DEPRECATED_SYMBOL_NAME (sym
), vtbl_ptr_name
))
1177 || TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_FUNC
)
1179 /* If we are giving a name to a type such as "pointer to
1180 foo" or "function returning foo", we better not set
1181 the TYPE_NAME. If the program contains "typedef char
1182 *caddr_t;", we don't want all variables of type char
1183 * to print as caddr_t. This is not just a
1184 consequence of GDB's type management; PCC and GCC (at
1185 least through version 2.4) both output variables of
1186 either type char * or caddr_t with the type number
1187 defined in the 't' symbol for caddr_t. If a future
1188 compiler cleans this up it GDB is not ready for it
1189 yet, but if it becomes ready we somehow need to
1190 disable this check (without breaking the PCC/GCC2.4
1195 Fortunately, this check seems not to be necessary
1196 for anything except pointers or functions. */
1197 /* ezannoni: 2000-10-26. This seems to apply for
1198 versions of gcc older than 2.8. This was the original
1199 problem: with the following code gdb would tell that
1200 the type for name1 is caddr_t, and func is char()
1201 typedef char *caddr_t;
1213 /* Pascal accepts names for pointer types. */
1214 if (current_subfile
->language
== language_pascal
)
1216 TYPE_NAME (SYMBOL_TYPE (sym
)) = DEPRECATED_SYMBOL_NAME (sym
);
1220 TYPE_NAME (SYMBOL_TYPE (sym
)) = DEPRECATED_SYMBOL_NAME (sym
);
1223 add_symbol_to_list (sym
, &file_symbols
);
1227 /* Create the STRUCT_DOMAIN clone. */
1228 struct symbol
*struct_sym
= (struct symbol
*)
1229 obstack_alloc (&objfile
->objfile_obstack
, sizeof (struct symbol
));
1232 SYMBOL_CLASS (struct_sym
) = LOC_TYPEDEF
;
1233 SYMBOL_VALUE (struct_sym
) = valu
;
1234 SYMBOL_DOMAIN (struct_sym
) = STRUCT_DOMAIN
;
1235 if (TYPE_NAME (SYMBOL_TYPE (sym
)) == 0)
1236 TYPE_NAME (SYMBOL_TYPE (sym
))
1237 = obconcat (&objfile
->objfile_obstack
, "", "",
1238 DEPRECATED_SYMBOL_NAME (sym
));
1239 add_symbol_to_list (struct_sym
, &file_symbols
);
1245 /* Struct, union, or enum tag. For GNU C++, this can be be followed
1246 by 't' which means we are typedef'ing it as well. */
1247 synonym
= *p
== 't';
1252 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
1254 /* For a nameless type, we don't want a create a symbol, thus we
1255 did not use `sym'. Return without further processing. */
1259 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
1260 SYMBOL_VALUE (sym
) = valu
;
1261 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
1262 if (TYPE_TAG_NAME (SYMBOL_TYPE (sym
)) == 0)
1263 TYPE_TAG_NAME (SYMBOL_TYPE (sym
))
1264 = obconcat (&objfile
->objfile_obstack
, "", "", DEPRECATED_SYMBOL_NAME (sym
));
1265 add_symbol_to_list (sym
, &file_symbols
);
1269 /* Clone the sym and then modify it. */
1270 struct symbol
*typedef_sym
= (struct symbol
*)
1271 obstack_alloc (&objfile
->objfile_obstack
, sizeof (struct symbol
));
1272 *typedef_sym
= *sym
;
1273 SYMBOL_CLASS (typedef_sym
) = LOC_TYPEDEF
;
1274 SYMBOL_VALUE (typedef_sym
) = valu
;
1275 SYMBOL_DOMAIN (typedef_sym
) = VAR_DOMAIN
;
1276 if (TYPE_NAME (SYMBOL_TYPE (sym
)) == 0)
1277 TYPE_NAME (SYMBOL_TYPE (sym
))
1278 = obconcat (&objfile
->objfile_obstack
, "", "", DEPRECATED_SYMBOL_NAME (sym
));
1279 add_symbol_to_list (typedef_sym
, &file_symbols
);
1284 /* Static symbol of local scope */
1285 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
1286 SYMBOL_CLASS (sym
) = LOC_STATIC
;
1287 SYMBOL_VALUE_ADDRESS (sym
) = valu
;
1288 #ifdef STATIC_TRANSFORM_NAME
1289 if (IS_STATIC_TRANSFORM_NAME (DEPRECATED_SYMBOL_NAME (sym
)))
1291 struct minimal_symbol
*msym
;
1292 msym
= lookup_minimal_symbol (DEPRECATED_SYMBOL_NAME (sym
), NULL
, objfile
);
1295 DEPRECATED_SYMBOL_NAME (sym
) = STATIC_TRANSFORM_NAME (DEPRECATED_SYMBOL_NAME (sym
));
1296 SYMBOL_VALUE_ADDRESS (sym
) = SYMBOL_VALUE_ADDRESS (msym
);
1300 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1301 add_symbol_to_list (sym
, &local_symbols
);
1305 /* Reference parameter */
1306 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
1307 SYMBOL_CLASS (sym
) = LOC_REF_ARG
;
1308 SYMBOL_VALUE (sym
) = valu
;
1309 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1310 add_symbol_to_list (sym
, &local_symbols
);
1314 /* Reference parameter which is in a register. */
1315 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
1316 SYMBOL_CLASS (sym
) = LOC_REGPARM_ADDR
;
1317 SYMBOL_VALUE (sym
) = STAB_REG_TO_REGNUM (valu
);
1318 if (SYMBOL_VALUE (sym
) >= gdbarch_num_regs (current_gdbarch
)
1319 + gdbarch_num_pseudo_regs (current_gdbarch
))
1321 reg_value_complaint (SYMBOL_VALUE (sym
),
1322 gdbarch_num_regs (current_gdbarch
)
1323 + gdbarch_num_pseudo_regs (current_gdbarch
),
1324 SYMBOL_PRINT_NAME (sym
));
1325 SYMBOL_VALUE (sym
) = SP_REGNUM
; /* Known safe, though useless */
1327 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1328 add_symbol_to_list (sym
, &local_symbols
);
1332 /* This is used by Sun FORTRAN for "function result value".
1333 Sun claims ("dbx and dbxtool interfaces", 2nd ed)
1334 that Pascal uses it too, but when I tried it Pascal used
1335 "x:3" (local symbol) instead. */
1336 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
1337 SYMBOL_CLASS (sym
) = LOC_LOCAL
;
1338 SYMBOL_VALUE (sym
) = valu
;
1339 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1340 add_symbol_to_list (sym
, &local_symbols
);
1344 SYMBOL_TYPE (sym
) = error_type (&p
, objfile
);
1345 SYMBOL_CLASS (sym
) = LOC_CONST
;
1346 SYMBOL_VALUE (sym
) = 0;
1347 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1348 add_symbol_to_list (sym
, &file_symbols
);
1352 /* Some systems pass variables of certain types by reference instead
1353 of by value, i.e. they will pass the address of a structure (in a
1354 register or on the stack) instead of the structure itself. */
1356 if (gdbarch_stabs_argument_has_addr (current_gdbarch
, SYMBOL_TYPE (sym
))
1357 && (SYMBOL_CLASS (sym
) == LOC_REGPARM
|| SYMBOL_CLASS (sym
) == LOC_ARG
))
1359 /* We have to convert LOC_REGPARM to LOC_REGPARM_ADDR (for
1360 variables passed in a register). */
1361 if (SYMBOL_CLASS (sym
) == LOC_REGPARM
)
1362 SYMBOL_CLASS (sym
) = LOC_REGPARM_ADDR
;
1363 /* Likewise for converting LOC_ARG to LOC_REF_ARG (for the 7th
1364 and subsequent arguments on SPARC, for example). */
1365 else if (SYMBOL_CLASS (sym
) == LOC_ARG
)
1366 SYMBOL_CLASS (sym
) = LOC_REF_ARG
;
1372 /* Skip rest of this symbol and return an error type.
1374 General notes on error recovery: error_type always skips to the
1375 end of the symbol (modulo cretinous dbx symbol name continuation).
1376 Thus code like this:
1378 if (*(*pp)++ != ';')
1379 return error_type (pp, objfile);
1381 is wrong because if *pp starts out pointing at '\0' (typically as the
1382 result of an earlier error), it will be incremented to point to the
1383 start of the next symbol, which might produce strange results, at least
1384 if you run off the end of the string table. Instead use
1387 return error_type (pp, objfile);
1393 foo = error_type (pp, objfile);
1397 And in case it isn't obvious, the point of all this hair is so the compiler
1398 can define new types and new syntaxes, and old versions of the
1399 debugger will be able to read the new symbol tables. */
1401 static struct type
*
1402 error_type (char **pp
, struct objfile
*objfile
)
1404 complaint (&symfile_complaints
, _("couldn't parse type; debugger out of date?"));
1407 /* Skip to end of symbol. */
1408 while (**pp
!= '\0')
1413 /* Check for and handle cretinous dbx symbol name continuation! */
1414 if ((*pp
)[-1] == '\\' || (*pp
)[-1] == '?')
1416 *pp
= next_symbol_text (objfile
);
1423 return (builtin_type_error
);
1427 /* Read type information or a type definition; return the type. Even
1428 though this routine accepts either type information or a type
1429 definition, the distinction is relevant--some parts of stabsread.c
1430 assume that type information starts with a digit, '-', or '(' in
1431 deciding whether to call read_type. */
1433 static struct type
*
1434 read_type (char **pp
, struct objfile
*objfile
)
1436 struct type
*type
= 0;
1439 char type_descriptor
;
1441 /* Size in bits of type if specified by a type attribute, or -1 if
1442 there is no size attribute. */
1445 /* Used to distinguish string and bitstring from char-array and set. */
1448 /* Used to distinguish vector from array. */
1451 /* Read type number if present. The type number may be omitted.
1452 for instance in a two-dimensional array declared with type
1453 "ar1;1;10;ar1;1;10;4". */
1454 if ((**pp
>= '0' && **pp
<= '9')
1458 if (read_type_number (pp
, typenums
) != 0)
1459 return error_type (pp
, objfile
);
1463 /* Type is not being defined here. Either it already
1464 exists, or this is a forward reference to it.
1465 dbx_alloc_type handles both cases. */
1466 type
= dbx_alloc_type (typenums
, objfile
);
1468 /* If this is a forward reference, arrange to complain if it
1469 doesn't get patched up by the time we're done
1471 if (TYPE_CODE (type
) == TYPE_CODE_UNDEF
)
1472 add_undefined_type (type
, typenums
);
1477 /* Type is being defined here. */
1479 Also skip the type descriptor - we get it below with (*pp)[-1]. */
1484 /* 'typenums=' not present, type is anonymous. Read and return
1485 the definition, but don't put it in the type vector. */
1486 typenums
[0] = typenums
[1] = -1;
1491 type_descriptor
= (*pp
)[-1];
1492 switch (type_descriptor
)
1496 enum type_code code
;
1498 /* Used to index through file_symbols. */
1499 struct pending
*ppt
;
1502 /* Name including "struct", etc. */
1506 char *from
, *to
, *p
, *q1
, *q2
;
1508 /* Set the type code according to the following letter. */
1512 code
= TYPE_CODE_STRUCT
;
1515 code
= TYPE_CODE_UNION
;
1518 code
= TYPE_CODE_ENUM
;
1522 /* Complain and keep going, so compilers can invent new
1523 cross-reference types. */
1524 complaint (&symfile_complaints
,
1525 _("Unrecognized cross-reference type `%c'"), (*pp
)[0]);
1526 code
= TYPE_CODE_STRUCT
;
1531 q1
= strchr (*pp
, '<');
1532 p
= strchr (*pp
, ':');
1534 return error_type (pp
, objfile
);
1535 if (q1
&& p
> q1
&& p
[1] == ':')
1537 int nesting_level
= 0;
1538 for (q2
= q1
; *q2
; q2
++)
1542 else if (*q2
== '>')
1544 else if (*q2
== ':' && nesting_level
== 0)
1549 return error_type (pp
, objfile
);
1552 (char *) obstack_alloc (&objfile
->objfile_obstack
, p
- *pp
+ 1);
1554 /* Copy the name. */
1560 /* Set the pointer ahead of the name which we just read, and
1565 /* If this type has already been declared, then reuse the same
1566 type, rather than allocating a new one. This saves some
1569 for (ppt
= file_symbols
; ppt
; ppt
= ppt
->next
)
1570 for (i
= 0; i
< ppt
->nsyms
; i
++)
1572 struct symbol
*sym
= ppt
->symbol
[i
];
1574 if (SYMBOL_CLASS (sym
) == LOC_TYPEDEF
1575 && SYMBOL_DOMAIN (sym
) == STRUCT_DOMAIN
1576 && (TYPE_CODE (SYMBOL_TYPE (sym
)) == code
)
1577 && strcmp (DEPRECATED_SYMBOL_NAME (sym
), type_name
) == 0)
1579 obstack_free (&objfile
->objfile_obstack
, type_name
);
1580 type
= SYMBOL_TYPE (sym
);
1581 if (typenums
[0] != -1)
1582 *dbx_lookup_type (typenums
) = type
;
1587 /* Didn't find the type to which this refers, so we must
1588 be dealing with a forward reference. Allocate a type
1589 structure for it, and keep track of it so we can
1590 fill in the rest of the fields when we get the full
1592 type
= dbx_alloc_type (typenums
, objfile
);
1593 TYPE_CODE (type
) = code
;
1594 TYPE_TAG_NAME (type
) = type_name
;
1595 INIT_CPLUS_SPECIFIC (type
);
1596 TYPE_FLAGS (type
) |= TYPE_FLAG_STUB
;
1598 add_undefined_type (type
, typenums
);
1602 case '-': /* RS/6000 built-in type */
1616 /* We deal with something like t(1,2)=(3,4)=... which
1617 the Lucid compiler and recent gcc versions (post 2.7.3) use. */
1619 /* Allocate and enter the typedef type first.
1620 This handles recursive types. */
1621 type
= dbx_alloc_type (typenums
, objfile
);
1622 TYPE_CODE (type
) = TYPE_CODE_TYPEDEF
;
1624 struct type
*xtype
= read_type (pp
, objfile
);
1627 /* It's being defined as itself. That means it is "void". */
1628 TYPE_CODE (type
) = TYPE_CODE_VOID
;
1629 TYPE_LENGTH (type
) = 1;
1631 else if (type_size
>= 0 || is_string
)
1633 /* This is the absolute wrong way to construct types. Every
1634 other debug format has found a way around this problem and
1635 the related problems with unnecessarily stubbed types;
1636 someone motivated should attempt to clean up the issue
1637 here as well. Once a type pointed to has been created it
1638 should not be modified.
1640 Well, it's not *absolutely* wrong. Constructing recursive
1641 types (trees, linked lists) necessarily entails modifying
1642 types after creating them. Constructing any loop structure
1643 entails side effects. The Dwarf 2 reader does handle this
1644 more gracefully (it never constructs more than once
1645 instance of a type object, so it doesn't have to copy type
1646 objects wholesale), but it still mutates type objects after
1647 other folks have references to them.
1649 Keep in mind that this circularity/mutation issue shows up
1650 at the source language level, too: C's "incomplete types",
1651 for example. So the proper cleanup, I think, would be to
1652 limit GDB's type smashing to match exactly those required
1653 by the source language. So GDB could have a
1654 "complete_this_type" function, but never create unnecessary
1655 copies of a type otherwise. */
1656 replace_type (type
, xtype
);
1657 TYPE_NAME (type
) = NULL
;
1658 TYPE_TAG_NAME (type
) = NULL
;
1662 TYPE_FLAGS (type
) |= TYPE_FLAG_TARGET_STUB
;
1663 TYPE_TARGET_TYPE (type
) = xtype
;
1668 /* In the following types, we must be sure to overwrite any existing
1669 type that the typenums refer to, rather than allocating a new one
1670 and making the typenums point to the new one. This is because there
1671 may already be pointers to the existing type (if it had been
1672 forward-referenced), and we must change it to a pointer, function,
1673 reference, or whatever, *in-place*. */
1675 case '*': /* Pointer to another type */
1676 type1
= read_type (pp
, objfile
);
1677 type
= make_pointer_type (type1
, dbx_lookup_type (typenums
));
1680 case '&': /* Reference to another type */
1681 type1
= read_type (pp
, objfile
);
1682 type
= make_reference_type (type1
, dbx_lookup_type (typenums
));
1685 case 'f': /* Function returning another type */
1686 type1
= read_type (pp
, objfile
);
1687 type
= make_function_type (type1
, dbx_lookup_type (typenums
));
1690 case 'g': /* Prototyped function. (Sun) */
1692 /* Unresolved questions:
1694 - According to Sun's ``STABS Interface Manual'', for 'f'
1695 and 'F' symbol descriptors, a `0' in the argument type list
1696 indicates a varargs function. But it doesn't say how 'g'
1697 type descriptors represent that info. Someone with access
1698 to Sun's toolchain should try it out.
1700 - According to the comment in define_symbol (search for
1701 `process_prototype_types:'), Sun emits integer arguments as
1702 types which ref themselves --- like `void' types. Do we
1703 have to deal with that here, too? Again, someone with
1704 access to Sun's toolchain should try it out and let us
1707 const char *type_start
= (*pp
) - 1;
1708 struct type
*return_type
= read_type (pp
, objfile
);
1709 struct type
*func_type
1710 = make_function_type (return_type
, dbx_lookup_type (typenums
));
1713 struct type_list
*next
;
1717 while (**pp
&& **pp
!= '#')
1719 struct type
*arg_type
= read_type (pp
, objfile
);
1720 struct type_list
*new = alloca (sizeof (*new));
1721 new->type
= arg_type
;
1722 new->next
= arg_types
;
1730 complaint (&symfile_complaints
,
1731 _("Prototyped function type didn't end arguments with `#':\n%s"),
1735 /* If there is just one argument whose type is `void', then
1736 that's just an empty argument list. */
1738 && ! arg_types
->next
1739 && TYPE_CODE (arg_types
->type
) == TYPE_CODE_VOID
)
1742 TYPE_FIELDS (func_type
)
1743 = (struct field
*) TYPE_ALLOC (func_type
,
1744 num_args
* sizeof (struct field
));
1745 memset (TYPE_FIELDS (func_type
), 0, num_args
* sizeof (struct field
));
1748 struct type_list
*t
;
1750 /* We stuck each argument type onto the front of the list
1751 when we read it, so the list is reversed. Build the
1752 fields array right-to-left. */
1753 for (t
= arg_types
, i
= num_args
- 1; t
; t
= t
->next
, i
--)
1754 TYPE_FIELD_TYPE (func_type
, i
) = t
->type
;
1756 TYPE_NFIELDS (func_type
) = num_args
;
1757 TYPE_FLAGS (func_type
) |= TYPE_FLAG_PROTOTYPED
;
1763 case 'k': /* Const qualifier on some type (Sun) */
1764 type
= read_type (pp
, objfile
);
1765 type
= make_cv_type (1, TYPE_VOLATILE (type
), type
,
1766 dbx_lookup_type (typenums
));
1769 case 'B': /* Volatile qual on some type (Sun) */
1770 type
= read_type (pp
, objfile
);
1771 type
= make_cv_type (TYPE_CONST (type
), 1, type
,
1772 dbx_lookup_type (typenums
));
1776 if (isdigit (**pp
) || **pp
== '(' || **pp
== '-')
1777 { /* Member (class & variable) type */
1778 /* FIXME -- we should be doing smash_to_XXX types here. */
1780 struct type
*domain
= read_type (pp
, objfile
);
1781 struct type
*memtype
;
1784 /* Invalid member type data format. */
1785 return error_type (pp
, objfile
);
1788 memtype
= read_type (pp
, objfile
);
1789 type
= dbx_alloc_type (typenums
, objfile
);
1790 smash_to_memberptr_type (type
, domain
, memtype
);
1793 /* type attribute */
1796 /* Skip to the semicolon. */
1797 while (**pp
!= ';' && **pp
!= '\0')
1800 return error_type (pp
, objfile
);
1802 ++ * pp
; /* Skip the semicolon. */
1806 case 's': /* Size attribute */
1807 type_size
= atoi (attr
+ 1);
1812 case 'S': /* String attribute */
1813 /* FIXME: check to see if following type is array? */
1817 case 'V': /* Vector attribute */
1818 /* FIXME: check to see if following type is array? */
1823 /* Ignore unrecognized type attributes, so future compilers
1824 can invent new ones. */
1832 case '#': /* Method (class & fn) type */
1833 if ((*pp
)[0] == '#')
1835 /* We'll get the parameter types from the name. */
1836 struct type
*return_type
;
1839 return_type
= read_type (pp
, objfile
);
1840 if (*(*pp
)++ != ';')
1841 complaint (&symfile_complaints
,
1842 _("invalid (minimal) member type data format at symtab pos %d."),
1844 type
= allocate_stub_method (return_type
);
1845 if (typenums
[0] != -1)
1846 *dbx_lookup_type (typenums
) = type
;
1850 struct type
*domain
= read_type (pp
, objfile
);
1851 struct type
*return_type
;
1856 /* Invalid member type data format. */
1857 return error_type (pp
, objfile
);
1861 return_type
= read_type (pp
, objfile
);
1862 args
= read_args (pp
, ';', objfile
, &nargs
, &varargs
);
1864 return error_type (pp
, objfile
);
1865 type
= dbx_alloc_type (typenums
, objfile
);
1866 smash_to_method_type (type
, domain
, return_type
, args
,
1871 case 'r': /* Range type */
1872 type
= read_range_type (pp
, typenums
, type_size
, objfile
);
1873 if (typenums
[0] != -1)
1874 *dbx_lookup_type (typenums
) = type
;
1879 /* Sun ACC builtin int type */
1880 type
= read_sun_builtin_type (pp
, typenums
, objfile
);
1881 if (typenums
[0] != -1)
1882 *dbx_lookup_type (typenums
) = type
;
1886 case 'R': /* Sun ACC builtin float type */
1887 type
= read_sun_floating_type (pp
, typenums
, objfile
);
1888 if (typenums
[0] != -1)
1889 *dbx_lookup_type (typenums
) = type
;
1892 case 'e': /* Enumeration type */
1893 type
= dbx_alloc_type (typenums
, objfile
);
1894 type
= read_enum_type (pp
, type
, objfile
);
1895 if (typenums
[0] != -1)
1896 *dbx_lookup_type (typenums
) = type
;
1899 case 's': /* Struct type */
1900 case 'u': /* Union type */
1902 enum type_code type_code
= TYPE_CODE_UNDEF
;
1903 type
= dbx_alloc_type (typenums
, objfile
);
1904 switch (type_descriptor
)
1907 type_code
= TYPE_CODE_STRUCT
;
1910 type_code
= TYPE_CODE_UNION
;
1913 type
= read_struct_type (pp
, type
, type_code
, objfile
);
1917 case 'a': /* Array type */
1919 return error_type (pp
, objfile
);
1922 type
= dbx_alloc_type (typenums
, objfile
);
1923 type
= read_array_type (pp
, type
, objfile
);
1925 TYPE_CODE (type
) = TYPE_CODE_STRING
;
1927 TYPE_FLAGS (type
) |= TYPE_FLAG_VECTOR
;
1930 case 'S': /* Set or bitstring type */
1931 type1
= read_type (pp
, objfile
);
1932 type
= create_set_type ((struct type
*) NULL
, type1
);
1934 TYPE_CODE (type
) = TYPE_CODE_BITSTRING
;
1935 if (typenums
[0] != -1)
1936 *dbx_lookup_type (typenums
) = type
;
1940 --*pp
; /* Go back to the symbol in error */
1941 /* Particularly important if it was \0! */
1942 return error_type (pp
, objfile
);
1947 warning (_("GDB internal error, type is NULL in stabsread.c."));
1948 return error_type (pp
, objfile
);
1951 /* Size specified in a type attribute overrides any other size. */
1952 if (type_size
!= -1)
1953 TYPE_LENGTH (type
) = (type_size
+ TARGET_CHAR_BIT
- 1) / TARGET_CHAR_BIT
;
1958 /* RS/6000 xlc/dbx combination uses a set of builtin types, starting from -1.
1959 Return the proper type node for a given builtin type number. */
1961 static struct type
*
1962 rs6000_builtin_type (int typenum
)
1964 /* We recognize types numbered from -NUMBER_RECOGNIZED to -1. */
1965 #define NUMBER_RECOGNIZED 34
1966 /* This includes an empty slot for type number -0. */
1967 static struct type
*negative_types
[NUMBER_RECOGNIZED
+ 1];
1968 struct type
*rettype
= NULL
;
1970 if (typenum
>= 0 || typenum
< -NUMBER_RECOGNIZED
)
1972 complaint (&symfile_complaints
, _("Unknown builtin type %d"), typenum
);
1973 return builtin_type_error
;
1975 if (negative_types
[-typenum
] != NULL
)
1976 return negative_types
[-typenum
];
1978 #if TARGET_CHAR_BIT != 8
1979 #error This code wrong for TARGET_CHAR_BIT not 8
1980 /* These definitions all assume that TARGET_CHAR_BIT is 8. I think
1981 that if that ever becomes not true, the correct fix will be to
1982 make the size in the struct type to be in bits, not in units of
1989 /* The size of this and all the other types are fixed, defined
1990 by the debugging format. If there is a type called "int" which
1991 is other than 32 bits, then it should use a new negative type
1992 number (or avoid negative type numbers for that case).
1993 See stabs.texinfo. */
1994 rettype
= init_type (TYPE_CODE_INT
, 4, 0, "int", NULL
);
1997 rettype
= init_type (TYPE_CODE_INT
, 1, 0, "char", NULL
);
2000 rettype
= init_type (TYPE_CODE_INT
, 2, 0, "short", NULL
);
2003 rettype
= init_type (TYPE_CODE_INT
, 4, 0, "long", NULL
);
2006 rettype
= init_type (TYPE_CODE_INT
, 1, TYPE_FLAG_UNSIGNED
,
2007 "unsigned char", NULL
);
2010 rettype
= init_type (TYPE_CODE_INT
, 1, 0, "signed char", NULL
);
2013 rettype
= init_type (TYPE_CODE_INT
, 2, TYPE_FLAG_UNSIGNED
,
2014 "unsigned short", NULL
);
2017 rettype
= init_type (TYPE_CODE_INT
, 4, TYPE_FLAG_UNSIGNED
,
2018 "unsigned int", NULL
);
2021 rettype
= init_type (TYPE_CODE_INT
, 4, TYPE_FLAG_UNSIGNED
,
2024 rettype
= init_type (TYPE_CODE_INT
, 4, TYPE_FLAG_UNSIGNED
,
2025 "unsigned long", NULL
);
2028 rettype
= init_type (TYPE_CODE_VOID
, 1, 0, "void", NULL
);
2031 /* IEEE single precision (32 bit). */
2032 rettype
= init_type (TYPE_CODE_FLT
, 4, 0, "float", NULL
);
2035 /* IEEE double precision (64 bit). */
2036 rettype
= init_type (TYPE_CODE_FLT
, 8, 0, "double", NULL
);
2039 /* This is an IEEE double on the RS/6000, and different machines with
2040 different sizes for "long double" should use different negative
2041 type numbers. See stabs.texinfo. */
2042 rettype
= init_type (TYPE_CODE_FLT
, 8, 0, "long double", NULL
);
2045 rettype
= init_type (TYPE_CODE_INT
, 4, 0, "integer", NULL
);
2048 rettype
= init_type (TYPE_CODE_BOOL
, 4, TYPE_FLAG_UNSIGNED
,
2052 rettype
= init_type (TYPE_CODE_FLT
, 4, 0, "short real", NULL
);
2055 rettype
= init_type (TYPE_CODE_FLT
, 8, 0, "real", NULL
);
2058 rettype
= init_type (TYPE_CODE_ERROR
, 0, 0, "stringptr", NULL
);
2061 rettype
= init_type (TYPE_CODE_CHAR
, 1, TYPE_FLAG_UNSIGNED
,
2065 rettype
= init_type (TYPE_CODE_BOOL
, 1, TYPE_FLAG_UNSIGNED
,
2069 rettype
= init_type (TYPE_CODE_BOOL
, 2, TYPE_FLAG_UNSIGNED
,
2073 rettype
= init_type (TYPE_CODE_BOOL
, 4, TYPE_FLAG_UNSIGNED
,
2077 rettype
= init_type (TYPE_CODE_BOOL
, 4, TYPE_FLAG_UNSIGNED
,
2081 /* Complex type consisting of two IEEE single precision values. */
2082 rettype
= init_type (TYPE_CODE_COMPLEX
, 8, 0, "complex", NULL
);
2083 TYPE_TARGET_TYPE (rettype
) = init_type (TYPE_CODE_FLT
, 4, 0, "float",
2087 /* Complex type consisting of two IEEE double precision values. */
2088 rettype
= init_type (TYPE_CODE_COMPLEX
, 16, 0, "double complex", NULL
);
2089 TYPE_TARGET_TYPE (rettype
) = init_type (TYPE_CODE_FLT
, 8, 0, "double",
2093 rettype
= init_type (TYPE_CODE_INT
, 1, 0, "integer*1", NULL
);
2096 rettype
= init_type (TYPE_CODE_INT
, 2, 0, "integer*2", NULL
);
2099 rettype
= init_type (TYPE_CODE_INT
, 4, 0, "integer*4", NULL
);
2102 rettype
= init_type (TYPE_CODE_CHAR
, 2, 0, "wchar", NULL
);
2105 rettype
= init_type (TYPE_CODE_INT
, 8, 0, "long long", NULL
);
2108 rettype
= init_type (TYPE_CODE_INT
, 8, TYPE_FLAG_UNSIGNED
,
2109 "unsigned long long", NULL
);
2112 rettype
= init_type (TYPE_CODE_INT
, 8, TYPE_FLAG_UNSIGNED
,
2116 rettype
= init_type (TYPE_CODE_INT
, 8, 0, "integer*8", NULL
);
2119 negative_types
[-typenum
] = rettype
;
2123 /* This page contains subroutines of read_type. */
2125 /* Replace *OLD_NAME with the method name portion of PHYSNAME. */
2128 update_method_name_from_physname (char **old_name
, char *physname
)
2132 method_name
= method_name_from_physname (physname
);
2134 if (method_name
== NULL
)
2136 complaint (&symfile_complaints
,
2137 _("Method has bad physname %s\n"), physname
);
2141 if (strcmp (*old_name
, method_name
) != 0)
2144 *old_name
= method_name
;
2147 xfree (method_name
);
2150 /* Read member function stabs info for C++ classes. The form of each member
2153 NAME :: TYPENUM[=type definition] ARGS : PHYSNAME ;
2155 An example with two member functions is:
2157 afunc1::20=##15;:i;2A.;afunc2::20:i;2A.;
2159 For the case of overloaded operators, the format is op$::*.funcs, where
2160 $ is the CPLUS_MARKER (usually '$'), `*' holds the place for an operator
2161 name (such as `+=') and `.' marks the end of the operator name.
2163 Returns 1 for success, 0 for failure. */
2166 read_member_functions (struct field_info
*fip
, char **pp
, struct type
*type
,
2167 struct objfile
*objfile
)
2171 /* Total number of member functions defined in this class. If the class
2172 defines two `f' functions, and one `g' function, then this will have
2174 int total_length
= 0;
2178 struct next_fnfield
*next
;
2179 struct fn_field fn_field
;
2182 struct type
*look_ahead_type
;
2183 struct next_fnfieldlist
*new_fnlist
;
2184 struct next_fnfield
*new_sublist
;
2188 /* Process each list until we find something that is not a member function
2189 or find the end of the functions. */
2193 /* We should be positioned at the start of the function name.
2194 Scan forward to find the first ':' and if it is not the
2195 first of a "::" delimiter, then this is not a member function. */
2207 look_ahead_type
= NULL
;
2210 new_fnlist
= (struct next_fnfieldlist
*)
2211 xmalloc (sizeof (struct next_fnfieldlist
));
2212 make_cleanup (xfree
, new_fnlist
);
2213 memset (new_fnlist
, 0, sizeof (struct next_fnfieldlist
));
2215 if ((*pp
)[0] == 'o' && (*pp
)[1] == 'p' && is_cplus_marker ((*pp
)[2]))
2217 /* This is a completely wierd case. In order to stuff in the
2218 names that might contain colons (the usual name delimiter),
2219 Mike Tiemann defined a different name format which is
2220 signalled if the identifier is "op$". In that case, the
2221 format is "op$::XXXX." where XXXX is the name. This is
2222 used for names like "+" or "=". YUUUUUUUK! FIXME! */
2223 /* This lets the user type "break operator+".
2224 We could just put in "+" as the name, but that wouldn't
2226 static char opname
[32] = "op$";
2227 char *o
= opname
+ 3;
2229 /* Skip past '::'. */
2232 STABS_CONTINUE (pp
, objfile
);
2238 main_fn_name
= savestring (opname
, o
- opname
);
2244 main_fn_name
= savestring (*pp
, p
- *pp
);
2245 /* Skip past '::'. */
2248 new_fnlist
->fn_fieldlist
.name
= main_fn_name
;
2253 (struct next_fnfield
*) xmalloc (sizeof (struct next_fnfield
));
2254 make_cleanup (xfree
, new_sublist
);
2255 memset (new_sublist
, 0, sizeof (struct next_fnfield
));
2257 /* Check for and handle cretinous dbx symbol name continuation! */
2258 if (look_ahead_type
== NULL
)
2261 STABS_CONTINUE (pp
, objfile
);
2263 new_sublist
->fn_field
.type
= read_type (pp
, objfile
);
2266 /* Invalid symtab info for member function. */
2272 /* g++ version 1 kludge */
2273 new_sublist
->fn_field
.type
= look_ahead_type
;
2274 look_ahead_type
= NULL
;
2284 /* If this is just a stub, then we don't have the real name here. */
2286 if (TYPE_STUB (new_sublist
->fn_field
.type
))
2288 if (!TYPE_DOMAIN_TYPE (new_sublist
->fn_field
.type
))
2289 TYPE_DOMAIN_TYPE (new_sublist
->fn_field
.type
) = type
;
2290 new_sublist
->fn_field
.is_stub
= 1;
2292 new_sublist
->fn_field
.physname
= savestring (*pp
, p
- *pp
);
2295 /* Set this member function's visibility fields. */
2298 case VISIBILITY_PRIVATE
:
2299 new_sublist
->fn_field
.is_private
= 1;
2301 case VISIBILITY_PROTECTED
:
2302 new_sublist
->fn_field
.is_protected
= 1;
2306 STABS_CONTINUE (pp
, objfile
);
2309 case 'A': /* Normal functions. */
2310 new_sublist
->fn_field
.is_const
= 0;
2311 new_sublist
->fn_field
.is_volatile
= 0;
2314 case 'B': /* `const' member functions. */
2315 new_sublist
->fn_field
.is_const
= 1;
2316 new_sublist
->fn_field
.is_volatile
= 0;
2319 case 'C': /* `volatile' member function. */
2320 new_sublist
->fn_field
.is_const
= 0;
2321 new_sublist
->fn_field
.is_volatile
= 1;
2324 case 'D': /* `const volatile' member function. */
2325 new_sublist
->fn_field
.is_const
= 1;
2326 new_sublist
->fn_field
.is_volatile
= 1;
2329 case '*': /* File compiled with g++ version 1 -- no info */
2334 complaint (&symfile_complaints
,
2335 _("const/volatile indicator missing, got '%c'"), **pp
);
2344 /* virtual member function, followed by index.
2345 The sign bit is set to distinguish pointers-to-methods
2346 from virtual function indicies. Since the array is
2347 in words, the quantity must be shifted left by 1
2348 on 16 bit machine, and by 2 on 32 bit machine, forcing
2349 the sign bit out, and usable as a valid index into
2350 the array. Remove the sign bit here. */
2351 new_sublist
->fn_field
.voffset
=
2352 (0x7fffffff & read_huge_number (pp
, ';', &nbits
, 0)) + 2;
2356 STABS_CONTINUE (pp
, objfile
);
2357 if (**pp
== ';' || **pp
== '\0')
2359 /* Must be g++ version 1. */
2360 new_sublist
->fn_field
.fcontext
= 0;
2364 /* Figure out from whence this virtual function came.
2365 It may belong to virtual function table of
2366 one of its baseclasses. */
2367 look_ahead_type
= read_type (pp
, objfile
);
2370 /* g++ version 1 overloaded methods. */
2374 new_sublist
->fn_field
.fcontext
= look_ahead_type
;
2383 look_ahead_type
= NULL
;
2389 /* static member function. */
2391 int slen
= strlen (main_fn_name
);
2393 new_sublist
->fn_field
.voffset
= VOFFSET_STATIC
;
2395 /* For static member functions, we can't tell if they
2396 are stubbed, as they are put out as functions, and not as
2398 GCC v2 emits the fully mangled name if
2399 dbxout.c:flag_minimal_debug is not set, so we have to
2400 detect a fully mangled physname here and set is_stub
2401 accordingly. Fully mangled physnames in v2 start with
2402 the member function name, followed by two underscores.
2403 GCC v3 currently always emits stubbed member functions,
2404 but with fully mangled physnames, which start with _Z. */
2405 if (!(strncmp (new_sublist
->fn_field
.physname
,
2406 main_fn_name
, slen
) == 0
2407 && new_sublist
->fn_field
.physname
[slen
] == '_'
2408 && new_sublist
->fn_field
.physname
[slen
+ 1] == '_'))
2410 new_sublist
->fn_field
.is_stub
= 1;
2417 complaint (&symfile_complaints
,
2418 _("member function type missing, got '%c'"), (*pp
)[-1]);
2419 /* Fall through into normal member function. */
2422 /* normal member function. */
2423 new_sublist
->fn_field
.voffset
= 0;
2424 new_sublist
->fn_field
.fcontext
= 0;
2428 new_sublist
->next
= sublist
;
2429 sublist
= new_sublist
;
2431 STABS_CONTINUE (pp
, objfile
);
2433 while (**pp
!= ';' && **pp
!= '\0');
2436 STABS_CONTINUE (pp
, objfile
);
2438 /* Skip GCC 3.X member functions which are duplicates of the callable
2439 constructor/destructor. */
2440 if (strcmp (main_fn_name
, "__base_ctor") == 0
2441 || strcmp (main_fn_name
, "__base_dtor") == 0
2442 || strcmp (main_fn_name
, "__deleting_dtor") == 0)
2444 xfree (main_fn_name
);
2449 int has_destructor
= 0, has_other
= 0;
2451 struct next_fnfield
*tmp_sublist
;
2453 /* Various versions of GCC emit various mostly-useless
2454 strings in the name field for special member functions.
2456 For stub methods, we need to defer correcting the name
2457 until we are ready to unstub the method, because the current
2458 name string is used by gdb_mangle_name. The only stub methods
2459 of concern here are GNU v2 operators; other methods have their
2460 names correct (see caveat below).
2462 For non-stub methods, in GNU v3, we have a complete physname.
2463 Therefore we can safely correct the name now. This primarily
2464 affects constructors and destructors, whose name will be
2465 __comp_ctor or __comp_dtor instead of Foo or ~Foo. Cast
2466 operators will also have incorrect names; for instance,
2467 "operator int" will be named "operator i" (i.e. the type is
2470 For non-stub methods in GNU v2, we have no easy way to
2471 know if we have a complete physname or not. For most
2472 methods the result depends on the platform (if CPLUS_MARKER
2473 can be `$' or `.', it will use minimal debug information, or
2474 otherwise the full physname will be included).
2476 Rather than dealing with this, we take a different approach.
2477 For v3 mangled names, we can use the full physname; for v2,
2478 we use cplus_demangle_opname (which is actually v2 specific),
2479 because the only interesting names are all operators - once again
2480 barring the caveat below. Skip this process if any method in the
2481 group is a stub, to prevent our fouling up the workings of
2484 The caveat: GCC 2.95.x (and earlier?) put constructors and
2485 destructors in the same method group. We need to split this
2486 into two groups, because they should have different names.
2487 So for each method group we check whether it contains both
2488 routines whose physname appears to be a destructor (the physnames
2489 for and destructors are always provided, due to quirks in v2
2490 mangling) and routines whose physname does not appear to be a
2491 destructor. If so then we break up the list into two halves.
2492 Even if the constructors and destructors aren't in the same group
2493 the destructor will still lack the leading tilde, so that also
2496 So, to summarize what we expect and handle here:
2498 Given Given Real Real Action
2499 method name physname physname method name
2501 __opi [none] __opi__3Foo operator int opname
2503 Foo _._3Foo _._3Foo ~Foo separate and
2505 operator i _ZN3FoocviEv _ZN3FoocviEv operator int demangle
2506 __comp_ctor _ZN3FooC1ERKS_ _ZN3FooC1ERKS_ Foo demangle
2509 tmp_sublist
= sublist
;
2510 while (tmp_sublist
!= NULL
)
2512 if (tmp_sublist
->fn_field
.is_stub
)
2514 if (tmp_sublist
->fn_field
.physname
[0] == '_'
2515 && tmp_sublist
->fn_field
.physname
[1] == 'Z')
2518 if (is_destructor_name (tmp_sublist
->fn_field
.physname
))
2523 tmp_sublist
= tmp_sublist
->next
;
2526 if (has_destructor
&& has_other
)
2528 struct next_fnfieldlist
*destr_fnlist
;
2529 struct next_fnfield
*last_sublist
;
2531 /* Create a new fn_fieldlist for the destructors. */
2533 destr_fnlist
= (struct next_fnfieldlist
*)
2534 xmalloc (sizeof (struct next_fnfieldlist
));
2535 make_cleanup (xfree
, destr_fnlist
);
2536 memset (destr_fnlist
, 0, sizeof (struct next_fnfieldlist
));
2537 destr_fnlist
->fn_fieldlist
.name
2538 = obconcat (&objfile
->objfile_obstack
, "", "~",
2539 new_fnlist
->fn_fieldlist
.name
);
2541 destr_fnlist
->fn_fieldlist
.fn_fields
= (struct fn_field
*)
2542 obstack_alloc (&objfile
->objfile_obstack
,
2543 sizeof (struct fn_field
) * has_destructor
);
2544 memset (destr_fnlist
->fn_fieldlist
.fn_fields
, 0,
2545 sizeof (struct fn_field
) * has_destructor
);
2546 tmp_sublist
= sublist
;
2547 last_sublist
= NULL
;
2549 while (tmp_sublist
!= NULL
)
2551 if (!is_destructor_name (tmp_sublist
->fn_field
.physname
))
2553 tmp_sublist
= tmp_sublist
->next
;
2557 destr_fnlist
->fn_fieldlist
.fn_fields
[i
++]
2558 = tmp_sublist
->fn_field
;
2560 last_sublist
->next
= tmp_sublist
->next
;
2562 sublist
= tmp_sublist
->next
;
2563 last_sublist
= tmp_sublist
;
2564 tmp_sublist
= tmp_sublist
->next
;
2567 destr_fnlist
->fn_fieldlist
.length
= has_destructor
;
2568 destr_fnlist
->next
= fip
->fnlist
;
2569 fip
->fnlist
= destr_fnlist
;
2571 total_length
+= has_destructor
;
2572 length
-= has_destructor
;
2576 /* v3 mangling prevents the use of abbreviated physnames,
2577 so we can do this here. There are stubbed methods in v3
2579 - in -gstabs instead of -gstabs+
2580 - or for static methods, which are output as a function type
2581 instead of a method type. */
2583 update_method_name_from_physname (&new_fnlist
->fn_fieldlist
.name
,
2584 sublist
->fn_field
.physname
);
2586 else if (has_destructor
&& new_fnlist
->fn_fieldlist
.name
[0] != '~')
2588 new_fnlist
->fn_fieldlist
.name
=
2589 concat ("~", main_fn_name
, (char *)NULL
);
2590 xfree (main_fn_name
);
2594 char dem_opname
[256];
2596 ret
= cplus_demangle_opname (new_fnlist
->fn_fieldlist
.name
,
2597 dem_opname
, DMGL_ANSI
);
2599 ret
= cplus_demangle_opname (new_fnlist
->fn_fieldlist
.name
,
2602 new_fnlist
->fn_fieldlist
.name
2603 = obsavestring (dem_opname
, strlen (dem_opname
),
2604 &objfile
->objfile_obstack
);
2607 new_fnlist
->fn_fieldlist
.fn_fields
= (struct fn_field
*)
2608 obstack_alloc (&objfile
->objfile_obstack
,
2609 sizeof (struct fn_field
) * length
);
2610 memset (new_fnlist
->fn_fieldlist
.fn_fields
, 0,
2611 sizeof (struct fn_field
) * length
);
2612 for (i
= length
; (i
--, sublist
); sublist
= sublist
->next
)
2614 new_fnlist
->fn_fieldlist
.fn_fields
[i
] = sublist
->fn_field
;
2617 new_fnlist
->fn_fieldlist
.length
= length
;
2618 new_fnlist
->next
= fip
->fnlist
;
2619 fip
->fnlist
= new_fnlist
;
2621 total_length
+= length
;
2627 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
2628 TYPE_FN_FIELDLISTS (type
) = (struct fn_fieldlist
*)
2629 TYPE_ALLOC (type
, sizeof (struct fn_fieldlist
) * nfn_fields
);
2630 memset (TYPE_FN_FIELDLISTS (type
), 0,
2631 sizeof (struct fn_fieldlist
) * nfn_fields
);
2632 TYPE_NFN_FIELDS (type
) = nfn_fields
;
2633 TYPE_NFN_FIELDS_TOTAL (type
) = total_length
;
2639 /* Special GNU C++ name.
2641 Returns 1 for success, 0 for failure. "failure" means that we can't
2642 keep parsing and it's time for error_type(). */
2645 read_cpp_abbrev (struct field_info
*fip
, char **pp
, struct type
*type
,
2646 struct objfile
*objfile
)
2651 struct type
*context
;
2661 /* At this point, *pp points to something like "22:23=*22...",
2662 where the type number before the ':' is the "context" and
2663 everything after is a regular type definition. Lookup the
2664 type, find it's name, and construct the field name. */
2666 context
= read_type (pp
, objfile
);
2670 case 'f': /* $vf -- a virtual function table pointer */
2671 name
= type_name_no_tag (context
);
2676 fip
->list
->field
.name
=
2677 obconcat (&objfile
->objfile_obstack
, vptr_name
, name
, "");
2680 case 'b': /* $vb -- a virtual bsomethingorother */
2681 name
= type_name_no_tag (context
);
2684 complaint (&symfile_complaints
,
2685 _("C++ abbreviated type name unknown at symtab pos %d"),
2689 fip
->list
->field
.name
=
2690 obconcat (&objfile
->objfile_obstack
, vb_name
, name
, "");
2694 invalid_cpp_abbrev_complaint (*pp
);
2695 fip
->list
->field
.name
=
2696 obconcat (&objfile
->objfile_obstack
,
2697 "INVALID_CPLUSPLUS_ABBREV", "", "");
2701 /* At this point, *pp points to the ':'. Skip it and read the
2707 invalid_cpp_abbrev_complaint (*pp
);
2710 fip
->list
->field
.type
= read_type (pp
, objfile
);
2712 (*pp
)++; /* Skip the comma. */
2718 FIELD_BITPOS (fip
->list
->field
) = read_huge_number (pp
, ';', &nbits
,
2723 /* This field is unpacked. */
2724 FIELD_BITSIZE (fip
->list
->field
) = 0;
2725 fip
->list
->visibility
= VISIBILITY_PRIVATE
;
2729 invalid_cpp_abbrev_complaint (*pp
);
2730 /* We have no idea what syntax an unrecognized abbrev would have, so
2731 better return 0. If we returned 1, we would need to at least advance
2732 *pp to avoid an infinite loop. */
2739 read_one_struct_field (struct field_info
*fip
, char **pp
, char *p
,
2740 struct type
*type
, struct objfile
*objfile
)
2742 fip
->list
->field
.name
=
2743 obsavestring (*pp
, p
- *pp
, &objfile
->objfile_obstack
);
2746 /* This means we have a visibility for a field coming. */
2750 fip
->list
->visibility
= *(*pp
)++;
2754 /* normal dbx-style format, no explicit visibility */
2755 fip
->list
->visibility
= VISIBILITY_PUBLIC
;
2758 fip
->list
->field
.type
= read_type (pp
, objfile
);
2763 /* Possible future hook for nested types. */
2766 fip
->list
->field
.bitpos
= (long) -2; /* nested type */
2776 /* Static class member. */
2777 SET_FIELD_PHYSNAME (fip
->list
->field
, savestring (*pp
, p
- *pp
));
2781 else if (**pp
!= ',')
2783 /* Bad structure-type format. */
2784 stabs_general_complaint ("bad structure-type format");
2788 (*pp
)++; /* Skip the comma. */
2792 FIELD_BITPOS (fip
->list
->field
) = read_huge_number (pp
, ',', &nbits
, 0);
2795 stabs_general_complaint ("bad structure-type format");
2798 FIELD_BITSIZE (fip
->list
->field
) = read_huge_number (pp
, ';', &nbits
, 0);
2801 stabs_general_complaint ("bad structure-type format");
2806 if (FIELD_BITPOS (fip
->list
->field
) == 0
2807 && FIELD_BITSIZE (fip
->list
->field
) == 0)
2809 /* This can happen in two cases: (1) at least for gcc 2.4.5 or so,
2810 it is a field which has been optimized out. The correct stab for
2811 this case is to use VISIBILITY_IGNORE, but that is a recent
2812 invention. (2) It is a 0-size array. For example
2813 union { int num; char str[0]; } foo. Printing _("<no value>" for
2814 str in "p foo" is OK, since foo.str (and thus foo.str[3])
2815 will continue to work, and a 0-size array as a whole doesn't
2816 have any contents to print.
2818 I suspect this probably could also happen with gcc -gstabs (not
2819 -gstabs+) for static fields, and perhaps other C++ extensions.
2820 Hopefully few people use -gstabs with gdb, since it is intended
2821 for dbx compatibility. */
2823 /* Ignore this field. */
2824 fip
->list
->visibility
= VISIBILITY_IGNORE
;
2828 /* Detect an unpacked field and mark it as such.
2829 dbx gives a bit size for all fields.
2830 Note that forward refs cannot be packed,
2831 and treat enums as if they had the width of ints. */
2833 struct type
*field_type
= check_typedef (FIELD_TYPE (fip
->list
->field
));
2835 if (TYPE_CODE (field_type
) != TYPE_CODE_INT
2836 && TYPE_CODE (field_type
) != TYPE_CODE_RANGE
2837 && TYPE_CODE (field_type
) != TYPE_CODE_BOOL
2838 && TYPE_CODE (field_type
) != TYPE_CODE_ENUM
)
2840 FIELD_BITSIZE (fip
->list
->field
) = 0;
2842 if ((FIELD_BITSIZE (fip
->list
->field
)
2843 == TARGET_CHAR_BIT
* TYPE_LENGTH (field_type
)
2844 || (TYPE_CODE (field_type
) == TYPE_CODE_ENUM
2845 && FIELD_BITSIZE (fip
->list
->field
)
2846 == gdbarch_int_bit (current_gdbarch
))
2849 FIELD_BITPOS (fip
->list
->field
) % 8 == 0)
2851 FIELD_BITSIZE (fip
->list
->field
) = 0;
2857 /* Read struct or class data fields. They have the form:
2859 NAME : [VISIBILITY] TYPENUM , BITPOS , BITSIZE ;
2861 At the end, we see a semicolon instead of a field.
2863 In C++, this may wind up being NAME:?TYPENUM:PHYSNAME; for
2866 The optional VISIBILITY is one of:
2868 '/0' (VISIBILITY_PRIVATE)
2869 '/1' (VISIBILITY_PROTECTED)
2870 '/2' (VISIBILITY_PUBLIC)
2871 '/9' (VISIBILITY_IGNORE)
2873 or nothing, for C style fields with public visibility.
2875 Returns 1 for success, 0 for failure. */
2878 read_struct_fields (struct field_info
*fip
, char **pp
, struct type
*type
,
2879 struct objfile
*objfile
)
2882 struct nextfield
*new;
2884 /* We better set p right now, in case there are no fields at all... */
2888 /* Read each data member type until we find the terminating ';' at the end of
2889 the data member list, or break for some other reason such as finding the
2890 start of the member function list. */
2891 /* Stab string for structure/union does not end with two ';' in
2892 SUN C compiler 5.3 i.e. F6U2, hence check for end of string. */
2894 while (**pp
!= ';' && **pp
!= '\0')
2896 STABS_CONTINUE (pp
, objfile
);
2897 /* Get space to record the next field's data. */
2898 new = (struct nextfield
*) xmalloc (sizeof (struct nextfield
));
2899 make_cleanup (xfree
, new);
2900 memset (new, 0, sizeof (struct nextfield
));
2901 new->next
= fip
->list
;
2904 /* Get the field name. */
2907 /* If is starts with CPLUS_MARKER it is a special abbreviation,
2908 unless the CPLUS_MARKER is followed by an underscore, in
2909 which case it is just the name of an anonymous type, which we
2910 should handle like any other type name. */
2912 if (is_cplus_marker (p
[0]) && p
[1] != '_')
2914 if (!read_cpp_abbrev (fip
, pp
, type
, objfile
))
2919 /* Look for the ':' that separates the field name from the field
2920 values. Data members are delimited by a single ':', while member
2921 functions are delimited by a pair of ':'s. When we hit the member
2922 functions (if any), terminate scan loop and return. */
2924 while (*p
!= ':' && *p
!= '\0')
2931 /* Check to see if we have hit the member functions yet. */
2936 read_one_struct_field (fip
, pp
, p
, type
, objfile
);
2938 if (p
[0] == ':' && p
[1] == ':')
2940 /* (the deleted) chill the list of fields: the last entry (at
2941 the head) is a partially constructed entry which we now
2943 fip
->list
= fip
->list
->next
;
2948 /* The stabs for C++ derived classes contain baseclass information which
2949 is marked by a '!' character after the total size. This function is
2950 called when we encounter the baseclass marker, and slurps up all the
2951 baseclass information.
2953 Immediately following the '!' marker is the number of base classes that
2954 the class is derived from, followed by information for each base class.
2955 For each base class, there are two visibility specifiers, a bit offset
2956 to the base class information within the derived class, a reference to
2957 the type for the base class, and a terminating semicolon.
2959 A typical example, with two base classes, would be "!2,020,19;0264,21;".
2961 Baseclass information marker __________________|| | | | | | |
2962 Number of baseclasses __________________________| | | | | | |
2963 Visibility specifiers (2) ________________________| | | | | |
2964 Offset in bits from start of class _________________| | | | |
2965 Type number for base class ___________________________| | | |
2966 Visibility specifiers (2) _______________________________| | |
2967 Offset in bits from start of class ________________________| |
2968 Type number of base class ____________________________________|
2970 Return 1 for success, 0 for (error-type-inducing) failure. */
2976 read_baseclasses (struct field_info
*fip
, char **pp
, struct type
*type
,
2977 struct objfile
*objfile
)
2980 struct nextfield
*new;
2988 /* Skip the '!' baseclass information marker. */
2992 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
2995 TYPE_N_BASECLASSES (type
) = read_huge_number (pp
, ',', &nbits
, 0);
3001 /* Some stupid compilers have trouble with the following, so break
3002 it up into simpler expressions. */
3003 TYPE_FIELD_VIRTUAL_BITS (type
) = (B_TYPE
*)
3004 TYPE_ALLOC (type
, B_BYTES (TYPE_N_BASECLASSES (type
)));
3007 int num_bytes
= B_BYTES (TYPE_N_BASECLASSES (type
));
3010 pointer
= (char *) TYPE_ALLOC (type
, num_bytes
);
3011 TYPE_FIELD_VIRTUAL_BITS (type
) = (B_TYPE
*) pointer
;
3015 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type
), TYPE_N_BASECLASSES (type
));
3017 for (i
= 0; i
< TYPE_N_BASECLASSES (type
); i
++)
3019 new = (struct nextfield
*) xmalloc (sizeof (struct nextfield
));
3020 make_cleanup (xfree
, new);
3021 memset (new, 0, sizeof (struct nextfield
));
3022 new->next
= fip
->list
;
3024 FIELD_BITSIZE (new->field
) = 0; /* this should be an unpacked field! */
3026 STABS_CONTINUE (pp
, objfile
);
3030 /* Nothing to do. */
3033 SET_TYPE_FIELD_VIRTUAL (type
, i
);
3036 /* Unknown character. Complain and treat it as non-virtual. */
3038 complaint (&symfile_complaints
,
3039 _("Unknown virtual character `%c' for baseclass"), **pp
);
3044 new->visibility
= *(*pp
)++;
3045 switch (new->visibility
)
3047 case VISIBILITY_PRIVATE
:
3048 case VISIBILITY_PROTECTED
:
3049 case VISIBILITY_PUBLIC
:
3052 /* Bad visibility format. Complain and treat it as
3055 complaint (&symfile_complaints
,
3056 _("Unknown visibility `%c' for baseclass"),
3058 new->visibility
= VISIBILITY_PUBLIC
;
3065 /* The remaining value is the bit offset of the portion of the object
3066 corresponding to this baseclass. Always zero in the absence of
3067 multiple inheritance. */
3069 FIELD_BITPOS (new->field
) = read_huge_number (pp
, ',', &nbits
, 0);
3074 /* The last piece of baseclass information is the type of the
3075 base class. Read it, and remember it's type name as this
3078 new->field
.type
= read_type (pp
, objfile
);
3079 new->field
.name
= type_name_no_tag (new->field
.type
);
3081 /* skip trailing ';' and bump count of number of fields seen */
3090 /* The tail end of stabs for C++ classes that contain a virtual function
3091 pointer contains a tilde, a %, and a type number.
3092 The type number refers to the base class (possibly this class itself) which
3093 contains the vtable pointer for the current class.
3095 This function is called when we have parsed all the method declarations,
3096 so we can look for the vptr base class info. */
3099 read_tilde_fields (struct field_info
*fip
, char **pp
, struct type
*type
,
3100 struct objfile
*objfile
)
3104 STABS_CONTINUE (pp
, objfile
);
3106 /* If we are positioned at a ';', then skip it. */
3116 if (**pp
== '=' || **pp
== '+' || **pp
== '-')
3118 /* Obsolete flags that used to indicate the presence
3119 of constructors and/or destructors. */
3123 /* Read either a '%' or the final ';'. */
3124 if (*(*pp
)++ == '%')
3126 /* The next number is the type number of the base class
3127 (possibly our own class) which supplies the vtable for
3128 this class. Parse it out, and search that class to find
3129 its vtable pointer, and install those into TYPE_VPTR_BASETYPE
3130 and TYPE_VPTR_FIELDNO. */
3135 t
= read_type (pp
, objfile
);
3137 while (*p
!= '\0' && *p
!= ';')
3143 /* Premature end of symbol. */
3147 TYPE_VPTR_BASETYPE (type
) = t
;
3148 if (type
== t
) /* Our own class provides vtbl ptr */
3150 for (i
= TYPE_NFIELDS (t
) - 1;
3151 i
>= TYPE_N_BASECLASSES (t
);
3154 char *name
= TYPE_FIELD_NAME (t
, i
);
3155 if (!strncmp (name
, vptr_name
, sizeof (vptr_name
) - 2)
3156 && is_cplus_marker (name
[sizeof (vptr_name
) - 2]))
3158 TYPE_VPTR_FIELDNO (type
) = i
;
3162 /* Virtual function table field not found. */
3163 complaint (&symfile_complaints
,
3164 _("virtual function table pointer not found when defining class `%s'"),
3170 TYPE_VPTR_FIELDNO (type
) = TYPE_VPTR_FIELDNO (t
);
3181 attach_fn_fields_to_type (struct field_info
*fip
, struct type
*type
)
3185 for (n
= TYPE_NFN_FIELDS (type
);
3186 fip
->fnlist
!= NULL
;
3187 fip
->fnlist
= fip
->fnlist
->next
)
3189 --n
; /* Circumvent Sun3 compiler bug */
3190 TYPE_FN_FIELDLISTS (type
)[n
] = fip
->fnlist
->fn_fieldlist
;
3195 /* Create the vector of fields, and record how big it is.
3196 We need this info to record proper virtual function table information
3197 for this class's virtual functions. */
3200 attach_fields_to_type (struct field_info
*fip
, struct type
*type
,
3201 struct objfile
*objfile
)
3204 int non_public_fields
= 0;
3205 struct nextfield
*scan
;
3207 /* Count up the number of fields that we have, as well as taking note of
3208 whether or not there are any non-public fields, which requires us to
3209 allocate and build the private_field_bits and protected_field_bits
3212 for (scan
= fip
->list
; scan
!= NULL
; scan
= scan
->next
)
3215 if (scan
->visibility
!= VISIBILITY_PUBLIC
)
3217 non_public_fields
++;
3221 /* Now we know how many fields there are, and whether or not there are any
3222 non-public fields. Record the field count, allocate space for the
3223 array of fields, and create blank visibility bitfields if necessary. */
3225 TYPE_NFIELDS (type
) = nfields
;
3226 TYPE_FIELDS (type
) = (struct field
*)
3227 TYPE_ALLOC (type
, sizeof (struct field
) * nfields
);
3228 memset (TYPE_FIELDS (type
), 0, sizeof (struct field
) * nfields
);
3230 if (non_public_fields
)
3232 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
3234 TYPE_FIELD_PRIVATE_BITS (type
) =
3235 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
3236 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type
), nfields
);
3238 TYPE_FIELD_PROTECTED_BITS (type
) =
3239 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
3240 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type
), nfields
);
3242 TYPE_FIELD_IGNORE_BITS (type
) =
3243 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
3244 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type
), nfields
);
3247 /* Copy the saved-up fields into the field vector. Start from the head
3248 of the list, adding to the tail of the field array, so that they end
3249 up in the same order in the array in which they were added to the list. */
3251 while (nfields
-- > 0)
3253 TYPE_FIELD (type
, nfields
) = fip
->list
->field
;
3254 switch (fip
->list
->visibility
)
3256 case VISIBILITY_PRIVATE
:
3257 SET_TYPE_FIELD_PRIVATE (type
, nfields
);
3260 case VISIBILITY_PROTECTED
:
3261 SET_TYPE_FIELD_PROTECTED (type
, nfields
);
3264 case VISIBILITY_IGNORE
:
3265 SET_TYPE_FIELD_IGNORE (type
, nfields
);
3268 case VISIBILITY_PUBLIC
:
3272 /* Unknown visibility. Complain and treat it as public. */
3274 complaint (&symfile_complaints
, _("Unknown visibility `%c' for field"),
3275 fip
->list
->visibility
);
3279 fip
->list
= fip
->list
->next
;
3285 /* Complain that the compiler has emitted more than one definition for the
3286 structure type TYPE. */
3288 complain_about_struct_wipeout (struct type
*type
)
3293 if (TYPE_TAG_NAME (type
))
3295 name
= TYPE_TAG_NAME (type
);
3296 switch (TYPE_CODE (type
))
3298 case TYPE_CODE_STRUCT
: kind
= "struct "; break;
3299 case TYPE_CODE_UNION
: kind
= "union "; break;
3300 case TYPE_CODE_ENUM
: kind
= "enum "; break;
3304 else if (TYPE_NAME (type
))
3306 name
= TYPE_NAME (type
);
3315 complaint (&symfile_complaints
,
3316 _("struct/union type gets multiply defined: %s%s"), kind
, name
);
3320 /* Read the description of a structure (or union type) and return an object
3321 describing the type.
3323 PP points to a character pointer that points to the next unconsumed token
3324 in the the stabs string. For example, given stabs "A:T4=s4a:1,0,32;;",
3325 *PP will point to "4a:1,0,32;;".
3327 TYPE points to an incomplete type that needs to be filled in.
3329 OBJFILE points to the current objfile from which the stabs information is
3330 being read. (Note that it is redundant in that TYPE also contains a pointer
3331 to this same objfile, so it might be a good idea to eliminate it. FIXME).
3334 static struct type
*
3335 read_struct_type (char **pp
, struct type
*type
, enum type_code type_code
,
3336 struct objfile
*objfile
)
3338 struct cleanup
*back_to
;
3339 struct field_info fi
;
3344 /* When describing struct/union/class types in stabs, G++ always drops
3345 all qualifications from the name. So if you've got:
3346 struct A { ... struct B { ... }; ... };
3347 then G++ will emit stabs for `struct A::B' that call it simply
3348 `struct B'. Obviously, if you've got a real top-level definition for
3349 `struct B', or other nested definitions, this is going to cause
3352 Obviously, GDB can't fix this by itself, but it can at least avoid
3353 scribbling on existing structure type objects when new definitions
3355 if (! (TYPE_CODE (type
) == TYPE_CODE_UNDEF
3356 || TYPE_STUB (type
)))
3358 complain_about_struct_wipeout (type
);
3360 /* It's probably best to return the type unchanged. */
3364 back_to
= make_cleanup (null_cleanup
, 0);
3366 INIT_CPLUS_SPECIFIC (type
);
3367 TYPE_CODE (type
) = type_code
;
3368 TYPE_FLAGS (type
) &= ~TYPE_FLAG_STUB
;
3370 /* First comes the total size in bytes. */
3374 TYPE_LENGTH (type
) = read_huge_number (pp
, 0, &nbits
, 0);
3376 return error_type (pp
, objfile
);
3379 /* Now read the baseclasses, if any, read the regular C struct or C++
3380 class member fields, attach the fields to the type, read the C++
3381 member functions, attach them to the type, and then read any tilde
3382 field (baseclass specifier for the class holding the main vtable). */
3384 if (!read_baseclasses (&fi
, pp
, type
, objfile
)
3385 || !read_struct_fields (&fi
, pp
, type
, objfile
)
3386 || !attach_fields_to_type (&fi
, type
, objfile
)
3387 || !read_member_functions (&fi
, pp
, type
, objfile
)
3388 || !attach_fn_fields_to_type (&fi
, type
)
3389 || !read_tilde_fields (&fi
, pp
, type
, objfile
))
3391 type
= error_type (pp
, objfile
);
3394 do_cleanups (back_to
);
3398 /* Read a definition of an array type,
3399 and create and return a suitable type object.
3400 Also creates a range type which represents the bounds of that
3403 static struct type
*
3404 read_array_type (char **pp
, struct type
*type
,
3405 struct objfile
*objfile
)
3407 struct type
*index_type
, *element_type
, *range_type
;
3412 /* Format of an array type:
3413 "ar<index type>;lower;upper;<array_contents_type>".
3414 OS9000: "arlower,upper;<array_contents_type>".
3416 Fortran adjustable arrays use Adigits or Tdigits for lower or upper;
3417 for these, produce a type like float[][]. */
3420 index_type
= read_type (pp
, objfile
);
3422 /* Improper format of array type decl. */
3423 return error_type (pp
, objfile
);
3427 if (!(**pp
>= '0' && **pp
<= '9') && **pp
!= '-')
3432 lower
= read_huge_number (pp
, ';', &nbits
, 0);
3435 return error_type (pp
, objfile
);
3437 if (!(**pp
>= '0' && **pp
<= '9') && **pp
!= '-')
3442 upper
= read_huge_number (pp
, ';', &nbits
, 0);
3444 return error_type (pp
, objfile
);
3446 element_type
= read_type (pp
, objfile
);
3455 create_range_type ((struct type
*) NULL
, index_type
, lower
, upper
);
3456 type
= create_array_type (type
, element_type
, range_type
);
3462 /* Read a definition of an enumeration type,
3463 and create and return a suitable type object.
3464 Also defines the symbols that represent the values of the type. */
3466 static struct type
*
3467 read_enum_type (char **pp
, struct type
*type
,
3468 struct objfile
*objfile
)
3475 struct pending
**symlist
;
3476 struct pending
*osyms
, *syms
;
3479 int unsigned_enum
= 1;
3482 /* FIXME! The stabs produced by Sun CC merrily define things that ought
3483 to be file-scope, between N_FN entries, using N_LSYM. What's a mother
3484 to do? For now, force all enum values to file scope. */
3485 if (within_function
)
3486 symlist
= &local_symbols
;
3489 symlist
= &file_symbols
;
3491 o_nsyms
= osyms
? osyms
->nsyms
: 0;
3493 /* The aix4 compiler emits an extra field before the enum members;
3494 my guess is it's a type of some sort. Just ignore it. */
3497 /* Skip over the type. */
3501 /* Skip over the colon. */
3505 /* Read the value-names and their values.
3506 The input syntax is NAME:VALUE,NAME:VALUE, and so on.
3507 A semicolon or comma instead of a NAME means the end. */
3508 while (**pp
&& **pp
!= ';' && **pp
!= ',')
3510 STABS_CONTINUE (pp
, objfile
);
3514 name
= obsavestring (*pp
, p
- *pp
, &objfile
->objfile_obstack
);
3516 n
= read_huge_number (pp
, ',', &nbits
, 0);
3518 return error_type (pp
, objfile
);
3520 sym
= (struct symbol
*)
3521 obstack_alloc (&objfile
->objfile_obstack
, sizeof (struct symbol
));
3522 memset (sym
, 0, sizeof (struct symbol
));
3523 DEPRECATED_SYMBOL_NAME (sym
) = name
;
3524 SYMBOL_LANGUAGE (sym
) = current_subfile
->language
;
3525 SYMBOL_CLASS (sym
) = LOC_CONST
;
3526 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
3527 SYMBOL_VALUE (sym
) = n
;
3530 add_symbol_to_list (sym
, symlist
);
3535 (*pp
)++; /* Skip the semicolon. */
3537 /* Now fill in the fields of the type-structure. */
3539 TYPE_LENGTH (type
) = gdbarch_int_bit (current_gdbarch
) / HOST_CHAR_BIT
;
3540 TYPE_CODE (type
) = TYPE_CODE_ENUM
;
3541 TYPE_FLAGS (type
) &= ~TYPE_FLAG_STUB
;
3543 TYPE_FLAGS (type
) |= TYPE_FLAG_UNSIGNED
;
3544 TYPE_NFIELDS (type
) = nsyms
;
3545 TYPE_FIELDS (type
) = (struct field
*)
3546 TYPE_ALLOC (type
, sizeof (struct field
) * nsyms
);
3547 memset (TYPE_FIELDS (type
), 0, sizeof (struct field
) * nsyms
);
3549 /* Find the symbols for the values and put them into the type.
3550 The symbols can be found in the symlist that we put them on
3551 to cause them to be defined. osyms contains the old value
3552 of that symlist; everything up to there was defined by us. */
3553 /* Note that we preserve the order of the enum constants, so
3554 that in something like "enum {FOO, LAST_THING=FOO}" we print
3555 FOO, not LAST_THING. */
3557 for (syms
= *symlist
, n
= nsyms
- 1; syms
; syms
= syms
->next
)
3559 int last
= syms
== osyms
? o_nsyms
: 0;
3560 int j
= syms
->nsyms
;
3561 for (; --j
>= last
; --n
)
3563 struct symbol
*xsym
= syms
->symbol
[j
];
3564 SYMBOL_TYPE (xsym
) = type
;
3565 TYPE_FIELD_NAME (type
, n
) = DEPRECATED_SYMBOL_NAME (xsym
);
3566 TYPE_FIELD_BITPOS (type
, n
) = SYMBOL_VALUE (xsym
);
3567 TYPE_FIELD_BITSIZE (type
, n
) = 0;
3576 /* Sun's ACC uses a somewhat saner method for specifying the builtin
3577 typedefs in every file (for int, long, etc):
3579 type = b <signed> <width> <format type>; <offset>; <nbits>
3581 optional format type = c or b for char or boolean.
3582 offset = offset from high order bit to start bit of type.
3583 width is # bytes in object of this type, nbits is # bits in type.
3585 The width/offset stuff appears to be for small objects stored in
3586 larger ones (e.g. `shorts' in `int' registers). We ignore it for now,
3589 static struct type
*
3590 read_sun_builtin_type (char **pp
, int typenums
[2], struct objfile
*objfile
)
3595 enum type_code code
= TYPE_CODE_INT
;
3606 return error_type (pp
, objfile
);
3610 /* For some odd reason, all forms of char put a c here. This is strange
3611 because no other type has this honor. We can safely ignore this because
3612 we actually determine 'char'acterness by the number of bits specified in
3614 Boolean forms, e.g Fortran logical*X, put a b here. */
3618 else if (**pp
== 'b')
3620 code
= TYPE_CODE_BOOL
;
3624 /* The first number appears to be the number of bytes occupied
3625 by this type, except that unsigned short is 4 instead of 2.
3626 Since this information is redundant with the third number,
3627 we will ignore it. */
3628 read_huge_number (pp
, ';', &nbits
, 0);
3630 return error_type (pp
, objfile
);
3632 /* The second number is always 0, so ignore it too. */
3633 read_huge_number (pp
, ';', &nbits
, 0);
3635 return error_type (pp
, objfile
);
3637 /* The third number is the number of bits for this type. */
3638 type_bits
= read_huge_number (pp
, 0, &nbits
, 0);
3640 return error_type (pp
, objfile
);
3641 /* The type *should* end with a semicolon. If it are embedded
3642 in a larger type the semicolon may be the only way to know where
3643 the type ends. If this type is at the end of the stabstring we
3644 can deal with the omitted semicolon (but we don't have to like
3645 it). Don't bother to complain(), Sun's compiler omits the semicolon
3651 return init_type (TYPE_CODE_VOID
, 1,
3652 signed_type
? 0 : TYPE_FLAG_UNSIGNED
, (char *) NULL
,
3655 return init_type (code
,
3656 type_bits
/ TARGET_CHAR_BIT
,
3657 signed_type
? 0 : TYPE_FLAG_UNSIGNED
, (char *) NULL
,
3661 static struct type
*
3662 read_sun_floating_type (char **pp
, int typenums
[2], struct objfile
*objfile
)
3667 struct type
*rettype
;
3669 /* The first number has more details about the type, for example
3671 details
= read_huge_number (pp
, ';', &nbits
, 0);
3673 return error_type (pp
, objfile
);
3675 /* The second number is the number of bytes occupied by this type */
3676 nbytes
= read_huge_number (pp
, ';', &nbits
, 0);
3678 return error_type (pp
, objfile
);
3680 if (details
== NF_COMPLEX
|| details
== NF_COMPLEX16
3681 || details
== NF_COMPLEX32
)
3683 rettype
= init_type (TYPE_CODE_COMPLEX
, nbytes
, 0, NULL
, objfile
);
3684 TYPE_TARGET_TYPE (rettype
)
3685 = init_type (TYPE_CODE_FLT
, nbytes
/ 2, 0, NULL
, objfile
);
3689 return init_type (TYPE_CODE_FLT
, nbytes
, 0, NULL
, objfile
);
3692 /* Read a number from the string pointed to by *PP.
3693 The value of *PP is advanced over the number.
3694 If END is nonzero, the character that ends the
3695 number must match END, or an error happens;
3696 and that character is skipped if it does match.
3697 If END is zero, *PP is left pointing to that character.
3699 If TWOS_COMPLEMENT_BITS is set to a strictly positive value and if
3700 the number is represented in an octal representation, assume that
3701 it is represented in a 2's complement representation with a size of
3702 TWOS_COMPLEMENT_BITS.
3704 If the number fits in a long, set *BITS to 0 and return the value.
3705 If not, set *BITS to be the number of bits in the number and return 0.
3707 If encounter garbage, set *BITS to -1 and return 0. */
3710 read_huge_number (char **pp
, int end
, int *bits
, int twos_complement_bits
)
3722 int twos_complement_representation
= radix
== 8 && twos_complement_bits
> 0;
3730 /* Leading zero means octal. GCC uses this to output values larger
3731 than an int (because that would be hard in decimal). */
3738 upper_limit
= LONG_MAX
/ radix
;
3740 while ((c
= *p
++) >= '0' && c
< ('0' + radix
))
3742 if (n
<= upper_limit
)
3744 if (twos_complement_representation
)
3746 /* Octal, signed, twos complement representation. In this case,
3747 sn is the signed value, n is the corresponding absolute
3748 value. signed_bit is the position of the sign bit in the
3749 first three bits. */
3752 sign_bit
= (twos_complement_bits
% 3 + 2) % 3;
3753 sn
= c
- '0' - ((2 * (c
- '0')) | (2 << sign_bit
));
3766 /* unsigned representation */
3768 n
+= c
- '0'; /* FIXME this overflows anyway */
3774 /* This depends on large values being output in octal, which is
3781 /* Ignore leading zeroes. */
3785 else if (c
== '2' || c
== '3')
3811 /* Large decimal constants are an error (because it is hard to
3812 count how many bits are in them). */
3818 /* -0x7f is the same as 0x80. So deal with it by adding one to
3819 the number of bits. */
3829 if (twos_complement_representation
)
3834 /* It's *BITS which has the interesting information. */
3838 static struct type
*
3839 read_range_type (char **pp
, int typenums
[2], int type_size
,
3840 struct objfile
*objfile
)
3842 char *orig_pp
= *pp
;
3847 struct type
*result_type
;
3848 struct type
*index_type
= NULL
;
3850 /* First comes a type we are a subrange of.
3851 In C it is usually 0, 1 or the type being defined. */
3852 if (read_type_number (pp
, rangenums
) != 0)
3853 return error_type (pp
, objfile
);
3854 self_subrange
= (rangenums
[0] == typenums
[0] &&
3855 rangenums
[1] == typenums
[1]);
3860 index_type
= read_type (pp
, objfile
);
3863 /* A semicolon should now follow; skip it. */
3867 /* The remaining two operands are usually lower and upper bounds
3868 of the range. But in some special cases they mean something else. */
3869 n2
= read_huge_number (pp
, ';', &n2bits
, type_size
);
3870 n3
= read_huge_number (pp
, ';', &n3bits
, type_size
);
3872 if (n2bits
== -1 || n3bits
== -1)
3873 return error_type (pp
, objfile
);
3876 goto handle_true_range
;
3878 /* If limits are huge, must be large integral type. */
3879 if (n2bits
!= 0 || n3bits
!= 0)
3881 char got_signed
= 0;
3882 char got_unsigned
= 0;
3883 /* Number of bits in the type. */
3886 /* If a type size attribute has been specified, the bounds of
3887 the range should fit in this size. If the lower bounds needs
3888 more bits than the upper bound, then the type is signed. */
3889 if (n2bits
<= type_size
&& n3bits
<= type_size
)
3891 if (n2bits
== type_size
&& n2bits
> n3bits
)
3897 /* Range from 0 to <large number> is an unsigned large integral type. */
3898 else if ((n2bits
== 0 && n2
== 0) && n3bits
!= 0)
3903 /* Range from <large number> to <large number>-1 is a large signed
3904 integral type. Take care of the case where <large number> doesn't
3905 fit in a long but <large number>-1 does. */
3906 else if ((n2bits
!= 0 && n3bits
!= 0 && n2bits
== n3bits
+ 1)
3907 || (n2bits
!= 0 && n3bits
== 0
3908 && (n2bits
== sizeof (long) * HOST_CHAR_BIT
)
3915 if (got_signed
|| got_unsigned
)
3917 return init_type (TYPE_CODE_INT
, nbits
/ TARGET_CHAR_BIT
,
3918 got_unsigned
? TYPE_FLAG_UNSIGNED
: 0, NULL
,
3922 return error_type (pp
, objfile
);
3925 /* A type defined as a subrange of itself, with bounds both 0, is void. */
3926 if (self_subrange
&& n2
== 0 && n3
== 0)
3927 return init_type (TYPE_CODE_VOID
, 1, 0, NULL
, objfile
);
3929 /* If n3 is zero and n2 is positive, we want a floating type, and n2
3930 is the width in bytes.
3932 Fortran programs appear to use this for complex types also. To
3933 distinguish between floats and complex, g77 (and others?) seem
3934 to use self-subranges for the complexes, and subranges of int for
3937 Also note that for complexes, g77 sets n2 to the size of one of
3938 the member floats, not the whole complex beast. My guess is that
3939 this was to work well with pre-COMPLEX versions of gdb. */
3941 if (n3
== 0 && n2
> 0)
3943 struct type
*float_type
3944 = init_type (TYPE_CODE_FLT
, n2
, 0, NULL
, objfile
);
3948 struct type
*complex_type
=
3949 init_type (TYPE_CODE_COMPLEX
, 2 * n2
, 0, NULL
, objfile
);
3950 TYPE_TARGET_TYPE (complex_type
) = float_type
;
3951 return complex_type
;
3957 /* If the upper bound is -1, it must really be an unsigned int. */
3959 else if (n2
== 0 && n3
== -1)
3961 /* It is unsigned int or unsigned long. */
3962 /* GCC 2.3.3 uses this for long long too, but that is just a GDB 3.5
3963 compatibility hack. */
3964 return init_type (TYPE_CODE_INT
,
3965 gdbarch_int_bit (current_gdbarch
) / TARGET_CHAR_BIT
,
3966 TYPE_FLAG_UNSIGNED
, NULL
, objfile
);
3969 /* Special case: char is defined (Who knows why) as a subrange of
3970 itself with range 0-127. */
3971 else if (self_subrange
&& n2
== 0 && n3
== 127)
3972 return init_type (TYPE_CODE_INT
, 1, TYPE_FLAG_NOSIGN
, NULL
, objfile
);
3974 /* We used to do this only for subrange of self or subrange of int. */
3977 /* -1 is used for the upper bound of (4 byte) "unsigned int" and
3978 "unsigned long", and we already checked for that,
3979 so don't need to test for it here. */
3982 /* n3 actually gives the size. */
3983 return init_type (TYPE_CODE_INT
, -n3
, TYPE_FLAG_UNSIGNED
,
3986 /* Is n3 == 2**(8n)-1 for some integer n? Then it's an
3987 unsigned n-byte integer. But do require n to be a power of
3988 two; we don't want 3- and 5-byte integers flying around. */
3994 for (bytes
= 0; (bits
& 0xff) == 0xff; bytes
++)
3997 && ((bytes
- 1) & bytes
) == 0) /* "bytes is a power of two" */
3998 return init_type (TYPE_CODE_INT
, bytes
, TYPE_FLAG_UNSIGNED
, NULL
,
4002 /* I think this is for Convex "long long". Since I don't know whether
4003 Convex sets self_subrange, I also accept that particular size regardless
4004 of self_subrange. */
4005 else if (n3
== 0 && n2
< 0
4007 || n2
== -gdbarch_long_long_bit
4008 (current_gdbarch
) / TARGET_CHAR_BIT
))
4009 return init_type (TYPE_CODE_INT
, -n2
, 0, NULL
, objfile
);
4010 else if (n2
== -n3
- 1)
4013 return init_type (TYPE_CODE_INT
, 1, 0, NULL
, objfile
);
4015 return init_type (TYPE_CODE_INT
, 2, 0, NULL
, objfile
);
4016 if (n3
== 0x7fffffff)
4017 return init_type (TYPE_CODE_INT
, 4, 0, NULL
, objfile
);
4020 /* We have a real range type on our hands. Allocate space and
4021 return a real pointer. */
4025 index_type
= builtin_type_int
;
4027 index_type
= *dbx_lookup_type (rangenums
);
4028 if (index_type
== NULL
)
4030 /* Does this actually ever happen? Is that why we are worrying
4031 about dealing with it rather than just calling error_type? */
4033 static struct type
*range_type_index
;
4035 complaint (&symfile_complaints
,
4036 _("base type %d of range type is not defined"), rangenums
[1]);
4037 if (range_type_index
== NULL
)
4039 init_type (TYPE_CODE_INT
,
4040 gdbarch_int_bit (current_gdbarch
) / TARGET_CHAR_BIT
,
4041 0, "range type index type", NULL
);
4042 index_type
= range_type_index
;
4045 result_type
= create_range_type ((struct type
*) NULL
, index_type
, n2
, n3
);
4046 return (result_type
);
4049 /* Read in an argument list. This is a list of types, separated by commas
4050 and terminated with END. Return the list of types read in, or NULL
4051 if there is an error. */
4053 static struct field
*
4054 read_args (char **pp
, int end
, struct objfile
*objfile
, int *nargsp
,
4057 /* FIXME! Remove this arbitrary limit! */
4058 struct type
*types
[1024]; /* allow for fns of 1023 parameters */
4065 /* Invalid argument list: no ','. */
4068 STABS_CONTINUE (pp
, objfile
);
4069 types
[n
++] = read_type (pp
, objfile
);
4071 (*pp
)++; /* get past `end' (the ':' character) */
4073 if (TYPE_CODE (types
[n
- 1]) != TYPE_CODE_VOID
)
4081 rval
= (struct field
*) xmalloc (n
* sizeof (struct field
));
4082 memset (rval
, 0, n
* sizeof (struct field
));
4083 for (i
= 0; i
< n
; i
++)
4084 rval
[i
].type
= types
[i
];
4089 /* Common block handling. */
4091 /* List of symbols declared since the last BCOMM. This list is a tail
4092 of local_symbols. When ECOMM is seen, the symbols on the list
4093 are noted so their proper addresses can be filled in later,
4094 using the common block base address gotten from the assembler
4097 static struct pending
*common_block
;
4098 static int common_block_i
;
4100 /* Name of the current common block. We get it from the BCOMM instead of the
4101 ECOMM to match IBM documentation (even though IBM puts the name both places
4102 like everyone else). */
4103 static char *common_block_name
;
4105 /* Process a N_BCOMM symbol. The storage for NAME is not guaranteed
4106 to remain after this function returns. */
4109 common_block_start (char *name
, struct objfile
*objfile
)
4111 if (common_block_name
!= NULL
)
4113 complaint (&symfile_complaints
,
4114 _("Invalid symbol data: common block within common block"));
4116 common_block
= local_symbols
;
4117 common_block_i
= local_symbols
? local_symbols
->nsyms
: 0;
4118 common_block_name
= obsavestring (name
, strlen (name
),
4119 &objfile
->objfile_obstack
);
4122 /* Process a N_ECOMM symbol. */
4125 common_block_end (struct objfile
*objfile
)
4127 /* Symbols declared since the BCOMM are to have the common block
4128 start address added in when we know it. common_block and
4129 common_block_i point to the first symbol after the BCOMM in
4130 the local_symbols list; copy the list and hang it off the
4131 symbol for the common block name for later fixup. */
4134 struct pending
*new = 0;
4135 struct pending
*next
;
4138 if (common_block_name
== NULL
)
4140 complaint (&symfile_complaints
, _("ECOMM symbol unmatched by BCOMM"));
4144 sym
= (struct symbol
*)
4145 obstack_alloc (&objfile
->objfile_obstack
, sizeof (struct symbol
));
4146 memset (sym
, 0, sizeof (struct symbol
));
4147 /* Note: common_block_name already saved on objfile_obstack */
4148 DEPRECATED_SYMBOL_NAME (sym
) = common_block_name
;
4149 SYMBOL_CLASS (sym
) = LOC_BLOCK
;
4151 /* Now we copy all the symbols which have been defined since the BCOMM. */
4153 /* Copy all the struct pendings before common_block. */
4154 for (next
= local_symbols
;
4155 next
!= NULL
&& next
!= common_block
;
4158 for (j
= 0; j
< next
->nsyms
; j
++)
4159 add_symbol_to_list (next
->symbol
[j
], &new);
4162 /* Copy however much of COMMON_BLOCK we need. If COMMON_BLOCK is
4163 NULL, it means copy all the local symbols (which we already did
4166 if (common_block
!= NULL
)
4167 for (j
= common_block_i
; j
< common_block
->nsyms
; j
++)
4168 add_symbol_to_list (common_block
->symbol
[j
], &new);
4170 SYMBOL_TYPE (sym
) = (struct type
*) new;
4172 /* Should we be putting local_symbols back to what it was?
4175 i
= hashname (DEPRECATED_SYMBOL_NAME (sym
));
4176 SYMBOL_VALUE_CHAIN (sym
) = global_sym_chain
[i
];
4177 global_sym_chain
[i
] = sym
;
4178 common_block_name
= NULL
;
4181 /* Add a common block's start address to the offset of each symbol
4182 declared to be in it (by being between a BCOMM/ECOMM pair that uses
4183 the common block name). */
4186 fix_common_block (struct symbol
*sym
, int valu
)
4188 struct pending
*next
= (struct pending
*) SYMBOL_TYPE (sym
);
4189 for (; next
; next
= next
->next
)
4192 for (j
= next
->nsyms
- 1; j
>= 0; j
--)
4193 SYMBOL_VALUE_ADDRESS (next
->symbol
[j
]) += valu
;
4199 /* Add {TYPE, TYPENUMS} to the NONAME_UNDEFS vector.
4200 See add_undefined_type for more details. */
4203 add_undefined_type_noname (struct type
*type
, int typenums
[2])
4207 nat
.typenums
[0] = typenums
[0];
4208 nat
.typenums
[1] = typenums
[1];
4211 if (noname_undefs_length
== noname_undefs_allocated
)
4213 noname_undefs_allocated
*= 2;
4214 noname_undefs
= (struct nat
*)
4215 xrealloc ((char *) noname_undefs
,
4216 noname_undefs_allocated
* sizeof (struct nat
));
4218 noname_undefs
[noname_undefs_length
++] = nat
;
4221 /* Add TYPE to the UNDEF_TYPES vector.
4222 See add_undefined_type for more details. */
4225 add_undefined_type_1 (struct type
*type
)
4227 if (undef_types_length
== undef_types_allocated
)
4229 undef_types_allocated
*= 2;
4230 undef_types
= (struct type
**)
4231 xrealloc ((char *) undef_types
,
4232 undef_types_allocated
* sizeof (struct type
*));
4234 undef_types
[undef_types_length
++] = type
;
4237 /* What about types defined as forward references inside of a small lexical
4239 /* Add a type to the list of undefined types to be checked through
4240 once this file has been read in.
4242 In practice, we actually maintain two such lists: The first list
4243 (UNDEF_TYPES) is used for types whose name has been provided, and
4244 concerns forward references (eg 'xs' or 'xu' forward references);
4245 the second list (NONAME_UNDEFS) is used for types whose name is
4246 unknown at creation time, because they were referenced through
4247 their type number before the actual type was declared.
4248 This function actually adds the given type to the proper list. */
4251 add_undefined_type (struct type
*type
, int typenums
[2])
4253 if (TYPE_TAG_NAME (type
) == NULL
)
4254 add_undefined_type_noname (type
, typenums
);
4256 add_undefined_type_1 (type
);
4259 /* Try to fix all undefined types pushed on the UNDEF_TYPES vector. */
4262 cleanup_undefined_types_noname (void)
4266 for (i
= 0; i
< noname_undefs_length
; i
++)
4268 struct nat nat
= noname_undefs
[i
];
4271 type
= dbx_lookup_type (nat
.typenums
);
4272 if (nat
.type
!= *type
&& TYPE_CODE (*type
) != TYPE_CODE_UNDEF
)
4273 replace_type (nat
.type
, *type
);
4276 noname_undefs_length
= 0;
4279 /* Go through each undefined type, see if it's still undefined, and fix it
4280 up if possible. We have two kinds of undefined types:
4282 TYPE_CODE_ARRAY: Array whose target type wasn't defined yet.
4283 Fix: update array length using the element bounds
4284 and the target type's length.
4285 TYPE_CODE_STRUCT, TYPE_CODE_UNION: Structure whose fields were not
4286 yet defined at the time a pointer to it was made.
4287 Fix: Do a full lookup on the struct/union tag. */
4290 cleanup_undefined_types_1 (void)
4294 for (type
= undef_types
; type
< undef_types
+ undef_types_length
; type
++)
4296 switch (TYPE_CODE (*type
))
4299 case TYPE_CODE_STRUCT
:
4300 case TYPE_CODE_UNION
:
4301 case TYPE_CODE_ENUM
:
4303 /* Check if it has been defined since. Need to do this here
4304 as well as in check_typedef to deal with the (legitimate in
4305 C though not C++) case of several types with the same name
4306 in different source files. */
4307 if (TYPE_STUB (*type
))
4309 struct pending
*ppt
;
4311 /* Name of the type, without "struct" or "union" */
4312 char *typename
= TYPE_TAG_NAME (*type
);
4314 if (typename
== NULL
)
4316 complaint (&symfile_complaints
, _("need a type name"));
4319 for (ppt
= file_symbols
; ppt
; ppt
= ppt
->next
)
4321 for (i
= 0; i
< ppt
->nsyms
; i
++)
4323 struct symbol
*sym
= ppt
->symbol
[i
];
4325 if (SYMBOL_CLASS (sym
) == LOC_TYPEDEF
4326 && SYMBOL_DOMAIN (sym
) == STRUCT_DOMAIN
4327 && (TYPE_CODE (SYMBOL_TYPE (sym
)) ==
4329 && strcmp (DEPRECATED_SYMBOL_NAME (sym
), typename
) == 0)
4330 replace_type (*type
, SYMBOL_TYPE (sym
));
4339 complaint (&symfile_complaints
,
4340 _("forward-referenced types left unresolved, "
4348 undef_types_length
= 0;
4351 /* Try to fix all the undefined types we ecountered while processing
4355 cleanup_undefined_types (void)
4357 cleanup_undefined_types_1 ();
4358 cleanup_undefined_types_noname ();
4361 /* Scan through all of the global symbols defined in the object file,
4362 assigning values to the debugging symbols that need to be assigned
4363 to. Get these symbols from the minimal symbol table. */
4366 scan_file_globals (struct objfile
*objfile
)
4369 struct minimal_symbol
*msymbol
;
4370 struct symbol
*sym
, *prev
;
4371 struct objfile
*resolve_objfile
;
4373 /* SVR4 based linkers copy referenced global symbols from shared
4374 libraries to the main executable.
4375 If we are scanning the symbols for a shared library, try to resolve
4376 them from the minimal symbols of the main executable first. */
4378 if (symfile_objfile
&& objfile
!= symfile_objfile
)
4379 resolve_objfile
= symfile_objfile
;
4381 resolve_objfile
= objfile
;
4385 /* Avoid expensive loop through all minimal symbols if there are
4386 no unresolved symbols. */
4387 for (hash
= 0; hash
< HASHSIZE
; hash
++)
4389 if (global_sym_chain
[hash
])
4392 if (hash
>= HASHSIZE
)
4395 for (msymbol
= resolve_objfile
->msymbols
;
4396 msymbol
&& DEPRECATED_SYMBOL_NAME (msymbol
) != NULL
;
4401 /* Skip static symbols. */
4402 switch (MSYMBOL_TYPE (msymbol
))
4414 /* Get the hash index and check all the symbols
4415 under that hash index. */
4417 hash
= hashname (DEPRECATED_SYMBOL_NAME (msymbol
));
4419 for (sym
= global_sym_chain
[hash
]; sym
;)
4421 if (DEPRECATED_SYMBOL_NAME (msymbol
)[0] == DEPRECATED_SYMBOL_NAME (sym
)[0] &&
4422 strcmp (DEPRECATED_SYMBOL_NAME (msymbol
) + 1, DEPRECATED_SYMBOL_NAME (sym
) + 1) == 0)
4424 /* Splice this symbol out of the hash chain and
4425 assign the value we have to it. */
4428 SYMBOL_VALUE_CHAIN (prev
) = SYMBOL_VALUE_CHAIN (sym
);
4432 global_sym_chain
[hash
] = SYMBOL_VALUE_CHAIN (sym
);
4435 /* Check to see whether we need to fix up a common block. */
4436 /* Note: this code might be executed several times for
4437 the same symbol if there are multiple references. */
4440 if (SYMBOL_CLASS (sym
) == LOC_BLOCK
)
4442 fix_common_block (sym
,
4443 SYMBOL_VALUE_ADDRESS (msymbol
));
4447 SYMBOL_VALUE_ADDRESS (sym
)
4448 = SYMBOL_VALUE_ADDRESS (msymbol
);
4450 SYMBOL_SECTION (sym
) = SYMBOL_SECTION (msymbol
);
4455 sym
= SYMBOL_VALUE_CHAIN (prev
);
4459 sym
= global_sym_chain
[hash
];
4465 sym
= SYMBOL_VALUE_CHAIN (sym
);
4469 if (resolve_objfile
== objfile
)
4471 resolve_objfile
= objfile
;
4474 /* Change the storage class of any remaining unresolved globals to
4475 LOC_UNRESOLVED and remove them from the chain. */
4476 for (hash
= 0; hash
< HASHSIZE
; hash
++)
4478 sym
= global_sym_chain
[hash
];
4482 sym
= SYMBOL_VALUE_CHAIN (sym
);
4484 /* Change the symbol address from the misleading chain value
4486 SYMBOL_VALUE_ADDRESS (prev
) = 0;
4488 /* Complain about unresolved common block symbols. */
4489 if (SYMBOL_CLASS (prev
) == LOC_STATIC
)
4490 SYMBOL_CLASS (prev
) = LOC_UNRESOLVED
;
4492 complaint (&symfile_complaints
,
4493 _("%s: common block `%s' from global_sym_chain unresolved"),
4494 objfile
->name
, DEPRECATED_SYMBOL_NAME (prev
));
4497 memset (global_sym_chain
, 0, sizeof (global_sym_chain
));
4500 /* Initialize anything that needs initializing when starting to read
4501 a fresh piece of a symbol file, e.g. reading in the stuff corresponding
4505 stabsread_init (void)
4509 /* Initialize anything that needs initializing when a completely new
4510 symbol file is specified (not just adding some symbols from another
4511 file, e.g. a shared library). */
4514 stabsread_new_init (void)
4516 /* Empty the hash table of global syms looking for values. */
4517 memset (global_sym_chain
, 0, sizeof (global_sym_chain
));
4520 /* Initialize anything that needs initializing at the same time as
4521 start_symtab() is called. */
4526 global_stabs
= NULL
; /* AIX COFF */
4527 /* Leave FILENUM of 0 free for builtin types and this file's types. */
4528 n_this_object_header_files
= 1;
4529 type_vector_length
= 0;
4530 type_vector
= (struct type
**) 0;
4532 /* FIXME: If common_block_name is not already NULL, we should complain(). */
4533 common_block_name
= NULL
;
4536 /* Call after end_symtab() */
4543 xfree (type_vector
);
4546 type_vector_length
= 0;
4547 previous_stab_code
= 0;
4551 finish_global_stabs (struct objfile
*objfile
)
4555 patch_block_stabs (global_symbols
, global_stabs
, objfile
);
4556 xfree (global_stabs
);
4557 global_stabs
= NULL
;
4561 /* Find the end of the name, delimited by a ':', but don't match
4562 ObjC symbols which look like -[Foo bar::]:bla. */
4564 find_name_end (char *name
)
4567 if (s
[0] == '-' || *s
== '+')
4569 /* Must be an ObjC method symbol. */
4572 error (_("invalid symbol name \"%s\""), name
);
4574 s
= strchr (s
, ']');
4577 error (_("invalid symbol name \"%s\""), name
);
4579 return strchr (s
, ':');
4583 return strchr (s
, ':');
4587 /* Initializer for this module */
4590 _initialize_stabsread (void)
4592 undef_types_allocated
= 20;
4593 undef_types_length
= 0;
4594 undef_types
= (struct type
**)
4595 xmalloc (undef_types_allocated
* sizeof (struct type
*));
4597 noname_undefs_allocated
= 20;
4598 noname_undefs_length
= 0;
4599 noname_undefs
= (struct nat
*)
4600 xmalloc (noname_undefs_allocated
* sizeof (struct nat
));