1 /* Support routines for decoding "stabs" debugging information format.
2 Copyright 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995,
3 1996, 1997, 1998, 1999, 2000, 2001, 2002
4 Free Software Foundation, Inc.
6 This file is part of GDB.
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 59 Temple Place - Suite 330,
21 Boston, MA 02111-1307, USA. */
23 /* Support routines for reading and decoding debugging information in
24 the "stabs" format. This format is used with many systems that use
25 the a.out object file format, as well as some systems that use
26 COFF or ELF where the stabs data is placed in a special section.
27 Avoid placing any object file format specific code in this file. */
30 #include "gdb_string.h"
32 #include "gdb_obstack.h"
35 #include "expression.h"
38 #include "aout/stab_gnu.h" /* We always use GNU stabs, not native */
40 #include "aout/aout64.h"
41 #include "gdb-stabs.h"
43 #include "complaints.h"
48 #include "cp-support.h"
52 /* Ask stabsread.h to define the vars it normally declares `extern'. */
55 #include "stabsread.h" /* Our own declarations */
58 extern void _initialize_stabsread (void);
60 /* The routines that read and process a complete stabs for a C struct or
61 C++ class pass lists of data member fields and lists of member function
62 fields in an instance of a field_info structure, as defined below.
63 This is part of some reorganization of low level C++ support and is
64 expected to eventually go away... (FIXME) */
70 struct nextfield *next;
72 /* This is the raw visibility from the stab. It is not checked
73 for being one of the visibilities we recognize, so code which
74 examines this field better be able to deal. */
80 struct next_fnfieldlist
82 struct next_fnfieldlist *next;
83 struct fn_fieldlist fn_fieldlist;
89 read_one_struct_field (struct field_info *, char **, char *,
90 struct type *, struct objfile *);
92 static char *get_substring (char **, int);
94 static struct type *dbx_alloc_type (int[2], struct objfile *);
96 static long read_huge_number (char **, int, int *);
98 static struct type *error_type (char **, struct objfile *);
101 patch_block_stabs (struct pending *, struct pending_stabs *,
104 static void fix_common_block (struct symbol *, int);
106 static int read_type_number (char **, int *);
108 static struct type *read_range_type (char **, int[2], struct objfile *);
110 static struct type *read_sun_builtin_type (char **, int[2], struct objfile *);
112 static struct type *read_sun_floating_type (char **, int[2],
115 static struct type *read_enum_type (char **, struct type *, struct objfile *);
117 static struct type *rs6000_builtin_type (int);
120 read_member_functions (struct field_info *, char **, struct type *,
124 read_struct_fields (struct field_info *, char **, struct type *,
128 read_baseclasses (struct field_info *, char **, struct type *,
132 read_tilde_fields (struct field_info *, char **, struct type *,
135 static int attach_fn_fields_to_type (struct field_info *, struct type *);
138 attach_fields_to_type (struct field_info *, struct type *, struct objfile *);
140 static struct type *read_struct_type (char **, struct type *,
144 static struct type *read_array_type (char **, struct type *,
147 static struct field *read_args (char **, int, struct objfile *, int *, int *);
150 read_cpp_abbrev (struct field_info *, char **, struct type *,
153 /* new functions added for cfront support */
156 copy_cfront_struct_fields (struct field_info *, struct type *,
159 static char *get_cfront_method_physname (char *);
162 read_cfront_baseclasses (struct field_info *, char **,
163 struct type *, struct objfile *);
166 read_cfront_static_fields (struct field_info *, char **,
167 struct type *, struct objfile *);
169 read_cfront_member_functions (struct field_info *, char **,
170 struct type *, struct objfile *);
172 static char *find_name_end (char *name);
174 /* end new functions added for cfront support */
177 add_live_range (struct objfile *, struct symbol *, CORE_ADDR, CORE_ADDR);
179 static int resolve_live_range (struct objfile *, struct symbol *, char *);
181 static int process_reference (char **string);
183 static CORE_ADDR ref_search_value (int refnum);
186 resolve_symbol_reference (struct objfile *, struct symbol *, char *);
188 void stabsread_clear_cache (void);
190 static const char vptr_name[] = "_vptr$";
191 static const char vb_name[] = "_vb$";
193 /* Define this as 1 if a pcc declaration of a char or short argument
194 gives the correct address. Otherwise assume pcc gives the
195 address of the corresponding int, which is not the same on a
196 big-endian machine. */
198 #if !defined (BELIEVE_PCC_PROMOTION)
199 #define BELIEVE_PCC_PROMOTION 0
201 #if !defined (BELIEVE_PCC_PROMOTION_TYPE)
202 #define BELIEVE_PCC_PROMOTION_TYPE 0
206 invalid_cpp_abbrev_complaint (const char *arg1)
208 complaint (&symfile_complaints, "invalid C++ abbreviation `%s'", arg1);
212 reg_value_complaint (int arg1, int arg2, const char *arg3)
214 complaint (&symfile_complaints,
215 "register number %d too large (max %d) in symbol %s", arg1, arg2,
220 stabs_general_complaint (const char *arg1)
222 complaint (&symfile_complaints, "%s", arg1);
226 lrs_general_complaint (const char *arg1)
228 complaint (&symfile_complaints, "%s", arg1);
231 /* Make a list of forward references which haven't been defined. */
233 static struct type **undef_types;
234 static int undef_types_allocated;
235 static int undef_types_length;
236 static struct symbol *current_symbol = NULL;
238 /* Check for and handle cretinous stabs symbol name continuation! */
239 #define STABS_CONTINUE(pp,objfile) \
241 if (**(pp) == '\\' || (**(pp) == '?' && (*(pp))[1] == '\0')) \
242 *(pp) = next_symbol_text (objfile); \
246 /* Look up a dbx type-number pair. Return the address of the slot
247 where the type for that number-pair is stored.
248 The number-pair is in TYPENUMS.
250 This can be used for finding the type associated with that pair
251 or for associating a new type with the pair. */
254 dbx_lookup_type (int typenums[2])
256 register int filenum = typenums[0];
257 register int index = typenums[1];
259 register int real_filenum;
260 register struct header_file *f;
263 if (filenum == -1) /* -1,-1 is for temporary types. */
266 if (filenum < 0 || filenum >= n_this_object_header_files)
268 complaint (&symfile_complaints,
269 "Invalid symbol data: type number (%d,%d) out of range at symtab pos %d.",
270 filenum, index, symnum);
278 /* Caller wants address of address of type. We think
279 that negative (rs6k builtin) types will never appear as
280 "lvalues", (nor should they), so we stuff the real type
281 pointer into a temp, and return its address. If referenced,
282 this will do the right thing. */
283 static struct type *temp_type;
285 temp_type = rs6000_builtin_type (index);
289 /* Type is defined outside of header files.
290 Find it in this object file's type vector. */
291 if (index >= type_vector_length)
293 old_len = type_vector_length;
296 type_vector_length = INITIAL_TYPE_VECTOR_LENGTH;
297 type_vector = (struct type **)
298 xmalloc (type_vector_length * sizeof (struct type *));
300 while (index >= type_vector_length)
302 type_vector_length *= 2;
304 type_vector = (struct type **)
305 xrealloc ((char *) type_vector,
306 (type_vector_length * sizeof (struct type *)));
307 memset (&type_vector[old_len], 0,
308 (type_vector_length - old_len) * sizeof (struct type *));
310 return (&type_vector[index]);
314 real_filenum = this_object_header_files[filenum];
316 if (real_filenum >= N_HEADER_FILES (current_objfile))
318 struct type *temp_type;
319 struct type **temp_type_p;
321 warning ("GDB internal error: bad real_filenum");
324 temp_type = init_type (TYPE_CODE_ERROR, 0, 0, NULL, NULL);
325 temp_type_p = (struct type **) xmalloc (sizeof (struct type *));
326 *temp_type_p = temp_type;
330 f = HEADER_FILES (current_objfile) + real_filenum;
332 f_orig_length = f->length;
333 if (index >= f_orig_length)
335 while (index >= f->length)
339 f->vector = (struct type **)
340 xrealloc ((char *) f->vector, f->length * sizeof (struct type *));
341 memset (&f->vector[f_orig_length], 0,
342 (f->length - f_orig_length) * sizeof (struct type *));
344 return (&f->vector[index]);
348 /* Make sure there is a type allocated for type numbers TYPENUMS
349 and return the type object.
350 This can create an empty (zeroed) type object.
351 TYPENUMS may be (-1, -1) to return a new type object that is not
352 put into the type vector, and so may not be referred to by number. */
355 dbx_alloc_type (int typenums[2], struct objfile *objfile)
357 register struct type **type_addr;
359 if (typenums[0] == -1)
361 return (alloc_type (objfile));
364 type_addr = dbx_lookup_type (typenums);
366 /* If we are referring to a type not known at all yet,
367 allocate an empty type for it.
368 We will fill it in later if we find out how. */
371 *type_addr = alloc_type (objfile);
377 /* for all the stabs in a given stab vector, build appropriate types
378 and fix their symbols in given symbol vector. */
381 patch_block_stabs (struct pending *symbols, struct pending_stabs *stabs,
382 struct objfile *objfile)
392 /* for all the stab entries, find their corresponding symbols and
393 patch their types! */
395 for (ii = 0; ii < stabs->count; ++ii)
397 name = stabs->stab[ii];
398 pp = (char *) strchr (name, ':');
402 pp = (char *) strchr (pp, ':');
404 sym = find_symbol_in_list (symbols, name, pp - name);
407 /* FIXME-maybe: it would be nice if we noticed whether
408 the variable was defined *anywhere*, not just whether
409 it is defined in this compilation unit. But neither
410 xlc or GCC seem to need such a definition, and until
411 we do psymtabs (so that the minimal symbols from all
412 compilation units are available now), I'm not sure
413 how to get the information. */
415 /* On xcoff, if a global is defined and never referenced,
416 ld will remove it from the executable. There is then
417 a N_GSYM stab for it, but no regular (C_EXT) symbol. */
418 sym = (struct symbol *)
419 obstack_alloc (&objfile->symbol_obstack,
420 sizeof (struct symbol));
422 memset (sym, 0, sizeof (struct symbol));
423 SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE;
424 SYMBOL_CLASS (sym) = LOC_OPTIMIZED_OUT;
426 obsavestring (name, pp - name, &objfile->symbol_obstack);
428 if (*(pp - 1) == 'F' || *(pp - 1) == 'f')
430 /* I don't think the linker does this with functions,
431 so as far as I know this is never executed.
432 But it doesn't hurt to check. */
434 lookup_function_type (read_type (&pp, objfile));
438 SYMBOL_TYPE (sym) = read_type (&pp, objfile);
440 add_symbol_to_list (sym, &global_symbols);
445 if (*(pp - 1) == 'F' || *(pp - 1) == 'f')
448 lookup_function_type (read_type (&pp, objfile));
452 SYMBOL_TYPE (sym) = read_type (&pp, objfile);
460 /* Read a number by which a type is referred to in dbx data,
461 or perhaps read a pair (FILENUM, TYPENUM) in parentheses.
462 Just a single number N is equivalent to (0,N).
463 Return the two numbers by storing them in the vector TYPENUMS.
464 TYPENUMS will then be used as an argument to dbx_lookup_type.
466 Returns 0 for success, -1 for error. */
469 read_type_number (register char **pp, register int *typenums)
475 typenums[0] = read_huge_number (pp, ',', &nbits);
478 typenums[1] = read_huge_number (pp, ')', &nbits);
485 typenums[1] = read_huge_number (pp, 0, &nbits);
493 #define VISIBILITY_PRIVATE '0' /* Stabs character for private field */
494 #define VISIBILITY_PROTECTED '1' /* Stabs character for protected fld */
495 #define VISIBILITY_PUBLIC '2' /* Stabs character for public field */
496 #define VISIBILITY_IGNORE '9' /* Optimized out or zero length */
498 #define CFRONT_VISIBILITY_PRIVATE '2' /* Stabs character for private field */
499 #define CFRONT_VISIBILITY_PUBLIC '1' /* Stabs character for public field */
501 /* This code added to support parsing of ARM/Cfront stabs strings */
503 /* Get substring from string up to char c, advance string pointer past
507 get_substring (char **p, int c)
522 /* Physname gets strcat'd onto sname in order to recreate the mangled
523 name (see funtion gdb_mangle_name in gdbtypes.c). For cfront, make
524 the physname look like that of g++ - take out the initial mangling
525 eg: for sname="a" and fname="foo__1aFPFs_i" return "FPFs_i" */
528 get_cfront_method_physname (char *fname)
531 /* FIXME would like to make this generic for g++ too, but
532 that is already handled in read_member_funcctions */
535 /* search ahead to find the start of the mangled suffix */
536 if (*p == '_' && *(p + 1) == '_') /* compiler generated; probably a ctor/dtor */
538 while (p && (unsigned) ((p + 1) - fname) < strlen (fname) && *(p + 1) != '_')
540 if (!(p && *p == '_' && *(p + 1) == '_'))
541 error ("Invalid mangled function name %s", fname);
542 p += 2; /* advance past '__' */
544 /* struct name length and name of type should come next; advance past it */
547 len = len * 10 + (*p - '0');
556 msg_unknown_complaint (const char *arg1)
558 complaint (&symfile_complaints, "Unsupported token in stabs string %s", arg1);
561 /* Read base classes within cfront class definition.
562 eg: A:ZcA;1@Bpub v2@Bvirpri;__ct__1AFv func__1AFv *sfunc__1AFv ;as__1A ;;
565 A:ZcA;;foopri__1AFv foopro__1AFv __ct__1AFv __ct__1AFRC1A foopub__1AFv ;;;
570 read_cfront_baseclasses (struct field_info *fip, char **pp, struct type *type,
571 struct objfile *objfile)
576 struct nextfield *new;
578 if (**pp == ';') /* no base classes; return */
584 /* first count base classes so we can allocate space before parsing */
585 for (p = *pp; p && *p && *p != ';'; p++)
590 bnum++; /* add one more for last one */
592 /* now parse the base classes until we get to the start of the methods
593 (code extracted and munged from read_baseclasses) */
594 ALLOCATE_CPLUS_STRUCT_TYPE (type);
595 TYPE_N_BASECLASSES (type) = bnum;
599 int num_bytes = B_BYTES (TYPE_N_BASECLASSES (type));
602 pointer = (char *) TYPE_ALLOC (type, num_bytes);
603 TYPE_FIELD_VIRTUAL_BITS (type) = (B_TYPE *) pointer;
605 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type), TYPE_N_BASECLASSES (type));
607 for (i = 0; i < TYPE_N_BASECLASSES (type); i++)
609 new = (struct nextfield *) xmalloc (sizeof (struct nextfield));
610 make_cleanup (xfree, new);
611 memset (new, 0, sizeof (struct nextfield));
612 new->next = fip->list;
614 FIELD_BITSIZE (new->field) = 0; /* this should be an unpacked field! */
616 STABS_CONTINUE (pp, objfile);
618 /* virtual? eg: v2@Bvir */
621 SET_TYPE_FIELD_VIRTUAL (type, i);
625 /* access? eg: 2@Bvir */
626 /* Note: protected inheritance not supported in cfront */
629 case CFRONT_VISIBILITY_PRIVATE:
630 new->visibility = VISIBILITY_PRIVATE;
632 case CFRONT_VISIBILITY_PUBLIC:
633 new->visibility = VISIBILITY_PUBLIC;
636 /* Bad visibility format. Complain and treat it as
639 complaint (&symfile_complaints,
640 "Unknown visibility `%c' for baseclass",
642 new->visibility = VISIBILITY_PUBLIC;
646 /* "@" comes next - eg: @Bvir */
649 msg_unknown_complaint (*pp);
655 /* Set the bit offset of the portion of the object corresponding
656 to this baseclass. Always zero in the absence of
657 multiple inheritance. */
658 /* Unable to read bit position from stabs;
659 Assuming no multiple inheritance for now FIXME! */
660 /* We may have read this in the structure definition;
661 now we should fixup the members to be the actual base classes */
662 FIELD_BITPOS (new->field) = 0;
664 /* Get the base class name and type */
666 char *bname; /* base class name */
667 struct symbol *bsym; /* base class */
669 p1 = strchr (*pp, ' ');
670 p2 = strchr (*pp, ';');
672 bname = get_substring (pp, ' ');
674 bname = get_substring (pp, ';');
675 if (!bname || !*bname)
677 msg_unknown_complaint (*pp);
680 /* FIXME! attach base info to type */
681 bsym = lookup_symbol (bname, 0, STRUCT_NAMESPACE, 0, 0); /*demangled_name */
684 new->field.type = SYMBOL_TYPE (bsym);
685 new->field.name = type_name_no_tag (new->field.type);
689 complaint (&symfile_complaints, "Unable to find base type for %s",
695 /* If more base classes to parse, loop again.
696 We ate the last ' ' or ';' in get_substring,
697 so on exit we will have skipped the trailing ';' */
698 /* if invalid, return 0; add code to detect - FIXME! */
703 /* read cfront member functions.
704 pp points to string starting with list of functions
705 eg: A:ZcA;1@Bpub v2@Bvirpri;__ct__1AFv func__1AFv *sfunc__1AFv ;as__1A ;;
706 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
707 A:ZcA;;foopri__1AFv foopro__1AFv __ct__1AFv __ct__1AFRC1A foopub__1AFv ;;;
708 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
712 read_cfront_member_functions (struct field_info *fip, char **pp,
713 struct type *type, struct objfile *objfile)
715 /* This code extracted from read_member_functions
716 so as to do the similar thing for our funcs */
720 /* Total number of member functions defined in this class. If the class
721 defines two `f' functions, and one `g' function, then this will have
723 int total_length = 0;
727 struct next_fnfield *next;
728 struct fn_field fn_field;
731 struct type *look_ahead_type;
732 struct next_fnfieldlist *new_fnlist;
733 struct next_fnfield *new_sublist;
736 struct symbol *ref_func = 0;
738 /* Process each list until we find the end of the member functions.
739 eg: p = "__ct__1AFv foo__1AFv ;;;" */
741 STABS_CONTINUE (pp, objfile); /* handle \\ */
743 while (**pp != ';' && (fname = get_substring (pp, ' '), fname))
746 int sublist_count = 0;
748 if (fname[0] == '*') /* static member */
754 ref_func = lookup_symbol (fname, 0, VAR_NAMESPACE, 0, 0); /* demangled name */
757 complaint (&symfile_complaints,
758 "Unable to find function symbol for %s", fname);
762 look_ahead_type = NULL;
765 new_fnlist = (struct next_fnfieldlist *)
766 xmalloc (sizeof (struct next_fnfieldlist));
767 make_cleanup (xfree, new_fnlist);
768 memset (new_fnlist, 0, sizeof (struct next_fnfieldlist));
770 /* The following is code to work around cfront generated stabs.
771 The stabs contains full mangled name for each field.
772 We try to demangle the name and extract the field name out of it. */
774 char *dem, *dem_p, *dem_args;
776 dem = cplus_demangle (fname, DMGL_ANSI | DMGL_PARAMS);
779 dem_p = strrchr (dem, ':');
780 if (dem_p != 0 && *(dem_p - 1) == ':')
782 /* get rid of args */
783 dem_args = strchr (dem_p, '(');
784 if (dem_args == NULL)
785 dem_len = strlen (dem_p);
787 dem_len = dem_args - dem_p;
789 obsavestring (dem_p, dem_len, &objfile->type_obstack);
794 obsavestring (fname, strlen (fname), &objfile->type_obstack);
796 } /* end of code for cfront work around */
798 new_fnlist->fn_fieldlist.name = main_fn_name;
800 /*-------------------------------------------------*/
801 /* Set up the sublists
802 Sublists are stuff like args, static, visibility, etc.
803 so in ARM, we have to set that info some other way.
804 Multiple sublists happen if overloading
805 eg: foo::26=##1;:;2A.;
806 In g++, we'd loop here thru all the sublists... */
809 (struct next_fnfield *) xmalloc (sizeof (struct next_fnfield));
810 make_cleanup (xfree, new_sublist);
811 memset (new_sublist, 0, sizeof (struct next_fnfield));
813 /* eat 1; from :;2A.; */
814 new_sublist->fn_field.type = SYMBOL_TYPE (ref_func); /* normally takes a read_type */
815 /* Make this type look like a method stub for gdb */
816 TYPE_FLAGS (new_sublist->fn_field.type) |= TYPE_FLAG_STUB;
817 TYPE_CODE (new_sublist->fn_field.type) = TYPE_CODE_METHOD;
819 /* If this is just a stub, then we don't have the real name here. */
820 if (TYPE_STUB (new_sublist->fn_field.type))
822 if (!TYPE_DOMAIN_TYPE (new_sublist->fn_field.type))
823 TYPE_DOMAIN_TYPE (new_sublist->fn_field.type) = type;
824 new_sublist->fn_field.is_stub = 1;
827 /* physname used later in mangling; eg PFs_i,5 for foo__1aFPFs_i
828 physname gets strcat'd in order to recreate the onto mangled name */
829 pname = get_cfront_method_physname (fname);
830 new_sublist->fn_field.physname = savestring (pname, strlen (pname));
833 /* Set this member function's visibility fields.
834 Unable to distinguish access from stabs definition!
835 Assuming public for now. FIXME!
836 (for private, set new_sublist->fn_field.is_private = 1,
837 for public, set new_sublist->fn_field.is_protected = 1) */
839 /* Unable to distinguish const/volatile from stabs definition!
840 Assuming normal for now. FIXME! */
842 new_sublist->fn_field.is_const = 0;
843 new_sublist->fn_field.is_volatile = 0; /* volatile not implemented in cfront */
845 /* Set virtual/static function info
846 How to get vtable offsets ?
847 Assuming normal for now FIXME!!
848 For vtables, figure out from whence this virtual function came.
849 It may belong to virtual function table of
850 one of its baseclasses.
852 new_sublist -> fn_field.voffset = vtable offset,
853 new_sublist -> fn_field.fcontext = look_ahead_type;
854 where look_ahead_type is type of baseclass */
856 new_sublist->fn_field.voffset = VOFFSET_STATIC;
857 else /* normal member function. */
858 new_sublist->fn_field.voffset = 0;
859 new_sublist->fn_field.fcontext = 0;
862 /* Prepare new sublist */
863 new_sublist->next = sublist;
864 sublist = new_sublist;
867 /* In g++, we loop thu sublists - now we set from functions. */
868 new_fnlist->fn_fieldlist.fn_fields = (struct fn_field *)
869 obstack_alloc (&objfile->type_obstack,
870 sizeof (struct fn_field) * length);
871 memset (new_fnlist->fn_fieldlist.fn_fields, 0,
872 sizeof (struct fn_field) * length);
873 for (i = length; (i--, sublist); sublist = sublist->next)
875 new_fnlist->fn_fieldlist.fn_fields[i] = sublist->fn_field;
878 new_fnlist->fn_fieldlist.length = length;
879 new_fnlist->next = fip->fnlist;
880 fip->fnlist = new_fnlist;
882 total_length += length;
883 STABS_CONTINUE (pp, objfile); /* handle \\ */
888 /* type should already have space */
889 TYPE_FN_FIELDLISTS (type) = (struct fn_fieldlist *)
890 TYPE_ALLOC (type, sizeof (struct fn_fieldlist) * nfn_fields);
891 memset (TYPE_FN_FIELDLISTS (type), 0,
892 sizeof (struct fn_fieldlist) * nfn_fields);
893 TYPE_NFN_FIELDS (type) = nfn_fields;
894 TYPE_NFN_FIELDS_TOTAL (type) = total_length;
897 /* end of scope for reading member func */
901 /* Skip trailing ';' and bump count of number of fields seen */
909 /* This routine fixes up partial cfront types that were created
910 while parsing the stabs. The main need for this function is
911 to add information such as methods to classes.
912 Examples of "p": "sA;;__ct__1AFv foo__1AFv ;;;" */
914 resolve_cfront_continuation (struct objfile *objfile, struct symbol *sym,
917 struct symbol *ref_sym = 0;
919 /* snarfed from read_struct_type */
920 struct field_info fi;
922 struct cleanup *back_to;
924 /* Need to make sure that fi isn't gunna conflict with struct
925 in case struct already had some fnfs */
928 back_to = make_cleanup (null_cleanup, 0);
930 /* We only accept structs, classes and unions at the moment.
931 Other continuation types include t (typedef), r (long dbl), ...
932 We may want to add support for them as well;
933 right now they are handled by duplicating the symbol information
934 into the type information (see define_symbol) */
935 if (*p != 's' /* structs */
936 && *p != 'c' /* class */
937 && *p != 'u') /* union */
938 return 0; /* only handle C++ types */
941 /* Get symbol typs name and validate
942 eg: p = "A;;__ct__1AFv foo__1AFv ;;;" */
943 sname = get_substring (&p, ';');
944 if (!sname || strcmp (sname, SYMBOL_NAME (sym)))
945 error ("Internal error: base symbol type name does not match\n");
947 /* Find symbol's internal gdb reference using demangled_name.
948 This is the real sym that we want;
949 sym was a temp hack to make debugger happy */
950 ref_sym = lookup_symbol (SYMBOL_NAME (sym), 0, STRUCT_NAMESPACE, 0, 0);
951 type = SYMBOL_TYPE (ref_sym);
954 /* Now read the baseclasses, if any, read the regular C struct or C++
955 class member fields, attach the fields to the type, read the C++
956 member functions, attach them to the type, and then read any tilde
957 field (baseclass specifier for the class holding the main vtable). */
959 if (!read_cfront_baseclasses (&fi, &p, type, objfile)
960 /* g++ does this next, but cfront already did this:
961 || !read_struct_fields (&fi, &p, type, objfile) */
962 || !copy_cfront_struct_fields (&fi, type, objfile)
963 || !read_cfront_member_functions (&fi, &p, type, objfile)
964 || !read_cfront_static_fields (&fi, &p, type, objfile)
965 || !attach_fields_to_type (&fi, type, objfile)
966 || !attach_fn_fields_to_type (&fi, type)
967 /* g++ does this next, but cfront doesn't seem to have this:
968 || !read_tilde_fields (&fi, &p, type, objfile) */
971 type = error_type (&p, objfile);
974 do_cleanups (back_to);
977 /* End of code added to support parsing of ARM/Cfront stabs strings */
980 /* This routine fixes up symbol references/aliases to point to the original
981 symbol definition. Returns 0 on failure, non-zero on success. */
984 resolve_symbol_reference (struct objfile *objfile, struct symbol *sym, char *p)
987 struct symbol *ref_sym = 0;
988 struct alias_list *alias;
990 /* If this is not a symbol reference return now. */
994 /* Use "#<num>" as the name; we'll fix the name later.
995 We stored the original symbol name as "#<id>=<name>"
996 so we can now search for "#<id>" to resolving the reference.
997 We'll fix the names later by removing the "#<id>" or "#<id>=" */
999 /*---------------------------------------------------------*/
1000 /* Get the reference id number, and
1001 advance p past the names so we can parse the rest.
1002 eg: id=2 for p : "2=", "2=z:r(0,1)" "2:r(0,1);l(#5,#6),l(#7,#4)" */
1003 /*---------------------------------------------------------*/
1005 /* This gets reference name from string. sym may not have a name. */
1007 /* Get the reference number associated with the reference id in the
1008 gdb stab string. From that reference number, get the main/primary
1009 symbol for this alias. */
1010 refnum = process_reference (&p);
1011 ref_sym = ref_search (refnum);
1014 lrs_general_complaint ("symbol for reference not found");
1018 /* Parse the stab of the referencing symbol
1019 now that we have the referenced symbol.
1020 Add it as a new symbol and a link back to the referenced symbol.
1021 eg: p : "=", "=z:r(0,1)" ":r(0,1);l(#5,#6),l(#7,#4)" */
1024 /* If the stab symbol table and string contain:
1025 RSYM 0 5 00000000 868 #15=z:r(0,1)
1026 LBRAC 0 0 00000000 899 #5=
1027 SLINE 0 16 00000003 923 #6=
1028 Then the same symbols can be later referenced by:
1029 RSYM 0 5 00000000 927 #15:r(0,1);l(#5,#6)
1030 This is used in live range splitting to:
1031 1) specify that a symbol (#15) is actually just a new storage
1032 class for a symbol (#15=z) which was previously defined.
1033 2) specify that the beginning and ending ranges for a symbol
1034 (#15) are the values of the beginning (#5) and ending (#6)
1037 /* Read number as reference id.
1038 eg: p : "=", "=z:r(0,1)" ":r(0,1);l(#5,#6),l(#7,#4)" */
1039 /* FIXME! Might I want to use SYMBOL_CLASS (sym) = LOC_OPTIMIZED_OUT;
1040 in case of "l(0,0)"? */
1042 /*--------------------------------------------------*/
1043 /* Add this symbol to the reference list. */
1044 /*--------------------------------------------------*/
1046 alias = (struct alias_list *) obstack_alloc (&objfile->type_obstack,
1047 sizeof (struct alias_list));
1050 lrs_general_complaint ("Unable to allocate alias list memory");
1057 if (!SYMBOL_ALIASES (ref_sym))
1059 SYMBOL_ALIASES (ref_sym) = alias;
1063 struct alias_list *temp;
1065 /* Get to the end of the list. */
1066 for (temp = SYMBOL_ALIASES (ref_sym);
1073 /* Want to fix up name so that other functions (eg. valops)
1074 will correctly print the name.
1075 Don't add_symbol_to_list so that lookup_symbol won't find it.
1076 nope... needed for fixups. */
1077 SYMBOL_NAME (sym) = SYMBOL_NAME (ref_sym);
1083 /* Structure for storing pointers to reference definitions for fast lookup
1084 during "process_later". */
1093 #define MAX_CHUNK_REFS 100
1094 #define REF_CHUNK_SIZE (MAX_CHUNK_REFS * sizeof (struct ref_map))
1095 #define REF_MAP_SIZE(ref_chunk) ((ref_chunk) * REF_CHUNK_SIZE)
1097 static struct ref_map *ref_map;
1099 /* Ptr to free cell in chunk's linked list. */
1100 static int ref_count = 0;
1102 /* Number of chunks malloced. */
1103 static int ref_chunk = 0;
1105 /* This file maintains a cache of stabs aliases found in the symbol
1106 table. If the symbol table changes, this cache must be cleared
1107 or we are left holding onto data in invalid obstacks. */
1109 stabsread_clear_cache (void)
1115 /* Create array of pointers mapping refids to symbols and stab strings.
1116 Add pointers to reference definition symbols and/or their values as we
1117 find them, using their reference numbers as our index.
1118 These will be used later when we resolve references. */
1120 ref_add (int refnum, struct symbol *sym, char *stabs, CORE_ADDR value)
1124 if (refnum >= ref_count)
1125 ref_count = refnum + 1;
1126 if (ref_count > ref_chunk * MAX_CHUNK_REFS)
1128 int new_slots = ref_count - ref_chunk * MAX_CHUNK_REFS;
1129 int new_chunks = new_slots / MAX_CHUNK_REFS + 1;
1130 ref_map = (struct ref_map *)
1131 xrealloc (ref_map, REF_MAP_SIZE (ref_chunk + new_chunks));
1132 memset (ref_map + ref_chunk * MAX_CHUNK_REFS, 0, new_chunks * REF_CHUNK_SIZE);
1133 ref_chunk += new_chunks;
1135 ref_map[refnum].stabs = stabs;
1136 ref_map[refnum].sym = sym;
1137 ref_map[refnum].value = value;
1140 /* Return defined sym for the reference REFNUM. */
1142 ref_search (int refnum)
1144 if (refnum < 0 || refnum > ref_count)
1146 return ref_map[refnum].sym;
1149 /* Return value for the reference REFNUM. */
1152 ref_search_value (int refnum)
1154 if (refnum < 0 || refnum > ref_count)
1156 return ref_map[refnum].value;
1159 /* Parse a reference id in STRING and return the resulting
1160 reference number. Move STRING beyond the reference id. */
1163 process_reference (char **string)
1168 if (**string != '#')
1171 /* Advance beyond the initial '#'. */
1174 /* Read number as reference id. */
1175 while (*p && isdigit (*p))
1177 refnum = refnum * 10 + *p - '0';
1184 /* If STRING defines a reference, store away a pointer to the reference
1185 definition for later use. Return the reference number. */
1188 symbol_reference_defined (char **string)
1193 refnum = process_reference (&p);
1195 /* Defining symbols end in '=' */
1198 /* Symbol is being defined here. */
1204 /* Must be a reference. Either the symbol has already been defined,
1205 or this is a forward reference to it. */
1213 define_symbol (CORE_ADDR valu, char *string, int desc, int type,
1214 struct objfile *objfile)
1216 register struct symbol *sym;
1217 char *p = (char *) find_name_end (string);
1222 /* We would like to eliminate nameless symbols, but keep their types.
1223 E.g. stab entry ":t10=*2" should produce a type 10, which is a pointer
1224 to type 2, but, should not create a symbol to address that type. Since
1225 the symbol will be nameless, there is no way any user can refer to it. */
1229 /* Ignore syms with empty names. */
1233 /* Ignore old-style symbols from cc -go */
1240 p = strchr (p, ':');
1243 /* If a nameless stab entry, all we need is the type, not the symbol.
1244 e.g. ":t10=*2" or a nameless enum like " :T16=ered:0,green:1,blue:2,;" */
1245 nameless = (p == string || ((string[0] == ' ') && (string[1] == ':')));
1247 current_symbol = sym = (struct symbol *)
1248 obstack_alloc (&objfile->symbol_obstack, sizeof (struct symbol));
1249 memset (sym, 0, sizeof (struct symbol));
1251 switch (type & N_TYPE)
1254 SYMBOL_SECTION (sym) = SECT_OFF_TEXT (objfile);
1257 SYMBOL_SECTION (sym) = SECT_OFF_DATA (objfile);
1260 SYMBOL_SECTION (sym) = SECT_OFF_BSS (objfile);
1264 if (processing_gcc_compilation)
1266 /* GCC 2.x puts the line number in desc. SunOS apparently puts in the
1267 number of bytes occupied by a type or object, which we ignore. */
1268 SYMBOL_LINE (sym) = desc;
1272 SYMBOL_LINE (sym) = 0; /* unknown */
1275 if (is_cplus_marker (string[0]))
1277 /* Special GNU C++ names. */
1281 SYMBOL_NAME (sym) = obsavestring ("this", strlen ("this"),
1282 &objfile->symbol_obstack);
1285 case 'v': /* $vtbl_ptr_type */
1286 /* Was: SYMBOL_NAME (sym) = "vptr"; */
1290 SYMBOL_NAME (sym) = obsavestring ("eh_throw", strlen ("eh_throw"),
1291 &objfile->symbol_obstack);
1295 /* This was an anonymous type that was never fixed up. */
1298 #ifdef STATIC_TRANSFORM_NAME
1300 /* SunPRO (3.0 at least) static variable encoding. */
1305 complaint (&symfile_complaints, "Unknown C++ symbol name `%s'",
1307 goto normal; /* Do *something* with it */
1310 else if (string[0] == '#')
1312 /* Special GNU C extension for referencing symbols. */
1316 /* If STRING defines a new reference id, then add it to the
1317 reference map. Else it must be referring to a previously
1318 defined symbol, so add it to the alias list of the previously
1321 refnum = symbol_reference_defined (&s);
1323 ref_add (refnum, sym, string, SYMBOL_VALUE (sym));
1324 else if (!resolve_symbol_reference (objfile, sym, string))
1327 /* S..P contains the name of the symbol. We need to store
1328 the correct name into SYMBOL_NAME. */
1334 SYMBOL_NAME (sym) = (char *)
1335 obstack_alloc (&objfile->symbol_obstack, nlen);
1336 strncpy (SYMBOL_NAME (sym), s, nlen);
1337 SYMBOL_NAME (sym)[nlen] = '\0';
1338 SYMBOL_INIT_DEMANGLED_NAME (sym, &objfile->symbol_obstack);
1341 /* FIXME! Want SYMBOL_NAME (sym) = 0;
1342 Get error if leave name 0. So give it something. */
1345 SYMBOL_NAME (sym) = (char *)
1346 obstack_alloc (&objfile->symbol_obstack, nlen);
1347 strncpy (SYMBOL_NAME (sym), string, nlen);
1348 SYMBOL_NAME (sym)[nlen] = '\0';
1349 SYMBOL_INIT_DEMANGLED_NAME (sym, &objfile->symbol_obstack);
1352 /* Advance STRING beyond the reference id. */
1358 SYMBOL_LANGUAGE (sym) = current_subfile->language;
1359 SYMBOL_NAME (sym) = (char *)
1360 obstack_alloc (&objfile->symbol_obstack, ((p - string) + 1));
1361 /* Open-coded memcpy--saves function call time. */
1362 /* FIXME: Does it really? Try replacing with simple strcpy and
1363 try it on an executable with a large symbol table. */
1364 /* FIXME: considering that gcc can open code memcpy anyway, I
1365 doubt it. xoxorich. */
1367 register char *p1 = string;
1368 register char *p2 = SYMBOL_NAME (sym);
1376 /* If this symbol is from a C++ compilation, then attempt to cache the
1377 demangled form for future reference. This is a typical time versus
1378 space tradeoff, that was decided in favor of time because it sped up
1379 C++ symbol lookups by a factor of about 20. */
1381 SYMBOL_INIT_DEMANGLED_NAME (sym, &objfile->symbol_obstack);
1385 /* Determine the type of name being defined. */
1387 /* Getting GDB to correctly skip the symbol on an undefined symbol
1388 descriptor and not ever dump core is a very dodgy proposition if
1389 we do things this way. I say the acorn RISC machine can just
1390 fix their compiler. */
1391 /* The Acorn RISC machine's compiler can put out locals that don't
1392 start with "234=" or "(3,4)=", so assume anything other than the
1393 deftypes we know how to handle is a local. */
1394 if (!strchr ("cfFGpPrStTvVXCR", *p))
1396 if (isdigit (*p) || *p == '(' || *p == '-')
1405 /* c is a special case, not followed by a type-number.
1406 SYMBOL:c=iVALUE for an integer constant symbol.
1407 SYMBOL:c=rVALUE for a floating constant symbol.
1408 SYMBOL:c=eTYPE,INTVALUE for an enum constant symbol.
1409 e.g. "b:c=e6,0" for "const b = blob1"
1410 (where type 6 is defined by "blobs:t6=eblob1:0,blob2:1,;"). */
1413 SYMBOL_CLASS (sym) = LOC_CONST;
1414 SYMBOL_TYPE (sym) = error_type (&p, objfile);
1415 SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE;
1416 add_symbol_to_list (sym, &file_symbols);
1424 double d = atof (p);
1427 /* FIXME-if-picky-about-floating-accuracy: Should be using
1428 target arithmetic to get the value. real.c in GCC
1429 probably has the necessary code. */
1431 /* FIXME: lookup_fundamental_type is a hack. We should be
1432 creating a type especially for the type of float constants.
1433 Problem is, what type should it be?
1435 Also, what should the name of this type be? Should we
1436 be using 'S' constants (see stabs.texinfo) instead? */
1438 SYMBOL_TYPE (sym) = lookup_fundamental_type (objfile,
1441 obstack_alloc (&objfile->symbol_obstack,
1442 TYPE_LENGTH (SYMBOL_TYPE (sym)));
1443 store_typed_floating (dbl_valu, SYMBOL_TYPE (sym), d);
1444 SYMBOL_VALUE_BYTES (sym) = dbl_valu;
1445 SYMBOL_CLASS (sym) = LOC_CONST_BYTES;
1450 /* Defining integer constants this way is kind of silly,
1451 since 'e' constants allows the compiler to give not
1452 only the value, but the type as well. C has at least
1453 int, long, unsigned int, and long long as constant
1454 types; other languages probably should have at least
1455 unsigned as well as signed constants. */
1457 /* We just need one int constant type for all objfiles.
1458 It doesn't depend on languages or anything (arguably its
1459 name should be a language-specific name for a type of
1460 that size, but I'm inclined to say that if the compiler
1461 wants a nice name for the type, it can use 'e'). */
1462 static struct type *int_const_type;
1464 /* Yes, this is as long as a *host* int. That is because we
1466 if (int_const_type == NULL)
1468 init_type (TYPE_CODE_INT,
1469 sizeof (int) * HOST_CHAR_BIT / TARGET_CHAR_BIT, 0,
1471 (struct objfile *) NULL);
1472 SYMBOL_TYPE (sym) = int_const_type;
1473 SYMBOL_VALUE (sym) = atoi (p);
1474 SYMBOL_CLASS (sym) = LOC_CONST;
1478 /* SYMBOL:c=eTYPE,INTVALUE for a constant symbol whose value
1479 can be represented as integral.
1480 e.g. "b:c=e6,0" for "const b = blob1"
1481 (where type 6 is defined by "blobs:t6=eblob1:0,blob2:1,;"). */
1483 SYMBOL_CLASS (sym) = LOC_CONST;
1484 SYMBOL_TYPE (sym) = read_type (&p, objfile);
1488 SYMBOL_TYPE (sym) = error_type (&p, objfile);
1493 /* If the value is too big to fit in an int (perhaps because
1494 it is unsigned), or something like that, we silently get
1495 a bogus value. The type and everything else about it is
1496 correct. Ideally, we should be using whatever we have
1497 available for parsing unsigned and long long values,
1499 SYMBOL_VALUE (sym) = atoi (p);
1504 SYMBOL_CLASS (sym) = LOC_CONST;
1505 SYMBOL_TYPE (sym) = error_type (&p, objfile);
1508 SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE;
1509 add_symbol_to_list (sym, &file_symbols);
1513 /* The name of a caught exception. */
1514 SYMBOL_TYPE (sym) = read_type (&p, objfile);
1515 SYMBOL_CLASS (sym) = LOC_LABEL;
1516 SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE;
1517 SYMBOL_VALUE_ADDRESS (sym) = valu;
1518 add_symbol_to_list (sym, &local_symbols);
1522 /* A static function definition. */
1523 SYMBOL_TYPE (sym) = read_type (&p, objfile);
1524 SYMBOL_CLASS (sym) = LOC_BLOCK;
1525 SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE;
1526 add_symbol_to_list (sym, &file_symbols);
1527 /* fall into process_function_types. */
1529 process_function_types:
1530 /* Function result types are described as the result type in stabs.
1531 We need to convert this to the function-returning-type-X type
1532 in GDB. E.g. "int" is converted to "function returning int". */
1533 if (TYPE_CODE (SYMBOL_TYPE (sym)) != TYPE_CODE_FUNC)
1534 SYMBOL_TYPE (sym) = lookup_function_type (SYMBOL_TYPE (sym));
1536 /* All functions in C++ have prototypes. */
1537 if (SYMBOL_LANGUAGE (sym) == language_cplus)
1538 TYPE_FLAGS (SYMBOL_TYPE (sym)) |= TYPE_FLAG_PROTOTYPED;
1540 /* fall into process_prototype_types */
1542 process_prototype_types:
1543 /* Sun acc puts declared types of arguments here. */
1546 struct type *ftype = SYMBOL_TYPE (sym);
1551 /* Obtain a worst case guess for the number of arguments
1552 by counting the semicolons. */
1559 /* Allocate parameter information fields and fill them in. */
1560 TYPE_FIELDS (ftype) = (struct field *)
1561 TYPE_ALLOC (ftype, nsemi * sizeof (struct field));
1566 /* A type number of zero indicates the start of varargs.
1567 FIXME: GDB currently ignores vararg functions. */
1568 if (p[0] == '0' && p[1] == '\0')
1570 ptype = read_type (&p, objfile);
1572 /* The Sun compilers mark integer arguments, which should
1573 be promoted to the width of the calling conventions, with
1574 a type which references itself. This type is turned into
1575 a TYPE_CODE_VOID type by read_type, and we have to turn
1576 it back into builtin_type_int here.
1577 FIXME: Do we need a new builtin_type_promoted_int_arg ? */
1578 if (TYPE_CODE (ptype) == TYPE_CODE_VOID)
1579 ptype = builtin_type_int;
1580 TYPE_FIELD_TYPE (ftype, nparams) = ptype;
1581 TYPE_FIELD_ARTIFICIAL (ftype, nparams++) = 0;
1583 TYPE_NFIELDS (ftype) = nparams;
1584 TYPE_FLAGS (ftype) |= TYPE_FLAG_PROTOTYPED;
1589 /* A global function definition. */
1590 SYMBOL_TYPE (sym) = read_type (&p, objfile);
1591 SYMBOL_CLASS (sym) = LOC_BLOCK;
1592 SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE;
1593 add_symbol_to_list (sym, &global_symbols);
1594 goto process_function_types;
1597 /* For a class G (global) symbol, it appears that the
1598 value is not correct. It is necessary to search for the
1599 corresponding linker definition to find the value.
1600 These definitions appear at the end of the namelist. */
1601 SYMBOL_TYPE (sym) = read_type (&p, objfile);
1602 SYMBOL_CLASS (sym) = LOC_STATIC;
1603 SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE;
1604 /* Don't add symbol references to global_sym_chain.
1605 Symbol references don't have valid names and wont't match up with
1606 minimal symbols when the global_sym_chain is relocated.
1607 We'll fixup symbol references when we fixup the defining symbol. */
1608 if (SYMBOL_NAME (sym) && SYMBOL_NAME (sym)[0] != '#')
1610 i = hashname (SYMBOL_NAME (sym));
1611 SYMBOL_VALUE_CHAIN (sym) = global_sym_chain[i];
1612 global_sym_chain[i] = sym;
1614 add_symbol_to_list (sym, &global_symbols);
1617 /* This case is faked by a conditional above,
1618 when there is no code letter in the dbx data.
1619 Dbx data never actually contains 'l'. */
1622 SYMBOL_TYPE (sym) = read_type (&p, objfile);
1623 SYMBOL_CLASS (sym) = LOC_LOCAL;
1624 SYMBOL_VALUE (sym) = valu;
1625 SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE;
1626 add_symbol_to_list (sym, &local_symbols);
1631 /* pF is a two-letter code that means a function parameter in Fortran.
1632 The type-number specifies the type of the return value.
1633 Translate it into a pointer-to-function type. */
1637 = lookup_pointer_type
1638 (lookup_function_type (read_type (&p, objfile)));
1641 SYMBOL_TYPE (sym) = read_type (&p, objfile);
1643 /* Normally this is a parameter, a LOC_ARG. On the i960, it
1644 can also be a LOC_LOCAL_ARG depending on symbol type. */
1645 #ifndef DBX_PARM_SYMBOL_CLASS
1646 #define DBX_PARM_SYMBOL_CLASS(type) LOC_ARG
1649 SYMBOL_CLASS (sym) = DBX_PARM_SYMBOL_CLASS (type);
1650 SYMBOL_VALUE (sym) = valu;
1651 SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE;
1652 add_symbol_to_list (sym, &local_symbols);
1654 if (TARGET_BYTE_ORDER != BFD_ENDIAN_BIG)
1656 /* On little-endian machines, this crud is never necessary,
1657 and, if the extra bytes contain garbage, is harmful. */
1661 /* If it's gcc-compiled, if it says `short', believe it. */
1662 if (processing_gcc_compilation || BELIEVE_PCC_PROMOTION)
1665 if (!BELIEVE_PCC_PROMOTION)
1667 /* This is the signed type which arguments get promoted to. */
1668 static struct type *pcc_promotion_type;
1669 /* This is the unsigned type which arguments get promoted to. */
1670 static struct type *pcc_unsigned_promotion_type;
1672 /* Call it "int" because this is mainly C lossage. */
1673 if (pcc_promotion_type == NULL)
1674 pcc_promotion_type =
1675 init_type (TYPE_CODE_INT, TARGET_INT_BIT / TARGET_CHAR_BIT,
1678 if (pcc_unsigned_promotion_type == NULL)
1679 pcc_unsigned_promotion_type =
1680 init_type (TYPE_CODE_INT, TARGET_INT_BIT / TARGET_CHAR_BIT,
1681 TYPE_FLAG_UNSIGNED, "unsigned int", NULL);
1683 if (BELIEVE_PCC_PROMOTION_TYPE)
1685 /* This is defined on machines (e.g. sparc) where we
1686 should believe the type of a PCC 'short' argument,
1687 but shouldn't believe the address (the address is the
1688 address of the corresponding int).
1690 My guess is that this correction, as opposed to
1691 changing the parameter to an 'int' (as done below,
1692 for PCC on most machines), is the right thing to do
1693 on all machines, but I don't want to risk breaking
1694 something that already works. On most PCC machines,
1695 the sparc problem doesn't come up because the calling
1696 function has to zero the top bytes (not knowing
1697 whether the called function wants an int or a short),
1698 so there is little practical difference between an
1699 int and a short (except perhaps what happens when the
1700 GDB user types "print short_arg = 0x10000;").
1702 Hacked for SunOS 4.1 by gnu@cygnus.com. In 4.1, the
1703 compiler actually produces the correct address (we
1704 don't need to fix it up). I made this code adapt so
1705 that it will offset the symbol if it was pointing at
1706 an int-aligned location and not otherwise. This way
1707 you can use the same gdb for 4.0.x and 4.1 systems.
1709 If the parameter is shorter than an int, and is
1710 integral (e.g. char, short, or unsigned equivalent),
1711 and is claimed to be passed on an integer boundary,
1712 don't believe it! Offset the parameter's address to
1713 the tail-end of that integer. */
1715 if (TYPE_LENGTH (SYMBOL_TYPE (sym)) < TYPE_LENGTH (pcc_promotion_type)
1716 && TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_INT
1717 && 0 == SYMBOL_VALUE (sym) % TYPE_LENGTH (pcc_promotion_type))
1719 SYMBOL_VALUE (sym) += TYPE_LENGTH (pcc_promotion_type)
1720 - TYPE_LENGTH (SYMBOL_TYPE (sym));
1726 /* If PCC says a parameter is a short or a char,
1727 it is really an int. */
1728 if (TYPE_LENGTH (SYMBOL_TYPE (sym)) < TYPE_LENGTH (pcc_promotion_type)
1729 && TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_INT)
1732 TYPE_UNSIGNED (SYMBOL_TYPE (sym))
1733 ? pcc_unsigned_promotion_type
1734 : pcc_promotion_type;
1741 /* acc seems to use P to declare the prototypes of functions that
1742 are referenced by this file. gdb is not prepared to deal
1743 with this extra information. FIXME, it ought to. */
1746 SYMBOL_TYPE (sym) = read_type (&p, objfile);
1747 goto process_prototype_types;
1752 /* Parameter which is in a register. */
1753 SYMBOL_TYPE (sym) = read_type (&p, objfile);
1754 SYMBOL_CLASS (sym) = LOC_REGPARM;
1755 SYMBOL_VALUE (sym) = STAB_REG_TO_REGNUM (valu);
1756 if (SYMBOL_VALUE (sym) >= NUM_REGS + NUM_PSEUDO_REGS)
1758 reg_value_complaint (SYMBOL_VALUE (sym),
1759 NUM_REGS + NUM_PSEUDO_REGS,
1760 SYMBOL_SOURCE_NAME (sym));
1761 SYMBOL_VALUE (sym) = SP_REGNUM; /* Known safe, though useless */
1763 SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE;
1764 add_symbol_to_list (sym, &local_symbols);
1768 /* Register variable (either global or local). */
1769 SYMBOL_TYPE (sym) = read_type (&p, objfile);
1770 SYMBOL_CLASS (sym) = LOC_REGISTER;
1771 SYMBOL_VALUE (sym) = STAB_REG_TO_REGNUM (valu);
1772 if (SYMBOL_VALUE (sym) >= NUM_REGS + NUM_PSEUDO_REGS)
1774 reg_value_complaint (SYMBOL_VALUE (sym),
1775 NUM_REGS + NUM_PSEUDO_REGS,
1776 SYMBOL_SOURCE_NAME (sym));
1777 SYMBOL_VALUE (sym) = SP_REGNUM; /* Known safe, though useless */
1779 SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE;
1780 if (within_function)
1782 /* Sun cc uses a pair of symbols, one 'p' and one 'r' with the same
1783 name to represent an argument passed in a register.
1784 GCC uses 'P' for the same case. So if we find such a symbol pair
1785 we combine it into one 'P' symbol. For Sun cc we need to do this
1786 regardless of REG_STRUCT_HAS_ADDR, because the compiler puts out
1787 the 'p' symbol even if it never saves the argument onto the stack.
1789 On most machines, we want to preserve both symbols, so that
1790 we can still get information about what is going on with the
1791 stack (VAX for computing args_printed, using stack slots instead
1792 of saved registers in backtraces, etc.).
1794 Note that this code illegally combines
1795 main(argc) struct foo argc; { register struct foo argc; }
1796 but this case is considered pathological and causes a warning
1797 from a decent compiler. */
1800 && local_symbols->nsyms > 0
1801 #ifndef USE_REGISTER_NOT_ARG
1802 && REG_STRUCT_HAS_ADDR_P ()
1803 && REG_STRUCT_HAS_ADDR (processing_gcc_compilation,
1805 && (TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_STRUCT
1806 || TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_UNION
1807 || TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_SET
1808 || TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_BITSTRING)
1812 struct symbol *prev_sym;
1813 prev_sym = local_symbols->symbol[local_symbols->nsyms - 1];
1814 if ((SYMBOL_CLASS (prev_sym) == LOC_REF_ARG
1815 || SYMBOL_CLASS (prev_sym) == LOC_ARG)
1816 && STREQ (SYMBOL_NAME (prev_sym), SYMBOL_NAME (sym)))
1818 SYMBOL_CLASS (prev_sym) = LOC_REGPARM;
1819 /* Use the type from the LOC_REGISTER; that is the type
1820 that is actually in that register. */
1821 SYMBOL_TYPE (prev_sym) = SYMBOL_TYPE (sym);
1822 SYMBOL_VALUE (prev_sym) = SYMBOL_VALUE (sym);
1827 add_symbol_to_list (sym, &local_symbols);
1830 add_symbol_to_list (sym, &file_symbols);
1834 /* Static symbol at top level of file */
1835 SYMBOL_TYPE (sym) = read_type (&p, objfile);
1836 SYMBOL_CLASS (sym) = LOC_STATIC;
1837 SYMBOL_VALUE_ADDRESS (sym) = valu;
1838 #ifdef STATIC_TRANSFORM_NAME
1839 if (IS_STATIC_TRANSFORM_NAME (SYMBOL_NAME (sym)))
1841 struct minimal_symbol *msym;
1842 msym = lookup_minimal_symbol (SYMBOL_NAME (sym), NULL, objfile);
1845 SYMBOL_NAME (sym) = STATIC_TRANSFORM_NAME (SYMBOL_NAME (sym));
1846 SYMBOL_VALUE_ADDRESS (sym) = SYMBOL_VALUE_ADDRESS (msym);
1850 SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE;
1851 add_symbol_to_list (sym, &file_symbols);
1856 SYMBOL_TYPE (sym) = read_type (&p, objfile);
1858 /* For a nameless type, we don't want a create a symbol, thus we
1859 did not use `sym'. Return without further processing. */
1863 SYMBOL_CLASS (sym) = LOC_TYPEDEF;
1864 SYMBOL_VALUE (sym) = valu;
1865 SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE;
1866 /* C++ vagaries: we may have a type which is derived from
1867 a base type which did not have its name defined when the
1868 derived class was output. We fill in the derived class's
1869 base part member's name here in that case. */
1870 if (TYPE_NAME (SYMBOL_TYPE (sym)) != NULL)
1871 if ((TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_STRUCT
1872 || TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_UNION)
1873 && TYPE_N_BASECLASSES (SYMBOL_TYPE (sym)))
1876 for (j = TYPE_N_BASECLASSES (SYMBOL_TYPE (sym)) - 1; j >= 0; j--)
1877 if (TYPE_BASECLASS_NAME (SYMBOL_TYPE (sym), j) == 0)
1878 TYPE_BASECLASS_NAME (SYMBOL_TYPE (sym), j) =
1879 type_name_no_tag (TYPE_BASECLASS (SYMBOL_TYPE (sym), j));
1882 if (TYPE_NAME (SYMBOL_TYPE (sym)) == NULL)
1884 /* gcc-2.6 or later (when using -fvtable-thunks)
1885 emits a unique named type for a vtable entry.
1886 Some gdb code depends on that specific name. */
1887 extern const char vtbl_ptr_name[];
1889 if ((TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_PTR
1890 && strcmp (SYMBOL_NAME (sym), vtbl_ptr_name))
1891 || TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_FUNC)
1893 /* If we are giving a name to a type such as "pointer to
1894 foo" or "function returning foo", we better not set
1895 the TYPE_NAME. If the program contains "typedef char
1896 *caddr_t;", we don't want all variables of type char
1897 * to print as caddr_t. This is not just a
1898 consequence of GDB's type management; PCC and GCC (at
1899 least through version 2.4) both output variables of
1900 either type char * or caddr_t with the type number
1901 defined in the 't' symbol for caddr_t. If a future
1902 compiler cleans this up it GDB is not ready for it
1903 yet, but if it becomes ready we somehow need to
1904 disable this check (without breaking the PCC/GCC2.4
1909 Fortunately, this check seems not to be necessary
1910 for anything except pointers or functions. */
1911 /* ezannoni: 2000-10-26. This seems to apply for
1912 versions of gcc older than 2.8. This was the original
1913 problem: with the following code gdb would tell that
1914 the type for name1 is caddr_t, and func is char()
1915 typedef char *caddr_t;
1927 /* Pascal accepts names for pointer types. */
1928 if (current_subfile->language == language_pascal)
1930 TYPE_NAME (SYMBOL_TYPE (sym)) = SYMBOL_NAME (sym);
1934 TYPE_NAME (SYMBOL_TYPE (sym)) = SYMBOL_NAME (sym);
1937 add_symbol_to_list (sym, &file_symbols);
1941 /* Struct, union, or enum tag. For GNU C++, this can be be followed
1942 by 't' which means we are typedef'ing it as well. */
1943 synonym = *p == 't';
1947 /* The semantics of C++ state that "struct foo { ... }" also defines
1948 a typedef for "foo". Unfortunately, cfront never makes the typedef
1949 when translating C++ into C. We make the typedef here so that
1950 "ptype foo" works as expected for cfront translated code. */
1951 else if ((current_subfile->language == language_cplus)
1952 || (current_subfile->language == language_objc))
1955 SYMBOL_TYPE (sym) = read_type (&p, objfile);
1957 /* For a nameless type, we don't want a create a symbol, thus we
1958 did not use `sym'. Return without further processing. */
1962 SYMBOL_CLASS (sym) = LOC_TYPEDEF;
1963 SYMBOL_VALUE (sym) = valu;
1964 SYMBOL_NAMESPACE (sym) = STRUCT_NAMESPACE;
1965 if (TYPE_TAG_NAME (SYMBOL_TYPE (sym)) == 0)
1966 TYPE_TAG_NAME (SYMBOL_TYPE (sym))
1967 = obconcat (&objfile->type_obstack, "", "", SYMBOL_NAME (sym));
1968 add_symbol_to_list (sym, &file_symbols);
1972 /* Clone the sym and then modify it. */
1973 register struct symbol *typedef_sym = (struct symbol *)
1974 obstack_alloc (&objfile->symbol_obstack, sizeof (struct symbol));
1975 *typedef_sym = *sym;
1976 SYMBOL_CLASS (typedef_sym) = LOC_TYPEDEF;
1977 SYMBOL_VALUE (typedef_sym) = valu;
1978 SYMBOL_NAMESPACE (typedef_sym) = VAR_NAMESPACE;
1979 if (TYPE_NAME (SYMBOL_TYPE (sym)) == 0)
1980 TYPE_NAME (SYMBOL_TYPE (sym))
1981 = obconcat (&objfile->type_obstack, "", "", SYMBOL_NAME (sym));
1982 add_symbol_to_list (typedef_sym, &file_symbols);
1987 /* Static symbol of local scope */
1988 SYMBOL_TYPE (sym) = read_type (&p, objfile);
1989 SYMBOL_CLASS (sym) = LOC_STATIC;
1990 SYMBOL_VALUE_ADDRESS (sym) = valu;
1991 #ifdef STATIC_TRANSFORM_NAME
1992 if (IS_STATIC_TRANSFORM_NAME (SYMBOL_NAME (sym)))
1994 struct minimal_symbol *msym;
1995 msym = lookup_minimal_symbol (SYMBOL_NAME (sym), NULL, objfile);
1998 SYMBOL_NAME (sym) = STATIC_TRANSFORM_NAME (SYMBOL_NAME (sym));
1999 SYMBOL_VALUE_ADDRESS (sym) = SYMBOL_VALUE_ADDRESS (msym);
2003 SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE;
2004 add_symbol_to_list (sym, &local_symbols);
2008 /* Reference parameter */
2009 SYMBOL_TYPE (sym) = read_type (&p, objfile);
2010 SYMBOL_CLASS (sym) = LOC_REF_ARG;
2011 SYMBOL_VALUE (sym) = valu;
2012 SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE;
2013 add_symbol_to_list (sym, &local_symbols);
2017 /* Reference parameter which is in a register. */
2018 SYMBOL_TYPE (sym) = read_type (&p, objfile);
2019 SYMBOL_CLASS (sym) = LOC_REGPARM_ADDR;
2020 SYMBOL_VALUE (sym) = STAB_REG_TO_REGNUM (valu);
2021 if (SYMBOL_VALUE (sym) >= NUM_REGS + NUM_PSEUDO_REGS)
2023 reg_value_complaint (SYMBOL_VALUE (sym),
2024 NUM_REGS + NUM_PSEUDO_REGS,
2025 SYMBOL_SOURCE_NAME (sym));
2026 SYMBOL_VALUE (sym) = SP_REGNUM; /* Known safe, though useless */
2028 SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE;
2029 add_symbol_to_list (sym, &local_symbols);
2033 /* This is used by Sun FORTRAN for "function result value".
2034 Sun claims ("dbx and dbxtool interfaces", 2nd ed)
2035 that Pascal uses it too, but when I tried it Pascal used
2036 "x:3" (local symbol) instead. */
2037 SYMBOL_TYPE (sym) = read_type (&p, objfile);
2038 SYMBOL_CLASS (sym) = LOC_LOCAL;
2039 SYMBOL_VALUE (sym) = valu;
2040 SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE;
2041 add_symbol_to_list (sym, &local_symbols);
2044 /* New code added to support cfront stabs strings.
2045 Note: case 'P' already handled above */
2047 /* Cfront type continuation coming up!
2048 Find the original definition and add to it.
2049 We'll have to do this for the typedef too,
2050 since we cloned the symbol to define a type in read_type.
2051 Stabs info examples:
2053 foo__1CFv :ZtF (first def foo__1CFv:F(0,3);(0,24))
2054 C:ZsC;;__ct__1CFv func1__1CFv func2__1CFv ... ;;;
2055 where C is the name of the class.
2056 Unfortunately, we can't lookup the original symbol yet 'cuz
2057 we haven't finished reading all the symbols.
2058 Instead, we save it for processing later */
2059 process_later (sym, p, resolve_cfront_continuation);
2060 SYMBOL_TYPE (sym) = error_type (&p, objfile); /* FIXME! change later */
2061 SYMBOL_CLASS (sym) = LOC_CONST;
2062 SYMBOL_VALUE (sym) = 0;
2063 SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE;
2064 /* Don't add to list - we'll delete it later when
2065 we add the continuation to the real sym */
2067 /* End of new code added to support cfront stabs strings */
2070 SYMBOL_TYPE (sym) = error_type (&p, objfile);
2071 SYMBOL_CLASS (sym) = LOC_CONST;
2072 SYMBOL_VALUE (sym) = 0;
2073 SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE;
2074 add_symbol_to_list (sym, &file_symbols);
2078 /* When passing structures to a function, some systems sometimes pass
2079 the address in a register, not the structure itself. */
2081 if (REG_STRUCT_HAS_ADDR_P ()
2082 && REG_STRUCT_HAS_ADDR (processing_gcc_compilation, SYMBOL_TYPE (sym))
2083 && (SYMBOL_CLASS (sym) == LOC_REGPARM || SYMBOL_CLASS (sym) == LOC_ARG))
2085 struct type *symbol_type = check_typedef (SYMBOL_TYPE (sym));
2087 if ((TYPE_CODE (symbol_type) == TYPE_CODE_STRUCT)
2088 || (TYPE_CODE (symbol_type) == TYPE_CODE_UNION)
2089 || (TYPE_CODE (symbol_type) == TYPE_CODE_BITSTRING)
2090 || (TYPE_CODE (symbol_type) == TYPE_CODE_SET))
2092 /* If REG_STRUCT_HAS_ADDR yields non-zero we have to convert
2093 LOC_REGPARM to LOC_REGPARM_ADDR for structures and unions. */
2094 if (SYMBOL_CLASS (sym) == LOC_REGPARM)
2095 SYMBOL_CLASS (sym) = LOC_REGPARM_ADDR;
2096 /* Likewise for converting LOC_ARG to LOC_REF_ARG (for the 7th
2097 and subsequent arguments on the sparc, for example). */
2098 else if (SYMBOL_CLASS (sym) == LOC_ARG)
2099 SYMBOL_CLASS (sym) = LOC_REF_ARG;
2103 /* Is there more to parse? For example LRS/alias information? */
2104 while (*p && *p == ';')
2107 if (*p && p[0] == 'l' && p[1] == '(')
2109 /* GNU extensions for live range splitting may be appended to
2110 the end of the stab string. eg. "l(#1,#2);l(#3,#5)" */
2112 /* Resolve the live range and add it to SYM's live range list. */
2113 if (!resolve_live_range (objfile, sym, p))
2116 /* Find end of live range info. */
2117 p = strchr (p, ')');
2118 if (!*p || *p != ')')
2120 lrs_general_complaint ("live range format not recognized");
2129 /* Add the live range found in P to the symbol SYM in objfile OBJFILE. Returns
2130 non-zero on success, zero otherwise. */
2133 resolve_live_range (struct objfile *objfile, struct symbol *sym, char *p)
2136 CORE_ADDR start, end;
2138 /* Sanity check the beginning of the stabs string. */
2139 if (!*p || *p != 'l')
2141 lrs_general_complaint ("live range string 1");
2146 if (!*p || *p != '(')
2148 lrs_general_complaint ("live range string 2");
2153 /* Get starting value of range and advance P past the reference id.
2155 ?!? In theory, the process_reference should never fail, but we should
2156 catch that case just in case the compiler scrogged the stabs. */
2157 refnum = process_reference (&p);
2158 start = ref_search_value (refnum);
2161 lrs_general_complaint ("Live range symbol not found 1");
2165 if (!*p || *p != ',')
2167 lrs_general_complaint ("live range string 3");
2172 /* Get ending value of range and advance P past the reference id.
2174 ?!? In theory, the process_reference should never fail, but we should
2175 catch that case just in case the compiler scrogged the stabs. */
2176 refnum = process_reference (&p);
2177 end = ref_search_value (refnum);
2180 lrs_general_complaint ("Live range symbol not found 2");
2184 if (!*p || *p != ')')
2186 lrs_general_complaint ("live range string 4");
2190 /* Now that we know the bounds of the range, add it to the
2192 add_live_range (objfile, sym, start, end);
2197 /* Add a new live range defined by START and END to the symbol SYM
2198 in objfile OBJFILE. */
2201 add_live_range (struct objfile *objfile, struct symbol *sym, CORE_ADDR start,
2204 struct range_list *r, *rs;
2208 lrs_general_complaint ("end of live range follows start");
2212 /* Alloc new live range structure. */
2213 r = (struct range_list *)
2214 obstack_alloc (&objfile->type_obstack,
2215 sizeof (struct range_list));
2220 /* Append this range to the symbol's range list. */
2221 if (!SYMBOL_RANGES (sym))
2222 SYMBOL_RANGES (sym) = r;
2225 /* Get the last range for the symbol. */
2226 for (rs = SYMBOL_RANGES (sym); rs->next; rs = rs->next)
2233 /* Skip rest of this symbol and return an error type.
2235 General notes on error recovery: error_type always skips to the
2236 end of the symbol (modulo cretinous dbx symbol name continuation).
2237 Thus code like this:
2239 if (*(*pp)++ != ';')
2240 return error_type (pp, objfile);
2242 is wrong because if *pp starts out pointing at '\0' (typically as the
2243 result of an earlier error), it will be incremented to point to the
2244 start of the next symbol, which might produce strange results, at least
2245 if you run off the end of the string table. Instead use
2248 return error_type (pp, objfile);
2254 foo = error_type (pp, objfile);
2258 And in case it isn't obvious, the point of all this hair is so the compiler
2259 can define new types and new syntaxes, and old versions of the
2260 debugger will be able to read the new symbol tables. */
2262 static struct type *
2263 error_type (char **pp, struct objfile *objfile)
2265 complaint (&symfile_complaints, "couldn't parse type; debugger out of date?");
2268 /* Skip to end of symbol. */
2269 while (**pp != '\0')
2274 /* Check for and handle cretinous dbx symbol name continuation! */
2275 if ((*pp)[-1] == '\\' || (*pp)[-1] == '?')
2277 *pp = next_symbol_text (objfile);
2284 return (builtin_type_error);
2288 /* Read type information or a type definition; return the type. Even
2289 though this routine accepts either type information or a type
2290 definition, the distinction is relevant--some parts of stabsread.c
2291 assume that type information starts with a digit, '-', or '(' in
2292 deciding whether to call read_type. */
2295 read_type (register char **pp, struct objfile *objfile)
2297 register struct type *type = 0;
2300 char type_descriptor;
2302 /* Size in bits of type if specified by a type attribute, or -1 if
2303 there is no size attribute. */
2306 /* Used to distinguish string and bitstring from char-array and set. */
2309 /* Used to distinguish vector from array. */
2312 /* Read type number if present. The type number may be omitted.
2313 for instance in a two-dimensional array declared with type
2314 "ar1;1;10;ar1;1;10;4". */
2315 if ((**pp >= '0' && **pp <= '9')
2319 if (read_type_number (pp, typenums) != 0)
2320 return error_type (pp, objfile);
2322 /* Type is not being defined here. Either it already exists,
2323 or this is a forward reference to it. dbx_alloc_type handles
2326 return dbx_alloc_type (typenums, objfile);
2328 /* Type is being defined here. */
2330 Also skip the type descriptor - we get it below with (*pp)[-1]. */
2335 /* 'typenums=' not present, type is anonymous. Read and return
2336 the definition, but don't put it in the type vector. */
2337 typenums[0] = typenums[1] = -1;
2342 type_descriptor = (*pp)[-1];
2343 switch (type_descriptor)
2347 enum type_code code;
2349 /* Used to index through file_symbols. */
2350 struct pending *ppt;
2353 /* Name including "struct", etc. */
2357 char *from, *to, *p, *q1, *q2;
2359 /* Set the type code according to the following letter. */
2363 code = TYPE_CODE_STRUCT;
2366 code = TYPE_CODE_UNION;
2369 code = TYPE_CODE_ENUM;
2373 /* Complain and keep going, so compilers can invent new
2374 cross-reference types. */
2375 complaint (&symfile_complaints,
2376 "Unrecognized cross-reference type `%c'", (*pp)[0]);
2377 code = TYPE_CODE_STRUCT;
2382 q1 = strchr (*pp, '<');
2383 p = strchr (*pp, ':');
2385 return error_type (pp, objfile);
2386 if (q1 && p > q1 && p[1] == ':')
2388 int nesting_level = 0;
2389 for (q2 = q1; *q2; q2++)
2393 else if (*q2 == '>')
2395 else if (*q2 == ':' && nesting_level == 0)
2400 return error_type (pp, objfile);
2403 (char *) obstack_alloc (&objfile->type_obstack, p - *pp + 1);
2405 /* Copy the name. */
2411 /* Set the pointer ahead of the name which we just read, and
2416 /* Now check to see whether the type has already been
2417 declared. This was written for arrays of cross-referenced
2418 types before we had TYPE_CODE_TARGET_STUBBED, so I'm pretty
2419 sure it is not necessary anymore. But it might be a good
2420 idea, to save a little memory. */
2422 for (ppt = file_symbols; ppt; ppt = ppt->next)
2423 for (i = 0; i < ppt->nsyms; i++)
2425 struct symbol *sym = ppt->symbol[i];
2427 if (SYMBOL_CLASS (sym) == LOC_TYPEDEF
2428 && SYMBOL_NAMESPACE (sym) == STRUCT_NAMESPACE
2429 && (TYPE_CODE (SYMBOL_TYPE (sym)) == code)
2430 && STREQ (SYMBOL_NAME (sym), type_name))
2432 obstack_free (&objfile->type_obstack, type_name);
2433 type = SYMBOL_TYPE (sym);
2438 /* Didn't find the type to which this refers, so we must
2439 be dealing with a forward reference. Allocate a type
2440 structure for it, and keep track of it so we can
2441 fill in the rest of the fields when we get the full
2443 type = dbx_alloc_type (typenums, objfile);
2444 TYPE_CODE (type) = code;
2445 TYPE_TAG_NAME (type) = type_name;
2446 INIT_CPLUS_SPECIFIC (type);
2447 TYPE_FLAGS (type) |= TYPE_FLAG_STUB;
2449 add_undefined_type (type);
2453 case '-': /* RS/6000 built-in type */
2467 /* We deal with something like t(1,2)=(3,4)=... which
2468 the Lucid compiler and recent gcc versions (post 2.7.3) use. */
2470 /* Allocate and enter the typedef type first.
2471 This handles recursive types. */
2472 type = dbx_alloc_type (typenums, objfile);
2473 TYPE_CODE (type) = TYPE_CODE_TYPEDEF;
2475 struct type *xtype = read_type (pp, objfile);
2478 /* It's being defined as itself. That means it is "void". */
2479 TYPE_CODE (type) = TYPE_CODE_VOID;
2480 TYPE_LENGTH (type) = 1;
2482 else if (type_size >= 0 || is_string)
2484 /* This is the absolute wrong way to construct types. Every
2485 other debug format has found a way around this problem and
2486 the related problems with unnecessarily stubbed types;
2487 someone motivated should attempt to clean up the issue
2488 here as well. Once a type pointed to has been created it
2489 should not be modified.
2491 Well, it's not *absolutely* wrong. Constructing recursive
2492 types (trees, linked lists) necessarily entails modifying
2493 types after creating them. Constructing any loop structure
2494 entails side effects. The Dwarf 2 reader does handle this
2495 more gracefully (it never constructs more than once
2496 instance of a type object, so it doesn't have to copy type
2497 objects wholesale), but it still mutates type objects after
2498 other folks have references to them.
2500 Keep in mind that this circularity/mutation issue shows up
2501 at the source language level, too: C's "incomplete types",
2502 for example. So the proper cleanup, I think, would be to
2503 limit GDB's type smashing to match exactly those required
2504 by the source language. So GDB could have a
2505 "complete_this_type" function, but never create unnecessary
2506 copies of a type otherwise. */
2507 replace_type (type, xtype);
2508 TYPE_NAME (type) = NULL;
2509 TYPE_TAG_NAME (type) = NULL;
2513 TYPE_FLAGS (type) |= TYPE_FLAG_TARGET_STUB;
2514 TYPE_TARGET_TYPE (type) = xtype;
2519 /* In the following types, we must be sure to overwrite any existing
2520 type that the typenums refer to, rather than allocating a new one
2521 and making the typenums point to the new one. This is because there
2522 may already be pointers to the existing type (if it had been
2523 forward-referenced), and we must change it to a pointer, function,
2524 reference, or whatever, *in-place*. */
2526 case '*': /* Pointer to another type */
2527 type1 = read_type (pp, objfile);
2528 type = make_pointer_type (type1, dbx_lookup_type (typenums));
2531 case '&': /* Reference to another type */
2532 type1 = read_type (pp, objfile);
2533 type = make_reference_type (type1, dbx_lookup_type (typenums));
2536 case 'f': /* Function returning another type */
2537 type1 = read_type (pp, objfile);
2538 type = make_function_type (type1, dbx_lookup_type (typenums));
2541 case 'g': /* Prototyped function. (Sun) */
2543 /* Unresolved questions:
2545 - According to Sun's ``STABS Interface Manual'', for 'f'
2546 and 'F' symbol descriptors, a `0' in the argument type list
2547 indicates a varargs function. But it doesn't say how 'g'
2548 type descriptors represent that info. Someone with access
2549 to Sun's toolchain should try it out.
2551 - According to the comment in define_symbol (search for
2552 `process_prototype_types:'), Sun emits integer arguments as
2553 types which ref themselves --- like `void' types. Do we
2554 have to deal with that here, too? Again, someone with
2555 access to Sun's toolchain should try it out and let us
2558 const char *type_start = (*pp) - 1;
2559 struct type *return_type = read_type (pp, objfile);
2560 struct type *func_type
2561 = make_function_type (return_type, dbx_lookup_type (typenums));
2564 struct type_list *next;
2568 while (**pp && **pp != '#')
2570 struct type *arg_type = read_type (pp, objfile);
2571 struct type_list *new = alloca (sizeof (*new));
2572 new->type = arg_type;
2573 new->next = arg_types;
2581 complaint (&symfile_complaints,
2582 "Prototyped function type didn't end arguments with `#':\n%s",
2586 /* If there is just one argument whose type is `void', then
2587 that's just an empty argument list. */
2589 && ! arg_types->next
2590 && TYPE_CODE (arg_types->type) == TYPE_CODE_VOID)
2593 TYPE_FIELDS (func_type)
2594 = (struct field *) TYPE_ALLOC (func_type,
2595 num_args * sizeof (struct field));
2596 memset (TYPE_FIELDS (func_type), 0, num_args * sizeof (struct field));
2599 struct type_list *t;
2601 /* We stuck each argument type onto the front of the list
2602 when we read it, so the list is reversed. Build the
2603 fields array right-to-left. */
2604 for (t = arg_types, i = num_args - 1; t; t = t->next, i--)
2605 TYPE_FIELD_TYPE (func_type, i) = t->type;
2607 TYPE_NFIELDS (func_type) = num_args;
2608 TYPE_FLAGS (func_type) |= TYPE_FLAG_PROTOTYPED;
2614 case 'k': /* Const qualifier on some type (Sun) */
2615 type = read_type (pp, objfile);
2616 type = make_cv_type (1, TYPE_VOLATILE (type), type,
2617 dbx_lookup_type (typenums));
2620 case 'B': /* Volatile qual on some type (Sun) */
2621 type = read_type (pp, objfile);
2622 type = make_cv_type (TYPE_CONST (type), 1, type,
2623 dbx_lookup_type (typenums));
2627 if (isdigit (**pp) || **pp == '(' || **pp == '-')
2628 { /* Member (class & variable) type */
2629 /* FIXME -- we should be doing smash_to_XXX types here. */
2631 struct type *domain = read_type (pp, objfile);
2632 struct type *memtype;
2635 /* Invalid member type data format. */
2636 return error_type (pp, objfile);
2639 memtype = read_type (pp, objfile);
2640 type = dbx_alloc_type (typenums, objfile);
2641 smash_to_member_type (type, domain, memtype);
2644 /* type attribute */
2647 /* Skip to the semicolon. */
2648 while (**pp != ';' && **pp != '\0')
2651 return error_type (pp, objfile);
2653 ++ * pp; /* Skip the semicolon. */
2657 case 's': /* Size attribute */
2658 type_size = atoi (attr + 1);
2663 case 'S': /* String attribute */
2664 /* FIXME: check to see if following type is array? */
2668 case 'V': /* Vector attribute */
2669 /* FIXME: check to see if following type is array? */
2674 /* Ignore unrecognized type attributes, so future compilers
2675 can invent new ones. */
2683 case '#': /* Method (class & fn) type */
2684 if ((*pp)[0] == '#')
2686 /* We'll get the parameter types from the name. */
2687 struct type *return_type;
2690 return_type = read_type (pp, objfile);
2691 if (*(*pp)++ != ';')
2692 complaint (&symfile_complaints,
2693 "invalid (minimal) member type data format at symtab pos %d.",
2695 type = allocate_stub_method (return_type);
2696 if (typenums[0] != -1)
2697 *dbx_lookup_type (typenums) = type;
2701 struct type *domain = read_type (pp, objfile);
2702 struct type *return_type;
2707 /* Invalid member type data format. */
2708 return error_type (pp, objfile);
2712 return_type = read_type (pp, objfile);
2713 args = read_args (pp, ';', objfile, &nargs, &varargs);
2714 type = dbx_alloc_type (typenums, objfile);
2715 smash_to_method_type (type, domain, return_type, args,
2720 case 'r': /* Range type */
2721 type = read_range_type (pp, typenums, objfile);
2722 if (typenums[0] != -1)
2723 *dbx_lookup_type (typenums) = type;
2728 /* Sun ACC builtin int type */
2729 type = read_sun_builtin_type (pp, typenums, objfile);
2730 if (typenums[0] != -1)
2731 *dbx_lookup_type (typenums) = type;
2735 case 'R': /* Sun ACC builtin float type */
2736 type = read_sun_floating_type (pp, typenums, objfile);
2737 if (typenums[0] != -1)
2738 *dbx_lookup_type (typenums) = type;
2741 case 'e': /* Enumeration type */
2742 type = dbx_alloc_type (typenums, objfile);
2743 type = read_enum_type (pp, type, objfile);
2744 if (typenums[0] != -1)
2745 *dbx_lookup_type (typenums) = type;
2748 case 's': /* Struct type */
2749 case 'u': /* Union type */
2751 enum type_code type_code = TYPE_CODE_UNDEF;
2752 type = dbx_alloc_type (typenums, objfile);
2753 switch (type_descriptor)
2756 type_code = TYPE_CODE_STRUCT;
2759 type_code = TYPE_CODE_UNION;
2762 type = read_struct_type (pp, type, type_code, objfile);
2766 case 'a': /* Array type */
2768 return error_type (pp, objfile);
2771 type = dbx_alloc_type (typenums, objfile);
2772 type = read_array_type (pp, type, objfile);
2774 TYPE_CODE (type) = TYPE_CODE_STRING;
2776 TYPE_FLAGS (type) |= TYPE_FLAG_VECTOR;
2779 case 'S': /* Set or bitstring type */
2780 type1 = read_type (pp, objfile);
2781 type = create_set_type ((struct type *) NULL, type1);
2783 TYPE_CODE (type) = TYPE_CODE_BITSTRING;
2784 if (typenums[0] != -1)
2785 *dbx_lookup_type (typenums) = type;
2789 --*pp; /* Go back to the symbol in error */
2790 /* Particularly important if it was \0! */
2791 return error_type (pp, objfile);
2796 warning ("GDB internal error, type is NULL in stabsread.c\n");
2797 return error_type (pp, objfile);
2800 /* Size specified in a type attribute overrides any other size. */
2801 if (type_size != -1)
2802 TYPE_LENGTH (type) = (type_size + TARGET_CHAR_BIT - 1) / TARGET_CHAR_BIT;
2807 /* RS/6000 xlc/dbx combination uses a set of builtin types, starting from -1.
2808 Return the proper type node for a given builtin type number. */
2810 static struct type *
2811 rs6000_builtin_type (int typenum)
2813 /* We recognize types numbered from -NUMBER_RECOGNIZED to -1. */
2814 #define NUMBER_RECOGNIZED 34
2815 /* This includes an empty slot for type number -0. */
2816 static struct type *negative_types[NUMBER_RECOGNIZED + 1];
2817 struct type *rettype = NULL;
2819 if (typenum >= 0 || typenum < -NUMBER_RECOGNIZED)
2821 complaint (&symfile_complaints, "Unknown builtin type %d", typenum);
2822 return builtin_type_error;
2824 if (negative_types[-typenum] != NULL)
2825 return negative_types[-typenum];
2827 #if TARGET_CHAR_BIT != 8
2828 #error This code wrong for TARGET_CHAR_BIT not 8
2829 /* These definitions all assume that TARGET_CHAR_BIT is 8. I think
2830 that if that ever becomes not true, the correct fix will be to
2831 make the size in the struct type to be in bits, not in units of
2838 /* The size of this and all the other types are fixed, defined
2839 by the debugging format. If there is a type called "int" which
2840 is other than 32 bits, then it should use a new negative type
2841 number (or avoid negative type numbers for that case).
2842 See stabs.texinfo. */
2843 rettype = init_type (TYPE_CODE_INT, 4, 0, "int", NULL);
2846 rettype = init_type (TYPE_CODE_INT, 1, 0, "char", NULL);
2849 rettype = init_type (TYPE_CODE_INT, 2, 0, "short", NULL);
2852 rettype = init_type (TYPE_CODE_INT, 4, 0, "long", NULL);
2855 rettype = init_type (TYPE_CODE_INT, 1, TYPE_FLAG_UNSIGNED,
2856 "unsigned char", NULL);
2859 rettype = init_type (TYPE_CODE_INT, 1, 0, "signed char", NULL);
2862 rettype = init_type (TYPE_CODE_INT, 2, TYPE_FLAG_UNSIGNED,
2863 "unsigned short", NULL);
2866 rettype = init_type (TYPE_CODE_INT, 4, TYPE_FLAG_UNSIGNED,
2867 "unsigned int", NULL);
2870 rettype = init_type (TYPE_CODE_INT, 4, TYPE_FLAG_UNSIGNED,
2873 rettype = init_type (TYPE_CODE_INT, 4, TYPE_FLAG_UNSIGNED,
2874 "unsigned long", NULL);
2877 rettype = init_type (TYPE_CODE_VOID, 1, 0, "void", NULL);
2880 /* IEEE single precision (32 bit). */
2881 rettype = init_type (TYPE_CODE_FLT, 4, 0, "float", NULL);
2884 /* IEEE double precision (64 bit). */
2885 rettype = init_type (TYPE_CODE_FLT, 8, 0, "double", NULL);
2888 /* This is an IEEE double on the RS/6000, and different machines with
2889 different sizes for "long double" should use different negative
2890 type numbers. See stabs.texinfo. */
2891 rettype = init_type (TYPE_CODE_FLT, 8, 0, "long double", NULL);
2894 rettype = init_type (TYPE_CODE_INT, 4, 0, "integer", NULL);
2897 rettype = init_type (TYPE_CODE_BOOL, 4, TYPE_FLAG_UNSIGNED,
2901 rettype = init_type (TYPE_CODE_FLT, 4, 0, "short real", NULL);
2904 rettype = init_type (TYPE_CODE_FLT, 8, 0, "real", NULL);
2907 rettype = init_type (TYPE_CODE_ERROR, 0, 0, "stringptr", NULL);
2910 rettype = init_type (TYPE_CODE_CHAR, 1, TYPE_FLAG_UNSIGNED,
2914 rettype = init_type (TYPE_CODE_BOOL, 1, TYPE_FLAG_UNSIGNED,
2918 rettype = init_type (TYPE_CODE_BOOL, 2, TYPE_FLAG_UNSIGNED,
2922 rettype = init_type (TYPE_CODE_BOOL, 4, TYPE_FLAG_UNSIGNED,
2926 rettype = init_type (TYPE_CODE_BOOL, 4, TYPE_FLAG_UNSIGNED,
2930 /* Complex type consisting of two IEEE single precision values. */
2931 rettype = init_type (TYPE_CODE_COMPLEX, 8, 0, "complex", NULL);
2932 TYPE_TARGET_TYPE (rettype) = init_type (TYPE_CODE_FLT, 4, 0, "float",
2936 /* Complex type consisting of two IEEE double precision values. */
2937 rettype = init_type (TYPE_CODE_COMPLEX, 16, 0, "double complex", NULL);
2938 TYPE_TARGET_TYPE (rettype) = init_type (TYPE_CODE_FLT, 8, 0, "double",
2942 rettype = init_type (TYPE_CODE_INT, 1, 0, "integer*1", NULL);
2945 rettype = init_type (TYPE_CODE_INT, 2, 0, "integer*2", NULL);
2948 rettype = init_type (TYPE_CODE_INT, 4, 0, "integer*4", NULL);
2951 rettype = init_type (TYPE_CODE_CHAR, 2, 0, "wchar", NULL);
2954 rettype = init_type (TYPE_CODE_INT, 8, 0, "long long", NULL);
2957 rettype = init_type (TYPE_CODE_INT, 8, TYPE_FLAG_UNSIGNED,
2958 "unsigned long long", NULL);
2961 rettype = init_type (TYPE_CODE_INT, 8, TYPE_FLAG_UNSIGNED,
2965 rettype = init_type (TYPE_CODE_INT, 8, 0, "integer*8", NULL);
2968 negative_types[-typenum] = rettype;
2972 /* This page contains subroutines of read_type. */
2974 /* Replace *OLD_NAME with the method name portion of PHYSNAME. */
2977 update_method_name_from_physname (char **old_name, char *physname)
2981 method_name = method_name_from_physname (physname);
2983 if (method_name == NULL)
2984 error ("bad physname %s\n", physname);
2986 if (strcmp (*old_name, method_name) != 0)
2989 *old_name = method_name;
2992 xfree (method_name);
2995 /* Read member function stabs info for C++ classes. The form of each member
2998 NAME :: TYPENUM[=type definition] ARGS : PHYSNAME ;
3000 An example with two member functions is:
3002 afunc1::20=##15;:i;2A.;afunc2::20:i;2A.;
3004 For the case of overloaded operators, the format is op$::*.funcs, where
3005 $ is the CPLUS_MARKER (usually '$'), `*' holds the place for an operator
3006 name (such as `+=') and `.' marks the end of the operator name.
3008 Returns 1 for success, 0 for failure. */
3011 read_member_functions (struct field_info *fip, char **pp, struct type *type,
3012 struct objfile *objfile)
3016 /* Total number of member functions defined in this class. If the class
3017 defines two `f' functions, and one `g' function, then this will have
3019 int total_length = 0;
3023 struct next_fnfield *next;
3024 struct fn_field fn_field;
3027 struct type *look_ahead_type;
3028 struct next_fnfieldlist *new_fnlist;
3029 struct next_fnfield *new_sublist;
3033 /* Process each list until we find something that is not a member function
3034 or find the end of the functions. */
3038 /* We should be positioned at the start of the function name.
3039 Scan forward to find the first ':' and if it is not the
3040 first of a "::" delimiter, then this is not a member function. */
3052 look_ahead_type = NULL;
3055 new_fnlist = (struct next_fnfieldlist *)
3056 xmalloc (sizeof (struct next_fnfieldlist));
3057 make_cleanup (xfree, new_fnlist);
3058 memset (new_fnlist, 0, sizeof (struct next_fnfieldlist));
3060 if ((*pp)[0] == 'o' && (*pp)[1] == 'p' && is_cplus_marker ((*pp)[2]))
3062 /* This is a completely wierd case. In order to stuff in the
3063 names that might contain colons (the usual name delimiter),
3064 Mike Tiemann defined a different name format which is
3065 signalled if the identifier is "op$". In that case, the
3066 format is "op$::XXXX." where XXXX is the name. This is
3067 used for names like "+" or "=". YUUUUUUUK! FIXME! */
3068 /* This lets the user type "break operator+".
3069 We could just put in "+" as the name, but that wouldn't
3071 static char opname[32] = "op$";
3072 char *o = opname + 3;
3074 /* Skip past '::'. */
3077 STABS_CONTINUE (pp, objfile);
3083 main_fn_name = savestring (opname, o - opname);
3089 main_fn_name = savestring (*pp, p - *pp);
3090 /* Skip past '::'. */
3093 new_fnlist->fn_fieldlist.name = main_fn_name;
3098 (struct next_fnfield *) xmalloc (sizeof (struct next_fnfield));
3099 make_cleanup (xfree, new_sublist);
3100 memset (new_sublist, 0, sizeof (struct next_fnfield));
3102 /* Check for and handle cretinous dbx symbol name continuation! */
3103 if (look_ahead_type == NULL)
3106 STABS_CONTINUE (pp, objfile);
3108 new_sublist->fn_field.type = read_type (pp, objfile);
3111 /* Invalid symtab info for member function. */
3117 /* g++ version 1 kludge */
3118 new_sublist->fn_field.type = look_ahead_type;
3119 look_ahead_type = NULL;
3129 /* If this is just a stub, then we don't have the real name here. */
3131 if (TYPE_STUB (new_sublist->fn_field.type))
3133 if (!TYPE_DOMAIN_TYPE (new_sublist->fn_field.type))
3134 TYPE_DOMAIN_TYPE (new_sublist->fn_field.type) = type;
3135 new_sublist->fn_field.is_stub = 1;
3137 new_sublist->fn_field.physname = savestring (*pp, p - *pp);
3140 /* Set this member function's visibility fields. */
3143 case VISIBILITY_PRIVATE:
3144 new_sublist->fn_field.is_private = 1;
3146 case VISIBILITY_PROTECTED:
3147 new_sublist->fn_field.is_protected = 1;
3151 STABS_CONTINUE (pp, objfile);
3154 case 'A': /* Normal functions. */
3155 new_sublist->fn_field.is_const = 0;
3156 new_sublist->fn_field.is_volatile = 0;
3159 case 'B': /* `const' member functions. */
3160 new_sublist->fn_field.is_const = 1;
3161 new_sublist->fn_field.is_volatile = 0;
3164 case 'C': /* `volatile' member function. */
3165 new_sublist->fn_field.is_const = 0;
3166 new_sublist->fn_field.is_volatile = 1;
3169 case 'D': /* `const volatile' member function. */
3170 new_sublist->fn_field.is_const = 1;
3171 new_sublist->fn_field.is_volatile = 1;
3174 case '*': /* File compiled with g++ version 1 -- no info */
3179 complaint (&symfile_complaints,
3180 "const/volatile indicator missing, got '%c'", **pp);
3189 /* virtual member function, followed by index.
3190 The sign bit is set to distinguish pointers-to-methods
3191 from virtual function indicies. Since the array is
3192 in words, the quantity must be shifted left by 1
3193 on 16 bit machine, and by 2 on 32 bit machine, forcing
3194 the sign bit out, and usable as a valid index into
3195 the array. Remove the sign bit here. */
3196 new_sublist->fn_field.voffset =
3197 (0x7fffffff & read_huge_number (pp, ';', &nbits)) + 2;
3201 STABS_CONTINUE (pp, objfile);
3202 if (**pp == ';' || **pp == '\0')
3204 /* Must be g++ version 1. */
3205 new_sublist->fn_field.fcontext = 0;
3209 /* Figure out from whence this virtual function came.
3210 It may belong to virtual function table of
3211 one of its baseclasses. */
3212 look_ahead_type = read_type (pp, objfile);
3215 /* g++ version 1 overloaded methods. */
3219 new_sublist->fn_field.fcontext = look_ahead_type;
3228 look_ahead_type = NULL;
3234 /* static member function. */
3236 int slen = strlen (main_fn_name);
3238 new_sublist->fn_field.voffset = VOFFSET_STATIC;
3240 /* For static member functions, we can't tell if they
3241 are stubbed, as they are put out as functions, and not as
3243 GCC v2 emits the fully mangled name if
3244 dbxout.c:flag_minimal_debug is not set, so we have to
3245 detect a fully mangled physname here and set is_stub
3246 accordingly. Fully mangled physnames in v2 start with
3247 the member function name, followed by two underscores.
3248 GCC v3 currently always emits stubbed member functions,
3249 but with fully mangled physnames, which start with _Z. */
3250 if (!(strncmp (new_sublist->fn_field.physname,
3251 main_fn_name, slen) == 0
3252 && new_sublist->fn_field.physname[slen] == '_'
3253 && new_sublist->fn_field.physname[slen + 1] == '_'))
3255 new_sublist->fn_field.is_stub = 1;
3262 complaint (&symfile_complaints,
3263 "member function type missing, got '%c'", (*pp)[-1]);
3264 /* Fall through into normal member function. */
3267 /* normal member function. */
3268 new_sublist->fn_field.voffset = 0;
3269 new_sublist->fn_field.fcontext = 0;
3273 new_sublist->next = sublist;
3274 sublist = new_sublist;
3276 STABS_CONTINUE (pp, objfile);
3278 while (**pp != ';' && **pp != '\0');
3281 STABS_CONTINUE (pp, objfile);
3283 /* Skip GCC 3.X member functions which are duplicates of the callable
3284 constructor/destructor. */
3285 if (strcmp (main_fn_name, "__base_ctor") == 0
3286 || strcmp (main_fn_name, "__base_dtor") == 0
3287 || strcmp (main_fn_name, "__deleting_dtor") == 0)
3289 xfree (main_fn_name);
3294 int has_destructor = 0, has_other = 0;
3296 struct next_fnfield *tmp_sublist;
3298 /* Various versions of GCC emit various mostly-useless
3299 strings in the name field for special member functions.
3301 For stub methods, we need to defer correcting the name
3302 until we are ready to unstub the method, because the current
3303 name string is used by gdb_mangle_name. The only stub methods
3304 of concern here are GNU v2 operators; other methods have their
3305 names correct (see caveat below).
3307 For non-stub methods, in GNU v3, we have a complete physname.
3308 Therefore we can safely correct the name now. This primarily
3309 affects constructors and destructors, whose name will be
3310 __comp_ctor or __comp_dtor instead of Foo or ~Foo. Cast
3311 operators will also have incorrect names; for instance,
3312 "operator int" will be named "operator i" (i.e. the type is
3315 For non-stub methods in GNU v2, we have no easy way to
3316 know if we have a complete physname or not. For most
3317 methods the result depends on the platform (if CPLUS_MARKER
3318 can be `$' or `.', it will use minimal debug information, or
3319 otherwise the full physname will be included).
3321 Rather than dealing with this, we take a different approach.
3322 For v3 mangled names, we can use the full physname; for v2,
3323 we use cplus_demangle_opname (which is actually v2 specific),
3324 because the only interesting names are all operators - once again
3325 barring the caveat below. Skip this process if any method in the
3326 group is a stub, to prevent our fouling up the workings of
3329 The caveat: GCC 2.95.x (and earlier?) put constructors and
3330 destructors in the same method group. We need to split this
3331 into two groups, because they should have different names.
3332 So for each method group we check whether it contains both
3333 routines whose physname appears to be a destructor (the physnames
3334 for and destructors are always provided, due to quirks in v2
3335 mangling) and routines whose physname does not appear to be a
3336 destructor. If so then we break up the list into two halves.
3337 Even if the constructors and destructors aren't in the same group
3338 the destructor will still lack the leading tilde, so that also
3341 So, to summarize what we expect and handle here:
3343 Given Given Real Real Action
3344 method name physname physname method name
3346 __opi [none] __opi__3Foo operator int opname
3348 Foo _._3Foo _._3Foo ~Foo separate and
3350 operator i _ZN3FoocviEv _ZN3FoocviEv operator int demangle
3351 __comp_ctor _ZN3FooC1ERKS_ _ZN3FooC1ERKS_ Foo demangle
3354 tmp_sublist = sublist;
3355 while (tmp_sublist != NULL)
3357 if (tmp_sublist->fn_field.is_stub)
3359 if (tmp_sublist->fn_field.physname[0] == '_'
3360 && tmp_sublist->fn_field.physname[1] == 'Z')
3363 if (is_destructor_name (tmp_sublist->fn_field.physname))
3368 tmp_sublist = tmp_sublist->next;
3371 if (has_destructor && has_other)
3373 struct next_fnfieldlist *destr_fnlist;
3374 struct next_fnfield *last_sublist;
3376 /* Create a new fn_fieldlist for the destructors. */
3378 destr_fnlist = (struct next_fnfieldlist *)
3379 xmalloc (sizeof (struct next_fnfieldlist));
3380 make_cleanup (xfree, destr_fnlist);
3381 memset (destr_fnlist, 0, sizeof (struct next_fnfieldlist));
3382 destr_fnlist->fn_fieldlist.name
3383 = obconcat (&objfile->type_obstack, "", "~",
3384 new_fnlist->fn_fieldlist.name);
3386 destr_fnlist->fn_fieldlist.fn_fields = (struct fn_field *)
3387 obstack_alloc (&objfile->type_obstack,
3388 sizeof (struct fn_field) * has_destructor);
3389 memset (destr_fnlist->fn_fieldlist.fn_fields, 0,
3390 sizeof (struct fn_field) * has_destructor);
3391 tmp_sublist = sublist;
3392 last_sublist = NULL;
3394 while (tmp_sublist != NULL)
3396 if (!is_destructor_name (tmp_sublist->fn_field.physname))
3398 tmp_sublist = tmp_sublist->next;
3402 destr_fnlist->fn_fieldlist.fn_fields[i++]
3403 = tmp_sublist->fn_field;
3405 last_sublist->next = tmp_sublist->next;
3407 sublist = tmp_sublist->next;
3408 last_sublist = tmp_sublist;
3409 tmp_sublist = tmp_sublist->next;
3412 destr_fnlist->fn_fieldlist.length = has_destructor;
3413 destr_fnlist->next = fip->fnlist;
3414 fip->fnlist = destr_fnlist;
3416 total_length += has_destructor;
3417 length -= has_destructor;
3421 /* v3 mangling prevents the use of abbreviated physnames,
3422 so we can do this here. There are stubbed methods in v3
3424 - in -gstabs instead of -gstabs+
3425 - or for static methods, which are output as a function type
3426 instead of a method type. */
3428 update_method_name_from_physname (&new_fnlist->fn_fieldlist.name,
3429 sublist->fn_field.physname);
3431 else if (has_destructor && new_fnlist->fn_fieldlist.name[0] != '~')
3433 new_fnlist->fn_fieldlist.name = concat ("~", main_fn_name, NULL);
3434 xfree (main_fn_name);
3438 char dem_opname[256];
3440 ret = cplus_demangle_opname (new_fnlist->fn_fieldlist.name,
3441 dem_opname, DMGL_ANSI);
3443 ret = cplus_demangle_opname (new_fnlist->fn_fieldlist.name,
3446 new_fnlist->fn_fieldlist.name
3447 = obsavestring (dem_opname, strlen (dem_opname),
3448 &objfile->type_obstack);
3451 new_fnlist->fn_fieldlist.fn_fields = (struct fn_field *)
3452 obstack_alloc (&objfile->type_obstack,
3453 sizeof (struct fn_field) * length);
3454 memset (new_fnlist->fn_fieldlist.fn_fields, 0,
3455 sizeof (struct fn_field) * length);
3456 for (i = length; (i--, sublist); sublist = sublist->next)
3458 new_fnlist->fn_fieldlist.fn_fields[i] = sublist->fn_field;
3461 new_fnlist->fn_fieldlist.length = length;
3462 new_fnlist->next = fip->fnlist;
3463 fip->fnlist = new_fnlist;
3465 total_length += length;
3471 ALLOCATE_CPLUS_STRUCT_TYPE (type);
3472 TYPE_FN_FIELDLISTS (type) = (struct fn_fieldlist *)
3473 TYPE_ALLOC (type, sizeof (struct fn_fieldlist) * nfn_fields);
3474 memset (TYPE_FN_FIELDLISTS (type), 0,
3475 sizeof (struct fn_fieldlist) * nfn_fields);
3476 TYPE_NFN_FIELDS (type) = nfn_fields;
3477 TYPE_NFN_FIELDS_TOTAL (type) = total_length;
3483 /* Special GNU C++ name.
3485 Returns 1 for success, 0 for failure. "failure" means that we can't
3486 keep parsing and it's time for error_type(). */
3489 read_cpp_abbrev (struct field_info *fip, char **pp, struct type *type,
3490 struct objfile *objfile)
3495 struct type *context;
3505 /* At this point, *pp points to something like "22:23=*22...",
3506 where the type number before the ':' is the "context" and
3507 everything after is a regular type definition. Lookup the
3508 type, find it's name, and construct the field name. */
3510 context = read_type (pp, objfile);
3514 case 'f': /* $vf -- a virtual function table pointer */
3515 name = type_name_no_tag (context);
3520 fip->list->field.name =
3521 obconcat (&objfile->type_obstack, vptr_name, name, "");
3524 case 'b': /* $vb -- a virtual bsomethingorother */
3525 name = type_name_no_tag (context);
3528 complaint (&symfile_complaints,
3529 "C++ abbreviated type name unknown at symtab pos %d",
3533 fip->list->field.name =
3534 obconcat (&objfile->type_obstack, vb_name, name, "");
3538 invalid_cpp_abbrev_complaint (*pp);
3539 fip->list->field.name =
3540 obconcat (&objfile->type_obstack,
3541 "INVALID_CPLUSPLUS_ABBREV", "", "");
3545 /* At this point, *pp points to the ':'. Skip it and read the
3551 invalid_cpp_abbrev_complaint (*pp);
3554 fip->list->field.type = read_type (pp, objfile);
3556 (*pp)++; /* Skip the comma. */
3562 FIELD_BITPOS (fip->list->field) = read_huge_number (pp, ';', &nbits);
3566 /* This field is unpacked. */
3567 FIELD_BITSIZE (fip->list->field) = 0;
3568 fip->list->visibility = VISIBILITY_PRIVATE;
3572 invalid_cpp_abbrev_complaint (*pp);
3573 /* We have no idea what syntax an unrecognized abbrev would have, so
3574 better return 0. If we returned 1, we would need to at least advance
3575 *pp to avoid an infinite loop. */
3582 read_one_struct_field (struct field_info *fip, char **pp, char *p,
3583 struct type *type, struct objfile *objfile)
3585 /* The following is code to work around cfront generated stabs.
3586 The stabs contains full mangled name for each field.
3587 We try to demangle the name and extract the field name out of it.
3589 if (ARM_DEMANGLING && current_subfile->language == language_cplus)
3595 dem = cplus_demangle (*pp, DMGL_ANSI | DMGL_PARAMS);
3598 dem_p = strrchr (dem, ':');
3599 if (dem_p != 0 && *(dem_p - 1) == ':')
3601 FIELD_NAME (fip->list->field) =
3602 obsavestring (dem_p, strlen (dem_p), &objfile->type_obstack);
3606 FIELD_NAME (fip->list->field) =
3607 obsavestring (*pp, p - *pp, &objfile->type_obstack);
3611 /* end of code for cfront work around */
3614 fip->list->field.name =
3615 obsavestring (*pp, p - *pp, &objfile->type_obstack);
3618 /* This means we have a visibility for a field coming. */
3622 fip->list->visibility = *(*pp)++;
3626 /* normal dbx-style format, no explicit visibility */
3627 fip->list->visibility = VISIBILITY_PUBLIC;
3630 fip->list->field.type = read_type (pp, objfile);
3635 /* Possible future hook for nested types. */
3638 fip->list->field.bitpos = (long) -2; /* nested type */
3648 /* Static class member. */
3649 SET_FIELD_PHYSNAME (fip->list->field, savestring (*pp, p - *pp));
3653 else if (**pp != ',')
3655 /* Bad structure-type format. */
3656 stabs_general_complaint ("bad structure-type format");
3660 (*pp)++; /* Skip the comma. */
3664 FIELD_BITPOS (fip->list->field) = read_huge_number (pp, ',', &nbits);
3667 stabs_general_complaint ("bad structure-type format");
3670 FIELD_BITSIZE (fip->list->field) = read_huge_number (pp, ';', &nbits);
3673 stabs_general_complaint ("bad structure-type format");
3678 if (FIELD_BITPOS (fip->list->field) == 0
3679 && FIELD_BITSIZE (fip->list->field) == 0)
3681 /* This can happen in two cases: (1) at least for gcc 2.4.5 or so,
3682 it is a field which has been optimized out. The correct stab for
3683 this case is to use VISIBILITY_IGNORE, but that is a recent
3684 invention. (2) It is a 0-size array. For example
3685 union { int num; char str[0]; } foo. Printing "<no value>" for
3686 str in "p foo" is OK, since foo.str (and thus foo.str[3])
3687 will continue to work, and a 0-size array as a whole doesn't
3688 have any contents to print.
3690 I suspect this probably could also happen with gcc -gstabs (not
3691 -gstabs+) for static fields, and perhaps other C++ extensions.
3692 Hopefully few people use -gstabs with gdb, since it is intended
3693 for dbx compatibility. */
3695 /* Ignore this field. */
3696 fip->list->visibility = VISIBILITY_IGNORE;
3700 /* Detect an unpacked field and mark it as such.
3701 dbx gives a bit size for all fields.
3702 Note that forward refs cannot be packed,
3703 and treat enums as if they had the width of ints. */
3705 struct type *field_type = check_typedef (FIELD_TYPE (fip->list->field));
3707 if (TYPE_CODE (field_type) != TYPE_CODE_INT
3708 && TYPE_CODE (field_type) != TYPE_CODE_RANGE
3709 && TYPE_CODE (field_type) != TYPE_CODE_BOOL
3710 && TYPE_CODE (field_type) != TYPE_CODE_ENUM)
3712 FIELD_BITSIZE (fip->list->field) = 0;
3714 if ((FIELD_BITSIZE (fip->list->field)
3715 == TARGET_CHAR_BIT * TYPE_LENGTH (field_type)
3716 || (TYPE_CODE (field_type) == TYPE_CODE_ENUM
3717 && FIELD_BITSIZE (fip->list->field) == TARGET_INT_BIT)
3720 FIELD_BITPOS (fip->list->field) % 8 == 0)
3722 FIELD_BITSIZE (fip->list->field) = 0;
3728 /* Read struct or class data fields. They have the form:
3730 NAME : [VISIBILITY] TYPENUM , BITPOS , BITSIZE ;
3732 At the end, we see a semicolon instead of a field.
3734 In C++, this may wind up being NAME:?TYPENUM:PHYSNAME; for
3737 The optional VISIBILITY is one of:
3739 '/0' (VISIBILITY_PRIVATE)
3740 '/1' (VISIBILITY_PROTECTED)
3741 '/2' (VISIBILITY_PUBLIC)
3742 '/9' (VISIBILITY_IGNORE)
3744 or nothing, for C style fields with public visibility.
3746 Returns 1 for success, 0 for failure. */
3749 read_struct_fields (struct field_info *fip, char **pp, struct type *type,
3750 struct objfile *objfile)
3753 struct nextfield *new;
3755 /* We better set p right now, in case there are no fields at all... */
3759 /* Read each data member type until we find the terminating ';' at the end of
3760 the data member list, or break for some other reason such as finding the
3761 start of the member function list. */
3762 /* Stab string for structure/union does not end with two ';' in
3763 SUN C compiler 5.3 i.e. F6U2, hence check for end of string. */
3765 while (**pp != ';' && **pp != '\0')
3767 STABS_CONTINUE (pp, objfile);
3768 /* Get space to record the next field's data. */
3769 new = (struct nextfield *) xmalloc (sizeof (struct nextfield));
3770 make_cleanup (xfree, new);
3771 memset (new, 0, sizeof (struct nextfield));
3772 new->next = fip->list;
3775 /* Get the field name. */
3778 /* If is starts with CPLUS_MARKER it is a special abbreviation,
3779 unless the CPLUS_MARKER is followed by an underscore, in
3780 which case it is just the name of an anonymous type, which we
3781 should handle like any other type name. */
3783 if (is_cplus_marker (p[0]) && p[1] != '_')
3785 if (!read_cpp_abbrev (fip, pp, type, objfile))
3790 /* Look for the ':' that separates the field name from the field
3791 values. Data members are delimited by a single ':', while member
3792 functions are delimited by a pair of ':'s. When we hit the member
3793 functions (if any), terminate scan loop and return. */
3795 while (*p != ':' && *p != '\0')
3802 /* Check to see if we have hit the member functions yet. */
3807 read_one_struct_field (fip, pp, p, type, objfile);
3809 if (p[0] == ':' && p[1] == ':')
3811 /* (the deleted) chill the list of fields: the last entry (at
3812 the head) is a partially constructed entry which we now
3814 fip->list = fip->list->next;
3819 /* The stabs for C++ derived classes contain baseclass information which
3820 is marked by a '!' character after the total size. This function is
3821 called when we encounter the baseclass marker, and slurps up all the
3822 baseclass information.
3824 Immediately following the '!' marker is the number of base classes that
3825 the class is derived from, followed by information for each base class.
3826 For each base class, there are two visibility specifiers, a bit offset
3827 to the base class information within the derived class, a reference to
3828 the type for the base class, and a terminating semicolon.
3830 A typical example, with two base classes, would be "!2,020,19;0264,21;".
3832 Baseclass information marker __________________|| | | | | | |
3833 Number of baseclasses __________________________| | | | | | |
3834 Visibility specifiers (2) ________________________| | | | | |
3835 Offset in bits from start of class _________________| | | | |
3836 Type number for base class ___________________________| | | |
3837 Visibility specifiers (2) _______________________________| | |
3838 Offset in bits from start of class ________________________| |
3839 Type number of base class ____________________________________|
3841 Return 1 for success, 0 for (error-type-inducing) failure. */
3847 read_baseclasses (struct field_info *fip, char **pp, struct type *type,
3848 struct objfile *objfile)
3851 struct nextfield *new;
3859 /* Skip the '!' baseclass information marker. */
3863 ALLOCATE_CPLUS_STRUCT_TYPE (type);
3866 TYPE_N_BASECLASSES (type) = read_huge_number (pp, ',', &nbits);
3872 /* Some stupid compilers have trouble with the following, so break
3873 it up into simpler expressions. */
3874 TYPE_FIELD_VIRTUAL_BITS (type) = (B_TYPE *)
3875 TYPE_ALLOC (type, B_BYTES (TYPE_N_BASECLASSES (type)));
3878 int num_bytes = B_BYTES (TYPE_N_BASECLASSES (type));
3881 pointer = (char *) TYPE_ALLOC (type, num_bytes);
3882 TYPE_FIELD_VIRTUAL_BITS (type) = (B_TYPE *) pointer;
3886 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type), TYPE_N_BASECLASSES (type));
3888 for (i = 0; i < TYPE_N_BASECLASSES (type); i++)
3890 new = (struct nextfield *) xmalloc (sizeof (struct nextfield));
3891 make_cleanup (xfree, new);
3892 memset (new, 0, sizeof (struct nextfield));
3893 new->next = fip->list;
3895 FIELD_BITSIZE (new->field) = 0; /* this should be an unpacked field! */
3897 STABS_CONTINUE (pp, objfile);
3901 /* Nothing to do. */
3904 SET_TYPE_FIELD_VIRTUAL (type, i);
3907 /* Unknown character. Complain and treat it as non-virtual. */
3909 complaint (&symfile_complaints,
3910 "Unknown virtual character `%c' for baseclass", **pp);
3915 new->visibility = *(*pp)++;
3916 switch (new->visibility)
3918 case VISIBILITY_PRIVATE:
3919 case VISIBILITY_PROTECTED:
3920 case VISIBILITY_PUBLIC:
3923 /* Bad visibility format. Complain and treat it as
3926 complaint (&symfile_complaints,
3927 "Unknown visibility `%c' for baseclass",
3929 new->visibility = VISIBILITY_PUBLIC;
3936 /* The remaining value is the bit offset of the portion of the object
3937 corresponding to this baseclass. Always zero in the absence of
3938 multiple inheritance. */
3940 FIELD_BITPOS (new->field) = read_huge_number (pp, ',', &nbits);
3945 /* The last piece of baseclass information is the type of the
3946 base class. Read it, and remember it's type name as this
3949 new->field.type = read_type (pp, objfile);
3950 new->field.name = type_name_no_tag (new->field.type);
3952 /* skip trailing ';' and bump count of number of fields seen */
3961 /* The tail end of stabs for C++ classes that contain a virtual function
3962 pointer contains a tilde, a %, and a type number.
3963 The type number refers to the base class (possibly this class itself) which
3964 contains the vtable pointer for the current class.
3966 This function is called when we have parsed all the method declarations,
3967 so we can look for the vptr base class info. */
3970 read_tilde_fields (struct field_info *fip, char **pp, struct type *type,
3971 struct objfile *objfile)
3975 STABS_CONTINUE (pp, objfile);
3977 /* If we are positioned at a ';', then skip it. */
3987 if (**pp == '=' || **pp == '+' || **pp == '-')
3989 /* Obsolete flags that used to indicate the presence
3990 of constructors and/or destructors. */
3994 /* Read either a '%' or the final ';'. */
3995 if (*(*pp)++ == '%')
3997 /* The next number is the type number of the base class
3998 (possibly our own class) which supplies the vtable for
3999 this class. Parse it out, and search that class to find
4000 its vtable pointer, and install those into TYPE_VPTR_BASETYPE
4001 and TYPE_VPTR_FIELDNO. */
4006 t = read_type (pp, objfile);
4008 while (*p != '\0' && *p != ';')
4014 /* Premature end of symbol. */
4018 TYPE_VPTR_BASETYPE (type) = t;
4019 if (type == t) /* Our own class provides vtbl ptr */
4021 for (i = TYPE_NFIELDS (t) - 1;
4022 i >= TYPE_N_BASECLASSES (t);
4025 char *name = TYPE_FIELD_NAME (t, i);
4026 if (!strncmp (name, vptr_name, sizeof (vptr_name) - 2)
4027 && is_cplus_marker (name[sizeof (vptr_name) - 2]))
4029 TYPE_VPTR_FIELDNO (type) = i;
4033 /* Virtual function table field not found. */
4034 complaint (&symfile_complaints,
4035 "virtual function table pointer not found when defining class `%s'",
4041 TYPE_VPTR_FIELDNO (type) = TYPE_VPTR_FIELDNO (t);
4052 attach_fn_fields_to_type (struct field_info *fip, register struct type *type)
4056 for (n = TYPE_NFN_FIELDS (type);
4057 fip->fnlist != NULL;
4058 fip->fnlist = fip->fnlist->next)
4060 --n; /* Circumvent Sun3 compiler bug */
4061 TYPE_FN_FIELDLISTS (type)[n] = fip->fnlist->fn_fieldlist;
4066 /* read cfront class static data.
4067 pp points to string starting with the list of static data
4068 eg: A:ZcA;1@Bpub v2@Bvirpri;__ct__1AFv func__1AFv *sfunc__1AFv ;as__1A ;;
4071 A:ZcA;;foopri__1AFv foopro__1AFv __ct__1AFv __ct__1AFRC1A foopub__1AFv ;;;
4076 read_cfront_static_fields (struct field_info *fip, char **pp, struct type *type,
4077 struct objfile *objfile)
4079 struct nextfield *new;
4082 struct symbol *ref_static = 0;
4084 if (**pp == ';') /* no static data; return */
4090 /* Process each field in the list until we find the terminating ";" */
4092 /* eg: p = "as__1A ;;;" */
4093 STABS_CONTINUE (pp, objfile); /* handle \\ */
4094 while (**pp != ';' && (sname = get_substring (pp, ' '), sname))
4096 ref_static = lookup_symbol (sname, 0, VAR_NAMESPACE, 0, 0); /*demangled_name */
4099 complaint (&symfile_complaints,
4100 "Unable to find symbol for static data field %s", sname);
4103 stype = SYMBOL_TYPE (ref_static);
4105 /* allocate a new fip */
4106 new = (struct nextfield *) xmalloc (sizeof (struct nextfield));
4107 make_cleanup (xfree, new);
4108 memset (new, 0, sizeof (struct nextfield));
4109 new->next = fip->list;
4112 /* set visibility */
4113 /* FIXME! no way to tell visibility from stabs??? */
4114 new->visibility = VISIBILITY_PUBLIC;
4116 /* set field info into fip */
4117 fip->list->field.type = stype;
4119 /* set bitpos & bitsize */
4120 SET_FIELD_PHYSNAME (fip->list->field, savestring (sname, strlen (sname)));
4122 /* set name field */
4123 /* The following is code to work around cfront generated stabs.
4124 The stabs contains full mangled name for each field.
4125 We try to demangle the name and extract the field name out of it.
4130 dem = cplus_demangle (sname, DMGL_ANSI | DMGL_PARAMS);
4133 dem_p = strrchr (dem, ':');
4134 if (dem_p != 0 && *(dem_p - 1) == ':')
4136 fip->list->field.name =
4137 obsavestring (dem_p, strlen (dem_p), &objfile->type_obstack);
4141 fip->list->field.name =
4142 obsavestring (sname, strlen (sname), &objfile->type_obstack);
4144 } /* end of code for cfront work around */
4145 } /* loop again for next static field */
4149 /* Copy structure fields to fip so attach_fields_to_type will work.
4150 type has already been created with the initial instance data fields.
4151 Now we want to be able to add the other members to the class,
4152 so we want to add them back to the fip and reattach them again
4153 once we have collected all the class members. */
4156 copy_cfront_struct_fields (struct field_info *fip, struct type *type,
4157 struct objfile *objfile)
4159 int nfields = TYPE_NFIELDS (type);
4161 struct nextfield *new;
4163 /* Copy the fields into the list of fips and reset the types
4164 to remove the old fields */
4166 for (i = 0; i < nfields; i++)
4168 /* allocate a new fip */
4169 new = (struct nextfield *) xmalloc (sizeof (struct nextfield));
4170 make_cleanup (xfree, new);
4171 memset (new, 0, sizeof (struct nextfield));
4172 new->next = fip->list;
4175 /* copy field info into fip */
4176 new->field = TYPE_FIELD (type, i);
4177 /* set visibility */
4178 if (TYPE_FIELD_PROTECTED (type, i))
4179 new->visibility = VISIBILITY_PROTECTED;
4180 else if (TYPE_FIELD_PRIVATE (type, i))
4181 new->visibility = VISIBILITY_PRIVATE;
4183 new->visibility = VISIBILITY_PUBLIC;
4185 /* Now delete the fields from the type since we will be
4186 allocing new space once we get the rest of the fields
4187 in attach_fields_to_type.
4188 The pointer TYPE_FIELDS(type) is left dangling but should
4189 be freed later by objstack_free */
4190 TYPE_FIELDS (type) = 0;
4191 TYPE_NFIELDS (type) = 0;
4196 /* Create the vector of fields, and record how big it is.
4197 We need this info to record proper virtual function table information
4198 for this class's virtual functions. */
4201 attach_fields_to_type (struct field_info *fip, register struct type *type,
4202 struct objfile *objfile)
4204 register int nfields = 0;
4205 register int non_public_fields = 0;
4206 register struct nextfield *scan;
4208 /* Count up the number of fields that we have, as well as taking note of
4209 whether or not there are any non-public fields, which requires us to
4210 allocate and build the private_field_bits and protected_field_bits
4213 for (scan = fip->list; scan != NULL; scan = scan->next)
4216 if (scan->visibility != VISIBILITY_PUBLIC)
4218 non_public_fields++;
4222 /* Now we know how many fields there are, and whether or not there are any
4223 non-public fields. Record the field count, allocate space for the
4224 array of fields, and create blank visibility bitfields if necessary. */
4226 TYPE_NFIELDS (type) = nfields;
4227 TYPE_FIELDS (type) = (struct field *)
4228 TYPE_ALLOC (type, sizeof (struct field) * nfields);
4229 memset (TYPE_FIELDS (type), 0, sizeof (struct field) * nfields);
4231 if (non_public_fields)
4233 ALLOCATE_CPLUS_STRUCT_TYPE (type);
4235 TYPE_FIELD_PRIVATE_BITS (type) =
4236 (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields));
4237 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type), nfields);
4239 TYPE_FIELD_PROTECTED_BITS (type) =
4240 (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields));
4241 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type), nfields);
4243 TYPE_FIELD_IGNORE_BITS (type) =
4244 (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields));
4245 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type), nfields);
4248 /* Copy the saved-up fields into the field vector. Start from the head
4249 of the list, adding to the tail of the field array, so that they end
4250 up in the same order in the array in which they were added to the list. */
4252 while (nfields-- > 0)
4254 TYPE_FIELD (type, nfields) = fip->list->field;
4255 switch (fip->list->visibility)
4257 case VISIBILITY_PRIVATE:
4258 SET_TYPE_FIELD_PRIVATE (type, nfields);
4261 case VISIBILITY_PROTECTED:
4262 SET_TYPE_FIELD_PROTECTED (type, nfields);
4265 case VISIBILITY_IGNORE:
4266 SET_TYPE_FIELD_IGNORE (type, nfields);
4269 case VISIBILITY_PUBLIC:
4273 /* Unknown visibility. Complain and treat it as public. */
4275 complaint (&symfile_complaints, "Unknown visibility `%c' for field",
4276 fip->list->visibility);
4280 fip->list = fip->list->next;
4286 /* Complain that the compiler has emitted more than one definition for the
4287 structure type TYPE. */
4289 complain_about_struct_wipeout (struct type *type)
4294 if (TYPE_TAG_NAME (type))
4296 name = TYPE_TAG_NAME (type);
4297 switch (TYPE_CODE (type))
4299 case TYPE_CODE_STRUCT: kind = "struct "; break;
4300 case TYPE_CODE_UNION: kind = "union "; break;
4301 case TYPE_CODE_ENUM: kind = "enum "; break;
4305 else if (TYPE_NAME (type))
4307 name = TYPE_NAME (type);
4316 complaint (&symfile_complaints,
4317 "struct/union type gets multiply defined: %s%s", kind, name);
4321 /* Read the description of a structure (or union type) and return an object
4322 describing the type.
4324 PP points to a character pointer that points to the next unconsumed token
4325 in the the stabs string. For example, given stabs "A:T4=s4a:1,0,32;;",
4326 *PP will point to "4a:1,0,32;;".
4328 TYPE points to an incomplete type that needs to be filled in.
4330 OBJFILE points to the current objfile from which the stabs information is
4331 being read. (Note that it is redundant in that TYPE also contains a pointer
4332 to this same objfile, so it might be a good idea to eliminate it. FIXME).
4335 static struct type *
4336 read_struct_type (char **pp, struct type *type, enum type_code type_code,
4337 struct objfile *objfile)
4339 struct cleanup *back_to;
4340 struct field_info fi;
4345 /* When describing struct/union/class types in stabs, G++ always drops
4346 all qualifications from the name. So if you've got:
4347 struct A { ... struct B { ... }; ... };
4348 then G++ will emit stabs for `struct A::B' that call it simply
4349 `struct B'. Obviously, if you've got a real top-level definition for
4350 `struct B', or other nested definitions, this is going to cause
4353 Obviously, GDB can't fix this by itself, but it can at least avoid
4354 scribbling on existing structure type objects when new definitions
4356 if (! (TYPE_CODE (type) == TYPE_CODE_UNDEF
4357 || TYPE_STUB (type)))
4359 complain_about_struct_wipeout (type);
4361 /* It's probably best to return the type unchanged. */
4365 back_to = make_cleanup (null_cleanup, 0);
4367 INIT_CPLUS_SPECIFIC (type);
4368 TYPE_CODE (type) = type_code;
4369 TYPE_FLAGS (type) &= ~TYPE_FLAG_STUB;
4371 /* First comes the total size in bytes. */
4375 TYPE_LENGTH (type) = read_huge_number (pp, 0, &nbits);
4377 return error_type (pp, objfile);
4380 /* Now read the baseclasses, if any, read the regular C struct or C++
4381 class member fields, attach the fields to the type, read the C++
4382 member functions, attach them to the type, and then read any tilde
4383 field (baseclass specifier for the class holding the main vtable). */
4385 if (!read_baseclasses (&fi, pp, type, objfile)
4386 || !read_struct_fields (&fi, pp, type, objfile)
4387 || !attach_fields_to_type (&fi, type, objfile)
4388 || !read_member_functions (&fi, pp, type, objfile)
4389 || !attach_fn_fields_to_type (&fi, type)
4390 || !read_tilde_fields (&fi, pp, type, objfile))
4392 type = error_type (pp, objfile);
4395 do_cleanups (back_to);
4399 /* Read a definition of an array type,
4400 and create and return a suitable type object.
4401 Also creates a range type which represents the bounds of that
4404 static struct type *
4405 read_array_type (register char **pp, register struct type *type,
4406 struct objfile *objfile)
4408 struct type *index_type, *element_type, *range_type;
4413 /* Format of an array type:
4414 "ar<index type>;lower;upper;<array_contents_type>".
4415 OS9000: "arlower,upper;<array_contents_type>".
4417 Fortran adjustable arrays use Adigits or Tdigits for lower or upper;
4418 for these, produce a type like float[][]. */
4421 index_type = read_type (pp, objfile);
4423 /* Improper format of array type decl. */
4424 return error_type (pp, objfile);
4428 if (!(**pp >= '0' && **pp <= '9') && **pp != '-')
4433 lower = read_huge_number (pp, ';', &nbits);
4436 return error_type (pp, objfile);
4438 if (!(**pp >= '0' && **pp <= '9') && **pp != '-')
4443 upper = read_huge_number (pp, ';', &nbits);
4445 return error_type (pp, objfile);
4447 element_type = read_type (pp, objfile);
4456 create_range_type ((struct type *) NULL, index_type, lower, upper);
4457 type = create_array_type (type, element_type, range_type);
4463 /* Read a definition of an enumeration type,
4464 and create and return a suitable type object.
4465 Also defines the symbols that represent the values of the type. */
4467 static struct type *
4468 read_enum_type (register char **pp, register struct type *type,
4469 struct objfile *objfile)
4474 register struct symbol *sym;
4476 struct pending **symlist;
4477 struct pending *osyms, *syms;
4480 int unsigned_enum = 1;
4483 /* FIXME! The stabs produced by Sun CC merrily define things that ought
4484 to be file-scope, between N_FN entries, using N_LSYM. What's a mother
4485 to do? For now, force all enum values to file scope. */
4486 if (within_function)
4487 symlist = &local_symbols;
4490 symlist = &file_symbols;
4492 o_nsyms = osyms ? osyms->nsyms : 0;
4494 /* The aix4 compiler emits an extra field before the enum members;
4495 my guess is it's a type of some sort. Just ignore it. */
4498 /* Skip over the type. */
4502 /* Skip over the colon. */
4506 /* Read the value-names and their values.
4507 The input syntax is NAME:VALUE,NAME:VALUE, and so on.
4508 A semicolon or comma instead of a NAME means the end. */
4509 while (**pp && **pp != ';' && **pp != ',')
4511 STABS_CONTINUE (pp, objfile);
4515 name = obsavestring (*pp, p - *pp, &objfile->symbol_obstack);
4517 n = read_huge_number (pp, ',', &nbits);
4519 return error_type (pp, objfile);
4521 sym = (struct symbol *)
4522 obstack_alloc (&objfile->symbol_obstack, sizeof (struct symbol));
4523 memset (sym, 0, sizeof (struct symbol));
4524 SYMBOL_NAME (sym) = name;
4525 SYMBOL_LANGUAGE (sym) = current_subfile->language;
4526 SYMBOL_CLASS (sym) = LOC_CONST;
4527 SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE;
4528 SYMBOL_VALUE (sym) = n;
4531 add_symbol_to_list (sym, symlist);
4536 (*pp)++; /* Skip the semicolon. */
4538 /* Now fill in the fields of the type-structure. */
4540 TYPE_LENGTH (type) = TARGET_INT_BIT / HOST_CHAR_BIT;
4541 TYPE_CODE (type) = TYPE_CODE_ENUM;
4542 TYPE_FLAGS (type) &= ~TYPE_FLAG_STUB;
4544 TYPE_FLAGS (type) |= TYPE_FLAG_UNSIGNED;
4545 TYPE_NFIELDS (type) = nsyms;
4546 TYPE_FIELDS (type) = (struct field *)
4547 TYPE_ALLOC (type, sizeof (struct field) * nsyms);
4548 memset (TYPE_FIELDS (type), 0, sizeof (struct field) * nsyms);
4550 /* Find the symbols for the values and put them into the type.
4551 The symbols can be found in the symlist that we put them on
4552 to cause them to be defined. osyms contains the old value
4553 of that symlist; everything up to there was defined by us. */
4554 /* Note that we preserve the order of the enum constants, so
4555 that in something like "enum {FOO, LAST_THING=FOO}" we print
4556 FOO, not LAST_THING. */
4558 for (syms = *symlist, n = nsyms - 1; syms; syms = syms->next)
4560 int last = syms == osyms ? o_nsyms : 0;
4561 int j = syms->nsyms;
4562 for (; --j >= last; --n)
4564 struct symbol *xsym = syms->symbol[j];
4565 SYMBOL_TYPE (xsym) = type;
4566 TYPE_FIELD_NAME (type, n) = SYMBOL_NAME (xsym);
4567 TYPE_FIELD_BITPOS (type, n) = SYMBOL_VALUE (xsym);
4568 TYPE_FIELD_BITSIZE (type, n) = 0;
4577 /* Sun's ACC uses a somewhat saner method for specifying the builtin
4578 typedefs in every file (for int, long, etc):
4580 type = b <signed> <width> <format type>; <offset>; <nbits>
4582 optional format type = c or b for char or boolean.
4583 offset = offset from high order bit to start bit of type.
4584 width is # bytes in object of this type, nbits is # bits in type.
4586 The width/offset stuff appears to be for small objects stored in
4587 larger ones (e.g. `shorts' in `int' registers). We ignore it for now,
4590 static struct type *
4591 read_sun_builtin_type (char **pp, int typenums[2], struct objfile *objfile)
4596 enum type_code code = TYPE_CODE_INT;
4607 return error_type (pp, objfile);
4611 /* For some odd reason, all forms of char put a c here. This is strange
4612 because no other type has this honor. We can safely ignore this because
4613 we actually determine 'char'acterness by the number of bits specified in
4615 Boolean forms, e.g Fortran logical*X, put a b here. */
4619 else if (**pp == 'b')
4621 code = TYPE_CODE_BOOL;
4625 /* The first number appears to be the number of bytes occupied
4626 by this type, except that unsigned short is 4 instead of 2.
4627 Since this information is redundant with the third number,
4628 we will ignore it. */
4629 read_huge_number (pp, ';', &nbits);
4631 return error_type (pp, objfile);
4633 /* The second number is always 0, so ignore it too. */
4634 read_huge_number (pp, ';', &nbits);
4636 return error_type (pp, objfile);
4638 /* The third number is the number of bits for this type. */
4639 type_bits = read_huge_number (pp, 0, &nbits);
4641 return error_type (pp, objfile);
4642 /* The type *should* end with a semicolon. If it are embedded
4643 in a larger type the semicolon may be the only way to know where
4644 the type ends. If this type is at the end of the stabstring we
4645 can deal with the omitted semicolon (but we don't have to like
4646 it). Don't bother to complain(), Sun's compiler omits the semicolon
4652 return init_type (TYPE_CODE_VOID, 1,
4653 signed_type ? 0 : TYPE_FLAG_UNSIGNED, (char *) NULL,
4656 return init_type (code,
4657 type_bits / TARGET_CHAR_BIT,
4658 signed_type ? 0 : TYPE_FLAG_UNSIGNED, (char *) NULL,
4662 static struct type *
4663 read_sun_floating_type (char **pp, int typenums[2], struct objfile *objfile)
4668 struct type *rettype;
4670 /* The first number has more details about the type, for example
4672 details = read_huge_number (pp, ';', &nbits);
4674 return error_type (pp, objfile);
4676 /* The second number is the number of bytes occupied by this type */
4677 nbytes = read_huge_number (pp, ';', &nbits);
4679 return error_type (pp, objfile);
4681 if (details == NF_COMPLEX || details == NF_COMPLEX16
4682 || details == NF_COMPLEX32)
4684 rettype = init_type (TYPE_CODE_COMPLEX, nbytes, 0, NULL, objfile);
4685 TYPE_TARGET_TYPE (rettype)
4686 = init_type (TYPE_CODE_FLT, nbytes / 2, 0, NULL, objfile);
4690 return init_type (TYPE_CODE_FLT, nbytes, 0, NULL, objfile);
4693 /* Read a number from the string pointed to by *PP.
4694 The value of *PP is advanced over the number.
4695 If END is nonzero, the character that ends the
4696 number must match END, or an error happens;
4697 and that character is skipped if it does match.
4698 If END is zero, *PP is left pointing to that character.
4700 If the number fits in a long, set *BITS to 0 and return the value.
4701 If not, set *BITS to be the number of bits in the number and return 0.
4703 If encounter garbage, set *BITS to -1 and return 0. */
4706 read_huge_number (char **pp, int end, int *bits)
4723 /* Leading zero means octal. GCC uses this to output values larger
4724 than an int (because that would be hard in decimal). */
4731 upper_limit = LONG_MAX / radix;
4733 while ((c = *p++) >= '0' && c < ('0' + radix))
4735 if (n <= upper_limit)
4738 n += c - '0'; /* FIXME this overflows anyway */
4743 /* This depends on large values being output in octal, which is
4750 /* Ignore leading zeroes. */
4754 else if (c == '2' || c == '3')
4780 /* Large decimal constants are an error (because it is hard to
4781 count how many bits are in them). */
4787 /* -0x7f is the same as 0x80. So deal with it by adding one to
4788 the number of bits. */
4800 /* It's *BITS which has the interesting information. */
4804 static struct type *
4805 read_range_type (char **pp, int typenums[2], struct objfile *objfile)
4807 char *orig_pp = *pp;
4812 struct type *result_type;
4813 struct type *index_type = NULL;
4815 /* First comes a type we are a subrange of.
4816 In C it is usually 0, 1 or the type being defined. */
4817 if (read_type_number (pp, rangenums) != 0)
4818 return error_type (pp, objfile);
4819 self_subrange = (rangenums[0] == typenums[0] &&
4820 rangenums[1] == typenums[1]);
4825 index_type = read_type (pp, objfile);
4828 /* A semicolon should now follow; skip it. */
4832 /* The remaining two operands are usually lower and upper bounds
4833 of the range. But in some special cases they mean something else. */
4834 n2 = read_huge_number (pp, ';', &n2bits);
4835 n3 = read_huge_number (pp, ';', &n3bits);
4837 if (n2bits == -1 || n3bits == -1)
4838 return error_type (pp, objfile);
4841 goto handle_true_range;
4843 /* If limits are huge, must be large integral type. */
4844 if (n2bits != 0 || n3bits != 0)
4846 char got_signed = 0;
4847 char got_unsigned = 0;
4848 /* Number of bits in the type. */
4851 /* Range from 0 to <large number> is an unsigned large integral type. */
4852 if ((n2bits == 0 && n2 == 0) && n3bits != 0)
4857 /* Range from <large number> to <large number>-1 is a large signed
4858 integral type. Take care of the case where <large number> doesn't
4859 fit in a long but <large number>-1 does. */
4860 else if ((n2bits != 0 && n3bits != 0 && n2bits == n3bits + 1)
4861 || (n2bits != 0 && n3bits == 0
4862 && (n2bits == sizeof (long) * HOST_CHAR_BIT)
4869 if (got_signed || got_unsigned)
4871 return init_type (TYPE_CODE_INT, nbits / TARGET_CHAR_BIT,
4872 got_unsigned ? TYPE_FLAG_UNSIGNED : 0, NULL,
4876 return error_type (pp, objfile);
4879 /* A type defined as a subrange of itself, with bounds both 0, is void. */
4880 if (self_subrange && n2 == 0 && n3 == 0)
4881 return init_type (TYPE_CODE_VOID, 1, 0, NULL, objfile);
4883 /* If n3 is zero and n2 is positive, we want a floating type, and n2
4884 is the width in bytes.
4886 Fortran programs appear to use this for complex types also. To
4887 distinguish between floats and complex, g77 (and others?) seem
4888 to use self-subranges for the complexes, and subranges of int for
4891 Also note that for complexes, g77 sets n2 to the size of one of
4892 the member floats, not the whole complex beast. My guess is that
4893 this was to work well with pre-COMPLEX versions of gdb. */
4895 if (n3 == 0 && n2 > 0)
4897 struct type *float_type
4898 = init_type (TYPE_CODE_FLT, n2, 0, NULL, objfile);
4902 struct type *complex_type =
4903 init_type (TYPE_CODE_COMPLEX, 2 * n2, 0, NULL, objfile);
4904 TYPE_TARGET_TYPE (complex_type) = float_type;
4905 return complex_type;
4911 /* If the upper bound is -1, it must really be an unsigned int. */
4913 else if (n2 == 0 && n3 == -1)
4915 /* It is unsigned int or unsigned long. */
4916 /* GCC 2.3.3 uses this for long long too, but that is just a GDB 3.5
4917 compatibility hack. */
4918 return init_type (TYPE_CODE_INT, TARGET_INT_BIT / TARGET_CHAR_BIT,
4919 TYPE_FLAG_UNSIGNED, NULL, objfile);
4922 /* Special case: char is defined (Who knows why) as a subrange of
4923 itself with range 0-127. */
4924 else if (self_subrange && n2 == 0 && n3 == 127)
4925 return init_type (TYPE_CODE_INT, 1, 0, NULL, objfile);
4927 /* We used to do this only for subrange of self or subrange of int. */
4930 /* -1 is used for the upper bound of (4 byte) "unsigned int" and
4931 "unsigned long", and we already checked for that,
4932 so don't need to test for it here. */
4935 /* n3 actually gives the size. */
4936 return init_type (TYPE_CODE_INT, -n3, TYPE_FLAG_UNSIGNED,
4939 /* Is n3 == 2**(8n)-1 for some integer n? Then it's an
4940 unsigned n-byte integer. But do require n to be a power of
4941 two; we don't want 3- and 5-byte integers flying around. */
4947 for (bytes = 0; (bits & 0xff) == 0xff; bytes++)
4950 && ((bytes - 1) & bytes) == 0) /* "bytes is a power of two" */
4951 return init_type (TYPE_CODE_INT, bytes, TYPE_FLAG_UNSIGNED, NULL,
4955 /* I think this is for Convex "long long". Since I don't know whether
4956 Convex sets self_subrange, I also accept that particular size regardless
4957 of self_subrange. */
4958 else if (n3 == 0 && n2 < 0
4960 || n2 == -TARGET_LONG_LONG_BIT / TARGET_CHAR_BIT))
4961 return init_type (TYPE_CODE_INT, -n2, 0, NULL, objfile);
4962 else if (n2 == -n3 - 1)
4965 return init_type (TYPE_CODE_INT, 1, 0, NULL, objfile);
4967 return init_type (TYPE_CODE_INT, 2, 0, NULL, objfile);
4968 if (n3 == 0x7fffffff)
4969 return init_type (TYPE_CODE_INT, 4, 0, NULL, objfile);
4972 /* We have a real range type on our hands. Allocate space and
4973 return a real pointer. */
4977 index_type = builtin_type_int;
4979 index_type = *dbx_lookup_type (rangenums);
4980 if (index_type == NULL)
4982 /* Does this actually ever happen? Is that why we are worrying
4983 about dealing with it rather than just calling error_type? */
4985 static struct type *range_type_index;
4987 complaint (&symfile_complaints,
4988 "base type %d of range type is not defined", rangenums[1]);
4989 if (range_type_index == NULL)
4991 init_type (TYPE_CODE_INT, TARGET_INT_BIT / TARGET_CHAR_BIT,
4992 0, "range type index type", NULL);
4993 index_type = range_type_index;
4996 result_type = create_range_type ((struct type *) NULL, index_type, n2, n3);
4997 return (result_type);
5000 /* Read in an argument list. This is a list of types, separated by commas
5001 and terminated with END. Return the list of types read in, or (struct type
5002 **)-1 if there is an error. */
5004 static struct field *
5005 read_args (char **pp, int end, struct objfile *objfile, int *nargsp,
5008 /* FIXME! Remove this arbitrary limit! */
5009 struct type *types[1024]; /* allow for fns of 1023 parameters */
5016 /* Invalid argument list: no ','. */
5017 return (struct field *) -1;
5019 STABS_CONTINUE (pp, objfile);
5020 types[n++] = read_type (pp, objfile);
5022 (*pp)++; /* get past `end' (the ':' character) */
5024 if (TYPE_CODE (types[n - 1]) != TYPE_CODE_VOID)
5032 rval = (struct field *) xmalloc (n * sizeof (struct field));
5033 memset (rval, 0, n * sizeof (struct field));
5034 for (i = 0; i < n; i++)
5035 rval[i].type = types[i];
5040 /* Common block handling. */
5042 /* List of symbols declared since the last BCOMM. This list is a tail
5043 of local_symbols. When ECOMM is seen, the symbols on the list
5044 are noted so their proper addresses can be filled in later,
5045 using the common block base address gotten from the assembler
5048 static struct pending *common_block;
5049 static int common_block_i;
5051 /* Name of the current common block. We get it from the BCOMM instead of the
5052 ECOMM to match IBM documentation (even though IBM puts the name both places
5053 like everyone else). */
5054 static char *common_block_name;
5056 /* Process a N_BCOMM symbol. The storage for NAME is not guaranteed
5057 to remain after this function returns. */
5060 common_block_start (char *name, struct objfile *objfile)
5062 if (common_block_name != NULL)
5064 complaint (&symfile_complaints,
5065 "Invalid symbol data: common block within common block");
5067 common_block = local_symbols;
5068 common_block_i = local_symbols ? local_symbols->nsyms : 0;
5069 common_block_name = obsavestring (name, strlen (name),
5070 &objfile->symbol_obstack);
5073 /* Process a N_ECOMM symbol. */
5076 common_block_end (struct objfile *objfile)
5078 /* Symbols declared since the BCOMM are to have the common block
5079 start address added in when we know it. common_block and
5080 common_block_i point to the first symbol after the BCOMM in
5081 the local_symbols list; copy the list and hang it off the
5082 symbol for the common block name for later fixup. */
5085 struct pending *new = 0;
5086 struct pending *next;
5089 if (common_block_name == NULL)
5091 complaint (&symfile_complaints, "ECOMM symbol unmatched by BCOMM");
5095 sym = (struct symbol *)
5096 obstack_alloc (&objfile->symbol_obstack, sizeof (struct symbol));
5097 memset (sym, 0, sizeof (struct symbol));
5098 /* Note: common_block_name already saved on symbol_obstack */
5099 SYMBOL_NAME (sym) = common_block_name;
5100 SYMBOL_CLASS (sym) = LOC_BLOCK;
5102 /* Now we copy all the symbols which have been defined since the BCOMM. */
5104 /* Copy all the struct pendings before common_block. */
5105 for (next = local_symbols;
5106 next != NULL && next != common_block;
5109 for (j = 0; j < next->nsyms; j++)
5110 add_symbol_to_list (next->symbol[j], &new);
5113 /* Copy however much of COMMON_BLOCK we need. If COMMON_BLOCK is
5114 NULL, it means copy all the local symbols (which we already did
5117 if (common_block != NULL)
5118 for (j = common_block_i; j < common_block->nsyms; j++)
5119 add_symbol_to_list (common_block->symbol[j], &new);
5121 SYMBOL_TYPE (sym) = (struct type *) new;
5123 /* Should we be putting local_symbols back to what it was?
5126 i = hashname (SYMBOL_NAME (sym));
5127 SYMBOL_VALUE_CHAIN (sym) = global_sym_chain[i];
5128 global_sym_chain[i] = sym;
5129 common_block_name = NULL;
5132 /* Add a common block's start address to the offset of each symbol
5133 declared to be in it (by being between a BCOMM/ECOMM pair that uses
5134 the common block name). */
5137 fix_common_block (struct symbol *sym, int valu)
5139 struct pending *next = (struct pending *) SYMBOL_TYPE (sym);
5140 for (; next; next = next->next)
5143 for (j = next->nsyms - 1; j >= 0; j--)
5144 SYMBOL_VALUE_ADDRESS (next->symbol[j]) += valu;
5150 /* What about types defined as forward references inside of a small lexical
5152 /* Add a type to the list of undefined types to be checked through
5153 once this file has been read in. */
5156 add_undefined_type (struct type *type)
5158 if (undef_types_length == undef_types_allocated)
5160 undef_types_allocated *= 2;
5161 undef_types = (struct type **)
5162 xrealloc ((char *) undef_types,
5163 undef_types_allocated * sizeof (struct type *));
5165 undef_types[undef_types_length++] = type;
5168 /* Go through each undefined type, see if it's still undefined, and fix it
5169 up if possible. We have two kinds of undefined types:
5171 TYPE_CODE_ARRAY: Array whose target type wasn't defined yet.
5172 Fix: update array length using the element bounds
5173 and the target type's length.
5174 TYPE_CODE_STRUCT, TYPE_CODE_UNION: Structure whose fields were not
5175 yet defined at the time a pointer to it was made.
5176 Fix: Do a full lookup on the struct/union tag. */
5178 cleanup_undefined_types (void)
5182 for (type = undef_types; type < undef_types + undef_types_length; type++)
5184 switch (TYPE_CODE (*type))
5187 case TYPE_CODE_STRUCT:
5188 case TYPE_CODE_UNION:
5189 case TYPE_CODE_ENUM:
5191 /* Check if it has been defined since. Need to do this here
5192 as well as in check_typedef to deal with the (legitimate in
5193 C though not C++) case of several types with the same name
5194 in different source files. */
5195 if (TYPE_STUB (*type))
5197 struct pending *ppt;
5199 /* Name of the type, without "struct" or "union" */
5200 char *typename = TYPE_TAG_NAME (*type);
5202 if (typename == NULL)
5204 complaint (&symfile_complaints, "need a type name");
5207 for (ppt = file_symbols; ppt; ppt = ppt->next)
5209 for (i = 0; i < ppt->nsyms; i++)
5211 struct symbol *sym = ppt->symbol[i];
5213 if (SYMBOL_CLASS (sym) == LOC_TYPEDEF
5214 && SYMBOL_NAMESPACE (sym) == STRUCT_NAMESPACE
5215 && (TYPE_CODE (SYMBOL_TYPE (sym)) ==
5217 && STREQ (SYMBOL_NAME (sym), typename))
5218 replace_type (*type, SYMBOL_TYPE (sym));
5227 complaint (&symfile_complaints,
5228 "GDB internal error. cleanup_undefined_types with bad type %d.",
5235 undef_types_length = 0;
5238 /* Scan through all of the global symbols defined in the object file,
5239 assigning values to the debugging symbols that need to be assigned
5240 to. Get these symbols from the minimal symbol table. */
5243 scan_file_globals (struct objfile *objfile)
5246 struct minimal_symbol *msymbol;
5247 struct symbol *sym, *prev, *rsym;
5248 struct objfile *resolve_objfile;
5250 /* SVR4 based linkers copy referenced global symbols from shared
5251 libraries to the main executable.
5252 If we are scanning the symbols for a shared library, try to resolve
5253 them from the minimal symbols of the main executable first. */
5255 if (symfile_objfile && objfile != symfile_objfile)
5256 resolve_objfile = symfile_objfile;
5258 resolve_objfile = objfile;
5262 /* Avoid expensive loop through all minimal symbols if there are
5263 no unresolved symbols. */
5264 for (hash = 0; hash < HASHSIZE; hash++)
5266 if (global_sym_chain[hash])
5269 if (hash >= HASHSIZE)
5272 for (msymbol = resolve_objfile->msymbols;
5273 msymbol && SYMBOL_NAME (msymbol) != NULL;
5278 /* Skip static symbols. */
5279 switch (MSYMBOL_TYPE (msymbol))
5291 /* Get the hash index and check all the symbols
5292 under that hash index. */
5294 hash = hashname (SYMBOL_NAME (msymbol));
5296 for (sym = global_sym_chain[hash]; sym;)
5298 if (SYMBOL_NAME (msymbol)[0] == SYMBOL_NAME (sym)[0] &&
5299 STREQ (SYMBOL_NAME (msymbol) + 1, SYMBOL_NAME (sym) + 1))
5302 struct alias_list *aliases;
5304 /* Splice this symbol out of the hash chain and
5305 assign the value we have to it. */
5308 SYMBOL_VALUE_CHAIN (prev) = SYMBOL_VALUE_CHAIN (sym);
5312 global_sym_chain[hash] = SYMBOL_VALUE_CHAIN (sym);
5315 /* Check to see whether we need to fix up a common block. */
5316 /* Note: this code might be executed several times for
5317 the same symbol if there are multiple references. */
5319 /* If symbol has aliases, do minimal symbol fixups for each.
5320 These live aliases/references weren't added to
5321 global_sym_chain hash but may also need to be fixed up. */
5322 /* FIXME: Maybe should have added aliases to the global chain, resolved symbol name, then treated aliases as normal
5323 symbols? Still, we wouldn't want to add_to_list. */
5324 /* Now do the same for each alias of this symbol */
5326 aliases = SYMBOL_ALIASES (sym);
5329 if (SYMBOL_CLASS (rsym) == LOC_BLOCK)
5331 fix_common_block (rsym,
5332 SYMBOL_VALUE_ADDRESS (msymbol));
5336 SYMBOL_VALUE_ADDRESS (rsym)
5337 = SYMBOL_VALUE_ADDRESS (msymbol);
5339 SYMBOL_SECTION (rsym) = SYMBOL_SECTION (msymbol);
5342 rsym = aliases->sym;
5343 aliases = aliases->next;
5352 sym = SYMBOL_VALUE_CHAIN (prev);
5356 sym = global_sym_chain[hash];
5362 sym = SYMBOL_VALUE_CHAIN (sym);
5366 if (resolve_objfile == objfile)
5368 resolve_objfile = objfile;
5371 /* Change the storage class of any remaining unresolved globals to
5372 LOC_UNRESOLVED and remove them from the chain. */
5373 for (hash = 0; hash < HASHSIZE; hash++)
5375 sym = global_sym_chain[hash];
5379 sym = SYMBOL_VALUE_CHAIN (sym);
5381 /* Change the symbol address from the misleading chain value
5383 SYMBOL_VALUE_ADDRESS (prev) = 0;
5385 /* Complain about unresolved common block symbols. */
5386 if (SYMBOL_CLASS (prev) == LOC_STATIC)
5387 SYMBOL_CLASS (prev) = LOC_UNRESOLVED;
5389 complaint (&symfile_complaints,
5390 "%s: common block `%s' from global_sym_chain unresolved",
5391 objfile->name, SYMBOL_NAME (prev));
5394 memset (global_sym_chain, 0, sizeof (global_sym_chain));
5397 /* Initialize anything that needs initializing when starting to read
5398 a fresh piece of a symbol file, e.g. reading in the stuff corresponding
5402 stabsread_init (void)
5406 /* Initialize anything that needs initializing when a completely new
5407 symbol file is specified (not just adding some symbols from another
5408 file, e.g. a shared library). */
5411 stabsread_new_init (void)
5413 /* Empty the hash table of global syms looking for values. */
5414 memset (global_sym_chain, 0, sizeof (global_sym_chain));
5417 /* Initialize anything that needs initializing at the same time as
5418 start_symtab() is called. */
5423 global_stabs = NULL; /* AIX COFF */
5424 /* Leave FILENUM of 0 free for builtin types and this file's types. */
5425 n_this_object_header_files = 1;
5426 type_vector_length = 0;
5427 type_vector = (struct type **) 0;
5429 /* FIXME: If common_block_name is not already NULL, we should complain(). */
5430 common_block_name = NULL;
5433 /* Call after end_symtab() */
5440 xfree (type_vector);
5443 type_vector_length = 0;
5444 previous_stab_code = 0;
5448 finish_global_stabs (struct objfile *objfile)
5452 patch_block_stabs (global_symbols, global_stabs, objfile);
5453 xfree (global_stabs);
5454 global_stabs = NULL;
5458 /* Find the end of the name, delimited by a ':', but don't match
5459 ObjC symbols which look like -[Foo bar::]:bla. */
5461 find_name_end (char *name)
5464 if (s[0] == '-' || *s == '+')
5466 /* Must be an ObjC method symbol. */
5469 error ("invalid symbol name \"%s\"", name);
5471 s = strchr (s, ']');
5474 error ("invalid symbol name \"%s\"", name);
5476 return strchr (s, ':');
5480 return strchr (s, ':');
5484 /* Initializer for this module */
5487 _initialize_stabsread (void)
5489 undef_types_allocated = 20;
5490 undef_types_length = 0;
5491 undef_types = (struct type **)
5492 xmalloc (undef_types_allocated * sizeof (struct type *));