/* Support routines for decoding "stabs" debugging information format. Copyright 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003 Free Software Foundation, Inc. This file is part of GDB. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ /* Support routines for reading and decoding debugging information in the "stabs" format. This format is used with many systems that use the a.out object file format, as well as some systems that use COFF or ELF where the stabs data is placed in a special section. Avoid placing any object file format specific code in this file. */ static int os9k_stabs = 0; #include <limits.h> #include "defs.h" #include "gdb_string.h" #include "bfd.h" #include "gdb_obstack.h" #include "symtab.h" #include "gdbtypes.h" #include "expression.h" #include "symfile.h" #include "objfiles.h" #include "aout/stab_gnu.h" /* We always use GNU stabs, not native */ #include "libaout.h" #include "aout/aout64.h" #include "gdb-stabs.h" #include "buildsym.h" #include "complaints.h" #include "demangle.h" #include "language.h" #include "doublest.h" #include "cp-abi.h" #include "cp-support.h" #include <ctype.h> /* Ask stabsread.h to define the vars it normally declares `extern'. */ #define EXTERN /**/ #include "stabsread.h" /* Our own declarations */ #undef EXTERN extern void _initialize_stabsread (void); /* read_huge_number() returns all numbers in two parts: an unsigned 'data' value, and a an integer { -1, 1 } as a sign bit. MINUS_LONG_MIN is the absolute value of the minimum value that can be stored in a long. It can be used to compare against the 'data' value returned by read_huge_number to determine if (-data) will fit in a long. We can't just use -LONG_MIN, as that would implicitly be a long, not an unsigned long, and would overflow on 2's complement machines. */ #define MINUS_LONG_MIN (((unsigned long) (- (LONG_MAX + LONG_MIN))) + LONG_MAX) /* GDB stores enumerated values for an 'enum' type in the 'bitpos' slot of the 'field' structure (see gdbtypes.h). Currently, this field is an 'int'. */ #define UENUM_MAX UINT_MAX #define UENUM_MIN UINT_MIN #define ENUM_MAX INT_MAX #define ENUM_MIN INT_MIN /* The 'ENUM' analogue of MINUS_LONG_MIN. */ #define MINUS_ENUM_MIN (((unsigned long) (- (ENUM_MAX + ENUM_MIN))) + ENUM_MAX) /* The routines that read and process a complete stabs for a C struct or C++ class pass lists of data member fields and lists of member function fields in an instance of a field_info structure, as defined below. This is part of some reorganization of low level C++ support and is expected to eventually go away... (FIXME) */ struct field_info { struct nextfield { struct nextfield *next; /* This is the raw visibility from the stab. It is not checked for being one of the visibilities we recognize, so code which examines this field better be able to deal. */ int visibility; struct field field; } *list; struct next_fnfieldlist { struct next_fnfieldlist *next; struct fn_fieldlist fn_fieldlist; } *fnlist; }; static void read_one_struct_field (struct field_info *, char **, char *, struct type *, struct objfile *); static char *get_substring (char **, int); static struct type *dbx_alloc_type (int[2], struct objfile *); static long read_huge_number (char **, int, int *); static void read_huge_number_raw (char **pp, int end, int *bits, int *sign, unsigned long *data); static struct type *error_type (char **, struct objfile *); static void patch_block_stabs (struct pending *, struct pending_stabs *, struct objfile *); static void fix_common_block (struct symbol *, int); static int read_type_number (char **, int *); static struct type *read_range_type (char **, int[2], struct objfile *); static struct type *read_sun_builtin_type (char **, int[2], struct objfile *); static struct type *read_sun_floating_type (char **, int[2], struct objfile *); static struct type *read_enum_type (char **, struct type *, struct objfile *); static struct type *rs6000_builtin_type (int, struct objfile *); static int read_member_functions (struct field_info *, char **, struct type *, struct objfile *); static int read_struct_fields (struct field_info *, char **, struct type *, struct objfile *); static int read_baseclasses (struct field_info *, char **, struct type *, struct objfile *); static int read_tilde_fields (struct field_info *, char **, struct type *, struct objfile *); static int attach_fn_fields_to_type (struct field_info *, struct type *); static int attach_fields_to_type (struct field_info *, struct type *, struct objfile *); static struct type *read_struct_type (char **, struct type *, enum type_code, struct objfile *); static struct type *read_array_type (char **, struct type *, struct objfile *); static struct field *read_args (char **, int, struct objfile *, int *, int *); static int read_cpp_abbrev (struct field_info *, char **, struct type *, struct objfile *); #if 0 /* OBSOLETE CFront */ // OBSOLETE /* new functions added for cfront support */ // OBSOLETE static int // OBSOLETE copy_cfront_struct_fields (struct field_info *, struct type *, // OBSOLETE struct objfile *); // OBSOLETE static char *get_cfront_method_physname (char *); // OBSOLETE static int // OBSOLETE read_cfront_baseclasses (struct field_info *, char **, // OBSOLETE struct type *, struct objfile *); // OBSOLETE static int // OBSOLETE read_cfront_static_fields (struct field_info *, char **, // OBSOLETE struct type *, struct objfile *); // OBSOLETE static int // OBSOLETE read_cfront_member_functions (struct field_info *, char **, // OBSOLETE struct type *, struct objfile *); // OBSOLETE /* end new functions added for cfront support */ #endif /* OBSOLETE CFront */ static void add_live_range (struct objfile *, struct symbol *, CORE_ADDR, CORE_ADDR); static int resolve_live_range (struct objfile *, struct symbol *, char *); static int process_reference (char **string); static CORE_ADDR ref_search_value (int refnum); static int resolve_symbol_reference (struct objfile *, struct symbol *, char *); void stabsread_clear_cache (void); static const char vptr_name[] = "_vptr$"; static const char vb_name[] = "_vb$"; /* Define this as 1 if a pcc declaration of a char or short argument gives the correct address. Otherwise assume pcc gives the address of the corresponding int, which is not the same on a big-endian machine. */ #if !defined (BELIEVE_PCC_PROMOTION) #define BELIEVE_PCC_PROMOTION 0 #endif #if !defined (BELIEVE_PCC_PROMOTION_TYPE) #define BELIEVE_PCC_PROMOTION_TYPE 0 #endif static void invalid_cpp_abbrev_complaint (const char *arg1) { complaint (&symfile_complaints, "invalid C++ abbreviation `%s'", arg1); } static void reg_value_complaint (int arg1, int arg2, const char *arg3) { complaint (&symfile_complaints, "register number %d too large (max %d) in symbol %s", arg1, arg2, arg3); } static void stabs_general_complaint (const char *arg1) { complaint (&symfile_complaints, "%s", arg1); } static void lrs_general_complaint (const char *arg1) { complaint (&symfile_complaints, "%s", arg1); } /* Make a list of forward references which haven't been defined. */ static struct type **undef_types; static int undef_types_allocated; static int undef_types_length; static struct symbol *current_symbol = NULL; /* Check for and handle cretinous stabs symbol name continuation! */ #define STABS_CONTINUE(pp,objfile) \ do { \ if (**(pp) == '\\' || (**(pp) == '?' && (*(pp))[1] == '\0')) \ *(pp) = next_symbol_text (objfile); \ } while (0) /* Look up a dbx type-number pair. Return the address of the slot where the type for that number-pair is stored. The number-pair is in TYPENUMS. This can be used for finding the type associated with that pair or for associating a new type with the pair. */ struct type ** dbx_lookup_type (int typenums[2], struct objfile *objfile) { register int filenum = typenums[0]; register int index = typenums[1]; unsigned old_len; register int real_filenum; register struct header_file *f; int f_orig_length; if (filenum == -1) /* -1,-1 is for temporary types. */ return 0; if (filenum < 0 || filenum >= n_this_object_header_files) { complaint (&symfile_complaints, "Invalid symbol data: type number (%d,%d) out of range at symtab pos %d.", filenum, index, symnum); goto error_return; } if (filenum == 0) { if (index < 0) { /* Caller wants address of address of type. We think that negative (rs6k builtin) types will never appear as "lvalues", (nor should they), so we stuff the real type pointer into a temp, and return its address. If referenced, this will do the right thing. */ static struct type *temp_type; temp_type = rs6000_builtin_type (index, objfile); return &temp_type; } /* Type is defined outside of header files. Find it in this object file's type vector. */ if (index >= type_vector_length) { old_len = type_vector_length; if (old_len == 0) { type_vector_length = INITIAL_TYPE_VECTOR_LENGTH; type_vector = (struct type **) xmalloc (type_vector_length * sizeof (struct type *)); } while (index >= type_vector_length) { type_vector_length *= 2; } type_vector = (struct type **) xrealloc ((char *) type_vector, (type_vector_length * sizeof (struct type *))); memset (&type_vector[old_len], 0, (type_vector_length - old_len) * sizeof (struct type *)); } return (&type_vector[index]); } else { real_filenum = this_object_header_files[filenum]; if (real_filenum >= N_HEADER_FILES (current_objfile)) { struct type *temp_type; struct type **temp_type_p; warning ("GDB internal error: bad real_filenum"); error_return: temp_type = init_type (TYPE_CODE_ERROR, 0, 0, NULL, NULL); temp_type_p = (struct type **) xmalloc (sizeof (struct type *)); *temp_type_p = temp_type; return temp_type_p; } f = HEADER_FILES (current_objfile) + real_filenum; f_orig_length = f->length; if (index >= f_orig_length) { while (index >= f->length) { f->length *= 2; } f->vector = (struct type **) xrealloc ((char *) f->vector, f->length * sizeof (struct type *)); memset (&f->vector[f_orig_length], 0, (f->length - f_orig_length) * sizeof (struct type *)); } return (&f->vector[index]); } } /* Make sure there is a type allocated for type numbers TYPENUMS and return the type object. This can create an empty (zeroed) type object. TYPENUMS may be (-1, -1) to return a new type object that is not put into the type vector, and so may not be referred to by number. */ static struct type * dbx_alloc_type (int typenums[2], struct objfile *objfile) { register struct type **type_addr; if (typenums[0] == -1) { return (alloc_type (objfile)); } type_addr = dbx_lookup_type (typenums, objfile); /* If we are referring to a type not known at all yet, allocate an empty type for it. We will fill it in later if we find out how. */ if (*type_addr == 0) { *type_addr = alloc_type (objfile); } return (*type_addr); } /* for all the stabs in a given stab vector, build appropriate types and fix their symbols in given symbol vector. */ static void patch_block_stabs (struct pending *symbols, struct pending_stabs *stabs, struct objfile *objfile) { int ii; char *name; char *pp; struct symbol *sym; if (stabs) { /* for all the stab entries, find their corresponding symbols and patch their types! */ for (ii = 0; ii < stabs->count; ++ii) { name = stabs->stab[ii]; pp = (char *) strchr (name, ':'); while (pp[1] == ':') { pp += 2; pp = (char *) strchr (pp, ':'); } sym = find_symbol_in_list (symbols, name, pp - name); if (!sym) { /* FIXME-maybe: it would be nice if we noticed whether the variable was defined *anywhere*, not just whether it is defined in this compilation unit. But neither xlc or GCC seem to need such a definition, and until we do psymtabs (so that the minimal symbols from all compilation units are available now), I'm not sure how to get the information. */ /* On xcoff, if a global is defined and never referenced, ld will remove it from the executable. There is then a N_GSYM stab for it, but no regular (C_EXT) symbol. */ sym = (struct symbol *) obstack_alloc (&objfile->symbol_obstack, sizeof (struct symbol)); memset (sym, 0, sizeof (struct symbol)); SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE; SYMBOL_CLASS (sym) = LOC_OPTIMIZED_OUT; SYMBOL_NAME (sym) = obsavestring (name, pp - name, &objfile->symbol_obstack); pp += 2; if (*(pp - 1) == 'F' || *(pp - 1) == 'f') { /* I don't think the linker does this with functions, so as far as I know this is never executed. But it doesn't hurt to check. */ SYMBOL_TYPE (sym) = lookup_function_type (read_type (&pp, objfile)); } else { SYMBOL_TYPE (sym) = read_type (&pp, objfile); } add_symbol_to_list (sym, &global_symbols); } else { pp += 2; if (*(pp - 1) == 'F' || *(pp - 1) == 'f') { SYMBOL_TYPE (sym) = lookup_function_type (read_type (&pp, objfile)); } else { SYMBOL_TYPE (sym) = read_type (&pp, objfile); } } } } } /* Read a number by which a type is referred to in dbx data, or perhaps read a pair (FILENUM, TYPENUM) in parentheses. Just a single number N is equivalent to (0,N). Return the two numbers by storing them in the vector TYPENUMS. TYPENUMS will then be used as an argument to dbx_lookup_type. Returns 0 for success, -1 for error. */ static int read_type_number (register char **pp, register int *typenums) { int nbits; if (**pp == '(') { (*pp)++; typenums[0] = read_huge_number (pp, ',', &nbits); if (nbits != 0) return -1; typenums[1] = read_huge_number (pp, ')', &nbits); if (nbits != 0) return -1; } else { typenums[0] = 0; typenums[1] = read_huge_number (pp, 0, &nbits); if (nbits != 0) return -1; } return 0; } #define VISIBILITY_PRIVATE '0' /* Stabs character for private field */ #define VISIBILITY_PROTECTED '1' /* Stabs character for protected fld */ #define VISIBILITY_PUBLIC '2' /* Stabs character for public field */ #define VISIBILITY_IGNORE '9' /* Optimized out or zero length */ #if 0 /* OBSOLETE CFront */ // OBSOLETE #define CFRONT_VISIBILITY_PRIVATE '2' /* Stabs character for private field */ // OBSOLETE #define CFRONT_VISIBILITY_PUBLIC '1' /* Stabs character for public field */ // OBSOLETE /* This code added to support parsing of ARM/Cfront stabs strings */ // OBSOLETE /* Get substring from string up to char c, advance string pointer past // OBSOLETE suibstring. */ // OBSOLETE static char * // OBSOLETE get_substring (char **p, int c) // OBSOLETE { // OBSOLETE char *str; // OBSOLETE str = *p; // OBSOLETE *p = strchr (*p, c); // OBSOLETE if (*p) // OBSOLETE { // OBSOLETE **p = 0; // OBSOLETE (*p)++; // OBSOLETE } // OBSOLETE else // OBSOLETE str = 0; // OBSOLETE return str; // OBSOLETE } // OBSOLETE /* Physname gets strcat'd onto sname in order to recreate the mangled // OBSOLETE name (see funtion gdb_mangle_name in gdbtypes.c). For cfront, make // OBSOLETE the physname look like that of g++ - take out the initial mangling // OBSOLETE eg: for sname="a" and fname="foo__1aFPFs_i" return "FPFs_i" */ // OBSOLETE static char * // OBSOLETE get_cfront_method_physname (char *fname) // OBSOLETE { // OBSOLETE int len = 0; // OBSOLETE /* FIXME would like to make this generic for g++ too, but // OBSOLETE that is already handled in read_member_funcctions */ // OBSOLETE char *p = fname; // OBSOLETE /* search ahead to find the start of the mangled suffix */ // OBSOLETE if (*p == '_' && *(p + 1) == '_') /* compiler generated; probably a ctor/dtor */ // OBSOLETE p += 2; // OBSOLETE while (p && (unsigned) ((p + 1) - fname) < strlen (fname) && *(p + 1) != '_') // OBSOLETE p = strchr (p, '_'); // OBSOLETE if (!(p && *p == '_' && *(p + 1) == '_')) // OBSOLETE error ("Invalid mangled function name %s", fname); // OBSOLETE p += 2; /* advance past '__' */ // OBSOLETE /* struct name length and name of type should come next; advance past it */ // OBSOLETE while (isdigit (*p)) // OBSOLETE { // OBSOLETE len = len * 10 + (*p - '0'); // OBSOLETE p++; // OBSOLETE } // OBSOLETE p += len; // OBSOLETE return p; // OBSOLETE } // OBSOLETE static void // OBSOLETE msg_unknown_complaint (const char *arg1) // OBSOLETE { // OBSOLETE complaint (&symfile_complaints, "Unsupported token in stabs string %s", arg1); // OBSOLETE } // OBSOLETE /* Read base classes within cfront class definition. // OBSOLETE eg: A:ZcA;1@Bpub v2@Bvirpri;__ct__1AFv func__1AFv *sfunc__1AFv ;as__1A ;; // OBSOLETE ^^^^^^^^^^^^^^^^^^ // OBSOLETE A:ZcA;;foopri__1AFv foopro__1AFv __ct__1AFv __ct__1AFRC1A foopub__1AFv ;;; // OBSOLETE ^ // OBSOLETE */ // OBSOLETE static int // OBSOLETE read_cfront_baseclasses (struct field_info *fip, char **pp, struct type *type, // OBSOLETE struct objfile *objfile) // OBSOLETE { // OBSOLETE int bnum = 0; // OBSOLETE char *p; // OBSOLETE int i; // OBSOLETE struct nextfield *new; // OBSOLETE if (**pp == ';') /* no base classes; return */ // OBSOLETE { // OBSOLETE ++(*pp); // OBSOLETE return 1; // OBSOLETE } // OBSOLETE /* first count base classes so we can allocate space before parsing */ // OBSOLETE for (p = *pp; p && *p && *p != ';'; p++) // OBSOLETE { // OBSOLETE if (*p == ' ') // OBSOLETE bnum++; // OBSOLETE } // OBSOLETE bnum++; /* add one more for last one */ // OBSOLETE /* now parse the base classes until we get to the start of the methods // OBSOLETE (code extracted and munged from read_baseclasses) */ // OBSOLETE ALLOCATE_CPLUS_STRUCT_TYPE (type); // OBSOLETE TYPE_N_BASECLASSES (type) = bnum; // OBSOLETE /* allocate space */ // OBSOLETE { // OBSOLETE int num_bytes = B_BYTES (TYPE_N_BASECLASSES (type)); // OBSOLETE char *pointer; // OBSOLETE pointer = (char *) TYPE_ALLOC (type, num_bytes); // OBSOLETE TYPE_FIELD_VIRTUAL_BITS (type) = (B_TYPE *) pointer; // OBSOLETE } // OBSOLETE B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type), TYPE_N_BASECLASSES (type)); // OBSOLETE for (i = 0; i < TYPE_N_BASECLASSES (type); i++) // OBSOLETE { // OBSOLETE new = (struct nextfield *) xmalloc (sizeof (struct nextfield)); // OBSOLETE make_cleanup (xfree, new); // OBSOLETE memset (new, 0, sizeof (struct nextfield)); // OBSOLETE new->next = fip->list; // OBSOLETE fip->list = new; // OBSOLETE FIELD_BITSIZE (new->field) = 0; /* this should be an unpacked field! */ // OBSOLETE STABS_CONTINUE (pp, objfile); // OBSOLETE /* virtual? eg: v2@Bvir */ // OBSOLETE if (**pp == 'v') // OBSOLETE { // OBSOLETE SET_TYPE_FIELD_VIRTUAL (type, i); // OBSOLETE ++(*pp); // OBSOLETE } // OBSOLETE /* access? eg: 2@Bvir */ // OBSOLETE /* Note: protected inheritance not supported in cfront */ // OBSOLETE switch (*(*pp)++) // OBSOLETE { // OBSOLETE case CFRONT_VISIBILITY_PRIVATE: // OBSOLETE new->visibility = VISIBILITY_PRIVATE; // OBSOLETE break; // OBSOLETE case CFRONT_VISIBILITY_PUBLIC: // OBSOLETE new->visibility = VISIBILITY_PUBLIC; // OBSOLETE break; // OBSOLETE default: // OBSOLETE /* Bad visibility format. Complain and treat it as // OBSOLETE public. */ // OBSOLETE { // OBSOLETE complaint (&symfile_complaints, // OBSOLETE "Unknown visibility `%c' for baseclass", // OBSOLETE new->visibility); // OBSOLETE new->visibility = VISIBILITY_PUBLIC; // OBSOLETE } // OBSOLETE } // OBSOLETE /* "@" comes next - eg: @Bvir */ // OBSOLETE if (**pp != '@') // OBSOLETE { // OBSOLETE msg_unknown_complaint (*pp); // OBSOLETE return 1; // OBSOLETE } // OBSOLETE ++(*pp); // OBSOLETE /* Set the bit offset of the portion of the object corresponding // OBSOLETE to this baseclass. Always zero in the absence of // OBSOLETE multiple inheritance. */ // OBSOLETE /* Unable to read bit position from stabs; // OBSOLETE Assuming no multiple inheritance for now FIXME! */ // OBSOLETE /* We may have read this in the structure definition; // OBSOLETE now we should fixup the members to be the actual base classes */ // OBSOLETE FIELD_BITPOS (new->field) = 0; // OBSOLETE /* Get the base class name and type */ // OBSOLETE { // OBSOLETE char *bname; /* base class name */ // OBSOLETE struct symbol *bsym; /* base class */ // OBSOLETE char *p1, *p2; // OBSOLETE p1 = strchr (*pp, ' '); // OBSOLETE p2 = strchr (*pp, ';'); // OBSOLETE if (p1 < p2) // OBSOLETE bname = get_substring (pp, ' '); // OBSOLETE else // OBSOLETE bname = get_substring (pp, ';'); // OBSOLETE if (!bname || !*bname) // OBSOLETE { // OBSOLETE msg_unknown_complaint (*pp); // OBSOLETE return 1; // OBSOLETE } // OBSOLETE /* FIXME! attach base info to type */ // OBSOLETE bsym = lookup_symbol (bname, 0, STRUCT_NAMESPACE, 0, 0); /*demangled_name */ // OBSOLETE if (bsym) // OBSOLETE { // OBSOLETE new->field.type = SYMBOL_TYPE (bsym); // OBSOLETE new->field.name = type_name_no_tag (new->field.type); // OBSOLETE } // OBSOLETE else // OBSOLETE { // OBSOLETE complaint (&symfile_complaints, "Unable to find base type for %s", // OBSOLETE *pp); // OBSOLETE return 1; // OBSOLETE } // OBSOLETE } // OBSOLETE /* If more base classes to parse, loop again. // OBSOLETE We ate the last ' ' or ';' in get_substring, // OBSOLETE so on exit we will have skipped the trailing ';' */ // OBSOLETE /* if invalid, return 0; add code to detect - FIXME! */ // OBSOLETE } // OBSOLETE return 1; // OBSOLETE } // OBSOLETE /* read cfront member functions. // OBSOLETE pp points to string starting with list of functions // OBSOLETE eg: A:ZcA;1@Bpub v2@Bvirpri;__ct__1AFv func__1AFv *sfunc__1AFv ;as__1A ;; // OBSOLETE ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ // OBSOLETE A:ZcA;;foopri__1AFv foopro__1AFv __ct__1AFv __ct__1AFRC1A foopub__1AFv ;;; // OBSOLETE ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ // OBSOLETE */ // OBSOLETE static int // OBSOLETE read_cfront_member_functions (struct field_info *fip, char **pp, // OBSOLETE struct type *type, struct objfile *objfile) // OBSOLETE { // OBSOLETE /* This code extracted from read_member_functions // OBSOLETE so as to do the similar thing for our funcs */ // OBSOLETE int nfn_fields = 0; // OBSOLETE int length = 0; // OBSOLETE /* Total number of member functions defined in this class. If the class // OBSOLETE defines two `f' functions, and one `g' function, then this will have // OBSOLETE the value 3. */ // OBSOLETE int total_length = 0; // OBSOLETE int i; // OBSOLETE struct next_fnfield // OBSOLETE { // OBSOLETE struct next_fnfield *next; // OBSOLETE struct fn_field fn_field; // OBSOLETE } // OBSOLETE *sublist; // OBSOLETE struct type *look_ahead_type; // OBSOLETE struct next_fnfieldlist *new_fnlist; // OBSOLETE struct next_fnfield *new_sublist; // OBSOLETE char *main_fn_name; // OBSOLETE char *fname; // OBSOLETE struct symbol *ref_func = 0; // OBSOLETE /* Process each list until we find the end of the member functions. // OBSOLETE eg: p = "__ct__1AFv foo__1AFv ;;;" */ // OBSOLETE STABS_CONTINUE (pp, objfile); /* handle \\ */ // OBSOLETE while (**pp != ';' && (fname = get_substring (pp, ' '), fname)) // OBSOLETE { // OBSOLETE int is_static = 0; // OBSOLETE int sublist_count = 0; // OBSOLETE char *pname; // OBSOLETE if (fname[0] == '*') /* static member */ // OBSOLETE { // OBSOLETE is_static = 1; // OBSOLETE sublist_count++; // OBSOLETE fname++; // OBSOLETE } // OBSOLETE ref_func = lookup_symbol (fname, 0, VAR_NAMESPACE, 0, 0); /* demangled name */ // OBSOLETE if (!ref_func) // OBSOLETE { // OBSOLETE complaint (&symfile_complaints, // OBSOLETE "Unable to find function symbol for %s", fname); // OBSOLETE continue; // OBSOLETE } // OBSOLETE sublist = NULL; // OBSOLETE look_ahead_type = NULL; // OBSOLETE length = 0; // OBSOLETE new_fnlist = (struct next_fnfieldlist *) // OBSOLETE xmalloc (sizeof (struct next_fnfieldlist)); // OBSOLETE make_cleanup (xfree, new_fnlist); // OBSOLETE memset (new_fnlist, 0, sizeof (struct next_fnfieldlist)); // OBSOLETE /* The following is code to work around cfront generated stabs. // OBSOLETE The stabs contains full mangled name for each field. // OBSOLETE We try to demangle the name and extract the field name out of it. */ // OBSOLETE { // OBSOLETE char *dem, *dem_p, *dem_args; // OBSOLETE int dem_len; // OBSOLETE dem = cplus_demangle (fname, DMGL_ANSI | DMGL_PARAMS); // OBSOLETE if (dem != NULL) // OBSOLETE { // OBSOLETE dem_p = strrchr (dem, ':'); // OBSOLETE if (dem_p != 0 && *(dem_p - 1) == ':') // OBSOLETE dem_p++; // OBSOLETE /* get rid of args */ // OBSOLETE dem_args = strchr (dem_p, '('); // OBSOLETE if (dem_args == NULL) // OBSOLETE dem_len = strlen (dem_p); // OBSOLETE else // OBSOLETE dem_len = dem_args - dem_p; // OBSOLETE main_fn_name = // OBSOLETE obsavestring (dem_p, dem_len, &objfile->type_obstack); // OBSOLETE } // OBSOLETE else // OBSOLETE { // OBSOLETE main_fn_name = // OBSOLETE obsavestring (fname, strlen (fname), &objfile->type_obstack); // OBSOLETE } // OBSOLETE } /* end of code for cfront work around */ // OBSOLETE new_fnlist->fn_fieldlist.name = main_fn_name; // OBSOLETE /*-------------------------------------------------*/ // OBSOLETE /* Set up the sublists // OBSOLETE Sublists are stuff like args, static, visibility, etc. // OBSOLETE so in ARM, we have to set that info some other way. // OBSOLETE Multiple sublists happen if overloading // OBSOLETE eg: foo::26=##1;:;2A.; // OBSOLETE In g++, we'd loop here thru all the sublists... */ // OBSOLETE new_sublist = // OBSOLETE (struct next_fnfield *) xmalloc (sizeof (struct next_fnfield)); // OBSOLETE make_cleanup (xfree, new_sublist); // OBSOLETE memset (new_sublist, 0, sizeof (struct next_fnfield)); // OBSOLETE /* eat 1; from :;2A.; */ // OBSOLETE new_sublist->fn_field.type = SYMBOL_TYPE (ref_func); /* normally takes a read_type */ // OBSOLETE /* Make this type look like a method stub for gdb */ // OBSOLETE TYPE_FLAGS (new_sublist->fn_field.type) |= TYPE_FLAG_STUB; // OBSOLETE TYPE_CODE (new_sublist->fn_field.type) = TYPE_CODE_METHOD; // OBSOLETE /* If this is just a stub, then we don't have the real name here. */ // OBSOLETE if (TYPE_STUB (new_sublist->fn_field.type)) // OBSOLETE { // OBSOLETE if (!TYPE_DOMAIN_TYPE (new_sublist->fn_field.type)) // OBSOLETE TYPE_DOMAIN_TYPE (new_sublist->fn_field.type) = type; // OBSOLETE new_sublist->fn_field.is_stub = 1; // OBSOLETE } // OBSOLETE /* physname used later in mangling; eg PFs_i,5 for foo__1aFPFs_i // OBSOLETE physname gets strcat'd in order to recreate the onto mangled name */ // OBSOLETE pname = get_cfront_method_physname (fname); // OBSOLETE new_sublist->fn_field.physname = savestring (pname, strlen (pname)); // OBSOLETE /* Set this member function's visibility fields. // OBSOLETE Unable to distinguish access from stabs definition! // OBSOLETE Assuming public for now. FIXME! // OBSOLETE (for private, set new_sublist->fn_field.is_private = 1, // OBSOLETE for public, set new_sublist->fn_field.is_protected = 1) */ // OBSOLETE /* Unable to distinguish const/volatile from stabs definition! // OBSOLETE Assuming normal for now. FIXME! */ // OBSOLETE new_sublist->fn_field.is_const = 0; // OBSOLETE new_sublist->fn_field.is_volatile = 0; /* volatile not implemented in cfront */ // OBSOLETE /* Set virtual/static function info // OBSOLETE How to get vtable offsets ? // OBSOLETE Assuming normal for now FIXME!! // OBSOLETE For vtables, figure out from whence this virtual function came. // OBSOLETE It may belong to virtual function table of // OBSOLETE one of its baseclasses. // OBSOLETE set: // OBSOLETE new_sublist -> fn_field.voffset = vtable offset, // OBSOLETE new_sublist -> fn_field.fcontext = look_ahead_type; // OBSOLETE where look_ahead_type is type of baseclass */ // OBSOLETE if (is_static) // OBSOLETE new_sublist->fn_field.voffset = VOFFSET_STATIC; // OBSOLETE else /* normal member function. */ // OBSOLETE new_sublist->fn_field.voffset = 0; // OBSOLETE new_sublist->fn_field.fcontext = 0; // OBSOLETE /* Prepare new sublist */ // OBSOLETE new_sublist->next = sublist; // OBSOLETE sublist = new_sublist; // OBSOLETE length++; // OBSOLETE /* In g++, we loop thu sublists - now we set from functions. */ // OBSOLETE new_fnlist->fn_fieldlist.fn_fields = (struct fn_field *) // OBSOLETE obstack_alloc (&objfile->type_obstack, // OBSOLETE sizeof (struct fn_field) * length); // OBSOLETE memset (new_fnlist->fn_fieldlist.fn_fields, 0, // OBSOLETE sizeof (struct fn_field) * length); // OBSOLETE for (i = length; (i--, sublist); sublist = sublist->next) // OBSOLETE { // OBSOLETE new_fnlist->fn_fieldlist.fn_fields[i] = sublist->fn_field; // OBSOLETE } // OBSOLETE new_fnlist->fn_fieldlist.length = length; // OBSOLETE new_fnlist->next = fip->fnlist; // OBSOLETE fip->fnlist = new_fnlist; // OBSOLETE nfn_fields++; // OBSOLETE total_length += length; // OBSOLETE STABS_CONTINUE (pp, objfile); /* handle \\ */ // OBSOLETE } /* end of loop */ // OBSOLETE if (nfn_fields) // OBSOLETE { // OBSOLETE /* type should already have space */ // OBSOLETE TYPE_FN_FIELDLISTS (type) = (struct fn_fieldlist *) // OBSOLETE TYPE_ALLOC (type, sizeof (struct fn_fieldlist) * nfn_fields); // OBSOLETE memset (TYPE_FN_FIELDLISTS (type), 0, // OBSOLETE sizeof (struct fn_fieldlist) * nfn_fields); // OBSOLETE TYPE_NFN_FIELDS (type) = nfn_fields; // OBSOLETE TYPE_NFN_FIELDS_TOTAL (type) = total_length; // OBSOLETE } // OBSOLETE /* end of scope for reading member func */ // OBSOLETE /* eg: ";;" */ // OBSOLETE /* Skip trailing ';' and bump count of number of fields seen */ // OBSOLETE if (**pp == ';') // OBSOLETE (*pp)++; // OBSOLETE else // OBSOLETE return 0; // OBSOLETE return 1; // OBSOLETE } // OBSOLETE /* This routine fixes up partial cfront types that were created // OBSOLETE while parsing the stabs. The main need for this function is // OBSOLETE to add information such as methods to classes. // OBSOLETE Examples of "p": "sA;;__ct__1AFv foo__1AFv ;;;" */ // OBSOLETE int // OBSOLETE resolve_cfront_continuation (struct objfile *objfile, struct symbol *sym, // OBSOLETE char *p) // OBSOLETE { // OBSOLETE struct symbol *ref_sym = 0; // OBSOLETE char *sname; // OBSOLETE /* snarfed from read_struct_type */ // OBSOLETE struct field_info fi; // OBSOLETE struct type *type; // OBSOLETE struct cleanup *back_to; // OBSOLETE /* Need to make sure that fi isn't gunna conflict with struct // OBSOLETE in case struct already had some fnfs */ // OBSOLETE fi.list = NULL; // OBSOLETE fi.fnlist = NULL; // OBSOLETE back_to = make_cleanup (null_cleanup, 0); // OBSOLETE /* We only accept structs, classes and unions at the moment. // OBSOLETE Other continuation types include t (typedef), r (long dbl), ... // OBSOLETE We may want to add support for them as well; // OBSOLETE right now they are handled by duplicating the symbol information // OBSOLETE into the type information (see define_symbol) */ // OBSOLETE if (*p != 's' /* structs */ // OBSOLETE && *p != 'c' /* class */ // OBSOLETE && *p != 'u') /* union */ // OBSOLETE return 0; /* only handle C++ types */ // OBSOLETE p++; // OBSOLETE /* Get symbol typs name and validate // OBSOLETE eg: p = "A;;__ct__1AFv foo__1AFv ;;;" */ // OBSOLETE sname = get_substring (&p, ';'); // OBSOLETE if (!sname || strcmp (sname, SYMBOL_NAME (sym))) // OBSOLETE error ("Internal error: base symbol type name does not match\n"); // OBSOLETE /* Find symbol's internal gdb reference using demangled_name. // OBSOLETE This is the real sym that we want; // OBSOLETE sym was a temp hack to make debugger happy */ // OBSOLETE ref_sym = lookup_symbol (SYMBOL_NAME (sym), 0, STRUCT_NAMESPACE, 0, 0); // OBSOLETE type = SYMBOL_TYPE (ref_sym); // OBSOLETE /* Now read the baseclasses, if any, read the regular C struct or C++ // OBSOLETE class member fields, attach the fields to the type, read the C++ // OBSOLETE member functions, attach them to the type, and then read any tilde // OBSOLETE field (baseclass specifier for the class holding the main vtable). */ // OBSOLETE if (!read_cfront_baseclasses (&fi, &p, type, objfile) // OBSOLETE /* g++ does this next, but cfront already did this: // OBSOLETE || !read_struct_fields (&fi, &p, type, objfile) */ // OBSOLETE || !copy_cfront_struct_fields (&fi, type, objfile) // OBSOLETE || !read_cfront_member_functions (&fi, &p, type, objfile) // OBSOLETE || !read_cfront_static_fields (&fi, &p, type, objfile) // OBSOLETE || !attach_fields_to_type (&fi, type, objfile) // OBSOLETE || !attach_fn_fields_to_type (&fi, type) // OBSOLETE /* g++ does this next, but cfront doesn't seem to have this: // OBSOLETE || !read_tilde_fields (&fi, &p, type, objfile) */ // OBSOLETE ) // OBSOLETE { // OBSOLETE type = error_type (&p, objfile); // OBSOLETE } // OBSOLETE do_cleanups (back_to); // OBSOLETE return 0; // OBSOLETE } // OBSOLETE /* End of code added to support parsing of ARM/Cfront stabs strings */ #endif /* OBSOLETE CFront */ /* This routine fixes up symbol references/aliases to point to the original symbol definition. Returns 0 on failure, non-zero on success. */ static int resolve_symbol_reference (struct objfile *objfile, struct symbol *sym, char *p) { int refnum; struct symbol *ref_sym = 0; struct alias_list *alias; /* If this is not a symbol reference return now. */ if (*p != '#') return 0; /* Use "#<num>" as the name; we'll fix the name later. We stored the original symbol name as "#<id>=<name>" so we can now search for "#<id>" to resolving the reference. We'll fix the names later by removing the "#<id>" or "#<id>=" */ /*---------------------------------------------------------*/ /* Get the reference id number, and advance p past the names so we can parse the rest. eg: id=2 for p : "2=", "2=z:r(0,1)" "2:r(0,1);l(#5,#6),l(#7,#4)" */ /*---------------------------------------------------------*/ /* This gets reference name from string. sym may not have a name. */ /* Get the reference number associated with the reference id in the gdb stab string. From that reference number, get the main/primary symbol for this alias. */ refnum = process_reference (&p); ref_sym = ref_search (refnum); if (!ref_sym) { lrs_general_complaint ("symbol for reference not found"); return 0; } /* Parse the stab of the referencing symbol now that we have the referenced symbol. Add it as a new symbol and a link back to the referenced symbol. eg: p : "=", "=z:r(0,1)" ":r(0,1);l(#5,#6),l(#7,#4)" */ /* If the stab symbol table and string contain: RSYM 0 5 00000000 868 #15=z:r(0,1) LBRAC 0 0 00000000 899 #5= SLINE 0 16 00000003 923 #6= Then the same symbols can be later referenced by: RSYM 0 5 00000000 927 #15:r(0,1);l(#5,#6) This is used in live range splitting to: 1) specify that a symbol (#15) is actually just a new storage class for a symbol (#15=z) which was previously defined. 2) specify that the beginning and ending ranges for a symbol (#15) are the values of the beginning (#5) and ending (#6) symbols. */ /* Read number as reference id. eg: p : "=", "=z:r(0,1)" ":r(0,1);l(#5,#6),l(#7,#4)" */ /* FIXME! Might I want to use SYMBOL_CLASS (sym) = LOC_OPTIMIZED_OUT; in case of "l(0,0)"? */ /*--------------------------------------------------*/ /* Add this symbol to the reference list. */ /*--------------------------------------------------*/ alias = (struct alias_list *) obstack_alloc (&objfile->type_obstack, sizeof (struct alias_list)); if (!alias) { lrs_general_complaint ("Unable to allocate alias list memory"); return 0; } alias->next = 0; alias->sym = sym; if (!SYMBOL_ALIASES (ref_sym)) { SYMBOL_ALIASES (ref_sym) = alias; } else { struct alias_list *temp; /* Get to the end of the list. */ for (temp = SYMBOL_ALIASES (ref_sym); temp->next; temp = temp->next) ; temp->next = alias; } /* Want to fix up name so that other functions (eg. valops) will correctly print the name. Don't add_symbol_to_list so that lookup_symbol won't find it. nope... needed for fixups. */ SYMBOL_NAME (sym) = SYMBOL_NAME (ref_sym); /* Done! */ return 1; } /* Structure for storing pointers to reference definitions for fast lookup during "process_later". */ struct ref_map { char *stabs; CORE_ADDR value; struct symbol *sym; }; #define MAX_CHUNK_REFS 100 #define REF_CHUNK_SIZE (MAX_CHUNK_REFS * sizeof (struct ref_map)) #define REF_MAP_SIZE(ref_chunk) ((ref_chunk) * REF_CHUNK_SIZE) static struct ref_map *ref_map; /* Ptr to free cell in chunk's linked list. */ static int ref_count = 0; /* Number of chunks malloced. */ static int ref_chunk = 0; /* This file maintains a cache of stabs aliases found in the symbol table. If the symbol table changes, this cache must be cleared or we are left holding onto data in invalid obstacks. */ void stabsread_clear_cache (void) { ref_count = 0; ref_chunk = 0; } /* Create array of pointers mapping refids to symbols and stab strings. Add pointers to reference definition symbols and/or their values as we find them, using their reference numbers as our index. These will be used later when we resolve references. */ void ref_add (int refnum, struct symbol *sym, char *stabs, CORE_ADDR value) { if (ref_count == 0) ref_chunk = 0; if (refnum >= ref_count) ref_count = refnum + 1; if (ref_count > ref_chunk * MAX_CHUNK_REFS) { int new_slots = ref_count - ref_chunk * MAX_CHUNK_REFS; int new_chunks = new_slots / MAX_CHUNK_REFS + 1; ref_map = (struct ref_map *) xrealloc (ref_map, REF_MAP_SIZE (ref_chunk + new_chunks)); memset (ref_map + ref_chunk * MAX_CHUNK_REFS, 0, new_chunks * REF_CHUNK_SIZE); ref_chunk += new_chunks; } ref_map[refnum].stabs = stabs; ref_map[refnum].sym = sym; ref_map[refnum].value = value; } /* Return defined sym for the reference REFNUM. */ struct symbol * ref_search (int refnum) { if (refnum < 0 || refnum > ref_count) return 0; return ref_map[refnum].sym; } /* Return value for the reference REFNUM. */ static CORE_ADDR ref_search_value (int refnum) { if (refnum < 0 || refnum > ref_count) return 0; return ref_map[refnum].value; } /* Parse a reference id in STRING and return the resulting reference number. Move STRING beyond the reference id. */ static int process_reference (char **string) { char *p; int refnum = 0; if (**string != '#') return 0; /* Advance beyond the initial '#'. */ p = *string + 1; /* Read number as reference id. */ while (*p && isdigit (*p)) { refnum = refnum * 10 + *p - '0'; p++; } *string = p; return refnum; } /* If STRING defines a reference, store away a pointer to the reference definition for later use. Return the reference number. */ int symbol_reference_defined (char **string) { char *p = *string; int refnum = 0; refnum = process_reference (&p); /* Defining symbols end in '=' */ if (*p == '=') { /* Symbol is being defined here. */ *string = p + 1; return refnum; } else { /* Must be a reference. Either the symbol has already been defined, or this is a forward reference to it. */ *string = p; return -1; } } /* ARGSUSED */ struct symbol * define_symbol (CORE_ADDR valu, char *string, char *prefix, int desc, int type, struct objfile *objfile) { register struct symbol *sym; char *p = (char *) find_name_end (string); int deftype; int synonym = 0; register int i; /* We would like to eliminate nameless symbols, but keep their types. E.g. stab entry ":t10=*2" should produce a type 10, which is a pointer to type 2, but, should not create a symbol to address that type. Since the symbol will be nameless, there is no way any user can refer to it. */ int nameless; if (prefix == NULL) { prefix = ""; } /* Ignore syms with empty names. */ if (string[0] == 0) return 0; /* Ignore old-style symbols from cc -go */ if (p == 0) return 0; while (p[1] == ':') { p += 2; p = strchr (p, ':'); if (p == NULL) { STABS_CONTINUE (&p, objfile); p = strchr (p, ':'); } } /* If a nameless stab entry, all we need is the type, not the symbol. e.g. ":t10=*2" or a nameless enum like " :T16=ered:0,green:1,blue:2,;" */ nameless = (p == string || ((string[0] == ' ') && (string[1] == ':'))); current_symbol = sym = (struct symbol *) obstack_alloc (&objfile->symbol_obstack, sizeof (struct symbol)); memset (sym, 0, sizeof (struct symbol)); switch (type & N_TYPE) { case N_TEXT: SYMBOL_SECTION (sym) = SECT_OFF_TEXT (objfile); break; case N_DATA: SYMBOL_SECTION (sym) = SECT_OFF_DATA (objfile); break; case N_BSS: SYMBOL_SECTION (sym) = SECT_OFF_BSS (objfile); break; } if (processing_gcc_compilation) { /* GCC 2.x puts the line number in desc. SunOS apparently puts in the number of bytes occupied by a type or object, which we ignore. */ SYMBOL_LINE (sym) = desc; } else { SYMBOL_LINE (sym) = 0; /* unknown */ } if (is_cplus_marker (string[0])) { /* Special GNU C++ names. */ switch (string[1]) { case 't': SYMBOL_NAME (sym) = obsavestring ("this", strlen ("this"), &objfile->symbol_obstack); break; case 'v': /* $vtbl_ptr_type */ /* Was: SYMBOL_NAME (sym) = "vptr"; */ goto normal; case 'e': SYMBOL_NAME (sym) = obsavestring ("eh_throw", strlen ("eh_throw"), &objfile->symbol_obstack); break; case '_': /* This was an anonymous type that was never fixed up. */ goto normal; #ifdef STATIC_TRANSFORM_NAME case 'X': /* SunPRO (3.0 at least) static variable encoding. */ goto normal; #endif default: complaint (&symfile_complaints, "Unknown C++ symbol name `%s'", string); goto normal; /* Do *something* with it */ } } else if (string[0] == '#') { /* Special GNU C extension for referencing symbols. */ char *s; int refnum, nlen; /* If STRING defines a new reference id, then add it to the reference map. Else it must be referring to a previously defined symbol, so add it to the alias list of the previously defined symbol. */ s = string; refnum = symbol_reference_defined (&s); if (refnum >= 0) ref_add (refnum, sym, string, SYMBOL_VALUE (sym)); else if (!resolve_symbol_reference (objfile, sym, string)) return NULL; /* S..P contains the name of the symbol. We need to store the correct name into SYMBOL_NAME. */ nlen = p - s; if (refnum >= 0) { if (nlen > 0) { unsigned int prefixlen = strlen (prefix); SYMBOL_NAME (sym) = (char *) obstack_alloc (&objfile->symbol_obstack, nlen + prefixlen + 1); memcpy (SYMBOL_NAME (sym), prefix, prefixlen); memcpy (SYMBOL_NAME (sym) + prefixlen, s, nlen); SYMBOL_NAME (sym)[nlen + prefixlen] = '\0'; SYMBOL_INIT_DEMANGLED_NAME (sym, &objfile->symbol_obstack); } else /* FIXME! Want SYMBOL_NAME (sym) = 0; Get error if leave name 0. So give it something. */ { unsigned int prefixlen = strlen (prefix); nlen = p - string; SYMBOL_NAME (sym) = (char *) obstack_alloc (&objfile->symbol_obstack, nlen + prefixlen + 1); memcpy (SYMBOL_NAME (sym), string, nlen); SYMBOL_NAME (sym)[nlen] = '\0'; SYMBOL_INIT_DEMANGLED_NAME (sym, &objfile->symbol_obstack); } } /* Advance STRING beyond the reference id. */ string = s; } else { unsigned int prefixlen, nlen; normal: prefixlen = strlen (prefix); nlen = p - string; SYMBOL_LANGUAGE (sym) = current_subfile->language; SYMBOL_NAME (sym) = (char *) obstack_alloc (&objfile->symbol_obstack, nlen + prefixlen + 1); memcpy (SYMBOL_NAME (sym), prefix, prefixlen); memcpy (SYMBOL_NAME (sym) + prefixlen, string, nlen); SYMBOL_NAME (sym)[nlen + prefixlen] = '\0'; /* If this symbol is from a C++ compilation, then attempt to cache the demangled form for future reference. This is a typical time versus space tradeoff, that was decided in favor of time because it sped up C++ symbol lookups by a factor of about 20. */ SYMBOL_INIT_DEMANGLED_NAME (sym, &objfile->symbol_obstack); } p++; /* Determine the type of name being defined. */ #if 0 /* Getting GDB to correctly skip the symbol on an undefined symbol descriptor and not ever dump core is a very dodgy proposition if we do things this way. I say the acorn RISC machine can just fix their compiler. */ /* The Acorn RISC machine's compiler can put out locals that don't start with "234=" or "(3,4)=", so assume anything other than the deftypes we know how to handle is a local. */ if (!strchr ("cfFGpPrStTvVXCR", *p)) #else if (isdigit (*p) || *p == '(' || *p == '-') #endif deftype = 'l'; else deftype = *p++; switch (deftype) { case 'c': /* c is a special case, not followed by a type-number. SYMBOL:c=iVALUE for an integer constant symbol. SYMBOL:c=rVALUE for a floating constant symbol. SYMBOL:c=eTYPE,INTVALUE for an enum constant symbol. e.g. "b:c=e6,0" for "const b = blob1" (where type 6 is defined by "blobs:t6=eblob1:0,blob2:1,;"). */ if (*p != '=') { SYMBOL_CLASS (sym) = LOC_CONST; SYMBOL_TYPE (sym) = error_type (&p, objfile); SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE; add_symbol_to_list (sym, &file_symbols); return sym; } ++p; switch (*p++) { case 'r': { double d = atof (p); char *dbl_valu; /* FIXME-if-picky-about-floating-accuracy: Should be using target arithmetic to get the value. real.c in GCC probably has the necessary code. */ /* FIXME: lookup_fundamental_type is a hack. We should be creating a type especially for the type of float constants. Problem is, what type should it be? Also, what should the name of this type be? Should we be using 'S' constants (see stabs.texinfo) instead? */ SYMBOL_TYPE (sym) = lookup_fundamental_type (objfile, FT_DBL_PREC_FLOAT); dbl_valu = (char *) obstack_alloc (&objfile->symbol_obstack, TYPE_LENGTH (SYMBOL_TYPE (sym))); store_typed_floating (dbl_valu, SYMBOL_TYPE (sym), d); SYMBOL_VALUE_BYTES (sym) = dbl_valu; SYMBOL_CLASS (sym) = LOC_CONST_BYTES; } break; case 'i': { /* Defining integer constants this way is kind of silly, since 'e' constants allows the compiler to give not only the value, but the type as well. C has at least int, long, unsigned int, and long long as constant types; other languages probably should have at least unsigned as well as signed constants. */ /* We just need one int constant type for all objfiles. It doesn't depend on languages or anything (arguably its name should be a language-specific name for a type of that size, but I'm inclined to say that if the compiler wants a nice name for the type, it can use 'e'). */ static struct type *int_const_type; /* Yes, this is as long as a *host* int. That is because we use atoi. */ if (int_const_type == NULL) int_const_type = init_type (TYPE_CODE_INT, sizeof (int) * HOST_CHAR_BIT / TARGET_CHAR_BIT, 0, "integer constant", (struct objfile *) NULL); SYMBOL_TYPE (sym) = int_const_type; SYMBOL_VALUE (sym) = atoi (p); SYMBOL_CLASS (sym) = LOC_CONST; } break; case 'e': /* SYMBOL:c=eTYPE,INTVALUE for a constant symbol whose value can be represented as integral. e.g. "b:c=e6,0" for "const b = blob1" (where type 6 is defined by "blobs:t6=eblob1:0,blob2:1,;"). */ { SYMBOL_CLASS (sym) = LOC_CONST; SYMBOL_TYPE (sym) = read_type (&p, objfile); if (*p != ',') { SYMBOL_TYPE (sym) = error_type (&p, objfile); break; } ++p; /* If the value is too big to fit in an int (perhaps because it is unsigned), or something like that, we silently get a bogus value. The type and everything else about it is correct. Ideally, we should be using whatever we have available for parsing unsigned and long long values, however. */ SYMBOL_VALUE (sym) = atoi (p); } break; default: { SYMBOL_CLASS (sym) = LOC_CONST; SYMBOL_TYPE (sym) = error_type (&p, objfile); } } SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE; add_symbol_to_list (sym, &file_symbols); return sym; case 'C': /* The name of a caught exception. */ SYMBOL_TYPE (sym) = read_type (&p, objfile); SYMBOL_CLASS (sym) = LOC_LABEL; SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE; SYMBOL_VALUE_ADDRESS (sym) = valu; add_symbol_to_list (sym, &local_symbols); break; case 'f': /* A static function definition. */ SYMBOL_TYPE (sym) = read_type (&p, objfile); SYMBOL_CLASS (sym) = LOC_BLOCK; SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE; add_symbol_to_list (sym, &file_symbols); /* fall into process_function_types. */ process_function_types: /* Function result types are described as the result type in stabs. We need to convert this to the function-returning-type-X type in GDB. E.g. "int" is converted to "function returning int". */ if (TYPE_CODE (SYMBOL_TYPE (sym)) != TYPE_CODE_FUNC) SYMBOL_TYPE (sym) = lookup_function_type (SYMBOL_TYPE (sym)); /* All functions in C++ have prototypes. Stabs does not offer an explicit way to identify prototyped or unprototyped functions, but both GCC and Sun CC emit stabs for the "call-as" type rather than the "declared-as" type for unprototyped functions, so we treat all functions as if they were prototyped. This is used primarily for promotion when calling the function from GDB. */ TYPE_FLAGS (SYMBOL_TYPE (sym)) |= TYPE_FLAG_PROTOTYPED; /* fall into process_prototype_types */ process_prototype_types: /* Sun acc puts declared types of arguments here. */ if (*p == ';') { struct type *ftype = SYMBOL_TYPE (sym); int nsemi = 0; int nparams = 0; char *p1 = p; /* Obtain a worst case guess for the number of arguments by counting the semicolons. */ while (*p1) { if (*p1++ == ';') nsemi++; } /* Allocate parameter information fields and fill them in. */ TYPE_FIELDS (ftype) = (struct field *) TYPE_ALLOC (ftype, nsemi * sizeof (struct field)); while (*p++ == ';') { struct type *ptype; /* A type number of zero indicates the start of varargs. FIXME: GDB currently ignores vararg functions. */ if (p[0] == '0' && p[1] == '\0') break; ptype = read_type (&p, objfile); /* The Sun compilers mark integer arguments, which should be promoted to the width of the calling conventions, with a type which references itself. This type is turned into a TYPE_CODE_VOID type by read_type, and we have to turn it back into builtin_type_int here. FIXME: Do we need a new builtin_type_promoted_int_arg ? */ if (TYPE_CODE (ptype) == TYPE_CODE_VOID) ptype = builtin_type_int; TYPE_FIELD_TYPE (ftype, nparams) = ptype; TYPE_FIELD_ARTIFICIAL (ftype, nparams++) = 0; } TYPE_NFIELDS (ftype) = nparams; TYPE_FLAGS (ftype) |= TYPE_FLAG_PROTOTYPED; } break; case 'F': /* A global function definition. */ SYMBOL_TYPE (sym) = read_type (&p, objfile); SYMBOL_CLASS (sym) = LOC_BLOCK; SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE; add_symbol_to_list (sym, &global_symbols); goto process_function_types; case 'G': /* For a class G (global) symbol, it appears that the value is not correct. It is necessary to search for the corresponding linker definition to find the value. These definitions appear at the end of the namelist. */ SYMBOL_TYPE (sym) = read_type (&p, objfile); SYMBOL_CLASS (sym) = LOC_STATIC; SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE; /* Don't add symbol references to global_sym_chain. Symbol references don't have valid names and wont't match up with minimal symbols when the global_sym_chain is relocated. We'll fixup symbol references when we fixup the defining symbol. */ if (SYMBOL_NAME (sym) && SYMBOL_NAME (sym)[0] != '#') { i = hashname (SYMBOL_NAME (sym)); SYMBOL_VALUE_CHAIN (sym) = global_sym_chain[i]; global_sym_chain[i] = sym; } add_symbol_to_list (sym, &global_symbols); break; /* This case is faked by a conditional above, when there is no code letter in the dbx data. Dbx data never actually contains 'l'. */ case 's': case 'l': SYMBOL_TYPE (sym) = read_type (&p, objfile); SYMBOL_CLASS (sym) = LOC_LOCAL; SYMBOL_VALUE (sym) = valu; SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE; add_symbol_to_list (sym, &local_symbols); break; case 'p': if (*p == 'F') /* pF is a two-letter code that means a function parameter in Fortran. The type-number specifies the type of the return value. Translate it into a pointer-to-function type. */ { p++; SYMBOL_TYPE (sym) = lookup_pointer_type (lookup_function_type (read_type (&p, objfile))); } else SYMBOL_TYPE (sym) = read_type (&p, objfile); /* Normally this is a parameter, a LOC_ARG. On the i960, it can also be a LOC_LOCAL_ARG depending on symbol type. */ #ifndef DBX_PARM_SYMBOL_CLASS #define DBX_PARM_SYMBOL_CLASS(type) LOC_ARG #endif SYMBOL_CLASS (sym) = DBX_PARM_SYMBOL_CLASS (type); SYMBOL_VALUE (sym) = valu; SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE; add_symbol_to_list (sym, &local_symbols); if (TARGET_BYTE_ORDER != BFD_ENDIAN_BIG) { /* On little-endian machines, this crud is never necessary, and, if the extra bytes contain garbage, is harmful. */ break; } /* If it's gcc-compiled, if it says `short', believe it. */ if (processing_gcc_compilation || BELIEVE_PCC_PROMOTION) break; if (!BELIEVE_PCC_PROMOTION) { /* This is the signed type which arguments get promoted to. */ static struct type *pcc_promotion_type; /* This is the unsigned type which arguments get promoted to. */ static struct type *pcc_unsigned_promotion_type; /* Call it "int" because this is mainly C lossage. */ if (pcc_promotion_type == NULL) pcc_promotion_type = init_type (TYPE_CODE_INT, TARGET_INT_BIT / TARGET_CHAR_BIT, 0, "int", NULL); if (pcc_unsigned_promotion_type == NULL) pcc_unsigned_promotion_type = init_type (TYPE_CODE_INT, TARGET_INT_BIT / TARGET_CHAR_BIT, TYPE_FLAG_UNSIGNED, "unsigned int", NULL); if (BELIEVE_PCC_PROMOTION_TYPE) { /* This is defined on machines (e.g. sparc) where we should believe the type of a PCC 'short' argument, but shouldn't believe the address (the address is the address of the corresponding int). My guess is that this correction, as opposed to changing the parameter to an 'int' (as done below, for PCC on most machines), is the right thing to do on all machines, but I don't want to risk breaking something that already works. On most PCC machines, the sparc problem doesn't come up because the calling function has to zero the top bytes (not knowing whether the called function wants an int or a short), so there is little practical difference between an int and a short (except perhaps what happens when the GDB user types "print short_arg = 0x10000;"). Hacked for SunOS 4.1 by gnu@cygnus.com. In 4.1, the compiler actually produces the correct address (we don't need to fix it up). I made this code adapt so that it will offset the symbol if it was pointing at an int-aligned location and not otherwise. This way you can use the same gdb for 4.0.x and 4.1 systems. If the parameter is shorter than an int, and is integral (e.g. char, short, or unsigned equivalent), and is claimed to be passed on an integer boundary, don't believe it! Offset the parameter's address to the tail-end of that integer. */ if (TYPE_LENGTH (SYMBOL_TYPE (sym)) < TYPE_LENGTH (pcc_promotion_type) && TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_INT && 0 == SYMBOL_VALUE (sym) % TYPE_LENGTH (pcc_promotion_type)) { SYMBOL_VALUE (sym) += TYPE_LENGTH (pcc_promotion_type) - TYPE_LENGTH (SYMBOL_TYPE (sym)); } break; } else { /* If PCC says a parameter is a short or a char, it is really an int. */ if (TYPE_LENGTH (SYMBOL_TYPE (sym)) < TYPE_LENGTH (pcc_promotion_type) && TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_INT) { SYMBOL_TYPE (sym) = TYPE_UNSIGNED (SYMBOL_TYPE (sym)) ? pcc_unsigned_promotion_type : pcc_promotion_type; } break; } } case 'P': /* acc seems to use P to declare the prototypes of functions that are referenced by this file. gdb is not prepared to deal with this extra information. FIXME, it ought to. */ if (type == N_FUN) { SYMBOL_TYPE (sym) = read_type (&p, objfile); goto process_prototype_types; } /*FALLTHROUGH */ case 'R': /* Parameter which is in a register. */ SYMBOL_TYPE (sym) = read_type (&p, objfile); SYMBOL_CLASS (sym) = LOC_REGPARM; SYMBOL_VALUE (sym) = STAB_REG_TO_REGNUM (valu); if (SYMBOL_VALUE (sym) >= NUM_REGS + NUM_PSEUDO_REGS) { reg_value_complaint (SYMBOL_VALUE (sym), NUM_REGS + NUM_PSEUDO_REGS, SYMBOL_SOURCE_NAME (sym)); SYMBOL_VALUE (sym) = SP_REGNUM; /* Known safe, though useless */ } SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE; add_symbol_to_list (sym, &local_symbols); break; case 'r': /* Register variable (either global or local). */ SYMBOL_TYPE (sym) = read_type (&p, objfile); SYMBOL_CLASS (sym) = LOC_REGISTER; SYMBOL_VALUE (sym) = STAB_REG_TO_REGNUM (valu); if (SYMBOL_VALUE (sym) >= NUM_REGS + NUM_PSEUDO_REGS) { reg_value_complaint (SYMBOL_VALUE (sym), NUM_REGS + NUM_PSEUDO_REGS, SYMBOL_SOURCE_NAME (sym)); SYMBOL_VALUE (sym) = SP_REGNUM; /* Known safe, though useless */ } SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE; if (within_function) { /* Sun cc uses a pair of symbols, one 'p' and one 'r' with the same name to represent an argument passed in a register. GCC uses 'P' for the same case. So if we find such a symbol pair we combine it into one 'P' symbol. For Sun cc we need to do this regardless of REG_STRUCT_HAS_ADDR, because the compiler puts out the 'p' symbol even if it never saves the argument onto the stack. On most machines, we want to preserve both symbols, so that we can still get information about what is going on with the stack (VAX for computing args_printed, using stack slots instead of saved registers in backtraces, etc.). Note that this code illegally combines main(argc) struct foo argc; { register struct foo argc; } but this case is considered pathological and causes a warning from a decent compiler. */ if (local_symbols && local_symbols->nsyms > 0 #ifndef USE_REGISTER_NOT_ARG && REG_STRUCT_HAS_ADDR_P () && REG_STRUCT_HAS_ADDR (processing_gcc_compilation, SYMBOL_TYPE (sym)) && (TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_STRUCT || TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_UNION || TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_SET || TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_BITSTRING) #endif ) { struct symbol *prev_sym; prev_sym = local_symbols->symbol[local_symbols->nsyms - 1]; if ((SYMBOL_CLASS (prev_sym) == LOC_REF_ARG || SYMBOL_CLASS (prev_sym) == LOC_ARG) && STREQ (SYMBOL_NAME (prev_sym), SYMBOL_NAME (sym))) { SYMBOL_CLASS (prev_sym) = LOC_REGPARM; /* Use the type from the LOC_REGISTER; that is the type that is actually in that register. */ SYMBOL_TYPE (prev_sym) = SYMBOL_TYPE (sym); SYMBOL_VALUE (prev_sym) = SYMBOL_VALUE (sym); sym = prev_sym; break; } } add_symbol_to_list (sym, &local_symbols); } else add_symbol_to_list (sym, &file_symbols); break; case 'S': /* Static symbol at top level of file */ SYMBOL_TYPE (sym) = read_type (&p, objfile); SYMBOL_CLASS (sym) = LOC_STATIC; SYMBOL_VALUE_ADDRESS (sym) = valu; #ifdef STATIC_TRANSFORM_NAME if (IS_STATIC_TRANSFORM_NAME (SYMBOL_NAME (sym))) { struct minimal_symbol *msym; msym = lookup_minimal_symbol (SYMBOL_NAME (sym), NULL, objfile); if (msym != NULL) { SYMBOL_NAME (sym) = STATIC_TRANSFORM_NAME (SYMBOL_NAME (sym)); SYMBOL_VALUE_ADDRESS (sym) = SYMBOL_VALUE_ADDRESS (msym); } } #endif SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE; add_symbol_to_list (sym, &file_symbols); break; case 't': /* Typedef */ SYMBOL_TYPE (sym) = read_type (&p, objfile); /* For a nameless type, we don't want a create a symbol, thus we did not use `sym'. Return without further processing. */ if (nameless) return NULL; SYMBOL_CLASS (sym) = LOC_TYPEDEF; SYMBOL_VALUE (sym) = valu; SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE; /* C++ vagaries: we may have a type which is derived from a base type which did not have its name defined when the derived class was output. We fill in the derived class's base part member's name here in that case. */ if (TYPE_NAME (SYMBOL_TYPE (sym)) != NULL) if ((TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_STRUCT || TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_UNION) && TYPE_N_BASECLASSES (SYMBOL_TYPE (sym))) { int j; for (j = TYPE_N_BASECLASSES (SYMBOL_TYPE (sym)) - 1; j >= 0; j--) if (TYPE_BASECLASS_NAME (SYMBOL_TYPE (sym), j) == 0) TYPE_BASECLASS_NAME (SYMBOL_TYPE (sym), j) = type_name_no_tag (TYPE_BASECLASS (SYMBOL_TYPE (sym), j)); } if (TYPE_NAME (SYMBOL_TYPE (sym)) == NULL) { /* gcc-2.6 or later (when using -fvtable-thunks) emits a unique named type for a vtable entry. Some gdb code depends on that specific name. */ extern const char vtbl_ptr_name[]; if ((TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_PTR && strcmp (SYMBOL_NAME (sym), vtbl_ptr_name)) || TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_FUNC) { /* If we are giving a name to a type such as "pointer to foo" or "function returning foo", we better not set the TYPE_NAME. If the program contains "typedef char *caddr_t;", we don't want all variables of type char * to print as caddr_t. This is not just a consequence of GDB's type management; PCC and GCC (at least through version 2.4) both output variables of either type char * or caddr_t with the type number defined in the 't' symbol for caddr_t. If a future compiler cleans this up it GDB is not ready for it yet, but if it becomes ready we somehow need to disable this check (without breaking the PCC/GCC2.4 case). Sigh. Fortunately, this check seems not to be necessary for anything except pointers or functions. */ /* ezannoni: 2000-10-26. This seems to apply for versions of gcc older than 2.8. This was the original problem: with the following code gdb would tell that the type for name1 is caddr_t, and func is char() typedef char *caddr_t; char *name2; struct x { char *name1; } xx; char *func() { } main () {} */ /* Pascal accepts names for pointer types. */ if (current_subfile->language == language_pascal) { TYPE_NAME (SYMBOL_TYPE (sym)) = SYMBOL_NAME (sym); } } else TYPE_NAME (SYMBOL_TYPE (sym)) = SYMBOL_NAME (sym); } add_symbol_to_list (sym, &file_symbols); break; case 'T': /* Struct, union, or enum tag. For GNU C++, this can be be followed by 't' which means we are typedef'ing it as well. */ synonym = *p == 't'; if (synonym) p++; #if 0 /* OBSOLETE CFront */ // OBSOLETE /* The semantics of C++ state that "struct foo { ... }" also defines // OBSOLETE a typedef for "foo". Unfortunately, cfront never makes the typedef // OBSOLETE when translating C++ into C. We make the typedef here so that // OBSOLETE "ptype foo" works as expected for cfront translated code. */ // OBSOLETE else if ((current_subfile->language == language_cplus) // OBSOLETE || (current_subfile->language == language_objc)) // OBSOLETE synonym = 1; #endif /* OBSOLETE CFront */ SYMBOL_TYPE (sym) = read_type (&p, objfile); /* For a nameless type, we don't want a create a symbol, thus we did not use `sym'. Return without further processing. */ if (nameless) return NULL; SYMBOL_CLASS (sym) = LOC_TYPEDEF; SYMBOL_VALUE (sym) = valu; SYMBOL_NAMESPACE (sym) = STRUCT_NAMESPACE; if (TYPE_TAG_NAME (SYMBOL_TYPE (sym)) == 0) TYPE_TAG_NAME (SYMBOL_TYPE (sym)) = obconcat (&objfile->type_obstack, "", "", SYMBOL_NAME (sym)); add_symbol_to_list (sym, &file_symbols); if (synonym) { /* Clone the sym and then modify it. */ register struct symbol *typedef_sym = (struct symbol *) obstack_alloc (&objfile->symbol_obstack, sizeof (struct symbol)); *typedef_sym = *sym; SYMBOL_CLASS (typedef_sym) = LOC_TYPEDEF; SYMBOL_VALUE (typedef_sym) = valu; SYMBOL_NAMESPACE (typedef_sym) = VAR_NAMESPACE; if (TYPE_NAME (SYMBOL_TYPE (sym)) == 0) TYPE_NAME (SYMBOL_TYPE (sym)) = obconcat (&objfile->type_obstack, "", "", SYMBOL_NAME (sym)); add_symbol_to_list (typedef_sym, &file_symbols); } break; case 'V': /* Static symbol of local scope */ SYMBOL_TYPE (sym) = read_type (&p, objfile); SYMBOL_CLASS (sym) = LOC_STATIC; SYMBOL_VALUE_ADDRESS (sym) = valu; #ifdef STATIC_TRANSFORM_NAME if (IS_STATIC_TRANSFORM_NAME (SYMBOL_NAME (sym))) { struct minimal_symbol *msym; msym = lookup_minimal_symbol (SYMBOL_NAME (sym), NULL, objfile); if (msym != NULL) { SYMBOL_NAME (sym) = STATIC_TRANSFORM_NAME (SYMBOL_NAME (sym)); SYMBOL_VALUE_ADDRESS (sym) = SYMBOL_VALUE_ADDRESS (msym); } } #endif SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE; add_symbol_to_list (sym, &local_symbols); break; case 'v': /* Reference parameter */ SYMBOL_TYPE (sym) = read_type (&p, objfile); SYMBOL_CLASS (sym) = LOC_REF_ARG; SYMBOL_VALUE (sym) = valu; SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE; add_symbol_to_list (sym, &local_symbols); break; case 'a': /* Reference parameter which is in a register. */ SYMBOL_TYPE (sym) = read_type (&p, objfile); SYMBOL_CLASS (sym) = LOC_REGPARM_ADDR; SYMBOL_VALUE (sym) = STAB_REG_TO_REGNUM (valu); if (SYMBOL_VALUE (sym) >= NUM_REGS + NUM_PSEUDO_REGS) { reg_value_complaint (SYMBOL_VALUE (sym), NUM_REGS + NUM_PSEUDO_REGS, SYMBOL_SOURCE_NAME (sym)); SYMBOL_VALUE (sym) = SP_REGNUM; /* Known safe, though useless */ } SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE; add_symbol_to_list (sym, &local_symbols); break; case 'X': /* This is used by Sun FORTRAN for "function result value". Sun claims ("dbx and dbxtool interfaces", 2nd ed) that Pascal uses it too, but when I tried it Pascal used "x:3" (local symbol) instead. */ SYMBOL_TYPE (sym) = read_type (&p, objfile); SYMBOL_CLASS (sym) = LOC_LOCAL; SYMBOL_VALUE (sym) = valu; SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE; add_symbol_to_list (sym, &local_symbols); break; #if 0 /* OBSOLETE CFront */ // OBSOLETE /* New code added to support cfront stabs strings. // OBSOLETE Note: case 'P' already handled above */ // OBSOLETE case 'Z': // OBSOLETE /* Cfront type continuation coming up! // OBSOLETE Find the original definition and add to it. // OBSOLETE We'll have to do this for the typedef too, // OBSOLETE since we cloned the symbol to define a type in read_type. // OBSOLETE Stabs info examples: // OBSOLETE __1C :Ztl // OBSOLETE foo__1CFv :ZtF (first def foo__1CFv:F(0,3);(0,24)) // OBSOLETE C:ZsC;;__ct__1CFv func1__1CFv func2__1CFv ... ;;; // OBSOLETE where C is the name of the class. // OBSOLETE Unfortunately, we can't lookup the original symbol yet 'cuz // OBSOLETE we haven't finished reading all the symbols. // OBSOLETE Instead, we save it for processing later */ // OBSOLETE process_later (sym, p, resolve_cfront_continuation); // OBSOLETE SYMBOL_TYPE (sym) = error_type (&p, objfile); /* FIXME! change later */ // OBSOLETE SYMBOL_CLASS (sym) = LOC_CONST; // OBSOLETE SYMBOL_VALUE (sym) = 0; // OBSOLETE SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE; // OBSOLETE /* Don't add to list - we'll delete it later when // OBSOLETE we add the continuation to the real sym */ // OBSOLETE return sym; // OBSOLETE /* End of new code added to support cfront stabs strings */ #endif /* OBSOLETE CFront */ default: SYMBOL_TYPE (sym) = error_type (&p, objfile); SYMBOL_CLASS (sym) = LOC_CONST; SYMBOL_VALUE (sym) = 0; SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE; add_symbol_to_list (sym, &file_symbols); break; } /* When passing structures to a function, some systems sometimes pass the address in a register, not the structure itself. */ if (REG_STRUCT_HAS_ADDR_P () && REG_STRUCT_HAS_ADDR (processing_gcc_compilation, SYMBOL_TYPE (sym)) && (SYMBOL_CLASS (sym) == LOC_REGPARM || SYMBOL_CLASS (sym) == LOC_ARG)) { struct type *symbol_type = check_typedef (SYMBOL_TYPE (sym)); if ((TYPE_CODE (symbol_type) == TYPE_CODE_STRUCT) || (TYPE_CODE (symbol_type) == TYPE_CODE_UNION) || (TYPE_CODE (symbol_type) == TYPE_CODE_BITSTRING) || (TYPE_CODE (symbol_type) == TYPE_CODE_SET)) { /* If REG_STRUCT_HAS_ADDR yields non-zero we have to convert LOC_REGPARM to LOC_REGPARM_ADDR for structures and unions. */ if (SYMBOL_CLASS (sym) == LOC_REGPARM) SYMBOL_CLASS (sym) = LOC_REGPARM_ADDR; /* Likewise for converting LOC_ARG to LOC_REF_ARG (for the 7th and subsequent arguments on the sparc, for example). */ else if (SYMBOL_CLASS (sym) == LOC_ARG) SYMBOL_CLASS (sym) = LOC_REF_ARG; } } /* Is there more to parse? For example LRS/alias information? */ while (*p && *p == ';') { p++; if (*p && p[0] == 'l' && p[1] == '(') { /* GNU extensions for live range splitting may be appended to the end of the stab string. eg. "l(#1,#2);l(#3,#5)" */ /* Resolve the live range and add it to SYM's live range list. */ if (!resolve_live_range (objfile, sym, p)) return NULL; /* Find end of live range info. */ p = strchr (p, ')'); if (!*p || *p != ')') { lrs_general_complaint ("live range format not recognized"); return NULL; } p++; } } return sym; } /* Add the live range found in P to the symbol SYM in objfile OBJFILE. Returns non-zero on success, zero otherwise. */ static int resolve_live_range (struct objfile *objfile, struct symbol *sym, char *p) { int refnum; CORE_ADDR start, end; /* Sanity check the beginning of the stabs string. */ if (!*p || *p != 'l') { lrs_general_complaint ("live range string 1"); return 0; } p++; if (!*p || *p != '(') { lrs_general_complaint ("live range string 2"); return 0; } p++; /* Get starting value of range and advance P past the reference id. ?!? In theory, the process_reference should never fail, but we should catch that case just in case the compiler scrogged the stabs. */ refnum = process_reference (&p); start = ref_search_value (refnum); if (!start) { lrs_general_complaint ("Live range symbol not found 1"); return 0; } if (!*p || *p != ',') { lrs_general_complaint ("live range string 3"); return 0; } p++; /* Get ending value of range and advance P past the reference id. ?!? In theory, the process_reference should never fail, but we should catch that case just in case the compiler scrogged the stabs. */ refnum = process_reference (&p); end = ref_search_value (refnum); if (!end) { lrs_general_complaint ("Live range symbol not found 2"); return 0; } if (!*p || *p != ')') { lrs_general_complaint ("live range string 4"); return 0; } /* Now that we know the bounds of the range, add it to the symbol. */ add_live_range (objfile, sym, start, end); return 1; } /* Add a new live range defined by START and END to the symbol SYM in objfile OBJFILE. */ static void add_live_range (struct objfile *objfile, struct symbol *sym, CORE_ADDR start, CORE_ADDR end) { struct range_list *r, *rs; if (start >= end) { lrs_general_complaint ("end of live range follows start"); return; } /* Alloc new live range structure. */ r = (struct range_list *) obstack_alloc (&objfile->type_obstack, sizeof (struct range_list)); r->start = start; r->end = end; r->next = 0; /* Append this range to the symbol's range list. */ if (!SYMBOL_RANGES (sym)) SYMBOL_RANGES (sym) = r; else { /* Get the last range for the symbol. */ for (rs = SYMBOL_RANGES (sym); rs->next; rs = rs->next) ; rs->next = r; } } /* Skip rest of this symbol and return an error type. General notes on error recovery: error_type always skips to the end of the symbol (modulo cretinous dbx symbol name continuation). Thus code like this: if (*(*pp)++ != ';') return error_type (pp, objfile); is wrong because if *pp starts out pointing at '\0' (typically as the result of an earlier error), it will be incremented to point to the start of the next symbol, which might produce strange results, at least if you run off the end of the string table. Instead use if (**pp != ';') return error_type (pp, objfile); ++*pp; or if (**pp != ';') foo = error_type (pp, objfile); else ++*pp; And in case it isn't obvious, the point of all this hair is so the compiler can define new types and new syntaxes, and old versions of the debugger will be able to read the new symbol tables. */ static struct type * error_type (char **pp, struct objfile *objfile) { complaint (&symfile_complaints, "couldn't parse type; debugger out of date?"); while (1) { /* Skip to end of symbol. */ while (**pp != '\0') { (*pp)++; } /* Check for and handle cretinous dbx symbol name continuation! */ if ((*pp)[-1] == '\\' || (*pp)[-1] == '?') { *pp = next_symbol_text (objfile); } else { break; } } return (builtin_type_error); } /* Read type information or a type definition; return the type. Even though this routine accepts either type information or a type definition, the distinction is relevant--some parts of stabsread.c assume that type information starts with a digit, '-', or '(' in deciding whether to call read_type. */ struct type * read_type (register char **pp, struct objfile *objfile) { register struct type *type = 0; struct type *type1; int typenums[2]; char type_descriptor; /* Size in bits of type if specified by a type attribute, or -1 if there is no size attribute. */ int type_size = -1; /* Used to distinguish string and bitstring from char-array and set. */ int is_string = 0; /* Used to distinguish vector from array. */ int is_vector = 0; /* Read type number if present. The type number may be omitted. for instance in a two-dimensional array declared with type "ar1;1;10;ar1;1;10;4". */ if ((**pp >= '0' && **pp <= '9') || **pp == '(' || **pp == '-') { if (read_type_number (pp, typenums) != 0) return error_type (pp, objfile); /* Type is not being defined here. Either it already exists, or this is a forward reference to it. dbx_alloc_type handles both cases. */ if (**pp != '=') /* APPLE LOCAL: For built-in types, we haven't consumed the trailing semi-colon yet. If we don't do that, then cases where the built-in type is defined recursively will fall over. */ { if (typenums[0] == 0 && typenums[1] < 0) { if (**pp == ';') (*pp)++; } return dbx_alloc_type (typenums, objfile); } /* APPLE LOCAL END */ /* Type is being defined here. */ /* Skip the '='. Also skip the type descriptor - we get it below with (*pp)[-1]. */ (*pp) += 2; } else { /* 'typenums=' not present, type is anonymous. Read and return the definition, but don't put it in the type vector. */ typenums[0] = typenums[1] = -1; (*pp)++; } again: type_descriptor = (*pp)[-1]; switch (type_descriptor) { case 'x': { enum type_code code; /* Used to index through file_symbols. */ struct pending *ppt; int i; /* Name including "struct", etc. */ char *type_name; { char *from, *to, *p, *q1, *q2; /* Set the type code according to the following letter. */ switch ((*pp)[0]) { case 's': code = TYPE_CODE_STRUCT; break; case 'u': code = TYPE_CODE_UNION; break; case 'e': code = TYPE_CODE_ENUM; break; default: { /* Complain and keep going, so compilers can invent new cross-reference types. */ complaint (&symfile_complaints, "Unrecognized cross-reference type `%c'", (*pp)[0]); code = TYPE_CODE_STRUCT; break; } } q1 = strchr (*pp, '<'); p = strchr (*pp, ':'); if (p == NULL) return error_type (pp, objfile); if (q1 && p > q1 && p[1] == ':') { int nesting_level = 0; for (q2 = q1; *q2; q2++) { if (*q2 == '<') nesting_level++; else if (*q2 == '>') nesting_level--; else if (*q2 == ':' && nesting_level == 0) break; } p = q2; if (*p != ':') return error_type (pp, objfile); } to = type_name = (char *) obstack_alloc (&objfile->type_obstack, p - *pp + 1); /* Copy the name. */ from = *pp + 1; while (from < p) *to++ = *from++; *to = '\0'; /* Set the pointer ahead of the name which we just read, and the colon. */ *pp = from + 1; } /* Now check to see whether the type has already been declared. This was written for arrays of cross-referenced types before we had TYPE_CODE_TARGET_STUBBED, so I'm pretty sure it is not necessary anymore. But it might be a good idea, to save a little memory. */ for (ppt = file_symbols; ppt; ppt = ppt->next) for (i = 0; i < ppt->nsyms; i++) { struct symbol *sym = ppt->symbol[i]; if (SYMBOL_CLASS (sym) == LOC_TYPEDEF && SYMBOL_NAMESPACE (sym) == STRUCT_NAMESPACE && (TYPE_CODE (SYMBOL_TYPE (sym)) == code) && STREQ (SYMBOL_NAME (sym), type_name)) { obstack_free (&objfile->type_obstack, type_name); type = SYMBOL_TYPE (sym); return type; } } /* Didn't find the type to which this refers, so we must be dealing with a forward reference. Allocate a type structure for it, and keep track of it so we can fill in the rest of the fields when we get the full type. */ type = dbx_alloc_type (typenums, objfile); TYPE_CODE (type) = code; TYPE_TAG_NAME (type) = type_name; INIT_CPLUS_SPECIFIC (type); TYPE_FLAGS (type) |= TYPE_FLAG_STUB; add_undefined_type (type); return type; } case '-': /* RS/6000 built-in type */ case '0': case '1': case '2': case '3': case '4': case '5': case '6': case '7': case '8': case '9': case '(': (*pp)--; /* We deal with something like t(1,2)=(3,4)=... which the Lucid compiler and recent gcc versions (post 2.7.3) use. */ /* Allocate and enter the typedef type first. This handles recursive types. */ type = dbx_alloc_type (typenums, objfile); TYPE_CODE (type) = TYPE_CODE_TYPEDEF; { struct type *xtype = read_type (pp, objfile); if (type == xtype) { /* It's being defined as itself. That means it is "void". */ TYPE_CODE (type) = TYPE_CODE_VOID; TYPE_LENGTH (type) = 1; } else if (type_size >= 0 || is_string) { /* This is the absolute wrong way to construct types. Every other debug format has found a way around this problem and the related problems with unnecessarily stubbed types; someone motivated should attempt to clean up the issue here as well. Once a type pointed to has been created it should not be modified. Well, it's not *absolutely* wrong. Constructing recursive types (trees, linked lists) necessarily entails modifying types after creating them. Constructing any loop structure entails side effects. The Dwarf 2 reader does handle this more gracefully (it never constructs more than once instance of a type object, so it doesn't have to copy type objects wholesale), but it still mutates type objects after other folks have references to them. Keep in mind that this circularity/mutation issue shows up at the source language level, too: C's "incomplete types", for example. So the proper cleanup, I think, would be to limit GDB's type smashing to match exactly those required by the source language. So GDB could have a "complete_this_type" function, but never create unnecessary copies of a type otherwise. */ replace_type (type, xtype); TYPE_NAME (type) = NULL; TYPE_TAG_NAME (type) = NULL; } else { TYPE_FLAGS (type) |= TYPE_FLAG_TARGET_STUB; TYPE_TARGET_TYPE (type) = xtype; } } break; /* In the following types, we must be sure to overwrite any existing type that the typenums refer to, rather than allocating a new one and making the typenums point to the new one. This is because there may already be pointers to the existing type (if it had been forward-referenced), and we must change it to a pointer, function, reference, or whatever, *in-place*. */ case '*': /* Pointer to another type */ type1 = read_type (pp, objfile); type = make_pointer_type (type1, dbx_lookup_type (typenums, objfile)); break; case '&': /* Reference to another type */ type1 = read_type (pp, objfile); type = make_reference_type (type1, dbx_lookup_type (typenums, objfile)); break; case 'f': /* Function returning another type */ type1 = read_type (pp, objfile); type = make_function_type (type1, dbx_lookup_type (typenums, objfile)); break; case 'g': /* Prototyped function. (Sun) */ { /* Unresolved questions: - According to Sun's ``STABS Interface Manual'', for 'f' and 'F' symbol descriptors, a `0' in the argument type list indicates a varargs function. But it doesn't say how 'g' type descriptors represent that info. Someone with access to Sun's toolchain should try it out. - According to the comment in define_symbol (search for `process_prototype_types:'), Sun emits integer arguments as types which ref themselves --- like `void' types. Do we have to deal with that here, too? Again, someone with access to Sun's toolchain should try it out and let us know. */ const char *type_start = (*pp) - 1; struct type *return_type = read_type (pp, objfile); struct type *func_type = make_function_type (return_type, dbx_lookup_type (typenums, objfile)); struct type_list { struct type *type; struct type_list *next; } *arg_types = 0; int num_args = 0; while (**pp && **pp != '#') { struct type *arg_type = read_type (pp, objfile); struct type_list *new = alloca (sizeof (*new)); new->type = arg_type; new->next = arg_types; arg_types = new; num_args++; } if (**pp == '#') ++*pp; else { complaint (&symfile_complaints, "Prototyped function type didn't end arguments with `#':\n%s", type_start); } /* If there is just one argument whose type is `void', then that's just an empty argument list. */ if (arg_types && ! arg_types->next && TYPE_CODE (arg_types->type) == TYPE_CODE_VOID) num_args = 0; TYPE_FIELDS (func_type) = (struct field *) TYPE_ALLOC (func_type, num_args * sizeof (struct field)); memset (TYPE_FIELDS (func_type), 0, num_args * sizeof (struct field)); { int i; struct type_list *t; /* We stuck each argument type onto the front of the list when we read it, so the list is reversed. Build the fields array right-to-left. */ for (t = arg_types, i = num_args - 1; t; t = t->next, i--) TYPE_FIELD_TYPE (func_type, i) = t->type; } TYPE_NFIELDS (func_type) = num_args; TYPE_FLAGS (func_type) |= TYPE_FLAG_PROTOTYPED; type = func_type; break; } case 'k': /* Const qualifier on some type (Sun) */ type = read_type (pp, objfile); type = make_cv_type (1, TYPE_VOLATILE (type), type, dbx_lookup_type (typenums, objfile)); break; case 'B': /* Volatile qual on some type (Sun) */ type = read_type (pp, objfile); type = make_cv_type (TYPE_CONST (type), 1, type, dbx_lookup_type (typenums, objfile)); break; case '@': if (isdigit (**pp) || **pp == '(' || **pp == '-') { /* Member (class & variable) type */ /* FIXME -- we should be doing smash_to_XXX types here. */ struct type *domain = read_type (pp, objfile); struct type *memtype; if (**pp != ',') /* Invalid member type data format. */ return error_type (pp, objfile); ++*pp; memtype = read_type (pp, objfile); type = dbx_alloc_type (typenums, objfile); smash_to_member_type (type, domain, memtype); } else /* type attribute */ { char *attr = *pp; /* Skip to the semicolon. */ while (**pp != ';' && **pp != '\0') ++(*pp); if (**pp == '\0') return error_type (pp, objfile); else ++ * pp; /* Skip the semicolon. */ switch (*attr) { case 's': /* Size attribute */ type_size = atoi (attr + 1); if (type_size <= 0) type_size = -1; break; case 'S': /* String attribute */ /* FIXME: check to see if following type is array? */ is_string = 1; break; case 'V': /* Vector attribute */ /* FIXME: check to see if following type is array? */ is_vector = 1; break; default: /* Ignore unrecognized type attributes, so future compilers can invent new ones. */ break; } ++*pp; goto again; } break; case '#': /* Method (class & fn) type */ if ((*pp)[0] == '#') { /* We'll get the parameter types from the name. */ struct type *return_type; (*pp)++; return_type = read_type (pp, objfile); if (*(*pp)++ != ';') complaint (&symfile_complaints, "invalid (minimal) member type data format at symtab pos %d.", symnum); type = allocate_stub_method (return_type); if (typenums[0] != -1) *dbx_lookup_type (typenums, objfile) = type; } else { struct type *domain = read_type (pp, objfile); struct type *return_type; struct field *args; int nargs, varargs; if (**pp != ',') /* Invalid member type data format. */ return error_type (pp, objfile); else ++(*pp); return_type = read_type (pp, objfile); /* If we are defining a type within the argument list then there will be a closing ";" after the type def'n. Walk past it */ if ((*pp)[0] == ';' && (*pp)[1] == ',') { ++(*pp); } args = read_args (pp, ';', objfile, &nargs, &varargs); type = dbx_alloc_type (typenums, objfile); smash_to_method_type (type, domain, return_type, args, nargs, varargs); } break; case 'r': /* Range type */ type = read_range_type (pp, typenums, objfile); if (typenums[0] != -1) *dbx_lookup_type (typenums, objfile) = type; break; case 'b': { /* Sun ACC builtin int type */ type = read_sun_builtin_type (pp, typenums, objfile); if (typenums[0] != -1) *dbx_lookup_type (typenums, objfile) = type; } break; case 'R': /* Sun ACC builtin float type */ type = read_sun_floating_type (pp, typenums, objfile); if (typenums[0] != -1) *dbx_lookup_type (typenums, objfile) = type; break; case 'e': /* Enumeration type */ type = dbx_alloc_type (typenums, objfile); type = read_enum_type (pp, type, objfile); if (typenums[0] != -1) *dbx_lookup_type (typenums, objfile) = type; break; case 's': /* Struct type */ case 'u': /* Union type */ { enum type_code type_code = TYPE_CODE_UNDEF; type = dbx_alloc_type (typenums, objfile); switch (type_descriptor) { case 's': type_code = TYPE_CODE_STRUCT; break; case 'u': type_code = TYPE_CODE_UNION; break; } type = read_struct_type (pp, type, type_code, objfile); break; } case 'a': /* Array type */ if (**pp != 'r') return error_type (pp, objfile); ++*pp; type = dbx_alloc_type (typenums, objfile); type = read_array_type (pp, type, objfile); if (is_string) TYPE_CODE (type) = TYPE_CODE_STRING; if (is_vector) TYPE_FLAGS (type) |= TYPE_FLAG_VECTOR; break; case 'S': /* Set or bitstring type */ type1 = read_type (pp, objfile); type = create_set_type ((struct type *) NULL, type1); if (is_string) TYPE_CODE (type) = TYPE_CODE_BITSTRING; if (typenums[0] != -1) *dbx_lookup_type (typenums, objfile) = type; break; default: --*pp; /* Go back to the symbol in error */ /* Particularly important if it was \0! */ return error_type (pp, objfile); } if (type == 0) { warning ("GDB internal error, type is NULL in stabsread.c\n"); return error_type (pp, objfile); } /* Size specified in a type attribute overrides any other size. */ if (type_size != -1) TYPE_LENGTH (type) = (type_size + TARGET_CHAR_BIT - 1) / TARGET_CHAR_BIT; return type; } /* RS/6000 xlc/dbx combination uses a set of builtin types, starting from -1. Return the proper type node for a given builtin type number. */ static struct type * rs6000_builtin_type (int typenum, struct objfile *objfile) { /* We recognize types numbered from -NUMBER_RECOGNIZED to -1. */ #define NUMBER_RECOGNIZED 34 /* This includes an empty slot for type number -0. */ static struct type *negative_types[NUMBER_RECOGNIZED + 1]; struct type *rettype = NULL; if (typenum >= 0 || typenum < -NUMBER_RECOGNIZED) { complaint (&symfile_complaints, "Unknown builtin type %d", typenum); return builtin_type_error; } if (negative_types[-typenum] != NULL) return negative_types[-typenum]; #if TARGET_CHAR_BIT != 8 #error This code wrong for TARGET_CHAR_BIT not 8 /* These definitions all assume that TARGET_CHAR_BIT is 8. I think that if that ever becomes not true, the correct fix will be to make the size in the struct type to be in bits, not in units of TARGET_CHAR_BIT. */ #endif switch (-typenum) { case 1: /* The size of this and all the other types are fixed, defined by the debugging format. If there is a type called "int" which is other than 32 bits, then it should use a new negative type number (or avoid negative type numbers for that case). See stabs.texinfo. */ rettype = init_type (TYPE_CODE_INT, 4, 0, "int", objfile); break; case 2: rettype = init_type (TYPE_CODE_INT, 1, 0, "char", objfile); break; case 3: rettype = init_type (TYPE_CODE_INT, 2, 0, "short", objfile); break; case 4: rettype = init_type (TYPE_CODE_INT, 4, 0, "long", objfile); break; case 5: rettype = init_type (TYPE_CODE_INT, 1, TYPE_FLAG_UNSIGNED, "unsigned char", objfile); break; case 6: rettype = init_type (TYPE_CODE_INT, 1, 0, "signed char", objfile); break; case 7: rettype = init_type (TYPE_CODE_INT, 2, TYPE_FLAG_UNSIGNED, "unsigned short", objfile); break; case 8: rettype = init_type (TYPE_CODE_INT, 4, TYPE_FLAG_UNSIGNED, "unsigned int", objfile); break; case 9: rettype = init_type (TYPE_CODE_INT, 4, TYPE_FLAG_UNSIGNED, "unsigned", objfile); case 10: rettype = init_type (TYPE_CODE_INT, 4, TYPE_FLAG_UNSIGNED, "unsigned long", objfile); break; case 11: rettype = init_type (TYPE_CODE_VOID, 1, 0, "void", objfile); break; case 12: /* IEEE single precision (32 bit). */ rettype = init_type (TYPE_CODE_FLT, 4, 0, "float", objfile); break; case 13: /* IEEE double precision (64 bit). */ rettype = init_type (TYPE_CODE_FLT, 8, 0, "double", objfile); break; case 14: /* This is an IEEE double on the RS/6000, and different machines with different sizes for "long double" should use different negative type numbers. See stabs.texinfo. */ rettype = init_type (TYPE_CODE_FLT, 8, 0, "long double", objfile); break; case 15: rettype = init_type (TYPE_CODE_INT, 4, 0, "integer", objfile); break; case 16: rettype = init_type (TYPE_CODE_BOOL, 4, TYPE_FLAG_UNSIGNED, "boolean", objfile); break; case 17: rettype = init_type (TYPE_CODE_FLT, 4, 0, "short real", objfile); break; case 18: rettype = init_type (TYPE_CODE_FLT, 8, 0, "real", objfile); break; case 19: rettype = init_type (TYPE_CODE_ERROR, 0, 0, "stringptr", objfile); break; case 20: rettype = init_type (TYPE_CODE_CHAR, 1, TYPE_FLAG_UNSIGNED, "character", objfile); break; case 21: rettype = init_type (TYPE_CODE_BOOL, 1, TYPE_FLAG_UNSIGNED, "logical*1", objfile); break; case 22: rettype = init_type (TYPE_CODE_BOOL, 2, TYPE_FLAG_UNSIGNED, "logical*2", objfile); break; case 23: rettype = init_type (TYPE_CODE_BOOL, 4, TYPE_FLAG_UNSIGNED, "logical*4", objfile); break; case 24: rettype = init_type (TYPE_CODE_BOOL, 4, TYPE_FLAG_UNSIGNED, "logical", objfile); break; case 25: /* Complex type consisting of two IEEE single precision values. */ rettype = init_type (TYPE_CODE_COMPLEX, 8, 0, "complex", objfile); TYPE_TARGET_TYPE (rettype) = init_type (TYPE_CODE_FLT, 4, 0, "float", NULL); break; case 26: /* Complex type consisting of two IEEE double precision values. */ rettype = init_type (TYPE_CODE_COMPLEX, 16, 0, "double complex", objfile); TYPE_TARGET_TYPE (rettype) = init_type (TYPE_CODE_FLT, 8, 0, "double", NULL); break; case 27: rettype = init_type (TYPE_CODE_INT, 1, 0, "integer*1", objfile); break; case 28: rettype = init_type (TYPE_CODE_INT, 2, 0, "integer*2", objfile); break; case 29: rettype = init_type (TYPE_CODE_INT, 4, 0, "integer*4", objfile); break; case 30: rettype = init_type (TYPE_CODE_CHAR, 2, 0, "wchar", objfile); break; case 31: rettype = init_type (TYPE_CODE_INT, 8, 0, "long long", objfile); break; case 32: rettype = init_type (TYPE_CODE_INT, 8, TYPE_FLAG_UNSIGNED, "unsigned long long", objfile); break; case 33: rettype = init_type (TYPE_CODE_INT, 8, TYPE_FLAG_UNSIGNED, "logical*8", objfile); break; case 34: rettype = init_type (TYPE_CODE_INT, 8, 0, "integer*8", objfile); break; } /* negative_types[-typenum] = rettype; */ return rettype; } /* This page contains subroutines of read_type. */ /* Replace *OLD_NAME with the method name portion of PHYSNAME. */ static void update_method_name_from_physname (struct obstack *obstack, char **old_name, char *physname) { char *method_name; method_name = method_name_from_physname (physname); if (method_name == NULL) { complaint (&symfile_complaints, "Method has bad physname %s\n", physname); return; } if (strcmp (*old_name, method_name) != 0) *old_name = obsavestring (method_name, strlen (method_name), obstack); xfree (method_name); } /* Read member function stabs info for C++ classes. The form of each member function data is: NAME :: TYPENUM[=type definition] ARGS : PHYSNAME ; An example with two member functions is: afunc1::20=##15;:i;2A.;afunc2::20:i;2A.; For the case of overloaded operators, the format is op$::*.funcs, where $ is the CPLUS_MARKER (usually '$'), `*' holds the place for an operator name (such as `+=') and `.' marks the end of the operator name. Returns 1 for success, 0 for failure. */ static int read_member_functions (struct field_info *fip, char **pp, struct type *type, struct objfile *objfile) { int nfn_fields = 0; int length = 0; /* Total number of member functions defined in this class. If the class defines two `f' functions, and one `g' function, then this will have the value 3. */ int total_length = 0; int i; struct next_fnfield { struct next_fnfield *next; struct fn_field fn_field; } *sublist; struct type *look_ahead_type; struct next_fnfieldlist *new_fnlist; struct next_fnfield *new_sublist; char *main_fn_name; register char *p; /* Process each list until we find something that is not a member function or find the end of the functions. */ while (**pp != ';') { /* We should be positioned at the start of the function name. Scan forward to find the first ':' and if it is not the first of a "::" delimiter, then this is not a member function. */ p = *pp; while (*p != ':') { p++; } if (p[1] != ':') { break; } sublist = NULL; look_ahead_type = NULL; length = 0; new_fnlist = (struct next_fnfieldlist *) xmalloc (sizeof (struct next_fnfieldlist)); make_cleanup (xfree, new_fnlist); memset (new_fnlist, 0, sizeof (struct next_fnfieldlist)); if ((*pp)[0] == 'o' && (*pp)[1] == 'p' && is_cplus_marker ((*pp)[2])) { /* This is a completely wierd case. In order to stuff in the names that might contain colons (the usual name delimiter), Mike Tiemann defined a different name format which is signalled if the identifier is "op$". In that case, the format is "op$::XXXX." where XXXX is the name. This is used for names like "+" or "=". YUUUUUUUK! FIXME! */ /* This lets the user type "break operator+". We could just put in "+" as the name, but that wouldn't work for "*". */ static char opname[32] = "op$"; char *o = opname + 3; /* Skip past '::'. */ *pp = p + 2; STABS_CONTINUE (pp, objfile); p = *pp; while (*p != '.') { *o++ = *p++; } main_fn_name = savestring (opname, o - opname); /* Skip past '.' */ *pp = p + 1; } else { main_fn_name = savestring (*pp, p - *pp); /* Skip past '::'. */ *pp = p + 2; } new_fnlist->fn_fieldlist.name = obsavestring (main_fn_name, strlen (main_fn_name), &objfile->type_obstack); do { new_sublist = (struct next_fnfield *) xmalloc (sizeof (struct next_fnfield)); make_cleanup (xfree, new_sublist); memset (new_sublist, 0, sizeof (struct next_fnfield)); /* Check for and handle cretinous dbx symbol name continuation! */ if (look_ahead_type == NULL) { /* Normal case. */ STABS_CONTINUE (pp, objfile); new_sublist->fn_field.type = read_type (pp, objfile); if (**pp != ':') { /* Invalid symtab info for member function. */ return 0; } } else { /* g++ version 1 kludge */ new_sublist->fn_field.type = look_ahead_type; look_ahead_type = NULL; } (*pp)++; p = *pp; while (*p != ';') { p++; } /* If this is just a stub, then we don't have the real name here. */ if (TYPE_STUB (new_sublist->fn_field.type)) { if (!TYPE_DOMAIN_TYPE (new_sublist->fn_field.type)) TYPE_DOMAIN_TYPE (new_sublist->fn_field.type) = type; new_sublist->fn_field.is_stub = 1; } new_sublist->fn_field.physname = obsavestring (*pp, p - *pp, &objfile->type_obstack); *pp = p + 1; /* Set this member function's visibility fields. */ switch (*(*pp)++) { case VISIBILITY_PRIVATE: new_sublist->fn_field.is_private = 1; break; case VISIBILITY_PROTECTED: new_sublist->fn_field.is_protected = 1; break; } STABS_CONTINUE (pp, objfile); switch (**pp) { case 'A': /* Normal functions. */ new_sublist->fn_field.is_const = 0; new_sublist->fn_field.is_volatile = 0; (*pp)++; break; case 'B': /* `const' member functions. */ new_sublist->fn_field.is_const = 1; new_sublist->fn_field.is_volatile = 0; (*pp)++; break; case 'C': /* `volatile' member function. */ new_sublist->fn_field.is_const = 0; new_sublist->fn_field.is_volatile = 1; (*pp)++; break; case 'D': /* `const volatile' member function. */ new_sublist->fn_field.is_const = 1; new_sublist->fn_field.is_volatile = 1; (*pp)++; break; case '*': /* File compiled with g++ version 1 -- no info */ case '?': case '.': break; default: complaint (&symfile_complaints, "const/volatile indicator missing, got '%c'", **pp); break; } switch (*(*pp)++) { case '*': { int nbits; /* virtual member function, followed by index. The sign bit is set to distinguish pointers-to-methods from virtual function indicies. Since the array is in words, the quantity must be shifted left by 1 on 16 bit machine, and by 2 on 32 bit machine, forcing the sign bit out, and usable as a valid index into the array. Remove the sign bit here. */ new_sublist->fn_field.voffset = (0x7fffffff & read_huge_number (pp, ';', &nbits)) + 2; if (nbits != 0) return 0; STABS_CONTINUE (pp, objfile); if (**pp == ';' || **pp == '\0') { /* Must be g++ version 1. */ new_sublist->fn_field.fcontext = 0; } else { /* Figure out from whence this virtual function came. It may belong to virtual function table of one of its baseclasses. */ look_ahead_type = read_type (pp, objfile); if (**pp == ':') { /* g++ version 1 overloaded methods. */ } else { new_sublist->fn_field.fcontext = look_ahead_type; if (**pp != ';') { return 0; } else { ++*pp; } look_ahead_type = NULL; } } break; } case '?': /* static member function. */ { int slen = strlen (main_fn_name); new_sublist->fn_field.voffset = VOFFSET_STATIC; /* For static member functions, we can't tell if they are stubbed, as they are put out as functions, and not as methods. GCC v2 emits the fully mangled name if dbxout.c:flag_minimal_debug is not set, so we have to detect a fully mangled physname here and set is_stub accordingly. Fully mangled physnames in v2 start with the member function name, followed by two underscores. GCC v3 currently always emits stubbed member functions, but with fully mangled physnames, which start with _Z. */ if (!(strncmp (new_sublist->fn_field.physname, main_fn_name, slen) == 0 && new_sublist->fn_field.physname[slen] == '_' && new_sublist->fn_field.physname[slen + 1] == '_')) { new_sublist->fn_field.is_stub = 1; } break; } default: /* error */ complaint (&symfile_complaints, "member function type missing, got '%c'", (*pp)[-1]); /* Fall through into normal member function. */ case '.': /* normal member function. */ new_sublist->fn_field.voffset = 0; new_sublist->fn_field.fcontext = 0; break; } new_sublist->next = sublist; sublist = new_sublist; length++; STABS_CONTINUE (pp, objfile); } while (**pp != ';' && **pp != '\0'); (*pp)++; STABS_CONTINUE (pp, objfile); /* Skip GCC 3.X member functions which are duplicates of the callable constructor/destructor. */ if (strcmp (main_fn_name, "__base_ctor") == 0 || strcmp (main_fn_name, "__base_dtor") == 0 || strcmp (main_fn_name, "__deleting_dtor") == 0) { xfree (main_fn_name); } else { /* APPLE LOCAL: This code is of marginal value for gcc 3, and has horrible performance. Until it is made to perform better, we should just not use it */ #if 0 int has_stub = 0; int has_destructor = 0, has_other = 0; int is_v3 = 0; struct next_fnfield *tmp_sublist; /* Various versions of GCC emit various mostly-useless strings in the name field for special member functions. For stub methods, we need to defer correcting the name until we are ready to unstub the method, because the current name string is used by gdb_mangle_name. The only stub methods of concern here are GNU v2 operators; other methods have their names correct (see caveat below). For non-stub methods, in GNU v3, we have a complete physname. Therefore we can safely correct the name now. This primarily affects constructors and destructors, whose name will be __comp_ctor or __comp_dtor instead of Foo or ~Foo. Cast operators will also have incorrect names; for instance, "operator int" will be named "operator i" (i.e. the type is mangled). For non-stub methods in GNU v2, we have no easy way to know if we have a complete physname or not. For most methods the result depends on the platform (if CPLUS_MARKER can be `$' or `.', it will use minimal debug information, or otherwise the full physname will be included). Rather than dealing with this, we take a different approach. For v3 mangled names, we can use the full physname; for v2, we use cplus_demangle_opname (which is actually v2 specific), because the only interesting names are all operators - once again barring the caveat below. Skip this process if any method in the group is a stub, to prevent our fouling up the workings of gdb_mangle_name. The caveat: GCC 2.95.x (and earlier?) put constructors and destructors in the same method group. We need to split this into two groups, because they should have different names. So for each method group we check whether it contains both routines whose physname appears to be a destructor (the physnames for and destructors are always provided, due to quirks in v2 mangling) and routines whose physname does not appear to be a destructor. If so then we break up the list into two halves. Even if the constructors and destructors aren't in the same group the destructor will still lack the leading tilde, so that also needs to be fixed. So, to summarize what we expect and handle here: Given Given Real Real Action method name physname physname method name __opi [none] __opi__3Foo operator int opname [now or later] Foo _._3Foo _._3Foo ~Foo separate and rename operator i _ZN3FoocviEv _ZN3FoocviEv operator int demangle __comp_ctor _ZN3FooC1ERKS_ _ZN3FooC1ERKS_ Foo demangle */ tmp_sublist = sublist; while (tmp_sublist != NULL) { if (tmp_sublist->fn_field.is_stub) has_stub = 1; if (tmp_sublist->fn_field.physname[0] == '_' && tmp_sublist->fn_field.physname[1] == 'Z') is_v3 = 1; if (is_destructor_name (tmp_sublist->fn_field.physname)) has_destructor++; else has_other++; tmp_sublist = tmp_sublist->next; } if (has_destructor && has_other) { struct next_fnfieldlist *destr_fnlist; struct next_fnfield *last_sublist; /* Create a new fn_fieldlist for the destructors. */ destr_fnlist = (struct next_fnfieldlist *) xmalloc (sizeof (struct next_fnfieldlist)); make_cleanup (xfree, destr_fnlist); memset (destr_fnlist, 0, sizeof (struct next_fnfieldlist)); destr_fnlist->fn_fieldlist.name = obconcat (&objfile->type_obstack, "", "~", new_fnlist->fn_fieldlist.name); destr_fnlist->fn_fieldlist.fn_fields = (struct fn_field *) obstack_alloc (&objfile->type_obstack, sizeof (struct fn_field) * has_destructor); memset (destr_fnlist->fn_fieldlist.fn_fields, 0, sizeof (struct fn_field) * has_destructor); tmp_sublist = sublist; last_sublist = NULL; i = 0; while (tmp_sublist != NULL) { if (!is_destructor_name (tmp_sublist->fn_field.physname)) { tmp_sublist = tmp_sublist->next; continue; } destr_fnlist->fn_fieldlist.fn_fields[i++] = tmp_sublist->fn_field; if (last_sublist) last_sublist->next = tmp_sublist->next; else sublist = tmp_sublist->next; last_sublist = tmp_sublist; tmp_sublist = tmp_sublist->next; } destr_fnlist->fn_fieldlist.length = has_destructor; destr_fnlist->next = fip->fnlist; fip->fnlist = destr_fnlist; nfn_fields++; total_length += has_destructor; length -= has_destructor; } else if (is_v3) { /* v3 mangling prevents the use of abbreviated physnames, so we can do this here. There are stubbed methods in v3 only: - in -gstabs instead of -gstabs+ - or for static methods, which are output as a function type instead of a method type. */ update_method_name_from_physname (&objfile->type_obstack, &new_fnlist->fn_fieldlist.name, sublist->fn_field.physname); } else if (has_destructor && new_fnlist->fn_fieldlist.name[0] != '~') { new_fnlist->fn_fieldlist.name = obconcat (&objfile->type_obstack, "~", main_fn_name, ""); xfree (main_fn_name); } else if (!has_stub) { char dem_opname[256]; int ret; ret = cplus_demangle_opname (new_fnlist->fn_fieldlist.name, dem_opname, DMGL_ANSI); if (!ret) ret = cplus_demangle_opname (new_fnlist->fn_fieldlist.name, dem_opname, 0); if (ret) new_fnlist->fn_fieldlist.name = obsavestring (dem_opname, strlen (dem_opname), &objfile->type_obstack); } #endif /* APPLE LOCAL */ new_fnlist->fn_fieldlist.fn_fields = (struct fn_field *) obstack_alloc (&objfile->type_obstack, sizeof (struct fn_field) * length); memset (new_fnlist->fn_fieldlist.fn_fields, 0, sizeof (struct fn_field) * length); for (i = length; (i--, sublist); sublist = sublist->next) { new_fnlist->fn_fieldlist.fn_fields[i] = sublist->fn_field; } new_fnlist->fn_fieldlist.length = length; new_fnlist->next = fip->fnlist; fip->fnlist = new_fnlist; nfn_fields++; total_length += length; } } if (nfn_fields) { ALLOCATE_CPLUS_STRUCT_TYPE (type); TYPE_FN_FIELDLISTS (type) = (struct fn_fieldlist *) TYPE_ALLOC (type, sizeof (struct fn_fieldlist) * nfn_fields); memset (TYPE_FN_FIELDLISTS (type), 0, sizeof (struct fn_fieldlist) * nfn_fields); TYPE_NFN_FIELDS (type) = nfn_fields; TYPE_NFN_FIELDS_TOTAL (type) = total_length; } return 1; } /* Special GNU C++ name. Returns 1 for success, 0 for failure. "failure" means that we can't keep parsing and it's time for error_type(). */ static int read_cpp_abbrev (struct field_info *fip, char **pp, struct type *type, struct objfile *objfile) { register char *p; char *name; char cpp_abbrev; struct type *context; p = *pp; if (*++p == 'v') { name = NULL; cpp_abbrev = *++p; *pp = p + 1; /* At this point, *pp points to something like "22:23=*22...", where the type number before the ':' is the "context" and everything after is a regular type definition. Lookup the type, find it's name, and construct the field name. */ context = read_type (pp, objfile); switch (cpp_abbrev) { case 'f': /* $vf -- a virtual function table pointer */ name = type_name_no_tag (context); if (name == NULL) { name = ""; } fip->list->field.name = obconcat (&objfile->type_obstack, vptr_name, name, ""); break; case 'b': /* $vb -- a virtual bsomethingorother */ name = type_name_no_tag (context); if (name == NULL) { complaint (&symfile_complaints, "C++ abbreviated type name unknown at symtab pos %d", symnum); name = "FOO"; } fip->list->field.name = obconcat (&objfile->type_obstack, vb_name, name, ""); break; default: invalid_cpp_abbrev_complaint (*pp); fip->list->field.name = obconcat (&objfile->type_obstack, "INVALID_CPLUSPLUS_ABBREV", "", ""); break; } /* At this point, *pp points to the ':'. Skip it and read the field type. */ p = ++(*pp); if (p[-1] != ':') { invalid_cpp_abbrev_complaint (*pp); return 0; } fip->list->field.type = read_type (pp, objfile); if (**pp == ',') (*pp)++; /* Skip the comma. */ else return 0; { int nbits; FIELD_BITPOS (fip->list->field) = read_huge_number (pp, ';', &nbits); if (nbits != 0) return 0; } /* This field is unpacked. */ FIELD_BITSIZE (fip->list->field) = 0; fip->list->visibility = VISIBILITY_PRIVATE; } else { invalid_cpp_abbrev_complaint (*pp); /* We have no idea what syntax an unrecognized abbrev would have, so better return 0. If we returned 1, we would need to at least advance *pp to avoid an infinite loop. */ return 0; } return 1; } static void read_one_struct_field (struct field_info *fip, char **pp, char *p, struct type *type, struct objfile *objfile) { #if 0 /* OBSOLETE CFront */ // OBSOLETE /* The following is code to work around cfront generated stabs. // OBSOLETE The stabs contains full mangled name for each field. // OBSOLETE We try to demangle the name and extract the field name out of it. // OBSOLETE */ // OBSOLETE if (ARM_DEMANGLING && current_subfile->language == language_cplus) // OBSOLETE { // OBSOLETE char save_p; // OBSOLETE char *dem, *dem_p; // OBSOLETE save_p = *p; // OBSOLETE *p = '\0'; // OBSOLETE dem = cplus_demangle (*pp, DMGL_ANSI | DMGL_PARAMS); // OBSOLETE if (dem != NULL) // OBSOLETE { // OBSOLETE dem_p = strrchr (dem, ':'); // OBSOLETE if (dem_p != 0 && *(dem_p - 1) == ':') // OBSOLETE dem_p++; // OBSOLETE FIELD_NAME (fip->list->field) = // OBSOLETE obsavestring (dem_p, strlen (dem_p), &objfile->type_obstack); // OBSOLETE } // OBSOLETE else // OBSOLETE { // OBSOLETE FIELD_NAME (fip->list->field) = // OBSOLETE obsavestring (*pp, p - *pp, &objfile->type_obstack); // OBSOLETE } // OBSOLETE *p = save_p; // OBSOLETE } // OBSOLETE /* end of code for cfront work around */ // OBSOLETE else #endif /* OBSOLETE CFront */ fip->list->field.name = obsavestring (*pp, p - *pp, &objfile->type_obstack); *pp = p + 1; /* This means we have a visibility for a field coming. */ if (**pp == '/') { (*pp)++; fip->list->visibility = *(*pp)++; } else { /* normal dbx-style format, no explicit visibility */ fip->list->visibility = VISIBILITY_PUBLIC; } fip->list->field.type = read_type (pp, objfile); /* See if embedded type info that is terminated with a ";". Skip the ";" in this case... */ if (**pp == ';') ++(*pp); if (**pp == ':') { p = ++(*pp); #if 0 /* Possible future hook for nested types. */ if (**pp == '!') { fip->list->field.bitpos = (long) -2; /* nested type */ p = ++(*pp); } else ...; #endif while (*p != ';') { p++; } /* Static class member. */ SET_FIELD_PHYSNAME (fip->list->field, obsavestring (*pp, p - *pp, &objfile->type_obstack)); *pp = p + 1; return; } else if (**pp != ',') { /* Bad structure-type format. */ stabs_general_complaint ("bad structure-type format"); return; } (*pp)++; /* Skip the comma. */ { int nbits; FIELD_BITPOS (fip->list->field) = read_huge_number (pp, ',', &nbits); if (nbits != 0) { stabs_general_complaint ("bad structure-type format"); return; } FIELD_BITSIZE (fip->list->field) = read_huge_number (pp, ';', &nbits); if (nbits != 0) { stabs_general_complaint ("bad structure-type format"); return; } } if (FIELD_BITPOS (fip->list->field) == 0 && FIELD_BITSIZE (fip->list->field) == 0) { /* This can happen in two cases: (1) at least for gcc 2.4.5 or so, it is a field which has been optimized out. The correct stab for this case is to use VISIBILITY_IGNORE, but that is a recent invention. (2) It is a 0-size array. For example union { int num; char str[0]; } foo. Printing "<no value>" for str in "p foo" is OK, since foo.str (and thus foo.str[3]) will continue to work, and a 0-size array as a whole doesn't have any contents to print. I suspect this probably could also happen with gcc -gstabs (not -gstabs+) for static fields, and perhaps other C++ extensions. Hopefully few people use -gstabs with gdb, since it is intended for dbx compatibility. */ /* Ignore this field. */ fip->list->visibility = VISIBILITY_IGNORE; } else { /* Detect an unpacked field and mark it as such. dbx gives a bit size for all fields. Note that forward refs cannot be packed, and treat enums as if they had the width of ints. */ struct type *field_type = check_typedef (FIELD_TYPE (fip->list->field)); if (TYPE_CODE (field_type) != TYPE_CODE_INT && TYPE_CODE (field_type) != TYPE_CODE_RANGE && TYPE_CODE (field_type) != TYPE_CODE_BOOL && TYPE_CODE (field_type) != TYPE_CODE_ENUM) { FIELD_BITSIZE (fip->list->field) = 0; } if ((FIELD_BITSIZE (fip->list->field) == TARGET_CHAR_BIT * TYPE_LENGTH (field_type) || (TYPE_CODE (field_type) == TYPE_CODE_ENUM && FIELD_BITSIZE (fip->list->field) == TARGET_INT_BIT) ) && FIELD_BITPOS (fip->list->field) % 8 == 0) { FIELD_BITSIZE (fip->list->field) = 0; } } } /* Read struct or class data fields. They have the form: NAME : [VISIBILITY] TYPENUM , BITPOS , BITSIZE ; At the end, we see a semicolon instead of a field. In C++, this may wind up being NAME:?TYPENUM:PHYSNAME; for a static field. The optional VISIBILITY is one of: '/0' (VISIBILITY_PRIVATE) '/1' (VISIBILITY_PROTECTED) '/2' (VISIBILITY_PUBLIC) '/9' (VISIBILITY_IGNORE) or nothing, for C style fields with public visibility. Returns 1 for success, 0 for failure. */ static int read_struct_fields (struct field_info *fip, char **pp, struct type *type, struct objfile *objfile) { register char *p; struct nextfield *new; /* We better set p right now, in case there are no fields at all... */ p = *pp; /* Read each data member type until we find the terminating ';' at the end of the data member list, or break for some other reason such as finding the start of the member function list. */ /* Stab string for structure/union does not end with two ';' in SUN C compiler 5.3 i.e. F6U2, hence check for end of string. */ while (**pp != ';' && **pp != '\0') { STABS_CONTINUE (pp, objfile); /* Get space to record the next field's data. */ new = (struct nextfield *) xmalloc (sizeof (struct nextfield)); make_cleanup (xfree, new); memset (new, 0, sizeof (struct nextfield)); new->next = fip->list; fip->list = new; /* Get the field name. */ p = *pp; /* If is starts with CPLUS_MARKER it is a special abbreviation, unless the CPLUS_MARKER is followed by an underscore, in which case it is just the name of an anonymous type, which we should handle like any other type name. */ if (is_cplus_marker (p[0]) && p[1] != '_') { if (!read_cpp_abbrev (fip, pp, type, objfile)) return 0; continue; } /* Look for the ':' that separates the field name from the field values. Data members are delimited by a single ':', while member functions are delimited by a pair of ':'s. When we hit the member functions (if any), terminate scan loop and return. */ while (*p != ':' && *p != '\0') { p++; } if (*p == '\0') return 0; /* Check to see if we have hit the member functions yet. */ if (p[1] == ':') { break; } read_one_struct_field (fip, pp, p, type, objfile); } if (p[0] == ':' && p[1] == ':') { /* (the deleted) chill the list of fields: the last entry (at the head) is a partially constructed entry which we now scrub. */ fip->list = fip->list->next; } return 1; } /* *INDENT-OFF* */ /* The stabs for C++ derived classes contain baseclass information which is marked by a '!' character after the total size. This function is called when we encounter the baseclass marker, and slurps up all the baseclass information. Immediately following the '!' marker is the number of base classes that the class is derived from, followed by information for each base class. For each base class, there are two visibility specifiers, a bit offset to the base class information within the derived class, a reference to the type for the base class, and a terminating semicolon. A typical example, with two base classes, would be "!2,020,19;0264,21;". ^^ ^ ^ ^ ^ ^ ^ Baseclass information marker __________________|| | | | | | | Number of baseclasses __________________________| | | | | | | Visibility specifiers (2) ________________________| | | | | | Offset in bits from start of class _________________| | | | | Type number for base class ___________________________| | | | Visibility specifiers (2) _______________________________| | | Offset in bits from start of class ________________________| | Type number of base class ____________________________________| Return 1 for success, 0 for (error-type-inducing) failure. */ /* *INDENT-ON* */ static int read_baseclasses (struct field_info *fip, char **pp, struct type *type, struct objfile *objfile) { int i; struct nextfield *new; if (**pp != '!') { return 1; } else { /* Skip the '!' baseclass information marker. */ (*pp)++; } ALLOCATE_CPLUS_STRUCT_TYPE (type); { int nbits; TYPE_N_BASECLASSES (type) = read_huge_number (pp, ',', &nbits); if (nbits != 0) return 0; } #if 0 /* Some stupid compilers have trouble with the following, so break it up into simpler expressions. */ TYPE_FIELD_VIRTUAL_BITS (type) = (B_TYPE *) TYPE_ALLOC (type, B_BYTES (TYPE_N_BASECLASSES (type))); #else { int num_bytes = B_BYTES (TYPE_N_BASECLASSES (type)); char *pointer; pointer = (char *) TYPE_ALLOC (type, num_bytes); TYPE_FIELD_VIRTUAL_BITS (type) = (B_TYPE *) pointer; } #endif /* 0 */ B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type), TYPE_N_BASECLASSES (type)); for (i = 0; i < TYPE_N_BASECLASSES (type); i++) { new = (struct nextfield *) xmalloc (sizeof (struct nextfield)); make_cleanup (xfree, new); memset (new, 0, sizeof (struct nextfield)); new->next = fip->list; fip->list = new; FIELD_BITSIZE (new->field) = 0; /* this should be an unpacked field! */ STABS_CONTINUE (pp, objfile); switch (**pp) { case '0': /* Nothing to do. */ break; case '1': SET_TYPE_FIELD_VIRTUAL (type, i); break; default: /* Unknown character. Complain and treat it as non-virtual. */ { complaint (&symfile_complaints, "Unknown virtual character `%c' for baseclass", **pp); } } ++(*pp); new->visibility = *(*pp)++; switch (new->visibility) { case VISIBILITY_PRIVATE: case VISIBILITY_PROTECTED: case VISIBILITY_PUBLIC: break; default: /* Bad visibility format. Complain and treat it as public. */ { complaint (&symfile_complaints, "Unknown visibility `%c' for baseclass", new->visibility); new->visibility = VISIBILITY_PUBLIC; } } { int nbits; /* The remaining value is the bit offset of the portion of the object corresponding to this baseclass. Always zero in the absence of multiple inheritance. */ FIELD_BITPOS (new->field) = read_huge_number (pp, ',', &nbits); if (nbits != 0) return 0; } /* The last piece of baseclass information is the type of the base class. Read it, and remember it's type name as this field's name. */ new->field.type = read_type (pp, objfile); new->field.name = type_name_no_tag (new->field.type); /* skip trailing ';' and bump count of number of fields seen */ if (**pp == ';') (*pp)++; else return 0; } return 1; } /* The tail end of stabs for C++ classes that contain a virtual function pointer contains a tilde, a %, and a type number. The type number refers to the base class (possibly this class itself) which contains the vtable pointer for the current class. This function is called when we have parsed all the method declarations, so we can look for the vptr base class info. */ static int read_tilde_fields (struct field_info *fip, char **pp, struct type *type, struct objfile *objfile) { register char *p; STABS_CONTINUE (pp, objfile); /* If we are positioned at a ';', then skip it. */ if (**pp == ';') { (*pp)++; } if (**pp == '~') { (*pp)++; if (**pp == '=' || **pp == '+' || **pp == '-') { /* Obsolete flags that used to indicate the presence of constructors and/or destructors. */ (*pp)++; } /* Read either a '%' or the final ';'. */ if (*(*pp)++ == '%') { /* The next number is the type number of the base class (possibly our own class) which supplies the vtable for this class. Parse it out, and search that class to find its vtable pointer, and install those into TYPE_VPTR_BASETYPE and TYPE_VPTR_FIELDNO. */ struct type *t; int i; t = read_type (pp, objfile); p = (*pp)++; while (*p != '\0' && *p != ';') { p++; } if (*p == '\0') { /* Premature end of symbol. */ return 0; } TYPE_VPTR_BASETYPE (type) = t; if (type == t) /* Our own class provides vtbl ptr */ { for (i = TYPE_NFIELDS (t) - 1; i >= TYPE_N_BASECLASSES (t); --i) { char *name = TYPE_FIELD_NAME (t, i); if (!strncmp (name, vptr_name, sizeof (vptr_name) - 2) && is_cplus_marker (name[sizeof (vptr_name) - 2])) { TYPE_VPTR_FIELDNO (type) = i; goto gotit; } } /* Virtual function table field not found. */ complaint (&symfile_complaints, "virtual function table pointer not found when defining class `%s'", TYPE_NAME (type)); return 0; } else { TYPE_VPTR_FIELDNO (type) = TYPE_VPTR_FIELDNO (t); } gotit: *pp = p + 1; } } return 1; } static int attach_fn_fields_to_type (struct field_info *fip, register struct type *type) { register int n; for (n = TYPE_NFN_FIELDS (type); fip->fnlist != NULL; fip->fnlist = fip->fnlist->next) { --n; /* Circumvent Sun3 compiler bug */ TYPE_FN_FIELDLISTS (type)[n] = fip->fnlist->fn_fieldlist; } return 1; } #if 0 /* OBSOLETE CFront */ // OBSOLETE /* read cfront class static data. // OBSOLETE pp points to string starting with the list of static data // OBSOLETE eg: A:ZcA;1@Bpub v2@Bvirpri;__ct__1AFv func__1AFv *sfunc__1AFv ;as__1A ;; // OBSOLETE ^^^^^^^^ // OBSOLETE A:ZcA;;foopri__1AFv foopro__1AFv __ct__1AFv __ct__1AFRC1A foopub__1AFv ;;; // OBSOLETE ^ // OBSOLETE */ // OBSOLETE static int // OBSOLETE read_cfront_static_fields (struct field_info *fip, char **pp, struct type *type, // OBSOLETE struct objfile *objfile) // OBSOLETE { // OBSOLETE struct nextfield *new; // OBSOLETE struct type *stype; // OBSOLETE char *sname; // OBSOLETE struct symbol *ref_static = 0; // OBSOLETE if (**pp == ';') /* no static data; return */ // OBSOLETE { // OBSOLETE ++(*pp); // OBSOLETE return 1; // OBSOLETE } // OBSOLETE /* Process each field in the list until we find the terminating ";" */ // OBSOLETE /* eg: p = "as__1A ;;;" */ // OBSOLETE STABS_CONTINUE (pp, objfile); /* handle \\ */ // OBSOLETE while (**pp != ';' && (sname = get_substring (pp, ' '), sname)) // OBSOLETE { // OBSOLETE ref_static = lookup_symbol (sname, 0, VAR_NAMESPACE, 0, 0); /*demangled_name */ // OBSOLETE if (!ref_static) // OBSOLETE { // OBSOLETE complaint (&symfile_complaints, // OBSOLETE "Unable to find symbol for static data field %s", sname); // OBSOLETE continue; // OBSOLETE } // OBSOLETE stype = SYMBOL_TYPE (ref_static); // OBSOLETE /* allocate a new fip */ // OBSOLETE new = (struct nextfield *) xmalloc (sizeof (struct nextfield)); // OBSOLETE make_cleanup (xfree, new); // OBSOLETE memset (new, 0, sizeof (struct nextfield)); // OBSOLETE new->next = fip->list; // OBSOLETE fip->list = new; // OBSOLETE /* set visibility */ // OBSOLETE /* FIXME! no way to tell visibility from stabs??? */ // OBSOLETE new->visibility = VISIBILITY_PUBLIC; // OBSOLETE /* set field info into fip */ // OBSOLETE fip->list->field.type = stype; // OBSOLETE /* set bitpos & bitsize */ // OBSOLETE SET_FIELD_PHYSNAME (fip->list->field, savestring (sname, strlen (sname))); // OBSOLETE /* set name field */ // OBSOLETE /* The following is code to work around cfront generated stabs. // OBSOLETE The stabs contains full mangled name for each field. // OBSOLETE We try to demangle the name and extract the field name out of it. // OBSOLETE */ // OBSOLETE if (ARM_DEMANGLING) // OBSOLETE { // OBSOLETE char *dem, *dem_p; // OBSOLETE dem = cplus_demangle (sname, DMGL_ANSI | DMGL_PARAMS); // OBSOLETE if (dem != NULL) // OBSOLETE { // OBSOLETE dem_p = strrchr (dem, ':'); // OBSOLETE if (dem_p != 0 && *(dem_p - 1) == ':') // OBSOLETE dem_p++; // OBSOLETE fip->list->field.name = // OBSOLETE obsavestring (dem_p, strlen (dem_p), &objfile->type_obstack); // OBSOLETE } // OBSOLETE else // OBSOLETE { // OBSOLETE fip->list->field.name = // OBSOLETE obsavestring (sname, strlen (sname), &objfile->type_obstack); // OBSOLETE } // OBSOLETE } /* end of code for cfront work around */ // OBSOLETE } /* loop again for next static field */ // OBSOLETE return 1; // OBSOLETE } // OBSOLETE /* Copy structure fields to fip so attach_fields_to_type will work. // OBSOLETE type has already been created with the initial instance data fields. // OBSOLETE Now we want to be able to add the other members to the class, // OBSOLETE so we want to add them back to the fip and reattach them again // OBSOLETE once we have collected all the class members. */ // OBSOLETE static int // OBSOLETE copy_cfront_struct_fields (struct field_info *fip, struct type *type, // OBSOLETE struct objfile *objfile) // OBSOLETE { // OBSOLETE int nfields = TYPE_NFIELDS (type); // OBSOLETE int i; // OBSOLETE struct nextfield *new; // OBSOLETE /* Copy the fields into the list of fips and reset the types // OBSOLETE to remove the old fields */ // OBSOLETE for (i = 0; i < nfields; i++) // OBSOLETE { // OBSOLETE /* allocate a new fip */ // OBSOLETE new = (struct nextfield *) xmalloc (sizeof (struct nextfield)); // OBSOLETE make_cleanup (xfree, new); // OBSOLETE memset (new, 0, sizeof (struct nextfield)); // OBSOLETE new->next = fip->list; // OBSOLETE fip->list = new; // OBSOLETE /* copy field info into fip */ // OBSOLETE new->field = TYPE_FIELD (type, i); // OBSOLETE /* set visibility */ // OBSOLETE if (TYPE_FIELD_PROTECTED (type, i)) // OBSOLETE new->visibility = VISIBILITY_PROTECTED; // OBSOLETE else if (TYPE_FIELD_PRIVATE (type, i)) // OBSOLETE new->visibility = VISIBILITY_PRIVATE; // OBSOLETE else // OBSOLETE new->visibility = VISIBILITY_PUBLIC; // OBSOLETE } // OBSOLETE /* Now delete the fields from the type since we will be // OBSOLETE allocing new space once we get the rest of the fields // OBSOLETE in attach_fields_to_type. // OBSOLETE The pointer TYPE_FIELDS(type) is left dangling but should // OBSOLETE be freed later by objstack_free */ // OBSOLETE TYPE_FIELDS (type) = 0; // OBSOLETE TYPE_NFIELDS (type) = 0; // OBSOLETE return 1; // OBSOLETE } #endif /* OBSOLETE CFront */ /* Copy structure fields to fip so attach_fields_to_type will work. type has already been created with the initial instance data fields. Now we want to be able to add the other members to the class, so we want to add them back to the fip and reattach them again once we have collected all the class members. */ static int copy_cfront_struct_fields (struct field_info *fip, struct type *type, struct objfile *objfile) { int nfields = TYPE_NFIELDS (type); int i; struct nextfield *new; /* Copy the fields into the list of fips and reset the types to remove the old fields */ for (i = 0; i < nfields; i++) { /* allocate a new fip */ new = (struct nextfield *) xmalloc (sizeof (struct nextfield)); make_cleanup (xfree, new); memset (new, 0, sizeof (struct nextfield)); new->next = fip->list; fip->list = new; /* copy field info into fip */ new->field = TYPE_FIELD (type, i); /* set visibility */ if (TYPE_FIELD_PROTECTED (type, i)) new->visibility = VISIBILITY_PROTECTED; else if (TYPE_FIELD_PRIVATE (type, i)) new->visibility = VISIBILITY_PRIVATE; else new->visibility = VISIBILITY_PUBLIC; } /* Now delete the fields from the type since we will be allocing new space once we get the rest of the fields in attach_fields_to_type. The pointer TYPE_FIELDS(type) is left dangling but should be freed later by objstack_free */ TYPE_FIELDS (type) = 0; TYPE_NFIELDS (type) = 0; return 1; } /* Create the vector of fields, and record how big it is. We need this info to record proper virtual function table information for this class's virtual functions. */ static int attach_fields_to_type (struct field_info *fip, register struct type *type, struct objfile *objfile) { register int nfields = 0; register int non_public_fields = 0; register struct nextfield *scan; /* Count up the number of fields that we have, as well as taking note of whether or not there are any non-public fields, which requires us to allocate and build the private_field_bits and protected_field_bits bitfields. */ for (scan = fip->list; scan != NULL; scan = scan->next) { nfields++; if (scan->visibility != VISIBILITY_PUBLIC) { non_public_fields++; } } /* Now we know how many fields there are, and whether or not there are any non-public fields. Record the field count, allocate space for the array of fields, and create blank visibility bitfields if necessary. */ TYPE_NFIELDS (type) = nfields; TYPE_FIELDS (type) = (struct field *) TYPE_ALLOC (type, sizeof (struct field) * nfields); memset (TYPE_FIELDS (type), 0, sizeof (struct field) * nfields); if (non_public_fields) { ALLOCATE_CPLUS_STRUCT_TYPE (type); TYPE_FIELD_PRIVATE_BITS (type) = (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields)); B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type), nfields); TYPE_FIELD_PROTECTED_BITS (type) = (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields)); B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type), nfields); TYPE_FIELD_IGNORE_BITS (type) = (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields)); B_CLRALL (TYPE_FIELD_IGNORE_BITS (type), nfields); } /* Copy the saved-up fields into the field vector. Start from the head of the list, adding to the tail of the field array, so that they end up in the same order in the array in which they were added to the list. */ while (nfields-- > 0) { TYPE_FIELD (type, nfields) = fip->list->field; switch (fip->list->visibility) { case VISIBILITY_PRIVATE: SET_TYPE_FIELD_PRIVATE (type, nfields); break; case VISIBILITY_PROTECTED: SET_TYPE_FIELD_PROTECTED (type, nfields); break; case VISIBILITY_IGNORE: SET_TYPE_FIELD_IGNORE (type, nfields); break; case VISIBILITY_PUBLIC: break; default: /* Unknown visibility. Complain and treat it as public. */ { complaint (&symfile_complaints, "Unknown visibility `%c' for field", fip->list->visibility); } break; } fip->list = fip->list->next; } return 1; } /* Complain that the compiler has emitted more than one definition for the structure type TYPE. */ static void complain_about_struct_wipeout (struct type *type) { char *name = ""; char *kind = ""; if (TYPE_TAG_NAME (type)) { name = TYPE_TAG_NAME (type); switch (TYPE_CODE (type)) { case TYPE_CODE_STRUCT: kind = "struct "; break; case TYPE_CODE_UNION: kind = "union "; break; case TYPE_CODE_ENUM: kind = "enum "; break; default: kind = ""; } } else if (TYPE_NAME (type)) { name = TYPE_NAME (type); kind = ""; } else { name = "<unknown>"; kind = ""; } complaint (&symfile_complaints, "struct/union type gets multiply defined: %s%s", kind, name); } /* Read the description of a structure (or union type) and return an object describing the type. PP points to a character pointer that points to the next unconsumed token in the the stabs string. For example, given stabs "A:T4=s4a:1,0,32;;", *PP will point to "4a:1,0,32;;". TYPE points to an incomplete type that needs to be filled in. OBJFILE points to the current objfile from which the stabs information is being read. (Note that it is redundant in that TYPE also contains a pointer to this same objfile, so it might be a good idea to eliminate it. FIXME). */ static struct type * read_struct_type (char **pp, struct type *type, enum type_code type_code, struct objfile *objfile) { struct cleanup *back_to; struct field_info fi; fi.list = NULL; fi.fnlist = NULL; /* When describing struct/union/class types in stabs, G++ always drops all qualifications from the name. So if you've got: struct A { ... struct B { ... }; ... }; then G++ will emit stabs for `struct A::B' that call it simply `struct B'. Obviously, if you've got a real top-level definition for `struct B', or other nested definitions, this is going to cause problems. Obviously, GDB can't fix this by itself, but it can at least avoid scribbling on existing structure type objects when new definitions appear. */ if (! (TYPE_CODE (type) == TYPE_CODE_UNDEF || TYPE_STUB (type))) { complain_about_struct_wipeout (type); /* It's probably best to return the type unchanged. */ return type; } back_to = make_cleanup (null_cleanup, 0); INIT_CPLUS_SPECIFIC (type); TYPE_CODE (type) = type_code; TYPE_FLAGS (type) &= ~TYPE_FLAG_STUB; /* First comes the total size in bytes. */ { int nbits; TYPE_LENGTH (type) = read_huge_number (pp, 0, &nbits); if (nbits != 0) return error_type (pp, objfile); } /* Now read the baseclasses, if any, read the regular C struct or C++ class member fields, attach the fields to the type, read the C++ member functions, attach them to the type, and then read any tilde field (baseclass specifier for the class holding the main vtable). */ if (!read_baseclasses (&fi, pp, type, objfile) || !read_struct_fields (&fi, pp, type, objfile) || !attach_fields_to_type (&fi, type, objfile) || !read_member_functions (&fi, pp, type, objfile) || !attach_fn_fields_to_type (&fi, type) || !read_tilde_fields (&fi, pp, type, objfile)) { type = error_type (pp, objfile); } do_cleanups (back_to); return (type); } /* Read a definition of an array type, and create and return a suitable type object. Also creates a range type which represents the bounds of that array. */ static struct type * read_array_type (register char **pp, register struct type *type, struct objfile *objfile) { struct type *index_type, *element_type, *range_type; int lower, upper; int adjustable = 0; int nbits; /* Format of an array type: "ar<index type>;lower;upper;<array_contents_type>". OS9000: "arlower,upper;<array_contents_type>". Fortran adjustable arrays use Adigits or Tdigits for lower or upper; for these, produce a type like float[][]. */ { index_type = read_type (pp, objfile); if (**pp != ';') /* Improper format of array type decl. */ return error_type (pp, objfile); ++*pp; } if (!(**pp >= '0' && **pp <= '9') && **pp != '-') { (*pp)++; adjustable = 1; } lower = read_huge_number (pp, ';', &nbits); if (nbits != 0) return error_type (pp, objfile); if (!(**pp >= '0' && **pp <= '9') && **pp != '-') { (*pp)++; adjustable = 1; } upper = read_huge_number (pp, ';', &nbits); if (nbits != 0) return error_type (pp, objfile); element_type = read_type (pp, objfile); if (adjustable) { lower = 0; upper = -1; } range_type = create_range_type ((struct type *) NULL, index_type, lower, upper); type = create_array_type (type, element_type, range_type); return type; } /* Read a definition of an enumeration type, and create and return a suitable type object. Also defines the symbols that represent the values of the type. */ static struct type * read_enum_type (register char **pp, register struct type *type, struct objfile *objfile) { register char *p; char *name; register long n; register struct symbol *sym; int nsyms = 0; struct pending **symlist; struct pending *osyms, *syms; int o_nsyms; int nbits; unsigned long data; int sign; int signed_required = 0; int unsigned_required = 0; #if 0 /* FIXME! The stabs produced by Sun CC merrily define things that ought to be file-scope, between N_FN entries, using N_LSYM. What's a mother to do? For now, force all enum values to file scope. */ if (within_function) symlist = &local_symbols; else #endif symlist = &file_symbols; osyms = *symlist; o_nsyms = osyms ? osyms->nsyms : 0; /* The aix4 compiler emits an extra field before the enum members; my guess is it's a type of some sort. Just ignore it. */ if (**pp == '-') { /* Skip over the type. */ while (**pp != ':') (*pp)++; /* Skip over the colon. */ (*pp)++; } /* Read the value-names and their values. The input syntax is NAME:VALUE,NAME:VALUE, and so on. A semicolon or comma instead of a NAME means the end. */ while (**pp && **pp != ';' && **pp != ',') { STABS_CONTINUE (pp, objfile); p = *pp; while (*p != ':') p++; name = obsavestring (*pp, p - *pp, &objfile->symbol_obstack); *pp = p + 1; read_huge_number_raw (pp, ',', &nbits, &sign, &data); if (nbits != 0) return error_type (pp, objfile); if (((sign > 0) && (data > UENUM_MAX)) || ((sign < 0) && (data > MINUS_ENUM_MIN))) return error_type (pp, objfile); if (sign < 0) signed_required = 1; if ((sign > 0) && (data > ENUM_MAX)) unsigned_required = 1; if (signed_required && unsigned_required) return error_type (pp, objfile); sym = (struct symbol *) obstack_alloc (&objfile->symbol_obstack, sizeof (struct symbol)); memset (sym, 0, sizeof (struct symbol)); SYMBOL_NAME (sym) = name; SYMBOL_LANGUAGE (sym) = current_subfile->language; SYMBOL_CLASS (sym) = LOC_CONST; SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE; if (sign > 0) { SYMBOL_VALUE (sym) = data; } else { SYMBOL_VALUE (sym) = -data; } add_symbol_to_list (sym, symlist); nsyms++; } if (**pp == ';') (*pp)++; /* Skip the semicolon. */ /* Now fill in the fields of the type-structure. */ TYPE_LENGTH (type) = TARGET_INT_BIT / HOST_CHAR_BIT; TYPE_CODE (type) = TYPE_CODE_ENUM; TYPE_FLAGS (type) &= ~TYPE_FLAG_STUB; if (!signed_required) TYPE_FLAGS (type) |= TYPE_FLAG_UNSIGNED; TYPE_NFIELDS (type) = nsyms; TYPE_FIELDS (type) = (struct field *) TYPE_ALLOC (type, sizeof (struct field) * nsyms); memset (TYPE_FIELDS (type), 0, sizeof (struct field) * nsyms); /* Find the symbols for the values and put them into the type. The symbols can be found in the symlist that we put them on to cause them to be defined. osyms contains the old value of that symlist; everything up to there was defined by us. */ /* Note that we preserve the order of the enum constants, so that in something like "enum {FOO, LAST_THING=FOO}" we print FOO, not LAST_THING. */ for (syms = *symlist, n = nsyms - 1; syms; syms = syms->next) { int last = syms == osyms ? o_nsyms : 0; int j = syms->nsyms; for (; --j >= last; --n) { struct symbol *xsym = syms->symbol[j]; SYMBOL_TYPE (xsym) = type; TYPE_FIELD_NAME (type, n) = SYMBOL_NAME (xsym); TYPE_FIELD_BITPOS (type, n) = SYMBOL_VALUE (xsym); TYPE_FIELD_BITSIZE (type, n) = 0; } if (syms == osyms) break; } return type; } /* Sun's ACC uses a somewhat saner method for specifying the builtin typedefs in every file (for int, long, etc): type = b <signed> <width> <format type>; <offset>; <nbits> signed = u or s. optional format type = c or b for char or boolean. offset = offset from high order bit to start bit of type. width is # bytes in object of this type, nbits is # bits in type. The width/offset stuff appears to be for small objects stored in larger ones (e.g. `shorts' in `int' registers). We ignore it for now, FIXME. */ static struct type * read_sun_builtin_type (char **pp, int typenums[2], struct objfile *objfile) { int type_bits; int nbits; int signed_type; enum type_code code = TYPE_CODE_INT; switch (**pp) { case 's': signed_type = 1; break; case 'u': signed_type = 0; break; default: return error_type (pp, objfile); } (*pp)++; /* For some odd reason, all forms of char put a c here. This is strange because no other type has this honor. We can safely ignore this because we actually determine 'char'acterness by the number of bits specified in the descriptor. Boolean forms, e.g Fortran logical*X, put a b here. */ if (**pp == 'c') (*pp)++; else if (**pp == 'b') { code = TYPE_CODE_BOOL; (*pp)++; } /* The first number appears to be the number of bytes occupied by this type, except that unsigned short is 4 instead of 2. Since this information is redundant with the third number, we will ignore it. */ read_huge_number (pp, ';', &nbits); if (nbits != 0) return error_type (pp, objfile); /* The second number is always 0, so ignore it too. */ read_huge_number (pp, ';', &nbits); if (nbits != 0) return error_type (pp, objfile); /* The third number is the number of bits for this type. */ type_bits = read_huge_number (pp, 0, &nbits); if (nbits != 0) return error_type (pp, objfile); /* The type *should* end with a semicolon. If it are embedded in a larger type the semicolon may be the only way to know where the type ends. If this type is at the end of the stabstring we can deal with the omitted semicolon (but we don't have to like it). Don't bother to complain(), Sun's compiler omits the semicolon for "void". */ if (**pp == ';') ++(*pp); if (type_bits == 0) return init_type (TYPE_CODE_VOID, 1, signed_type ? 0 : TYPE_FLAG_UNSIGNED, (char *) NULL, objfile); else return init_type (code, type_bits / TARGET_CHAR_BIT, signed_type ? 0 : TYPE_FLAG_UNSIGNED, (char *) NULL, objfile); } static struct type * read_sun_floating_type (char **pp, int typenums[2], struct objfile *objfile) { int nbits; int details; int nbytes; struct type *rettype; /* The first number has more details about the type, for example FN_COMPLEX. */ details = read_huge_number (pp, ';', &nbits); if (nbits != 0) return error_type (pp, objfile); /* The second number is the number of bytes occupied by this type */ nbytes = read_huge_number (pp, ';', &nbits); if (nbits != 0) return error_type (pp, objfile); if (details == NF_COMPLEX || details == NF_COMPLEX16 || details == NF_COMPLEX32) { rettype = init_type (TYPE_CODE_COMPLEX, nbytes, 0, NULL, objfile); TYPE_TARGET_TYPE (rettype) = init_type (TYPE_CODE_FLT, nbytes / 2, 0, NULL, objfile); return rettype; } return init_type (TYPE_CODE_FLT, nbytes, 0, NULL, objfile); } /* Read a number from the string pointed to by *PP. The value of *PP is advanced over the number. If END is nonzero, the character that ends the number must match END, or an error happens; and that character is skipped if it does match. If END is zero, *PP is left pointing to that character. If the number fits in a long, set *BITS to 0 and return the value. If not, set *BITS to be the number of bits in the number and return 0. If encounter garbage, set *BITS to -1 and return 0. */ static void read_huge_number_raw (char **pp, int end, int *bits, int *sign, unsigned long *data) { char *p = *pp; long n = 0; int radix = 10; char overflow = 0; int nbits = 0; int c; *data = 0; *sign = 1; if (*p == '-') { *sign = -1; p++; } /* Leading zero means octal. GCC uses this to output values larger than an int (because that would be hard in decimal). */ if (*p == '0') { radix = 8; p++; } while ((c = *p++) >= '0' && c < ('0' + radix)) { if (n > (ULONG_MAX / radix)) overflow = 1; n *= radix; if (n > (ULONG_MAX - (c - '0'))) overflow = 1; n += c - '0'; /* This depends on large values being output in octal, which is what GCC does. */ if (radix == 8) { if (nbits == 0) { if (c == '0') /* Ignore leading zeroes. */ ; else if (c == '1') nbits = 1; else if (c == '2' || c == '3') nbits = 2; else nbits = 3; } else nbits += 3; } } if (end) { if (c && c != end) { if (bits != NULL) *bits = -1; return; } } else --p; *pp = p; if (overflow) { if (nbits == 0) { /* Large decimal constants are an error (because it is hard to count how many bits are in them). */ if (bits != NULL) *bits = -1; return; } if (bits) *bits = nbits; } else { if (bits) *bits = 0; *data = n; } /* It's *BITS which has the interesting information. */ return; } static long read_huge_number (char **pp, int end, int *bits) { int sign; unsigned long data; read_huge_number_raw (pp, end, bits, &sign, &data); if (*bits > 0) { /* -0x7f is the same as 0x80. So deal with it by adding one to the number of bits. */ if (sign < 0) *bits += 1; } if (*bits < 0) { return 0; } if (os9k_stabs) { return sign * data; } if ((sign > 0) && (data > (unsigned long) LONG_MAX)) { *bits = 32; return 0; } if ((sign < 0) && (data > (unsigned long) MINUS_LONG_MIN)) { *bits = 32; return 0; } return sign * data; } static struct type * read_range_type (char **pp, int typenums[2], struct objfile *objfile) { char *orig_pp = *pp; int rangenums[2]; long n2, n3; int n2bits, n3bits; int self_subrange; struct type *result_type; struct type *index_type = NULL; /* First comes a type we are a subrange of. In C it is usually 0, 1 or the type being defined. */ if (read_type_number (pp, rangenums) != 0) return error_type (pp, objfile); self_subrange = (rangenums[0] == typenums[0] && rangenums[1] == typenums[1]); if (**pp == '=') { *pp = orig_pp; index_type = read_type (pp, objfile); } /* A semicolon should now follow; skip it. */ if (**pp == ';') (*pp)++; /* The remaining two operands are usually lower and upper bounds of the range. But in some special cases they mean something else. */ n2 = read_huge_number (pp, ';', &n2bits); n3 = read_huge_number (pp, ';', &n3bits); if (n2bits == -1 || n3bits == -1) return error_type (pp, objfile); if (index_type) goto handle_true_range; /* If limits are huge, must be large integral type. */ if (n2bits != 0 || n3bits != 0) { char got_signed = 0; char got_unsigned = 0; /* Number of bits in the type. */ int nbits = 0; /* Range from 0 to <large number> is an unsigned large integral type. */ if ((n2bits == 0 && n2 == 0) && n3bits != 0) { got_unsigned = 1; nbits = n3bits; } /* Range from <large number> to <large number>-1 is a large signed integral type. Take care of the case where <large number> doesn't fit in a long but <large number>-1 does. */ else if ((n2bits != 0 && n3bits != 0 && n2bits == n3bits + 1) || (n2bits != 0 && n3bits == 0 && (n2bits == sizeof (long) * HOST_CHAR_BIT) && n3 == LONG_MAX)) { got_signed = 1; nbits = n2bits; } if (got_signed || got_unsigned) { return init_type (TYPE_CODE_INT, nbits / TARGET_CHAR_BIT, got_unsigned ? TYPE_FLAG_UNSIGNED : 0, NULL, objfile); } else return error_type (pp, objfile); } /* A type defined as a subrange of itself, with bounds both 0, is void. */ if (self_subrange && n2 == 0 && n3 == 0) return init_type (TYPE_CODE_VOID, 1, 0, NULL, objfile); /* If n3 is zero and n2 is positive, we want a floating type, and n2 is the width in bytes. Fortran programs appear to use this for complex types also. To distinguish between floats and complex, g77 (and others?) seem to use self-subranges for the complexes, and subranges of int for the floats. Also note that for complexes, g77 sets n2 to the size of one of the member floats, not the whole complex beast. My guess is that this was to work well with pre-COMPLEX versions of gdb. */ if (n3 == 0 && n2 > 0) { struct type *float_type = init_type (TYPE_CODE_FLT, n2, 0, NULL, objfile); if (self_subrange) { struct type *complex_type = init_type (TYPE_CODE_COMPLEX, 2 * n2, 0, NULL, objfile); TYPE_TARGET_TYPE (complex_type) = float_type; return complex_type; } else return float_type; } /* If the upper bound is -1, it must really be an unsigned int. */ else if (n2 == 0 && n3 == -1) { /* It is unsigned int or unsigned long. */ /* GCC 2.3.3 uses this for long long too, but that is just a GDB 3.5 compatibility hack. */ return init_type (TYPE_CODE_INT, TARGET_INT_BIT / TARGET_CHAR_BIT, TYPE_FLAG_UNSIGNED, NULL, objfile); } /* Special case: char is defined (Who knows why) as a subrange of itself with range 0-127. */ else if (self_subrange && n2 == 0 && n3 == 127) return init_type (TYPE_CODE_INT, 1, TYPE_FLAG_NOSIGN, NULL, objfile); /* We used to do this only for subrange of self or subrange of int. */ else if (n2 == 0) { /* -1 is used for the upper bound of (4 byte) "unsigned int" and "unsigned long", and we already checked for that, so don't need to test for it here. */ if (n3 < 0) /* n3 actually gives the size. */ return init_type (TYPE_CODE_INT, -n3, TYPE_FLAG_UNSIGNED, NULL, objfile); /* Is n3 == 2**(8n)-1 for some integer n? Then it's an unsigned n-byte integer. But do require n to be a power of two; we don't want 3- and 5-byte integers flying around. */ { int bytes; unsigned long bits; bits = n3; for (bytes = 0; (bits & 0xff) == 0xff; bytes++) bits >>= 8; if (bits == 0 && ((bytes - 1) & bytes) == 0) /* "bytes is a power of two" */ return init_type (TYPE_CODE_INT, bytes, TYPE_FLAG_UNSIGNED, NULL, objfile); } } /* I think this is for Convex "long long". Since I don't know whether Convex sets self_subrange, I also accept that particular size regardless of self_subrange. */ else if (n3 == 0 && n2 < 0 && (self_subrange || n2 == -TARGET_LONG_LONG_BIT / TARGET_CHAR_BIT)) return init_type (TYPE_CODE_INT, -n2, 0, NULL, objfile); else if (n2 == -n3 - 1) { if (n3 == 0x7f) return init_type (TYPE_CODE_INT, 1, 0, NULL, objfile); if (n3 == 0x7fff) return init_type (TYPE_CODE_INT, 2, 0, NULL, objfile); if (n3 == 0x7fffffff) return init_type (TYPE_CODE_INT, 4, 0, NULL, objfile); } /* We have a real range type on our hands. Allocate space and return a real pointer. */ handle_true_range: if (self_subrange) index_type = builtin_type_int; else index_type = *dbx_lookup_type (rangenums, objfile); if (index_type == NULL) { /* Does this actually ever happen? Is that why we are worrying about dealing with it rather than just calling error_type? */ static struct type *range_type_index; complaint (&symfile_complaints, "base type %d of range type is not defined", rangenums[1]); if (range_type_index == NULL) range_type_index = init_type (TYPE_CODE_INT, TARGET_INT_BIT / TARGET_CHAR_BIT, 0, "range type index type", NULL); index_type = range_type_index; } result_type = create_range_type ((struct type *) NULL, index_type, n2, n3); return (result_type); } /* Read in an argument list. This is a list of types, separated by commas and terminated with END. Return the list of types read in, or (struct field *) -1 if there is an error. */ static struct field * read_args (char **pp, int end, struct objfile *objfile, int *nargsp, int *varargsp) { unsigned int tsize = 64; struct type *tbuf[64]; struct type **talloc = NULL; struct type **tcur = tbuf; struct field *rval = NULL; unsigned int n = 0; unsigned int i; for (;;) { struct type *type; /* Check if we are at the end (typically the ':' character). */ if (**pp == end) { /* Move past the end character. */ (*pp)++; break; } /* Skip the separator; stop if none present. */ if (**pp != ',') { xfree (talloc); return (struct field *) -1; } (*pp)++; /* Read the next type. */ STABS_CONTINUE (pp, objfile); type = read_type (pp, objfile); if (type == NULL) { xfree (talloc); return (struct field *) -1; } /* Resize array if necessary. */ if (n >= tsize) { tsize *= 2; talloc = (struct type **) xrealloc (talloc, tsize * sizeof (struct type *)); tcur = talloc; } /* Add to the array to be returned. */ tcur[n++] = type; } if ((n > 0) && (TYPE_CODE (tcur[n - 1]) != TYPE_CODE_VOID)) { *varargsp = 1; } else { n--; *varargsp = 0; } *nargsp = n; rval = (struct field *) obstack_alloc (&objfile->type_obstack, n * sizeof (struct field)); memset (rval, 0, n * sizeof (struct field)); for (i = 0; i < n; i++) rval[i].type = tcur[i]; xfree (talloc); return rval; } /* Common block handling. */ /* List of symbols declared since the last BCOMM. This list is a tail of local_symbols. When ECOMM is seen, the symbols on the list are noted so their proper addresses can be filled in later, using the common block base address gotten from the assembler stabs. */ static struct pending *common_block; static int common_block_i; /* Name of the current common block. We get it from the BCOMM instead of the ECOMM to match IBM documentation (even though IBM puts the name both places like everyone else). */ static char *common_block_name; /* Process a N_BCOMM symbol. The storage for NAME is not guaranteed to remain after this function returns. */ void common_block_start (char *name, struct objfile *objfile) { if (common_block_name != NULL) { complaint (&symfile_complaints, "Invalid symbol data: common block within common block"); } common_block = local_symbols; common_block_i = local_symbols ? local_symbols->nsyms : 0; common_block_name = obsavestring (name, strlen (name), &objfile->symbol_obstack); } /* Process a N_ECOMM symbol. */ void common_block_end (struct objfile *objfile) { /* Symbols declared since the BCOMM are to have the common block start address added in when we know it. common_block and common_block_i point to the first symbol after the BCOMM in the local_symbols list; copy the list and hang it off the symbol for the common block name for later fixup. */ int i; struct symbol *sym; struct pending *new = 0; struct pending *next; int j; if (common_block_name == NULL) { complaint (&symfile_complaints, "ECOMM symbol unmatched by BCOMM"); return; } sym = (struct symbol *) obstack_alloc (&objfile->symbol_obstack, sizeof (struct symbol)); memset (sym, 0, sizeof (struct symbol)); /* Note: common_block_name already saved on symbol_obstack */ SYMBOL_NAME (sym) = common_block_name; SYMBOL_CLASS (sym) = LOC_BLOCK; /* Now we copy all the symbols which have been defined since the BCOMM. */ /* Copy all the struct pendings before common_block. */ for (next = local_symbols; next != NULL && next != common_block; next = next->next) { for (j = 0; j < next->nsyms; j++) add_symbol_to_list (next->symbol[j], &new); } /* Copy however much of COMMON_BLOCK we need. If COMMON_BLOCK is NULL, it means copy all the local symbols (which we already did above). */ if (common_block != NULL) for (j = common_block_i; j < common_block->nsyms; j++) add_symbol_to_list (common_block->symbol[j], &new); SYMBOL_TYPE (sym) = (struct type *) new; /* Should we be putting local_symbols back to what it was? Does it matter? */ i = hashname (SYMBOL_NAME (sym)); SYMBOL_VALUE_CHAIN (sym) = global_sym_chain[i]; global_sym_chain[i] = sym; common_block_name = NULL; } /* Add a common block's start address to the offset of each symbol declared to be in it (by being between a BCOMM/ECOMM pair that uses the common block name). */ static void fix_common_block (struct symbol *sym, int valu) { struct pending *next = (struct pending *) SYMBOL_TYPE (sym); for (; next; next = next->next) { register int j; for (j = next->nsyms - 1; j >= 0; j--) SYMBOL_VALUE_ADDRESS (next->symbol[j]) += valu; } } /* What about types defined as forward references inside of a small lexical scope? */ /* Add a type to the list of undefined types to be checked through once this file has been read in. */ void add_undefined_type (struct type *type) { if (undef_types_length == undef_types_allocated) { undef_types_allocated *= 2; undef_types = (struct type **) xrealloc ((char *) undef_types, undef_types_allocated * sizeof (struct type *)); } undef_types[undef_types_length++] = type; } /* Go through each undefined type, see if it's still undefined, and fix it up if possible. We have two kinds of undefined types: TYPE_CODE_ARRAY: Array whose target type wasn't defined yet. Fix: update array length using the element bounds and the target type's length. TYPE_CODE_STRUCT, TYPE_CODE_UNION: Structure whose fields were not yet defined at the time a pointer to it was made. Fix: Do a full lookup on the struct/union tag. */ void cleanup_undefined_types (void) { struct type **type; for (type = undef_types; type < undef_types + undef_types_length; type++) { switch (TYPE_CODE (*type)) { case TYPE_CODE_STRUCT: case TYPE_CODE_UNION: case TYPE_CODE_ENUM: { /* Check if it has been defined since. Need to do this here as well as in check_typedef to deal with the (legitimate in C though not C++) case of several types with the same name in different source files. */ if (TYPE_STUB (*type)) { struct pending *ppt; int i; /* Name of the type, without "struct" or "union" */ char *typename = TYPE_TAG_NAME (*type); if (typename == NULL) { complaint (&symfile_complaints, "need a type name"); break; } for (ppt = file_symbols; ppt; ppt = ppt->next) { for (i = 0; i < ppt->nsyms; i++) { struct symbol *sym = ppt->symbol[i]; if (SYMBOL_CLASS (sym) == LOC_TYPEDEF && SYMBOL_NAMESPACE (sym) == STRUCT_NAMESPACE && (TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE (*type)) && STREQ (SYMBOL_NAME (sym), typename)) replace_type (*type, SYMBOL_TYPE (sym)); } } } } break; default: { complaint (&symfile_complaints, "GDB internal error. cleanup_undefined_types with bad type %d.", TYPE_CODE (*type)); } break; } } undef_types_length = 0; } /* Scan through all of the global symbols defined in the object file, assigning values to the debugging symbols that need to be assigned to. Get these symbols from the minimal symbol table. */ void scan_file_globals (struct objfile *objfile) { int hash; struct minimal_symbol *msymbol; struct symbol *sym, *prev, *rsym; struct objfile *resolve_objfile; /* SVR4 based linkers copy referenced global symbols from shared libraries to the main executable. If we are scanning the symbols for a shared library, try to resolve them from the minimal symbols of the main executable first. */ /* APPLE LOCAL fix-and-continue: We must try to find global syms in the shared library first. In an F&C situation, we may have a second definition in the just-loaded fixed objfile and we need to correctly point to it. This SVR4 assumption is probably wrong for two level namespace programs, as well. */ resolve_objfile = objfile; while (1) { /* Avoid expensive loop through all minimal symbols if there are no unresolved symbols. */ for (hash = 0; hash < HASHSIZE; hash++) { if (global_sym_chain[hash]) break; } if (hash >= HASHSIZE) return; for (msymbol = resolve_objfile->msymbols; msymbol && SYMBOL_NAME (msymbol) != NULL; msymbol++) { QUIT; /* Skip static symbols. */ switch (MSYMBOL_TYPE (msymbol)) { case mst_file_text: case mst_file_data: case mst_file_bss: continue; default: break; } prev = NULL; /* Get the hash index and check all the symbols under that hash index. */ hash = hashname (SYMBOL_NAME (msymbol)); for (sym = global_sym_chain[hash]; sym;) { if (SYMBOL_NAME (msymbol)[0] == SYMBOL_NAME (sym)[0] && STREQ (SYMBOL_NAME (msymbol) + 1, SYMBOL_NAME (sym) + 1)) { struct alias_list *aliases; /* Splice this symbol out of the hash chain and assign the value we have to it. */ if (prev) { SYMBOL_VALUE_CHAIN (prev) = SYMBOL_VALUE_CHAIN (sym); } else { global_sym_chain[hash] = SYMBOL_VALUE_CHAIN (sym); } /* Check to see whether we need to fix up a common block. */ /* Note: this code might be executed several times for the same symbol if there are multiple references. */ /* If symbol has aliases, do minimal symbol fixups for each. These live aliases/references weren't added to global_sym_chain hash but may also need to be fixed up. */ /* FIXME: Maybe should have added aliases to the global chain, resolved symbol name, then treated aliases as normal symbols? Still, we wouldn't want to add_to_list. */ /* Now do the same for each alias of this symbol */ rsym = sym; aliases = SYMBOL_ALIASES (sym); while (rsym) { if (SYMBOL_CLASS (rsym) == LOC_BLOCK) { fix_common_block (rsym, SYMBOL_VALUE_ADDRESS (msymbol)); } else { SYMBOL_VALUE_ADDRESS (rsym) = SYMBOL_VALUE_ADDRESS (msymbol); } SYMBOL_SECTION (rsym) = SYMBOL_SECTION (msymbol); if (aliases) { rsym = aliases->sym; aliases = aliases->next; } else rsym = NULL; } if (prev) { sym = SYMBOL_VALUE_CHAIN (prev); } else { sym = global_sym_chain[hash]; } } else { prev = sym; sym = SYMBOL_VALUE_CHAIN (sym); } } } /* APPLE LOCAL fix-and-continue: First search for the symbols in the objfile, and then failing that, search for them in the symfile_objfile (the main app). */ if (symfile_objfile && objfile != symfile_objfile && resolve_objfile == objfile) { resolve_objfile = symfile_objfile; } else break; } /* Change the storage class of any remaining unresolved globals to LOC_UNRESOLVED and remove them from the chain. */ for (hash = 0; hash < HASHSIZE; hash++) { sym = global_sym_chain[hash]; while (sym) { prev = sym; sym = SYMBOL_VALUE_CHAIN (sym); /* Change the symbol address from the misleading chain value to address zero. */ SYMBOL_VALUE_ADDRESS (prev) = 0; /* Complain about unresolved common block symbols. */ if (SYMBOL_CLASS (prev) == LOC_STATIC) SYMBOL_CLASS (prev) = LOC_UNRESOLVED; else complaint (&symfile_complaints, "%s: common block `%s' from global_sym_chain unresolved", objfile->name, SYMBOL_NAME (prev)); } } memset (global_sym_chain, 0, sizeof (global_sym_chain)); } /* Initialize anything that needs initializing when starting to read a fresh piece of a symbol file, e.g. reading in the stuff corresponding to a psymtab. */ void stabsread_init (void) { } /* Initialize anything that needs initializing when a completely new symbol file is specified (not just adding some symbols from another file, e.g. a shared library). */ void stabsread_new_init (void) { /* Empty the hash table of global syms looking for values. */ memset (global_sym_chain, 0, sizeof (global_sym_chain)); } /* Initialize anything that needs initializing at the same time as start_symtab() is called. */ void start_stabs (void) { global_stabs = NULL; /* AIX COFF */ /* Leave FILENUM of 0 free for builtin types and this file's types. */ n_this_object_header_files = 1; type_vector_length = 0; type_vector = (struct type **) 0; /* FIXME: If common_block_name is not already NULL, we should complain(). */ common_block_name = NULL; } /* Call after end_symtab() */ void end_stabs (void) { if (type_vector) { xfree (type_vector); } type_vector = 0; type_vector_length = 0; previous_stab_code = 0; } void finish_global_stabs (struct objfile *objfile) { if (global_stabs) { patch_block_stabs (global_symbols, global_stabs, objfile); xfree (global_stabs); global_stabs = NULL; } } /* Find the end of the name, delimited by a ':', but don't match ObjC symbols which look like -[Foo bar::]:bla. */ char * find_name_end (char *name) { char *s = name; if (s[0] == '-' || *s == '+') { /* Must be an ObjC method symbol. */ if (s[1] != '[') { error ("invalid symbol name \"%s\"", name); } s = strchr (s, ']'); if (s == NULL) { error ("invalid symbol name \"%s\"", name); } return strchr (s, ':'); } else { return strchr (s, ':'); } } /* Initializer for this module */ void _initialize_stabsread (void) { undef_types_allocated = 20; undef_types_length = 0; undef_types = (struct type **) xmalloc (undef_types_allocated * sizeof (struct type *)); }