/* Build symbol tables in GDB's internal format. Copyright (C) 1986-1991 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., 675 Mass Ave, Cambridge, MA 02139, USA. */ /* This module provides subroutines used for creating and adding to the symbol table. These routines are called from various symbol- file-reading routines. They originated in dbxread.c of gdb-4.2, and were split out to make xcoffread.c more maintainable by sharing code. */ #include "defs.h" #include "param.h" #include "obstack.h" #include "symtab.h" #include "breakpoint.h" #include "gdbcore.h" /* for bfd stuff for symfile.h */ #include "symfile.h" /* Needed for "struct complaint" */ #include "stab.gnu.h" /* We always use GNU stabs, not native */ #include #include #include /* Ask buildsym.h to define the vars it normally declares `extern'. */ #define EXTERN /**/ #include "buildsym.h" /* Our own declarations */ #undef EXTERN extern void qsort (); extern double atof (); /* Things we export from outside, and probably shouldn't. FIXME. */ extern void new_object_header_files (); extern void start_subfile (); extern char *next_symbol_text (); extern int hashname (); static struct symbol *define_symbol (); static void cleanup_undefined_types (); static void fix_common_block (); static const char vptr_name[] = { '_','v','p','t','r',CPLUS_MARKER,'\0' }; static const char vb_name[] = { '_','v','b',CPLUS_MARKER,'\0' }; /* 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. */ #ifndef BELIEVE_PCC_PROMOTION #define BELIEVE_PCC_PROMOTION 0 #endif /* Make a list of forward references which haven't been defined. */ static struct type **undef_types; static int undef_types_allocated, undef_types_length; /* Complaints about the symbols we have encountered. */ struct complaint innerblock_complaint = {"inner block not inside outer block in %s", 0, 0}; struct complaint blockvector_complaint = {"block at %x out of order", 0, 0}; #if 0 struct complaint dbx_class_complaint = {"encountered DBX-style class variable debugging information.\n\ You seem to have compiled your program with \ \"g++ -g0\" instead of \"g++ -g\".\n\ Therefore GDB will not know about your class variables", 0, 0}; #endif struct complaint const_vol_complaint = {"const/volatile indicator missing (ok if using g++ v1.x), got '%c'", 0, 0}; struct complaint error_type_complaint = {"debug info mismatch between compiler and debugger", 0, 0}; struct complaint invalid_member_complaint = {"invalid (minimal) member type data format at symtab pos %d.", 0, 0}; struct complaint range_type_base_complaint = {"base type %d of range type is not defined", 0, 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 (typenums) int typenums[2]; { register int filenum = typenums[0], index = typenums[1]; if (filenum < 0 || filenum >= n_this_object_header_files) error ("Invalid symbol data: type number (%d,%d) out of range at symtab pos %d.", filenum, index, symnum); if (filenum == 0) { /* Type is defined outside of header files. Find it in this object file's type vector. */ while (index >= type_vector_length) { type_vector_length *= 2; type_vector = (struct type **) xrealloc (type_vector, (type_vector_length * sizeof (struct type *))); bzero (&type_vector[type_vector_length / 2], type_vector_length * sizeof (struct type *) / 2); } return &type_vector[index]; } else { register int real_filenum = this_object_header_files[filenum]; register struct header_file *f; int f_orig_length; if (real_filenum >= n_header_files) abort (); f = &header_files[real_filenum]; f_orig_length = f->length; if (index >= f_orig_length) { while (index >= f->length) f->length *= 2; f->vector = (struct type **) xrealloc (f->vector, f->length * sizeof (struct type *)); bzero (&f->vector[f_orig_length], (f->length - f_orig_length) * sizeof (struct type *)); } return &f->vector[index]; } } /* Create a type object. Occaisionally used when you need a type which isn't going to be given a type number. */ struct type * dbx_create_type () { register struct type *type = (struct type *) obstack_alloc (symbol_obstack, sizeof (struct type)); bzero (type, sizeof (struct type)); TYPE_VPTR_FIELDNO (type) = -1; TYPE_VPTR_BASETYPE (type) = 0; return type; } /* 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. */ struct type * dbx_alloc_type (typenums) int typenums[2]; { register struct type **type_addr; register struct type *type; if (typenums[1] != -1) { type_addr = dbx_lookup_type (typenums); type = *type_addr; } else { type_addr = 0; type = 0; } /* 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 == 0) { type = dbx_create_type (); if (type_addr) *type_addr = type; } return type; } /* maintain the lists of symbols and blocks */ /* Add a symbol to one of the lists of symbols. */ void add_symbol_to_list (symbol, listhead) struct symbol *symbol; struct pending **listhead; { /* We keep PENDINGSIZE symbols in each link of the list. If we don't have a link with room in it, add a new link. */ if (*listhead == 0 || (*listhead)->nsyms == PENDINGSIZE) { register struct pending *link; if (free_pendings) { link = free_pendings; free_pendings = link->next; } else link = (struct pending *) xmalloc (sizeof (struct pending)); link->next = *listhead; *listhead = link; link->nsyms = 0; } (*listhead)->symbol[(*listhead)->nsyms++] = symbol; } /* At end of reading syms, or in case of quit, really free as many `struct pending's as we can easily find. */ /* ARGSUSED */ void really_free_pendings (foo) int foo; { struct pending *next, *next1; #if 0 struct pending_block *bnext, *bnext1; #endif for (next = free_pendings; next; next = next1) { next1 = next->next; free (next); } free_pendings = 0; #if 0 /* Now we make the links in the symbol_obstack, so don't free them. */ for (bnext = pending_blocks; bnext; bnext = bnext1) { bnext1 = bnext->next; free (bnext); } #endif pending_blocks = 0; for (next = file_symbols; next; next = next1) { next1 = next->next; free (next); } file_symbols = 0; for (next = global_symbols; next; next = next1) { next1 = next->next; free (next); } global_symbols = 0; } /* Take one of the lists of symbols and make a block from it. Keep the order the symbols have in the list (reversed from the input file). Put the block on the list of pending blocks. */ void finish_block (symbol, listhead, old_blocks, start, end) struct symbol *symbol; struct pending **listhead; struct pending_block *old_blocks; CORE_ADDR start, end; { register struct pending *next, *next1; register struct block *block; register struct pending_block *pblock; struct pending_block *opblock; register int i; /* Count the length of the list of symbols. */ for (next = *listhead, i = 0; next; i += next->nsyms, next = next->next) /*EMPTY*/; block = (struct block *) obstack_alloc (symbol_obstack, (sizeof (struct block) + ((i - 1) * sizeof (struct symbol *)))); /* Copy the symbols into the block. */ BLOCK_NSYMS (block) = i; for (next = *listhead; next; next = next->next) { register int j; for (j = next->nsyms - 1; j >= 0; j--) BLOCK_SYM (block, --i) = next->symbol[j]; } BLOCK_START (block) = start; BLOCK_END (block) = end; BLOCK_SUPERBLOCK (block) = 0; /* Filled in when containing block is made */ BLOCK_GCC_COMPILED (block) = processing_gcc_compilation; /* Put the block in as the value of the symbol that names it. */ if (symbol) { SYMBOL_BLOCK_VALUE (symbol) = block; BLOCK_FUNCTION (block) = symbol; } else BLOCK_FUNCTION (block) = 0; /* Now "free" the links of the list, and empty the list. */ for (next = *listhead; next; next = next1) { next1 = next->next; next->next = free_pendings; free_pendings = next; } *listhead = 0; /* Install this block as the superblock of all blocks made since the start of this scope that don't have superblocks yet. */ opblock = 0; for (pblock = pending_blocks; pblock != old_blocks; pblock = pblock->next) { if (BLOCK_SUPERBLOCK (pblock->block) == 0) { #if 1 /* Check to be sure the blocks are nested as we receive them. If the compiler/assembler/linker work, this just burns a small amount of time. */ if (BLOCK_START (pblock->block) < BLOCK_START (block) || BLOCK_END (pblock->block) > BLOCK_END (block)) { complain(&innerblock_complaint, symbol? SYMBOL_NAME (symbol): "(don't know)"); BLOCK_START (pblock->block) = BLOCK_START (block); BLOCK_END (pblock->block) = BLOCK_END (block); } #endif BLOCK_SUPERBLOCK (pblock->block) = block; } opblock = pblock; } /* Record this block on the list of all blocks in the file. Put it after opblock, or at the beginning if opblock is 0. This puts the block in the list after all its subblocks. */ /* Allocate in the symbol_obstack to save time. It wastes a little space. */ pblock = (struct pending_block *) obstack_alloc (symbol_obstack, sizeof (struct pending_block)); pblock->block = block; if (opblock) { pblock->next = opblock->next; opblock->next = pblock; } else { pblock->next = pending_blocks; pending_blocks = pblock; } } struct blockvector * make_blockvector () { register struct pending_block *next; register struct blockvector *blockvector; register int i; /* Count the length of the list of blocks. */ for (next = pending_blocks, i = 0; next; next = next->next, i++); blockvector = (struct blockvector *) obstack_alloc (symbol_obstack, (sizeof (struct blockvector) + (i - 1) * sizeof (struct block *))); /* Copy the blocks into the blockvector. This is done in reverse order, which happens to put the blocks into the proper order (ascending starting address). finish_block has hair to insert each block into the list after its subblocks in order to make sure this is true. */ BLOCKVECTOR_NBLOCKS (blockvector) = i; for (next = pending_blocks; next; next = next->next) { BLOCKVECTOR_BLOCK (blockvector, --i) = next->block; } #if 0 /* Now we make the links in the obstack, so don't free them. */ /* Now free the links of the list, and empty the list. */ for (next = pending_blocks; next; next = next1) { next1 = next->next; free (next); } #endif pending_blocks = 0; #if 1 /* FIXME, shut this off after a while to speed up symbol reading. */ /* Some compilers output blocks in the wrong order, but we depend on their being in the right order so we can binary search. Check the order and moan about it. FIXME. */ if (BLOCKVECTOR_NBLOCKS (blockvector) > 1) for (i = 1; i < BLOCKVECTOR_NBLOCKS (blockvector); i++) { if (BLOCK_START(BLOCKVECTOR_BLOCK (blockvector, i-1)) > BLOCK_START(BLOCKVECTOR_BLOCK (blockvector, i))) { complain (&blockvector_complaint, BLOCK_START(BLOCKVECTOR_BLOCK (blockvector, i))); } } #endif return blockvector; } /* Manage the vector of line numbers. */ void record_line (line, pc) int line; CORE_ADDR pc; { struct linetable_entry *e; /* Ignore the dummy line number in libg.o */ if (line == 0xffff) return; /* Make sure line vector is big enough. */ if (line_vector_index + 1 >= line_vector_length) { line_vector_length *= 2; line_vector = (struct linetable *) xrealloc (line_vector, (sizeof (struct linetable) + line_vector_length * sizeof (struct linetable_entry))); current_subfile->line_vector = line_vector; } e = line_vector->item + line_vector_index++; e->line = line; e->pc = pc; } /* Start a new symtab for a new source file. This is called when a dbx symbol of type N_SO is seen; it indicates the start of data for one original source file. */ void start_symtab (name, dirname, start_addr) char *name; char *dirname; CORE_ADDR start_addr; { last_source_file = name; last_source_start_addr = start_addr; file_symbols = 0; global_symbols = 0; within_function = 0; /* Context stack is initially empty, with room for 10 levels. */ context_stack = (struct context_stack *) xmalloc (10 * sizeof (struct context_stack)); context_stack_size = 10; context_stack_depth = 0; new_object_header_files (); type_vector_length = 160; type_vector = (struct type **) xmalloc (type_vector_length * sizeof (struct type *)); bzero (type_vector, type_vector_length * sizeof (struct type *)); /* Initialize the list of sub source files with one entry for this file (the top-level source file). */ subfiles = 0; current_subfile = 0; start_subfile (name, dirname); } /* Finish the symbol definitions for one main source file, close off all the lexical contexts for that file (creating struct block's for them), then make the struct symtab for that file and put it in the list of all such. END_ADDR is the address of the end of the file's text. */ struct symtab * end_symtab (end_addr) CORE_ADDR end_addr; { register struct symtab *symtab; register struct blockvector *blockvector; register struct subfile *subfile; register struct linetable *lv; struct subfile *nextsub; /* Finish the lexical context of the last function in the file; pop the context stack. */ if (context_stack_depth > 0) { register struct context_stack *cstk; context_stack_depth--; cstk = &context_stack[context_stack_depth]; /* Make a block for the local symbols within. */ finish_block (cstk->name, &local_symbols, cstk->old_blocks, cstk->start_addr, end_addr); } /* Cleanup any undefined types that have been left hanging around (this needs to be done before the finish_blocks so that file_symbols is still good). */ cleanup_undefined_types (); /* Define the STATIC_BLOCK and GLOBAL_BLOCK, and build the blockvector. */ finish_block (0, &file_symbols, 0, last_source_start_addr, end_addr); finish_block (0, &global_symbols, 0, last_source_start_addr, end_addr); blockvector = make_blockvector (); current_subfile->line_vector_index = line_vector_index; /* Now create the symtab objects proper, one for each subfile. */ /* (The main file is the last one on the chain.) */ for (subfile = subfiles; subfile; subfile = nextsub) { symtab = allocate_symtab (subfile->name); /* Fill in its components. */ symtab->blockvector = blockvector; lv = subfile->line_vector; lv->nitems = subfile->line_vector_index; symtab->linetable = (struct linetable *) xrealloc (lv, (sizeof (struct linetable) + lv->nitems * sizeof (struct linetable_entry))); symtab->dirname = subfile->dirname; symtab->free_code = free_linetable; symtab->free_ptr = 0; /* There should never already be a symtab for this name, since any prev dups have been removed when the psymtab was read in. FIXME, there ought to be a way to check this here. */ /* FIXME blewit |= free_named_symtabs (symtab->filename); */ /* Link the new symtab into the list of such. */ symtab->next = symtab_list; symtab_list = symtab; nextsub = subfile->next; free (subfile); } free ((char *) type_vector); type_vector = 0; type_vector_length = -1; line_vector = 0; line_vector_length = -1; last_source_file = 0; return symtab; } /* 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 buildsym_init () { free_pendings = 0; file_symbols = 0; global_symbols = 0; pending_blocks = 0; } /* 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 buildsym_new_init () { /* Empty the hash table of global syms looking for values. */ bzero (global_sym_chain, sizeof global_sym_chain); buildsym_init (); } /* 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 misc function list. */ void scan_file_globals () { int hash; int mf; for (mf = 0; mf < misc_function_count; mf++) { char *namestring = misc_function_vector[mf].name; struct symbol *sym, *prev; QUIT; prev = (struct symbol *) 0; /* Get the hash index and check all the symbols under that hash index. */ hash = hashname (namestring); for (sym = global_sym_chain[hash]; sym;) { if (*namestring == SYMBOL_NAME (sym)[0] && !strcmp(namestring + 1, SYMBOL_NAME (sym) + 1)) { /* 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_CLASS (sym) == LOC_BLOCK) fix_common_block (sym, misc_function_vector[mf].address); else SYMBOL_VALUE_ADDRESS (sym) = misc_function_vector[mf].address; if (prev) sym = SYMBOL_VALUE_CHAIN (prev); else sym = global_sym_chain[hash]; } else { prev = sym; sym = SYMBOL_VALUE_CHAIN (sym); } } } } /* 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. */ void read_type_number (pp, typenums) register char **pp; register int *typenums; { if (**pp == '(') { (*pp)++; typenums[0] = read_number (pp, ','); typenums[1] = read_number (pp, ')'); } else { typenums[0] = 0; typenums[1] = read_number (pp, 0); } } /* To handle GNU C++ typename abbreviation, we need to be able to fill in a type's name as soon as space for that type is allocated. `type_synonym_name' is the name of the type being allocated. It is cleared as soon as it is used (lest all allocated types get this name). */ static char *type_synonym_name; /* ARGSUSED */ static struct symbol * define_symbol (valu, string, desc, type) unsigned int valu; char *string; int desc; int type; { register struct symbol *sym; char *p = (char *) strchr (string, ':'); int deftype; int synonym = 0; register int i; /* Ignore syms with empty names. */ if (string[0] == 0) return 0; /* Ignore old-style symbols from cc -go */ if (p == 0) return 0; sym = (struct symbol *)obstack_alloc (symbol_obstack, sizeof (struct symbol)); 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 (string[0] == CPLUS_MARKER) { /* Special GNU C++ names. */ switch (string[1]) { case 't': SYMBOL_NAME (sym) = "this"; break; case 'v': /* $vtbl_ptr_type */ /* Was: SYMBOL_NAME (sym) = "vptr"; */ goto normal; case 'e': SYMBOL_NAME (sym) = "eh_throw"; break; case '_': /* This was an anonymous type that was never fixed up. */ goto normal; default: abort (); } } else { normal: SYMBOL_NAME (sym) = (char *) obstack_alloc (symbol_obstack, ((p - string) + 1)); /* Open-coded bcopy--saves function call time. */ { register char *p1 = string; register char *p2 = SYMBOL_NAME (sym); while (p1 != p) *p2++ = *p1++; *p2++ = '\0'; } } p++; /* Determine the type of name being defined. */ /* 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. */ /* (Peter Watkins @ Computervision) Handle Sun-style local fortran array types 'ar...' . (gnu@cygnus.com) -- this strchr() handles them properly? (tiemann@cygnus.com) -- 'C' is for catch. */ if (!strchr ("cfFGpPrStTvVXC", *p)) deftype = 'l'; else deftype = *p++; /* 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 (deftype == 'c') { if (*p++ != '=') error ("Invalid symbol data at symtab pos %d.", symnum); switch (*p++) { case 'r': { double d = atof (p); char *dbl_valu; SYMBOL_TYPE (sym) = builtin_type_double; dbl_valu = (char *) obstack_alloc (symbol_obstack, sizeof (double)); bcopy (&d, dbl_valu, sizeof (double)); SWAP_TARGET_AND_HOST (dbl_valu, sizeof (double)); SYMBOL_VALUE_BYTES (sym) = dbl_valu; SYMBOL_CLASS (sym) = LOC_CONST_BYTES; } break; case 'i': { SYMBOL_TYPE (sym) = builtin_type_int; SYMBOL_VALUE (sym) = atoi (p); SYMBOL_CLASS (sym) = LOC_CONST; } break; case 'e': /* 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,;"). */ { int typenums[2]; read_type_number (&p, typenums); if (*p++ != ',') error ("Invalid symbol data: no comma in enum const symbol"); SYMBOL_TYPE (sym) = *dbx_lookup_type (typenums); SYMBOL_VALUE (sym) = atoi (p); SYMBOL_CLASS (sym) = LOC_CONST; } break; default: error ("Invalid symbol data at symtab pos %d.", symnum); } SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE; add_symbol_to_list (sym, &file_symbols); return sym; } /* Now usually comes a number that says which data type, and possibly more stuff to define the type (all of which is handled by read_type) */ if (deftype == 'p' && *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))); } else { struct type *type_read; synonym = *p == 't'; if (synonym) { p += 1; type_synonym_name = obsavestring (SYMBOL_NAME (sym), strlen (SYMBOL_NAME (sym))); } type_read = read_type (&p); if ((deftype == 'F' || deftype == 'f') && TYPE_CODE (type_read) != TYPE_CODE_FUNC) { #if 0 /* This code doesn't work -- it needs to realloc and can't. */ struct type *new = (struct type *) obstack_alloc (symbol_obstack, sizeof (struct type)); /* Generate a template for the type of this function. The types of the arguments will be added as we read the symbol table. */ *new = *lookup_function_type (type_read); SYMBOL_TYPE(sym) = new; in_function_type = new; #else SYMBOL_TYPE (sym) = lookup_function_type (type_read); #endif } else SYMBOL_TYPE (sym) = type_read; } switch (deftype) { case 'C': /* The name of a caught exception. */ 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': SYMBOL_CLASS (sym) = LOC_BLOCK; SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE; add_symbol_to_list (sym, &file_symbols); break; case 'F': SYMBOL_CLASS (sym) = LOC_BLOCK; SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE; add_symbol_to_list (sym, &global_symbols); break; 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. */ i = hashname (SYMBOL_NAME (sym)); SYMBOL_VALUE_CHAIN (sym) = global_sym_chain[i]; global_sym_chain[i] = sym; SYMBOL_CLASS (sym) = LOC_STATIC; SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE; 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 'l': SYMBOL_CLASS (sym) = LOC_LOCAL; SYMBOL_VALUE (sym) = valu; SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE; add_symbol_to_list (sym, &local_symbols); break; case 'p': /* 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; #if 0 /* This doesn't work yet. */ add_param_to_type (&in_function_type, sym); #endif add_symbol_to_list (sym, &local_symbols); /* If it's gcc-compiled, if it says `short', believe it. */ if (processing_gcc_compilation || BELIEVE_PCC_PROMOTION) break; #if defined(BELIEVE_PCC_PROMOTION_TYPE) /* This macro 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). Note that this is only different from the BELIEVE_PCC_PROMOTION case on big-endian machines. 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 no 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 (0 == SYMBOL_VALUE (sym) % sizeof (int)) { if (SYMBOL_TYPE (sym) == builtin_type_char || SYMBOL_TYPE (sym) == builtin_type_unsigned_char) SYMBOL_VALUE (sym) += 3; else if (SYMBOL_TYPE (sym) == builtin_type_short || SYMBOL_TYPE (sym) == builtin_type_unsigned_short) SYMBOL_VALUE (sym) += 2; } break; #else /* no BELIEVE_PCC_PROMOTION_TYPE. */ /* If PCC says a parameter is a short or a char, it is really an int. */ if (SYMBOL_TYPE (sym) == builtin_type_char || SYMBOL_TYPE (sym) == builtin_type_short) SYMBOL_TYPE (sym) = builtin_type_int; else if (SYMBOL_TYPE (sym) == builtin_type_unsigned_char || SYMBOL_TYPE (sym) == builtin_type_unsigned_short) SYMBOL_TYPE (sym) = builtin_type_unsigned_int; break; #endif /* no BELIEVE_PCC_PROMOTION_TYPE. */ case 'P': SYMBOL_CLASS (sym) = LOC_REGPARM; SYMBOL_VALUE (sym) = STAB_REG_TO_REGNUM (valu); SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE; add_symbol_to_list (sym, &local_symbols); break; case 'r': SYMBOL_CLASS (sym) = LOC_REGISTER; SYMBOL_VALUE (sym) = STAB_REG_TO_REGNUM (valu); SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE; add_symbol_to_list (sym, &local_symbols); break; case 'S': /* Static symbol at top level of file */ SYMBOL_CLASS (sym) = LOC_STATIC; SYMBOL_VALUE_ADDRESS (sym) = valu; SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE; add_symbol_to_list (sym, &file_symbols); break; case 't': SYMBOL_CLASS (sym) = LOC_TYPEDEF; SYMBOL_VALUE (sym) = valu; SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE; if (TYPE_NAME (SYMBOL_TYPE (sym)) == 0 && (TYPE_FLAGS (SYMBOL_TYPE (sym)) & TYPE_FLAG_PERM) == 0) TYPE_NAME (SYMBOL_TYPE (sym)) = obsavestring (SYMBOL_NAME (sym), strlen (SYMBOL_NAME (sym))); /* 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. */ else 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)); } add_symbol_to_list (sym, &file_symbols); break; case 'T': SYMBOL_CLASS (sym) = LOC_TYPEDEF; SYMBOL_VALUE (sym) = valu; SYMBOL_NAMESPACE (sym) = STRUCT_NAMESPACE; if (TYPE_NAME (SYMBOL_TYPE (sym)) == 0 && (TYPE_FLAGS (SYMBOL_TYPE (sym)) & TYPE_FLAG_PERM) == 0) TYPE_NAME (SYMBOL_TYPE (sym)) = obconcat ("", (TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_ENUM ? "enum " : (TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_STRUCT ? "struct " : "union ")), SYMBOL_NAME (sym)); add_symbol_to_list (sym, &file_symbols); if (synonym) { register struct symbol *typedef_sym = (struct symbol *) obstack_alloc (symbol_obstack, sizeof (struct symbol)); SYMBOL_NAME (typedef_sym) = SYMBOL_NAME (sym); SYMBOL_TYPE (typedef_sym) = SYMBOL_TYPE (sym); SYMBOL_CLASS (typedef_sym) = LOC_TYPEDEF; SYMBOL_VALUE (typedef_sym) = valu; SYMBOL_NAMESPACE (typedef_sym) = VAR_NAMESPACE; add_symbol_to_list (typedef_sym, &file_symbols); } break; case 'V': /* Static symbol of local scope */ SYMBOL_CLASS (sym) = LOC_STATIC; SYMBOL_VALUE_ADDRESS (sym) = valu; SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE; add_symbol_to_list (sym, &local_symbols); break; case 'v': /* Reference parameter */ SYMBOL_CLASS (sym) = LOC_REF_ARG; SYMBOL_VALUE (sym) = valu; 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_CLASS (sym) = LOC_LOCAL; SYMBOL_VALUE (sym) = valu; SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE; add_symbol_to_list (sym, &local_symbols); break; default: error ("Invalid symbol data: unknown symbol-type code `%c' at symtab pos %d.", deftype, symnum); } return sym; } /* 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. */ static void add_undefined_type (type) struct type *type; { if (undef_types_length == undef_types_allocated) { undef_types_allocated *= 2; undef_types = (struct type **) xrealloc (undef_types, undef_types_allocated * sizeof (struct type *)); } undef_types[undef_types_length++] = type; } /* Add here something to go through each undefined type, see if it's still undefined, and do a full lookup if so. */ static void cleanup_undefined_types () { struct type **type; for (type = undef_types; type < undef_types + undef_types_length; type++) { /* Reasonable test to see if it's been defined since. */ if (TYPE_NFIELDS (*type) == 0) { struct pending *ppt; int i; /* Name of the type, without "struct" or "union" */ char *typename = TYPE_NAME (*type); if (!strncmp (typename, "struct ", 7)) typename += 7; if (!strncmp (typename, "union ", 6)) typename += 6; 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)) && !strcmp (SYMBOL_NAME (sym), typename)) bcopy (SYMBOL_TYPE (sym), *type, sizeof (struct type)); } } else /* It has been defined; don't mark it as a stub. */ TYPE_FLAGS (*type) &= ~TYPE_FLAG_STUB; } undef_types_length = 0; } /* 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); 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); ++*pp; or if (**pp != ';') foo = error_type (pp); 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. */ struct type * error_type (pp) char **pp; { complain (&error_type_complaint, 0); while (1) { /* Skip to end of symbol. */ while (**pp != '\0') (*pp)++; /* Check for and handle cretinous dbx symbol name continuation! */ if ((*pp)[-1] == '\\') *pp = next_symbol_text (); else break; } return builtin_type_error; } /* Read a dbx type reference or definition; return the type that is meant. This can be just a number, in which case it references a type already defined and placed in type_vector. Or the number can be followed by an =, in which case it means to define a new type according to the text that follows the =. */ struct type * read_type (pp) register char **pp; { register struct type *type = 0; struct type *type1; int typenums[2]; int xtypenums[2]; /* 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 == '(') { read_type_number (pp, typenums); /* Detect random reference to type not yet defined. Allocate a type object but leave it zeroed. */ if (**pp != '=') return dbx_alloc_type (typenums); *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 += 1; } switch ((*pp)[-1]) { case 'x': { enum type_code code; /* Used to index through file_symbols. */ struct pending *ppt; int i; /* Name including "struct", etc. */ char *type_name; /* Name without "struct", etc. */ char *type_name_only; { char *prefix; char *from, *to; /* Set the type code according to the following letter. */ switch ((*pp)[0]) { case 's': code = TYPE_CODE_STRUCT; prefix = "struct "; break; case 'u': code = TYPE_CODE_UNION; prefix = "union "; break; case 'e': code = TYPE_CODE_ENUM; prefix = "enum "; break; default: return error_type (pp); } to = type_name = (char *) obstack_alloc (symbol_obstack, (strlen (prefix) + ((char *) strchr (*pp, ':') - (*pp)) + 1)); /* Copy the prefix. */ from = prefix; while (*to++ = *from++) ; to--; type_name_only = to; /* Copy the name. */ from = *pp + 1; while ((*to++ = *from++) != ':') ; *--to = '\0'; /* Set the pointer ahead of the name which we just read. */ *pp = from; #if 0 /* The following hack is clearly wrong, because it doesn't check whether we are in a baseclass. I tried to reproduce the case that it is trying to fix, but I couldn't get g++ to put out a cross reference to a basetype. Perhaps it doesn't do it anymore. */ /* Note: for C++, the cross reference may be to a base type which has not yet been seen. In this case, we skip to the comma, which will mark the end of the base class name. (The ':' at the end of the base class name will be skipped as well.) But sometimes (ie. when the cross ref is the last thing on the line) there will be no ','. */ from = (char *) strchr (*pp, ','); if (from) *pp = from; #endif /* 0 */ } /* Now check to see whether the type has already been declared. */ /* This is necessary at least in the case where the program says something like struct foo bar[5]; The compiler puts out a cross-reference; we better find set the length of the structure correctly so we can set the length of the array. */ 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) && !strcmp (SYMBOL_NAME (sym), type_name_only)) { obstack_free (symbol_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); TYPE_CODE (type) = code; TYPE_NAME (type) = type_name; TYPE_FLAGS (type) |= TYPE_FLAG_STUB; add_undefined_type (type); return type; } case '0': case '1': case '2': case '3': case '4': case '5': case '6': case '7': case '8': case '9': case '(': (*pp)--; read_type_number (pp, xtypenums); type = *dbx_lookup_type (xtypenums); if (type == 0) type = builtin_type_void; if (typenums[0] != -1) *dbx_lookup_type (typenums) = type; break; case '*': type1 = read_type (pp); type = lookup_pointer_type (type1); if (typenums[0] != -1) *dbx_lookup_type (typenums) = type; break; case '@': { struct type *domain = read_type (pp); struct type *memtype; if (**pp != ',') /* Invalid member type data format. */ return error_type (pp); ++*pp; memtype = read_type (pp); type = dbx_alloc_type (typenums); smash_to_member_type (type, domain, memtype); } break; case '#': if ((*pp)[0] == '#') { /* We'll get the parameter types from the name. */ struct type *return_type; *pp += 1; return_type = read_type (pp); if (*(*pp)++ != ';') complain (&invalid_member_complaint, symnum); type = allocate_stub_method (return_type); if (typenums[0] != -1) *dbx_lookup_type (typenums) = type; } else { struct type *domain = read_type (pp); struct type *return_type; struct type **args; if (*(*pp)++ != ',') error ("invalid member type data format, at symtab pos %d.", symnum); return_type = read_type (pp); args = read_args (pp, ';'); type = dbx_alloc_type (typenums); smash_to_method_type (type, domain, return_type, args); } break; case '&': type1 = read_type (pp); type = lookup_reference_type (type1); if (typenums[0] != -1) *dbx_lookup_type (typenums) = type; break; case 'f': type1 = read_type (pp); type = lookup_function_type (type1); if (typenums[0] != -1) *dbx_lookup_type (typenums) = type; break; case 'r': type = read_range_type (pp, typenums); if (typenums[0] != -1) *dbx_lookup_type (typenums) = type; break; case 'e': type = dbx_alloc_type (typenums); type = read_enum_type (pp, type); *dbx_lookup_type (typenums) = type; break; case 's': type = dbx_alloc_type (typenums); TYPE_NAME (type) = type_synonym_name; type_synonym_name = 0; type = read_struct_type (pp, type); break; case 'u': type = dbx_alloc_type (typenums); TYPE_NAME (type) = type_synonym_name; type_synonym_name = 0; type = read_struct_type (pp, type); TYPE_CODE (type) = TYPE_CODE_UNION; break; case 'a': if (**pp != 'r') return error_type (pp); ++*pp; type = dbx_alloc_type (typenums); type = read_array_type (pp, type); break; default: --*pp; /* Go back to the symbol in error */ /* Particularly important if it was \0! */ return error_type (pp); } if (type == 0) abort (); #if 0 /* If this is an overriding temporary alteration for a header file's contents, and this type number is unknown in the global definition, put this type into the global definition at this type number. */ if (header_file_prev_index >= 0) { register struct type **tp = explicit_lookup_type (header_file_prev_index, typenums[1]); if (*tp == 0) *tp = type; } #endif return type; } /* This page contains subroutines of read_type. */ /* Read the description of a structure (or union type) and return an object describing the type. */ struct type * read_struct_type (pp, type) char **pp; register struct type *type; { /* Total number of methods defined in this class. If the class defines two `f' methods, and one `g' method, then this will have the value 3. */ int total_length = 0; struct nextfield { struct nextfield *next; int visibility; /* 0=public, 1=protected, 2=public */ struct field field; }; struct next_fnfield { struct next_fnfield *next; int visibility; /* 0=public, 1=protected, 2=public */ struct fn_field fn_field; }; struct next_fnfieldlist { struct next_fnfieldlist *next; struct fn_fieldlist fn_fieldlist; }; register struct nextfield *list = 0; struct nextfield *new; register char *p; int nfields = 0; register int n; register struct next_fnfieldlist *mainlist = 0; int nfn_fields = 0; if (TYPE_MAIN_VARIANT (type) == 0) { TYPE_MAIN_VARIANT (type) = type; } TYPE_CODE (type) = TYPE_CODE_STRUCT; /* First comes the total size in bytes. */ TYPE_LENGTH (type) = read_number (pp, 0); /* C++: Now, if the class is a derived class, then the next character will be a '!', followed by the number of base classes derived from. Each element in the list contains visibility information, the offset of this base class in the derived structure, and then the base type. */ if (**pp == '!') { int i, n_baseclasses, offset; struct type *baseclass; int via_public; /* Nonzero if it is a virtual baseclass, i.e., struct A{}; struct B{}; struct C : public B, public virtual A {}; B is a baseclass of C; A is a virtual baseclass for C. This is a C++ 2.0 language feature. */ int via_virtual; *pp += 1; n_baseclasses = read_number (pp, ','); TYPE_FIELD_VIRTUAL_BITS (type) = (B_TYPE *) obstack_alloc (symbol_obstack, B_BYTES (n_baseclasses)); B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type), n_baseclasses); for (i = 0; i < n_baseclasses; i++) { if (**pp == '\\') *pp = next_symbol_text (); switch (**pp) { case '0': via_virtual = 0; break; case '1': via_virtual = 1; break; default: /* Bad visibility format. */ return error_type (pp); } ++*pp; switch (**pp) { case '0': via_public = 0; break; case '2': via_public = 2; break; default: /* Bad visibility format. */ return error_type (pp); } if (via_virtual) SET_TYPE_FIELD_VIRTUAL (type, i); ++*pp; /* Offset of the portion of the object corresponding to this baseclass. Always zero in the absence of multiple inheritance. */ offset = read_number (pp, ','); baseclass = read_type (pp); *pp += 1; /* skip trailing ';' */ /* Make this baseclass visible for structure-printing purposes. */ new = (struct nextfield *) alloca (sizeof (struct nextfield)); new->next = list; list = new; list->visibility = via_public; list->field.type = baseclass; list->field.name = type_name_no_tag (baseclass); list->field.bitpos = offset; list->field.bitsize = 0; /* this should be an unpacked field! */ nfields++; } TYPE_N_BASECLASSES (type) = n_baseclasses; } /* Now come the fields, as NAME:?TYPENUM,BITPOS,BITSIZE; for each one. 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 `?' is a placeholder for one of '/2' (public visibility), '/1' (protected visibility), '/0' (private visibility), or nothing (C style symbol table, public visibility). */ /* We better set p right now, in case there are no fields at all... */ p = *pp; while (**pp != ';') { /* Check for and handle cretinous dbx symbol name continuation! */ if (**pp == '\\') *pp = next_symbol_text (); /* Get space to record the next field's data. */ new = (struct nextfield *) alloca (sizeof (struct nextfield)); new->next = list; list = new; /* Get the field name. */ p = *pp; if (*p == CPLUS_MARKER) { /* Special GNU C++ name. */ if (*++p == 'v') { const char *prefix; char *name = 0; struct type *context; switch (*++p) { case 'f': prefix = vptr_name; break; case 'b': prefix = vb_name; break; default: error ("invalid abbreviation at symtab pos %d.", symnum); } *pp = p + 1; context = read_type (pp); if (type_name_no_tag (context) == 0) { if (name == 0) error ("type name unknown at symtab pos %d.", symnum); /* FIXME-tiemann: when is `name' ever non-0? */ TYPE_NAME (context) = obsavestring (name, p - name - 1); } list->field.name = obconcat (prefix, type_name_no_tag (context), ""); p = ++(*pp); if (p[-1] != ':') error ("invalid abbreviation at symtab pos %d.", symnum); list->field.type = read_type (pp); (*pp)++; /* Skip the comma. */ list->field.bitpos = read_number (pp, ';'); /* This field is unpacked. */ list->field.bitsize = 0; } /* GNU C++ anonymous type. */ else if (*p == '_') break; else error ("invalid abbreviation at symtab pos %d.", symnum); nfields++; continue; } while (*p != ':') p++; list->field.name = obsavestring (*pp, p - *pp); /* C++: Check to see if we have hit the methods yet. */ if (p[1] == ':') break; *pp = p + 1; /* This means we have a visibility for a field coming. */ if (**pp == '/') { switch (*++*pp) { case '0': list->visibility = 0; /* private */ *pp += 1; break; case '1': list->visibility = 1; /* protected */ *pp += 1; break; case '2': list->visibility = 2; /* public */ *pp += 1; break; } } else /* normal dbx-style format. */ list->visibility = 2; /* public */ list->field.type = read_type (pp); if (**pp == ':') { /* Static class member. */ list->field.bitpos = (long)-1; p = ++(*pp); while (*p != ';') p++; list->field.bitsize = (long) savestring (*pp, p - *pp); *pp = p + 1; nfields++; continue; } else if (**pp != ',') /* Bad structure-type format. */ return error_type (pp); (*pp)++; /* Skip the comma. */ list->field.bitpos = read_number (pp, ','); list->field.bitsize = read_number (pp, ';'); #if 0 /* FIXME-tiemann: Can't the compiler put out something which lets us distinguish these? (or maybe just not put out anything for the field). What is the story here? What does the compiler really do? Also, patch gdb.texinfo for this case; I document it as a possible problem there. Search for "DBX-style". */ /* This is wrong because this is identical to the symbols produced for GCC 0-size arrays. For example: typedef union { int num; char str[0]; } foo; The code which dumped core in such circumstances should be fixed not to dump core. */ /* g++ -g0 can put out bitpos & bitsize zero for a static field. This does not give us any way of getting its class, so we can't know its name. But we can just ignore the field so we don't dump core and other nasty stuff. */ if (list->field.bitpos == 0 && list->field.bitsize == 0) { complain (&dbx_class_complaint, 0); /* Ignore this field. */ list = list->next; } else #endif /* 0 */ { /* 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. */ if (TYPE_CODE (list->field.type) != TYPE_CODE_INT && TYPE_CODE (list->field.type) != TYPE_CODE_ENUM) list->field.bitsize = 0; if ((list->field.bitsize == 8 * TYPE_LENGTH (list->field.type) || (TYPE_CODE (list->field.type) == TYPE_CODE_ENUM && (list->field.bitsize == 8 * TYPE_LENGTH (builtin_type_int)) ) ) && list->field.bitpos % 8 == 0) list->field.bitsize = 0; nfields++; } } if (p[1] == ':') /* chill the list of fields: the last entry (at the head) is a partially constructed entry which we now scrub. */ list = list->next; /* Now 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. */ TYPE_NFIELDS (type) = nfields; TYPE_FIELDS (type) = (struct field *) obstack_alloc (symbol_obstack, sizeof (struct field) * nfields); TYPE_FIELD_PRIVATE_BITS (type) = (B_TYPE *) obstack_alloc (symbol_obstack, B_BYTES (nfields)); B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type), nfields); TYPE_FIELD_PROTECTED_BITS (type) = (B_TYPE *) obstack_alloc (symbol_obstack, B_BYTES (nfields)); B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type), nfields); /* Copy the saved-up fields into the field vector. */ for (n = nfields; list; list = list->next) { n -= 1; TYPE_FIELD (type, n) = list->field; if (list->visibility == 0) SET_TYPE_FIELD_PRIVATE (type, n); else if (list->visibility == 1) SET_TYPE_FIELD_PROTECTED (type, n); } /* Now come the method fields, as NAME::methods where each method is of the form TYPENUM,ARGS,...:PHYSNAME; At the end, we see a semicolon instead of a field. For the case of overloaded operators, the format is OPERATOR::*.methods, where OPERATOR is the string "operator", `*' holds the place for an operator name (such as `+=') and `.' marks the end of the operator name. */ if (p[1] == ':') { /* Now, read in the methods. To simplify matters, we "unread" the name that has been read, so that we can start from the top. */ /* For each list of method lists... */ do { int i; struct next_fnfield *sublist = 0; struct type *look_ahead_type = NULL; int length = 0; struct next_fnfieldlist *new_mainlist = (struct next_fnfieldlist *)alloca (sizeof (struct next_fnfieldlist)); char *main_fn_name; p = *pp; /* read in the name. */ while (*p != ':') p++; if ((*pp)[0] == 'o' && (*pp)[1] == 'p' && (*pp)[2] == CPLUS_MARKER) { /* 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] = {'o', 'p', CPLUS_MARKER}; char *o = opname + 3; /* Skip past '::'. */ p += 2; while (*p != '.') *o++ = *p++; main_fn_name = savestring (opname, o - opname); /* Skip past '.' */ *pp = p + 1; } else { i = 0; main_fn_name = savestring (*pp, p - *pp); /* Skip past '::'. */ *pp = p + 2; } new_mainlist->fn_fieldlist.name = main_fn_name; do { struct next_fnfield *new_sublist = (struct next_fnfield *)alloca (sizeof (struct next_fnfield)); /* Check for and handle cretinous dbx symbol name continuation! */ if (look_ahead_type == NULL) /* Normal case. */ { if (**pp == '\\') *pp = next_symbol_text (); new_sublist->fn_field.type = read_type (pp); if (**pp != ':') /* Invalid symtab info for method. */ return error_type (pp); } else { /* g++ version 1 kludge */ new_sublist->fn_field.type = look_ahead_type; look_ahead_type = NULL; } *pp += 1; p = *pp; while (*p != ';') p++; /* If this is just a stub, then we don't have the real name here. */ new_sublist->fn_field.physname = savestring (*pp, p - *pp); *pp = p + 1; new_sublist->visibility = *(*pp)++ - '0'; if (**pp == '\\') *pp = next_symbol_text (); 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; default: /* This probably just means we're processing a file compiled with g++ version 1. */ complain(&const_vol_complaint, **pp); } switch (*(*pp)++) { case '*': /* 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_number (pp, ';')) + 2; if (**pp == '\\') *pp = next_symbol_text (); 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); if (**pp == ':') { /* g++ version 1 overloaded methods. */ } else { new_sublist->fn_field.fcontext = look_ahead_type; if (**pp != ';') return error_type (pp); else ++*pp; look_ahead_type = NULL; } } break; case '?': /* static member function. */ new_sublist->fn_field.voffset = VOFFSET_STATIC; break; default: /* **pp == '.'. */ /* normal member function. */ new_sublist->fn_field.voffset = 0; new_sublist->fn_field.fcontext = 0; break; } new_sublist->next = sublist; sublist = new_sublist; length++; if (**pp == '\\') *pp = next_symbol_text (); } while (**pp != ';' && **pp != '\0'); *pp += 1; new_mainlist->fn_fieldlist.fn_fields = (struct fn_field *) obstack_alloc (symbol_obstack, sizeof (struct fn_field) * length); TYPE_FN_PRIVATE_BITS (new_mainlist->fn_fieldlist) = (B_TYPE *) obstack_alloc (symbol_obstack, B_BYTES (length)); B_CLRALL (TYPE_FN_PRIVATE_BITS (new_mainlist->fn_fieldlist), length); TYPE_FN_PROTECTED_BITS (new_mainlist->fn_fieldlist) = (B_TYPE *) obstack_alloc (symbol_obstack, B_BYTES (length)); B_CLRALL (TYPE_FN_PROTECTED_BITS (new_mainlist->fn_fieldlist), length); for (i = length; (i--, sublist); sublist = sublist->next) { new_mainlist->fn_fieldlist.fn_fields[i] = sublist->fn_field; if (sublist->visibility == 0) B_SET (new_mainlist->fn_fieldlist.private_fn_field_bits, i); else if (sublist->visibility == 1) B_SET (new_mainlist->fn_fieldlist.protected_fn_field_bits, i); } new_mainlist->fn_fieldlist.length = length; new_mainlist->next = mainlist; mainlist = new_mainlist; nfn_fields++; total_length += length; } while (**pp != ';'); } *pp += 1; TYPE_FN_FIELDLISTS (type) = (struct fn_fieldlist *) obstack_alloc (symbol_obstack, sizeof (struct fn_fieldlist) * nfn_fields); TYPE_NFN_FIELDS (type) = nfn_fields; TYPE_NFN_FIELDS_TOTAL (type) = total_length; { int i; for (i = 0; i < TYPE_N_BASECLASSES (type); ++i) TYPE_NFN_FIELDS_TOTAL (type) += TYPE_NFN_FIELDS_TOTAL (TYPE_BASECLASS (type, i)); } for (n = nfn_fields; mainlist; mainlist = mainlist->next) TYPE_FN_FIELDLISTS (type)[--n] = mainlist->fn_fieldlist; if (**pp == '~') { *pp += 1; if (**pp == '=') { TYPE_FLAGS (type) |= TYPE_FLAG_HAS_CONSTRUCTOR | TYPE_FLAG_HAS_DESTRUCTOR; *pp += 1; } else if (**pp == '+') { TYPE_FLAGS (type) |= TYPE_FLAG_HAS_CONSTRUCTOR; *pp += 1; } else if (**pp == '-') { TYPE_FLAGS (type) |= TYPE_FLAG_HAS_DESTRUCTOR; *pp += 1; } /* Read either a '%' or the final ';'. */ if (*(*pp)++ == '%') { /* Now we must record the virtual function table pointer's field information. */ struct type *t; int i; t = read_type (pp); p = (*pp)++; while (*p != '\0' && *p != ';') p++; if (*p == '\0') /* Premature end of symbol. */ return error_type (pp); TYPE_VPTR_BASETYPE (type) = t; if (type == t) { if (TYPE_FIELD_NAME (t, TYPE_N_BASECLASSES (t)) == 0) { /* FIXME-tiemann: what's this? */ #if 0 TYPE_VPTR_FIELDNO (type) = i = TYPE_N_BASECLASSES (t); #else error_type (pp); #endif } else for (i = TYPE_NFIELDS (t) - 1; i >= TYPE_N_BASECLASSES (t); --i) if (! strncmp (TYPE_FIELD_NAME (t, i), vptr_name, sizeof (vptr_name) -1)) { TYPE_VPTR_FIELDNO (type) = i; break; } if (i < 0) /* Virtual function table field not found. */ return error_type (pp); } else TYPE_VPTR_FIELDNO (type) = TYPE_VPTR_FIELDNO (t); *pp = p + 1; } } 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. */ struct type * read_array_type (pp, type) register char **pp; register struct type *type; { struct type *index_type, *element_type, *range_type; int lower, upper; int adjustable = 0; /* Format of an array type: "ar;lower;upper;". Put code in to handle this. Fortran adjustable arrays use Adigits or Tdigits for lower or upper; for these, produce a type like float[][]. */ index_type = read_type (pp); if (**pp != ';') /* Improper format of array type decl. */ return error_type (pp); ++*pp; if (!(**pp >= '0' && **pp <= '9')) { *pp += 1; adjustable = 1; } lower = read_number (pp, ';'); if (!(**pp >= '0' && **pp <= '9')) { *pp += 1; adjustable = 1; } upper = read_number (pp, ';'); element_type = read_type (pp); if (adjustable) { lower = 0; upper = -1; } { /* Create range type. */ range_type = (struct type *) obstack_alloc (symbol_obstack, sizeof (struct type)); TYPE_CODE (range_type) = TYPE_CODE_RANGE; TYPE_TARGET_TYPE (range_type) = index_type; /* This should never be needed. */ TYPE_LENGTH (range_type) = sizeof (int); TYPE_NFIELDS (range_type) = 2; TYPE_FIELDS (range_type) = (struct field *) obstack_alloc (symbol_obstack, 2 * sizeof (struct field)); TYPE_FIELD_BITPOS (range_type, 0) = lower; TYPE_FIELD_BITPOS (range_type, 1) = upper; } TYPE_CODE (type) = TYPE_CODE_ARRAY; TYPE_TARGET_TYPE (type) = element_type; TYPE_LENGTH (type) = (upper - lower + 1) * TYPE_LENGTH (element_type); TYPE_NFIELDS (type) = 1; TYPE_FIELDS (type) = (struct field *) obstack_alloc (symbol_obstack, sizeof (struct field)); TYPE_FIELD_TYPE (type, 0) = 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. */ struct type * read_enum_type (pp, type) register char **pp; register struct type *type; { 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; if (within_function) symlist = &local_symbols; else symlist = &file_symbols; osyms = *symlist; o_nsyms = osyms ? osyms->nsyms : 0; /* Read the value-names and their values. The input syntax is NAME:VALUE,NAME:VALUE, and so on. A semicolon or comman instead of a NAME means the end. */ while (**pp && **pp != ';' && **pp != ',') { /* Check for and handle cretinous dbx symbol name continuation! */ if (**pp == '\\') *pp = next_symbol_text (); p = *pp; while (*p != ':') p++; name = obsavestring (*pp, p - *pp); *pp = p + 1; n = read_number (pp, ','); sym = (struct symbol *) obstack_alloc (symbol_obstack, sizeof (struct symbol)); bzero (sym, sizeof (struct symbol)); SYMBOL_NAME (sym) = name; SYMBOL_CLASS (sym) = LOC_CONST; SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE; SYMBOL_VALUE (sym) = n; 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) = sizeof (int); TYPE_CODE (type) = TYPE_CODE_ENUM; TYPE_NFIELDS (type) = nsyms; TYPE_FIELDS (type) = (struct field *) obstack_alloc (symbol_obstack, 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 = 0; syms; syms = syms->next) { int j = 0; if (syms == osyms) j = o_nsyms; for (; j < syms->nsyms; j++,n++) { struct symbol *xsym = syms->symbol[j]; SYMBOL_TYPE (xsym) = type; TYPE_FIELD_NAME (type, n) = SYMBOL_NAME (xsym); TYPE_FIELD_VALUE (type, n) = 0; TYPE_FIELD_BITPOS (type, n) = SYMBOL_VALUE (xsym); TYPE_FIELD_BITSIZE (type, n) = 0; } if (syms == osyms) break; } #if 0 /* This screws up perfectly good C programs with enums. FIXME. */ /* Is this Modula-2's BOOLEAN type? Flag it as such if so. */ if(TYPE_NFIELDS(type) == 2 && ((!strcmp(TYPE_FIELD_NAME(type,0),"TRUE") && !strcmp(TYPE_FIELD_NAME(type,1),"FALSE")) || (!strcmp(TYPE_FIELD_NAME(type,1),"TRUE") && !strcmp(TYPE_FIELD_NAME(type,0),"FALSE")))) TYPE_CODE(type) = TYPE_CODE_BOOL; #endif return type; } /* 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 *VALUE and set *BITS to 0. If not, set *BITS to be the number of bits in the number. If encounter garbage, set *BITS to -1. */ void read_huge_number (pp, end, valu, bits) char **pp; int end; long *valu; int *bits; { char *p = *pp; int sign = 1; long n = 0; int radix = 10; char overflow = 0; int nbits = 0; int c; long upper_limit; 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++; } upper_limit = LONG_MAX / radix; while ((c = *p++) >= '0' && c <= ('0' + radix)) { if (n <= upper_limit) { n *= radix; n += c - '0'; /* FIXME this overflows anyway */ } else overflow = 1; /* 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; } /* -0x7f is the same as 0x80. So deal with it by adding one to the number of bits. */ if (sign == -1) ++nbits; if (bits) *bits = nbits; } else { if (valu) *valu = n * sign; if (bits) *bits = 0; } } #define MAX_OF_C_TYPE(t) ((1 << (sizeof (t)*8 - 1)) - 1) #define MIN_OF_C_TYPE(t) (-(1 << (sizeof (t)*8 - 1))) struct type * read_range_type (pp, typenums) char **pp; int typenums[2]; { int rangenums[2]; long n2, n3; int n2bits, n3bits; int self_subrange; struct type *result_type; /* First comes a type we are a subrange of. In C it is usually 0, 1 or the type being defined. */ read_type_number (pp, rangenums); self_subrange = (rangenums[0] == typenums[0] && rangenums[1] == typenums[1]); /* 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. */ read_huge_number (pp, ';', &n2, &n2bits); read_huge_number (pp, ';', &n3, &n3bits); if (n2bits == -1 || n3bits == -1) return error_type (pp); /* 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; /* Range from 0 to is an unsigned large integral type. */ if ((n2bits == 0 && n2 == 0) && n3bits != 0) { got_unsigned = 1; nbits = n3bits; } /* Range from to -1 is a large signed integral type. */ else if (n2bits != 0 && n3bits != 0 && n2bits == n3bits + 1) { got_signed = 1; nbits = n2bits; } /* Check for "long long". */ if (got_signed && nbits == TARGET_LONG_LONG_BIT) return builtin_type_long_long; if (got_unsigned && nbits == TARGET_LONG_LONG_BIT) return builtin_type_unsigned_long_long; if (got_signed || got_unsigned) { result_type = (struct type *) obstack_alloc (symbol_obstack, sizeof (struct type)); bzero (result_type, sizeof (struct type)); TYPE_LENGTH (result_type) = nbits / TARGET_CHAR_BIT; TYPE_MAIN_VARIANT (result_type) = result_type; TYPE_CODE (result_type) = TYPE_CODE_INT; if (got_unsigned) TYPE_FLAGS (result_type) |= TYPE_FLAG_UNSIGNED; return result_type; } else return error_type (pp); } /* A type defined as a subrange of itself, with bounds both 0, is void. */ if (self_subrange && n2 == 0 && n3 == 0) return builtin_type_void; /* If n3 is zero and n2 is not, we want a floating type, and n2 is the width in bytes. Fortran programs appear to use this for complex types also, and they give no way to distinguish between double and single-complex! We don't have complex types, so we would lose on all fortran files! So return type `double' for all of those. It won't work right for the complex values, but at least it makes the file loadable. */ if (n3 == 0 && n2 > 0) { if (n2 == sizeof (float)) return builtin_type_float; return builtin_type_double; } /* If the upper bound is -1, it must really be an unsigned int. */ else if (n2 == 0 && n3 == -1) { if (sizeof (int) == sizeof (long)) return builtin_type_unsigned_int; else return builtin_type_unsigned_long; } /* 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 builtin_type_char; /* Assumptions made here: Subrange of self is equivalent to subrange of int. */ else if (n2 == 0 && (self_subrange || *dbx_lookup_type (rangenums) == builtin_type_int)) { /* an unsigned type */ #ifdef LONG_LONG if (n3 == - sizeof (long long)) return builtin_type_unsigned_long_long; #endif if (n3 == (unsigned int)~0L) return builtin_type_unsigned_int; if (n3 == (unsigned long)~0L) return builtin_type_unsigned_long; if (n3 == (unsigned short)~0L) return builtin_type_unsigned_short; if (n3 == (unsigned char)~0L) return builtin_type_unsigned_char; } #ifdef LONG_LONG else if (n3 == 0 && n2 == -sizeof (long long)) return builtin_type_long_long; #endif else if (n2 == -n3 -1) { /* a signed type */ if (n3 == (1 << (8 * sizeof (int) - 1)) - 1) return builtin_type_int; if (n3 == (1 << (8 * sizeof (long) - 1)) - 1) return builtin_type_long; if (n3 == (1 << (8 * sizeof (short) - 1)) - 1) return builtin_type_short; if (n3 == (1 << (8 * sizeof (char) - 1)) - 1) return builtin_type_char; } /* We have a real range type on our hands. Allocate space and return a real pointer. */ /* At this point I don't have the faintest idea how to deal with a self_subrange type; I'm going to assume that this is used as an idiom, and that all of them are special cases. So . . . */ if (self_subrange) return error_type (pp); result_type = (struct type *) obstack_alloc (symbol_obstack, sizeof (struct type)); bzero (result_type, sizeof (struct type)); TYPE_CODE (result_type) = TYPE_CODE_RANGE; TYPE_TARGET_TYPE (result_type) = *dbx_lookup_type(rangenums); if (TYPE_TARGET_TYPE (result_type) == 0) { complain (&range_type_base_complaint, rangenums[1]); TYPE_TARGET_TYPE (result_type) = builtin_type_int; } TYPE_NFIELDS (result_type) = 2; TYPE_FIELDS (result_type) = (struct field *) obstack_alloc (symbol_obstack, 2 * sizeof (struct field)); bzero (TYPE_FIELDS (result_type), 2 * sizeof (struct field)); TYPE_FIELD_BITPOS (result_type, 0) = n2; TYPE_FIELD_BITPOS (result_type, 1) = n3; #if 0 /* Note that TYPE_LENGTH (result_type) is just overridden a few statements down. What do we really need here? */ /* We have to figure out how many bytes it takes to hold this range type. I'm going to assume that anything that is pushing the bounds of a long was taken care of above. */ if (n2 >= MIN_OF_C_TYPE(char) && n3 <= MAX_OF_C_TYPE(char)) TYPE_LENGTH (result_type) = 1; else if (n2 >= MIN_OF_C_TYPE(short) && n3 <= MAX_OF_C_TYPE(short)) TYPE_LENGTH (result_type) = sizeof (short); else if (n2 >= MIN_OF_C_TYPE(int) && n3 <= MAX_OF_C_TYPE(int)) TYPE_LENGTH (result_type) = sizeof (int); else if (n2 >= MIN_OF_C_TYPE(long) && n3 <= MAX_OF_C_TYPE(long)) TYPE_LENGTH (result_type) = sizeof (long); else /* Ranged type doesn't fit within known sizes. */ /* FIXME -- use "long long" here. */ return error_type (pp); #endif TYPE_LENGTH (result_type) = TYPE_LENGTH (TYPE_TARGET_TYPE (result_type)); return result_type; } /* 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. */ long read_number (pp, end) char **pp; int end; { register char *p = *pp; register long n = 0; register int c; int sign = 1; /* Handle an optional leading minus sign. */ if (*p == '-') { sign = -1; p++; } /* Read the digits, as far as they go. */ while ((c = *p++) >= '0' && c <= '9') { n *= 10; n += c - '0'; } if (end) { if (c && c != end) error ("Invalid symbol data: invalid character \\%03o at symbol pos %d.", c, symnum); } else --p; *pp = p; return n * sign; } /* 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 type **)-1 if there is an error. */ struct type ** read_args (pp, end) char **pp; int end; { struct type *types[1024], **rval; /* allow for fns of 1023 parameters */ int n = 0; while (**pp != end) { if (**pp != ',') /* Invalid argument list: no ','. */ return (struct type **)-1; *pp += 1; /* Check for and handle cretinous dbx symbol name continuation! */ if (**pp == '\\') *pp = next_symbol_text (); types[n++] = read_type (pp); } *pp += 1; /* get past `end' (the ':' character) */ if (n == 1) { rval = (struct type **) xmalloc (2 * sizeof (struct type *)); } else if (TYPE_CODE (types[n-1]) != TYPE_CODE_VOID) { rval = (struct type **) xmalloc ((n + 1) * sizeof (struct type *)); bzero (rval + n, sizeof (struct type *)); } else { rval = (struct type **) xmalloc (n * sizeof (struct type *)); } bcopy (types, rval, n * sizeof (struct type *)); return rval; } /* 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 (sym, valu) struct symbol *sym; int valu; { struct pending *next = (struct pending *) SYMBOL_NAMESPACE (sym); for ( ; next; next = next->next) { register int j; for (j = next->nsyms - 1; j >= 0; j--) SYMBOL_VALUE_ADDRESS (next->symbol[j]) += valu; } } /* Initializer for this module */ void _initialize_buildsym () { undef_types_allocated = 20; undef_types_length = 0; undef_types = (struct type **) xmalloc (undef_types_allocated * sizeof (struct type *)); }