950 lines
27 KiB
C
950 lines
27 KiB
C
/* Support routines for building symbol tables in GDB's internal format.
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Copyright 1986, 1987, 1988, 1989, 1990, 1991, 1992
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Free Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
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/* This module provides subroutines used for creating and adding to
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the symbol table. These routines are called from various symbol-
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file-reading routines.
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Routines to support specific debugging information formats (stabs,
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DWARF, etc) belong somewhere else. */
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#include "defs.h"
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#include "bfd.h"
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#include "obstack.h"
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#include "symtab.h"
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#include "symfile.h" /* Needed for "struct complaint" */
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#include "objfiles.h"
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#include "complaints.h"
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#include <string.h>
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/* Ask buildsym.h to define the vars it normally declares `extern'. */
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#define EXTERN /**/
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#include "buildsym.h" /* Our own declarations */
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#undef EXTERN
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static int
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compare_line_numbers PARAMS ((const void *, const void *));
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static struct blockvector *
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make_blockvector PARAMS ((struct objfile *));
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/* Initial sizes of data structures. These are realloc'd larger if needed,
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and realloc'd down to the size actually used, when completed. */
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#define INITIAL_CONTEXT_STACK_SIZE 10
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#define INITIAL_LINE_VECTOR_LENGTH 1000
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/* Complaints about the symbols we have encountered. */
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struct complaint innerblock_complaint =
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{"inner block not inside outer block in %s", 0, 0};
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struct complaint innerblock_anon_complaint =
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{"inner block not inside outer block", 0, 0};
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struct complaint blockvector_complaint =
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{"block at 0x%lx out of order", 0, 0};
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/* maintain the lists of symbols and blocks */
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/* Add a symbol to one of the lists of symbols. */
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void
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add_symbol_to_list (symbol, listhead)
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struct symbol *symbol;
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struct pending **listhead;
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{
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register struct pending *link;
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/* We keep PENDINGSIZE symbols in each link of the list.
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If we don't have a link with room in it, add a new link. */
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if (*listhead == NULL || (*listhead)->nsyms == PENDINGSIZE)
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{
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if (free_pendings)
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{
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link = free_pendings;
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free_pendings = link->next;
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}
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else
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{
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link = (struct pending *) xmalloc (sizeof (struct pending));
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}
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link->next = *listhead;
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*listhead = link;
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link->nsyms = 0;
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}
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(*listhead)->symbol[(*listhead)->nsyms++] = symbol;
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}
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/* Find a symbol named NAME on a LIST. NAME need not be '\0'-terminated;
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LENGTH is the length of the name. */
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struct symbol *
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find_symbol_in_list (list, name, length)
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struct pending *list;
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char *name;
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int length;
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{
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int j;
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char *pp;
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while (list != NULL)
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{
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for (j = list->nsyms; --j >= 0; )
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{
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pp = SYMBOL_NAME (list->symbol[j]);
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if (*pp == *name && strncmp (pp, name, length) == 0 &&
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pp[length] == '\0')
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{
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return (list->symbol[j]);
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}
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}
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list = list->next;
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}
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return (NULL);
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}
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/* At end of reading syms, or in case of quit,
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really free as many `struct pending's as we can easily find. */
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/* ARGSUSED */
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void
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really_free_pendings (foo)
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int foo;
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{
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struct pending *next, *next1;
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#if 0
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struct pending_block *bnext, *bnext1;
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#endif
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for (next = free_pendings; next; next = next1)
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{
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next1 = next->next;
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free ((PTR)next);
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}
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free_pendings = NULL;
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#if 0 /* Now we make the links in the symbol_obstack, so don't free them. */
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for (bnext = pending_blocks; bnext; bnext = bnext1)
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{
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bnext1 = bnext->next;
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free ((PTR)bnext);
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}
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#endif
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pending_blocks = NULL;
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for (next = file_symbols; next != NULL; next = next1)
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{
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next1 = next->next;
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free ((PTR)next);
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}
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file_symbols = NULL;
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for (next = global_symbols; next != NULL; next = next1)
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{
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next1 = next->next;
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free ((PTR)next);
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}
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global_symbols = NULL;
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}
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/* Take one of the lists of symbols and make a block from it.
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Keep the order the symbols have in the list (reversed from the input file).
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Put the block on the list of pending blocks. */
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void
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finish_block (symbol, listhead, old_blocks, start, end, objfile)
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struct symbol *symbol;
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struct pending **listhead;
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struct pending_block *old_blocks;
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CORE_ADDR start, end;
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struct objfile *objfile;
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{
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register struct pending *next, *next1;
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register struct block *block;
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register struct pending_block *pblock;
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struct pending_block *opblock;
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register int i;
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register int j;
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/* Count the length of the list of symbols. */
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for (next = *listhead, i = 0;
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next;
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i += next->nsyms, next = next->next)
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{
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/*EMPTY*/;
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}
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block = (struct block *) obstack_alloc (&objfile -> symbol_obstack,
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(sizeof (struct block) + ((i - 1) * sizeof (struct symbol *))));
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/* Copy the symbols into the block. */
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BLOCK_NSYMS (block) = i;
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for (next = *listhead; next; next = next->next)
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{
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for (j = next->nsyms - 1; j >= 0; j--)
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{
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BLOCK_SYM (block, --i) = next->symbol[j];
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}
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}
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BLOCK_START (block) = start;
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BLOCK_END (block) = end;
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/* Superblock filled in when containing block is made */
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BLOCK_SUPERBLOCK (block) = NULL;
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BLOCK_GCC_COMPILED (block) = processing_gcc_compilation;
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/* Put the block in as the value of the symbol that names it. */
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if (symbol)
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{
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SYMBOL_BLOCK_VALUE (symbol) = block;
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BLOCK_FUNCTION (block) = symbol;
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}
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else
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{
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BLOCK_FUNCTION (block) = NULL;
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}
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/* Now "free" the links of the list, and empty the list. */
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for (next = *listhead; next; next = next1)
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{
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next1 = next->next;
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next->next = free_pendings;
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free_pendings = next;
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}
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*listhead = NULL;
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/* Install this block as the superblock
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of all blocks made since the start of this scope
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that don't have superblocks yet. */
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opblock = NULL;
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for (pblock = pending_blocks; pblock != old_blocks; pblock = pblock->next)
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{
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if (BLOCK_SUPERBLOCK (pblock->block) == NULL)
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{
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#if 1
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/* Check to be sure the blocks are nested as we receive them.
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If the compiler/assembler/linker work, this just burns a small
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amount of time. */
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if (BLOCK_START (pblock->block) < BLOCK_START (block) ||
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BLOCK_END (pblock->block) > BLOCK_END (block))
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{
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if (symbol)
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{
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complain (&innerblock_complaint,
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SYMBOL_SOURCE_NAME (symbol));
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}
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else
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{
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complain (&innerblock_anon_complaint);
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}
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BLOCK_START (pblock->block) = BLOCK_START (block);
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BLOCK_END (pblock->block) = BLOCK_END (block);
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}
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#endif
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BLOCK_SUPERBLOCK (pblock->block) = block;
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}
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opblock = pblock;
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}
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/* Record this block on the list of all blocks in the file.
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Put it after opblock, or at the beginning if opblock is 0.
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This puts the block in the list after all its subblocks. */
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/* Allocate in the symbol_obstack to save time.
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It wastes a little space. */
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pblock = (struct pending_block *)
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obstack_alloc (&objfile -> symbol_obstack,
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sizeof (struct pending_block));
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pblock->block = block;
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if (opblock)
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{
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pblock->next = opblock->next;
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opblock->next = pblock;
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}
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else
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{
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pblock->next = pending_blocks;
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pending_blocks = pblock;
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}
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}
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static struct blockvector *
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make_blockvector (objfile)
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struct objfile *objfile;
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{
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register struct pending_block *next;
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register struct blockvector *blockvector;
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register int i;
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/* Count the length of the list of blocks. */
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for (next = pending_blocks, i = 0; next; next = next->next, i++) {;}
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blockvector = (struct blockvector *)
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obstack_alloc (&objfile -> symbol_obstack,
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(sizeof (struct blockvector)
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+ (i - 1) * sizeof (struct block *)));
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/* Copy the blocks into the blockvector.
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This is done in reverse order, which happens to put
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the blocks into the proper order (ascending starting address).
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finish_block has hair to insert each block into the list
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after its subblocks in order to make sure this is true. */
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BLOCKVECTOR_NBLOCKS (blockvector) = i;
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for (next = pending_blocks; next; next = next->next)
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{
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BLOCKVECTOR_BLOCK (blockvector, --i) = next->block;
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}
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#if 0 /* Now we make the links in the obstack, so don't free them. */
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/* Now free the links of the list, and empty the list. */
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for (next = pending_blocks; next; next = next1)
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{
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next1 = next->next;
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free (next);
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}
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#endif
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pending_blocks = NULL;
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#if 1 /* FIXME, shut this off after a while to speed up symbol reading. */
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/* Some compilers output blocks in the wrong order, but we depend
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on their being in the right order so we can binary search.
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Check the order and moan about it. FIXME. */
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if (BLOCKVECTOR_NBLOCKS (blockvector) > 1)
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{
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for (i = 1; i < BLOCKVECTOR_NBLOCKS (blockvector); i++)
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{
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if (BLOCK_START(BLOCKVECTOR_BLOCK (blockvector, i-1))
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> BLOCK_START(BLOCKVECTOR_BLOCK (blockvector, i)))
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{
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complain (&blockvector_complaint,
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(unsigned long) BLOCK_START(BLOCKVECTOR_BLOCK (blockvector, i)));
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}
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}
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}
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#endif
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return (blockvector);
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}
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/* Start recording information about source code that came from an included
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(or otherwise merged-in) source file with a different name. NAME is
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the name of the file (cannot be NULL), DIRNAME is the directory in which
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it resides (or NULL if not known). */
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void
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start_subfile (name, dirname)
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char *name;
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char *dirname;
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{
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register struct subfile *subfile;
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/* See if this subfile is already known as a subfile of the
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current main source file. */
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for (subfile = subfiles; subfile; subfile = subfile->next)
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{
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if (STREQ (subfile->name, name))
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{
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current_subfile = subfile;
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return;
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}
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}
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/* This subfile is not known. Add an entry for it.
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Make an entry for this subfile in the list of all subfiles
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of the current main source file. */
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subfile = (struct subfile *) xmalloc (sizeof (struct subfile));
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subfile->next = subfiles;
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subfiles = subfile;
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current_subfile = subfile;
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/* Save its name and compilation directory name */
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subfile->name = (name == NULL)? NULL : strdup (name);
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subfile->dirname = (dirname == NULL) ? NULL : strdup (dirname);
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/* Initialize line-number recording for this subfile. */
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subfile->line_vector = NULL;
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/* Default the source language to whatever can be deduced from
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the filename. If nothing can be deduced (such as for a C/C++
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include file with a ".h" extension), then inherit whatever
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language the previous subfile had. This kludgery is necessary
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because there is no standard way in some object formats to
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record the source language. Also, when symtabs are allocated
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we try to deduce a language then as well, but it is too late
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for us to use that information while reading symbols, since
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symtabs aren't allocated until after all the symbols have
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been processed for a given source file. */
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subfile->language = deduce_language_from_filename (subfile->name);
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if (subfile->language == language_unknown &&
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subfile->next != NULL)
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{
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subfile->language = subfile->next->language;
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}
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/* cfront output is a C program, so in most ways it looks like a C
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program. But to demangle we need to set the language to C++. We
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can distinguish cfront code by the fact that it has #line
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directives which specify a file name ending in .C.
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So if the filename of this subfile ends in .C, then change the language
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of any pending subfiles from C to C++. We also accept any other C++
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suffixes accepted by deduce_language_from_filename (in particular,
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some people use .cxx with cfront). */
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if (subfile->name)
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{
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struct subfile *s;
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if (deduce_language_from_filename (subfile->name) == language_cplus)
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for (s = subfiles; s != NULL; s = s->next)
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if (s->language == language_c)
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s->language = language_cplus;
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}
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/* And patch up this file if necessary. */
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if (subfile->language == language_c
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&& subfile->next != NULL
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&& subfile->next->language == language_cplus)
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{
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subfile->language = language_cplus;
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}
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}
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/* For stabs readers, the first N_SO symbol is assumed to be the source
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file name, and the subfile struct is initialized using that assumption.
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If another N_SO symbol is later seen, immediately following the first
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one, then the first one is assumed to be the directory name and the
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second one is really the source file name.
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So we have to patch up the subfile struct by moving the old name value to
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dirname and remembering the new name. Some sanity checking is performed
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to ensure that the state of the subfile struct is reasonable and that the
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old name we are assuming to be a directory name actually is (by checking
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for a trailing '/'). */
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void
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patch_subfile_names (subfile, name)
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struct subfile *subfile;
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char *name;
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{
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if (subfile != NULL && subfile->dirname == NULL && subfile->name != NULL
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&& subfile->name[strlen(subfile->name)-1] == '/')
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{
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subfile->dirname = subfile->name;
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subfile->name = strdup (name);
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/* Default the source language to whatever can be deduced from
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the filename. If nothing can be deduced (such as for a C/C++
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include file with a ".h" extension), then inherit whatever
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language the previous subfile had. This kludgery is necessary
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because there is no standard way in some object formats to
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record the source language. Also, when symtabs are allocated
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we try to deduce a language then as well, but it is too late
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for us to use that information while reading symbols, since
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symtabs aren't allocated until after all the symbols have
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been processed for a given source file. */
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subfile->language = deduce_language_from_filename (subfile->name);
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if (subfile->language == language_unknown &&
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subfile->next != NULL)
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{
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subfile->language = subfile->next->language;
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}
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}
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}
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/* Handle the N_BINCL and N_EINCL symbol types
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that act like N_SOL for switching source files
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(different subfiles, as we call them) within one object file,
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but using a stack rather than in an arbitrary order. */
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void
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push_subfile ()
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{
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register struct subfile_stack *tem
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= (struct subfile_stack *) xmalloc (sizeof (struct subfile_stack));
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tem->next = subfile_stack;
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subfile_stack = tem;
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if (current_subfile == NULL || current_subfile->name == NULL)
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{
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abort ();
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}
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tem->name = current_subfile->name;
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}
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char *
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pop_subfile ()
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{
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register char *name;
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register struct subfile_stack *link = subfile_stack;
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if (link == NULL)
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{
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abort ();
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}
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name = link->name;
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subfile_stack = link->next;
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free ((PTR)link);
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return (name);
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}
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/* Add a linetable entry for line number LINE and address PC to the line
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vector for SUBFILE. */
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void
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record_line (subfile, line, pc)
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register struct subfile *subfile;
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int line;
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CORE_ADDR pc;
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{
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struct linetable_entry *e;
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/* Ignore the dummy line number in libg.o */
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if (line == 0xffff)
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{
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return;
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}
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/* Make sure line vector exists and is big enough. */
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if (!subfile->line_vector)
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{
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subfile->line_vector_length = INITIAL_LINE_VECTOR_LENGTH;
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subfile->line_vector = (struct linetable *)
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xmalloc (sizeof (struct linetable)
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+ subfile->line_vector_length * sizeof (struct linetable_entry));
|
||
subfile->line_vector->nitems = 0;
|
||
}
|
||
|
||
if (subfile->line_vector->nitems + 1 >= subfile->line_vector_length)
|
||
{
|
||
subfile->line_vector_length *= 2;
|
||
subfile->line_vector = (struct linetable *)
|
||
xrealloc ((char *) subfile->line_vector, (sizeof (struct linetable)
|
||
+ subfile->line_vector_length * sizeof (struct linetable_entry)));
|
||
}
|
||
|
||
e = subfile->line_vector->item + subfile->line_vector->nitems++;
|
||
e->line = line; e->pc = pc;
|
||
}
|
||
|
||
|
||
/* Needed in order to sort line tables from IBM xcoff files. Sigh! */
|
||
|
||
static int
|
||
compare_line_numbers (ln1p, ln2p)
|
||
const PTR ln1p;
|
||
const PTR ln2p;
|
||
{
|
||
struct linetable_entry *ln1 = (struct linetable_entry *) ln1p;
|
||
struct linetable_entry *ln2 = (struct linetable_entry *) ln2p;
|
||
|
||
/* Note: this code does not assume that CORE_ADDRs can fit in ints.
|
||
Please keep it that way. */
|
||
if (ln1->pc < ln2->pc)
|
||
return -1;
|
||
|
||
if (ln1->pc > ln2->pc)
|
||
return 1;
|
||
|
||
/* If pc equal, sort by line. I'm not sure whether this is optimum
|
||
behavior (see comment at struct linetable in symtab.h). */
|
||
return ln1->line - ln2->line;
|
||
}
|
||
|
||
|
||
/* Start a new symtab for a new source file.
|
||
Called, for example, when a stabs symbol of type N_SO is seen, or when
|
||
a DWARF TAG_compile_unit DIE 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 = NULL;
|
||
global_symbols = NULL;
|
||
within_function = 0;
|
||
|
||
/* Context stack is initially empty. Allocate first one with room for
|
||
10 levels; reuse it forever afterward. */
|
||
if (context_stack == NULL)
|
||
{
|
||
context_stack_size = INITIAL_CONTEXT_STACK_SIZE;
|
||
context_stack = (struct context_stack *)
|
||
xmalloc (context_stack_size * sizeof (struct context_stack));
|
||
}
|
||
context_stack_depth = 0;
|
||
|
||
/* Initialize the list of sub source files with one entry
|
||
for this file (the top-level source file). */
|
||
|
||
subfiles = NULL;
|
||
current_subfile = NULL;
|
||
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.
|
||
SECTION is the section number (in objfile->section_offsets) of
|
||
the blockvector and linetable.
|
||
|
||
Note that it is possible for end_symtab() to return NULL. In particular,
|
||
for the DWARF case at least, it will return NULL when it finds a
|
||
compilation unit that has exactly one DIE, a TAG_compile_unit DIE. This
|
||
can happen when we link in an object file that was compiled from an empty
|
||
source file. Returning NULL is probably not the correct thing to do,
|
||
because then gdb will never know about this empty file (FIXME). */
|
||
|
||
struct symtab *
|
||
end_symtab (end_addr, sort_pending, sort_linevec, objfile, section)
|
||
CORE_ADDR end_addr;
|
||
int sort_pending;
|
||
int sort_linevec;
|
||
struct objfile *objfile;
|
||
int section;
|
||
{
|
||
register struct symtab *symtab = NULL;
|
||
register struct blockvector *blockvector;
|
||
register struct subfile *subfile;
|
||
register struct context_stack *cstk;
|
||
struct subfile *nextsub;
|
||
|
||
/* Finish the lexical context of the last function in the file;
|
||
pop the context stack. */
|
||
|
||
if (context_stack_depth > 0)
|
||
{
|
||
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, objfile);
|
||
|
||
if (context_stack_depth > 0)
|
||
{
|
||
/* This is said to happen with SCO. The old coffread.c code
|
||
simply emptied the context stack, so we do the same. FIXME:
|
||
Find out why it is happening. This is not believed to happen
|
||
in most cases (even for coffread.c); it used to be an abort(). */
|
||
static struct complaint msg =
|
||
{"Context stack not empty in end_symtab", 0, 0};
|
||
complain (&msg);
|
||
context_stack_depth = 0;
|
||
}
|
||
}
|
||
|
||
/* It is unfortunate that in xcoff, pending blocks might not be ordered
|
||
in this stage. Especially, blocks for static functions will show up at
|
||
the end. We need to sort them, so tools like `find_pc_function' and
|
||
`find_pc_block' can work reliably. */
|
||
|
||
if (sort_pending && pending_blocks)
|
||
{
|
||
/* FIXME! Remove this horrid bubble sort and use qsort!!! */
|
||
int swapped;
|
||
do
|
||
{
|
||
struct pending_block *pb, *pbnext;
|
||
|
||
pb = pending_blocks;
|
||
pbnext = pb->next;
|
||
swapped = 0;
|
||
|
||
while (pbnext)
|
||
{
|
||
/* swap blocks if unordered! */
|
||
|
||
if (BLOCK_START(pb->block) < BLOCK_START(pbnext->block))
|
||
{
|
||
struct block *tmp = pb->block;
|
||
pb->block = pbnext->block;
|
||
pbnext->block = tmp;
|
||
swapped = 1;
|
||
}
|
||
pb = pbnext;
|
||
pbnext = pbnext->next;
|
||
}
|
||
} while (swapped);
|
||
}
|
||
|
||
/* 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).
|
||
|
||
Both cleanup_undefined_types and finish_global_stabs are stabs
|
||
specific, but harmless for other symbol readers, since on gdb
|
||
startup or when finished reading stabs, the state is set so these
|
||
are no-ops. FIXME: Is this handled right in case of QUIT? Can
|
||
we make this cleaner? */
|
||
|
||
cleanup_undefined_types ();
|
||
finish_global_stabs (objfile);
|
||
|
||
if (pending_blocks == NULL
|
||
&& file_symbols == NULL
|
||
&& global_symbols == NULL)
|
||
{
|
||
/* Ignore symtabs that have no functions with real debugging info */
|
||
blockvector = NULL;
|
||
}
|
||
else
|
||
{
|
||
/* Define the STATIC_BLOCK & GLOBAL_BLOCK, and build the blockvector. */
|
||
finish_block (0, &file_symbols, 0, last_source_start_addr, end_addr,
|
||
objfile);
|
||
finish_block (0, &global_symbols, 0, last_source_start_addr, end_addr,
|
||
objfile);
|
||
blockvector = make_blockvector (objfile);
|
||
}
|
||
|
||
#ifdef PROCESS_LINENUMBER_HOOK
|
||
PROCESS_LINENUMBER_HOOK (); /* Needed for xcoff. */
|
||
#endif
|
||
|
||
/* 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)
|
||
{
|
||
int linetablesize = 0;
|
||
/* If we have blocks of symbols, make a symtab.
|
||
Otherwise, just ignore this file and any line number info in it. */
|
||
symtab = NULL;
|
||
if (blockvector)
|
||
{
|
||
if (subfile->line_vector)
|
||
{
|
||
linetablesize = sizeof (struct linetable) +
|
||
subfile->line_vector->nitems * sizeof (struct linetable_entry);
|
||
#if 0
|
||
/* I think this is artifact from before it went on the obstack.
|
||
I doubt we'll need the memory between now and when we
|
||
free it later in this function. */
|
||
/* First, shrink the linetable to make more memory. */
|
||
subfile->line_vector = (struct linetable *)
|
||
xrealloc ((char *) subfile->line_vector, linetablesize);
|
||
#endif
|
||
/* If sort_linevec is false, we might want just check to make
|
||
sure they are sorted and complain() if not, as a way of
|
||
tracking down compilers/symbol readers which don't get
|
||
them sorted right. */
|
||
|
||
if (sort_linevec)
|
||
qsort (subfile->line_vector->item,
|
||
subfile->line_vector->nitems,
|
||
sizeof (struct linetable_entry), compare_line_numbers);
|
||
}
|
||
|
||
/* Now, allocate a symbol table. */
|
||
symtab = allocate_symtab (subfile->name, objfile);
|
||
|
||
/* Fill in its components. */
|
||
symtab->blockvector = blockvector;
|
||
if (subfile->line_vector)
|
||
{
|
||
/* Reallocate the line table on the symbol obstack */
|
||
symtab->linetable = (struct linetable *)
|
||
obstack_alloc (&objfile -> symbol_obstack, linetablesize);
|
||
memcpy (symtab->linetable, subfile->line_vector, linetablesize);
|
||
}
|
||
else
|
||
{
|
||
symtab->linetable = NULL;
|
||
}
|
||
symtab->block_line_section = section;
|
||
if (subfile->dirname)
|
||
{
|
||
/* Reallocate the dirname on the symbol obstack */
|
||
symtab->dirname = (char *)
|
||
obstack_alloc (&objfile -> symbol_obstack,
|
||
strlen (subfile -> dirname) + 1);
|
||
strcpy (symtab->dirname, subfile->dirname);
|
||
}
|
||
else
|
||
{
|
||
symtab->dirname = NULL;
|
||
}
|
||
symtab->free_code = free_linetable;
|
||
symtab->free_ptr = NULL;
|
||
|
||
/* Use whatever language we have been using for this subfile,
|
||
not the one that was deduced in allocate_symtab from the
|
||
filename. We already did our own deducing when we created
|
||
the subfile, and we may have altered our opinion of what
|
||
language it is from things we found in the symbols. */
|
||
symtab->language = subfile->language;
|
||
|
||
/* All symtabs for the main file and the subfiles share a
|
||
blockvector, so we need to clear primary for everything but
|
||
the main file. */
|
||
|
||
symtab->primary = 0;
|
||
}
|
||
if (subfile->name != NULL)
|
||
{
|
||
free ((PTR) subfile->name);
|
||
}
|
||
if (subfile->dirname != NULL)
|
||
{
|
||
free ((PTR) subfile->dirname);
|
||
}
|
||
if (subfile->line_vector != NULL)
|
||
{
|
||
free ((PTR) subfile->line_vector);
|
||
}
|
||
|
||
nextsub = subfile->next;
|
||
free ((PTR)subfile);
|
||
}
|
||
|
||
/* Set this for the main source file. */
|
||
if (symtab)
|
||
{
|
||
symtab->primary = 1;
|
||
}
|
||
|
||
last_source_file = NULL;
|
||
current_subfile = NULL;
|
||
|
||
return (symtab);
|
||
}
|
||
|
||
|
||
/* Push a context block. Args are an identifying nesting level (checkable
|
||
when you pop it), and the starting PC address of this context. */
|
||
|
||
struct context_stack *
|
||
push_context (desc, valu)
|
||
int desc;
|
||
CORE_ADDR valu;
|
||
{
|
||
register struct context_stack *new;
|
||
|
||
if (context_stack_depth == context_stack_size)
|
||
{
|
||
context_stack_size *= 2;
|
||
context_stack = (struct context_stack *)
|
||
xrealloc ((char *) context_stack,
|
||
(context_stack_size * sizeof (struct context_stack)));
|
||
}
|
||
|
||
new = &context_stack[context_stack_depth++];
|
||
new->depth = desc;
|
||
new->locals = local_symbols;
|
||
new->old_blocks = pending_blocks;
|
||
new->start_addr = valu;
|
||
new->name = NULL;
|
||
|
||
local_symbols = NULL;
|
||
|
||
return (new);
|
||
}
|
||
|
||
|
||
/* Compute a small integer hash code for the given name. */
|
||
|
||
int
|
||
hashname (name)
|
||
char *name;
|
||
{
|
||
register char *p = name;
|
||
register int total = p[0];
|
||
register int c;
|
||
|
||
c = p[1];
|
||
total += c << 2;
|
||
if (c)
|
||
{
|
||
c = p[2];
|
||
total += c << 4;
|
||
if (c)
|
||
{
|
||
total += p[3] << 6;
|
||
}
|
||
}
|
||
|
||
/* Ensure result is positive. */
|
||
if (total < 0)
|
||
{
|
||
total += (1000 << 6);
|
||
}
|
||
return (total % HASHSIZE);
|
||
}
|
||
|
||
|
||
/* 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 = NULL;
|
||
file_symbols = NULL;
|
||
global_symbols = NULL;
|
||
pending_blocks = NULL;
|
||
}
|
||
|
||
/* 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 ()
|
||
{
|
||
buildsym_init ();
|
||
}
|
||
|
||
/* Initializer for this module */
|
||
|
||
void
|
||
_initialize_buildsym ()
|
||
{
|
||
}
|