mirror of https://github.com/n-hys/bash.git
152 lines
3.3 KiB
C
152 lines
3.3 KiB
C
/* watch.c - watchpoint functions for malloc */
|
|
|
|
/* Copyright (C) 2001-2003 Free Software Foundation, Inc.
|
|
|
|
This file is part of GNU Bash, the Bourne Again SHell.
|
|
|
|
Bash 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 3 of the License, or
|
|
(at your option) any later version.
|
|
|
|
Bash 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 Bash. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
# include <config.h>
|
|
#endif
|
|
|
|
#include <stdio.h>
|
|
|
|
#include "imalloc.h"
|
|
|
|
#ifdef MALLOC_WATCH
|
|
#include "watch.h"
|
|
|
|
#define WATCH_MAX 32
|
|
|
|
int _malloc_nwatch;
|
|
static PTR_T _malloc_watch_list[WATCH_MAX];
|
|
|
|
static void
|
|
watch_warn (addr, file, line, type, data)
|
|
PTR_T addr;
|
|
const char *file;
|
|
int line, type;
|
|
unsigned long data;
|
|
{
|
|
char *tag;
|
|
|
|
if (type == W_ALLOC)
|
|
tag = "allocated";
|
|
else if (type == W_FREE)
|
|
tag = "freed";
|
|
else if (type == W_REALLOC)
|
|
tag = "requesting resize";
|
|
else if (type == W_RESIZED)
|
|
tag = "just resized";
|
|
else
|
|
tag = "bug: unknown operation";
|
|
|
|
fprintf (stderr, "malloc: watch alert: %p %s ", addr, tag);
|
|
if (data != (unsigned long)-1)
|
|
fprintf (stderr, "(size %lu) ", data);
|
|
fprintf (stderr, "from '%s:%d'\n", file ? file : "unknown", line);
|
|
}
|
|
|
|
void
|
|
_malloc_ckwatch (addr, file, line, type, data)
|
|
PTR_T addr;
|
|
const char *file;
|
|
int line, type;
|
|
unsigned long data;
|
|
{
|
|
register int i;
|
|
|
|
for (i = _malloc_nwatch - 1; i >= 0; i--)
|
|
{
|
|
if (_malloc_watch_list[i] == addr)
|
|
{
|
|
watch_warn (addr, file, line, type, data);
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
#endif /* MALLOC_WATCH */
|
|
|
|
PTR_T
|
|
malloc_watch (addr)
|
|
PTR_T addr;
|
|
{
|
|
register int i;
|
|
PTR_T ret;
|
|
|
|
if (addr == 0)
|
|
return addr;
|
|
ret = (PTR_T)0;
|
|
|
|
#ifdef MALLOC_WATCH
|
|
for (i = _malloc_nwatch - 1; i >= 0; i--)
|
|
{
|
|
if (_malloc_watch_list[i] == addr)
|
|
break;
|
|
}
|
|
if (i < 0)
|
|
{
|
|
if (_malloc_nwatch == WATCH_MAX) /* full, take out first */
|
|
{
|
|
ret = _malloc_watch_list[0];
|
|
_malloc_nwatch--;
|
|
for (i = 0; i < _malloc_nwatch; i++)
|
|
_malloc_watch_list[i] = _malloc_watch_list[i+1];
|
|
}
|
|
_malloc_watch_list[_malloc_nwatch++] = addr;
|
|
}
|
|
#endif
|
|
|
|
return ret;
|
|
}
|
|
|
|
/* Remove a watchpoint set on ADDR. If ADDR is NULL, remove all
|
|
watchpoints. Returns ADDR if everything went OK, NULL if ADDR was
|
|
not being watched. */
|
|
PTR_T
|
|
malloc_unwatch (addr)
|
|
PTR_T addr;
|
|
{
|
|
#ifdef MALLOC_WATCH
|
|
register int i;
|
|
|
|
if (addr == 0)
|
|
{
|
|
for (i = 0; i < _malloc_nwatch; i++)
|
|
_malloc_watch_list[i] = (PTR_T)0;
|
|
_malloc_nwatch = 0;
|
|
return ((PTR_T)0);
|
|
}
|
|
else
|
|
{
|
|
for (i = 0; i < _malloc_nwatch; i++)
|
|
{
|
|
if (_malloc_watch_list[i] == addr)
|
|
break;
|
|
}
|
|
if (i == _malloc_nwatch)
|
|
return ((PTR_T)0); /* not found */
|
|
/* shuffle everything from i+1 to end down 1 */
|
|
_malloc_nwatch--;
|
|
for ( ; i < _malloc_nwatch; i++)
|
|
_malloc_watch_list[i] = _malloc_watch_list[i+1];
|
|
return addr;
|
|
}
|
|
#else
|
|
return ((PTR_T)0);
|
|
#endif
|
|
}
|