1 /* watch.c - watchpoint functions for malloc */
3 /* Copyright (C) 2001 Free Software Foundation, Inc.
5 This file is part of GNU Bash, the Bourne Again SHell.
7 Bash is free software; you can redistribute it and/or modify it under
8 the terms of the GNU General Public License as published by the Free
9 Software Foundation; either version 2, or (at your option) any later
12 Bash is distributed in the hope that it will be useful, but WITHOUT ANY
13 WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
17 You should have received a copy of the GNU General Public License along
18 with Bash; see the file COPYING. If not, write to the Free Software
19 Foundation, 59 Temple Place, Suite 330, Boston, MA 02111 USA. */
34 static PTR_T _malloc_watch_list[WATCH_MAX];
37 watch_warn (addr, file, line, type, data)
47 else if (type == W_FREE)
49 else if (type == W_REALLOC)
50 tag = "requesting resize";
51 else if (type == W_RESIZED)
54 tag = "bug: unknown operation";
56 fprintf (stderr, "malloc: watch alert: %p %s ", addr, tag);
57 if (data != (unsigned long)-1)
58 fprintf (stderr, "(size %lu) ", data);
59 fprintf (stderr, "from '%s:%d'\n", file ? file : "unknown", line);
63 _malloc_ckwatch (addr, file, line, type, data)
71 for (i = _malloc_nwatch - 1; i >= 0; i--)
73 if (_malloc_watch_list[i] == addr)
75 watch_warn (addr, file, line, type, data);
80 #endif /* MALLOC_WATCH */
94 for (i = _malloc_nwatch - 1; i >= 0; i--)
96 if (_malloc_watch_list[i] == addr)
101 if (_malloc_nwatch == WATCH_MAX) /* full, take out first */
103 ret = _malloc_watch_list[0];
105 for (i = 0; i < _malloc_nwatch; i++)
106 _malloc_watch_list[i] = _malloc_watch_list[i+1];
108 _malloc_watch_list[_malloc_nwatch++] = addr;
115 /* Remove a watchpoint set on ADDR. If ADDR is NULL, remove all
116 watchpoints. Returns ADDR if everything went OK, NULL if ADDR was
117 not being watched. */
119 malloc_unwatch (addr)
127 for (i = 0; i < _malloc_nwatch; i++)
128 _malloc_watch_list[i] = (PTR_T)0;
134 for (i = 0; i < _malloc_nwatch; i++)
136 if (_malloc_watch_list[i] == addr)
139 if (i == _malloc_nwatch)
140 return ((PTR_T)0); /* not found */
141 /* shuffle everything from i+1 to end down 1 */
143 for ( ; i < _malloc_nwatch; i++)
144 _malloc_watch_list[i] = _malloc_watch_list[i+1];