2 * Copyright (C) 2017 Andreas Schneider <asn@samba.org>
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
17 * 3. Neither the name of the author nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
41 #ifdef HAVE_CONSTRUCTOR_ATTRIBUTE
42 #define CONSTRUCTOR_ATTRIBUTE __attribute__ ((constructor))
44 #define CONSTRUCTOR_ATTRIBUTE
45 #endif /* HAVE_CONSTRUCTOR_ATTRIBUTE */
46 #if ! defined(HAVE_CONSTRUCTOR_ATTRIBUTE) && defined(HAVE_PRAGMA_INIT)
47 /* xlC and other oldschool compilers support (only) this */
48 #pragma init (thread_deadlock_constructor)
50 void thread_deadlock_constructor(void) CONSTRUCTOR_ATTRIBUTE;
52 static void thread_deadlock_prepare(void)
54 pthread_kill(pthread_self(), SIGUSR1);
58 static void thread_deadlock_parent(void)
63 static void thread_deadlock_child(void)
68 void thread_deadlock_constructor(void)
70 pthread_atfork(&thread_deadlock_prepare,
71 &thread_deadlock_parent,
72 &thread_deadlock_child);