Do not create invalid pointers in C code of string functions.
[glibc.git] / nptl / tst-rwlock5.c
blobb3a2fc33e620d3f926feafbb6d37b40dcc84284d
1 /* Copyright (C) 2002-2015 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3 Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <http://www.gnu.org/licenses/>. */
19 #include <pthread.h>
20 #include <signal.h>
21 #include <stdio.h>
22 #include <stdlib.h>
23 #include <unistd.h>
26 static pthread_mutex_t m = PTHREAD_MUTEX_INITIALIZER;
27 static pthread_rwlock_t r;
30 static void *
31 tf (void *arg)
33 if (pthread_rwlock_wrlock (&r) == 0)
35 puts ("child: rwlock_wrlock succeeded");
36 exit (1);
39 puts ("child: rwlock_wrlock returned");
41 exit (1);
45 static int
46 do_test (void)
48 pthread_t th;
50 if (pthread_rwlock_init (&r, NULL) != 0)
52 puts ("rwlock_init failed");
53 return 1;
56 if (pthread_rwlock_wrlock (&r) != 0)
58 puts ("rwlock_wrlock failed");
59 return 1;
62 if (pthread_mutex_lock (&m) != 0)
64 puts ("mutex_lock failed");
65 return 1;
68 /* Set an alarm for 1 second. The wrapper will expect this. */
69 alarm (1);
71 if (pthread_create (&th, NULL, tf, NULL) != 0)
73 puts ("create failed");
74 return 1;
77 /* This call should never return. */
78 pthread_mutex_lock (&m);
80 puts ("2nd mutex_lock returned");
81 return 1;
84 #define EXPECTED_SIGNAL SIGALRM
85 #define TEST_FUNCTION do_test ()
86 #include "../test-skeleton.c"