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/* Copyright (C) 2006 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#include <pthread.h>
#include <errno.h>
#include <stdio.h>
#include <signal.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/wait.h>
#include <sys/time.h>
#include <limits.h>
pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER;
pthread_mutex_t mutex2 = PTHREAD_MUTEX_INITIALIZER;
pthread_cond_t cond = PTHREAD_COND_INITIALIZER;
static void *
tf (void *arg)
{
int fd = (long) arg;
int pid = getpid ();
#ifdef TIMED
struct timespec ts;
#endif
if (pthread_mutex_lock (&mutex) != 0)
{
puts ("Could not lock mutex in thread");
return (void *) 1L;
}
write (fd, &pid, sizeof (int));
if (pthread_mutex_unlock (&mutex2) != 0)
{
puts ("Could not unlock mutex2 in thread");
return (void *) 1L;
}
#ifdef TIMED
ts.tv_sec = INT_MAX;
ts.tv_nsec = 0;
if (pthread_cond_timedwait (&cond, &mutex, &ts) != 0)
{
puts ("pthread_cond_wait failed in thread");
return (void *) 1L;
}
#else
if (pthread_cond_wait (&cond, &mutex) != 0)
{
puts ("pthread_cond_wait failed in thread");
return (void *) 1L;
}
#endif
if (pthread_mutex_unlock (&mutex) != 0)
{
puts ("Could not unlock mutex in thread");
return (void *) 1L;
}
return NULL;
}
static void
sig_segv (int unused)
{
exit (2);
}
int
do_test (void)
{
int fds[2];
pthread_t thr;
if (pipe (fds) < 0)
{
printf ("couldn't create pipe: %m\n");
return 1;
}
pid_t pid = fork ();
if (pid < 0)
{
printf ("fork failed: %m\n");
return 1;
}
if (!pid)
{
void *ret;
close (fds[0]);
signal (SIGSEGV, sig_segv);
pthread_mutex_lock (&mutex2);
pthread_create (&thr, NULL, tf, (void *) (long) (fds[1]));
/* Wait for the thread to go into cond_wait. */
pthread_mutex_lock (&mutex2);
pthread_mutex_lock (&mutex);
write (fds[1], "", 1);
pthread_join (thr, &ret);
exit (0);
}
close (fds[1]);
int child_pid;
if (TEMP_FAILURE_RETRY (read (fds[0], &child_pid, sizeof (int)))
!= sizeof (int))
{
puts ("could not read pid from child");
return 1;
}
char dummy;
if (TEMP_FAILURE_RETRY (read (fds[0], &dummy, 1)) != 1)
{
puts ("could not read sync byte from child");
return 1;
}
close (fds[0]);
/* The sync byte may come immediately after the mutex is released;
wait a little bit more to make sure the thread has suspended, to
test the right bug. */
struct timespec ts;
ts.tv_sec = 0;
ts.tv_nsec = 200000000;
nanosleep (&ts, NULL);
kill (child_pid, SIGSEGV);
pid_t termpid;
int status;
termpid = TEMP_FAILURE_RETRY (waitpid (pid, &status, 0));
if (termpid == -1)
{
printf ("waitpid failed: %m\n");
return 1;
}
else if (termpid != pid)
{
printf ("waitpid returned %ld != %ld\n",
(long int) termpid, (long int) pid);
return 1;
}
else if (!WIFEXITED (status) || WEXITSTATUS (status) != 2)
{
puts ("child hasn't exited with exit status 2");
return 1;
}
return 0;
}
#define TEST_FUNCTION do_test ()
#include "../test-skeleton.c"
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