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/* $OpenBSD: blocked_join.c,v 1.2 2012/08/22 22:51:27 fgsch Exp $ */
/*
* Federico G. Schwindt <fgsch@openbsd.org>, 2012. Public Domain.
*/
#include <sys/types.h>
#include <sys/wait.h>
#include <pthread.h>
#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#include "test.h"
void *
deadlock_detector(void *arg)
{
sleep(10);
PANIC("deadlock detected");
}
void *
joiner(void *arg)
{
pthread_t mainthread = *(pthread_t *)arg;
ASSERT(pthread_join(mainthread, NULL) == EDEADLK);
return (NULL);
}
int
main(int argc, char **argv)
{
pthread_t d, t, self = pthread_self();
pid_t pid;
switch ((pid = fork())) {
case -1:
PANIC("cannot fork");
/* NOTREACHED */
case 0:
/* child */
break;
default:
CHECKe(waitpid(pid, NULL, 0));
_exit(0);
/* NOTREACHED */
}
CHECKr(pthread_create(&d, NULL, deadlock_detector, NULL));
CHECKr(pthread_create(&t, NULL, joiner, &self));
CHECKr(pthread_join(t, NULL));
SUCCEED;
}
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