/*      $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;
}