test based on python's dubious test_3_join_in_forked_from_thread test.

2 files changed, 59 insertions, 0 deletions

diff --git a/regress/lib/libpthread/blocked_join/Makefile b/regress/lib/libpthread/blocked_join/Makefile
new file mode 100644
index 00000000000..0ff3f04b83d
--- /dev/null
+++ b/regress/lib/libpthread/blocked_join/Makefile
@@ -0,0 +1,5 @@
+# $OpenBSD: Makefile,v 1.1 2012/02/27 23:40:37 fgsch Exp $
+
+PROG =	blocked_join
+
+.include <bsd.regress.mk>
diff --git a/regress/lib/libpthread/blocked_join/blocked_join.c b/regress/lib/libpthread/blocked_join/blocked_join.c
new file mode 100644
index 00000000000..0032dfbd184
--- /dev/null
+++ b/regress/lib/libpthread/blocked_join/blocked_join.c
@@ -0,0 +1,54 @@
+/*	$OpenBSD: blocked_join.c,v 1.1 2012/02/27 23:40:37 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:
+		CHECKr(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;
+}