zdtm: Update futex-rl test for thread leader

Don't forget to test thread leader as well.
Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

test/zdtm/live/static/futex-rl.c

@@ -62,6 +62,8 @@ out:
 
 int main(int argc, char **argv)
 {
+	struct robust_list_head *head_orig = NULL, *head_new = NULL;
+	size_t len_orig = 0, len_new = 0;
 	pthread_t thread;
 	struct args *args;
 
@@ -73,6 +75,12 @@ int main(int argc, char **argv)
 		exit(1);
 	}
 
+	test_msg("Obtaining old RL for thread-leader\n");
+	if (syscall(__NR_get_robust_list, __gettid(), &head_orig, &len_orig)) {
+		fail("__NR_get_robust_list failed");
+		exit(1);
+	}
+
 	task_waiter_init(&args->waiter);
 	args->result = 0;
 
@@ -95,6 +103,17 @@ int main(int argc, char **argv)
 
 	task_waiter_complete(&args->waiter, 2);
 
+	test_msg("Obtaining new RL for thread-leader\n");
+	if (syscall(__NR_get_robust_list, __gettid(), &head_new, &len_new)) {
+		fail("__NR_get_robust_list failed");
+		exit(1);
+	}
+
+	if (head_orig != head_new || len_orig != len_new) {
+		fail("comparision failed");
+		exit(1);
+	}
+
 	pthread_join(thread, NULL);
 	if (args->result)
 		fail();