provided code

src/tests/devices/alarm-one.c

@@ -0,0 +1,18 @@
+/* Tests timer_sleep(1), which should return shortly after called.
+   This test can expose a race-condition if the kernel attempts to unblock
+   the thread before it has been blocked.
+ */
+
+#include <stdio.h>
+#include "tests/devices/tests.h"
+#include "threads/malloc.h"
+#include "threads/synch.h"
+#include "threads/thread.h"
+#include "devices/timer.h"
+
+void
+test_alarm_one (void) 
+{
+  timer_sleep (1);
+  pass ();
+}