--- Gnu-Mach/kern/mach_clock.c	2020/09/02 04:36:57	1.1.1.1
+++ Gnu-Mach/kern/mach_clock.c	2020/09/02 04:41:14	1.1.1.2
@@ -167,7 +167,7 @@ void clock_interrupt(usec, usermode, bas
 	    thread_quantum_update(my_cpu, thread, 1, state);
 	}
 
-#if 	MACH_SAMPLE
+#if 	MACH_PCSAMPLE
 	/*
 	 * Take a sample of pc for the user if required.
 	 * This had better be MP safe.  It might be interesting
@@ -369,6 +369,19 @@ void init_timeout()
 }
 
 /*
+ * Record a timestamp in STAMP. 
+ */
+void
+record_time_stamp (time_value_t *stamp)
+{
+	do {
+		stamp->seconds = mtime->seconds;
+		stamp->microseconds = mtime->microseconds;
+	} while (stamp->seconds != mtime->check_seconds);
+}
+
+
+/*
  * Read the time.
  */
 kern_return_t