--- old/src/hotspot/share/interpreter/interpreterRuntime.hpp	2017-10-26 14:31:39.875992066 -0700
+++ new/src/hotspot/share/interpreter/interpreterRuntime.hpp	2017-10-26 14:31:39.035959877 -0700
@@ -77,10 +77,10 @@
       return _last_frame.interpreter_callee_receiver(signature);
     }
     BasicObjectLock* monitor_begin() const {
-      return _last_frame.interpreter_frame_monitor_end();
+      return _last_frame.interpreter_frame_monitor_begin();
     }
     BasicObjectLock* monitor_end() const {
-      return _last_frame.interpreter_frame_monitor_begin();
+      return _last_frame.interpreter_frame_monitor_end();
     }
     BasicObjectLock* next_monitor(BasicObjectLock* current) const {
       return _last_frame.next_monitor_in_interpreter_frame(current);