--- old/src/hotspot/share/runtime/vmOperations.hpp	2020-02-03 17:42:49.000000000 -0500
+++ new/src/hotspot/share/runtime/vmOperations.hpp	2020-02-03 17:42:48.000000000 -0500
@@ -451,6 +451,7 @@
     }
   }
   VMOp_Type type() const { return VMOp_Exit; }
+  bool doit_prologue();
   void doit();
 };