--- old/src/hotspot/share/runtime/vmOperations.hpp	2020-05-06 20:09:20.000000000 -0400
+++ new/src/hotspot/share/runtime/vmOperations.hpp	2020-05-06 20:09:20.000000000 -0400
@@ -420,6 +420,7 @@
     }
   }
   VMOp_Type type() const { return VMOp_Exit; }
+  bool doit_prologue();
   void doit();
 };