--- a/src/hotspot/share/gc/g1/g1CollectedHeap.hpp	Mon Apr 01 08:21:45 2019 -0700
+++ b/src/hotspot/share/gc/g1/g1CollectedHeap.hpp	Mon Apr 01 18:34:39 2019 +0200
@@ -1322,6 +1322,12 @@
   // Unregister the given nmethod from the G1 heap.
   virtual void unregister_nmethod(nmethod* nm);
 
+  // No nmethod flushing needed.
+  virtual void flush_nmethod(nmethod* nm) {}
+
+  // No nmethod verification implemented.
+  virtual void verify_nmethod(nmethod* nm) {}
+
   // Free up superfluous code root memory.
   void purge_code_root_memory();