--- old/src/share/vm/gc/g1/g1CollectedHeap.hpp	2017-03-09 23:56:50.940707623 -0500
+++ new/src/share/vm/gc/g1/g1CollectedHeap.hpp	2017-03-09 23:56:50.824701960 -0500
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2001, 2016, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2001, 2017, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -1434,6 +1434,11 @@
   // full GC.
   void verify(VerifyOption vo);
 
+  // WhiteBox testing support.
+  virtual bool supports_concurrent_phase_control() const;
+  virtual const char* const* concurrent_phases() const;
+  virtual bool request_concurrent_phase(const char* phase);
+
   // The methods below are here for convenience and dispatch the
   // appropriate method depending on value of the given VerifyOption
   // parameter. The values for that parameter, and their meanings,