--- a/src/hotspot/share/gc/shared/cardTableModRefBSForCTRS.hpp	Mon Feb 12 16:08:33 2018 -0800
+++ b/src/hotspot/share/gc/shared/cardTableModRefBSForCTRS.hpp	Wed Jan 10 22:48:27 2018 +0100
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2015, 2017, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2015, 2018, 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
@@ -43,6 +43,12 @@
 
   void set_CTRS(CardTableRS* rs) { _rs = rs; }
 
+  virtual bool card_mark_must_follow_store() const {
+    return UseConcMarkSweepGC;
+  }
+
+  virtual bool is_in_young(oop obj) const;
+
 private:
   CardTableRS* _rs;