src/share/vm/memory/iterator.hpp

rev 12851 : 8138737: Remove oop_ms_adjust_pointers and use oop_iterate instead
Reviewed-by:
rev 12852 : [mq]: 8138737-remove-oop-ms-adjust-kbarrett-rev1
rev 12853 : [mq]: 8138737-remove-oop-ms-adjust-stefank-rev1

@@ -1,7 +1,7 @@
 /*
- * Copyright (c) 1997, 2016, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1997, 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
  * under the terms of the GNU General Public License version 2 only, as
  * published by the Free Software Foundation.

@@ -63,10 +63,20 @@
   void set_ref_processor_internal(ReferenceProcessor* rp) { _ref_processor = rp; }
 
  public:
   ReferenceProcessor* ref_processor() const { return _ref_processor; }
 
+  // Iteration of InstanceRefKlasses differ depending on the closure,
+  // the below enum describes the different alternatives.
+  enum ReferenceIterationMode {
+    DO_DISCOVERY, // Apply closure and discover references
+    DO_FIELDS     // Apply closure to all fields
+  };
+
+  // The default iteration mode is to do discovery.
+  virtual ReferenceIterationMode reference_iteration_mode() { return DO_DISCOVERY; }
+
   // If the do_metadata functions return "true",
   // we invoke the following when running oop_iterate():
   //
   // 1) do_klass on the header klass pointer.
   // 2) do_klass on the klass pointer in the mirrors.