--- a/src/share/vm/memory/cardTableModRefBS.hpp	Thu Oct 16 10:21:29 2014 +0200
+++ b/src/share/vm/memory/cardTableModRefBS.hpp	Wed Oct 15 16:02:50 2014 +0200
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2000, 2013, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2000, 2014, 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
@@ -155,7 +155,7 @@
     assert(_whole_heap.contains(p),
            err_msg("Attempt to access p = "PTR_FORMAT" out of bounds of "
                    " card marking array's _whole_heap = ["PTR_FORMAT","PTR_FORMAT")",
-                   p, _whole_heap.start(), _whole_heap.end()));
+                   p2i(p), p2i(_whole_heap.start()), p2i(_whole_heap.end())));
     jbyte* result = &byte_map_base[uintptr_t(p) >> card_shift];
     assert(result >= _byte_map && result < _byte_map + _byte_map_size,
            "out of bounds accessor for card marking array");
@@ -292,7 +292,7 @@
   // these functions here for performance.
 protected:
   void write_ref_field_work(oop obj, size_t offset, oop newVal);
-  virtual void write_ref_field_work(void* field, oop newVal);
+  virtual void write_ref_field_work(void* field, oop newVal, bool release = false);
 public:
 
   bool has_write_ref_array_opt() { return true; }
@@ -324,9 +324,14 @@
 
   template <class T> inline void inline_write_ref_field_pre(T* field, oop newVal) {}
 
-  template <class T> inline void inline_write_ref_field(T* field, oop newVal) {
+  template <class T> inline void inline_write_ref_field(T* field, oop newVal, bool release) {
     jbyte* byte = byte_for((void*)field);
-    *byte = dirty_card;
+    if (release) {
+      // Perform a releasing store if requested.
+      OrderAccess::release_store((volatile jbyte*) byte, dirty_card);
+    } else {
+      *byte = dirty_card;
+    }
   }
 
   // These are used by G1, when it uses the card table as a temporary data
@@ -426,7 +431,7 @@
     assert(_whole_heap.contains(result),
            err_msg("Returning result = "PTR_FORMAT" out of bounds of "
                    " card marking array's _whole_heap = ["PTR_FORMAT","PTR_FORMAT")",
-                   result, _whole_heap.start(), _whole_heap.end()));
+                   p2i(result), p2i(_whole_heap.start()), p2i(_whole_heap.end())));
     return result;
   }
 
@@ -435,7 +440,7 @@
     assert(_whole_heap.contains(p),
            err_msg("Attempt to access p = "PTR_FORMAT" out of bounds of "
                    " card marking array's _whole_heap = ["PTR_FORMAT","PTR_FORMAT")",
-                   p, _whole_heap.start(), _whole_heap.end()));
+                   p2i(p), p2i(_whole_heap.start()), p2i(_whole_heap.end())));
     return byte_for(p) - _byte_map;
   }