diff -r e28265130e4f -r b72c20cd583a jdk/src/share/classes/sun/misc/JavaNioAccess.java
--- a/jdk/src/share/classes/sun/misc/JavaNioAccess.java	Wed Aug 10 13:44:58 2011 -0700
+++ b/jdk/src/share/classes/sun/misc/JavaNioAccess.java	Thu Aug 11 12:40:24 2011 +0100
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2007, 2008, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2007, 2011, 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
@@ -25,6 +25,9 @@
 
 package sun.misc;
 
+import java.nio.Buffer;
+import java.nio.ByteBuffer;
+
 public interface JavaNioAccess {
     /**
      * Provides access to information on buffer usage.
@@ -36,4 +39,18 @@
         long getMemoryUsed();
     }
     BufferPool getDirectBufferPool();
+
+    /**
+     * Constructs a direct ByteBuffer referring to the block of memory starting
+     * at the given memory address and and extending {@code cap} bytes.
+     * The {@code ob} parameter is an arbitrary object that is attached
+     * to the resulting buffer.
+     */
+    ByteBuffer newDirectByteBuffer(long addr, int cap, Object ob);
+
+    /**
+     * Truncates a buffer by changing its capacity to 0.
+     */
+    void truncate(Buffer buf);
+
 }