--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/agent/src/share/classes/sun/jvm/hotspot/classfile/ClassLoaderData.java	Sat Sep 01 13:25:18 2012 -0400
@@ -0,0 +1,66 @@
+/*
+ * Copyright (c) 2012, 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.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ *
+ */
+
+package sun.jvm.hotspot.classfile;
+
+import java.io.PrintStream;
+import java.util.*;
+import sun.jvm.hotspot.debugger.*;
+import sun.jvm.hotspot.runtime.*;
+import sun.jvm.hotspot.oops.*;
+import sun.jvm.hotspot.types.*;
+
+public class ClassLoaderData extends VMObject {
+  static {
+    VM.registerVMInitializedObserver(new Observer() {
+        public void update(Observable o, Object data) {
+          initialize(VM.getVM().getTypeDataBase());
+        }
+      });
+  }
+
+  private static synchronized void initialize(TypeDataBase db) throws WrongTypeException {
+    Type type      = db.lookupType("ClassLoaderData");
+    classLoaderField = type.getOopField("_class_loader");
+    nextField = type.getAddressField("_next");
+  }
+
+  private static sun.jvm.hotspot.types.OopField classLoaderField;
+  private static AddressField nextField;
+
+  public ClassLoaderData(Address addr) {
+    super(addr);
+  }
+
+  public static ClassLoaderData instantiateWrapperFor(Address addr) {
+    if (addr == null) {
+      return null;
+    }
+    return new ClassLoaderData(addr);
+  }
+
+  public Oop getClassLoader() {
+    return VM.getVM().getObjectHeap().newOop(classLoaderField.getValue(getAddress()));
+  }
+}