--- /dev/null	Fri Sep  9 14:16:11 2011
+++ new/agent/src/share/classes/sun/jvm/hotspot/ci/ciInstanceKlass.java	Fri Sep  9 14:16:32 2011
@@ -0,0 +1,83 @@
+/*
+ * Copyright (c) 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
+ * 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.ci;
+
+import java.io.*;
+import java.util.*;
+import sun.jvm.hotspot.debugger.*;
+import sun.jvm.hotspot.memory.SystemDictionary;
+import sun.jvm.hotspot.runtime.*;
+import sun.jvm.hotspot.oops.*;
+import sun.jvm.hotspot.types.Type;
+import sun.jvm.hotspot.types.TypeDataBase;
+import sun.jvm.hotspot.types.WrongTypeException;
+
+public class ciInstanceKlass extends ciKlass {
+  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("ciInstanceKlass");
+    initStateField = new CIntField(type.getCIntegerField("_init_state"), 0);
+    isSharedField = new CIntField(type.getCIntegerField("_is_shared"), 0);
+    CLASS_STATE_LINKED = db.lookupIntConstant("instanceKlass::linked").intValue();
+    CLASS_STATE_FULLY_INITIALIZED = db.lookupIntConstant("instanceKlass::fully_initialized").intValue();
+  }
+
+  private static CIntField initStateField;
+  private static CIntField isSharedField;
+  private static int CLASS_STATE_LINKED;
+  private static int CLASS_STATE_FULLY_INITIALIZED;
+
+  public ciInstanceKlass(Address addr) {
+    super(addr);
+  }
+
+  public int initState() {
+    int initState = (int)initStateField.getValue(getAddress());
+    if (isShared() && initState < CLASS_STATE_LINKED) {
+      InstanceKlass ik = (InstanceKlass)getOop();
+      initState = ik.getInitStateAsInt();
+    }
+    return initState;
+  }
+
+  public boolean isShared() {
+    return isSharedField.getValue(getAddress()) != 0;
+  }
+
+  public boolean isLinked() {
+    return initState() >= CLASS_STATE_LINKED;
+  }
+
+  public boolean isInitialized() {
+    return initState() == CLASS_STATE_FULLY_INITIALIZED;
+  }
+}