--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/agent/src/share/classes/sun/jvm/hotspot/opto/Block.java	Sun Sep 11 14:48:24 2011 -0700
@@ -0,0 +1,88 @@
+/*
+ * 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.opto;
+
+import java.util.*;
+import java.io.PrintStream;
+import sun.jvm.hotspot.debugger.*;
+import sun.jvm.hotspot.runtime.*;
+import sun.jvm.hotspot.oops.*;
+import sun.jvm.hotspot.types.*;
+
+public class Block 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("Block");
+    nodesField = type.getAddressField("_nodes");
+    succsField = type.getAddressField("_succs");
+    numSuccsField = new CIntField(type.getCIntegerField("_num_succs"), 0);
+    preOrderField = new CIntField(type.getCIntegerField("_pre_order"), 0);
+    domDepthField = new CIntField(type.getCIntegerField("_dom_depth"), 0);
+    idomField = type.getAddressField("_idom");
+    freqField = type.getJFloatField("_freq");
+  }
+
+  private static AddressField nodesField;
+  private static AddressField succsField;
+  private static CIntField numSuccsField;
+  private static CIntField preOrderField;
+  private static CIntField domDepthField;
+  private static AddressField idomField;
+  private static JFloatField freqField;
+
+  public Block(Address addr) {
+    super(addr);
+  }
+
+  public int preOrder() {
+    return (int)preOrderField.getValue(getAddress());
+  }
+
+  public float freq() {
+    return (float)freqField.getValue(getAddress());
+  }
+
+  public Node_List nodes() {
+    return new Node_List(getAddress().addOffsetTo(nodesField.getOffset()));
+  }
+
+  public void dump(PrintStream out) {
+    out.print("B" + preOrder());
+    out.print(" Freq: " + freq());
+    out.println();
+    Node_List nl = nodes();
+    int cnt = nl.size();
+    for( int i=0; i<cnt; i++ )
+      nl.at(i).dump(out);
+    out.print("\n");
+  }
+}