--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/agent/src/share/classes/sun/jvm/hotspot/runtime/VMObject.java	Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,72 @@
+/*
+ * Copyright 2000-2002 Sun Microsystems, Inc.  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.runtime;
+
+import sun.jvm.hotspot.debugger.*;
+import sun.jvm.hotspot.types.*;
+
+/** This is a base class for all VM runtime objects which wrap
+    Addresses. The rationale is that without this in place, every
+    class would have to implement equals() and hashCode() with
+    boilerplate code, a practice which is inherently error-prone. */
+
+public class VMObject {
+  protected Address addr;
+
+  /** All of the objects have this as their constructor's signature
+      anyway */
+  public VMObject(Address addr) {
+    this.addr = addr;
+  }
+
+  public String toString() {
+    return getClass().getName() + "@" + addr;
+  }
+
+  public boolean equals(Object arg) {
+    if (arg == null) {
+      return false;
+    }
+
+    if (!getClass().equals(arg.getClass())) {
+      return false;
+    }
+
+    VMObject obj = (VMObject) arg;
+    if (!addr.equals(obj.addr)) {
+      return false;
+    }
+
+    return true;
+  }
+
+  public int hashCode() {
+    return addr.hashCode();
+  }
+
+  public Address getAddress() {
+    return addr;
+  }
+}