diff -r f4edb0d9f109 -r 21d113ecbf6a hotspot/agent/src/share/classes/sun/jvm/hotspot/types/basic/BasicTypeDataBase.java
--- a/hotspot/agent/src/share/classes/sun/jvm/hotspot/types/basic/BasicTypeDataBase.java	Fri Apr 11 09:56:35 2008 -0400
+++ b/hotspot/agent/src/share/classes/sun/jvm/hotspot/types/basic/BasicTypeDataBase.java	Sun Apr 13 17:43:42 2008 -0400
@@ -27,6 +27,7 @@
 import java.util.*;
 import sun.jvm.hotspot.debugger.*;
 import sun.jvm.hotspot.types.*;
+import sun.jvm.hotspot.runtime.VM;
 
 /** <P> This is a basic implementation of the TypeDataBase interface.
     It allows an external type database builder to add types to be
@@ -146,7 +147,7 @@
   }
 
   public long getOopSize() {
-    return machDesc.getOopSize();
+    return VM.getVM().getOopSize();
   }
 
   public boolean addressTypeIsEqualToType(Address addr, Type type) {