--- a/graal/com.oracle.truffle.api/src/com/oracle/truffle/api/nodes/NodeUtil.java	Tue Aug 12 00:01:54 2014 +0200
+++ b/graal/com.oracle.truffle.api/src/com/oracle/truffle/api/nodes/NodeUtil.java	Tue Aug 12 00:08:19 2014 +0200
@@ -27,6 +27,7 @@
 import java.io.*;
 import java.lang.annotation.*;
 import java.lang.reflect.*;
+import java.security.*;
 import java.util.*;
 
 import sun.misc.*;
@@ -160,9 +161,13 @@
         private static final ClassValue<NodeClass> nodeClasses = new ClassValue<NodeClass>() {
             @SuppressWarnings("unchecked")
             @Override
-            protected NodeClass computeValue(Class<?> clazz) {
+            protected NodeClass computeValue(final Class<?> clazz) {
                 assert Node.class.isAssignableFrom(clazz);
-                return new NodeClass((Class<? extends Node>) clazz, unsafeFieldOffsetProvider);
+                return AccessController.doPrivileged(new PrivilegedAction<NodeClass>() {
+                    public NodeClass run() {
+                        return new NodeClass((Class<? extends Node>) clazz, unsafeFieldOffsetProvider);
+                    }
+                });
             }
         };