--- a/graal/com.oracle.truffle.api/src/com/oracle/truffle/api/impl/DefaultTruffleRuntime.java	Wed Feb 11 18:00:29 2015 +0100
+++ b/graal/com.oracle.truffle.api/src/com/oracle/truffle/api/impl/DefaultTruffleRuntime.java	Thu Feb 12 03:42:51 2015 +0100
@@ -29,6 +29,7 @@
 import com.oracle.truffle.api.*;
 import com.oracle.truffle.api.frame.*;
 import com.oracle.truffle.api.nodes.*;
+import com.oracle.truffle.api.unsafe.*;
 
 /**
  * Default implementation of the Truffle runtime if the virtual machine does not provide a better
@@ -147,6 +148,9 @@
     }
 
     public <T> T getCapability(Class<T> capability) {
+        if (capability == UnsafeAccessFactory.class) {
+            return capability.cast(new UnsafeAccessFactoryImpl());
+        }
         return null;
     }
 

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/graal/com.oracle.truffle.api/src/com/oracle/truffle/api/impl/UnsafeAccessFactoryImpl.java	Thu Feb 12 03:42:51 2015 +0100
@@ -0,0 +1,112 @@
+/*
+ * Copyright (c) 2013, 2015, 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.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package com.oracle.truffle.api.impl;
+
+import sun.misc.*;
+
+import com.oracle.truffle.api.unsafe.*;
+
+final class UnsafeAccessFactoryImpl implements UnsafeAccessFactory {
+    public UnsafeAccess createUnsafeAccess(final Unsafe unsafe) {
+        return new UnsafeAccessImpl(unsafe);
+    }
+
+    private static final class UnsafeAccessImpl implements UnsafeAccess {
+        private final Unsafe unsafe;
+
+        private UnsafeAccessImpl(Unsafe unsafe) {
+            this.unsafe = unsafe;
+        }
+
+        @SuppressWarnings("unchecked")
+        public <T> T uncheckedCast(Object value, Class<T> type, boolean condition, boolean nonNull) {
+            return (T) value;
+        }
+
+        public void putShort(Object receiver, long offset, short value, Object locationIdentity) {
+            unsafe.putShort(receiver, offset, value);
+        }
+
+        public void putObject(Object receiver, long offset, Object value, Object locationIdentity) {
+            unsafe.putObject(receiver, offset, value);
+        }
+
+        public void putLong(Object receiver, long offset, long value, Object locationIdentity) {
+            unsafe.putLong(receiver, offset, value);
+        }
+
+        public void putInt(Object receiver, long offset, int value, Object locationIdentity) {
+            unsafe.putInt(receiver, offset, value);
+        }
+
+        public void putFloat(Object receiver, long offset, float value, Object locationIdentity) {
+            unsafe.putFloat(receiver, offset, value);
+        }
+
+        public void putDouble(Object receiver, long offset, double value, Object locationIdentity) {
+            unsafe.putDouble(receiver, offset, value);
+        }
+
+        public void putByte(Object receiver, long offset, byte value, Object locationIdentity) {
+            unsafe.putByte(receiver, offset, value);
+        }
+
+        public void putBoolean(Object receiver, long offset, boolean value, Object locationIdentity) {
+            unsafe.putBoolean(receiver, offset, value);
+        }
+
+        public short getShort(Object receiver, long offset, boolean condition, Object locationIdentity) {
+            return unsafe.getShort(receiver, offset);
+        }
+
+        public Object getObject(Object receiver, long offset, boolean condition, Object locationIdentity) {
+            return unsafe.getObject(receiver, offset);
+        }
+
+        public long getLong(Object receiver, long offset, boolean condition, Object locationIdentity) {
+            return unsafe.getLong(receiver, offset);
+        }
+
+        public int getInt(Object receiver, long offset, boolean condition, Object locationIdentity) {
+            return unsafe.getInt(receiver, offset);
+        }
+
+        public float getFloat(Object receiver, long offset, boolean condition, Object locationIdentity) {
+            return unsafe.getFloat(receiver, offset);
+        }
+
+        public double getDouble(Object receiver, long offset, boolean condition, Object locationIdentity) {
+            return unsafe.getDouble(receiver, offset);
+        }
+
+        public byte getByte(Object receiver, long offset, boolean condition, Object locationIdentity) {
+            return unsafe.getByte(receiver, offset);
+        }
+
+        public boolean getBoolean(Object receiver, long offset, boolean condition, Object locationIdentity) {
+            return unsafe.getBoolean(receiver, offset);
+        }
+    }
+}