--- /dev/null	2019-12-04 18:44:18.020007537 +0000
+++ new/src/jdk.incubator.foreign/share/classes/jdk/incubator/foreign/unsafe/ForeignUnsafe.java	2019-12-09 18:15:37.304133240 +0000
@@ -0,0 +1,68 @@
+/*
+ *  Copyright (c) 2019, 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 jdk.incubator.foreign.unsafe;
+
+import jdk.incubator.foreign.MemoryAddress;
+import jdk.internal.foreign.MemoryAddressImpl;
+
+/**
+ * Unsafe methods to allow interop between sun.misc.unsafe and memory access API.
+ */
+public final class ForeignUnsafe {
+
+    private ForeignUnsafe() {
+        //just the one, please
+    }
+
+    // The following methods can be used in conjunction with the java.foreign API.
+
+    /**
+     * Obtain the base object (if any) associated with this address. This can be used in conjunction with
+     * {@link #getUnsafeOffset(MemoryAddress)} in order to obtain a base/offset addressing coordinate pair
+     * to be used with methods like {@link sun.misc.Unsafe#getInt(Object, long)} and the likes.
+     *
+     * @param address the address whose base object is to be obtained.
+     * @return the base object associated with the address, or {@code null}.
+     */
+    public static Object getUnsafeBase(MemoryAddress address) {
+        return ((MemoryAddressImpl)address).unsafeGetBase();
+    }
+
+    /**
+     * Obtain the offset associated with this address. If {@link #getUnsafeBase(MemoryAddress)} returns {@code null} on the passed
+     * address, then the offset is to be interpreted as the (absolute) numerical value associated said address.
+     * Alternatively, the offset represents the displacement of a field or an array element within the containing
+     * base object. This can be used in conjunction with {@link #getUnsafeBase(MemoryAddress)} in order to obtain a base/offset
+     * addressing coordinate pair to be used with methods like {@link sun.misc.Unsafe#getInt(Object, long)} and the likes.
+     *
+     * @param address the address whose offset is to be obtained.
+     * @return the offset associated with the address.
+     */
+    public static long getUnsafeOffset(MemoryAddress address) {
+        return ((MemoryAddressImpl)address).unsafeGetOffset();
+    }
+}