--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/jvmci/jdk.vm.ci.meta/src/jdk/vm/ci/meta/MemoryAccessProvider.java	Thu Oct 08 17:28:41 2015 -0700
@@ -0,0 +1,60 @@
+/*
+ * Copyright (c) 2012, 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.
+ *
+ * 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.vm.ci.meta;
+
+/**
+ * Provides memory access operations for the target VM.
+ */
+public interface MemoryAccessProvider {
+
+    /**
+     * Reads a value of this kind using a base address and a displacement. No bounds checking or
+     * type checking is performed. Returns {@code null} if the value is not available at this point.
+     *
+     * @param base the base address from which the value is read.
+     * @param displacement the displacement within the object in bytes
+     * @return the read value encapsulated in a {@link JavaConstant} object, or {@code null} if the
+     *         value cannot be read.
+     */
+    JavaConstant readUnsafeConstant(JavaKind kind, JavaConstant base, long displacement);
+
+    /**
+     * Reads a primitive value using a base address and a displacement.
+     *
+     * @param kind the {@link JavaKind} of the returned {@link JavaConstant} object
+     * @param base the base address from which the value is read
+     * @param displacement the displacement within the object in bytes
+     * @param bits the number of bits to read from memory
+     * @return the read value encapsulated in a {@link JavaConstant} object of {@link JavaKind} kind
+     */
+    JavaConstant readPrimitiveConstant(JavaKind kind, Constant base, long displacement, int bits);
+
+    /**
+     * Reads a Java {@link Object} value using a base address and a displacement.
+     *
+     * @param base the base address from which the value is read
+     * @param displacement the displacement within the object in bytes
+     * @return the read value encapsulated in a {@link Constant} object
+     */
+    JavaConstant readObjectConstant(Constant base, long displacement);
+}