--- /dev/null	2017-04-21 12:15:41.000000000 +0200
+++ new/src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.serviceprovider/src/org/graalvm/compiler/serviceprovider/JDK9Method.java	2017-04-21 12:15:41.000000000 +0200
@@ -0,0 +1,148 @@
+/*
+ * Copyright (c) 2016, 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 org.graalvm.compiler.serviceprovider;
+
+import java.lang.reflect.InvocationTargetException;
+import java.lang.reflect.Method;
+import java.lang.reflect.Modifier;
+
+/**
+ * Reflection based access to API introduced by JDK 9. This allows the API to be used in code that
+ * must be compiled on a JDK prior to 9.
+ */
+public final class JDK9Method {
+
+    private static int getJavaSpecificationVersion() {
+        String value = System.getProperty("java.specification.version");
+        if (value.startsWith("1.")) {
+            value = value.substring(2);
+        }
+        return Integer.parseInt(value);
+    }
+
+    /**
+     * The integer value corresponding to the value of the {@code java.specification.version} system
+     * property after any leading {@code "1."} has been stripped.
+     */
+    public static final int JAVA_SPECIFICATION_VERSION = getJavaSpecificationVersion();
+
+    public JDK9Method(Class<?> declaringClass, String name, Class<?>... parameterTypes) {
+        try {
+            this.method = declaringClass.getMethod(name, parameterTypes);
+        } catch (Exception e) {
+            throw new InternalError(e);
+        }
+    }
+
+    /**
+     * Determines if the Java runtime is version 8 or earlier.
+     */
+    public static final boolean Java8OrEarlier = JAVA_SPECIFICATION_VERSION <= 8;
+
+    public final Method method;
+
+    public Class<?> getReturnType() {
+        return method.getReturnType();
+    }
+
+    /**
+     * {@code Class.getModule()}.
+     */
+    public static final JDK9Method getModule;
+
+    /**
+     * {@code java.lang.Module.getPackages()}.
+     */
+    public static final JDK9Method getPackages;
+
+    /**
+     * {@code java.lang.Module.getResourceAsStream(String)}.
+     */
+    public static final JDK9Method getResourceAsStream;
+
+    /**
+     * {@code java.lang.Module.addOpens(String, Module)}.
+     */
+    public static final JDK9Method addOpens;
+
+    /**
+     * {@code java.lang.Module.isOpen(String, Module)}.
+     */
+    public static final JDK9Method isOpenTo;
+
+    /**
+     * Invokes the static Module API method represented by this object.
+     */
+    @SuppressWarnings("unchecked")
+    public <T> T invokeStatic(Object... args) {
+        checkAvailability();
+        assert Modifier.isStatic(method.getModifiers());
+        try {
+            return (T) method.invoke(null, args);
+        } catch (IllegalAccessException | IllegalArgumentException | InvocationTargetException e) {
+            throw new InternalError(e);
+        }
+    }
+
+    /**
+     * Invokes the non-static Module API method represented by this object.
+     */
+    @SuppressWarnings("unchecked")
+    public <T> T invoke(Object receiver, Object... args) {
+        checkAvailability();
+        assert !Modifier.isStatic(method.getModifiers());
+        try {
+            return (T) method.invoke(receiver, args);
+        } catch (IllegalAccessException | IllegalArgumentException | InvocationTargetException e) {
+            throw new InternalError(e);
+        }
+    }
+
+    private void checkAvailability() throws InternalError {
+        if (method == null) {
+            throw new InternalError("Cannot use Module API on JDK " + JAVA_SPECIFICATION_VERSION);
+        }
+    }
+
+    static {
+        if (JAVA_SPECIFICATION_VERSION >= 9) {
+            getModule = new JDK9Method(Class.class, "getModule");
+            Class<?> moduleClass = getModule.getReturnType();
+            getPackages = new JDK9Method(moduleClass, "getPackages");
+            addOpens = new JDK9Method(moduleClass, "addOpens", String.class, moduleClass);
+            getResourceAsStream = new JDK9Method(moduleClass, "getResourceAsStream", String.class);
+            isOpenTo = new JDK9Method(moduleClass, "isOpen", String.class, moduleClass);
+        } else {
+            JDK9Method unavailable = new JDK9Method();
+            getModule = unavailable;
+            getPackages = unavailable;
+            addOpens = unavailable;
+            getResourceAsStream = unavailable;
+            isOpenTo = unavailable;
+        }
+    }
+
+    private JDK9Method() {
+        method = null;
+    }
+}