--- /dev/null	2017-04-21 12:15:41.000000000 +0200
+++ new/src/jdk.internal.vm.ci/share/classes/jdk.vm.ci.services/src/jdk/vm/ci/services/internal/ReflectionAccessJDK.java	2017-04-21 12:15:40.000000000 +0200
@@ -0,0 +1,91 @@
+/*
+ * Copyright (c) 2017, 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.services.internal;
+
+import java.lang.reflect.Method;
+import java.util.Set;
+
+import jdk.vm.ci.services.Services;
+
+/**
+ * Reflection based access to API introduced in JDK 9. This allows the API to be used in code that
+ * must be compiled (but not executed) on JDK 8.
+ */
+public final class ReflectionAccessJDK {
+
+    /**
+     * {@code Class.getModule()}.
+     */
+    private static final Method getModule;
+
+    /**
+     * {@code java.lang.Module.addOpens(String, Module)}.
+     */
+    private static final Method addOpens;
+
+    /**
+     * {@code java.lang.Module.getPackages(Module, String, Module)}.
+     */
+    private static final Method getPackages;
+
+    /**
+     * {@code java.lang.Module.isOpen(String, Module)}.
+     */
+    private static final Method isOpenTo;
+
+    /**
+     * Opens all JVMCI packages to the module of a given class.
+     *
+     * @param other all JVMCI packages will be opened to the module of this class
+     */
+    @SuppressWarnings("unchecked")
+    public static void openJVMCITo(Class<?> other) {
+        try {
+            Object jvmci = getModule.invoke(Services.class);
+            Object otherModule = getModule.invoke(other);
+            if (jvmci != otherModule) {
+                Set<String> packages = (Set<String>) getPackages.invoke(jvmci);
+                for (String pkg : packages) {
+                    boolean opened = (Boolean) isOpenTo.invoke(jvmci, pkg, otherModule);
+                    if (!opened) {
+                        addOpens.invoke(jvmci, pkg, otherModule);
+                    }
+                }
+            }
+        } catch (Exception e) {
+            throw new InternalError(e);
+        }
+    }
+
+    static {
+        try {
+            getModule = Class.class.getMethod("getModule");
+            Class<?> moduleClass = getModule.getReturnType();
+            getPackages = moduleClass.getMethod("getPackages");
+            isOpenTo = moduleClass.getMethod("isOpen", String.class, moduleClass);
+            addOpens = moduleClass.getDeclaredMethod("addOpens", String.class, moduleClass);
+        } catch (NoSuchMethodException | SecurityException e) {
+            throw new InternalError(e);
+        }
+    }
+}