--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/hotspot/jtreg/compiler/graalunit/com.oracle.mxtool.junit/com/oracle/mxtool/junit/ModuleSupport.java	Wed Oct 09 10:59:45 2019 -0700
@@ -0,0 +1,71 @@
+/*
+ * 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.
+ *
+ * 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.mxtool.junit;
+
+import java.io.PrintStream;
+import java.util.Set;
+
+/**
+ * Interface to {@code java.lang.Module} related functionality.
+ */
+class ModuleSupport {
+
+    /**
+     * @param out stream to use for printing warnings
+     */
+    ModuleSupport(PrintStream out) {
+    }
+
+    /**
+     * Exports and opens packages based on {@code spec}. See further documentation in
+     * {@code mx_unittest.py}.
+     *
+     * @param spec
+     * @param context
+     * @param opened the set of opens performed are added to this set in the format
+     *            {@code <module>/<package>=<target-module>(,<target-module>)*} (e.g.
+     *            {@code "com.foo/com.foo.util=ALL-NAMED,com.bar"})
+     * @param exported the set of exports performed are added to this set in the format
+     *            {@code <module>/<package>=<target-module>(,<target-module>)*} (e.g.
+     *            {@code "com.foo/com.foo.util=ALL-NAMED,com.bar"})
+     */
+    void openPackages(String spec, Object context, Set<String> opened, Set<String> exported) {
+        // Nop on JDK 8
+    }
+
+    /**
+     * Updates modules specified in {@code AddExport} annotations on {@code classes} to export and
+     * open packages to the annotation classes' declaring modules.
+     *
+     * @param classes
+     * @param opened the set of opens performed are added to this set in the format
+     *            {@code <module>/<package>=<target-module>(,<target-module>)*} (e.g.
+     *            {@code "com.foo/com.foo.util=ALL-NAMED,com.bar"})
+     * @param exported the set of exports performed are added to this set in the format
+     *            {@code <module>/<package>=<target-module>(,<target-module>)*} (e.g.
+     *            {@code "com.foo/com.foo.util=ALL-NAMED,com.bar"})
+     */
+    void processAddExportsAnnotations(Set<Class<?>> classes, Set<String> opened, Set<String> exported) {
+        // Nop on JDK 8
+    }
+}