--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/hotspot/test/runtime/modules/ModuleStress/src/jdk.test/test/MainGC.java	Tue Jun 28 10:11:01 2016 -0400
@@ -0,0 +1,114 @@
+/*
+ * 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 test;
+
+import java.lang.module.Configuration;
+import java.lang.module.ModuleFinder;
+import java.lang.reflect.Layer;
+import java.lang.reflect.Method;
+import java.lang.reflect.Module;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import java.util.*;
+import java.util.concurrent.Callable;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
+import java.util.concurrent.Future;
+
+public class MainGC {
+
+    private static final Path MODS_DIR = Paths.get(System.getProperty("jdk.module.path"));
+    static final String MODULE_NAME = "jdk.translet";
+
+    public static void main(String[] args) throws Exception {
+
+        ModuleFinder finder = ModuleFinder.of(MODS_DIR);
+        Layer layerBoot = Layer.boot();
+
+        Configuration cf = layerBoot
+                .configuration()
+                .resolveRequires(ModuleFinder.of(), finder, Set.of(MODULE_NAME));
+
+        Module testModule = MainGC.class.getModule();
+        ClassLoader scl = ClassLoader.getSystemClassLoader();
+
+        // Create an unique module/class loader in a layer above the boot layer.
+        // Export this module to the jdk.test/test package.
+        // Add a read edge from module jdk.test to this module.
+        Callable<Void> task = new Callable<Void>() {
+            @Override
+            public Void call() throws Exception {
+                Layer layer = Layer.boot().defineModulesWithOneLoader(cf, scl);
+                Module transletModule = layer.findModule(MODULE_NAME).get();
+                testModule.addExports("test", transletModule);
+                testModule.addReads(transletModule);
+                Class<?> c = layer.findLoader(MODULE_NAME).loadClass("translet.MainGC");
+                Method method = c.getDeclaredMethod("go");
+                method.invoke(null);
+                return null;
+            }
+        };
+
+        List<Future<Void>> results = new ArrayList<>();
+
+        // Repeatedly create the layer above stressing the exportation of
+        // package jdk.test/test to several different modules.
+        ExecutorService pool = Executors.newFixedThreadPool(Math.min(100, Runtime.getRuntime().availableProcessors()*10));
+        try {
+            for (int i = 0; i < 10000; i++) {
+                results.add(pool.submit(task));
+                // At specified intervals, force a GC. This provides an
+                // opportunity to verify that both the module jdk.test's reads
+                // and the package test's, which is defined to jdk.test, exports
+                // lists are being walked.
+                if (i == 3000 || i == 6000 || i == 9000) {
+                    System.gc();
+                }
+            }
+        } finally {
+            pool.shutdown();
+        }
+
+        int passed = 0;
+        int failed = 0;
+
+        // The failed state should be 0, the created modules in layers above the
+        // boot layer should be allowed access to the contents of the jdk.test/test
+        // package since that package was exported to the transletModule above.
+        for (Future<Void> result : results) {
+            try {
+                result.get();
+                passed++;
+            } catch (Throwable x) {
+                x.printStackTrace();
+                failed++;
+            }
+        }
+
+        System.out.println("passed: " + passed);
+        System.out.println("failed: " + failed);
+    }
+
+    public static void callback() { }
+}