| /* |
| * Copyright (c) 2016, 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. |
| */ |
| |
| /* |
| * @test |
| * @summary Ensure module information is cleaned when owning class loader unloads |
| * @modules java.base/jdk.internal.misc |
| * @library /test/lib .. |
| * @build sun.hotspot.WhiteBox |
| * @compile/module=java.base java/lang/ModuleHelper.java |
| * @run main ClassFileInstaller sun.hotspot.WhiteBox |
| * sun.hotspot.WhiteBox$WhiteBoxPermission |
| * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI -Xmx64m -Xmx64m LoadUnloadModuleStress 15000 |
| */ |
| |
| import java.lang.ref.WeakReference; |
| |
| import static jdk.test.lib.Asserts.*; |
| |
| public class LoadUnloadModuleStress { |
| private static long timeout; |
| private static long timeStamp; |
| |
| public static byte[] garbage; |
| public static volatile WeakReference<MyClassLoader> clweak; |
| |
| public static Object createModule() throws Throwable { |
| MyClassLoader cl = new MyClassLoader(); |
| Object module = ModuleHelper.ModuleObject("mymodule", cl, new String [] {"PackageA"}); |
| assertNotNull(module); |
| ModuleHelper.DefineModule(module, false, "9.0", "mymodule", new String[] { "PackageA" }); |
| clweak = new WeakReference<>(cl); |
| return module; |
| } |
| |
| public static void main(String args[]) throws Throwable { |
| timeout = Long.valueOf(args[0]); |
| timeStamp = System.currentTimeMillis(); |
| |
| while(System.currentTimeMillis() - timeStamp < timeout) { |
| WeakReference<Object> modweak = new WeakReference<>(createModule()); |
| |
| while(clweak.get() != null) { |
| garbage = new byte[8192]; |
| System.gc(); |
| } |
| assertNull(modweak.get()); |
| } |
| } |
| static class MyClassLoader extends ClassLoader { } |
| } |