85 lines
3.5 KiB
Java
85 lines
3.5 KiB
Java
/*
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* Copyright (c) 2005, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/* @test
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* @bug 6232010
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* @summary this test checks that replacing SoftCache class with ConcurrentMap
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* in ObjectInputStream/ObjectOutputStream gives an opportunity to
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* classes which are inherited from OIS and OOS and loaded through
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* separete ClassLoaders be available for garbage collection
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*
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* @author Andrey Ozerov
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* @run main/othervm/policy=security.policy SubclassGC
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*/
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import java.io.*;
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import java.lang.ref.Reference;
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import java.lang.ref.ReferenceQueue;
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import java.lang.ref.WeakReference;
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import java.lang.reflect.Constructor;
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import java.net.URL;
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import java.net.URLClassLoader;
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public class SubclassGC {
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private static final long TIMEOUT = 1000;
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public static final void main(String[] args) throws Exception {
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System.err.println("\n Regression test for bug 6232010\n");
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if (System.getSecurityManager() == null) {
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System.setSecurityManager(new SecurityManager());
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}
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ClassLoader systemLoader = ClassLoader.getSystemClassLoader();
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ClassLoader loader = new URLClassLoader(((URLClassLoader) systemLoader).getURLs(),
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systemLoader.getParent());
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Class<? extends ObjectOutputStream> cl =
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Class.forName(SubclassOfOOS.class.getName(), false,
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loader).asSubclass(ObjectOutputStream.class);
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Constructor<? extends ObjectOutputStream> cons =
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cl.getConstructor(OutputStream.class);
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OutputStream os = new ByteArrayOutputStream();
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ObjectOutputStream obj = cons.newInstance(os);
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final ReferenceQueue<Class<?>> queue = new ReferenceQueue<Class<?>>();
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WeakReference<Class<?>> ref = new WeakReference<Class<?>>(cl, queue);
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cl = null;
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obj = null;
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loader = null;
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cons = null;
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systemLoader = null;
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System.err.println("\nStart Garbage Collection right now");
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System.gc();
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Reference<? extends Class<?>> dequeued = queue.remove(TIMEOUT);
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if (dequeued == ref) {
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System.err.println("\nTEST PASSED");
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} else {
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throw new Error();
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}
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}
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}
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