J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 2005 Sun Microsystems, Inc. All Rights Reserved. |
| 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 | * |
| 5 | * This code is free software; you can redistribute it and/or modify it |
| 6 | * under the terms of the GNU General Public License version 2 only, as |
| 7 | * published by the Free Software Foundation. |
| 8 | * |
| 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
| 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| 12 | * version 2 for more details (a copy is included in the LICENSE file that |
| 13 | * accompanied this code). |
| 14 | * |
| 15 | * You should have received a copy of the GNU General Public License version |
| 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
| 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| 18 | * |
| 19 | * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| 20 | * CA 95054 USA or visit www.sun.com if you need additional information or |
| 21 | * have any questions. |
| 22 | */ |
| 23 | |
| 24 | /* @test |
| 25 | * @bug 6232010 |
| 26 | * @summary this test checks that replacing SoftCache class with ConcurrentMap |
| 27 | * in ObjectInputStream/ObjectOutputStream gives an opportunity to |
| 28 | * classes which are inherited from OIS and OOS and loaded through |
| 29 | * separete ClassLoaders be available for garbage collection |
| 30 | * |
| 31 | * @author Andrey Ozerov |
| 32 | * @run main/othervm/policy=security.policy SubclassGC |
| 33 | */ |
| 34 | |
| 35 | import java.io.*; |
| 36 | import java.lang.ref.Reference; |
| 37 | import java.lang.ref.ReferenceQueue; |
| 38 | import java.lang.ref.WeakReference; |
| 39 | import java.lang.reflect.Constructor; |
| 40 | import java.net.URL; |
| 41 | import java.net.URLClassLoader; |
| 42 | |
| 43 | public class SubclassGC { |
| 44 | private static final long TIMEOUT = 1000; |
| 45 | |
| 46 | public static final void main(String[] args) throws Exception { |
| 47 | System.err.println("\n Regression test for bug 6232010\n"); |
| 48 | if (System.getSecurityManager() == null) { |
| 49 | System.setSecurityManager(new SecurityManager()); |
| 50 | } |
| 51 | |
| 52 | ClassLoader systemLoader = ClassLoader.getSystemClassLoader(); |
| 53 | ClassLoader loader = new URLClassLoader(((URLClassLoader) systemLoader).getURLs(), |
| 54 | systemLoader.getParent()); |
| 55 | Class<? extends ObjectOutputStream> cl = |
| 56 | Class.forName(SubclassOfOOS.class.getName(), false, |
| 57 | loader).asSubclass(ObjectOutputStream.class); |
| 58 | |
| 59 | Constructor<? extends ObjectOutputStream> cons = |
| 60 | cl.getConstructor(OutputStream.class); |
| 61 | |
| 62 | OutputStream os = new ByteArrayOutputStream(); |
| 63 | ObjectOutputStream obj = cons.newInstance(os); |
| 64 | |
| 65 | final ReferenceQueue<Class<?>> queue = new ReferenceQueue<Class<?>>(); |
| 66 | WeakReference<Class<?>> ref = new WeakReference<Class<?>>(cl, queue); |
| 67 | |
| 68 | cl = null; |
| 69 | obj = null; |
| 70 | loader = null; |
| 71 | cons = null; |
| 72 | systemLoader = null; |
| 73 | |
| 74 | System.err.println("\nStart Garbage Collection right now"); |
| 75 | System.gc(); |
| 76 | |
| 77 | Reference<? extends Class<?>> dequeued = queue.remove(TIMEOUT); |
| 78 | if (dequeued == ref) { |
| 79 | System.err.println("\nTEST PASSED"); |
| 80 | } else { |
| 81 | throw new Error(); |
| 82 | } |
| 83 | } |
| 84 | } |