1 /* 2 * Copyright (c) 2005, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * 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 URL testClassesURL = new File(System.getProperty("test.classes")).toURI().toURL(); 54 ClassLoader loader = new URLClassLoader(new URL[] { testClassesURL } , 55 systemLoader.getParent()); 56 Class<? extends ObjectOutputStream> cl = 57 Class.forName(SubclassOfOOS.class.getName(), false, 58 loader).asSubclass(ObjectOutputStream.class); 59 60 Constructor<? extends ObjectOutputStream> cons = 61 cl.getConstructor(OutputStream.class); 62 63 OutputStream os = new ByteArrayOutputStream(); 64 ObjectOutputStream obj = cons.newInstance(os); 65 66 final ReferenceQueue<Class<?>> queue = new ReferenceQueue<Class<?>>(); 67 WeakReference<Class<?>> ref = new WeakReference<Class<?>>(cl, queue); 68 69 cl = null; 70 obj = null; 71 loader = null; 72 cons = null; 73 systemLoader = null; 74 75 System.err.println("\nStart Garbage Collection right now"); 76 System.gc(); 77 78 Reference<? extends Class<?>> dequeued = queue.remove(TIMEOUT); 79 if (dequeued == ref) { 80 System.err.println("\nTEST PASSED"); 81 } else { 82 throw new Error(); 83 } 84 } 85 }