1 /* 2 * Copyright (c) 2015, 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 import org.testng.annotations.Test; 25 26 import java.util.concurrent.TimeUnit; 27 import java.util.concurrent.locks.Condition; 28 import java.util.concurrent.locks.ReentrantLock; 29 30 import com.oracle.java.testlibrary.dcmd.CommandExecutor; 31 import com.oracle.java.testlibrary.dcmd.JMXExecutor; 32 33 /* 34 * @test 35 * @library /testlibrary 36 * @build com.oracle.java.testlibrary.* 37 * @build com.oracle.java.testlibrary.dcmd.* 38 * @run testng RunFinalizationTest 39 */ 40 public class RunFinalizationTest { 41 static ReentrantLock lock = new ReentrantLock(); 42 static Condition cond = lock.newCondition(); 43 static volatile boolean wasFinalized = false; 44 static volatile boolean wasInitialized = false; 45 46 class MyObject { 47 public MyObject() { 48 /* Make sure object allocation/deallocation is not optimized out */ 49 wasInitialized = true; 50 } 51 52 protected void finalize() { 53 lock.lock(); 54 wasFinalized = true; 55 cond.signalAll(); 56 lock.unlock(); 57 } 58 } 59 60 public static MyObject o; 61 62 public void run(CommandExecutor executor) { 63 lock.lock(); 64 o = new MyObject(); 65 o = null; 66 System.gc(); 67 executor.execute("GC.run_finalization"); 68 69 int waited = 0; 70 int waitTime = 15; 71 72 try { 73 System.out.println("Waiting for signal from finalizer"); 74 75 while (!cond.await(waitTime, TimeUnit.SECONDS)) { 76 waited += waitTime; 77 System.out.println(String.format("Waited %d seconds", waited)); 78 } 79 80 System.out.println("Received signal"); 81 } catch (InterruptedException e) { 82 throw new RuntimeException("Test error: Interrupted while waiting for signal from finalizer", e); 83 } finally { 84 lock.unlock(); 85 } 86 87 if (!wasFinalized) { 88 throw new RuntimeException("Test failure: Object was not finalized"); 89 } 90 } 91 92 @Test 93 public void jmx() { 94 run(new JMXExecutor()); 95 } 96 }