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 import org.testng.Assert; 26 27 import java.util.concurrent.TimeUnit; 28 import java.util.concurrent.locks.Condition; 29 import java.util.concurrent.locks.ReentrantLock; 30 31 import com.oracle.java.testlibrary.dcmd.CommandExecutor; 32 import com.oracle.java.testlibrary.dcmd.PidJcmdExecutor; 33 34 /* 35 * @test 36 * @summary 37 * @library /testlibrary 38 * @build com.oracle.java.testlibrary.* 39 * @build com.oracle.java.testlibrary.dcmd.* 40 * @run testng FinalizerInfoTest 41 */ 42 public class FinalizerInfoTest { 43 static ReentrantLock lock = new ReentrantLock(); 44 static volatile int wasInitialized = 0; 45 static volatile int wasTrapped = 0; 46 static final String cmd = "GC.finalizer_info"; 47 static final int objectsCount = 1000; 48 49 class MyObject { 50 public MyObject() { 51 // Make sure object allocation/deallocation is not optimized out 52 wasInitialized += 1; 53 } 54 55 protected void finalize() { 56 // Trap the object in a finalization queue 57 wasTrapped += 1; 58 lock.lock(); 59 } 60 } 61 62 public void run(CommandExecutor executor) { 63 lock.lock(); 64 for(int i = 0; i < objectsCount; ++i) { 65 new MyObject(); 66 } 67 while(wasInitialized != objectsCount); 68 System.out.println("Objects intialized: " + wasInitialized); 69 while(wasTrapped < 1) { 70 System.gc(); 71 } 72 executor.execute(cmd); 73 lock.unlock(); 74 } 75 76 @Test 77 public void pid() { 78 run(new PidJcmdExecutor()); 79 } 80 }