--- /dev/null 2015-05-12 15:41:00.858978672 +0300 +++ new/test/serviceability/dcmd/gc/FinalizerInfoTest.java 2015-05-12 19:27:41.981345734 +0300 @@ -0,0 +1,80 @@ +/* + * Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved. + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. + * + * This code is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 only, as + * published by the Free Software Foundation. + * + * This code is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License + * version 2 for more details (a copy is included in the LICENSE file that + * accompanied this code). + * + * You should have received a copy of the GNU General Public License version + * 2 along with this work; if not, write to the Free Software Foundation, + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. + * + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA + * or visit www.oracle.com if you need additional information or have any + * questions. + */ + +import org.testng.annotations.Test; +import org.testng.Assert; + +import java.util.concurrent.TimeUnit; +import java.util.concurrent.locks.Condition; +import java.util.concurrent.locks.ReentrantLock; + +import com.oracle.java.testlibrary.dcmd.CommandExecutor; +import com.oracle.java.testlibrary.dcmd.PidJcmdExecutor; + +/* + * @test + * @summary + * @library /testlibrary + * @build com.oracle.java.testlibrary.* + * @build com.oracle.java.testlibrary.dcmd.* + * @run testng FinalizerInfoTest + */ +public class FinalizerInfoTest { + static ReentrantLock lock = new ReentrantLock(); + static volatile int wasInitialized = 0; + static volatile int wasTrapped = 0; + static final String cmd = "GC.finalizer_info"; + static final int objectsCount = 1000; + + class MyObject { + public MyObject() { + // Make sure object allocation/deallocation is not optimized out + wasInitialized += 1; + } + + protected void finalize() { + // Trap the object in a finalization queue + wasTrapped += 1; + lock.lock(); + } + } + + public void run(CommandExecutor executor) { + lock.lock(); + for(int i = 0; i < objectsCount; ++i) { + new MyObject(); + } + while(wasInitialized != objectsCount); + System.out.println("Objects intialized: " + wasInitialized); + while(wasTrapped < 1) { + System.gc(); + } + executor.execute(cmd); + lock.unlock(); + } + + @Test + public void pid() { + run(new PidJcmdExecutor()); + } +}