| /* |
| * Copyright (c) 2011, 2018, 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. |
| */ |
| |
| /* |
| * @test |
| * @key stress gc |
| * |
| * @summary converted from VM Testbase gc/gctests/OneeFinalizerTest. |
| * VM Testbase keywords: [gc, stress, stressopt, nonconcurrent, jrockit] |
| * VM Testbase readme: |
| * DESCRIPTION |
| * Regression test that verifies that only one finalizer gets called. |
| * |
| * COMMENTS |
| * This test was ported from JRockit test suite. |
| * |
| * @library /vmTestbase |
| * /test/lib |
| * @run driver jdk.test.lib.FileInstaller . . |
| * @run main/othervm |
| * -XX:-UseGCOverheadLimit |
| * -Xlog:gc:gc.log |
| * gc.gctests.OneeFinalizerTest.OneeFinalizerTest |
| */ |
| |
| package gc.gctests.OneeFinalizerTest; |
| |
| import nsk.share.TestFailure; |
| import nsk.share.gc.GC; |
| import nsk.share.gc.GCTestBase; |
| import nsk.share.gc.gp.GarbageUtils; |
| import nsk.share.test.Stresser; |
| |
| /** |
| * Test that verifies that finalize() method is invoking only once. |
| */ |
| public class OneeFinalizerTest extends GCTestBase { |
| |
| private GlobalSafeCounter[] finalizerCounters = null; |
| |
| /** |
| * Helper class used for counting number of calls to finalizers. |
| */ |
| protected class GlobalSafeCounter { |
| |
| private int counter; |
| |
| /** |
| * Constructor that inits the global counter to 0. |
| */ |
| protected GlobalSafeCounter() { |
| counter = 0; |
| } |
| |
| /** |
| * Reset the global counter to 0. |
| */ |
| protected final void resetCounter() { |
| synchronized (this) { |
| counter = 0; |
| } |
| } |
| |
| /** |
| * Increase the global counter by 1. |
| */ |
| protected final void increaseCounter() { |
| synchronized (this) { |
| counter++; |
| } |
| } |
| |
| /** |
| * Retrieve the global counter value. |
| * |
| * @return value of the global counter |
| */ |
| protected final int getCounterValue() { |
| int value; |
| |
| synchronized (this) { |
| value = counter; |
| } |
| |
| return value; |
| } |
| } |
| |
| /** |
| * Helper class the implements finalize(), and that increments |
| * the global counters for each finalize() invokation. |
| */ |
| protected class FinalizedObject { |
| |
| private final int counterIndex; |
| |
| /** |
| * Constructor for the helper object which implements finalize(). |
| * |
| * @param index Index for the counter in the global array, that |
| * corresponds to this object. |
| */ |
| protected FinalizedObject(int index) { |
| counterIndex = index; |
| } |
| |
| /** |
| * Increases the global counter for this object when finalize() |
| * gets called (to make sure each finalizer gets called onee). |
| */ |
| @Override |
| protected final void finalize() { |
| finalizerCounters[counterIndex].increaseCounter(); |
| } |
| } |
| |
| private void initOneeFinalizerTest(int numberOfObjects) { |
| // NOTE: Set to null in case it's been used before (to prevent OOM) |
| finalizerCounters = null; |
| finalizerCounters = new GlobalSafeCounter[numberOfObjects]; |
| |
| for (int i = 0; i < numberOfObjects; i++) { |
| finalizerCounters[i] = new GlobalSafeCounter(); |
| } |
| } |
| |
| /** |
| * Tests that the finalize() method on each FinalizedObject instance |
| * has been called exactly one time. |
| */ |
| @Override |
| public void run() { |
| |
| |
| int numberOfObjects = 2000; |
| |
| initOneeFinalizerTest(numberOfObjects); |
| |
| FinalizedObject[] testObjects = new FinalizedObject[numberOfObjects]; |
| |
| // creates garbage |
| for (int i = 0; i < numberOfObjects; i++) { |
| testObjects[i] = new FinalizedObject(i); |
| } |
| |
| if (testObjects[0].hashCode() == 212_85_06) { |
| System.out.println("Bingo!!!"); |
| } |
| |
| testObjects = null; |
| |
| Stresser stresser = new Stresser(runParams.getStressOptions()); |
| stresser.start(0); |
| /* force finalization */ |
| GarbageUtils.eatMemory(stresser); |
| if (!stresser.continueExecution()) { |
| // may be we didn't eat all memory and didn't provoke GC |
| System.out.println("Passed without check"); |
| return; |
| } |
| System.gc(); |
| System.runFinalization(); |
| System.gc(); |
| System.runFinalization(); |
| System.gc(); |
| |
| int numberOfFinalizersRunMoreThanOnce = 0; |
| int numberOfFinalizersNotRun = 0; |
| |
| for (int i = 0; i < numberOfObjects; i++) { |
| int counter = finalizerCounters[i].getCounterValue(); |
| if (counter > 1) { |
| numberOfFinalizersRunMoreThanOnce++; |
| System.err.println("Object #" + i + " counter = " + counter); |
| } else if (counter == 0) { |
| System.err.println("WARNING: Finalizer not run for object #" + i); |
| numberOfFinalizersNotRun++; |
| } |
| } |
| |
| if (numberOfFinalizersNotRun > 0) { |
| System.err.println("WARNING: " + numberOfFinalizersNotRun + " finalizers not run"); |
| } |
| |
| if (numberOfFinalizersRunMoreThanOnce != 0) { |
| throw new TestFailure("OneeFinalizerTest failed. " + numberOfFinalizersRunMoreThanOnce + " errors"); |
| } |
| System.out.println("Test passed."); |
| } |
| |
| public static void main(String[] args) { |
| GC.runTest(new OneeFinalizerTest(), args); |
| } |
| } |