101 lines
3.3 KiB
Java
101 lines
3.3 KiB
Java
/*
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* Copyright (c) 2007, 2020, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/*
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* @test
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* @key stress gc randomness
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*
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* @summary converted from VM Testbase gc/gctests/WeakReference/weak007.
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* VM Testbase keywords: [gc, stress, stressopt, nonconcurrent]
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*
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* @library /vmTestbase
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* /test/lib
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* @run driver jdk.test.lib.FileInstaller . .
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* @run main/othervm -XX:-UseGCOverheadLimit gc.gctests.WeakReference.weak007.weak007 -t 1
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*/
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package gc.gctests.WeakReference.weak007;
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import nsk.share.TestFailure;
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import nsk.share.gc.*;
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import java.lang.ref.WeakReference;
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import java.lang.ref.Reference;
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/**
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* Test that GC correctly clears weak references.
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*
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* This test creates a number of weak references,
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* each of which points to the next, then provokes
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* GC with Algorithms.eatMemory(). The test succeeds
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* if last reference has been cleared and the object
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* has been finalized.
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*/
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public class weak007 extends ThreadedGCTest {
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class Worker implements Runnable {
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private int length = 10000;
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private int objectSize = 10000;
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private Reference[] references;
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private void makeReferences() {
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references[length - 1] = null;
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FinMemoryObject obj = new FinMemoryObject(objectSize);
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references[0] = new WeakReference(obj);
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for (int i = 1; i < length; ++i) {
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references[i] = new WeakReference(references[i - 1]);
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}
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for (int i = 0; i < length - 1; ++i) {
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references[i] = null;
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}
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}
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public void run() {
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makeReferences();
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Algorithms.eatMemory(getExecutionController());
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if (getExecutionController().continueExecution()) {
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if (references[length - 1].get() != null) {
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throw new TestFailure("Last weak reference has not been cleared");
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}
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} else {
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log.info("Completed iterations: " + getExecutionController().getIteration());
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}
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}
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public Worker() {
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log.info("Array size: " + length);
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log.info("Object size: " + objectSize);
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references = new WeakReference[length];
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}
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}
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@Override
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protected Runnable createRunnable(int i) {
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return new Worker();
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}
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public static void main(String[] args) {
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GC.runTest(new weak007(), args);
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}
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}
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