103 lines
3.5 KiB
Java
103 lines
3.5 KiB
Java
/*
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* Copyright (c) 2007, 2022, 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 randomness
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*
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* @summary converted from VM Testbase gc/gctests/WeakReference/weak003.
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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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* @build jdk.test.whitebox.WhiteBox
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* @run driver jdk.test.lib.helpers.ClassFileInstaller jdk.test.whitebox.WhiteBox
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* @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI gc.gctests.WeakReference.weak003.weak003 -t 1
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*/
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package gc.gctests.WeakReference.weak003;
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import java.lang.ref.Reference;
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import jdk.test.whitebox.WhiteBox;
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import nsk.share.test.*;
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import nsk.share.gc.*;
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import java.lang.ref.WeakReference;
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/**
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* Test that GC clears weak references before throwing OOM.
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*
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* This test creates a number of weak references, then provokes
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* GC with WB.fullGC() and checks that all references
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* have been cleared.
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*
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* This assertion is not clearly stated in javadoc for WeakReference,
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* (but for SoftReference), but one would expect that quality GC
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* will do it.
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*/
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public class weak003 extends ThreadedGCTest {
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class Worker implements Runnable {
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private int arrayLength;
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private int objectSize = 100;
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private Reference<MemoryObject>[] references;
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public void run() {
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for (int i = 0; i < arrayLength; ++i) {
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references[i] = new WeakReference<MemoryObject>(new MemoryObject(LocalRandom.nextInt(objectSize)));
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}
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WhiteBox.getWhiteBox().fullGC();
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if (!getExecutionController().continueExecution()) {
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return;
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}
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// Check that all references have been cleared
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int n = 0;
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for (int i = 0; i < arrayLength; ++i) {
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if (references[i].get() != null) {
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++n;
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}
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}
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if (n != 0) {
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references = null;
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throw new RuntimeException("Some of the references have been not cleared: " + n);
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}
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}
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public void Worker() {
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arrayLength = Memory.getArrayLength(runParams.getTestMemory(), Memory.getReferenceSize() + objectSize);
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System.out.println("Array size: " + arrayLength);
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references = new WeakReference[arrayLength];
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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 weak003(), args);
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}
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}
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