109 lines
3.8 KiB
Java
109 lines
3.8 KiB
Java
/*
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* Copyright (c) 2020, 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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package gc;
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/* @test id=Shenandoah
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* @bug 8256517
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* @requires vm.gc.Shenandoah
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* @requires vm.gc != "null"
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* @library /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
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* -Xbootclasspath/a:.
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* -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI
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* gc.TestReferenceClearDuringReferenceProcessing
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*/
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/* @test id=Z
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* @bug 8256517
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* @requires vm.gc.Z
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* @library /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
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* -Xbootclasspath/a:.
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* -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI -XX:+UseZGC
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* gc.TestReferenceClearDuringReferenceProcessing
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*/
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import java.lang.ref.Reference;
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import java.lang.ref.ReferenceQueue;
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import java.lang.ref.WeakReference;
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import jdk.test.whitebox.WhiteBox;
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public class TestReferenceClearDuringReferenceProcessing {
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private static final WhiteBox WB = WhiteBox.getWhiteBox();
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private static Object testObject = new Object();
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private static final ReferenceQueue<Object> queue = new ReferenceQueue<Object>();
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private static final WeakReference<Object> ref = new WeakReference<Object>(testObject, queue);
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private static final long TIMEOUT = 10000; // 10sec in millis
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private static void test() {
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while (!WB.isObjectInOldGen(testObject) ||
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!WB.isObjectInOldGen(ref)) {
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WB.fullGC();
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}
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WB.concurrentGCAcquireControl();
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try {
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testObject = null;
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WB.concurrentGCRunTo(WB.AFTER_CONCURRENT_REFERENCE_PROCESSING_STARTED);
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if (!ref.refersTo(null)) {
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throw new RuntimeException("ref not apparently cleared");
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}
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ref.clear();
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WB.concurrentGCRunToIdle();
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Reference<? extends Object> enqueued = null;
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try {
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enqueued = queue.remove(TIMEOUT);
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} catch (InterruptedException e) {
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throw new RuntimeException("queue.remove interrupted");
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}
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if (enqueued == null) {
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throw new RuntimeException("ref not enqueued");
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} else if (enqueued != ref) {
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throw new RuntimeException("some other ref enqeueued");
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}
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} finally {
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WB.concurrentGCReleaseControl();
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}
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}
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public static void main(String[] args) {
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if (WB.supportsConcurrentGCBreakpoints()) {
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// Also requires concurrent reference processing, but we
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// don't have a predicate for that. For now,
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// use @requires and CLA to limit the applicable collectors.
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test();
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}
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}
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}
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