90 lines
3.0 KiB
Java
90 lines
3.0 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.shenandoah;
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/* @test id=satb-100
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* @requires vm.gc.Shenandoah
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* @library /test/lib
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* @build jdk.test.whitebox.WhiteBox
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* @modules java.base
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* @run main 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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* -XX:+UnlockExperimentalVMOptions -XX:+UseShenandoahGC -XX:ShenandoahGCMode=satb -XX:ShenandoahGarbageThreshold=100 -Xmx100m
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* gc.shenandoah.TestReferenceShortcutCycle
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*/
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import java.lang.ref.PhantomReference;
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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 TestReferenceShortcutCycle {
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private static final int NUM_ITEMS = 100000;
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private static final WhiteBox WB = WhiteBox.getWhiteBox();
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private static final class TestObject {
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public final int value;
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public TestObject(int value) {
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this.value = value;
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}
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}
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private static WeakReference[] refs;
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private static void setup() {
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refs = new WeakReference[NUM_ITEMS];
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for (int i = 0; i < NUM_ITEMS; i++) {
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refs[i] = new WeakReference<>(new TestObject(i));
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}
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}
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private static void fail(String msg) throws Exception {
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throw new RuntimeException(msg);
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}
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private static void testConcurrentCollection() throws Exception {
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setup();
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WB.concurrentGCAcquireControl();
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try {
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WB.concurrentGCRunToIdle();
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WB.concurrentGCRunTo(WB.AFTER_CONCURRENT_REFERENCE_PROCESSING_STARTED);
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for (int i = 0; i < NUM_ITEMS; i++) {
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if (refs[i].get() != null) {
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fail("resurrected referent");
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}
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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) throws Exception {
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testConcurrentCollection();
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}
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}
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