84 lines
2.8 KiB
Java
84 lines
2.8 KiB
Java
/*
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* Copyright (c) 2014, 2023, 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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import java.awt.Frame;
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import java.awt.List;
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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 jdk.test.lib.util.ForceGC;
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/*
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* @test
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* @key headful
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* @bug 8040076
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* @summary AwtList not garbage collected
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* @library /test/lib/
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* @build jdk.test.lib.util.ForceGC
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* @run main/othervm -Xmx100m -Xlog:gc=debug AwtListGarbageCollectionTest
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*/
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public class AwtListGarbageCollectionTest {
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private static final long ENQUEUE_TIMEOUT = 50;
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public static void main(String[] args) throws InterruptedException {
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Frame frame = new Frame("List leak test");
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try {
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test(frame);
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} finally {
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frame.dispose();
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}
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}
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private static void test(Frame frame) {
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frame.setSize(300, 200);
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frame.setVisible(true);
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List strongListRef = new List();
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frame.add(strongListRef);
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strongListRef.setMultipleMode(true);
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frame.remove(strongListRef);
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final ReferenceQueue<List> referenceQueue = new ReferenceQueue<>();
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final PhantomReference<List> phantomListRef =
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new PhantomReference<>(strongListRef, referenceQueue);
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System.out.println("phantomListRef: " + phantomListRef);
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strongListRef = null; // Clear the strong reference
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System.out.println("Waiting for the reference to be cleared");
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if (!ForceGC.wait(() -> phantomListRef == remove(referenceQueue))) {
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throw new RuntimeException("List wasn't garbage collected");
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}
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}
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private static Reference<?> remove(ReferenceQueue<?> queue) {
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try {
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return queue.remove(ENQUEUE_TIMEOUT);
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} catch (InterruptedException e) {
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throw new RuntimeException(e);
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}
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}
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}
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