| /* |
| * Copyright (c) 2014, 2016, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| /** |
| * @test |
| * @key headful |
| * @bug 8040076 |
| * @summary AwtList not garbage collected |
| * @run main/othervm -Xmx100m AwtListGarbageCollectionTest |
| */ |
| |
| import java.awt.*; |
| import java.awt.event.WindowAdapter; |
| import java.awt.event.WindowEvent; |
| import java.lang.ref.WeakReference; |
| |
| public class AwtListGarbageCollectionTest { |
| public static void main(String[] args) { |
| Frame frame = new Frame("List leak test"); |
| try { |
| test(frame); |
| } finally { |
| frame.dispose(); |
| } |
| } |
| |
| private static void test(Frame frame) { |
| WeakReference<List> weakListRef = null; |
| try { |
| frame.setSize(300, 200); |
| frame.setVisible(true); |
| |
| List strongListRef = new List(); |
| frame.add(strongListRef); |
| strongListRef.setMultipleMode(true); |
| frame.remove(strongListRef); |
| weakListRef = new WeakReference<List>(strongListRef); |
| strongListRef = null; |
| |
| //make out of memory to force gc |
| String veryLongString = new String(new char[100]); |
| while (true) { |
| veryLongString += veryLongString; |
| } |
| } catch (OutOfMemoryError e) { |
| if (weakListRef == null) { |
| throw new RuntimeException("Weak list ref wasn't created"); |
| } else if (weakListRef.get() != null) { |
| throw new RuntimeException("List wasn't garbage collected"); |
| } |
| } |
| } |
| } |