1 /*
   2  * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  */
  23 
  24 import java.awt.AWTException;
  25 import java.awt.FlowLayout;
  26 import java.awt.Robot;
  27 import java.lang.ref.Reference;
  28 import java.lang.ref.WeakReference;
  29 import java.util.ArrayList;
  30 import java.util.List;
  31 import java.util.logging.Level;
  32 import java.util.logging.Logger;
  33 import javax.swing.JButton;
  34 import javax.swing.JFrame;
  35 import javax.swing.JPanel;
  36 import javax.swing.SwingUtilities;
  37 import test.java.awt.regtesthelpers.Util;
  38 
  39 /*
  40  @test
  41  @key headful
  42  @bug 7079254
  43  @summary Toolkit eventListener leaks memory
  44  @library ../regtesthelpers
  45  @build Util
  46  @compile LWDispatcherMemoryLeakTest.java
  47  @run main/othervm -Xmx10M LWDispatcherMemoryLeakTest
  48  */
  49 public class LWDispatcherMemoryLeakTest {
  50 
  51     private static JFrame frame;
  52     private static WeakReference<JButton> button;
  53     private static WeakReference<JPanel> p;
  54 
  55     public static void init() throws Throwable {
  56         SwingUtilities.invokeAndWait(new Runnable() {
  57             @Override
  58             public void run() {
  59                 frame = new JFrame();
  60                 frame.setLayout(new FlowLayout());
  61                 button = new WeakReference<JButton>(new JButton("Text"));
  62                 p = new WeakReference<JPanel>(new JPanel(new FlowLayout()));
  63                 p.get().add(button.get());
  64                 frame.add(p.get());
  65 
  66                 frame.setBounds(500, 400, 200, 200);
  67                 frame.setVisible(true);
  68             }
  69         });
  70 
  71         Util.waitTillShown(button.get());
  72         Util.clickOnComp(button.get(), new Robot());
  73 
  74         SwingUtilities.invokeAndWait(new Runnable() {
  75             @Override
  76             public void run() {
  77                 frame.remove(p.get());
  78             }
  79         });
  80 
  81         Util.waitForIdle(null);
  82         assertGC();
  83     }
  84 
  85     public static void assertGC() throws Throwable {
  86         List<byte[]> alloc = new ArrayList<byte[]>();
  87         int size = 10 * 1024;
  88         while (true) {
  89             try {
  90                 alloc.add(new byte[size]);
  91             } catch (OutOfMemoryError err) {
  92                 break;
  93             }
  94         }
  95         alloc = null;
  96         if (button.get() != null) {
  97             throw new Exception("Test failed: JButton was not collected");
  98         }
  99     }
 100 
 101     public static void main(String args[]) throws Throwable {
 102         init();
 103     }
 104 }