106 lines
3.3 KiB
Java
106 lines
3.3 KiB
Java
/*
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* Copyright (c) 2008, 2016, 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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/*
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@test
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@key headful
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@bug 6758673
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@summary Tests that windows are removed from owner's child windows list
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@modules java.desktop/java.awt:open
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@author art: area=awt.toplevel
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@run main/othervm -mx128m OwnedWindowsLeak
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*/
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import java.awt.Frame;
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import java.awt.Window;
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import java.lang.ref.WeakReference;
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import java.lang.reflect.Field;
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import java.util.Vector;
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public class OwnedWindowsLeak
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{
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public static void main(String[] args)
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{
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Frame owner = new Frame("F");
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// First, create many windows
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Vector<WeakReference<Window>> children =
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new Vector<WeakReference<Window>>();
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for (int i = 0; i < 1000; i++)
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{
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Window child = new Window(owner);
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children.add(new WeakReference<Window>(child));
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}
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// Second, make sure all the memory is allocated
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Vector garbage = new Vector();
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while (true)
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{
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try
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{
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garbage.add(new byte[1000]);
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}
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catch (OutOfMemoryError e)
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{
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break;
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}
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}
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garbage = null;
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// Third, make sure all the weak references are null
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for (WeakReference<Window> ref : children)
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{
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if (ref.get() != null)
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{
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throw new RuntimeException("Test FAILED: some of child windows are not GCed");
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}
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}
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// Fourth, make sure owner's children list contains no elements
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try
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{
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Field f = Window.class.getDeclaredField("ownedWindowList");
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f.setAccessible(true);
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Vector ownersChildren = (Vector)f.get(owner);
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if (ownersChildren.size() > 0)
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{
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throw new RuntimeException("Test FAILED: some of the child windows are not removed from owner's children list");
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}
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}
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catch (NoSuchFieldException z)
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{
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System.out.println("Test PASSED: no 'ownedWindowList' field in Window class");
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return;
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}
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catch (Exception z)
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{
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throw new RuntimeException("Test FAILED: unexpected exception", z);
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}
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// Test passed
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System.out.println("Test PASSED");
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owner.dispose();
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}
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}
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