8013563: Memory leak in JFrame on Linux

Reviewed-by: anthony, art

jdk/src/share/classes/java/awt/Window.java

@@ -226,6 +226,7 @@ public class Window extends Container implements Accessible {
     boolean     syncLWRequests = false;
     transient boolean beforeFirstShow = true;
     private transient boolean disposing = false;
+    transient WindowDisposerRecord disposerRecord = null;
 
     static final int OPENED = 0x01;
 
@@ -437,18 +438,28 @@ public class Window extends Container implements Accessible {
 
     transient Object anchor = new Object();
     static class WindowDisposerRecord implements sun.java2d.DisposerRecord {
-        final WeakReference<Window> owner;
+        WeakReference<Window> owner;
         final WeakReference<Window> weakThis;
         final WeakReference<AppContext> context;
+
         WindowDisposerRecord(AppContext context, Window victim) {
-            owner = new WeakReference<Window>(victim.getOwner());
             weakThis = victim.weakThis;
             this.context = new WeakReference<AppContext>(context);
         }
+
+        public void updateOwner() {
+            Window victim = weakThis.get();
+            owner = (victim == null)
+                    ? null
+                    : new WeakReference<Window>(victim.getOwner());
+        }
+
         public void dispose() {
-            Window parent = owner.get();
-            if (parent != null) {
-                parent.removeOwnedWindow(weakThis);
+            if (owner != null) {
+                Window parent = owner.get();
+                if (parent != null) {
+                    parent.removeOwnedWindow(weakThis);
+                }
             }
             AppContext ac = context.get();
             if (null != ac) {
@@ -502,6 +513,8 @@ public class Window extends Container implements Accessible {
         }
 
         modalExclusionType = Dialog.ModalExclusionType.NO_EXCLUDE;
+        disposerRecord = new WindowDisposerRecord(appContext, this);
+        sun.java2d.Disposer.addRecord(anchor, disposerRecord);
 
         SunToolkit.checkAndSetPolicy(this);
     }
@@ -619,9 +632,8 @@ public class Window extends Container implements Accessible {
             owner.addOwnedWindow(weakThis);
         }
 
-        // Fix for 6758673: this call is moved here from init(gc), because
         // WindowDisposerRecord requires a proper value of parent field.
-        Disposer.addRecord(anchor, new WindowDisposerRecord(appContext, this));
+        disposerRecord.updateOwner();
     }
 
     /**
@@ -2774,6 +2786,7 @@ public class Window extends Container implements Accessible {
     void connectOwnedWindow(Window child) {
         child.parent = this;
         addOwnedWindow(child.weakThis);
+        child.disposerRecord.updateOwner();
     }
 
     private void addToWindowList() {
@@ -2936,7 +2949,8 @@ public class Window extends Container implements Accessible {
         weakThis = new WeakReference<>(this);
 
         anchor = new Object();
-        sun.java2d.Disposer.addRecord(anchor, new WindowDisposerRecord(appContext, this));
+        disposerRecord = new WindowDisposerRecord(appContext, this);
+        sun.java2d.Disposer.addRecord(anchor, disposerRecord);
 
         addToWindowList();
         initGC(null);

jdk/test/java/awt/Window/WindowsLeak/WindowsLeak.java

@@ -0,0 +1,71 @@
+/*
+ * Copyright (c) 2013, 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
+ * @bug 8013563
+ * @summary Tests that windows are removed from windows list
+ * @run main/othervm -Xms32M -Xmx32M WindowsLeak
+*/
+
+import java.awt.*;
+import sun.awt.AppContext;
+
+import java.lang.ref.WeakReference;
+
+import java.util.Vector;
+
+public class WindowsLeak {
+
+    public static void main(String[] args) {
+        for (int i = 0; i < 100; i++)
+        {
+            Frame f = new Frame();
+            f.pack();
+            f.dispose();
+        }
+
+        Vector garbage = new Vector();
+        while (true)
+        {
+            try
+            {
+                garbage.add(new byte[1000]);
+            }
+            catch (OutOfMemoryError e)
+            {
+                break;
+            }
+        }
+        garbage = null;
+
+        Vector<WeakReference<Window>> windowList =
+                        (Vector<WeakReference<Window>>) AppContext.getAppContext().get(Window.class);
+
+        if (windowList != null && !windowList.isEmpty()) {
+            throw new RuntimeException("Test FAILED: Window list is not empty: " + windowList.size());
+        }
+
+        System.out.println("Test PASSED");
+    }
+}