8161664: Memory leak in com.apple.laf.AquaProgressBarUI removed progress bar still referenced

Reviewed-by: serb, alexsch

src/macosx/classes/com/apple/laf/AquaProgressBarUI.java

@@ -124,7 +124,9 @@ public class AquaProgressBarUI extends ProgressBarUI implements ChangeListener,
             if (!progressBar.isIndeterminate()) return;
             stopAnimationTimer();
             // start the animation thread
-            startAnimationTimer();
+            if (progressBar.isDisplayable()) {
+              startAnimationTimer();
+            }
         }
 
         if ("JProgressBar.style".equals(prop)) {
@@ -141,7 +143,9 @@ public class AquaProgressBarUI extends ProgressBarUI implements ChangeListener,
 
     public void ancestorAdded(final AncestorEvent e) {
         if (!progressBar.isIndeterminate()) return;
-        startAnimationTimer();
+        if (progressBar.isDisplayable()) {
+          startAnimationTimer();
+        }
     }
 
     public void ancestorMoved(final AncestorEvent e) { }

test/javax/swing/JProgressBar/8161664/ProgressBarMemoryLeakTest.java

+/*
+ * Copyright (c) 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
+ * @bug 8161664
+ * @summary Memory leak in com.apple.laf.AquaProgressBarUI: removed progress bar still referenced
+ * @library ../../regtesthelpers
+ * @build Util
+ * @run main/timeout=300/othervm -Xmx16m ProgressBarMemoryLeakTest
+ */
+import java.awt.EventQueue;
+import java.lang.ref.WeakReference;
+
+import javax.swing.JFrame;
+import javax.swing.JPanel;
+import javax.swing.JProgressBar;
+import javax.swing.UIManager;
+import javax.swing.UnsupportedLookAndFeelException;
+
+public class ProgressBarMemoryLeakTest {
+
+  private static JFrame sFrame;
+  private static WeakReference<JProgressBar> sProgressBar;
+
+  public static void main(String[] args) throws Exception {
+    UIManager.LookAndFeelInfo[] installedLookAndFeels = UIManager.getInstalledLookAndFeels();
+    for ( UIManager.LookAndFeelInfo installedLookAndFeel : installedLookAndFeels ) {
+      executeTestCase(installedLookAndFeel.getClassName());
+    }
+  }
+
+  private static void executeTestCase(String lookAndFeelString) throws Exception{
+    if (tryLookAndFeel(lookAndFeelString)) {
+      EventQueue.invokeAndWait( new Runnable() {
+        @Override
+        public void run() {
+          showUI();
+        }
+      } );
+      EventQueue.invokeAndWait( new Runnable() {
+        @Override
+        public void run() {
+          disposeUI();
+        }
+      } );
+      Util.generateOOME();
+      JProgressBar progressBar = sProgressBar.get();
+      if ( progressBar != null ) {
+        throw new RuntimeException( "Progress bar (using L&F: " + lookAndFeelString + ") should have been GC-ed" );
+      }
+    }
+  }
+
+  private static void showUI(){
+    sFrame = new JFrame();
+
+    JProgressBar progressBar = new JProgressBar();
+    progressBar.setVisible(false);
+    progressBar.setIndeterminate(false);
+    progressBar.setIndeterminate(true);
+    progressBar.setIndeterminate(false);
+    progressBar.setValue(10);
+    progressBar.setString("Progress");
+
+    sFrame.add(progressBar);
+
+    sProgressBar = new WeakReference<>(progressBar);
+
+    sFrame.setSize(200,200);
+    sFrame.setVisible(true);
+  }
+
+  private static void disposeUI(){
+    sFrame.setContentPane(new JPanel());
+    sFrame.dispose();
+    sFrame = null;
+  }
+
+  private static boolean tryLookAndFeel(String lookAndFeelString) throws Exception {
+    try {
+      UIManager.setLookAndFeel(lookAndFeelString);
+    } catch (UnsupportedLookAndFeelException | ClassNotFoundException | InstantiationException | IllegalAccessException e) {
+      return false;
+    }
+    return true;
+  }
+}