Java 7 Application freeze at sun.lwawt.macosx.CCursorManager.nativeGetCursorPosition

Viral Barot vbarot at tibco.com
Mon Nov 25 06:53:59 PST 2013 

Hi Petr,
Here is the dump of the Appkit thread and the AWT Thread. As I indicated earlier our original application does not call invokeAndWait, it uses invokeLater to make changes to the frame once the frame is created in Appkit thread. Also I see this issue with SWT 3.7.2 as well as the latest 4.3.

"AWT-EventQueue-0" prio=5 tid=0x00007fcc9b357000 nid=0xbf03 runnable [0x0000000167cac000]
   java.lang.Thread.State: RUNNABLE
	at sun.lwawt.macosx.CCursorManager.nativeGetCursorPosition(Native Method)
	at sun.lwawt.macosx.CCursorManager.getCursorPosition(CCursorManager.java:54)
	at sun.lwawt.LWCursorManager.updateCursorImpl(LWCursorManager.java:79)
	at sun.lwawt.LWCursorManager.updateCursor(LWCursorManager.java:56)
	at sun.lwawt.LWComponentPeer.updateCursorImmediately(LWComponentPeer.java:852)
	at java.awt.Component.updateCursorImmediately(Component.java:3123)
	at java.awt.Component.hide(Component.java:1696)
	- locked <0x0000000158b7a4e0> (a java.awt.Component$AWTTreeLock)
	at java.awt.Window.hide(Window.java:1116)
	at sun.awt.EmbeddedFrame.hide(EmbeddedFrame.java:192)
	at java.awt.Component.show(Component.java:1653)
	at java.awt.Component.setVisible(Component.java:1603)
	at java.awt.Window.setVisible(Window.java:1014)
	at com.tibco.cep.studio.ui.overview.OverviewUtils.refreshOverview(OverviewUtils.java:122)
	at com.tibco.cep.studio.ui.overview.OverviewUtils$1.run(OverviewUtils.java:51)
	at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:251)
	at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:733)
	at java.awt.EventQueue.access$200(EventQueue.java:103)
	at java.awt.EventQueue$3.run(EventQueue.java:694)
	at java.awt.EventQueue$3.run(EventQueue.java:692)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
	at java.awt.EventQueue.dispatchEvent(EventQueue.java:703)
	at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:242)
	at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:161)
	at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:150)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:146)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:138)
	at java.awt.EventDispatchThread.run(EventDispatchThread.java:91)

   Locked ownable synchronizers:
	- None
 
"AppKit Thread" prio=5 tid=0x00007fcc9a803800 nid=0x707 waiting for monitor entry [0x00007fff58cb2000]
   java.lang.Thread.State: BLOCKED (on object monitor)
	at java.awt.Container.addImpl(Container.java:1077)
	- waiting to lock <0x0000000158b7a4e0> (a java.awt.Component$AWTTreeLock)
	at java.awt.Container.add(Container.java:966)
	at com.tomsawyer.canvas.swing.TSBaseSwingCanvas.setInnerCanvas(SourceFile:4258)
	at com.tomsawyer.interactive.swing.TSSwingCanvas.setInnerCanvas(SourceFile:798)
	at com.tomsawyer.canvas.swing.TSBaseSwingCanvas.createGUI(SourceFile:3870)
	at com.tomsawyer.canvas.swing.TSBaseSwingCanvas.<init>(SourceFile:138)
	at com.tomsawyer.interactive.swing.TSSwingCanvas.<init>(SourceFile:160)
	at com.tomsawyer.interactive.swing.TSSwingCanvas.<init>(SourceFile:138)
	at com.tibco.cep.diagramming.drawing.DrawingCanvas.<init>(DrawingCanvas.java:37)
	at com.tibco.cep.diagramming.drawing.DiagramManager.initialize(DiagramManager.java:233)
	at com.tibco.cep.diagramming.drawing.DiagramManager.<init>(DiagramManager.java:196)
	at com.tibco.cep.studio.ui.diagrams.EntityDiagramManager.<init>(EntityDiagramManager.java:135)
	at com.tibco.cep.studio.ui.diagrams.EventDiagramManager.<init>(EventDiagramManager.java:87)
	at com.tibco.cep.studio.ui.editors.events.EventDiagramEditor.getDiagramManager(EventDiagramEditor.java:24)
	at com.tibco.cep.studio.ui.editors.EntityDiagramEditor.addFormPage(EntityDiagramEditor.java:85)
	at com.tibco.cep.studio.ui.editors.EntityDiagramEditor.createUIEditorPage(EntityDiagramEditor.java:77)
	at com.tibco.cep.studio.ui.editors.EntityDiagramEditor.createPages(EntityDiagramEditor.java:54)
	at org.eclipse.ui.part.MultiPageEditorPart.createPartControl(MultiPageEditorPart.java:348)
	at org.eclipse.ui.internal.EditorReference.createPartHelper(EditorReference.java:670)
	at org.eclipse.ui.internal.EditorReference.createPart(EditorReference.java:465)
	at org.eclipse.ui.internal.WorkbenchPartReference.getPart(WorkbenchPartReference.java:595)
	at org.eclipse.ui.internal.PartPane.setVisible(PartPane.java:313)
	at org.eclipse.ui.internal.presentations.PresentablePart.setVisible(PresentablePart.java:180)
	at org.eclipse.ui.internal.presentations.util.PresentablePartFolder.select(PresentablePartFolder.java:270)
	at org.eclipse.ui.internal.presentations.util.LeftToRightTabOrder.select(LeftToRightTabOrder.java:65)
	at org.eclipse.ui.internal.presentations.util.TabbedStackPresentation.selectPart(TabbedStackPresentation.java:473)
	at org.eclipse.ui.internal.PartStack.refreshPresentationSelection(PartStack.java:1245)
	at org.eclipse.ui.internal.PartStack.setSelection(PartStack.java:1198)
	at org.eclipse.ui.internal.PartStack.presentationSelectionChanged(PartStack.java:834)
	at org.eclipse.ui.internal.PartStack.access$1(PartStack.java:823)
	at org.eclipse.ui.internal.PartStack$1.selectPart(PartStack.java:137)
	at org.eclipse.ui.internal.presentations.util.TabbedStackPresentation$1.handleEvent(TabbedStackPresentation.java:133)
	at org.eclipse.ui.internal.presentations.util.AbstractTabFolder.fireEvent(AbstractTabFolder.java:269)
	at org.eclipse.ui.internal.presentations.util.AbstractTabFolder.fireEvent(AbstractTabFolder.java:278)
	at org.eclipse.ui.internal.presentations.defaultpresentation.DefaultTabFolder.access$1(DefaultTabFolder.java:1)
	at org.eclipse.ui.internal.presentations.defaultpresentation.DefaultTabFolder$2.handleEvent(DefaultTabFolder.java:88)
	at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
	at org.eclipse.swt.widgets.Display.sendEvent(Display.java:4128)
	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1457)
	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1480)
	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1465)
	at org.eclipse.swt.widgets.Widget.notifyListeners(Widget.java:1270)
	at org.eclipse.swt.custom.CTabFolder.setSelection(CTabFolder.java:2746)
	at org.eclipse.swt.custom.CTabFolder.onMouse(CTabFolder.java:1433)
	at org.eclipse.swt.custom.CTabFolder$1.handleEvent(CTabFolder.java:257)
	at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
	at org.eclipse.swt.widgets.Display.sendEvent(Display.java:4128)
	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1457)
	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1480)
	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1465)
	at org.eclipse.swt.widgets.Widget.notifyListeners(Widget.java:1270)
	at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:3974)
	at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3613)
	at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:2701)
	at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2665)
	at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2499)
	at org.eclipse.ui.internal.Workbench$7.run(Workbench.java:679)
	at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
	at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:668)
	at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149)
	at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:123)
	at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:196)
	at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:110)
	at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:79)
	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:344)
	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:179)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:606)
	at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:622)
	at org.eclipse.equinox.launcher.Main.basicRun(Main.java:577)
	at org.eclipse.equinox.launcher.Main.run(Main.java:1410)
	at org.eclipse.equinox.launcher.Main.main(Main.java:1386)

   Locked ownable synchronizers:
	- None



On Nov 18, 2013, at 10:55 PM, Petr Pchelko <petr.pchelko at oracle.com> wrote:

> Hello, Viral.
> 
> It's known that there are some deadlocks in SWT_AWT bridge on Mac. Here's an example:
> https://bugs.openjdk.java.net/browse/JDK-8020165
> 
> It would be useful if you also post the dump of an Appkit thread to identify your particular case.
> 
> The deadlock occurs because AWT is called on the main thread. So the main thread get blocked
> on some internal AWT lock, while the EventDispatchThread is trying to perform a synchronous operation
> on the main thread. It's not quite obvious how to fix that internally, because for the normal AWT application
> we have a strict rule not to acquire locks on the Appkit thread. 
> 
> For now the workaround could be to wrap all the usages of AWT inside invokeLater (except the initial  
> SWT_AWT.new_Frame(composite) call). This should fix your deadlock. 
> 
> Also, which version of SWT are you using? The newer versions are patched so that you could not set the 
> embeddedFrameClass explicitly. That patch also contains additional changes in bridge initialization,
> so the bridge does not work quite well with older versions. This could be another reason of your deadlock.
> 
> With best regards. Petr.
> 
> On 19.11.2013, at 2:51, Viral Barot <vbarot at tibco.com> wrote:
> 
>> Accessing AWT frame from a thread causes the application to freeze when executed with JRE 7. The AWT frame is created with SWT_AWT bridge.
>> 
>> Below is the test case in which call to frame.setVisible(true); from the AWT event dispatching thread does not return.
>> 
>> Test Case:
>> import java.awt.Button;
>> import java.awt.Color;
>> import java.awt.event.ActionEvent;
>> import java.awt.event.ActionListener;
>> import java.lang.reflect.InvocationTargetException;
>> 
>> import javax.swing.JOptionPane;
>> import javax.swing.SwingUtilities;
>> 
>> import org.eclipse.swt.SWT;
>> import org.eclipse.swt.awt.SWT_AWT;
>> import org.eclipse.swt.layout.GridLayout;
>> import org.eclipse.swt.widgets.Display;
>> import org.eclipse.swt.widgets.Shell;
>> import org.eclipse.swt.widgets.Composite;
>> 
>> public class Main {
>> 
>> public static void main(String[] args) {
>> 
>> 
>> 
>> if(System.getProperty("os.name").toLowerCase().startsWith("mac")){
>> SWT_AWT.embeddedFrameClass = "sun.lwawt.macosx.CViewEmbeddedFrame";
>> }
>> 
>> 
>>   Display display = new Display();
>>   Shell shell = new Shell(display);
>>   shell.setText("Shell");
>>   shell.setSize(200, 200);
>>   shell.setBackground(Display.getDefault().getSystemColor(SWT.COLOR_BLUE));
>> 
>> 
>> 
>>   final Composite composite = new Composite(shell, SWT.EMBEDDED);
>>   GridLayout gridLayout = new GridLayout();
>>   gridLayout.numColumns = 1;
>>   composite.setLayout(gridLayout);
>>   composite.setSize(200,200);
>>   composite.setBackground(Display.getDefault().getSystemColor(SWT.COLOR_WHITE));
>> 
>> 
>> 
>>   final java.awt.Frame frame  = SWT_AWT.new_Frame(composite);
>> frame.setVisible(false);
>> frame.setBackground(Color.red);
>> frame.setSize(200, 200);
>>   Button button = new Button("Submit");
>>   button.addActionListener(new ActionListener() {
>> 
>> 
>> @Override
>> public void actionPerformed(ActionEvent e) {
>> 
>> 
>> JOptionPane.showMessageDialog(null, "Hello");
>> }
>> });
>>   frame.add(button);
>>   frame.doLayout();
>> 
>> 
>> 
>>   try {
>> SwingUtilities.invokeAndWait(new Runnable() {
>> 
>> 
>> @Override
>> public void run() {
>> frame.setVisible(true);
>> }
>> });
>> } catch (InterruptedException e1) {
>> e1.printStackTrace();
>> } catch (InvocationTargetException e1) {
>> e1.printStackTrace();
>> }
>>   shell.open();
>> 
>> 
>> 
>>   while (!shell.isDisposed()) {
>>     if (!display.readAndDispatch())
>>       display.sleep();
>>   }
>>   display.dispose();
>> 
>> 
>> 
>> }
>> }
>> 
>> Below is the thread dump for this.
>> 
>> "AWT-EventQueue-0" prio=5 tid=0x00007f8d0b087000 nid=0x8703 runnable [0x0000000195e40000]
>>  java.lang.Thread.State: RUNNABLE
>> at sun.lwawt.macosx.CCursorManager.nativeGetCursorPosition(Native Method)
>> at sun.lwawt.macosx.CCursorManager.getCursorPosition(CCursorManager.java:54)
>> at sun.lwawt.LWCursorManager.updateCursorImpl(LWCursorManager.java:79)
>> at sun.lwawt.LWCursorManager.updateCursor(LWCursorManager.java:56)
>> at sun.lwawt.LWComponentPeer.updateCursorImmediately(LWComponentPeer.java:852)
>> at java.awt.Component.updateCursorImmediately(Component.java:3123)
>> at java.awt.Component.show(Component.java:1626)
>> - locked <0x0000000160c5b8c8> (a java.awt.Component$AWTTreeLock)
>> at java.awt.Window.show(Window.java:1042)
>> at sun.awt.EmbeddedFrame.show(EmbeddedFrame.java:179)
>> at java.awt.Component.show(Component.java:1651)
>> at java.awt.Component.setVisible(Component.java:1603)
>> at java.awt.Window.setVisible(Window.java:1014)
>> at Main$2.run(Main.java:60)
>> at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:241)
>> at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:733)
>> at java.awt.EventQueue.access$200(EventQueue.java:103)
>> at java.awt.EventQueue$3.run(EventQueue.java:694)
>> at java.awt.EventQueue$3.run(EventQueue.java:692)
>> at java.security.AccessController.doPrivileged(Native Method)
>> at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
>> at java.awt.EventQueue.dispatchEvent(EventQueue.java:703)
>> at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:242)
>> at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:161)
>> at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:150)
>> at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:146)
>> at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:138)
>> at java.awt.EventDispatchThread.run(EventDispatchThread.java:91)
>> 
>>  Locked ownable synchronizers:
>> - None
>> 
>> While in the above test case if invokeLater is called instead of invokeAndWait, the test case runs fine. But in my application the invokeLater calls also freeze at same location.
>> 
>> This behavoir happens with SWT 3.7.2 as well as 4.3.
>> 
>> 
>> 
>> 
>

More information about the macosx-port-dev mailing list