WPF应用程序挂起在Windows 8触摸设备上

Question

我们有一个挂在Windows 8触摸设备上的WPF程序(.net 3.5 sp1).

我使用"托管堆栈资源管理器"来查看线程,在删除我们自己的线程后,这是唯一剩下的堆栈跟踪:

0. [Internal thisFrame, 'M-->U', MS.Win32.UnsafeNativeMethods::IntWaitForMultipleObjectsEx] (Source Unavailable)
1. MS.Win32.UnsafeNativeMethods.WaitForMultipleObjectsEx (Source Unavailable)
2. System.Windows.Threading.DispatcherSynchronizationContext.Wait (Source Unavailable)
3. System.Threading.SynchronizationContext.InvokeWaitMethodHelper (Source Unavailable)
4. System.Threading.WaitHandle.WaitOne (Source Unavailable)
5. System.Threading.WaitHandle.WaitOne (Source Unavailable)
6. System.Threading.WaitHandle.WaitOne (Source Unavailable)
7. System.Windows.Input.PenThreadWorker.WorkerGetTabletsInfo (Source Unavailable)
8. System.Windows.Input.TabletDeviceCollection.UpdateTablets (Source Unavailable)
9. System.Windows.Input.TabletDeviceCollection..ctor (Source Unavailable)
10. System.Windows.Input.StylusLogic.get_TabletDevices (Source Unavailable)
11. System.Windows.Input.StylusLogic.PreProcessInput (Source Unavailable)
12. System.Windows.Input.InputManager.ProcessStagingArea (Source Unavailable)
13. System.Windows.Input.InputManager.ProcessInput (Source Unavailable)
14. System.Windows.Input.InputProviderSite.ReportInput (Source Unavailable)
15. System.Windows.Interop.HwndMouseInputProvider.ReportInput (Source Unavailable)
16. System.Windows.Interop.HwndMouseInputProvider.PossiblyDeactivate (Source Unavailable)
17. System.Windows.Interop.HwndMouseInputProvider.Dispose (Source Unavailable)
18. System.Windows.Interop.HwndMouseInputProvider.FilterMessage (Source Unavailable)
19. System.Windows.Interop.HwndSource.InputFilterMessage (Source Unavailable)
20. MS.Win32.HwndWrapper.WndProc (Source Unavailable)
21. MS.Win32.HwndSubclass.DispatcherCallbackOperation (Source Unavailable)
22. System.Windows.Threading.ExceptionWrapper.InternalRealCall (Source Unavailable)
23. System.Windows.Threading.ExceptionWrapper.TryCatchWhen (Source Unavailable)
24. System.Windows.Threading.Dispatcher.WrappedInvoke (Source Unavailable)
25. System.Windows.Threading.Dispatcher.InvokeImpl (Source Unavailable)
26. System.Windows.Threading.Dispatcher.Invoke (Source Unavailable)
27. MS.Win32.HwndSubclass.SubclassWndProc (Source Unavailable)
28. [Internal thisFrame, 'M-->U', MS.Win32.UnsafeNativeMethods::IntDestroyWindow] (Source Unavailable)
29. MS.Win32.HwndWrapper.DestroyWindow (Source Unavailable)
30. MS.Win32.HwndWrapper.Dispose (Source Unavailable)
31. MS.Win32.HwndWrapper.Dispose (Source Unavailable)
32. System.Windows.Interop.HwndSource.Dispose (Source Unavailable)
33. System.Windows.Interop.HwndSource.WeakEventDispatcherShutdown.OnShutdownFinished (Source Unavailable)
34. System.Windows.Threading.Dispatcher.ShutdownImplInSecurityContext (Source Unavailable)
35. System.Threading.ExecutionContext.runTryCode (Source Unavailable)
36. System.Threading.ExecutionContext.RunInternal (Source Unavailable)
37. System.Threading.ExecutionContext.Run (Source Unavailable)
38. System.Windows.Threading.Dispatcher.ShutdownImpl (Source Unavailable)
39. System.Windows.Threading.Dispatcher.PushFrameImpl (Source Unavailable)
40. System.Windows.Threading.Dispatcher.PushFrame (Source Unavailable)
41. System.Windows.Threading.Dispatcher.Run (Source Unavailable)
42. System.Windows.Application.RunDispatcher (Source Unavailable)
43. System.Windows.Application.RunInternal (Source Unavailable)
44. System.Windows.Application.Run (Source Unavailable)
45. System.Windows.Application.Run (Source Unavailable)
46. MyProgram.App.Main (Source Unavailable)

我发现很少有其他类似问题的引用,包括Windows 8和触摸设备,但没有解决方案.其他地方使用的.Net框架是4.0.

除了为此问题编写解决方法之外,还有什么真正的解决方案吗？

Answer 1

它看起来像竞争条件，我们在 WPF 手写笔逻辑中发现了这一点。尝试在 WPF 应用程序启动之前执行此代码：（它们使用静态构造函数getTablets.DoneEvent.WaitOne();）

 private static void PreventPimcManagerDeadlock()
 {
     try
     {
         var presentationCoreAssembly = typeof(Timeline).Assembly;
         var unsafeNativeMethodsType = presentationCoreAssembly.GetType(
             "MS.Win32.Penimc.UnsafeNativeMethods", false, true);
         if (unsafeNativeMethodsType == null)
             return;

         var pimcManagerField = unsafeNativeMethodsType.GetField(
             "_pimcManager", BindingFlags.NonPublic | BindingFlags.Static);
         if (pimcManagerField == null)
             return;

         pimcManagerField.GetValue(null);
     }
     catch
     {
     }
 }