【发布时间】:2012-01-10 06:45:21
【问题描述】:
我们的 Windows 窗体应用程序存在问题,由于堆栈跟踪表明发生在 ToolTip 控件中的 AccessViolationException 类型的未处理异常而终止。
错误发生在应用程序的不同时间,我们目前无法可靠地重现它。 在这个阶段,它只发生在 Windows 7 的生产环境中,并且只针对某些用户,而不是其他用户——即使在以类似方式使用该应用程序的用户中也是如此。 它似乎与机器相关,因此我们已经完成了诸如确保图形驱动程序是最新的操作。
在事件日志中,总是记录 2 个不同的错误,一个与我们的应用程序有关:
Application: <Application>.exe
Framework Version: v4.0.30319
Description: The process was terminated due to an unhandled exception.
Exception Info: System.AccessViolationException
Stack:
at System.Windows.Forms.UnsafeNativeMethods.CallWindowProc(IntPtr, IntPtr, Int32, IntPtr, IntPtr)
at System.Windows.Forms.NativeWindow.DefWndProc(System.Windows.Forms.Message ByRef)
at System.Windows.Forms.ToolTip.WndProc(System.Windows.Forms.Message ByRef)
at System.Windows.Forms.ToolTip+ToolTipNativeWindow.WndProc(System.Windows.Forms.Message ByRef)
at System.Windows.Forms.NativeWindow.Callback(IntPtr, Int32, IntPtr, IntPtr)
at System.Windows.Forms.UnsafeNativeMethods.DispatchMessageW(MSG ByRef)
at System.Windows.Forms.Application+ComponentManager.System.Windows.Forms.UnsafeNativeMethods.IMsoComponentManager.FPushMessageLoop(IntPtr, Int32, Int32)
at System.Windows.Forms.Application+ThreadContext.RunMessageLoopInner(Int32, System.Windows.Forms.ApplicationContext)
at System.Windows.Forms.Application+ThreadContext.RunMessageLoop(Int32, System.Windows.Forms.ApplicationContext)
at <Company>.Windows.Forms.<Application>.Startup.Main(System.String[])
还有一个与 comctl32.dll 相关的:
Faulting application name: <Application>.exe, version: 7.13.0.2086, time stamp: 0x4ec5e710
Faulting module name: comctl32.dll, version: 5.82.7601.17514, time stamp: 0x4ce7b82c
Exception code: 0xc0000005
Fault offset: 0x00043286
Faulting process id: 0xcdc
Faulting application start time: 0x01cca96312446309
Faulting application path: C:\Program Files\<Company>\Client\<Application>.exe
Faulting module path: C:\Windows\WinSxS\x86_microsoft.windows.common-controls_6595b64144ccf1df_5.82.7601.17514_none_ec83dffa859149af\comctl32.dll
Report Id: b425143c-1575-11e1-bccf-6c626d955bf1
第一个堆栈跟踪会根据工作流中错误发生的位置而变化,但是堆栈上的前 9 个项目始终相同,不同之处通常是出现在 Main() 方法和RunMessageLoop 方法。例如:
Application: <Application>.exe
Framework Version: v4.0.30319
Description: The process was terminated due to an unhandled exception.
Exception Info: System.AccessViolationException
Stack:
at System.Windows.Forms.UnsafeNativeMethods.CallWindowProc(IntPtr, IntPtr, Int32, IntPtr, IntPtr)
at System.Windows.Forms.NativeWindow.DefWndProc(System.Windows.Forms.Message ByRef)
at System.Windows.Forms.ToolTip.WndProc(System.Windows.Forms.Message ByRef)
at System.Windows.Forms.ToolTip+ToolTipNativeWindow.WndProc(System.Windows.Forms.Message ByRef)
at System.Windows.Forms.NativeWindow.Callback(IntPtr, Int32, IntPtr, IntPtr)
at System.Windows.Forms.UnsafeNativeMethods.DispatchMessageW(MSG ByRef)
at System.Windows.Forms.Application+ComponentManager.System.Windows.Forms.UnsafeNativeMethods.IMsoComponentManager.FPushMessageLoop(IntPtr, Int32, Int32)
at System.Windows.Forms.Application+ThreadContext.RunMessageLoopInner(Int32, System.Windows.Forms.ApplicationContext)
at System.Windows.Forms.Application+ThreadContext.RunMessageLoop(Int32, System.Windows.Forms.ApplicationContext)
at System.Windows.Forms.Application.RunDialog(System.Windows.Forms.Form)
at System.Windows.Forms.Form.ShowDialog(System.Windows.Forms.IWin32Window)
at System.Windows.Forms.Form.ShowDialog()
at <Company>.Windows.Forms.<Application>.ApplicationForm.<EventSubscribingMethod>(System.Object, System.EventArgs)
at <Company>.<Application>.<Class1>.RaiseShowResultDialogNowEvent()
at System.Windows.Forms.Control.InvokeMarshaledCallbackDo(ThreadMethodEntry)
at System.Windows.Forms.Control.InvokeMarshaledCallbackHelper(System.Object)
at System.Threading.ExecutionContext.runTryCode(System.Object)
at System.Runtime.CompilerServices.RuntimeHelpers.ExecuteCodeWithGuaranteedCleanup(TryCode, CleanupCode, System.Object)
at System.Threading.ExecutionContext.RunInternal(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object)
at System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object, Boolean)
at System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object)
at System.Windows.Forms.Control.InvokeMarshaledCallback(ThreadMethodEntry)
at System.Windows.Forms.Control.InvokeMarshaledCallbacks()
at System.Windows.Forms.Control.WndProc(System.Windows.Forms.Message ByRef)
at System.Windows.Forms.ScrollableControl.WndProc(System.Windows.Forms.Message ByRef)
at System.Windows.Forms.Form.WndProc(System.Windows.Forms.Message ByRef)
at System.Windows.Forms.Control+ControlNativeWindow.OnMessage(System.Windows.Forms.Message ByRef)
at System.Windows.Forms.Control+ControlNativeWindow.WndProc(System.Windows.Forms.Message ByRef)
at System.Windows.Forms.NativeWindow.Callback(IntPtr, Int32, IntPtr, IntPtr)
at System.Windows.Forms.UnsafeNativeMethods.DispatchMessageW(MSG ByRef)
at System.Windows.Forms.Application+ComponentManager.System.Windows.Forms.UnsafeNativeMethods.IMsoComponentManager.FPushMessageLoop(IntPtr, Int32, Int32)
at System.Windows.Forms.Application+ThreadContext.RunMessageLoopInner(Int32, System.Windows.Forms.ApplicationContext)
at System.Windows.Forms.Application+ThreadContext.RunMessageLoop(Int32, System.Windows.Forms.ApplicationContext)
at <Company>.Windows.Forms.<Application>.Portal.Startup.Main(System.String[])
---- 更新----
我收到了包含 Main 中的一些代码的请求,我不想包含所有代码,但摘录如下:
<System.STAThread()> _
Public Shared Function Main(ByVal args() As String) As Integer
-- Perform startup validation, setup logging framework, etc
...
Dim appLife as new ApplicationContext(myStartupForm)
Application.Run(appLife)
Return 0
End Function
一些补充说明:
- 我们正在使用 MS 模式和实践中的 UI 流程应用程序块
- 我们确实在几个控件中覆盖了 WndProc,包括来自代码项目 http://www.codeproject.com/KB/combobox/extending_combobox.aspx 的 CheckBoxComboBox
有人知道是什么原因造成的吗?
谢谢,
【问题讨论】:
-
请在
Main()中显示代码。看起来你没有打电话给Application.Run。 -
感谢您提供额外信息。
0xc0000005是本机NullReferenceException。正如你所说,你正在覆盖WndProc我可能会在那里寻找任何空指针。
标签: winforms windows-7 .net-4.0 tooltip