Si verifica un problema con la nostra applicazione Windows Form in fase di chiusura a causa di un'eccezione non gestita di tipo AccessViolationException che indica che la traccia dello stack si verifica all'interno del controllo ToolTip.AccessViolationException su ToolTip che presenta errori COMCTL32.dll - .NET 4.0
L'errore si verifica in momenti diversi dell'applicazione e al momento non è possibile riprodurlo in modo affidabile. In questa fase si verifica solo in produzione su Windows 7 e solo per alcuni utenti, ma non per altri - anche tra gli utenti che utilizzano l'applicazione in modo simile. Sembra essere correlato alla macchina e quindi abbiamo fatto cose come assicurarsi che il driver grafico sia aggiornato.
Nel registro eventi, ci sono sempre 2 diversi errori registrati, uno relativo alla nostra applicazione:
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[])
e uno in materia di comctl32.dll:
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
la prima pila modifiche traccia a seconda di dove nel flusso di lavoro si verifica l'errore, tuttavia, i primi 9 elementi nello stack sono sempre gli stessi, la differenza è solitamente una chiamata showDialog che appare tra il metodo Main() e il metodo RunMessageLoop. Ad esempio:
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[])
---- ---- Aggiornamento
ho avuto una richiesta di includere una parte del codice da Main, non voglio includere tutto il codice, ma è un estratto :
<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
Alcune note aggiuntive:
- stiamo usando il processo di UI Application Block dai modelli SM e pratiche
- Noi l'override WndProc in un paio di controlli, tra cui CheckBoxComboBox dal progetto di codice a http://www.codeproject.com/KB/combobox/extending_combobox.aspx
Qualcuno sa che cosa potrebbe causare questo?
Grazie,
Mostra il codice in 'Main()' per favore. Sembra che tu non stia chiamando 'Application.Run'. – leppie
Grazie per ulteriori informazioni. '0xc0000005' è un nativo' NullReferenceException'. Come stai dicendo che stai eseguendo l'override di 'WndProc', probabilmente guarderei lì per eventuali puntatori nulli. – leppie