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9.0

Solving AccessViolationException

Asked by EyalL in Microsoft Visual C++, Microsoft Visual C#.Net, Microsoft Visual C++.Net

Tags: C#, .NET, Debugging, Exceptions

Hi There,

I got this impossible bug that I'm trying to solve. The problem is that an exception happens inside an OpenGL function. The exception usually happens between 30min and 3 hours. The exception happens on part of the computers only (the hardware is different).
When the exception happens, it ALLWAYS happens at the same place, the stack trace always looks the same (See trace below).

I searched the internet and found the couple of links that reminds what I'm experiencing:
http://www.taoframework.com/node/492
http://www.taoframework.com/node/666


Additional information:
  * The application is developed using C# with CSGL for OpenGL interface and some unmanaged code for USB driver access.
  * After the exception happens the only means to get OpenGL running again is by restarting the program.
  * We found that when the USB interface is disabled things seems to be ok. We also found the if a "sleep(10)" was  added after the DeviceIOControl command things are OK.

Please advice.
Regards,
Edo
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************** Exception Text **************
	System.AccessViolationException: Attempted to read or write protected memory. This is often an indication that other memory is corrupt.
	   at CsGL.OpenGL.OpenGL.glGetError()
	   at CsGL.OpenGL.OpenGLException.Assert()
	   at CsGL.OpenGL.OpenGLControl.OnPaint(PaintEventArgs pevent)
	   at System.Windows.Forms.Control.PaintWithErrorHandling(PaintEventArgs e, Int16 layer, Boolean disposeEventArgs)
	   at System.Windows.Forms.Control.WmPaint(Message& m)
	   at System.Windows.Forms.Control.WndProc(Message& m)
	   at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)
	   at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
	   at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)
[+][-]06/15/09 07:42 AM, ID: 24629335Expert Comment

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About this solution

Zones: Microsoft Visual C++, Microsoft Visual C#.Net, Microsoft Visual C++.Net
Tags: C#, .NET, Debugging, Exceptions
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Solution Provided By: itsmeandnobodyelse
Participating Experts: 3
Solution Grade: A
 
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