Zamboni Zamboni - 1 month ago 4
C# Question

How to detect if a program is executing under a thrown exception at runtime?

Can I detect at runtime inside method Helper() that the program execution is the result of a thrown exception?

Note, my goal is to avoid extending method Helper() to take an exception object as a input pararmeter.

public void MyFunc1()
{
try
{
// some code here that eventaully throws an exception
}
catch( Exception ex )
{
Helper();
}
}

public void MyFunc2()
{
Helper();
}

private void Helper()
{
// how can I check if program execution is the
// result of a thrown exception here.
}

Answer

There is one horrible hack involving Marshal.GetExceptionPointers and Marshal.GetExceptionCode that doesn't work on all platforms here it is:

public static Boolean IsInException()
{
   return Marshal.GetExceptionPointers() != IntPtr.Zero ||
          Marshal.GetExceptionCode() != 0;
}

From this page: http://www.codewrecks.com/blog/index.php/2008/07/25/detecting-if-finally-block-is-executing-for-an-manhandled-exception/

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