invalidFunctionPointerInDelegate MDA

Note

This article is specific to .NET Framework. It doesn't apply to newer implementations of .NET, including .NET 6 and later versions.

The invalidFunctionPointerInDelegate managed debugging assistant (MDA) is activated when an invalid function pointer is passed in to construct a delegate over a native function pointer.

Symptoms

Access violations or unexpected memory corruption when using a delegate over a function pointer.

Cause

An invalid function pointer was specified.

Resolution

Specify a valid function pointer

Effect on the Runtime

This MDA has no effect on the CLR.

Output

The invalid function pointer.

Configuration

<mdaConfig>
  <assistants>
    <invalidFunctionPointerInDelegate />
  </assistants>
</mdaConfig>

See also

• MarshalAsAttribute
• Diagnosing Errors with Managed Debugging Assistants
• Interop Marshaling