Is the stack trace of function that has been inlined preserved on a thrown exception?

Question

When compiling an executable in Release mode -with code optimizations enabled- the compiler may opt to inline functions that meet certain criteria in order to improve

Answer 1

It depends how the exception was thrown. If you use the throw statement then you don't have a problem, the jitter won't inline methods that contain a throw. Something to be aware of when you need a property setter to be fast btw.

However, if the exception is caused by normal execution, like a NullReferenceException or IndexOutOfRangeException etc, then yes, you don't see the name of the method on the stack trace if it was inlined. This can be a bit bewildering but you usually figure it out from the source code of the calling method and the exception type. Hopefully it is relatively small. The [MethodImpl(MethodImplOptions.NoInlining)] attribute is available to suppress inlining. By the time you discover it would be helpful it is usually too late ;)