Explanation of MProtect Errno 12 (ENOMEM)

Question

I\'m writing an iPhone application using Monotouch and recently the app has started crashing stating

Mprotect failed at 0x863a000 (length 8192) with errno 1         


        

Answer 1

Does your app use Generics?

Beware of having virtual methods on types with Generics, for Monotouch, which has to do lots of hacks while pre-jitting and some more magic with trampolines, it can cause some method hijacking, or memory corruption, on my experience, YMMV.

Make all methods non-virtual on Generic classes for safety.