Custom memory allocation in C# Part 15 — Allocating object on a stack without unsafe

This is the fifteenth part of the Custom memory allocation series. For your convenience you can find other parts in the table of contents in Part 1 — Allocating object on a stack

Last time we saw how to do unsafe operations without the unsafe keyword. This time we’ll allocate some reference type on a stack in a similar manner.

Let’s this code:

In line 43 we have a machine code for getting the esp register. In line 22 we modify the GetStackAddress method with our machine code.

We allocate some structure on the stack which we’ll later override with a reference type. We do it in line 34.

Finally, you can see how we take type in line 36 and then modify reference instance field by using structure. This confirms the object is exactly in the stack.