Stack is traditionally accessible too. So you mean global/static memory? What languages would let you edit that? Can you get a pointer to it in C and change thi

Stack is traditionally accessible too. So you mean global/static memory? What languages would let you edit that? Can you get a pointer to it in C and change things, or is it stored in protected memory blocks with the program text? You seem to suggest that the snapshot of the heap gets not just freed sections of the heap but the whole heap? If so then my other idea is invalidated (allocate on the heap a chunk of memory large enough for the keys and never free it, just re-use it when needed).