[PATCH] D35558: Use sys::Memory::AllocateRWX for JIT code

[Lang Hames via Phabricator via llvm-commits]

lhames added a comment.

Is AllocateRWX returning RWX blocks? If so, is anyone clearing the W bit later?

For architectures that support it, I think I would like to keep the existing scheme: JIT'd memory is initialized while in RW- mode, then switched to RX- mode prior to execution. That means JIT'd code has no easy way to modify itself during execution.

I'm also open to changing the model (I'm not a security expert) but that would require more consideration.


Repository:
  rL LLVM

https://reviews.llvm.org/D35558