llvm-project

It has been available in Apple's version[1] for several years, and it appears to be migrating into upstream as well. On macOS you can try it with: clang -Xclang -fbounds-safety program.c Microsoft also seems to be using it (see above link regarding lib0xc). [1] https://github.com/swiftlang/llvm-project

https://discourse.llvm.org/t/the-preview-of-fbounds-safety-i...: “-fbounds-safety is a language extension to enforce a strong bounds safety guarantee for C. Here is our original RFC. We are thrilled to announce that the preview implementation of -fbounds-safety is publicly available at this fork of llvm-project. Please note that we are still actively working on incrementally open-sourcing this feature in the llvm.org/llvm-project . To date, we have landed only a small subset of our implementation, and the feature is not yet available for use there. However, the preview does contain the working feature. Here is a quick instruction on how to adopt it.” “This fork” is https://github.com/swiftlang/llvm-project/tree/stable/202407..., Apple’s fork of LLVM. That branch is from a year ago. I don’t know whether there’s a newer publicly available v

> Today there are a few non-trivial differences from LLVM, but we are actively working on either upstreaming or reverting those differences https://github.com/swiftlang/llvm-project

Swift's LLVM fork is open-source, just not upstreamed. No Free Software license requires forks to upstream their changes. https://github.com/swiftlang/llvm-project

It’s open source: https://github.com/apple/llvm-project

Pointer authentication cannot protect against all pointer substitutions, because doing so to arbitrary C++ code would violate language guarantees. https://github.com/apple/llvm-project/blob/next/clang/docs/P... is a good overview of which things can and can’t be signed because of standards compliance.

The link to the clang pointer auth doc is broken, Apple changed their default branch name to 'main' instead of 'master'. A (more?) permanent link is [1]. [1] https://github.com/apple/llvm-project/blob/73ea7cb9eba3196ae...

It takes them a while. Apple A13 is there in the Apple LLVM target list at https://github.com/apple/llvm-project/blob/master/llvm/lib/T.... A14/M1 will come, but the question is when...