[clang] nolock/noalloc attributes (PR #84983)

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https://github.com/Sirraide requested changes to this pull request.

I was following this on Discourse, so I thought I’d take a look; overall, this seems like a very interesting addition to Clang to me.

This is by no means a complete review; this pr is pretty big, so looking at everything in detail would take me a lot longer than just an hour or two, so I’ve just pointed out things that stood out to me. I’m also not particularly familiar with the analysis-based-warnings part of Clang, which is where most of the code for this pr seems to live, so I won’t be of much help there.

https://github.com/llvm/llvm-project/pull/84983