[clang] [compiler-rt] [llvm] [rtsan][llvm][NFC] Rename sanitize_realtime_unsafe attr to sanitize_realtime_blocking (PR #113155)

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davidtrevelyan wrote:

> > LGTM - would love some eyes from more established folks to make sure we are not breaking any bw-compatability foo, and seeing as this spans the tree a bit.
> > Definitely I am for this change, I think the attr is more clear this way, and we caught it before LLVM 20 was cut.
> 
> Having that it was just recently landed, I don't see a problem with breaking bw-comp.
> 
> Did you consider `sanitize_blocking` ?

Many thanks for taking a look and for confirming the bw-comp issue.

Thanks also for the suggestion on `sanitize_blocking`. We didn't consider it initially because rtsan is the only sanitizer that currently cares about it, and we wanted to keep its scope as small as possible. However - I'm not strongly opposed to renaming it `sanitize_blocking`, especially if other sanitizers might wish to do something with it in future. I'll wait a few days here for further feedback on this before landing, otherwise assuming everyone is happy enough going with `sanitize_realtime_blocking` for now 👍  

https://github.com/llvm/llvm-project/pull/113155