[compiler-rt] [TSan] Add interceptor for os_unfair_lock_lock_with_flags (PR #153815)

[Mariusz Borsa via llvm-commits]

wrotki wrote:

When does this test fail (even original version you modified)? Perhaps I'm missing something.

I think it should verify that the interceptor is actually active, i.e. create a race (e.g. print global_variable from _within_  Trace function), while omitting os_unfair_lock_lock calls, and check for the diagnostics appearing. Then test the same, enabling locks - and the diagnostics should be gone.



https://github.com/llvm/llvm-project/pull/153815