[Bug 261713] ThreadSanitizer detects race in __catopen_l (via strerror_r)

From: <bugzilla-noreply_at_freebsd.org>
Date: Fri, 04 Feb 2022 20:59:48 UTC 
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=261713

Dimitry Andric <dim@FreeBSD.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|New                         |In Progress

--- Comment #2 from Dimitry Andric <dim@FreeBSD.org> ---
This is a false positive in ThreadSanitizer: it does not intercept the
_pthread_rwlock_* functions in libc, so it does not realize __catopen_l() is
locking the cache SLIST when reading and writing it, and then produces a bogus
thread race warning.

Submitted a review upstream: https://reviews.llvm.org/D119034

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