[LLVMdev] Multi-threading and mutexes in LLVM

[Kostya Serebryany]

>
>
> On FreeBSD and OS X, the underlying pthread_mutex can already do deadlock
> detection, so I don't see why you'd need to add another word.  The
> PTHREAD_MUTEX_ERRORCHECK attribute has been part of POSIX since 1997, so
> I'd expect it to be supported everywhere.
>

PTHREAD_MUTEX_ERRORCHECK detects the deadlock that already happened.
tsan's deadlock detector (as well as helgrind and many other similar tools)
detects lock order inversion, i.e. a situation which may potentially lead
to a deadlock.

--kcc
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