[Bug 239550] std::thread::id uses pthread_equal in undefined ways not handled by _pthread_stubs
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Tue Aug 20 17:40:01 UTC 2019
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=239550
--- Comment #4 from commit-hook at freebsd.org ---
A commit references this bug:
Author: dim
Date: Tue Aug 20 17:39:34 UTC 2019
New revision: 351253
URL: https://svnweb.freebsd.org/changeset/base/351253
Log:
Pull in r368867 from upstream libc++ trunk (by Marshall Clow):
Rework recursive_timed_mutex so that it uses __thread_id instead of
using the lower-level __libcpp_thread_id. This is prep for fixing
PR42918. Reviewed as https://reviews.llvm.org/D65895
Pull in r368916 from upstream libc++ trunk (by Marshall Clow):
Fix thread comparison by making sure we never pass our special 'not a
thread' value to the underlying implementation. Fixes PR#42918.
This should fix std::thread::id::operator==() attempting to call
pthread_equal(3) with zero values.
Reported by: andrew at tao11.riddles.org.uk
PR: 239038, 239550
MFC after: 3 days
Changes:
head/contrib/libc++/include/__threading_support
head/contrib/libc++/include/mutex
head/contrib/libc++/include/thread
head/contrib/libc++/src/mutex.cpp
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