[Bug 271490] Deadlock between _rtld_atfork_pre and _thr_attr_init

[email protected] Thu, 18 May 2023 17:44:25 +0000

Newsgroups	gmane.os.freebsd.devel.threading
Message-ID	<[email protected]/bugzilla/>

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=271490

Konstantin Belousov <[email protected]> changed:

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                 CC|                            |[email protected]

--- Comment #1 from Konstantin Belousov <[email protected]> ---
Yes, this is indeed a bug in jemalloc.  It seems that the problem is that
malloc_mutex_prefork() from jemalloc/src/mutex.c does not lock _all_ jemalloc
mutexes, in particular, the extent mtx.

OTOH, note that after fork(), in multi-threaded process child, only
async-signal
safe functions are guaranteed to work.

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