threads/101323: fork(2) in threaded programs broken.

[Daniel Eischen]

The following reply was made to PR threads/101323; it has been noted by GNATS.

From: Daniel Eischen <deischen at freebsd.org>
To: Poul-Henning Kamp <phk at critter.freebsd.dk>
Cc: FreeBSD-gnats-submit at freebsd.org, freebsd-threads at freebsd.org
Subject: Re: threads/101323: fork(2) in threaded programs broken.
Date: Thu, 3 Aug 2006 13:51:45 -0400 (EDT)

 On Thu, 3 Aug 2006, Poul-Henning Kamp wrote:
 
 > 	Forking a threaded process and starting a thread in the
 > 	child process does not work.
 >
 > 	Tested on -current and releng_6 and both fails with more or
 > 	less the same error message:
 >
 > 	Fatal error 'mutex is on list' at line 540 in file
 > 	    /usr/src/lib/libpthread/thread/thr_mutex.c (errno = 0)
 
 fork()ing from a threaded process and making calls to functions
 other than those defined as async-signal-safe is not allowed 
 by POSIX.  libpthread intentionally doesn't support this.
 
 -- 
 DE