On Thu, 6 Mar 2008, Marko, Shaun wrote:
I'm working on FreeBSD 6.2 and I'm wondering if anybody can help with an issue I've found using fork and threads. The attached program demonstrates the problem. In short, if a process creates a thread, joins the thread, then forks a child process which creates a thread, the child's attempt to create a thread will cause the program to dump core with the following error message: Fatal error 'mutex is on list' at line 540 in file /usr/src/lib/libpthread/thread/thr_mutex.c (errno = 0).
You are not allowed by POSIX to call any non-async-signal-safe function from a child of a threaded program. There's words or rationale to the effect that the only purpose for forking from a threaded program should be to call one of the exec* functions. Trying to create a thread from a child (like you are trying to do) is definitely not supported. -- DE _______________________________________________ freebsd-hackers@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-hackers To unsubscribe, send any mail to "[EMAIL PROTECTED]"
