Re: GCJ built multithreaded program keeps creating zombies

[Tom Tromey <tromey at redhat dot com>]

Wolfgang> When a process (and thus, here, also a thread) ends, it
Wolfgang> remains a zombie until its return valued is reaped by a
Wolfgang> waitpid call, which should also be what pthread_join
Wolfgang> does. So unless a thread is joined, it will remain a zombie.

Is this one of those places where Linux threads don't follow posix?

We create detached threads.  My understanding is that such threads
*can't* be passed as an argument to pthread_join.

Incidentally the original reporter sent me email and said that this
was in fact not a libgcj problem.  I'm including the relevant part of
this message:

    Since the rt_sig queue under linux is of limitted size and the kernel
    does not clean it up if a process decides to leave signals in the
    queue some random time after booting the system the queue filled up
    and multithreading stopped working.

I'm going to close the PR.

Tom