Re: zombie with CLONE_THREAD

[Linus Torvalds]

On Thu, 1 Jul 2004, Roland McGrath wrote:
> 
> > .. since this information should be available anyway (we'll have woken up 
> > the tracer, and the tracer will see that the child is gone by simply 
> > seeing the ESRCH errorcode from ptrace).
> 
> When did you wake up the tracer?  I don't see how that happened.

exit_notify() will inform the tracer:

        if (tsk->exit_signal != -1 && thread_group_empty(tsk)) {
                int signal = tsk->parent == tsk->real_parent ? tsk->exit_signal : SIGCHLD;
                do_notify_parent(tsk, signal);
        } else if (tsk->ptrace) {
***             do_notify_parent(tsk, SIGCHLD);   *****
        }

so this should catch it. It even gets the pid of the child in the siginfo 
structure if it really wants to see that..

		Linus
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/