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Date: Sun, 29 Sep 2002 10:25:16 +0200 (CEST)
From: Ingo Molnar <mingo@elte.hu>
Reply-To: Ingo Molnar <mingo@elte.hu>
To: Axel <Axel.Zeuner@gmx.de>
Cc: NPT library mailing list <phil-list@redhat.com>,
       <linux-kernel@vger.kernel.org>
Subject: Re: 2.5.39: Signal delivery to thread groups: Bug or feature
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On Sat, 28 Sep 2002, Axel wrote:

> I played a little bit with the new clone flags and wrote a small test
> program using two threads: The first (initial) thread blocks all
> signals. The second thread is created with all signals blocked and
> inherits the signal mask of the initial thread. It unblocks SIGINT and
> calls sys_rt_sigtimedwait with the remaining signal mask. Therefore it
> waits for all signals with exception of SIGINT. In the kernel this
> yields to an empty signal mask for this thread during the sigwait. No
> signal handler is installed by the process. Now an external SIGINT is
> delivered to the whole process: The signal delivery code decides to send
> this signal directly to the initial thread because no user handler is
> installed and the signal mask for this thread blocks the signal. The
> second thread never receives the SIGINT.

could you send me the testcase? Thanks,

	Ingo


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