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Date:	Fri, 16 Aug 2002 16:13:45 +0200
From:	Pavel Holejsovsky <pavel DOT holejsovsky AT st DOT com>
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To:	cygwin AT cygwin DOT com
Cc:	joseph DOT buehler AT spirentcom DOT com
Subject:	Re: GNU emacs 21.2-5 packages available
References:	<3D5D01AB DOT 7070206 AT hekimian DOT com>

> There is a minor problem with the X11 version recognizing when
> subprocesses have terminated, which I will investigate eventually.

This problem is quite annoying. I already tried to investigate, and it 
seems to me that occasionally SIGCHLD signal is NOT delivered to emacs 
when the child process terminates. I tried to continue a little bit, but 
got lost very quickly in cygwin's signal implementation (hey, that's 
*really* complicated code). I tried strace and the only thing which 
caught my eyes were these lines:

    33 40372399 [sig] emacs 16900 wait_sig: processing signal 20
   389 40372788 [sig] emacs 16900 wait_sig: Got signal 20
    48 40372836 [sig] emacs 16900 sig_handle: signal 20
    32 40372868 [sig] emacs 16900 sig_handle: signal 20, about to call 
0x201405D0
  3900 40376768 [sig] emacs 16900 setup_handler: couldn't send signal 20
   115 40376883 [sig] emacs 16900 setup_handler: good.  Didn't suspend 
main thread, th 0x0
    35 40376918 [sig] emacs 16900 setup_handler: returning 0
    31 40376949 [sig] emacs 16900 sig_handle: returning 0

Does anyone have an idea what could be wrong?

thanks
Pavel


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