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To: cygwin-developers AT sourceware DOT cygnus DOT com
Subject: Re: Yet another hanging issue.
References: <s1s66up1wg2 DOT fsf AT jaist DOT ac DOT jp> <20000314103313 DOT A15910 AT cygnus DOT com>
	<s1s3dpt1o8q DOT fsf AT jaist DOT ac DOT jp> <20000314124712 DOT A19647 AT cygnus DOT com>
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From: Kazuhiro Fujieda <fujieda AT jaist DOT ac DOT jp>
Date: 16 Mar 2000 03:29:52 +0900
In-Reply-To: Chris Faylor's message of Tue, 14 Mar 2000 12:47:12 -0500
Message-ID: <s1szos03x3z.fsf@jaist.ac.jp>
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>>> On Tue, 14 Mar 2000 12:47:12 -0500
>>> Chris Faylor <cgf AT cygnus DOT com> said:

> >In an old snapshot such as cygwin1-19990115.dll, typing `^Z'
> >makes bash return to its prompt and doesn't abort notepad.
> 
> Ok.  I restored this behavior.  It wasn't as hard as I thought.

The latest fixes stop bash consuming a cpu, but typing `^Z'
can't wake up its prompt.

I tried tracking down this and found the following problem, but
I couldn't fix it.

In that case, SIGTSTP caused by bash wakes the "sig" thread in
the win32 process creating the notepad process.  This process
can't properly handle the signal because sync_proc_subproc has
been released by proc_terminate() in spawn_guts().

In the concrete, proc_subproc() can't clean waiting threads so
the "main" thread in the process can't start to execute the
signal handler.

Is my understandings right?
____
  | AIST      Kazuhiro Fujieda <fujieda AT jaist DOT ac DOT jp>
  | HOKURIKU  School of Information Science
o_/ 1990      Japan Advanced Institute of Science and Technology