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X-Authentication-Warning: slinky.cs.nyu.edu: pechtcha owned process doing -bs
Date: Thu, 19 Jun 2003 14:25:20 -0400 (EDT)
From: Igor Pechtchanski <pechtcha AT cs DOT nyu DOT edu>
Reply-To: cygwin AT cygwin DOT com
To: cygwin AT cygwin DOT com
Subject: Re: gdb attach/detach kills the target process
In-Reply-To: <20030619181441.GA6540@redhat.com>
Message-ID: <Pine.GSO.4.44.0306191423100.22307-100000@slinky.cs.nyu.edu>
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On Thu, 19 Jun 2003, Christopher Faylor wrote:

> On Wed, Jun 18, 2003 at 07:33:38PM -0400, Igor Pechtchanski wrote:
> >On 18 Jun 2003, Sam Steingold wrote:
> >>run a process in a cygwin window, find out its PID, run gdb in another
> >>window, attach to that process, then detach from it.  the target
> >>process stops responding as soon as it is attached to.  detaching
> >>changes nothing.  only after I exit gdb, I get the original window
> >>responding, with the terminal in raw start (need to do "reset" in bash)
> >>and the process that gdb attached to dead.
> >>
> >>I tested this on python and clisp.
> >
> >That's the way Windows debugging works -- once you attach to a process,
> >detaching from it kills the process.  No way around it.  Furthermore,
> >the process is killed using the Windows APIs, thus no signal ever
> >reaches the process and no cleanup is performed.
>
> That's not entirely true.  Detaching works ok on Windows XP.
> cgf

Umm, yes, Corinna has mentioned this too.  I don't work with WinXP, so I
didn't know about it.  However, had the OP worked in WinXP, he wouldn't
have had the above problem in the first place, so I can assume he's
working in some other OS, and thus his problem is inherent in the API.
	Igor
-- 
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     |,4-  ) )-,_. ,\ (  `'-'		Igor Pechtchanski, Ph.D.
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