From owner-freebsd-hackers  Wed May 30  6:55:56 2001
Delivered-To: freebsd-hackers@freebsd.org
Received: from sivka.carrier.kiev.ua (sivka.carrier.kiev.ua [193.193.193.101])
	by hub.freebsd.org (Postfix) with ESMTP id 2131F37B422
	for <freebsd-hackers@FreeBSD.org>; Wed, 30 May 2001 06:55:50 -0700 (PDT)
	(envelope-from diman@asd-g.com)
Received: from core.is.kiev.ua (p187.is.kiev.ua [62.244.5.187] (may be forged))
        by sivka.carrier.kiev.ua (8/Kilkenny_is_better) with ESMTP id QVK48964;
        Wed, 30 May 2001 16:55:41 +0300 (EEST)
        (envelope-from diman@asd-g.com)
Received: from [10.203.1.10] ([10.203.1.10])
	by core.is.kiev.ua (8.11.1/ASDG-2.3-NR) with ESMTP id f4UDteM34096;
	Wed, 30 May 2001 16:55:40 +0300 (EEST)
	(envelope-from diman@asd-g.com)
Date: Wed, 30 May 2001 13:52:06 +0000 (GMT)
From: diman <diman@asd-g.com>
X-Sender: diman@portal.none.ua
To: Jiangyi Liu <gzjyliu@public.guangzhou.gd.cn>
Cc: freebsd-hackers@FreeBSD.org
Subject: Re: Weird PT_DETACH
In-Reply-To: <000b01c0e90a$2ee15d00$a701160a@fatcow>
Message-ID: <Pine.BSF.4.21.0105301340140.201-100000@portal.none.ua>
MIME-Version: 1.0
Content-Type: TEXT/PLAIN; charset=US-ASCII
Sender: owner-freebsd-hackers@FreeBSD.ORG
Precedence: bulk
List-ID: <freebsd-hackers.FreeBSD.ORG>
List-Archive: <http://docs.freebsd.org/mail/> (Web Archive)
List-Help: <mailto:majordomo?subject=help> (List Instructions)
List-Subscribe: <mailto:majordomo?subject=subscribe%20freebsd-hackers>
List-Unsubscribe: <mailto:majordomo?subject=unsubscribe%20freebsd-hackers>
X-Loop: FreeBSD.ORG


	If i understand ptrace(2) manual page correctly,
	you should use 
		ptrace(PT_DETACH,pid,(caddr_t)1,0)
	instead of 
		ptrace(PT_DETACH,pid,0,0) .

	BTW you code is *very hard to debug* on my 4.1.1 :)
	What your uname -a tells you?



On Wed, 30 May 2001, Jiangyi Liu wrote:

> Hi,
> 
> Sorry I didn't point out that my purpose is just to stop the debugging and leave the subprocess alone. It's supposed after PT_DETACH, the subprocess should continue, but it didn't. That's what I felt weird. Any clue?
> 
> ----- Original Message ----- 
> From: "diman" <diman@asd-g.com>
> To: "Jiangyi Liu" <gzjyliu@public.guangzhou.gd.cn>
> Cc: <freebsd-hackers@FreeBSD.ORG>
> Sent: Wednesday, May 30, 2001 8:54 PM
> Subject: Re: Weird PT_DETACH
> 
> 
> > 
> > 
> > To attach debugger to a process please use PT_ATTACH
> > request instead of PT_DETACH. Use PT_DETACH to stop
> > debugging a process and leave it alone.
> > 
> 
> 


To Unsubscribe: send mail to majordomo@FreeBSD.org
with "unsubscribe freebsd-hackers" in the body of the message