From owner-freebsd-threads@FreeBSD.ORG  Thu Jun 30 06:28:23 2011
Return-Path: <owner-freebsd-threads@FreeBSD.ORG>
Delivered-To: freebsd-threads@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id 1F002106566C
	for <freebsd-threads@freebsd.org>; Thu, 30 Jun 2011 06:28:23 +0000 (UTC)
	(envelope-from davidxu@freebsd.org)
Received: from freefall.freebsd.org (freefall.freebsd.org
	[IPv6:2001:4f8:fff6::28])
	by mx1.freebsd.org (Postfix) with ESMTP id 0E4318FC13;
	Thu, 30 Jun 2011 06:28:23 +0000 (UTC)
Received: from xyf.my.dom (localhost [127.0.0.1])
	by freefall.freebsd.org (8.14.4/8.14.4) with ESMTP id p5U6SLow098996;
	Thu, 30 Jun 2011 06:28:22 GMT (envelope-from davidxu@freebsd.org)
Message-ID: <4E0C1787.8030102@freebsd.org>
Date: Thu, 30 Jun 2011 14:28:23 +0800
From: David Xu <davidxu@freebsd.org>
User-Agent: Mozilla/5.0 (X11; U; FreeBSD i386; en-US;
	rv:1.9.2.13) Gecko/20110127 Thunderbird/3.1.7
MIME-Version: 1.0
To: John Schumacher <schumjs@gmail.com>
References: <BANLkTik5e87v59kP6emD=D5H8JmghTcu4Q@mail.gmail.com>
In-Reply-To: <BANLkTik5e87v59kP6emD=D5H8JmghTcu4Q@mail.gmail.com>
Content-Type: text/plain; charset=ISO-8859-1
Content-Transfer-Encoding: 7bit
Cc: freebsd-threads@freebsd.org
Subject: Re: Using fbsd-threads.c versus thread-db.c (gdbserver)
X-BeenThere: freebsd-threads@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: Threading on FreeBSD <freebsd-threads.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-threads>, 
	<mailto:freebsd-threads-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-threads>
List-Post: <mailto:freebsd-threads@freebsd.org>
List-Help: <mailto:freebsd-threads-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-threads>,
	<mailto:freebsd-threads-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Thu, 30 Jun 2011 06:28:23 -0000

On 2011/06/30 01:36, John Schumacher wrote:
> Question:
> Does anyone understand the differences between freebsd-threads.c and
> thread-db.c in FreeBSD?
> Linux's gdbserver makes calls to thread-db.c and thread-db.c sits in the
> gdbserver folder in the 8.1 FreeBSD distro.
> However, I notice that fbsd-threads.c (which sits in
> FreeBSD\8.1\builds\8.1\kernel\source\gnu\usr.bin\gdb\libgdb) has similar
> functionality.
> Is the thread-db.c sitting in the gdbserver a relic from when it was ported
> over, and doesn't work with FreeBSD? Should one use the fbsd-threads.c to
> query the kernel for new and existing threads?
> 
AFAIK, thread-db.c is for Linux only, fbsd-threads.c is FreeBSD code
which implements gdb's target, the code depends on external library
called libthread_db which is a standard to query threads.

> Thanks
> -John
>