From owner-freebsd-hackers@FreeBSD.ORG  Wed Apr  4 07:58:38 2012
Return-Path: <owner-freebsd-hackers@FreeBSD.ORG>
Delivered-To: freebsd-hackers@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52])
	by hub.freebsd.org (Postfix) with ESMTP id 1A786106566C;
	Wed,  4 Apr 2012 07:58:38 +0000 (UTC)
	(envelope-from utisoft@gmail.com)
Received: from mail-bk0-f54.google.com (mail-bk0-f54.google.com
	[209.85.214.54])
	by mx1.freebsd.org (Postfix) with ESMTP id 034CC8FC0C;
	Wed,  4 Apr 2012 07:58:36 +0000 (UTC)
Received: by bkcjc3 with SMTP id jc3so575983bkc.13
	for <multiple recipients>; Wed, 04 Apr 2012 00:58:35 -0700 (PDT)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113;
	h=mime-version:in-reply-to:references:date:message-id:subject:from:to
	:cc:content-type;
	bh=vjF8YXrYzIlaBR4MEshQrTPB4cCRiUu00Yn8Q6Y8Xmo=;
	b=PmZFL2tLmhZjf7Heu7NZtDUep7Do27Y6WAxH9Nk0FmUKVrYvbMzbTtGzHrO7LHJbL1
	4cjk5M0pPgJlBrefZj72NYI5gyolVVZKxyyFB/td4fb0iA5KVlmZ2t8nGcZCnfkXCaCP
	/R/ZxsXVquyyvPA7tYGWutplEWTT69M3zeyH7G1wtvLLBwTnja54orVGYOy99ha2V0fq
	11Ra9v8/4o7fr3VTtCXSjJLx1j6R9l1t4N9S+8dDfVrHpYDdCgJ6bl4uaGWicr6DqIR7
	Ahg2W+5dOzwMja/ZNycMgbahMGV8x9FzqhWyAmCnN1T2r30RhZ+QtmIkoelnka/lRNBw
	JQxA==
MIME-Version: 1.0
Received: by 10.204.154.28 with SMTP id m28mr6620541bkw.102.1333526315763;
	Wed, 04 Apr 2012 00:58:35 -0700 (PDT)
Received: by 10.204.202.142 with HTTP; Wed, 4 Apr 2012 00:58:35 -0700 (PDT)
Received: by 10.204.202.142 with HTTP; Wed, 4 Apr 2012 00:58:35 -0700 (PDT)
In-Reply-To: <4F7BDF06.8000104@freebsd.org>
References: <4F775DF5.1020704@rawbw.com> <201204020831.09253.jhb@freebsd.org>
	<4F79D63E.7010200@rawbw.com> <201204021312.36568.jhb@freebsd.org>
	<4F7BDF06.8000104@freebsd.org>
Date: Wed, 4 Apr 2012 07:58:35 +0000
Message-ID: <CADLo83832hFWMRYK4VYtx_0JTXRT8-2tFyUmbSwe+v2n8+hTfg@mail.gmail.com>
From: Chris Rees <utisoft@gmail.com>
To: Julian Elischer <julian@freebsd.org>
Content-Type: text/plain; charset=ISO-8859-1
X-Content-Filtered-By: Mailman/MimeDel 2.1.5
Cc: freebsd-hackers@freebsd.org, hackers@freebsd.org, Yuri <yuri@rawbw.com>
Subject: Re: Is there any modern alternative to pstack?
X-BeenThere: freebsd-hackers@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: Technical Discussions relating to FreeBSD
	<freebsd-hackers.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-hackers>, 
	<mailto:freebsd-hackers-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-hackers>
List-Post: <mailto:freebsd-hackers@freebsd.org>
List-Help: <mailto:freebsd-hackers-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-hackers>,
	<mailto:freebsd-hackers-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Wed, 04 Apr 2012 07:58:38 -0000

On 4 Apr 2012 06:41, "Julian Elischer" <julian@freebsd.org> wrote:
>
> On 4/2/12 10:12 AM, John Baldwin wrote:
>>
>> On Monday, April 02, 2012 12:39:26 pm Yuri wrote:
>>>
>>> On 04/02/2012 05:31, John Baldwin wrote:
>>>>
>>>> Hmm, I don't know if the port has it, but I did some work on pstack a
while
>>>> ago to make it work with libthread_db so it at least handles i386 ok.
 It
>>>> needs to be modified to use something like libunwind though or some
other
>>>> unwinder.  And possibly it should use libelf instead of its own
ELF-parsing
>>>> code.
>>>
>>> I see pstack -1.2_1 failing even on i386:
>>>
>>> pstack: cannot read context for thread 0x1879f
>>> pstack: failed to read more threads
>>
>> Yes, threads don't work for modern binaries (newer than 4.x) without my
changes
>> to make it use libthread_db.  You can find the patch I used for this at
>> http://www.freebsd.org/~jhb/patches/pstack_threads.patch
>
>
> should be in ports?
>
>

I'm on it.

Chris