From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751798Ab0IDFLu (ORCPT ); Sat, 4 Sep 2010 01:11:50 -0400 Received: from mx1.redhat.com ([209.132.183.28]:54822 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750772Ab0IDFLt (ORCPT ); Sat, 4 Sep 2010 01:11:49 -0400 Date: Sat, 4 Sep 2010 01:11:38 -0400 From: "Frank Ch. Eigler" To: Hui Zhu Cc: Steven , "gdb@sourceware.org" , linux-kernel@vger.kernel.org, Michael Snyder , Marc Khouzam , Thiago Jung Bauermann Subject: Re: Linux Kernel GDB tracepoint module 2010-8-30 release Message-ID: <20100904051138.GC10118@redhat.com> References: <1283504768.2100.43.camel@steven> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.4.2.2i Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi - On Sat, Sep 04, 2010 at 12:29:56PM +0800, Hui Zhu wrote: > [...] Could you talk about how it do call stack dump like following? > (gdb) trace vfs_readdir > Tracepoint 1 at 0xffffffff8113f7fc: file > /home/teawater/kernel/linux-2.6/fs/readdir.c, line 24. > (gdb) actions > >collect *(unsigned char *)$rsp@512 probe kernel.function("vfs_readdir") { // if you want the whole kernel-side backtrace, dwarf-unwound print_backtrace() // or else just hex-dump a region printf("%*M\n", 512, register("rsp")) } > BTW, I was not find out which ARCH of the systemtap support in its > website? It support all the arch that kprobe support? Yes, basically, though it's mostly tested on RHELy platforms (x86, powerpc, s390, ia64). - FChE