Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751986AbaL3WSx (ORCPT ); Tue, 30 Dec 2014 17:18:53 -0500 Received: from mail7.hitachi.co.jp ([133.145.228.42]:50046 "EHLO mail7.hitachi.co.jp" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751748AbaL3WSw (ORCPT ); Tue, 30 Dec 2014 17:18:52 -0500 Message-ID: <54A324C5.4080605@hitachi.com> Date: Wed, 31 Dec 2014 07:18:45 +0900 From: Masami Hiramatsu Organization: Hitachi, Ltd., Japan User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:13.0) Gecko/20120614 Thunderbird/13.0.1 MIME-Version: 1.0 To: David Ahern Cc: Arnaldo Carvalho de Melo , LKML Subject: Re: problems with perf probe and system libraries References: <54A2285F.3040200@gmail.com> In-Reply-To: <54A2285F.3040200@gmail.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi David, (2014/12/30 13:21), David Ahern wrote: > Hi Masami: > > I have been looking at perf-probe again and having a number of problems > with top of tree. > > Here's the first one I have isolated: > > $ perf probe -x /lib64/libc-2.18.so -a 'malloc size=%di' > Probe point 'malloc' not found. > Error: Failed to add events. It seems to fail when failed to open debuginfo. I confirmed it on ubuntu 14.04 too. I'll try to fix that. Thank you for reporting! > > $ perf probe -x /lib64/libc-2.18.so -F | grep malloc > malloc > malloc@plt > malloc_atfork > malloc_check > malloc_consolidate > malloc_hook_ini > malloc_info > malloc_printerr > mallochook > ptmalloc_init > ptmalloc_init.part.8 > ptmalloc_lock_all > ptmalloc_unlock_all > ptmalloc_unlock_all2 > tr_mallochook > > $ perf probe -x /lib64/libc-2.18.so -a 'malloc=malloc size=%di' > Probe point 'malloc' not found. > Error: Failed to add events. > > A year ago (v3.12) this worked fine so I did a git bisect which points to: > > commit fb7345bbf7fad9bf72ef63a19c707970b9685812 > Author: Masami Hiramatsu > Date: Thu Dec 26 05:41:53 2013 +0000 > > perf probe: Support basic dwarf-based operations on uprobe events > > I have tried top of tree on Fedora 16, 18 and 20 with a variety of > kernels - and a variety of results. Reverting to > 8a613d40e389b723fd5889ac8d4033ed4030be31 which is the commit before this > one and it works again. > > David > -- > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/ > -- Masami HIRAMATSU Software Platform Research Dept. Linux Technology Research Center Hitachi, Ltd., Yokohama Research Laboratory E-mail: masami.hiramatsu.pt@hitachi.com -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/