From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933808AbeEIHhF (ORCPT ); Wed, 9 May 2018 03:37:05 -0400 Received: from mail.cn.fujitsu.com ([183.91.158.132]:29128 "EHLO heian.cn.fujitsu.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S933766AbeEIHhD (ORCPT ); Wed, 9 May 2018 03:37:03 -0400 X-IronPort-AV: E=Sophos;i="5.43,368,1503331200"; d="scan'208";a="39724905" Subject: Re: [PATCH] perf test shell: Add -D to check dynamic symbols for ubuntu/debian To: , CC: , , Thomas Richter , Arnaldo Carvalho de Melo References: <1514364645-1205-1-git-send-email-lizhijian@cn.fujitsu.com> From: Li Zhijian Organization: fnst-ulinux Message-ID: <0dbb982d-9cca-cd13-9a31-cc2f6e93a748@cn.fujitsu.com> Date: Wed, 9 May 2018 15:36:58 +0800 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.7.0 MIME-Version: 1.0 In-Reply-To: <1514364645-1205-1-git-send-email-lizhijian@cn.fujitsu.com> Content-Type: text/plain; charset="utf-8"; format=flowed Content-Transfer-Encoding: 7bit Content-Language: en-US X-Originating-IP: [10.167.226.45] X-yoursite-MailScanner-ID: 2BD394B34D23.AA98E X-yoursite-MailScanner: Found to be clean X-yoursite-MailScanner-From: lizhijian@cn.fujitsu.com Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org ping On 12/27/2017 04:50 PM, Li Zhijian wrote: > On Ubuntu and Debian, we can't find any symbol including "inet_pton" from 'nm -g' > root@vm-lkp-nex04-8G-5 ~# nm -g /lib/x86_64-linux-gnu/libc-2.25.so | grep inet_pton > nm: /lib/x86_64-linux-gnu/libc-2.25.so: no symbols > > it looks libc.so has different symbol compositions at different distros > > Usage: nm [option(s)] [file(s)] > List symbols in [file(s)] (a.out by default). > The options are: > ...snip... > -D, --dynamic Display dynamic symbols instead of normal symbols > --defined-only Display only defined symbols > -e (ignored) > -f, --format=FORMAT Use the output format FORMAT. FORMAT can be `bsd', > `sysv' or `posix'. The default is `bsd' > -g, --extern-only Display only external symbols > > I tested both debian/ubuntu and RHEL, they work as expected > > CC: Thomas Richter > CC: Arnaldo Carvalho de Melo > Signed-off-by: Li Zhijian > --- > tools/perf/tests/shell/trace+probe_libc_inet_pton.sh | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/tools/perf/tests/shell/trace+probe_libc_inet_pton.sh b/tools/perf/tests/shell/trace+probe_libc_inet_pton.sh > index 8b3da21..f939bd6 100755 > --- a/tools/perf/tests/shell/trace+probe_libc_inet_pton.sh > +++ b/tools/perf/tests/shell/trace+probe_libc_inet_pton.sh > @@ -11,7 +11,7 @@ > . $(dirname $0)/lib/probe.sh > > libc=$(grep -w libc /proc/self/maps | head -1 | sed -r 's/.*[[:space:]](\/.*)/\1/g') > -nm -g $libc 2>/dev/null | fgrep -q inet_pton || exit 254 > +nm -gD $libc 2>/dev/null | fgrep -q inet_pton || exit 254 > > trace_libc_inet_pton_backtrace() { > idx=0