linux-kernel - Re: [PATCH] perf test shell: Add -D to check dynamic symbols for ubuntu/debian

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Message-ID: <7d869226-4f44-09a3-3e52-e1a8c40c310e@cn.fujitsu.com>
Date:   Wed, 9 May 2018 15:38:48 +0800
From:   Li Zhijian <lizhijian@...fujitsu.com>
To:     <linux-kernel@...r.kernel.org>, <acme@...nel.org>
CC:     <philip.li@...el.com>, <brueckner@...ux.vnet.ibm.com>,
        Thomas Richter <tmricht@...ux.vnet.ibm.com>,
        Arnaldo Carvalho de Melo <acme@...hat.com>
Subject: Re: [PATCH] perf test shell: Add -D to check dynamic symbols for
 ubuntu/debian

Sorry, just noticed this path is out-of-date
i will rebase it


On 05/09/2018 03:36 PM, Li Zhijian wrote:
> 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@...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 <tmricht@...ux.vnet.ibm.com>
>> CC: Arnaldo Carvalho de Melo <acme@...hat.com>
>> Signed-off-by: Li Zhijian <lizhijian@...fujitsu.com>
>> ---
>>   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

-- 
Best regards.
Li Zhijian (8528)