linux-kernel - Re: [PATCH] perf test: Adapt test case record+probe_libc_inet

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Date:   Thu, 26 Apr 2018 10:09:00 +0200
From:   Thomas-Mich Richter <tmricht@...ux.ibm.com>
To:     Martin Vuille <jpmv27@....com>,
        Arnaldo Carvalho de Melo <acme@...nel.org>
Cc:     linux-kernel@...r.kernel.org, linux-perf-users@...r.kernel.org,
        brueckner@...ux.vnet.ibm.com, schwidefsky@...ibm.com,
        heiko.carstens@...ibm.com
Subject: Re: [PATCH] perf test: Adapt test case record+probe_libc_inet_pton.sh
 for s390

On 04/25/2018 04:19 PM, Martin Vuille wrote:
> Apologies for any problems my patch may be causing.
> 
> I'm unclear on what is the proposed fix, other than reverting the commit.
> 
> In the problem scenario, is a --symfs option used? Is the debug info being obtained from the symfs directory?
> 
> Unfortunately, I've had to change my focus for the time being, so won't be able to investigate further for a while.
> 
> Arnaldo, I'm fine with you reverting this change for now.
> 
> Regards,
> 
> MV
> 
> 

Martin,

there is no need to revert the patch. I have adopted the test case for s390 and it
now stops at main, which is identical to x86.

The --symfs option was not used, however the debug file selected for dwarf examination
was different. With you patch it changed from /usr/lib64/libc.so (old) to
/usr/lib/debug/lib64/libc-2.26.so.debug (new)
and I think that this file has not all the info (at least on s390).

-- 
Thomas Richter, Dept 3303, IBM s390 Linux Development, Boeblingen, Germany
--
Vorsitzende des Aufsichtsrats: Martina Koederitz 
Geschäftsführung: Dirk Wittkopp
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