linux-kernel - Re: perf report: fix off-by-one for non-activation frames

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Message-ID: <20170617080402.GA1402@host1.jankratochvil.net>
Date:   Sat, 17 Jun 2017 10:04:02 +0200
From:   Jan Kratochvil <jan.kratochvil@...hat.com>
To:     Namhyung Kim <namhyung@...nel.org>
Cc:     Milian Wolff <milian.wolff@...b.com>,
        "linux-kernel@...r.kernel.org" <Linux-kernel@...r.kernel.org>,
        linux-perf-users <linux-perf-users@...r.kernel.org>,
        Arnaldo Carvalho de Melo <acme@...hat.com>,
        David Ahern <dsahern@...il.com>,
        Peter Zijlstra <a.p.zijlstra@...llo.nl>,
        Yao Jin <yao.jin@...ux.intel.com>, Jiri Olsa <jolsa@...hat.com>
Subject: Re: perf report: fix off-by-one for non-activation frames

On Sat, 17 Jun 2017 09:56:57 +0200, Namhyung Kim wrote:
> Not sure whether it needs be fixed or not.  If we fix it, srcline and
> address would not match so it can give its own confusion to users.
> Ideally it should display an addressof the instruction before the
> address IMHO.

One can figure million ways how it can behave and each one has its pros and
cons.  I was just describing the current behavior of GDB and LLDB which people
are used to already.


Jan