linux-kernel - Re: [PATCH] perf script report: fix segfault when using DWARF mode

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Date:   Mon, 6 Apr 2020 09:59:15 -0300
From:   Arnaldo Carvalho de Melo <arnaldo.melo@...il.com>
To:     Andreas Gerstmayr <agerstmayr@...hat.com>
Cc:     Arnaldo Carvalho de Melo <arnaldo.melo@...il.com>,
        Kim Phillips <kim.phillips@....com>,
        linux-perf-users@...r.kernel.org,
        Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Mark Rutland <mark.rutland@....com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Jiri Olsa <jolsa@...hat.com>,
        Namhyung Kim <namhyung@...nel.org>,
        Adrian Hunter <adrian.hunter@...el.com>,
        "Steven Rostedt (VMware)" <rostedt@...dmis.org>,
        Kan Liang <kan.liang@...ux.intel.com>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] perf script report: fix segfault when using DWARF mode

Em Mon, Apr 06, 2020 at 11:30:23AM +0200, Andreas Gerstmayr escreveu:
> On 03.04.20 15:16, Andreas Gerstmayr wrote:
> > On 03.04.20 14:40, Arnaldo Carvalho de Melo wrote:
> > > Em Thu, Apr 02, 2020 at 02:07:51PM -0500, Kim Phillips escreveu:
> > > > On 4/2/20 7:54 AM, Andreas Gerstmayr wrote:
> > > > > When running perf script report with a Python script and a callgraph in
> > > > > DWARF mode, intr_regs->regs can be 0 and therefore crashing
> > > > > the regs_map
> > > > > function.

> > > > > Added a check for this condition (same check as in
> > > > > builtin-script.c:595).

> > > > > Signed-off-by: Andreas Gerstmayr <agerstmayr@...hat.com>

> > > > Tested-by: Kim Phillips <kim.phillips@....com>

> > > Thanks, added this to that patch.

> > Great, thanks!
 
> Ah, I thought you were referring to my initial flamegraph.py perf script.
> Is there anything I can do to get it merged?

I'll test it today, were there any Tested-by: or Reviewed-by: to that
flamegraph.py?

That is not yet a strict requirement for having patches accepted, but
help me a lot in dedicating time to test things that passed thru some
testing by other people,

Thanks,

- Arnaldo