linux-kernel - Re: [PATCH v2 1/5] perf tools: Fix segfault when using -s trace

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Date:	Wed, 6 Jan 2016 08:39:01 +0900
From:	Namhyung Kim <namhyung@...nel.org>
To:	Arnaldo Carvalho de Melo <acme@...nel.org>
CC:	Ingo Molnar <mingo@...nel.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Jiri Olsa <jolsa@...nel.org>,
	LKML <linux-kernel@...r.kernel.org>,
	David Ahern <dsahern@...il.com>,
	Steven Rostedt <rostedt@...dmis.org>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Andi Kleen <andi@...stfloor.org>,
	Wang Nan <wangnan0@...wei.com>
Subject: Re: [PATCH v2 1/5] perf tools: Fix segfault when using -s
 trace_fields

On Tue, Jan 05, 2016 at 06:50:02PM -0300, Arnaldo Carvalho de Melo wrote:
> Em Tue, Jan 05, 2016 at 07:58:34PM +0900, Namhyung Kim escreveu:
> > When the 'trace_fields' sort key is used explicitly for non-tracepoint
> > events, it'll get segfault since it assumed evsel->tp_format was set.
> > Skip those events in add_all_dynamic_fields().
> > 
> > Acked-by: Jiri Olsa <jolsa@...nel.org>
> > Signed-off-by: Namhyung Kim <namhyung@...nel.org>
> 
> Merged with the patch introducing this problem, that I hadn't sent to
> Ingo,

Thanks for doing that!
Namhyung


> 
> > ---
> >  tools/perf/util/sort.c | 3 +++
> >  1 file changed, 3 insertions(+)
> > 
> > diff --git a/tools/perf/util/sort.c b/tools/perf/util/sort.c
> > index e558e87cafaf..59c4c8586d79 100644
> > --- a/tools/perf/util/sort.c
> > +++ b/tools/perf/util/sort.c
> > @@ -1955,6 +1955,9 @@ static int add_all_dynamic_fields(struct perf_evlist *evlist, bool raw_trace)
> >  	struct perf_evsel *evsel;
> >  
> >  	evlist__for_each(evlist, evsel) {
> > +		if (evsel->attr.type != PERF_TYPE_TRACEPOINT)
> > +			continue;
> > +
> >  		ret = add_evsel_fields(evsel, raw_trace);
> >  		if (ret < 0)
> >  			return ret;
> > -- 
> > 2.6.4
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