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

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Message-ID: <20160105091612.GE2192@krava.brq.redhat.com>
Date:	Tue, 5 Jan 2016 10:16:12 +0100
From:	Jiri Olsa <jolsa@...hat.com>
To:	Namhyung Kim <namhyung@...nel.org>
Cc:	Arnaldo Carvalho de Melo <acme@...nel.org>,
	Ingo Molnar <mingo@...nel.org>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	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 1/5] perf tools: Fix segfault when using -s trace_fields

On Tue, Jan 05, 2016 at 12:03:43PM +0900, Namhyung Kim wrote:
> 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>

thanks,
jirka

> 
> Signed-off-by: Namhyung Kim <namhyung@...nel.org>
> ---
>  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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