linux-kernel - Re: [PATCH v2 09/43] perf stat: Avoid segv on counter->name

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Date:   Fri, 28 Apr 2023 22:20:20 -0300
From:   Arnaldo Carvalho de Melo <acme@...nel.org>
To:     Ian Rogers <irogers@...gle.com>
Cc:     Kan Liang <kan.liang@...ux.intel.com>,
        Ahmad Yasin <ahmad.yasin@...el.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Stephane Eranian <eranian@...gle.com>,
        Andi Kleen <ak@...ux.intel.com>,
        Perry Taylor <perry.taylor@...el.com>,
        Samantha Alt <samantha.alt@...el.com>,
        Caleb Biggers <caleb.biggers@...el.com>,
        Weilin Wang <weilin.wang@...el.com>,
        Edward Baker <edward.baker@...el.com>,
        Mark Rutland <mark.rutland@....com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Jiri Olsa <jolsa@...nel.org>,
        Namhyung Kim <namhyung@...nel.org>,
        Adrian Hunter <adrian.hunter@...el.com>,
        Florian Fischer <florian.fischer@...q.space>,
        Rob Herring <robh@...nel.org>,
        Zhengjun Xing <zhengjun.xing@...ux.intel.com>,
        John Garry <john.g.garry@...cle.com>,
        Kajol Jain <kjain@...ux.ibm.com>,
        Sumanth Korikkar <sumanthk@...ux.ibm.com>,
        Thomas Richter <tmricht@...ux.ibm.com>,
        Tiezhu Yang <yangtiezhu@...ngson.cn>,
        Ravi Bangoria <ravi.bangoria@....com>,
        Leo Yan <leo.yan@...aro.org>,
        Yang Jihong <yangjihong1@...wei.com>,
        James Clark <james.clark@....com>,
        Suzuki Poulouse <suzuki.poulose@....com>,
        Kang Minchul <tegongkang@...il.com>,
        Athira Rajeev <atrajeev@...ux.vnet.ibm.com>,
        linux-perf-users@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 09/43] perf stat: Avoid segv on counter->name

Em Fri, Apr 28, 2023 at 12:37:35AM -0700, Ian Rogers escreveu:
> Switch to use evsel__name that doesn't return NULL for hardware and
> similar events.
> 
> Reviewed-by: Kan Liang <kan.liang@...ux.intel.com>
> Signed-off-by: Ian Rogers <irogers@...gle.com>

Thanks, applied.

- Arnaldo

> ---
>  tools/perf/util/stat-display.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/tools/perf/util/stat-display.c b/tools/perf/util/stat-display.c
> index df6337f2480b..7aa7e16fa7c4 100644
> --- a/tools/perf/util/stat-display.c
> +++ b/tools/perf/util/stat-display.c
> @@ -748,7 +748,7 @@ static void uniquify_event_name(struct evsel *counter)
>  	int ret = 0;
>  
>  	if (counter->uniquified_name || counter->use_config_name ||
> -	    !counter->pmu_name || !strncmp(counter->name, counter->pmu_name,
> +	    !counter->pmu_name || !strncmp(evsel__name(counter), counter->pmu_name,
>  					   strlen(counter->pmu_name)))
>  		return;
>  
> -- 
> 2.40.1.495.gc816e09b53d-goog
> 

-- 

- Arnaldo