linux-kernel - Re: [RFC] Don't print sample_type bits in non-group events not set in the group's was Re: [PATCH] perf, script: Fix crash with printing mixed trace point and other events

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Date:   Fri, 18 Jan 2019 08:11:42 -0800
From:   Andi Kleen <andi@...stfloor.org>
To:     Jiri Olsa <jolsa@...hat.com>
Cc:     Arnaldo Carvalho de Melo <acme@...nel.org>,
        Jiri Olsa <jolsa@...nel.org>, Andi Kleen <andi@...stfloor.org>,
        Namhyung Kim <namhyung@...nel.org>,
        David Ahern <dsahern@...il.com>, linux-kernel@...r.kernel.org,
        Andi Kleen <ak@...ux.intel.com>
Subject: Re: [RFC] Don't print sample_type bits in non-group events not set
 in the group's was Re: [PATCH] perf, script: Fix crash with printing mixed
 trace point and other events

> +static bool perf_evsel__should_skip(struct perf_evsel *evsel)
> +{
> +	struct perf_event_attr *attr = &evsel->attr;
> +	struct perf_evsel *leader = evsel->leader;
> +
> +	return (leader != evsel) && !attr->freq && !attr->sample_freq;
> +}
> +
>  static int process_sample_event(struct perf_tool *tool,
>  				union perf_event *event,
>  				struct perf_sample *sample,
> @@ -1934,6 +1942,9 @@ static int process_sample_event(struct perf_tool *tool,
>  	struct perf_script *scr = container_of(tool, struct perf_script, tool);
>  	struct addr_location al;
>  
> +	if (perf_evsel__should_skip(evsel))
> +		return 0;

That just skips, but surely it has to be displayed somewhere?

-Andi