linux-kernel - Re: [PATCH v2 2/4] perf tools: Prompt error message for wrong terms of hw/sw events

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Message-ID: <20150927203016.GG24007@krava.redhat.com>
Date:	Sun, 27 Sep 2015 22:30:16 +0200
From:	Jiri Olsa <jolsa@...hat.com>
To:	He Kuang <hekuang@...wei.com>
Cc:	a.p.zijlstra@...llo.nl, mingo@...hat.com, acme@...nel.org,
	jolsa@...nel.org, kan.liang@...el.com, adrian.hunter@...el.com,
	wangnan0@...wei.com, pi3orama@....com, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 2/4] perf tools: Prompt error message for wrong terms
 of hw/sw events

On Fri, Sep 25, 2015 at 11:11:49AM +0000, He Kuang wrote:

SNIP

> --- a/tools/perf/util/parse-events.c
> +++ b/tools/perf/util/parse-events.c
> @@ -656,6 +656,9 @@ do {									   \
>  		CHECK_TYPE_VAL(STR);
>  		break;
>  	default:
> +		err->str = strdup("unknown term");
> +		err->idx = term->err_term;
> +		err->help = parse_events_formats_error_string(NULL);
>  		return -EINVAL;
>  	}
>  
> @@ -1875,3 +1878,26 @@ void parse_events_evlist_error(struct parse_events_evlist *data,
>  	err->str = strdup(str);
>  	WARN_ONCE(!err->str, "WARNING: failed to allocate error string");
>  }
> +
> +char *parse_events_formats_error_string(char *additional_terms)
> +{
> +	char *str;
> +	static const char *static_terms = "config,config1,config2,name,"
> +					  "period,freq,branch_type,time,"
> +					  "call-graph,stack-size\n";
> +
> +	/* valid terms */
> +	if (additional_terms) {
> +		if (!asprintf(&str, "valid terms: %s,%s",
> +			      additional_terms, static_terms))
> +			goto fail;
> +		free(additional_terms);

not excited about freeing the additional_terms arg in here,
please state it in the comment above the function

thanks,
jirka
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