linux-kernel - Re: [PATCH 08/10] perf, tools: Expand PMU events by prefix match

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20161017114038.GD24552@krava>
Date:   Mon, 17 Oct 2016 13:40:38 +0200
From:   Jiri Olsa <jolsa@...hat.com>
To:     Andi Kleen <andi@...stfloor.org>
Cc:     acme@...nel.org, jolsa@...nel.org, sukadev@...ux.vnet.ibm.com,
        eranian@...gle.com, linux-kernel@...r.kernel.org,
        Andi Kleen <ak@...ux.intel.com>
Subject: Re: [PATCH 08/10] perf, tools: Expand PMU events by prefix match

On Thu, Oct 13, 2016 at 02:15:30PM -0700, Andi Kleen wrote:

SNIP

> diff --git a/tools/perf/util/parse-events.y b/tools/perf/util/parse-events.y
> index 3a5196380609..790f0dd598b9 100644
> --- a/tools/perf/util/parse-events.y
> +++ b/tools/perf/util/parse-events.y
> @@ -224,11 +224,34 @@ event_pmu:
>  PE_NAME opt_event_config
>  {
>  	struct parse_events_evlist *data = _data;
> -	struct list_head *list;
> +	struct list_head *list, *orig_terms, *terms;
> +
> +	if (parse_events_copy_term_list($2, &orig_terms))
> +		YYABORT;
>  
>  	ALLOC_LIST(list);
> -	ABORT_ON(parse_events_add_pmu(data, list, $1, $2));
> +	if (parse_events_add_pmu(data, list, $1, $2)) {
> +		struct perf_pmu *pmu = NULL;
> +		int ok = 0;
> +
> +		while ((pmu = perf_pmu__scan(pmu)) != NULL) {
> +			char *name = pmu->name;
> +
> +			if (!strncmp(name, "uncore_", 7))
> +				name += 7;

so there's a special treatment for uncore events,
what if user says 'uncore_box/..' then?


> +			if (!strncmp($1, name, strlen($1))) {
> +				if (parse_events_copy_term_list(orig_terms, &terms))
> +					YYABORT;
> +				if (!parse_events_add_pmu(data, list, pmu->name, terms))
> +					ok++;

so we're ok if some of the events is not added?
do we warn at least?

thanks,
jirka