linux-kernel - Re: [PATCH v4] perf report: Fix regression when decoding intelPT traces

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: Windows password security audit tool. GUI, reports in PDF.

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

Message-ID: <20180118162950.GH18383@kernel.org>
Date:   Thu, 18 Jan 2018 13:29:50 -0300
From:   Arnaldo Carvalho de Melo <acme@...nel.org>
To:     Adrian Hunter <adrian.hunter@...el.com>
Cc:     Mathieu Poirier <mathieu.poirier@...aro.org>, jolsa@...hat.com,
        peterz@...radead.org, mingo@...hat.com,
        alexander.shishkin@...ux.intel.com, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4] perf report: Fix regression when decoding intelPT
 traces

Em Wed, Jan 10, 2018 at 01:31:52PM -0700, Mathieu Poirier escreveu:
> Commit (93d10af26bb7 perf tools: Optimize sample parsing for ordered
> events) breaks intelPT trace decoding by invariably returning an error if
> the event type isn't a PERF_SAMPLE_TIME.

Adrian, have you had the chance of looking at this?

I'm tentatively applying with Jiri's ack.

- Arnaldo
 
> With this patch the timestamp is initialised and processing is allowed to
> continue if the error returned by function
> perf_evlist__parse_sample_timestamp() is not a fault.
> 
> Signed-off-by: Mathieu Poirier <mathieu.poirier@...aro.org>
> Acked-by: Jiri Olsa <jolsa@...hat.com>
> ---
> Changes for v4:
> - Rebased to latest perf/core branch
> - Added Jiri's ACK
> ---
>  tools/perf/util/session.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/tools/perf/util/session.c b/tools/perf/util/session.c
> index 54e30f1bcbd7..07221884f725 100644
> --- a/tools/perf/util/session.c
> +++ b/tools/perf/util/session.c
> @@ -1508,10 +1508,10 @@ static s64 perf_session__process_event(struct perf_session *session,
>  		return perf_session__process_user_event(session, event, file_offset);
>  
>  	if (tool->ordered_events) {
> -		u64 timestamp;
> +		u64 timestamp = -1ULL;
>  
>  		ret = perf_evlist__parse_sample_timestamp(evlist, event, &timestamp);
> -		if (ret)
> +		if (ret && ret != -1)
>  			return ret;
>  
>  		ret = perf_session__queue_event(session, event, timestamp, file_offset);
> -- 
> 2.7.4