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SubjectRe: [PATCH 3/7] perf: add ability to change event according to sample (v2)
Em Mon, Nov 28, 2011 at 12:03:31PM +0300, Andrew Vagin escreveu:
> It's opposition of perf_session__parse_sample.
>
> v2: fixed mistakes which David Arhen found

Ok, I'm taking this one, David, can I added an 'Acked-by: you"? Or even
"reviewed-by:" ?

I'm just changing 'data' to 'sample', data is way to vague, I kept it
for a while in the past just to reduce patch size, but this is something
completely new, so better use 'sample'.

- Arnaldo

> Signed-off-by: Andrew Vagin <avagin@openvz.org>
> ---
> tools/perf/util/event.h | 2 +
> tools/perf/util/evsel.c | 74 +++++++++++++++++++++++++++++++++++++++++++++
> tools/perf/util/session.h | 9 +++++
> 3 files changed, 85 insertions(+), 0 deletions(-)
>
> diff --git a/tools/perf/util/event.h b/tools/perf/util/event.h
> index 357a85b..0493101 100644
> --- a/tools/perf/util/event.h
> +++ b/tools/perf/util/event.h
> @@ -187,5 +187,7 @@ const char *perf_event__name(unsigned int id);
> int perf_event__parse_sample(const union perf_event *event, u64 type,
> int sample_size, bool sample_id_all,
> struct perf_sample *sample, bool swapped);
> +int perf_event__change_sample(union perf_event *event, u64 type,
> + const struct perf_sample *data, bool swapped);
>
> #endif /* __PERF_RECORD_H */
> diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c
> index e426264..d697568 100644
> --- a/tools/perf/util/evsel.c
> +++ b/tools/perf/util/evsel.c
> @@ -494,3 +494,77 @@ int perf_event__parse_sample(const union perf_event *event, u64 type,
>
> return 0;
> }
> +
> +int perf_event__change_sample(union perf_event *event, u64 type,
> + const struct perf_sample *data, bool swapped)
> +{
> + u64 *array;
> +
> + /*
> + * used for cross-endian analysis. See git commit 65014ab3
> + * for why this goofiness is needed.
> + */
> + union {
> + u64 val64;
> + u32 val32[2];
> + } u;
> +
> + array = event->sample.array;
> +
> + if (type & PERF_SAMPLE_IP) {
> + event->ip.ip = data->ip;
> + array++;
> + }
> +
> + if (type & PERF_SAMPLE_TID) {
> + u.val32[0] = data->pid;
> + u.val32[1] = data->tid;
> + if (swapped) {
> + /* undo swap of u64, then swap on individual u32s */
> + u.val32[0] = bswap_32(u.val32[0]);
> + u.val32[1] = bswap_32(u.val32[1]);
> + u.val64 = bswap_64(u.val64);
> + }
> +
> + *array = u.val64;
> + array++;
> + }
> +
> + if (type & PERF_SAMPLE_TIME) {
> + *array = data->time;
> + array++;
> + }
> +
> + if (type & PERF_SAMPLE_ADDR) {
> + *array = data->addr;
> + array++;
> + }
> +
> + if (type & PERF_SAMPLE_ID) {
> + *array = data->id;
> + array++;
> + }
> +
> + if (type & PERF_SAMPLE_STREAM_ID) {
> + *array = data->stream_id;
> + array++;
> + }
> +
> + if (type & PERF_SAMPLE_CPU) {
> + u.val32[0] = data->cpu;
> + if (swapped) {
> + /* undo swap of u64, then swap on individual u32s */
> + u.val32[0] = bswap_32(u.val32[0]);
> + u.val64 = bswap_64(u.val64);
> + }
> + *array = u.val64;
> + array++;
> + }
> +
> + if (type & PERF_SAMPLE_PERIOD) {
> + *array = data->period;
> + array++;
> + }
> +
> + return 0;
> +}
> diff --git a/tools/perf/util/session.h b/tools/perf/util/session.h
> index 6e393c9..444f121 100644
> --- a/tools/perf/util/session.h
> +++ b/tools/perf/util/session.h
> @@ -167,6 +167,15 @@ static inline int perf_session__parse_sample(struct perf_session *session,
> session->header.needs_swap);
> }
>
> +static inline int perf_session__change_sample(struct perf_session *session,
> + union perf_event *event,
> + const struct perf_sample *sample)
> +{
> + return perf_event__change_sample(event, session->sample_type,
> + sample,
> + session->header.needs_swap);
> +}
> +
> struct perf_evsel *perf_session__find_first_evtype(struct perf_session *session,
> unsigned int type);
>
> --
> 1.7.1


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