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perf tools: Add kernel AUX area sampling definitions

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Add kernel AUX area sampling definitions, which brings perf_event.h into
line with the kernel version.

New sample type PERF_SAMPLE_AUX requests a sample of the AUX area
buffer.  New perf_event_attr member 'aux_sample_size' specifies the
desired size of the sample.

Also add support for parsing samples containing AUX area data i.e.
PERF_SAMPLE_AUX.

Committer notes:

I squashed the first two patches in this series to avoid breaking
automatic bisection, i.e. after applying only the original first patch
in this series we would have:

  # perf test -v parsing
  26: Sample parsing                                        :
  --- start ---
  test child forked, pid 17018
  sample format has changed, some new PERF_SAMPLE_ bit was introduced - test needs updating
  test child finished with -1
  ---- end ----
  Sample parsing: FAILED!
  #

With the two paches combined:

  # perf test parsing
  26: Sample parsing                                        : Ok
  #

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Link: http://lore.kernel.org/lkml/20191115124225.5247-3-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Adrian Hunter
2019-11-15 14:42:11 +02:00
committed by Arnaldo Carvalho de Melo
parent 848a5e507e
commit 98dcf14d7f
9 changed files with 59 additions and 6 deletions
Download Patch File Download Diff File Expand all files Collapse all files

13
tools/perf/util/evsel.c
View File

@@ -2209,6 +2209,19 @@ int perf_evsel__parse_sample(struct evsel *evsel, union perf_event *event,
array++;
}
if (type & PERF_SAMPLE_AUX) {
OVERFLOW_CHECK_u64(array);
sz = *array++;
OVERFLOW_CHECK(array, sz, max_size);
/* Undo swap of data */
if (swapped)
mem_bswap_64((char *)array, sz);
data->aux_sample.size = sz;
data->aux_sample.data = (char *)array;
array = (void *)array + sz;
}
return 0;
}