From: Adrian Hunter adrian.hunter@intel.com

Define auxtrace record alignment so that it can be referenced elsewhere.

Note this is preparation for patch "perf intel-pt: Fix overlap calculation for padding"

Signed-off-by: Adrian Hunter adrian.hunter@intel.com Cc: Jiri Olsa jolsa@redhat.com Cc: stable@vger.kernel.org Link: http://lkml.kernel.org/r/20190206103947.15750-2-adrian.hunter@intel.com Signed-off-by: Arnaldo Carvalho de Melo acme@redhat.com --- tools/perf/util/auxtrace.c | 4 ++-- tools/perf/util/auxtrace.h | 3 +++ 2 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/tools/perf/util/auxtrace.c b/tools/perf/util/auxtrace.c index 94a22cc8004c..ad186d3255d1 100644 --- a/tools/perf/util/auxtrace.c +++ b/tools/perf/util/auxtrace.c @@ -1279,9 +1279,9 @@ static int __auxtrace_mmap__read(struct perf_mmap *map, }

/* padding must be written by fn() e.g. record__process_auxtrace() */ - padding = size & 7; + padding = size & (PERF_AUXTRACE_RECORD_ALIGNMENT - 1); if (padding) - padding = 8 - padding; + padding = PERF_AUXTRACE_RECORD_ALIGNMENT - padding;

memset(&ev, 0, sizeof(ev)); ev.auxtrace.header.type = PERF_RECORD_AUXTRACE; diff --git a/tools/perf/util/auxtrace.h b/tools/perf/util/auxtrace.h index 8e50f96d4b23..fac32482db61 100644 --- a/tools/perf/util/auxtrace.h +++ b/tools/perf/util/auxtrace.h @@ -40,6 +40,9 @@ struct record_opts; struct auxtrace_info_event; struct events_stats;

+/* Auxtrace records must have the same alignment as perf event records */ +#define PERF_AUXTRACE_RECORD_ALIGNMENT 8 + enum auxtrace_type { PERF_AUXTRACE_UNKNOWN, PERF_AUXTRACE_INTEL_PT,