[tip:perf/core] perf stat record: Initialize record features

[tip-bot for Jiri Olsa]

Commit-ID:  3ba78bd00e508bf46a6aa2b8e296dc8287ea4c29
Gitweb:     http://git.kernel.org/tip/3ba78bd00e508bf46a6aa2b8e296dc8287ea4c29
Author:     Jiri Olsa <jolsa@xxxxxxxxxx>
AuthorDate: Thu, 5 Nov 2015 15:40:47 +0100
Committer:  Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
CommitDate: Thu, 17 Dec 2015 15:15:17 -0300

perf stat record: Initialize record features

Disabling all non stat related features.

Also as we now enable STAT feature in the data file, adding code to
instruct session open to skip sample type checking for stat data files.

Signed-off-by: Jiri Olsa <jolsa@xxxxxxxxxx>
Tested-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
Tested-by: Kan Liang <kan.liang@xxxxxxxxx>
Cc: David Ahern <dsahern@xxxxxxxxx>
Cc: Namhyung Kim <namhyung@xxxxxxxxxx>
Cc: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx>
Link: http://lkml.kernel.org/r/1446734469-11352-4-git-send-email-jolsa@xxxxxxxxxx
Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
---
 tools/perf/builtin-stat.c | 15 +++++++++++++++
 tools/perf/util/session.c |  3 +++
 2 files changed, 18 insertions(+)

diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c
index af2a3bf..c9c896a 100644
--- a/tools/perf/builtin-stat.c
+++ b/tools/perf/builtin-stat.c
@@ -1310,6 +1310,19 @@ static const char * const recort_usage[] = {
 	NULL,
 };
 
+static void init_features(struct perf_session *session)
+{
+	int feat;
+
+	for (feat = HEADER_FIRST_FEATURE; feat < HEADER_LAST_FEATURE; feat++)
+		perf_header__set_feat(&session->header, feat);
+
+	perf_header__clear_feat(&session->header, HEADER_BUILD_ID);
+	perf_header__clear_feat(&session->header, HEADER_TRACING_DATA);
+	perf_header__clear_feat(&session->header, HEADER_BRANCH_STACK);
+	perf_header__clear_feat(&session->header, HEADER_AUXTRACE);
+}
+
 static int __cmd_record(int argc, const char **argv)
 {
 	struct perf_session *session;
@@ -1331,6 +1344,8 @@ static int __cmd_record(int argc, const char **argv)
 	if (perf_stat.file.is_pipe)
 		return -EINVAL;
 
+	init_features(session);
+
 	session->evlist   = evsel_list;
 	perf_stat.session = session;
 	perf_stat.record  = true;
diff --git a/tools/perf/util/session.c b/tools/perf/util/session.c
index a90c74b..d5636ba 100644
--- a/tools/perf/util/session.c
+++ b/tools/perf/util/session.c
@@ -37,6 +37,9 @@ static int perf_session__open(struct perf_session *session)
 	if (perf_data_file__is_pipe(file))
 		return 0;
 
+	if (perf_header__has_feat(&session->header, HEADER_STAT))
+		return 0;
+
 	if (!perf_evlist__valid_sample_type(session->evlist)) {
 		pr_err("non matching sample_type\n");
 		return -1;
--
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