[PATCH 23/39] perf inject: Set branch stack feature flag when synthesizing branch stacks

[Arnaldo Carvalho de Melo]

From: Adrian Hunter <adrian.hunter@xxxxxxxxx>

The branch stack feature flag is set by 'perf record' when recording
data that contains branch stacks.  Consequently, when 'perf inject'
synthesizes branch stacks, the feature flag should be set also.

Signed-off-by: Adrian Hunter <adrian.hunter@xxxxxxxxx>
Cc: Jiri Olsa <jolsa@xxxxxxxxxx>
Link: http://lkml.kernel.org/r/1443186956-18718-13-git-send-email-adrian.hunter@xxxxxxxxx
Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
---
 tools/perf/builtin-inject.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/tools/perf/builtin-inject.c b/tools/perf/builtin-inject.c
index f62c49b35be0..8638fad8a085 100644
--- a/tools/perf/builtin-inject.c
+++ b/tools/perf/builtin-inject.c
@@ -537,9 +537,13 @@ static int __cmd_inject(struct perf_inject *inject)
 		 * The AUX areas have been removed and replaced with
 		 * synthesized hardware events, so clear the feature flag.
 		 */
-		if (inject->itrace_synth_opts.set)
+		if (inject->itrace_synth_opts.set) {
 			perf_header__clear_feat(&session->header,
 						HEADER_AUXTRACE);
+			if (inject->itrace_synth_opts.last_branch)
+				perf_header__set_feat(&session->header,
+						      HEADER_BRANCH_STACK);
+		}
 		session->header.data_offset = output_data_offset;
 		session->header.data_size = inject->bytes_written;
 		perf_session__write_header(session, session->evlist, fd, true);
-- 
2.1.0

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