linux-kernel - [PATCH 09/25] perf report: Adjust sample type validation for synthesized branch stacks

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Date:	Fri, 25 Sep 2015 16:15:40 +0300
From:	Adrian Hunter <adrian.hunter@...el.com>
To:	Arnaldo Carvalho de Melo <acme@...nel.org>
Cc:	Jiri Olsa <jolsa@...hat.com>, linux-kernel@...r.kernel.org
Subject: [PATCH 09/25] perf report: Adjust sample type validation for synthesized branch stacks

perf report looks at event sample types to determine if branch stacks have
been sampled.  Adjust the validation to know about instruction tracing
options.

This change allows the use of the -b option which otherwise would complain
with an error like:

	Error:
	Selected -b but no branch data. Did you call perf record without -b?
	# To display the perf.data header info,
	# please use --header/--header-only options.
	#

Signed-off-by: Adrian Hunter <adrian.hunter@...el.com>
---
 tools/perf/builtin-report.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/tools/perf/builtin-report.c b/tools/perf/builtin-report.c
index 0d53b485a87b..7af35af5a5e5 100644
--- a/tools/perf/builtin-report.c
+++ b/tools/perf/builtin-report.c
@@ -220,6 +220,9 @@ static int report__setup_sample_type(struct report *rep)
 	     !session->itrace_synth_opts->set))
 		sample_type |= PERF_SAMPLE_CALLCHAIN;
 
+	if (session->itrace_synth_opts->last_branch)
+		sample_type |= PERF_SAMPLE_BRANCH_STACK;
+
 	if (!is_pipe && !(sample_type & PERF_SAMPLE_CALLCHAIN)) {
 		if (sort__has_parent) {
 			ui__error("Selected --sort parent, but no "
-- 
1.9.1

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