[PATCH V8 4/7] perf,tools: fix dump_sample crash when evsel is NULL.

[kan . liang]

From: Kan Liang <kan.liang@xxxxxxxxx>

Need to check evsel before using in dump_sample.

Signed-off-by: Kan Liang <kan.liang@xxxxxxxxx>
---
 tools/perf/util/session.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/perf/util/session.c b/tools/perf/util/session.c
index 61669be..23fed17 100644
--- a/tools/perf/util/session.c
+++ b/tools/perf/util/session.c
@@ -1080,11 +1080,11 @@ static int machines__deliver_event(struct machines *machines,
 
 	switch (event->header.type) {
 	case PERF_RECORD_SAMPLE:
-		dump_sample(evsel, event, sample);
 		if (evsel == NULL) {
 			++evlist->stats.nr_unknown_id;
 			return 0;
 		}
+		dump_sample(evsel, event, sample);
 		if (machine == NULL) {
 			++evlist->stats.nr_unprocessable_samples;
 			return 0;
-- 
1.8.3.1

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