From: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Date: Fri, 24 Jun 2011 03:28:52 +0000 (-0400)
Subject: Add check for perf counter
X-Git-Tag: v2.0-pre1~33
X-Git-Url: https://git.lttng.org./?a=commitdiff_plain;h=54de85a41d9c61aaf1a3fd2ad6dc01d01ccb4360;p=lttng-modules.git

Add check for perf counter

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
---

diff --git a/lttng-context-perf-counters.c b/lttng-context-perf-counters.c
index 56e0d250..c6f73037 100644
--- a/lttng-context-perf-counters.c
+++ b/lttng-context-perf-counters.c
@@ -36,7 +36,7 @@ void perf_counter_record(struct lttng_ctx_field *field,
 	uint64_t value;
 
 	event = field->u.perf_counter.e[ctx->cpu];
-	if (likely(event)) {
+	if (likely(event) && likely(event->pmu)) {
 		event->pmu->read(event);
 		value = local64_read(&event->count);
 	} else {