{
struct lttng_event_notifier_group *event_notifier_group =
event_notifier->group;
+ struct lttng_counter *error_counter;
size_t dimension_index[1];
int ret;
+ error_counter = CMM_LOAD_SHARED(event_notifier_group->error_counter);
+ /*
+ * load-acquire paired with store-release orders creation of the
+ * error counter and setting error_counter_len before the
+ * error_counter is used.
+ * Currently a full memory barrier is used, which could be
+ * turned into acquire-release barriers.
+ */
+ cmm_smp_mb();
+ /* This group may not have an error counter attached to it. */
+ if (!error_counter)
+ return;
+
dimension_index[0] = event_notifier->error_counter_index;
ret = event_notifier_group->error_counter->ops->counter_add(
- event_notifier_group->error_counter->counter,
- dimension_index, 1);
+ error_counter->counter, dimension_index, 1);
if (ret)
WARN_ON_ONCE(1);
}
ssize_t ret;
size_t content_len;
int iovec_count = 1;
- struct lttng_ust_event_notifier_notification ust_notif;
+ struct lttng_ust_event_notifier_notification ust_notif = {0};
struct iovec iov[2];
assert(notif);