#include <lttng/event-notifier-notification.h>
/*
- * FIXME: this probably too low but it needs to be below 1024 bytes to avoid
- * the frame to be larger than the 1024 limit enforced by the kernel.
+ * The capture buffer size needs to be below 1024 bytes to avoid the
+ * frame to be larger than the 1024 limit enforced by the kernel. If we
+ * ever need to increase it, we will need to use a memory allocation
+ * scheme which allows allocating temporary memory chunks from the
+ * instrumentation sites. This could be done by adapting lttng
+ * tp-mempool to become nmi-safe and lock-free.
*/
#define CAPTURE_BUFFER_SIZE 512
return ret;
}
+static
+void record_error(struct lttng_event_notifier *event_notifier)
+{
+
+ struct lttng_event_notifier_group *event_notifier_group = event_notifier->group;
+ size_t dimension_index[1];
+ int ret;
+
+ 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);
+ if (ret)
+ WARN_ON_ONCE(1);
+}
+
static
void notification_send(struct lttng_event_notifier_notification *notif,
struct lttng_event_notifier *event_notifier)
lttng_alignof(kernel_notif), -1);
ret = event_notifier_group->ops->event_reserve(&ctx, 0);
if (ret < 0) {
- //TODO: error handling with counter maps
- //silently drop for now.
- WARN_ON_ONCE(1);
+ record_error(event_notifier);
return;
}