+ free(provider_name);
+ free(ctx_name);
+ provider_name = ctx_name = NULL;
+ } while (bytecode_symbol_iterator_next(it) == 0);
+end:
+ free(provider_name);
+ free(ctx_name);
+ bytecode_symbol_iterator_destroy(it);
+ return ret;
+}
+
+/*
+ * Enable a single agent event for a given UST session.
+ *
+ * Return LTTNG_OK on success or else a LTTNG_ERR* code.
+ */
+int event_agent_enable(struct ltt_ust_session *usess,
+ struct agent *agt, struct lttng_event *event,
+ struct lttng_filter_bytecode *filter,
+ char *filter_expression)
+{
+ int ret, created = 0;
+ struct agent_event *aevent;
+
+ assert(usess);
+ assert(event);
+ assert(agt);
+
+ DBG("Event agent enabling %s for session %" PRIu64 " with loglevel type %d "
+ ", loglevel %d and filter \"%s\"", event->name,
+ usess->id, event->loglevel_type, event->loglevel,
+ filter_expression ? filter_expression : "NULL");
+
+ aevent = agent_find_event(event->name, event->loglevel_type,
+ event->loglevel, filter_expression, agt);
+ if (!aevent) {
+ aevent = agent_create_event(event->name, event->loglevel_type,
+ event->loglevel, filter,
+ filter_expression);
+ if (!aevent) {
+ ret = LTTNG_ERR_NOMEM;
+ goto error;