+ ret_code = trigger_modifies_event_notifier(trigger, &must_update_event_notifiers);
+ if (ret_code != LTTNG_OK) {
+ ERR("Failed to determine if event modifies event notifiers: trigger name = '%s', trigger owner uid = %d, error code = %d",
+ trigger_name, (int) trigger_owner, ret_code);
+ goto end;
+ }
+
+ ret_code = notification_thread_command_unregister_trigger(notification_thread,
+ trigger);
+ if (ret_code != LTTNG_OK) {
+ DBG("Failed to unregister trigger from notification thread: trigger name = '%s', trigger owner uid = %d, error code = %d",
+ trigger_name, (int) trigger_owner, ret_code);
+ }
+
+ /*
+ * Synchronize tracers if the trigger removes an event notifier.
+ * Do this even if the trigger unregistration failed to at least stop
+ * the tracers from producing notifications associated with this
+ * event notifier.
+ */
+ if (must_update_event_notifiers) {
+ const enum lttng_domain_type trigger_domain =
+ lttng_trigger_get_underlying_domain_type_restriction(
+ trigger);
+
+ session_lock_list();
+ switch (trigger_domain) {
+ case LTTNG_DOMAIN_KERNEL:
+ {
+ ret_code = kernel_unregister_event_notifier(
+ trigger);
+ break;
+ }
+ case LTTNG_DOMAIN_UST:
+ ust_app_global_update_all_event_notifier_rules();
+ break;
+ case LTTNG_DOMAIN_NONE:
+ abort();
+ default:
+ {
+ /* Agent domains. */
+ struct agent *agt = agent_find_by_event_notifier_domain(
+ trigger_domain);
+
+ if (!agt) {
+ agt = agent_create(trigger_domain);
+ if (!agt) {
+ ret_code = LTTNG_ERR_NOMEM;
+ goto end_unlock_session_list;
+ }
+ agent_add(agt, trigger_agents_ht_by_domain);
+ }
+
+ ret_code = trigger_agent_disable(trigger, agt);
+ if (ret_code != LTTNG_OK) {
+ goto end_unlock_session_list;
+ }
+
+ break;
+ }
+ }
+
+ session_unlock_list();
+ }
+