ret = ustctl_create_session(app->key.sock);
if (ret < 0) {
ERR("Creating session for app pid %d", app->key.pid);
+ /* This means that the tracer is gone... */
+ ua_sess = (void*) -1UL;
goto error;
}
*/
ua_sess = create_ust_app_session(usess, app);
if (ua_sess == NULL) {
- /* Major problem here and it's maybe the tracer or malloc() */
+ /* The malloc() failed. */
goto error;
+ } else if (ua_sess == (void *) -1UL) {
+ /* The application's socket is not valid. Contiuing */
+ continue;
}
/* Create channel onto application */
goto skip_setup;
}
+ /* Indicate that the session has been started once */
+ ua_sess->started = 1;
+
ret = create_ust_app_metadata(ua_sess, usess->pathname, app);
if (ret < 0) {
goto error_rcu_unlock;
if (ret < 0) {
goto error_rcu_unlock;
}
- ua_sess->started = 1;
skip_setup:
/* This start the UST tracing */
goto error_rcu_unlock;
}
- /* Not started, continuing. */
- if (ua_sess->started == 0) {
- goto end;
- }
+ /*
+ * If started = 0, it means that stop trace has been called for a session
+ * that was never started. This is a code flow error and should never
+ * happen.
+ */
+ assert(ua_sess->started == 1);
/* This inhibits UST tracing */
ret = ustctl_stop_session(app->key.sock, ua_sess->handle);
ret);
}
- ua_sess->started = 0;
-
end:
rcu_read_unlock();
return 0;