Practical AJAX race detection for JavaScript web applications

Abstract

Asynchronous client-server communication is a common source of errors in JavaScript web applications. Such errors are difficult to detect using ordinary testing because of the nondeterministic scheduling of AJAX events. Existing automated event race detectors are generally too imprecise or too inefficient to be practically useful. To address this problem, we present a new approach based on a lightweight combination of dynamic analysis and controlled execution that directly targets identification of harmful AJAX event races.