The evolution of data races

Concurrency bugs are notoriously difficult to find and fix. Several prior empirical studies have identified the prevalence and challenges of concurrency bugs in open source projects, and several existing tools can be used to identify concurrency errors such as data races. However, little is known about how concurrency bugs evolve over time. In this paper, we examine the evolution of data races by analyzing samples of the committed code in two open source projects over a multi-year period. Specifically, we identify how the data races in these programs change over time.