Towards Efficient and Scalabale Omniscient Debugging for Model Transformations

Model transformations (MTs) are central artifacts in model-driven engineering (MDE) that define core operations on models. Like other software artifacts, MTs may possess defects (bugs). Some MDE tools provide support for debugging. In this paper, we describe an omniscient debugging technique. Our technique enhances stepwise execution support for MTs by providing the ability to traverse, in either direction, the execution history of a live debugging session. We also introduce a proof of concept prototype applying the described technique and a preliminary study of the scalability, in terms of memory consumption, and performance, in terms of time to execute.