Thu 8 Nov 2018 15:30 - 15:52 at Studio 2 - Potpourri Chair(s): Anders Møller

Natural language elements in source code, e.g., the names of variables and functions, convey useful information. However, most existing bug detection tools ignore this information and therefore miss some classes of bugs. The few existing name-based bug detection approaches reason about names on a syntactic level and rely on manually designed and tuned algorithms to detect bugs. This paper presents DeepBugs, a learning approach to name-based bug detection, which reasons about names based on a semantic representation and which automatically learns bug detectors instead of manually writing them. We formulate bug detection as a binary classification problem and train a classifier that distinguishes correct from incorrect code. To address the challenge that effectively learning a bug detector requires examples of both correct and incorrect code, we create likely incorrect code examples from an existing corpus of code through simple code transformations. A novel insight learned from our work is that learning from artificially seeded bugs yields bug detectors that are effective at finding bugs in real-world code. We implement our idea into a framework for learning-based and name-based bug detection. Three bug detectors built on top of the framework detect accidentally swapped function arguments, incorrect binary operators, and incorrect operands in binary operations. Applying the approach to a corpus of 150,000 JavaScript files yields bug detectors that have a high accuracy (between 89% and 95%), are very efficient (less than 20 milliseconds per analyzed file), and reveal 102 programming mistakes (with 68% true positive rate) in real-world code.

Thu 8 Nov

15:30 - 17:00: OOPSLA - Potpourri at Studio 2
Chair(s): Anders MøllerAarhus University
splash-2018-OOPSLA15:30 - 15:52
Michael PradelTU Darmstadt, Koushik SenUniversity of California, Berkeley
splash-2018-OOPSLA15:52 - 16:15
Daniel W. Barowy, Emery BergerUniversity of Massachusetts, Amherst, Benjamin ZornMicrosoft Research
splash-2018-OOPSLA16:15 - 16:37
James BornholtUniversity of Washington, Emina TorlakUniversity of Washington
splash-2018-OOPSLA16:37 - 17:00
Saswat PadhiUniversity of California, Los Angeles, Prateek JainMicrosoft Research Lab, India, Daniel PerelmanUniversity of Washington, USA, Alex PolozovMicrosoft Research, Sumit GulwaniMicrosoft Research, Todd MillsteinUniversity of California, Los Angeles