NDLI: Finding deep compiler bugs via guided stochastic program mutation

Content Provider	ACM Digital Library
Author	Sun, Chengnian Su, Zhendong Le, Vu
Abstract	Compiler testing is important and challenging. Equivalence Modulo Inputs (EMI) is a recent promising approach for compiler validation. It is based on mutating the unexecuted statements of an existing program under some inputs to produce new equivalent test programs w.r.t. these inputs. Orion is a simple realization of EMI by only randomly deleting unexecuted statements. Despite its success in finding many bugs in production compilers, Orion’s effectiveness is still limited by its simple, blind mutation strategy. To more effectively realize EMI, this paper introduces a guided, advanced mutation strategy based on Bayesian optimization. Our goal is to generate diverse programs to more thoroughly exercise compilers. We achieve this with two techniques: (1) the support of both code deletions and insertions in the unexecuted regions, leading to a much larger test program space; and (2) the use of an objective function that promotes control-flow-diverse programs for guiding Markov Chain Monte Carlo (MCMC) optimization to explore the search space. Our technique helps discover deep bugs that require elaborate mutations. Our realization, Athena, targets C compilers. In 19 months, Athena has found 72 new bugs — many of which are deep and important bugs — in GCC and LLVM. Developers have confirmed all 72 bugs and fixed 68 of them.
Starting Page	386
Ending Page	399
Page Count	14
File Format	PDF
ISSN	03621340 15581160
DOI	10.1145/2858965.2814319
Journal	ACM SIGPLAN Notices (SIGP)
Volume Number	50
Issue Number	10
Language	English
Publisher	Association for Computing Machinery (ACM)
Publisher Date	1983-05-01
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Markov chain monte carlo Compiler testing Equivalent program variants Automated testing
Content Type	Text
Resource Type	Article
Subject	Computer Graphics and Computer-Aided Design Software

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