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ICSE 2019
Sat 25 - Fri 31 May 2019 Montreal, QC, Canada

JVM is the cornerstone of the widely-used Java platform. Thus, it is critical to ensure the reliability and robustness of popular JVM implementations. However, little research exists on validating production JVMs. One notable effort is classfuzz, which mutates Java bytecode syntactically to stress-test different JVMs. It is shown that classfuzz mainly produces illegal bytecode files and uncovers defects in JVMs’ startup processes. It remains a significant challenge to effectively test JVMs’ bytecode verifiers and execution engines to expose deeper bugs. This paper tackles this challenge by introducing classming, a novel, effective approach to performing deep, differential JVM testing. The key of classming is a technique, live bytecode mutation, to generate, from a seed bytecode file f , likely valid, executable (live) bytecode files: (1) capture the seed f ’s live bytecode; (2) repeatedly manipulate the control- and data-flow in f ’s live bytecode to generate semantically different variants; and (3) selectively accept the generated variants to steer the mutation process toward live, diverse variants. The generated variants are then employed to differentially test JVMs. We have evaluated classming on mainstream JVM implementations, including OpenJDK’s HotSpot and IBM’s J9, by mutating the DaCapo benchmarks. Our results show that classming is very effective in uncovering deep JVM differences. More than 1,800 of the generated classes exposed JVM differences, and more than 30 triggered JVM crashes. We analyzed and reported the JVM runtime differences and crashes, of which 14 have already been confirmed/fixed, including a highly critical security vulnerability (CVE-2017-1376).

Fri 31 May
Times are displayed in time zone: Eastern Time (US & Canada) change

16:00 - 17:20: Testing and Analysis: Domain-Specific ApproachesPapers / Technical Track / Journal-First Papers at Place du Canada
Chair(s): Gregory GayUniversity of South Carolina, Chalmers | University of Gothenburg
16:00 - 16:20
Talk
Technical Track
Nandor LickerUniversity of Cambridge, Andrew RiceUniversity of Cambridge, UK
Pre-print Media Attached
16:20 - 16:40
Talk
Technical Track
Jingyi WangNational University of Singapore, Singapore, Guoliang DongComputer College of Zhejiang University, Jun SunSingapore Management University, Singapore, Xinyu WangZhejiang University, Peixin ZhangZhejiang University
16:40 - 16:50
Talk
Journal-First Papers
Chunhui WangUniversity of Luxembourg, Fabrizio PastoreUniversity of Luxembourg, Lionel BriandSnT Centre/University of Luxembourg
16:50 - 17:10
Talk
Technical Track
Yuting ChenShanghai Jiao Tong University, Ting SuNanyang Technological University, Singapore, Zhendong SuETH Zurich
17:10 - 17:20
Talk
Papers