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automated program repair: a step towards software automation

Science China(Information Sciences) 2019年第10期62卷 47-49页

作者： Abhik ROYCHOUDHURY Yingfei XIONG School of Computing National University of Singapore Key Laboratory of High Confidence Software Technologies (Peking University) Ministry of Education Institute of Software Department of Computer SciencePeking University

programming is seen as a problem solving activity, which combines precision with creativity. The program needs to be precise at least to the extent of passing given tests. At the same time, the programmer employs copious creativity in terms of problem solving strategies, algorithm design, data structure choice, or even choice of which libraries to invoke. The recent growth of machine learn-

关键词： automated program repair a step towards software automation

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Evaluating the usage of fault localization in automated program repair:an empirical study

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Frontiers of Computer Science 2021年第1期15卷 53-67页

作者： Deheng YANG Yuhua QI Xiaoguang MAO Yan LEI College of Computer National University of Defense TechnologyChangsha 410073China Laboratory of Software Engineering for Complex Systems Changsha 410073China Beijing Institute of Tracking and Communication Technology Beijing 100094China School of Big Data&Software Engineering Chongqing UniversityChongqing 400044China

Fault localization techniques are originally proposed to assist in manual debugging by generally producing a rank list of suspicious *** the increasing popularity of automated program repair,the fault localization techniques have been introduced to effectively reduce the search space of automated program *** developers who mainly focus on the rank information,current automated program repair has two strategies to use the fault localization information:suspiciousness-first algorithm(SFA)based on the suspiciousness accuracy and rank-first algorithm(RFA)relying on the rank ***,despite the fact that the two different usages are widely adopted by current automated program repair and may result in different repair results,little is known about the impacts of the two strategies on automated program *** this paper we empirically compare the performance of SFA and RFA in the context of automated program ***,we implement the two strategies and six well-studied fault localization techniques into four state-of-the-art automated program repair tools,and then use these tools to perform repair experiments on 60 real-world bugs from *** study presents a number of interesting findings:RFA outperforms SFA in 70.02%of cases when measured by the number of candidate patches generated before a valid patch is found(NCP),while SFA performs better in parallel repair and patch diversity;the performance of SFA can be improved by increasing the suspiciousness accuracy of fault localization techniques;finally,we use SimFix that deploys SFA to successfully repair four extra Defects4J bugs which cannot be repaired by SimFix originally using *** observations provide a new perspective for future research on the usage and improvement of fault localization in automated program repair.

关键词： automated program repair fault localization empirical study

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More efficient automatic repair of large-scale programs using weak recompilation

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Science China(Information Sciences) 2012年第12期55卷 2785-2799页

作者： QI YuHua 1,MAO XiaoGuang 1,WEN YanJun 1,DAI ZiYing 1 & GU Bin 2 1 School of Computer,National University of Defense Technology,Changsha 410073,China 2 Beijing Institute of Control Engineering,Beijing 100190,China 1. School of Computer National University of Defense Technology Changsha 410073 China2. Beijing Institute of Control Engineering Beijing 100190 China

Automatically repairing a bug can be a time-consuming process especially for large-scale programs owing to the significant amount of time spent recompiling and reinstalling the patched *** reduce this time overhead and speed up the repair process,in this paper we present a recompilation technique called weak *** weak recompilation,we assume that a program consists of a set of components,and for each candidate patch only the altered components are recompiled to a shared *** original program is then dynamically updated by a function indirection *** advantage of weak recompilation is that redundant recompilation cost can be avoided,and while the reinstallation cost is completely eliminated as the original executable program is not modified at *** maximum applicability of weak recompilation we created WAutorepair,a scalable system for fixing bugs with high efficiency in large-scale C *** experiments on real bugs in widely used programs show that our repair system significantly outperforms Genprog,a wellknown approach to automatic program *** the wireshark program containing over 2 million lines of code,WAutorepair is over 128 times faster in terms of recompilation cost than Genprog.

关键词： weak recompilation efficiency automated program repair automated debugging experiment

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