COPS: An improved information retrieval-based bug localization technique using context-aware program simplification

计算机科学 调试 Python(编程语言) Java 跟踪(心理语言学) 语句(逻辑) 背景(考古学) 程序设计语言 软件错误 情报检索 软件 数据挖掘 人工智能 古生物学 法学 哲学 生物 语言学 政治学
作者
Yilin Yang,Ziyuan Wang,Chunrong Fang,Baowen Xu
出处
期刊:Journal of Systems and Software [Elsevier BV]
卷期号:207: 111868-111868
标识
DOI:10.1016/j.jss.2023.111868
摘要

Information Retrieval Based Bug Localization (IRBL) techniques are well suited for large-scale software debugging with fewer external dependencies and lower execution costs. However, existing IRBL techniques have several challenges, including localization granularity and applicability. First, existing IRBL techniques have not yet achieved statement-level bug localization. Second, almost all studies are limited to Java-based projects, while their effectiveness for other popular programming languages (e.g., Python) is unknown. The reason for these deficiencies is that existing IRBL techniques mainly rely on conventional NLP techniques to analyze the bug reports and have not yet fully utilized the stack traces attached to the bug reports. To improve the IRBL technique, we propose a context-aware program simplification technique – COPS – that can localize defective statements in suspicious files by analyzing the stack traces in bug reports, enabling statement-level bug localization for Python-based projects. Our experiment is based on 948 bug reports, and the results show that COPS can effectively localize buggy statements. First, compared to the original stack traces, Top@10 is improved by 102.6%, MAP@10 by 56.2%, and MRR@10 by 95.6%. We found that actual buggy code entities are more likely to appear in the first five frames of the stack trace. Second, COPS can achieve equally good localization performance compared to state-of-the-art statement-level bug localization techniques and achieve 92% buggy statement coverage with a full-scope search. Finally, experiments found that the stack trace's first two-thirds of information is more conducive to localizing buggy statements.

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