Variability encoding: From compile-time to load-time variability
Variability encoding: From compile-time to load-time variability
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可变性编码:从编译时可变性到加载时可变性
DOI:
10.1016/j.jlamp.2015.06.007
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发表时间:
2016
期刊:
影响因子:
--
通讯作者:
Sven Apel
中科院分区:
文献类型:
--
作者:
Alexander von Rhein;Thomas Thüm;Ina Schaefer;Jörg Liebig;Sven Apel
Many software systems today are configurable. Analyzing configurable systems is challenging, especially as (1) the number of system variants may grow exponentially with the number of configuration options, and (2) often existing analysis tools cannot be used for configurable systems. Recent work proposes to automatically transform compile-time variability into load-time variability—calledvariability encoding—with the goal of reusing existing analysis tools for analyzing configurable systems and improving analysis performance compared to analyzing all system variants in a brute-force manner. However, it is not clear whether one can automatically find an efficiently analyzable load-time configurable system for any given compile-time configurable system. Also, for many analyses, we need guarantees that the load-time configurable system precisely encodes the behavior of all system variants that can be statically derived. We address both issues (1) by developing a formal model of variability encoding based onFeatherweight Java, (2) by proving that variability encoding preserves variant behavior with respect to a core set of language mechanisms, (3) by discussing how our work extends to more complex language mechanisms that elude our formal model, and (4) by sharing our experience with implementing and using variability encoding in real-world applications.
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