An empirical study of operating systems errors
SOSP '01 Proceedings of the eighteenth ACM symposium on Operating systems principles
Using aspectC to improve the modularity of path-specific customization in operating system code
Proceedings of the 8th European software engineering conference held jointly with 9th ACM SIGSOFT international symposium on Foundations of software engineering
The structure and value of modularity in software design
Proceedings of the 8th European software engineering conference held jointly with 9th ACM SIGSOFT international symposium on Foundations of software engineering
CCFinder: a multilinguistic token-based code clone detection system for large scale source code
IEEE Transactions on Software Engineering
Back to the future: a retroactive study of aspect evolution in operating system code
Proceedings of the 2nd international conference on Aspect-oriented software development
On finding duplication and near-duplication in large software systems
WCRE '95 Proceedings of the Second Working Conference on Reverse Engineering
A Language Independent Approach for Detecting Duplicated Code
ICSM '99 Proceedings of the IEEE International Conference on Software Maintenance
Evolution in Open Source Software: A Case Study
ICSM '00 Proceedings of the International Conference on Software Maintenance (ICSM'00)
An Evaluation of Clone Detection Techniques for Identifying Crosscutting Concerns
ICSM '04 Proceedings of the 20th IEEE International Conference on Software Maintenance
Aspect Mining Using Event Traces
Proceedings of the 19th IEEE international conference on Automated software engineering
An empirical study of code clone genealogies
Proceedings of the 10th European software engineering conference held jointly with 13th ACM SIGSOFT international symposium on Foundations of software engineering
Using a clone genealogy extractor for understanding and supporting evolution of code clones
MSR '05 Proceedings of the 2005 international workshop on Mining software repositories
On the Use of Clone Detection for Identifying Crosscutting Concern Code
IEEE Transactions on Software Engineering
Modular Software Design with Crosscutting Interfaces
IEEE Software
CP-Miner: Finding Copy-Paste and Related Bugs in Large-Scale Software Code
IEEE Transactions on Software Engineering
Mining Aspects from Version History
ASE '06 Proceedings of the 21st IEEE/ACM International Conference on Automated Software Engineering
Representing concerns in source code
ACM Transactions on Software Engineering and Methodology (TOSEM)
XIAO: tuning code clones at hands of engineers in practice
Proceedings of the 28th Annual Computer Security Applications Conference
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Modularity is an important principle of software design. It is directly associated with software understandability, maintainability, and reusability. However, as software systems evolve, old code segments are modified / removed and new code segments are added, the original modular design of the program might be distorted. One of the factors that can affect the modularity of the system is the introduction of code clones --- a portion of source code that is identical or similar to another --- in the software evolution process. This paper applies clone detection techniques to study the modularity of Linux. The code clones are first identified using an automatic tool. Then each clone set is analyzed by a domain expert to classify it into one of the three clone concern categories: singular concern, crosscutting concern, and partial concern. Different approaches to dealing with these different categories of code clones are suggested in order to improve modularity.