From the discussion it is concluded that clone detection using software metrics and. Software maintenance, clone detection, software evaluation, design maintenance system. Based on an existing software clone tool ccfinder, i try to elaborate how to introduce context information in source code in order to improve detection of type iii software clones. Several studies have been proposed in the literature on software clones from different points of view and covering many correlated features and areas, which are particularly relevant to software maintenance and evolution. In this paper, we describe our experience on clone detection through three different tools and investigate the impact of clone refactoring on different software quality metrics. Freescale semiconductor techniques and tools for software analysis, rev. We evaluated our approach in comparison to the stateoftheart, and the results. Starting from clone perceptions, classification of clones and an overall assortment of selected techniques and tools is discussed. Clone digger aimed to detect similar code in python and java programs.
Introduction when a programmer copies and pastes a fragment of code, possibly. Can clone detection support quality assessments of. Transferring codeclone detection and analysis to practice. Comparison and evaluation of code clone detection techniques and tools have been carried out by bellon and koschke. Application of clone detection clone detection is employed for various use cases that impose different requirements on the employed algorithms.
It detects bugs clone detection is the only tool that can. Empirical evaluation of clone detection toolstechniques is presented. An efficient software clone detection system based on the textual comparison of dynamic methods and metrics computation gurunadha rao goda ph. Roy department of computer science university of saskatchewan, canada chanchal. Clone detection in source code has been researched extensively and resulted in numerous clone detection techniques and tools. In this paper, we provide a qualitative comparison and evaluation of the current stateofthe. Deep learning code fragments for code clone detection. Comparison and evaluation of code clone detection techniques and tools.
While possessing common interests with the clone detection, the plagiarism detection is di. Overview of clone detection techniques many clone detection approaches have been proposed in the literature. Based on an existing software clone tool ccfinder, i try to elaborate how to introduce context information in source code in order to improve detection of type iii software clones by realizing this new software clone detection tool. Get information on 5 major criteria for selecting a testing tool, follow kovair blog for letest information and updates on software development and information technology. Valuebased program characterization and its application to. The results of the comparison are represented on a new excel. Several clone detection approaches, techniques and tools are discussed in great details in section 5. Inconsistencies across multiple copies of a code clone may indicate buggy code locations to inspect and. As model clone detection research and tools emerge, methods must be. Software clone detection based on context information. Varghese5 1marthoma college of management and technology. Scenariobased comparison of clone detection techniques chanchal k. To alleviate the negative consequences of cloning in existing software, clone management tools employ cloning information to guide maintenance activities 19, 20, 21, 22.
Why and how to control cloning in software artifacts mediatum. Pdf retrieving software component using clone detection and. Evaluation of clone detection techniques is discussed. The selected techniques cover the whole spectrum of the stateoftheart in clone detection. Detection techniques and tools comparison of the detection approaches. Detection and analysis of software clones dissertation directed by professor jugal kalita effective detection of code clones is important for software maintenance. Further this paper also shows a typical comparison between the various techniques of the code clone detection. Scenariobased comparison of clone detection techniques. Clone type based comparison among code clone detection.
Some of the syntactic approaches are metricbased i. A tool is developed in java for the system and detects. Software similarity detection worcester polytechnic institute. In this paper, we provide a qualitative comparison and evaluation of the current stateoftheart in clone detection techniques and tools, and organize the large amount of information into a coherent conceptual framework. How detected clones can be removed automatically and areas related to clone detection are discussed in section 7. Valuebased program characterization and its application. Valuebased program characterization and its application to software plagiarism detection yoonchan jhi1 xinran wang1 xiaoqi jia2 sencun zhu1 peng liu1 dinghao wu1 1penn state university, university. Cordya, rainer koschkeb aschool of computing, queens university. Over the last decade many techniques and tools for software clone detection have been proposed. Comparison and evaluation of clone detection tools ucl.
Evaluation of clone detection techniques is discussed in section 6. Based on the level of analysis applied to the source code, the techniques can roughly be classi. They also propose a set of hypothetical editing scenarios for different clone types and evaluate the clone detection techniques based on their estimated potential to. Software clone detection and refactoring francesca arcelli fontana, marco zanoni, andrea ranchetti and davide ranchetti university of milanobicocca, viale sarca, 336, 20126 milano. The synonyms for the term similar code are clone and duplicate code. In this thesis, we advance the stateoftheart in clone detection and analysis in several ways. For example, code clones may be candidates for refactoring e. It worked fine, but seems always a bit behind state of the art e. A framework for evaluating model clone detectors using. Comparison and evaluation of code clone detection techniques.
This obvious gap between the clone detection tools and the clone analysis tools, makes the refactoring and the programmers refactoring the duplicate codes. Excel compare is a tool that saves you the trouble of manually searching for differences and offers you computeraided comparing of excel files. Software plagiarism detection we roughly group the existing software plagiarism detection methods into the following two categories. In this paper, we provide a qualitative comparison and evaluation of the current stateoftheart in clone. Clone type based comparison among code clone detection tools. Clone detection can tolerate changes in code duplication detection, including not only variable changes, but also statement insertion and deletion. This is a partial comparison list of disk cloning software, computer programs that can copy the contents of one disk into another disk or into a disk image. From the discussion it is concluded that clone detection using software metrics and artificial neural network is the best technique of code clone detection, analysis and clone prediction. It is a commercial software with different licenses. File comparison software for data analysis formula soft. Highlights a feedbackbased job modeling scheme based on clone detection technique is presented in this paper.
In this paper, we present a clone detection technique to extract. Source line equality assumes that the cloning process introduced no changes in identifiers, comments, spacing, or other nonsemantic changes, and thus limits clone detection to exact matches. In section ii software plagiarism detection tools has been discussed. Study and comparison of various image edge detection techniques. Starting from clone perceptions, classification of clones and an overall assortment of selected. Second, we present a comprehensive method for clone control. In this paper, various types of metric based clone detection approach and techniques are discussed.
Technical report 541, queens university at kingston, 2007. Clone detection and program slicing is a promising techniques to analyse. An efficient software clone detection system based on the. Several studies have been proposed in the literature on software clones from different points of view and covering many correlated features and areas, which are particularly relevant to software maintenance. In this scheme, the execution data for each job which runs in the environment is stored in execution history. These techniques can be roughly classified into three categories. This method of clone detection can also be implemented to more complex application such as web applications. Ijca a survey of software clone detection techniques. Static birthmark based software plagiarism detection. A survey of software clone detection techniques request pdf. Despite the fact that clone detection is a mature research field, clone. Software clone detection code cloning reusing code fragments by copying. Analysis of differences between code clones in productive software revealed over 100 faults.
Cordy school of computing, queens university kingston, on, canada k7l 3n6. Data clone detection and visualization in spreadsheets. This document describes how to use our incremental clone detection tool iclones to extract clone evolution data from a programs history. Deep learning code fragments for code clone detection martin white, michele tufano, christopher vendome, and denys poshyvanyk department of computer science college of william and mary. Study and comparison of various image edge detection. Textbased techniques perform little or no transformation to the raw source code before attempting to detect identical or similar sequences of lines of code.
Performance comparisons are quantitative comparisons. In this paper, we present a clone detection technique to extract exact clones from objectoriented source code using differential file comparison algorithm diff to. Software engineering, code reuse, code clone detection techniques, higherlevel clone. Resource requirement prediction using clone detection technique. The techniques work on text, lexical and syntactic information, software metrics, and program dependency graphs. Its easier to use clone detection doesnt require tedious info such as compiler or build options. Code clone detection and analysis using software metrics. Their clone candidates were evaluated by one of the authors as an independent third party. A refactoring technique for large groups of software clones asif s. Different levels of clones are discussed in this paper and a metricbased clone detection. Section 5 discusses the advantages and disadvantages of various edge detection techniques.
A newly submitted job is analyzed to find its clones from the execution history. Clone detection in web application using clone metrics. The era of big data has introduced new applications for clone detection e. Clone detection using diff algorithm for aspect mining. Software clone detection and refactoring francesca arcelli fontana, marco zanoni, andrea ranchetti and davide ranchetti university of milanobicocca, viale sarca, 336, 20126 milano, italy. This paper covers the whole paradigm in clone detection and presents open research avenues in code clone detection. I am looking for a simple tool that can identify similar parts in one or multiple. A tool is developed in java for the system and detects the higherlevel clone called directory clones in java. What you need is access to the source code of your programs different versions for example, access to the repository. A survey of software clone detection techniques semantic scholar. Roy and cordy compared clone detection techniques on the basis of several criteria like language support, comparison granularity, clone similarity, and code representation. Code clone detection and analysis using software metrics and. Software requirements specifications srs are the corner stone of most. Section 6 discusses the conclusion reached by analysis and visual comparison of various edge detection techniques developed using matlab 7.
So, many code clone detection techniques have been proposed to find this duplicated code in legacy systems. And sometimes programmers need to manually understand the clones by the use of clone detection tools, decide how they should be refectories. The existing static analysis techniques except for the birthmarkbased techniques are closely related to the clone detection 1, 3, 18, 19, 16, 12, 15, 14, 31. It detects bugs clone detection is the only tool that can detect copypaste errors. Keywords software clone, code clone, duplicated code detection, clone detection 1. Detection of duplicated bugs within a piece of software is challenging, especially when duplica. Citeseerx comparison and evaluation of clone detection tools.
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