1. Individual Research Presentation
Software Clones
Presented By:
Adarsh Khare

2. Outline 1 Introduction Types of Clones Root Causes for Code Clones
Strategies
Tools Suggested
Relating with 577a and 577b 1

3. Types of Clones 2 Type1 Type 2 Type 3 Exact copy without modifications
Syntactically Identical Copy ( only variable, type, or function identifiers have been changes)
Type 3
A copy with further modifications ( statements have been changes, added, or removed) 2

4. Root Causes 3 Programmers are forced to duplicate the code
Programmers reuse the copied text as a template and then customize
Time Pressure
Organizational Issues ( e.g distributed development organizations) 3

5. Strategies 4 Clone Avoidance Clone Removal Clone Detection
Better to avoid them at the beginning.
Clone Removal
Can be achieved using commercial tools
Clone Detection 4

6. Tool Suggested ( Clone Removal)
Let programmers copy and adjust, and then let tools factor out the
differences with appropriate mechanisms. –Ira Baxter, 2002
Clone Dr 5

7. Features of the Tool
Compares files exhaustively across whole systems
Available for many different languages like PHP 4.0 & 5.0, C,C++, C#
Supports analysis of thousands of files/millions of lines of code. 6

8. Relating with 577a and 577b
577a
Start gathering knowledge about the tools.
577b
Use the tools during “Development Phase”. 7

9. References 8 Clone Dr http://www.semdesigns.com/Products/Clone/
Survey Research and cloning   8

10. Thank You !