Coccinelle (software)

Coccinelle
Stable release 1.0.0-rc20 / February 15, 2014 (2014-02-15)
Development status Active
Written in OCaml and Python
Type Static program analysis
License GNU GPL v2
Website coccinelle.lip6.fr

Coccinelle (French for ladybug) is a tool to match and transform the source code of programs written in the C programming language. Coccinelle was initially used to aid the evolution of Linux kernel, providing support for changes to library application programming interfaces (APIs) such as renaming a function, adding a function argument whose value is somehow context-dependent, and reorganizing a data structure. The tool is freely available under an open-source license.

The source code to be matched or replaced is specified using a pattern very similar to C, called Semantic Patch Language.[1][2]

Support for Coccinelle is provided by IRILL. Funding for the development has been provided by the Agence Nationale de la Recherche (France), the Danish Research Council for Technology and Production Sciences, and INRIA.

Example 

@@
expression lock, flags;
expression urb;
@@

 spin_lock_irqsave(lock, flags);
 <...
- usb_submit_urb(urb)
+ usb_submit_urb(urb, GFP_ATOMIC)
 ...>
 spin_unlock_irqrestore(lock, flags);

@@
expression urb;
@@

- usb_submit_urb(urb)
+ usb_submit_urb(urb, GFP_KERNEL)

References

  1. ↑ Valerie Henson (2009-01-20). "Semantic patching with Coccinelle". Linux Weekly News. Retrieved 2011-04-25.
  2. ↑ Wolfram Sang (2010-03-30). "Evolutionary development of a semantic patch using Coccinelle". Linux Weekly News. Retrieved 2011-04-25.

External links

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