Kayrebt::Extractor is a simple gcc plugin aiming at dumping the CFG of any function in a C file in a human-readable form. It outputs graphs, and more specifically UML2-like activity diagrams.

First of all, make sure you use GCC 4.8. The API for plugins and GCC ABI change a lot from major version to major version so it's highly probable that this code won't compile either on GCC 4.7 or GCC 4.9.

The plugin is packaged with autotools so:

./configure make make install

You may want to make a symlink from your library kayrebt_extractor.so to the GCC plugin installation directory.

Kayrebt::Extractor works best with C. You can try any language supported by GCC as the CFG are all written in the same language, GIMPLE. However, the output is likely to be mangled enough to be unusable.

To compile a project, add a configuration file and run with

make CC=gcc CFLAGS=-fplugin=kayrebt_extractor