Where can I find good open source code flow visualization software?

Question

I am working on an academic research regarding some very long functions in the Linux kernel (link, link).

For that research, I would like to use some code flow visualization tool, that would be able to plot a graph in which each vertex is a decision point and each edge is a piece of code which runs in a consequent way.

Do you know of any good, open source project that can visualize C code?

Answer 1

Perhaps a tool like KCacheGrind would be of help. It generates call graphs based on actual calls and cannot pre-generate a call graph without actually running the program, which may not suit your needs, but then it again it may.

Answer 2

History flow's are very neat for changes/diff across multiple versions.

Codeplex has a project, Dependency Visualizer which does support C also.

Gprof2Dot can render oprofile, this would get you dynamic info also.

CodeViz also (static tool) would work.

If your using gcc, gcc-xml has an introspector plugin also todo this.