I haven't used it, but Robert O'Callahan -- one of the project leads -- has been working on tools like this for a number of years. In http://robert.ocallahan.or

I haven't used it, but Robert O'Callahan -- one of the project leads -- has been working on tools like this for a number of years. In http://robert.ocallahan.org/2014/03/introducing-rr.html http://robert.ocallahan.org/2014/03/introducing-rr.html he said: > it's the first "research" tool I've ever built that I like to use myself.