Relavent Links: https://developer.mozilla.org/en/Dehydra https://developer.mozilla.org/en/Treehydra http://dxr.lanedo.com/ http://corp.galois.com/blog/2010/6/4/tech-talk-large-scale-s...
DXR is a source code search engine. It appears to be cscope with a database. That's not nothing, but it's not exactly taking us out of the opaque blobs of text and into semantics.
DXR is currently a pain to get up and running. There's been talk on the mailing list on streamlining the install process but it would still require a lot intervention depending the compilation process. https://groups.google.com/forum/#!topic/mozilla.dev.static-a...