A while ago I committed the linuxulator D-Trace probes I talked about earlier. I waited a little bit for this announcement to make sure I have not broken anything. Nobody complained so far, so I assume nothing obviously bad crept in.
The >500 probes I committed do not cover the entire linuxulator, but are a good start. Adding new ones is straight forward, if someone is interested in a junior–kernel-hacker task, this would be one. Just ask me (or ask on emulation@), and I can guide you through it.