Depends on D39884 because of the ifdefs in the Makefiles, as well as the patch in dtrace_cddl.h.
Bugs so far:
* `vm_fault:36` crashes, for an as-of-yet unknown reason. The instruction preceeding it (`vm_fault:32`) is almost identical, yet it is traced without problems.
* Tracing `memcpy:` and pressing CTRL+C a few times, and then re-running the DTrace with the same probe, hangs the system.