OS-2578 DTrace Userland CTF Support
OS-2579 DTrace userland Keyword
OS-2580 pid provider types
OS-2581 dtest should specify -fPIC when building shared objects
OS-2582 dtrace(1) could have ctf
OS-2583 dtest tests should explicitly build 32-bit libraries and executables
OS-2584 dtest tests should call gcc, not cc
OS-2585 dof emulation missing fault checks
Reviewed by: Bryan Cantrill <bryan@joyent.com>