There is a big chance that you will have trouble running dtrace(1) and dtruss(1) on your Mac OS X machine the first time you try them and get the following error message:
$ sudo dtruss ./addCLAImproved 1 2 2>&1 | grep -i write dtrace: error on enabled probe ID 2132 (ID 156: syscall::write:return): invalid kernel access in action #12 at DIF offset 92
In this case you might need to disable the DTrace restrictions but still keep System Integrity Protection active for everything else. You can learn more about System Integrity Protection by visiting https://support.apple.com/en-us/HT204899.
