dtrace usdt

[Prashanth Kumar]

Hi
Tried running the dtrace usdt example code from freebsd dtrace userland wiki page.
(https://wiki.freebsd.org/DTrace/userland).

If run standalone the program segfaults.
 # ./db 
Bus error (core dumped) 

If run with dtrace

  # dtrace -s db.d -c ./db
dtrace: script 'db.d' matched 2 probes
CPU     ID                    FUNCTION:NAME
  0  43245                 main:query-start Query: SELECT * FROM apples

the program hungs after printing the first probe.

Had to use the following command
  # env WITH_DTRACE=1 make

to build the program. Is there any other steps that i have missed to make the program work?.
This was tested on FreeBSD 10BETA1 - i386.

regards
Prashanth