ufunc() doesn't work

[Eugene M. Zheganin]

Hi.

I'm new to dtrace and I test various examples while learning, but it
seems to me that I miss something. This example doesn't work on FreeBSD:

dtrace -n 'profile-97/arg1/ { @[ufunc(arg1)] = count(); }'

although it works fine on Solaris. As I understand, ufunc() is some kine
of core function, not the stuff brought by some provider that is
probably missing on FreeBSD. Why doesn't this work ? I use it on FreeBSD
10.0-STABLE r261282.

Thanks.