The source file:
has a lot of dummy return values hard-coded (for the Mac OS X case). There are comments suggesting that some
cannot be acquired on BSD. But, it may be possible on Mac OS X and needs to be checked out.
This file will probably be ported over to jdk8 very soon in its current form. But needs to be fixed in 8
and maybe 7u6 (too late for 7u4 probably).