gettimeofday((void *)-1, NULL) implicates core dump on recent FreeBSD 11-CURRENT

[Garrett Cooper]

On Jul 8, 2015, at 12:17, Doug Rabson <dfr at rabson.org> wrote:

> As far as I can tell, POSIX doesn't require either EFAULT or any other
> behaviour - the text in http://www.open-std.org/jtc1/sc22/open/n4217.pdf
> just says, "No errors are defined". Our man page is wrong and any real
> program which relies on gettimeofday not faulting when given bad inputs is
> broken.

I would suggest the following:
1. Document behavior in NOTES about gettimeofday returning EFAULT with the specific scenarios kib mentioned, segfaulting otherwise (wordsmithing the actual info of course). Otherwise, it might confuse people who look at the manpage later.
2. I’ll add a `#ifdef __FreeBSD__` to the testcase which will then skip it, because it’s easier to do that then test undefined behavior that only makes sense on NetBSD.
Thanks!
-NGie
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