src/tests/sys/kqueue, branch upstream/10.4.0

MFC r305468:

2017-02-10T02:29:39Z

Port contrib/netbsd-tests/kernel/kqueue/... as tests/sys/kqueue/... proc2_test must be skipped because the invariant tested (`ke.fflags & NOTE_TRACKERR`) doesn't pass.

Remove EVFILT_PROCDESC block

2017-02-10T02:29:09Z

This reapplies the patch that was done in ^/stable/10@r297977 This is a direct commit to ^/stable/10 Sponsored by: Dell EMC Isilon

MFC r304797,r305467:

2017-02-10T02:21:57Z

r304797 (by jmmv): Make use of Kyua's work directories. Change the vnode tests to use the current directory when creating temporary files, which we can assume is a volatile work directory, and then make the kqueue_test.sh driver _not_ abandon the directory created by Kyua. This makes the various kqueue tests independent of each other, and ensures the temporary file is cleaned up on failure. Problem spotted by asomers@ when reviewing D4254. r305467: Move tests/sys/kqueue/... to tests/sys/kqueue/libkqueue/... This is being done to clearly distinguish the libkqueue tests from the (soon to be imported) NetBSD tests.

MFC r295012

2016-04-14T17:14:11Z

kqueue EVFILT_PROC: avoid collision between NOTE_CHILD and NOTE_EXIT NOTE_CHILD and NOTE_EXIT return something in kevent.data: the parent pid (ppid) for NOTE_CHILD and the exit status for NOTE_EXIT. Do not let the two events be combined, since one would overwrite the other's data. PR: 180385 Submitted by: David A. Bright Sponsored by: Dell Inc.

MFC r282063:

2015-05-13T10:21:13Z

Integrate tools/regression/kqueue into the FreeBSD test suite as tests/sys/kqueue