shared shadow vm object invalidation regression test

Add a regression test for a scenario where a shadow vm object is shared
by multiple mappings. If a page COW occurs through one of the mappings,

shared shadow vm object invalidation regression test

Add a regression test for a scenario where a shadow vm object is shared
by multiple mappings. If a page COW occurs through one of the mappings,
then the virtual-to-physical mapping may become invalidated.

This tests the scenario from CVE-2021-29626 which was fixed by
982693bb729badac4e65ecd59772979f2849a2b2.

Reviewed by: markj
Sponsored by: Dell EMC Isilon

(cherry picked from commit 13d4f96130b64b42f74dfc484305b08c4da54669)

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Add some tests for page fault signals and codes

It is useful to have some tests for page fault signals.

More tests would be useful but creating the conditions (such as various
kinds of running out

Add some tests for page fault signals and codes

It is useful to have some tests for page fault signals.

More tests would be useful but creating the conditions (such as various
kinds of running out of memory and I/O errors) is more complicated.

The tests page_fault_signal__bus_objerr_1 and
page_fault_signal__bus_objerr_2 depend on https://reviews.freebsd.org/D21566
before they can pass.

PR: 211924
Reviewed by: kib
Differential Revision: https://reviews.freebsd.org/D21624

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Add a few regression tests for mlock(2).

These are intended to exercise some rarely executed code paths.

MFC after: 2 weeks

Merge ^/user/ngie/release-pkg-fix-tests to unbreak how test files are installed
after r298107

Summary of changes:

- Replace all instances of FILES/TESTS with ${PACKAGE}FILES. This ensures that
na

Merge ^/user/ngie/release-pkg-fix-tests to unbreak how test files are installed
after r298107

Summary of changes:

- Replace all instances of FILES/TESTS with ${PACKAGE}FILES. This ensures that
namespacing is kept with FILES appropriately, and that this shouldn't need
to be repeated if the namespace changes -- only the definition of PACKAGE
needs to be changed
- Allow PACKAGE to be overridden by callers instead of forcing it to always be
`tests`. In the event we get to the point where things can be split up
enough in the base system, it would make more sense to group the tests
with the blocks they're a part of, e.g. byacc with byacc-tests, etc
- Remove PACKAGE definitions where possible, i.e. where FILES wasn't used
previously.
- Remove unnecessary TESTSPACKAGE definitions; this has been elided into
bsd.tests.mk
- Remove unnecessary BINDIRs used previously with ${PACKAGE}FILES;
${PACKAGE}FILESDIR is now automatically defined in bsd.test.mk.
- Fix installation of files under data/ subdirectories in lib/libc/tests/hash
and lib/libc/tests/net/getaddrinfo
- Remove unnecessary .include <bsd.own.mk>s (some opportunistic cleanup)

Document the proposed changes in share/examples/tests/tests/... via examples
so it's clear that ${PACKAGES}FILES is the suggested way forward in terms of
replacing FILES. share/mk/bsd.README didn't seem like the appropriate method
of communicating that info.

MFC after: never probably
X-MFC with: r298107
PR: 209114
Relnotes: yes
Tested with: buildworld, installworld, checkworld; buildworld, packageworld
Sponsored by: EMC / Isilon Storage Division

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More 'tests' package fixes.

Sponsored by: The FreeBSD Foundation

Convert the map_at_zero test case to ATF. In particular, this will
facilitate adding more mmap() tests.

MFC after: 2 weeks
Differential Revision: https://reviews.freebsd.org/D3268

Move tests/sys/kern/mmap_test to tests/sys/vm/mmap_test

As jhb noted, the actual mmap(2) implementation is under sys/vm, not
sys/kern/, so the correct logical place is tests/sys/vm/, not
tests/sys/k

Move tests/sys/kern/mmap_test to tests/sys/vm/mmap_test

As jhb noted, the actual mmap(2) implementation is under sys/vm, not
sys/kern/, so the correct logical place is tests/sys/vm/, not
tests/sys/kern/

X-MFC with: r282076
MFC after: 6 days

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