selftests/landlock: Add landlock_enforce_domain trace tests

Add trace tests for the landlock_enforce_domain event in trace_test.c,
asserting field counts after the syscall returns rather than line
ordering across per-CPU buffers.  They cover single-threaded and TSYNC
enforcement (complete and process_wide set), a multi-threaded non-TSYNC
process (process_wide clear), the single-threaded non-leader edge case,
the flags-only path that creates no domain, and a thread-sync abort that
emits create_domain and free_domain but no enforce_domain.

landlock_enforce_domain is added to the fixture enable path and every
disable list so its zero-events assertions cannot be tripped by a stray
enforcement event.

Test coverage for security/landlock is 91.6% of 2571 lines according to
LLVM 22.

Cc: Günther Noack <gnoack@google.com>
Cc: Tingmao Wang <m@maowtm.org>
Link: https://patch.msgid.link/20260811094338.288094-19-mic@digikod.net
Signed-off-by: Mickaël Salaün <mic@digikod.net>

0 files changed, 0 insertions, 0 deletions