perf lock contention: Filter events before creating lock_stat

In report_lock_contention_begin_event(), lock_stat_findnew() was
called before checking filters.nr_types (-Y), filters.nr_addrs (-L),
and match_callstack_filter() (-S).

When a filtered-out lock event (such as a mutex contention when
running with -Y spinlock) shared the same aggregation key as a
subsequent matching event (for example, contention on the mutex's
internal wait_lock spinlock from the same caller), the first event
created the lock_stat entry with the filtered-out lock's flags and the
second event reused that entry, causing non-spinlock entries to appear
in -Y spinlock output.

Check the type, address, and callstack filters before looking up or
creating the lock_stat entry.

Fixes: b4a7eff93c39f985 ("perf lock contention: Add -Y/--type-filter option")
Reviewed-by: Namhyung Kim <namhyung@kernel.org>
Signed-off-by: Ian Rogers <irogers@google.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

0 files changed, 0 insertions, 0 deletions