THREAD_CONTENDS_ON_LOCK
THREAD_CONTENDS_ON_LOCK(&m->lock_object);
THREAD_CONTENDS_ON_LOCK(&rw->lock_object);
THREAD_CONTENDS_ON_LOCK(&rw->lock_object);
THREAD_CONTENDS_ON_LOCK(&sx->lock_object);
THREAD_CONTENDS_ON_LOCK(&sx->lock_object);
THREAD_CONTENDS_ON_LOCK(&sx->lock_object);
THREAD_CONTENDS_ON_LOCK(&sx->lock_object);