thval2thread_t    139 vm_trace.c         rb_threadptr_add_event_hook(thval2thread_t(thval), func, events, data, RUBY_EVENT_HOOK_FLAG_SAFE);
thval2thread_t    152 vm_trace.c         rb_threadptr_add_event_hook(thval2thread_t(thval), func, events, data, hook_flags);
thval2thread_t    192 vm_trace.c         return rb_threadptr_remove_event_hook(thval2thread_t(thval), func, Qundef);
thval2thread_t    198 vm_trace.c         return rb_threadptr_remove_event_hook(thval2thread_t(thval), func, data);