alloc_event_hook  132 vm_trace.c         rb_event_hook_t *hook = alloc_event_hook(func, events, data, hook_flags);
alloc_event_hook  145 vm_trace.c         rb_event_hook_t *hook = alloc_event_hook(func, events, data, RUBY_EVENT_HOOK_FLAG_SAFE);
alloc_event_hook  158 vm_trace.c         rb_event_hook_t *hook = alloc_event_hook(func, events, data, hook_flags);