RUBY_EVENT_HOOK_FLAG_SAFE  139 vm_trace.c         rb_threadptr_add_event_hook(thval2thread_t(thval), func, events, data, RUBY_EVENT_HOOK_FLAG_SAFE);
RUBY_EVENT_HOOK_FLAG_SAFE  145 vm_trace.c         rb_event_hook_t *hook = alloc_event_hook(func, events, data, RUBY_EVENT_HOOK_FLAG_SAFE);
RUBY_EVENT_HOOK_FLAG_SAFE  514 vm_trace.c         rb_threadptr_add_event_hook(th, call_trace_func, RUBY_EVENT_ALL, trace, RUBY_EVENT_HOOK_FLAG_SAFE);
RUBY_EVENT_HOOK_FLAG_SAFE 1018 vm_trace.c     				  RUBY_EVENT_HOOK_FLAG_SAFE | RUBY_EVENT_HOOK_FLAG_RAW_ARG);
RUBY_EVENT_HOOK_FLAG_SAFE 1022 vm_trace.c     			   RUBY_EVENT_HOOK_FLAG_SAFE | RUBY_EVENT_HOOK_FLAG_RAW_ARG);