RUBY_EVENT_VM    3385 thread.c           rb_event_flag_t flag = th->event_flags & RUBY_EVENT_VM;
RUBY_EVENT_VM    3411 thread.c       	th->event_flags |= RUBY_EVENT_VM;
RUBY_EVENT_VM    3414 thread.c       	th->event_flags &= (~RUBY_EVENT_VM);
RUBY_EVENT_VM     648 vm_core.h      	if (wait_event__ & (flag | RUBY_EVENT_VM)) { \
RUBY_EVENT_VM     654 vm_core.h      	    if (wait_event__ & RUBY_EVENT_VM) { \