vm_living_thread_num 2017 thread.c       	num = vm_living_thread_num(GET_THREAD()->vm);
vm_living_thread_num 3047 thread.c       	    if (vm_living_thread_num(th->vm) == th->vm->sleeper) {
vm_living_thread_num 3850 thread.c           if (vm_living_thread_num(vm) > vm->sleeper) return;
vm_living_thread_num 3851 thread.c           if (vm_living_thread_num(vm) < vm->sleeper) rb_bug("sleeper must not be more than vm_living_thread_num(vm)");