return 4
	}
	return gen + 1
}

// traceRegisterLabelsAndReasons re-registers mark worker labels and
// goroutine stop/block reasons in the string table for the provided
// generation. Note: the provided generation must not have started yet.
func traceRegisterLabelsAndReasons(gen uintptr) {
	for i, label := range gcMarkWorkerModeStrings[:] {