extraTestHookUninstallers = append(extraTestHookUninstallers, uninstallAccept4TestHook)
}

var (
	// Placeholders for saving original socket system calls.
	origAccept4 = poll.Accept4Func
)

func installAccept4TestHook() {
	poll.Accept4Func = sw.Accept4
}

func uninstallAccept4TestHook() {
	poll.Accept4Func = origAccept4