func raceacquire(addr unsafe.Pointer)                                       { throw("race") }
func raceacquireg(gp *g, addr unsafe.Pointer)                               { throw("race") }
func raceacquirectx(racectx uintptr, addr unsafe.Pointer)                   { throw("race") }
func racerelease(addr unsafe.Pointer)                                       { throw("race") }