// what the code in mem_bsd.go, mem_darwin.go, and mem_linux.go expects.
// See the uses of ENOMEM in sysMap in those files.
func TestMmapErrorSign(t *testing.T) {
	p, err := runtime.Mmap(nil, ^uintptr(0)&^(runtime.GetPhysPageSize()-1), 0, runtime.MAP_ANON|runtime.MAP_PRIVATE, -1, 0)

	if p != nil || err != runtime.ENOMEM {
		t.Errorf("mmap = %v, %v, want nil, %v", p, err, runtime.ENOMEM)
	}
}

func TestPhysPageSize(t *testing.T) {

package runtime

var Mmap = mmap
var Munmap = munmap

const ENOMEM = _ENOMEM
const MAP_ANON = _MAP_ANON
const MAP_PRIVATE = _MAP_PRIVATE
const MAP_FIXED = _MAP_FIXED

func GetPhysPageSize() uintptr {
	return physPageSize