want := "string passed from C to Go"
	if stringFromGo != want {
		t.Errorf("string passed through C is %s, want %s", stringFromGo, want)
	}
}

var stringFromGo string

//export goWithString
func goWithString(s string) {
	stringFromGo = s
}

func testCallbackStack(t *testing.T) {
	// Make cgo call and callback with different amount of stack available.