t.Skip("Skipping in short mode") // takes up to 64 seconds
	}
	got := runTestProg(t, "testprogcgo", "CgoSignalDeadlock")
	want := "OK\n"
	if got != want {
		t.Fatalf("expected %q, but got:\n%s", want, got)
	}
}

func TestCgoTraceback(t *testing.T) {
	t.Parallel()
	got := runTestProg(t, "testprogcgo", "CgoTraceback")
	want := "OK\n"
	if got != want {

func TestVDSO(t *testing.T) {
	t.Parallel()
	output := runTestProg(t, "testprog", "SignalInVDSO")
	want := "success\n"
	if output != want {
		t.Fatalf("output:\n%s\n\nwanted:\n%s", output, want)
	}
}

func testCrashHandler(t *testing.T, cgo bool) {
	type crashTest struct {
		Cgo bool
	}
	var output string
	if cgo {
		output = runTestProg(t, "testprogcgo", "Crash")
	} else {

	"time"
	"unsafe"
)

func TestGcSys(t *testing.T) {
	t.Skip("skipping known-flaky test; golang.org/issue/37331")
	if os.Getenv("GOGC") == "off" {
		t.Skip("skipping test; GOGC=off in environment")
	}
	got := runTestProg(t, "testprog", "GCSys")
	want := "OK\n"
	if got != want {
		t.Fatalf("expected %q, but got %q", want, got)
	}
}

func TestGcDeepNesting(t *testing.T) {
	type T [2][2][2][2][2][2][2][2][2][2]*int
	a := new(T)