)

func init() {
	register("GCFairness", GCFairness)
	register("GCFairness2", GCFairness2)
	register("GCSys", GCSys)
	register("GCPhys", GCPhys)
	register("DeferLiveness", DeferLiveness)
	register("GCZombie", GCZombie)
	register("GCMemoryLimit", GCMemoryLimit)
	register("GCMemoryLimitNoGCPercent", GCMemoryLimitNoGCPercent)
}

func GCSys() {
	runtime.GOMAXPROCS(1)
	memstats := new(runtime.MemStats)
	runtime.GC()

	// Pointers in zombies slice may cross-span, thus we
	// add invalidptr=0 for avoiding the badPointer check.
	// See issue https://golang.org/issues/49613/
	got := runTestProg(t, "testprog", "GCZombie", "GODEBUG=invalidptr=0")
	want := "found pointer to free object"
	if !strings.Contains(got, want) {
		t.Fatalf("expected %q in output, but got %q", want, got)
	}
}