1 files changed, 24 insertions, 0 deletions
diff --git a/libgo/go/runtime/gc_test.go b/libgo/go/runtime/gc_test.go
new file mode 100644
index 00000000000..fad60a36804
--- /dev/null
+++ b/libgo/go/runtime/gc_test.go
@@ -0,0 +1,24 @@
+package runtime_test
+
+import (
+	"runtime"
+	"testing"
+)
+
+func TestGcSys(t *testing.T) {
+	for i := 0; i < 1000000; i++ {
+		workthegc()
+	}
+
+	// Should only be using a few MB.
+	runtime.UpdateMemStats()
+	sys := runtime.MemStats.Sys
+	t.Logf("using %d MB", sys>>20)
+	if sys > 10e6 {
+		t.Fatalf("using too much memory: %d MB", sys>>20)
+	}
+}
+
+func workthegc() []byte {
+	return make([]byte, 1029)
+}