--- old/src/jdk.internal.vm.ci/share/classes/jdk.vm.ci.hotspot.amd64/src/jdk/vm/ci/hotspot/amd64/AMD64HotSpotVMConfig.java	2019-03-28 11:23:39.000000000 -0700
+++ new/src/jdk.internal.vm.ci/share/classes/jdk.vm.ci.hotspot.amd64/src/jdk/vm/ci/hotspot/amd64/AMD64HotSpotVMConfig.java	2019-03-28 11:23:39.000000000 -0700
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2011, 2016, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2011, 2019, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -24,6 +24,7 @@
 
 import jdk.vm.ci.hotspot.HotSpotVMConfigAccess;
 import jdk.vm.ci.hotspot.HotSpotVMConfigStore;
+import jdk.vm.ci.services.Services;
 
 /**
  * Used to access AMD64 specific native configuration details.
@@ -34,7 +35,7 @@
         super(config);
     }
 
-    final boolean windowsOs = System.getProperty("os.name", "").startsWith("Windows");
+    final boolean windowsOs = Services.getSavedProperty("os.name", "").startsWith("Windows");
 
     final boolean useCountLeadingZerosInstruction = getFlag("UseCountLeadingZerosInstruction", Boolean.class);
     final boolean useCountTrailingZerosInstruction = getFlag("UseCountTrailingZerosInstruction", Boolean.class);