--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/hotspot/src/share/vm/gc_implementation/shared/gcWhen.hpp	Mon Jun 10 11:30:51 2013 +0200
@@ -0,0 +1,48 @@
+/*
+ * Copyright (c) 2012, 2013, 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
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ *
+ */
+
+#ifndef SHARE_VM_GC_IMPLEMENTATION_SHARED_GCWHEN_HPP
+#define SHARE_VM_GC_IMPLEMENTATION_SHARED_GCWHEN_HPP
+
+#include "memory/allocation.hpp"
+#include "utilities/debug.hpp"
+
+class GCWhen : AllStatic {
+ public:
+  enum Type {
+    BeforeGC,
+    AfterGC,
+    GCWhenEndSentinel
+  };
+
+  static const char* to_string(GCWhen::Type when) {
+    switch (when) {
+    case BeforeGC: return "Before GC";
+    case AfterGC:  return "After GC";
+    default: ShouldNotReachHere(); return NULL;
+    }
+  }
+};
+
+#endif // SHARE_VM_GC_IMPLEMENTATION_SHARED_GCWHEN_HPP