--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/hotspot/share/gc/shared/weakProcessorPhases.hpp	Tue Aug 28 12:57:40 2018 -0400
@@ -0,0 +1,83 @@
+/*
+ * Copyright (c) 2018, 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_GC_SHARED_WEAKPROCESSORPHASES_HPP
+#define SHARE_GC_SHARED_WEAKPROCESSORPHASES_HPP
+
+#include "memory/allocation.hpp"
+#include "utilities/globalDefinitions.hpp"
+#include "utilities/macros.hpp"
+
+class BoolObjectClosure;
+class OopClosure;
+class OopStorage;
+
+class WeakProcessorPhases : AllStatic {
+public:
+  typedef void (*Processor)(BoolObjectClosure*, OopClosure*);
+
+  enum Phase {
+    // Serial phases.
+    JVMTI_ONLY(jvmti COMMA)
+    JFR_ONLY(jfr COMMA)
+
+    // OopStorage phases.
+    jni,
+    vm
+  };
+
+  static const uint serial_phase_start = 0;
+  static const uint serial_phase_count = jni;
+  static const uint oop_storage_phase_start = serial_phase_count;
+  static const uint oop_storage_phase_count = (vm + 1) - oop_storage_phase_start;
+  static const uint phase_count = serial_phase_count + oop_storage_phase_count;
+
+  static Phase phase(uint value);
+  static uint index(Phase phase);
+  // Indexes relative to the corresponding phase_start constant.
+  static uint serial_index(Phase phase);
+  static uint oop_storage_index(Phase phase);
+
+  static bool is_serial(Phase phase);
+  static bool is_oop_storage(Phase phase);
+
+  static const char* description(Phase phase);
+  static Processor processor(Phase phase); // Precondition: is_serial(phase)
+  static OopStorage* oop_storage(Phase phase); // Precondition: is_oop_storage(phase)
+};
+
+typedef WeakProcessorPhases::Phase WeakProcessorPhase;
+
+#define FOR_EACH_WEAK_PROCESSOR_PHASE(P)                                \
+  for (WeakProcessorPhase P = static_cast<WeakProcessorPhase>(0);       \
+       static_cast<uint>(P) <  WeakProcessorPhases::phase_count;        \
+       P = static_cast<WeakProcessorPhase>(static_cast<uint>(P) + 1))
+
+#define FOR_EACH_WEAK_PROCESSOR_OOP_STORAGE_PHASE(P)                    \
+  for (WeakProcessorPhase P = static_cast<WeakProcessorPhase>(WeakProcessorPhases::oop_storage_phase_start); \
+       static_cast<uint>(P) < (WeakProcessorPhases::oop_storage_phase_start + \
+                               WeakProcessorPhases::oop_storage_phase_count); \
+       P = static_cast<WeakProcessorPhase>(static_cast<uint>(P) + 1))
+
+#endif // SHARE_GC_SHARED_WEAKPROCESSORPHASES_HPP