--- /dev/null	2019-11-19 22:05:02.069813242 -0800
+++ new/src/hotspot/share/gc/g1/g1GCParPhaseTimesTracker.hpp	2020-05-11 18:24:51.045813466 -0700
@@ -0,0 +1,55 @@
+/*
+ * Copyright (c) 2020, 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_G1_G1GCPARPHASETIMESTRACKER_HPP
+#define SHARE_GC_G1_G1GCPARPHASETIMESTRACKER_HPP
+
+#include "gc/g1/g1GCPhaseTimes.hpp"
+#include "jfr/jfrEvents.hpp"
+
+class G1GCParPhaseTimesTracker : public CHeapObj<mtGC> {
+protected:
+  Ticks _start_time;
+  G1GCPhaseTimes::GCParPhases _phase;
+  G1GCPhaseTimes* _phase_times;
+  uint _worker_id;
+  EventGCPhaseParallel _event;
+  bool _must_record;
+
+public:
+  G1GCParPhaseTimesTracker(G1GCPhaseTimes* phase_times, G1GCPhaseTimes::GCParPhases phase, uint worker_id, bool must_record = true);
+  virtual ~G1GCParPhaseTimesTracker();
+};
+
+class G1EvacPhaseTimesTracker : public G1GCParPhaseTimesTracker {
+  Tickspan _total_time;
+  Tickspan _trim_time;
+
+  G1EvacPhaseWithTrimTimeTracker _trim_tracker;
+public:
+  G1EvacPhaseTimesTracker(G1GCPhaseTimes* phase_times, G1ParScanThreadState* pss, G1GCPhaseTimes::GCParPhases phase, uint worker_id);
+  virtual ~G1EvacPhaseTimesTracker();
+};
+
+#endif