--- old/src/share/vm/runtime/timer.cpp	2015-02-18 13:24:53.727911282 +0100
+++ new/src/share/vm/runtime/timer.cpp	2015-02-18 13:24:53.659909264 +0100
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1997, 2014, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1997, 2015, 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
@@ -140,6 +140,20 @@
   }
 }
 
+TrackPhaseTime::TrackPhaseTime(PhaseTimeData *data, uint phase) :
+  _data(data), _phase(phase) {
+  if (_data != NULL && _data->active()) {
+    _last = os::elapsed_counter();
+  }
+}
+
+TrackPhaseTime::~TrackPhaseTime() {
+  if (_data != NULL && _data->active()) {
+    double time = (double)(os::elapsed_counter() - _last) * 1000.0 / os::elapsed_frequency();
+    _data->set_value(_phase, time);
+  }
+}
+
 TraceCPUTime::TraceCPUTime(bool doit,
                bool print_cr,
                outputStream *logfile) :