src/share/vm/runtime/timer.cpp

rev 7854 : imported patch 8027962-per-phase-timing-measurements-for-strong-roots-processing
rev 7855 : [mq]: 8027962-bengt-suggestions

@@ -1,7 +1,7 @@
 /*
- * 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
  * under the terms of the GNU General Public License version 2 only, as
  * published by the Free Software Foundation.

@@ -138,10 +138,24 @@
       tty->flush();
     }
   }
 }
 
+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) :
   _active(doit),
   _print_cr(print_cr),