--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/hotspot/src/share/vm/runtime/timerTrace.hpp	Tue Mar 15 14:41:07 2016 +0100
@@ -0,0 +1,80 @@
+/*
+ * Copyright (c) 2016, 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_RUNTIME_TIMERTRACE_HPP
+#define SHARE_VM_RUNTIME_TIMERTRACE_HPP
+
+#include "logging/log.hpp"
+#include "utilities/globalDefinitions.hpp"
+
+// TraceTime is used for tracing the execution time of a block
+// Usage:
+//  {
+//    TraceTime t("some timer", TIMERTRACE_LOG(Info, startuptime, tagX...));
+//    some_code();
+//  }
+//
+
+typedef void (*TraceTimerLogPrintFunc)(const char*, ...);
+
+// We need to explicit take address of Log<>write<> and static cast
+// due to MSVC is not compliant with templates two-phase lookup
+#define TRACETIME_LOG(TT_LEVEL, ...) \
+    log_is_enabled(TT_LEVEL, __VA_ARGS__) ? static_cast<TraceTimerLogPrintFunc>(&Log<LOG_TAGS(__VA_ARGS__)>::write<LogLevel::TT_LEVEL>) : (TraceTimerLogPrintFunc)NULL
+
+class TraceTime: public StackObj {
+ private:
+  bool          _active;    // do timing
+  bool          _verbose;   // report every timing
+  elapsedTimer  _t;         // timer
+  elapsedTimer* _accum;     // accumulator
+  const char*   _title;     // name of timer
+  TraceTimerLogPrintFunc _print;
+
+ public:
+  // Constructors
+  TraceTime(const char* title,
+            bool doit = true);
+
+  TraceTime(const char* title,
+            elapsedTimer* accumulator,
+            bool doit = true,
+            bool verbose = false);
+
+  TraceTime(const char* title,
+            TraceTimerLogPrintFunc ttlpf);
+
+  ~TraceTime();
+
+  // Accessors
+  void set_verbose(bool verbose)  { _verbose = verbose; }
+  bool verbose() const            { return _verbose;    }
+
+  // Activation
+  void suspend()  { if (_active) _t.stop();  }
+  void resume()   { if (_active) _t.start(); }
+};
+
+
+#endif // SHARE_VM_RUNTIME_TIMERTRACE_HPP