--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/hotspot/share/logging/logDecorations.hpp	Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,68 @@
+/*
+ * Copyright (c) 2015, 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_LOGGING_LOGDECORATIONS_HPP
+#define SHARE_VM_LOGGING_LOGDECORATIONS_HPP
+
+#include "logging/logDecorators.hpp"
+#include "logging/logTagSet.hpp"
+#include "memory/allocation.hpp"
+
+// Temporary object containing the necessary data for a log call's decorations (timestamps, etc).
+class LogDecorations VALUE_OBJ_CLASS_SPEC {
+ public:
+  static const int DecorationsBufferSize = 256;
+ private:
+  char _decorations_buffer[DecorationsBufferSize];
+  char* _decoration_offset[LogDecorators::Count];
+  LogLevelType _level;
+  const LogTagSet& _tagset;
+  jlong _millis;
+  static jlong _vm_start_time_millis;
+  static const char* _host_name;
+
+  jlong java_millis();
+  void create_decorations(const LogDecorators& decorators);
+
+#define DECORATOR(name, abbr) char* create_##name##_decoration(char* pos);
+  DECORATOR_LIST
+#undef DECORATOR
+
+ public:
+  static void initialize(jlong vm_start_time);
+
+  LogDecorations(LogLevelType level, const LogTagSet& tagset, const LogDecorators& decorators);
+
+  void set_level(LogLevelType level) {
+    _level = level;
+  }
+
+  const char* decoration(LogDecorators::Decorator decorator) const {
+    if (decorator == LogDecorators::level_decorator) {
+      return LogLevel::name(_level);
+    }
+    return _decoration_offset[decorator];
+  }
+};
+
+#endif // SHARE_VM_LOGGING_LOGDECORATIONS_HPP