--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/hotspot/share/logging/logLevel.hpp	Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,81 @@
+/*
+ * Copyright (c) 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.
+ *
+ * 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_LOGLEVEL_HPP
+#define SHARE_VM_LOGGING_LOGLEVEL_HPP
+
+#include "memory/allocation.hpp"
+#include "utilities/macros.hpp"
+
+// The list of log levels:
+//
+//  trace   - Finest level of logging. Use for extensive/noisy
+//            logging that can give slow-down when enabled.
+//
+//  debug   - A finer level of logging. Use for semi-noisy
+//            logging that is does not fit the info level.
+//
+//  info    - General level of logging. Use for significant
+//            events and/or informative summaries.
+//
+//  warning - Important messages that are not strictly errors.
+//
+//  error   - Critical messages caused by errors.
+//
+#define LOG_LEVEL_LIST \
+  LOG_LEVEL(Trace, trace) \
+  LOG_LEVEL(Debug, debug) \
+  LOG_LEVEL(Info, info) \
+  LOG_LEVEL(Warning, warning) \
+  LOG_LEVEL(Error, error)
+
+class LogLevel : public AllStatic {
+ public:
+  enum type {
+    Off,
+#define LOG_LEVEL(name, printname) name,
+    LOG_LEVEL_LIST
+#undef LOG_LEVEL
+    Count,
+    Invalid,
+    NotMentioned,
+    First = Off + 1,
+    Last = Error,
+    Default = Warning,
+    Unspecified = Info
+  };
+
+  static const char *name(LogLevel::type level) {
+    assert(level >= 0 && level < LogLevel::Count, "Invalid level (enum value %d).", level);
+    return _name[level];
+  }
+
+  static LogLevel::type from_string(const char* str);
+
+ private:
+  static const char* _name[];
+};
+
+typedef LogLevel::type LogLevelType;
+
+#endif // SHARE_VM_LOGGING_LOGLEVEL_HPP