--- /dev/null	2019-01-28 17:48:14.000000000 +0800
+++ new/src/share/vm/jfr/utilities/jfrLog.hpp	2019-01-28 17:48:14.000000000 +0800
@@ -0,0 +1,66 @@
+/*
+ * Copyright (c) 1997, 2019, 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_JFR_UTILITIES_JFRVMLOG_HPP
+#define SHARE_VM_JFR_UTILITIES_JFRVMLOG_HPP
+
+#include "runtime/os.hpp"
+#include "utilities/debug.hpp"
+
+#define log_error(...)     (!log_is_enabled(Error, __VA_ARGS__))    ? (void)0 : tty->print_cr
+#define log_warning(...)   (!log_is_enabled(Warning, __VA_ARGS__))  ? (void)0 : tty->print_cr
+#define log_info(...)      (!log_is_enabled(Info, __VA_ARGS__))     ? (void)0 : tty->print_cr
+#define log_debug(...)     (!log_is_enabled(Debug, __VA_ARGS__))    ? (void)0 : tty->print_cr
+#define log_trace(...)     (!log_is_enabled(Trace, __VA_ARGS__))    ? (void)0 : tty->print_cr
+
+#define log_is_enabled(level, ...) (LogImpl::is_level(LogLevel::level))
+
+class LogLevel : public AllStatic {
+ public:
+   enum type {
+     Off,
+     Trace,
+     Debug,
+     Info,
+     Warning,
+     Error
+   };
+};
+typedef LogLevel::type LogLevelType;
+
+class LogImpl {
+ public:
+
+  LogImpl() {}
+
+  static bool is_level(LogLevelType level) {
+    if (PrintJFRLog || level == (jint)LogLevel::Error) {
+      return true;
+    }
+
+    return false;
+  }
+};
+
+#endif