--- /dev/null	2019-01-28 17:47:22.000000000 +0800
+++ new/src/share/vm/jfr/recorder/jfrEventSetting.hpp	2019-01-28 17:47:22.000000000 +0800
@@ -0,0 +1,53 @@
+/*
+ * Copyright (c) 2012, 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_RECORDER_JFREVENTSETTING_HPP
+#define SHARE_VM_JFR_RECORDER_JFREVENTSETTING_HPP
+
+#include "jni.h"
+#include "jfr/utilities/jfrAllocation.hpp"
+#include "tracefiles/traceEventControl.hpp"
+#include "tracefiles/traceEventIds.hpp"
+
+//
+// Native event settings as an associative array using the event id as key.
+//
+class JfrEventSetting : AllStatic {
+ private:
+  static JfrNativeSettings _jvm_event_settings;
+  static jfrNativeEventSetting& setting(TraceEventId event_id);
+
+ public:
+  static void set_enabled(jlong event_id, bool enabled);
+  static bool is_enabled(TraceEventId event_id);
+  static void set_stacktrace(jlong event_id, bool enabled);
+  static bool has_stacktrace(TraceEventId event_id);
+  static bool set_threshold(jlong event_id, jlong threshold_ticks);
+  static jlong threshold(TraceEventId event_id);
+  static bool set_cutoff(jlong event_id, jlong cutoff_ticks);
+  static jlong cutoff(TraceEventId event_id);
+  DEBUG_ONLY(static bool bounds_check_event(jlong id);)
+};
+
+#endif //  SHARE_VM_JFR_RECORDER_JFREVENTSETTING_HPP