--- /dev/null	2018-06-17 23:18:20.806999507 +0800
+++ new/test/jdk/jfr/event/gc/refstat/RefStatEvent.java	2019-01-29 11:03:35.270680739 +0800
@@ -0,0 +1,102 @@
+/*
+ * Copyright (c) 2013, 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.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * 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.
+ */
+
+package jdk.jfr.event.gc.refstat;
+
+import java.time.Duration;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+import java.util.stream.Collectors;
+
+import jdk.jfr.Recording;
+import jdk.jfr.consumer.RecordedEvent;
+import jdk.testlibrary.Asserts;
+import jdk.testlibrary.jfr.EventNames;
+import jdk.testlibrary.jfr.Events;
+import jdk.testlibrary.jfr.GCHelper;
+
+
+public class RefStatEvent {
+
+    private static final String gcEventPath = EventNames.GarbageCollection;
+    private static final String refStatsEventPath = EventNames.GCReferenceStatistics;
+    public static byte[] garbage;
+
+    public static void test(String gcName) throws Exception {
+        Recording recording = new Recording();
+        recording.enable(refStatsEventPath).withThreshold(Duration.ofMillis(0));
+        recording.enable(gcEventPath).withThreshold(Duration.ofMillis(0));
+
+        recording.start();
+        GCHelper.callSystemGc(6, true);
+        recording.stop();
+
+        System.out.println("gcName=" + gcName);
+        List<RecordedEvent> events = GCHelper.removeFirstAndLastGC(Events.fromRecording(recording));
+        Events.hasEvents(events);
+        for (RecordedEvent event : events) {
+            System.out.println("Event: " + event);
+        }
+
+        for (RecordedEvent event : events) {
+            if (!Events.isEventType(event, gcEventPath)) {
+                continue;
+            }
+            System.out.println("Event: " + event);
+            final int gcId = Events.assertField(event, "gcId").getValue();
+            final String name = Events.assertField(event, "name").notEmpty().getValue();
+            if (gcName.equals(name)) {
+                verifyRefStatEvents(events, gcId);
+            }
+        }
+    }
+
+    // Check that we have a refStat event for each type for this GC.
+    private static void verifyRefStatEvents(List<RecordedEvent> events, int gcId) {
+        List<String> expectedTypes = Arrays.asList("Soft reference", "Weak reference", "Final reference", "Phantom reference");
+        List<String> actualTypes = new ArrayList<>();
+        try {
+            for (RecordedEvent event : events) {
+                if (!Events.isEventType(event, refStatsEventPath)) {
+                    continue;
+                }
+                Events.assertField(event, "count").atLeast(0L);
+                if (Events.assertField(event, "gcId").isEqual(gcId)) {
+                    actualTypes.add(Events.assertField(event, "type").notEmpty().getValue());
+                }
+            }
+
+            Asserts.assertEquals(actualTypes.size(), expectedTypes.size(), "Wrong number of refStat events");
+            Asserts.assertTrue(expectedTypes.containsAll(actualTypes), "Found unknown refStat types");
+            Asserts.assertTrue(actualTypes.containsAll(expectedTypes), "Missning refStat types");
+        } catch (Exception e) {
+            System.out.println("Expected refStatTypes: " + expectedTypes.stream().collect(Collectors.joining(", ")));
+            System.out.println("Got refStatTypes: " + actualTypes.stream().collect(Collectors.joining(", ")));
+            throw e;
+        }
+    }
+
+}