--- /dev/null	2018-06-17 23:18:20.806999507 +0800
+++ new/test/jdk/jfr/event/runtime/TestClassLoaderStatsEvent.java	2019-01-29 11:04:26.945173561 +0800
@@ -0,0 +1,133 @@
+/*
+ * Copyright (c) 2014, 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.runtime;
+
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.IOException;
+import java.nio.ByteBuffer;
+import java.nio.channels.FileChannel;
+import java.util.List;
+
+import jdk.jfr.Recording;
+import jdk.jfr.consumer.RecordedClassLoader;
+import jdk.jfr.consumer.RecordedEvent;
+import jdk.testlibrary.Asserts;
+import jdk.testlibrary.jfr.EventNames;
+import jdk.testlibrary.jfr.Events;
+
+/*
+ * @test
+ * @key jfr
+ * @library /lib/testlibrary
+ * @build jdk.jfr.event.runtime.TestClasses
+ * @run main/othervm jdk.jfr.event.runtime.TestClassLoaderStatsEvent
+ */
+public class TestClassLoaderStatsEvent {
+    private final static String EVENT_NAME = EventNames.ClassLoaderStatistics;
+    private final static String CLASS_LOADER_NAME = "MyDummyClassLoader";
+    private final static String CLASSLOADER_TYPE_NAME = "jdk.jfr.event.runtime.TestClassLoaderStatsEvent$DummyClassLoader";
+    public static DummyClassLoader dummyloader;
+
+    public static void main(String[] args) throws Throwable {
+        createDummyClassLoader(CLASS_LOADER_NAME);
+
+        Recording recording = new Recording();
+        recording.enable(EVENT_NAME);
+        recording.start();
+        recording.stop();
+        List<RecordedEvent> consumer = Events.fromRecording(recording);
+        Events.hasEvents(consumer);
+
+        boolean isAnyFound = false;
+        for (RecordedEvent event : consumer) {
+            System.out.println("Event:" + event);
+            if (Events.assertField(event, "classLoader").getValue() == null) {
+                continue;
+            }
+            RecordedClassLoader recordedClassLoader = event.getValue("classLoader");
+            if (CLASSLOADER_TYPE_NAME.equals(recordedClassLoader.getType().getName())) {
+                //Asserts.assertEquals(CLASS_LOADER_NAME, recordedClassLoader.getName(),
+                //    "Expected class loader name " + CLASS_LOADER_NAME + ", got name " + recordedClassLoader.getName());
+                Events.assertField(event, "classCount").equal(1L);
+                Events.assertField(event, "chunkSize").above(1L);
+                Events.assertField(event, "blockSize").above(1L);
+                Events.assertField(event, "anonymousClassCount").equal(1L);
+                Events.assertField(event, "anonymousChunkSize").above(1L);
+                Events.assertField(event, "anonymousBlockSize").above(1L);
+                isAnyFound = true;
+            }
+        }
+        Asserts.assertTrue(isAnyFound, "No events found");
+    }
+
+    private static void createDummyClassLoader(String name) throws Throwable {
+        dummyloader = new DummyClassLoader(name);
+        Class<?> c = Class.forName(TestClass.class.getName(), true, dummyloader);
+        if (c.getClassLoader() != dummyloader) {
+            throw new RuntimeException("TestClass defined by wrong classloader: " + c.getClassLoader());
+        }
+    }
+
+    public static class DummyClassLoader extends ClassLoader {
+
+        static ByteBuffer readClassFile(String name) {
+            String testClasses = System.getProperty("test.classes");
+            File f = new File(testClasses, name);
+            try (FileInputStream fin = new FileInputStream(f)) {
+                FileChannel fc = fin.getChannel();
+                return fc.map(FileChannel.MapMode.READ_ONLY, 0, fc.size());
+            } catch (IOException e) {
+                throw new RuntimeException("Can't open file: " + f, e);
+            }
+        }
+
+        protected Class<?> loadClass(String name, boolean resolve) throws ClassNotFoundException {
+            Class<?> c;
+            if (TestClass.class.getName().equals(name)) {
+                c = findClass(name);
+                if (resolve) {
+                    resolveClass(c);
+                }
+            } else {
+                c = super.loadClass(name, resolve);
+            }
+            return c;
+        }
+
+        protected Class<?> findClass(String name) throws ClassNotFoundException {
+            if (!TestClass.class.getName().equals(name)) {
+                throw new ClassNotFoundException("Unexpected class: " + name);
+            }
+            return defineClass(name, readClassFile(TestClass.class.getName().replace(".", File.separator) + ".class"), null);
+        }
+
+        public DummyClassLoader(String name) {
+            //super(name, ClassLoader.getSystemClassLoader());
+            super(ClassLoader.getSystemClassLoader());
+        }
+    }
+}