| /* |
| * Copyright (c) 2014, 2018, 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.test.lib.Asserts; |
| import jdk.test.lib.jfr.EventNames; |
| import jdk.test.lib.jfr.Events; |
| |
| /** |
| * @test |
| * @key jfr |
| * @requires vm.hasJFR |
| * @library /test/lib /test/jdk |
| * @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()); |
| } |
| } |
| } |