1 /* 2 * Copyright (c) 2013, 2020, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 26 package jdk.jfr.event.runtime; 27 28 import java.time.Duration; 29 import java.util.List; 30 31 import jdk.jfr.Recording; 32 import jdk.jfr.consumer.RecordedClass; 33 import jdk.jfr.consumer.RecordedClassLoader; 34 import jdk.jfr.consumer.RecordedEvent; 35 import jdk.test.lib.Asserts; 36 import jdk.test.lib.jfr.EventNames; 37 import jdk.test.lib.jfr.Events; 38 import jdk.test.lib.jfr.TestClassLoader; 39 40 /** 41 * @test 42 * @key jfr 43 * @requires vm.hasJFR 44 * @library /test/lib /test/jdk 45 * @modules java.base/jdk.internal.misc 46 * @build jdk.jfr.event.runtime.TestClasses 47 * @run main/othervm jdk.jfr.event.runtime.TestClassLoadEvent 48 */ 49 public final class TestClassLoadEvent { 50 51 private final static String TEST_CLASS_NAME = "jdk.jfr.event.runtime.TestClasses"; 52 private final static String BOOT_CLASS_LOADER_NAME = "bootstrap"; 53 private final static String SEARCH_CLASS_NAME = "java.lang.Object"; 54 private final static String SEARCH_PACKAGE_NAME = "java/lang"; 55 private final static String SEARCH_MODULE_NAME = "java.base"; 56 private final static String EVENT_NAME = EventNames.ClassLoad; 57 58 public static void main(String[] args) throws Throwable { 59 Recording recording = new Recording(); 60 recording.enable(EVENT_NAME).withThreshold(Duration.ofMillis(0)); 61 TestClassLoader cl = new TestClassLoader(); 62 recording.start(); 63 cl.loadClass(TEST_CLASS_NAME); 64 recording.stop(); 65 66 List<RecordedEvent> events = Events.fromRecording(recording); 67 boolean isLoaded = false; 68 for (RecordedEvent event : events) { 69 RecordedClass loadedClass = event.getValue("loadedClass"); 70 if (SEARCH_CLASS_NAME.equals(loadedClass.getName())) { 71 System.out.println(event); 72 Events.assertClassPackage(loadedClass, SEARCH_PACKAGE_NAME); 73 Events.assertClassModule(loadedClass, SEARCH_MODULE_NAME); 74 RecordedClassLoader initiatingClassLoader = event.getValue("initiatingClassLoader"); 75 Asserts.assertEquals(cl.getClass().getName(), initiatingClassLoader.getType().getName(), 76 "Expected type " + cl.getClass().getName() + ", got type " + initiatingClassLoader.getType().getName()); 77 RecordedClassLoader definingClassLoader = loadedClass.getClassLoader(); 78 Asserts.assertEquals(BOOT_CLASS_LOADER_NAME, definingClassLoader.getName(), 79 "Expected boot loader to be the defining class loader"); 80 Asserts.assertNull(definingClassLoader.getType(), "boot loader should not have a type"); 81 isLoaded = true; 82 } 83 } 84 Asserts.assertTrue(isLoaded, "No class load event found for class " + SEARCH_CLASS_NAME); 85 } 86 }