1 /* 2 * Copyright (c) 2018, 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.oldobject; 27 28 import java.lang.reflect.Array; 29 import java.util.ArrayList; 30 import java.util.List; 31 32 import jdk.jfr.Recording; 33 import jdk.jfr.consumer.RecordedClass; 34 import jdk.jfr.consumer.RecordedEvent; 35 import jdk.jfr.consumer.RecordedObject; 36 import jdk.jfr.internal.test.WhiteBox; 37 import jdk.test.lib.Asserts; 38 import jdk.test.lib.jfr.EventNames; 39 import jdk.test.lib.jfr.Events; 40 41 /* 42 * @test 43 * @key jfr 44 * @requires vm.gc == "null" 45 * @library /test/lib /test/jdk 46 * @modules jdk.jfr/jdk.jfr.internal.test 47 * @run main/othervm -XX:TLABSize=2k jdk.jfr.event.oldobject.TestClassLoaderLeak 48 */ 49 public class TestClassLoaderLeak { 50 51 public static List<Object> classObjects = new ArrayList<>(OldObjects.MIN_SIZE); 52 53 public static void main(String[] args) throws Exception { 54 WhiteBox.setWriteAllObjectSamples(true); 55 56 try (Recording r = new Recording()) { 57 r.enable(EventNames.OldObjectSample).withStackTrace().with("cutoff", "infinity"); 58 r.start(); 59 TestClassLoader testClassLoader = new TestClassLoader(); 60 for (Class<?> clazz : testClassLoader.loadClasses(OldObjects.MIN_SIZE / 20)) { 61 // Allocate array to trigger sampling code path for interpreter / c1 62 for (int i = 0; i < 20; i++) { 63 Object classArray = Array.newInstance(clazz, 20); 64 Array.set(classArray, i, clazz.newInstance()); 65 classObjects.add(classArray); 66 } 67 } 68 r.stop(); 69 List<RecordedEvent> events = Events.fromRecording(r); 70 Events.hasEvents(events); 71 for (RecordedEvent e : events) { 72 RecordedObject object = e.getValue("object"); 73 RecordedClass rc = object.getValue("type"); 74 if (rc.getName().contains("TestClass")) { 75 return; 76 } 77 } 78 Asserts.fail("Could not find class leak"); 79 } 80 } 81 }