--- /dev/null 2019-02-07 20:54:51.336000000 +0300 +++ new/test/jdk/jfr/event/oldobject/TestArrayInformation.java 2019-02-08 18:33:32.744185997 +0300 @@ -0,0 +1,125 @@ +/* + * Copyright (c) 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.oldobject; + +import java.util.ArrayList; +import java.util.List; + +import jdk.jfr.Recording; +import jdk.jfr.consumer.RecordedClass; +import jdk.jfr.consumer.RecordedEvent; +import jdk.jfr.consumer.RecordedObject; +import jdk.jfr.internal.test.WhiteBox; +import jdk.test.lib.jfr.EventNames; +import jdk.test.lib.jfr.Events; + +/** + * @test + * @key jfr + * + * + * @library /lib / + * + * @run main/othervm -XX:TLABSize=2k jdk.jfr.event.oldobject.TestArrayInformation + */ +public class TestArrayInformation { + + private static class ArrayLeak { + } + + private static final int CHAIN_DEPTH = 50; + private static final int ARRAY_SIZE = 52; + private static final int ARRAY_INDEX = 26; + + public static List leak = new ArrayList<>(25); + + public static void main(String[] args) throws Exception { + WhiteBox.setWriteAllObjectSamples(true); + + try (Recording recording = new Recording()) { + recording.enable(EventNames.OldObjectSample).withoutStackTrace().with("cutoff", "infinity"); + recording.start(); + for(int i = 0; i < 25; i++) { + leak.add( buildNestedArray(CHAIN_DEPTH)); + } + recording.stop(); + List events = Events.fromRecording(recording); + Events.hasEvents(events); + verifyObjectArray(events); + } + } + + private static void verifyObjectArray(List events) throws Exception { + for (RecordedEvent e : events) { + RecordedObject object = e.getValue("object"); + RecordedClass objectType = object.getValue("type"); + RecordedObject referrer = object.getValue("referrer"); + System.out.println(objectType.getName()); + if (objectType.getName().equals(ArrayLeak[].class.getName())) { + for (int i = 0; i < CHAIN_DEPTH; i++) { + object = referrer.getValue("object"); + if (object == null) { + throw new Exception("Expected referrer object"); + } + objectType = object.getValue("type"); + if (!objectType.getName().equals(Object[].class.getName())) { + throw new Exception("Expect array class to be named " + Object[].class + " but found " + objectType.getName()); + } + RecordedObject field = referrer.getValue("field"); + if (field != null) { + throw new Exception("Didn't expect to find field"); + } + RecordedObject array = referrer.getValue("array"); + if (array == null) { + throw new Exception("Expected array object, but got null"); + } + int index = referrer.getValue("array.index"); + if (index != ARRAY_INDEX) { + throw new Exception("Expected array index: " + ARRAY_INDEX + ", but got " + index); + } + int size = referrer.getValue("array.size"); + if (size != ARRAY_SIZE) { + throw new Exception("Expected array size: " + ARRAY_SIZE + ", but got " + size); + } + referrer = object.getValue("referrer"); + } + return; + } + } + throw new Exception("Could not find event with " + ArrayLeak[].class + " as (leak) object"); + } + + private static Object buildNestedArray(int depth) { + if (depth > 0) { + Object[] array = new Object[ARRAY_SIZE]; + array[ARRAY_INDEX] = buildNestedArray(depth - 1); + return array; + } else { + return new ArrayLeak[OldObjects.MIN_SIZE]; + } + } + +}