--- /dev/null 2019-02-07 20:54:51.336000000 +0300 +++ new/test/jdk/jfr/event/oldobject/TestFieldInformation.java 2019-02-08 18:33:33.480160369 +0300 @@ -0,0 +1,121 @@ +/* + * 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.lang.reflect.Modifier; +import java.util.HashSet; +import java.util.List; +import java.util.Set; + +import jdk.jfr.Recording; +import jdk.jfr.consumer.RecordedEvent; +import jdk.jfr.consumer.RecordedObject; +import jdk.jfr.internal.test.WhiteBox; +import jdk.test.lib.Asserts; +import jdk.test.lib.jfr.EventNames; +import jdk.test.lib.jfr.Events; + +/** + * @test + * @key jfr + * + * + * @library /lib / + * + * @run main/othervm -XX:TLABSize=2k -XX:+PrintGCDetails -XX:+PrintGC -verbose:class jdk.jfr.event.oldobject.TestFieldInformation + */ +public class TestFieldInformation { + + public static final Object[] testField = new Object[50]; + + 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(); + + addToTestField(); + + recording.stop(); + + List events = Events.fromRecording(recording); + Events.hasEvents(events); + for (RecordedEvent e : events) { + if (hasValidField(e)) { + return; + } + } + System.out.println(events); + Asserts.fail("Could not find old object with field 'testField'"); + } + } + + private static boolean hasValidField(RecordedEvent e) throws Exception { + RecordedObject object = e.getValue("object"); + Set visited = new HashSet<>(); + while (object != null) { + Long address = object.getValue("address"); + if (visited.contains(address)) { + return false; + } + visited.add(address); + RecordedObject referrer = object.getValue("referrer"); + RecordedObject fieldObject = referrer != null ? referrer.getValue("field") : null; + if (fieldObject != null) { + String name = fieldObject.getValue("name"); + if (name != null && name.equals("testField")) { + int modifiers = (short) fieldObject.getValue("modifiers"); + if (!Modifier.isStatic(modifiers)) { + throw new Exception("Field should be static"); + } + if (!Modifier.isPublic(modifiers)) { + throw new Exception("Field should be private"); + } + if (!Modifier.isFinal(modifiers)) { + throw new Exception("Field should be final"); + } + if (Modifier.isTransient(modifiers)) { + throw new Exception("Field should not be transient"); + } + if (Modifier.isVolatile(modifiers)) { + throw new Exception("Field should not be volatile"); + } + return true; + } + } + object = referrer != null ? referrer.getValue("object") : null; + } + return false; + } + + private static void addToTestField() { + for (int i = 0; i < testField.length; i++) { + // Allocate array to trigger sampling code path for interpreter / c1 + testField[i] = new Object[1_000_000]; + } + } +}