| /* |
| * 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 |
| * @requires vm.hasJFR |
| * @requires vm.gc == "null" |
| * @library /test/lib /test/jdk |
| * @modules jdk.jfr/jdk.jfr.internal.test |
| * @run main/othervm -XX:TLABSize=2k -Xlog:gc+tlab=trace 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<RecordedEvent> 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<Long> 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]; |
| } |
| } |
| } |