--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/test/jdk/jdk/jfr/event/oldobject/TestFieldInformation.java Tue May 15 20:24:34 2018 +0200
@@ -0,0 +1,120 @@
+/*
+ * 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.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];
+ }
+ }
+}