--- /dev/null 2019-02-07 20:54:51.336000000 +0300 +++ new/test/jdk/jfr/jcmd/TestJcmdDump.java 2019-02-08 18:33:43.147823849 +0300 @@ -0,0 +1,172 @@ +/* + * Copyright (c) 2015, 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.jcmd; + +import java.io.File; +import java.nio.file.Files; +import java.util.ArrayList; +import java.util.List; +import java.util.function.Predicate; + +import jdk.jfr.Event; +import jdk.jfr.Recording; +import jdk.jfr.consumer.RecordedEvent; +import jdk.jfr.consumer.RecordingFile; +import jdk.test.lib.jfr.EventNames; +import jdk.test.lib.process.OutputAnalyzer; + +/** + * @test + * @summary The test verifies JFR.dump command + * @key jfr + * + * @library /lib / + * @run main/othervm -XX:FlightRecorderOptions:maxchunksize=1M jdk.jfr.jcmd.TestJcmdDump + */ +public class TestJcmdDump { + + static class StoppedEvent extends Event { + } + static class RunningEvent extends Event { + } + + private static final String[] names = { null, "r1" }; + private static final boolean booleanValues[] = { true, false }; + + public static void main(String[] args) throws Exception { + + // Create a stopped recording in the repository to complicate things + Recording r = new Recording(); + r.start(); + StoppedEvent de = new StoppedEvent(); + de.commit(); + r.stop(); + + // The implementation of JFR.dump touch code that can't be executed using the + // Java API. It is therefore important to try all combinations. The + // implementation is non-trivial and depends on the combination + for (String name : names) { + for (boolean disk : booleanValues) { + try (Recording r1 = new Recording(); Recording r2 = new Recording()) { + System.out.println(); + System.out.println(); + System.out.println("Starting recordings with disk=" + disk); + r1.setToDisk(disk); + // To complicate things, only enable OldObjectSample for one recording + r1.enable(EventNames.OldObjectSample).withoutStackTrace(); + r1.setName("r1"); + r2.setToDisk(disk); + r2.setName("r2"); + r1.start(); + r2.start(); + + // Expect no path to GC roots + jfrDump(Boolean.FALSE, name, disk, rootCount -> rootCount == 0); + // Expect path to GC roots + jfrDump(null, name, disk, rootCount -> rootCount == 0); + // Expect at least one path to a GC root + jfrDump(Boolean.TRUE, name, disk, rootCount -> rootCount > 0); + } + } + } + r.close(); // release recording data from the stopped recording + } + + private static void jfrDump(Boolean pathToGCRoots, String name, boolean disk, Predicate successPredicate) throws Exception { + List leakList = new ArrayList<>(); + leakList.add(new Object[1000_0000]); + System.gc(); + while (true) { + RunningEvent re = new RunningEvent(); + re.commit(); + leakList.add(new Object[1000_0000]); + leakList.add(new Object[1000_0000]); + leakList.add(new Object[1000_0000]); + System.gc(); // This will shorten time for object to be emitted. + File recording = new File("TestJCMdDump.jfr"); + String[] params = buildParameters(pathToGCRoots, name, recording); + OutputAnalyzer output = JcmdHelper.jcmd(params); + JcmdAsserts.assertRecordingDumpedToFile(output, recording); + int rootCount = 0; + int oldObjectCount = 0; + int stoppedEventCount = 0; + int runningEventCount = 0; + for (RecordedEvent e : RecordingFile.readAllEvents(recording.toPath())) { + if (e.getEventType().getName().equals(EventNames.OldObjectSample)) { + if (e.getValue("root") != null) { + rootCount++; + } + oldObjectCount++; + } + if (e.getEventType().getName().equals(StoppedEvent.class.getName())) { + stoppedEventCount++; + } + if (e.getEventType().getName().equals(RunningEvent.class.getName())) { + runningEventCount++; + } + } + System.out.println("Name: " + name); + System.out.println("Disk: " + disk); + System.out.println("Path to GC roots: " + pathToGCRoots); + System.out.println("Old Objects: " + oldObjectCount); + System.out.println("Root objects: "+ rootCount); + System.out.println("Stopped events: "+ stoppedEventCount); + System.out.println("Running events: "+ runningEventCount); + + System.out.println(); + if (runningEventCount == 0) { + throw new Exception("Missing event from running recording"); + } + if (name == null && stoppedEventCount == 0) { + throw new Exception("Missing event from stopped recording"); + } + if (name != null && stoppedEventCount > 0) { + throw new Exception("Stopped event should not be part of dump"); + } + if (oldObjectCount != 0 && successPredicate.test(rootCount)) { + return; + } + System.out.println(); + System.out.println(); + System.out.println(); + System.out.println("************* Retrying! **************"); + Files.delete(recording.toPath()); + } + } + + private static String[] buildParameters(Boolean pathToGCRoots, String name, File recording) { + List params = new ArrayList<>(); + params.add("JFR.dump"); + params.add("filename=" + recording.getAbsolutePath()); + if (pathToGCRoots != null) { // if path-to-gc-roots is omitted, default is used (disabled). + params.add("path-to-gc-roots=" + pathToGCRoots); + } + if (name != null) { // if name is omitted, all recordings will be dumped + params.add("name=" + name); + } + return params.toArray(new String[0]); + } +}