test/jdk/jdk/jfr/startupargs/TestDumpOnExit.java

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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * 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
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 * 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).
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package jdk.jfr.startupargs;

import java.io.IOException;
import java.nio.file.DirectoryStream;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.Iterator;
import java.util.function.Supplier;

import jdk.jfr.consumer.RecordingFile;
import jdk.test.lib.Asserts;
import jdk.test.lib.process.OutputAnalyzer;
import jdk.test.lib.process.ProcessTools;

/*
 * @test
 * @summary Start a FlightRecording with dumponexit. Verify dump exists.
 * @key jfr
 * @library /test/lib
 * @run main/othervm jdk.jfr.startupargs.TestDumpOnExit
 */
public class TestDumpOnExit {

    public static void main(String[] args) throws Exception {
        Path dumpPath = Paths.get(".", "dumped.jfr");

        // Test without security manager and a file name relative to current directory
        testDumponExit(() -> dumpPath,
                "-Xlog:jfr=trace",
                "-XX:StartFlightRecording=filename=./dumped.jfr,dumponexit=true,settings=profile",
                "jdk.jfr.startupargs.TestDumpOnExit$TestMain"
        );
        // Test with security manager and a file name relative to current directory
        testDumponExit(() -> dumpPath,
                "-Xlog:jfr=trace",
                "-XX:StartFlightRecording=filename=./dumped.jfr,dumponexit=true,settings=profile",
                "-Djava.security.manager",
                "jdk.jfr.startupargs.TestDumpOnExit$TestMain"
        );
        // Test with security manager but without a name
        testDumponExit(() -> findJFRFileInCurrentDirectory(),
                "-Xlog:jfr=trace",
                "-XX:StartFlightRecording=dumponexit=true,settings=profile",
                "-Djava.security.manager",
                "jdk.jfr.startupargs.TestDumpOnExit$TestMain"
        );
    }

    private static Path findJFRFileInCurrentDirectory() {
        try {
            DirectoryStream<Path> ds = Files.newDirectoryStream(Paths.get("."), "*pid-*.jfr");
            Iterator<Path> pathIterator = ds.iterator();
            if (!pathIterator.hasNext()) {
                throw new RuntimeException("Could not find jfr file in current directory");
            }
            return pathIterator.next();
        } catch (IOException e) {
            throw new RuntimeException("Could not list jfr file in current directory");
        }
    }

    private static void testDumponExit(Supplier<Path> p,String... args) throws Exception, IOException {
        ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(true, args);
        OutputAnalyzer output = ProcessTools.executeProcess(pb);
        System.out.println(output.getOutput());
        output.shouldHaveExitValue(0);
        Path dump = p.get();
        Asserts.assertTrue(Files.isRegularFile(dump), "No recording dumped " + dump);
        System.out.println("Dumped recording size=" + Files.size(dump));
        Asserts.assertFalse(RecordingFile.readAllEvents(dump).isEmpty(), "No events in dump");
    }

    @SuppressWarnings("unused")
    private static class TestMain {
        public static void main(String[] args) throws Exception {
            System.out.println("Hello from test main");
        }
    }

}