1 /*

     2  * Copyright (c) 2016, 2018, Oracle and/or its affiliates. All rights reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.  Oracle designates this

     8  * particular file as subject to the "Classpath" exception as provided

     9  * by Oracle in the LICENSE file that accompanied this code.

    10  *

    11  * This code is distributed in the hope that it will be useful, but WITHOUT

    12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    14  * version 2 for more details (a copy is included in the LICENSE file that

    15  * accompanied this code).

    16  *

    17  * You should have received a copy of the GNU General Public License version

    18  * 2 along with this work; if not, write to the Free Software Foundation,

    19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    20  *

    21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    22  * or visit www.oracle.com if you need additional information or have any

    23  * questions.

    24  */

    25 package jdk.jfr.jvm;

    26 

    27 import java.nio.file.Files;

    28 import java.nio.file.Path;

    29 import java.nio.file.Paths;

    30 import java.util.List;

    31 

    32 import jdk.internal.misc.Unsafe;

    33 import jdk.jfr.consumer.RecordedEvent;

    34 import jdk.jfr.consumer.RecordingFile;

    35 import jdk.test.lib.Asserts;

    36 import jdk.test.lib.process.OutputAnalyzer;

    37 import jdk.test.lib.process.ProcessTools;

    38 

    39 /*

    40  * @test

    41  * @key jfr

    42  * @summary Verifies that data associated with a running recording can be evacuated to an hs_err_pidXXX.jfr when the VM crashes

    43  *

    44  * @library /test/lib

    45  * @modules java.base/jdk.internal.misc

    46  *          java.management

    47  *          jdk.jfr

    48  *

    49  * @run main/othervm --add-exports=java.base/jdk.internal.misc=ALL-UNNAMED jdk.jfr.jvm.TestDumpOnCrash

    50  */

    51 public class TestDumpOnCrash {

    52 

    53     private static final CharSequence LOG_FILE_EXTENSION = ".log";

    54     private static final CharSequence JFR_FILE_EXTENSION = ".jfr";

    55 

    56     static class Crasher {

    57         public static void main(String[] args) {

    58             Unsafe.getUnsafe().putInt(0L, 0);

    59         }

    60     }

    61 

    62     public static void main(String[] args) throws Exception {

    63         processOutput(runProcess());

    64     }

    65 

    66     private static OutputAnalyzer runProcess() throws Exception {

    67         return new OutputAnalyzer(

    68             ProcessTools.createJavaProcessBuilder(true,

    69                 "-Xmx64m",

    70                 "-Xint",

    71                 "-XX:-TransmitErrorReport",

    72                 "-XX:-CreateCoredumpOnCrash",

    73                 "--add-exports=java.base/jdk.internal.misc=ALL-UNNAMED",

    74                 "-XX:StartFlightRecording=dumponexit=true",

    75                 Crasher.class.getName()).start());

    76     }

    77 

    78     private static void processOutput(OutputAnalyzer output) throws Exception {

    79         output.shouldContain("CreateCoredumpOnCrash turned off, no core file dumped");

    80 

    81         final Path jfrEmergencyFilePath = getHsErrJfrPath(output);

    82         Asserts.assertTrue(Files.exists(jfrEmergencyFilePath), "No emergency jfr recording file " + jfrEmergencyFilePath + " exists");

    83         Asserts.assertNotEquals(Files.size(jfrEmergencyFilePath), 0L, "File length 0. Should at least be some bytes");

    84         System.out.printf("File size=%d%n", Files.size(jfrEmergencyFilePath));

    85 

    86         List<RecordedEvent> events = RecordingFile.readAllEvents(jfrEmergencyFilePath);

    87         Asserts.assertFalse(events.isEmpty(), "No event found");

    88         System.out.printf("Found event %s%n", events.get(0).getEventType().getName());

    89     }

    90 

    91     private static Path getHsErrJfrPath(OutputAnalyzer output) throws Exception {

    92         // extract to find hs-err_pid log file location

    93         final String hs_err_pid_log_file = output.firstMatch("# *(\\S*hs_err_pid\\d+\\.log)", 1);

    94         if (hs_err_pid_log_file == null) {

    95             throw new RuntimeException("Did not find hs_err_pid.log file in output.\n");

    96         }

    97         // the dumped out jfr file should have the same name and location but with a .jfr extension

    98         final String hs_err_pid_jfr_file = hs_err_pid_log_file.replace(LOG_FILE_EXTENSION, JFR_FILE_EXTENSION);

    99         return Paths.get(hs_err_pid_jfr_file);

   100     }

   101 }