/*

 * Copyright (c) 2013, 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.

 *

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package jdk.jfr.event.gc.detailed;

import java.io.IOException;

import java.io.File;

import java.nio.charset.Charset;

import java.nio.file.Files;

import java.nio.file.Path;

import java.nio.file.Paths;

import java.util.Optional;

import jdk.jfr.consumer.RecordedEvent;

import jdk.jfr.consumer.RecordingFile;

import jdk.test.lib.Asserts;

import jdk.test.lib.jfr.EventNames;

/*

 * @test

 * @key jfr

 *

 * @requires vm.gc == "G1" | vm.gc == null

 * @library /test/lib /test/jdk

 * @run main jdk.jfr.event.gc.detailed.TestG1ConcurrentModeFailureEvent

 */

public class TestG1ConcurrentModeFailureEvent {

    private final static String EVENT_NAME = EventNames.ConcurrentModeFailure;

    private final static String EVENT_SETTINGS_FILE = System.getProperty("test.src", ".") + File.separator + "concurrentmodefailure-testsettings.jfc";

    private final static String JFR_FILE = "TestG1ConcurrentModeFailureEvent.jfr";

    private final static int BYTES_TO_ALLOCATE = 1024 * 512;

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

        String[] vmFlags = {"-Xmx512m", "-Xms512m", "-XX:MaxTenuringThreshold=0", "-Xlog:gc*=debug:testG1GC.log",

            "-XX:+UseG1GC", "-XX:+UnlockExperimentalVMOptions", "-XX:-UseFastUnorderedTimeStamps"};

        if (!ExecuteOOMApp.execute(EVENT_SETTINGS_FILE, JFR_FILE, vmFlags, BYTES_TO_ALLOCATE)) {

            System.out.println("OOM happened in the other thread(not test thread). Skip test.");

            // Skip test, process terminates due to the OOME error in the different thread

            return;

        }

        Optional<RecordedEvent> event = RecordingFile.readAllEvents(Paths.get(JFR_FILE)).stream().findFirst();

        if (event.isPresent()) {

            Asserts.assertEquals(EVENT_NAME, event.get().getEventType().getName(), "Wrong event type");

        } else {

            // No event received. Check if test did trigger the event.

            boolean isEventTriggered = fileContainsString("testG1GC.log", "concurrent-mark-abort");

            System.out.println("isEventTriggered=" +isEventTriggered);

            Asserts.assertFalse(isEventTriggered, "Event found in log, but not in JFR");

        }

    }

    private static boolean fileContainsString(String filename, String text) throws IOException {

        Path p = Paths.get(filename);

        for (String line : Files.readAllLines(p, Charset.defaultCharset())) {

            if (line.contains(text)) {

                return true;

            }

        }

        return false;

    }

}