/*

 * Copyright (c) 2014, 2015, 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.

 *

 * 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.

 */

/*

 * @test TestGCLogMessages

 * @bug 8035406 8027295 8035398 8019342 8027959 8048179 8027962 8069330

 * includes the expected necessary messages.

 * @key gc

 * @library /testlibrary

 * @modules java.base/sun.misc

 *          java.management

 */

import jdk.test.lib.ProcessTools;

import jdk.test.lib.OutputAnalyzer;

public class TestGCLogMessages {

    private enum Level {

        public boolean lessOrEqualTo(Level other) {

            return this.compareTo(other) < 0;

        }

    }

    private class LogMessageWithLevel {

        String message;

        Level level;

        public LogMessageWithLevel(String message, Level level) {

            this.message = message;

            this.level = level;

        }

    };

    private LogMessageWithLevel allLogMessages[] = new LogMessageWithLevel[] {

        // Update RS

        // Ext Root Scan

        // Redirty Cards

        // Misc Top-level

        // Free CSet

        // Humongous Eager Reclaim

    };

    void checkMessagesAtLevel(OutputAnalyzer output, LogMessageWithLevel messages[], Level level) throws Exception {

        for (LogMessageWithLevel l : messages) {

            if (level.lessOrEqualTo(l.level)) {

                output.shouldNotContain(l.message);

            } else {

                output.shouldContain(l.message);

            }

        }

    }

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

        new TestGCLogMessages().testNormalLogs();

        new TestGCLogMessages().testWithToSpaceExhaustionLogs();

    }

    private void testNormalLogs() throws Exception {

        ProcessBuilder pb = ProcessTools.createJavaProcessBuilder("-XX:+UseG1GC",

                                                                  "-Xmx10M",

                                                                  GCTest.class.getName());

        OutputAnalyzer output = new OutputAnalyzer(pb.start());

        checkMessagesAtLevel(output, allLogMessages, Level.OFF);

        output.shouldHaveExitValue(0);

        pb = ProcessTools.createJavaProcessBuilder("-XX:+UseG1GC",

                                                   "-XX:+UseStringDeduplication",

                                                   "-Xmx10M",

                                                   GCTest.class.getName());

        output = new OutputAnalyzer(pb.start());

        pb = ProcessTools.createJavaProcessBuilder("-XX:+UseG1GC",

                                                   "-XX:+UseStringDeduplication",

                                                   "-Xmx10M",

                                                   GCTest.class.getName());

        output = new OutputAnalyzer(pb.start());

        output.shouldHaveExitValue(0);

    }

    LogMessageWithLevel exhFailureMessages[] = new LogMessageWithLevel[] {

    };

    private void testWithToSpaceExhaustionLogs() throws Exception {

        ProcessBuilder pb = ProcessTools.createJavaProcessBuilder("-XX:+UseG1GC",

                                                                  "-Xmx32M",

                                                                  "-Xmn16M",

                                                                  GCTestWithToSpaceExhaustion.class.getName());

        OutputAnalyzer output = new OutputAnalyzer(pb.start());

        output.shouldHaveExitValue(0);

        pb = ProcessTools.createJavaProcessBuilder("-XX:+UseG1GC",

                                                   "-Xmx32M",

                                                   "-Xmn16M",

                                                   GCTestWithToSpaceExhaustion.class.getName());

        output = new OutputAnalyzer(pb.start());

        output.shouldHaveExitValue(0);

    }

    static class GCTest {

        private static byte[] garbage;

        public static void main(String [] args) {

            System.out.println("Creating garbage");

            // create 128MB of garbage. This should result in at least one GC

            for (int i = 0; i < 1024; i++) {

                garbage = new byte[128 * 1024];

            }

            System.out.println("Done");

        }

    }

    static class GCTestWithToSpaceExhaustion {

        private static byte[] garbage;

        private static byte[] largeObject;

        public static void main(String [] args) {

            largeObject = new byte[16*1024*1024];

            System.out.println("Creating garbage");

            // create 128MB of garbage. This should result in at least one GC,

            // some of them with to-space exhaustion.

            for (int i = 0; i < 1024; i++) {

                garbage = new byte[128 * 1024];

            }

            System.out.println("Done");

        }

    }

}