/*

 * Copyright (c) 2014, 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 TestPrintGCDetails

 * @summary Ensure that the PrintGCDetails output for a minor GC with G1

 * includes the expected necessary messages.

 * @key gc

 * @library /testlibrary

 */

import com.oracle.java.testlibrary.ProcessTools;

import com.oracle.java.testlibrary.OutputAnalyzer;

public class TestGCLogMessages {

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

    testNormalLogs();

    testWithToSpaceExhaustionLogs();

  }

  private static void testNormalLogs() throws Exception {

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

                                                              "-Xmx10M",

                                                              GCTest.class.getName());

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

    output.shouldNotContain("[Redirty Cards");

    output.shouldNotContain("[Code Root Purge");

    output.shouldNotContain("[String Dedup Fixup");

    output.shouldNotContain("[Young Free CSet");

    output.shouldNotContain("[Non-Young Free CSet");

    output.shouldHaveExitValue(0);

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

                                               "-XX:+UseStringDeduplication",

                                               "-Xmx10M",

                                               "-XX:+PrintGCDetails",

                                               GCTest.class.getName());

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

    output.shouldContain("[Redirty Cards");

    output.shouldContain("[Code Root Purge");

    output.shouldContain("[String Dedup Fixup");

    output.shouldNotContain("[Young Free CSet");

    output.shouldNotContain("[Non-Young Free CSet");

    output.shouldHaveExitValue(0);

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

                                               "-XX:+UseStringDeduplication",

                                               "-Xmx10M",

                                               "-XX:+PrintGCDetails",

                                               "-XX:+UnlockExperimentalVMOptions",

                                               "-XX:G1LogLevel=finest",

                                               GCTest.class.getName());

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

    output.shouldContain("[Redirty Cards");

    output.shouldContain("[Code Root Purge");

    output.shouldContain("[String Dedup Fixup");

    output.shouldContain("[Young Free CSet");

    output.shouldContain("[Non-Young Free CSet");

    // also check evacuation failure messages once

    output.shouldNotContain("[Evacuation Failure");

    output.shouldNotContain("[Recalculate Used");

    output.shouldNotContain("[Remove Self Forwards");

    output.shouldNotContain("[Restore RemSet");

    output.shouldHaveExitValue(0);

  }

  private static void testWithToSpaceExhaustionLogs() throws Exception {

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

                                               "-Xmx10M",

                                               "-Xmn5M",

                                               "-XX:+PrintGCDetails",

                                               GCTestWithToSpaceExhaustion.class.getName());

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

    output.shouldContain("[Evacuation Failure");

    output.shouldNotContain("[Recalculate Used");

    output.shouldNotContain("[Remove Self Forwards");

    output.shouldNotContain("[Restore RemSet");

    output.shouldHaveExitValue(0);

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

                                               "-Xmx10M",

                                               "-Xmn5M",

                                               "-XX:+PrintGCDetails",

                                               "-XX:+UnlockExperimentalVMOptions",

                                               "-XX:G1LogLevel=finest",

                                               GCTestWithToSpaceExhaustion.class.getName());

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

    output.shouldContain("[Evacuation Failure");

    output.shouldContain("[Recalculate Used");

    output.shouldContain("[Remove Self Forwards");

    output.shouldContain("[Restore RemSet");

    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[5*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");

    }

  }

}