/*

 * Copyright (c) 2019, Oracle and/or its affiliates. All rights reserved.

 * Copyright (c) 2019, Twitter, Inc.

 * 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.

 *

 */

package gc.metaspace;

import jdk.test.lib.Platform;

import jdk.test.lib.process.ProcessTools;

import jdk.test.lib.process.OutputAnalyzer;

import java.util.ArrayList;

import java.util.List;

/* @test TestSizeTransitionsSerial

 * @key gc

 * @requires vm.gc.Serial

 * @summary Tests that the metaspace size transition logging is done correctly.

 * @library /test/lib

 * @run driver gc.metaspace.TestSizeTransitions false -XX:+UseSerialGC

 * @run driver gc.metaspace.TestSizeTransitions true  -XX:+UseSerialGC

 */

/* @test TestSizeTransitionsParallel

 * @key gc

 * @requires vm.gc.Parallel

 * @summary Tests that the metaspace size transition logging is done correctly.

 * @library /test/lib

 * @run driver gc.metaspace.TestSizeTransitions false -XX:+UseParallelGC

 * @run driver gc.metaspace.TestSizeTransitions true  -XX:+UseParallelGC

 */

/* @test TestSizeTransitionsG1

 * @key gc

 * @requires vm.gc.G1

 * @summary Tests that the metaspace size transition logging is done correctly.

 * @library /test/lib

 * @run driver gc.metaspace.TestSizeTransitions false -XX:+UseG1GC

 * @run driver gc.metaspace.TestSizeTransitions true  -XX:+UseG1GC

 */

/* @test TestSizeTransitionsCMS

 * @key gc

 * @requires vm.gc.ConcMarkSweep

 * @summary Tests that the metaspace size transition logging is done correctly.

 * @library /test/lib

 * @run driver gc.metaspace.TestSizeTransitions false -XX:+UseConcMarkSweepGC

 * @run driver gc.metaspace.TestSizeTransitions true  -XX:+UseConcMarkSweepGC

 */

public class TestSizeTransitions {

  public static class Run {

    public static void main(String... args) throws Exception {

      System.out.println("Run started.");

      // easiest way to generate a metaspace transition is to ask for a full GC

      System.gc();

      System.out.println("Run finished.");

    }

  }

  // matches the log tags

  //   e.g., [0.043s][info][gc]

  private static final String LOG_TAGS_REGEX = "(\\[.*\\])+ ";

  // matches a size transition

  //   e.g., 177K(4864K)->177K(4864K)

  private static final String SIZE_TRANSITION_REGEX = "\\d+K\\(\\d+K\\)->\\d+K\\(\\d+K\\)";

  // matches -coops metaspace size transitions

  private static final String NO_COOPS_REGEX =

    String.format("^%s.* Metaspace: %s$",

                  LOG_TAGS_REGEX,

                  SIZE_TRANSITION_REGEX);

  // matches +coops metaspace size transitions

  private static final String COOPS_REGEX =

    String.format("^%s.* Metaspace: %s NonClass: %s Class: %s$",

                  LOG_TAGS_REGEX,

                  SIZE_TRANSITION_REGEX,

                  SIZE_TRANSITION_REGEX,

                  SIZE_TRANSITION_REGEX);

  public static void main(String... args) throws Exception {

    // args: <use-coops> <gc-arg>

    if (args.length != 2) {

      throw new RuntimeException("wrong number of args: " + args.length);

    }

    final boolean hasCoops = Platform.is64bit();

    final boolean useCoops = Boolean.parseBoolean(args[0]);

    final String gcArg = args[1];

    if (!hasCoops && useCoops) {

       // No need to run this configuration.

       System.out.println("Skipping test.");

       return;

    }

    List<String> jvmArgs = new ArrayList<>();

    if (hasCoops) {

      jvmArgs.add(useCoops ? "-XX:+UseCompressedOops" : "-XX:-UseCompressedOops");

    }

    jvmArgs.add(gcArg);

    jvmArgs.add("-Xmx256m");

    jvmArgs.add("-Xlog:gc,gc+metaspace=info");

    jvmArgs.add(TestSizeTransitions.Run.class.getName());

    System.out.println("JVM args:");

    for (String a : jvmArgs) {

      System.out.println("  " + a);

    }

    final ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(jvmArgs.toArray(new String[0]));

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

    System.out.println(output.getStdout());

    output.shouldHaveExitValue(0);

    if (useCoops) {

      output.stdoutShouldMatch(COOPS_REGEX);

      output.stdoutShouldNotMatch(NO_COOPS_REGEX);

    } else {

      output.stdoutShouldMatch(NO_COOPS_REGEX);

      output.stdoutShouldNotMatch(COOPS_REGEX);

    }

  }

}