/*

 * Copyright (c) 2013, 2016, 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

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 * questions.

 */

/*

 * @test

 * @bug 8024927

 * @summary Testing address of compressed class pointer space as best as possible.

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

 *          java.management

 */

public class CompressedClassPointers {

    public static void smallHeapTest() throws Exception {

        ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(

            "-XX:+UnlockDiagnosticVMOptions",

            "-XX:SharedBaseAddress=8g",

            "-Xmx128m",

            "-Xlog:gc+metaspace=trace",

            "-XX:+VerifyBeforeGC", "-version");

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

        output.shouldContain("Narrow klass base: 0x0000000000000000");

        output.shouldHaveExitValue(0);

    }

    public static void smallHeapTestWith3G() throws Exception {

        ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(

            "-XX:+UnlockDiagnosticVMOptions",

            "-XX:CompressedClassSpaceSize=3g",

            "-Xmx128m",

            "-Xlog:gc+metaspace=trace",

            "-XX:+VerifyBeforeGC", "-version");

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

        output.shouldContain("Narrow klass base: 0x0000000000000000, Narrow klass shift: 3");

        output.shouldHaveExitValue(0);

    }

    public static void largeHeapTest() throws Exception {

        ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(

            "-XX:+UnlockDiagnosticVMOptions",

            "-Xmx30g",

            "-Xlog:gc+metaspace=trace",

            "-XX:+VerifyBeforeGC", "-version");

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

        output.shouldNotContain("Narrow klass base: 0x0000000000000000");

        output.shouldContain("Narrow klass shift: 0");

        output.shouldHaveExitValue(0);

    }

    public static void largePagesTest() throws Exception {

        ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(

            "-XX:+UnlockDiagnosticVMOptions",

            "-Xmx128m",

            "-XX:+UseLargePages",

            "-Xlog:gc+metaspace=trace",

            "-XX:+VerifyBeforeGC", "-version");

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

        output.shouldContain("Narrow klass base:");

        output.shouldHaveExitValue(0);

    }

    public static void heapBaseMinAddressTest() throws Exception {

        ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(

            "-XX:HeapBaseMinAddress=1m",

            "-Xlog:gc+heap+coops=debug",

            "-version");

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

        output.shouldContain("HeapBaseMinAddress must be at least");

        output.shouldHaveExitValue(0);

    }

    public static void sharingTest() throws Exception {

        // Test small heaps

        ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(

            "-XX:+UnlockDiagnosticVMOptions",

            "-XX:SharedArchiveFile=./CompressedClassPointers.jsa",

            "-Xmx128m",

            "-XX:SharedBaseAddress=8g",

            "-XX:+PrintCompressedOopsMode",

            "-XX:+VerifyBeforeGC",

            "-Xshare:dump");

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

        try {

          output.shouldContain("Loading classes to share");

          output.shouldHaveExitValue(0);

          pb = ProcessTools.createJavaProcessBuilder(

            "-XX:+UnlockDiagnosticVMOptions",

            "-XX:SharedArchiveFile=./CompressedClassPointers.jsa",

            "-Xmx128m",

            "-XX:SharedBaseAddress=8g",

            "-XX:+PrintCompressedOopsMode",

            "-Xshare:on",

            "-version");

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

          output.shouldContain("sharing");

          output.shouldHaveExitValue(0);

        } catch (RuntimeException e) {

          output.shouldContain("Unable to use shared archive");

          output.shouldHaveExitValue(1);

        }

    }

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

        if (!Platform.is64bit()) {

            // Can't test this on 32 bit, just pass

            System.out.println("Skipping test on 32bit");

            return;

        }

        // Solaris 10 can't mmap compressed oops space without a base

        if (Platform.isSolaris()) {

             String name = System.getProperty("os.version");

             if (name.equals("5.10")) {

                 System.out.println("Skipping test on Solaris 10");

                 return;

             }

        }

        smallHeapTest();

        smallHeapTestWith3G();

        largeHeapTest();

        largePagesTest();

        heapBaseMinAddressTest();

        sharingTest();

    }

}