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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

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 *

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 * version 2 for more details (a copy is included in the LICENSE file that

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 *

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 * 2 along with this work; if not, write to the Free Software Foundation,

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 *

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 */

/*

 * @test

 * @bug 8024927

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

 * @requires vm.bits == 64 & vm.opt.final.UseCompressedOops == true

 * @library /test/lib

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

 *          java.management

 * @run main CompressedClassPointers

 */

import jdk.test.lib.Platform;

import jdk.test.lib.process.ProcessTools;

import jdk.test.lib.process.OutputAnalyzer;

import jtreg.SkippedException;

public class CompressedClassPointers {

    public static void smallHeapTest() throws Exception {

        ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(

            "-XX:+UnlockDiagnosticVMOptions",

            "-XX:SharedBaseAddress=8g",

            "-Xmx128m",

            "-Xlog:gc+metaspace=trace",

            "-Xshare:off",

            "-Xlog:cds=trace",

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

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

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

        output.shouldHaveExitValue(0);

    }

        ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(

            "-XX:+UnlockDiagnosticVMOptions",

            "-Xmx128m",

            "-Xlog:gc+metaspace=trace",

            "-Xshare:off",

            "-Xlog:cds=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",

            "-XX:+UnlockExperimentalVMOptions",

            "-Xmx30g",

            "-XX:-UseAOT", // AOT explicitly set klass shift to 3.

            "-Xlog:gc+metaspace=trace",

            "-Xshare:off",

            "-Xlog:cds=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());

        if (output.firstMatch("Shared spaces are not supported in this VM") != null) {

            return;

        }

        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.isSolaris()) {

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

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

                throw new SkippedException("Solaris 10 can't mmap compressed oops space without a base");

             }

        }

        smallHeapTest();

        largeHeapTest();

        largePagesTest();

        heapBaseMinAddressTest();

        sharingTest();

    }

}