/*

 * 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

 * @bug 8024927

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

 * @library /testlibrary

 */

import com.oracle.java.testlibrary.*;

public class CompressedClassPointers {

    public static void smallHeapTest() throws Exception {

        ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(

            "-XX:+UnlockDiagnosticVMOptions",

            "-XX:SharedBaseAddress=8g",

            "-Xmx128m",

            "-XX:+PrintCompressedOopsMode",

            "-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",

            "-XX:+PrintCompressedOopsMode",

            "-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",

            "-XX:+PrintCompressedOopsMode",

            "-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",

            "-XX:+PrintCompressedOopsMode",

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

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

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

        output.shouldHaveExitValue(0);

    }

    public static void sharingTest() throws Exception {

        // Test small heaps

        ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(

            "-XX:+UnlockDiagnosticVMOptions",

            "-XX:SharedArchiveFile=./sample.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=./sample.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);

        }

    }

}