/*

 * Copyright (c) 2013, 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 CdsSameObjectAlignment

 * @summary Testing CDS (class data sharing) using varying object alignment.

 *          Using same object alignment for each dump/load pair

 * @library /testlibrary

 */

import com.oracle.java.testlibrary.*;

public class CdsSameObjectAlignment {

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

        String nativeWordSize = System.getProperty("sun.arch.data.model");

        if (!Platform.is64bit()) {

            System.out.println("ObjectAlignmentInBytes for CDS is only " +

                "supported on 64bit platforms; this plaform is " +

                nativeWordSize);

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

        } else {

            dumpAndLoadSharedArchive(8);

            dumpAndLoadSharedArchive(16);

            dumpAndLoadSharedArchive(32);

            dumpAndLoadSharedArchive(64);

        }

    }

    private static void

    dumpAndLoadSharedArchive(int objectAlignmentInBytes) throws Exception {

        String objectAlignmentArg = "-XX:ObjectAlignmentInBytes="

            + objectAlignmentInBytes;

        System.out.println("dumpAndLoadSharedArchive(): objectAlignmentInBytes = "

            + objectAlignmentInBytes);

        // create shared archive

        ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(

            "-XX:+UnlockDiagnosticVMOptions",

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

            "-Xshare:dump",

            objectAlignmentArg);

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

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

        output.shouldHaveExitValue(0);

        // run using the shared archive

        pb = ProcessTools.createJavaProcessBuilder(

            "-XX:+UnlockDiagnosticVMOptions",

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

            "-Xshare:on",

            objectAlignmentArg,

            "-version");

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

        try {

            output.shouldContain("sharing");

            output.shouldHaveExitValue(0);

        } catch (RuntimeException e) {

            // CDS uses absolute addresses for performance.

            // It will try to reserve memory at a specific address;

            // there is a chance such reservation will fail

            // If it does, it is NOT considered a failure of the feature,

            // rather a possible expected outcome, though not likely

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

            output.shouldHaveExitValue(1);

        }

    }

}