/*

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 * 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.

 *

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 */

/**

 * @test Default CDS archive

 * @summary Sharing should be enabled by default on supported platform/binaries.

 *          No -Xshare:dump is needed. No -Xshare:auto or -Xshare:on in needed.

 *          Verify a set of well-known shared classes.

 * @requires vm.cds

 * @library /test/lib

 * @build sun.hotspot.WhiteBox

 * @run driver ClassFileInstaller sun.hotspot.WhiteBox

 * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions

 *      -XX:+WhiteBoxAPI CheckSharingWithDefaultArchive -showversion

 */

import jdk.test.lib.Platform;

import jtreg.SkippedException;

import sun.hotspot.WhiteBox;

public class CheckSharingWithDefaultArchive {

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

        if (!Platform.isDefaultCDSArchiveSupported()) {

            throw new SkippedException("Supported platform");

        }

        WhiteBox wb = WhiteBox.getWhiteBox();

        String classes[] = {"java.lang.Object",

                            "java.lang.String",

                            "java.lang.Class"};

        // If maping fails, sharing is disabled

        if (wb.isSharingEnabled()) {

            for (int i = 0; i < classes.length; i++) {

                Class c = Class.forName(classes[i]);

                if (wb.isSharedClass(c)) {

                    System.out.println(classes[i] + " is shared.");

                } else {

                    throw new RuntimeException(classes[i] + " is not shared");

                }

            }

        } else {

           throw new SkippedException("Sharing is not enabled.");

        }

    }

}