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

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 *

 * 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 image opening/closing

 * @test ImageOpenTest

 * @summary Unit test for JVM_ImageOpen() method

 * @library /testlibrary /../../test/lib

 * @build ImageOpenTest

 * @run main ClassFileInstaller sun.hotspot.WhiteBox

 *                              sun.hotspot.WhiteBox$WhiteBoxPermission

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

 */

import java.io.File;

import java.nio.ByteOrder;

import sun.hotspot.WhiteBox;

import static jdk.test.lib.Asserts.*;

public class ImageOpenTest {

    public static final WhiteBox wb = WhiteBox.getWhiteBox();

    public static void main(String... args) throws Exception {

        String javaHome = System.getProperty("java.home");

        String nonexistentImageFile = javaHome + "/lib/modules/nonexistent.jimage";

        String bootmodulesImageFile = javaHome + File.separator + "lib" + File.separator

                + "modules" + File.separator + "bootmodules.jimage";

        if (!(new File(bootmodulesImageFile)).exists()) {

            System.out.printf("Test skipped.");

            return;

        }

        boolean bigEndian = ByteOrder.nativeOrder() == ByteOrder.BIG_ENDIAN;

        // open nonexistent image

        long id = wb.imageOpenImage(nonexistentImageFile, bigEndian);

        assertTrue(id == 0L, "Failed. Get id " + id + "instead of 0 on opening nonexistent file\n");

        wb.imageCloseImage(id);

        // open bootmodules image

        id = wb.imageOpenImage(bootmodulesImageFile, bigEndian);

        assertFalse(id == 0, "Failed. Get id 0 on opening bootmodules.jimage");

        wb.imageCloseImage(id);

        // non-native endian

        id = wb.imageOpenImage(bootmodulesImageFile, !bigEndian);

        assertFalse(id == 0, "Failed. Get id 0 on opening bootmodules.jimage with non-native endian");

        wb.imageCloseImage(id);

        //

        // open several times

        //

        id = wb.imageOpenImage(bootmodulesImageFile, bigEndian);

        long id1 = wb.imageOpenImage(bootmodulesImageFile, bigEndian);

        long id2 = wb.imageOpenImage(bootmodulesImageFile, bigEndian);

        assertTrue((id == id1) && (id == id2), "Failed. Open thee times with ids " + id + " " + id1 + " " + id1);

        wb.imageCloseImage(id);

        wb.imageCloseImage(id1);

        wb.imageCloseImage(id2);

    }

}