/*

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

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 * under the terms of the GNU General Public License version 2 only, as

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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 TestConMarkCycleWB

 * @bug 8065579

 * @requires vm.gc=="null" | vm.gc=="G1"

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

 * @build ClassFileInstaller com.oracle.java.testlibrary.* sun.hotspot.WhiteBox TestConcMarkCycleWB

 * @run main ClassFileInstaller sun.hotspot.WhiteBox

 *                              sun.hotspot.WhiteBox$WhiteBoxPermission

 * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI -XX:+UseG1GC TestConcMarkCycleWB

 * @summary Verifies that ConcurrentMarking-related WB works properly

 */

import static com.oracle.java.testlibrary.Asserts.assertFalse;

import static com.oracle.java.testlibrary.Asserts.assertTrue;

import sun.hotspot.WhiteBox;

public class TestConcMarkCycleWB {

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

        WhiteBox wb = WhiteBox.getWhiteBox();

        wb.youngGC();

        assertTrue(wb.g1StartConcMarkCycle());

        while (wb.g1InConcurrentMark()) {

            Thread.sleep(5);

        }

        wb.fullGC();

        assertTrue(wb.g1StartConcMarkCycle());

        while (wb.g1InConcurrentMark()) {

            Thread.sleep(5);

        }

        assertTrue(wb.g1StartConcMarkCycle());

    }

}