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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
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 * 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
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 *
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 * 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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package gc.whitebox;

/*
 * @test TestWBGC
 * @bug 8055098
 * @summary Test verify that WB methods isObjectInOldGen and youngGC works correctly.
 * @requires vm.gc != "Z" & vm.gc != "Shenandoah"
 * @library /test/lib
 * @modules java.base/jdk.internal.misc
 *          java.management
 * @build sun.hotspot.WhiteBox
 * @run driver ClassFileInstaller sun.hotspot.WhiteBox
 * @run driver gc.whitebox.TestWBGC
 */
import jdk.test.lib.Asserts;
import jdk.test.lib.process.ProcessTools;
import jdk.test.lib.process.OutputAnalyzer;
import sun.hotspot.WhiteBox;

public class TestWBGC {

    public static void main(String args[]) throws Exception {
        ProcessBuilder pb = ProcessTools.createTestJvm(
                "-Xbootclasspath/a:.",
                "-XX:+UnlockDiagnosticVMOptions",
                "-XX:+WhiteBoxAPI",
                "-XX:MaxTenuringThreshold=1",
                "-Xlog:gc",
                GCYoungTest.class.getName());

        OutputAnalyzer output = new OutputAnalyzer(pb.start());
        System.out.println(output.getStdout());
        output.shouldHaveExitValue(0);
        output.shouldContain("WhiteBox Initiated Young GC");
        output.shouldNotContain("Full");
        // To be sure that we don't provoke Full GC additionaly to young
    }

    public static class GCYoungTest {
        static WhiteBox wb = WhiteBox.getWhiteBox();
        public static Object obj;

        public static void main(String args[]) {
            obj = new Object();
            Asserts.assertFalse(wb.isObjectInOldGen(obj));
            wb.youngGC();
            wb.youngGC();
            // 2 young GC is needed to promote object into OldGen
            Asserts.assertTrue(wb.isObjectInOldGen(obj));
        }
    }
}
