/*

 * Copyright (c) 2014, 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.

 *

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 */

/*

 * @test TestWBGC

 * @bug 8055098

 * @summary Test verify that WB methods isObjectInOldGen and youngGC works correctly.

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

 * @build TestWBGC

 * @run main ClassFileInstaller sun.hotspot.WhiteBox

 * @run driver TestWBGC

 */

import com.oracle.java.testlibrary.*;

import sun.hotspot.WhiteBox;

public class TestWBGC {

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

        ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(

                true,

                "-Xbootclasspath/a:.",

                "-XX:+UnlockDiagnosticVMOptions",

                "-XX:+WhiteBoxAPI",

                "-XX:MaxTenuringThreshold=1",

                "-XX:+PrintGC",

                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));

        }

    }

}