jdk8-mips64-public/hotspot: test/gc/whitebox/TestWBGC.java@6cbff0651f1a

     1 /*

     2  * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.

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

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

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

     7  * published by the Free Software Foundation.

     8  *

     9  * This code is distributed in the hope that it will be useful, but WITHOUT

    10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    12  * version 2 for more details (a copy is included in the LICENSE file that

    13  * accompanied this code).

    14  *

    15  * You should have received a copy of the GNU General Public License version

    16  * 2 along with this work; if not, write to the Free Software Foundation,

    17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    18  *

    19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    20  * or visit www.oracle.com if you need additional information or have any

    21  * questions.

    22  */

    24 /*

    25  * @test TestWBGC

    26  * @bug 8055098

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

    28  * @library /testlibrary /testlibrary/whitebox

    29  * @build TestWBGC

    30  * @run main ClassFileInstaller sun.hotspot.WhiteBox

    31  * @run driver TestWBGC

    32  */

    33 import com.oracle.java.testlibrary.*;

    34 import sun.hotspot.WhiteBox;

    36 public class TestWBGC {

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

    39         ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(

    40                 true,

    41                 "-Xbootclasspath/a:.",

    42                 "-XX:+UnlockDiagnosticVMOptions",

    43                 "-XX:+WhiteBoxAPI",

    44                 "-XX:MaxTenuringThreshold=1",

    45                 "-XX:+PrintGC",

    46                 GCYoungTest.class.getName());

    48         OutputAnalyzer output = new OutputAnalyzer(pb.start());

    49         System.out.println(output.getStdout());

    50         output.shouldHaveExitValue(0);

    51         output.shouldContain("WhiteBox Initiated Young GC");

    52         output.shouldNotContain("Full");

    53         // To be sure that we don't provoke Full GC additionaly to young

    54     }

    56     public static class GCYoungTest {

    57         static WhiteBox wb = WhiteBox.getWhiteBox();

    58         public static Object obj;

    60         public static void main(String args[]) {

    61             obj = new Object();

    62             Asserts.assertFalse(wb.isObjectInOldGen(obj));

    63             wb.youngGC();

    64             wb.youngGC();

    65             // 2 young GC is needed to promote object into OldGen

    66             Asserts.assertTrue(wb.isObjectInOldGen(obj));

    67         }

    68     }

    69 }

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