1/*
2 * Copyright (c) 2014, 2016, 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.
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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22 */
23
24/*
25 * @test TestWBGC
26 * @bug 8055098
27 * @summary Test verify that WB methods isObjectInOldGen and youngGC works correctly.
28 * @library /test/lib
29 * @modules java.base/jdk.internal.misc
30 *          java.management
31 * @build sun.hotspot.WhiteBox
32 * @run main ClassFileInstaller sun.hotspot.WhiteBox
33 * @run driver TestWBGC
34 */
35import jdk.test.lib.Asserts;
36import jdk.test.lib.process.ProcessTools;
37import jdk.test.lib.process.OutputAnalyzer;
38import sun.hotspot.WhiteBox;
39
40public class TestWBGC {
41
42    public static void main(String args[]) throws Exception {
43        ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(
44                true,
45                "-Xbootclasspath/a:.",
46                "-XX:+UnlockDiagnosticVMOptions",
47                "-XX:+WhiteBoxAPI",
48                "-XX:MaxTenuringThreshold=1",
49                "-Xlog:gc",
50                GCYoungTest.class.getName());
51
52        OutputAnalyzer output = new OutputAnalyzer(pb.start());
53        System.out.println(output.getStdout());
54        output.shouldHaveExitValue(0);
55        output.shouldContain("WhiteBox Initiated Young GC");
56        output.shouldNotContain("Full");
57        // To be sure that we don't provoke Full GC additionaly to young
58    }
59
60    public static class GCYoungTest {
61        static WhiteBox wb = WhiteBox.getWhiteBox();
62        public static Object obj;
63
64        public static void main(String args[]) {
65            obj = new Object();
66            Asserts.assertFalse(wb.isObjectInOldGen(obj));
67            wb.youngGC();
68            wb.youngGC();
69            // 2 young GC is needed to promote object into OldGen
70            Asserts.assertTrue(wb.isObjectInOldGen(obj));
71        }
72    }
73}
74