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  */
  23 
  24 /*
  25  * @test TestConMarkCycleWB
  26  * @bug 8065579
  27  * @requires vm.gc=="null" | vm.gc=="G1"
  28  * @library /testlibrary /testlibrary/whitebox
  29  * @build ClassFileInstaller com.oracle.java.testlibrary.* sun.hotspot.WhiteBox TestConcMarkCycleWB
  30  * @run main ClassFileInstaller sun.hotspot.WhiteBox
  31  *                              sun.hotspot.WhiteBox$WhiteBoxPermission
  32  * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI -XX:+UseG1GC TestConcMarkCycleWB
  33  * @summary Verifies that ConcurrentMarking-related WB works properly
  34  */
  35 import static com.oracle.java.testlibrary.Asserts.assertFalse;
  36 import static com.oracle.java.testlibrary.Asserts.assertTrue;
  37 import sun.hotspot.WhiteBox;
  38 
  39 public class TestConcMarkCycleWB {
  40 
  41     public static void main(String[] args) throws Exception {
  42         WhiteBox wb = WhiteBox.getWhiteBox();
  43 
  44         wb.youngGC();
  45         assertTrue(wb.g1StartConcMarkCycle());
  46         while (wb.g1InConcurrentMark()) {
  47             Thread.sleep(5);
  48         }
  49 
  50         wb.fullGC();
  51         assertTrue(wb.g1StartConcMarkCycle());
  52         while (wb.g1InConcurrentMark()) {
  53             Thread.sleep(5);
  54         }
  55         assertTrue(wb.g1StartConcMarkCycle());
  56     }
  57 }