1 /*
   2  * Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved.
   3  * Copyright 2016 Azul Systems, Inc.  All Rights Reserved.
   4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   5  *
   6  * This code is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU General Public License version 2 only, as
   8  * published by the Free Software Foundation.
   9  *
  10  * This code is distributed in the hope that it will be useful, but WITHOUT
  11  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  12  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  13  * version 2 for more details (a copy is included in the LICENSE file that
  14  * accompanied this code).
  15  *
  16  * You should have received a copy of the GNU General Public License version
  17  * 2 along with this work; if not, write to the Free Software Foundation,
  18  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  19  *
  20  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  21  * or visit www.oracle.com if you need additional information or have any
  22  * questions.
  23  */
  24 
  25 /**
  26  * @test TestOnSpinWaitEnableDisable
  27  * @summary Test to ensure basic functioning of java.lang.Thread.onSpinWait
  28  * @bug 8157683
  29  * @run main TestOnSpinWaitEnableDisable
  30  * @run main/othervm -XX:+UnlockDiagnosticVMOptions -XX:DisableIntrinsic=_onSpinWait TestOnSpinWaitEnableDisable
  31  */
  32 
  33 public class TestOnSpinWaitEnableDisable {
  34     public static void main(String[] args) {
  35         for (int i = 0; i < 50_000; i++) {
  36             java.lang.Thread.onSpinWait();
  37         }
  38     }
  39 }