1 /*
   2  * Copyright (c) 2017, 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
  26  * @bug 8184271
  27  * @summary Test correct scheduling of System.nanoTime and System.currentTimeMillis C1 intrinsics.
  28  * @run main/othervm -XX:TieredStopAtLevel=1 -Xbatch
  29  *                   -XX:CompileCommand=dontinline,compiler.c1.TestPinnedIntrinsics::checkNanoTime
  30  *                   -XX:CompileCommand=dontinline,compiler.c1.TestPinnedIntrinsics::checkCurrentTimeMillis
  31  *                   compiler.c1.TestPinnedIntrinsics
  32  */
  33 
  34 package compiler.c1;
  35 
  36 public class TestPinnedIntrinsics {
  37     
  38     private static void testNanoTime() {
  39         long start = System.nanoTime(); 
  40         long end = System.nanoTime(); 
  41         checkNanoTime(end - start);
  42     }
  43 
  44     private static void checkNanoTime(long diff) { 
  45         if (diff < 0) { 
  46             throw new RuntimeException("testNanoTime failed with " + diff);
  47         } 
  48     }
  49 
  50     private static void testCurrentTimeMillis() {
  51         long start = System.currentTimeMillis(); 
  52         long end = System.currentTimeMillis(); 
  53         checkCurrentTimeMillis(end - start);
  54     }
  55 
  56     private static void checkCurrentTimeMillis(long diff) { 
  57         if (diff < 0) { 
  58             throw new RuntimeException("testCurrentTimeMillis failed with " + diff);
  59         } 
  60     } 
  61 
  62     public static void main(String[] args) {
  63         for (int i = 0; i < 100_000; ++i) {
  64             testNanoTime();
  65             testCurrentTimeMillis();
  66         }
  67     }
  68 }