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 }