1 /* 2 * Copyright (c) 2018, 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. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 26 package jdk.jfr.jvm; 27 28 import static jdk.test.lib.Asserts.assertGreaterThan; 29 30 import jdk.jfr.internal.JVM; 31 32 /** 33 * @test TestCounterTime 34 * @key jfr 35 * @requires vm.hasJFR 36 * @library /test/lib 37 * @modules jdk.jfr/jdk.jfr.internal 38 * @run main/othervm jdk.jfr.jvm.TestCounterTime 39 */ 40 public class TestCounterTime { 41 42 public static void main(String... args) throws InterruptedException { 43 // Not enabled 44 assertCounterTime(); 45 46 JVM jvm = JVM.getJVM(); 47 jvm.createNativeJFR(); 48 assertCounterTime(); 49 // Enabled 50 jvm.destroyNativeJFR(); 51 } 52 53 private static void assertCounterTime() throws InterruptedException { 54 long time1 = JVM.counterTime(); 55 assertGreaterThan(time1, 0L, "Counter time can't be negative."); 56 57 Thread.sleep(1); 58 59 long time2 = JVM.counterTime(); 60 assertGreaterThan(time2, time1, "Counter time must be increasing."); 61 } 62 }