--- /dev/null 2018-06-17 23:18:20.806999507 +0800 +++ new/test/jdk/jfr/jvm/TestCounterTime.java 2019-01-29 11:05:28.710369146 +0800 @@ -0,0 +1,61 @@ +/* + * Copyright (c) 2018, 2019, Oracle and/or its affiliates. All rights reserved. + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. + * + * This code is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 only, as + * published by the Free Software Foundation. Oracle designates this + * particular file as subject to the "Classpath" exception as provided + * by Oracle in the LICENSE file that accompanied this code. + * + * This code is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License + * version 2 for more details (a copy is included in the LICENSE file that + * accompanied this code). + * + * You should have received a copy of the GNU General Public License version + * 2 along with this work; if not, write to the Free Software Foundation, + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. + * + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA + * or visit www.oracle.com if you need additional information or have any + * questions. + */ + +package jdk.jfr.jvm; + +import static jdk.testlibrary.Asserts.assertGreaterThan; + +import jdk.jfr.internal.JVM; + +/* + * @test TestCounterTime + * @key jfr + * @library /lib/testlibrary + * @modules jdk.jfr/jdk.jfr.internal + * @run main/othervm jdk.jfr.jvm.TestCounterTime + */ +public class TestCounterTime { + + public static void main(String... args) throws InterruptedException { + // Not enabled + assertCounterTime(); + + JVM jvm = JVM.getJVM(); + jvm.createNativeJFR(); + assertCounterTime(); + // Enabled + jvm.destroyNativeJFR(); + } + + private static void assertCounterTime() throws InterruptedException { + long time1 = JVM.counterTime(); + assertGreaterThan(time1, 0L, "Counter time can't be negative."); + + Thread.sleep(1); + + long time2 = JVM.counterTime(); + assertGreaterThan(time2, time1, "Counter time must be increasing."); + } +}