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 import static jdk.test.lib.Asserts.assertNE; 30 31 import jdk.jfr.internal.JVM; 32 import jdk.jfr.internal.Type; 33 34 /* 35 * @test TestClassId 36 * @key jfr 37 * @library /test/lib 38 * @modules jdk.jfr/jdk.jfr.internal 39 * @run main/othervm jdk.jfr.jvm.TestClassId 40 */ 41 public class TestClassId { 42 43 public static void main(String... args) { 44 assertClassIds(); 45 JVM jvm = JVM.getJVM(); 46 jvm.createNativeJFR(); 47 assertClassIds(); 48 jvm.destroyNativeJFR(); 49 assertClassIds(); 50 } 51 52 private static void assertClassIds() { 53 long doubleClassId = Type.getTypeId(Double.class); 54 assertGreaterThan(doubleClassId, 0L, "Class id must be greater than 0"); 55 56 long floatClassId = Type.getTypeId(Float.class); 57 assertNE(doubleClassId, floatClassId, "Different classes must have different class ids"); 58 } 59 }