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 }