1 /* 2 * Copyright (c) 2020, 2024, 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 import jdk.internal.vm.annotation.ImplicitlyConstructible; 26 import jdk.internal.vm.annotation.LooselyConsistentValue; 27 import jdk.test.lib.Asserts; 28 29 30 /* 31 * @test 32 * @summary Test JNI IsSameObject semantic with inline types 33 * @library /testlibrary /test/lib 34 * @modules java.base/jdk.internal.vm.annotation 35 * @requires (os.simpleArch == "x64" | os.simpleArch == "aarch64") 36 * @requires (os.family == "linux" | os.family == "mac") 37 * @enablePreview 38 * @compile TestJNIIsSameObject.java 39 * @run main/othervm/native TestJNIIsSameObject 40 */ 41 42 public class TestJNIIsSameObject { 43 @ImplicitlyConstructible 44 @LooselyConsistentValue 45 static value class Value { 46 int i; 47 48 public Value(int i) { 49 this.i = i; 50 } 51 } 52 native static boolean isSameObject(Object o0, Object o1); 53 54 static { 55 System.loadLibrary("JNIIsSameObject"); 56 } 57 58 public static void main(String[] args) { 59 // Same value in different instances 60 Value v0 = new Value(3); 61 Value v1 = new Value(3); 62 Asserts.assertTrue(isSameObject(v0, v1)); 63 64 // Different values 65 Value v2 = new Value(4); 66 Asserts.assertFalse(isSameObject(v0, v2)); 67 68 // Same object 69 TestJNIIsSameObject t0 = new TestJNIIsSameObject(); 70 Object o = t0; 71 Asserts.assertTrue(isSameObject(t0, o)); 72 73 // Different objects 74 TestJNIIsSameObject t1 = new TestJNIIsSameObject(); 75 Asserts.assertFalse(isSameObject(t0, t1)); 76 77 // Comparing against null 78 Asserts.assertFalse(isSameObject(v0, null)); 79 Asserts.assertFalse(isSameObject(null, v0)); 80 Asserts.assertFalse(isSameObject(t0, null)); 81 Asserts.assertFalse(isSameObject(null, t0)); 82 83 // Object vs inline 84 Asserts.assertFalse(isSameObject(v0, t0)); 85 Asserts.assertFalse(isSameObject(t0, v0)); 86 87 } 88 }