1 /* 2 * Copyright (c) 2020, 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 * @test 26 * @requires vm.jvmci 27 * @library ../../../../../ 28 * @modules java.base/jdk.internal.reflect 29 * jdk.internal.vm.ci/jdk.vm.ci.meta 30 * jdk.internal.vm.ci/jdk.vm.ci.runtime 31 * jdk.internal.vm.ci/jdk.vm.ci.common 32 * java.base/jdk.internal.misc 33 * @run junit/othervm -XX:+UnlockExperimentalVMOptions -XX:+EnableJVMCI -XX:-UseJVMCICompiler jdk.vm.ci.runtime.test.TestSingleImplementor 34 */ 35 36 package jdk.vm.ci.runtime.test; 37 38 import org.junit.Assert; 39 import org.junit.Test; 40 41 import jdk.vm.ci.meta.ResolvedJavaType; 42 43 44 public class TestSingleImplementor extends TypeUniverse { 45 46 static int SideEffect; 47 48 interface I { 49 void foo(); 50 } 51 52 interface I1 extends I { 53 } 54 55 interface I2 extends I { 56 } 57 58 static class Impl implements I1, I2 { 59 @Override 60 public void foo() { 61 SideEffect = 42; 62 } 63 } 64 65 public static void snippetDiamond(I i) { 66 i.foo(); 67 } 68 69 @Test 70 public void testDiamondShape() throws Throwable { 71 snippetDiamond(new Impl()); 72 ResolvedJavaType interfaceType = metaAccess.lookupJavaType(I.class); 73 ResolvedJavaType implementationType = metaAccess.lookupJavaType(Impl.class); 74 Assert.assertEquals(implementationType, interfaceType.getSingleImplementor()); 75 } 76 77 interface IF1 { 78 void foo(); 79 } 80 81 static class Impl1 implements IF1 { 82 @Override 83 public void foo() { 84 SideEffect = 43; 85 } 86 } 87 88 public static void snippetRegular(IF1 i) { 89 i.foo(); 90 } 91 92 @Test 93 public void testRegularShape() throws Throwable { 94 snippetRegular(new Impl1()); 95 ResolvedJavaType interfaceType = metaAccess.lookupJavaType(IF1.class); 96 ResolvedJavaType implementationType = metaAccess.lookupJavaType(Impl1.class); 97 Assert.assertEquals(implementationType, interfaceType.getSingleImplementor()); 98 } 99 100 }