1 /*
 2  * Copyright (c) 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  * @test
26  * @modules jdk.incubator.code
27  * @run junit TestInvokeSuper
28  */
29 
30 import jdk.incubator.code.Reflect;
31 import jdk.incubator.code.Op;
32 import jdk.incubator.code.CodeTransformer;
33 import jdk.incubator.code.bytecode.BytecodeGenerator;
34 import jdk.incubator.code.dialect.core.CoreOp;
35 import org.junit.jupiter.api.Assertions;
36 import org.junit.jupiter.api.Disabled;
37 import org.junit.jupiter.api.Test;
38 
39 import java.lang.invoke.MethodHandle;
40 import java.lang.invoke.MethodHandles;
41 import java.lang.reflect.Method;
42 import java.util.Optional;
43 import java.util.stream.Stream;
44 
45 public class TestInvokeSuper {
46 
47     interface I {
48         default String f() { return "I"; }
49     }
50     static class A {
51         String f() { return "A"; }
52     }
53 
54     static class B extends A implements I {
55         final boolean invokeClass;
56 
57         public B(boolean invokeClass) {
58             this.invokeClass = invokeClass;
59         }
60 
61         @Reflect
62         public String f() {
63             return invokeClass ? super.f() : I.super.f();
64         }
65     }
66 
67     @Disabled
68     @Test
69     public void testInvokeSuper() throws Throwable {
70         CoreOp.FuncOp f = getFuncOp(B.class, "f");
71         MethodHandle mh = generate(f);
72 
73         for (boolean invokeClass : new boolean[] {true, false}) {
74             B b = new B(invokeClass);
75             Assertions.assertEquals(b.f(), mh.invoke(b));
76         }
77     }
78 
79     static MethodHandle generate(CoreOp.FuncOp f) {
80         System.out.println(f.toText());
81 
82         return BytecodeGenerator.generate(MethodHandles.lookup().in(B.class), f);
83     }
84 
85     static CoreOp.FuncOp getFuncOp(Class<?> c, String name) {
86         Optional<Method> om = Stream.of(c.getDeclaredMethods())
87                 .filter(m -> m.getName().equals(name))
88                 .findFirst();
89 
90         Method m = om.get();
91         return Op.ofMethod(m).get();
92     }
93 }