jdk

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/*
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 * Copyright (c) 2014, 2023, Oracle and/or its affiliates. All rights reserved.
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 *
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 * This code is free software; you can redistribute it and/or modify it
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 * under the terms of the GNU General Public License version 2 only, as
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 * published by the Free Software Foundation.
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 *
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 * This code is distributed in the hope that it will be useful, but WITHOUT
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 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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 * version 2 for more details (a copy is included in the LICENSE file that
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 * accompanied this code).
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 *
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 * You should have received a copy of the GNU General Public License version
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 * 2 along with this work; if not, write to the Free Software Foundation,
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 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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 *
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 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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 * or visit www.oracle.com if you need additional information or have any
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 * questions.
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 */
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import java.io.File;
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import java.io.FileOutputStream;
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import jdk.internal.org.objectweb.asm.ClassWriter;
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import jdk.internal.org.objectweb.asm.MethodVisitor;
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import static jdk.internal.org.objectweb.asm.Opcodes.*;
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import jdk.test.lib.process.ProcessTools;
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import jdk.test.lib.process.OutputAnalyzer;
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/*
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 * @test OverriderMsg
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 * @bug 8026894
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 * @library /test/lib
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 * @modules java.base/jdk.internal.org.objectweb.asm
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 *          java.base/jdk.internal.misc
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 *          java.management
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 * @compile -XDignore.symbol.file OverriderMsg.java
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 * @run driver OverriderMsg
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 */
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// This test checks that the super class name is included in the message when
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// a method is detected overriding a final method in its super class.  The
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// asm part of the test creates these two classes:
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//
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//     public class HasFinal {
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//         public final void m(String s) { }
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//     }
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//
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//     public class Overrider extends HasFinal {
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//         public void m(String s) { }
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//         public static void main(String[] args) { }
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//     }
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//
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public class OverriderMsg {
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    public static void dump_HasFinal () throws Exception {
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        ClassWriter cw = new ClassWriter(0);
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        MethodVisitor mv;
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        cw.visit(V1_7, ACC_PUBLIC + ACC_SUPER, "HasFinal", null, "java/lang/Object", null);
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        {
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            mv = cw.visitMethod(ACC_PUBLIC, "<init>", "()V", null, null);
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            mv.visitCode();
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            mv.visitVarInsn(ALOAD, 0);
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            mv.visitMethodInsn(INVOKESPECIAL, "java/lang/Object", "<init>", "()V");
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            mv.visitInsn(RETURN);
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            mv.visitMaxs(1, 1);
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            mv.visitEnd();
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        }
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        {
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            mv = cw.visitMethod(ACC_PUBLIC + ACC_FINAL, "m", "(Ljava/lang/String;)V", null, null);
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            mv.visitCode();
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            mv.visitInsn(RETURN);
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            mv.visitMaxs(0, 2);
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            mv.visitEnd();
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        }
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        cw.visitEnd();
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        try (FileOutputStream fos = new FileOutputStream(new File("HasFinal.class"))) {
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             fos.write(cw.toByteArray());
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        }
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    }
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    public static void dump_Overrider () throws Exception {
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        ClassWriter cw = new ClassWriter(0);
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        MethodVisitor mv;
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        cw.visit(V1_7, ACC_PUBLIC + ACC_SUPER, "Overrider", null, "HasFinal", null);
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        {
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            mv = cw.visitMethod(ACC_PUBLIC, "<init>", "()V", null, null);
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            mv.visitCode();
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            mv.visitVarInsn(ALOAD, 0);
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            mv.visitMethodInsn(INVOKESPECIAL, "HasFinal", "<init>", "()V");
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            mv.visitInsn(RETURN);
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            mv.visitMaxs(1, 1);
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            mv.visitEnd();
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        }
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        {
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            mv = cw.visitMethod(ACC_PUBLIC, "m", "(Ljava/lang/String;)V", null, null);
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            mv.visitCode();
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            mv.visitInsn(RETURN);
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            mv.visitMaxs(0, 2);
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            mv.visitEnd();
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        }
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        {
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            mv = cw.visitMethod(ACC_PUBLIC + ACC_STATIC, "main", "([Ljava/lang/String;)V", null, null);
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            mv.visitCode();
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            mv.visitInsn(RETURN);
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            mv.visitMaxs(0, 1);
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            mv.visitEnd();
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        }
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        cw.visitEnd();
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        try (FileOutputStream fos = new FileOutputStream(new File("Overrider.class"))) {
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             fos.write(cw.toByteArray());
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        }
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    }
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    public static void main(String... args) throws Exception {
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        dump_HasFinal();
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        dump_Overrider();
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        ProcessBuilder pb = ProcessTools.createTestJavaProcessBuilder("-cp", ".",  "Overrider");
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        OutputAnalyzer output = new OutputAnalyzer(pb.start());
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        output.shouldContain(
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            "java.lang.IncompatibleClassChangeError: class Overrider overrides final method HasFinal.m(Ljava/lang/String;)V");
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        output.shouldHaveExitValue(1);
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    }
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}
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