test/langtools/tools/javac/7199823/InnerClassCannotBeVerified.java
author dholmes
Sat, 23 Jun 2018 01:32:41 -0400
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8010319: Implementation of JEP 181: Nest-Based Access Control Reviewed-by: alanb, psandoz, mchung, coleenp, acorn, mcimadamore, forax, jlahoda, sspitsyn, abuckley Contributed-by: alex.buckley@oracle.com, maurizio.mimadamore@oracle.com, mandy.chung@oracle.com, tobias.hartmann@oracle.com, david.holmes@oracle.com, vladimir.x.ivanov@oracle.com, karen.kinnear@oracle.com, vladimir.kozlov@oracle.com, john.r.rose@oracle.com, daniel.smith@oracle.com, serguei.spitsyn@oracle.com, kumardotsrinivasan@gmail.com, boris.ulasevich@bell-sw.com
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/*
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 * Copyright (c) 2012, 2018, 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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/*
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 * @test
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 * @bug 7199823
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 * @summary javac generates inner class that can't be verified
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 * @modules jdk.jdeps/com.sun.tools.classfile
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 * @run main InnerClassCannotBeVerified
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 */
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import java.nio.file.NoSuchFileException;
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import java.util.Arrays;
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import javax.tools.JavaFileObject;
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import java.net.URI;
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import javax.tools.SimpleJavaFileObject;
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import javax.tools.ToolProvider;
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import javax.tools.JavaCompiler;
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import com.sun.source.util.JavacTask;
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import com.sun.tools.classfile.ClassFile;
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import com.sun.tools.classfile.ConstantPoolException;
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import java.io.File;
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import java.io.IOException;
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public class InnerClassCannotBeVerified {
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    enum CompilationKind {
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        PRE_NESTMATES("-source", "10", "-target", "10"),
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        POST_NESTMATES();
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        String[] opts;
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        CompilationKind(String... opts) {
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            this.opts = opts;
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        }
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    }
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    private static final String errorMessage =
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            "Compile error while compiling the following source:\n";
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    public static void main(String... args) throws Exception {
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        new InnerClassCannotBeVerified().run();
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    }
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    void run() throws Exception {
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        for (CompilationKind ck : CompilationKind.values()) {
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            File file = new File("Test$1.class");
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            if (file.exists()) {
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                file.delete();
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            }
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            JavaCompiler comp = ToolProvider.getSystemJavaCompiler();
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            JavaSource source = new JavaSource();
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            JavacTask ct = (JavacTask)comp.getTask(null, null, null,
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                    Arrays.asList(ck.opts), null, Arrays.asList(source));
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            try {
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                if (!ct.call()) {
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                    throw new AssertionError(errorMessage +
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                            source.getCharContent(true));
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                }
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            } catch (Throwable ex) {
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                throw new AssertionError(errorMessage +
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                        source.getCharContent(true));
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            }
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            check(ck);
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        }
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    }
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    private void check(CompilationKind ck) throws IOException, ConstantPoolException {
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        try {
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            File file = new File("Test$1.class");
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            ClassFile classFile = ClassFile.read(file);
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            if (ck == CompilationKind.POST_NESTMATES) {
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                throw new AssertionError("Unexpected constructor tag class!");
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            }
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            boolean inheritsFromObject =
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                    classFile.getSuperclassName().equals("java/lang/Object");
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            boolean implementsNoInterface = classFile.interfaces.length == 0;
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            boolean noMethods = classFile.methods.length == 0;
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            if (!(inheritsFromObject &&
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                    implementsNoInterface &&
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                    noMethods)) {
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                throw new AssertionError("The inner classes reused as " +
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                        "access constructor tag for this code must be empty");
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            }
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        } catch (NoSuchFileException ex) {
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            if (ck == CompilationKind.PRE_NESTMATES) {
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                throw new AssertionError("Constructor tag class missing!");
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            }
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        }
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    }
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    class JavaSource extends SimpleJavaFileObject {
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        String internalSource =
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                              "public class Test {\n" +
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                              "    private static class Foo {}\n" +
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                              "    public static void main(String[] args){ \n" +
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                              "        new Foo();\n" +
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                              "        if(false) {\n" +
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                              "            new Runnable() {\n" +
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                              "                @Override\n" +
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                              "                public void run() {\n" +
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                              "                    System.out.println();\n" +
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                              "                }\n" +
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                              "            }.run();\n" +
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                              "        }\n" +
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                              "   }\n" +
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                              "}";
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        public JavaSource() {
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            super(URI.create("Test.java"), JavaFileObject.Kind.SOURCE);
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        }
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        @Override
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        public CharSequence getCharContent(boolean ignoreEncodingErrors) {
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            return internalSource;
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        }
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    }
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}