langtools/test/tools/javac/AnonymousClass/AnonymousClassFlags.java
author dlsmith
Thu, 14 Jul 2016 11:57:15 -0600
changeset 39674 de3b0e52ca17
permissions -rw-r--r--
8161013: Never treat anonymous classes as 'final' Reviewed-by: vromero
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/*
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 * Copyright (c) 2016, 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 8161013
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 * @summary Verify that anonymous class binaries have the correct flags set
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 * @modules jdk.jdeps/com.sun.tools.classfile
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 * @run main AnonymousClassFlags
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 */
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import java.util.*;
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import java.nio.file.Path;
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import java.nio.file.Paths;
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import com.sun.tools.classfile.*;
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import static com.sun.tools.classfile.AccessFlags.*;
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public class AnonymousClassFlags {
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    public static void main(String[] args) throws Exception {
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        new AnonymousClassFlags().test(System.getProperty("test.classes", "."));
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    }
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    /** Maps names of anonymous classes to their expected inner_class_access_flags */
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    private static Map<String, Integer> anonClasses = new LinkedHashMap<>();
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    // ******* TEST CASES ********
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    static Object o1 = new Object() {
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        { anonClasses.put(getClass().getName(), 0); }
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    };
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    static void staticMethod() {
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        Object o2 = new Object() {
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            { anonClasses.put(getClass().getName(), 0); }
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        };
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    }
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    static {
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        staticMethod();
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        Object o3 = new Object() {
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            { anonClasses.put(getClass().getName(), 0); }
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        };
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    }
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    Object o4 = new Object() {
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        { anonClasses.put(getClass().getName(), 0); }
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    };
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    void instanceMethod() {
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        Object o5 = new Object() {
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            { anonClasses.put(getClass().getName(), 0); }
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        };
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    }
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    {
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        instanceMethod();
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        Object o6 = new Object() {
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            { anonClasses.put(getClass().getName(), 0); }
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        };
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    }
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    // ******* TEST IMPLEMENTATION ********
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    void test(String classesDir) throws Exception {
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        staticMethod();
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        instanceMethod();
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        Path outerFile = Paths.get(classesDir, getClass().getName() + ".class");
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        ClassFile outerClass = ClassFile.read(outerFile);
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        for (Map.Entry<String,Integer> entry : anonClasses.entrySet()) {
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            Path innerFile = Paths.get(classesDir, entry.getKey() + ".class");
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            ClassFile innerClass = ClassFile.read(innerFile);
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            String name = entry.getKey();
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            int expected = entry.getValue();
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            assertInnerFlags(outerClass, name, expected);
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            assertClassFlags(innerClass, name, expected);
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            assertInnerFlags(innerClass, name, expected);
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        }
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    }
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    static void assertClassFlags(ClassFile classFile, String name, int expected) {
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        int mask = ACC_PUBLIC | ACC_FINAL | ACC_INTERFACE | ACC_ABSTRACT |
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                   ACC_SYNTHETIC | ACC_ANNOTATION | ACC_ENUM;
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        int classExpected = (expected & mask) | ACC_SUPER;
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        int classActual = classFile.access_flags.flags;
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        if (classActual != classExpected) {
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            throw new AssertionError("Incorrect access_flags for class " + name +
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                                     ": expected=" + classExpected + ", actual=" + classActual);
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        }
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    }
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    static void assertInnerFlags(ClassFile classFile, String name, int expected) throws ConstantPoolException {
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        int innerActual = lookupInnerFlags(classFile, name).flags;
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        if (innerActual != expected) {
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            throw new AssertionError("Incorrect inner_class_access_flags for class " + name +
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                                     " in class " + classFile.getName() +
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                                     ": expected=" + expected + ", actual=" + innerActual);
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        }
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    }
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    private static AccessFlags lookupInnerFlags(ClassFile classFile, String innerName) throws ConstantPoolException {
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        InnerClasses_attribute inners = (InnerClasses_attribute) classFile.getAttribute("InnerClasses");
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        if (inners == null) {
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            throw new AssertionError("InnerClasses attribute missing in class " + classFile.getName());
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        }
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        for (InnerClasses_attribute.Info info : inners.classes) {
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            String entryName = info.getInnerClassInfo(classFile.constant_pool).getName();
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            if (innerName.equals(entryName)) {
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                return info.inner_class_access_flags;
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            }
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        }
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        throw new AssertionError("No InnerClasses entry in class " + classFile.getName() + " for class " + innerName);
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    }
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}