8011181: javac, empty UTF8 entry generated for inner class

Wed, 17 Apr 2013 11:11:33 +0100

author
vromero
date
Wed, 17 Apr 2013 11:11:33 +0100
changeset 1698
49d32c84dfea
parent 1697
950e8ac120f0
child 1699
94870c08391c

8011181: javac, empty UTF8 entry generated for inner class
Reviewed-by: jjg

src/share/classes/com/sun/tools/javac/jvm/ClassWriter.java file | annotate | diff | comparison | revisions
test/tools/javac/T8011181/EmptyUTF8ForInnerClassNameTest.java file | annotate | diff | comparison | revisions
     1.1 --- a/src/share/classes/com/sun/tools/javac/jvm/ClassWriter.java	Mon Apr 15 14:18:30 2013 +0100
     1.2 +++ b/src/share/classes/com/sun/tools/javac/jvm/ClassWriter.java	Wed Apr 17 11:11:33 2013 +0100
     1.3 @@ -1016,7 +1016,8 @@
     1.4  //          log.errWriter.println("enter inner " + c);//DEBUG
     1.5              enterInner(c.owner.enclClass());
     1.6              pool.put(c);
     1.7 -            pool.put(c.name);
     1.8 +            if (c.name != names.empty)
     1.9 +                pool.put(c.name);
    1.10              if (innerClasses == null) {
    1.11                  innerClasses = new HashSet<ClassSymbol>();
    1.12                  innerClassesQueue = new ListBuffer<ClassSymbol>();
     2.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     2.2 +++ b/test/tools/javac/T8011181/EmptyUTF8ForInnerClassNameTest.java	Wed Apr 17 11:11:33 2013 +0100
     2.3 @@ -0,0 +1,81 @@
     2.4 +/*
     2.5 + * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved.
     2.6 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
     2.7 + *
     2.8 + * This code is free software; you can redistribute it and/or modify it
     2.9 + * under the terms of the GNU General Public License version 2 only, as
    2.10 + * published by the Free Software Foundation.  Oracle designates this
    2.11 + * particular file as subject to the "Classpath" exception as provided
    2.12 + * by Oracle in the LICENSE file that accompanied this code.
    2.13 + *
    2.14 + * This code is distributed in the hope that it will be useful, but WITHOUT
    2.15 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
    2.16 + * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
    2.17 + * version 2 for more details (a copy is included in the LICENSE file that
    2.18 + * accompanied this code).
    2.19 + *
    2.20 + * You should have received a copy of the GNU General Public License version
    2.21 + * 2 along with this work; if not, write to the Free Software Foundation,
    2.22 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
    2.23 + *
    2.24 + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
    2.25 + * or visit www.oracle.com if you need additional information or have any
    2.26 + * questions.
    2.27 + */
    2.28 +
    2.29 +/*
    2.30 + * @test
    2.31 + * @bug 8011181
    2.32 + * @summary javac, empty UTF8 entry generated for inner class
    2.33 + */
    2.34 +
    2.35 +import java.io.BufferedInputStream;
    2.36 +import java.nio.file.Files;
    2.37 +import java.nio.file.Path;
    2.38 +import java.nio.file.Paths;
    2.39 +
    2.40 +import com.sun.tools.javac.util.Assert;
    2.41 +import com.sun.tools.classfile.ClassFile;
    2.42 +
    2.43 +import static com.sun.tools.classfile.ConstantPool.CONSTANT_Utf8;
    2.44 +import static com.sun.tools.classfile.ConstantPool.CONSTANT_Utf8_info;
    2.45 +import static com.sun.tools.classfile.ConstantPool.CPInfo;
    2.46 +
    2.47 +public class EmptyUTF8ForInnerClassNameTest {
    2.48 +
    2.49 +    public static void main(String[] args) throws Exception {
    2.50 +        new EmptyUTF8ForInnerClassNameTest().run();
    2.51 +    }
    2.52 +
    2.53 +    void run() throws Exception {
    2.54 +        checkClassFile(Paths.get(System.getProperty("test.classes"),
    2.55 +                this.getClass().getName() + "$1.class"));
    2.56 +        checkClassFile(Paths.get(System.getProperty("test.classes"),
    2.57 +                this.getClass().getName() + "$EnumPlusSwitch.class"));
    2.58 +    }
    2.59 +
    2.60 +    void checkClassFile(final Path path) throws Exception {
    2.61 +        ClassFile classFile = ClassFile.read(
    2.62 +                new BufferedInputStream(Files.newInputStream(path)));
    2.63 +        for (CPInfo cpInfo : classFile.constant_pool.entries()) {
    2.64 +            if (cpInfo.getTag() == CONSTANT_Utf8) {
    2.65 +                CONSTANT_Utf8_info utf8Info = (CONSTANT_Utf8_info)cpInfo;
    2.66 +                Assert.check(utf8Info.value.length() > 0,
    2.67 +                        "UTF8 with length 0 found at class " + classFile.getName());
    2.68 +            }
    2.69 +        }
    2.70 +    }
    2.71 +
    2.72 +    static class EnumPlusSwitch {
    2.73 +        enum E {E1}
    2.74 +
    2.75 +        public int m (E e) {
    2.76 +            switch (e) {
    2.77 +                case E1:
    2.78 +                    return 0;
    2.79 +            }
    2.80 +            return -1;
    2.81 +        }
    2.82 +    }
    2.83 +
    2.84 +}

mercurial