Fri, 24 Apr 2020 03:58:51 +0100
Merge
1 /*
2 * Copyright (c) 2013, 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. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
26 /*
27 * @test
28 * @bug 8011181
29 * @summary javac, empty UTF8 entry generated for inner class
30 */
32 import java.io.BufferedInputStream;
33 import java.nio.file.Files;
34 import java.nio.file.Path;
35 import java.nio.file.Paths;
37 import com.sun.tools.javac.util.Assert;
38 import com.sun.tools.classfile.ClassFile;
40 import static com.sun.tools.classfile.ConstantPool.CONSTANT_Utf8;
41 import static com.sun.tools.classfile.ConstantPool.CONSTANT_Utf8_info;
42 import static com.sun.tools.classfile.ConstantPool.CPInfo;
44 public class EmptyUTF8ForInnerClassNameTest {
46 public static void main(String[] args) throws Exception {
47 new EmptyUTF8ForInnerClassNameTest().run();
48 }
50 void run() throws Exception {
51 checkClassFile(Paths.get(System.getProperty("test.classes"),
52 this.getClass().getName() + "$1.class"));
53 checkClassFile(Paths.get(System.getProperty("test.classes"),
54 this.getClass().getName() + "$EnumPlusSwitch.class"));
55 }
57 void checkClassFile(final Path path) throws Exception {
58 ClassFile classFile = ClassFile.read(
59 new BufferedInputStream(Files.newInputStream(path)));
60 for (CPInfo cpInfo : classFile.constant_pool.entries()) {
61 if (cpInfo.getTag() == CONSTANT_Utf8) {
62 CONSTANT_Utf8_info utf8Info = (CONSTANT_Utf8_info)cpInfo;
63 Assert.check(utf8Info.value.length() > 0,
64 "UTF8 with length 0 found at class " + classFile.getName());
65 }
66 }
67 }
69 static class EnumPlusSwitch {
70 enum E {E1}
72 public int m (E e) {
73 switch (e) {
74 case E1:
75 return 0;
76 }
77 return -1;
78 }
79 }
81 }