T6271787.java revision 2942:08092deced3f 
1/*
2 * Copyright (c) 2008, 2015, 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.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 */
23
24/*
25 * @test
26 * @bug 6271787
27 * @summary javap dumps LocalVariableTypeTable attribute in hex, needs to print a table
28 * @modules jdk.jdeps
29 */
30
31import java.io.*;
32
33public class T6271787 {
34    public static void main(String[] args) throws Exception {
35        new T6271787().run();
36    }
37
38    public void run() throws IOException {
39        File javaFile = writeTestFile();
40        File classFile = compileTestFile(javaFile);
41
42        verify(classFile,
43               "LocalVariableTypeTable:",
44               "0       5     0  this   LTest<TT;>;" // should consider decoding this in javap
45               );
46
47        if (errors > 0)
48            throw new Error(errors + " found.");
49    }
50
51    File writeTestFile() throws IOException {
52        File f = new File("Test.java");
53        PrintWriter out = new PrintWriter(new BufferedWriter(new FileWriter(f)));
54        out.println("class Test<T> { }");
55        out.close();
56        return f;
57    }
58
59    File compileTestFile(File f) {
60        int rc = com.sun.tools.javac.Main.compile(new String[] { "-g", f.getPath() });
61        if (rc != 0)
62            throw new Error("compilation failed. rc=" + rc);
63        String path = f.getPath();
64        return new File(path.substring(0, path.length() - 5) + ".class");
65    }
66
67    String javap(File f) {
68        StringWriter sw = new StringWriter();
69        PrintWriter out = new PrintWriter(sw);
70        int rc = com.sun.tools.javap.Main.run(new String[] { "-v", f.getPath() }, out);
71        if (rc != 0)
72            throw new Error("javap failed. rc=" + rc);
73        out.close();
74        return sw.toString();
75    }
76
77    void verify(File classFile, String... expects) {
78        String output = javap(classFile);
79        for (String expect: expects) {
80            if (output.indexOf(expect)< 0)
81                error(expect + " not found");
82        }
83    }
84
85    void error(String msg) {
86        System.err.println(msg);
87        errors++;
88    }
89
90    int errors;
91}
92