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 
  31 import java.io.*;
  32 
  33 public 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 }