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 6716452
  26  * @summary need a method to get an index of an attribute
  27  * @modules jdk.jdeps/com.sun.tools.classfile
  28  */
  29 
  30 import java.io.*;
  31 import com.sun.tools.classfile.*;
  32 
  33 public class T6716452 {
  34     public static void main(String[] args) throws Exception {
  35         new T6716452().run();
  36     }
  37 
  38     public void run() throws Exception {
  39         File javaFile = writeTestFile();
  40         File classFile = compileTestFile(javaFile);
  41 
  42         ClassFile cf = ClassFile.read(classFile);
  43         for (Method m: cf.methods) {
  44             test(cf, m);
  45         }
  46 
  47         if (errors > 0)
  48             throw new Exception(errors + " errors found");
  49     }
  50 
  51     void test(ClassFile cf, Method m) {
  52         test(cf, m, Attribute.Code, Code_attribute.class);
  53         test(cf, m, Attribute.Exceptions, Exceptions_attribute.class);
  54     }
  55 
  56     // test the result of Attributes.getIndex according to expectations
  57     // encoded in the method's name
  58     void test(ClassFile cf, Method m, String name, Class<?> c) {
  59         int index = m.attributes.getIndex(cf.constant_pool, name);
  60         try {
  61             String m_name = m.getName(cf.constant_pool);
  62             System.err.println("Method " + m_name + " name:" + name + " index:" + index + " class: " + c);
  63             boolean expect = (m_name.equals("<init>") && name.equals("Code"))
  64                 || (m_name.indexOf(name) != -1);
  65             boolean found = (index != -1);
  66             if (expect) {
  67                 if (found) {
  68                     Attribute attr = m.attributes.get(index);
  69                     if (!c.isAssignableFrom(attr.getClass())) {
  70                         error(m + ": unexpected attribute found,"
  71                               + " expected " + c.getName()
  72                               + " found " + attr.getClass().getName());
  73                     }
  74                 } else {
  75                     error(m + ": expected attribute " + name + " not found");
  76                 }
  77             } else {
  78                 if (found) {
  79                     error(m + ": unexpected attribute " + name);
  80                 }
  81             }
  82         } catch (ConstantPoolException e) {
  83             error(m + ": " + e);
  84         }
  85     }
  86 
  87     File writeTestFile() throws IOException {
  88         File f = new File("Test.java");
  89         PrintWriter out = new PrintWriter(new BufferedWriter(new FileWriter(f)));
  90         out.println("abstract class Test { ");
  91         out.println("  abstract void m();");
  92         out.println("  void m_Code() { }");
  93         out.println("  abstract void m_Exceptions() throws Exception;");
  94         out.println("  void m_Code_Exceptions() throws Exception { }");
  95         out.println("}");
  96         out.close();
  97         return f;
  98     }
  99 
 100     File compileTestFile(File f) {
 101         int rc = com.sun.tools.javac.Main.compile(new String[] { "-g", f.getPath() });
 102         if (rc != 0)
 103             throw new Error("compilation failed. rc=" + rc);
 104         String path = f.getPath();
 105         return new File(path.substring(0, path.length() - 5) + ".class");
 106     }
 107 
 108     void error(String msg) {
 109         System.err.println("error: " + msg);
 110         errors++;
 111     }
 112 
 113     int errors;
 114 }