1 /*
   2  * Copyright (c) 2014, 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 6898851
  27  * @summary Compiling against this corrupt class file causes a stacktrace from javac
  28  * @modules jdk.compiler/com.sun.tools.classfile
  29  */
  30 
  31 import java.io.File;
  32 import java.io.FileWriter;
  33 import java.io.StringWriter;
  34 import java.io.PrintWriter;
  35 import java.io.IOException;
  36 
  37 import com.sun.tools.classfile.ClassFile;
  38 import com.sun.tools.classfile.ClassWriter;
  39 import com.sun.tools.javac.Main;
  40 
  41 public class BadClass {
  42     // Create and compile file containing body; return compiler output
  43     static String makeClass(String dir, String filename, String body) throws IOException {
  44         File file = new File(dir, filename);
  45         try (FileWriter fw = new FileWriter(file)) {
  46             fw.write(body);
  47         }
  48 
  49         StringWriter sw = new StringWriter();
  50         PrintWriter pw = new PrintWriter(sw);
  51         String args[] = { "-cp", dir, "-d", dir, "-XDrawDiagnostics", file.getPath() };
  52         Main.compile(args, pw);
  53         pw.close();
  54         return sw.toString();
  55     }
  56 
  57     public static void main(String... args) throws Exception {
  58         new File("d1").mkdir();
  59         new File("d2").mkdir();
  60 
  61         // Step 1. build an empty class with an interface
  62         makeClass("d1", "Empty.java", "abstract class Empty implements Readable {}");
  63 
  64         // Step 2. Modify classfile to have invalid constant pool index
  65         ClassFile cf = ClassFile.read(new File("d1","Empty.class"));
  66         cf.interfaces[0] = cf.constant_pool.size() + 10;
  67         ClassWriter cw = new ClassWriter();
  68         cw.write(cf, new File("d2","Empty.class"));
  69 
  70         // Step 3. Compile use of invalid class
  71         String result = makeClass("d2", "EmptyUse.java", "class EmptyUse { Empty e; }");
  72         if (!result.contains("compiler.misc.bad.class.file")) {
  73             System.out.println(result);
  74             throw new Exception("test failed");
  75         }
  76     }
  77 }