1 /*
   2  * Copyright (c) 2013, 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 8006334
  27  * @summary javap: JavapTask constructor breaks with null pointer exception if
  28  * parameter options is null
  29  * @modules jdk.jdeps
  30  */
  31 
  32 import java.io.File;
  33 import java.util.Arrays;
  34 import java.io.PrintWriter;
  35 import java.io.StringWriter;
  36 import java.util.List;
  37 import java.util.Locale;
  38 import javax.tools.Diagnostic;
  39 import javax.tools.DiagnosticCollector;
  40 import javax.tools.JavaFileManager;
  41 import javax.tools.JavaFileObject;
  42 import com.sun.tools.javap.JavapFileManager;
  43 import com.sun.tools.javap.JavapTask;
  44 
  45 public class JavapTaskCtorFailWithNPE {
  46 
  47     //we will also check the output just to confirm that we get the expected one
  48     private static final String expOutput =
  49         "Compiled from \"JavapTaskCtorFailWithNPE.java\"\n" +
  50         "public class JavapTaskCtorFailWithNPE {\n" +
  51         "  public JavapTaskCtorFailWithNPE();\n" +
  52         "  public static void main(java.lang.String[]);\n" +
  53         "}\n";
  54 
  55     public static void main(String[] args) {
  56         new JavapTaskCtorFailWithNPE().run();
  57     }
  58 
  59     private void run() {
  60         File classToCheck = new File(System.getProperty("test.classes"),
  61             getClass().getSimpleName() + ".class");
  62 
  63         DiagnosticCollector<JavaFileObject> dc =
  64                 new DiagnosticCollector<JavaFileObject>();
  65         StringWriter sw = new StringWriter();
  66         PrintWriter pw = new PrintWriter(sw);
  67         JavaFileManager fm = JavapFileManager.create(dc, pw);
  68         JavapTask t = new JavapTask(pw, fm, dc, null,
  69                 Arrays.asList(classToCheck.getPath()));
  70         if (t.run() != 0)
  71             throw new Error("javap failed unexpectedly");
  72 
  73         List<Diagnostic<? extends JavaFileObject>> diags = dc.getDiagnostics();
  74         for (Diagnostic<? extends JavaFileObject> d: diags) {
  75             if (d.getKind() == Diagnostic.Kind.ERROR)
  76                 throw new AssertionError(d.getMessage(Locale.ENGLISH));
  77         }
  78         String lineSep = System.getProperty("line.separator");
  79         String out = sw.toString().replace(lineSep, "\n");
  80         if (!out.equals(expOutput)) {
  81             throw new AssertionError("The output is not equal to the one expected");
  82         }
  83     }
  84 
  85 }