1 /*
   2  * Copyright (c) 2011, 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 7031108
  27  * @summary NPE in javac.jvm.ClassReader.findMethod in PackageElement.enclosedElements from AP in incr build
  28  * @library /tools/javac/lib
  29  * @modules java.compiler
  30  *          jdk.compiler
  31  * @build JavacTestingAbstractProcessor T7031108
  32  * @run main T7031108
  33  */
  34 
  35 import java.io.*;
  36 import java.net.*;
  37 import java.util.*;
  38 import javax.annotation.processing.*;
  39 import javax.lang.model.element.*;
  40 import javax.tools.*;
  41 import javax.tools.JavaCompiler.CompilationTask;
  42 
  43 public class T7031108 extends JavacTestingAbstractProcessor {
  44     public static void main(String... args) throws Exception {
  45         new T7031108().run();
  46     }
  47 
  48     /* Class containing a local class definition;
  49      * compiled class file will have an EnclosedMethod attribute.
  50      */
  51     static final JavaSource pC =
  52             new JavaSource("p/C.java",
  53                   "package p;\n"
  54                 + "class C {\n"
  55                 + "    void m() {\n"
  56                 + "        new Runnable() {\n"
  57                 + "            public void run() {\n"
  58                 + "                new Runnable() {\n"
  59                 + "                    public void run() { }\n"
  60                 + "                };\n"
  61                 + "            }\n"
  62                 + "        };\n"
  63                 + "    }\n"
  64                 + "}");
  65 
  66     private static final String PACKAGE_CONTENT_ERROR = "package does not contain C";
  67 
  68     /* Dummy source file to compile while running anno processor. */
  69     static final JavaSource dummy =
  70             new JavaSource("Dummy.java",
  71                 "class Dummy { }");
  72 
  73     void run() throws Exception {
  74         JavaCompiler comp = ToolProvider.getSystemJavaCompiler();
  75         try (StandardJavaFileManager fm = comp.getStandardFileManager(null, null, null)) {
  76 
  77             // step 1: compile test classes
  78             File cwd = new File(".");
  79             fm.setLocation(StandardLocation.CLASS_OUTPUT, Arrays.asList(cwd));
  80             compile(comp, fm, null, null, pC);
  81 
  82             // step 2: verify functioning of processor
  83             fm.setLocation(StandardLocation.ANNOTATION_PROCESSOR_PATH,
  84                     fm.getLocation(StandardLocation.CLASS_PATH));
  85             fm.setLocation(StandardLocation.CLASS_PATH, Arrays.asList(cwd));
  86             compile(comp, fm, null, getClass().getName(), dummy);
  87 
  88             File pC_class = new File(new File("p"), "C.class");
  89             pC_class.delete();
  90 
  91             DiagnosticCollector<JavaFileObject> dc = new DiagnosticCollector<JavaFileObject>();
  92             compile(comp, fm, dc, getClass().getName(), dummy);
  93             List<Diagnostic<? extends JavaFileObject>> diags =dc.getDiagnostics();
  94 
  95             System.err.println(diags);
  96             switch (diags.size()) {
  97                 case 0:
  98                     throw new Exception("no diagnostics received");
  99                 case 1:
 100                     String code = diags.get(0).getCode();
 101                     String expect = "compiler.err.proc.messager";
 102                     if (!expect.equals(code))
 103                         throw new Exception("unexpected diag code: " + code
 104                                 + ", expected: " + expect);
 105                     String message = diags.get(0).getMessage(null);
 106                     if (!PACKAGE_CONTENT_ERROR.equals(message)) {
 107                         throw new Exception("unexpected diag message: " + code
 108                                 + ", expected: " + PACKAGE_CONTENT_ERROR);
 109                     }
 110                     break;
 111                 default:
 112                     throw new Exception("unexpected diags received");
 113             }
 114         }
 115     }
 116 
 117     void compile(JavaCompiler comp, JavaFileManager fm,
 118             DiagnosticListener<JavaFileObject> dl,
 119             String processor, JavaFileObject... files) throws Exception {
 120         System.err.println("compile processor:" + processor + ", files:" + Arrays.asList(files));
 121         List<String> opts = new ArrayList<String>();
 122         if (processor != null) {
 123             // opts.add("-verbose");
 124             opts.addAll(Arrays.asList("-processor", processor));
 125         }
 126         CompilationTask task = comp.getTask(null, fm, dl, opts, null, Arrays.asList(files));
 127         boolean ok = task.call();
 128         if (dl == null && !ok)
 129             throw new Exception("compilation failed");
 130     }
 131 
 132     static class JavaSource extends SimpleJavaFileObject {
 133         JavaSource(String name, String text) {
 134             super(URI.create("js://" + name), JavaFileObject.Kind.SOURCE);
 135             this.text = text;
 136         }
 137         @Override
 138         public CharSequence getCharContent(boolean ignoreEncodingErrors) {
 139             return text;
 140         }
 141         final String text;
 142     }
 143 
 144     // annotation processor method
 145 
 146     @Override
 147     public boolean process(Set<? extends TypeElement> annotations, RoundEnvironment roundEnv) {
 148         if (!roundEnv.processingOver()) {
 149             PackageElement p = elements.getPackageElement("p");
 150             List<? extends Element> elems = p.getEnclosedElements();
 151             System.err.println("contents of package p: " + elems);
 152             if (elems.size() != 1 || !elems.get(0).getSimpleName().contentEquals("C")) {
 153                 messager.printMessage(Diagnostic.Kind.ERROR, PACKAGE_CONTENT_ERROR);
 154             }
 155         }
 156         return true;
 157     }
 158 }
 159