1 /*
   2  * Copyright (c) 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 8049365
  27  *  @summary Tests the JDI and JDWP update for modules
  28  *
  29  *  @modules jdk.jdi
  30  *  @run build TestScaffold VMConnection TargetListener TargetAdapter
  31  *  @run compile -g ModulesTest.java
  32  *  @run driver ModulesTest
  33  */
  34 import com.sun.jdi.*;
  35 import com.sun.jdi.event.*;
  36 import com.sun.jdi.request.*;
  37 
  38 import java.util.*;
  39 
  40     /********** target program **********/
  41 
  42 class ModulesTarg {
  43     static int[] intArray = new int[10];
  44 
  45     static {
  46         // make sure our class loader "creates" int[] before tested
  47         intArray[1] = 99;
  48     }
  49 
  50     public static void main(String[] args){
  51         System.out.println("Goodbye from ModulesTarg!");
  52     }
  53 }
  54 
  55     /********** test program **********/
  56 
  57 public class ModulesTest extends TestScaffold {
  58     ReferenceType targetClass;
  59 
  60     ModulesTest (String args[]) {
  61         super(args);
  62     }
  63 
  64     public static void main(String[] args)      throws Exception {
  65         new ModulesTest(args).startTests();
  66     }
  67 
  68     /********** test core **********/
  69 
  70     private void checkClassLoader(Module module, ClassLoaderReference loader) {
  71         List<ReferenceType> definedClasses = loader.definedClasses();
  72         List<ReferenceType> visibleClasses = loader.visibleClasses();
  73         String moduleName = module.name();
  74 
  75         println("    loader defined classes count: " + definedClasses.size());
  76         for (ReferenceType rt: definedClasses) {
  77             Module other = rt.module();
  78             if (!other.equals(module)) {
  79                 println("ModulesTest: broken class loader invariant for module: " + moduleName);
  80                 testFailed = true;
  81             }
  82         }
  83         for (ReferenceType type: visibleClasses) {
  84             if (!type.isPrepared()) continue; // skip unprepared classes
  85 
  86             Module other = type.module();
  87             String otherName = other.name();
  88             ClassLoaderReference otherLoader = other.classLoader();
  89             if (other == null) {
  90                 testFailed = true;
  91                 println("ModulesTest: failed: module reference is null #2");
  92             }
  93             if (otherName != null && !module.canRead(other)) {
  94                 println("    module: " + moduleName + " can not read the visible class module: " + otherName);
  95                 testFailed = true;
  96             }
  97         }
  98 
  99     }
 100 
 101     private void checkModule(Module module, Module other, int checkIdx) {
 102          if (module == null) {
 103              testFailed = true;
 104              println("ModulesTest: failed: module reference is null #1");
 105          }
 106          String name = module.name();
 107          println("\n--- Check #" + checkIdx);
 108          println("    module name: " + name);
 109 
 110          ClassLoaderReference loader = module.classLoader();
 111          println("    loader: " + loader);
 112 
 113          if (loader != null) {
 114              checkClassLoader(module, loader);
 115          }
 116 
 117          boolean cond = module.canRead(other);
 118          println("    can read: " + cond);
 119     }
 120 
 121     protected void runTests() throws Exception {
 122         /*
 123          * Get to the top of main() to determine targetClass
 124          */
 125         BreakpointEvent bpe = startToMain("ModulesTarg");
 126         targetClass = bpe.location().declaringType();
 127 
 128         int checkIdx = 0;
 129         List<Module> modules = vm().allModules();
 130         Module other = targetClass.module();
 131         checkModule(other, other, checkIdx++);
 132 
 133         for (Module module : modules) {
 134             checkModule(module, other, checkIdx++);
 135             other = module;
 136         }
 137 
 138         /*
 139          * resume the target until end
 140          */
 141         listenUntilVMDisconnect();
 142 
 143         /*
 144          * deal with results of test
 145          * if anything has called failure("foo") testFailed will be true
 146          */
 147         if (!testFailed) {
 148             println("ModulesTest: passed");
 149         } else {
 150             throw new Exception("ModulesTest: failed");
 151         }
 152     }
 153 }