1 /*
   2  * Copyright (c) 2010, 2018, 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 /*
  26  * @test
  27  * @modules java.base/jdk.internal.misc
  28  *
  29  * @summary converted from VM Testbase vm/mlvm/anonloader/func/castToParent.
  30  * VM Testbase keywords: [feature_mlvm, clarify-spec, exclude]
  31  * VM Testbase comments: 8199227
  32  * VM Testbase readme:
  33  * DESCRIPTION
  34  *     Try to cast an object of a class, which is loaded by Unsafe.defineAnonymousClass to its
  35  *     parent (called AnonkTestee01) using the following cast methods:
  36  *         - (AnonkTestee01) o
  37  *         - o.getClass().cast(new AnonkTestee01());
  38  *
  39  * @library /vmTestbase
  40  *          /test/lib
  41  * @run driver jdk.test.lib.FileInstaller . .
  42  * @ignore 8199227
  43  *
  44  * @comment build test class and indify classes
  45  * @build vm.mlvm.anonloader.func.castToParent.Test
  46  * @run driver vm.mlvm.share.IndifiedClassesBuilder
  47  *
  48  * @run main/othervm vm.mlvm.anonloader.func.castToParent.Test
  49  */
  50 
  51 package vm.mlvm.anonloader.func.castToParent;
  52 
  53 import vm.mlvm.anonloader.share.AnonkTestee01;
  54 import vm.mlvm.share.Env;
  55 import vm.mlvm.share.MlvmTest;
  56 import vm.share.FileUtils;
  57 import vm.share.UnsafeAccess;
  58 
  59 public class Test extends MlvmTest {
  60     private static final Class<?> PARENT = AnonkTestee01.class;
  61 
  62     public boolean run() throws Exception {
  63         byte[] classBytes = FileUtils.readClass(PARENT.getName());
  64         Class<?> cls = UnsafeAccess.unsafe.defineAnonymousClass(PARENT,
  65                 classBytes, null);
  66         Object o = cls.newInstance();
  67         // Try to cast anonymous class to its parent
  68         AnonkTestee01 anonCastToParent = (AnonkTestee01) o;
  69         if ( anonCastToParent.equals(o) )
  70             Env.traceNormal("Anonymous object can be cast to original one");
  71 
  72         // Cast the class
  73         new AnonkTestee01().getClass().cast(o);
  74 
  75         Env.traceNormal("Anonymous can be cast to original class");
  76 
  77         return true;
  78     }
  79 
  80     public static void main(String[] args) { MlvmTest.launch(args); }
  81 }