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/castToGrandparent.
  30  * VM Testbase keywords: [feature_mlvm]
  31  * VM Testbase readme:
  32  * DESCRIPTION
  33  *     Cast an object loaded with Unsafe.defineAnonymousClass to superclass of its parent class. This cast should succeed.
  34  *
  35  * @library /vmTestbase
  36  *          /test/lib
  37  * @run driver jdk.test.lib.FileInstaller . .
  38  *
  39  * @comment build test class and indify classes
  40  * @build vm.mlvm.anonloader.func.castToGrandparent.Test
  41  * @run driver vm.mlvm.share.IndifiedClassesBuilder
  42  *
  43  * @run main/othervm vm.mlvm.anonloader.func.castToGrandparent.Test
  44  */
  45 
  46 package vm.mlvm.anonloader.func.castToGrandparent;
  47 
  48 import vm.mlvm.anonloader.share.AnonkTestee01;
  49 import vm.mlvm.anonloader.share.AnonkTestee02;
  50 import vm.mlvm.share.Env;
  51 import vm.mlvm.share.MlvmTest;
  52 import vm.share.FileUtils;
  53 import vm.share.UnsafeAccess;
  54 
  55 public class Test extends MlvmTest {
  56     private static final Class<?> PARENT = AnonkTestee02.class;
  57 
  58     @Override
  59     public boolean run() throws Exception {
  60         byte[] classBytes = FileUtils.readClass(PARENT.getName());
  61         Class<?> cls = UnsafeAccess.unsafe.defineAnonymousClass(
  62                 PARENT, classBytes, null);
  63         Object anonObject = cls.newInstance();
  64         // Try to cast anonymous class to its grandparent
  65         AnonkTestee01 anonCastToParent = (AnonkTestee01) anonObject;
  66         if ( anonCastToParent.equals(anonObject) )
  67             Env.traceNormal("Anonymous object can be cast to original one");
  68 
  69         // Try to cast using another method
  70         new AnonkTestee01().getClass().cast(anonObject);
  71 
  72         Env.traceNormal("Anonymous class can be cast to original one");
  73 
  74         return true;
  75     }
  76 
  77     public static void main(String[] args) { MlvmTest.launch(args); }
  78 }