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 package vm.mlvm.indy.func.jvmti.redefineClassInBootstrap;
  25 
  26 import java.lang.invoke.CallSite;
  27 import java.lang.invoke.MethodHandle;
  28 import java.lang.invoke.MethodHandles;
  29 import java.lang.invoke.MethodType;
  30 
  31 import vm.mlvm.share.MlvmTest;
  32 
  33 public class INDIFY_Dummy0 {
  34 
  35     private static MethodType MT_bootstrap() {
  36         return MethodType.methodType(CallSite.class, MethodHandles.Lookup.class, String.class, MethodType.class);
  37     }
  38 
  39     private static MethodHandle MH_bootstrap() throws NoSuchMethodException, IllegalAccessException  {
  40         return MethodHandles.lookup().findStatic(
  41                 INDIFY_Dummy0.class,
  42                 "bootstrap",
  43                 MT_bootstrap());
  44     }
  45 
  46     public static CallSite bootstrap(MethodHandles.Lookup l, String name, MethodType mt) throws Throwable {
  47         MlvmTest.getLog().display("Original bootstrap(): Lookup " + l + "; method name = " + name + "; method type = " + mt);
  48         redefineNow();
  49         throw new RuntimeException("Bootstrap method has not been redefined. Test failed.");
  50     }
  51 
  52     public static Boolean target(Object o, String s, int i) {
  53         MlvmTest.getLog().display("Original target called! Object = " + o + "; string = " + s + "; int = " + i);
  54         MlvmTest.getLog().display("The rest of methods are from " + (isRedefinedClass() ? "redefined" : "original") + " class");
  55         return false;
  56     }
  57 
  58     public static void redefineNow() {}
  59 
  60     private static MethodHandle INDY_call;
  61     private static MethodHandle INDY_call() throws Throwable {
  62         if (INDY_call != null)
  63             return INDY_call;
  64 
  65         CallSite cs = (CallSite) MH_bootstrap().invokeWithArguments(
  66                 MethodHandles.lookup(),
  67                 "greet",
  68                 MethodType.methodType(Boolean.class, Object.class, String.class, int.class));
  69 
  70         return cs.dynamicInvoker();
  71     }
  72 
  73     public static boolean invokeTarget() throws Throwable {
  74         return invokeTarget0();
  75     }
  76 
  77     private static boolean invokeTarget0() throws Throwable {
  78         //return (boolean) InvokeDynamic.greet(new Object(), "Redefined", 456);
  79         Object o = new Object();
  80         String s = "Original";
  81         int i = 456;
  82         return (Boolean) INDY_call().invokeExact(o, s, i);
  83     }
  84 
  85     public static boolean isRedefinedClass() {
  86         return false;
  87     }
  88 }