1 /*
   2  * Copyright (c) 2017, 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  * @test
  26  * @bug 8174962 8010319
  27  * @summary Redefine class with interface method call
  28  * @library /test/lib
  29  * @modules java.base/jdk.internal.misc
  30  * @modules java.compiler
  31  *          java.instrument
  32  *          jdk.jartool/sun.tools.jar
  33  * @run main RedefineClassHelper
  34  * @run main/othervm -javaagent:redefineagent.jar -Xlog:redefine+class+update*=trace RedefineInterfaceCall
  35  */
  36 
  37 import static jdk.test.lib.Asserts.assertEquals;
  38 
  39 interface I1 { default int m() { return 0; } }
  40 interface I2 extends I1 {}
  41 
  42 // package access top-level class to avoid problem with RedefineClassHelper
  43 // and nested types.
  44 class RedefineInterfaceCall_C implements I2 {
  45     public int test(I2 i) {
  46         return i.m(); // invokeinterface cpCacheEntry
  47     }
  48 }
  49 
  50 public class RedefineInterfaceCall {
  51 
  52     static String newI1 =
  53       "interface I1 { default int m() { return 1; } }";
  54 
  55     static String newC =
  56         "class RedefineInterfaceCall_C implements I2 { " +
  57         "  public int test(I2 i) { " +
  58         "    return i.m(); " +
  59         "  } " +
  60         "} ";
  61 
  62     static int test(I2 i) {
  63         return i.m(); // invokeinterface cpCacheEntry
  64     }
  65 
  66     public static void main(String[] args) throws Exception {
  67         RedefineInterfaceCall_C c = new RedefineInterfaceCall_C();
  68 
  69         assertEquals(test(c),   0);
  70         assertEquals(c.test(c), 0);
  71 
  72         RedefineClassHelper.redefineClass(RedefineInterfaceCall_C.class, newC);
  73 
  74         assertEquals(c.test(c), 0);
  75 
  76         RedefineClassHelper.redefineClass(I1.class, newI1);
  77 
  78         assertEquals(test(c),   1);
  79         assertEquals(c.test(c), 1);
  80 
  81         RedefineClassHelper.redefineClass(RedefineInterfaceCall_C.class, newC);
  82 
  83         assertEquals(c.test(c), 1);
  84     }
  85 }