1 /*

     2  * Copyright (c) 2019, 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 8181171

    27  * @summary Test deleting static method pointing to by a jmethod

    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/native/othervm -javaagent:redefineagent.jar -Xlog:redefine+class*=trace RedefineDeleteJmethod

    35  */

    36 

    37 class B {

    38     private static int deleteMe() { System.out.println("deleteMe called"); return 5; }

    39     public static int callDeleteMe() { return deleteMe(); }

    40 }

    41 

    42 public class RedefineDeleteJmethod {

    43 

    44     public static String newB =

    45         "class B {" +

    46             "public static int callDeleteMe() { return 6; }" +

    47         "}";

    48 

    49     public static String newerB =

    50         "class B {" +

    51             "private static int deleteMe() { System.out.println(\"deleteMe (2) called\"); return 7; }" +

    52             "public static int callDeleteMe() { return deleteMe(); }" +

    53         "}";

    54 

    55 

    56     static {

    57         System.loadLibrary("RedefineDeleteJmethod");

    58     }

    59 

    60     static native int jniCallDeleteMe();

    61 

    62     static void test(int expected, boolean nsme_expected) throws Exception {

    63         // Call through static method

    64         int res = B.callDeleteMe();

    65         System.out.println("Result = " + res);

    66         if (res != expected) {

    67             throw new Error("returned " + res + " expected " + expected);

    68         }

    69 

    70         // Call through jmethodID, saved from first call.

    71         try {

    72             res = jniCallDeleteMe();

    73             if (nsme_expected) {

    74                 throw new RuntimeException("Failed, NoSuchMethodError expected");

    75             }

    76             if (res != expected) {

    77                 throw new Error("returned " + res + " expected " + expected);

    78             }

    79         } catch (NoSuchMethodError ex) {

    80             if (!nsme_expected) {

    81                 throw new RuntimeException("Failed, NoSuchMethodError not expected");

    82             }

    83             System.out.println("Passed, NoSuchMethodError expected");

    84         }

    85     }

    86 

    87     public static void main(String[] args) throws Exception {

    88         test(5, false);

    89         RedefineClassHelper.redefineClass(B.class, newB);

    90         test(6, true);

    91         RedefineClassHelper.redefineClass(B.class, newerB);

    92         test(7, true);

    93     }

    94 }