jdk8-mips64-public/hotspot: test/runtime/RedefineTests/RedefineDoubleDelete.java@628176d22495

8178870: instrumentation.retransformClasses cause coredump
Summary: Don't double-free cached class bytes on redefinition loading failure.
Reviewed-by: sspitsyn, jiangli

     1 /*

     2  * Copyright (c) 2017, 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  */

    24 /*

    25  * @test

    26  * @bug 8178870

    27  * @summary Redefine class with CFLH twice to test deleting the cached_class_file

    28  */

    30 public class RedefineDoubleDelete {

    32     // Class gets a redefinition error because it adds a data member

    33     public static String newB =

    34                 "class RedefineDoubleDelete$B {" +

    35                 "   int count1 = 0;" +

    36                 "}";

    38     public static String newerB =

    39                 "class RedefineDoubleDelete$B { " +

    40                 "   int faa() { System.out.println(\"baa\"); return 2; }" +

    41                 "}";

    43     // The ClassFileLoadHook for this class turns foo into faa and prints out faa.

    44     static class B {

    45       int faa() { System.out.println("foo"); return 1; }

    46     }

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

    50         B b = new B();

    51         int val = b.faa();

    52         if (val != 1) {

    53             throw new RuntimeException("return value wrong " + val);

    54         }

    56         // Redefine B twice to get cached_class_file in both B scratch classes

    57         try {

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

    59         } catch (java.lang.UnsupportedOperationException e) {

    60             // this is expected

    61         }

    62         try {

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

    64         } catch (java.lang.UnsupportedOperationException e) {

    65             // this is expected

    66         }

    68         // Do a full GC.

    69         System.gc();

    71         // Redefine with a compatible class

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

    73         val = b.faa();

    74         if (val != 2) {

    75             throw new RuntimeException("return value wrong " + val);

    76         }

    78         // Do another full GC to clean things up.

    79         System.gc();

    80     }

    81 }

Mercurial > jdk8-mips64-public > hotspot / file revision

test/runtime/RedefineTests/RedefineDoubleDelete.java@628176d22495

test/runtime/RedefineTests/RedefineDoubleDelete.java