jdk8-mips64-public/hotspot: test/compiler/unsafe/GetUnsafeObjectG1PreBarrier.java@dbb05f6d93c4

8051344: JVM crashed in Compile::start() during method parsing w/ UseRTMDeopt turned on
Summary: call rtm_deopt() only if there were no compilation bailouts before.
Reviewed-by: kvn

     1 /*

     2  * Copyright (c) 2013, 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 8016474

    27  * @summary The bug only happens with C1 and G1 using a different ObjectAlignmentInBytes than KlassAlignmentInBytes (which is 8)

    28  * @run main/othervm -Xbatch -XX:+IgnoreUnrecognizedVMOptions -XX:ObjectAlignmentInBytes=32 GetUnsafeObjectG1PreBarrier

    29  */

    31 import java.lang.reflect.Field;

    33 import sun.misc.Unsafe;

    35 public class GetUnsafeObjectG1PreBarrier {

    36     private static final Unsafe unsafe;

    37     private static final int N = 100_000;

    39     static {

    40         try {

    41             Field theUnsafe = Unsafe.class.getDeclaredField("theUnsafe");

    42             theUnsafe.setAccessible(true);

    43             unsafe = (Unsafe) theUnsafe.get(null);

    44         } catch (NoSuchFieldException | IllegalAccessException e) {

    45             throw new IllegalStateException(e);

    46         }

    47     }

    49     public Object a;

    51     public static void main(String[] args) throws Throwable {

    52         new GetUnsafeObjectG1PreBarrier();

    53     }

    55     public GetUnsafeObjectG1PreBarrier() throws Throwable {

    56         doit();

    57     }

    59     private void doit() throws Throwable {

    60         Field field = GetUnsafeObjectG1PreBarrier.class.getField("a");

    61         long fieldOffset = unsafe.objectFieldOffset(field);

    63         for (int i = 0; i < N; i++) {

    64             readField(this, fieldOffset);

    65         }

    66     }

    68     private void readField(Object o, long fieldOffset) {

    69         unsafe.getObject(o, fieldOffset);

    70     }

    71 }

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

test/compiler/unsafe/GetUnsafeObjectG1PreBarrier.java@dbb05f6d93c4

test/compiler/unsafe/GetUnsafeObjectG1PreBarrier.java