jdk8-mips64-public/hotspot: test/compiler/6843752/Test.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) 2009, 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 6843752

    27  * @summary missing code for an anti-dependent Phi in GCM

    28  * @run main/othervm -Xbatch Test

    29  */

    31 public class Test {

    33     Item list;

    35     static class Item {

    36         public Item    next;

    37         public Item    prev;

    38         public boolean remove;

    40         Item(boolean r) { remove = r; }

    41     }

    43     private void linkIn(Item item) {

    44         Item head = list;

    45         if (head == null) {

    46             item.next = item;

    47             item.prev = item;

    48             list = item;

    49         } else {

    50             item.next = head;

    51             item.prev = head.prev;

    52             head.prev.next = item;

    53             head.prev = item;

    54         }

    55     }

    57     private void linkOut(Item item) {

    58         Item head = list;

    59         if (item.next == item) {

    60             list = null;

    61         } else {

    62             item.prev.next = item.next;

    63             item.next.prev = item.prev;

    64             if (head == item) {

    65                 list = item.next;

    66             }

    67         }

    68         item.next = null;

    69         item.prev = null; // this is the null pointer we are seeing

    70     }

    72     private void removeItems(int numItems) {

    73         Item item = list;

    74         if (item == null) {

    75             return;

    76         }

    77         Item last = item.prev;

    78         boolean done = false;

    79         while (!done && numItems > 1) {

    80             // the original code "done = (item == last);" triggered an infinite loop

    81             // and was changed slightly in order to produce an exception instead.

    82             done = (item.next == last.next);

    83             item = item.next;

    84             if (item.prev.remove) {

    85                 linkOut(item.prev);

    86             }

    87         }

    88     }

    90     public void perform(int numItems) {

    91         for (int i = 0; i < numItems; i++) {

    92             linkIn(new Item(i == 0));

    93         }

    94         removeItems(numItems);

    95         list = null;

    96     }

    98     static public void main(String[] args) {

    99         int caseCnt = 0;

   100         Test bj = new Test();

   101         try {

   102             for (; caseCnt < 500000;) {

   103                 int numItems = (++caseCnt % 2);

   104                 if ((caseCnt % 64) == 0) {

   105                     numItems = 5;

   106                 }

   107                 bj.perform(numItems);

   108                 if ((caseCnt % 100000) == 0) {

   109                     System.out.println("successfully performed " + caseCnt + " cases");

   110                 }

   111             }

   112         } catch (Exception e) {

   113             System.out.println("ERROR: crashed during case " + caseCnt);

   114             e.printStackTrace(System.out);

   115             System.exit(97);

   116         }

   117     }

   118 }

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

test/compiler/6843752/Test.java@dbb05f6d93c4

test/compiler/6843752/Test.java