1 /*

     2  * Copyright (c) 2008, 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 6724218

    27  * @summary Fix raise_LCA_above_marks() early termination

    28  *

    29  * @run main/othervm -Xbatch

    30  *      -XX:CompileCommand=exclude,compiler.c2.Test6724218::update

    31  *      compiler.c2.Test6724218

    32  */

    33 

    34 package compiler.c2;

    35 

    36 public class Test6724218 {

    37     Test6724218 next  = null;

    38     Object value = null;

    39 

    40     static boolean _closed = false;

    41     static int size = 0;

    42     static Test6724218 list  = null;

    43     static int cache_size = 0;

    44     static Test6724218 cache = null;

    45 

    46     Object get(int i) {

    47         Test6724218 t = list;

    48         list = t.next;

    49         size -= 1;

    50         Object o = t.value;

    51         if (i > 0) {

    52             t.next = cache;

    53             t.value = null;

    54             cache = t;

    55             cache_size = +1;

    56         }

    57         return o;

    58     }

    59 

    60     void update() {

    61         // Exclude compilation of this one.

    62         if (size == 0) {

    63             Test6724218 t;

    64             if (cache_size > 0) {

    65                 t = cache;

    66                 cache = t.next;

    67                 cache_size = -1;

    68             } else {

    69                 t = new Test6724218();

    70             }

    71             t.value = new Object();

    72             t.next = list;

    73             list = t;

    74             size += 1;

    75         }

    76     }

    77 

    78     synchronized Object test(int i) {

    79         while (true) {

    80             if (_closed) {

    81                 return null;

    82             } else if (size > 0) {

    83                 return get(i);

    84             }

    85             update();

    86         }

    87     }

    88 

    89     public static void main(String argv[]) throws Exception {

    90         Test6724218 t = new Test6724218();

    91         int lim = 500000;

    92         Object o;

    93         for (int j = 0; j < lim; j++) {

    94             o = t.test(j&1);

    95             if (o == null) {

    96               throw new Exception("*** Failed on iteration " + j);

    97             }

    98             if ((j&1) == 0) {

    99               t.update();

   100             }

   101         }

   102     }

   103 }