Mercurial > hg > truffle
annotate test/compiler/6659207/Test.java @ 1960:878b57474103
6978187: G1: assert(ParallelGCThreads> 1 || n_yielded() == _hrrs->occupied()) strikes again
Summary: An evacuation failure while copying the roots caused an object, A, to be forwarded to itself. During the subsequent RSet updating a reference to A was processed causing the reference to be added to the RSet of A's heap region. As a result of adding to the remembered set we ran into the issue described in 6930581 - the sparse table expanded and the RSet scanning code walked the cards in one instance of RHashTable (_cur) while the occupied() counts the cards in the expanded table (_next).
Reviewed-by: tonyp, iveresov
author | johnc |
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date | Tue, 16 Nov 2010 14:07:33 -0800 |
parents | c18cbe5936b8 |
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rev | line source |
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69 | 1 /* |
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2 * Copyright (c) 1997, 2008, Oracle and/or its affiliates. All rights reserved. |
177 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
69 | 4 * |
177 | 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. | |
69 | 8 * |
177 | 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). | |
69 | 14 * |
177 | 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. | |
69 | 18 * |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
69 | 22 * |
23 */ | |
24 | |
25 /* | |
26 * @test | |
27 * @bug 6659207 | |
28 * @summary access violation in CompilerThread0 | |
29 */ | |
30 | |
31 public class Test { | |
32 static int[] array = new int[12]; | |
33 | |
34 static int index(int i) { | |
35 if (i == 0) return 0; | |
36 for (int n = 0; n < array.length; n++) | |
37 if (i < array[n]) return n; | |
38 return -1; | |
39 } | |
40 | |
41 static int test(int i) { | |
42 int result = 0; | |
43 i = index(i); | |
44 if (i >= 0) | |
45 if (array[i] != 0) | |
46 result++; | |
47 | |
48 if (i != -1) | |
49 array[i]++; | |
50 | |
51 return result; | |
52 } | |
53 | |
54 public static void main(String[] args) { | |
55 int total = 0; | |
56 for (int i = 0; i < 100000; i++) { | |
57 total += test(10); | |
58 } | |
59 System.out.println(total); | |
60 } | |
61 } |