Mercurial > hg > truffle
annotate test/compiler/6700047/Test6700047.java @ 3293:1f4413413144
7039089: G1: changeset for 7037276 broke heap verification, and related cleanups
Summary: In G1 heap verification, we no longer scan perm to G1-collected heap refs as part of process_strong_roots() but rather in a separate explicit oop iteration over the perm gen. This preserves the original perm card-marks. Added a new assertion in younger_refs_iterate() to catch a simple subcase where the user may have forgotten a prior save_marks() call, as happened in the case of G1's attempt to iterate perm to G1 refs when verifying the heap before exit. The assert was deliberately weakened for ParNew+CMS and will be fixed for that combination in a future CR. Also made some (non-G1) cleanups related to code and comments obsoleted by the migration of Symbols to the native heap.
Reviewed-by: iveresov, jmasa, tonyp
author | ysr |
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date | Tue, 26 Apr 2011 21:17:24 -0700 |
parents | c18cbe5936b8 |
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251 | 1 /* |
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2 * Copyright (c) 2008, Oracle and/or its affiliates. All rights reserved. |
251 | 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 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
251 | 22 */ |
23 | |
24 /** | |
25 * @test | |
26 * @bug 6700047 | |
27 * @summary C2 failed in idom_no_update | |
28 * @run main Test6700047 | |
29 */ | |
30 | |
31 public class Test6700047 { | |
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32 static byte[] dummy = new byte[256]; |
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33 |
251 | 34 public static void main(String[] args) { |
35 for (int i = 0; i < 100000; i++) { | |
36 intToLeftPaddedAsciiBytes(); | |
37 } | |
38 } | |
39 | |
40 public static int intToLeftPaddedAsciiBytes() { | |
41 int offset = 40; | |
42 int q; | |
43 int r; | |
44 int i = 100; | |
45 int result = 1; | |
46 while (offset > 0) { | |
47 q = (i * 52429); | |
48 r = i; | |
49 offset--; | |
50 i = q; | |
51 if (i == 0) { | |
52 break; | |
53 } | |
54 } | |
55 if (offset > 0) { | |
56 for(int j = 0; j < offset; j++) { | |
57 result++; | |
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58 dummy[i] = 0; |
251 | 59 } |
60 } | |
61 return result; | |
62 } | |
63 } |