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annotate test/compiler/6579789/Test6579789.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 | 7223744c2784 |
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1 /* |
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2 * Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved. |
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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4 * |
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5 * This code is free software; you can redistribute it and/or modify it |
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6 * under the terms of the GNU General Public License version 2 only, as |
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7 * published by the Free Software Foundation. |
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8 * |
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9 * This code is distributed in the hope that it will be useful, but WITHOUT |
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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12 * version 2 for more details (a copy is included in the LICENSE file that |
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13 * accompanied this code). |
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14 * |
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15 * You should have received a copy of the GNU General Public License version |
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16 * 2 along with this work; if not, write to the Free Software Foundation, |
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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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. |
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22 * |
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23 */ |
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24 |
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25 /** |
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26 * @test |
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27 * @bug 6579789 |
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28 * @summary Internal error "c1_LinearScan.cpp:1429 Error: assert(false,"")" in debuggee with fastdebug VM |
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29 * @run main/othervm -Xcomp -XX:UseSSE=0 -XX:CompileOnly=Test6579789.bug Test6579789 |
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30 */ |
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31 |
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32 public class Test6579789 { |
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33 public static void main(String[] args) { |
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34 bug(4); |
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35 } |
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36 public static void bug(int n) { |
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37 float f = 1; |
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38 int i = 1; |
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39 try { |
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40 int x = 1 / n; // instruction that can trap |
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41 f = 2; |
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42 i = 2; |
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43 int y = 2 / n; // instruction that can trap |
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44 } catch (Exception ex) { |
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45 f++; |
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46 i++; |
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47 } |
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48 } |
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49 } |