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annotate src/share/vm/gc_implementation/g1/g1_specialized_oop_closures.hpp @ 20652:e8bf410d5e23

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8058209: Race in G1 card scanning could allow scanning of memory covered by PLABs Summary: Read _top before _gc_time_stamp in saved_mark_word() with LoadLoad order to ensure we get a consistent view Reviewed-by: brutisso, dcubed, dholmes, stefank
author mgerdin
date Fri, 14 Nov 2014 14:23:25 +0100
parents 2c6ef90f030a
children 7848fc12602b
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1 /*
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2 * Copyright (c) 2001, 2012, 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 #ifndef SHARE_VM_GC_IMPLEMENTATION_G1_G1_SPECIALIZED_OOP_CLOSURES_HPP
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26 #define SHARE_VM_GC_IMPLEMENTATION_G1_G1_SPECIALIZED_OOP_CLOSURES_HPP
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27
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28 // The following OopClosure types get specialized versions of
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29 // "oop_oop_iterate" that invoke the closures' do_oop methods
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30 // non-virtually, using a mechanism defined in this file. Extend these
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31 // macros in the obvious way to add specializations for new closures.
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32
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33 enum G1Barrier {
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34 G1BarrierNone,
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35 G1BarrierEvac,
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36 G1BarrierKlass
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37 };
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38
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39 enum G1Mark {
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40 G1MarkNone,
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41 G1MarkFromRoot,
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42 G1MarkPromotedFromRoot
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43 };
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44
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45 // Forward declarations.
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46
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47 template<G1Barrier barrier, G1Mark do_mark_object>
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48 class G1ParCopyClosure;
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49
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50 class G1ParScanClosure;
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51 class G1ParPushHeapRSClosure;
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53 class FilterIntoCSClosure;
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54 class FilterOutOfRegionClosure;
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55 class G1CMOopClosure;
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56 class G1RootRegionScanClosure;
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57
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58 // Specialized oop closures from g1RemSet.cpp
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59 class G1Mux2Closure;
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60 class G1TriggerClosure;
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61 class G1InvokeIfNotTriggeredClosure;
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62 class G1UpdateRSOrPushRefOopClosure;
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64 #ifdef FURTHER_SPECIALIZED_OOP_OOP_ITERATE_CLOSURES
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65 #error "FURTHER_SPECIALIZED_OOP_OOP_ITERATE_CLOSURES already defined."
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66 #endif
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67
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68 #define FURTHER_SPECIALIZED_OOP_OOP_ITERATE_CLOSURES(f) \
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69 f(G1ParScanClosure,_nv) \
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70 f(G1ParPushHeapRSClosure,_nv) \
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71 f(FilterIntoCSClosure,_nv) \
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72 f(FilterOutOfRegionClosure,_nv) \
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73 f(G1CMOopClosure,_nv) \
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74 f(G1RootRegionScanClosure,_nv) \
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75 f(G1Mux2Closure,_nv) \
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76 f(G1TriggerClosure,_nv) \
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77 f(G1InvokeIfNotTriggeredClosure,_nv) \
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78 f(G1UpdateRSOrPushRefOopClosure,_nv)
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79
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80 #ifdef FURTHER_SPECIALIZED_SINCE_SAVE_MARKS_CLOSURES
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81 #error "FURTHER_SPECIALIZED_SINCE_SAVE_MARKS_CLOSURES already defined."
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82 #endif
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83
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84 #define FURTHER_SPECIALIZED_SINCE_SAVE_MARKS_CLOSURES(f)
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86 #endif // SHARE_VM_GC_IMPLEMENTATION_G1_G1_SPECIALIZED_OOP_CLOSURES_HPP