Mercurial > hg > truffle
annotate src/share/vm/gc_implementation/g1/g1SATBCardTableModRefBS.hpp @ 20211:82693fb204a5
8038930: G1CodeRootSet::test fails with assert(_num_chunks_handed_out == 0) failed: No elements must have been handed out yet
Summary: The test incorrectly assumed that it had been started with no other previous compilation activity. Fix this by allowing multiple code root free chunk lists, and use one separate from the global one to perform the test.
Reviewed-by: brutisso
| author | tschatzl |
|---|---|
| date | Wed, 16 Apr 2014 10:14:50 +0200 |
| parents | a9becfeecd1b |
| children | 4ca6dc0799b6 e5035defa3c4 |
| rev | line source |
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| 342 | 1 /* |
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2 * Copyright (c) 2001, 2013, Oracle and/or its affiliates. All rights reserved. |
| 342 | 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. |
| 342 | 22 * |
| 23 */ | |
| 24 | |
| 1972 | 25 #ifndef SHARE_VM_GC_IMPLEMENTATION_G1_G1SATBCARDTABLEMODREFBS_HPP |
| 26 #define SHARE_VM_GC_IMPLEMENTATION_G1_G1SATBCARDTABLEMODREFBS_HPP | |
| 27 | |
| 28 #include "memory/cardTableModRefBS.hpp" | |
| 29 #include "memory/memRegion.hpp" | |
| 30 #include "oops/oop.inline.hpp" | |
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31 #include "utilities/macros.hpp" |
| 1972 | 32 |
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33 #if INCLUDE_ALL_GCS |
| 342 | 34 |
| 35 class DirtyCardQueueSet; | |
| 36 | |
| 37 // This barrier is specialized to use a logging barrier to support | |
| 38 // snapshot-at-the-beginning marking. | |
| 39 | |
| 40 class G1SATBCardTableModRefBS: public CardTableModRefBSForCTRS { | |
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41 protected: |
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42 enum G1CardValues { |
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43 g1_young_gen = CT_MR_BS_last_reserved << 1 |
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44 }; |
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45 |
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46 public: |
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47 static int g1_young_card_val() { return g1_young_gen; } |
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48 |
| 342 | 49 // Add "pre_val" to a set of objects that may have been disconnected from the |
| 50 // pre-marking object graph. | |
| 51 static void enqueue(oop pre_val); | |
| 52 | |
| 53 G1SATBCardTableModRefBS(MemRegion whole_heap, | |
| 54 int max_covered_regions); | |
| 55 | |
| 56 bool is_a(BarrierSet::Name bsn) { | |
| 57 return bsn == BarrierSet::G1SATBCT || CardTableModRefBS::is_a(bsn); | |
| 58 } | |
| 59 | |
| 60 virtual bool has_write_ref_pre_barrier() { return true; } | |
| 61 | |
| 62 // This notes that we don't need to access any BarrierSet data | |
| 63 // structures, so this can be called from a static context. | |
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64 template <class T> static void write_ref_field_pre_static(T* field, oop newVal) { |
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65 T heap_oop = oopDesc::load_heap_oop(field); |
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66 if (!oopDesc::is_null(heap_oop)) { |
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67 enqueue(oopDesc::decode_heap_oop(heap_oop)); |
| 342 | 68 } |
| 69 } | |
| 70 | |
| 71 // We export this to make it available in cases where the static | |
| 72 // type of the barrier set is known. Note that it is non-virtual. | |
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73 template <class T> inline void inline_write_ref_field_pre(T* field, oop newVal) { |
| 342 | 74 write_ref_field_pre_static(field, newVal); |
| 75 } | |
| 76 | |
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77 // These are the more general virtual versions. |
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78 virtual void write_ref_field_pre_work(oop* field, oop new_val) { |
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79 inline_write_ref_field_pre(field, new_val); |
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80 } |
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81 virtual void write_ref_field_pre_work(narrowOop* field, oop new_val) { |
| 342 | 82 inline_write_ref_field_pre(field, new_val); |
| 83 } | |
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84 virtual void write_ref_field_pre_work(void* field, oop new_val) { |
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85 guarantee(false, "Not needed"); |
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86 } |
| 342 | 87 |
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88 template <class T> void write_ref_array_pre_work(T* dst, int count); |
| 2324 | 89 virtual void write_ref_array_pre(oop* dst, int count, bool dest_uninitialized) { |
| 90 if (!dest_uninitialized) { | |
| 91 write_ref_array_pre_work(dst, count); | |
| 92 } | |
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93 } |
| 2324 | 94 virtual void write_ref_array_pre(narrowOop* dst, int count, bool dest_uninitialized) { |
| 95 if (!dest_uninitialized) { | |
| 96 write_ref_array_pre_work(dst, count); | |
| 97 } | |
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98 } |
| 12343 | 99 |
| 100 /* | |
| 101 Claimed and deferred bits are used together in G1 during the evacuation | |
| 102 pause. These bits can have the following state transitions: | |
| 103 1. The claimed bit can be put over any other card state. Except that | |
| 104 the "dirty -> dirty and claimed" transition is checked for in | |
| 105 G1 code and is not used. | |
| 106 2. Deferred bit can be set only if the previous state of the card | |
| 107 was either clean or claimed. mark_card_deferred() is wait-free. | |
| 108 We do not care if the operation is be successful because if | |
| 109 it does not it will only result in duplicate entry in the update | |
| 110 buffer because of the "cache-miss". So it's not worth spinning. | |
| 111 */ | |
| 112 | |
| 113 bool is_card_claimed(size_t card_index) { | |
| 114 jbyte val = _byte_map[card_index]; | |
| 115 return (val & (clean_card_mask_val() | claimed_card_val())) == claimed_card_val(); | |
| 116 } | |
| 117 | |
| 118 void set_card_claimed(size_t card_index) { | |
| 119 jbyte val = _byte_map[card_index]; | |
| 120 if (val == clean_card_val()) { | |
| 121 val = (jbyte)claimed_card_val(); | |
| 122 } else { | |
| 123 val |= (jbyte)claimed_card_val(); | |
| 124 } | |
| 125 _byte_map[card_index] = val; | |
| 126 } | |
| 127 | |
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128 void verify_g1_young_region(MemRegion mr) PRODUCT_RETURN; |
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129 void g1_mark_as_young(const MemRegion& mr); |
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130 |
| 12343 | 131 bool mark_card_deferred(size_t card_index); |
| 132 | |
| 133 bool is_card_deferred(size_t card_index) { | |
| 134 jbyte val = _byte_map[card_index]; | |
| 135 return (val & (clean_card_mask_val() | deferred_card_val())) == deferred_card_val(); | |
| 136 } | |
| 137 | |
| 342 | 138 }; |
| 139 | |
| 140 // Adds card-table logging to the post-barrier. | |
| 141 // Usual invariant: all dirty cards are logged in the DirtyCardQueueSet. | |
| 142 class G1SATBCardTableLoggingModRefBS: public G1SATBCardTableModRefBS { | |
| 143 private: | |
| 144 DirtyCardQueueSet& _dcqs; | |
| 145 public: | |
| 146 G1SATBCardTableLoggingModRefBS(MemRegion whole_heap, | |
| 147 int max_covered_regions); | |
| 148 | |
| 149 bool is_a(BarrierSet::Name bsn) { | |
| 150 return bsn == BarrierSet::G1SATBCTLogging || | |
| 151 G1SATBCardTableModRefBS::is_a(bsn); | |
| 152 } | |
| 153 | |
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154 void write_ref_field_work(void* field, oop new_val, bool release = false); |
| 342 | 155 |
| 156 // Can be called from static contexts. | |
| 157 static void write_ref_field_static(void* field, oop new_val); | |
| 158 | |
| 159 // NB: if you do a whole-heap invalidation, the "usual invariant" defined | |
| 160 // above no longer applies. | |
| 161 void invalidate(MemRegion mr, bool whole_heap = false); | |
| 162 | |
| 163 void write_region_work(MemRegion mr) { invalidate(mr); } | |
| 164 void write_ref_array_work(MemRegion mr) { invalidate(mr); } | |
| 165 | |
| 166 | |
| 167 }; | |
| 168 | |
| 169 | |
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170 #endif // INCLUDE_ALL_GCS |
| 1972 | 171 |
| 172 #endif // SHARE_VM_GC_IMPLEMENTATION_G1_G1SATBCARDTABLEMODREFBS_HPP |