Y. Srinivas Ramakrishna | 18f3386 | 2008-06-05 15:57:56 -0700 | [diff] [blame] | 1 | /* |
Goetz Lindenmaier | 6397e80 | 2016-01-18 10:25:41 +0100 | [diff] [blame] | 2 | * Copyright (c) 2001, 2016, Oracle and/or its affiliates. All rights reserved. |
Y. Srinivas Ramakrishna | 18f3386 | 2008-06-05 15:57:56 -0700 | [diff] [blame] | 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 | * |
Erik Trimble | ba7c173 | 2010-05-27 19:08:38 -0700 | [diff] [blame] | 19 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| 20 | * or visit www.oracle.com if you need additional information or have any |
| 21 | * questions. |
Y. Srinivas Ramakrishna | 18f3386 | 2008-06-05 15:57:56 -0700 | [diff] [blame] | 22 | * |
| 23 | */ |
| 24 | |
Per Lidén | 4dc240f | 2015-05-13 15:16:06 +0200 | [diff] [blame] | 25 | #ifndef SHARE_VM_GC_G1_G1SATBCARDTABLEMODREFBS_HPP |
| 26 | #define SHARE_VM_GC_G1_G1SATBCARDTABLEMODREFBS_HPP |
Stefan Karlsson | 8006fe8 | 2010-11-23 13:22:55 -0800 | [diff] [blame] | 27 | |
Per Lidén | 4dc240f | 2015-05-13 15:16:06 +0200 | [diff] [blame] | 28 | #include "gc/g1/g1RegionToSpaceMapper.hpp" |
| 29 | #include "gc/shared/cardTableModRefBS.hpp" |
Stefan Karlsson | 8006fe8 | 2010-11-23 13:22:55 -0800 | [diff] [blame] | 30 | #include "memory/memRegion.hpp" |
Stefan Karlsson | 4913ad5 | 2015-02-13 14:37:35 +0100 | [diff] [blame] | 31 | #include "oops/oop.hpp" |
Joseph Provino | 698fba9 | 2013-01-23 13:02:39 -0500 | [diff] [blame] | 32 | #include "utilities/macros.hpp" |
Stefan Karlsson | 8006fe8 | 2010-11-23 13:22:55 -0800 | [diff] [blame] | 33 | |
Y. Srinivas Ramakrishna | 18f3386 | 2008-06-05 15:57:56 -0700 | [diff] [blame] | 34 | class DirtyCardQueueSet; |
Thomas Schatzl | 100e51a | 2014-08-19 14:09:10 +0200 | [diff] [blame] | 35 | class G1SATBCardTableLoggingModRefBS; |
Y. Srinivas Ramakrishna | 18f3386 | 2008-06-05 15:57:56 -0700 | [diff] [blame] | 36 | |
| 37 | // This barrier is specialized to use a logging barrier to support |
| 38 | // snapshot-at-the-beginning marking. |
| 39 | |
Kim Barrett | 57198d2 | 2014-12-18 13:26:37 -0500 | [diff] [blame] | 40 | class G1SATBCardTableModRefBS: public CardTableModRefBS { |
Christian Thalinger | 16526e0 | 2015-10-08 12:49:30 -1000 | [diff] [blame] | 41 | friend class VMStructs; |
Mikael Gerdin | 7f3b537 | 2013-10-08 17:35:51 +0200 | [diff] [blame] | 42 | protected: |
| 43 | enum G1CardValues { |
| 44 | g1_young_gen = CT_MR_BS_last_reserved << 1 |
| 45 | }; |
| 46 | |
Kim Barrett | 40d3986 | 2015-02-27 19:52:48 -0500 | [diff] [blame] | 47 | G1SATBCardTableModRefBS(MemRegion whole_heap, const BarrierSet::FakeRtti& fake_rtti); |
Joseph Provino | 3bd0857 | 2015-01-27 13:50:31 -0500 | [diff] [blame] | 48 | ~G1SATBCardTableModRefBS() { } |
| 49 | |
John Cuthbertson | a08e1ce | 2011-04-07 09:53:20 -0700 | [diff] [blame] | 50 | public: |
Mikael Gerdin | 7f3b537 | 2013-10-08 17:35:51 +0200 | [diff] [blame] | 51 | static int g1_young_card_val() { return g1_young_gen; } |
| 52 | |
Y. Srinivas Ramakrishna | 18f3386 | 2008-06-05 15:57:56 -0700 | [diff] [blame] | 53 | // Add "pre_val" to a set of objects that may have been disconnected from the |
| 54 | // pre-marking object graph. |
| 55 | static void enqueue(oop pre_val); |
| 56 | |
Y. Srinivas Ramakrishna | 18f3386 | 2008-06-05 15:57:56 -0700 | [diff] [blame] | 57 | virtual bool has_write_ref_pre_barrier() { return true; } |
| 58 | |
Per Lidén | 6f81963 | 2015-11-06 09:46:54 +0100 | [diff] [blame] | 59 | // We export this to make it available in cases where the static |
| 60 | // type of the barrier set is known. Note that it is non-virtual. |
Goetz Lindenmaier | 6397e80 | 2016-01-18 10:25:41 +0100 | [diff] [blame] | 61 | template <class T> inline void inline_write_ref_field_pre(T* field, oop newVal); |
Y. Srinivas Ramakrishna | 18f3386 | 2008-06-05 15:57:56 -0700 | [diff] [blame] | 62 | |
Y. Srinivas Ramakrishna | 075c133 | 2009-07-14 15:40:39 -0700 | [diff] [blame] | 63 | // These are the more general virtual versions. |
Goetz Lindenmaier | 6397e80 | 2016-01-18 10:25:41 +0100 | [diff] [blame] | 64 | inline virtual void write_ref_field_pre_work(oop* field, oop new_val); |
| 65 | inline virtual void write_ref_field_pre_work(narrowOop* field, oop new_val); |
Y. Srinivas Ramakrishna | 075c133 | 2009-07-14 15:40:39 -0700 | [diff] [blame] | 66 | virtual void write_ref_field_pre_work(void* field, oop new_val) { |
| 67 | guarantee(false, "Not needed"); |
| 68 | } |
Y. Srinivas Ramakrishna | 18f3386 | 2008-06-05 15:57:56 -0700 | [diff] [blame] | 69 | |
Y. Srinivas Ramakrishna | 075c133 | 2009-07-14 15:40:39 -0700 | [diff] [blame] | 70 | template <class T> void write_ref_array_pre_work(T* dst, int count); |
Mikael Gerdin | ebdab47 | 2014-06-26 13:20:18 +0200 | [diff] [blame] | 71 | virtual void write_ref_array_pre(oop* dst, int count, bool dest_uninitialized); |
| 72 | virtual void write_ref_array_pre(narrowOop* dst, int count, bool dest_uninitialized); |
Mikael Gerdin | b8363e6 | 2013-09-24 14:46:29 +0200 | [diff] [blame] | 73 | |
| 74 | /* |
| 75 | Claimed and deferred bits are used together in G1 during the evacuation |
| 76 | pause. These bits can have the following state transitions: |
| 77 | 1. The claimed bit can be put over any other card state. Except that |
| 78 | the "dirty -> dirty and claimed" transition is checked for in |
| 79 | G1 code and is not used. |
| 80 | 2. Deferred bit can be set only if the previous state of the card |
| 81 | was either clean or claimed. mark_card_deferred() is wait-free. |
| 82 | We do not care if the operation is be successful because if |
| 83 | it does not it will only result in duplicate entry in the update |
| 84 | buffer because of the "cache-miss". So it's not worth spinning. |
| 85 | */ |
| 86 | |
| 87 | bool is_card_claimed(size_t card_index) { |
| 88 | jbyte val = _byte_map[card_index]; |
| 89 | return (val & (clean_card_mask_val() | claimed_card_val())) == claimed_card_val(); |
| 90 | } |
| 91 | |
Goetz Lindenmaier | 6397e80 | 2016-01-18 10:25:41 +0100 | [diff] [blame] | 92 | inline void set_card_claimed(size_t card_index); |
Mikael Gerdin | b8363e6 | 2013-09-24 14:46:29 +0200 | [diff] [blame] | 93 | |
Mikael Gerdin | 7f3b537 | 2013-10-08 17:35:51 +0200 | [diff] [blame] | 94 | void verify_g1_young_region(MemRegion mr) PRODUCT_RETURN; |
| 95 | void g1_mark_as_young(const MemRegion& mr); |
| 96 | |
Mikael Gerdin | b8363e6 | 2013-09-24 14:46:29 +0200 | [diff] [blame] | 97 | bool mark_card_deferred(size_t card_index); |
| 98 | |
| 99 | bool is_card_deferred(size_t card_index) { |
| 100 | jbyte val = _byte_map[card_index]; |
| 101 | return (val & (clean_card_mask_val() | deferred_card_val())) == deferred_card_val(); |
| 102 | } |
Christian Thalinger | 16526e0 | 2015-10-08 12:49:30 -1000 | [diff] [blame] | 103 | virtual void write_ref_nmethod_pre(oop* dst, nmethod* nm); |
| 104 | virtual void write_ref_nmethod_post(oop* dst, nmethod* nm); |
| 105 | |
Thomas Schatzl | 100e51a | 2014-08-19 14:09:10 +0200 | [diff] [blame] | 106 | }; |
Mikael Gerdin | b8363e6 | 2013-09-24 14:46:29 +0200 | [diff] [blame] | 107 | |
Kim Barrett | 40d3986 | 2015-02-27 19:52:48 -0500 | [diff] [blame] | 108 | template<> |
| 109 | struct BarrierSet::GetName<G1SATBCardTableModRefBS> { |
| 110 | static const BarrierSet::Name value = BarrierSet::G1SATBCT; |
| 111 | }; |
| 112 | |
Thomas Schatzl | 100e51a | 2014-08-19 14:09:10 +0200 | [diff] [blame] | 113 | class G1SATBCardTableLoggingModRefBSChangedListener : public G1MappingChangedListener { |
| 114 | private: |
| 115 | G1SATBCardTableLoggingModRefBS* _card_table; |
| 116 | public: |
| 117 | G1SATBCardTableLoggingModRefBSChangedListener() : _card_table(NULL) { } |
| 118 | |
| 119 | void set_card_table(G1SATBCardTableLoggingModRefBS* card_table) { _card_table = card_table; } |
| 120 | |
Thomas Schatzl | 60f3ade | 2014-10-09 11:40:11 +0200 | [diff] [blame] | 121 | virtual void on_commit(uint start_idx, size_t num_regions, bool zero_filled); |
Y. Srinivas Ramakrishna | 18f3386 | 2008-06-05 15:57:56 -0700 | [diff] [blame] | 122 | }; |
| 123 | |
| 124 | // Adds card-table logging to the post-barrier. |
| 125 | // Usual invariant: all dirty cards are logged in the DirtyCardQueueSet. |
| 126 | class G1SATBCardTableLoggingModRefBS: public G1SATBCardTableModRefBS { |
Thomas Schatzl | 100e51a | 2014-08-19 14:09:10 +0200 | [diff] [blame] | 127 | friend class G1SATBCardTableLoggingModRefBSChangedListener; |
Y. Srinivas Ramakrishna | 18f3386 | 2008-06-05 15:57:56 -0700 | [diff] [blame] | 128 | private: |
Thomas Schatzl | 100e51a | 2014-08-19 14:09:10 +0200 | [diff] [blame] | 129 | G1SATBCardTableLoggingModRefBSChangedListener _listener; |
Y. Srinivas Ramakrishna | 18f3386 | 2008-06-05 15:57:56 -0700 | [diff] [blame] | 130 | DirtyCardQueueSet& _dcqs; |
Kim Barrett | 8ebc838 | 2015-09-02 11:41:42 -0400 | [diff] [blame] | 131 | |
| 132 | protected: |
| 133 | virtual void write_ref_field_work(void* field, oop new_val, bool release); |
| 134 | |
Y. Srinivas Ramakrishna | 18f3386 | 2008-06-05 15:57:56 -0700 | [diff] [blame] | 135 | public: |
Thomas Schatzl | 100e51a | 2014-08-19 14:09:10 +0200 | [diff] [blame] | 136 | static size_t compute_size(size_t mem_region_size_in_words) { |
| 137 | size_t number_of_slots = (mem_region_size_in_words / card_size_in_words); |
| 138 | return ReservedSpace::allocation_align_size_up(number_of_slots); |
| 139 | } |
| 140 | |
Thomas Schatzl | e08169c | 2015-04-27 10:04:26 +0200 | [diff] [blame] | 141 | // Returns how many bytes of the heap a single byte of the Card Table corresponds to. |
| 142 | static size_t heap_map_factor() { |
| 143 | return CardTableModRefBS::card_size; |
| 144 | } |
| 145 | |
Erik Helin | f3997d8 | 2014-11-18 10:36:42 +0100 | [diff] [blame] | 146 | G1SATBCardTableLoggingModRefBS(MemRegion whole_heap); |
Y. Srinivas Ramakrishna | 18f3386 | 2008-06-05 15:57:56 -0700 | [diff] [blame] | 147 | |
Thomas Schatzl | 100e51a | 2014-08-19 14:09:10 +0200 | [diff] [blame] | 148 | virtual void initialize() { } |
| 149 | virtual void initialize(G1RegionToSpaceMapper* mapper); |
| 150 | |
| 151 | virtual void resize_covered_region(MemRegion new_region) { ShouldNotReachHere(); } |
| 152 | |
Y. Srinivas Ramakrishna | 18f3386 | 2008-06-05 15:57:56 -0700 | [diff] [blame] | 153 | // NB: if you do a whole-heap invalidation, the "usual invariant" defined |
| 154 | // above no longer applies. |
Leonid Mesnik | 9a28eb0 | 2016-11-24 16:48:22 +0300 | [diff] [blame] | 155 | void invalidate(MemRegion mr); |
Y. Srinivas Ramakrishna | 18f3386 | 2008-06-05 15:57:56 -0700 | [diff] [blame] | 156 | |
| 157 | void write_region_work(MemRegion mr) { invalidate(mr); } |
| 158 | void write_ref_array_work(MemRegion mr) { invalidate(mr); } |
Y. Srinivas Ramakrishna | 18f3386 | 2008-06-05 15:57:56 -0700 | [diff] [blame] | 159 | }; |
| 160 | |
Kim Barrett | 40d3986 | 2015-02-27 19:52:48 -0500 | [diff] [blame] | 161 | template<> |
| 162 | struct BarrierSet::GetName<G1SATBCardTableLoggingModRefBS> { |
| 163 | static const BarrierSet::Name value = BarrierSet::G1SATBCTLogging; |
| 164 | }; |
| 165 | |
Per Lidén | 4dc240f | 2015-05-13 15:16:06 +0200 | [diff] [blame] | 166 | #endif // SHARE_VM_GC_G1_G1SATBCARDTABLEMODREFBS_HPP |