1 /*
2 * Copyright (c) 2001, 2014, Oracle and/or its affiliates. All rights reserved.
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 *
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.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "gc_implementation/g1/g1CollectedHeap.inline.hpp"
27 #include "gc_implementation/g1/g1SATBCardTableModRefBS.hpp"
28 #include "gc_implementation/g1/heapRegion.hpp"
29 #include "gc_implementation/g1/satbQueue.hpp"
30 #include "runtime/atomic.inline.hpp"
31 #include "runtime/mutexLocker.hpp"
32 #include "runtime/orderAccess.inline.hpp"
33 #include "runtime/thread.inline.hpp"
34
35 G1SATBCardTableModRefBS::G1SATBCardTableModRefBS(MemRegion whole_heap) :
36 CardTableModRefBS(whole_heap)
37 {
38 _kind = G1SATBCT;
39 }
40
41 void G1SATBCardTableModRefBS::enqueue(oop pre_val) {
42 // Nulls should have been already filtered.
43 assert(pre_val->is_oop(true), "Error");
44
45 if (!JavaThread::satb_mark_queue_set().is_active()) return;
46 Thread* thr = Thread::current();
47 if (thr->is_Java_thread()) {
48 JavaThread* jt = (JavaThread*)thr;
49 jt->satb_mark_queue().enqueue(pre_val);
50 } else {
51 MutexLockerEx x(Shared_SATB_Q_lock, Mutex::_no_safepoint_check_flag);
52 JavaThread::satb_mark_queue_set().shared_satb_queue()->enqueue(pre_val);
53 }
54 }
55
56 template <class T> void
57 G1SATBCardTableModRefBS::write_ref_array_pre_work(T* dst, int count) {
58 if (!JavaThread::satb_mark_queue_set().is_active()) return;
59 T* elem_ptr = dst;
115 for (jbyte* i = first; i < last; i++) {
116 *i = g1_young_gen;
117 }
118 }
119 }
120
121 #ifndef PRODUCT
122 void G1SATBCardTableModRefBS::verify_g1_young_region(MemRegion mr) {
123 verify_region(mr, g1_young_gen, true);
124 }
125 #endif
126
127 void G1SATBCardTableLoggingModRefBSChangedListener::on_commit(uint start_idx, size_t num_regions, bool zero_filled) {
128 // Default value for a clean card on the card table is -1. So we cannot take advantage of the zero_filled parameter.
129 MemRegion mr(G1CollectedHeap::heap()->bottom_addr_for_region(start_idx), num_regions * HeapRegion::GrainWords);
130 _card_table->clear(mr);
131 }
132
133 G1SATBCardTableLoggingModRefBS::
134 G1SATBCardTableLoggingModRefBS(MemRegion whole_heap) :
135 G1SATBCardTableModRefBS(whole_heap),
136 _dcqs(JavaThread::dirty_card_queue_set()),
137 _listener()
138 {
139 _kind = G1SATBCTLogging;
140 _listener.set_card_table(this);
141 }
142
143 void G1SATBCardTableLoggingModRefBS::initialize(G1RegionToSpaceMapper* mapper) {
144 mapper->set_mapping_changed_listener(&_listener);
145
146 _byte_map_size = mapper->reserved().byte_size();
147
148 _guard_index = cards_required(_whole_heap.word_size()) - 1;
149 _last_valid_index = _guard_index - 1;
150
151 HeapWord* low_bound = _whole_heap.start();
152 HeapWord* high_bound = _whole_heap.end();
153
154 _cur_covered_regions = 1;
155 _covered[0] = _whole_heap;
156
157 _byte_map = (jbyte*) mapper->reserved().start();
158 byte_map_base = _byte_map - (uintptr_t(low_bound) >> card_shift);
159 assert(byte_for(low_bound) == &_byte_map[0], "Checking start of map");
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1 /*
2 * Copyright (c) 2001, 2015, Oracle and/or its affiliates. All rights reserved.
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 *
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.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "gc_implementation/g1/g1CollectedHeap.inline.hpp"
27 #include "gc_implementation/g1/g1SATBCardTableModRefBS.hpp"
28 #include "gc_implementation/g1/heapRegion.hpp"
29 #include "gc_implementation/g1/satbQueue.hpp"
30 #include "runtime/atomic.inline.hpp"
31 #include "runtime/mutexLocker.hpp"
32 #include "runtime/orderAccess.inline.hpp"
33 #include "runtime/thread.inline.hpp"
34
35 G1SATBCardTableModRefBS::G1SATBCardTableModRefBS(MemRegion whole_heap, BarrierSet::Name kind) :
36 CardTableModRefBS(whole_heap, kind) { }
37
38 void G1SATBCardTableModRefBS::enqueue(oop pre_val) {
39 // Nulls should have been already filtered.
40 assert(pre_val->is_oop(true), "Error");
41
42 if (!JavaThread::satb_mark_queue_set().is_active()) return;
43 Thread* thr = Thread::current();
44 if (thr->is_Java_thread()) {
45 JavaThread* jt = (JavaThread*)thr;
46 jt->satb_mark_queue().enqueue(pre_val);
47 } else {
48 MutexLockerEx x(Shared_SATB_Q_lock, Mutex::_no_safepoint_check_flag);
49 JavaThread::satb_mark_queue_set().shared_satb_queue()->enqueue(pre_val);
50 }
51 }
52
53 template <class T> void
54 G1SATBCardTableModRefBS::write_ref_array_pre_work(T* dst, int count) {
55 if (!JavaThread::satb_mark_queue_set().is_active()) return;
56 T* elem_ptr = dst;
112 for (jbyte* i = first; i < last; i++) {
113 *i = g1_young_gen;
114 }
115 }
116 }
117
118 #ifndef PRODUCT
119 void G1SATBCardTableModRefBS::verify_g1_young_region(MemRegion mr) {
120 verify_region(mr, g1_young_gen, true);
121 }
122 #endif
123
124 void G1SATBCardTableLoggingModRefBSChangedListener::on_commit(uint start_idx, size_t num_regions, bool zero_filled) {
125 // Default value for a clean card on the card table is -1. So we cannot take advantage of the zero_filled parameter.
126 MemRegion mr(G1CollectedHeap::heap()->bottom_addr_for_region(start_idx), num_regions * HeapRegion::GrainWords);
127 _card_table->clear(mr);
128 }
129
130 G1SATBCardTableLoggingModRefBS::
131 G1SATBCardTableLoggingModRefBS(MemRegion whole_heap) :
132 G1SATBCardTableModRefBS(whole_heap, BarrierSet::G1SATBCTLogging),
133 _dcqs(JavaThread::dirty_card_queue_set()),
134 _listener()
135 {
136 _listener.set_card_table(this);
137 }
138
139 void G1SATBCardTableLoggingModRefBS::initialize(G1RegionToSpaceMapper* mapper) {
140 mapper->set_mapping_changed_listener(&_listener);
141
142 _byte_map_size = mapper->reserved().byte_size();
143
144 _guard_index = cards_required(_whole_heap.word_size()) - 1;
145 _last_valid_index = _guard_index - 1;
146
147 HeapWord* low_bound = _whole_heap.start();
148 HeapWord* high_bound = _whole_heap.end();
149
150 _cur_covered_regions = 1;
151 _covered[0] = _whole_heap;
152
153 _byte_map = (jbyte*) mapper->reserved().start();
154 byte_map_base = _byte_map - (uintptr_t(low_bound) >> card_shift);
155 assert(byte_for(low_bound) == &_byte_map[0], "Checking start of map");
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