Mercurial > hg > truffle
annotate src/share/vm/gc_implementation/g1/g1SATBCardTableModRefBS.cpp @ 2432:455328d90876
7029458: G1: Add newly-reclaimed regions to the beginning of the region free list, not the end
Summary: What the synopsis says.
Reviewed-by: jwilhelm, iveresov, johnc
author | tonyp |
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date | Tue, 29 Mar 2011 22:36:16 -0400 |
parents | f95d63e2154a |
children | e1162778c1c8 |
rev | line source |
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342 | 1 /* |
1972 | 2 * Copyright (c) 2001, 2010, 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 #include "precompiled.hpp" |
26 #include "gc_implementation/g1/g1SATBCardTableModRefBS.hpp" | |
27 #include "gc_implementation/g1/heapRegion.hpp" | |
28 #include "gc_implementation/g1/satbQueue.hpp" | |
29 #include "runtime/mutexLocker.hpp" | |
30 #include "runtime/thread.hpp" | |
31 #ifdef TARGET_OS_FAMILY_linux | |
32 # include "thread_linux.inline.hpp" | |
33 #endif | |
34 #ifdef TARGET_OS_FAMILY_solaris | |
35 # include "thread_solaris.inline.hpp" | |
36 #endif | |
37 #ifdef TARGET_OS_FAMILY_windows | |
38 # include "thread_windows.inline.hpp" | |
39 #endif | |
342 | 40 |
41 G1SATBCardTableModRefBS::G1SATBCardTableModRefBS(MemRegion whole_heap, | |
42 int max_covered_regions) : | |
43 CardTableModRefBSForCTRS(whole_heap, max_covered_regions) | |
44 { | |
45 _kind = G1SATBCT; | |
46 } | |
47 | |
48 | |
49 void G1SATBCardTableModRefBS::enqueue(oop pre_val) { | |
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50 assert(pre_val->is_oop_or_null(true), "Error"); |
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51 if (!JavaThread::satb_mark_queue_set().is_active()) return; |
342 | 52 Thread* thr = Thread::current(); |
53 if (thr->is_Java_thread()) { | |
54 JavaThread* jt = (JavaThread*)thr; | |
55 jt->satb_mark_queue().enqueue(pre_val); | |
56 } else { | |
57 MutexLocker x(Shared_SATB_Q_lock); | |
58 JavaThread::satb_mark_queue_set().shared_satb_queue()->enqueue(pre_val); | |
59 } | |
60 } | |
61 | |
62 // When we know the current java thread: | |
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63 template <class T> void |
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64 G1SATBCardTableModRefBS::write_ref_field_pre_static(T* field, |
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65 oop new_val, |
342 | 66 JavaThread* jt) { |
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67 if (!JavaThread::satb_mark_queue_set().is_active()) return; |
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68 T heap_oop = oopDesc::load_heap_oop(field); |
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69 if (!oopDesc::is_null(heap_oop)) { |
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70 oop pre_val = oopDesc::decode_heap_oop_not_null(heap_oop); |
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71 assert(pre_val->is_oop(true /* ignore mark word */), "Error"); |
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72 jt->satb_mark_queue().enqueue(pre_val); |
342 | 73 } |
74 } | |
75 | |
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76 template <class T> void |
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77 G1SATBCardTableModRefBS::write_ref_array_pre_work(T* dst, int count) { |
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78 if (!JavaThread::satb_mark_queue_set().is_active()) return; |
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79 T* elem_ptr = dst; |
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80 for (int i = 0; i < count; i++, elem_ptr++) { |
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81 T heap_oop = oopDesc::load_heap_oop(elem_ptr); |
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82 if (!oopDesc::is_null(heap_oop)) { |
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83 enqueue(oopDesc::decode_heap_oop_not_null(heap_oop)); |
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84 } |
342 | 85 } |
86 } | |
87 | |
88 G1SATBCardTableLoggingModRefBS:: | |
89 G1SATBCardTableLoggingModRefBS(MemRegion whole_heap, | |
90 int max_covered_regions) : | |
91 G1SATBCardTableModRefBS(whole_heap, max_covered_regions), | |
92 _dcqs(JavaThread::dirty_card_queue_set()) | |
93 { | |
94 _kind = G1SATBCTLogging; | |
95 } | |
96 | |
97 void | |
98 G1SATBCardTableLoggingModRefBS::write_ref_field_work(void* field, | |
99 oop new_val) { | |
100 jbyte* byte = byte_for(field); | |
101 if (*byte != dirty_card) { | |
102 *byte = dirty_card; | |
103 Thread* thr = Thread::current(); | |
104 if (thr->is_Java_thread()) { | |
105 JavaThread* jt = (JavaThread*)thr; | |
106 jt->dirty_card_queue().enqueue(byte); | |
107 } else { | |
108 MutexLockerEx x(Shared_DirtyCardQ_lock, | |
109 Mutex::_no_safepoint_check_flag); | |
110 _dcqs.shared_dirty_card_queue()->enqueue(byte); | |
111 } | |
112 } | |
113 } | |
114 | |
115 void | |
116 G1SATBCardTableLoggingModRefBS::write_ref_field_static(void* field, | |
117 oop new_val) { | |
118 uintptr_t field_uint = (uintptr_t)field; | |
119 uintptr_t new_val_uint = (uintptr_t)new_val; | |
120 uintptr_t comb = field_uint ^ new_val_uint; | |
121 comb = comb >> HeapRegion::LogOfHRGrainBytes; | |
122 if (comb == 0) return; | |
123 if (new_val == NULL) return; | |
124 // Otherwise, log it. | |
125 G1SATBCardTableLoggingModRefBS* g1_bs = | |
126 (G1SATBCardTableLoggingModRefBS*)Universe::heap()->barrier_set(); | |
127 g1_bs->write_ref_field_work(field, new_val); | |
128 } | |
129 | |
130 void | |
131 G1SATBCardTableLoggingModRefBS::invalidate(MemRegion mr, bool whole_heap) { | |
132 jbyte* byte = byte_for(mr.start()); | |
133 jbyte* last_byte = byte_for(mr.last()); | |
134 Thread* thr = Thread::current(); | |
135 if (whole_heap) { | |
136 while (byte <= last_byte) { | |
137 *byte = dirty_card; | |
138 byte++; | |
139 } | |
140 } else { | |
141 // Enqueue if necessary. | |
142 if (thr->is_Java_thread()) { | |
143 JavaThread* jt = (JavaThread*)thr; | |
144 while (byte <= last_byte) { | |
145 if (*byte != dirty_card) { | |
146 *byte = dirty_card; | |
147 jt->dirty_card_queue().enqueue(byte); | |
148 } | |
149 byte++; | |
150 } | |
151 } else { | |
152 MutexLockerEx x(Shared_DirtyCardQ_lock, | |
153 Mutex::_no_safepoint_check_flag); | |
154 while (byte <= last_byte) { | |
155 if (*byte != dirty_card) { | |
156 *byte = dirty_card; | |
157 _dcqs.shared_dirty_card_queue()->enqueue(byte); | |
158 } | |
159 byte++; | |
160 } | |
161 } | |
162 } | |
163 } |