Mercurial > hg > truffle
annotate src/share/vm/gc_implementation/g1/g1SATBCardTableModRefBS.cpp @ 10135:5a9fa2ba85f0
8012907: anti-delta fix for 8010992
Summary: anti-delta fix for 8010992 until 8012902 can be fixed
Reviewed-by: acorn, minqi, rdurbin
author | dcubed |
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date | Sun, 21 Apr 2013 20:41:04 -0700 |
parents | f34d701e952e |
children | b30744960351 |
rev | line source |
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342 | 1 /* |
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2 * Copyright (c) 2001, 2011, 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" | |
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30 #include "runtime/thread.inline.hpp" |
342 | 31 |
32 G1SATBCardTableModRefBS::G1SATBCardTableModRefBS(MemRegion whole_heap, | |
33 int max_covered_regions) : | |
34 CardTableModRefBSForCTRS(whole_heap, max_covered_regions) | |
35 { | |
36 _kind = G1SATBCT; | |
37 } | |
38 | |
39 | |
40 void G1SATBCardTableModRefBS::enqueue(oop pre_val) { | |
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41 // Nulls should have been already filtered. |
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42 assert(pre_val->is_oop(true), "Error"); |
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43 |
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44 if (!JavaThread::satb_mark_queue_set().is_active()) return; |
342 | 45 Thread* thr = Thread::current(); |
46 if (thr->is_Java_thread()) { | |
47 JavaThread* jt = (JavaThread*)thr; | |
48 jt->satb_mark_queue().enqueue(pre_val); | |
49 } else { | |
50 MutexLocker x(Shared_SATB_Q_lock); | |
51 JavaThread::satb_mark_queue_set().shared_satb_queue()->enqueue(pre_val); | |
52 } | |
53 } | |
54 | |
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55 template <class T> void |
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56 G1SATBCardTableModRefBS::write_ref_array_pre_work(T* dst, int count) { |
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57 if (!JavaThread::satb_mark_queue_set().is_active()) return; |
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58 T* elem_ptr = dst; |
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59 for (int i = 0; i < count; i++, elem_ptr++) { |
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60 T heap_oop = oopDesc::load_heap_oop(elem_ptr); |
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61 if (!oopDesc::is_null(heap_oop)) { |
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62 enqueue(oopDesc::decode_heap_oop_not_null(heap_oop)); |
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63 } |
342 | 64 } |
65 } | |
66 | |
67 G1SATBCardTableLoggingModRefBS:: | |
68 G1SATBCardTableLoggingModRefBS(MemRegion whole_heap, | |
69 int max_covered_regions) : | |
70 G1SATBCardTableModRefBS(whole_heap, max_covered_regions), | |
71 _dcqs(JavaThread::dirty_card_queue_set()) | |
72 { | |
73 _kind = G1SATBCTLogging; | |
74 } | |
75 | |
76 void | |
77 G1SATBCardTableLoggingModRefBS::write_ref_field_work(void* field, | |
78 oop new_val) { | |
79 jbyte* byte = byte_for(field); | |
80 if (*byte != dirty_card) { | |
81 *byte = dirty_card; | |
82 Thread* thr = Thread::current(); | |
83 if (thr->is_Java_thread()) { | |
84 JavaThread* jt = (JavaThread*)thr; | |
85 jt->dirty_card_queue().enqueue(byte); | |
86 } else { | |
87 MutexLockerEx x(Shared_DirtyCardQ_lock, | |
88 Mutex::_no_safepoint_check_flag); | |
89 _dcqs.shared_dirty_card_queue()->enqueue(byte); | |
90 } | |
91 } | |
92 } | |
93 | |
94 void | |
95 G1SATBCardTableLoggingModRefBS::write_ref_field_static(void* field, | |
96 oop new_val) { | |
97 uintptr_t field_uint = (uintptr_t)field; | |
98 uintptr_t new_val_uint = (uintptr_t)new_val; | |
99 uintptr_t comb = field_uint ^ new_val_uint; | |
100 comb = comb >> HeapRegion::LogOfHRGrainBytes; | |
101 if (comb == 0) return; | |
102 if (new_val == NULL) return; | |
103 // Otherwise, log it. | |
104 G1SATBCardTableLoggingModRefBS* g1_bs = | |
105 (G1SATBCardTableLoggingModRefBS*)Universe::heap()->barrier_set(); | |
106 g1_bs->write_ref_field_work(field, new_val); | |
107 } | |
108 | |
109 void | |
110 G1SATBCardTableLoggingModRefBS::invalidate(MemRegion mr, bool whole_heap) { | |
111 jbyte* byte = byte_for(mr.start()); | |
112 jbyte* last_byte = byte_for(mr.last()); | |
113 Thread* thr = Thread::current(); | |
114 if (whole_heap) { | |
115 while (byte <= last_byte) { | |
116 *byte = dirty_card; | |
117 byte++; | |
118 } | |
119 } else { | |
120 // Enqueue if necessary. | |
121 if (thr->is_Java_thread()) { | |
122 JavaThread* jt = (JavaThread*)thr; | |
123 while (byte <= last_byte) { | |
124 if (*byte != dirty_card) { | |
125 *byte = dirty_card; | |
126 jt->dirty_card_queue().enqueue(byte); | |
127 } | |
128 byte++; | |
129 } | |
130 } else { | |
131 MutexLockerEx x(Shared_DirtyCardQ_lock, | |
132 Mutex::_no_safepoint_check_flag); | |
133 while (byte <= last_byte) { | |
134 if (*byte != dirty_card) { | |
135 *byte = dirty_card; | |
136 _dcqs.shared_dirty_card_queue()->enqueue(byte); | |
137 } | |
138 byte++; | |
139 } | |
140 } | |
141 } | |
142 } |