Mercurial > hg > truffle
comparison src/share/vm/gc_implementation/g1/g1SATBCardTableModRefBS.cpp @ 342:37f87013dfd8
6711316: Open source the Garbage-First garbage collector
Summary: First mercurial integration of the code for the Garbage-First garbage collector.
Reviewed-by: apetrusenko, iveresov, jmasa, sgoldman, tonyp, ysr
author | ysr |
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date | Thu, 05 Jun 2008 15:57:56 -0700 |
parents | |
children | df6caf649ff7 |
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189:0b27f3512f9e | 342:37f87013dfd8 |
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1 /* | |
2 * Copyright 2001-2007 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
20 * CA 95054 USA or visit www.sun.com if you need additional information or | |
21 * have any questions. | |
22 * | |
23 */ | |
24 | |
25 #include "incls/_precompiled.incl" | |
26 #include "incls/_g1SATBCardTableModRefBS.cpp.incl" | |
27 | |
28 G1SATBCardTableModRefBS::G1SATBCardTableModRefBS(MemRegion whole_heap, | |
29 int max_covered_regions) : | |
30 CardTableModRefBSForCTRS(whole_heap, max_covered_regions) | |
31 { | |
32 _kind = G1SATBCT; | |
33 } | |
34 | |
35 | |
36 void G1SATBCardTableModRefBS::enqueue(oop pre_val) { | |
37 if (!JavaThread::satb_mark_queue_set().active()) return; | |
38 Thread* thr = Thread::current(); | |
39 if (thr->is_Java_thread()) { | |
40 JavaThread* jt = (JavaThread*)thr; | |
41 jt->satb_mark_queue().enqueue(pre_val); | |
42 } else { | |
43 MutexLocker x(Shared_SATB_Q_lock); | |
44 JavaThread::satb_mark_queue_set().shared_satb_queue()->enqueue(pre_val); | |
45 } | |
46 } | |
47 | |
48 // When we know the current java thread: | |
49 void | |
50 G1SATBCardTableModRefBS::write_ref_field_pre_static(void* field, | |
51 oop newVal, | |
52 JavaThread* jt) { | |
53 if (!JavaThread::satb_mark_queue_set().active()) return; | |
54 assert(!UseCompressedOops, "Else will need to modify this to deal with narrowOop"); | |
55 oop preVal = *(oop*)field; | |
56 if (preVal != NULL) { | |
57 jt->satb_mark_queue().enqueue(preVal); | |
58 } | |
59 } | |
60 | |
61 void | |
62 G1SATBCardTableModRefBS::write_ref_array_pre(MemRegion mr) { | |
63 if (!JavaThread::satb_mark_queue_set().active()) return; | |
64 assert(!UseCompressedOops, "Else will need to modify this to deal with narrowOop"); | |
65 oop* elem_ptr = (oop*)mr.start(); | |
66 while ((HeapWord*)elem_ptr < mr.end()) { | |
67 oop elem = *elem_ptr; | |
68 if (elem != NULL) enqueue(elem); | |
69 elem_ptr++; | |
70 } | |
71 } | |
72 | |
73 | |
74 | |
75 G1SATBCardTableLoggingModRefBS:: | |
76 G1SATBCardTableLoggingModRefBS(MemRegion whole_heap, | |
77 int max_covered_regions) : | |
78 G1SATBCardTableModRefBS(whole_heap, max_covered_regions), | |
79 _dcqs(JavaThread::dirty_card_queue_set()) | |
80 { | |
81 _kind = G1SATBCTLogging; | |
82 } | |
83 | |
84 void | |
85 G1SATBCardTableLoggingModRefBS::write_ref_field_work(void* field, | |
86 oop new_val) { | |
87 jbyte* byte = byte_for(field); | |
88 if (*byte != dirty_card) { | |
89 *byte = dirty_card; | |
90 Thread* thr = Thread::current(); | |
91 if (thr->is_Java_thread()) { | |
92 JavaThread* jt = (JavaThread*)thr; | |
93 jt->dirty_card_queue().enqueue(byte); | |
94 } else { | |
95 MutexLockerEx x(Shared_DirtyCardQ_lock, | |
96 Mutex::_no_safepoint_check_flag); | |
97 _dcqs.shared_dirty_card_queue()->enqueue(byte); | |
98 } | |
99 } | |
100 } | |
101 | |
102 void | |
103 G1SATBCardTableLoggingModRefBS::write_ref_field_static(void* field, | |
104 oop new_val) { | |
105 uintptr_t field_uint = (uintptr_t)field; | |
106 uintptr_t new_val_uint = (uintptr_t)new_val; | |
107 uintptr_t comb = field_uint ^ new_val_uint; | |
108 comb = comb >> HeapRegion::LogOfHRGrainBytes; | |
109 if (comb == 0) return; | |
110 if (new_val == NULL) return; | |
111 // Otherwise, log it. | |
112 G1SATBCardTableLoggingModRefBS* g1_bs = | |
113 (G1SATBCardTableLoggingModRefBS*)Universe::heap()->barrier_set(); | |
114 g1_bs->write_ref_field_work(field, new_val); | |
115 } | |
116 | |
117 void | |
118 G1SATBCardTableLoggingModRefBS::invalidate(MemRegion mr, bool whole_heap) { | |
119 jbyte* byte = byte_for(mr.start()); | |
120 jbyte* last_byte = byte_for(mr.last()); | |
121 Thread* thr = Thread::current(); | |
122 if (whole_heap) { | |
123 while (byte <= last_byte) { | |
124 *byte = dirty_card; | |
125 byte++; | |
126 } | |
127 } else { | |
128 // Enqueue if necessary. | |
129 if (thr->is_Java_thread()) { | |
130 JavaThread* jt = (JavaThread*)thr; | |
131 while (byte <= last_byte) { | |
132 if (*byte != dirty_card) { | |
133 *byte = dirty_card; | |
134 jt->dirty_card_queue().enqueue(byte); | |
135 } | |
136 byte++; | |
137 } | |
138 } else { | |
139 MutexLockerEx x(Shared_DirtyCardQ_lock, | |
140 Mutex::_no_safepoint_check_flag); | |
141 while (byte <= last_byte) { | |
142 if (*byte != dirty_card) { | |
143 *byte = dirty_card; | |
144 _dcqs.shared_dirty_card_queue()->enqueue(byte); | |
145 } | |
146 byte++; | |
147 } | |
148 } | |
149 } | |
150 } |