1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
|
/*
* Copyright (c) 2001, 2007, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*
*/
#include "incls/_precompiled.incl"
#include "incls/_g1SATBCardTableModRefBS.cpp.incl"
G1SATBCardTableModRefBS::G1SATBCardTableModRefBS(MemRegion whole_heap,
int max_covered_regions) :
CardTableModRefBSForCTRS(whole_heap, max_covered_regions)
{
_kind = G1SATBCT;
}
void G1SATBCardTableModRefBS::enqueue(oop pre_val) {
assert(pre_val->is_oop_or_null(true), "Error");
if (!JavaThread::satb_mark_queue_set().is_active()) return;
Thread* thr = Thread::current();
if (thr->is_Java_thread()) {
JavaThread* jt = (JavaThread*)thr;
jt->satb_mark_queue().enqueue(pre_val);
} else {
MutexLocker x(Shared_SATB_Q_lock);
JavaThread::satb_mark_queue_set().shared_satb_queue()->enqueue(pre_val);
}
}
// When we know the current java thread:
template <class T> void
G1SATBCardTableModRefBS::write_ref_field_pre_static(T* field,
oop new_val,
JavaThread* jt) {
if (!JavaThread::satb_mark_queue_set().is_active()) return;
T heap_oop = oopDesc::load_heap_oop(field);
if (!oopDesc::is_null(heap_oop)) {
oop pre_val = oopDesc::decode_heap_oop_not_null(heap_oop);
assert(pre_val->is_oop(true /* ignore mark word */), "Error");
jt->satb_mark_queue().enqueue(pre_val);
}
}
template <class T> void
G1SATBCardTableModRefBS::write_ref_array_pre_work(T* dst, int count) {
if (!JavaThread::satb_mark_queue_set().is_active()) return;
T* elem_ptr = dst;
for (int i = 0; i < count; i++, elem_ptr++) {
T heap_oop = oopDesc::load_heap_oop(elem_ptr);
if (!oopDesc::is_null(heap_oop)) {
enqueue(oopDesc::decode_heap_oop_not_null(heap_oop));
}
}
}
G1SATBCardTableLoggingModRefBS::
G1SATBCardTableLoggingModRefBS(MemRegion whole_heap,
int max_covered_regions) :
G1SATBCardTableModRefBS(whole_heap, max_covered_regions),
_dcqs(JavaThread::dirty_card_queue_set())
{
_kind = G1SATBCTLogging;
}
void
G1SATBCardTableLoggingModRefBS::write_ref_field_work(void* field,
oop new_val) {
jbyte* byte = byte_for(field);
if (*byte != dirty_card) {
*byte = dirty_card;
Thread* thr = Thread::current();
if (thr->is_Java_thread()) {
JavaThread* jt = (JavaThread*)thr;
jt->dirty_card_queue().enqueue(byte);
} else {
MutexLockerEx x(Shared_DirtyCardQ_lock,
Mutex::_no_safepoint_check_flag);
_dcqs.shared_dirty_card_queue()->enqueue(byte);
}
}
}
void
G1SATBCardTableLoggingModRefBS::write_ref_field_static(void* field,
oop new_val) {
uintptr_t field_uint = (uintptr_t)field;
uintptr_t new_val_uint = (uintptr_t)new_val;
uintptr_t comb = field_uint ^ new_val_uint;
comb = comb >> HeapRegion::LogOfHRGrainBytes;
if (comb == 0) return;
if (new_val == NULL) return;
// Otherwise, log it.
G1SATBCardTableLoggingModRefBS* g1_bs =
(G1SATBCardTableLoggingModRefBS*)Universe::heap()->barrier_set();
g1_bs->write_ref_field_work(field, new_val);
}
void
G1SATBCardTableLoggingModRefBS::invalidate(MemRegion mr, bool whole_heap) {
jbyte* byte = byte_for(mr.start());
jbyte* last_byte = byte_for(mr.last());
Thread* thr = Thread::current();
if (whole_heap) {
while (byte <= last_byte) {
*byte = dirty_card;
byte++;
}
} else {
// Enqueue if necessary.
if (thr->is_Java_thread()) {
JavaThread* jt = (JavaThread*)thr;
while (byte <= last_byte) {
if (*byte != dirty_card) {
*byte = dirty_card;
jt->dirty_card_queue().enqueue(byte);
}
byte++;
}
} else {
MutexLockerEx x(Shared_DirtyCardQ_lock,
Mutex::_no_safepoint_check_flag);
while (byte <= last_byte) {
if (*byte != dirty_card) {
*byte = dirty_card;
_dcqs.shared_dirty_card_queue()->enqueue(byte);
}
byte++;
}
}
}
}
|
