1 /*
2 * Copyright (c) 2001, 2007, 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 #ifndef SERIALGC
26
27 class DirtyCardQueueSet;
28
29 // This barrier is specialized to use a logging barrier to support
30 // snapshot-at-the-beginning marking.
31
32 class G1SATBCardTableModRefBS: public CardTableModRefBSForCTRS {
33 private:
34 // Add "pre_val" to a set of objects that may have been disconnected from the
35 // pre-marking object graph.
36 static void enqueue(oop pre_val);
37
38 public:
39 G1SATBCardTableModRefBS(MemRegion whole_heap,
40 int max_covered_regions);
41
42 bool is_a(BarrierSet::Name bsn) {
43 return bsn == BarrierSet::G1SATBCT || CardTableModRefBS::is_a(bsn);
44 }
98 G1SATBCardTableModRefBS::is_a(bsn);
99 }
100
101 void write_ref_field_work(void* field, oop new_val);
102
103 // Can be called from static contexts.
104 static void write_ref_field_static(void* field, oop new_val);
105
106 // NB: if you do a whole-heap invalidation, the "usual invariant" defined
107 // above no longer applies.
108 void invalidate(MemRegion mr, bool whole_heap = false);
109
110 void write_region_work(MemRegion mr) { invalidate(mr); }
111 void write_ref_array_work(MemRegion mr) { invalidate(mr); }
112
113
114 };
115
116
117 #endif // SERIALGC
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1 /*
2 * Copyright (c) 2001, 2010, 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 #ifndef SHARE_VM_GC_IMPLEMENTATION_G1_G1SATBCARDTABLEMODREFBS_HPP
26 #define SHARE_VM_GC_IMPLEMENTATION_G1_G1SATBCARDTABLEMODREFBS_HPP
27
28 #include "memory/cardTableModRefBS.hpp"
29 #include "memory/memRegion.hpp"
30 #include "oops/oop.inline.hpp"
31
32 #ifndef SERIALGC
33
34 class DirtyCardQueueSet;
35
36 // This barrier is specialized to use a logging barrier to support
37 // snapshot-at-the-beginning marking.
38
39 class G1SATBCardTableModRefBS: public CardTableModRefBSForCTRS {
40 private:
41 // Add "pre_val" to a set of objects that may have been disconnected from the
42 // pre-marking object graph.
43 static void enqueue(oop pre_val);
44
45 public:
46 G1SATBCardTableModRefBS(MemRegion whole_heap,
47 int max_covered_regions);
48
49 bool is_a(BarrierSet::Name bsn) {
50 return bsn == BarrierSet::G1SATBCT || CardTableModRefBS::is_a(bsn);
51 }
105 G1SATBCardTableModRefBS::is_a(bsn);
106 }
107
108 void write_ref_field_work(void* field, oop new_val);
109
110 // Can be called from static contexts.
111 static void write_ref_field_static(void* field, oop new_val);
112
113 // NB: if you do a whole-heap invalidation, the "usual invariant" defined
114 // above no longer applies.
115 void invalidate(MemRegion mr, bool whole_heap = false);
116
117 void write_region_work(MemRegion mr) { invalidate(mr); }
118 void write_ref_array_work(MemRegion mr) { invalidate(mr); }
119
120
121 };
122
123
124 #endif // SERIALGC
125
126 #endif // SHARE_VM_GC_IMPLEMENTATION_G1_G1SATBCARDTABLEMODREFBS_HPP
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