1 /*
2 * Copyright (c) 2001, 2015, 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 *
106 // Should we copy the obj?
107 if (!oopDesc::is_null(heap_oop)) {
108 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop);
109 if ((HeapWord*)obj < _boundary) {
110 assert(!_g->to()->is_in_reserved(obj), "Scanning field twice?");
111 oop new_obj = obj->is_forwarded() ? obj->forwardee()
112 : _g->copy_to_survivor_space(obj);
113 oopDesc::encode_store_heap_oop_not_null(p, new_obj);
114 if (is_scanning_a_klass()) {
115 do_klass_barrier();
116 } else if (_gc_barrier) {
117 // Now call parent closure
118 do_barrier(p);
119 }
120 }
121 }
122 }
123
124 inline void FastScanClosure::do_oop_nv(oop* p) { FastScanClosure::do_oop_work(p); }
125 inline void FastScanClosure::do_oop_nv(narrowOop* p) { FastScanClosure::do_oop_work(p); }
126
127 // Note similarity to ScanClosure; the difference is that
128 // the barrier set is taken care of outside this closure.
129 template <class T> inline void ScanWeakRefClosure::do_oop_work(T* p) {
130 assert(!oopDesc::is_null(*p), "null weak reference?");
131 oop obj = oopDesc::load_decode_heap_oop_not_null(p);
132 // weak references are sometimes scanned twice; must check
133 // that to-space doesn't already contain this object
134 if ((HeapWord*)obj < _boundary && !_g->to()->is_in_reserved(obj)) {
135 oop new_obj = obj->is_forwarded() ? obj->forwardee()
136 : _g->copy_to_survivor_space(obj);
137 oopDesc::encode_store_heap_oop_not_null(p, new_obj);
138 }
139 }
140
141 inline void ScanWeakRefClosure::do_oop_nv(oop* p) { ScanWeakRefClosure::do_oop_work(p); }
142 inline void ScanWeakRefClosure::do_oop_nv(narrowOop* p) { ScanWeakRefClosure::do_oop_work(p); }
143
144 #endif // SHARE_VM_GC_SHARED_GENOOPCLOSURES_INLINE_HPP
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1 /*
2 * Copyright (c) 2001, 2016, 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 *
106 // Should we copy the obj?
107 if (!oopDesc::is_null(heap_oop)) {
108 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop);
109 if ((HeapWord*)obj < _boundary) {
110 assert(!_g->to()->is_in_reserved(obj), "Scanning field twice?");
111 oop new_obj = obj->is_forwarded() ? obj->forwardee()
112 : _g->copy_to_survivor_space(obj);
113 oopDesc::encode_store_heap_oop_not_null(p, new_obj);
114 if (is_scanning_a_klass()) {
115 do_klass_barrier();
116 } else if (_gc_barrier) {
117 // Now call parent closure
118 do_barrier(p);
119 }
120 }
121 }
122 }
123
124 inline void FastScanClosure::do_oop_nv(oop* p) { FastScanClosure::do_oop_work(p); }
125 inline void FastScanClosure::do_oop_nv(narrowOop* p) { FastScanClosure::do_oop_work(p); }
126
127 template <class T> void FilteringClosure::do_oop_work(T* p) {
128 T heap_oop = oopDesc::load_heap_oop(p);
129 if (!oopDesc::is_null(heap_oop)) {
130 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop);
131 if ((HeapWord*)obj < _boundary) {
132 _cl->do_oop(p);
133 }
134 }
135 }
136
137 void FilteringClosure::do_oop_nv(oop* p) { FilteringClosure::do_oop_work(p); }
138 void FilteringClosure::do_oop_nv(narrowOop* p) { FilteringClosure::do_oop_work(p); }
139
140 // Note similarity to ScanClosure; the difference is that
141 // the barrier set is taken care of outside this closure.
142 template <class T> inline void ScanWeakRefClosure::do_oop_work(T* p) {
143 assert(!oopDesc::is_null(*p), "null weak reference?");
144 oop obj = oopDesc::load_decode_heap_oop_not_null(p);
145 // weak references are sometimes scanned twice; must check
146 // that to-space doesn't already contain this object
147 if ((HeapWord*)obj < _boundary && !_g->to()->is_in_reserved(obj)) {
148 oop new_obj = obj->is_forwarded() ? obj->forwardee()
149 : _g->copy_to_survivor_space(obj);
150 oopDesc::encode_store_heap_oop_not_null(p, new_obj);
151 }
152 }
153
154 inline void ScanWeakRefClosure::do_oop_nv(oop* p) { ScanWeakRefClosure::do_oop_work(p); }
155 inline void ScanWeakRefClosure::do_oop_nv(narrowOop* p) { ScanWeakRefClosure::do_oop_work(p); }
156
157 #endif // SHARE_VM_GC_SHARED_GENOOPCLOSURES_INLINE_HPP
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