1 /*
2 * Copyright (c) 2001, 2008, 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 // Methods of protected closure types
26
27 template <class T>
28 inline void DefNewGeneration::KeepAliveClosure::do_oop_work(T* p) {
29 #ifdef ASSERT
30 {
31 // We never expect to see a null reference being processed
32 // as a weak reference.
33 assert (!oopDesc::is_null(*p), "expected non-null ref");
34 oop obj = oopDesc::load_decode_heap_oop_not_null(p);
35 assert (obj->is_oop(), "expected an oop while scanning weak refs");
36 }
37 #endif // ASSERT
38
39 _cl->do_oop_nv(p);
40
41 // Card marking is trickier for weak refs.
42 // This oop is a 'next' field which was filled in while we
43 // were discovering weak references. While we might not need
44 // to take a special action to keep this reference alive, we
62 #ifdef ASSERT
63 {
64 // We never expect to see a null reference being processed
65 // as a weak reference.
66 assert (!oopDesc::is_null(*p), "expected non-null ref");
67 oop obj = oopDesc::load_decode_heap_oop_not_null(p);
68 assert (obj->is_oop(), "expected an oop while scanning weak refs");
69 }
70 #endif // ASSERT
71
72 _cl->do_oop_nv(p);
73
74 // Optimized for Defnew generation if it's the youngest generation:
75 // we set a younger_gen card if we have an older->youngest
76 // generation pointer.
77 oop obj = oopDesc::load_decode_heap_oop_not_null(p);
78 if (((HeapWord*)obj < _boundary) && Universe::heap()->is_in_reserved(p)) {
79 _rs->inline_write_ref_field_gc(p, obj);
80 }
81 }
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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_MEMORY_DEFNEWGENERATION_INLINE_HPP
26 #define SHARE_VM_MEMORY_DEFNEWGENERATION_INLINE_HPP
27
28 #include "memory/cardTableRS.hpp"
29 #include "memory/defNewGeneration.hpp"
30 #include "memory/space.hpp"
31
32 // Methods of protected closure types
33
34 template <class T>
35 inline void DefNewGeneration::KeepAliveClosure::do_oop_work(T* p) {
36 #ifdef ASSERT
37 {
38 // We never expect to see a null reference being processed
39 // as a weak reference.
40 assert (!oopDesc::is_null(*p), "expected non-null ref");
41 oop obj = oopDesc::load_decode_heap_oop_not_null(p);
42 assert (obj->is_oop(), "expected an oop while scanning weak refs");
43 }
44 #endif // ASSERT
45
46 _cl->do_oop_nv(p);
47
48 // Card marking is trickier for weak refs.
49 // This oop is a 'next' field which was filled in while we
50 // were discovering weak references. While we might not need
51 // to take a special action to keep this reference alive, we
69 #ifdef ASSERT
70 {
71 // We never expect to see a null reference being processed
72 // as a weak reference.
73 assert (!oopDesc::is_null(*p), "expected non-null ref");
74 oop obj = oopDesc::load_decode_heap_oop_not_null(p);
75 assert (obj->is_oop(), "expected an oop while scanning weak refs");
76 }
77 #endif // ASSERT
78
79 _cl->do_oop_nv(p);
80
81 // Optimized for Defnew generation if it's the youngest generation:
82 // we set a younger_gen card if we have an older->youngest
83 // generation pointer.
84 oop obj = oopDesc::load_decode_heap_oop_not_null(p);
85 if (((HeapWord*)obj < _boundary) && Universe::heap()->is_in_reserved(p)) {
86 _rs->inline_write_ref_field_gc(p, obj);
87 }
88 }
89
90 #endif // SHARE_VM_MEMORY_DEFNEWGENERATION_INLINE_HPP
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