Mercurial > hg > truffle
comparison src/share/vm/memory/genOopClosures.inline.hpp @ 0:a61af66fc99e jdk7-b24
Initial load
author | duke |
---|---|
date | Sat, 01 Dec 2007 00:00:00 +0000 |
parents | |
children | ba764ed4b6f2 |
comparison
equal
deleted
inserted
replaced
-1:000000000000 | 0:a61af66fc99e |
---|---|
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 inline OopsInGenClosure::OopsInGenClosure(Generation* gen) : | |
26 OopClosure(gen->ref_processor()), _orig_gen(gen), _rs(NULL) { | |
27 set_generation(gen); | |
28 } | |
29 | |
30 inline void OopsInGenClosure::set_generation(Generation* gen) { | |
31 _gen = gen; | |
32 _gen_boundary = _gen->reserved().start(); | |
33 // Barrier set for the heap, must be set after heap is initialized | |
34 if (_rs == NULL) { | |
35 GenRemSet* rs = SharedHeap::heap()->rem_set(); | |
36 assert(rs->rs_kind() == GenRemSet::CardTable, "Wrong rem set kind"); | |
37 _rs = (CardTableRS*)rs; | |
38 } | |
39 } | |
40 | |
41 inline void OopsInGenClosure::do_barrier(oop* p) { | |
42 assert(generation()->is_in_reserved(p), "expected ref in generation"); | |
43 oop obj = *p; | |
44 assert(obj != NULL, "expected non-null object"); | |
45 // If p points to a younger generation, mark the card. | |
46 if ((HeapWord*)obj < _gen_boundary) { | |
47 _rs->inline_write_ref_field_gc(p, obj); | |
48 } | |
49 } | |
50 | |
51 // NOTE! Any changes made here should also be made | |
52 // in FastScanClosure::do_oop(); | |
53 inline void ScanClosure::do_oop(oop* p) { | |
54 oop obj = *p; | |
55 // Should we copy the obj? | |
56 if (obj != NULL) { | |
57 if ((HeapWord*)obj < _boundary) { | |
58 assert(!_g->to()->is_in_reserved(obj), "Scanning field twice?"); | |
59 if (obj->is_forwarded()) { | |
60 *p = obj->forwardee(); | |
61 } else { | |
62 *p = _g->copy_to_survivor_space(obj, p); | |
63 } | |
64 } | |
65 if (_gc_barrier) { | |
66 // Now call parent closure | |
67 do_barrier(p); | |
68 } | |
69 } | |
70 } | |
71 | |
72 inline void ScanClosure::do_oop_nv(oop* p) { | |
73 ScanClosure::do_oop(p); | |
74 } | |
75 | |
76 // NOTE! Any changes made here should also be made | |
77 // in ScanClosure::do_oop(); | |
78 inline void FastScanClosure::do_oop(oop* p) { | |
79 oop obj = *p; | |
80 // Should we copy the obj? | |
81 if (obj != NULL) { | |
82 if ((HeapWord*)obj < _boundary) { | |
83 assert(!_g->to()->is_in_reserved(obj), "Scanning field twice?"); | |
84 if (obj->is_forwarded()) { | |
85 *p = obj->forwardee(); | |
86 } else { | |
87 *p = _g->copy_to_survivor_space(obj, p); | |
88 } | |
89 if (_gc_barrier) { | |
90 // Now call parent closure | |
91 do_barrier(p); | |
92 } | |
93 } | |
94 } | |
95 } | |
96 | |
97 inline void FastScanClosure::do_oop_nv(oop* p) { | |
98 FastScanClosure::do_oop(p); | |
99 } | |
100 | |
101 // Note similarity to ScanClosure; the difference is that | |
102 // the barrier set is taken care of outside this closure. | |
103 inline void ScanWeakRefClosure::do_oop(oop* p) { | |
104 oop obj = *p; | |
105 assert (obj != NULL, "null weak reference?"); | |
106 // weak references are sometimes scanned twice; must check | |
107 // that to-space doesn't already contain this object | |
108 if ((HeapWord*)obj < _boundary && !_g->to()->is_in_reserved(obj)) { | |
109 if (obj->is_forwarded()) { | |
110 *p = obj->forwardee(); | |
111 } else { | |
112 *p = _g->copy_to_survivor_space(obj, p); | |
113 } | |
114 } | |
115 } | |
116 | |
117 inline void ScanWeakRefClosure::do_oop_nv(oop* p) { | |
118 ScanWeakRefClosure::do_oop(p); | |
119 } |