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annotate src/share/vm/oops/oop.pcgc.inline.hpp @ 2137:ffd725ff6943
Merge
author | johnc |
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date | Thu, 13 Jan 2011 17:19:21 -0800 |
parents | 3cd116fd11be |
children | e5383553fd4e |
rev | line source |
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0 | 1 /* |
1972 | 2 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. |
0 | 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). | |
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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 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #ifndef SHARE_VM_OOPS_OOP_PCGC_INLINE_HPP |
26 #define SHARE_VM_OOPS_OOP_PCGC_INLINE_HPP | |
27 | |
28 #ifndef SERIALGC | |
29 #include "gc_implementation/parNew/parNewGeneration.hpp" | |
30 #include "gc_implementation/parallelScavenge/parallelScavengeHeap.hpp" | |
31 #include "gc_implementation/parallelScavenge/psCompactionManager.hpp" | |
32 #include "gc_implementation/parallelScavenge/psParallelCompact.hpp" | |
33 #include "gc_implementation/parallelScavenge/psScavenge.hpp" | |
34 #include "gc_implementation/parallelScavenge/psScavenge.inline.hpp" | |
35 #endif | |
36 | |
0 | 37 inline void oopDesc::update_contents(ParCompactionManager* cm) { |
38 // The klass field must be updated before anything else | |
39 // can be done. | |
40 DEBUG_ONLY(klassOopDesc* original_klass = klass()); | |
41 | |
42 // Can the option to update and/or copy be moved up in the | |
43 // call chain to avoid calling into here? | |
44 | |
45 if (PSParallelCompact::should_update_klass(klass())) { | |
46 update_header(); | |
47 assert(klass()->is_klass(), "Not updated correctly"); | |
48 } else { | |
49 assert(klass()->is_klass(), "Not updated"); | |
50 } | |
51 | |
52 Klass* new_klass = blueprint(); | |
53 if (!new_klass->oop_is_typeArray()) { | |
54 // It might contain oops beyond the header, so take the virtual call. | |
55 new_klass->oop_update_pointers(cm, this); | |
56 } | |
57 // Else skip it. The typeArrayKlass in the header never needs scavenging. | |
58 } | |
59 | |
60 inline void oopDesc::update_contents(ParCompactionManager* cm, | |
61 HeapWord* begin_limit, | |
62 HeapWord* end_limit) { | |
63 // The klass field must be updated before anything else | |
64 // can be done. | |
65 debug_only(klassOopDesc* original_klass = klass()); | |
66 | |
67 update_contents(cm, klass(), begin_limit, end_limit); | |
68 } | |
69 | |
70 inline void oopDesc::update_contents(ParCompactionManager* cm, | |
71 klassOop old_klass, | |
72 HeapWord* begin_limit, | |
73 HeapWord* end_limit) { | |
74 | |
75 klassOop updated_klass = | |
76 PSParallelCompact::summary_data().calc_new_klass(old_klass); | |
77 | |
78 // Needs to be boundary aware for the 64 bit case | |
79 // update_header(); | |
80 // The klass has moved. Is the location of the klass | |
81 // within the limits? | |
113
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82 if ((((HeapWord*)&_metadata._klass) >= begin_limit) && |
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83 (((HeapWord*)&_metadata._klass) < end_limit)) { |
0 | 84 set_klass(updated_klass); |
85 } | |
86 | |
87 Klass* klass = updated_klass->klass_part(); | |
88 if (!klass->oop_is_typeArray()) { | |
89 // It might contain oops beyond the header, so take the virtual call. | |
90 klass->oop_update_pointers(cm, this, begin_limit, end_limit); | |
91 } | |
92 // Else skip it. The typeArrayKlass in the header never needs scavenging. | |
93 } | |
94 | |
95 inline void oopDesc::follow_contents(ParCompactionManager* cm) { | |
96 assert (PSParallelCompact::mark_bitmap()->is_marked(this), | |
97 "should be marked"); | |
98 blueprint()->oop_follow_contents(cm, this); | |
99 } | |
100 | |
101 // Used by parallel old GC. | |
102 | |
103 inline void oopDesc::follow_header(ParCompactionManager* cm) { | |
113
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104 if (UseCompressedOops) { |
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105 PSParallelCompact::mark_and_push(cm, compressed_klass_addr()); |
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106 } else { |
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107 PSParallelCompact::mark_and_push(cm, klass_addr()); |
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108 } |
0 | 109 } |
110 | |
111 inline oop oopDesc::forward_to_atomic(oop p) { | |
112 assert(ParNewGeneration::is_legal_forward_ptr(p), | |
113 "illegal forwarding pointer value."); | |
114 markOop oldMark = mark(); | |
115 markOop forwardPtrMark = markOopDesc::encode_pointer_as_mark(p); | |
116 markOop curMark; | |
117 | |
118 assert(forwardPtrMark->decode_pointer() == p, "encoding must be reversable"); | |
119 assert(sizeof(markOop) == sizeof(intptr_t), "CAS below requires this."); | |
120 | |
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121 while (!oldMark->is_marked()) { |
0 | 122 curMark = (markOop)Atomic::cmpxchg_ptr(forwardPtrMark, &_mark, oldMark); |
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123 assert(is_forwarded(), "object should have been forwarded"); |
0 | 124 if (curMark == oldMark) { |
125 return NULL; | |
126 } | |
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127 // If the CAS was unsuccessful then curMark->is_marked() |
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128 // should return true as another thread has CAS'd in another |
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129 // forwarding pointer. |
0 | 130 oldMark = curMark; |
131 } | |
132 return forwardee(); | |
133 } | |
134 | |
135 inline void oopDesc::update_header() { | |
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136 if (UseCompressedOops) { |
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137 PSParallelCompact::adjust_pointer(compressed_klass_addr()); |
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138 } else { |
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139 PSParallelCompact::adjust_pointer(klass_addr()); |
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140 } |
0 | 141 } |
142 | |
143 inline void oopDesc::update_header(HeapWord* beg_addr, HeapWord* end_addr) { | |
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144 if (UseCompressedOops) { |
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145 PSParallelCompact::adjust_pointer(compressed_klass_addr(), |
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146 beg_addr, end_addr); |
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147 } else { |
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148 PSParallelCompact::adjust_pointer(klass_addr(), beg_addr, end_addr); |
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149 } |
0 | 150 } |
1972 | 151 |
152 #endif // SHARE_VM_OOPS_OOP_PCGC_INLINE_HPP |