Mercurial > hg > truffle
annotate src/share/vm/oops/oop.pcgc.inline.hpp @ 1078:8e7adf982378
6896043: first round of zero fixes
Reviewed-by: kvn
Contributed-by: Gary Benson <gbenson@redhat.com>
author | twisti |
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date | Fri, 27 Nov 2009 07:56:58 -0800 |
parents | d1605aabd0a1 |
children | c18cbe5936b8 |
rev | line source |
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0 | 1 /* |
196 | 2 * Copyright 2005-2008 Sun Microsystems, Inc. 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). | |
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 void oopDesc::update_contents(ParCompactionManager* cm) { | |
26 // The klass field must be updated before anything else | |
27 // can be done. | |
28 DEBUG_ONLY(klassOopDesc* original_klass = klass()); | |
29 | |
30 // Can the option to update and/or copy be moved up in the | |
31 // call chain to avoid calling into here? | |
32 | |
33 if (PSParallelCompact::should_update_klass(klass())) { | |
34 update_header(); | |
35 assert(klass()->is_klass(), "Not updated correctly"); | |
36 } else { | |
37 assert(klass()->is_klass(), "Not updated"); | |
38 } | |
39 | |
40 Klass* new_klass = blueprint(); | |
41 if (!new_klass->oop_is_typeArray()) { | |
42 // It might contain oops beyond the header, so take the virtual call. | |
43 new_klass->oop_update_pointers(cm, this); | |
44 } | |
45 // Else skip it. The typeArrayKlass in the header never needs scavenging. | |
46 } | |
47 | |
48 inline void oopDesc::update_contents(ParCompactionManager* cm, | |
49 HeapWord* begin_limit, | |
50 HeapWord* end_limit) { | |
51 // The klass field must be updated before anything else | |
52 // can be done. | |
53 debug_only(klassOopDesc* original_klass = klass()); | |
54 | |
55 update_contents(cm, klass(), begin_limit, end_limit); | |
56 } | |
57 | |
58 inline void oopDesc::update_contents(ParCompactionManager* cm, | |
59 klassOop old_klass, | |
60 HeapWord* begin_limit, | |
61 HeapWord* end_limit) { | |
62 | |
63 klassOop updated_klass = | |
64 PSParallelCompact::summary_data().calc_new_klass(old_klass); | |
65 | |
66 // Needs to be boundary aware for the 64 bit case | |
67 // update_header(); | |
68 // The klass has moved. Is the location of the klass | |
69 // within the limits? | |
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70 if ((((HeapWord*)&_metadata._klass) >= begin_limit) && |
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71 (((HeapWord*)&_metadata._klass) < end_limit)) { |
0 | 72 set_klass(updated_klass); |
73 } | |
74 | |
75 Klass* klass = updated_klass->klass_part(); | |
76 if (!klass->oop_is_typeArray()) { | |
77 // It might contain oops beyond the header, so take the virtual call. | |
78 klass->oop_update_pointers(cm, this, begin_limit, end_limit); | |
79 } | |
80 // Else skip it. The typeArrayKlass in the header never needs scavenging. | |
81 } | |
82 | |
83 inline void oopDesc::follow_contents(ParCompactionManager* cm) { | |
84 assert (PSParallelCompact::mark_bitmap()->is_marked(this), | |
85 "should be marked"); | |
86 blueprint()->oop_follow_contents(cm, this); | |
87 } | |
88 | |
89 // Used by parallel old GC. | |
90 | |
91 inline void oopDesc::follow_header(ParCompactionManager* cm) { | |
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92 if (UseCompressedOops) { |
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93 PSParallelCompact::mark_and_push(cm, compressed_klass_addr()); |
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94 } else { |
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95 PSParallelCompact::mark_and_push(cm, klass_addr()); |
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96 } |
0 | 97 } |
98 | |
99 inline oop oopDesc::forward_to_atomic(oop p) { | |
100 assert(ParNewGeneration::is_legal_forward_ptr(p), | |
101 "illegal forwarding pointer value."); | |
102 markOop oldMark = mark(); | |
103 markOop forwardPtrMark = markOopDesc::encode_pointer_as_mark(p); | |
104 markOop curMark; | |
105 | |
106 assert(forwardPtrMark->decode_pointer() == p, "encoding must be reversable"); | |
107 assert(sizeof(markOop) == sizeof(intptr_t), "CAS below requires this."); | |
108 | |
109 while (!is_forwarded()) { | |
110 curMark = (markOop)Atomic::cmpxchg_ptr(forwardPtrMark, &_mark, oldMark); | |
111 if (curMark == oldMark) { | |
112 assert(is_forwarded(), "the CAS should have succeeded."); | |
113 return NULL; | |
114 } | |
115 oldMark = curMark; | |
116 } | |
117 return forwardee(); | |
118 } | |
119 | |
120 inline void oopDesc::update_header() { | |
113
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121 if (UseCompressedOops) { |
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122 PSParallelCompact::adjust_pointer(compressed_klass_addr()); |
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123 } else { |
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124 PSParallelCompact::adjust_pointer(klass_addr()); |
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125 } |
0 | 126 } |
127 | |
128 inline void oopDesc::update_header(HeapWord* beg_addr, HeapWord* end_addr) { | |
113
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129 if (UseCompressedOops) { |
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130 PSParallelCompact::adjust_pointer(compressed_klass_addr(), |
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131 beg_addr, end_addr); |
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132 } else { |
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133 PSParallelCompact::adjust_pointer(klass_addr(), beg_addr, end_addr); |
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134 } |
0 | 135 } |