Mercurial > hg > truffle
annotate src/share/vm/oops/oop.pcgc.inline.hpp @ 4181:319860ae697a
Simplify FrameMap: make offsets of spill slots and outgoing parameters independent so that they can be allocated at the same time, eliminating the separate phases. This makes the separate StackBlock unnecesary. Change CiStackSlot to use byte offsets instead of spill slot index. This makes CiTarget.spillSlotSize unnecessary.
author | Christian Wimmer <Christian.Wimmer@Oracle.com> |
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date | Mon, 02 Jan 2012 14:16:08 -0800 |
parents | e5383553fd4e |
children | da91efe96a93 |
rev | line source |
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0 | 1 /* |
2227 | 2 * Copyright (c) 2005, 2011, 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). | |
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 * | |
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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::follow_contents(ParCompactionManager* cm) { | |
61 assert (PSParallelCompact::mark_bitmap()->is_marked(this), | |
62 "should be marked"); | |
63 blueprint()->oop_follow_contents(cm, this); | |
64 } | |
65 | |
66 // Used by parallel old GC. | |
67 | |
68 inline void oopDesc::follow_header(ParCompactionManager* cm) { | |
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69 if (UseCompressedOops) { |
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70 PSParallelCompact::mark_and_push(cm, compressed_klass_addr()); |
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71 } else { |
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72 PSParallelCompact::mark_and_push(cm, klass_addr()); |
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73 } |
0 | 74 } |
75 | |
76 inline oop oopDesc::forward_to_atomic(oop p) { | |
77 assert(ParNewGeneration::is_legal_forward_ptr(p), | |
78 "illegal forwarding pointer value."); | |
79 markOop oldMark = mark(); | |
80 markOop forwardPtrMark = markOopDesc::encode_pointer_as_mark(p); | |
81 markOop curMark; | |
82 | |
83 assert(forwardPtrMark->decode_pointer() == p, "encoding must be reversable"); | |
84 assert(sizeof(markOop) == sizeof(intptr_t), "CAS below requires this."); | |
85 | |
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86 while (!oldMark->is_marked()) { |
0 | 87 curMark = (markOop)Atomic::cmpxchg_ptr(forwardPtrMark, &_mark, oldMark); |
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88 assert(is_forwarded(), "object should have been forwarded"); |
0 | 89 if (curMark == oldMark) { |
90 return NULL; | |
91 } | |
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92 // If the CAS was unsuccessful then curMark->is_marked() |
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93 // should return true as another thread has CAS'd in another |
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94 // forwarding pointer. |
0 | 95 oldMark = curMark; |
96 } | |
97 return forwardee(); | |
98 } | |
99 | |
100 inline void oopDesc::update_header() { | |
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101 if (UseCompressedOops) { |
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102 PSParallelCompact::adjust_pointer(compressed_klass_addr()); |
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103 } else { |
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104 PSParallelCompact::adjust_pointer(klass_addr()); |
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105 } |
0 | 106 } |
107 | |
1972 | 108 #endif // SHARE_VM_OOPS_OOP_PCGC_INLINE_HPP |