Mercurial > hg > truffle
annotate src/share/vm/memory/genOopClosures.inline.hpp @ 6027:8a2e5a6a19a4
7143490: G1: Remove HeapRegion::_top_at_conc_mark_count
Summary: Removed the HeapRegion::_top_at_conc_mark_count field. It is no longer needed as a result of the changes for 6888336 and 7127706. Refactored the closures that finalize and verify the liveness counting data so that common functionality was placed into a base class.
Reviewed-by: brutisso, tonyp
author | johnc |
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date | Wed, 25 Apr 2012 10:23:12 -0700 |
parents | f95d63e2154a |
children | da91efe96a93 |
rev | line source |
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0 | 1 /* |
1972 | 2 * Copyright (c) 2001, 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). | |
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_MEMORY_GENOOPCLOSURES_INLINE_HPP |
26 #define SHARE_VM_MEMORY_GENOOPCLOSURES_INLINE_HPP | |
27 | |
28 #include "memory/cardTableRS.hpp" | |
29 #include "memory/defNewGeneration.hpp" | |
30 #include "memory/genCollectedHeap.hpp" | |
31 #include "memory/genOopClosures.hpp" | |
32 #include "memory/genRemSet.hpp" | |
33 #include "memory/generation.hpp" | |
34 #include "memory/sharedHeap.hpp" | |
35 #include "memory/space.hpp" | |
36 | |
0 | 37 inline OopsInGenClosure::OopsInGenClosure(Generation* gen) : |
38 OopClosure(gen->ref_processor()), _orig_gen(gen), _rs(NULL) { | |
39 set_generation(gen); | |
40 } | |
41 | |
42 inline void OopsInGenClosure::set_generation(Generation* gen) { | |
43 _gen = gen; | |
44 _gen_boundary = _gen->reserved().start(); | |
45 // Barrier set for the heap, must be set after heap is initialized | |
46 if (_rs == NULL) { | |
47 GenRemSet* rs = SharedHeap::heap()->rem_set(); | |
48 assert(rs->rs_kind() == GenRemSet::CardTable, "Wrong rem set kind"); | |
49 _rs = (CardTableRS*)rs; | |
50 } | |
51 } | |
52 | |
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53 template <class T> inline void OopsInGenClosure::do_barrier(T* p) { |
0 | 54 assert(generation()->is_in_reserved(p), "expected ref in generation"); |
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55 T heap_oop = oopDesc::load_heap_oop(p); |
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56 assert(!oopDesc::is_null(heap_oop), "expected non-null oop"); |
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57 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); |
0 | 58 // If p points to a younger generation, mark the card. |
59 if ((HeapWord*)obj < _gen_boundary) { | |
60 _rs->inline_write_ref_field_gc(p, obj); | |
61 } | |
62 } | |
63 | |
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64 template <class T> inline void OopsInGenClosure::par_do_barrier(T* p) { |
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65 assert(generation()->is_in_reserved(p), "expected ref in generation"); |
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66 T heap_oop = oopDesc::load_heap_oop(p); |
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67 assert(!oopDesc::is_null(heap_oop), "expected non-null oop"); |
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68 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); |
342
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69 // If p points to a younger generation, mark the card. |
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70 if ((HeapWord*)obj < gen_boundary()) { |
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71 rs()->write_ref_field_gc_par(p, obj); |
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72 } |
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73 } |
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74 |
0 | 75 // NOTE! Any changes made here should also be made |
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76 // in FastScanClosure::do_oop_work() |
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77 template <class T> inline void ScanClosure::do_oop_work(T* p) { |
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78 T heap_oop = oopDesc::load_heap_oop(p); |
0 | 79 // Should we copy the obj? |
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80 if (!oopDesc::is_null(heap_oop)) { |
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81 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); |
0 | 82 if ((HeapWord*)obj < _boundary) { |
83 assert(!_g->to()->is_in_reserved(obj), "Scanning field twice?"); | |
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84 oop new_obj = obj->is_forwarded() ? obj->forwardee() |
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85 : _g->copy_to_survivor_space(obj); |
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86 oopDesc::encode_store_heap_oop_not_null(p, new_obj); |
0 | 87 } |
88 if (_gc_barrier) { | |
89 // Now call parent closure | |
90 do_barrier(p); | |
91 } | |
92 } | |
93 } | |
94 | |
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95 inline void ScanClosure::do_oop_nv(oop* p) { ScanClosure::do_oop_work(p); } |
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96 inline void ScanClosure::do_oop_nv(narrowOop* p) { ScanClosure::do_oop_work(p); } |
0 | 97 |
98 // NOTE! Any changes made here should also be made | |
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99 // in ScanClosure::do_oop_work() |
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100 template <class T> inline void FastScanClosure::do_oop_work(T* p) { |
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101 T heap_oop = oopDesc::load_heap_oop(p); |
0 | 102 // Should we copy the obj? |
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103 if (!oopDesc::is_null(heap_oop)) { |
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104 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); |
0 | 105 if ((HeapWord*)obj < _boundary) { |
106 assert(!_g->to()->is_in_reserved(obj), "Scanning field twice?"); | |
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107 oop new_obj = obj->is_forwarded() ? obj->forwardee() |
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108 : _g->copy_to_survivor_space(obj); |
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109 oopDesc::encode_store_heap_oop_not_null(p, new_obj); |
0 | 110 if (_gc_barrier) { |
111 // Now call parent closure | |
112 do_barrier(p); | |
113 } | |
114 } | |
115 } | |
116 } | |
117 | |
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118 inline void FastScanClosure::do_oop_nv(oop* p) { FastScanClosure::do_oop_work(p); } |
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119 inline void FastScanClosure::do_oop_nv(narrowOop* p) { FastScanClosure::do_oop_work(p); } |
0 | 120 |
121 // Note similarity to ScanClosure; the difference is that | |
122 // the barrier set is taken care of outside this closure. | |
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123 template <class T> inline void ScanWeakRefClosure::do_oop_work(T* p) { |
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124 assert(!oopDesc::is_null(*p), "null weak reference?"); |
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125 oop obj = oopDesc::load_decode_heap_oop_not_null(p); |
0 | 126 // weak references are sometimes scanned twice; must check |
127 // that to-space doesn't already contain this object | |
128 if ((HeapWord*)obj < _boundary && !_g->to()->is_in_reserved(obj)) { | |
113
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129 oop new_obj = obj->is_forwarded() ? obj->forwardee() |
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130 : _g->copy_to_survivor_space(obj); |
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131 oopDesc::encode_store_heap_oop_not_null(p, new_obj); |
0 | 132 } |
133 } | |
134 | |
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135 inline void ScanWeakRefClosure::do_oop_nv(oop* p) { ScanWeakRefClosure::do_oop_work(p); } |
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136 inline void ScanWeakRefClosure::do_oop_nv(narrowOop* p) { ScanWeakRefClosure::do_oop_work(p); } |
1972 | 137 |
138 #endif // SHARE_VM_MEMORY_GENOOPCLOSURES_INLINE_HPP |