Mercurial > hg > truffle
annotate src/share/vm/memory/genOopClosures.inline.hpp @ 1339:09ac706c2623
Merge
author | asaha |
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date | Wed, 24 Mar 2010 17:16:33 -0700 |
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0 | 1 /* |
196 | 2 * Copyright 2001-2008 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 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 | |
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41 template <class T> inline void OopsInGenClosure::do_barrier(T* p) { |
0 | 42 assert(generation()->is_in_reserved(p), "expected ref in generation"); |
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43 T heap_oop = oopDesc::load_heap_oop(p); |
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44 assert(!oopDesc::is_null(heap_oop), "expected non-null oop"); |
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45 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); |
0 | 46 // If p points to a younger generation, mark the card. |
47 if ((HeapWord*)obj < _gen_boundary) { | |
48 _rs->inline_write_ref_field_gc(p, obj); | |
49 } | |
50 } | |
51 | |
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52 template <class T> inline void OopsInGenClosure::par_do_barrier(T* p) { |
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53 assert(generation()->is_in_reserved(p), "expected ref in generation"); |
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54 T heap_oop = oopDesc::load_heap_oop(p); |
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55 assert(!oopDesc::is_null(heap_oop), "expected non-null oop"); |
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56 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); |
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57 // If p points to a younger generation, mark the card. |
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58 if ((HeapWord*)obj < gen_boundary()) { |
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59 rs()->write_ref_field_gc_par(p, obj); |
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60 } |
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61 } |
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62 |
0 | 63 // NOTE! Any changes made here should also be made |
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64 // in FastScanClosure::do_oop_work() |
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65 template <class T> inline void ScanClosure::do_oop_work(T* p) { |
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66 T heap_oop = oopDesc::load_heap_oop(p); |
0 | 67 // Should we copy the obj? |
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68 if (!oopDesc::is_null(heap_oop)) { |
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69 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); |
0 | 70 if ((HeapWord*)obj < _boundary) { |
71 assert(!_g->to()->is_in_reserved(obj), "Scanning field twice?"); | |
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72 oop new_obj = obj->is_forwarded() ? obj->forwardee() |
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73 : _g->copy_to_survivor_space(obj); |
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74 oopDesc::encode_store_heap_oop_not_null(p, new_obj); |
0 | 75 } |
76 if (_gc_barrier) { | |
77 // Now call parent closure | |
78 do_barrier(p); | |
79 } | |
80 } | |
81 } | |
82 | |
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83 inline void ScanClosure::do_oop_nv(oop* p) { ScanClosure::do_oop_work(p); } |
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84 inline void ScanClosure::do_oop_nv(narrowOop* p) { ScanClosure::do_oop_work(p); } |
0 | 85 |
86 // NOTE! Any changes made here should also be made | |
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87 // in ScanClosure::do_oop_work() |
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88 template <class T> inline void FastScanClosure::do_oop_work(T* p) { |
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89 T heap_oop = oopDesc::load_heap_oop(p); |
0 | 90 // Should we copy the obj? |
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91 if (!oopDesc::is_null(heap_oop)) { |
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92 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); |
0 | 93 if ((HeapWord*)obj < _boundary) { |
94 assert(!_g->to()->is_in_reserved(obj), "Scanning field twice?"); | |
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95 oop new_obj = obj->is_forwarded() ? obj->forwardee() |
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96 : _g->copy_to_survivor_space(obj); |
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97 oopDesc::encode_store_heap_oop_not_null(p, new_obj); |
0 | 98 if (_gc_barrier) { |
99 // Now call parent closure | |
100 do_barrier(p); | |
101 } | |
102 } | |
103 } | |
104 } | |
105 | |
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106 inline void FastScanClosure::do_oop_nv(oop* p) { FastScanClosure::do_oop_work(p); } |
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107 inline void FastScanClosure::do_oop_nv(narrowOop* p) { FastScanClosure::do_oop_work(p); } |
0 | 108 |
109 // Note similarity to ScanClosure; the difference is that | |
110 // the barrier set is taken care of outside this closure. | |
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111 template <class T> inline void ScanWeakRefClosure::do_oop_work(T* p) { |
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112 assert(!oopDesc::is_null(*p), "null weak reference?"); |
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113 oop obj = oopDesc::load_decode_heap_oop_not_null(p); |
0 | 114 // weak references are sometimes scanned twice; must check |
115 // that to-space doesn't already contain this object | |
116 if ((HeapWord*)obj < _boundary && !_g->to()->is_in_reserved(obj)) { | |
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117 oop new_obj = obj->is_forwarded() ? obj->forwardee() |
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118 : _g->copy_to_survivor_space(obj); |
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119 oopDesc::encode_store_heap_oop_not_null(p, new_obj); |
0 | 120 } |
121 } | |
122 | |
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123 inline void ScanWeakRefClosure::do_oop_nv(oop* p) { ScanWeakRefClosure::do_oop_work(p); } |
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124 inline void ScanWeakRefClosure::do_oop_nv(narrowOop* p) { ScanWeakRefClosure::do_oop_work(p); } |