Mercurial > hg > truffle
annotate src/share/vm/memory/genOopClosures.hpp @ 994:753cf9794df9
6885169: merge of 4957990 and 6863023 causes conflict on do_nmethods
Summary: After mechanically merging changes, some by-hand adjustments are needed.
Reviewed-by: ysr
author | jrose |
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date | Wed, 23 Sep 2009 23:57:44 -0700 |
parents | df6caf649ff7 |
children | 2a1472c30599 |
rev | line source |
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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 class Generation; | |
26 class HeapWord; | |
27 class CardTableRS; | |
28 class CardTableModRefBS; | |
29 class DefNewGeneration; | |
30 | |
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31 template<class E> class GenericTaskQueue; |
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32 typedef GenericTaskQueue<oop> OopTaskQueue; |
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33 template<class E> class GenericTaskQueueSet; |
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34 typedef GenericTaskQueueSet<oop> OopTaskQueueSet; |
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35 |
0 | 36 // Closure for iterating roots from a particular generation |
37 // Note: all classes deriving from this MUST call this do_barrier | |
38 // method at the end of their own do_oop method! | |
39 // Note: no do_oop defined, this is an abstract class. | |
40 | |
41 class OopsInGenClosure : public OopClosure { | |
42 private: | |
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43 Generation* _orig_gen; // generation originally set in ctor |
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44 Generation* _gen; // generation being scanned |
0 | 45 |
46 protected: | |
47 // Some subtypes need access. | |
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48 HeapWord* _gen_boundary; // start of generation |
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49 CardTableRS* _rs; // remembered set |
0 | 50 |
51 // For assertions | |
52 Generation* generation() { return _gen; } | |
53 CardTableRS* rs() { return _rs; } | |
54 | |
55 // Derived classes that modify oops so that they might be old-to-young | |
56 // pointers must call the method below. | |
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57 template <class T> void do_barrier(T* p); |
0 | 58 |
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59 // Version for use by closures that may be called in parallel code. |
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60 template <class T> void par_do_barrier(T* p); |
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61 |
0 | 62 public: |
63 OopsInGenClosure() : OopClosure(NULL), | |
64 _orig_gen(NULL), _gen(NULL), _gen_boundary(NULL), _rs(NULL) {}; | |
65 | |
66 OopsInGenClosure(Generation* gen); | |
67 void set_generation(Generation* gen); | |
68 | |
69 void reset_generation() { _gen = _orig_gen; } | |
70 | |
71 // Problem with static closures: must have _gen_boundary set at some point, | |
72 // but cannot do this until after the heap is initialized. | |
73 void set_orig_generation(Generation* gen) { | |
74 _orig_gen = gen; | |
75 set_generation(gen); | |
76 } | |
77 | |
78 HeapWord* gen_boundary() { return _gen_boundary; } | |
79 }; | |
80 | |
81 // Closure for scanning DefNewGeneration. | |
82 // | |
83 // This closure will perform barrier store calls for ALL | |
84 // pointers in scanned oops. | |
85 class ScanClosure: public OopsInGenClosure { | |
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86 protected: |
0 | 87 DefNewGeneration* _g; |
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88 HeapWord* _boundary; |
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89 bool _gc_barrier; |
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90 template <class T> inline void do_oop_work(T* p); |
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91 public: |
0 | 92 ScanClosure(DefNewGeneration* g, bool gc_barrier); |
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93 virtual void do_oop(oop* p); |
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94 virtual void do_oop(narrowOop* p); |
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95 inline void do_oop_nv(oop* p); |
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96 inline void do_oop_nv(narrowOop* p); |
0 | 97 bool do_header() { return false; } |
98 Prefetch::style prefetch_style() { | |
99 return Prefetch::do_write; | |
100 } | |
101 }; | |
102 | |
103 // Closure for scanning DefNewGeneration. | |
104 // | |
105 // This closure only performs barrier store calls on | |
106 // pointers into the DefNewGeneration. This is less | |
107 // precise, but faster, than a ScanClosure | |
108 class FastScanClosure: public OopsInGenClosure { | |
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109 protected: |
0 | 110 DefNewGeneration* _g; |
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111 HeapWord* _boundary; |
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112 bool _gc_barrier; |
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113 template <class T> inline void do_oop_work(T* p); |
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114 public: |
0 | 115 FastScanClosure(DefNewGeneration* g, bool gc_barrier); |
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116 virtual void do_oop(oop* p); |
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117 virtual void do_oop(narrowOop* p); |
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118 inline void do_oop_nv(oop* p); |
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119 inline void do_oop_nv(narrowOop* p); |
0 | 120 bool do_header() { return false; } |
121 Prefetch::style prefetch_style() { | |
122 return Prefetch::do_write; | |
123 } | |
124 }; | |
125 | |
126 class FilteringClosure: public OopClosure { | |
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127 private: |
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128 HeapWord* _boundary; |
0 | 129 OopClosure* _cl; |
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130 protected: |
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131 template <class T> inline void do_oop_work(T* p) { |
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132 T heap_oop = oopDesc::load_heap_oop(p); |
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133 if (!oopDesc::is_null(heap_oop)) { |
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134 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); |
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135 if ((HeapWord*)obj < _boundary) { |
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136 _cl->do_oop(p); |
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137 } |
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138 } |
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139 } |
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140 public: |
0 | 141 FilteringClosure(HeapWord* boundary, OopClosure* cl) : |
142 OopClosure(cl->_ref_processor), _boundary(boundary), | |
143 _cl(cl) {} | |
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144 virtual void do_oop(oop* p); |
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145 virtual void do_oop(narrowOop* p); |
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146 inline void do_oop_nv(oop* p) { FilteringClosure::do_oop_work(p); } |
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147 inline void do_oop_nv(narrowOop* p) { FilteringClosure::do_oop_work(p); } |
0 | 148 bool do_header() { return false; } |
149 }; | |
150 | |
151 // Closure for scanning DefNewGeneration's weak references. | |
152 // NOTE: very much like ScanClosure but not derived from | |
153 // OopsInGenClosure -- weak references are processed all | |
154 // at once, with no notion of which generation they were in. | |
155 class ScanWeakRefClosure: public OopClosure { | |
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156 protected: |
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157 DefNewGeneration* _g; |
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158 HeapWord* _boundary; |
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159 template <class T> inline void do_oop_work(T* p); |
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160 public: |
0 | 161 ScanWeakRefClosure(DefNewGeneration* g); |
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162 virtual void do_oop(oop* p); |
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163 virtual void do_oop(narrowOop* p); |
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164 inline void do_oop_nv(oop* p); |
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165 inline void do_oop_nv(narrowOop* p); |
0 | 166 }; |
167 | |
168 class VerifyOopClosure: public OopClosure { | |
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169 protected: |
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170 template <class T> inline void do_oop_work(T* p) { |
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171 oop obj = oopDesc::load_decode_heap_oop(p); |
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172 guarantee(obj->is_oop_or_null(), "invalid oop"); |
0 | 173 } |
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174 public: |
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175 virtual void do_oop(oop* p); |
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176 virtual void do_oop(narrowOop* p); |
0 | 177 static VerifyOopClosure verify_oop; |
178 }; |