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annotate src/share/vm/memory/genOopClosures.hpp @ 1972:f95d63e2154a
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Summary: Replaced MakeDeps and the includeDB files with more standardized solutions.
Reviewed-by: coleenp, kvn, kamg
| author | stefank |
|---|---|
| date | Tue, 23 Nov 2010 13:22:55 -0800 |
| parents | c18cbe5936b8 |
| children | 2a23b1b5a0a8 |
| 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_HPP |
| 26 #define SHARE_VM_MEMORY_GENOOPCLOSURES_HPP | |
| 27 | |
| 28 #include "memory/iterator.hpp" | |
| 29 #include "oops/oop.hpp" | |
| 30 | |
| 0 | 31 class Generation; |
| 32 class HeapWord; | |
| 33 class CardTableRS; | |
| 34 class CardTableModRefBS; | |
| 35 class DefNewGeneration; | |
| 36 | |
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37 template<class E, unsigned int N> class GenericTaskQueue; |
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38 typedef GenericTaskQueue<oop, TASKQUEUE_SIZE> OopTaskQueue; |
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39 template<class T> class GenericTaskQueueSet; |
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40 typedef GenericTaskQueueSet<OopTaskQueue> OopTaskQueueSet; |
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41 |
| 0 | 42 // Closure for iterating roots from a particular generation |
| 43 // Note: all classes deriving from this MUST call this do_barrier | |
| 44 // method at the end of their own do_oop method! | |
| 45 // Note: no do_oop defined, this is an abstract class. | |
| 46 | |
| 47 class OopsInGenClosure : public OopClosure { | |
| 48 private: | |
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49 Generation* _orig_gen; // generation originally set in ctor |
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50 Generation* _gen; // generation being scanned |
| 0 | 51 |
| 52 protected: | |
| 53 // Some subtypes need access. | |
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54 HeapWord* _gen_boundary; // start of generation |
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55 CardTableRS* _rs; // remembered set |
| 0 | 56 |
| 57 // For assertions | |
| 58 Generation* generation() { return _gen; } | |
| 59 CardTableRS* rs() { return _rs; } | |
| 60 | |
| 61 // Derived classes that modify oops so that they might be old-to-young | |
| 62 // pointers must call the method below. | |
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63 template <class T> void do_barrier(T* p); |
| 0 | 64 |
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65 // Version for use by closures that may be called in parallel code. |
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66 template <class T> void par_do_barrier(T* p); |
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67 |
| 0 | 68 public: |
| 69 OopsInGenClosure() : OopClosure(NULL), | |
| 70 _orig_gen(NULL), _gen(NULL), _gen_boundary(NULL), _rs(NULL) {}; | |
| 71 | |
| 72 OopsInGenClosure(Generation* gen); | |
| 73 void set_generation(Generation* gen); | |
| 74 | |
| 75 void reset_generation() { _gen = _orig_gen; } | |
| 76 | |
| 77 // Problem with static closures: must have _gen_boundary set at some point, | |
| 78 // but cannot do this until after the heap is initialized. | |
| 79 void set_orig_generation(Generation* gen) { | |
| 80 _orig_gen = gen; | |
| 81 set_generation(gen); | |
| 82 } | |
| 83 | |
| 84 HeapWord* gen_boundary() { return _gen_boundary; } | |
| 85 }; | |
| 86 | |
| 87 // Closure for scanning DefNewGeneration. | |
| 88 // | |
| 89 // This closure will perform barrier store calls for ALL | |
| 90 // pointers in scanned oops. | |
| 91 class ScanClosure: public OopsInGenClosure { | |
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92 protected: |
| 0 | 93 DefNewGeneration* _g; |
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94 HeapWord* _boundary; |
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95 bool _gc_barrier; |
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96 template <class T> inline void do_oop_work(T* p); |
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97 public: |
| 0 | 98 ScanClosure(DefNewGeneration* g, bool gc_barrier); |
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99 virtual void do_oop(oop* p); |
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100 virtual void do_oop(narrowOop* p); |
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101 inline void do_oop_nv(oop* p); |
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102 inline void do_oop_nv(narrowOop* p); |
| 0 | 103 bool do_header() { return false; } |
| 104 Prefetch::style prefetch_style() { | |
| 105 return Prefetch::do_write; | |
| 106 } | |
| 107 }; | |
| 108 | |
| 109 // Closure for scanning DefNewGeneration. | |
| 110 // | |
| 111 // This closure only performs barrier store calls on | |
| 112 // pointers into the DefNewGeneration. This is less | |
| 113 // precise, but faster, than a ScanClosure | |
| 114 class FastScanClosure: public OopsInGenClosure { | |
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115 protected: |
| 0 | 116 DefNewGeneration* _g; |
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117 HeapWord* _boundary; |
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118 bool _gc_barrier; |
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119 template <class T> inline void do_oop_work(T* p); |
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120 public: |
| 0 | 121 FastScanClosure(DefNewGeneration* g, bool gc_barrier); |
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122 virtual void do_oop(oop* p); |
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123 virtual void do_oop(narrowOop* p); |
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124 inline void do_oop_nv(oop* p); |
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125 inline void do_oop_nv(narrowOop* p); |
| 0 | 126 bool do_header() { return false; } |
| 127 Prefetch::style prefetch_style() { | |
| 128 return Prefetch::do_write; | |
| 129 } | |
| 130 }; | |
| 131 | |
| 132 class FilteringClosure: public OopClosure { | |
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133 private: |
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134 HeapWord* _boundary; |
| 0 | 135 OopClosure* _cl; |
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136 protected: |
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137 template <class T> inline void do_oop_work(T* p) { |
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138 T heap_oop = oopDesc::load_heap_oop(p); |
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139 if (!oopDesc::is_null(heap_oop)) { |
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140 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); |
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141 if ((HeapWord*)obj < _boundary) { |
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142 _cl->do_oop(p); |
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143 } |
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144 } |
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145 } |
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146 public: |
| 0 | 147 FilteringClosure(HeapWord* boundary, OopClosure* cl) : |
| 148 OopClosure(cl->_ref_processor), _boundary(boundary), | |
| 149 _cl(cl) {} | |
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150 virtual void do_oop(oop* p); |
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151 virtual void do_oop(narrowOop* p); |
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152 inline void do_oop_nv(oop* p) { FilteringClosure::do_oop_work(p); } |
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153 inline void do_oop_nv(narrowOop* p) { FilteringClosure::do_oop_work(p); } |
| 0 | 154 bool do_header() { return false; } |
| 155 }; | |
| 156 | |
| 157 // Closure for scanning DefNewGeneration's weak references. | |
| 158 // NOTE: very much like ScanClosure but not derived from | |
| 159 // OopsInGenClosure -- weak references are processed all | |
| 160 // at once, with no notion of which generation they were in. | |
| 161 class ScanWeakRefClosure: public OopClosure { | |
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162 protected: |
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163 DefNewGeneration* _g; |
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164 HeapWord* _boundary; |
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165 template <class T> inline void do_oop_work(T* p); |
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166 public: |
| 0 | 167 ScanWeakRefClosure(DefNewGeneration* g); |
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168 virtual void do_oop(oop* p); |
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169 virtual void do_oop(narrowOop* p); |
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170 inline void do_oop_nv(oop* p); |
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171 inline void do_oop_nv(narrowOop* p); |
| 0 | 172 }; |
| 173 | |
| 174 class VerifyOopClosure: public OopClosure { | |
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175 protected: |
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176 template <class T> inline void do_oop_work(T* p) { |
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177 oop obj = oopDesc::load_decode_heap_oop(p); |
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178 guarantee(obj->is_oop_or_null(), "invalid oop"); |
| 0 | 179 } |
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180 public: |
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181 virtual void do_oop(oop* p); |
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182 virtual void do_oop(narrowOop* p); |
| 0 | 183 static VerifyOopClosure verify_oop; |
| 184 }; | |
| 1972 | 185 |
| 186 #endif // SHARE_VM_MEMORY_GENOOPCLOSURES_HPP |