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annotate src/share/vm/gc_implementation/concurrentMarkSweep/cmsOopClosures.hpp @ 19083:09292c24d555
LSStackSlotAllocator: hide inner class.
author | Josef Eisl <josef.eisl@jku.at> |
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date | Sat, 31 Jan 2015 11:07:15 +0100 |
parents | 89152779163c |
children | 7848fc12602b |
rev | line source |
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0 | 1 /* |
17524 | 2 * Copyright (c) 2007, 2013, 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_GC_IMPLEMENTATION_CONCURRENTMARKSWEEP_CMSOOPCLOSURES_HPP |
26 #define SHARE_VM_GC_IMPLEMENTATION_CONCURRENTMARKSWEEP_CMSOOPCLOSURES_HPP | |
27 | |
28 #include "memory/genOopClosures.hpp" | |
29 | |
0 | 30 ///////////////////////////////////////////////////////////////// |
31 // Closures used by ConcurrentMarkSweepGeneration's collector | |
32 ///////////////////////////////////////////////////////////////// | |
33 class ConcurrentMarkSweepGeneration; | |
34 class CMSBitMap; | |
35 class CMSMarkStack; | |
36 class CMSCollector; | |
37 class MarkFromRootsClosure; | |
38 class Par_MarkFromRootsClosure; | |
39 | |
113
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40 // Decode the oop and call do_oop on it. |
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41 #define DO_OOP_WORK_DEFN \ |
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42 void do_oop(oop obj); \ |
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43 template <class T> inline void do_oop_work(T* p) { \ |
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44 T heap_oop = oopDesc::load_heap_oop(p); \ |
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45 if (!oopDesc::is_null(heap_oop)) { \ |
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46 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); \ |
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47 do_oop(obj); \ |
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48 } \ |
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49 } |
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50 |
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51 // Applies the given oop closure to all oops in all klasses visited. |
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52 class CMKlassClosure : public KlassClosure { |
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53 friend class CMSOopClosure; |
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54 friend class CMSOopsInGenClosure; |
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55 |
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56 OopClosure* _oop_closure; |
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57 |
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58 // Used when _oop_closure couldn't be set in an initialization list. |
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59 void initialize(OopClosure* oop_closure) { |
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60 assert(_oop_closure == NULL, "Should only be called once"); |
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61 _oop_closure = oop_closure; |
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62 } |
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63 public: |
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64 CMKlassClosure(OopClosure* oop_closure = NULL) : _oop_closure(oop_closure) { } |
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65 |
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66 void do_klass(Klass* k); |
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67 }; |
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68 |
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69 // The base class for all CMS marking closures. |
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70 // It's used to proxy through the metadata to the oops defined in them. |
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71 class CMSOopClosure: public ExtendedOopClosure { |
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72 CMKlassClosure _klass_closure; |
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73 public: |
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74 CMSOopClosure() : ExtendedOopClosure() { |
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75 _klass_closure.initialize(this); |
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76 } |
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77 CMSOopClosure(ReferenceProcessor* rp) : ExtendedOopClosure(rp) { |
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78 _klass_closure.initialize(this); |
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79 } |
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80 |
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81 virtual bool do_metadata() { return do_metadata_nv(); } |
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82 inline bool do_metadata_nv() { return true; } |
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83 |
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84 virtual void do_klass(Klass* k); |
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85 void do_klass_nv(Klass* k); |
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86 |
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87 virtual void do_class_loader_data(ClassLoaderData* cld); |
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88 }; |
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89 |
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90 // TODO: This duplication of the CMSOopClosure class is only needed because |
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91 // some CMS OopClosures derive from OopsInGenClosure. It would be good |
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92 // to get rid of them completely. |
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93 class CMSOopsInGenClosure: public OopsInGenClosure { |
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94 CMKlassClosure _klass_closure; |
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95 public: |
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96 CMSOopsInGenClosure() { |
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97 _klass_closure.initialize(this); |
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98 } |
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99 |
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100 virtual bool do_metadata() { return do_metadata_nv(); } |
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101 inline bool do_metadata_nv() { return true; } |
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102 |
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103 virtual void do_klass(Klass* k); |
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104 void do_klass_nv(Klass* k); |
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105 |
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106 virtual void do_class_loader_data(ClassLoaderData* cld); |
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107 }; |
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108 |
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109 class MarkRefsIntoClosure: public CMSOopsInGenClosure { |
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110 private: |
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111 const MemRegion _span; |
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112 CMSBitMap* _bitMap; |
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113 protected: |
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114 DO_OOP_WORK_DEFN |
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116 MarkRefsIntoClosure(MemRegion span, CMSBitMap* bitMap); |
113
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117 virtual void do_oop(oop* p); |
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118 virtual void do_oop(narrowOop* p); |
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119 |
0 | 120 Prefetch::style prefetch_style() { |
121 return Prefetch::do_read; | |
122 } | |
123 }; | |
124 | |
11975 | 125 class Par_MarkRefsIntoClosure: public CMSOopsInGenClosure { |
126 private: | |
127 const MemRegion _span; | |
128 CMSBitMap* _bitMap; | |
129 protected: | |
130 DO_OOP_WORK_DEFN | |
131 public: | |
132 Par_MarkRefsIntoClosure(MemRegion span, CMSBitMap* bitMap); | |
133 virtual void do_oop(oop* p); | |
134 virtual void do_oop(narrowOop* p); | |
135 | |
136 Prefetch::style prefetch_style() { | |
137 return Prefetch::do_read; | |
138 } | |
139 }; | |
140 | |
0 | 141 // A variant of the above used in certain kinds of CMS |
142 // marking verification. | |
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143 class MarkRefsIntoVerifyClosure: public CMSOopsInGenClosure { |
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144 private: |
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145 const MemRegion _span; |
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146 CMSBitMap* _verification_bm; |
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147 CMSBitMap* _cms_bm; |
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148 protected: |
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149 DO_OOP_WORK_DEFN |
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151 MarkRefsIntoVerifyClosure(MemRegion span, CMSBitMap* verification_bm, | |
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152 CMSBitMap* cms_bm); |
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153 virtual void do_oop(oop* p); |
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154 virtual void do_oop(narrowOop* p); |
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155 |
0 | 156 Prefetch::style prefetch_style() { |
157 return Prefetch::do_read; | |
158 } | |
159 }; | |
160 | |
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161 // The non-parallel version (the parallel version appears further below). |
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162 class PushAndMarkClosure: public CMSOopClosure { |
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163 private: |
935 | 164 CMSCollector* _collector; |
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165 MemRegion _span; |
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166 CMSBitMap* _bit_map; |
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167 CMSBitMap* _mod_union_table; |
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168 CMSMarkStack* _mark_stack; |
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169 bool _concurrent_precleaning; |
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170 protected: |
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171 DO_OOP_WORK_DEFN |
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173 PushAndMarkClosure(CMSCollector* collector, | |
174 MemRegion span, | |
175 ReferenceProcessor* rp, | |
176 CMSBitMap* bit_map, | |
177 CMSBitMap* mod_union_table, | |
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178 CMSMarkStack* mark_stack, |
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179 bool concurrent_precleaning); |
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180 virtual void do_oop(oop* p); |
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181 virtual void do_oop(narrowOop* p); |
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182 inline void do_oop_nv(oop* p) { PushAndMarkClosure::do_oop_work(p); } |
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183 inline void do_oop_nv(narrowOop* p) { PushAndMarkClosure::do_oop_work(p); } |
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184 |
0 | 185 Prefetch::style prefetch_style() { |
186 return Prefetch::do_read; | |
187 } | |
188 }; | |
189 | |
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190 // In the parallel case, the bit map and the |
0 | 191 // reference processor are currently all shared. Access to |
192 // these shared mutable structures must use appropriate | |
193 // synchronization (for instance, via CAS). The marking stack | |
194 // used in the non-parallel case above is here replaced with | |
195 // an OopTaskQueue structure to allow efficient work stealing. | |
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196 class Par_PushAndMarkClosure: public CMSOopClosure { |
113
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197 private: |
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198 CMSCollector* _collector; |
113
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199 MemRegion _span; |
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200 CMSBitMap* _bit_map; |
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201 OopTaskQueue* _work_queue; |
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202 protected: |
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203 DO_OOP_WORK_DEFN |
0 | 204 public: |
205 Par_PushAndMarkClosure(CMSCollector* collector, | |
206 MemRegion span, | |
207 ReferenceProcessor* rp, | |
208 CMSBitMap* bit_map, | |
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209 OopTaskQueue* work_queue); |
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210 virtual void do_oop(oop* p); |
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211 virtual void do_oop(narrowOop* p); |
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212 inline void do_oop_nv(oop* p) { Par_PushAndMarkClosure::do_oop_work(p); } |
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213 inline void do_oop_nv(narrowOop* p) { Par_PushAndMarkClosure::do_oop_work(p); } |
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214 |
0 | 215 Prefetch::style prefetch_style() { |
216 return Prefetch::do_read; | |
217 } | |
218 }; | |
219 | |
220 // The non-parallel version (the parallel version appears further below). | |
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221 class MarkRefsIntoAndScanClosure: public CMSOopsInGenClosure { |
113
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222 private: |
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223 MemRegion _span; |
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224 CMSBitMap* _bit_map; |
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225 CMSMarkStack* _mark_stack; |
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226 PushAndMarkClosure _pushAndMarkClosure; |
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227 CMSCollector* _collector; |
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228 Mutex* _freelistLock; |
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229 bool _yield; |
0 | 230 // Whether closure is being used for concurrent precleaning |
113
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231 bool _concurrent_precleaning; |
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232 protected: |
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233 DO_OOP_WORK_DEFN |
0 | 234 public: |
235 MarkRefsIntoAndScanClosure(MemRegion span, | |
236 ReferenceProcessor* rp, | |
237 CMSBitMap* bit_map, | |
238 CMSBitMap* mod_union_table, | |
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239 CMSMarkStack* mark_stack, |
0 | 240 CMSCollector* collector, |
241 bool should_yield, | |
242 bool concurrent_precleaning); | |
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243 virtual void do_oop(oop* p); |
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244 virtual void do_oop(narrowOop* p); |
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245 inline void do_oop_nv(oop* p) { MarkRefsIntoAndScanClosure::do_oop_work(p); } |
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246 inline void do_oop_nv(narrowOop* p) { MarkRefsIntoAndScanClosure::do_oop_work(p); } |
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247 |
0 | 248 Prefetch::style prefetch_style() { |
249 return Prefetch::do_read; | |
250 } | |
251 void set_freelistLock(Mutex* m) { | |
252 _freelistLock = m; | |
253 } | |
254 | |
255 private: | |
256 inline void do_yield_check(); | |
257 void do_yield_work(); | |
258 bool take_from_overflow_list(); | |
259 }; | |
260 | |
14909 | 261 // Tn this, the parallel avatar of MarkRefsIntoAndScanClosure, the revisit |
0 | 262 // stack and the bitMap are shared, so access needs to be suitably |
14909 | 263 // sycnhronized. An OopTaskQueue structure, supporting efficient |
264 // workstealing, replaces a CMSMarkStack for storing grey objects. | |
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265 class Par_MarkRefsIntoAndScanClosure: public CMSOopsInGenClosure { |
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266 private: |
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267 MemRegion _span; |
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268 CMSBitMap* _bit_map; |
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269 OopTaskQueue* _work_queue; |
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270 const uint _low_water_mark; |
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271 Par_PushAndMarkClosure _par_pushAndMarkClosure; |
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272 protected: |
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273 DO_OOP_WORK_DEFN |
0 | 274 public: |
275 Par_MarkRefsIntoAndScanClosure(CMSCollector* collector, | |
276 MemRegion span, | |
277 ReferenceProcessor* rp, | |
278 CMSBitMap* bit_map, | |
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279 OopTaskQueue* work_queue); |
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280 virtual void do_oop(oop* p); |
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281 virtual void do_oop(narrowOop* p); |
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282 inline void do_oop_nv(oop* p) { Par_MarkRefsIntoAndScanClosure::do_oop_work(p); } |
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283 inline void do_oop_nv(narrowOop* p) { Par_MarkRefsIntoAndScanClosure::do_oop_work(p); } |
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284 |
0 | 285 Prefetch::style prefetch_style() { |
286 return Prefetch::do_read; | |
287 } | |
288 void trim_queue(uint size); | |
289 }; | |
290 | |
291 // This closure is used during the concurrent marking phase | |
292 // following the first checkpoint. Its use is buried in | |
293 // the closure MarkFromRootsClosure. | |
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294 class PushOrMarkClosure: public CMSOopClosure { |
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295 private: |
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296 CMSCollector* _collector; |
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297 MemRegion _span; |
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298 CMSBitMap* _bitMap; |
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299 CMSMarkStack* _markStack; |
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300 HeapWord* const _finger; |
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301 MarkFromRootsClosure* const |
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302 _parent; |
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303 protected: |
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304 DO_OOP_WORK_DEFN |
0 | 305 public: |
306 PushOrMarkClosure(CMSCollector* cms_collector, | |
307 MemRegion span, | |
308 CMSBitMap* bitMap, | |
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309 CMSMarkStack* markStack, |
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310 HeapWord* finger, |
0 | 311 MarkFromRootsClosure* parent); |
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312 virtual void do_oop(oop* p); |
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313 virtual void do_oop(narrowOop* p); |
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314 inline void do_oop_nv(oop* p) { PushOrMarkClosure::do_oop_work(p); } |
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315 inline void do_oop_nv(narrowOop* p) { PushOrMarkClosure::do_oop_work(p); } |
941 | 316 |
0 | 317 // Deal with a stack overflow condition |
318 void handle_stack_overflow(HeapWord* lost); | |
319 private: | |
320 inline void do_yield_check(); | |
321 }; | |
322 | |
323 // A parallel (MT) version of the above. | |
324 // This closure is used during the concurrent marking phase | |
325 // following the first checkpoint. Its use is buried in | |
326 // the closure Par_MarkFromRootsClosure. | |
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327 class Par_PushOrMarkClosure: public CMSOopClosure { |
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328 private: |
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329 CMSCollector* _collector; |
0 | 330 MemRegion _whole_span; |
331 MemRegion _span; // local chunk | |
332 CMSBitMap* _bit_map; | |
333 OopTaskQueue* _work_queue; | |
334 CMSMarkStack* _overflow_stack; | |
335 HeapWord* const _finger; | |
336 HeapWord** const _global_finger_addr; | |
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337 Par_MarkFromRootsClosure* const |
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338 _parent; |
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339 protected: |
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340 DO_OOP_WORK_DEFN |
0 | 341 public: |
342 Par_PushOrMarkClosure(CMSCollector* cms_collector, | |
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343 MemRegion span, |
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344 CMSBitMap* bit_map, |
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345 OopTaskQueue* work_queue, |
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346 CMSMarkStack* mark_stack, |
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347 HeapWord* finger, |
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348 HeapWord** global_finger_addr, |
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349 Par_MarkFromRootsClosure* parent); |
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350 virtual void do_oop(oop* p); |
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351 virtual void do_oop(narrowOop* p); |
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352 inline void do_oop_nv(oop* p) { Par_PushOrMarkClosure::do_oop_work(p); } |
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353 inline void do_oop_nv(narrowOop* p) { Par_PushOrMarkClosure::do_oop_work(p); } |
941 | 354 |
0 | 355 // Deal with a stack overflow condition |
356 void handle_stack_overflow(HeapWord* lost); | |
357 private: | |
358 inline void do_yield_check(); | |
359 }; | |
360 | |
361 // For objects in CMS generation, this closure marks | |
362 // given objects (transitively) as being reachable/live. | |
363 // This is currently used during the (weak) reference object | |
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364 // processing phase of the CMS final checkpoint step, as |
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365 // well as during the concurrent precleaning of the discovered |
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366 // reference lists. |
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367 class CMSKeepAliveClosure: public CMSOopClosure { |
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368 private: |
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369 CMSCollector* _collector; |
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370 const MemRegion _span; |
0 | 371 CMSMarkStack* _mark_stack; |
372 CMSBitMap* _bit_map; | |
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373 bool _concurrent_precleaning; |
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374 protected: |
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375 DO_OOP_WORK_DEFN |
0 | 376 public: |
377 CMSKeepAliveClosure(CMSCollector* collector, MemRegion span, | |
452
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378 CMSBitMap* bit_map, CMSMarkStack* mark_stack, |
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379 bool cpc); |
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380 bool concurrent_precleaning() const { return _concurrent_precleaning; } |
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381 virtual void do_oop(oop* p); |
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382 virtual void do_oop(narrowOop* p); |
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383 inline void do_oop_nv(oop* p) { CMSKeepAliveClosure::do_oop_work(p); } |
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384 inline void do_oop_nv(narrowOop* p) { CMSKeepAliveClosure::do_oop_work(p); } |
0 | 385 }; |
386 | |
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387 class CMSInnerParMarkAndPushClosure: public CMSOopClosure { |
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388 private: |
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389 CMSCollector* _collector; |
0 | 390 MemRegion _span; |
391 OopTaskQueue* _work_queue; | |
392 CMSBitMap* _bit_map; | |
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393 protected: |
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394 DO_OOP_WORK_DEFN |
0 | 395 public: |
396 CMSInnerParMarkAndPushClosure(CMSCollector* collector, | |
397 MemRegion span, CMSBitMap* bit_map, | |
935 | 398 OopTaskQueue* work_queue); |
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399 virtual void do_oop(oop* p); |
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400 virtual void do_oop(narrowOop* p); |
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401 inline void do_oop_nv(oop* p) { CMSInnerParMarkAndPushClosure::do_oop_work(p); } |
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402 inline void do_oop_nv(narrowOop* p) { CMSInnerParMarkAndPushClosure::do_oop_work(p); } |
0 | 403 }; |
404 | |
405 // A parallel (MT) version of the above, used when | |
406 // reference processing is parallel; the only difference | |
407 // is in the do_oop method. | |
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408 class CMSParKeepAliveClosure: public CMSOopClosure { |
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409 private: |
0 | 410 MemRegion _span; |
411 OopTaskQueue* _work_queue; | |
412 CMSBitMap* _bit_map; | |
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413 CMSInnerParMarkAndPushClosure |
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414 _mark_and_push; |
0 | 415 const uint _low_water_mark; |
416 void trim_queue(uint max); | |
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417 protected: |
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418 DO_OOP_WORK_DEFN |
0 | 419 public: |
420 CMSParKeepAliveClosure(CMSCollector* collector, MemRegion span, | |
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421 CMSBitMap* bit_map, OopTaskQueue* work_queue); |
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422 virtual void do_oop(oop* p); |
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423 virtual void do_oop(narrowOop* p); |
0 | 424 }; |
1972 | 425 |
426 #endif // SHARE_VM_GC_IMPLEMENTATION_CONCURRENTMARKSWEEP_CMSOOPCLOSURES_HPP |