Mercurial > hg > truffle
annotate src/share/vm/gc_implementation/concurrentMarkSweep/cmsOopClosures.hpp @ 8039:5e401ef52ec0
8007772: G1: assert(!hr->isHumongous() || mr.start() == hr->bottom()) failed: the start of HeapRegion and MemRegion should be consistent for humongous regions
Summary: In do_marking_step(), we should always give up current region after scanning the object, if the region is humongous.
Reviewed-by: brutisso, jwilhelm, tamao
author | johnc |
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date | Mon, 11 Feb 2013 15:24:48 -0800 |
parents | da91efe96a93 |
children | ca9dedeebdec |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 2007, 2012, 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 | |
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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); |
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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 | |
125 // A variant of the above used in certain kinds of CMS | |
126 // marking verification. | |
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127 class MarkRefsIntoVerifyClosure: public CMSOopsInGenClosure { |
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128 private: |
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129 const MemRegion _span; |
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130 CMSBitMap* _verification_bm; |
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131 CMSBitMap* _cms_bm; |
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132 protected: |
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133 DO_OOP_WORK_DEFN |
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135 MarkRefsIntoVerifyClosure(MemRegion span, CMSBitMap* verification_bm, | |
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136 CMSBitMap* cms_bm); |
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137 virtual void do_oop(oop* p); |
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138 virtual void do_oop(narrowOop* p); |
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139 |
0 | 140 Prefetch::style prefetch_style() { |
141 return Prefetch::do_read; | |
142 } | |
143 }; | |
144 | |
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145 // The non-parallel version (the parallel version appears further below). |
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146 class PushAndMarkClosure: public CMSOopClosure { |
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147 private: |
935 | 148 CMSCollector* _collector; |
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149 MemRegion _span; |
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150 CMSBitMap* _bit_map; |
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151 CMSBitMap* _mod_union_table; |
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152 CMSMarkStack* _mark_stack; |
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153 bool _concurrent_precleaning; |
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154 protected: |
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155 DO_OOP_WORK_DEFN |
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157 PushAndMarkClosure(CMSCollector* collector, | |
158 MemRegion span, | |
159 ReferenceProcessor* rp, | |
160 CMSBitMap* bit_map, | |
161 CMSBitMap* mod_union_table, | |
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162 CMSMarkStack* mark_stack, |
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163 bool concurrent_precleaning); |
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164 virtual void do_oop(oop* p); |
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165 virtual void do_oop(narrowOop* p); |
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166 inline void do_oop_nv(oop* p) { PushAndMarkClosure::do_oop_work(p); } |
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167 inline void do_oop_nv(narrowOop* p) { PushAndMarkClosure::do_oop_work(p); } |
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168 |
0 | 169 Prefetch::style prefetch_style() { |
170 return Prefetch::do_read; | |
171 } | |
172 }; | |
173 | |
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174 // In the parallel case, the bit map and the |
0 | 175 // reference processor are currently all shared. Access to |
176 // these shared mutable structures must use appropriate | |
177 // synchronization (for instance, via CAS). The marking stack | |
178 // used in the non-parallel case above is here replaced with | |
179 // an OopTaskQueue structure to allow efficient work stealing. | |
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180 class Par_PushAndMarkClosure: public CMSOopClosure { |
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181 private: |
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182 CMSCollector* _collector; |
113
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183 MemRegion _span; |
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184 CMSBitMap* _bit_map; |
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185 OopTaskQueue* _work_queue; |
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186 protected: |
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187 DO_OOP_WORK_DEFN |
0 | 188 public: |
189 Par_PushAndMarkClosure(CMSCollector* collector, | |
190 MemRegion span, | |
191 ReferenceProcessor* rp, | |
192 CMSBitMap* bit_map, | |
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193 OopTaskQueue* work_queue); |
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194 virtual void do_oop(oop* p); |
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195 virtual void do_oop(narrowOop* p); |
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196 inline void do_oop_nv(oop* p) { Par_PushAndMarkClosure::do_oop_work(p); } |
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197 inline void do_oop_nv(narrowOop* p) { Par_PushAndMarkClosure::do_oop_work(p); } |
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198 |
0 | 199 Prefetch::style prefetch_style() { |
200 return Prefetch::do_read; | |
201 } | |
202 }; | |
203 | |
204 // The non-parallel version (the parallel version appears further below). | |
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205 class MarkRefsIntoAndScanClosure: public CMSOopsInGenClosure { |
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206 private: |
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207 MemRegion _span; |
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208 CMSBitMap* _bit_map; |
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209 CMSMarkStack* _mark_stack; |
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210 PushAndMarkClosure _pushAndMarkClosure; |
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211 CMSCollector* _collector; |
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212 Mutex* _freelistLock; |
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213 bool _yield; |
0 | 214 // Whether closure is being used for concurrent precleaning |
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215 bool _concurrent_precleaning; |
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216 protected: |
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217 DO_OOP_WORK_DEFN |
0 | 218 public: |
219 MarkRefsIntoAndScanClosure(MemRegion span, | |
220 ReferenceProcessor* rp, | |
221 CMSBitMap* bit_map, | |
222 CMSBitMap* mod_union_table, | |
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223 CMSMarkStack* mark_stack, |
0 | 224 CMSCollector* collector, |
225 bool should_yield, | |
226 bool concurrent_precleaning); | |
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227 virtual void do_oop(oop* p); |
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228 virtual void do_oop(narrowOop* p); |
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229 inline void do_oop_nv(oop* p) { MarkRefsIntoAndScanClosure::do_oop_work(p); } |
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230 inline void do_oop_nv(narrowOop* p) { MarkRefsIntoAndScanClosure::do_oop_work(p); } |
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231 |
0 | 232 Prefetch::style prefetch_style() { |
233 return Prefetch::do_read; | |
234 } | |
235 void set_freelistLock(Mutex* m) { | |
236 _freelistLock = m; | |
237 } | |
238 | |
239 private: | |
240 inline void do_yield_check(); | |
241 void do_yield_work(); | |
242 bool take_from_overflow_list(); | |
243 }; | |
244 | |
245 // Tn this, the parallel avatar of MarkRefsIntoAndScanClosure, the revisit | |
246 // stack and the bitMap are shared, so access needs to be suitably | |
247 // sycnhronized. An OopTaskQueue structure, supporting efficient | |
248 // workstealing, replaces a CMSMarkStack for storing grey objects. | |
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249 class Par_MarkRefsIntoAndScanClosure: public CMSOopsInGenClosure { |
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250 private: |
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251 MemRegion _span; |
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252 CMSBitMap* _bit_map; |
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253 OopTaskQueue* _work_queue; |
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254 const uint _low_water_mark; |
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255 Par_PushAndMarkClosure _par_pushAndMarkClosure; |
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256 protected: |
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257 DO_OOP_WORK_DEFN |
0 | 258 public: |
259 Par_MarkRefsIntoAndScanClosure(CMSCollector* collector, | |
260 MemRegion span, | |
261 ReferenceProcessor* rp, | |
262 CMSBitMap* bit_map, | |
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263 OopTaskQueue* work_queue); |
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264 virtual void do_oop(oop* p); |
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265 virtual void do_oop(narrowOop* p); |
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266 inline void do_oop_nv(oop* p) { Par_MarkRefsIntoAndScanClosure::do_oop_work(p); } |
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267 inline void do_oop_nv(narrowOop* p) { Par_MarkRefsIntoAndScanClosure::do_oop_work(p); } |
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268 |
0 | 269 Prefetch::style prefetch_style() { |
270 return Prefetch::do_read; | |
271 } | |
272 void trim_queue(uint size); | |
273 }; | |
274 | |
275 // This closure is used during the concurrent marking phase | |
276 // following the first checkpoint. Its use is buried in | |
277 // the closure MarkFromRootsClosure. | |
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278 class PushOrMarkClosure: public CMSOopClosure { |
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279 private: |
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280 CMSCollector* _collector; |
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281 MemRegion _span; |
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282 CMSBitMap* _bitMap; |
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283 CMSMarkStack* _markStack; |
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284 HeapWord* const _finger; |
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285 MarkFromRootsClosure* const |
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286 _parent; |
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287 protected: |
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288 DO_OOP_WORK_DEFN |
0 | 289 public: |
290 PushOrMarkClosure(CMSCollector* cms_collector, | |
291 MemRegion span, | |
292 CMSBitMap* bitMap, | |
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293 CMSMarkStack* markStack, |
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294 HeapWord* finger, |
0 | 295 MarkFromRootsClosure* parent); |
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296 virtual void do_oop(oop* p); |
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297 virtual void do_oop(narrowOop* p); |
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298 inline void do_oop_nv(oop* p) { PushOrMarkClosure::do_oop_work(p); } |
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299 inline void do_oop_nv(narrowOop* p) { PushOrMarkClosure::do_oop_work(p); } |
941 | 300 |
0 | 301 // Deal with a stack overflow condition |
302 void handle_stack_overflow(HeapWord* lost); | |
303 private: | |
304 inline void do_yield_check(); | |
305 }; | |
306 | |
307 // A parallel (MT) version of the above. | |
308 // This closure is used during the concurrent marking phase | |
309 // following the first checkpoint. Its use is buried in | |
310 // the closure Par_MarkFromRootsClosure. | |
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311 class Par_PushOrMarkClosure: public CMSOopClosure { |
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312 private: |
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313 CMSCollector* _collector; |
0 | 314 MemRegion _whole_span; |
315 MemRegion _span; // local chunk | |
316 CMSBitMap* _bit_map; | |
317 OopTaskQueue* _work_queue; | |
318 CMSMarkStack* _overflow_stack; | |
319 HeapWord* const _finger; | |
320 HeapWord** const _global_finger_addr; | |
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321 Par_MarkFromRootsClosure* const |
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322 _parent; |
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323 protected: |
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324 DO_OOP_WORK_DEFN |
0 | 325 public: |
326 Par_PushOrMarkClosure(CMSCollector* cms_collector, | |
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327 MemRegion span, |
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328 CMSBitMap* bit_map, |
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329 OopTaskQueue* work_queue, |
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330 CMSMarkStack* mark_stack, |
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331 HeapWord* finger, |
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332 HeapWord** global_finger_addr, |
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333 Par_MarkFromRootsClosure* parent); |
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334 virtual void do_oop(oop* p); |
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335 virtual void do_oop(narrowOop* p); |
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336 inline void do_oop_nv(oop* p) { Par_PushOrMarkClosure::do_oop_work(p); } |
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337 inline void do_oop_nv(narrowOop* p) { Par_PushOrMarkClosure::do_oop_work(p); } |
941 | 338 |
0 | 339 // Deal with a stack overflow condition |
340 void handle_stack_overflow(HeapWord* lost); | |
341 private: | |
342 inline void do_yield_check(); | |
343 }; | |
344 | |
345 // For objects in CMS generation, this closure marks | |
346 // given objects (transitively) as being reachable/live. | |
347 // This is currently used during the (weak) reference object | |
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348 // processing phase of the CMS final checkpoint step, as |
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349 // well as during the concurrent precleaning of the discovered |
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350 // reference lists. |
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351 class CMSKeepAliveClosure: public CMSOopClosure { |
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352 private: |
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353 CMSCollector* _collector; |
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354 const MemRegion _span; |
0 | 355 CMSMarkStack* _mark_stack; |
356 CMSBitMap* _bit_map; | |
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357 bool _concurrent_precleaning; |
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358 protected: |
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359 DO_OOP_WORK_DEFN |
0 | 360 public: |
361 CMSKeepAliveClosure(CMSCollector* collector, MemRegion span, | |
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362 CMSBitMap* bit_map, CMSMarkStack* mark_stack, |
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363 bool cpc); |
452
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364 bool concurrent_precleaning() const { return _concurrent_precleaning; } |
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365 virtual void do_oop(oop* p); |
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366 virtual void do_oop(narrowOop* p); |
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367 inline void do_oop_nv(oop* p) { CMSKeepAliveClosure::do_oop_work(p); } |
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368 inline void do_oop_nv(narrowOop* p) { CMSKeepAliveClosure::do_oop_work(p); } |
0 | 369 }; |
370 | |
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371 class CMSInnerParMarkAndPushClosure: public CMSOopClosure { |
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372 private: |
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373 CMSCollector* _collector; |
0 | 374 MemRegion _span; |
375 OopTaskQueue* _work_queue; | |
376 CMSBitMap* _bit_map; | |
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377 protected: |
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378 DO_OOP_WORK_DEFN |
0 | 379 public: |
380 CMSInnerParMarkAndPushClosure(CMSCollector* collector, | |
381 MemRegion span, CMSBitMap* bit_map, | |
935 | 382 OopTaskQueue* work_queue); |
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383 virtual void do_oop(oop* p); |
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384 virtual void do_oop(narrowOop* p); |
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385 inline void do_oop_nv(oop* p) { CMSInnerParMarkAndPushClosure::do_oop_work(p); } |
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386 inline void do_oop_nv(narrowOop* p) { CMSInnerParMarkAndPushClosure::do_oop_work(p); } |
0 | 387 }; |
388 | |
389 // A parallel (MT) version of the above, used when | |
390 // reference processing is parallel; the only difference | |
391 // is in the do_oop method. | |
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392 class CMSParKeepAliveClosure: public CMSOopClosure { |
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393 private: |
0 | 394 MemRegion _span; |
395 OopTaskQueue* _work_queue; | |
396 CMSBitMap* _bit_map; | |
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397 CMSInnerParMarkAndPushClosure |
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398 _mark_and_push; |
0 | 399 const uint _low_water_mark; |
400 void trim_queue(uint max); | |
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401 protected: |
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402 DO_OOP_WORK_DEFN |
0 | 403 public: |
404 CMSParKeepAliveClosure(CMSCollector* collector, MemRegion span, | |
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405 CMSBitMap* bit_map, OopTaskQueue* work_queue); |
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406 virtual void do_oop(oop* p); |
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407 virtual void do_oop(narrowOop* p); |
0 | 408 }; |
1972 | 409 |
410 #endif // SHARE_VM_GC_IMPLEMENTATION_CONCURRENTMARKSWEEP_CMSOOPCLOSURES_HPP |