Sun, 13 Apr 2008 17:43:42 -0400
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
Summary: Compressed oops in instances, arrays, and headers. Code contributors are coleenp, phh, never, swamyv
Reviewed-by: jmasa, kamg, acorn, tbell, kvn, rasbold
duke@435 | 1 | /* |
duke@435 | 2 | * Copyright (c) 2007 Sun Microsystems, Inc. All Rights Reserved. |
duke@435 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
duke@435 | 4 | * |
duke@435 | 5 | * This code is free software; you can redistribute it and/or modify it |
duke@435 | 6 | * under the terms of the GNU General Public License version 2 only, as |
duke@435 | 7 | * published by the Free Software Foundation. |
duke@435 | 8 | * |
duke@435 | 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
duke@435 | 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
duke@435 | 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
duke@435 | 12 | * version 2 for more details (a copy is included in the LICENSE file that |
duke@435 | 13 | * accompanied this code). |
duke@435 | 14 | * |
duke@435 | 15 | * You should have received a copy of the GNU General Public License version |
duke@435 | 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
duke@435 | 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
duke@435 | 18 | * |
duke@435 | 19 | * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
duke@435 | 20 | * CA 95054 USA or visit www.sun.com if you need additional information or |
duke@435 | 21 | * have any questions. |
duke@435 | 22 | * |
duke@435 | 23 | */ |
duke@435 | 24 | |
duke@435 | 25 | ///////////////////////////////////////////////////////////////// |
duke@435 | 26 | // Closures used by ConcurrentMarkSweepGeneration's collector |
duke@435 | 27 | ///////////////////////////////////////////////////////////////// |
duke@435 | 28 | class ConcurrentMarkSweepGeneration; |
duke@435 | 29 | class CMSBitMap; |
duke@435 | 30 | class CMSMarkStack; |
duke@435 | 31 | class CMSCollector; |
duke@435 | 32 | class MarkFromRootsClosure; |
duke@435 | 33 | class Par_MarkFromRootsClosure; |
duke@435 | 34 | |
coleenp@548 | 35 | // Decode the oop and call do_oop on it. |
coleenp@548 | 36 | #define DO_OOP_WORK_DEFN \ |
coleenp@548 | 37 | void do_oop(oop obj); \ |
coleenp@548 | 38 | template <class T> inline void do_oop_work(T* p) { \ |
coleenp@548 | 39 | T heap_oop = oopDesc::load_heap_oop(p); \ |
coleenp@548 | 40 | if (!oopDesc::is_null(heap_oop)) { \ |
coleenp@548 | 41 | oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); \ |
coleenp@548 | 42 | do_oop(obj); \ |
coleenp@548 | 43 | } \ |
coleenp@548 | 44 | } |
coleenp@548 | 45 | |
duke@435 | 46 | class MarkRefsIntoClosure: public OopsInGenClosure { |
coleenp@548 | 47 | private: |
coleenp@548 | 48 | const MemRegion _span; |
coleenp@548 | 49 | CMSBitMap* _bitMap; |
coleenp@548 | 50 | const bool _should_do_nmethods; |
coleenp@548 | 51 | protected: |
coleenp@548 | 52 | DO_OOP_WORK_DEFN |
duke@435 | 53 | public: |
duke@435 | 54 | MarkRefsIntoClosure(MemRegion span, CMSBitMap* bitMap, |
duke@435 | 55 | bool should_do_nmethods); |
coleenp@548 | 56 | virtual void do_oop(oop* p); |
coleenp@548 | 57 | virtual void do_oop(narrowOop* p); |
coleenp@548 | 58 | inline void do_oop_nv(oop* p) { MarkRefsIntoClosure::do_oop_work(p); } |
coleenp@548 | 59 | inline void do_oop_nv(narrowOop* p) { MarkRefsIntoClosure::do_oop_work(p); } |
duke@435 | 60 | bool do_header() { return true; } |
duke@435 | 61 | virtual const bool do_nmethods() const { |
duke@435 | 62 | return _should_do_nmethods; |
duke@435 | 63 | } |
duke@435 | 64 | Prefetch::style prefetch_style() { |
duke@435 | 65 | return Prefetch::do_read; |
duke@435 | 66 | } |
duke@435 | 67 | }; |
duke@435 | 68 | |
duke@435 | 69 | // A variant of the above used in certain kinds of CMS |
duke@435 | 70 | // marking verification. |
duke@435 | 71 | class MarkRefsIntoVerifyClosure: public OopsInGenClosure { |
coleenp@548 | 72 | private: |
coleenp@548 | 73 | const MemRegion _span; |
coleenp@548 | 74 | CMSBitMap* _verification_bm; |
coleenp@548 | 75 | CMSBitMap* _cms_bm; |
coleenp@548 | 76 | const bool _should_do_nmethods; |
coleenp@548 | 77 | protected: |
coleenp@548 | 78 | DO_OOP_WORK_DEFN |
duke@435 | 79 | public: |
duke@435 | 80 | MarkRefsIntoVerifyClosure(MemRegion span, CMSBitMap* verification_bm, |
duke@435 | 81 | CMSBitMap* cms_bm, bool should_do_nmethods); |
coleenp@548 | 82 | virtual void do_oop(oop* p); |
coleenp@548 | 83 | virtual void do_oop(narrowOop* p); |
coleenp@548 | 84 | inline void do_oop_nv(oop* p) { MarkRefsIntoVerifyClosure::do_oop_work(p); } |
coleenp@548 | 85 | inline void do_oop_nv(narrowOop* p) { MarkRefsIntoVerifyClosure::do_oop_work(p); } |
duke@435 | 86 | bool do_header() { return true; } |
duke@435 | 87 | virtual const bool do_nmethods() const { |
duke@435 | 88 | return _should_do_nmethods; |
duke@435 | 89 | } |
duke@435 | 90 | Prefetch::style prefetch_style() { |
duke@435 | 91 | return Prefetch::do_read; |
duke@435 | 92 | } |
duke@435 | 93 | }; |
duke@435 | 94 | |
duke@435 | 95 | // The non-parallel version (the parallel version appears further below). |
duke@435 | 96 | class PushAndMarkClosure: public OopClosure { |
coleenp@548 | 97 | private: |
coleenp@548 | 98 | CMSCollector* _collector; |
coleenp@548 | 99 | MemRegion _span; |
coleenp@548 | 100 | CMSBitMap* _bit_map; |
coleenp@548 | 101 | CMSBitMap* _mod_union_table; |
coleenp@548 | 102 | CMSMarkStack* _mark_stack; |
coleenp@548 | 103 | CMSMarkStack* _revisit_stack; |
coleenp@548 | 104 | bool _concurrent_precleaning; |
coleenp@548 | 105 | bool const _should_remember_klasses; |
coleenp@548 | 106 | protected: |
coleenp@548 | 107 | DO_OOP_WORK_DEFN |
duke@435 | 108 | public: |
duke@435 | 109 | PushAndMarkClosure(CMSCollector* collector, |
duke@435 | 110 | MemRegion span, |
duke@435 | 111 | ReferenceProcessor* rp, |
duke@435 | 112 | CMSBitMap* bit_map, |
duke@435 | 113 | CMSBitMap* mod_union_table, |
coleenp@548 | 114 | CMSMarkStack* mark_stack, |
coleenp@548 | 115 | CMSMarkStack* revisit_stack, |
coleenp@548 | 116 | bool concurrent_precleaning); |
coleenp@548 | 117 | virtual void do_oop(oop* p); |
coleenp@548 | 118 | virtual void do_oop(narrowOop* p); |
coleenp@548 | 119 | inline void do_oop_nv(oop* p) { PushAndMarkClosure::do_oop_work(p); } |
coleenp@548 | 120 | inline void do_oop_nv(narrowOop* p) { PushAndMarkClosure::do_oop_work(p); } |
duke@435 | 121 | bool do_header() { return true; } |
duke@435 | 122 | Prefetch::style prefetch_style() { |
duke@435 | 123 | return Prefetch::do_read; |
duke@435 | 124 | } |
coleenp@548 | 125 | virtual const bool should_remember_klasses() const { |
duke@435 | 126 | return _should_remember_klasses; |
duke@435 | 127 | } |
coleenp@548 | 128 | virtual void remember_klass(Klass* k); |
duke@435 | 129 | }; |
duke@435 | 130 | |
duke@435 | 131 | // In the parallel case, the revisit stack, the bit map and the |
duke@435 | 132 | // reference processor are currently all shared. Access to |
duke@435 | 133 | // these shared mutable structures must use appropriate |
duke@435 | 134 | // synchronization (for instance, via CAS). The marking stack |
duke@435 | 135 | // used in the non-parallel case above is here replaced with |
duke@435 | 136 | // an OopTaskQueue structure to allow efficient work stealing. |
duke@435 | 137 | class Par_PushAndMarkClosure: public OopClosure { |
coleenp@548 | 138 | private: |
coleenp@548 | 139 | CMSCollector* _collector; |
coleenp@548 | 140 | MemRegion _span; |
coleenp@548 | 141 | CMSBitMap* _bit_map; |
coleenp@548 | 142 | OopTaskQueue* _work_queue; |
coleenp@548 | 143 | CMSMarkStack* _revisit_stack; |
coleenp@548 | 144 | bool const _should_remember_klasses; |
coleenp@548 | 145 | protected: |
coleenp@548 | 146 | DO_OOP_WORK_DEFN |
duke@435 | 147 | public: |
duke@435 | 148 | Par_PushAndMarkClosure(CMSCollector* collector, |
duke@435 | 149 | MemRegion span, |
duke@435 | 150 | ReferenceProcessor* rp, |
duke@435 | 151 | CMSBitMap* bit_map, |
duke@435 | 152 | OopTaskQueue* work_queue, |
duke@435 | 153 | CMSMarkStack* revisit_stack); |
coleenp@548 | 154 | virtual void do_oop(oop* p); |
coleenp@548 | 155 | virtual void do_oop(narrowOop* p); |
coleenp@548 | 156 | inline void do_oop_nv(oop* p) { Par_PushAndMarkClosure::do_oop_work(p); } |
coleenp@548 | 157 | inline void do_oop_nv(narrowOop* p) { Par_PushAndMarkClosure::do_oop_work(p); } |
duke@435 | 158 | bool do_header() { return true; } |
duke@435 | 159 | Prefetch::style prefetch_style() { |
duke@435 | 160 | return Prefetch::do_read; |
duke@435 | 161 | } |
coleenp@548 | 162 | virtual const bool should_remember_klasses() const { |
duke@435 | 163 | return _should_remember_klasses; |
duke@435 | 164 | } |
coleenp@548 | 165 | virtual void remember_klass(Klass* k); |
duke@435 | 166 | }; |
duke@435 | 167 | |
duke@435 | 168 | // The non-parallel version (the parallel version appears further below). |
duke@435 | 169 | class MarkRefsIntoAndScanClosure: public OopsInGenClosure { |
coleenp@548 | 170 | private: |
coleenp@548 | 171 | MemRegion _span; |
coleenp@548 | 172 | CMSBitMap* _bit_map; |
coleenp@548 | 173 | CMSMarkStack* _mark_stack; |
coleenp@548 | 174 | PushAndMarkClosure _pushAndMarkClosure; |
coleenp@548 | 175 | CMSCollector* _collector; |
coleenp@548 | 176 | Mutex* _freelistLock; |
coleenp@548 | 177 | bool _yield; |
duke@435 | 178 | // Whether closure is being used for concurrent precleaning |
coleenp@548 | 179 | bool _concurrent_precleaning; |
coleenp@548 | 180 | protected: |
coleenp@548 | 181 | DO_OOP_WORK_DEFN |
duke@435 | 182 | public: |
duke@435 | 183 | MarkRefsIntoAndScanClosure(MemRegion span, |
duke@435 | 184 | ReferenceProcessor* rp, |
duke@435 | 185 | CMSBitMap* bit_map, |
duke@435 | 186 | CMSBitMap* mod_union_table, |
coleenp@548 | 187 | CMSMarkStack* mark_stack, |
coleenp@548 | 188 | CMSMarkStack* revisit_stack, |
duke@435 | 189 | CMSCollector* collector, |
duke@435 | 190 | bool should_yield, |
duke@435 | 191 | bool concurrent_precleaning); |
coleenp@548 | 192 | virtual void do_oop(oop* p); |
coleenp@548 | 193 | virtual void do_oop(narrowOop* p); |
coleenp@548 | 194 | inline void do_oop_nv(oop* p) { MarkRefsIntoAndScanClosure::do_oop_work(p); } |
coleenp@548 | 195 | inline void do_oop_nv(narrowOop* p) { MarkRefsIntoAndScanClosure::do_oop_work(p); } |
duke@435 | 196 | bool do_header() { return true; } |
duke@435 | 197 | virtual const bool do_nmethods() const { return true; } |
duke@435 | 198 | Prefetch::style prefetch_style() { |
duke@435 | 199 | return Prefetch::do_read; |
duke@435 | 200 | } |
duke@435 | 201 | void set_freelistLock(Mutex* m) { |
duke@435 | 202 | _freelistLock = m; |
duke@435 | 203 | } |
duke@435 | 204 | |
duke@435 | 205 | private: |
duke@435 | 206 | inline void do_yield_check(); |
duke@435 | 207 | void do_yield_work(); |
duke@435 | 208 | bool take_from_overflow_list(); |
duke@435 | 209 | }; |
duke@435 | 210 | |
duke@435 | 211 | // Tn this, the parallel avatar of MarkRefsIntoAndScanClosure, the revisit |
duke@435 | 212 | // stack and the bitMap are shared, so access needs to be suitably |
duke@435 | 213 | // sycnhronized. An OopTaskQueue structure, supporting efficient |
duke@435 | 214 | // workstealing, replaces a CMSMarkStack for storing grey objects. |
duke@435 | 215 | class Par_MarkRefsIntoAndScanClosure: public OopsInGenClosure { |
coleenp@548 | 216 | private: |
coleenp@548 | 217 | MemRegion _span; |
coleenp@548 | 218 | CMSBitMap* _bit_map; |
coleenp@548 | 219 | OopTaskQueue* _work_queue; |
coleenp@548 | 220 | const uint _low_water_mark; |
coleenp@548 | 221 | Par_PushAndMarkClosure _par_pushAndMarkClosure; |
coleenp@548 | 222 | protected: |
coleenp@548 | 223 | DO_OOP_WORK_DEFN |
duke@435 | 224 | public: |
duke@435 | 225 | Par_MarkRefsIntoAndScanClosure(CMSCollector* collector, |
duke@435 | 226 | MemRegion span, |
duke@435 | 227 | ReferenceProcessor* rp, |
duke@435 | 228 | CMSBitMap* bit_map, |
duke@435 | 229 | OopTaskQueue* work_queue, |
duke@435 | 230 | CMSMarkStack* revisit_stack); |
coleenp@548 | 231 | virtual void do_oop(oop* p); |
coleenp@548 | 232 | virtual void do_oop(narrowOop* p); |
coleenp@548 | 233 | inline void do_oop_nv(oop* p) { Par_MarkRefsIntoAndScanClosure::do_oop_work(p); } |
coleenp@548 | 234 | inline void do_oop_nv(narrowOop* p) { Par_MarkRefsIntoAndScanClosure::do_oop_work(p); } |
duke@435 | 235 | bool do_header() { return true; } |
duke@435 | 236 | virtual const bool do_nmethods() const { return true; } |
duke@435 | 237 | Prefetch::style prefetch_style() { |
duke@435 | 238 | return Prefetch::do_read; |
duke@435 | 239 | } |
duke@435 | 240 | void trim_queue(uint size); |
duke@435 | 241 | }; |
duke@435 | 242 | |
duke@435 | 243 | // This closure is used during the concurrent marking phase |
duke@435 | 244 | // following the first checkpoint. Its use is buried in |
duke@435 | 245 | // the closure MarkFromRootsClosure. |
duke@435 | 246 | class PushOrMarkClosure: public OopClosure { |
coleenp@548 | 247 | private: |
coleenp@548 | 248 | CMSCollector* _collector; |
coleenp@548 | 249 | MemRegion _span; |
coleenp@548 | 250 | CMSBitMap* _bitMap; |
coleenp@548 | 251 | CMSMarkStack* _markStack; |
coleenp@548 | 252 | CMSMarkStack* _revisitStack; |
coleenp@548 | 253 | HeapWord* const _finger; |
coleenp@548 | 254 | MarkFromRootsClosure* const |
coleenp@548 | 255 | _parent; |
coleenp@548 | 256 | bool const _should_remember_klasses; |
coleenp@548 | 257 | protected: |
coleenp@548 | 258 | DO_OOP_WORK_DEFN |
duke@435 | 259 | public: |
duke@435 | 260 | PushOrMarkClosure(CMSCollector* cms_collector, |
duke@435 | 261 | MemRegion span, |
duke@435 | 262 | CMSBitMap* bitMap, |
coleenp@548 | 263 | CMSMarkStack* markStack, |
coleenp@548 | 264 | CMSMarkStack* revisitStack, |
coleenp@548 | 265 | HeapWord* finger, |
duke@435 | 266 | MarkFromRootsClosure* parent); |
coleenp@548 | 267 | virtual void do_oop(oop* p); |
coleenp@548 | 268 | virtual void do_oop(narrowOop* p); |
coleenp@548 | 269 | inline void do_oop_nv(oop* p) { PushOrMarkClosure::do_oop_work(p); } |
coleenp@548 | 270 | inline void do_oop_nv(narrowOop* p) { PushOrMarkClosure::do_oop_work(p); } |
coleenp@548 | 271 | virtual const bool should_remember_klasses() const { |
duke@435 | 272 | return _should_remember_klasses; |
duke@435 | 273 | } |
coleenp@548 | 274 | virtual void remember_klass(Klass* k); |
duke@435 | 275 | // Deal with a stack overflow condition |
duke@435 | 276 | void handle_stack_overflow(HeapWord* lost); |
duke@435 | 277 | private: |
duke@435 | 278 | inline void do_yield_check(); |
duke@435 | 279 | }; |
duke@435 | 280 | |
duke@435 | 281 | // A parallel (MT) version of the above. |
duke@435 | 282 | // This closure is used during the concurrent marking phase |
duke@435 | 283 | // following the first checkpoint. Its use is buried in |
duke@435 | 284 | // the closure Par_MarkFromRootsClosure. |
duke@435 | 285 | class Par_PushOrMarkClosure: public OopClosure { |
coleenp@548 | 286 | private: |
duke@435 | 287 | CMSCollector* _collector; |
duke@435 | 288 | MemRegion _whole_span; |
duke@435 | 289 | MemRegion _span; // local chunk |
duke@435 | 290 | CMSBitMap* _bit_map; |
duke@435 | 291 | OopTaskQueue* _work_queue; |
duke@435 | 292 | CMSMarkStack* _overflow_stack; |
duke@435 | 293 | CMSMarkStack* _revisit_stack; |
duke@435 | 294 | HeapWord* const _finger; |
duke@435 | 295 | HeapWord** const _global_finger_addr; |
coleenp@548 | 296 | Par_MarkFromRootsClosure* const |
coleenp@548 | 297 | _parent; |
coleenp@548 | 298 | bool const _should_remember_klasses; |
coleenp@548 | 299 | protected: |
coleenp@548 | 300 | DO_OOP_WORK_DEFN |
duke@435 | 301 | public: |
duke@435 | 302 | Par_PushOrMarkClosure(CMSCollector* cms_collector, |
coleenp@548 | 303 | MemRegion span, |
coleenp@548 | 304 | CMSBitMap* bit_map, |
coleenp@548 | 305 | OopTaskQueue* work_queue, |
coleenp@548 | 306 | CMSMarkStack* mark_stack, |
coleenp@548 | 307 | CMSMarkStack* revisit_stack, |
coleenp@548 | 308 | HeapWord* finger, |
coleenp@548 | 309 | HeapWord** global_finger_addr, |
coleenp@548 | 310 | Par_MarkFromRootsClosure* parent); |
coleenp@548 | 311 | virtual void do_oop(oop* p); |
coleenp@548 | 312 | virtual void do_oop(narrowOop* p); |
coleenp@548 | 313 | inline void do_oop_nv(oop* p) { Par_PushOrMarkClosure::do_oop_work(p); } |
coleenp@548 | 314 | inline void do_oop_nv(narrowOop* p) { Par_PushOrMarkClosure::do_oop_work(p); } |
coleenp@548 | 315 | virtual const bool should_remember_klasses() const { |
duke@435 | 316 | return _should_remember_klasses; |
duke@435 | 317 | } |
coleenp@548 | 318 | virtual void remember_klass(Klass* k); |
duke@435 | 319 | // Deal with a stack overflow condition |
duke@435 | 320 | void handle_stack_overflow(HeapWord* lost); |
duke@435 | 321 | private: |
duke@435 | 322 | inline void do_yield_check(); |
duke@435 | 323 | }; |
duke@435 | 324 | |
duke@435 | 325 | // For objects in CMS generation, this closure marks |
duke@435 | 326 | // given objects (transitively) as being reachable/live. |
duke@435 | 327 | // This is currently used during the (weak) reference object |
duke@435 | 328 | // processing phase of the CMS final checkpoint step. |
duke@435 | 329 | class CMSKeepAliveClosure: public OopClosure { |
coleenp@548 | 330 | private: |
duke@435 | 331 | CMSCollector* _collector; |
duke@435 | 332 | MemRegion _span; |
duke@435 | 333 | CMSMarkStack* _mark_stack; |
duke@435 | 334 | CMSBitMap* _bit_map; |
coleenp@548 | 335 | protected: |
coleenp@548 | 336 | DO_OOP_WORK_DEFN |
duke@435 | 337 | public: |
duke@435 | 338 | CMSKeepAliveClosure(CMSCollector* collector, MemRegion span, |
duke@435 | 339 | CMSBitMap* bit_map, CMSMarkStack* mark_stack): |
duke@435 | 340 | _collector(collector), |
duke@435 | 341 | _span(span), |
duke@435 | 342 | _bit_map(bit_map), |
duke@435 | 343 | _mark_stack(mark_stack) { } |
coleenp@548 | 344 | virtual void do_oop(oop* p); |
coleenp@548 | 345 | virtual void do_oop(narrowOop* p); |
coleenp@548 | 346 | inline void do_oop_nv(oop* p) { CMSKeepAliveClosure::do_oop_work(p); } |
coleenp@548 | 347 | inline void do_oop_nv(narrowOop* p) { CMSKeepAliveClosure::do_oop_work(p); } |
duke@435 | 348 | }; |
duke@435 | 349 | |
duke@435 | 350 | class CMSInnerParMarkAndPushClosure: public OopClosure { |
coleenp@548 | 351 | private: |
duke@435 | 352 | CMSCollector* _collector; |
duke@435 | 353 | MemRegion _span; |
duke@435 | 354 | OopTaskQueue* _work_queue; |
duke@435 | 355 | CMSBitMap* _bit_map; |
coleenp@548 | 356 | protected: |
coleenp@548 | 357 | DO_OOP_WORK_DEFN |
duke@435 | 358 | public: |
duke@435 | 359 | CMSInnerParMarkAndPushClosure(CMSCollector* collector, |
duke@435 | 360 | MemRegion span, CMSBitMap* bit_map, |
duke@435 | 361 | OopTaskQueue* work_queue): |
duke@435 | 362 | _collector(collector), |
duke@435 | 363 | _span(span), |
duke@435 | 364 | _bit_map(bit_map), |
duke@435 | 365 | _work_queue(work_queue) { } |
coleenp@548 | 366 | virtual void do_oop(oop* p); |
coleenp@548 | 367 | virtual void do_oop(narrowOop* p); |
coleenp@548 | 368 | inline void do_oop_nv(oop* p) { CMSInnerParMarkAndPushClosure::do_oop_work(p); } |
coleenp@548 | 369 | inline void do_oop_nv(narrowOop* p) { CMSInnerParMarkAndPushClosure::do_oop_work(p); } |
duke@435 | 370 | }; |
duke@435 | 371 | |
duke@435 | 372 | // A parallel (MT) version of the above, used when |
duke@435 | 373 | // reference processing is parallel; the only difference |
duke@435 | 374 | // is in the do_oop method. |
duke@435 | 375 | class CMSParKeepAliveClosure: public OopClosure { |
coleenp@548 | 376 | private: |
duke@435 | 377 | CMSCollector* _collector; |
duke@435 | 378 | MemRegion _span; |
duke@435 | 379 | OopTaskQueue* _work_queue; |
duke@435 | 380 | CMSBitMap* _bit_map; |
coleenp@548 | 381 | CMSInnerParMarkAndPushClosure |
coleenp@548 | 382 | _mark_and_push; |
duke@435 | 383 | const uint _low_water_mark; |
duke@435 | 384 | void trim_queue(uint max); |
coleenp@548 | 385 | protected: |
coleenp@548 | 386 | DO_OOP_WORK_DEFN |
duke@435 | 387 | public: |
duke@435 | 388 | CMSParKeepAliveClosure(CMSCollector* collector, MemRegion span, |
duke@435 | 389 | CMSBitMap* bit_map, OopTaskQueue* work_queue); |
coleenp@548 | 390 | virtual void do_oop(oop* p); |
coleenp@548 | 391 | virtual void do_oop(narrowOop* p); |
coleenp@548 | 392 | inline void do_oop_nv(oop* p) { CMSParKeepAliveClosure::do_oop_work(p); } |
coleenp@548 | 393 | inline void do_oop_nv(narrowOop* p) { CMSParKeepAliveClosure::do_oop_work(p); } |
duke@435 | 394 | }; |