Tue, 15 Sep 2009 21:53:47 -0700
6863023: need non-perm oops in code cache for JSR 292
Summary: Make a special root-list for those few nmethods which might contain non-perm oops.
Reviewed-by: twisti, kvn, never, jmasa, ysr
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); |
jrose@1424 | 56 | bool should_do_nmethods() { return _should_do_nmethods; } |
coleenp@548 | 57 | virtual void do_oop(oop* p); |
coleenp@548 | 58 | virtual void do_oop(narrowOop* p); |
coleenp@548 | 59 | inline void do_oop_nv(oop* p) { MarkRefsIntoClosure::do_oop_work(p); } |
coleenp@548 | 60 | inline void do_oop_nv(narrowOop* p) { MarkRefsIntoClosure::do_oop_work(p); } |
duke@435 | 61 | bool do_header() { return true; } |
duke@435 | 62 | Prefetch::style prefetch_style() { |
duke@435 | 63 | return Prefetch::do_read; |
duke@435 | 64 | } |
duke@435 | 65 | }; |
duke@435 | 66 | |
duke@435 | 67 | // A variant of the above used in certain kinds of CMS |
duke@435 | 68 | // marking verification. |
duke@435 | 69 | class MarkRefsIntoVerifyClosure: public OopsInGenClosure { |
coleenp@548 | 70 | private: |
coleenp@548 | 71 | const MemRegion _span; |
coleenp@548 | 72 | CMSBitMap* _verification_bm; |
coleenp@548 | 73 | CMSBitMap* _cms_bm; |
coleenp@548 | 74 | const bool _should_do_nmethods; |
coleenp@548 | 75 | protected: |
coleenp@548 | 76 | DO_OOP_WORK_DEFN |
duke@435 | 77 | public: |
duke@435 | 78 | MarkRefsIntoVerifyClosure(MemRegion span, CMSBitMap* verification_bm, |
duke@435 | 79 | CMSBitMap* cms_bm, bool should_do_nmethods); |
jrose@1424 | 80 | bool should_do_nmethods() { return _should_do_nmethods; } |
coleenp@548 | 81 | virtual void do_oop(oop* p); |
coleenp@548 | 82 | virtual void do_oop(narrowOop* p); |
coleenp@548 | 83 | inline void do_oop_nv(oop* p) { MarkRefsIntoVerifyClosure::do_oop_work(p); } |
coleenp@548 | 84 | inline void do_oop_nv(narrowOop* p) { MarkRefsIntoVerifyClosure::do_oop_work(p); } |
duke@435 | 85 | bool do_header() { return true; } |
duke@435 | 86 | Prefetch::style prefetch_style() { |
duke@435 | 87 | return Prefetch::do_read; |
duke@435 | 88 | } |
duke@435 | 89 | }; |
duke@435 | 90 | |
duke@435 | 91 | // The non-parallel version (the parallel version appears further below). |
duke@435 | 92 | class PushAndMarkClosure: public OopClosure { |
coleenp@548 | 93 | private: |
coleenp@548 | 94 | CMSCollector* _collector; |
coleenp@548 | 95 | MemRegion _span; |
coleenp@548 | 96 | CMSBitMap* _bit_map; |
coleenp@548 | 97 | CMSBitMap* _mod_union_table; |
coleenp@548 | 98 | CMSMarkStack* _mark_stack; |
coleenp@548 | 99 | CMSMarkStack* _revisit_stack; |
coleenp@548 | 100 | bool _concurrent_precleaning; |
coleenp@548 | 101 | bool const _should_remember_klasses; |
coleenp@548 | 102 | protected: |
coleenp@548 | 103 | DO_OOP_WORK_DEFN |
duke@435 | 104 | public: |
duke@435 | 105 | PushAndMarkClosure(CMSCollector* collector, |
duke@435 | 106 | MemRegion span, |
duke@435 | 107 | ReferenceProcessor* rp, |
duke@435 | 108 | CMSBitMap* bit_map, |
duke@435 | 109 | CMSBitMap* mod_union_table, |
coleenp@548 | 110 | CMSMarkStack* mark_stack, |
coleenp@548 | 111 | CMSMarkStack* revisit_stack, |
coleenp@548 | 112 | bool concurrent_precleaning); |
coleenp@548 | 113 | virtual void do_oop(oop* p); |
coleenp@548 | 114 | virtual void do_oop(narrowOop* p); |
coleenp@548 | 115 | inline void do_oop_nv(oop* p) { PushAndMarkClosure::do_oop_work(p); } |
coleenp@548 | 116 | inline void do_oop_nv(narrowOop* p) { PushAndMarkClosure::do_oop_work(p); } |
duke@435 | 117 | bool do_header() { return true; } |
duke@435 | 118 | Prefetch::style prefetch_style() { |
duke@435 | 119 | return Prefetch::do_read; |
duke@435 | 120 | } |
coleenp@548 | 121 | virtual const bool should_remember_klasses() const { |
duke@435 | 122 | return _should_remember_klasses; |
duke@435 | 123 | } |
coleenp@548 | 124 | virtual void remember_klass(Klass* k); |
duke@435 | 125 | }; |
duke@435 | 126 | |
duke@435 | 127 | // In the parallel case, the revisit stack, the bit map and the |
duke@435 | 128 | // reference processor are currently all shared. Access to |
duke@435 | 129 | // these shared mutable structures must use appropriate |
duke@435 | 130 | // synchronization (for instance, via CAS). The marking stack |
duke@435 | 131 | // used in the non-parallel case above is here replaced with |
duke@435 | 132 | // an OopTaskQueue structure to allow efficient work stealing. |
duke@435 | 133 | class Par_PushAndMarkClosure: public OopClosure { |
coleenp@548 | 134 | private: |
coleenp@548 | 135 | CMSCollector* _collector; |
coleenp@548 | 136 | MemRegion _span; |
coleenp@548 | 137 | CMSBitMap* _bit_map; |
coleenp@548 | 138 | OopTaskQueue* _work_queue; |
coleenp@548 | 139 | CMSMarkStack* _revisit_stack; |
coleenp@548 | 140 | bool const _should_remember_klasses; |
coleenp@548 | 141 | protected: |
coleenp@548 | 142 | DO_OOP_WORK_DEFN |
duke@435 | 143 | public: |
duke@435 | 144 | Par_PushAndMarkClosure(CMSCollector* collector, |
duke@435 | 145 | MemRegion span, |
duke@435 | 146 | ReferenceProcessor* rp, |
duke@435 | 147 | CMSBitMap* bit_map, |
duke@435 | 148 | OopTaskQueue* work_queue, |
duke@435 | 149 | CMSMarkStack* revisit_stack); |
coleenp@548 | 150 | virtual void do_oop(oop* p); |
coleenp@548 | 151 | virtual void do_oop(narrowOop* p); |
coleenp@548 | 152 | inline void do_oop_nv(oop* p) { Par_PushAndMarkClosure::do_oop_work(p); } |
coleenp@548 | 153 | inline void do_oop_nv(narrowOop* p) { Par_PushAndMarkClosure::do_oop_work(p); } |
duke@435 | 154 | bool do_header() { return true; } |
duke@435 | 155 | Prefetch::style prefetch_style() { |
duke@435 | 156 | return Prefetch::do_read; |
duke@435 | 157 | } |
coleenp@548 | 158 | virtual const bool should_remember_klasses() const { |
duke@435 | 159 | return _should_remember_klasses; |
duke@435 | 160 | } |
coleenp@548 | 161 | virtual void remember_klass(Klass* k); |
duke@435 | 162 | }; |
duke@435 | 163 | |
duke@435 | 164 | // The non-parallel version (the parallel version appears further below). |
duke@435 | 165 | class MarkRefsIntoAndScanClosure: public OopsInGenClosure { |
coleenp@548 | 166 | private: |
coleenp@548 | 167 | MemRegion _span; |
coleenp@548 | 168 | CMSBitMap* _bit_map; |
coleenp@548 | 169 | CMSMarkStack* _mark_stack; |
coleenp@548 | 170 | PushAndMarkClosure _pushAndMarkClosure; |
coleenp@548 | 171 | CMSCollector* _collector; |
coleenp@548 | 172 | Mutex* _freelistLock; |
coleenp@548 | 173 | bool _yield; |
duke@435 | 174 | // Whether closure is being used for concurrent precleaning |
coleenp@548 | 175 | bool _concurrent_precleaning; |
coleenp@548 | 176 | protected: |
coleenp@548 | 177 | DO_OOP_WORK_DEFN |
duke@435 | 178 | public: |
duke@435 | 179 | MarkRefsIntoAndScanClosure(MemRegion span, |
duke@435 | 180 | ReferenceProcessor* rp, |
duke@435 | 181 | CMSBitMap* bit_map, |
duke@435 | 182 | CMSBitMap* mod_union_table, |
coleenp@548 | 183 | CMSMarkStack* mark_stack, |
coleenp@548 | 184 | CMSMarkStack* revisit_stack, |
duke@435 | 185 | CMSCollector* collector, |
duke@435 | 186 | bool should_yield, |
duke@435 | 187 | bool concurrent_precleaning); |
coleenp@548 | 188 | virtual void do_oop(oop* p); |
coleenp@548 | 189 | virtual void do_oop(narrowOop* p); |
coleenp@548 | 190 | inline void do_oop_nv(oop* p) { MarkRefsIntoAndScanClosure::do_oop_work(p); } |
coleenp@548 | 191 | inline void do_oop_nv(narrowOop* p) { MarkRefsIntoAndScanClosure::do_oop_work(p); } |
duke@435 | 192 | bool do_header() { return true; } |
duke@435 | 193 | Prefetch::style prefetch_style() { |
duke@435 | 194 | return Prefetch::do_read; |
duke@435 | 195 | } |
duke@435 | 196 | void set_freelistLock(Mutex* m) { |
duke@435 | 197 | _freelistLock = m; |
duke@435 | 198 | } |
duke@435 | 199 | |
duke@435 | 200 | private: |
duke@435 | 201 | inline void do_yield_check(); |
duke@435 | 202 | void do_yield_work(); |
duke@435 | 203 | bool take_from_overflow_list(); |
duke@435 | 204 | }; |
duke@435 | 205 | |
duke@435 | 206 | // Tn this, the parallel avatar of MarkRefsIntoAndScanClosure, the revisit |
duke@435 | 207 | // stack and the bitMap are shared, so access needs to be suitably |
duke@435 | 208 | // sycnhronized. An OopTaskQueue structure, supporting efficient |
duke@435 | 209 | // workstealing, replaces a CMSMarkStack for storing grey objects. |
duke@435 | 210 | class Par_MarkRefsIntoAndScanClosure: public OopsInGenClosure { |
coleenp@548 | 211 | private: |
coleenp@548 | 212 | MemRegion _span; |
coleenp@548 | 213 | CMSBitMap* _bit_map; |
coleenp@548 | 214 | OopTaskQueue* _work_queue; |
coleenp@548 | 215 | const uint _low_water_mark; |
coleenp@548 | 216 | Par_PushAndMarkClosure _par_pushAndMarkClosure; |
coleenp@548 | 217 | protected: |
coleenp@548 | 218 | DO_OOP_WORK_DEFN |
duke@435 | 219 | public: |
duke@435 | 220 | Par_MarkRefsIntoAndScanClosure(CMSCollector* collector, |
duke@435 | 221 | MemRegion span, |
duke@435 | 222 | ReferenceProcessor* rp, |
duke@435 | 223 | CMSBitMap* bit_map, |
duke@435 | 224 | OopTaskQueue* work_queue, |
duke@435 | 225 | CMSMarkStack* revisit_stack); |
coleenp@548 | 226 | virtual void do_oop(oop* p); |
coleenp@548 | 227 | virtual void do_oop(narrowOop* p); |
coleenp@548 | 228 | inline void do_oop_nv(oop* p) { Par_MarkRefsIntoAndScanClosure::do_oop_work(p); } |
coleenp@548 | 229 | inline void do_oop_nv(narrowOop* p) { Par_MarkRefsIntoAndScanClosure::do_oop_work(p); } |
duke@435 | 230 | bool do_header() { return true; } |
duke@435 | 231 | virtual const bool do_nmethods() const { return true; } |
duke@435 | 232 | Prefetch::style prefetch_style() { |
duke@435 | 233 | return Prefetch::do_read; |
duke@435 | 234 | } |
duke@435 | 235 | void trim_queue(uint size); |
duke@435 | 236 | }; |
duke@435 | 237 | |
duke@435 | 238 | // This closure is used during the concurrent marking phase |
duke@435 | 239 | // following the first checkpoint. Its use is buried in |
duke@435 | 240 | // the closure MarkFromRootsClosure. |
duke@435 | 241 | class PushOrMarkClosure: public OopClosure { |
coleenp@548 | 242 | private: |
coleenp@548 | 243 | CMSCollector* _collector; |
coleenp@548 | 244 | MemRegion _span; |
coleenp@548 | 245 | CMSBitMap* _bitMap; |
coleenp@548 | 246 | CMSMarkStack* _markStack; |
coleenp@548 | 247 | CMSMarkStack* _revisitStack; |
coleenp@548 | 248 | HeapWord* const _finger; |
coleenp@548 | 249 | MarkFromRootsClosure* const |
coleenp@548 | 250 | _parent; |
coleenp@548 | 251 | bool const _should_remember_klasses; |
coleenp@548 | 252 | protected: |
coleenp@548 | 253 | DO_OOP_WORK_DEFN |
duke@435 | 254 | public: |
duke@435 | 255 | PushOrMarkClosure(CMSCollector* cms_collector, |
duke@435 | 256 | MemRegion span, |
duke@435 | 257 | CMSBitMap* bitMap, |
coleenp@548 | 258 | CMSMarkStack* markStack, |
coleenp@548 | 259 | CMSMarkStack* revisitStack, |
coleenp@548 | 260 | HeapWord* finger, |
duke@435 | 261 | MarkFromRootsClosure* parent); |
coleenp@548 | 262 | virtual void do_oop(oop* p); |
coleenp@548 | 263 | virtual void do_oop(narrowOop* p); |
coleenp@548 | 264 | inline void do_oop_nv(oop* p) { PushOrMarkClosure::do_oop_work(p); } |
coleenp@548 | 265 | inline void do_oop_nv(narrowOop* p) { PushOrMarkClosure::do_oop_work(p); } |
coleenp@548 | 266 | virtual const bool should_remember_klasses() const { |
duke@435 | 267 | return _should_remember_klasses; |
duke@435 | 268 | } |
coleenp@548 | 269 | virtual void remember_klass(Klass* k); |
duke@435 | 270 | // Deal with a stack overflow condition |
duke@435 | 271 | void handle_stack_overflow(HeapWord* lost); |
duke@435 | 272 | private: |
duke@435 | 273 | inline void do_yield_check(); |
duke@435 | 274 | }; |
duke@435 | 275 | |
duke@435 | 276 | // A parallel (MT) version of the above. |
duke@435 | 277 | // This closure is used during the concurrent marking phase |
duke@435 | 278 | // following the first checkpoint. Its use is buried in |
duke@435 | 279 | // the closure Par_MarkFromRootsClosure. |
duke@435 | 280 | class Par_PushOrMarkClosure: public OopClosure { |
coleenp@548 | 281 | private: |
duke@435 | 282 | CMSCollector* _collector; |
duke@435 | 283 | MemRegion _whole_span; |
duke@435 | 284 | MemRegion _span; // local chunk |
duke@435 | 285 | CMSBitMap* _bit_map; |
duke@435 | 286 | OopTaskQueue* _work_queue; |
duke@435 | 287 | CMSMarkStack* _overflow_stack; |
duke@435 | 288 | CMSMarkStack* _revisit_stack; |
duke@435 | 289 | HeapWord* const _finger; |
duke@435 | 290 | HeapWord** const _global_finger_addr; |
coleenp@548 | 291 | Par_MarkFromRootsClosure* const |
coleenp@548 | 292 | _parent; |
coleenp@548 | 293 | bool const _should_remember_klasses; |
coleenp@548 | 294 | protected: |
coleenp@548 | 295 | DO_OOP_WORK_DEFN |
duke@435 | 296 | public: |
duke@435 | 297 | Par_PushOrMarkClosure(CMSCollector* cms_collector, |
coleenp@548 | 298 | MemRegion span, |
coleenp@548 | 299 | CMSBitMap* bit_map, |
coleenp@548 | 300 | OopTaskQueue* work_queue, |
coleenp@548 | 301 | CMSMarkStack* mark_stack, |
coleenp@548 | 302 | CMSMarkStack* revisit_stack, |
coleenp@548 | 303 | HeapWord* finger, |
coleenp@548 | 304 | HeapWord** global_finger_addr, |
coleenp@548 | 305 | Par_MarkFromRootsClosure* parent); |
coleenp@548 | 306 | virtual void do_oop(oop* p); |
coleenp@548 | 307 | virtual void do_oop(narrowOop* p); |
coleenp@548 | 308 | inline void do_oop_nv(oop* p) { Par_PushOrMarkClosure::do_oop_work(p); } |
coleenp@548 | 309 | inline void do_oop_nv(narrowOop* p) { Par_PushOrMarkClosure::do_oop_work(p); } |
coleenp@548 | 310 | virtual const bool should_remember_klasses() const { |
duke@435 | 311 | return _should_remember_klasses; |
duke@435 | 312 | } |
coleenp@548 | 313 | virtual void remember_klass(Klass* k); |
duke@435 | 314 | // Deal with a stack overflow condition |
duke@435 | 315 | void handle_stack_overflow(HeapWord* lost); |
duke@435 | 316 | private: |
duke@435 | 317 | inline void do_yield_check(); |
duke@435 | 318 | }; |
duke@435 | 319 | |
duke@435 | 320 | // For objects in CMS generation, this closure marks |
duke@435 | 321 | // given objects (transitively) as being reachable/live. |
duke@435 | 322 | // This is currently used during the (weak) reference object |
ysr@887 | 323 | // processing phase of the CMS final checkpoint step, as |
ysr@887 | 324 | // well as during the concurrent precleaning of the discovered |
ysr@887 | 325 | // reference lists. |
duke@435 | 326 | class CMSKeepAliveClosure: public OopClosure { |
coleenp@548 | 327 | private: |
duke@435 | 328 | CMSCollector* _collector; |
ysr@578 | 329 | const MemRegion _span; |
duke@435 | 330 | CMSMarkStack* _mark_stack; |
duke@435 | 331 | CMSBitMap* _bit_map; |
ysr@887 | 332 | bool _concurrent_precleaning; |
coleenp@548 | 333 | protected: |
coleenp@548 | 334 | DO_OOP_WORK_DEFN |
duke@435 | 335 | public: |
duke@435 | 336 | CMSKeepAliveClosure(CMSCollector* collector, MemRegion span, |
ysr@887 | 337 | CMSBitMap* bit_map, CMSMarkStack* mark_stack, |
ysr@887 | 338 | bool cpc): |
duke@435 | 339 | _collector(collector), |
duke@435 | 340 | _span(span), |
duke@435 | 341 | _bit_map(bit_map), |
ysr@887 | 342 | _mark_stack(mark_stack), |
ysr@887 | 343 | _concurrent_precleaning(cpc) { |
ysr@578 | 344 | assert(!_span.is_empty(), "Empty span could spell trouble"); |
ysr@578 | 345 | } |
ysr@887 | 346 | bool concurrent_precleaning() const { return _concurrent_precleaning; } |
coleenp@548 | 347 | virtual void do_oop(oop* p); |
coleenp@548 | 348 | virtual void do_oop(narrowOop* p); |
coleenp@548 | 349 | inline void do_oop_nv(oop* p) { CMSKeepAliveClosure::do_oop_work(p); } |
coleenp@548 | 350 | inline void do_oop_nv(narrowOop* p) { CMSKeepAliveClosure::do_oop_work(p); } |
duke@435 | 351 | }; |
duke@435 | 352 | |
duke@435 | 353 | class CMSInnerParMarkAndPushClosure: public OopClosure { |
coleenp@548 | 354 | private: |
duke@435 | 355 | CMSCollector* _collector; |
duke@435 | 356 | MemRegion _span; |
duke@435 | 357 | OopTaskQueue* _work_queue; |
duke@435 | 358 | CMSBitMap* _bit_map; |
coleenp@548 | 359 | protected: |
coleenp@548 | 360 | DO_OOP_WORK_DEFN |
duke@435 | 361 | public: |
duke@435 | 362 | CMSInnerParMarkAndPushClosure(CMSCollector* collector, |
duke@435 | 363 | MemRegion span, CMSBitMap* bit_map, |
duke@435 | 364 | OopTaskQueue* work_queue): |
duke@435 | 365 | _collector(collector), |
duke@435 | 366 | _span(span), |
duke@435 | 367 | _bit_map(bit_map), |
duke@435 | 368 | _work_queue(work_queue) { } |
coleenp@548 | 369 | virtual void do_oop(oop* p); |
coleenp@548 | 370 | virtual void do_oop(narrowOop* p); |
coleenp@548 | 371 | inline void do_oop_nv(oop* p) { CMSInnerParMarkAndPushClosure::do_oop_work(p); } |
coleenp@548 | 372 | inline void do_oop_nv(narrowOop* p) { CMSInnerParMarkAndPushClosure::do_oop_work(p); } |
duke@435 | 373 | }; |
duke@435 | 374 | |
duke@435 | 375 | // A parallel (MT) version of the above, used when |
duke@435 | 376 | // reference processing is parallel; the only difference |
duke@435 | 377 | // is in the do_oop method. |
duke@435 | 378 | class CMSParKeepAliveClosure: public OopClosure { |
coleenp@548 | 379 | private: |
duke@435 | 380 | CMSCollector* _collector; |
duke@435 | 381 | MemRegion _span; |
duke@435 | 382 | OopTaskQueue* _work_queue; |
duke@435 | 383 | CMSBitMap* _bit_map; |
coleenp@548 | 384 | CMSInnerParMarkAndPushClosure |
coleenp@548 | 385 | _mark_and_push; |
duke@435 | 386 | const uint _low_water_mark; |
duke@435 | 387 | void trim_queue(uint max); |
coleenp@548 | 388 | protected: |
coleenp@548 | 389 | DO_OOP_WORK_DEFN |
duke@435 | 390 | public: |
duke@435 | 391 | CMSParKeepAliveClosure(CMSCollector* collector, MemRegion span, |
duke@435 | 392 | CMSBitMap* bit_map, OopTaskQueue* work_queue); |
coleenp@548 | 393 | virtual void do_oop(oop* p); |
coleenp@548 | 394 | virtual void do_oop(narrowOop* p); |
coleenp@548 | 395 | inline void do_oop_nv(oop* p) { CMSParKeepAliveClosure::do_oop_work(p); } |
coleenp@548 | 396 | inline void do_oop_nv(narrowOop* p) { CMSParKeepAliveClosure::do_oop_work(p); } |
duke@435 | 397 | }; |