Wed, 01 Dec 2010 15:04:06 +0100
7003125: precompiled.hpp is included when precompiled headers are not used
Summary: Added an ifndef DONT_USE_PRECOMPILED_HEADER to precompiled.hpp. Set up DONT_USE_PRECOMPILED_HEADER when compiling with Sun Studio or when the user specifies USE_PRECOMPILED_HEADER=0. Fixed broken include dependencies.
Reviewed-by: coleenp, kvn
duke@435 | 1 | /* |
stefank@2314 | 2 | * Copyright (c) 2005, 2010, Oracle and/or its affiliates. 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 | * |
trims@1907 | 19 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
trims@1907 | 20 | * or visit www.oracle.com if you need additional information or have any |
trims@1907 | 21 | * questions. |
duke@435 | 22 | * |
duke@435 | 23 | */ |
duke@435 | 24 | |
stefank@2314 | 25 | #ifndef SHARE_VM_GC_IMPLEMENTATION_PARALLELSCAVENGE_PARMARKBITMAP_HPP |
stefank@2314 | 26 | #define SHARE_VM_GC_IMPLEMENTATION_PARALLELSCAVENGE_PARMARKBITMAP_HPP |
stefank@2314 | 27 | |
stefank@2325 | 28 | #include "memory/memRegion.hpp" |
stefank@2314 | 29 | #include "gc_implementation/parallelScavenge/psVirtualspace.hpp" |
stefank@2314 | 30 | #include "utilities/bitMap.inline.hpp" |
stefank@2314 | 31 | |
duke@435 | 32 | class oopDesc; |
duke@435 | 33 | class ParMarkBitMapClosure; |
duke@435 | 34 | |
duke@435 | 35 | class ParMarkBitMap: public CHeapObj |
duke@435 | 36 | { |
duke@435 | 37 | public: |
duke@435 | 38 | typedef BitMap::idx_t idx_t; |
duke@435 | 39 | |
duke@435 | 40 | // Values returned by the iterate() methods. |
duke@435 | 41 | enum IterationStatus { incomplete, complete, full, would_overflow }; |
duke@435 | 42 | |
duke@435 | 43 | inline ParMarkBitMap(); |
duke@435 | 44 | inline ParMarkBitMap(MemRegion covered_region); |
duke@435 | 45 | bool initialize(MemRegion covered_region); |
duke@435 | 46 | |
duke@435 | 47 | // Atomically mark an object as live. |
duke@435 | 48 | bool mark_obj(HeapWord* addr, size_t size); |
duke@435 | 49 | inline bool mark_obj(oop obj, int size); |
duke@435 | 50 | inline bool mark_obj(oop obj); |
duke@435 | 51 | |
duke@435 | 52 | // Return whether the specified begin or end bit is set. |
duke@435 | 53 | inline bool is_obj_beg(idx_t bit) const; |
duke@435 | 54 | inline bool is_obj_end(idx_t bit) const; |
duke@435 | 55 | |
duke@435 | 56 | // Traditional interface for testing whether an object is marked or not (these |
duke@435 | 57 | // test only the begin bits). |
duke@435 | 58 | inline bool is_marked(idx_t bit) const; |
duke@435 | 59 | inline bool is_marked(HeapWord* addr) const; |
duke@435 | 60 | inline bool is_marked(oop obj) const; |
duke@435 | 61 | |
duke@435 | 62 | inline bool is_unmarked(idx_t bit) const; |
duke@435 | 63 | inline bool is_unmarked(HeapWord* addr) const; |
duke@435 | 64 | inline bool is_unmarked(oop obj) const; |
duke@435 | 65 | |
duke@435 | 66 | // Convert sizes from bits to HeapWords and back. An object that is n bits |
duke@435 | 67 | // long will be bits_to_words(n) words long. An object that is m words long |
duke@435 | 68 | // will take up words_to_bits(m) bits in the bitmap. |
duke@435 | 69 | inline static size_t bits_to_words(idx_t bits); |
duke@435 | 70 | inline static idx_t words_to_bits(size_t words); |
duke@435 | 71 | |
duke@435 | 72 | // Return the size in words of an object given a begin bit and an end bit, or |
duke@435 | 73 | // the equivalent beg_addr and end_addr. |
duke@435 | 74 | inline size_t obj_size(idx_t beg_bit, idx_t end_bit) const; |
duke@435 | 75 | inline size_t obj_size(HeapWord* beg_addr, HeapWord* end_addr) const; |
duke@435 | 76 | |
duke@435 | 77 | // Return the size in words of the object (a search is done for the end bit). |
duke@435 | 78 | inline size_t obj_size(idx_t beg_bit) const; |
duke@435 | 79 | inline size_t obj_size(HeapWord* addr) const; |
duke@435 | 80 | inline size_t obj_size(oop obj) const; |
duke@435 | 81 | |
duke@435 | 82 | // Synonyms for the above. |
duke@435 | 83 | size_t obj_size_in_words(oop obj) const { return obj_size((HeapWord*)obj); } |
duke@435 | 84 | size_t obj_size_in_words(HeapWord* addr) const { return obj_size(addr); } |
duke@435 | 85 | |
duke@435 | 86 | // Apply live_closure to each live object that lies completely within the |
duke@435 | 87 | // range [live_range_beg, live_range_end). This is used to iterate over the |
duke@435 | 88 | // compacted region of the heap. Return values: |
duke@435 | 89 | // |
duke@435 | 90 | // incomplete The iteration is not complete. The last object that |
duke@435 | 91 | // begins in the range does not end in the range; |
duke@435 | 92 | // closure->source() is set to the start of that object. |
duke@435 | 93 | // |
duke@435 | 94 | // complete The iteration is complete. All objects in the range |
duke@435 | 95 | // were processed and the closure is not full; |
duke@435 | 96 | // closure->source() is set one past the end of the range. |
duke@435 | 97 | // |
duke@435 | 98 | // full The closure is full; closure->source() is set to one |
duke@435 | 99 | // past the end of the last object processed. |
duke@435 | 100 | // |
duke@435 | 101 | // would_overflow The next object in the range would overflow the closure; |
duke@435 | 102 | // closure->source() is set to the start of that object. |
duke@435 | 103 | IterationStatus iterate(ParMarkBitMapClosure* live_closure, |
duke@435 | 104 | idx_t range_beg, idx_t range_end) const; |
duke@435 | 105 | inline IterationStatus iterate(ParMarkBitMapClosure* live_closure, |
duke@435 | 106 | HeapWord* range_beg, |
duke@435 | 107 | HeapWord* range_end) const; |
duke@435 | 108 | |
duke@435 | 109 | // Apply live closure as above and additionally apply dead_closure to all dead |
duke@435 | 110 | // space in the range [range_beg, dead_range_end). Note that dead_range_end |
duke@435 | 111 | // must be >= range_end. This is used to iterate over the dense prefix. |
duke@435 | 112 | // |
duke@435 | 113 | // This method assumes that if the first bit in the range (range_beg) is not |
duke@435 | 114 | // marked, then dead space begins at that point and the dead_closure is |
duke@435 | 115 | // applied. Thus callers must ensure that range_beg is not in the middle of a |
duke@435 | 116 | // live object. |
duke@435 | 117 | IterationStatus iterate(ParMarkBitMapClosure* live_closure, |
duke@435 | 118 | ParMarkBitMapClosure* dead_closure, |
duke@435 | 119 | idx_t range_beg, idx_t range_end, |
duke@435 | 120 | idx_t dead_range_end) const; |
duke@435 | 121 | inline IterationStatus iterate(ParMarkBitMapClosure* live_closure, |
duke@435 | 122 | ParMarkBitMapClosure* dead_closure, |
duke@435 | 123 | HeapWord* range_beg, |
duke@435 | 124 | HeapWord* range_end, |
duke@435 | 125 | HeapWord* dead_range_end) const; |
duke@435 | 126 | |
duke@435 | 127 | // Return the number of live words in the range [beg_addr, end_addr) due to |
duke@435 | 128 | // objects that start in the range. If a live object extends onto the range, |
duke@435 | 129 | // the caller must detect and account for any live words due to that object. |
duke@435 | 130 | // If a live object extends beyond the end of the range, only the words within |
duke@435 | 131 | // the range are included in the result. |
duke@435 | 132 | size_t live_words_in_range(HeapWord* beg_addr, HeapWord* end_addr) const; |
duke@435 | 133 | |
duke@435 | 134 | // Same as the above, except the end of the range must be a live object, which |
duke@435 | 135 | // is the case when updating pointers. This allows a branch to be removed |
duke@435 | 136 | // from inside the loop. |
duke@435 | 137 | size_t live_words_in_range(HeapWord* beg_addr, oop end_obj) const; |
duke@435 | 138 | |
duke@435 | 139 | inline HeapWord* region_start() const; |
duke@435 | 140 | inline HeapWord* region_end() const; |
duke@435 | 141 | inline size_t region_size() const; |
duke@435 | 142 | inline size_t size() const; |
duke@435 | 143 | |
duke@435 | 144 | // Convert a heap address to/from a bit index. |
duke@435 | 145 | inline idx_t addr_to_bit(HeapWord* addr) const; |
duke@435 | 146 | inline HeapWord* bit_to_addr(idx_t bit) const; |
duke@435 | 147 | |
duke@435 | 148 | // Return the bit index of the first marked object that begins (or ends, |
duke@435 | 149 | // respectively) in the range [beg, end). If no object is found, return end. |
duke@435 | 150 | inline idx_t find_obj_beg(idx_t beg, idx_t end) const; |
duke@435 | 151 | inline idx_t find_obj_end(idx_t beg, idx_t end) const; |
duke@435 | 152 | |
duke@435 | 153 | inline HeapWord* find_obj_beg(HeapWord* beg, HeapWord* end) const; |
duke@435 | 154 | inline HeapWord* find_obj_end(HeapWord* beg, HeapWord* end) const; |
duke@435 | 155 | |
duke@435 | 156 | // Clear a range of bits or the entire bitmap (both begin and end bits are |
duke@435 | 157 | // cleared). |
duke@435 | 158 | inline void clear_range(idx_t beg, idx_t end); |
duke@435 | 159 | inline void clear() { clear_range(0, size()); } |
duke@435 | 160 | |
duke@435 | 161 | // Return the number of bits required to represent the specified number of |
duke@435 | 162 | // HeapWords, or the specified region. |
duke@435 | 163 | static inline idx_t bits_required(size_t words); |
duke@435 | 164 | static inline idx_t bits_required(MemRegion covered_region); |
duke@435 | 165 | static inline idx_t words_required(MemRegion covered_region); |
duke@435 | 166 | |
duke@435 | 167 | #ifndef PRODUCT |
duke@435 | 168 | // CAS statistics. |
duke@435 | 169 | size_t cas_tries() { return _cas_tries; } |
duke@435 | 170 | size_t cas_retries() { return _cas_retries; } |
duke@435 | 171 | size_t cas_by_another() { return _cas_by_another; } |
duke@435 | 172 | |
duke@435 | 173 | void reset_counters(); |
duke@435 | 174 | #endif // #ifndef PRODUCT |
duke@435 | 175 | |
duke@435 | 176 | #ifdef ASSERT |
duke@435 | 177 | void verify_clear() const; |
duke@435 | 178 | inline void verify_bit(idx_t bit) const; |
duke@435 | 179 | inline void verify_addr(HeapWord* addr) const; |
duke@435 | 180 | #endif // #ifdef ASSERT |
duke@435 | 181 | |
duke@435 | 182 | private: |
duke@435 | 183 | // Each bit in the bitmap represents one unit of 'object granularity.' Objects |
duke@435 | 184 | // are double-word aligned in 32-bit VMs, but not in 64-bit VMs, so the 32-bit |
duke@435 | 185 | // granularity is 2, 64-bit is 1. |
duke@435 | 186 | static inline size_t obj_granularity() { return size_t(MinObjAlignment); } |
jcoomes@1243 | 187 | static inline int obj_granularity_shift() { return LogMinObjAlignment; } |
duke@435 | 188 | |
duke@435 | 189 | HeapWord* _region_start; |
duke@435 | 190 | size_t _region_size; |
duke@435 | 191 | BitMap _beg_bits; |
duke@435 | 192 | BitMap _end_bits; |
duke@435 | 193 | PSVirtualSpace* _virtual_space; |
duke@435 | 194 | |
duke@435 | 195 | #ifndef PRODUCT |
duke@435 | 196 | size_t _cas_tries; |
duke@435 | 197 | size_t _cas_retries; |
duke@435 | 198 | size_t _cas_by_another; |
duke@435 | 199 | #endif // #ifndef PRODUCT |
duke@435 | 200 | }; |
duke@435 | 201 | |
duke@435 | 202 | inline ParMarkBitMap::ParMarkBitMap(): |
ysr@777 | 203 | _beg_bits(), |
ysr@777 | 204 | _end_bits() |
duke@435 | 205 | { |
duke@435 | 206 | _region_start = 0; |
duke@435 | 207 | _virtual_space = 0; |
duke@435 | 208 | } |
duke@435 | 209 | |
duke@435 | 210 | inline ParMarkBitMap::ParMarkBitMap(MemRegion covered_region): |
ysr@777 | 211 | _beg_bits(), |
ysr@777 | 212 | _end_bits() |
duke@435 | 213 | { |
duke@435 | 214 | initialize(covered_region); |
duke@435 | 215 | } |
duke@435 | 216 | |
duke@435 | 217 | inline void ParMarkBitMap::clear_range(idx_t beg, idx_t end) |
duke@435 | 218 | { |
duke@435 | 219 | _beg_bits.clear_range(beg, end); |
duke@435 | 220 | _end_bits.clear_range(beg, end); |
duke@435 | 221 | } |
duke@435 | 222 | |
duke@435 | 223 | inline ParMarkBitMap::idx_t |
duke@435 | 224 | ParMarkBitMap::bits_required(size_t words) |
duke@435 | 225 | { |
duke@435 | 226 | // Need two bits (one begin bit, one end bit) for each unit of 'object |
duke@435 | 227 | // granularity' in the heap. |
duke@435 | 228 | return words_to_bits(words * 2); |
duke@435 | 229 | } |
duke@435 | 230 | |
duke@435 | 231 | inline ParMarkBitMap::idx_t |
duke@435 | 232 | ParMarkBitMap::bits_required(MemRegion covered_region) |
duke@435 | 233 | { |
duke@435 | 234 | return bits_required(covered_region.word_size()); |
duke@435 | 235 | } |
duke@435 | 236 | |
duke@435 | 237 | inline ParMarkBitMap::idx_t |
duke@435 | 238 | ParMarkBitMap::words_required(MemRegion covered_region) |
duke@435 | 239 | { |
duke@435 | 240 | return bits_required(covered_region) / BitsPerWord; |
duke@435 | 241 | } |
duke@435 | 242 | |
duke@435 | 243 | inline HeapWord* |
duke@435 | 244 | ParMarkBitMap::region_start() const |
duke@435 | 245 | { |
duke@435 | 246 | return _region_start; |
duke@435 | 247 | } |
duke@435 | 248 | |
duke@435 | 249 | inline HeapWord* |
duke@435 | 250 | ParMarkBitMap::region_end() const |
duke@435 | 251 | { |
duke@435 | 252 | return region_start() + region_size(); |
duke@435 | 253 | } |
duke@435 | 254 | |
duke@435 | 255 | inline size_t |
duke@435 | 256 | ParMarkBitMap::region_size() const |
duke@435 | 257 | { |
duke@435 | 258 | return _region_size; |
duke@435 | 259 | } |
duke@435 | 260 | |
duke@435 | 261 | inline size_t |
duke@435 | 262 | ParMarkBitMap::size() const |
duke@435 | 263 | { |
duke@435 | 264 | return _beg_bits.size(); |
duke@435 | 265 | } |
duke@435 | 266 | |
duke@435 | 267 | inline bool ParMarkBitMap::is_obj_beg(idx_t bit) const |
duke@435 | 268 | { |
duke@435 | 269 | return _beg_bits.at(bit); |
duke@435 | 270 | } |
duke@435 | 271 | |
duke@435 | 272 | inline bool ParMarkBitMap::is_obj_end(idx_t bit) const |
duke@435 | 273 | { |
duke@435 | 274 | return _end_bits.at(bit); |
duke@435 | 275 | } |
duke@435 | 276 | |
duke@435 | 277 | inline bool ParMarkBitMap::is_marked(idx_t bit) const |
duke@435 | 278 | { |
duke@435 | 279 | return is_obj_beg(bit); |
duke@435 | 280 | } |
duke@435 | 281 | |
duke@435 | 282 | inline bool ParMarkBitMap::is_marked(HeapWord* addr) const |
duke@435 | 283 | { |
duke@435 | 284 | return is_marked(addr_to_bit(addr)); |
duke@435 | 285 | } |
duke@435 | 286 | |
duke@435 | 287 | inline bool ParMarkBitMap::is_marked(oop obj) const |
duke@435 | 288 | { |
duke@435 | 289 | return is_marked((HeapWord*)obj); |
duke@435 | 290 | } |
duke@435 | 291 | |
duke@435 | 292 | inline bool ParMarkBitMap::is_unmarked(idx_t bit) const |
duke@435 | 293 | { |
duke@435 | 294 | return !is_marked(bit); |
duke@435 | 295 | } |
duke@435 | 296 | |
duke@435 | 297 | inline bool ParMarkBitMap::is_unmarked(HeapWord* addr) const |
duke@435 | 298 | { |
duke@435 | 299 | return !is_marked(addr); |
duke@435 | 300 | } |
duke@435 | 301 | |
duke@435 | 302 | inline bool ParMarkBitMap::is_unmarked(oop obj) const |
duke@435 | 303 | { |
duke@435 | 304 | return !is_marked(obj); |
duke@435 | 305 | } |
duke@435 | 306 | |
duke@435 | 307 | inline size_t |
duke@435 | 308 | ParMarkBitMap::bits_to_words(idx_t bits) |
duke@435 | 309 | { |
jcoomes@1243 | 310 | return bits << obj_granularity_shift(); |
duke@435 | 311 | } |
duke@435 | 312 | |
duke@435 | 313 | inline ParMarkBitMap::idx_t |
duke@435 | 314 | ParMarkBitMap::words_to_bits(size_t words) |
duke@435 | 315 | { |
jcoomes@1243 | 316 | return words >> obj_granularity_shift(); |
duke@435 | 317 | } |
duke@435 | 318 | |
duke@435 | 319 | inline size_t ParMarkBitMap::obj_size(idx_t beg_bit, idx_t end_bit) const |
duke@435 | 320 | { |
duke@435 | 321 | DEBUG_ONLY(verify_bit(beg_bit);) |
duke@435 | 322 | DEBUG_ONLY(verify_bit(end_bit);) |
duke@435 | 323 | return bits_to_words(end_bit - beg_bit + 1); |
duke@435 | 324 | } |
duke@435 | 325 | |
duke@435 | 326 | inline size_t |
duke@435 | 327 | ParMarkBitMap::obj_size(HeapWord* beg_addr, HeapWord* end_addr) const |
duke@435 | 328 | { |
duke@435 | 329 | DEBUG_ONLY(verify_addr(beg_addr);) |
duke@435 | 330 | DEBUG_ONLY(verify_addr(end_addr);) |
duke@435 | 331 | return pointer_delta(end_addr, beg_addr) + obj_granularity(); |
duke@435 | 332 | } |
duke@435 | 333 | |
duke@435 | 334 | inline size_t ParMarkBitMap::obj_size(idx_t beg_bit) const |
duke@435 | 335 | { |
ysr@777 | 336 | const idx_t end_bit = _end_bits.get_next_one_offset_inline(beg_bit, size()); |
duke@435 | 337 | assert(is_marked(beg_bit), "obj not marked"); |
duke@435 | 338 | assert(end_bit < size(), "end bit missing"); |
duke@435 | 339 | return obj_size(beg_bit, end_bit); |
duke@435 | 340 | } |
duke@435 | 341 | |
duke@435 | 342 | inline size_t ParMarkBitMap::obj_size(HeapWord* addr) const |
duke@435 | 343 | { |
duke@435 | 344 | return obj_size(addr_to_bit(addr)); |
duke@435 | 345 | } |
duke@435 | 346 | |
duke@435 | 347 | inline size_t ParMarkBitMap::obj_size(oop obj) const |
duke@435 | 348 | { |
duke@435 | 349 | return obj_size((HeapWord*)obj); |
duke@435 | 350 | } |
duke@435 | 351 | |
duke@435 | 352 | inline ParMarkBitMap::IterationStatus |
duke@435 | 353 | ParMarkBitMap::iterate(ParMarkBitMapClosure* live_closure, |
duke@435 | 354 | HeapWord* range_beg, |
duke@435 | 355 | HeapWord* range_end) const |
duke@435 | 356 | { |
duke@435 | 357 | return iterate(live_closure, addr_to_bit(range_beg), addr_to_bit(range_end)); |
duke@435 | 358 | } |
duke@435 | 359 | |
duke@435 | 360 | inline ParMarkBitMap::IterationStatus |
duke@435 | 361 | ParMarkBitMap::iterate(ParMarkBitMapClosure* live_closure, |
duke@435 | 362 | ParMarkBitMapClosure* dead_closure, |
duke@435 | 363 | HeapWord* range_beg, |
duke@435 | 364 | HeapWord* range_end, |
duke@435 | 365 | HeapWord* dead_range_end) const |
duke@435 | 366 | { |
duke@435 | 367 | return iterate(live_closure, dead_closure, |
duke@435 | 368 | addr_to_bit(range_beg), addr_to_bit(range_end), |
duke@435 | 369 | addr_to_bit(dead_range_end)); |
duke@435 | 370 | } |
duke@435 | 371 | |
duke@435 | 372 | inline bool |
duke@435 | 373 | ParMarkBitMap::mark_obj(oop obj, int size) |
duke@435 | 374 | { |
duke@435 | 375 | return mark_obj((HeapWord*)obj, (size_t)size); |
duke@435 | 376 | } |
duke@435 | 377 | |
duke@435 | 378 | inline BitMap::idx_t |
duke@435 | 379 | ParMarkBitMap::addr_to_bit(HeapWord* addr) const |
duke@435 | 380 | { |
duke@435 | 381 | DEBUG_ONLY(verify_addr(addr);) |
duke@435 | 382 | return words_to_bits(pointer_delta(addr, region_start())); |
duke@435 | 383 | } |
duke@435 | 384 | |
duke@435 | 385 | inline HeapWord* |
duke@435 | 386 | ParMarkBitMap::bit_to_addr(idx_t bit) const |
duke@435 | 387 | { |
duke@435 | 388 | DEBUG_ONLY(verify_bit(bit);) |
duke@435 | 389 | return region_start() + bits_to_words(bit); |
duke@435 | 390 | } |
duke@435 | 391 | |
duke@435 | 392 | inline ParMarkBitMap::idx_t |
duke@435 | 393 | ParMarkBitMap::find_obj_beg(idx_t beg, idx_t end) const |
duke@435 | 394 | { |
ysr@777 | 395 | return _beg_bits.get_next_one_offset_inline_aligned_right(beg, end); |
duke@435 | 396 | } |
duke@435 | 397 | |
duke@435 | 398 | inline ParMarkBitMap::idx_t |
duke@435 | 399 | ParMarkBitMap::find_obj_end(idx_t beg, idx_t end) const |
duke@435 | 400 | { |
ysr@777 | 401 | return _end_bits.get_next_one_offset_inline_aligned_right(beg, end); |
duke@435 | 402 | } |
duke@435 | 403 | |
duke@435 | 404 | inline HeapWord* |
duke@435 | 405 | ParMarkBitMap::find_obj_beg(HeapWord* beg, HeapWord* end) const |
duke@435 | 406 | { |
duke@435 | 407 | const idx_t beg_bit = addr_to_bit(beg); |
duke@435 | 408 | const idx_t end_bit = addr_to_bit(end); |
duke@435 | 409 | const idx_t search_end = BitMap::word_align_up(end_bit); |
duke@435 | 410 | const idx_t res_bit = MIN2(find_obj_beg(beg_bit, search_end), end_bit); |
duke@435 | 411 | return bit_to_addr(res_bit); |
duke@435 | 412 | } |
duke@435 | 413 | |
duke@435 | 414 | inline HeapWord* |
duke@435 | 415 | ParMarkBitMap::find_obj_end(HeapWord* beg, HeapWord* end) const |
duke@435 | 416 | { |
duke@435 | 417 | const idx_t beg_bit = addr_to_bit(beg); |
duke@435 | 418 | const idx_t end_bit = addr_to_bit(end); |
duke@435 | 419 | const idx_t search_end = BitMap::word_align_up(end_bit); |
duke@435 | 420 | const idx_t res_bit = MIN2(find_obj_end(beg_bit, search_end), end_bit); |
duke@435 | 421 | return bit_to_addr(res_bit); |
duke@435 | 422 | } |
duke@435 | 423 | |
duke@435 | 424 | #ifdef ASSERT |
duke@435 | 425 | inline void ParMarkBitMap::verify_bit(idx_t bit) const { |
duke@435 | 426 | // Allow one past the last valid bit; useful for loop bounds. |
duke@435 | 427 | assert(bit <= _beg_bits.size(), "bit out of range"); |
duke@435 | 428 | } |
duke@435 | 429 | |
duke@435 | 430 | inline void ParMarkBitMap::verify_addr(HeapWord* addr) const { |
duke@435 | 431 | // Allow one past the last valid address; useful for loop bounds. |
duke@435 | 432 | assert(addr >= region_start(), "addr too small"); |
duke@435 | 433 | assert(addr <= region_start() + region_size(), "addr too big"); |
duke@435 | 434 | } |
duke@435 | 435 | #endif // #ifdef ASSERT |
stefank@2314 | 436 | |
stefank@2314 | 437 | #endif // SHARE_VM_GC_IMPLEMENTATION_PARALLELSCAVENGE_PARMARKBITMAP_HPP |