Mercurial > hg > truffle
annotate src/share/vm/gc_implementation/g1/heapRegion.cpp @ 3978:f0ecbe78fc7b
7092238: G1: Uninitialized field gc_efficiency in G1PrintRegionLivenessInfo output
Reviewed-by: jcoomes, johnc
| author | tonyp |
|---|---|
| date | Thu, 22 Sep 2011 07:18:51 -0400 |
| parents | f44782f04dd4 |
| children | 4dfb2df418f2 |
| rev | line source |
|---|---|
| 342 | 1 /* |
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2 * Copyright (c) 2001, 2011, Oracle and/or its affiliates. All rights reserved. |
| 342 | 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. |
| 342 | 22 * |
| 23 */ | |
| 24 | |
| 1972 | 25 #include "precompiled.hpp" |
| 26 #include "gc_implementation/g1/g1BlockOffsetTable.inline.hpp" | |
| 27 #include "gc_implementation/g1/g1CollectedHeap.inline.hpp" | |
| 28 #include "gc_implementation/g1/g1OopClosures.inline.hpp" | |
| 29 #include "gc_implementation/g1/heapRegion.inline.hpp" | |
| 30 #include "gc_implementation/g1/heapRegionRemSet.hpp" | |
| 31 #include "gc_implementation/g1/heapRegionSeq.inline.hpp" | |
| 32 #include "memory/genOopClosures.inline.hpp" | |
| 33 #include "memory/iterator.hpp" | |
| 34 #include "oops/oop.inline.hpp" | |
| 342 | 35 |
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36 int HeapRegion::LogOfHRGrainBytes = 0; |
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37 int HeapRegion::LogOfHRGrainWords = 0; |
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38 int HeapRegion::GrainBytes = 0; |
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39 int HeapRegion::GrainWords = 0; |
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40 int HeapRegion::CardsPerRegion = 0; |
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41 |
| 342 | 42 HeapRegionDCTOC::HeapRegionDCTOC(G1CollectedHeap* g1, |
| 43 HeapRegion* hr, OopClosure* cl, | |
| 44 CardTableModRefBS::PrecisionStyle precision, | |
| 45 FilterKind fk) : | |
| 46 ContiguousSpaceDCTOC(hr, cl, precision, NULL), | |
| 47 _hr(hr), _fk(fk), _g1(g1) | |
| 48 {} | |
| 49 | |
| 50 FilterOutOfRegionClosure::FilterOutOfRegionClosure(HeapRegion* r, | |
| 51 OopClosure* oc) : | |
| 52 _r_bottom(r->bottom()), _r_end(r->end()), | |
| 53 _oc(oc), _out_of_region(0) | |
| 54 {} | |
| 55 | |
| 56 class VerifyLiveClosure: public OopClosure { | |
| 811 | 57 private: |
| 342 | 58 G1CollectedHeap* _g1h; |
| 59 CardTableModRefBS* _bs; | |
| 60 oop _containing_obj; | |
| 61 bool _failures; | |
| 62 int _n_failures; | |
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63 VerifyOption _vo; |
| 342 | 64 public: |
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65 // _vo == UsePrevMarking -> use "prev" marking information, |
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66 // _vo == UseNextMarking -> use "next" marking information, |
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67 // _vo == UseMarkWord -> use mark word from object header. |
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68 VerifyLiveClosure(G1CollectedHeap* g1h, VerifyOption vo) : |
| 342 | 69 _g1h(g1h), _bs(NULL), _containing_obj(NULL), |
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70 _failures(false), _n_failures(0), _vo(vo) |
| 342 | 71 { |
| 72 BarrierSet* bs = _g1h->barrier_set(); | |
| 73 if (bs->is_a(BarrierSet::CardTableModRef)) | |
| 74 _bs = (CardTableModRefBS*)bs; | |
| 75 } | |
| 76 | |
| 77 void set_containing_obj(oop obj) { | |
| 78 _containing_obj = obj; | |
| 79 } | |
| 80 | |
| 81 bool failures() { return _failures; } | |
| 82 int n_failures() { return _n_failures; } | |
| 83 | |
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84 virtual void do_oop(narrowOop* p) { do_oop_work(p); } |
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85 virtual void do_oop( oop* p) { do_oop_work(p); } |
| 342 | 86 |
| 1388 | 87 void print_object(outputStream* out, oop obj) { |
| 88 #ifdef PRODUCT | |
| 89 klassOop k = obj->klass(); | |
| 90 const char* class_name = instanceKlass::cast(k)->external_name(); | |
| 91 out->print_cr("class name %s", class_name); | |
| 92 #else // PRODUCT | |
| 93 obj->print_on(out); | |
| 94 #endif // PRODUCT | |
| 95 } | |
| 96 | |
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97 template <class T> void do_oop_work(T* p) { |
| 342 | 98 assert(_containing_obj != NULL, "Precondition"); |
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99 assert(!_g1h->is_obj_dead_cond(_containing_obj, _vo), |
| 811 | 100 "Precondition"); |
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101 T heap_oop = oopDesc::load_heap_oop(p); |
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102 if (!oopDesc::is_null(heap_oop)) { |
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103 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); |
| 342 | 104 bool failed = false; |
| 811 | 105 if (!_g1h->is_in_closed_subset(obj) || |
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106 _g1h->is_obj_dead_cond(obj, _vo)) { |
| 342 | 107 if (!_failures) { |
| 108 gclog_or_tty->print_cr(""); | |
| 109 gclog_or_tty->print_cr("----------"); | |
| 110 } | |
| 111 if (!_g1h->is_in_closed_subset(obj)) { | |
| 1388 | 112 HeapRegion* from = _g1h->heap_region_containing((HeapWord*)p); |
| 342 | 113 gclog_or_tty->print_cr("Field "PTR_FORMAT |
| 1388 | 114 " of live obj "PTR_FORMAT" in region " |
| 115 "["PTR_FORMAT", "PTR_FORMAT")", | |
| 116 p, (void*) _containing_obj, | |
| 117 from->bottom(), from->end()); | |
| 118 print_object(gclog_or_tty, _containing_obj); | |
| 119 gclog_or_tty->print_cr("points to obj "PTR_FORMAT" not in the heap", | |
| 120 (void*) obj); | |
| 121 } else { | |
| 122 HeapRegion* from = _g1h->heap_region_containing((HeapWord*)p); | |
| 123 HeapRegion* to = _g1h->heap_region_containing((HeapWord*)obj); | |
| 124 gclog_or_tty->print_cr("Field "PTR_FORMAT | |
| 125 " of live obj "PTR_FORMAT" in region " | |
| 126 "["PTR_FORMAT", "PTR_FORMAT")", | |
| 127 p, (void*) _containing_obj, | |
| 128 from->bottom(), from->end()); | |
| 129 print_object(gclog_or_tty, _containing_obj); | |
| 130 gclog_or_tty->print_cr("points to dead obj "PTR_FORMAT" in region " | |
| 131 "["PTR_FORMAT", "PTR_FORMAT")", | |
| 132 (void*) obj, to->bottom(), to->end()); | |
| 133 print_object(gclog_or_tty, obj); | |
| 342 | 134 } |
| 135 gclog_or_tty->print_cr("----------"); | |
| 136 _failures = true; | |
| 137 failed = true; | |
| 138 _n_failures++; | |
| 139 } | |
| 140 | |
| 141 if (!_g1h->full_collection()) { | |
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142 HeapRegion* from = _g1h->heap_region_containing((HeapWord*)p); |
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143 HeapRegion* to = _g1h->heap_region_containing(obj); |
| 342 | 144 if (from != NULL && to != NULL && |
| 145 from != to && | |
| 146 !to->isHumongous()) { | |
| 147 jbyte cv_obj = *_bs->byte_for_const(_containing_obj); | |
| 148 jbyte cv_field = *_bs->byte_for_const(p); | |
| 149 const jbyte dirty = CardTableModRefBS::dirty_card_val(); | |
| 150 | |
| 151 bool is_bad = !(from->is_young() | |
| 152 || to->rem_set()->contains_reference(p) | |
| 153 || !G1HRRSFlushLogBuffersOnVerify && // buffers were not flushed | |
| 154 (_containing_obj->is_objArray() ? | |
| 155 cv_field == dirty | |
| 156 : cv_obj == dirty || cv_field == dirty)); | |
| 157 if (is_bad) { | |
| 158 if (!_failures) { | |
| 159 gclog_or_tty->print_cr(""); | |
| 160 gclog_or_tty->print_cr("----------"); | |
| 161 } | |
| 162 gclog_or_tty->print_cr("Missing rem set entry:"); | |
| 3766 | 163 gclog_or_tty->print_cr("Field "PTR_FORMAT" " |
| 164 "of obj "PTR_FORMAT", " | |
| 165 "in region "HR_FORMAT, | |
| 166 p, (void*) _containing_obj, | |
| 167 HR_FORMAT_PARAMS(from)); | |
| 342 | 168 _containing_obj->print_on(gclog_or_tty); |
| 3766 | 169 gclog_or_tty->print_cr("points to obj "PTR_FORMAT" " |
| 170 "in region "HR_FORMAT, | |
| 171 (void*) obj, | |
| 172 HR_FORMAT_PARAMS(to)); | |
| 342 | 173 obj->print_on(gclog_or_tty); |
| 174 gclog_or_tty->print_cr("Obj head CTE = %d, field CTE = %d.", | |
| 175 cv_obj, cv_field); | |
| 176 gclog_or_tty->print_cr("----------"); | |
| 177 _failures = true; | |
| 178 if (!failed) _n_failures++; | |
| 179 } | |
| 180 } | |
| 181 } | |
| 182 } | |
| 183 } | |
| 184 }; | |
| 185 | |
| 186 template<class ClosureType> | |
| 187 HeapWord* walk_mem_region_loop(ClosureType* cl, G1CollectedHeap* g1h, | |
| 188 HeapRegion* hr, | |
| 189 HeapWord* cur, HeapWord* top) { | |
| 190 oop cur_oop = oop(cur); | |
| 191 int oop_size = cur_oop->size(); | |
| 192 HeapWord* next_obj = cur + oop_size; | |
| 193 while (next_obj < top) { | |
| 194 // Keep filtering the remembered set. | |
| 195 if (!g1h->is_obj_dead(cur_oop, hr)) { | |
| 196 // Bottom lies entirely below top, so we can call the | |
| 197 // non-memRegion version of oop_iterate below. | |
| 198 cur_oop->oop_iterate(cl); | |
| 199 } | |
| 200 cur = next_obj; | |
| 201 cur_oop = oop(cur); | |
| 202 oop_size = cur_oop->size(); | |
| 203 next_obj = cur + oop_size; | |
| 204 } | |
| 205 return cur; | |
| 206 } | |
| 207 | |
| 208 void HeapRegionDCTOC::walk_mem_region_with_cl(MemRegion mr, | |
| 209 HeapWord* bottom, | |
| 210 HeapWord* top, | |
| 211 OopClosure* cl) { | |
| 212 G1CollectedHeap* g1h = _g1; | |
| 213 | |
| 214 int oop_size; | |
| 215 | |
| 216 OopClosure* cl2 = cl; | |
| 217 FilterIntoCSClosure intoCSFilt(this, g1h, cl); | |
| 218 FilterOutOfRegionClosure outOfRegionFilt(_hr, cl); | |
| 219 switch (_fk) { | |
| 220 case IntoCSFilterKind: cl2 = &intoCSFilt; break; | |
| 221 case OutOfRegionFilterKind: cl2 = &outOfRegionFilt; break; | |
| 222 } | |
| 223 | |
| 224 // Start filtering what we add to the remembered set. If the object is | |
| 225 // not considered dead, either because it is marked (in the mark bitmap) | |
| 226 // or it was allocated after marking finished, then we add it. Otherwise | |
| 227 // we can safely ignore the object. | |
| 228 if (!g1h->is_obj_dead(oop(bottom), _hr)) { | |
| 229 oop_size = oop(bottom)->oop_iterate(cl2, mr); | |
| 230 } else { | |
| 231 oop_size = oop(bottom)->size(); | |
| 232 } | |
| 233 | |
| 234 bottom += oop_size; | |
| 235 | |
| 236 if (bottom < top) { | |
| 237 // We replicate the loop below for several kinds of possible filters. | |
| 238 switch (_fk) { | |
| 239 case NoFilterKind: | |
| 240 bottom = walk_mem_region_loop(cl, g1h, _hr, bottom, top); | |
| 241 break; | |
| 242 case IntoCSFilterKind: { | |
| 243 FilterIntoCSClosure filt(this, g1h, cl); | |
| 244 bottom = walk_mem_region_loop(&filt, g1h, _hr, bottom, top); | |
| 245 break; | |
| 246 } | |
| 247 case OutOfRegionFilterKind: { | |
| 248 FilterOutOfRegionClosure filt(_hr, cl); | |
| 249 bottom = walk_mem_region_loop(&filt, g1h, _hr, bottom, top); | |
| 250 break; | |
| 251 } | |
| 252 default: | |
| 253 ShouldNotReachHere(); | |
| 254 } | |
| 255 | |
| 256 // Last object. Need to do dead-obj filtering here too. | |
| 257 if (!g1h->is_obj_dead(oop(bottom), _hr)) { | |
| 258 oop(bottom)->oop_iterate(cl2, mr); | |
| 259 } | |
| 260 } | |
| 261 } | |
| 262 | |
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263 // Minimum region size; we won't go lower than that. |
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264 // We might want to decrease this in the future, to deal with small |
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265 // heaps a bit more efficiently. |
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266 #define MIN_REGION_SIZE ( 1024 * 1024 ) |
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267 |
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268 // Maximum region size; we don't go higher than that. There's a good |
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269 // reason for having an upper bound. We don't want regions to get too |
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270 // large, otherwise cleanup's effectiveness would decrease as there |
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271 // will be fewer opportunities to find totally empty regions after |
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272 // marking. |
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273 #define MAX_REGION_SIZE ( 32 * 1024 * 1024 ) |
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274 |
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275 // The automatic region size calculation will try to have around this |
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276 // many regions in the heap (based on the min heap size). |
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277 #define TARGET_REGION_NUMBER 2048 |
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278 |
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279 void HeapRegion::setup_heap_region_size(uintx min_heap_size) { |
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280 // region_size in bytes |
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281 uintx region_size = G1HeapRegionSize; |
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282 if (FLAG_IS_DEFAULT(G1HeapRegionSize)) { |
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283 // We base the automatic calculation on the min heap size. This |
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284 // can be problematic if the spread between min and max is quite |
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285 // wide, imagine -Xms128m -Xmx32g. But, if we decided it based on |
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286 // the max size, the region size might be way too large for the |
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287 // min size. Either way, some users might have to set the region |
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288 // size manually for some -Xms / -Xmx combos. |
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289 |
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290 region_size = MAX2(min_heap_size / TARGET_REGION_NUMBER, |
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291 (uintx) MIN_REGION_SIZE); |
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292 } |
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293 |
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294 int region_size_log = log2_long((jlong) region_size); |
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295 // Recalculate the region size to make sure it's a power of |
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296 // 2. This means that region_size is the largest power of 2 that's |
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297 // <= what we've calculated so far. |
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298 region_size = ((uintx)1 << region_size_log); |
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299 |
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300 // Now make sure that we don't go over or under our limits. |
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301 if (region_size < MIN_REGION_SIZE) { |
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302 region_size = MIN_REGION_SIZE; |
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303 } else if (region_size > MAX_REGION_SIZE) { |
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304 region_size = MAX_REGION_SIZE; |
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305 } |
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306 |
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307 // And recalculate the log. |
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308 region_size_log = log2_long((jlong) region_size); |
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309 |
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310 // Now, set up the globals. |
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311 guarantee(LogOfHRGrainBytes == 0, "we should only set it once"); |
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312 LogOfHRGrainBytes = region_size_log; |
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313 |
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314 guarantee(LogOfHRGrainWords == 0, "we should only set it once"); |
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315 LogOfHRGrainWords = LogOfHRGrainBytes - LogHeapWordSize; |
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316 |
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317 guarantee(GrainBytes == 0, "we should only set it once"); |
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318 // The cast to int is safe, given that we've bounded region_size by |
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319 // MIN_REGION_SIZE and MAX_REGION_SIZE. |
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320 GrainBytes = (int) region_size; |
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321 |
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322 guarantee(GrainWords == 0, "we should only set it once"); |
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323 GrainWords = GrainBytes >> LogHeapWordSize; |
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324 guarantee(1 << LogOfHRGrainWords == GrainWords, "sanity"); |
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325 |
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326 guarantee(CardsPerRegion == 0, "we should only set it once"); |
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327 CardsPerRegion = GrainBytes >> CardTableModRefBS::card_shift; |
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328 } |
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329 |
| 342 | 330 void HeapRegion::reset_after_compaction() { |
| 331 G1OffsetTableContigSpace::reset_after_compaction(); | |
| 332 // After a compaction the mark bitmap is invalid, so we must | |
| 333 // treat all objects as being inside the unmarked area. | |
| 334 zero_marked_bytes(); | |
| 335 init_top_at_mark_start(); | |
| 336 } | |
| 337 | |
| 338 DirtyCardToOopClosure* | |
| 339 HeapRegion::new_dcto_closure(OopClosure* cl, | |
| 340 CardTableModRefBS::PrecisionStyle precision, | |
| 341 HeapRegionDCTOC::FilterKind fk) { | |
| 342 return new HeapRegionDCTOC(G1CollectedHeap::heap(), | |
| 343 this, cl, precision, fk); | |
| 344 } | |
| 345 | |
| 346 void HeapRegion::hr_clear(bool par, bool clear_space) { | |
| 2152 | 347 assert(_humongous_type == NotHumongous, |
| 348 "we should have already filtered out humongous regions"); | |
| 349 assert(_humongous_start_region == NULL, | |
| 350 "we should have already filtered out humongous regions"); | |
| 351 assert(_end == _orig_end, | |
| 352 "we should have already filtered out humongous regions"); | |
| 353 | |
| 342 | 354 _in_collection_set = false; |
| 355 | |
| 356 set_young_index_in_cset(-1); | |
| 357 uninstall_surv_rate_group(); | |
| 358 set_young_type(NotYoung); | |
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359 reset_pre_dummy_top(); |
| 342 | 360 |
| 361 if (!par) { | |
| 362 // If this is parallel, this will be done later. | |
| 363 HeapRegionRemSet* hrrs = rem_set(); | |
| 364 if (hrrs != NULL) hrrs->clear(); | |
| 355 | 365 _claimed = InitialClaimValue; |
| 342 | 366 } |
| 367 zero_marked_bytes(); | |
| 368 set_sort_index(-1); | |
| 369 | |
| 370 _offsets.resize(HeapRegion::GrainWords); | |
| 371 init_top_at_mark_start(); | |
| 356 | 372 if (clear_space) clear(SpaceDecorator::Mangle); |
| 342 | 373 } |
| 374 | |
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375 void HeapRegion::par_clear() { |
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376 assert(used() == 0, "the region should have been already cleared"); |
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377 assert(capacity() == (size_t) HeapRegion::GrainBytes, |
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378 "should be back to normal"); |
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379 HeapRegionRemSet* hrrs = rem_set(); |
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380 hrrs->clear(); |
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381 CardTableModRefBS* ct_bs = |
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382 (CardTableModRefBS*)G1CollectedHeap::heap()->barrier_set(); |
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383 ct_bs->clear(MemRegion(bottom(), end())); |
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384 } |
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385 |
| 342 | 386 // <PREDICTION> |
| 387 void HeapRegion::calc_gc_efficiency() { | |
| 388 G1CollectedHeap* g1h = G1CollectedHeap::heap(); | |
| 389 _gc_efficiency = (double) garbage_bytes() / | |
| 390 g1h->predict_region_elapsed_time_ms(this, false); | |
| 391 } | |
| 392 // </PREDICTION> | |
| 393 | |
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394 void HeapRegion::set_startsHumongous(HeapWord* new_top, HeapWord* new_end) { |
| 2152 | 395 assert(!isHumongous(), "sanity / pre-condition"); |
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396 assert(end() == _orig_end, |
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397 "Should be normal before the humongous object allocation"); |
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398 assert(top() == bottom(), "should be empty"); |
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399 assert(bottom() <= new_top && new_top <= new_end, "pre-condition"); |
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400 |
| 355 | 401 _humongous_type = StartsHumongous; |
| 342 | 402 _humongous_start_region = this; |
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403 |
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404 set_end(new_end); |
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405 _offsets.set_for_starts_humongous(new_top); |
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406 } |
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407 |
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408 void HeapRegion::set_continuesHumongous(HeapRegion* first_hr) { |
| 2152 | 409 assert(!isHumongous(), "sanity / pre-condition"); |
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410 assert(end() == _orig_end, |
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411 "Should be normal before the humongous object allocation"); |
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412 assert(top() == bottom(), "should be empty"); |
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413 assert(first_hr->startsHumongous(), "pre-condition"); |
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414 |
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415 _humongous_type = ContinuesHumongous; |
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416 _humongous_start_region = first_hr; |
| 342 | 417 } |
| 418 | |
| 2152 | 419 void HeapRegion::set_notHumongous() { |
| 420 assert(isHumongous(), "pre-condition"); | |
| 421 | |
| 422 if (startsHumongous()) { | |
| 423 assert(top() <= end(), "pre-condition"); | |
| 424 set_end(_orig_end); | |
| 425 if (top() > end()) { | |
| 426 // at least one "continues humongous" region after it | |
| 427 set_top(end()); | |
| 428 } | |
| 429 } else { | |
| 430 // continues humongous | |
| 431 assert(end() == _orig_end, "sanity"); | |
| 432 } | |
| 433 | |
| 434 assert(capacity() == (size_t) HeapRegion::GrainBytes, "pre-condition"); | |
| 435 _humongous_type = NotHumongous; | |
| 436 _humongous_start_region = NULL; | |
| 437 } | |
| 438 | |
| 342 | 439 bool HeapRegion::claimHeapRegion(jint claimValue) { |
| 440 jint current = _claimed; | |
| 441 if (current != claimValue) { | |
| 442 jint res = Atomic::cmpxchg(claimValue, &_claimed, current); | |
| 443 if (res == current) { | |
| 444 return true; | |
| 445 } | |
| 446 } | |
| 447 return false; | |
| 448 } | |
| 449 | |
| 450 HeapWord* HeapRegion::next_block_start_careful(HeapWord* addr) { | |
| 451 HeapWord* low = addr; | |
| 452 HeapWord* high = end(); | |
| 453 while (low < high) { | |
| 454 size_t diff = pointer_delta(high, low); | |
| 455 // Must add one below to bias toward the high amount. Otherwise, if | |
| 456 // "high" were at the desired value, and "low" were one less, we | |
| 457 // would not converge on "high". This is not symmetric, because | |
| 458 // we set "high" to a block start, which might be the right one, | |
| 459 // which we don't do for "low". | |
| 460 HeapWord* middle = low + (diff+1)/2; | |
| 461 if (middle == high) return high; | |
| 462 HeapWord* mid_bs = block_start_careful(middle); | |
| 463 if (mid_bs < addr) { | |
| 464 low = middle; | |
| 465 } else { | |
| 466 high = mid_bs; | |
| 467 } | |
| 468 } | |
| 469 assert(low == high && low >= addr, "Didn't work."); | |
| 470 return low; | |
| 471 } | |
| 472 | |
| 356 | 473 void HeapRegion::initialize(MemRegion mr, bool clear_space, bool mangle_space) { |
| 474 G1OffsetTableContigSpace::initialize(mr, false, mangle_space); | |
| 342 | 475 hr_clear(false/*par*/, clear_space); |
| 476 } | |
| 477 #ifdef _MSC_VER // the use of 'this' below gets a warning, make it go away | |
| 478 #pragma warning( disable:4355 ) // 'this' : used in base member initializer list | |
| 479 #endif // _MSC_VER | |
| 480 | |
| 481 | |
| 482 HeapRegion:: | |
| 3766 | 483 HeapRegion(size_t hrs_index, G1BlockOffsetSharedArray* sharedOffsetArray, |
| 484 MemRegion mr, bool is_zeroed) | |
| 342 | 485 : G1OffsetTableContigSpace(sharedOffsetArray, mr, is_zeroed), |
| 3766 | 486 _next_fk(HeapRegionDCTOC::NoFilterKind), _hrs_index(hrs_index), |
| 355 | 487 _humongous_type(NotHumongous), _humongous_start_region(NULL), |
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488 _in_collection_set(false), |
| 342 | 489 _next_in_special_set(NULL), _orig_end(NULL), |
| 355 | 490 _claimed(InitialClaimValue), _evacuation_failed(false), |
| 342 | 491 _prev_marked_bytes(0), _next_marked_bytes(0), _sort_index(-1), |
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492 _gc_efficiency(0.0), |
| 342 | 493 _young_type(NotYoung), _next_young_region(NULL), |
| 2152 | 494 _next_dirty_cards_region(NULL), _next(NULL), _pending_removal(false), |
| 495 #ifdef ASSERT | |
| 496 _containing_set(NULL), | |
| 497 #endif // ASSERT | |
| 498 _young_index_in_cset(-1), _surv_rate_group(NULL), _age_index(-1), | |
| 499 _rem_set(NULL), _recorded_rs_length(0), _predicted_elapsed_time_ms(0), | |
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500 _predicted_bytes_to_copy(0) |
| 342 | 501 { |
| 502 _orig_end = mr.end(); | |
| 503 // Note that initialize() will set the start of the unmarked area of the | |
| 504 // region. | |
| 356 | 505 this->initialize(mr, !is_zeroed, SpaceDecorator::Mangle); |
| 506 set_top(bottom()); | |
| 507 set_saved_mark(); | |
| 342 | 508 |
| 509 _rem_set = new HeapRegionRemSet(sharedOffsetArray, this); | |
| 510 | |
| 511 assert(HeapRegionRemSet::num_par_rem_sets() > 0, "Invariant."); | |
| 512 // In case the region is allocated during a pause, note the top. | |
| 513 // We haven't done any counting on a brand new region. | |
| 514 _top_at_conc_mark_count = bottom(); | |
| 515 } | |
| 516 | |
| 517 class NextCompactionHeapRegionClosure: public HeapRegionClosure { | |
| 518 const HeapRegion* _target; | |
| 519 bool _target_seen; | |
| 520 HeapRegion* _last; | |
| 521 CompactibleSpace* _res; | |
| 522 public: | |
| 523 NextCompactionHeapRegionClosure(const HeapRegion* target) : | |
| 524 _target(target), _target_seen(false), _res(NULL) {} | |
| 525 bool doHeapRegion(HeapRegion* cur) { | |
| 526 if (_target_seen) { | |
| 527 if (!cur->isHumongous()) { | |
| 528 _res = cur; | |
| 529 return true; | |
| 530 } | |
| 531 } else if (cur == _target) { | |
| 532 _target_seen = true; | |
| 533 } | |
| 534 return false; | |
| 535 } | |
| 536 CompactibleSpace* result() { return _res; } | |
| 537 }; | |
| 538 | |
| 539 CompactibleSpace* HeapRegion::next_compaction_space() const { | |
| 540 G1CollectedHeap* g1h = G1CollectedHeap::heap(); | |
| 541 // cast away const-ness | |
| 542 HeapRegion* r = (HeapRegion*) this; | |
| 543 NextCompactionHeapRegionClosure blk(r); | |
| 544 g1h->heap_region_iterate_from(r, &blk); | |
| 545 return blk.result(); | |
| 546 } | |
| 547 | |
| 548 void HeapRegion::save_marks() { | |
| 549 set_saved_mark(); | |
| 550 } | |
| 551 | |
| 552 void HeapRegion::oops_in_mr_iterate(MemRegion mr, OopClosure* cl) { | |
| 553 HeapWord* p = mr.start(); | |
| 554 HeapWord* e = mr.end(); | |
| 555 oop obj; | |
| 556 while (p < e) { | |
| 557 obj = oop(p); | |
| 558 p += obj->oop_iterate(cl); | |
| 559 } | |
| 560 assert(p == e, "bad memregion: doesn't end on obj boundary"); | |
| 561 } | |
| 562 | |
| 563 #define HeapRegion_OOP_SINCE_SAVE_MARKS_DEFN(OopClosureType, nv_suffix) \ | |
| 564 void HeapRegion::oop_since_save_marks_iterate##nv_suffix(OopClosureType* cl) { \ | |
| 565 ContiguousSpace::oop_since_save_marks_iterate##nv_suffix(cl); \ | |
| 566 } | |
| 567 SPECIALIZED_SINCE_SAVE_MARKS_CLOSURES(HeapRegion_OOP_SINCE_SAVE_MARKS_DEFN) | |
| 568 | |
| 569 | |
| 570 void HeapRegion::oop_before_save_marks_iterate(OopClosure* cl) { | |
| 571 oops_in_mr_iterate(MemRegion(bottom(), saved_mark_word()), cl); | |
| 572 } | |
| 573 | |
| 574 HeapWord* | |
| 575 HeapRegion::object_iterate_mem_careful(MemRegion mr, | |
| 576 ObjectClosure* cl) { | |
| 577 G1CollectedHeap* g1h = G1CollectedHeap::heap(); | |
| 578 // We used to use "block_start_careful" here. But we're actually happy | |
| 579 // to update the BOT while we do this... | |
| 580 HeapWord* cur = block_start(mr.start()); | |
| 581 mr = mr.intersection(used_region()); | |
| 582 if (mr.is_empty()) return NULL; | |
| 583 // Otherwise, find the obj that extends onto mr.start(). | |
| 584 | |
| 585 assert(cur <= mr.start() | |
|
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|
586 && (oop(cur)->klass_or_null() == NULL || |
| 342 | 587 cur + oop(cur)->size() > mr.start()), |
| 588 "postcondition of block_start"); | |
| 589 oop obj; | |
| 590 while (cur < mr.end()) { | |
| 591 obj = oop(cur); | |
|
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592 if (obj->klass_or_null() == NULL) { |
| 342 | 593 // Ran into an unparseable point. |
| 594 return cur; | |
| 595 } else if (!g1h->is_obj_dead(obj)) { | |
| 596 cl->do_object(obj); | |
| 597 } | |
| 598 if (cl->abort()) return cur; | |
| 599 // The check above must occur before the operation below, since an | |
| 600 // abort might invalidate the "size" operation. | |
| 601 cur += obj->size(); | |
| 602 } | |
| 603 return NULL; | |
| 604 } | |
| 605 | |
| 606 HeapWord* | |
| 607 HeapRegion:: | |
| 608 oops_on_card_seq_iterate_careful(MemRegion mr, | |
|
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609 FilterOutOfRegionClosure* cl, |
|
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610 bool filter_young, |
|
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611 jbyte* card_ptr) { |
|
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612 // Currently, we should only have to clean the card if filter_young |
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613 // is true and vice versa. |
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614 if (filter_young) { |
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615 assert(card_ptr != NULL, "pre-condition"); |
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616 } else { |
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617 assert(card_ptr == NULL, "pre-condition"); |
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618 } |
| 342 | 619 G1CollectedHeap* g1h = G1CollectedHeap::heap(); |
| 620 | |
| 621 // If we're within a stop-world GC, then we might look at a card in a | |
| 622 // GC alloc region that extends onto a GC LAB, which may not be | |
| 623 // parseable. Stop such at the "saved_mark" of the region. | |
| 624 if (G1CollectedHeap::heap()->is_gc_active()) { | |
| 625 mr = mr.intersection(used_region_at_save_marks()); | |
| 626 } else { | |
| 627 mr = mr.intersection(used_region()); | |
| 628 } | |
| 629 if (mr.is_empty()) return NULL; | |
| 630 // Otherwise, find the obj that extends onto mr.start(). | |
| 631 | |
|
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632 // The intersection of the incoming mr (for the card) and the |
|
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633 // allocated part of the region is non-empty. This implies that |
|
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634 // we have actually allocated into this region. The code in |
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635 // G1CollectedHeap.cpp that allocates a new region sets the |
|
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636 // is_young tag on the region before allocating. Thus we |
|
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637 // safely know if this region is young. |
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|
638 if (is_young() && filter_young) { |
|
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639 return NULL; |
|
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640 } |
|
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|
641 |
| 1705 | 642 assert(!is_young(), "check value of filter_young"); |
| 643 | |
|
3317
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644 // We can only clean the card here, after we make the decision that |
|
063382f9b575
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645 // the card is not young. And we only clean the card if we have been |
|
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646 // asked to (i.e., card_ptr != NULL). |
|
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647 if (card_ptr != NULL) { |
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|
648 *card_ptr = CardTableModRefBS::clean_card_val(); |
|
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|
649 // We must complete this write before we do any of the reads below. |
|
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|
650 OrderAccess::storeload(); |
|
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651 } |
|
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|
652 |
| 342 | 653 // We used to use "block_start_careful" here. But we're actually happy |
| 654 // to update the BOT while we do this... | |
| 655 HeapWord* cur = block_start(mr.start()); | |
| 656 assert(cur <= mr.start(), "Postcondition"); | |
| 657 | |
| 658 while (cur <= mr.start()) { | |
|
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|
659 if (oop(cur)->klass_or_null() == NULL) { |
| 342 | 660 // Ran into an unparseable point. |
| 661 return cur; | |
| 662 } | |
| 663 // Otherwise... | |
| 664 int sz = oop(cur)->size(); | |
| 665 if (cur + sz > mr.start()) break; | |
| 666 // Otherwise, go on. | |
| 667 cur = cur + sz; | |
| 668 } | |
| 669 oop obj; | |
| 670 obj = oop(cur); | |
| 671 // If we finish this loop... | |
| 672 assert(cur <= mr.start() | |
|
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|
673 && obj->klass_or_null() != NULL |
| 342 | 674 && cur + obj->size() > mr.start(), |
| 675 "Loop postcondition"); | |
| 676 if (!g1h->is_obj_dead(obj)) { | |
| 677 obj->oop_iterate(cl, mr); | |
| 678 } | |
| 679 | |
| 680 HeapWord* next; | |
| 681 while (cur < mr.end()) { | |
| 682 obj = oop(cur); | |
|
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|
683 if (obj->klass_or_null() == NULL) { |
| 342 | 684 // Ran into an unparseable point. |
| 685 return cur; | |
| 686 }; | |
| 687 // Otherwise: | |
| 688 next = (cur + obj->size()); | |
| 689 if (!g1h->is_obj_dead(obj)) { | |
| 690 if (next < mr.end()) { | |
| 691 obj->oop_iterate(cl); | |
| 692 } else { | |
| 693 // this obj spans the boundary. If it's an array, stop at the | |
| 694 // boundary. | |
| 695 if (obj->is_objArray()) { | |
| 696 obj->oop_iterate(cl, mr); | |
| 697 } else { | |
| 698 obj->oop_iterate(cl); | |
| 699 } | |
| 700 } | |
| 701 } | |
| 702 cur = next; | |
| 703 } | |
| 704 return NULL; | |
| 705 } | |
| 706 | |
| 707 void HeapRegion::print() const { print_on(gclog_or_tty); } | |
| 708 void HeapRegion::print_on(outputStream* st) const { | |
| 709 if (isHumongous()) { | |
| 710 if (startsHumongous()) | |
| 711 st->print(" HS"); | |
| 712 else | |
| 713 st->print(" HC"); | |
| 714 } else { | |
| 715 st->print(" "); | |
| 716 } | |
| 717 if (in_collection_set()) | |
| 718 st->print(" CS"); | |
| 719 else | |
| 720 st->print(" "); | |
| 721 if (is_young()) | |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1388
diff
changeset
|
722 st->print(is_survivor() ? " SU" : " Y "); |
| 342 | 723 else |
| 724 st->print(" "); | |
| 725 if (is_empty()) | |
| 726 st->print(" F"); | |
| 727 else | |
| 728 st->print(" "); | |
|
1020
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
942
diff
changeset
|
729 st->print(" %5d", _gc_time_stamp); |
| 1388 | 730 st->print(" PTAMS "PTR_FORMAT" NTAMS "PTR_FORMAT, |
| 731 prev_top_at_mark_start(), next_top_at_mark_start()); | |
| 342 | 732 G1OffsetTableContigSpace::print_on(st); |
| 733 } | |
| 734 | |
| 811 | 735 void HeapRegion::verify(bool allow_dirty) const { |
|
1020
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
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942
diff
changeset
|
736 bool dummy = false; |
|
3772
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7004681: G1: Extend marking verification to Full GCs
johnc
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3766
diff
changeset
|
737 verify(allow_dirty, VerifyOption_G1UsePrevMarking, /* failures */ &dummy); |
| 811 | 738 } |
| 739 | |
| 342 | 740 // This really ought to be commoned up into OffsetTableContigSpace somehow. |
| 741 // We would need a mechanism to make that code skip dead objects. | |
| 742 | |
|
1020
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
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942
diff
changeset
|
743 void HeapRegion::verify(bool allow_dirty, |
|
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
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3766
diff
changeset
|
744 VerifyOption vo, |
|
1020
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
942
diff
changeset
|
745 bool* failures) const { |
| 342 | 746 G1CollectedHeap* g1 = G1CollectedHeap::heap(); |
|
1020
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diff
changeset
|
747 *failures = false; |
| 342 | 748 HeapWord* p = bottom(); |
| 749 HeapWord* prev_p = NULL; | |
|
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
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3766
diff
changeset
|
750 VerifyLiveClosure vl_cl(g1, vo); |
|
1718
bb847e31b836
6974928: G1: sometimes humongous objects are allocated in young regions
tonyp
parents:
1705
diff
changeset
|
751 bool is_humongous = isHumongous(); |
|
2133
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7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
752 bool do_bot_verify = !is_young(); |
|
1718
bb847e31b836
6974928: G1: sometimes humongous objects are allocated in young regions
tonyp
parents:
1705
diff
changeset
|
753 size_t object_num = 0; |
| 342 | 754 while (p < top()) { |
|
2133
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
755 oop obj = oop(p); |
|
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
756 size_t obj_size = obj->size(); |
|
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
757 object_num += 1; |
|
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
758 |
|
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
759 if (is_humongous != g1->isHumongous(obj_size)) { |
|
1718
bb847e31b836
6974928: G1: sometimes humongous objects are allocated in young regions
tonyp
parents:
1705
diff
changeset
|
760 gclog_or_tty->print_cr("obj "PTR_FORMAT" is of %shumongous size (" |
|
bb847e31b836
6974928: G1: sometimes humongous objects are allocated in young regions
tonyp
parents:
1705
diff
changeset
|
761 SIZE_FORMAT" words) in a %shumongous region", |
|
2133
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
762 p, g1->isHumongous(obj_size) ? "" : "non-", |
|
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
763 obj_size, is_humongous ? "" : "non-"); |
|
1718
bb847e31b836
6974928: G1: sometimes humongous objects are allocated in young regions
tonyp
parents:
1705
diff
changeset
|
764 *failures = true; |
|
2133
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
765 return; |
|
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
766 } |
|
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
767 |
|
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
768 // If it returns false, verify_for_object() will output the |
|
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
769 // appropriate messasge. |
|
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
770 if (do_bot_verify && !_offsets.verify_for_object(p, obj_size)) { |
|
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
771 *failures = true; |
|
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
772 return; |
|
1718
bb847e31b836
6974928: G1: sometimes humongous objects are allocated in young regions
tonyp
parents:
1705
diff
changeset
|
773 } |
|
2133
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
774 |
|
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
775 if (!g1->is_obj_dead_cond(obj, this, vo)) { |
|
2133
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
776 if (obj->is_oop()) { |
|
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
777 klassOop klass = obj->klass(); |
|
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
778 if (!klass->is_perm()) { |
|
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
779 gclog_or_tty->print_cr("klass "PTR_FORMAT" of object "PTR_FORMAT" " |
|
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
780 "not in perm", klass, obj); |
|
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
781 *failures = true; |
|
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
782 return; |
|
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
783 } else if (!klass->is_klass()) { |
|
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
784 gclog_or_tty->print_cr("klass "PTR_FORMAT" of object "PTR_FORMAT" " |
|
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
785 "not a klass", klass, obj); |
|
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
786 *failures = true; |
|
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
787 return; |
|
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
788 } else { |
|
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
789 vl_cl.set_containing_obj(obj); |
|
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
790 obj->oop_iterate(&vl_cl); |
|
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
791 if (vl_cl.failures()) { |
|
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
792 *failures = true; |
|
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
793 } |
|
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
794 if (G1MaxVerifyFailures >= 0 && |
|
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
795 vl_cl.n_failures() >= G1MaxVerifyFailures) { |
|
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
796 return; |
|
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1972
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|
797 } |
|
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|
798 } |
|
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diff
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|
799 } else { |
|
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|
800 gclog_or_tty->print_cr(PTR_FORMAT" no an oop", obj); |
|
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801 *failures = true; |
|
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
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parents:
942
diff
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|
802 return; |
|
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6882730: G1: parallel heap verification messes up region dump
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parents:
942
diff
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|
803 } |
| 342 | 804 } |
| 805 prev_p = p; | |
|
2133
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1972
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|
806 p += obj_size; |
|
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7007068: G1: refine the BOT during evac failure handling
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|
807 } |
|
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diff
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|
808 |
|
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|
809 if (p != top()) { |
|
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1972
diff
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|
810 gclog_or_tty->print_cr("end of last object "PTR_FORMAT" " |
|
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diff
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|
811 "does not match top "PTR_FORMAT, p, top()); |
|
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1972
diff
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|
812 *failures = true; |
|
2250ee17e258
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1972
diff
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|
813 return; |
| 342 | 814 } |
|
2133
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|
815 |
|
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|
816 HeapWord* the_end = end(); |
|
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diff
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|
817 assert(p == top(), "it should still hold"); |
|
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diff
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818 // Do some extra BOT consistency checking for addresses in the |
|
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819 // range [top, end). BOT look-ups in this range should yield |
|
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1972
diff
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|
820 // top. No point in doing that if top == end (there's nothing there). |
|
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|
821 if (p < the_end) { |
|
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diff
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|
822 // Look up top |
|
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|
823 HeapWord* addr_1 = p; |
|
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diff
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|
824 HeapWord* b_start_1 = _offsets.block_start_const(addr_1); |
|
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diff
changeset
|
825 if (b_start_1 != p) { |
|
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diff
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|
826 gclog_or_tty->print_cr("BOT look up for top: "PTR_FORMAT" " |
|
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diff
changeset
|
827 " yielded "PTR_FORMAT", expecting "PTR_FORMAT, |
|
2250ee17e258
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|
828 addr_1, b_start_1, p); |
|
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diff
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|
829 *failures = true; |
|
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diff
changeset
|
830 return; |
|
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diff
changeset
|
831 } |
|
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diff
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|
832 |
|
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|
833 // Look up top + 1 |
|
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|
834 HeapWord* addr_2 = p + 1; |
|
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|
835 if (addr_2 < the_end) { |
|
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836 HeapWord* b_start_2 = _offsets.block_start_const(addr_2); |
|
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diff
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|
837 if (b_start_2 != p) { |
|
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|
838 gclog_or_tty->print_cr("BOT look up for top + 1: "PTR_FORMAT" " |
|
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diff
changeset
|
839 " yielded "PTR_FORMAT", expecting "PTR_FORMAT, |
|
2250ee17e258
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changeset
|
840 addr_2, b_start_2, p); |
|
1020
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6882730: G1: parallel heap verification messes up region dump
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parents:
942
diff
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|
841 *failures = true; |
|
ff2402f6a50b
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parents:
942
diff
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|
842 return; |
|
2133
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|
843 } |
|
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|
844 } |
|
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diff
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|
845 |
|
2250ee17e258
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diff
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|
846 // Look up an address between top and end |
|
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diff
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|
847 size_t diff = pointer_delta(the_end, p) / 2; |
|
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diff
changeset
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848 HeapWord* addr_3 = p + diff; |
|
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diff
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|
849 if (addr_3 < the_end) { |
|
2250ee17e258
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1972
diff
changeset
|
850 HeapWord* b_start_3 = _offsets.block_start_const(addr_3); |
|
2250ee17e258
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1972
diff
changeset
|
851 if (b_start_3 != p) { |
|
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parents:
1972
diff
changeset
|
852 gclog_or_tty->print_cr("BOT look up for top + diff: "PTR_FORMAT" " |
|
2250ee17e258
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1972
diff
changeset
|
853 " yielded "PTR_FORMAT", expecting "PTR_FORMAT, |
|
2250ee17e258
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tonyp
parents:
1972
diff
changeset
|
854 addr_3, b_start_3, p); |
|
2250ee17e258
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1972
diff
changeset
|
855 *failures = true; |
|
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
856 return; |
|
2250ee17e258
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tonyp
parents:
1972
diff
changeset
|
857 } |
|
2250ee17e258
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parents:
1972
diff
changeset
|
858 } |
|
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parents:
1972
diff
changeset
|
859 |
|
2250ee17e258
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parents:
1972
diff
changeset
|
860 // Loook up end - 1 |
|
2250ee17e258
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1972
diff
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|
861 HeapWord* addr_4 = the_end - 1; |
|
2250ee17e258
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diff
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|
862 HeapWord* b_start_4 = _offsets.block_start_const(addr_4); |
|
2250ee17e258
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tonyp
parents:
1972
diff
changeset
|
863 if (b_start_4 != p) { |
|
2250ee17e258
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tonyp
parents:
1972
diff
changeset
|
864 gclog_or_tty->print_cr("BOT look up for end - 1: "PTR_FORMAT" " |
|
2250ee17e258
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1972
diff
changeset
|
865 " yielded "PTR_FORMAT", expecting "PTR_FORMAT, |
|
2250ee17e258
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parents:
1972
diff
changeset
|
866 addr_4, b_start_4, p); |
|
2250ee17e258
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1972
diff
changeset
|
867 *failures = true; |
|
2250ee17e258
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parents:
1972
diff
changeset
|
868 return; |
|
1020
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
942
diff
changeset
|
869 } |
| 342 | 870 } |
|
1020
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
942
diff
changeset
|
871 |
|
1718
bb847e31b836
6974928: G1: sometimes humongous objects are allocated in young regions
tonyp
parents:
1705
diff
changeset
|
872 if (is_humongous && object_num > 1) { |
|
bb847e31b836
6974928: G1: sometimes humongous objects are allocated in young regions
tonyp
parents:
1705
diff
changeset
|
873 gclog_or_tty->print_cr("region ["PTR_FORMAT","PTR_FORMAT"] is humongous " |
|
bb847e31b836
6974928: G1: sometimes humongous objects are allocated in young regions
tonyp
parents:
1705
diff
changeset
|
874 "but has "SIZE_FORMAT", objects", |
|
bb847e31b836
6974928: G1: sometimes humongous objects are allocated in young regions
tonyp
parents:
1705
diff
changeset
|
875 bottom(), end(), object_num); |
|
bb847e31b836
6974928: G1: sometimes humongous objects are allocated in young regions
tonyp
parents:
1705
diff
changeset
|
876 *failures = true; |
|
1020
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6882730: G1: parallel heap verification messes up region dump
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parents:
942
diff
changeset
|
877 return; |
| 342 | 878 } |
| 879 } | |
| 880 | |
| 881 // G1OffsetTableContigSpace code; copied from space.cpp. Hope this can go | |
| 882 // away eventually. | |
| 883 | |
| 356 | 884 void G1OffsetTableContigSpace::initialize(MemRegion mr, bool clear_space, bool mangle_space) { |
| 342 | 885 // false ==> we'll do the clearing if there's clearing to be done. |
| 356 | 886 ContiguousSpace::initialize(mr, false, mangle_space); |
| 342 | 887 _offsets.zero_bottom_entry(); |
| 888 _offsets.initialize_threshold(); | |
| 356 | 889 if (clear_space) clear(mangle_space); |
| 342 | 890 } |
| 891 | |
| 356 | 892 void G1OffsetTableContigSpace::clear(bool mangle_space) { |
| 893 ContiguousSpace::clear(mangle_space); | |
| 342 | 894 _offsets.zero_bottom_entry(); |
| 895 _offsets.initialize_threshold(); | |
| 896 } | |
| 897 | |
| 898 void G1OffsetTableContigSpace::set_bottom(HeapWord* new_bottom) { | |
| 899 Space::set_bottom(new_bottom); | |
| 900 _offsets.set_bottom(new_bottom); | |
| 901 } | |
| 902 | |
| 903 void G1OffsetTableContigSpace::set_end(HeapWord* new_end) { | |
| 904 Space::set_end(new_end); | |
| 905 _offsets.resize(new_end - bottom()); | |
| 906 } | |
| 907 | |
| 908 void G1OffsetTableContigSpace::print() const { | |
| 909 print_short(); | |
| 910 gclog_or_tty->print_cr(" [" INTPTR_FORMAT ", " INTPTR_FORMAT ", " | |
| 911 INTPTR_FORMAT ", " INTPTR_FORMAT ")", | |
| 912 bottom(), top(), _offsets.threshold(), end()); | |
| 913 } | |
| 914 | |
| 915 HeapWord* G1OffsetTableContigSpace::initialize_threshold() { | |
| 916 return _offsets.initialize_threshold(); | |
| 917 } | |
| 918 | |
| 919 HeapWord* G1OffsetTableContigSpace::cross_threshold(HeapWord* start, | |
| 920 HeapWord* end) { | |
| 921 _offsets.alloc_block(start, end); | |
| 922 return _offsets.threshold(); | |
| 923 } | |
| 924 | |
| 925 HeapWord* G1OffsetTableContigSpace::saved_mark_word() const { | |
| 926 G1CollectedHeap* g1h = G1CollectedHeap::heap(); | |
| 927 assert( _gc_time_stamp <= g1h->get_gc_time_stamp(), "invariant" ); | |
| 928 if (_gc_time_stamp < g1h->get_gc_time_stamp()) | |
| 929 return top(); | |
| 930 else | |
| 931 return ContiguousSpace::saved_mark_word(); | |
| 932 } | |
| 933 | |
| 934 void G1OffsetTableContigSpace::set_saved_mark() { | |
| 935 G1CollectedHeap* g1h = G1CollectedHeap::heap(); | |
| 936 unsigned curr_gc_time_stamp = g1h->get_gc_time_stamp(); | |
| 937 | |
| 938 if (_gc_time_stamp < curr_gc_time_stamp) { | |
| 939 // The order of these is important, as another thread might be | |
| 940 // about to start scanning this region. If it does so after | |
| 941 // set_saved_mark and before _gc_time_stamp = ..., then the latter | |
| 942 // will be false, and it will pick up top() as the high water mark | |
| 943 // of region. If it does so after _gc_time_stamp = ..., then it | |
| 944 // will pick up the right saved_mark_word() as the high water mark | |
| 945 // of the region. Either way, the behaviour will be correct. | |
| 946 ContiguousSpace::set_saved_mark(); | |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
947 OrderAccess::storestore(); |
|
353
9bb2c10ac07b
6723570: G1: assertion failure: p == current_top or oop(p)->is_oop(),"p is not a block start" (revisited!)
iveresov
parents:
342
diff
changeset
|
948 _gc_time_stamp = curr_gc_time_stamp; |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2152
diff
changeset
|
949 // No need to do another barrier to flush the writes above. If |
|
abdfc822206f
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tonyp
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2152
diff
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|
950 // this is called in parallel with other threads trying to |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
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2152
diff
changeset
|
951 // allocate into the region, the caller should call this while |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2152
diff
changeset
|
952 // holding a lock and when the lock is released the writes will be |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2152
diff
changeset
|
953 // flushed. |
| 342 | 954 } |
| 955 } | |
| 956 | |
| 957 G1OffsetTableContigSpace:: | |
| 958 G1OffsetTableContigSpace(G1BlockOffsetSharedArray* sharedOffsetArray, | |
| 959 MemRegion mr, bool is_zeroed) : | |
| 960 _offsets(sharedOffsetArray, mr), | |
| 961 _par_alloc_lock(Mutex::leaf, "OffsetTableContigSpace par alloc lock", true), | |
| 962 _gc_time_stamp(0) | |
| 963 { | |
| 964 _offsets.set_space(this); | |
| 356 | 965 initialize(mr, !is_zeroed, SpaceDecorator::Mangle); |
| 342 | 966 } |