Mercurial > hg > truffle
annotate src/share/vm/gc_implementation/g1/heapRegion.cpp @ 3772:6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
Summary: Perform a heap verification after the first phase of G1's full GC using objects' mark words to determine liveness. The third parameter of the heap verification routines, which was used in G1 to determine which marking bitmap to use in liveness calculations, has been changed from a boolean to an enum with values defined for using the mark word, and the 'prev' and 'next' bitmaps.
Reviewed-by: tonyp, ysr
| author | johnc |
|---|---|
| date | Tue, 14 Jun 2011 11:01:10 -0700 |
| parents | c3f1170908be |
| children | f44782f04dd4 |
| rev | line source |
|---|---|
| 342 | 1 /* |
|
2133
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
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 * | |
|
1552
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
1550
diff
changeset
|
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
|
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
1550
diff
changeset
|
20 * or visit www.oracle.com if you need additional information or have any |
|
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
1550
diff
changeset
|
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 |
|
942
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
parents:
866
diff
changeset
|
36 int HeapRegion::LogOfHRGrainBytes = 0; |
|
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
parents:
866
diff
changeset
|
37 int HeapRegion::LogOfHRGrainWords = 0; |
|
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
parents:
866
diff
changeset
|
38 int HeapRegion::GrainBytes = 0; |
|
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
parents:
866
diff
changeset
|
39 int HeapRegion::GrainWords = 0; |
|
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
parents:
866
diff
changeset
|
40 int HeapRegion::CardsPerRegion = 0; |
|
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
parents:
866
diff
changeset
|
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; | |
|
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
63 VerifyOption _vo; |
| 342 | 64 public: |
|
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
65 // _vo == UsePrevMarking -> use "prev" marking information, |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
66 // _vo == UseNextMarking -> use "next" marking information, |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
67 // _vo == UseMarkWord -> use mark word from object header. |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
68 VerifyLiveClosure(G1CollectedHeap* g1h, VerifyOption vo) : |
| 342 | 69 _g1h(g1h), _bs(NULL), _containing_obj(NULL), |
|
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
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 | |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
84 virtual void do_oop(narrowOop* p) { do_oop_work(p); } |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
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 | |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
97 template <class T> void do_oop_work(T* p) { |
| 342 | 98 assert(_containing_obj != NULL, "Precondition"); |
|
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
99 assert(!_g1h->is_obj_dead_cond(_containing_obj, _vo), |
| 811 | 100 "Precondition"); |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
101 T heap_oop = oopDesc::load_heap_oop(p); |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
102 if (!oopDesc::is_null(heap_oop)) { |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
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) || |
|
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
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()) { | |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
142 HeapRegion* from = _g1h->heap_region_containing((HeapWord*)p); |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
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 | |
|
942
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
parents:
866
diff
changeset
|
263 // Minimum region size; we won't go lower than that. |
|
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
parents:
866
diff
changeset
|
264 // We might want to decrease this in the future, to deal with small |
|
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
parents:
866
diff
changeset
|
265 // heaps a bit more efficiently. |
|
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
parents:
866
diff
changeset
|
266 #define MIN_REGION_SIZE ( 1024 * 1024 ) |
|
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
parents:
866
diff
changeset
|
267 |
|
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
parents:
866
diff
changeset
|
268 // Maximum region size; we don't go higher than that. There's a good |
|
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
parents:
866
diff
changeset
|
269 // reason for having an upper bound. We don't want regions to get too |
|
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
parents:
866
diff
changeset
|
270 // large, otherwise cleanup's effectiveness would decrease as there |
|
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
parents:
866
diff
changeset
|
271 // will be fewer opportunities to find totally empty regions after |
|
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
parents:
866
diff
changeset
|
272 // marking. |
|
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
parents:
866
diff
changeset
|
273 #define MAX_REGION_SIZE ( 32 * 1024 * 1024 ) |
|
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
parents:
866
diff
changeset
|
274 |
|
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
parents:
866
diff
changeset
|
275 // The automatic region size calculation will try to have around this |
|
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
parents:
866
diff
changeset
|
276 // many regions in the heap (based on the min heap size). |
|
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
parents:
866
diff
changeset
|
277 #define TARGET_REGION_NUMBER 2048 |
|
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
parents:
866
diff
changeset
|
278 |
|
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
parents:
866
diff
changeset
|
279 void HeapRegion::setup_heap_region_size(uintx min_heap_size) { |
|
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
parents:
866
diff
changeset
|
280 // region_size in bytes |
|
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
parents:
866
diff
changeset
|
281 uintx region_size = G1HeapRegionSize; |
|
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
parents:
866
diff
changeset
|
282 if (FLAG_IS_DEFAULT(G1HeapRegionSize)) { |
|
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
parents:
866
diff
changeset
|
283 // We base the automatic calculation on the min heap size. This |
|
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
parents:
866
diff
changeset
|
284 // can be problematic if the spread between min and max is quite |
|
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
parents:
866
diff
changeset
|
285 // wide, imagine -Xms128m -Xmx32g. But, if we decided it based on |
|
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
parents:
866
diff
changeset
|
286 // the max size, the region size might be way too large for the |
|
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
parents:
866
diff
changeset
|
287 // min size. Either way, some users might have to set the region |
|
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
parents:
866
diff
changeset
|
288 // size manually for some -Xms / -Xmx combos. |
|
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
parents:
866
diff
changeset
|
289 |
|
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
parents:
866
diff
changeset
|
290 region_size = MAX2(min_heap_size / TARGET_REGION_NUMBER, |
|
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
parents:
866
diff
changeset
|
291 (uintx) MIN_REGION_SIZE); |
|
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
parents:
866
diff
changeset
|
292 } |
|
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
parents:
866
diff
changeset
|
293 |
|
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
parents:
866
diff
changeset
|
294 int region_size_log = log2_long((jlong) region_size); |
|
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
parents:
866
diff
changeset
|
295 // Recalculate the region size to make sure it's a power of |
|
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
parents:
866
diff
changeset
|
296 // 2. This means that region_size is the largest power of 2 that's |
|
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
parents:
866
diff
changeset
|
297 // <= what we've calculated so far. |
|
1485
fb57d4cf76c2
6931180: Migration to recent versions of MS Platform SDK
prr
parents:
1394
diff
changeset
|
298 region_size = ((uintx)1 << region_size_log); |
|
942
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
parents:
866
diff
changeset
|
299 |
|
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
parents:
866
diff
changeset
|
300 // Now make sure that we don't go over or under our limits. |
|
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
parents:
866
diff
changeset
|
301 if (region_size < MIN_REGION_SIZE) { |
|
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
parents:
866
diff
changeset
|
302 region_size = MIN_REGION_SIZE; |
|
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
parents:
866
diff
changeset
|
303 } else if (region_size > MAX_REGION_SIZE) { |
|
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
parents:
866
diff
changeset
|
304 region_size = MAX_REGION_SIZE; |
|
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
parents:
866
diff
changeset
|
305 } |
|
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
parents:
866
diff
changeset
|
306 |
|
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
parents:
866
diff
changeset
|
307 // And recalculate the log. |
|
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
parents:
866
diff
changeset
|
308 region_size_log = log2_long((jlong) region_size); |
|
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
parents:
866
diff
changeset
|
309 |
|
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
parents:
866
diff
changeset
|
310 // Now, set up the globals. |
|
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
parents:
866
diff
changeset
|
311 guarantee(LogOfHRGrainBytes == 0, "we should only set it once"); |
|
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
parents:
866
diff
changeset
|
312 LogOfHRGrainBytes = region_size_log; |
|
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
parents:
866
diff
changeset
|
313 |
|
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
parents:
866
diff
changeset
|
314 guarantee(LogOfHRGrainWords == 0, "we should only set it once"); |
|
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
parents:
866
diff
changeset
|
315 LogOfHRGrainWords = LogOfHRGrainBytes - LogHeapWordSize; |
|
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
parents:
866
diff
changeset
|
316 |
|
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
parents:
866
diff
changeset
|
317 guarantee(GrainBytes == 0, "we should only set it once"); |
|
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
parents:
866
diff
changeset
|
318 // The cast to int is safe, given that we've bounded region_size by |
|
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
parents:
866
diff
changeset
|
319 // MIN_REGION_SIZE and MAX_REGION_SIZE. |
|
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
parents:
866
diff
changeset
|
320 GrainBytes = (int) region_size; |
|
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
parents:
866
diff
changeset
|
321 |
|
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
parents:
866
diff
changeset
|
322 guarantee(GrainWords == 0, "we should only set it once"); |
|
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
parents:
866
diff
changeset
|
323 GrainWords = GrainBytes >> LogHeapWordSize; |
|
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
parents:
866
diff
changeset
|
324 guarantee(1 << LogOfHRGrainWords == GrainWords, "sanity"); |
|
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
parents:
866
diff
changeset
|
325 |
|
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
parents:
866
diff
changeset
|
326 guarantee(CardsPerRegion == 0, "we should only set it once"); |
|
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
parents:
866
diff
changeset
|
327 CardsPerRegion = GrainBytes >> CardTableModRefBS::card_shift; |
|
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
parents:
866
diff
changeset
|
328 } |
|
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
parents:
866
diff
changeset
|
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 _is_gc_alloc_region = false; | |
| 356 | |
| 357 set_young_index_in_cset(-1); | |
| 358 uninstall_surv_rate_group(); | |
| 359 set_young_type(NotYoung); | |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2152
diff
changeset
|
360 reset_pre_dummy_top(); |
| 342 | 361 |
| 362 if (!par) { | |
| 363 // If this is parallel, this will be done later. | |
| 364 HeapRegionRemSet* hrrs = rem_set(); | |
| 365 if (hrrs != NULL) hrrs->clear(); | |
| 355 | 366 _claimed = InitialClaimValue; |
| 342 | 367 } |
| 368 zero_marked_bytes(); | |
| 369 set_sort_index(-1); | |
| 370 | |
| 371 _offsets.resize(HeapRegion::GrainWords); | |
| 372 init_top_at_mark_start(); | |
| 356 | 373 if (clear_space) clear(SpaceDecorator::Mangle); |
| 342 | 374 } |
| 375 | |
|
3317
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
2433
diff
changeset
|
376 void HeapRegion::par_clear() { |
|
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
2433
diff
changeset
|
377 assert(used() == 0, "the region should have been already cleared"); |
|
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
2433
diff
changeset
|
378 assert(capacity() == (size_t) HeapRegion::GrainBytes, |
|
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
2433
diff
changeset
|
379 "should be back to normal"); |
|
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
2433
diff
changeset
|
380 HeapRegionRemSet* hrrs = rem_set(); |
|
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
2433
diff
changeset
|
381 hrrs->clear(); |
|
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
2433
diff
changeset
|
382 CardTableModRefBS* ct_bs = |
|
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
2433
diff
changeset
|
383 (CardTableModRefBS*)G1CollectedHeap::heap()->barrier_set(); |
|
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
2433
diff
changeset
|
384 ct_bs->clear(MemRegion(bottom(), end())); |
|
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
2433
diff
changeset
|
385 } |
|
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
2433
diff
changeset
|
386 |
| 342 | 387 // <PREDICTION> |
| 388 void HeapRegion::calc_gc_efficiency() { | |
| 389 G1CollectedHeap* g1h = G1CollectedHeap::heap(); | |
| 390 _gc_efficiency = (double) garbage_bytes() / | |
| 391 g1h->predict_region_elapsed_time_ms(this, false); | |
| 392 } | |
| 393 // </PREDICTION> | |
| 394 | |
|
2133
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
395 void HeapRegion::set_startsHumongous(HeapWord* new_top, HeapWord* new_end) { |
| 2152 | 396 assert(!isHumongous(), "sanity / pre-condition"); |
|
1886
72a161e62cc4
6991377: G1: race between concurrent refinement and humongous object allocation
tonyp
parents:
1718
diff
changeset
|
397 assert(end() == _orig_end, |
|
72a161e62cc4
6991377: G1: race between concurrent refinement and humongous object allocation
tonyp
parents:
1718
diff
changeset
|
398 "Should be normal before the humongous object allocation"); |
|
72a161e62cc4
6991377: G1: race between concurrent refinement and humongous object allocation
tonyp
parents:
1718
diff
changeset
|
399 assert(top() == bottom(), "should be empty"); |
|
2133
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
400 assert(bottom() <= new_top && new_top <= new_end, "pre-condition"); |
|
1886
72a161e62cc4
6991377: G1: race between concurrent refinement and humongous object allocation
tonyp
parents:
1718
diff
changeset
|
401 |
| 355 | 402 _humongous_type = StartsHumongous; |
| 342 | 403 _humongous_start_region = this; |
|
1886
72a161e62cc4
6991377: G1: race between concurrent refinement and humongous object allocation
tonyp
parents:
1718
diff
changeset
|
404 |
|
72a161e62cc4
6991377: G1: race between concurrent refinement and humongous object allocation
tonyp
parents:
1718
diff
changeset
|
405 set_end(new_end); |
|
2133
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
406 _offsets.set_for_starts_humongous(new_top); |
|
1886
72a161e62cc4
6991377: G1: race between concurrent refinement and humongous object allocation
tonyp
parents:
1718
diff
changeset
|
407 } |
|
72a161e62cc4
6991377: G1: race between concurrent refinement and humongous object allocation
tonyp
parents:
1718
diff
changeset
|
408 |
|
2133
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
409 void HeapRegion::set_continuesHumongous(HeapRegion* first_hr) { |
| 2152 | 410 assert(!isHumongous(), "sanity / pre-condition"); |
|
1886
72a161e62cc4
6991377: G1: race between concurrent refinement and humongous object allocation
tonyp
parents:
1718
diff
changeset
|
411 assert(end() == _orig_end, |
|
72a161e62cc4
6991377: G1: race between concurrent refinement and humongous object allocation
tonyp
parents:
1718
diff
changeset
|
412 "Should be normal before the humongous object allocation"); |
|
72a161e62cc4
6991377: G1: race between concurrent refinement and humongous object allocation
tonyp
parents:
1718
diff
changeset
|
413 assert(top() == bottom(), "should be empty"); |
|
2133
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
414 assert(first_hr->startsHumongous(), "pre-condition"); |
|
1886
72a161e62cc4
6991377: G1: race between concurrent refinement and humongous object allocation
tonyp
parents:
1718
diff
changeset
|
415 |
|
72a161e62cc4
6991377: G1: race between concurrent refinement and humongous object allocation
tonyp
parents:
1718
diff
changeset
|
416 _humongous_type = ContinuesHumongous; |
|
2133
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
417 _humongous_start_region = first_hr; |
| 342 | 418 } |
| 419 | |
| 2152 | 420 void HeapRegion::set_notHumongous() { |
| 421 assert(isHumongous(), "pre-condition"); | |
| 422 | |
| 423 if (startsHumongous()) { | |
| 424 assert(top() <= end(), "pre-condition"); | |
| 425 set_end(_orig_end); | |
| 426 if (top() > end()) { | |
| 427 // at least one "continues humongous" region after it | |
| 428 set_top(end()); | |
| 429 } | |
| 430 } else { | |
| 431 // continues humongous | |
| 432 assert(end() == _orig_end, "sanity"); | |
| 433 } | |
| 434 | |
| 435 assert(capacity() == (size_t) HeapRegion::GrainBytes, "pre-condition"); | |
| 436 _humongous_type = NotHumongous; | |
| 437 _humongous_start_region = NULL; | |
| 438 } | |
| 439 | |
| 342 | 440 bool HeapRegion::claimHeapRegion(jint claimValue) { |
| 441 jint current = _claimed; | |
| 442 if (current != claimValue) { | |
| 443 jint res = Atomic::cmpxchg(claimValue, &_claimed, current); | |
| 444 if (res == current) { | |
| 445 return true; | |
| 446 } | |
| 447 } | |
| 448 return false; | |
| 449 } | |
| 450 | |
| 451 HeapWord* HeapRegion::next_block_start_careful(HeapWord* addr) { | |
| 452 HeapWord* low = addr; | |
| 453 HeapWord* high = end(); | |
| 454 while (low < high) { | |
| 455 size_t diff = pointer_delta(high, low); | |
| 456 // Must add one below to bias toward the high amount. Otherwise, if | |
| 457 // "high" were at the desired value, and "low" were one less, we | |
| 458 // would not converge on "high". This is not symmetric, because | |
| 459 // we set "high" to a block start, which might be the right one, | |
| 460 // which we don't do for "low". | |
| 461 HeapWord* middle = low + (diff+1)/2; | |
| 462 if (middle == high) return high; | |
| 463 HeapWord* mid_bs = block_start_careful(middle); | |
| 464 if (mid_bs < addr) { | |
| 465 low = middle; | |
| 466 } else { | |
| 467 high = mid_bs; | |
| 468 } | |
| 469 } | |
| 470 assert(low == high && low >= addr, "Didn't work."); | |
| 471 return low; | |
| 472 } | |
| 473 | |
| 356 | 474 void HeapRegion::initialize(MemRegion mr, bool clear_space, bool mangle_space) { |
| 475 G1OffsetTableContigSpace::initialize(mr, false, mangle_space); | |
| 342 | 476 hr_clear(false/*par*/, clear_space); |
| 477 } | |
| 478 #ifdef _MSC_VER // the use of 'this' below gets a warning, make it go away | |
| 479 #pragma warning( disable:4355 ) // 'this' : used in base member initializer list | |
| 480 #endif // _MSC_VER | |
| 481 | |
| 482 | |
| 483 HeapRegion:: | |
| 3766 | 484 HeapRegion(size_t hrs_index, G1BlockOffsetSharedArray* sharedOffsetArray, |
| 485 MemRegion mr, bool is_zeroed) | |
| 342 | 486 : G1OffsetTableContigSpace(sharedOffsetArray, mr, is_zeroed), |
| 3766 | 487 _next_fk(HeapRegionDCTOC::NoFilterKind), _hrs_index(hrs_index), |
| 355 | 488 _humongous_type(NotHumongous), _humongous_start_region(NULL), |
| 342 | 489 _in_collection_set(false), _is_gc_alloc_region(false), |
| 490 _next_in_special_set(NULL), _orig_end(NULL), | |
| 355 | 491 _claimed(InitialClaimValue), _evacuation_failed(false), |
| 342 | 492 _prev_marked_bytes(0), _next_marked_bytes(0), _sort_index(-1), |
| 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), | |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1388
diff
changeset
|
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() | |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
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); | |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
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, | |
|
1666
5cbac8938c4c
6956639: G1: assert(cached_ptr != card_ptr) failed: shouldn't be, concurrentG1Refine.cpp:307
johnc
parents:
1552
diff
changeset
|
609 FilterOutOfRegionClosure* cl, |
|
3317
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
2433
diff
changeset
|
610 bool filter_young, |
|
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
2433
diff
changeset
|
611 jbyte* card_ptr) { |
|
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
2433
diff
changeset
|
612 // Currently, we should only have to clean the card if filter_young |
|
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
2433
diff
changeset
|
613 // is true and vice versa. |
|
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
2433
diff
changeset
|
614 if (filter_young) { |
|
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
2433
diff
changeset
|
615 assert(card_ptr != NULL, "pre-condition"); |
|
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
2433
diff
changeset
|
616 } else { |
|
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
2433
diff
changeset
|
617 assert(card_ptr == NULL, "pre-condition"); |
|
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
2433
diff
changeset
|
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 | |
|
1666
5cbac8938c4c
6956639: G1: assert(cached_ptr != card_ptr) failed: shouldn't be, concurrentG1Refine.cpp:307
johnc
parents:
1552
diff
changeset
|
632 // The intersection of the incoming mr (for the card) and the |
|
5cbac8938c4c
6956639: G1: assert(cached_ptr != card_ptr) failed: shouldn't be, concurrentG1Refine.cpp:307
johnc
parents:
1552
diff
changeset
|
633 // allocated part of the region is non-empty. This implies that |
|
5cbac8938c4c
6956639: G1: assert(cached_ptr != card_ptr) failed: shouldn't be, concurrentG1Refine.cpp:307
johnc
parents:
1552
diff
changeset
|
634 // we have actually allocated into this region. The code in |
|
5cbac8938c4c
6956639: G1: assert(cached_ptr != card_ptr) failed: shouldn't be, concurrentG1Refine.cpp:307
johnc
parents:
1552
diff
changeset
|
635 // G1CollectedHeap.cpp that allocates a new region sets the |
|
5cbac8938c4c
6956639: G1: assert(cached_ptr != card_ptr) failed: shouldn't be, concurrentG1Refine.cpp:307
johnc
parents:
1552
diff
changeset
|
636 // is_young tag on the region before allocating. Thus we |
|
5cbac8938c4c
6956639: G1: assert(cached_ptr != card_ptr) failed: shouldn't be, concurrentG1Refine.cpp:307
johnc
parents:
1552
diff
changeset
|
637 // safely know if this region is young. |
|
5cbac8938c4c
6956639: G1: assert(cached_ptr != card_ptr) failed: shouldn't be, concurrentG1Refine.cpp:307
johnc
parents:
1552
diff
changeset
|
638 if (is_young() && filter_young) { |
|
5cbac8938c4c
6956639: G1: assert(cached_ptr != card_ptr) failed: shouldn't be, concurrentG1Refine.cpp:307
johnc
parents:
1552
diff
changeset
|
639 return NULL; |
|
5cbac8938c4c
6956639: G1: assert(cached_ptr != card_ptr) failed: shouldn't be, concurrentG1Refine.cpp:307
johnc
parents:
1552
diff
changeset
|
640 } |
|
5cbac8938c4c
6956639: G1: assert(cached_ptr != card_ptr) failed: shouldn't be, concurrentG1Refine.cpp:307
johnc
parents:
1552
diff
changeset
|
641 |
| 1705 | 642 assert(!is_young(), "check value of filter_young"); |
| 643 | |
|
3317
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
2433
diff
changeset
|
644 // We can only clean the card here, after we make the decision that |
|
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
2433
diff
changeset
|
645 // the card is not young. And we only clean the card if we have been |
|
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
2433
diff
changeset
|
646 // asked to (i.e., card_ptr != NULL). |
|
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
2433
diff
changeset
|
647 if (card_ptr != NULL) { |
|
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
2433
diff
changeset
|
648 *card_ptr = CardTableModRefBS::clean_card_val(); |
|
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
2433
diff
changeset
|
649 // We must complete this write before we do any of the reads below. |
|
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
2433
diff
changeset
|
650 OrderAccess::storeload(); |
|
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
2433
diff
changeset
|
651 } |
|
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
2433
diff
changeset
|
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()) { | |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
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() | |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
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); | |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
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 if (is_gc_alloc_region()) | |
| 720 st->print(" A "); | |
| 721 else | |
| 722 st->print(" "); | |
| 723 if (is_young()) | |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1388
diff
changeset
|
724 st->print(is_survivor() ? " SU" : " Y "); |
| 342 | 725 else |
| 726 st->print(" "); | |
| 727 if (is_empty()) | |
| 728 st->print(" F"); | |
| 729 else | |
| 730 st->print(" "); | |
|
1020
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
942
diff
changeset
|
731 st->print(" %5d", _gc_time_stamp); |
| 1388 | 732 st->print(" PTAMS "PTR_FORMAT" NTAMS "PTR_FORMAT, |
| 733 prev_top_at_mark_start(), next_top_at_mark_start()); | |
| 342 | 734 G1OffsetTableContigSpace::print_on(st); |
| 735 } | |
| 736 | |
| 811 | 737 void HeapRegion::verify(bool allow_dirty) const { |
|
1020
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
942
diff
changeset
|
738 bool dummy = false; |
|
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
739 verify(allow_dirty, VerifyOption_G1UsePrevMarking, /* failures */ &dummy); |
| 811 | 740 } |
| 741 | |
| 342 | 742 // This really ought to be commoned up into OffsetTableContigSpace somehow. |
| 743 // We would need a mechanism to make that code skip dead objects. | |
| 744 | |
|
1020
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
942
diff
changeset
|
745 void HeapRegion::verify(bool allow_dirty, |
|
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
746 VerifyOption vo, |
|
1020
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
942
diff
changeset
|
747 bool* failures) const { |
| 342 | 748 G1CollectedHeap* g1 = G1CollectedHeap::heap(); |
|
1020
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
942
diff
changeset
|
749 *failures = false; |
| 342 | 750 HeapWord* p = bottom(); |
| 751 HeapWord* prev_p = NULL; | |
|
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
752 VerifyLiveClosure vl_cl(g1, vo); |
|
1718
bb847e31b836
6974928: G1: sometimes humongous objects are allocated in young regions
tonyp
parents:
1705
diff
changeset
|
753 bool is_humongous = isHumongous(); |
|
2133
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
754 bool do_bot_verify = !is_young(); |
|
1718
bb847e31b836
6974928: G1: sometimes humongous objects are allocated in young regions
tonyp
parents:
1705
diff
changeset
|
755 size_t object_num = 0; |
| 342 | 756 while (p < top()) { |
|
2133
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
757 oop obj = oop(p); |
|
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
758 size_t obj_size = obj->size(); |
|
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
759 object_num += 1; |
|
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
760 |
|
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
761 if (is_humongous != g1->isHumongous(obj_size)) { |
|
1718
bb847e31b836
6974928: G1: sometimes humongous objects are allocated in young regions
tonyp
parents:
1705
diff
changeset
|
762 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
|
763 SIZE_FORMAT" words) in a %shumongous region", |
|
2133
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
764 p, g1->isHumongous(obj_size) ? "" : "non-", |
|
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
765 obj_size, is_humongous ? "" : "non-"); |
|
1718
bb847e31b836
6974928: G1: sometimes humongous objects are allocated in young regions
tonyp
parents:
1705
diff
changeset
|
766 *failures = true; |
|
2133
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
767 return; |
|
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
768 } |
|
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
769 |
|
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
770 // 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
|
771 // appropriate messasge. |
|
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
772 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
|
773 *failures = true; |
|
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
774 return; |
|
1718
bb847e31b836
6974928: G1: sometimes humongous objects are allocated in young regions
tonyp
parents:
1705
diff
changeset
|
775 } |
|
2133
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
776 |
|
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
777 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
|
778 if (obj->is_oop()) { |
|
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
779 klassOop klass = obj->klass(); |
|
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
780 if (!klass->is_perm()) { |
|
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
781 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
|
782 "not in perm", klass, obj); |
|
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
783 *failures = true; |
|
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
784 return; |
|
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
785 } else if (!klass->is_klass()) { |
|
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
786 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
|
787 "not a klass", klass, obj); |
|
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
788 *failures = true; |
|
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
789 return; |
|
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
790 } else { |
|
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
791 vl_cl.set_containing_obj(obj); |
|
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
792 obj->oop_iterate(&vl_cl); |
|
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
793 if (vl_cl.failures()) { |
|
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
794 *failures = true; |
|
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
795 } |
|
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
796 if (G1MaxVerifyFailures >= 0 && |
|
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
797 vl_cl.n_failures() >= G1MaxVerifyFailures) { |
|
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
798 return; |
|
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
799 } |
|
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
800 } |
|
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
801 } else { |
|
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
802 gclog_or_tty->print_cr(PTR_FORMAT" no an oop", obj); |
|
1020
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
942
diff
changeset
|
803 *failures = true; |
|
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
942
diff
changeset
|
804 return; |
|
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
942
diff
changeset
|
805 } |
| 342 | 806 } |
| 807 prev_p = p; | |
|
2133
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
808 p += obj_size; |
|
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
809 } |
|
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
810 |
|
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
811 if (p != top()) { |
|
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
812 gclog_or_tty->print_cr("end of last object "PTR_FORMAT" " |
|
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
813 "does not match top "PTR_FORMAT, p, top()); |
|
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
814 *failures = true; |
|
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
815 return; |
| 342 | 816 } |
|
2133
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
817 |
|
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
818 HeapWord* the_end = end(); |
|
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
819 assert(p == top(), "it should still hold"); |
|
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
820 // Do some extra BOT consistency checking for addresses in the |
|
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
821 // range [top, end). BOT look-ups in this range should yield |
|
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
822 // top. No point in doing that if top == end (there's nothing there). |
|
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
823 if (p < the_end) { |
|
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
824 // Look up top |
|
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
825 HeapWord* addr_1 = p; |
|
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
826 HeapWord* b_start_1 = _offsets.block_start_const(addr_1); |
|
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
827 if (b_start_1 != p) { |
|
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
828 gclog_or_tty->print_cr("BOT look up for top: "PTR_FORMAT" " |
|
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
829 " yielded "PTR_FORMAT", expecting "PTR_FORMAT, |
|
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
830 addr_1, b_start_1, p); |
|
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
831 *failures = true; |
|
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
832 return; |
|
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
833 } |
|
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
834 |
|
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
835 // Look up top + 1 |
|
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
836 HeapWord* addr_2 = p + 1; |
|
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
837 if (addr_2 < the_end) { |
|
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
838 HeapWord* b_start_2 = _offsets.block_start_const(addr_2); |
|
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
839 if (b_start_2 != p) { |
|
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
840 gclog_or_tty->print_cr("BOT look up for top + 1: "PTR_FORMAT" " |
|
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
841 " yielded "PTR_FORMAT", expecting "PTR_FORMAT, |
|
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
842 addr_2, b_start_2, p); |
|
1020
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
942
diff
changeset
|
843 *failures = true; |
|
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
942
diff
changeset
|
844 return; |
|
2133
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
845 } |
|
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
846 } |
|
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
847 |
|
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
848 // Look up an address between top and end |
|
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
849 size_t diff = pointer_delta(the_end, p) / 2; |
|
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
850 HeapWord* addr_3 = p + diff; |
|
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
851 if (addr_3 < the_end) { |
|
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
852 HeapWord* b_start_3 = _offsets.block_start_const(addr_3); |
|
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
853 if (b_start_3 != p) { |
|
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
854 gclog_or_tty->print_cr("BOT look up for top + diff: "PTR_FORMAT" " |
|
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
855 " yielded "PTR_FORMAT", expecting "PTR_FORMAT, |
|
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
856 addr_3, b_start_3, p); |
|
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
857 *failures = true; |
|
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
858 return; |
|
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
859 } |
|
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
860 } |
|
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
861 |
|
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
862 // Loook up end - 1 |
|
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
863 HeapWord* addr_4 = the_end - 1; |
|
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
864 HeapWord* b_start_4 = _offsets.block_start_const(addr_4); |
|
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
865 if (b_start_4 != p) { |
|
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
866 gclog_or_tty->print_cr("BOT look up for end - 1: "PTR_FORMAT" " |
|
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
867 " yielded "PTR_FORMAT", expecting "PTR_FORMAT, |
|
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
868 addr_4, b_start_4, p); |
|
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
869 *failures = true; |
|
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
870 return; |
|
1020
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
942
diff
changeset
|
871 } |
| 342 | 872 } |
|
1020
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
942
diff
changeset
|
873 |
|
1718
bb847e31b836
6974928: G1: sometimes humongous objects are allocated in young regions
tonyp
parents:
1705
diff
changeset
|
874 if (is_humongous && object_num > 1) { |
|
bb847e31b836
6974928: G1: sometimes humongous objects are allocated in young regions
tonyp
parents:
1705
diff
changeset
|
875 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
|
876 "but has "SIZE_FORMAT", objects", |
|
bb847e31b836
6974928: G1: sometimes humongous objects are allocated in young regions
tonyp
parents:
1705
diff
changeset
|
877 bottom(), end(), object_num); |
|
bb847e31b836
6974928: G1: sometimes humongous objects are allocated in young regions
tonyp
parents:
1705
diff
changeset
|
878 *failures = true; |
|
1020
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
942
diff
changeset
|
879 return; |
| 342 | 880 } |
| 881 } | |
| 882 | |
| 883 // G1OffsetTableContigSpace code; copied from space.cpp. Hope this can go | |
| 884 // away eventually. | |
| 885 | |
| 356 | 886 void G1OffsetTableContigSpace::initialize(MemRegion mr, bool clear_space, bool mangle_space) { |
| 342 | 887 // false ==> we'll do the clearing if there's clearing to be done. |
| 356 | 888 ContiguousSpace::initialize(mr, false, mangle_space); |
| 342 | 889 _offsets.zero_bottom_entry(); |
| 890 _offsets.initialize_threshold(); | |
| 356 | 891 if (clear_space) clear(mangle_space); |
| 342 | 892 } |
| 893 | |
| 356 | 894 void G1OffsetTableContigSpace::clear(bool mangle_space) { |
| 895 ContiguousSpace::clear(mangle_space); | |
| 342 | 896 _offsets.zero_bottom_entry(); |
| 897 _offsets.initialize_threshold(); | |
| 898 } | |
| 899 | |
| 900 void G1OffsetTableContigSpace::set_bottom(HeapWord* new_bottom) { | |
| 901 Space::set_bottom(new_bottom); | |
| 902 _offsets.set_bottom(new_bottom); | |
| 903 } | |
| 904 | |
| 905 void G1OffsetTableContigSpace::set_end(HeapWord* new_end) { | |
| 906 Space::set_end(new_end); | |
| 907 _offsets.resize(new_end - bottom()); | |
| 908 } | |
| 909 | |
| 910 void G1OffsetTableContigSpace::print() const { | |
| 911 print_short(); | |
| 912 gclog_or_tty->print_cr(" [" INTPTR_FORMAT ", " INTPTR_FORMAT ", " | |
| 913 INTPTR_FORMAT ", " INTPTR_FORMAT ")", | |
| 914 bottom(), top(), _offsets.threshold(), end()); | |
| 915 } | |
| 916 | |
| 917 HeapWord* G1OffsetTableContigSpace::initialize_threshold() { | |
| 918 return _offsets.initialize_threshold(); | |
| 919 } | |
| 920 | |
| 921 HeapWord* G1OffsetTableContigSpace::cross_threshold(HeapWord* start, | |
| 922 HeapWord* end) { | |
| 923 _offsets.alloc_block(start, end); | |
| 924 return _offsets.threshold(); | |
| 925 } | |
| 926 | |
| 927 HeapWord* G1OffsetTableContigSpace::saved_mark_word() const { | |
| 928 G1CollectedHeap* g1h = G1CollectedHeap::heap(); | |
| 929 assert( _gc_time_stamp <= g1h->get_gc_time_stamp(), "invariant" ); | |
| 930 if (_gc_time_stamp < g1h->get_gc_time_stamp()) | |
| 931 return top(); | |
| 932 else | |
| 933 return ContiguousSpace::saved_mark_word(); | |
| 934 } | |
| 935 | |
| 936 void G1OffsetTableContigSpace::set_saved_mark() { | |
| 937 G1CollectedHeap* g1h = G1CollectedHeap::heap(); | |
| 938 unsigned curr_gc_time_stamp = g1h->get_gc_time_stamp(); | |
| 939 | |
| 940 if (_gc_time_stamp < curr_gc_time_stamp) { | |
| 941 // The order of these is important, as another thread might be | |
| 942 // about to start scanning this region. If it does so after | |
| 943 // set_saved_mark and before _gc_time_stamp = ..., then the latter | |
| 944 // will be false, and it will pick up top() as the high water mark | |
| 945 // of region. If it does so after _gc_time_stamp = ..., then it | |
| 946 // will pick up the right saved_mark_word() as the high water mark | |
| 947 // of the region. Either way, the behaviour will be correct. | |
| 948 ContiguousSpace::set_saved_mark(); | |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
949 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
|
950 _gc_time_stamp = curr_gc_time_stamp; |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2152
diff
changeset
|
951 // No need to do another barrier to flush the writes above. If |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2152
diff
changeset
|
952 // this is called in parallel with other threads trying to |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2152
diff
changeset
|
953 // 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
|
954 // 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
|
955 // flushed. |
| 342 | 956 } |
| 957 } | |
| 958 | |
| 959 G1OffsetTableContigSpace:: | |
| 960 G1OffsetTableContigSpace(G1BlockOffsetSharedArray* sharedOffsetArray, | |
| 961 MemRegion mr, bool is_zeroed) : | |
| 962 _offsets(sharedOffsetArray, mr), | |
| 963 _par_alloc_lock(Mutex::leaf, "OffsetTableContigSpace par alloc lock", true), | |
| 964 _gc_time_stamp(0) | |
| 965 { | |
| 966 _offsets.set_space(this); | |
| 356 | 967 initialize(mr, !is_zeroed, SpaceDecorator::Mangle); |
| 342 | 968 } |