Mercurial > hg > truffle
annotate src/share/vm/gc_implementation/g1/heapRegion.cpp @ 8502:ff4fa8b0516e
-Create push patch
author | Christos Kotselidis <christos.kotselidis@oracle.com> |
---|---|
date | Wed, 20 Mar 2013 20:13:08 +0100 |
parents | e522a00b91aa |
children | c92949b1ec8a |
rev | line source |
---|---|
342 | 1 /* |
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4725
diff
changeset
|
2 * Copyright (c) 2001, 2012, 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 |
3986
65a8ff39a6da
7095194: G1: HeapRegion::GrainBytes, GrainWords, and CardsPerRegion should be size_t
johnc
parents:
3983
diff
changeset
|
36 int HeapRegion::LogOfHRGrainBytes = 0; |
65a8ff39a6da
7095194: G1: HeapRegion::GrainBytes, GrainWords, and CardsPerRegion should be size_t
johnc
parents:
3983
diff
changeset
|
37 int HeapRegion::LogOfHRGrainWords = 0; |
65a8ff39a6da
7095194: G1: HeapRegion::GrainBytes, GrainWords, and CardsPerRegion should be size_t
johnc
parents:
3983
diff
changeset
|
38 size_t HeapRegion::GrainBytes = 0; |
65a8ff39a6da
7095194: G1: HeapRegion::GrainBytes, GrainWords, and CardsPerRegion should be size_t
johnc
parents:
3983
diff
changeset
|
39 size_t HeapRegion::GrainWords = 0; |
65a8ff39a6da
7095194: G1: HeapRegion::GrainBytes, GrainWords, and CardsPerRegion should be size_t
johnc
parents:
3983
diff
changeset
|
40 size_t HeapRegion::CardsPerRegion = 0; |
942
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
parents:
866
diff
changeset
|
41 |
342 | 42 HeapRegionDCTOC::HeapRegionDCTOC(G1CollectedHeap* g1, |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6611
diff
changeset
|
43 HeapRegion* hr, ExtendedOopClosure* cl, |
342 | 44 CardTableModRefBS::PrecisionStyle precision, |
45 FilterKind fk) : | |
46 ContiguousSpaceDCTOC(hr, cl, precision, NULL), | |
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6027
diff
changeset
|
47 _hr(hr), _fk(fk), _g1(g1) { } |
342 | 48 |
49 FilterOutOfRegionClosure::FilterOutOfRegionClosure(HeapRegion* r, | |
50 OopClosure* oc) : | |
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6027
diff
changeset
|
51 _r_bottom(r->bottom()), _r_end(r->end()), _oc(oc) { } |
342 | 52 |
53 class VerifyLiveClosure: public OopClosure { | |
811 | 54 private: |
342 | 55 G1CollectedHeap* _g1h; |
56 CardTableModRefBS* _bs; | |
57 oop _containing_obj; | |
58 bool _failures; | |
59 int _n_failures; | |
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
60 VerifyOption _vo; |
342 | 61 public: |
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
62 // _vo == UsePrevMarking -> use "prev" marking information, |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
63 // _vo == UseNextMarking -> use "next" marking information, |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
64 // _vo == UseMarkWord -> use mark word from object header. |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
65 VerifyLiveClosure(G1CollectedHeap* g1h, VerifyOption vo) : |
342 | 66 _g1h(g1h), _bs(NULL), _containing_obj(NULL), |
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
67 _failures(false), _n_failures(0), _vo(vo) |
342 | 68 { |
69 BarrierSet* bs = _g1h->barrier_set(); | |
70 if (bs->is_a(BarrierSet::CardTableModRef)) | |
71 _bs = (CardTableModRefBS*)bs; | |
72 } | |
73 | |
74 void set_containing_obj(oop obj) { | |
75 _containing_obj = obj; | |
76 } | |
77 | |
78 bool failures() { return _failures; } | |
79 int n_failures() { return _n_failures; } | |
80 | |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
81 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
|
82 virtual void do_oop( oop* p) { do_oop_work(p); } |
342 | 83 |
1388 | 84 void print_object(outputStream* out, oop obj) { |
85 #ifdef PRODUCT | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6611
diff
changeset
|
86 Klass* k = obj->klass(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6611
diff
changeset
|
87 const char* class_name = InstanceKlass::cast(k)->external_name(); |
1388 | 88 out->print_cr("class name %s", class_name); |
89 #else // PRODUCT | |
90 obj->print_on(out); | |
91 #endif // PRODUCT | |
92 } | |
93 | |
4725
3b2b58fb1425
7123165: G1: output during parallel verification can get messed up
tonyp
parents:
4073
diff
changeset
|
94 template <class T> |
3b2b58fb1425
7123165: G1: output during parallel verification can get messed up
tonyp
parents:
4073
diff
changeset
|
95 void do_oop_work(T* p) { |
342 | 96 assert(_containing_obj != NULL, "Precondition"); |
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
97 assert(!_g1h->is_obj_dead_cond(_containing_obj, _vo), |
811 | 98 "Precondition"); |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
99 T heap_oop = oopDesc::load_heap_oop(p); |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
100 if (!oopDesc::is_null(heap_oop)) { |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
101 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); |
342 | 102 bool failed = false; |
4725
3b2b58fb1425
7123165: G1: output during parallel verification can get messed up
tonyp
parents:
4073
diff
changeset
|
103 if (!_g1h->is_in_closed_subset(obj) || _g1h->is_obj_dead_cond(obj, _vo)) { |
3b2b58fb1425
7123165: G1: output during parallel verification can get messed up
tonyp
parents:
4073
diff
changeset
|
104 MutexLockerEx x(ParGCRareEvent_lock, |
3b2b58fb1425
7123165: G1: output during parallel verification can get messed up
tonyp
parents:
4073
diff
changeset
|
105 Mutex::_no_safepoint_check_flag); |
3b2b58fb1425
7123165: G1: output during parallel verification can get messed up
tonyp
parents:
4073
diff
changeset
|
106 |
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 { | |
8502
ff4fa8b0516e
-Create push patch
Christos Kotselidis <christos.kotselidis@oracle.com>
parents:
6948
diff
changeset
|
122 printf("Paok VO %d\n", _vo); |
ff4fa8b0516e
-Create push patch
Christos Kotselidis <christos.kotselidis@oracle.com>
parents:
6948
diff
changeset
|
123 |
1388 | 124 HeapRegion* from = _g1h->heap_region_containing((HeapWord*)p); |
125 HeapRegion* to = _g1h->heap_region_containing((HeapWord*)obj); | |
126 gclog_or_tty->print_cr("Field "PTR_FORMAT | |
127 " of live obj "PTR_FORMAT" in region " | |
128 "["PTR_FORMAT", "PTR_FORMAT")", | |
129 p, (void*) _containing_obj, | |
130 from->bottom(), from->end()); | |
131 print_object(gclog_or_tty, _containing_obj); | |
132 gclog_or_tty->print_cr("points to dead obj "PTR_FORMAT" in region " | |
133 "["PTR_FORMAT", "PTR_FORMAT")", | |
134 (void*) obj, to->bottom(), to->end()); | |
135 print_object(gclog_or_tty, obj); | |
342 | 136 } |
137 gclog_or_tty->print_cr("----------"); | |
4725
3b2b58fb1425
7123165: G1: output during parallel verification can get messed up
tonyp
parents:
4073
diff
changeset
|
138 gclog_or_tty->flush(); |
342 | 139 _failures = true; |
140 failed = true; | |
141 _n_failures++; | |
142 } | |
143 | |
144 if (!_g1h->full_collection()) { | |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
145 HeapRegion* from = _g1h->heap_region_containing((HeapWord*)p); |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
146 HeapRegion* to = _g1h->heap_region_containing(obj); |
342 | 147 if (from != NULL && to != NULL && |
148 from != to && | |
149 !to->isHumongous()) { | |
150 jbyte cv_obj = *_bs->byte_for_const(_containing_obj); | |
151 jbyte cv_field = *_bs->byte_for_const(p); | |
152 const jbyte dirty = CardTableModRefBS::dirty_card_val(); | |
153 | |
154 bool is_bad = !(from->is_young() | |
155 || to->rem_set()->contains_reference(p) | |
156 || !G1HRRSFlushLogBuffersOnVerify && // buffers were not flushed | |
157 (_containing_obj->is_objArray() ? | |
158 cv_field == dirty | |
159 : cv_obj == dirty || cv_field == dirty)); | |
160 if (is_bad) { | |
4725
3b2b58fb1425
7123165: G1: output during parallel verification can get messed up
tonyp
parents:
4073
diff
changeset
|
161 MutexLockerEx x(ParGCRareEvent_lock, |
3b2b58fb1425
7123165: G1: output during parallel verification can get messed up
tonyp
parents:
4073
diff
changeset
|
162 Mutex::_no_safepoint_check_flag); |
3b2b58fb1425
7123165: G1: output during parallel verification can get messed up
tonyp
parents:
4073
diff
changeset
|
163 |
342 | 164 if (!_failures) { |
165 gclog_or_tty->print_cr(""); | |
166 gclog_or_tty->print_cr("----------"); | |
167 } | |
168 gclog_or_tty->print_cr("Missing rem set entry:"); | |
3766 | 169 gclog_or_tty->print_cr("Field "PTR_FORMAT" " |
170 "of obj "PTR_FORMAT", " | |
171 "in region "HR_FORMAT, | |
172 p, (void*) _containing_obj, | |
173 HR_FORMAT_PARAMS(from)); | |
342 | 174 _containing_obj->print_on(gclog_or_tty); |
3766 | 175 gclog_or_tty->print_cr("points to obj "PTR_FORMAT" " |
176 "in region "HR_FORMAT, | |
177 (void*) obj, | |
178 HR_FORMAT_PARAMS(to)); | |
342 | 179 obj->print_on(gclog_or_tty); |
180 gclog_or_tty->print_cr("Obj head CTE = %d, field CTE = %d.", | |
181 cv_obj, cv_field); | |
182 gclog_or_tty->print_cr("----------"); | |
4725
3b2b58fb1425
7123165: G1: output during parallel verification can get messed up
tonyp
parents:
4073
diff
changeset
|
183 gclog_or_tty->flush(); |
342 | 184 _failures = true; |
185 if (!failed) _n_failures++; | |
186 } | |
187 } | |
188 } | |
189 } | |
190 } | |
191 }; | |
192 | |
193 template<class ClosureType> | |
194 HeapWord* walk_mem_region_loop(ClosureType* cl, G1CollectedHeap* g1h, | |
195 HeapRegion* hr, | |
196 HeapWord* cur, HeapWord* top) { | |
197 oop cur_oop = oop(cur); | |
198 int oop_size = cur_oop->size(); | |
199 HeapWord* next_obj = cur + oop_size; | |
200 while (next_obj < top) { | |
201 // Keep filtering the remembered set. | |
202 if (!g1h->is_obj_dead(cur_oop, hr)) { | |
203 // Bottom lies entirely below top, so we can call the | |
204 // non-memRegion version of oop_iterate below. | |
205 cur_oop->oop_iterate(cl); | |
206 } | |
207 cur = next_obj; | |
208 cur_oop = oop(cur); | |
209 oop_size = cur_oop->size(); | |
210 next_obj = cur + oop_size; | |
211 } | |
212 return cur; | |
213 } | |
214 | |
215 void HeapRegionDCTOC::walk_mem_region_with_cl(MemRegion mr, | |
216 HeapWord* bottom, | |
217 HeapWord* top, | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6611
diff
changeset
|
218 ExtendedOopClosure* cl) { |
342 | 219 G1CollectedHeap* g1h = _g1; |
220 int oop_size; | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6611
diff
changeset
|
221 ExtendedOopClosure* cl2 = NULL; |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3978
diff
changeset
|
222 |
3983
811ec3d0833b
7097053: G1: assert(da ? referent->is_oop() : referent->is_oop_or_null()) failed: referenceProcessor.cpp:1054
johnc
parents:
3979
diff
changeset
|
223 FilterIntoCSClosure intoCSFilt(this, g1h, cl); |
342 | 224 FilterOutOfRegionClosure outOfRegionFilt(_hr, cl); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3978
diff
changeset
|
225 |
342 | 226 switch (_fk) { |
3983
811ec3d0833b
7097053: G1: assert(da ? referent->is_oop() : referent->is_oop_or_null()) failed: referenceProcessor.cpp:1054
johnc
parents:
3979
diff
changeset
|
227 case NoFilterKind: cl2 = cl; break; |
342 | 228 case IntoCSFilterKind: cl2 = &intoCSFilt; break; |
229 case OutOfRegionFilterKind: cl2 = &outOfRegionFilt; break; | |
3983
811ec3d0833b
7097053: G1: assert(da ? referent->is_oop() : referent->is_oop_or_null()) failed: referenceProcessor.cpp:1054
johnc
parents:
3979
diff
changeset
|
230 default: ShouldNotReachHere(); |
342 | 231 } |
232 | |
233 // Start filtering what we add to the remembered set. If the object is | |
234 // not considered dead, either because it is marked (in the mark bitmap) | |
235 // or it was allocated after marking finished, then we add it. Otherwise | |
236 // we can safely ignore the object. | |
237 if (!g1h->is_obj_dead(oop(bottom), _hr)) { | |
238 oop_size = oop(bottom)->oop_iterate(cl2, mr); | |
239 } else { | |
240 oop_size = oop(bottom)->size(); | |
241 } | |
242 | |
243 bottom += oop_size; | |
244 | |
245 if (bottom < top) { | |
246 // We replicate the loop below for several kinds of possible filters. | |
247 switch (_fk) { | |
248 case NoFilterKind: | |
249 bottom = walk_mem_region_loop(cl, g1h, _hr, bottom, top); | |
250 break; | |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3978
diff
changeset
|
251 |
342 | 252 case IntoCSFilterKind: { |
3983
811ec3d0833b
7097053: G1: assert(da ? referent->is_oop() : referent->is_oop_or_null()) failed: referenceProcessor.cpp:1054
johnc
parents:
3979
diff
changeset
|
253 FilterIntoCSClosure filt(this, g1h, cl); |
342 | 254 bottom = walk_mem_region_loop(&filt, g1h, _hr, bottom, top); |
255 break; | |
256 } | |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3978
diff
changeset
|
257 |
342 | 258 case OutOfRegionFilterKind: { |
259 FilterOutOfRegionClosure filt(_hr, cl); | |
260 bottom = walk_mem_region_loop(&filt, g1h, _hr, bottom, top); | |
261 break; | |
262 } | |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3978
diff
changeset
|
263 |
342 | 264 default: |
265 ShouldNotReachHere(); | |
266 } | |
267 | |
268 // Last object. Need to do dead-obj filtering here too. | |
269 if (!g1h->is_obj_dead(oop(bottom), _hr)) { | |
270 oop(bottom)->oop_iterate(cl2, mr); | |
271 } | |
272 } | |
273 } | |
274 | |
942
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
parents:
866
diff
changeset
|
275 // 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
|
276 // 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
|
277 // heaps a bit more efficiently. |
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
parents:
866
diff
changeset
|
278 #define MIN_REGION_SIZE ( 1024 * 1024 ) |
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
parents:
866
diff
changeset
|
279 |
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
parents:
866
diff
changeset
|
280 // 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
|
281 // 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
|
282 // 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
|
283 // 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
|
284 // marking. |
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
parents:
866
diff
changeset
|
285 #define MAX_REGION_SIZE ( 32 * 1024 * 1024 ) |
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
parents:
866
diff
changeset
|
286 |
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
parents:
866
diff
changeset
|
287 // 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
|
288 // 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
|
289 #define TARGET_REGION_NUMBER 2048 |
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
parents:
866
diff
changeset
|
290 |
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
parents:
866
diff
changeset
|
291 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
|
292 // region_size in bytes |
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
parents:
866
diff
changeset
|
293 uintx region_size = G1HeapRegionSize; |
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
parents:
866
diff
changeset
|
294 if (FLAG_IS_DEFAULT(G1HeapRegionSize)) { |
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
parents:
866
diff
changeset
|
295 // 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
|
296 // 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
|
297 // 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
|
298 // 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
|
299 // 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
|
300 // size manually for some -Xms / -Xmx combos. |
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
parents:
866
diff
changeset
|
301 |
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
parents:
866
diff
changeset
|
302 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
|
303 (uintx) MIN_REGION_SIZE); |
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
parents:
866
diff
changeset
|
304 } |
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 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
|
307 // 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
|
308 // 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
|
309 // <= what we've calculated so far. |
1485
fb57d4cf76c2
6931180: Migration to recent versions of MS Platform SDK
prr
parents:
1394
diff
changeset
|
310 region_size = ((uintx)1 << region_size_log); |
942
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
parents:
866
diff
changeset
|
311 |
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
parents:
866
diff
changeset
|
312 // 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
|
313 if (region_size < MIN_REGION_SIZE) { |
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
parents:
866
diff
changeset
|
314 region_size = MIN_REGION_SIZE; |
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
parents:
866
diff
changeset
|
315 } else if (region_size > MAX_REGION_SIZE) { |
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
parents:
866
diff
changeset
|
316 region_size = MAX_REGION_SIZE; |
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
parents:
866
diff
changeset
|
317 } |
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
parents:
866
diff
changeset
|
318 |
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
parents:
866
diff
changeset
|
319 // And recalculate the log. |
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
parents:
866
diff
changeset
|
320 region_size_log = log2_long((jlong) 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 // Now, set up the globals. |
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
parents:
866
diff
changeset
|
323 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
|
324 LogOfHRGrainBytes = region_size_log; |
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(LogOfHRGrainWords == 0, "we should only set it once"); |
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
parents:
866
diff
changeset
|
327 LogOfHRGrainWords = LogOfHRGrainBytes - LogHeapWordSize; |
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 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
|
330 // 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
|
331 // MIN_REGION_SIZE and MAX_REGION_SIZE. |
3986
65a8ff39a6da
7095194: G1: HeapRegion::GrainBytes, GrainWords, and CardsPerRegion should be size_t
johnc
parents:
3983
diff
changeset
|
332 GrainBytes = (size_t)region_size; |
942
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
parents:
866
diff
changeset
|
333 |
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
parents:
866
diff
changeset
|
334 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
|
335 GrainWords = GrainBytes >> LogHeapWordSize; |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
336 guarantee((size_t) 1 << LogOfHRGrainWords == GrainWords, "sanity"); |
942
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
parents:
866
diff
changeset
|
337 |
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
parents:
866
diff
changeset
|
338 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
|
339 CardsPerRegion = GrainBytes >> CardTableModRefBS::card_shift; |
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
parents:
866
diff
changeset
|
340 } |
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
parents:
866
diff
changeset
|
341 |
342 | 342 void HeapRegion::reset_after_compaction() { |
343 G1OffsetTableContigSpace::reset_after_compaction(); | |
344 // After a compaction the mark bitmap is invalid, so we must | |
345 // treat all objects as being inside the unmarked area. | |
346 zero_marked_bytes(); | |
347 init_top_at_mark_start(); | |
348 } | |
349 | |
350 void HeapRegion::hr_clear(bool par, bool clear_space) { | |
2152 | 351 assert(_humongous_type == NotHumongous, |
352 "we should have already filtered out humongous regions"); | |
353 assert(_humongous_start_region == NULL, | |
354 "we should have already filtered out humongous regions"); | |
355 assert(_end == _orig_end, | |
356 "we should have already filtered out humongous regions"); | |
357 | |
342 | 358 _in_collection_set = false; |
359 | |
360 set_young_index_in_cset(-1); | |
361 uninstall_surv_rate_group(); | |
362 set_young_type(NotYoung); | |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2152
diff
changeset
|
363 reset_pre_dummy_top(); |
342 | 364 |
365 if (!par) { | |
366 // If this is parallel, this will be done later. | |
367 HeapRegionRemSet* hrrs = rem_set(); | |
368 if (hrrs != NULL) hrrs->clear(); | |
355 | 369 _claimed = InitialClaimValue; |
342 | 370 } |
371 zero_marked_bytes(); | |
372 | |
373 _offsets.resize(HeapRegion::GrainWords); | |
374 init_top_at_mark_start(); | |
356 | 375 if (clear_space) clear(SpaceDecorator::Mangle); |
342 | 376 } |
377 | |
3317
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
2433
diff
changeset
|
378 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
|
379 assert(used() == 0, "the region should have been already cleared"); |
3986
65a8ff39a6da
7095194: G1: HeapRegion::GrainBytes, GrainWords, and CardsPerRegion should be size_t
johnc
parents:
3983
diff
changeset
|
380 assert(capacity() == HeapRegion::GrainBytes, "should be back to normal"); |
3317
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
2433
diff
changeset
|
381 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
|
382 hrrs->clear(); |
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
2433
diff
changeset
|
383 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
|
384 (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
|
385 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
|
386 } |
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
2433
diff
changeset
|
387 |
342 | 388 void HeapRegion::calc_gc_efficiency() { |
6611 | 389 // GC efficiency is the ratio of how much space would be |
390 // reclaimed over how long we predict it would take to reclaim it. | |
342 | 391 G1CollectedHeap* g1h = G1CollectedHeap::heap(); |
4912
a9647476d1a4
7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents:
4839
diff
changeset
|
392 G1CollectorPolicy* g1p = g1h->g1_policy(); |
6611 | 393 |
394 // Retrieve a prediction of the elapsed time for this region for | |
395 // a mixed gc because the region will only be evacuated during a | |
396 // mixed gc. | |
397 double region_elapsed_time_ms = | |
398 g1p->predict_region_elapsed_time_ms(this, false /* for_young_gc */); | |
399 _gc_efficiency = (double) reclaimable_bytes() / region_elapsed_time_ms; | |
342 | 400 } |
401 | |
2133
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
402 void HeapRegion::set_startsHumongous(HeapWord* new_top, HeapWord* new_end) { |
2152 | 403 assert(!isHumongous(), "sanity / pre-condition"); |
1886
72a161e62cc4
6991377: G1: race between concurrent refinement and humongous object allocation
tonyp
parents:
1718
diff
changeset
|
404 assert(end() == _orig_end, |
72a161e62cc4
6991377: G1: race between concurrent refinement and humongous object allocation
tonyp
parents:
1718
diff
changeset
|
405 "Should be normal before the humongous object allocation"); |
72a161e62cc4
6991377: G1: race between concurrent refinement and humongous object allocation
tonyp
parents:
1718
diff
changeset
|
406 assert(top() == bottom(), "should be empty"); |
2133
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
407 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
|
408 |
355 | 409 _humongous_type = StartsHumongous; |
342 | 410 _humongous_start_region = this; |
1886
72a161e62cc4
6991377: G1: race between concurrent refinement and humongous object allocation
tonyp
parents:
1718
diff
changeset
|
411 |
72a161e62cc4
6991377: G1: race between concurrent refinement and humongous object allocation
tonyp
parents:
1718
diff
changeset
|
412 set_end(new_end); |
2133
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
413 _offsets.set_for_starts_humongous(new_top); |
1886
72a161e62cc4
6991377: G1: race between concurrent refinement and humongous object allocation
tonyp
parents:
1718
diff
changeset
|
414 } |
72a161e62cc4
6991377: G1: race between concurrent refinement and humongous object allocation
tonyp
parents:
1718
diff
changeset
|
415 |
2133
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
416 void HeapRegion::set_continuesHumongous(HeapRegion* first_hr) { |
2152 | 417 assert(!isHumongous(), "sanity / pre-condition"); |
1886
72a161e62cc4
6991377: G1: race between concurrent refinement and humongous object allocation
tonyp
parents:
1718
diff
changeset
|
418 assert(end() == _orig_end, |
72a161e62cc4
6991377: G1: race between concurrent refinement and humongous object allocation
tonyp
parents:
1718
diff
changeset
|
419 "Should be normal before the humongous object allocation"); |
72a161e62cc4
6991377: G1: race between concurrent refinement and humongous object allocation
tonyp
parents:
1718
diff
changeset
|
420 assert(top() == bottom(), "should be empty"); |
2133
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
421 assert(first_hr->startsHumongous(), "pre-condition"); |
1886
72a161e62cc4
6991377: G1: race between concurrent refinement and humongous object allocation
tonyp
parents:
1718
diff
changeset
|
422 |
72a161e62cc4
6991377: G1: race between concurrent refinement and humongous object allocation
tonyp
parents:
1718
diff
changeset
|
423 _humongous_type = ContinuesHumongous; |
2133
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
424 _humongous_start_region = first_hr; |
342 | 425 } |
426 | |
2152 | 427 void HeapRegion::set_notHumongous() { |
428 assert(isHumongous(), "pre-condition"); | |
429 | |
430 if (startsHumongous()) { | |
431 assert(top() <= end(), "pre-condition"); | |
432 set_end(_orig_end); | |
433 if (top() > end()) { | |
434 // at least one "continues humongous" region after it | |
435 set_top(end()); | |
436 } | |
437 } else { | |
438 // continues humongous | |
439 assert(end() == _orig_end, "sanity"); | |
440 } | |
441 | |
3986
65a8ff39a6da
7095194: G1: HeapRegion::GrainBytes, GrainWords, and CardsPerRegion should be size_t
johnc
parents:
3983
diff
changeset
|
442 assert(capacity() == HeapRegion::GrainBytes, "pre-condition"); |
2152 | 443 _humongous_type = NotHumongous; |
444 _humongous_start_region = NULL; | |
445 } | |
446 | |
342 | 447 bool HeapRegion::claimHeapRegion(jint claimValue) { |
448 jint current = _claimed; | |
449 if (current != claimValue) { | |
450 jint res = Atomic::cmpxchg(claimValue, &_claimed, current); | |
451 if (res == current) { | |
452 return true; | |
453 } | |
454 } | |
455 return false; | |
456 } | |
457 | |
458 HeapWord* HeapRegion::next_block_start_careful(HeapWord* addr) { | |
459 HeapWord* low = addr; | |
460 HeapWord* high = end(); | |
461 while (low < high) { | |
462 size_t diff = pointer_delta(high, low); | |
463 // Must add one below to bias toward the high amount. Otherwise, if | |
464 // "high" were at the desired value, and "low" were one less, we | |
465 // would not converge on "high". This is not symmetric, because | |
466 // we set "high" to a block start, which might be the right one, | |
467 // which we don't do for "low". | |
468 HeapWord* middle = low + (diff+1)/2; | |
469 if (middle == high) return high; | |
470 HeapWord* mid_bs = block_start_careful(middle); | |
471 if (mid_bs < addr) { | |
472 low = middle; | |
473 } else { | |
474 high = mid_bs; | |
475 } | |
476 } | |
477 assert(low == high && low >= addr, "Didn't work."); | |
478 return low; | |
479 } | |
480 | |
481 #ifdef _MSC_VER // the use of 'this' below gets a warning, make it go away | |
482 #pragma warning( disable:4355 ) // 'this' : used in base member initializer list | |
483 #endif // _MSC_VER | |
484 | |
485 | |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
486 HeapRegion::HeapRegion(uint hrs_index, |
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
487 G1BlockOffsetSharedArray* sharedOffsetArray, |
6754
8fbf05030e24
7016955: G1: remove the is_zeroed parameter from the HeapRegion constructor
johnc
parents:
6725
diff
changeset
|
488 MemRegion mr) : |
8fbf05030e24
7016955: G1: remove the is_zeroed parameter from the HeapRegion constructor
johnc
parents:
6725
diff
changeset
|
489 G1OffsetTableContigSpace(sharedOffsetArray, mr), |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3978
diff
changeset
|
490 _hrs_index(hrs_index), |
355 | 491 _humongous_type(NotHumongous), _humongous_start_region(NULL), |
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3772
diff
changeset
|
492 _in_collection_set(false), |
342 | 493 _next_in_special_set(NULL), _orig_end(NULL), |
355 | 494 _claimed(InitialClaimValue), _evacuation_failed(false), |
6011 | 495 _prev_marked_bytes(0), _next_marked_bytes(0), _gc_efficiency(0.0), |
342 | 496 _young_type(NotYoung), _next_young_region(NULL), |
2152 | 497 _next_dirty_cards_region(NULL), _next(NULL), _pending_removal(false), |
498 #ifdef ASSERT | |
499 _containing_set(NULL), | |
500 #endif // ASSERT | |
501 _young_index_in_cset(-1), _surv_rate_group(NULL), _age_index(-1), | |
502 _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
|
503 _predicted_bytes_to_copy(0) |
342 | 504 { |
505 _orig_end = mr.end(); | |
506 // Note that initialize() will set the start of the unmarked area of the | |
507 // region. | |
6754
8fbf05030e24
7016955: G1: remove the is_zeroed parameter from the HeapRegion constructor
johnc
parents:
6725
diff
changeset
|
508 hr_clear(false /*par*/, false /*clear_space*/); |
356 | 509 set_top(bottom()); |
510 set_saved_mark(); | |
342 | 511 |
512 _rem_set = new HeapRegionRemSet(sharedOffsetArray, this); | |
513 | |
514 assert(HeapRegionRemSet::num_par_rem_sets() > 0, "Invariant."); | |
515 } | |
516 | |
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6027
diff
changeset
|
517 CompactibleSpace* HeapRegion::next_compaction_space() const { |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6027
diff
changeset
|
518 // We're not using an iterator given that it will wrap around when |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6027
diff
changeset
|
519 // it reaches the last region and this is not what we want here. |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6027
diff
changeset
|
520 G1CollectedHeap* g1h = G1CollectedHeap::heap(); |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6027
diff
changeset
|
521 uint index = hrs_index() + 1; |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6027
diff
changeset
|
522 while (index < g1h->n_regions()) { |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6027
diff
changeset
|
523 HeapRegion* hr = g1h->region_at(index); |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6027
diff
changeset
|
524 if (!hr->isHumongous()) { |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6027
diff
changeset
|
525 return hr; |
342 | 526 } |
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6027
diff
changeset
|
527 index += 1; |
342 | 528 } |
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6027
diff
changeset
|
529 return NULL; |
342 | 530 } |
531 | |
532 void HeapRegion::save_marks() { | |
533 set_saved_mark(); | |
534 } | |
535 | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6611
diff
changeset
|
536 void HeapRegion::oops_in_mr_iterate(MemRegion mr, ExtendedOopClosure* cl) { |
342 | 537 HeapWord* p = mr.start(); |
538 HeapWord* e = mr.end(); | |
539 oop obj; | |
540 while (p < e) { | |
541 obj = oop(p); | |
542 p += obj->oop_iterate(cl); | |
543 } | |
544 assert(p == e, "bad memregion: doesn't end on obj boundary"); | |
545 } | |
546 | |
547 #define HeapRegion_OOP_SINCE_SAVE_MARKS_DEFN(OopClosureType, nv_suffix) \ | |
548 void HeapRegion::oop_since_save_marks_iterate##nv_suffix(OopClosureType* cl) { \ | |
549 ContiguousSpace::oop_since_save_marks_iterate##nv_suffix(cl); \ | |
550 } | |
551 SPECIALIZED_SINCE_SAVE_MARKS_CLOSURES(HeapRegion_OOP_SINCE_SAVE_MARKS_DEFN) | |
552 | |
553 | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6611
diff
changeset
|
554 void HeapRegion::oop_before_save_marks_iterate(ExtendedOopClosure* cl) { |
342 | 555 oops_in_mr_iterate(MemRegion(bottom(), saved_mark_word()), cl); |
556 } | |
557 | |
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4725
diff
changeset
|
558 void HeapRegion::note_self_forwarding_removal_start(bool during_initial_mark, |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4725
diff
changeset
|
559 bool during_conc_mark) { |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4725
diff
changeset
|
560 // We always recreate the prev marking info and we'll explicitly |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4725
diff
changeset
|
561 // mark all objects we find to be self-forwarded on the prev |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4725
diff
changeset
|
562 // bitmap. So all objects need to be below PTAMS. |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4725
diff
changeset
|
563 _prev_top_at_mark_start = top(); |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4725
diff
changeset
|
564 _prev_marked_bytes = 0; |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4725
diff
changeset
|
565 |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4725
diff
changeset
|
566 if (during_initial_mark) { |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4725
diff
changeset
|
567 // During initial-mark, we'll also explicitly mark all objects |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4725
diff
changeset
|
568 // we find to be self-forwarded on the next bitmap. So all |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4725
diff
changeset
|
569 // objects need to be below NTAMS. |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4725
diff
changeset
|
570 _next_top_at_mark_start = top(); |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4725
diff
changeset
|
571 _next_marked_bytes = 0; |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4725
diff
changeset
|
572 } else if (during_conc_mark) { |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4725
diff
changeset
|
573 // During concurrent mark, all objects in the CSet (including |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4725
diff
changeset
|
574 // the ones we find to be self-forwarded) are implicitly live. |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4725
diff
changeset
|
575 // So all objects need to be above NTAMS. |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4725
diff
changeset
|
576 _next_top_at_mark_start = bottom(); |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4725
diff
changeset
|
577 _next_marked_bytes = 0; |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4725
diff
changeset
|
578 } |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4725
diff
changeset
|
579 } |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4725
diff
changeset
|
580 |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4725
diff
changeset
|
581 void HeapRegion::note_self_forwarding_removal_end(bool during_initial_mark, |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4725
diff
changeset
|
582 bool during_conc_mark, |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4725
diff
changeset
|
583 size_t marked_bytes) { |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4725
diff
changeset
|
584 assert(0 <= marked_bytes && marked_bytes <= used(), |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4725
diff
changeset
|
585 err_msg("marked: "SIZE_FORMAT" used: "SIZE_FORMAT, |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4725
diff
changeset
|
586 marked_bytes, used())); |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4725
diff
changeset
|
587 _prev_marked_bytes = marked_bytes; |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4725
diff
changeset
|
588 } |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4725
diff
changeset
|
589 |
342 | 590 HeapWord* |
591 HeapRegion::object_iterate_mem_careful(MemRegion mr, | |
592 ObjectClosure* cl) { | |
593 G1CollectedHeap* g1h = G1CollectedHeap::heap(); | |
594 // We used to use "block_start_careful" here. But we're actually happy | |
595 // to update the BOT while we do this... | |
596 HeapWord* cur = block_start(mr.start()); | |
597 mr = mr.intersection(used_region()); | |
598 if (mr.is_empty()) return NULL; | |
599 // Otherwise, find the obj that extends onto mr.start(). | |
600 | |
601 assert(cur <= mr.start() | |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
602 && (oop(cur)->klass_or_null() == NULL || |
342 | 603 cur + oop(cur)->size() > mr.start()), |
604 "postcondition of block_start"); | |
605 oop obj; | |
606 while (cur < mr.end()) { | |
607 obj = oop(cur); | |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
608 if (obj->klass_or_null() == NULL) { |
342 | 609 // Ran into an unparseable point. |
610 return cur; | |
611 } else if (!g1h->is_obj_dead(obj)) { | |
612 cl->do_object(obj); | |
613 } | |
614 if (cl->abort()) return cur; | |
615 // The check above must occur before the operation below, since an | |
616 // abort might invalidate the "size" operation. | |
617 cur += obj->size(); | |
618 } | |
619 return NULL; | |
620 } | |
621 | |
622 HeapWord* | |
623 HeapRegion:: | |
624 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
|
625 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
|
626 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
|
627 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
|
628 // 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
|
629 // 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
|
630 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
|
631 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
|
632 } else { |
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
2433
diff
changeset
|
633 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
|
634 } |
342 | 635 G1CollectedHeap* g1h = G1CollectedHeap::heap(); |
636 | |
637 // If we're within a stop-world GC, then we might look at a card in a | |
638 // GC alloc region that extends onto a GC LAB, which may not be | |
639 // parseable. Stop such at the "saved_mark" of the region. | |
4839 | 640 if (g1h->is_gc_active()) { |
342 | 641 mr = mr.intersection(used_region_at_save_marks()); |
642 } else { | |
643 mr = mr.intersection(used_region()); | |
644 } | |
645 if (mr.is_empty()) return NULL; | |
646 // Otherwise, find the obj that extends onto mr.start(). | |
647 | |
1666
5cbac8938c4c
6956639: G1: assert(cached_ptr != card_ptr) failed: shouldn't be, concurrentG1Refine.cpp:307
johnc
parents:
1552
diff
changeset
|
648 // 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
|
649 // 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
|
650 // 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
|
651 // 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
|
652 // 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
|
653 // 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
|
654 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
|
655 return NULL; |
5cbac8938c4c
6956639: G1: assert(cached_ptr != card_ptr) failed: shouldn't be, concurrentG1Refine.cpp:307
johnc
parents:
1552
diff
changeset
|
656 } |
5cbac8938c4c
6956639: G1: assert(cached_ptr != card_ptr) failed: shouldn't be, concurrentG1Refine.cpp:307
johnc
parents:
1552
diff
changeset
|
657 |
1705 | 658 assert(!is_young(), "check value of filter_young"); |
659 | |
3317
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
2433
diff
changeset
|
660 // 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
|
661 // 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
|
662 // 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
|
663 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
|
664 *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
|
665 // 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
|
666 OrderAccess::storeload(); |
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
2433
diff
changeset
|
667 } |
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
2433
diff
changeset
|
668 |
4839 | 669 // Cache the boundaries of the memory region in some const locals |
670 HeapWord* const start = mr.start(); | |
671 HeapWord* const end = mr.end(); | |
672 | |
342 | 673 // We used to use "block_start_careful" here. But we're actually happy |
674 // to update the BOT while we do this... | |
4839 | 675 HeapWord* cur = block_start(start); |
676 assert(cur <= start, "Postcondition"); | |
677 | |
678 oop obj; | |
342 | 679 |
4839 | 680 HeapWord* next = cur; |
681 while (next <= start) { | |
682 cur = next; | |
683 obj = oop(cur); | |
684 if (obj->klass_or_null() == NULL) { | |
342 | 685 // Ran into an unparseable point. |
686 return cur; | |
687 } | |
688 // Otherwise... | |
4839 | 689 next = (cur + obj->size()); |
342 | 690 } |
4839 | 691 |
692 // If we finish the above loop...We have a parseable object that | |
693 // begins on or before the start of the memory region, and ends | |
694 // inside or spans the entire region. | |
695 | |
696 assert(obj == oop(cur), "sanity"); | |
697 assert(cur <= start && | |
698 obj->klass_or_null() != NULL && | |
699 (cur + obj->size()) > start, | |
342 | 700 "Loop postcondition"); |
4839 | 701 |
342 | 702 if (!g1h->is_obj_dead(obj)) { |
703 obj->oop_iterate(cl, mr); | |
704 } | |
705 | |
4839 | 706 while (cur < end) { |
342 | 707 obj = oop(cur); |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
708 if (obj->klass_or_null() == NULL) { |
342 | 709 // Ran into an unparseable point. |
710 return cur; | |
711 }; | |
4839 | 712 |
342 | 713 // Otherwise: |
714 next = (cur + obj->size()); | |
4839 | 715 |
342 | 716 if (!g1h->is_obj_dead(obj)) { |
4839 | 717 if (next < end || !obj->is_objArray()) { |
718 // This object either does not span the MemRegion | |
719 // boundary, or if it does it's not an array. | |
720 // Apply closure to whole object. | |
342 | 721 obj->oop_iterate(cl); |
722 } else { | |
4839 | 723 // This obj is an array that spans the boundary. |
724 // Stop at the boundary. | |
725 obj->oop_iterate(cl, mr); | |
342 | 726 } |
727 } | |
728 cur = next; | |
729 } | |
730 return NULL; | |
731 } | |
732 | |
733 void HeapRegion::print() const { print_on(gclog_or_tty); } | |
734 void HeapRegion::print_on(outputStream* st) const { | |
735 if (isHumongous()) { | |
736 if (startsHumongous()) | |
737 st->print(" HS"); | |
738 else | |
739 st->print(" HC"); | |
740 } else { | |
741 st->print(" "); | |
742 } | |
743 if (in_collection_set()) | |
744 st->print(" CS"); | |
745 else | |
746 st->print(" "); | |
747 if (is_young()) | |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1388
diff
changeset
|
748 st->print(is_survivor() ? " SU" : " Y "); |
342 | 749 else |
750 st->print(" "); | |
751 if (is_empty()) | |
752 st->print(" F"); | |
753 else | |
754 st->print(" "); | |
4073
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4023
diff
changeset
|
755 st->print(" TS %5d", _gc_time_stamp); |
1388 | 756 st->print(" PTAMS "PTR_FORMAT" NTAMS "PTR_FORMAT, |
757 prev_top_at_mark_start(), next_top_at_mark_start()); | |
342 | 758 G1OffsetTableContigSpace::print_on(st); |
759 } | |
760 | |
6008 | 761 void HeapRegion::verify() const { |
1020
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
942
diff
changeset
|
762 bool dummy = false; |
6008 | 763 verify(VerifyOption_G1UsePrevMarking, /* failures */ &dummy); |
811 | 764 } |
765 | |
342 | 766 // This really ought to be commoned up into OffsetTableContigSpace somehow. |
767 // We would need a mechanism to make that code skip dead objects. | |
768 | |
6008 | 769 void HeapRegion::verify(VerifyOption vo, |
1020
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
942
diff
changeset
|
770 bool* failures) const { |
342 | 771 G1CollectedHeap* g1 = G1CollectedHeap::heap(); |
1020
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
942
diff
changeset
|
772 *failures = false; |
342 | 773 HeapWord* p = bottom(); |
774 HeapWord* prev_p = NULL; | |
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
775 VerifyLiveClosure vl_cl(g1, vo); |
1718
bb847e31b836
6974928: G1: sometimes humongous objects are allocated in young regions
tonyp
parents:
1705
diff
changeset
|
776 bool is_humongous = isHumongous(); |
2133
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
777 bool do_bot_verify = !is_young(); |
1718
bb847e31b836
6974928: G1: sometimes humongous objects are allocated in young regions
tonyp
parents:
1705
diff
changeset
|
778 size_t object_num = 0; |
342 | 779 while (p < top()) { |
2133
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
780 oop obj = oop(p); |
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
781 size_t obj_size = obj->size(); |
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
782 object_num += 1; |
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
783 |
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
784 if (is_humongous != g1->isHumongous(obj_size)) { |
1718
bb847e31b836
6974928: G1: sometimes humongous objects are allocated in young regions
tonyp
parents:
1705
diff
changeset
|
785 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
|
786 SIZE_FORMAT" words) in a %shumongous region", |
2133
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
787 p, g1->isHumongous(obj_size) ? "" : "non-", |
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
788 obj_size, is_humongous ? "" : "non-"); |
1718
bb847e31b836
6974928: G1: sometimes humongous objects are allocated in young regions
tonyp
parents:
1705
diff
changeset
|
789 *failures = true; |
2133
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
790 return; |
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
791 } |
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
792 |
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
793 // 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
|
794 // appropriate messasge. |
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
795 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
|
796 *failures = true; |
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
797 return; |
1718
bb847e31b836
6974928: G1: sometimes humongous objects are allocated in young regions
tonyp
parents:
1705
diff
changeset
|
798 } |
2133
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
799 |
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
800 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
|
801 if (obj->is_oop()) { |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6611
diff
changeset
|
802 Klass* klass = obj->klass(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6611
diff
changeset
|
803 if (!klass->is_metadata()) { |
2133
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
804 gclog_or_tty->print_cr("klass "PTR_FORMAT" of object "PTR_FORMAT" " |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6611
diff
changeset
|
805 "not metadata", klass, obj); |
2133
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
806 *failures = true; |
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
807 return; |
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
808 } else if (!klass->is_klass()) { |
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
809 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
|
810 "not a klass", klass, obj); |
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
811 *failures = true; |
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
812 return; |
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
813 } else { |
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
814 vl_cl.set_containing_obj(obj); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6611
diff
changeset
|
815 obj->oop_iterate_no_header(&vl_cl); |
2133
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
816 if (vl_cl.failures()) { |
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
817 *failures = true; |
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
818 } |
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
819 if (G1MaxVerifyFailures >= 0 && |
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
820 vl_cl.n_failures() >= G1MaxVerifyFailures) { |
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
821 return; |
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
822 } |
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
823 } |
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
824 } else { |
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
825 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
|
826 *failures = true; |
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
942
diff
changeset
|
827 return; |
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
942
diff
changeset
|
828 } |
342 | 829 } |
830 prev_p = p; | |
2133
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
831 p += obj_size; |
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
832 } |
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 if (p != top()) { |
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
835 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
|
836 "does not match top "PTR_FORMAT, p, top()); |
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
837 *failures = true; |
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
838 return; |
342 | 839 } |
2133
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
840 |
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
841 HeapWord* the_end = end(); |
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
842 assert(p == top(), "it should still hold"); |
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
843 // 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
|
844 // 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
|
845 // 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
|
846 if (p < the_end) { |
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
847 // Look up top |
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
848 HeapWord* addr_1 = p; |
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
849 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
|
850 if (b_start_1 != p) { |
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
851 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
|
852 " yielded "PTR_FORMAT", expecting "PTR_FORMAT, |
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
853 addr_1, b_start_1, p); |
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
854 *failures = true; |
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
855 return; |
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
856 } |
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
857 |
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
858 // Look up top + 1 |
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
859 HeapWord* addr_2 = p + 1; |
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
860 if (addr_2 < the_end) { |
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
861 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
|
862 if (b_start_2 != p) { |
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
863 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
|
864 " yielded "PTR_FORMAT", expecting "PTR_FORMAT, |
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
865 addr_2, b_start_2, p); |
1020
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
942
diff
changeset
|
866 *failures = true; |
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
942
diff
changeset
|
867 return; |
2133
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
868 } |
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
869 } |
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
870 |
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
871 // Look up an address between top and end |
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
872 size_t diff = pointer_delta(the_end, p) / 2; |
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
873 HeapWord* addr_3 = p + diff; |
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
874 if (addr_3 < the_end) { |
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
875 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
|
876 if (b_start_3 != p) { |
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
877 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
|
878 " yielded "PTR_FORMAT", expecting "PTR_FORMAT, |
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
879 addr_3, b_start_3, p); |
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
880 *failures = true; |
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
881 return; |
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
882 } |
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
883 } |
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
884 |
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
885 // Loook up end - 1 |
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
886 HeapWord* addr_4 = the_end - 1; |
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
887 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
|
888 if (b_start_4 != p) { |
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
889 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
|
890 " yielded "PTR_FORMAT", expecting "PTR_FORMAT, |
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
891 addr_4, b_start_4, p); |
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
892 *failures = true; |
2250ee17e258
7007068: G1: refine the BOT during evac failure handling
tonyp
parents:
1972
diff
changeset
|
893 return; |
1020
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
942
diff
changeset
|
894 } |
342 | 895 } |
1020
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
942
diff
changeset
|
896 |
1718
bb847e31b836
6974928: G1: sometimes humongous objects are allocated in young regions
tonyp
parents:
1705
diff
changeset
|
897 if (is_humongous && object_num > 1) { |
bb847e31b836
6974928: G1: sometimes humongous objects are allocated in young regions
tonyp
parents:
1705
diff
changeset
|
898 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
|
899 "but has "SIZE_FORMAT", objects", |
bb847e31b836
6974928: G1: sometimes humongous objects are allocated in young regions
tonyp
parents:
1705
diff
changeset
|
900 bottom(), end(), object_num); |
bb847e31b836
6974928: G1: sometimes humongous objects are allocated in young regions
tonyp
parents:
1705
diff
changeset
|
901 *failures = true; |
1020
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
942
diff
changeset
|
902 return; |
342 | 903 } |
904 } | |
905 | |
906 // G1OffsetTableContigSpace code; copied from space.cpp. Hope this can go | |
907 // away eventually. | |
908 | |
356 | 909 void G1OffsetTableContigSpace::clear(bool mangle_space) { |
910 ContiguousSpace::clear(mangle_space); | |
342 | 911 _offsets.zero_bottom_entry(); |
912 _offsets.initialize_threshold(); | |
913 } | |
914 | |
915 void G1OffsetTableContigSpace::set_bottom(HeapWord* new_bottom) { | |
916 Space::set_bottom(new_bottom); | |
917 _offsets.set_bottom(new_bottom); | |
918 } | |
919 | |
920 void G1OffsetTableContigSpace::set_end(HeapWord* new_end) { | |
921 Space::set_end(new_end); | |
922 _offsets.resize(new_end - bottom()); | |
923 } | |
924 | |
925 void G1OffsetTableContigSpace::print() const { | |
926 print_short(); | |
927 gclog_or_tty->print_cr(" [" INTPTR_FORMAT ", " INTPTR_FORMAT ", " | |
928 INTPTR_FORMAT ", " INTPTR_FORMAT ")", | |
929 bottom(), top(), _offsets.threshold(), end()); | |
930 } | |
931 | |
932 HeapWord* G1OffsetTableContigSpace::initialize_threshold() { | |
933 return _offsets.initialize_threshold(); | |
934 } | |
935 | |
936 HeapWord* G1OffsetTableContigSpace::cross_threshold(HeapWord* start, | |
937 HeapWord* end) { | |
938 _offsets.alloc_block(start, end); | |
939 return _offsets.threshold(); | |
940 } | |
941 | |
942 HeapWord* G1OffsetTableContigSpace::saved_mark_word() const { | |
943 G1CollectedHeap* g1h = G1CollectedHeap::heap(); | |
944 assert( _gc_time_stamp <= g1h->get_gc_time_stamp(), "invariant" ); | |
945 if (_gc_time_stamp < g1h->get_gc_time_stamp()) | |
946 return top(); | |
947 else | |
948 return ContiguousSpace::saved_mark_word(); | |
949 } | |
950 | |
951 void G1OffsetTableContigSpace::set_saved_mark() { | |
952 G1CollectedHeap* g1h = G1CollectedHeap::heap(); | |
953 unsigned curr_gc_time_stamp = g1h->get_gc_time_stamp(); | |
954 | |
955 if (_gc_time_stamp < curr_gc_time_stamp) { | |
956 // The order of these is important, as another thread might be | |
957 // about to start scanning this region. If it does so after | |
958 // set_saved_mark and before _gc_time_stamp = ..., then the latter | |
959 // will be false, and it will pick up top() as the high water mark | |
960 // of region. If it does so after _gc_time_stamp = ..., then it | |
961 // will pick up the right saved_mark_word() as the high water mark | |
962 // of the region. Either way, the behaviour will be correct. | |
963 ContiguousSpace::set_saved_mark(); | |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
964 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
|
965 _gc_time_stamp = curr_gc_time_stamp; |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2152
diff
changeset
|
966 // 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
|
967 // 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
|
968 // 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
|
969 // 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
|
970 // flushed. |
342 | 971 } |
972 } | |
973 | |
974 G1OffsetTableContigSpace:: | |
975 G1OffsetTableContigSpace(G1BlockOffsetSharedArray* sharedOffsetArray, | |
6754
8fbf05030e24
7016955: G1: remove the is_zeroed parameter from the HeapRegion constructor
johnc
parents:
6725
diff
changeset
|
976 MemRegion mr) : |
342 | 977 _offsets(sharedOffsetArray, mr), |
978 _par_alloc_lock(Mutex::leaf, "OffsetTableContigSpace par alloc lock", true), | |
979 _gc_time_stamp(0) | |
980 { | |
981 _offsets.set_space(this); | |
6754
8fbf05030e24
7016955: G1: remove the is_zeroed parameter from the HeapRegion constructor
johnc
parents:
6725
diff
changeset
|
982 // false ==> we'll do the clearing if there's clearing to be done. |
8fbf05030e24
7016955: G1: remove the is_zeroed parameter from the HeapRegion constructor
johnc
parents:
6725
diff
changeset
|
983 ContiguousSpace::initialize(mr, false, SpaceDecorator::Mangle); |
8fbf05030e24
7016955: G1: remove the is_zeroed parameter from the HeapRegion constructor
johnc
parents:
6725
diff
changeset
|
984 _offsets.zero_bottom_entry(); |
8fbf05030e24
7016955: G1: remove the is_zeroed parameter from the HeapRegion constructor
johnc
parents:
6725
diff
changeset
|
985 _offsets.initialize_threshold(); |
342 | 986 } |