Mercurial > hg > graal-jvmci-8
annotate src/share/vm/gc_implementation/shared/markSweep.cpp @ 989:148e5441d916
6863023: need non-perm oops in code cache for JSR 292
Summary: Make a special root-list for those few nmethods which might contain non-perm oops.
Reviewed-by: twisti, kvn, never, jmasa, ysr
author | jrose |
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date | Tue, 15 Sep 2009 21:53:47 -0700 |
parents | d1605aabd0a1 |
children | 54b3b351d6f9 |
rev | line source |
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0 | 1 /* |
196 | 2 * Copyright 1997-2008 Sun Microsystems, Inc. All Rights Reserved. |
0 | 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 * | |
19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
20 * CA 95054 USA or visit www.sun.com if you need additional information or | |
21 * have any questions. | |
22 * | |
23 */ | |
24 | |
25 #include "incls/_precompiled.incl" | |
26 #include "incls/_markSweep.cpp.incl" | |
27 | |
28 GrowableArray<oop>* MarkSweep::_marking_stack = NULL; | |
29 GrowableArray<Klass*>* MarkSweep::_revisit_klass_stack = NULL; | |
30 | |
31 GrowableArray<oop>* MarkSweep::_preserved_oop_stack = NULL; | |
32 GrowableArray<markOop>* MarkSweep::_preserved_mark_stack= NULL; | |
33 size_t MarkSweep::_preserved_count = 0; | |
34 size_t MarkSweep::_preserved_count_max = 0; | |
35 PreservedMark* MarkSweep::_preserved_marks = NULL; | |
36 ReferenceProcessor* MarkSweep::_ref_processor = NULL; | |
37 | |
38 #ifdef VALIDATE_MARK_SWEEP | |
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39 GrowableArray<void*>* MarkSweep::_root_refs_stack = NULL; |
0 | 40 GrowableArray<oop> * MarkSweep::_live_oops = NULL; |
41 GrowableArray<oop> * MarkSweep::_live_oops_moved_to = NULL; | |
42 GrowableArray<size_t>* MarkSweep::_live_oops_size = NULL; | |
43 size_t MarkSweep::_live_oops_index = 0; | |
44 size_t MarkSweep::_live_oops_index_at_perm = 0; | |
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45 GrowableArray<void*>* MarkSweep::_other_refs_stack = NULL; |
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46 GrowableArray<void*>* MarkSweep::_adjusted_pointers = NULL; |
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47 bool MarkSweep::_pointer_tracking = false; |
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48 bool MarkSweep::_root_tracking = true; |
0 | 49 |
50 GrowableArray<HeapWord*>* MarkSweep::_cur_gc_live_oops = NULL; | |
51 GrowableArray<HeapWord*>* MarkSweep::_cur_gc_live_oops_moved_to = NULL; | |
52 GrowableArray<size_t> * MarkSweep::_cur_gc_live_oops_size = NULL; | |
53 GrowableArray<HeapWord*>* MarkSweep::_last_gc_live_oops = NULL; | |
54 GrowableArray<HeapWord*>* MarkSweep::_last_gc_live_oops_moved_to = NULL; | |
55 GrowableArray<size_t> * MarkSweep::_last_gc_live_oops_size = NULL; | |
56 #endif | |
57 | |
58 void MarkSweep::revisit_weak_klass_link(Klass* k) { | |
59 _revisit_klass_stack->push(k); | |
60 } | |
61 | |
62 void MarkSweep::follow_weak_klass_links() { | |
63 // All klasses on the revisit stack are marked at this point. | |
64 // Update and follow all subklass, sibling and implementor links. | |
65 for (int i = 0; i < _revisit_klass_stack->length(); i++) { | |
66 _revisit_klass_stack->at(i)->follow_weak_klass_links(&is_alive,&keep_alive); | |
67 } | |
68 follow_stack(); | |
69 } | |
70 | |
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71 MarkSweep::FollowRootClosure MarkSweep::follow_root_closure; |
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72 CodeBlobToOopClosure MarkSweep::follow_code_root_closure(&MarkSweep::follow_root_closure, /*do_marking=*/ true); |
0 | 73 |
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74 void MarkSweep::FollowRootClosure::do_oop(oop* p) { follow_root(p); } |
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75 void MarkSweep::FollowRootClosure::do_oop(narrowOop* p) { follow_root(p); } |
0 | 76 |
77 MarkSweep::MarkAndPushClosure MarkSweep::mark_and_push_closure; | |
78 | |
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79 void MarkSweep::MarkAndPushClosure::do_oop(oop* p) { mark_and_push(p); } |
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80 void MarkSweep::MarkAndPushClosure::do_oop(narrowOop* p) { mark_and_push(p); } |
0 | 81 |
82 void MarkSweep::follow_stack() { | |
83 while (!_marking_stack->is_empty()) { | |
84 oop obj = _marking_stack->pop(); | |
85 assert (obj->is_gc_marked(), "p must be marked"); | |
86 obj->follow_contents(); | |
87 } | |
88 } | |
89 | |
90 MarkSweep::FollowStackClosure MarkSweep::follow_stack_closure; | |
91 | |
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92 void MarkSweep::FollowStackClosure::do_void() { follow_stack(); } |
0 | 93 |
94 // We preserve the mark which should be replaced at the end and the location that it | |
95 // will go. Note that the object that this markOop belongs to isn't currently at that | |
96 // address but it will be after phase4 | |
97 void MarkSweep::preserve_mark(oop obj, markOop mark) { | |
98 // we try to store preserved marks in the to space of the new generation since this | |
99 // is storage which should be available. Most of the time this should be sufficient | |
100 // space for the marks we need to preserve but if it isn't we fall back in using | |
101 // GrowableArrays to keep track of the overflow. | |
102 if (_preserved_count < _preserved_count_max) { | |
103 _preserved_marks[_preserved_count++].init(obj, mark); | |
104 } else { | |
105 if (_preserved_mark_stack == NULL) { | |
106 _preserved_mark_stack = new (ResourceObj::C_HEAP) GrowableArray<markOop>(40, true); | |
107 _preserved_oop_stack = new (ResourceObj::C_HEAP) GrowableArray<oop>(40, true); | |
108 } | |
109 _preserved_mark_stack->push(mark); | |
110 _preserved_oop_stack->push(obj); | |
111 } | |
112 } | |
113 | |
114 MarkSweep::AdjustPointerClosure MarkSweep::adjust_root_pointer_closure(true); | |
115 MarkSweep::AdjustPointerClosure MarkSweep::adjust_pointer_closure(false); | |
116 | |
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117 void MarkSweep::AdjustPointerClosure::do_oop(oop* p) { adjust_pointer(p, _is_root); } |
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118 void MarkSweep::AdjustPointerClosure::do_oop(narrowOop* p) { adjust_pointer(p, _is_root); } |
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119 |
0 | 120 void MarkSweep::adjust_marks() { |
121 assert(_preserved_oop_stack == NULL || | |
122 _preserved_oop_stack->length() == _preserved_mark_stack->length(), | |
123 "inconsistent preserved oop stacks"); | |
124 | |
125 // adjust the oops we saved earlier | |
126 for (size_t i = 0; i < _preserved_count; i++) { | |
127 _preserved_marks[i].adjust_pointer(); | |
128 } | |
129 | |
130 // deal with the overflow stack | |
131 if (_preserved_oop_stack) { | |
132 for (int i = 0; i < _preserved_oop_stack->length(); i++) { | |
133 oop* p = _preserved_oop_stack->adr_at(i); | |
134 adjust_pointer(p); | |
135 } | |
136 } | |
137 } | |
138 | |
139 void MarkSweep::restore_marks() { | |
140 assert(_preserved_oop_stack == NULL || | |
141 _preserved_oop_stack->length() == _preserved_mark_stack->length(), | |
142 "inconsistent preserved oop stacks"); | |
143 if (PrintGC && Verbose) { | |
144 gclog_or_tty->print_cr("Restoring %d marks", _preserved_count + | |
145 (_preserved_oop_stack ? _preserved_oop_stack->length() : 0)); | |
146 } | |
147 | |
148 // restore the marks we saved earlier | |
149 for (size_t i = 0; i < _preserved_count; i++) { | |
150 _preserved_marks[i].restore(); | |
151 } | |
152 | |
153 // deal with the overflow | |
154 if (_preserved_oop_stack) { | |
155 for (int i = 0; i < _preserved_oop_stack->length(); i++) { | |
156 oop obj = _preserved_oop_stack->at(i); | |
157 markOop mark = _preserved_mark_stack->at(i); | |
158 obj->set_mark(mark); | |
159 } | |
160 } | |
161 } | |
162 | |
163 #ifdef VALIDATE_MARK_SWEEP | |
164 | |
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165 void MarkSweep::track_adjusted_pointer(void* p, bool isroot) { |
0 | 166 if (!ValidateMarkSweep) |
167 return; | |
168 | |
169 if (!isroot) { | |
170 if (_pointer_tracking) { | |
171 guarantee(_adjusted_pointers->contains(p), "should have seen this pointer"); | |
172 _adjusted_pointers->remove(p); | |
173 } | |
174 } else { | |
175 ptrdiff_t index = _root_refs_stack->find(p); | |
176 if (index != -1) { | |
177 int l = _root_refs_stack->length(); | |
178 if (l > 0 && l - 1 != index) { | |
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179 void* last = _root_refs_stack->pop(); |
0 | 180 assert(last != p, "should be different"); |
181 _root_refs_stack->at_put(index, last); | |
182 } else { | |
183 _root_refs_stack->remove(p); | |
184 } | |
185 } | |
186 } | |
187 } | |
188 | |
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189 void MarkSweep::check_adjust_pointer(void* p) { |
0 | 190 _adjusted_pointers->push(p); |
191 } | |
192 | |
193 class AdjusterTracker: public OopClosure { | |
194 public: | |
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195 AdjusterTracker() {} |
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196 void do_oop(oop* o) { MarkSweep::check_adjust_pointer(o); } |
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197 void do_oop(narrowOop* o) { MarkSweep::check_adjust_pointer(o); } |
0 | 198 }; |
199 | |
200 void MarkSweep::track_interior_pointers(oop obj) { | |
201 if (ValidateMarkSweep) { | |
202 _adjusted_pointers->clear(); | |
203 _pointer_tracking = true; | |
204 | |
205 AdjusterTracker checker; | |
206 obj->oop_iterate(&checker); | |
207 } | |
208 } | |
209 | |
210 void MarkSweep::check_interior_pointers() { | |
211 if (ValidateMarkSweep) { | |
212 _pointer_tracking = false; | |
213 guarantee(_adjusted_pointers->length() == 0, "should have processed the same pointers"); | |
214 } | |
215 } | |
216 | |
217 void MarkSweep::reset_live_oop_tracking(bool at_perm) { | |
218 if (ValidateMarkSweep) { | |
219 guarantee((size_t)_live_oops->length() == _live_oops_index, "should be at end of live oops"); | |
220 _live_oops_index = at_perm ? _live_oops_index_at_perm : 0; | |
221 } | |
222 } | |
223 | |
224 void MarkSweep::register_live_oop(oop p, size_t size) { | |
225 if (ValidateMarkSweep) { | |
226 _live_oops->push(p); | |
227 _live_oops_size->push(size); | |
228 _live_oops_index++; | |
229 } | |
230 } | |
231 | |
232 void MarkSweep::validate_live_oop(oop p, size_t size) { | |
233 if (ValidateMarkSweep) { | |
234 oop obj = _live_oops->at((int)_live_oops_index); | |
235 guarantee(obj == p, "should be the same object"); | |
236 guarantee(_live_oops_size->at((int)_live_oops_index) == size, "should be the same size"); | |
237 _live_oops_index++; | |
238 } | |
239 } | |
240 | |
241 void MarkSweep::live_oop_moved_to(HeapWord* q, size_t size, | |
242 HeapWord* compaction_top) { | |
243 assert(oop(q)->forwardee() == NULL || oop(q)->forwardee() == oop(compaction_top), | |
244 "should be moved to forwarded location"); | |
245 if (ValidateMarkSweep) { | |
246 MarkSweep::validate_live_oop(oop(q), size); | |
247 _live_oops_moved_to->push(oop(compaction_top)); | |
248 } | |
249 if (RecordMarkSweepCompaction) { | |
250 _cur_gc_live_oops->push(q); | |
251 _cur_gc_live_oops_moved_to->push(compaction_top); | |
252 _cur_gc_live_oops_size->push(size); | |
253 } | |
254 } | |
255 | |
256 void MarkSweep::compaction_complete() { | |
257 if (RecordMarkSweepCompaction) { | |
258 GrowableArray<HeapWord*>* _tmp_live_oops = _cur_gc_live_oops; | |
259 GrowableArray<HeapWord*>* _tmp_live_oops_moved_to = _cur_gc_live_oops_moved_to; | |
260 GrowableArray<size_t> * _tmp_live_oops_size = _cur_gc_live_oops_size; | |
261 | |
262 _cur_gc_live_oops = _last_gc_live_oops; | |
263 _cur_gc_live_oops_moved_to = _last_gc_live_oops_moved_to; | |
264 _cur_gc_live_oops_size = _last_gc_live_oops_size; | |
265 _last_gc_live_oops = _tmp_live_oops; | |
266 _last_gc_live_oops_moved_to = _tmp_live_oops_moved_to; | |
267 _last_gc_live_oops_size = _tmp_live_oops_size; | |
268 } | |
269 } | |
270 | |
271 void MarkSweep::print_new_location_of_heap_address(HeapWord* q) { | |
272 if (!RecordMarkSweepCompaction) { | |
273 tty->print_cr("Requires RecordMarkSweepCompaction to be enabled"); | |
274 return; | |
275 } | |
276 | |
277 if (_last_gc_live_oops == NULL) { | |
278 tty->print_cr("No compaction information gathered yet"); | |
279 return; | |
280 } | |
281 | |
282 for (int i = 0; i < _last_gc_live_oops->length(); i++) { | |
283 HeapWord* old_oop = _last_gc_live_oops->at(i); | |
284 size_t sz = _last_gc_live_oops_size->at(i); | |
285 if (old_oop <= q && q < (old_oop + sz)) { | |
286 HeapWord* new_oop = _last_gc_live_oops_moved_to->at(i); | |
287 size_t offset = (q - old_oop); | |
288 tty->print_cr("Address " PTR_FORMAT, q); | |
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289 tty->print_cr(" Was in oop " PTR_FORMAT ", size " SIZE_FORMAT ", at offset " SIZE_FORMAT, old_oop, sz, offset); |
0 | 290 tty->print_cr(" Now in oop " PTR_FORMAT ", actual address " PTR_FORMAT, new_oop, new_oop + offset); |
291 return; | |
292 } | |
293 } | |
294 | |
295 tty->print_cr("Address " PTR_FORMAT " not found in live oop information from last GC", q); | |
296 } | |
297 #endif //VALIDATE_MARK_SWEEP | |
298 | |
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299 MarkSweep::IsAliveClosure MarkSweep::is_alive; |
0 | 300 |
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301 void MarkSweep::IsAliveClosure::do_object(oop p) { ShouldNotReachHere(); } |
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302 bool MarkSweep::IsAliveClosure::do_object_b(oop p) { return p->is_gc_marked(); } |
0 | 303 |
304 MarkSweep::KeepAliveClosure MarkSweep::keep_alive; | |
305 | |
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306 void MarkSweep::KeepAliveClosure::do_oop(oop* p) { MarkSweep::KeepAliveClosure::do_oop_work(p); } |
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307 void MarkSweep::KeepAliveClosure::do_oop(narrowOop* p) { MarkSweep::KeepAliveClosure::do_oop_work(p); } |
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308 |
0 | 309 void marksweep_init() { /* empty */ } |
310 | |
311 #ifndef PRODUCT | |
312 | |
313 void MarkSweep::trace(const char* msg) { | |
314 if (TraceMarkSweep) | |
315 gclog_or_tty->print("%s", msg); | |
316 } | |
317 | |
318 #endif |