Mercurial > hg > graal-jvmci-8
annotate src/share/vm/gc_implementation/g1/dirtyCardQueue.cpp @ 1779:6eddcbe17c83
6981746: G1: SEGV with -XX:+TraceGen0Time
Summary: Pass correct value for length to NumberSeq constructor. Guard dereferences of "body_summary" pointer with a NULL check.
Reviewed-by: tonyp, ysr
author | johnc |
---|---|
date | Mon, 13 Sep 2010 10:00:24 -0700 |
parents | 2d160770d2e5 |
children | f95d63e2154a |
rev | line source |
---|---|
342 | 1 /* |
1705 | 2 * Copyright (c) 2001, 2010, 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:
1111
diff
changeset
|
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
1111
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:
1111
diff
changeset
|
21 * questions. |
342 | 22 * |
23 */ | |
24 | |
25 # include "incls/_precompiled.incl" | |
26 # include "incls/_dirtyCardQueue.cpp.incl" | |
27 | |
28 bool DirtyCardQueue::apply_closure(CardTableEntryClosure* cl, | |
29 bool consume, | |
30 size_t worker_i) { | |
31 bool res = true; | |
32 if (_buf != NULL) { | |
33 res = apply_closure_to_buffer(cl, _buf, _index, _sz, | |
34 consume, | |
35 (int) worker_i); | |
36 if (res && consume) _index = _sz; | |
37 } | |
38 return res; | |
39 } | |
40 | |
41 bool DirtyCardQueue::apply_closure_to_buffer(CardTableEntryClosure* cl, | |
42 void** buf, | |
43 size_t index, size_t sz, | |
44 bool consume, | |
45 int worker_i) { | |
46 if (cl == NULL) return true; | |
47 for (size_t i = index; i < sz; i += oopSize) { | |
48 int ind = byte_index_to_index((int)i); | |
49 jbyte* card_ptr = (jbyte*)buf[ind]; | |
50 if (card_ptr != NULL) { | |
51 // Set the entry to null, so we don't do it again (via the test | |
52 // above) if we reconsider this buffer. | |
53 if (consume) buf[ind] = NULL; | |
54 if (!cl->do_card_ptr(card_ptr, worker_i)) return false; | |
55 } | |
56 } | |
57 return true; | |
58 } | |
59 | |
60 #ifdef _MSC_VER // the use of 'this' below gets a warning, make it go away | |
61 #pragma warning( disable:4355 ) // 'this' : used in base member initializer list | |
62 #endif // _MSC_VER | |
63 | |
1111 | 64 DirtyCardQueueSet::DirtyCardQueueSet(bool notify_when_complete) : |
65 PtrQueueSet(notify_when_complete), | |
342 | 66 _closure(NULL), |
67 _shared_dirty_card_queue(this, true /*perm*/), | |
68 _free_ids(NULL), | |
69 _processed_buffers_mut(0), _processed_buffers_rs_thread(0) | |
70 { | |
71 _all_active = true; | |
72 } | |
73 | |
795
215f81b4d9b3
6841831: G1: assert(contains_reference(from),"We just added it!") fires
iveresov
parents:
794
diff
changeset
|
74 // Determines how many mutator threads can process the buffers in parallel. |
342 | 75 size_t DirtyCardQueueSet::num_par_ids() { |
795
215f81b4d9b3
6841831: G1: assert(contains_reference(from),"We just added it!") fires
iveresov
parents:
794
diff
changeset
|
76 return os::processor_count(); |
342 | 77 } |
78 | |
79 void DirtyCardQueueSet::initialize(Monitor* cbl_mon, Mutex* fl_lock, | |
1111 | 80 int process_completed_threshold, |
342 | 81 int max_completed_queue, |
616
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
470
diff
changeset
|
82 Mutex* lock, PtrQueueSet* fl_owner) { |
1111 | 83 PtrQueueSet::initialize(cbl_mon, fl_lock, process_completed_threshold, |
84 max_completed_queue, fl_owner); | |
883
27f6a9b9c311
6864886: G1: rename -XX parameters related to update buffers
tonyp
parents:
795
diff
changeset
|
85 set_buffer_size(G1UpdateBufferSize); |
342 | 86 _shared_dirty_card_queue.set_lock(lock); |
87 _free_ids = new FreeIdSet((int) num_par_ids(), _cbl_mon); | |
88 } | |
89 | |
90 void DirtyCardQueueSet::handle_zero_index_for_thread(JavaThread* t) { | |
91 t->dirty_card_queue().handle_zero_index(); | |
92 } | |
93 | |
94 void DirtyCardQueueSet::set_closure(CardTableEntryClosure* closure) { | |
95 _closure = closure; | |
96 } | |
97 | |
98 void DirtyCardQueueSet::iterate_closure_all_threads(bool consume, | |
99 size_t worker_i) { | |
100 assert(SafepointSynchronize::is_at_safepoint(), "Must be at safepoint."); | |
101 for(JavaThread* t = Threads::first(); t; t = t->next()) { | |
102 bool b = t->dirty_card_queue().apply_closure(_closure, consume); | |
103 guarantee(b, "Should not be interrupted."); | |
104 } | |
105 bool b = shared_dirty_card_queue()->apply_closure(_closure, | |
106 consume, | |
107 worker_i); | |
108 guarantee(b, "Should not be interrupted."); | |
109 } | |
110 | |
111 bool DirtyCardQueueSet::mut_process_buffer(void** buf) { | |
112 | |
113 // Used to determine if we had already claimed a par_id | |
114 // before entering this method. | |
115 bool already_claimed = false; | |
116 | |
117 // We grab the current JavaThread. | |
118 JavaThread* thread = JavaThread::current(); | |
119 | |
120 // We get the the number of any par_id that this thread | |
121 // might have already claimed. | |
122 int worker_i = thread->get_claimed_par_id(); | |
123 | |
124 // If worker_i is not -1 then the thread has already claimed | |
125 // a par_id. We make note of it using the already_claimed value | |
126 if (worker_i != -1) { | |
127 already_claimed = true; | |
128 } else { | |
129 | |
130 // Otherwise we need to claim a par id | |
131 worker_i = _free_ids->claim_par_id(); | |
132 | |
133 // And store the par_id value in the thread | |
134 thread->set_claimed_par_id(worker_i); | |
135 } | |
136 | |
137 bool b = false; | |
138 if (worker_i != -1) { | |
139 b = DirtyCardQueue::apply_closure_to_buffer(_closure, buf, 0, | |
140 _sz, true, worker_i); | |
141 if (b) Atomic::inc(&_processed_buffers_mut); | |
142 | |
143 // If we had not claimed an id before entering the method | |
144 // then we must release the id. | |
145 if (!already_claimed) { | |
146 | |
147 // we release the id | |
148 _free_ids->release_par_id(worker_i); | |
149 | |
150 // and set the claimed_id in the thread to -1 | |
151 thread->set_claimed_par_id(-1); | |
152 } | |
153 } | |
154 return b; | |
155 } | |
156 | |
1111 | 157 |
158 BufferNode* | |
1090
fa357420e7d2
6899058: G1: Internal error in ptrQueue.cpp:201 in nightly tests
johnc
parents:
885
diff
changeset
|
159 DirtyCardQueueSet::get_completed_buffer(int stop_at) { |
1111 | 160 BufferNode* nd = NULL; |
342 | 161 MutexLockerEx x(_cbl_mon, Mutex::_no_safepoint_check_flag); |
162 | |
163 if ((int)_n_completed_buffers <= stop_at) { | |
164 _process_completed = false; | |
165 return NULL; | |
166 } | |
167 | |
168 if (_completed_buffers_head != NULL) { | |
169 nd = _completed_buffers_head; | |
1111 | 170 _completed_buffers_head = nd->next(); |
342 | 171 if (_completed_buffers_head == NULL) |
172 _completed_buffers_tail = NULL; | |
173 _n_completed_buffers--; | |
1111 | 174 assert(_n_completed_buffers >= 0, "Invariant"); |
342 | 175 } |
176 debug_only(assert_completed_buffer_list_len_correct_locked()); | |
177 return nd; | |
178 } | |
179 | |
180 bool DirtyCardQueueSet:: | |
1705 | 181 apply_closure_to_completed_buffer_helper(CardTableEntryClosure* cl, |
182 int worker_i, | |
1111 | 183 BufferNode* nd) { |
342 | 184 if (nd != NULL) { |
1111 | 185 void **buf = BufferNode::make_buffer_from_node(nd); |
186 size_t index = nd->index(); | |
342 | 187 bool b = |
1705 | 188 DirtyCardQueue::apply_closure_to_buffer(cl, buf, |
1111 | 189 index, _sz, |
342 | 190 true, worker_i); |
191 if (b) { | |
192 deallocate_buffer(buf); | |
193 return true; // In normal case, go on to next buffer. | |
194 } else { | |
1111 | 195 enqueue_complete_buffer(buf, index); |
342 | 196 return false; |
197 } | |
198 } else { | |
199 return false; | |
200 } | |
201 } | |
202 | |
1705 | 203 bool DirtyCardQueueSet::apply_closure_to_completed_buffer(CardTableEntryClosure* cl, |
204 int worker_i, | |
205 int stop_at, | |
206 bool during_pause) { | |
207 assert(!during_pause || stop_at == 0, "Should not leave any completed buffers during a pause"); | |
208 BufferNode* nd = get_completed_buffer(stop_at); | |
209 bool res = apply_closure_to_completed_buffer_helper(cl, worker_i, nd); | |
210 if (res) Atomic::inc(&_processed_buffers_rs_thread); | |
211 return res; | |
212 } | |
213 | |
342 | 214 bool DirtyCardQueueSet::apply_closure_to_completed_buffer(int worker_i, |
215 int stop_at, | |
1705 | 216 bool during_pause) { |
217 return apply_closure_to_completed_buffer(_closure, worker_i, | |
218 stop_at, during_pause); | |
342 | 219 } |
220 | |
221 void DirtyCardQueueSet::apply_closure_to_all_completed_buffers() { | |
1111 | 222 BufferNode* nd = _completed_buffers_head; |
342 | 223 while (nd != NULL) { |
224 bool b = | |
1111 | 225 DirtyCardQueue::apply_closure_to_buffer(_closure, |
226 BufferNode::make_buffer_from_node(nd), | |
227 0, _sz, false); | |
342 | 228 guarantee(b, "Should not stop early."); |
1111 | 229 nd = nd->next(); |
342 | 230 } |
231 } | |
232 | |
1705 | 233 // Deallocates any completed log buffers |
234 void DirtyCardQueueSet::clear() { | |
1111 | 235 BufferNode* buffers_to_delete = NULL; |
342 | 236 { |
237 MutexLockerEx x(_cbl_mon, Mutex::_no_safepoint_check_flag); | |
238 while (_completed_buffers_head != NULL) { | |
1111 | 239 BufferNode* nd = _completed_buffers_head; |
240 _completed_buffers_head = nd->next(); | |
241 nd->set_next(buffers_to_delete); | |
342 | 242 buffers_to_delete = nd; |
243 } | |
244 _n_completed_buffers = 0; | |
245 _completed_buffers_tail = NULL; | |
246 debug_only(assert_completed_buffer_list_len_correct_locked()); | |
247 } | |
248 while (buffers_to_delete != NULL) { | |
1111 | 249 BufferNode* nd = buffers_to_delete; |
250 buffers_to_delete = nd->next(); | |
251 deallocate_buffer(BufferNode::make_buffer_from_node(nd)); | |
342 | 252 } |
1705 | 253 |
254 } | |
255 | |
256 void DirtyCardQueueSet::abandon_logs() { | |
257 assert(SafepointSynchronize::is_at_safepoint(), "Must be at safepoint."); | |
258 clear(); | |
342 | 259 // Since abandon is done only at safepoints, we can safely manipulate |
260 // these queues. | |
261 for (JavaThread* t = Threads::first(); t; t = t->next()) { | |
262 t->dirty_card_queue().reset(); | |
263 } | |
264 shared_dirty_card_queue()->reset(); | |
265 } | |
266 | |
267 | |
268 void DirtyCardQueueSet::concatenate_logs() { | |
269 // Iterate over all the threads, if we find a partial log add it to | |
270 // the global list of logs. Temporarily turn off the limit on the number | |
271 // of outstanding buffers. | |
272 int save_max_completed_queue = _max_completed_queue; | |
273 _max_completed_queue = max_jint; | |
274 assert(SafepointSynchronize::is_at_safepoint(), "Must be at safepoint."); | |
275 for (JavaThread* t = Threads::first(); t; t = t->next()) { | |
276 DirtyCardQueue& dcq = t->dirty_card_queue(); | |
277 if (dcq.size() != 0) { | |
278 void **buf = t->dirty_card_queue().get_buf(); | |
279 // We must NULL out the unused entries, then enqueue. | |
280 for (size_t i = 0; i < t->dirty_card_queue().get_index(); i += oopSize) { | |
281 buf[PtrQueue::byte_index_to_index((int)i)] = NULL; | |
282 } | |
283 enqueue_complete_buffer(dcq.get_buf(), dcq.get_index()); | |
284 dcq.reinitialize(); | |
285 } | |
286 } | |
287 if (_shared_dirty_card_queue.size() != 0) { | |
288 enqueue_complete_buffer(_shared_dirty_card_queue.get_buf(), | |
289 _shared_dirty_card_queue.get_index()); | |
290 _shared_dirty_card_queue.reinitialize(); | |
291 } | |
292 // Restore the completed buffer queue limit. | |
293 _max_completed_queue = save_max_completed_queue; | |
294 } |