Mercurial > hg > truffle
annotate src/share/vm/gc_implementation/parallelScavenge/pcTasks.cpp @ 17674:85318d1fe8fe
8027146: Class loading verification failure if GC occurs in Universe::flush_dependents_on
Summary: Remove search in system dictionary and hacks, replace with verifying in CLD::_klasses list.
Reviewed-by: dcubed, acorn
author | coleenp |
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date | Sat, 15 Feb 2014 13:03:38 -0500 |
parents | f2110083203d |
children | 78bbf4d43a14 |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 2005, 2013, Oracle and/or its affiliates. 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 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #include "precompiled.hpp" |
26 #include "classfile/systemDictionary.hpp" | |
27 #include "code/codeCache.hpp" | |
28 #include "gc_implementation/parallelScavenge/pcTasks.hpp" | |
29 #include "gc_implementation/parallelScavenge/psParallelCompact.hpp" | |
10405 | 30 #include "gc_implementation/shared/gcTimer.hpp" |
31 #include "gc_implementation/shared/gcTraceTime.hpp" | |
1972 | 32 #include "gc_interface/collectedHeap.hpp" |
33 #include "memory/universe.hpp" | |
34 #include "oops/objArrayKlass.inline.hpp" | |
35 #include "oops/oop.inline.hpp" | |
36 #include "oops/oop.pcgc.inline.hpp" | |
37 #include "prims/jvmtiExport.hpp" | |
38 #include "runtime/fprofiler.hpp" | |
39 #include "runtime/jniHandles.hpp" | |
40 #include "runtime/thread.hpp" | |
41 #include "runtime/vmThread.hpp" | |
42 #include "services/management.hpp" | |
0 | 43 |
44 // | |
45 // ThreadRootsMarkingTask | |
46 // | |
47 | |
48 void ThreadRootsMarkingTask::do_it(GCTaskManager* manager, uint which) { | |
49 assert(Universe::heap()->is_gc_active(), "called outside gc"); | |
50 | |
51 ResourceMark rm; | |
52 | |
10405 | 53 NOT_PRODUCT(GCTraceTime tm("ThreadRootsMarkingTask", |
54 PrintGCDetails && TraceParallelOldGCTasks, true, NULL)); | |
0 | 55 ParCompactionManager* cm = |
56 ParCompactionManager::gc_thread_compaction_manager(which); | |
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57 |
0 | 58 PSParallelCompact::MarkAndPushClosure mark_and_push_closure(cm); |
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59 CLDToOopClosure mark_and_push_from_clds(&mark_and_push_closure, true); |
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60 CodeBlobToOopClosure mark_and_push_in_blobs(&mark_and_push_closure, /*do_marking=*/ true); |
0 | 61 |
62 if (_java_thread != NULL) | |
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63 _java_thread->oops_do( |
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64 &mark_and_push_closure, |
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65 &mark_and_push_from_clds, |
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66 &mark_and_push_in_blobs); |
0 | 67 |
68 if (_vm_thread != NULL) | |
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69 _vm_thread->oops_do( |
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70 &mark_and_push_closure, |
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71 &mark_and_push_from_clds, |
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72 &mark_and_push_in_blobs); |
0 | 73 |
74 // Do the real work | |
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75 cm->follow_marking_stacks(); |
0 | 76 } |
77 | |
78 | |
79 void MarkFromRootsTask::do_it(GCTaskManager* manager, uint which) { | |
80 assert(Universe::heap()->is_gc_active(), "called outside gc"); | |
81 | |
10405 | 82 NOT_PRODUCT(GCTraceTime tm("MarkFromRootsTask", |
83 PrintGCDetails && TraceParallelOldGCTasks, true, NULL)); | |
0 | 84 ParCompactionManager* cm = |
85 ParCompactionManager::gc_thread_compaction_manager(which); | |
86 PSParallelCompact::MarkAndPushClosure mark_and_push_closure(cm); | |
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87 PSParallelCompact::FollowKlassClosure follow_klass_closure(&mark_and_push_closure); |
0 | 88 |
89 switch (_root_type) { | |
90 case universe: | |
91 Universe::oops_do(&mark_and_push_closure); | |
92 break; | |
93 | |
94 case jni_handles: | |
95 JNIHandles::oops_do(&mark_and_push_closure); | |
96 break; | |
97 | |
98 case threads: | |
99 { | |
100 ResourceMark rm; | |
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101 CodeBlobToOopClosure each_active_code_blob(&mark_and_push_closure, /*do_marking=*/ true); |
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102 CLDToOopClosure mark_and_push_from_cld(&mark_and_push_closure); |
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103 Threads::oops_do(&mark_and_push_closure, &mark_and_push_from_cld, &each_active_code_blob); |
0 | 104 } |
105 break; | |
106 | |
107 case object_synchronizer: | |
108 ObjectSynchronizer::oops_do(&mark_and_push_closure); | |
109 break; | |
110 | |
111 case flat_profiler: | |
112 FlatProfiler::oops_do(&mark_and_push_closure); | |
113 break; | |
114 | |
115 case management: | |
116 Management::oops_do(&mark_and_push_closure); | |
117 break; | |
118 | |
119 case jvmti: | |
120 JvmtiExport::oops_do(&mark_and_push_closure); | |
121 break; | |
122 | |
123 case system_dictionary: | |
124 SystemDictionary::always_strong_oops_do(&mark_and_push_closure); | |
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125 break; |
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126 |
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127 case class_loader_data: |
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128 ClassLoaderDataGraph::always_strong_oops_do(&mark_and_push_closure, &follow_klass_closure, true); |
0 | 129 break; |
130 | |
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131 case code_cache: |
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132 // Do not treat nmethods as strong roots for mark/sweep, since we can unload them. |
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133 //CodeCache::scavenge_root_nmethods_do(CodeBlobToOopClosure(&mark_and_push_closure)); |
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134 break; |
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135 |
0 | 136 default: |
137 fatal("Unknown root type"); | |
138 } | |
139 | |
140 // Do the real work | |
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141 cm->follow_marking_stacks(); |
0 | 142 } |
143 | |
144 | |
145 // | |
146 // RefProcTaskProxy | |
147 // | |
148 | |
149 void RefProcTaskProxy::do_it(GCTaskManager* manager, uint which) | |
150 { | |
151 assert(Universe::heap()->is_gc_active(), "called outside gc"); | |
152 | |
10405 | 153 NOT_PRODUCT(GCTraceTime tm("RefProcTask", |
154 PrintGCDetails && TraceParallelOldGCTasks, true, NULL)); | |
0 | 155 ParCompactionManager* cm = |
156 ParCompactionManager::gc_thread_compaction_manager(which); | |
157 PSParallelCompact::MarkAndPushClosure mark_and_push_closure(cm); | |
158 PSParallelCompact::FollowStackClosure follow_stack_closure(cm); | |
159 _rp_task.work(_work_id, *PSParallelCompact::is_alive_closure(), | |
160 mark_and_push_closure, follow_stack_closure); | |
161 } | |
162 | |
163 // | |
164 // RefProcTaskExecutor | |
165 // | |
166 | |
167 void RefProcTaskExecutor::execute(ProcessTask& task) | |
168 { | |
169 ParallelScavengeHeap* heap = PSParallelCompact::gc_heap(); | |
170 uint parallel_gc_threads = heap->gc_task_manager()->workers(); | |
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171 uint active_gc_threads = heap->gc_task_manager()->active_workers(); |
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172 RegionTaskQueueSet* qset = ParCompactionManager::region_array(); |
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173 ParallelTaskTerminator terminator(active_gc_threads, qset); |
0 | 174 GCTaskQueue* q = GCTaskQueue::create(); |
175 for(uint i=0; i<parallel_gc_threads; i++) { | |
176 q->enqueue(new RefProcTaskProxy(task, i)); | |
177 } | |
178 if (task.marks_oops_alive()) { | |
179 if (parallel_gc_threads>1) { | |
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180 for (uint j=0; j<active_gc_threads; j++) { |
0 | 181 q->enqueue(new StealMarkingTask(&terminator)); |
182 } | |
183 } | |
184 } | |
185 PSParallelCompact::gc_task_manager()->execute_and_wait(q); | |
186 } | |
187 | |
188 void RefProcTaskExecutor::execute(EnqueueTask& task) | |
189 { | |
190 ParallelScavengeHeap* heap = PSParallelCompact::gc_heap(); | |
191 uint parallel_gc_threads = heap->gc_task_manager()->workers(); | |
192 GCTaskQueue* q = GCTaskQueue::create(); | |
193 for(uint i=0; i<parallel_gc_threads; i++) { | |
194 q->enqueue(new RefEnqueueTaskProxy(task, i)); | |
195 } | |
196 PSParallelCompact::gc_task_manager()->execute_and_wait(q); | |
197 } | |
198 | |
199 // | |
200 // StealMarkingTask | |
201 // | |
202 | |
203 StealMarkingTask::StealMarkingTask(ParallelTaskTerminator* t) : | |
204 _terminator(t) {} | |
205 | |
206 void StealMarkingTask::do_it(GCTaskManager* manager, uint which) { | |
207 assert(Universe::heap()->is_gc_active(), "called outside gc"); | |
208 | |
10405 | 209 NOT_PRODUCT(GCTraceTime tm("StealMarkingTask", |
210 PrintGCDetails && TraceParallelOldGCTasks, true, NULL)); | |
0 | 211 |
212 ParCompactionManager* cm = | |
213 ParCompactionManager::gc_thread_compaction_manager(which); | |
214 PSParallelCompact::MarkAndPushClosure mark_and_push_closure(cm); | |
215 | |
216 oop obj = NULL; | |
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217 ObjArrayTask task; |
0 | 218 int random_seed = 17; |
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219 do { |
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220 while (ParCompactionManager::steal_objarray(which, &random_seed, task)) { |
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221 ObjArrayKlass* k = (ObjArrayKlass*)task.obj()->klass(); |
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222 k->oop_follow_contents(cm, task.obj(), task.index()); |
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223 cm->follow_marking_stacks(); |
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224 } |
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225 while (ParCompactionManager::steal(which, &random_seed, obj)) { |
0 | 226 obj->follow_contents(cm); |
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227 cm->follow_marking_stacks(); |
0 | 228 } |
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229 } while (!terminator()->offer_termination()); |
0 | 230 } |
231 | |
232 // | |
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233 // StealRegionCompactionTask |
0 | 234 // |
235 | |
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236 StealRegionCompactionTask::StealRegionCompactionTask(ParallelTaskTerminator* t): |
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237 _terminator(t) {} |
0 | 238 |
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239 void StealRegionCompactionTask::do_it(GCTaskManager* manager, uint which) { |
0 | 240 assert(Universe::heap()->is_gc_active(), "called outside gc"); |
241 | |
10405 | 242 NOT_PRODUCT(GCTraceTime tm("StealRegionCompactionTask", |
243 PrintGCDetails && TraceParallelOldGCTasks, true, NULL)); | |
0 | 244 |
245 ParCompactionManager* cm = | |
246 ParCompactionManager::gc_thread_compaction_manager(which); | |
247 | |
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248 |
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249 // If not all threads are active, get a draining stack |
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250 // from the list. Else, just use this threads draining stack. |
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251 uint which_stack_index; |
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252 bool use_all_workers = manager->all_workers_active(); |
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253 if (use_all_workers) { |
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254 which_stack_index = which; |
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255 assert(manager->active_workers() == ParallelGCThreads, |
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256 err_msg("all_workers_active has been incorrectly set: " |
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257 " active %d ParallelGCThreads %d", manager->active_workers(), |
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258 ParallelGCThreads)); |
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259 } else { |
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260 which_stack_index = ParCompactionManager::pop_recycled_stack_index(); |
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261 } |
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262 |
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263 cm->set_region_stack_index(which_stack_index); |
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264 cm->set_region_stack(ParCompactionManager::region_list(which_stack_index)); |
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265 if (TraceDynamicGCThreads) { |
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266 gclog_or_tty->print_cr("StealRegionCompactionTask::do_it " |
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267 "region_stack_index %d region_stack = 0x%x " |
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268 " empty (%d) use all workers %d", |
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269 which_stack_index, ParCompactionManager::region_list(which_stack_index), |
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270 cm->region_stack()->is_empty(), |
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271 use_all_workers); |
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272 } |
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273 |
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274 // Has to drain stacks first because there may be regions on |
0 | 275 // preloaded onto the stack and this thread may never have |
276 // done a draining task. Are the draining tasks needed? | |
277 | |
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278 cm->drain_region_stacks(); |
0 | 279 |
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280 size_t region_index = 0; |
0 | 281 int random_seed = 17; |
282 | |
283 // If we're the termination task, try 10 rounds of stealing before | |
284 // setting the termination flag | |
285 | |
286 while(true) { | |
375
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287 if (ParCompactionManager::steal(which, &random_seed, region_index)) { |
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288 PSParallelCompact::fill_and_update_region(cm, region_index); |
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289 cm->drain_region_stacks(); |
0 | 290 } else { |
291 if (terminator()->offer_termination()) { | |
292 break; | |
293 } | |
294 // Go around again. | |
295 } | |
296 } | |
297 return; | |
298 } | |
299 | |
300 UpdateDensePrefixTask::UpdateDensePrefixTask( | |
301 PSParallelCompact::SpaceId space_id, | |
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302 size_t region_index_start, |
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303 size_t region_index_end) : |
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304 _space_id(space_id), _region_index_start(region_index_start), |
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305 _region_index_end(region_index_end) {} |
0 | 306 |
307 void UpdateDensePrefixTask::do_it(GCTaskManager* manager, uint which) { | |
308 | |
10405 | 309 NOT_PRODUCT(GCTraceTime tm("UpdateDensePrefixTask", |
310 PrintGCDetails && TraceParallelOldGCTasks, true, NULL)); | |
0 | 311 |
312 ParCompactionManager* cm = | |
313 ParCompactionManager::gc_thread_compaction_manager(which); | |
314 | |
315 PSParallelCompact::update_and_deadwood_in_dense_prefix(cm, | |
316 _space_id, | |
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317 _region_index_start, |
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318 _region_index_end); |
0 | 319 } |
320 | |
321 void DrainStacksCompactionTask::do_it(GCTaskManager* manager, uint which) { | |
322 assert(Universe::heap()->is_gc_active(), "called outside gc"); | |
323 | |
10405 | 324 NOT_PRODUCT(GCTraceTime tm("DrainStacksCompactionTask", |
325 PrintGCDetails && TraceParallelOldGCTasks, true, NULL)); | |
0 | 326 |
327 ParCompactionManager* cm = | |
328 ParCompactionManager::gc_thread_compaction_manager(which); | |
329 | |
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330 uint which_stack_index; |
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331 bool use_all_workers = manager->all_workers_active(); |
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332 if (use_all_workers) { |
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333 which_stack_index = which; |
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334 assert(manager->active_workers() == ParallelGCThreads, |
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335 err_msg("all_workers_active has been incorrectly set: " |
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336 " active %d ParallelGCThreads %d", manager->active_workers(), |
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337 ParallelGCThreads)); |
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338 } else { |
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339 which_stack_index = stack_index(); |
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340 } |
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341 |
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342 cm->set_region_stack(ParCompactionManager::region_list(which_stack_index)); |
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343 if (TraceDynamicGCThreads) { |
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344 gclog_or_tty->print_cr("DrainStacksCompactionTask::do_it which = %d " |
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345 "which_stack_index = %d/empty(%d) " |
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346 "use all workers %d", |
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347 which, which_stack_index, |
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348 cm->region_stack()->is_empty(), |
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349 use_all_workers); |
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350 } |
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351 |
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352 cm->set_region_stack_index(which_stack_index); |
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353 |
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354 // Process any regions already in the compaction managers stacks. |
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355 cm->drain_region_stacks(); |
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356 |
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357 assert(cm->region_stack()->is_empty(), "Not empty"); |
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358 |
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359 if (!use_all_workers) { |
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360 // Always give up the region stack. |
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361 assert(cm->region_stack() == |
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362 ParCompactionManager::region_list(cm->region_stack_index()), |
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363 "region_stack and region_stack_index are inconsistent"); |
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364 ParCompactionManager::push_recycled_stack_index(cm->region_stack_index()); |
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365 |
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366 if (TraceDynamicGCThreads) { |
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367 void* old_region_stack = (void*) cm->region_stack(); |
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368 int old_region_stack_index = cm->region_stack_index(); |
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369 gclog_or_tty->print_cr("Pushing region stack 0x%x/%d", |
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370 old_region_stack, old_region_stack_index); |
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371 } |
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372 |
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373 cm->set_region_stack(NULL); |
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374 cm->set_region_stack_index((uint)max_uintx); |
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375 } |
0 | 376 } |