Mercurial > hg > graal-jvmci-8
annotate src/share/vm/gc_implementation/parallelScavenge/pcTasks.cpp @ 7179:d0aa87f04bd5
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Summary: Pass down a closure during root scanning to keep the class of the method alive.
Reviewed-by: coleenp, jcoomes
author | stefank |
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date | Tue, 27 Nov 2012 10:13:20 +0100 |
parents | d8ce2825b193 |
children | 92ef81e2f571 |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 2005, 2012, 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" | |
30 #include "gc_interface/collectedHeap.hpp" | |
31 #include "memory/universe.hpp" | |
32 #include "oops/objArrayKlass.inline.hpp" | |
33 #include "oops/oop.inline.hpp" | |
34 #include "oops/oop.pcgc.inline.hpp" | |
35 #include "prims/jvmtiExport.hpp" | |
36 #include "runtime/fprofiler.hpp" | |
37 #include "runtime/jniHandles.hpp" | |
38 #include "runtime/thread.hpp" | |
39 #include "runtime/vmThread.hpp" | |
40 #include "services/management.hpp" | |
0 | 41 |
42 // | |
43 // ThreadRootsMarkingTask | |
44 // | |
45 | |
46 void ThreadRootsMarkingTask::do_it(GCTaskManager* manager, uint which) { | |
47 assert(Universe::heap()->is_gc_active(), "called outside gc"); | |
48 | |
49 ResourceMark rm; | |
50 | |
51 NOT_PRODUCT(TraceTime tm("ThreadRootsMarkingTask", | |
52 PrintGCDetails && TraceParallelOldGCTasks, true, gclog_or_tty)); | |
53 ParCompactionManager* cm = | |
54 ParCompactionManager::gc_thread_compaction_manager(which); | |
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55 |
0 | 56 PSParallelCompact::MarkAndPushClosure mark_and_push_closure(cm); |
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57 CLDToOopClosure mark_and_push_from_clds(&mark_and_push_closure, true); |
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58 CodeBlobToOopClosure mark_and_push_in_blobs(&mark_and_push_closure, /*do_marking=*/ true); |
0 | 59 |
60 if (_java_thread != NULL) | |
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61 _java_thread->oops_do( |
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62 &mark_and_push_closure, |
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63 &mark_and_push_from_clds, |
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64 &mark_and_push_in_blobs); |
0 | 65 |
66 if (_vm_thread != NULL) | |
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67 _vm_thread->oops_do( |
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68 &mark_and_push_closure, |
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69 &mark_and_push_from_clds, |
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70 &mark_and_push_in_blobs); |
0 | 71 |
72 // Do the real work | |
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73 cm->follow_marking_stacks(); |
0 | 74 } |
75 | |
76 | |
77 void MarkFromRootsTask::do_it(GCTaskManager* manager, uint which) { | |
78 assert(Universe::heap()->is_gc_active(), "called outside gc"); | |
79 | |
80 NOT_PRODUCT(TraceTime tm("MarkFromRootsTask", | |
81 PrintGCDetails && TraceParallelOldGCTasks, true, gclog_or_tty)); | |
82 ParCompactionManager* cm = | |
83 ParCompactionManager::gc_thread_compaction_manager(which); | |
84 PSParallelCompact::MarkAndPushClosure mark_and_push_closure(cm); | |
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85 PSParallelCompact::FollowKlassClosure follow_klass_closure(&mark_and_push_closure); |
0 | 86 |
87 switch (_root_type) { | |
88 case universe: | |
89 Universe::oops_do(&mark_and_push_closure); | |
90 break; | |
91 | |
92 case jni_handles: | |
93 JNIHandles::oops_do(&mark_and_push_closure); | |
94 break; | |
95 | |
96 case threads: | |
97 { | |
98 ResourceMark rm; | |
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99 CodeBlobToOopClosure each_active_code_blob(&mark_and_push_closure, /*do_marking=*/ true); |
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100 CLDToOopClosure mark_and_push_from_cld(&mark_and_push_closure); |
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101 Threads::oops_do(&mark_and_push_closure, &mark_and_push_from_cld, &each_active_code_blob); |
0 | 102 } |
103 break; | |
104 | |
105 case object_synchronizer: | |
106 ObjectSynchronizer::oops_do(&mark_and_push_closure); | |
107 break; | |
108 | |
109 case flat_profiler: | |
110 FlatProfiler::oops_do(&mark_and_push_closure); | |
111 break; | |
112 | |
113 case management: | |
114 Management::oops_do(&mark_and_push_closure); | |
115 break; | |
116 | |
117 case jvmti: | |
118 JvmtiExport::oops_do(&mark_and_push_closure); | |
119 break; | |
120 | |
121 case system_dictionary: | |
122 SystemDictionary::always_strong_oops_do(&mark_and_push_closure); | |
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123 ClassLoaderDataGraph::always_strong_oops_do(&mark_and_push_closure, &follow_klass_closure, true); |
0 | 124 break; |
125 | |
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126 case code_cache: |
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127 // Do not treat nmethods as strong roots for mark/sweep, since we can unload them. |
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128 //CodeCache::scavenge_root_nmethods_do(CodeBlobToOopClosure(&mark_and_push_closure)); |
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129 break; |
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130 |
0 | 131 default: |
132 fatal("Unknown root type"); | |
133 } | |
134 | |
135 // Do the real work | |
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136 cm->follow_marking_stacks(); |
0 | 137 } |
138 | |
139 | |
140 // | |
141 // RefProcTaskProxy | |
142 // | |
143 | |
144 void RefProcTaskProxy::do_it(GCTaskManager* manager, uint which) | |
145 { | |
146 assert(Universe::heap()->is_gc_active(), "called outside gc"); | |
147 | |
148 NOT_PRODUCT(TraceTime tm("RefProcTask", | |
149 PrintGCDetails && TraceParallelOldGCTasks, true, gclog_or_tty)); | |
150 ParCompactionManager* cm = | |
151 ParCompactionManager::gc_thread_compaction_manager(which); | |
152 PSParallelCompact::MarkAndPushClosure mark_and_push_closure(cm); | |
153 PSParallelCompact::FollowStackClosure follow_stack_closure(cm); | |
154 _rp_task.work(_work_id, *PSParallelCompact::is_alive_closure(), | |
155 mark_and_push_closure, follow_stack_closure); | |
156 } | |
157 | |
158 // | |
159 // RefProcTaskExecutor | |
160 // | |
161 | |
162 void RefProcTaskExecutor::execute(ProcessTask& task) | |
163 { | |
164 ParallelScavengeHeap* heap = PSParallelCompact::gc_heap(); | |
165 uint parallel_gc_threads = heap->gc_task_manager()->workers(); | |
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166 uint active_gc_threads = heap->gc_task_manager()->active_workers(); |
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167 RegionTaskQueueSet* qset = ParCompactionManager::region_array(); |
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168 ParallelTaskTerminator terminator(active_gc_threads, qset); |
0 | 169 GCTaskQueue* q = GCTaskQueue::create(); |
170 for(uint i=0; i<parallel_gc_threads; i++) { | |
171 q->enqueue(new RefProcTaskProxy(task, i)); | |
172 } | |
173 if (task.marks_oops_alive()) { | |
174 if (parallel_gc_threads>1) { | |
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175 for (uint j=0; j<active_gc_threads; j++) { |
0 | 176 q->enqueue(new StealMarkingTask(&terminator)); |
177 } | |
178 } | |
179 } | |
180 PSParallelCompact::gc_task_manager()->execute_and_wait(q); | |
181 } | |
182 | |
183 void RefProcTaskExecutor::execute(EnqueueTask& task) | |
184 { | |
185 ParallelScavengeHeap* heap = PSParallelCompact::gc_heap(); | |
186 uint parallel_gc_threads = heap->gc_task_manager()->workers(); | |
187 GCTaskQueue* q = GCTaskQueue::create(); | |
188 for(uint i=0; i<parallel_gc_threads; i++) { | |
189 q->enqueue(new RefEnqueueTaskProxy(task, i)); | |
190 } | |
191 PSParallelCompact::gc_task_manager()->execute_and_wait(q); | |
192 } | |
193 | |
194 // | |
195 // StealMarkingTask | |
196 // | |
197 | |
198 StealMarkingTask::StealMarkingTask(ParallelTaskTerminator* t) : | |
199 _terminator(t) {} | |
200 | |
201 void StealMarkingTask::do_it(GCTaskManager* manager, uint which) { | |
202 assert(Universe::heap()->is_gc_active(), "called outside gc"); | |
203 | |
204 NOT_PRODUCT(TraceTime tm("StealMarkingTask", | |
205 PrintGCDetails && TraceParallelOldGCTasks, true, gclog_or_tty)); | |
206 | |
207 ParCompactionManager* cm = | |
208 ParCompactionManager::gc_thread_compaction_manager(which); | |
209 PSParallelCompact::MarkAndPushClosure mark_and_push_closure(cm); | |
210 | |
211 oop obj = NULL; | |
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212 ObjArrayTask task; |
0 | 213 int random_seed = 17; |
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214 do { |
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215 while (ParCompactionManager::steal_objarray(which, &random_seed, task)) { |
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216 ObjArrayKlass* const k = (ObjArrayKlass*)task.obj()->klass(); |
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217 k->oop_follow_contents(cm, task.obj(), task.index()); |
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218 cm->follow_marking_stacks(); |
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219 } |
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220 while (ParCompactionManager::steal(which, &random_seed, obj)) { |
0 | 221 obj->follow_contents(cm); |
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222 cm->follow_marking_stacks(); |
0 | 223 } |
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224 } while (!terminator()->offer_termination()); |
0 | 225 } |
226 | |
227 // | |
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228 // StealRegionCompactionTask |
0 | 229 // |
230 | |
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231 StealRegionCompactionTask::StealRegionCompactionTask(ParallelTaskTerminator* t): |
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232 _terminator(t) {} |
0 | 233 |
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234 void StealRegionCompactionTask::do_it(GCTaskManager* manager, uint which) { |
0 | 235 assert(Universe::heap()->is_gc_active(), "called outside gc"); |
236 | |
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237 NOT_PRODUCT(TraceTime tm("StealRegionCompactionTask", |
0 | 238 PrintGCDetails && TraceParallelOldGCTasks, true, gclog_or_tty)); |
239 | |
240 ParCompactionManager* cm = | |
241 ParCompactionManager::gc_thread_compaction_manager(which); | |
242 | |
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243 |
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244 // If not all threads are active, get a draining stack |
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245 // from the list. Else, just use this threads draining stack. |
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246 uint which_stack_index; |
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247 bool use_all_workers = manager->all_workers_active(); |
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248 if (use_all_workers) { |
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249 which_stack_index = which; |
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250 assert(manager->active_workers() == ParallelGCThreads, |
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251 err_msg("all_workers_active has been incorrectly set: " |
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252 " active %d ParallelGCThreads %d", manager->active_workers(), |
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253 ParallelGCThreads)); |
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254 } else { |
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255 which_stack_index = ParCompactionManager::pop_recycled_stack_index(); |
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256 } |
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257 |
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258 cm->set_region_stack_index(which_stack_index); |
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259 cm->set_region_stack(ParCompactionManager::region_list(which_stack_index)); |
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260 if (TraceDynamicGCThreads) { |
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261 gclog_or_tty->print_cr("StealRegionCompactionTask::do_it " |
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262 "region_stack_index %d region_stack = 0x%x " |
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263 " empty (%d) use all workers %d", |
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264 which_stack_index, ParCompactionManager::region_list(which_stack_index), |
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265 cm->region_stack()->is_empty(), |
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266 use_all_workers); |
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267 } |
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268 |
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269 // Has to drain stacks first because there may be regions on |
0 | 270 // preloaded onto the stack and this thread may never have |
271 // done a draining task. Are the draining tasks needed? | |
272 | |
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273 cm->drain_region_stacks(); |
0 | 274 |
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275 size_t region_index = 0; |
0 | 276 int random_seed = 17; |
277 | |
278 // If we're the termination task, try 10 rounds of stealing before | |
279 // setting the termination flag | |
280 | |
281 while(true) { | |
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282 if (ParCompactionManager::steal(which, &random_seed, region_index)) { |
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283 PSParallelCompact::fill_and_update_region(cm, region_index); |
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284 cm->drain_region_stacks(); |
0 | 285 } else { |
286 if (terminator()->offer_termination()) { | |
287 break; | |
288 } | |
289 // Go around again. | |
290 } | |
291 } | |
292 return; | |
293 } | |
294 | |
295 UpdateDensePrefixTask::UpdateDensePrefixTask( | |
296 PSParallelCompact::SpaceId space_id, | |
375
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297 size_t region_index_start, |
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298 size_t region_index_end) : |
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299 _space_id(space_id), _region_index_start(region_index_start), |
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300 _region_index_end(region_index_end) {} |
0 | 301 |
302 void UpdateDensePrefixTask::do_it(GCTaskManager* manager, uint which) { | |
303 | |
304 NOT_PRODUCT(TraceTime tm("UpdateDensePrefixTask", | |
305 PrintGCDetails && TraceParallelOldGCTasks, true, gclog_or_tty)); | |
306 | |
307 ParCompactionManager* cm = | |
308 ParCompactionManager::gc_thread_compaction_manager(which); | |
309 | |
310 PSParallelCompact::update_and_deadwood_in_dense_prefix(cm, | |
311 _space_id, | |
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312 _region_index_start, |
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313 _region_index_end); |
0 | 314 } |
315 | |
316 void DrainStacksCompactionTask::do_it(GCTaskManager* manager, uint which) { | |
317 assert(Universe::heap()->is_gc_active(), "called outside gc"); | |
318 | |
319 NOT_PRODUCT(TraceTime tm("DrainStacksCompactionTask", | |
320 PrintGCDetails && TraceParallelOldGCTasks, true, gclog_or_tty)); | |
321 | |
322 ParCompactionManager* cm = | |
323 ParCompactionManager::gc_thread_compaction_manager(which); | |
324 | |
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325 uint which_stack_index; |
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326 bool use_all_workers = manager->all_workers_active(); |
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327 if (use_all_workers) { |
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328 which_stack_index = which; |
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329 assert(manager->active_workers() == ParallelGCThreads, |
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330 err_msg("all_workers_active has been incorrectly set: " |
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331 " active %d ParallelGCThreads %d", manager->active_workers(), |
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332 ParallelGCThreads)); |
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333 } else { |
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334 which_stack_index = stack_index(); |
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335 } |
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336 |
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337 cm->set_region_stack(ParCompactionManager::region_list(which_stack_index)); |
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338 if (TraceDynamicGCThreads) { |
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339 gclog_or_tty->print_cr("DrainStacksCompactionTask::do_it which = %d " |
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340 "which_stack_index = %d/empty(%d) " |
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341 "use all workers %d", |
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342 which, which_stack_index, |
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343 cm->region_stack()->is_empty(), |
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344 use_all_workers); |
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345 } |
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346 |
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347 cm->set_region_stack_index(which_stack_index); |
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348 |
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349 // Process any regions already in the compaction managers stacks. |
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350 cm->drain_region_stacks(); |
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351 |
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352 assert(cm->region_stack()->is_empty(), "Not empty"); |
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353 |
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354 if (!use_all_workers) { |
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355 // Always give up the region stack. |
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356 assert(cm->region_stack() == |
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357 ParCompactionManager::region_list(cm->region_stack_index()), |
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358 "region_stack and region_stack_index are inconsistent"); |
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359 ParCompactionManager::push_recycled_stack_index(cm->region_stack_index()); |
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360 |
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361 if (TraceDynamicGCThreads) { |
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362 void* old_region_stack = (void*) cm->region_stack(); |
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363 int old_region_stack_index = cm->region_stack_index(); |
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364 gclog_or_tty->print_cr("Pushing region stack 0x%x/%d", |
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365 old_region_stack, old_region_stack_index); |
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366 } |
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367 |
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368 cm->set_region_stack(NULL); |
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369 cm->set_region_stack_index((uint)max_uintx); |
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370 } |
0 | 371 } |