Mercurial > hg > truffle
annotate src/share/vm/gc_implementation/parallelScavenge/pcTasks.hpp @ 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 |
|---|---|
| date | Tue, 15 Sep 2009 21:53:47 -0700 |
| parents | ad8c8ca4ab0f |
| children | c18cbe5936b8 |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 470 | 2 * Copyright 2005-2008 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 | |
| 26 // Tasks for parallel compaction of the old generation | |
| 27 // | |
| 28 // Tasks are created and enqueued on a task queue. The | |
| 29 // tasks for parallel old collector for marking objects | |
| 30 // are MarkFromRootsTask and ThreadRootsMarkingTask. | |
| 31 // | |
| 32 // MarkFromRootsTask's are created | |
| 33 // with a root group (e.g., jni_handles) and when the do_it() | |
| 34 // method of a MarkFromRootsTask is executed, it starts marking | |
| 35 // form it's root group. | |
| 36 // | |
| 37 // ThreadRootsMarkingTask's are created for each Java thread. When | |
| 38 // the do_it() method of a ThreadRootsMarkingTask is executed, it | |
| 39 // starts marking from the thread's roots. | |
| 40 // | |
| 41 // The enqueuing of the MarkFromRootsTask and ThreadRootsMarkingTask | |
| 42 // do little more than create the task and put it on a queue. The | |
| 43 // queue is a GCTaskQueue and threads steal tasks from this GCTaskQueue. | |
| 44 // | |
| 45 // In addition to the MarkFromRootsTask and ThreadRootsMarkingTask | |
| 46 // tasks there are StealMarkingTask tasks. The StealMarkingTask's | |
| 47 // steal a reference from the marking stack of another | |
| 48 // thread and transitively marks the object of the reference | |
| 49 // and internal references. After successfully stealing a reference | |
| 50 // and marking it, the StealMarkingTask drains its marking stack | |
| 51 // stack before attempting another steal. | |
| 52 // | |
| 53 // ThreadRootsMarkingTask | |
| 54 // | |
| 55 // This task marks from the roots of a single thread. This task | |
| 56 // enables marking of thread roots in parallel. | |
| 57 // | |
| 58 | |
| 59 class ParallelTaskTerminator; | |
| 60 | |
| 61 class ThreadRootsMarkingTask : public GCTask { | |
| 62 private: | |
| 63 JavaThread* _java_thread; | |
| 64 VMThread* _vm_thread; | |
| 65 public: | |
| 66 ThreadRootsMarkingTask(JavaThread* root) : _java_thread(root), _vm_thread(NULL) {} | |
| 67 ThreadRootsMarkingTask(VMThread* root) : _java_thread(NULL), _vm_thread(root) {} | |
| 68 | |
| 69 char* name() { return (char *)"thread-roots-marking-task"; } | |
| 70 | |
| 71 virtual void do_it(GCTaskManager* manager, uint which); | |
| 72 }; | |
| 73 | |
| 74 | |
| 75 // | |
| 76 // MarkFromRootsTask | |
| 77 // | |
| 78 // This task marks from all the roots to all live | |
| 79 // objects. | |
| 80 // | |
| 81 // | |
| 82 | |
| 83 class MarkFromRootsTask : public GCTask { | |
| 84 public: | |
| 85 enum RootType { | |
| 86 universe = 1, | |
| 87 jni_handles = 2, | |
| 88 threads = 3, | |
| 89 object_synchronizer = 4, | |
| 90 flat_profiler = 5, | |
| 91 management = 6, | |
| 92 jvmti = 7, | |
| 93 system_dictionary = 8, | |
| 94 vm_symbols = 9, | |
|
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95 reference_processing = 10, |
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96 code_cache = 11 |
| 0 | 97 }; |
| 98 private: | |
| 99 RootType _root_type; | |
| 100 public: | |
| 101 MarkFromRootsTask(RootType value) : _root_type(value) {} | |
| 102 | |
| 103 char* name() { return (char *)"mark-from-roots-task"; } | |
| 104 | |
| 105 virtual void do_it(GCTaskManager* manager, uint which); | |
| 106 }; | |
| 107 | |
| 108 // | |
| 109 // RefProcTaskProxy | |
| 110 // | |
| 111 // This task is used as a proxy to parallel reference processing tasks . | |
| 112 // | |
| 113 | |
| 114 class RefProcTaskProxy : public GCTask { | |
| 115 typedef AbstractRefProcTaskExecutor::ProcessTask ProcessTask; | |
| 116 ProcessTask & _rp_task; | |
| 117 uint _work_id; | |
| 118 public: | |
| 119 RefProcTaskProxy(ProcessTask & rp_task, uint work_id) | |
| 120 : _rp_task(rp_task), | |
| 121 _work_id(work_id) | |
| 122 { } | |
| 123 | |
| 124 private: | |
| 125 virtual char* name() { return (char *)"Process referents by policy in parallel"; } | |
| 126 | |
| 127 virtual void do_it(GCTaskManager* manager, uint which); | |
| 128 }; | |
| 129 | |
| 130 | |
| 131 | |
| 132 // | |
| 133 // RefEnqueueTaskProxy | |
| 134 // | |
| 135 // This task is used as a proxy to parallel reference processing tasks . | |
| 136 // | |
| 137 | |
| 138 class RefEnqueueTaskProxy: public GCTask { | |
| 139 typedef AbstractRefProcTaskExecutor::EnqueueTask EnqueueTask; | |
| 140 EnqueueTask& _enq_task; | |
| 141 uint _work_id; | |
| 142 | |
| 143 public: | |
| 144 RefEnqueueTaskProxy(EnqueueTask& enq_task, uint work_id) | |
| 145 : _enq_task(enq_task), | |
| 146 _work_id(work_id) | |
| 147 { } | |
| 148 | |
| 149 virtual char* name() { return (char *)"Enqueue reference objects in parallel"; } | |
| 150 virtual void do_it(GCTaskManager* manager, uint which) | |
| 151 { | |
| 152 _enq_task.work(_work_id); | |
| 153 } | |
| 154 }; | |
| 155 | |
| 156 | |
| 157 // | |
| 158 // RefProcTaskExecutor | |
| 159 // | |
| 160 // Task executor is an interface for the reference processor to run | |
| 161 // tasks using GCTaskManager. | |
| 162 // | |
| 163 | |
| 164 class RefProcTaskExecutor: public AbstractRefProcTaskExecutor { | |
| 165 virtual void execute(ProcessTask& task); | |
| 166 virtual void execute(EnqueueTask& task); | |
| 167 }; | |
| 168 | |
| 169 | |
| 170 // | |
| 171 // StealMarkingTask | |
| 172 // | |
| 173 // This task is used to distribute work to idle threads. | |
| 174 // | |
| 175 | |
| 176 class StealMarkingTask : public GCTask { | |
| 177 private: | |
| 178 ParallelTaskTerminator* const _terminator; | |
| 179 private: | |
| 180 | |
| 181 public: | |
| 182 char* name() { return (char *)"steal-marking-task"; } | |
| 183 | |
| 184 StealMarkingTask(ParallelTaskTerminator* t); | |
| 185 | |
| 186 ParallelTaskTerminator* terminator() { return _terminator; } | |
| 187 | |
| 188 virtual void do_it(GCTaskManager* manager, uint which); | |
| 189 }; | |
| 190 | |
| 191 // | |
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192 // StealRegionCompactionTask |
| 0 | 193 // |
| 194 // This task is used to distribute work to idle threads. | |
| 195 // | |
| 196 | |
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197 class StealRegionCompactionTask : public GCTask { |
| 0 | 198 private: |
| 199 ParallelTaskTerminator* const _terminator; | |
| 200 public: | |
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201 StealRegionCompactionTask(ParallelTaskTerminator* t); |
| 0 | 202 |
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203 char* name() { return (char *)"steal-region-task"; } |
| 0 | 204 ParallelTaskTerminator* terminator() { return _terminator; } |
| 205 | |
| 206 virtual void do_it(GCTaskManager* manager, uint which); | |
| 207 }; | |
| 208 | |
| 209 // | |
| 210 // UpdateDensePrefixTask | |
| 211 // | |
| 212 // This task is used to update the dense prefix | |
| 213 // of a space. | |
| 214 // | |
| 215 | |
| 216 class UpdateDensePrefixTask : public GCTask { | |
| 217 private: | |
| 218 PSParallelCompact::SpaceId _space_id; | |
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219 size_t _region_index_start; |
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220 size_t _region_index_end; |
| 0 | 221 |
| 222 public: | |
| 223 char* name() { return (char *)"update-dense_prefix-task"; } | |
| 224 | |
| 225 UpdateDensePrefixTask(PSParallelCompact::SpaceId space_id, | |
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226 size_t region_index_start, |
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227 size_t region_index_end); |
| 0 | 228 |
| 229 virtual void do_it(GCTaskManager* manager, uint which); | |
| 230 }; | |
| 231 | |
| 232 // | |
| 233 // DrainStacksCompactionTask | |
| 234 // | |
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235 // This task processes regions that have been added to the stacks of each |
| 0 | 236 // compaction manager. |
| 237 // | |
| 238 // Trying to use one draining thread does not work because there are no | |
| 239 // guarantees about which task will be picked up by which thread. For example, | |
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240 // if thread A gets all the preloaded regions, thread A may not get a draining |
| 0 | 241 // task (they may all be done by other threads). |
| 242 // | |
| 243 | |
| 244 class DrainStacksCompactionTask : public GCTask { | |
| 245 public: | |
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246 char* name() { return (char *)"drain-region-task"; } |
| 0 | 247 virtual void do_it(GCTaskManager* manager, uint which); |
| 248 }; |