Mercurial > hg > graal-compiler
annotate src/share/vm/gc_implementation/parallelScavenge/psCompactionManager.hpp @ 375:81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
Reviewed-by: iveresov, tonyp
| author | jcoomes |
|---|---|
| date | Tue, 30 Sep 2008 12:20:22 -0700 |
| parents | a61af66fc99e |
| children | ad8c8ca4ab0f |
| rev | line source |
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| 0 | 1 /* |
| 2 * Copyright 2005-2007 Sun Microsystems, Inc. All Rights Reserved. | |
| 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 // psPromotionManager is used by a single thread to manage object survival | |
| 27 // during a scavenge. The promotion manager contains thread local data only. | |
| 28 // | |
| 29 // NOTE! Be carefull when allocating the stacks on cheap. If you are going | |
| 30 // to use a promotion manager in more than one thread, the stacks MUST be | |
| 31 // on cheap. This can lead to memory leaks, though, as they are not auto | |
| 32 // deallocated. | |
| 33 // | |
| 34 // FIX ME FIX ME Add a destructor, and don't rely on the user to drain/flush/deallocate! | |
| 35 // | |
| 36 | |
| 37 // Move to some global location | |
| 38 #define HAS_BEEN_MOVED 0x1501d01d | |
| 39 // End move to some global location | |
| 40 | |
| 41 | |
| 42 class MutableSpace; | |
| 43 class PSOldGen; | |
| 44 class ParCompactionManager; | |
| 45 class ObjectStartArray; | |
| 46 class ParallelCompactData; | |
| 47 class ParMarkBitMap; | |
| 48 | |
| 49 // Move to it's own file if this works out. | |
| 50 | |
| 51 class ParCompactionManager : public CHeapObj { | |
| 52 friend class ParallelTaskTerminator; | |
| 53 friend class ParMarkBitMap; | |
| 54 friend class PSParallelCompact; | |
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55 friend class StealRegionCompactionTask; |
| 0 | 56 friend class UpdateAndFillClosure; |
| 57 friend class RefProcTaskExecutor; | |
| 58 | |
| 59 public: | |
| 60 | |
| 61 // ------------------------ Don't putback if not needed | |
| 62 // Actions that the compaction manager should take. | |
| 63 enum Action { | |
| 64 Update, | |
| 65 Copy, | |
| 66 UpdateAndCopy, | |
| 67 CopyAndUpdate, | |
| 68 VerifyUpdate, | |
| 69 ResetObjects, | |
| 70 NotValid | |
| 71 }; | |
| 72 // ------------------------ End don't putback if not needed | |
| 73 | |
| 74 private: | |
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75 static ParCompactionManager** _manager_array; |
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76 static OopTaskQueueSet* _stack_array; |
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77 static ObjectStartArray* _start_array; |
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78 static RegionTaskQueueSet* _region_array; |
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79 static PSOldGen* _old_gen; |
| 0 | 80 |
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81 OopTaskQueue _marking_stack; |
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82 GrowableArray<oop>* _overflow_stack; |
| 0 | 83 // Is there a way to reuse the _marking_stack for the |
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84 // saving empty regions? For now just create a different |
| 0 | 85 // type of TaskQueue. |
| 86 | |
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87 #ifdef USE_RegionTaskQueueWithOverflow |
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88 RegionTaskQueueWithOverflow _region_stack; |
| 0 | 89 #else |
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90 RegionTaskQueue _region_stack; |
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91 GrowableArray<size_t>* _region_overflow_stack; |
| 0 | 92 #endif |
| 93 | |
| 94 #if 1 // does this happen enough to need a per thread stack? | |
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95 GrowableArray<Klass*>* _revisit_klass_stack; |
| 0 | 96 #endif |
| 97 static ParMarkBitMap* _mark_bitmap; | |
| 98 | |
| 99 Action _action; | |
| 100 | |
| 101 static PSOldGen* old_gen() { return _old_gen; } | |
| 102 static ObjectStartArray* start_array() { return _start_array; } | |
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103 static OopTaskQueueSet* stack_array() { return _stack_array; } |
| 0 | 104 |
| 105 static void initialize(ParMarkBitMap* mbm); | |
| 106 | |
| 107 protected: | |
| 108 // Array of tasks. Needed by the ParallelTaskTerminator. | |
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109 static RegionTaskQueueSet* region_array() { return _region_array; } |
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110 OopTaskQueue* marking_stack() { return &_marking_stack; } |
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111 GrowableArray<oop>* overflow_stack() { return _overflow_stack; } |
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112 #ifdef USE_RegionTaskQueueWithOverflow |
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113 RegionTaskQueueWithOverflow* region_stack() { return &_region_stack; } |
| 0 | 114 #else |
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115 RegionTaskQueue* region_stack() { return &_region_stack; } |
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116 GrowableArray<size_t>* region_overflow_stack() { |
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117 return _region_overflow_stack; |
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118 } |
| 0 | 119 #endif |
| 120 | |
| 121 // Pushes onto the marking stack. If the marking stack is full, | |
| 122 // pushes onto the overflow stack. | |
| 123 void stack_push(oop obj); | |
| 124 // Do not implement an equivalent stack_pop. Deal with the | |
| 125 // marking stack and overflow stack directly. | |
| 126 | |
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127 // Pushes onto the region stack. If the region stack is full, |
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128 // pushes onto the region overflow stack. |
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129 void region_stack_push(size_t region_index); |
| 0 | 130 public: |
| 131 | |
| 132 Action action() { return _action; } | |
| 133 void set_action(Action v) { _action = v; } | |
| 134 | |
| 135 inline static ParCompactionManager* manager_array(int index); | |
| 136 | |
| 137 ParCompactionManager(); | |
| 138 ~ParCompactionManager(); | |
| 139 | |
| 140 void allocate_stacks(); | |
| 141 void deallocate_stacks(); | |
| 142 ParMarkBitMap* mark_bitmap() { return _mark_bitmap; } | |
| 143 | |
| 144 // Take actions in preparation for a compaction. | |
| 145 static void reset(); | |
| 146 | |
| 147 // void drain_stacks(); | |
| 148 | |
| 149 bool should_update(); | |
| 150 bool should_copy(); | |
| 151 bool should_verify_only(); | |
| 152 bool should_reset_only(); | |
| 153 | |
| 154 #if 1 | |
| 155 // Probably stays as a growable array | |
| 156 GrowableArray<Klass*>* revisit_klass_stack() { return _revisit_klass_stack; } | |
| 157 #endif | |
| 158 | |
| 159 // Save oop for later processing. Must not fail. | |
| 160 void save_for_scanning(oop m); | |
| 161 // Get a oop for scanning. If returns null, no oop were found. | |
| 162 oop retrieve_for_scanning(); | |
| 163 | |
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164 // Save region for later processing. Must not fail. |
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165 void save_for_processing(size_t region_index); |
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166 // Get a region for processing. If returns null, no region were found. |
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167 bool retrieve_for_processing(size_t& region_index); |
| 0 | 168 |
| 169 // Access function for compaction managers | |
| 170 static ParCompactionManager* gc_thread_compaction_manager(int index); | |
| 171 | |
| 172 static bool steal(int queue_num, int* seed, Task& t) { | |
| 173 return stack_array()->steal(queue_num, seed, t); | |
| 174 } | |
| 175 | |
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176 static bool steal(int queue_num, int* seed, RegionTask& t) { |
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177 return region_array()->steal(queue_num, seed, t); |
| 0 | 178 } |
| 179 | |
| 180 // Process tasks remaining on any stack | |
| 181 void drain_marking_stacks(OopClosure *blk); | |
| 182 | |
| 183 // Process tasks remaining on any stack | |
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184 void drain_region_stacks(); |
| 0 | 185 |
| 186 // Process tasks remaining on any stack | |
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187 void drain_region_overflow_stack(); |
| 0 | 188 |
| 189 // Debugging support | |
| 190 #ifdef ASSERT | |
| 191 bool stacks_have_been_allocated(); | |
| 192 #endif | |
| 193 }; | |
| 194 | |
| 195 inline ParCompactionManager* ParCompactionManager::manager_array(int index) { | |
| 196 assert(_manager_array != NULL, "access of NULL manager_array"); | |
| 197 assert(index >= 0 && index <= (int)ParallelGCThreads, | |
| 198 "out of range manager_array access"); | |
| 199 return _manager_array[index]; | |
| 200 } |