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comparison src/share/vm/gc_implementation/parNew/parNewGeneration.hpp @ 1836:894b1d7c7e01

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6423256: GC stacks should use a better data structure 6942771: SEGV in ParScanThreadState::take_from_overflow_stack Reviewed-by: apetrusenko, ysr, pbk
author jcoomes
date Tue, 28 Sep 2010 15:56:15 -0700
parents 8b10f48633dc
children f95d63e2154a
comparison
equal deleted inserted replaced
1835:4805b9f4779e 1836:894b1d7c7e01
50 // The state needed by thread performing parallel young-gen collection. 50 // The state needed by thread performing parallel young-gen collection.
51 class ParScanThreadState { 51 class ParScanThreadState {
52 friend class ParScanThreadStateSet; 52 friend class ParScanThreadStateSet;
53 private: 53 private:
54 ObjToScanQueue *_work_queue; 54 ObjToScanQueue *_work_queue;
55 GrowableArray<oop>* _overflow_stack; 55 Stack<oop>* const _overflow_stack;
56 56
57 ParGCAllocBuffer _to_space_alloc_buffer; 57 ParGCAllocBuffer _to_space_alloc_buffer;
58 58
59 ParScanWithoutBarrierClosure _to_space_closure; // scan_without_gc_barrier 59 ParScanWithoutBarrierClosure _to_space_closure; // scan_without_gc_barrier
60 ParScanWithBarrierClosure _old_gen_closure; // scan_with_gc_barrier 60 ParScanWithBarrierClosure _old_gen_closure; // scan_with_gc_barrier
118 void record_survivor_plab(HeapWord* plab_start, size_t plab_word_size); 118 void record_survivor_plab(HeapWord* plab_start, size_t plab_word_size);
119 119
120 ParScanThreadState(Space* to_space_, ParNewGeneration* gen_, 120 ParScanThreadState(Space* to_space_, ParNewGeneration* gen_,
121 Generation* old_gen_, int thread_num_, 121 Generation* old_gen_, int thread_num_,
122 ObjToScanQueueSet* work_queue_set_, 122 ObjToScanQueueSet* work_queue_set_,
123 GrowableArray<oop>** overflow_stack_set_, 123 Stack<oop>* overflow_stacks_,
124 size_t desired_plab_sz_, 124 size_t desired_plab_sz_,
125 ParallelTaskTerminator& term_); 125 ParallelTaskTerminator& term_);
126 126
127 public: 127 public:
128 ageTable* age_table() {return &_ageTable;} 128 ageTable* age_table() {return &_ageTable;}
142 142
143 // Decrease queue size below "max_size". 143 // Decrease queue size below "max_size".
144 void trim_queues(int max_size); 144 void trim_queues(int max_size);
145 145
146 // Private overflow stack usage 146 // Private overflow stack usage
147 GrowableArray<oop>* overflow_stack() { return _overflow_stack; } 147 Stack<oop>* overflow_stack() { return _overflow_stack; }
148 bool take_from_overflow_stack(); 148 bool take_from_overflow_stack();
149 void push_on_overflow_stack(oop p); 149 void push_on_overflow_stack(oop p);
150 150
151 // Is new_obj a candidate for scan_partial_array_and_push_remainder method. 151 // Is new_obj a candidate for scan_partial_array_and_push_remainder method.
152 inline bool should_be_partially_scanned(oop new_obj, oop old_obj) const; 152 inline bool should_be_partially_scanned(oop new_obj, oop old_obj) const;
299 private: 299 private:
300 // The per-worker-thread work queues 300 // The per-worker-thread work queues
301 ObjToScanQueueSet* _task_queues; 301 ObjToScanQueueSet* _task_queues;
302 302
303 // Per-worker-thread local overflow stacks 303 // Per-worker-thread local overflow stacks
304 GrowableArray<oop>** _overflow_stacks; 304 Stack<oop>* _overflow_stacks;
305 305
306 // Desired size of survivor space plab's 306 // Desired size of survivor space plab's
307 PLABStats _plab_stats; 307 PLABStats _plab_stats;
308 308
309 // A list of from-space images of to-be-scanned objects, threaded through 309 // A list of from-space images of to-be-scanned objects, threaded through