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comparison src/share/vm/memory/referenceProcessor.hpp @ 14521:29ccc4cbabca

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Merge
author Gilles Duboscq <duboscq@ssw.jku.at>
date Wed, 12 Mar 2014 13:30:08 +0100
parents d8041d695d19
children 4ca6dc0799b6
comparison
equal deleted inserted replaced
14520:f84115370178 14521:29ccc4cbabca
97 oop _next; 97 oop _next;
98 HeapWord* _referent_addr; 98 HeapWord* _referent_addr;
99 oop _referent; 99 oop _referent;
100 OopClosure* _keep_alive; 100 OopClosure* _keep_alive;
101 BoolObjectClosure* _is_alive; 101 BoolObjectClosure* _is_alive;
102 bool _discovered_list_needs_post_barrier;
102 103
103 DEBUG_ONLY( 104 DEBUG_ONLY(
104 oop _first_seen; // cyclic linked list check 105 oop _first_seen; // cyclic linked list check
105 ) 106 )
106 107
110 ) 111 )
111 112
112 public: 113 public:
113 inline DiscoveredListIterator(DiscoveredList& refs_list, 114 inline DiscoveredListIterator(DiscoveredList& refs_list,
114 OopClosure* keep_alive, 115 OopClosure* keep_alive,
115 BoolObjectClosure* is_alive): 116 BoolObjectClosure* is_alive,
117 bool discovered_list_needs_post_barrier = false):
116 _refs_list(refs_list), 118 _refs_list(refs_list),
117 _prev_next(refs_list.adr_head()), 119 _prev_next(refs_list.adr_head()),
118 _prev(NULL), 120 _prev(NULL),
119 _ref(refs_list.head()), 121 _ref(refs_list.head()),
120 #ifdef ASSERT 122 #ifdef ASSERT
124 _processed(0), 126 _processed(0),
125 _removed(0), 127 _removed(0),
126 #endif 128 #endif
127 _next(NULL), 129 _next(NULL),
128 _keep_alive(keep_alive), 130 _keep_alive(keep_alive),
129 _is_alive(is_alive) 131 _is_alive(is_alive),
132 _discovered_list_needs_post_barrier(discovered_list_needs_post_barrier)
130 { } 133 { }
131 134
132 // End Of List. 135 // End Of List.
133 inline bool has_next() const { return _ref != NULL; } 136 inline bool has_next() const { return _ref != NULL; }
134 137
226 bool _discovery_is_atomic; // if discovery is atomic wrt 229 bool _discovery_is_atomic; // if discovery is atomic wrt
227 // other collectors in configuration 230 // other collectors in configuration
228 bool _discovery_is_mt; // true if reference discovery is MT. 231 bool _discovery_is_mt; // true if reference discovery is MT.
229 232
230 // If true, setting "next" field of a discovered refs list requires 233 // If true, setting "next" field of a discovered refs list requires
231 // write barrier(s). (Must be true if used in a collector in which 234 // write post barrier. (Must be true if used in a collector in which
232 // elements of a discovered list may be moved during discovery: for 235 // elements of a discovered list may be moved during discovery: for
233 // example, a collector like Garbage-First that moves objects during a 236 // example, a collector like Garbage-First that moves objects during a
234 // long-term concurrent marking phase that does weak reference 237 // long-term concurrent marking phase that does weak reference
235 // discovery.) 238 // discovery.)
236 bool _discovered_list_needs_barrier; 239 bool _discovered_list_needs_post_barrier;
237 240
238 BarrierSet* _bs; // Cached copy of BarrierSet.
239 bool _enqueuing_is_done; // true if all weak references enqueued 241 bool _enqueuing_is_done; // true if all weak references enqueued
240 bool _processing_is_mt; // true during phases when 242 bool _processing_is_mt; // true during phases when
241 // reference processing is MT. 243 // reference processing is MT.
242 uint _next_id; // round-robin mod _num_q counter in 244 uint _next_id; // round-robin mod _num_q counter in
243 // support of work distribution 245 // support of work distribution
379 381
380 void enqueue_discovered_reflists(HeapWord* pending_list_addr, AbstractRefProcTaskExecutor* task_executor); 382 void enqueue_discovered_reflists(HeapWord* pending_list_addr, AbstractRefProcTaskExecutor* task_executor);
381 383
382 protected: 384 protected:
383 // Set the 'discovered' field of the given reference to 385 // Set the 'discovered' field of the given reference to
384 // the given value - emitting barriers depending upon 386 // the given value - emitting post barriers depending upon
385 // the value of _discovered_list_needs_barrier. 387 // the value of _discovered_list_needs_post_barrier.
386 void set_discovered(oop ref, oop value); 388 void set_discovered(oop ref, oop value);
387 389
388 // "Preclean" the given discovered reference list 390 // "Preclean" the given discovered reference list
389 // by removing references with strongly reachable referents. 391 // by removing references with strongly reachable referents.
390 // Currently used in support of CMS only. 392 // Currently used in support of CMS only.
418 420
419 // Update (advance) the soft ref master clock field. 421 // Update (advance) the soft ref master clock field.
420 void update_soft_ref_master_clock(); 422 void update_soft_ref_master_clock();
421 423
422 public: 424 public:
423 // constructor
424 ReferenceProcessor():
425 _span((HeapWord*)NULL, (HeapWord*)NULL),
426 _discovered_refs(NULL),
427 _discoveredSoftRefs(NULL), _discoveredWeakRefs(NULL),
428 _discoveredFinalRefs(NULL), _discoveredPhantomRefs(NULL),
429 _discovering_refs(false),
430 _discovery_is_atomic(true),
431 _enqueuing_is_done(false),
432 _discovery_is_mt(false),
433 _discovered_list_needs_barrier(false),
434 _bs(NULL),
435 _is_alive_non_header(NULL),
436 _num_q(0),
437 _max_num_q(0),
438 _processing_is_mt(false),
439 _next_id(0)
440 { }
441
442 // Default parameters give you a vanilla reference processor. 425 // Default parameters give you a vanilla reference processor.
443 ReferenceProcessor(MemRegion span, 426 ReferenceProcessor(MemRegion span,
444 bool mt_processing = false, uint mt_processing_degree = 1, 427 bool mt_processing = false, uint mt_processing_degree = 1,
445 bool mt_discovery = false, uint mt_discovery_degree = 1, 428 bool mt_discovery = false, uint mt_discovery_degree = 1,
446 bool atomic_discovery = true, 429 bool atomic_discovery = true,
447 BoolObjectClosure* is_alive_non_header = NULL, 430 BoolObjectClosure* is_alive_non_header = NULL,
448 bool discovered_list_needs_barrier = false); 431 bool discovered_list_needs_post_barrier = false);
449 432
450 // RefDiscoveryPolicy values 433 // RefDiscoveryPolicy values
451 enum DiscoveryPolicy { 434 enum DiscoveryPolicy {
452 ReferenceBasedDiscovery = 0, 435 ReferenceBasedDiscovery = 0,
453 ReferentBasedDiscovery = 1, 436 ReferentBasedDiscovery = 1,
492 475
493 // Whether we are in a phase when _processing_ is MT. 476 // Whether we are in a phase when _processing_ is MT.
494 bool processing_is_mt() const { return _processing_is_mt; } 477 bool processing_is_mt() const { return _processing_is_mt; }
495 void set_mt_processing(bool mt) { _processing_is_mt = mt; } 478 void set_mt_processing(bool mt) { _processing_is_mt = mt; }
496 479
497 // whether all enqueuing of weak references is complete 480 // whether all enqueueing of weak references is complete
498 bool enqueuing_is_done() { return _enqueuing_is_done; } 481 bool enqueuing_is_done() { return _enqueuing_is_done; }
499 void set_enqueuing_is_done(bool v) { _enqueuing_is_done = v; } 482 void set_enqueuing_is_done(bool v) { _enqueuing_is_done = v; }
500 483
501 // iterate over oops 484 // iterate over oops
502 void weak_oops_do(OopClosure* f); // weak roots 485 void weak_oops_do(OopClosure* f); // weak roots