309
310 // Returns the name of the discovered reference list
311 // occupying the i / _num_q slot.
312 const char* list_name(uint i);
313
314 void enqueue_discovered_reflists(HeapWord* pending_list_addr, AbstractRefProcTaskExecutor* task_executor);
315
316 protected:
317 // "Preclean" the given discovered reference list
318 // by removing references with strongly reachable referents.
319 // Currently used in support of CMS only.
320 void preclean_discovered_reflist(DiscoveredList& refs_list,
321 BoolObjectClosure* is_alive,
322 OopClosure* keep_alive,
323 VoidClosure* complete_gc,
324 YieldClosure* yield);
325
326 // round-robin mod _num_q (not: _not_ mode _max_num_q)
327 uint next_id() {
328 uint id = _next_id;
329 if (++_next_id == _num_q) {
330 _next_id = 0;
331 }
332 return id;
333 }
334 DiscoveredList* get_discovered_list(ReferenceType rt);
335 inline void add_to_discovered_list_mt(DiscoveredList& refs_list, oop obj,
336 HeapWord* discovered_addr);
337
338 void clear_discovered_references(DiscoveredList& refs_list);
339
340 // Calculate the number of jni handles.
341 size_t count_jni_refs();
342
343 void log_reflist_counts(DiscoveredList ref_lists[], size_t total_count) PRODUCT_RETURN;
344
345 // Balances reference queues.
346 void balance_queues(DiscoveredList ref_lists[]);
347
348 // Update (advance) the soft ref master clock field.
349 void update_soft_ref_master_clock();
350
351 public:
352 // Default parameters give you a vanilla reference processor.
353 ReferenceProcessor(MemRegion span,
354 bool mt_processing = false, uint mt_processing_degree = 1,
355 bool mt_discovery = false, uint mt_discovery_degree = 1,
356 bool atomic_discovery = true,
357 BoolObjectClosure* is_alive_non_header = NULL);
358
359 // RefDiscoveryPolicy values
360 enum DiscoveryPolicy {
361 ReferenceBasedDiscovery = 0,
362 ReferentBasedDiscovery = 1,
363 DiscoveryPolicyMin = ReferenceBasedDiscovery,
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309
310 // Returns the name of the discovered reference list
311 // occupying the i / _num_q slot.
312 const char* list_name(uint i);
313
314 void enqueue_discovered_reflists(HeapWord* pending_list_addr, AbstractRefProcTaskExecutor* task_executor);
315
316 protected:
317 // "Preclean" the given discovered reference list
318 // by removing references with strongly reachable referents.
319 // Currently used in support of CMS only.
320 void preclean_discovered_reflist(DiscoveredList& refs_list,
321 BoolObjectClosure* is_alive,
322 OopClosure* keep_alive,
323 VoidClosure* complete_gc,
324 YieldClosure* yield);
325
326 // round-robin mod _num_q (not: _not_ mode _max_num_q)
327 uint next_id() {
328 uint id = _next_id;
329 assert(!_discovery_is_mt, "Round robin should only be used in serial discovery");
330 if (++_next_id >= _num_q) {
331 _next_id = 0;
332 }
333 assert(_next_id < _num_q, "_next_id %u _num_q %u _max_num_q %u", _next_id, _num_q, _max_num_q);
334 return id;
335 }
336 DiscoveredList* get_discovered_list(ReferenceType rt);
337 inline void add_to_discovered_list_mt(DiscoveredList& refs_list, oop obj,
338 HeapWord* discovered_addr);
339
340 void clear_discovered_references(DiscoveredList& refs_list);
341
342 // Calculate the number of jni handles.
343 size_t count_jni_refs();
344
345 void log_reflist_counts(DiscoveredList ref_lists[], uint active_length, size_t total_count) PRODUCT_RETURN;
346
347 // Balances reference queues.
348 void balance_queues(DiscoveredList ref_lists[]);
349
350 // Update (advance) the soft ref master clock field.
351 void update_soft_ref_master_clock();
352
353 public:
354 // Default parameters give you a vanilla reference processor.
355 ReferenceProcessor(MemRegion span,
356 bool mt_processing = false, uint mt_processing_degree = 1,
357 bool mt_discovery = false, uint mt_discovery_degree = 1,
358 bool atomic_discovery = true,
359 BoolObjectClosure* is_alive_non_header = NULL);
360
361 // RefDiscoveryPolicy values
362 enum DiscoveryPolicy {
363 ReferenceBasedDiscovery = 0,
364 ReferentBasedDiscovery = 1,
365 DiscoveryPolicyMin = ReferenceBasedDiscovery,
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