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comparison src/share/vm/gc_implementation/g1/g1CollectedHeap.hpp @ 20331:18bf0b66de52

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8044406: JVM crash with JDK8 (build 1.8.0-b132) with G1 GC Summary: Fill the last card that has been allocated into with a dummy object Reviewed-by: tschatzl, mgerdin
author poonam
date Tue, 19 Aug 2014 02:05:49 -0700
parents bfba6779654b
children eec72fa4b108
comparison
equal deleted inserted replaced
20329:fb971e09d20f 20331:18bf0b66de52
181 virtual HeapRegion* allocate_new_region(size_t word_size, bool force); 181 virtual HeapRegion* allocate_new_region(size_t word_size, bool force);
182 virtual void retire_region(HeapRegion* alloc_region, size_t allocated_bytes); 182 virtual void retire_region(HeapRegion* alloc_region, size_t allocated_bytes);
183 public: 183 public:
184 OldGCAllocRegion() 184 OldGCAllocRegion()
185 : G1AllocRegion("Old GC Alloc Region", true /* bot_updates */) { } 185 : G1AllocRegion("Old GC Alloc Region", true /* bot_updates */) { }
186
187 // This specialization of release() makes sure that the last card that has been
188 // allocated into has been completely filled by a dummy object.
189 // This avoids races when remembered set scanning wants to update the BOT of the
190 // last card in the retained old gc alloc region, and allocation threads
191 // allocating into that card at the same time.
192 virtual HeapRegion* release();
186 }; 193 };
187 194
188 // The G1 STW is alive closure. 195 // The G1 STW is alive closure.
189 // An instance is embedded into the G1CH and used as the 196 // An instance is embedded into the G1CH and used as the
190 // (optional) _is_alive_non_header closure in the STW 197 // (optional) _is_alive_non_header closure in the STW