152       if (count < G1ConcRSHotCardLimit) {
 153         _card_counts[card_num] =
 154           (jubyte)(MIN2((uintx)(_card_counts[card_num] + 1), G1ConcRSHotCardLimit));
 155       }
 156     }
 157   }
 158   return count;
 159 }
 160 
 161 bool G1CardCounts::is_hot(uint count) {
 162   return (count >= G1ConcRSHotCardLimit);
 163 }
 164 
 165 void G1CardCounts::clear_region(HeapRegion* hr) {
 166   assert(!hr->isHumongous(), "Should have been cleared");
 167   if (has_count_table()) {
 168     HeapWord* bottom = hr->bottom();
 169 
 170     // We use the last address in hr as hr could be the
 171     // last region in the heap. In which case trying to find
 172     // the card for hr->end() will be an OOB accesss to the
 173     // card table.
 174     HeapWord* last = hr->end() - 1;
 175     assert(_g1h->g1_committed().contains(last),
 176            err_msg("last not in committed: "
 177                    "last: " PTR_FORMAT ", "
 178                    "committed: [" PTR_FORMAT ", " PTR_FORMAT ")",
 179                    last,
 180                    _g1h->g1_committed().start(),
 181                    _g1h->g1_committed().end()));
 182 
 183     const jbyte* from_card_ptr = _ct_bs->byte_for_const(bottom);
 184     const jbyte* last_card_ptr = _ct_bs->byte_for_const(last);
 185 
 186 #ifdef ASSERT
 187     HeapWord* start_addr = _ct_bs->addr_for(from_card_ptr);
 188     assert(start_addr == hr->bottom(), "alignment");
 189     HeapWord* last_addr = _ct_bs->addr_for(last_card_ptr);
 190     assert((last_addr + CardTableModRefBS::card_size_in_words) == hr->end(), "alignment");
 191 #endif // ASSERT
 192 

 152       if (count < G1ConcRSHotCardLimit) {
 153         _card_counts[card_num] =
 154           (jubyte)(MIN2((uintx)(_card_counts[card_num] + 1), G1ConcRSHotCardLimit));
 155       }
 156     }
 157   }
 158   return count;
 159 }
 160 
 161 bool G1CardCounts::is_hot(uint count) {
 162   return (count >= G1ConcRSHotCardLimit);
 163 }
 164 
 165 void G1CardCounts::clear_region(HeapRegion* hr) {
 166   assert(!hr->isHumongous(), "Should have been cleared");
 167   if (has_count_table()) {
 168     HeapWord* bottom = hr->bottom();
 169 
 170     // We use the last address in hr as hr could be the
 171     // last region in the heap. In which case trying to find
 172     // the card for hr->end() will be an OOB access to the
 173     // card table.
 174     HeapWord* last = hr->end() - 1;
 175     assert(_g1h->g1_committed().contains(last),
 176            err_msg("last not in committed: "
 177                    "last: " PTR_FORMAT ", "
 178                    "committed: [" PTR_FORMAT ", " PTR_FORMAT ")",
 179                    last,
 180                    _g1h->g1_committed().start(),
 181                    _g1h->g1_committed().end()));
 182 
 183     const jbyte* from_card_ptr = _ct_bs->byte_for_const(bottom);
 184     const jbyte* last_card_ptr = _ct_bs->byte_for_const(last);
 185 
 186 #ifdef ASSERT
 187     HeapWord* start_addr = _ct_bs->addr_for(from_card_ptr);
 188     assert(start_addr == hr->bottom(), "alignment");
 189     HeapWord* last_addr = _ct_bs->addr_for(last_card_ptr);
 190     assert((last_addr + CardTableModRefBS::card_size_in_words) == hr->end(), "alignment");
 191 #endif // ASSERT
 192