161 err_msg("Attempt to access p = "PTR_FORMAT" out of bounds of "
162 " card marking array's _whole_heap = ["PTR_FORMAT","PTR_FORMAT")",
163 p2i(p), p2i(_whole_heap.start()), p2i(_whole_heap.end())));
164 jbyte* result = &byte_map_base[uintptr_t(p) >> card_shift];
165 assert(result >= _byte_map && result < _byte_map + _byte_map_size,
166 "out of bounds accessor for card marking array");
167 return result;
168 }
169
170 // The card table byte one after the card marking array
171 // entry for argument address. Typically used for higher bounds
172 // for loops iterating through the card table.
173 jbyte* byte_after(const void* p) const {
174 return byte_for(p) + 1;
175 }
176
177 // Iterate over the portion of the card-table which covers the given
178 // region mr in the given space and apply cl to any dirty sub-regions
179 // of mr. Clears the dirty cards as they are processed.
180 void non_clean_card_iterate_possibly_parallel(Space* sp, MemRegion mr,
181 OopsInGenClosure* cl, CardTableRS* ct);
182
183 private:
184 // Work method used to implement non_clean_card_iterate_possibly_parallel()
185 // above in the parallel case.
186 void non_clean_card_iterate_parallel_work(Space* sp, MemRegion mr,
187 OopsInGenClosure* cl, CardTableRS* ct,
188 int n_threads);
189
190 protected:
191 // Dirty the bytes corresponding to "mr" (not all of which must be
192 // covered.)
193 void dirty_MemRegion(MemRegion mr);
194
195 // Clear (to clean_card) the bytes entirely contained within "mr" (not
196 // all of which must be covered.)
197 void clear_MemRegion(MemRegion mr);
198
199 // *** Support for parallel card scanning.
200
201 // This is an array, one element per covered region of the card table.
202 // Each entry is itself an array, with one element per chunk in the
203 // covered region. Each entry of these arrays is the lowest non-clean
204 // card of the corresponding chunk containing part of an object from the
205 // previous chunk, or else NULL.
206 typedef jbyte* CardPtr;
207 typedef CardPtr* CardArr;
208 CardArr* _lowest_non_clean;
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161 err_msg("Attempt to access p = "PTR_FORMAT" out of bounds of "
162 " card marking array's _whole_heap = ["PTR_FORMAT","PTR_FORMAT")",
163 p2i(p), p2i(_whole_heap.start()), p2i(_whole_heap.end())));
164 jbyte* result = &byte_map_base[uintptr_t(p) >> card_shift];
165 assert(result >= _byte_map && result < _byte_map + _byte_map_size,
166 "out of bounds accessor for card marking array");
167 return result;
168 }
169
170 // The card table byte one after the card marking array
171 // entry for argument address. Typically used for higher bounds
172 // for loops iterating through the card table.
173 jbyte* byte_after(const void* p) const {
174 return byte_for(p) + 1;
175 }
176
177 // Iterate over the portion of the card-table which covers the given
178 // region mr in the given space and apply cl to any dirty sub-regions
179 // of mr. Clears the dirty cards as they are processed.
180 void non_clean_card_iterate_possibly_parallel(Space* sp, MemRegion mr,
181 OopsInGenClosure* cl, CardTableRS* ct,
182 uint n_threads);
183
184 private:
185 // Work method used to implement non_clean_card_iterate_possibly_parallel()
186 // above in the parallel case.
187 void non_clean_card_iterate_parallel_work(Space* sp, MemRegion mr,
188 OopsInGenClosure* cl, CardTableRS* ct,
189 uint n_threads);
190
191 protected:
192 // Dirty the bytes corresponding to "mr" (not all of which must be
193 // covered.)
194 void dirty_MemRegion(MemRegion mr);
195
196 // Clear (to clean_card) the bytes entirely contained within "mr" (not
197 // all of which must be covered.)
198 void clear_MemRegion(MemRegion mr);
199
200 // *** Support for parallel card scanning.
201
202 // This is an array, one element per covered region of the card table.
203 // Each entry is itself an array, with one element per chunk in the
204 // covered region. Each entry of these arrays is the lowest non-clean
205 // card of the corresponding chunk containing part of an object from the
206 // previous chunk, or else NULL.
207 typedef jbyte* CardPtr;
208 typedef CardPtr* CardArr;
209 CardArr* _lowest_non_clean;
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