19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #ifndef SHARE_VM_GC_G1_G1REMSET_HPP
26 #define SHARE_VM_GC_G1_G1REMSET_HPP
27
28 #include "gc/g1/dirtyCardQueue.hpp"
29 #include "gc/g1/g1RemSetSummary.hpp"
30 #include "gc/g1/heapRegion.hpp"
31 #include "memory/allocation.hpp"
32 #include "memory/iterator.hpp"
33
34 // A G1RemSet provides ways of iterating over pointers into a selected
35 // collection set.
36
37 class BitMap;
38 class CardTableModRefBS;
39 class G1BlockOffsetSharedArray;
40 class ConcurrentG1Refine;
41 class CodeBlobClosure;
42 class G1CollectedHeap;
43 class G1CollectorPolicy;
44 class G1ParPushHeapRSClosure;
45 class G1SATBCardTableModRefBS;
46 class HeapRegionClaimer;
47
48 // A G1RemSet in which each heap region has a rem set that records the
49 // external heap references into it. Uses a mod ref bs to track updates,
50 // so that they can be used to update the individual region remsets.
51
52 class G1RemSet: public CHeapObj<mtGC> {
53 private:
54 G1RemSetSummary _prev_period_summary;
55
56 // A DirtyCardQueueSet that is used to hold cards that contain
57 // references into the current collection set. This is used to
58 // update the remembered sets of the regions in the collection
59 // set in the event of an evacuation failure.
154 virtual void print_summary_info();
155
156 // Print accumulated summary info from the last time called.
157 virtual void print_periodic_summary_info(const char* header, uint period_count);
158
159 // Prepare remembered set for verification.
160 virtual void prepare_for_verify();
161
162 size_t conc_refine_cards() const {
163 return _conc_refine_cards;
164 }
165 };
166
167 class ScanRSClosure : public HeapRegionClosure {
168 size_t _cards_done, _cards;
169 G1CollectedHeap* _g1h;
170
171 G1ParPushHeapRSClosure* _oc;
172 CodeBlobClosure* _code_root_cl;
173
174 G1BlockOffsetSharedArray* _bot_shared;
175 G1SATBCardTableModRefBS *_ct_bs;
176
177 double _strong_code_root_scan_time_sec;
178 uint _worker_i;
179 size_t _block_size;
180 bool _try_claimed;
181
182 public:
183 ScanRSClosure(G1ParPushHeapRSClosure* oc,
184 CodeBlobClosure* code_root_cl,
185 uint worker_i);
186
187 bool doHeapRegion(HeapRegion* r);
188
189 double strong_code_root_scan_time_sec() {
190 return _strong_code_root_scan_time_sec;
191 }
192 size_t cards_done() { return _cards_done;}
193 size_t cards_looked_up() { return _cards;}
194 void set_try_claimed() { _try_claimed = true; }
|
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #ifndef SHARE_VM_GC_G1_G1REMSET_HPP
26 #define SHARE_VM_GC_G1_G1REMSET_HPP
27
28 #include "gc/g1/dirtyCardQueue.hpp"
29 #include "gc/g1/g1RemSetSummary.hpp"
30 #include "gc/g1/heapRegion.hpp"
31 #include "memory/allocation.hpp"
32 #include "memory/iterator.hpp"
33
34 // A G1RemSet provides ways of iterating over pointers into a selected
35 // collection set.
36
37 class BitMap;
38 class CardTableModRefBS;
39 class G1BlockOffsetTable;
40 class ConcurrentG1Refine;
41 class CodeBlobClosure;
42 class G1CollectedHeap;
43 class G1CollectorPolicy;
44 class G1ParPushHeapRSClosure;
45 class G1SATBCardTableModRefBS;
46 class HeapRegionClaimer;
47
48 // A G1RemSet in which each heap region has a rem set that records the
49 // external heap references into it. Uses a mod ref bs to track updates,
50 // so that they can be used to update the individual region remsets.
51
52 class G1RemSet: public CHeapObj<mtGC> {
53 private:
54 G1RemSetSummary _prev_period_summary;
55
56 // A DirtyCardQueueSet that is used to hold cards that contain
57 // references into the current collection set. This is used to
58 // update the remembered sets of the regions in the collection
59 // set in the event of an evacuation failure.
154 virtual void print_summary_info();
155
156 // Print accumulated summary info from the last time called.
157 virtual void print_periodic_summary_info(const char* header, uint period_count);
158
159 // Prepare remembered set for verification.
160 virtual void prepare_for_verify();
161
162 size_t conc_refine_cards() const {
163 return _conc_refine_cards;
164 }
165 };
166
167 class ScanRSClosure : public HeapRegionClosure {
168 size_t _cards_done, _cards;
169 G1CollectedHeap* _g1h;
170
171 G1ParPushHeapRSClosure* _oc;
172 CodeBlobClosure* _code_root_cl;
173
174 G1BlockOffsetTable* _bot;
175 G1SATBCardTableModRefBS *_ct_bs;
176
177 double _strong_code_root_scan_time_sec;
178 uint _worker_i;
179 size_t _block_size;
180 bool _try_claimed;
181
182 public:
183 ScanRSClosure(G1ParPushHeapRSClosure* oc,
184 CodeBlobClosure* code_root_cl,
185 uint worker_i);
186
187 bool doHeapRegion(HeapRegion* r);
188
189 double strong_code_root_scan_time_sec() {
190 return _strong_code_root_scan_time_sec;
191 }
192 size_t cards_done() { return _cards_done;}
193 size_t cards_looked_up() { return _cards;}
194 void set_try_claimed() { _try_claimed = true; }
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