37 class G1CMBitMap;
38 class G1ParScanThreadState;
39 class G1CMTask;
40 class ReferenceProcessor;
41
42 class G1ScanClosureBase : public BasicOopIterateClosure {
43 protected:
44 G1CollectedHeap* _g1h;
45 G1ParScanThreadState* _par_scan_state;
46 HeapRegion* _from;
47
48 G1ScanClosureBase(G1CollectedHeap* g1h, G1ParScanThreadState* par_scan_state);
49 ~G1ScanClosureBase() { }
50
51 template <class T>
52 inline void prefetch_and_push(T* p, oop const obj);
53
54 template <class T>
55 inline void handle_non_cset_obj_common(InCSetState const state, T* p, oop const obj);
56 public:
57 // This closure needs special handling for InstanceRefKlass.
58 virtual ReferenceIterationMode reference_iteration_mode() { return DO_DISCOVERED_AND_DISCOVERY; }
59 void set_region(HeapRegion* from) { _from = from; }
60
61 inline void trim_queue_partially();
62 };
63
64 // Used during the Update RS phase to refine remaining cards in the DCQ during garbage collection.
65 class G1ScanObjsDuringUpdateRSClosure: public G1ScanClosureBase {
66 uint _worker_i;
67
68 public:
69 G1ScanObjsDuringUpdateRSClosure(G1CollectedHeap* g1h,
70 G1ParScanThreadState* pss,
71 uint worker_i) :
72 G1ScanClosureBase(g1h, pss), _worker_i(worker_i) { }
73
74 template <class T> void do_oop_work(T* p);
75 virtual void do_oop(narrowOop* p) { do_oop_work(p); }
76 virtual void do_oop(oop* p) { do_oop_work(p); }
77 };
78
81 public:
82 G1ScanObjsDuringScanRSClosure(G1CollectedHeap* g1h,
83 G1ParScanThreadState* par_scan_state):
84 G1ScanClosureBase(g1h, par_scan_state) { }
85
86 template <class T> void do_oop_work(T* p);
87 virtual void do_oop(oop* p) { do_oop_work(p); }
88 virtual void do_oop(narrowOop* p) { do_oop_work(p); }
89 };
90
91 // This closure is applied to the fields of the objects that have just been copied during evacuation.
92 class G1ScanEvacuatedObjClosure : public G1ScanClosureBase {
93 public:
94 G1ScanEvacuatedObjClosure(G1CollectedHeap* g1h, G1ParScanThreadState* par_scan_state) :
95 G1ScanClosureBase(g1h, par_scan_state) { }
96
97 template <class T> void do_oop_work(T* p);
98 virtual void do_oop(oop* p) { do_oop_work(p); }
99 virtual void do_oop(narrowOop* p) { do_oop_work(p); }
100
101 void set_ref_discoverer(ReferenceDiscoverer* rd) {
102 set_ref_discoverer_internal(rd);
103 }
104 };
105
106 // Add back base class for metadata
107 class G1ParCopyHelper : public OopClosure {
108 protected:
109 G1CollectedHeap* _g1h;
110 G1ParScanThreadState* _par_scan_state;
111 uint _worker_id; // Cache value from par_scan_state.
112 ClassLoaderData* _scanned_cld;
113 G1ConcurrentMark* _cm;
114
115 // Mark the object if it's not already marked. This is used to mark
116 // objects pointed to by roots that are guaranteed not to move
117 // during the GC (i.e., non-CSet objects). It is MT-safe.
118 inline void mark_object(oop obj);
119
120 // Mark the object if it's not already marked. This is used to mark
184 G1ConcurrentMark* _cm;
185 uint _worker_id;
186 public:
187 G1RootRegionScanClosure(G1CollectedHeap* g1h, G1ConcurrentMark* cm, uint worker_id) :
188 _g1h(g1h), _cm(cm), _worker_id(worker_id) { }
189 template <class T> void do_oop_work(T* p);
190 virtual void do_oop( oop* p) { do_oop_work(p); }
191 virtual void do_oop(narrowOop* p) { do_oop_work(p); }
192 };
193
194 class G1ConcurrentRefineOopClosure: public BasicOopIterateClosure {
195 G1CollectedHeap* _g1h;
196 uint _worker_i;
197
198 public:
199 G1ConcurrentRefineOopClosure(G1CollectedHeap* g1h, uint worker_i) :
200 _g1h(g1h),
201 _worker_i(worker_i) {
202 }
203
204 // This closure needs special handling for InstanceRefKlass.
205 virtual ReferenceIterationMode reference_iteration_mode() { return DO_DISCOVERED_AND_DISCOVERY; }
206
207 template <class T> void do_oop_work(T* p);
208 virtual void do_oop(narrowOop* p) { do_oop_work(p); }
209 virtual void do_oop(oop* p) { do_oop_work(p); }
210 };
211
212 class G1RebuildRemSetClosure : public BasicOopIterateClosure {
213 G1CollectedHeap* _g1h;
214 uint _worker_id;
215 public:
216 G1RebuildRemSetClosure(G1CollectedHeap* g1h, uint worker_id) : _g1h(g1h), _worker_id(worker_id) {
217 }
218
219 template <class T> void do_oop_work(T* p);
220 virtual void do_oop(oop* p) { do_oop_work(p); }
221 virtual void do_oop(narrowOop* p) { do_oop_work(p); }
222 // This closure needs special handling for InstanceRefKlass.
223 virtual ReferenceIterationMode reference_iteration_mode() { return DO_DISCOVERED_AND_DISCOVERY; }
224 };
225
226 #endif // SHARE_VM_GC_G1_G1OOPCLOSURES_HPP
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37 class G1CMBitMap;
38 class G1ParScanThreadState;
39 class G1CMTask;
40 class ReferenceProcessor;
41
42 class G1ScanClosureBase : public BasicOopIterateClosure {
43 protected:
44 G1CollectedHeap* _g1h;
45 G1ParScanThreadState* _par_scan_state;
46 HeapRegion* _from;
47
48 G1ScanClosureBase(G1CollectedHeap* g1h, G1ParScanThreadState* par_scan_state);
49 ~G1ScanClosureBase() { }
50
51 template <class T>
52 inline void prefetch_and_push(T* p, oop const obj);
53
54 template <class T>
55 inline void handle_non_cset_obj_common(InCSetState const state, T* p, oop const obj);
56 public:
57 virtual ReferenceIterationMode reference_iteration_mode() { return DO_FIELDS; }
58
59 void set_region(HeapRegion* from) { _from = from; }
60
61 inline void trim_queue_partially();
62 };
63
64 // Used during the Update RS phase to refine remaining cards in the DCQ during garbage collection.
65 class G1ScanObjsDuringUpdateRSClosure: public G1ScanClosureBase {
66 uint _worker_i;
67
68 public:
69 G1ScanObjsDuringUpdateRSClosure(G1CollectedHeap* g1h,
70 G1ParScanThreadState* pss,
71 uint worker_i) :
72 G1ScanClosureBase(g1h, pss), _worker_i(worker_i) { }
73
74 template <class T> void do_oop_work(T* p);
75 virtual void do_oop(narrowOop* p) { do_oop_work(p); }
76 virtual void do_oop(oop* p) { do_oop_work(p); }
77 };
78
81 public:
82 G1ScanObjsDuringScanRSClosure(G1CollectedHeap* g1h,
83 G1ParScanThreadState* par_scan_state):
84 G1ScanClosureBase(g1h, par_scan_state) { }
85
86 template <class T> void do_oop_work(T* p);
87 virtual void do_oop(oop* p) { do_oop_work(p); }
88 virtual void do_oop(narrowOop* p) { do_oop_work(p); }
89 };
90
91 // This closure is applied to the fields of the objects that have just been copied during evacuation.
92 class G1ScanEvacuatedObjClosure : public G1ScanClosureBase {
93 public:
94 G1ScanEvacuatedObjClosure(G1CollectedHeap* g1h, G1ParScanThreadState* par_scan_state) :
95 G1ScanClosureBase(g1h, par_scan_state) { }
96
97 template <class T> void do_oop_work(T* p);
98 virtual void do_oop(oop* p) { do_oop_work(p); }
99 virtual void do_oop(narrowOop* p) { do_oop_work(p); }
100
101 // We need to do reference discovery while processing evacuated objects.
102 virtual ReferenceIterationMode reference_iteration_mode() { return DO_DISCOVERED_AND_DISCOVERY; }
103
104 void set_ref_discoverer(ReferenceDiscoverer* rd) {
105 set_ref_discoverer_internal(rd);
106 }
107 };
108
109 // Add back base class for metadata
110 class G1ParCopyHelper : public OopClosure {
111 protected:
112 G1CollectedHeap* _g1h;
113 G1ParScanThreadState* _par_scan_state;
114 uint _worker_id; // Cache value from par_scan_state.
115 ClassLoaderData* _scanned_cld;
116 G1ConcurrentMark* _cm;
117
118 // Mark the object if it's not already marked. This is used to mark
119 // objects pointed to by roots that are guaranteed not to move
120 // during the GC (i.e., non-CSet objects). It is MT-safe.
121 inline void mark_object(oop obj);
122
123 // Mark the object if it's not already marked. This is used to mark
187 G1ConcurrentMark* _cm;
188 uint _worker_id;
189 public:
190 G1RootRegionScanClosure(G1CollectedHeap* g1h, G1ConcurrentMark* cm, uint worker_id) :
191 _g1h(g1h), _cm(cm), _worker_id(worker_id) { }
192 template <class T> void do_oop_work(T* p);
193 virtual void do_oop( oop* p) { do_oop_work(p); }
194 virtual void do_oop(narrowOop* p) { do_oop_work(p); }
195 };
196
197 class G1ConcurrentRefineOopClosure: public BasicOopIterateClosure {
198 G1CollectedHeap* _g1h;
199 uint _worker_i;
200
201 public:
202 G1ConcurrentRefineOopClosure(G1CollectedHeap* g1h, uint worker_i) :
203 _g1h(g1h),
204 _worker_i(worker_i) {
205 }
206
207 virtual ReferenceIterationMode reference_iteration_mode() { return DO_FIELDS; }
208
209 template <class T> void do_oop_work(T* p);
210 virtual void do_oop(narrowOop* p) { do_oop_work(p); }
211 virtual void do_oop(oop* p) { do_oop_work(p); }
212 };
213
214 class G1RebuildRemSetClosure : public BasicOopIterateClosure {
215 G1CollectedHeap* _g1h;
216 uint _worker_id;
217 public:
218 G1RebuildRemSetClosure(G1CollectedHeap* g1h, uint worker_id) : _g1h(g1h), _worker_id(worker_id) {
219 }
220
221 template <class T> void do_oop_work(T* p);
222 virtual void do_oop(oop* p) { do_oop_work(p); }
223 virtual void do_oop(narrowOop* p) { do_oop_work(p); }
224
225 virtual ReferenceIterationMode reference_iteration_mode() { return DO_FIELDS; }
226 };
227
228 #endif // SHARE_VM_GC_G1_G1OOPCLOSURES_HPP
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