11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
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_G1OOPCLOSURES_HPP
26 #define SHARE_VM_GC_G1_G1OOPCLOSURES_HPP
27
28 #include "gc/g1/g1InCSetState.hpp"
29 #include "memory/iterator.hpp"
30 #include "oops/markOop.hpp"
31 #include "utilities/ticks.hpp"
32
33 class HeapRegion;
34 class G1CollectedHeap;
35 class G1RemSet;
36 class G1ConcurrentMark;
37 class DirtyCardToOopClosure;
38 class G1CMBitMap;
39 class G1ParScanThreadState;
40 class G1CMTask;
41 class ReferenceProcessor;
42
43 class G1ScanClosureBase : public ExtendedOopClosure {
44 protected:
45 G1CollectedHeap* _g1h;
46 G1ParScanThreadState* _par_scan_state;
47 HeapRegion* _from;
48 Tickspan _trim_ticks;
49
50 G1ScanClosureBase(G1CollectedHeap* g1h, G1ParScanThreadState* par_scan_state);
51 ~G1ScanClosureBase() { }
52
53 template <class T>
54 inline void prefetch_and_push(T* p, oop const obj);
55
56 template <class T>
57 inline void handle_non_cset_obj_common(InCSetState const state, T* p, oop const obj);
58 public:
59 // This closure needs special handling for InstanceRefKlass.
60 virtual ReferenceIterationMode reference_iteration_mode() { return DO_DISCOVERED_AND_DISCOVERY; }
61 void set_region(HeapRegion* from) { _from = from; }
62 inline void trim_queue_partially();
63
64 // Returns the currently accumulated time during partial queue triming and resets the counter.
65 Tickspan trim_ticks_and_reset();
66 };
67
68 // Used during the Update RS phase to refine remaining cards in the DCQ during garbage collection.
69 class G1ScanObjsDuringUpdateRSClosure: public G1ScanClosureBase {
70 uint _worker_i;
71
72 public:
73 G1ScanObjsDuringUpdateRSClosure(G1CollectedHeap* g1h,
74 G1ParScanThreadState* pss,
75 uint worker_i) :
76 G1ScanClosureBase(g1h, pss), _worker_i(worker_i) { }
77
78 template <class T> void do_oop_nv(T* p);
79 virtual void do_oop(narrowOop* p) { do_oop_nv(p); }
80 virtual void do_oop(oop* p) { do_oop_nv(p); }
81 };
82
83 // Used during the Scan RS phase to scan cards from the remembered set during garbage collection.
84 class G1ScanObjsDuringScanRSClosure : public G1ScanClosureBase {
85 public:
98 G1ScanEvacuatedObjClosure(G1CollectedHeap* g1h, G1ParScanThreadState* par_scan_state) :
99 G1ScanClosureBase(g1h, par_scan_state) { }
100
101 template <class T> void do_oop_nv(T* p);
102 virtual void do_oop(oop* p) { do_oop_nv(p); }
103 virtual void do_oop(narrowOop* p) { do_oop_nv(p); }
104
105 void set_ref_processor(ReferenceProcessor* rp) {
106 set_ref_processor_internal(rp);
107 }
108 };
109
110 // Add back base class for metadata
111 class G1ParCopyHelper : public OopClosure {
112 protected:
113 G1CollectedHeap* _g1h;
114 G1ParScanThreadState* _par_scan_state;
115 uint _worker_id; // Cache value from par_scan_state.
116 ClassLoaderData* _scanned_cld;
117 G1ConcurrentMark* _cm;
118 Tickspan _trim_ticks;
119
120 // Mark the object if it's not already marked. This is used to mark
121 // objects pointed to by roots that are guaranteed not to move
122 // during the GC (i.e., non-CSet objects). It is MT-safe.
123 inline void mark_object(oop obj);
124
125 // Mark the object if it's not already marked. This is used to mark
126 // objects pointed to by roots that have been forwarded during a
127 // GC. It is MT-safe.
128 inline void mark_forwarded_object(oop from_obj, oop to_obj);
129
130 G1ParCopyHelper(G1CollectedHeap* g1h, G1ParScanThreadState* par_scan_state);
131 ~G1ParCopyHelper() { }
132
133 public:
134 inline void trim_queue_partially();
135 void set_scanned_cld(ClassLoaderData* cld) { _scanned_cld = cld; }
136 inline void do_cld_barrier(oop new_obj);
137
138 // Returns the currently accumulated time during partial queue triming and resets the counter.
139 Tickspan trim_ticks_and_reset();
140 };
141
142 enum G1Barrier {
143 G1BarrierNone,
144 G1BarrierCLD
145 };
146
147 enum G1Mark {
148 G1MarkNone,
149 G1MarkFromRoot,
150 G1MarkPromotedFromRoot
151 };
152
153 template <G1Barrier barrier, G1Mark do_mark_object>
154 class G1ParCopyClosure : public G1ParCopyHelper {
155 public:
156 G1ParCopyClosure(G1CollectedHeap* g1h, G1ParScanThreadState* par_scan_state) :
157 G1ParCopyHelper(g1h, par_scan_state) { }
158
159 template <class T> void do_oop_work(T* p);
|
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
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_G1OOPCLOSURES_HPP
26 #define SHARE_VM_GC_G1_G1OOPCLOSURES_HPP
27
28 #include "gc/g1/g1InCSetState.hpp"
29 #include "memory/iterator.hpp"
30 #include "oops/markOop.hpp"
31
32 class HeapRegion;
33 class G1CollectedHeap;
34 class G1RemSet;
35 class G1ConcurrentMark;
36 class DirtyCardToOopClosure;
37 class G1CMBitMap;
38 class G1ParScanThreadState;
39 class G1CMTask;
40 class ReferenceProcessor;
41
42 class G1ScanClosureBase : public ExtendedOopClosure {
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_nv(T* p);
75 virtual void do_oop(narrowOop* p) { do_oop_nv(p); }
76 virtual void do_oop(oop* p) { do_oop_nv(p); }
77 };
78
79 // Used during the Scan RS phase to scan cards from the remembered set during garbage collection.
80 class G1ScanObjsDuringScanRSClosure : public G1ScanClosureBase {
81 public:
94 G1ScanEvacuatedObjClosure(G1CollectedHeap* g1h, G1ParScanThreadState* par_scan_state) :
95 G1ScanClosureBase(g1h, par_scan_state) { }
96
97 template <class T> void do_oop_nv(T* p);
98 virtual void do_oop(oop* p) { do_oop_nv(p); }
99 virtual void do_oop(narrowOop* p) { do_oop_nv(p); }
100
101 void set_ref_processor(ReferenceProcessor* rp) {
102 set_ref_processor_internal(rp);
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
121 // objects pointed to by roots that have been forwarded during a
122 // GC. It is MT-safe.
123 inline void mark_forwarded_object(oop from_obj, oop to_obj);
124
125 G1ParCopyHelper(G1CollectedHeap* g1h, G1ParScanThreadState* par_scan_state);
126 ~G1ParCopyHelper() { }
127
128 public:
129 void set_scanned_cld(ClassLoaderData* cld) { _scanned_cld = cld; }
130 inline void do_cld_barrier(oop new_obj);
131
132 inline void trim_queue_partially();
133 };
134
135 enum G1Barrier {
136 G1BarrierNone,
137 G1BarrierCLD
138 };
139
140 enum G1Mark {
141 G1MarkNone,
142 G1MarkFromRoot,
143 G1MarkPromotedFromRoot
144 };
145
146 template <G1Barrier barrier, G1Mark do_mark_object>
147 class G1ParCopyClosure : public G1ParCopyHelper {
148 public:
149 G1ParCopyClosure(G1CollectedHeap* g1h, G1ParScanThreadState* par_scan_state) :
150 G1ParCopyHelper(g1h, par_scan_state) { }
151
152 template <class T> void do_oop_work(T* p);
|