64 public:
65 OopsInGenClosure() : ExtendedOopClosure(NULL),
66 _orig_gen(NULL), _gen(NULL), _gen_boundary(NULL), _rs(NULL) {};
67
68 OopsInGenClosure(Generation* gen);
69 void set_generation(Generation* gen);
70
71 void reset_generation() { _gen = _orig_gen; }
72
73 // Problem with static closures: must have _gen_boundary set at some point,
74 // but cannot do this until after the heap is initialized.
75 void set_orig_generation(Generation* gen) {
76 _orig_gen = gen;
77 set_generation(gen);
78 }
79
80 HeapWord* gen_boundary() { return _gen_boundary; }
81
82 };
83
84 // Super class for scan closures. It contains code to dirty scanned Klasses.
85 class OopsInKlassOrGenClosure: public OopsInGenClosure {
86 Klass* _scanned_klass;
87 public:
88 OopsInKlassOrGenClosure(Generation* g) : OopsInGenClosure(g), _scanned_klass(NULL) {}
89 void set_scanned_klass(Klass* k) {
90 assert(k == NULL || _scanned_klass == NULL, "Must be");
91 _scanned_klass = k;
92 }
93 bool is_scanning_a_klass() { return _scanned_klass != NULL; }
94 void do_klass_barrier();
95 };
96
97 // Closure for scanning DefNewGeneration.
98 //
99 // This closure will perform barrier store calls for ALL
100 // pointers in scanned oops.
101 class ScanClosure: public OopsInKlassOrGenClosure {
102 protected:
103 DefNewGeneration* _g;
104 HeapWord* _boundary;
105 bool _gc_barrier;
106 template <class T> inline void do_oop_work(T* p);
107 public:
108 ScanClosure(DefNewGeneration* g, bool gc_barrier);
109 virtual void do_oop(oop* p);
110 virtual void do_oop(narrowOop* p);
111 inline void do_oop_nv(oop* p);
112 inline void do_oop_nv(narrowOop* p);
113 };
114
115 // Closure for scanning DefNewGeneration.
116 //
117 // This closure only performs barrier store calls on
118 // pointers into the DefNewGeneration. This is less
119 // precise, but faster, than a ScanClosure
120 class FastScanClosure: public OopsInKlassOrGenClosure {
121 protected:
122 DefNewGeneration* _g;
123 HeapWord* _boundary;
124 bool _gc_barrier;
125 template <class T> inline void do_oop_work(T* p);
126 public:
127 FastScanClosure(DefNewGeneration* g, bool gc_barrier);
128 virtual void do_oop(oop* p);
129 virtual void do_oop(narrowOop* p);
130 inline void do_oop_nv(oop* p);
131 inline void do_oop_nv(narrowOop* p);
132 };
133
134 class KlassScanClosure: public KlassClosure {
135 OopsInKlassOrGenClosure* _scavenge_closure;
136 // true if the the modified oops state should be saved.
137 bool _accumulate_modified_oops;
138 public:
139 KlassScanClosure(OopsInKlassOrGenClosure* scavenge_closure,
140 KlassRemSet* klass_rem_set_policy);
141 void do_klass(Klass* k);
142 };
143
144 class FilteringClosure: public ExtendedOopClosure {
145 private:
146 HeapWord* _boundary;
147 ExtendedOopClosure* _cl;
148 protected:
149 template <class T> inline void do_oop_work(T* p);
150 public:
151 FilteringClosure(HeapWord* boundary, ExtendedOopClosure* cl) :
152 ExtendedOopClosure(cl->ref_processor()), _boundary(boundary),
153 _cl(cl) {}
154 virtual void do_oop(oop* p);
155 virtual void do_oop(narrowOop* p);
156 inline void do_oop_nv(oop* p);
157 inline void do_oop_nv(narrowOop* p);
158 virtual bool do_metadata() { return do_metadata_nv(); }
159 inline bool do_metadata_nv() { assert(!_cl->do_metadata(), "assumption broken, must change to 'return _cl->do_metadata()'"); return false; }
160 };
161
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64 public:
65 OopsInGenClosure() : ExtendedOopClosure(NULL),
66 _orig_gen(NULL), _gen(NULL), _gen_boundary(NULL), _rs(NULL) {};
67
68 OopsInGenClosure(Generation* gen);
69 void set_generation(Generation* gen);
70
71 void reset_generation() { _gen = _orig_gen; }
72
73 // Problem with static closures: must have _gen_boundary set at some point,
74 // but cannot do this until after the heap is initialized.
75 void set_orig_generation(Generation* gen) {
76 _orig_gen = gen;
77 set_generation(gen);
78 }
79
80 HeapWord* gen_boundary() { return _gen_boundary; }
81
82 };
83
84 // Super class for scan closures. It contains code to dirty scanned class loader data.
85 class OopsInClassLoaderDataOrGenClosure: public OopsInGenClosure {
86 ClassLoaderData* _scanned_cld;
87 public:
88 OopsInClassLoaderDataOrGenClosure(Generation* g) : OopsInGenClosure(g), _scanned_cld(NULL) {}
89 void set_scanned_cld(ClassLoaderData* cld) {
90 assert(cld == NULL || _scanned_cld == NULL, "Must be");
91 _scanned_cld = cld;
92 }
93 bool is_scanning_a_cld() { return _scanned_cld != NULL; }
94 void do_cld_barrier();
95 };
96
97
98 // Closure for scanning DefNewGeneration.
99 //
100 // This closure will perform barrier store calls for ALL
101 // pointers in scanned oops.
102 class ScanClosure: public OopsInClassLoaderDataOrGenClosure {
103 protected:
104 DefNewGeneration* _g;
105 HeapWord* _boundary;
106 bool _gc_barrier;
107 template <class T> inline void do_oop_work(T* p);
108 public:
109 ScanClosure(DefNewGeneration* g, bool gc_barrier);
110 virtual void do_oop(oop* p);
111 virtual void do_oop(narrowOop* p);
112 inline void do_oop_nv(oop* p);
113 inline void do_oop_nv(narrowOop* p);
114 };
115
116 // Closure for scanning DefNewGeneration.
117 //
118 // This closure only performs barrier store calls on
119 // pointers into the DefNewGeneration. This is less
120 // precise, but faster, than a ScanClosure
121 class FastScanClosure: public OopsInClassLoaderDataOrGenClosure {
122 protected:
123 DefNewGeneration* _g;
124 HeapWord* _boundary;
125 bool _gc_barrier;
126 template <class T> inline void do_oop_work(T* p);
127 public:
128 FastScanClosure(DefNewGeneration* g, bool gc_barrier);
129 virtual void do_oop(oop* p);
130 virtual void do_oop(narrowOop* p);
131 inline void do_oop_nv(oop* p);
132 inline void do_oop_nv(narrowOop* p);
133 };
134
135 class CLDScanClosure: public CLDClosure {
136 OopsInClassLoaderDataOrGenClosure* _scavenge_closure;
137 // true if the the modified oops state should be saved.
138 bool _accumulate_modified_oops;
139 public:
140 CLDScanClosure(OopsInClassLoaderDataOrGenClosure* scavenge_closure,
141 bool accumulate_modified_oops) :
142 _scavenge_closure(scavenge_closure), _accumulate_modified_oops(accumulate_modified_oops) {}
143 void do_cld(ClassLoaderData* k);
144 };
145
146 class FilteringClosure: public ExtendedOopClosure {
147 private:
148 HeapWord* _boundary;
149 ExtendedOopClosure* _cl;
150 protected:
151 template <class T> inline void do_oop_work(T* p);
152 public:
153 FilteringClosure(HeapWord* boundary, ExtendedOopClosure* cl) :
154 ExtendedOopClosure(cl->ref_processor()), _boundary(boundary),
155 _cl(cl) {}
156 virtual void do_oop(oop* p);
157 virtual void do_oop(narrowOop* p);
158 inline void do_oop_nv(oop* p);
159 inline void do_oop_nv(narrowOop* p);
160 virtual bool do_metadata() { return do_metadata_nv(); }
161 inline bool do_metadata_nv() { assert(!_cl->do_metadata(), "assumption broken, must change to 'return _cl->do_metadata()'"); return false; }
162 };
163
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