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comparison src/share/vm/memory/genOopClosures.hpp @ 113:ba764ed4b6f2

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6420645: Create a vm that uses compressed oops for up to 32gb heapsizes Summary: Compressed oops in instances, arrays, and headers. Code contributors are coleenp, phh, never, swamyv Reviewed-by: jmasa, kamg, acorn, tbell, kvn, rasbold
author coleenp
date Sun, 13 Apr 2008 17:43:42 -0400
parents a61af66fc99e
children d1605aabd0a1 37f87013dfd8
comparison
equal deleted inserted replaced
110:a49a647afe9a 113:ba764ed4b6f2
26 class HeapWord; 26 class HeapWord;
27 class CardTableRS; 27 class CardTableRS;
28 class CardTableModRefBS; 28 class CardTableModRefBS;
29 class DefNewGeneration; 29 class DefNewGeneration;
30 30
31 template<class E> class GenericTaskQueue;
32 typedef GenericTaskQueue<oop> OopTaskQueue;
33 template<class E> class GenericTaskQueueSet;
34 typedef GenericTaskQueueSet<oop> OopTaskQueueSet;
35
31 // Closure for iterating roots from a particular generation 36 // Closure for iterating roots from a particular generation
32 // Note: all classes deriving from this MUST call this do_barrier 37 // Note: all classes deriving from this MUST call this do_barrier
33 // method at the end of their own do_oop method! 38 // method at the end of their own do_oop method!
34 // Note: no do_oop defined, this is an abstract class. 39 // Note: no do_oop defined, this is an abstract class.
35 40
36 class OopsInGenClosure : public OopClosure { 41 class OopsInGenClosure : public OopClosure {
37 private: 42 private:
38 Generation* _orig_gen; // generation originally set in ctor 43 Generation* _orig_gen; // generation originally set in ctor
39 Generation* _gen; // generation being scanned 44 Generation* _gen; // generation being scanned
40 45
41 protected: 46 protected:
42 // Some subtypes need access. 47 // Some subtypes need access.
43 HeapWord* _gen_boundary; // start of generation 48 HeapWord* _gen_boundary; // start of generation
44 CardTableRS* _rs; // remembered set 49 CardTableRS* _rs; // remembered set
45 50
46 // For assertions 51 // For assertions
47 Generation* generation() { return _gen; } 52 Generation* generation() { return _gen; }
48 CardTableRS* rs() { return _rs; } 53 CardTableRS* rs() { return _rs; }
49 54
50 // Derived classes that modify oops so that they might be old-to-young 55 // Derived classes that modify oops so that they might be old-to-young
51 // pointers must call the method below. 56 // pointers must call the method below.
52 void do_barrier(oop* p); 57 template <class T> void do_barrier(T* p);
53 58
54 public: 59 public:
55 OopsInGenClosure() : OopClosure(NULL), 60 OopsInGenClosure() : OopClosure(NULL),
56 _orig_gen(NULL), _gen(NULL), _gen_boundary(NULL), _rs(NULL) {}; 61 _orig_gen(NULL), _gen(NULL), _gen_boundary(NULL), _rs(NULL) {};
57 62
73 // Closure for scanning DefNewGeneration. 78 // Closure for scanning DefNewGeneration.
74 // 79 //
75 // This closure will perform barrier store calls for ALL 80 // This closure will perform barrier store calls for ALL
76 // pointers in scanned oops. 81 // pointers in scanned oops.
77 class ScanClosure: public OopsInGenClosure { 82 class ScanClosure: public OopsInGenClosure {
78 protected: 83 protected:
79 DefNewGeneration* _g; 84 DefNewGeneration* _g;
80 HeapWord* _boundary; 85 HeapWord* _boundary;
81 bool _gc_barrier; 86 bool _gc_barrier;
82 public: 87 template <class T> inline void do_oop_work(T* p);
88 public:
83 ScanClosure(DefNewGeneration* g, bool gc_barrier); 89 ScanClosure(DefNewGeneration* g, bool gc_barrier);
84 void do_oop(oop* p); 90 virtual void do_oop(oop* p);
85 void do_oop_nv(oop* p); 91 virtual void do_oop(narrowOop* p);
92 inline void do_oop_nv(oop* p);
93 inline void do_oop_nv(narrowOop* p);
86 bool do_header() { return false; } 94 bool do_header() { return false; }
87 Prefetch::style prefetch_style() { 95 Prefetch::style prefetch_style() {
88 return Prefetch::do_write; 96 return Prefetch::do_write;
89 } 97 }
90 }; 98 };
93 // 101 //
94 // This closure only performs barrier store calls on 102 // This closure only performs barrier store calls on
95 // pointers into the DefNewGeneration. This is less 103 // pointers into the DefNewGeneration. This is less
96 // precise, but faster, than a ScanClosure 104 // precise, but faster, than a ScanClosure
97 class FastScanClosure: public OopsInGenClosure { 105 class FastScanClosure: public OopsInGenClosure {
98 protected: 106 protected:
99 DefNewGeneration* _g; 107 DefNewGeneration* _g;
100 HeapWord* _boundary; 108 HeapWord* _boundary;
101 bool _gc_barrier; 109 bool _gc_barrier;
102 public: 110 template <class T> inline void do_oop_work(T* p);
111 public:
103 FastScanClosure(DefNewGeneration* g, bool gc_barrier); 112 FastScanClosure(DefNewGeneration* g, bool gc_barrier);
104 void do_oop(oop* p); 113 virtual void do_oop(oop* p);
105 void do_oop_nv(oop* p); 114 virtual void do_oop(narrowOop* p);
115 inline void do_oop_nv(oop* p);
116 inline void do_oop_nv(narrowOop* p);
106 bool do_header() { return false; } 117 bool do_header() { return false; }
107 Prefetch::style prefetch_style() { 118 Prefetch::style prefetch_style() {
108 return Prefetch::do_write; 119 return Prefetch::do_write;
109 } 120 }
110 }; 121 };
111 122
112 class FilteringClosure: public OopClosure { 123 class FilteringClosure: public OopClosure {
113 HeapWord* _boundary; 124 private:
125 HeapWord* _boundary;
114 OopClosure* _cl; 126 OopClosure* _cl;
115 public: 127 protected:
128 template <class T> inline void do_oop_work(T* p) {
129 T heap_oop = oopDesc::load_heap_oop(p);
130 if (!oopDesc::is_null(heap_oop)) {
131 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop);
132 if ((HeapWord*)obj < _boundary) {
133 _cl->do_oop(p);
134 }
135 }
136 }
137 public:
116 FilteringClosure(HeapWord* boundary, OopClosure* cl) : 138 FilteringClosure(HeapWord* boundary, OopClosure* cl) :
117 OopClosure(cl->_ref_processor), _boundary(boundary), 139 OopClosure(cl->_ref_processor), _boundary(boundary),
118 _cl(cl) {} 140 _cl(cl) {}
119 void do_oop(oop* p); 141 virtual void do_oop(oop* p);
120 void do_oop_nv(oop* p) { 142 virtual void do_oop(narrowOop* p);
121 oop obj = *p; 143 inline void do_oop_nv(oop* p) { FilteringClosure::do_oop_work(p); }
122 if ((HeapWord*)obj < _boundary && obj != NULL) { 144 inline void do_oop_nv(narrowOop* p) { FilteringClosure::do_oop_work(p); }
123 _cl->do_oop(p);
124 }
125 }
126 bool do_header() { return false; } 145 bool do_header() { return false; }
127 }; 146 };
128 147
129 // Closure for scanning DefNewGeneration's weak references. 148 // Closure for scanning DefNewGeneration's weak references.
130 // NOTE: very much like ScanClosure but not derived from 149 // NOTE: very much like ScanClosure but not derived from
131 // OopsInGenClosure -- weak references are processed all 150 // OopsInGenClosure -- weak references are processed all
132 // at once, with no notion of which generation they were in. 151 // at once, with no notion of which generation they were in.
133 class ScanWeakRefClosure: public OopClosure { 152 class ScanWeakRefClosure: public OopClosure {
134 protected: 153 protected:
135 DefNewGeneration* _g; 154 DefNewGeneration* _g;
136 HeapWord* _boundary; 155 HeapWord* _boundary;
137 public: 156 template <class T> inline void do_oop_work(T* p);
157 public:
138 ScanWeakRefClosure(DefNewGeneration* g); 158 ScanWeakRefClosure(DefNewGeneration* g);
139 void do_oop(oop* p); 159 virtual void do_oop(oop* p);
140 void do_oop_nv(oop* p); 160 virtual void do_oop(narrowOop* p);
161 inline void do_oop_nv(oop* p);
162 inline void do_oop_nv(narrowOop* p);
141 }; 163 };
142 164
143 class VerifyOopClosure: public OopClosure { 165 class VerifyOopClosure: public OopClosure {
144 public: 166 protected:
145 void do_oop(oop* p) { 167 template <class T> inline void do_oop_work(T* p) {
146 guarantee((*p)->is_oop_or_null(), "invalid oop"); 168 oop obj = oopDesc::load_decode_heap_oop(p);
169 guarantee(obj->is_oop_or_null(), "invalid oop");
147 } 170 }
171 public:
172 virtual void do_oop(oop* p);
173 virtual void do_oop(narrowOop* p);
148 static VerifyOopClosure verify_oop; 174 static VerifyOopClosure verify_oop;
149 }; 175 };