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comparison src/share/vm/oops/instanceKlass.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 31000d79ec71
children 437d03ea40b1 37f87013dfd8
comparison
equal deleted inserted replaced
110:a49a647afe9a 113:ba764ed4b6f2
178 178
179 // 179 //
180 // End of the oop block. 180 // End of the oop block.
181 // 181 //
182 182
183 int _nonstatic_field_size; // number of non-static fields in this klass (including inherited fields) 183 // number of words used by non-static fields in this klass (including
184 int _static_field_size; // number of static fields (oop and non-oop) in this klass 184 // inherited fields but after header_size()). If fields are compressed into
185 // header, this can be zero so it's not the same as number of static fields.
186 int _nonstatic_field_size;
187 int _static_field_size; // number words used by static fields (oop and non-oop) in this klass
185 int _static_oop_field_size;// number of static oop fields in this klass 188 int _static_oop_field_size;// number of static oop fields in this klass
186 int _nonstatic_oop_map_size;// number of nonstatic oop-map blocks allocated at end of this klass 189 int _nonstatic_oop_map_size;// number of nonstatic oop-map blocks allocated at end of this klass
187 bool _is_marked_dependent; // used for marking during flushing and deoptimization 190 bool _is_marked_dependent; // used for marking during flushing and deoptimization
188 bool _rewritten; // methods rewritten. 191 bool _rewritten; // methods rewritten.
192 bool _has_nonstatic_fields; // for sizing with UseCompressedOops
189 u2 _minor_version; // minor version number of class file 193 u2 _minor_version; // minor version number of class file
190 u2 _major_version; // major version number of class file 194 u2 _major_version; // major version number of class file
191 ClassState _init_state; // state of class 195 ClassState _init_state; // state of class
192 Thread* _init_thread; // Pointer to current thread doing initialization (to handle recusive initialization) 196 Thread* _init_thread; // Pointer to current thread doing initialization (to handle recusive initialization)
193 int _vtable_len; // length of Java vtable (in words) 197 int _vtable_len; // length of Java vtable (in words)
219 223
220 friend class instanceKlassKlass; 224 friend class instanceKlassKlass;
221 friend class SystemDictionary; 225 friend class SystemDictionary;
222 226
223 public: 227 public:
228 bool has_nonstatic_fields() const { return _has_nonstatic_fields; }
229 void set_has_nonstatic_fields(bool b) { _has_nonstatic_fields = b; }
230
224 // field sizes 231 // field sizes
225 int nonstatic_field_size() const { return _nonstatic_field_size; } 232 int nonstatic_field_size() const { return _nonstatic_field_size; }
226 void set_nonstatic_field_size(int size) { _nonstatic_field_size = size; } 233 void set_nonstatic_field_size(int size) { _nonstatic_field_size = size; }
227 234
228 int static_field_size() const { return _static_field_size; } 235 int static_field_size() const { return _static_field_size; }
338 // find instance or static fields according to JVM spec 5.4.3.2, returns the klass in which the field is defined 345 // find instance or static fields according to JVM spec 5.4.3.2, returns the klass in which the field is defined
339 klassOop find_field(symbolOop name, symbolOop sig, bool is_static, fieldDescriptor* fd) const; 346 klassOop find_field(symbolOop name, symbolOop sig, bool is_static, fieldDescriptor* fd) const;
340 347
341 // find a non-static or static field given its offset within the class. 348 // find a non-static or static field given its offset within the class.
342 bool contains_field_offset(int offset) { 349 bool contains_field_offset(int offset) {
343 return ((offset/wordSize) >= instanceOopDesc::header_size() && 350 return instanceOopDesc::contains_field_offset(offset, nonstatic_field_size());
344 (offset/wordSize)-instanceOopDesc::header_size() < nonstatic_field_size());
345 } 351 }
346 352
347 bool find_local_field_from_offset(int offset, bool is_static, fieldDescriptor* fd) const; 353 bool find_local_field_from_offset(int offset, bool is_static, fieldDescriptor* fd) const;
348 bool find_field_from_offset(int offset, bool is_static, fieldDescriptor* fd) const; 354 bool find_field_from_offset(int offset, bool is_static, fieldDescriptor* fd) const;
349 355
568 574
569 intptr_t* start_of_vtable() const { return ((intptr_t*)as_klassOop()) + vtable_start_offset(); } 575 intptr_t* start_of_vtable() const { return ((intptr_t*)as_klassOop()) + vtable_start_offset(); }
570 intptr_t* start_of_itable() const { return start_of_vtable() + align_object_offset(vtable_length()); } 576 intptr_t* start_of_itable() const { return start_of_vtable() + align_object_offset(vtable_length()); }
571 int itable_offset_in_words() const { return start_of_itable() - (intptr_t*)as_klassOop(); } 577 int itable_offset_in_words() const { return start_of_itable() - (intptr_t*)as_klassOop(); }
572 578
573 oop* start_of_static_fields() const { return (oop*)(start_of_itable() + align_object_offset(itable_length())); } 579 // Static field offset is an offset into the Heap, should be converted by
580 // based on UseCompressedOop for traversal
581 HeapWord* start_of_static_fields() const {
582 return (HeapWord*)(start_of_itable() + align_object_offset(itable_length()));
583 }
584
574 intptr_t* end_of_itable() const { return start_of_itable() + itable_length(); } 585 intptr_t* end_of_itable() const { return start_of_itable() + itable_length(); }
575 oop* end_of_static_fields() const { return start_of_static_fields() + static_field_size(); } 586
576 int offset_of_static_fields() const { return (intptr_t)start_of_static_fields() - (intptr_t)as_klassOop(); } 587 int offset_of_static_fields() const {
577 588 return (intptr_t)start_of_static_fields() - (intptr_t)as_klassOop();
578 OopMapBlock* start_of_nonstatic_oop_maps() const { return (OopMapBlock*) (start_of_static_fields() + static_field_size()); } 589 }
590
591 OopMapBlock* start_of_nonstatic_oop_maps() const {
592 return (OopMapBlock*) (start_of_static_fields() + static_field_size());
593 }
579 594
580 // Allocation profiling support 595 // Allocation profiling support
581 juint alloc_size() const { return _alloc_count * size_helper(); } 596 juint alloc_size() const { return _alloc_count * size_helper(); }
582 void set_alloc_size(juint n) {} 597 void set_alloc_size(juint n) {}
583 598