Mercurial > jdk8-mips64-public > hotspot / file comparison
comparison: src/share/vm/interpreter/oopMapCache.hpp
src/share/vm/interpreter/oopMapCache.hpp
- changeset 7668
- 9cfc607cb03e
- parent 7215
- c204e2044c29
- child 7994
- 04ff2f6cd0eb
- child 9351
- bae7d3cdf6af
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| 7667:e982379a7119 | 7668:9cfc607cb03e |
|---|---|
| 64 class InterpreterOopMap: ResourceObj { | 64 class InterpreterOopMap: ResourceObj { |
| 65 friend class OopMapCache; | 65 friend class OopMapCache; |
| 66 | 66 |
| 67 public: | 67 public: |
| 68 enum { | 68 enum { |
| 69 N = 2, // the number of words reserved | 69 N = 4, // the number of words reserved |
| 70 // for inlined mask storage | 70 // for inlined mask storage |
| 71 small_mask_limit = N * BitsPerWord, // the maximum number of bits | 71 small_mask_limit = N * BitsPerWord, // the maximum number of bits |
| 72 // available for small masks, | 72 // available for small masks, |
| 73 // small_mask_limit can be set to 0 | 73 // small_mask_limit can be set to 0 |
| 74 // for testing bit_mask allocation | 74 // for testing bit_mask allocation |
| 75 | 75 |
| 76 #ifdef ENABLE_ZAP_DEAD_LOCALS | |
| 77 bits_per_entry = 2, | 76 bits_per_entry = 2, |
| 78 dead_bit_number = 1, | 77 dead_bit_number = 1, |
| 79 #else | |
| 80 bits_per_entry = 1, | |
| 81 #endif | |
| 82 oop_bit_number = 0 | 78 oop_bit_number = 0 |
| 83 }; | 79 }; |
| 84 | 80 |
| 85 private: | 81 private: |
| 86 Method* _method; // the method for which the mask is valid | 82 Method* _method; // the method for which the mask is valid |
| 117 | 113 |
| 118 uintptr_t entry_at(int offset) const { int i = offset * bits_per_entry; return bit_mask()[i / BitsPerWord] >> (i % BitsPerWord); } | 114 uintptr_t entry_at(int offset) const { int i = offset * bits_per_entry; return bit_mask()[i / BitsPerWord] >> (i % BitsPerWord); } |
| 119 | 115 |
| 120 void set_expression_stack_size(int sz) { _expression_stack_size = sz; } | 116 void set_expression_stack_size(int sz) { _expression_stack_size = sz; } |
| 121 | 117 |
| 122 #ifdef ENABLE_ZAP_DEAD_LOCALS | |
| 123 bool is_dead(int offset) const { return (entry_at(offset) & (1 << dead_bit_number)) != 0; } | |
| 124 #endif | |
| 125 | |
| 126 // Lookup | 118 // Lookup |
| 127 bool match(methodHandle method, int bci) const { return _method == method() && _bci == bci; } | 119 bool match(methodHandle method, int bci) const { return _method == method() && _bci == bci; } |
| 128 bool is_empty() const; | 120 bool is_empty() const; |
| 129 | 121 |
| 130 // Initialization | 122 // Initialization |
| 142 | 134 |
| 143 void iterate_oop(OffsetClosure* oop_closure) const; | 135 void iterate_oop(OffsetClosure* oop_closure) const; |
| 144 void print() const; | 136 void print() const; |
| 145 | 137 |
| 146 int number_of_entries() const { return mask_size() / bits_per_entry; } | 138 int number_of_entries() const { return mask_size() / bits_per_entry; } |
| 139 bool is_dead(int offset) const { return (entry_at(offset) & (1 << dead_bit_number)) != 0; } | |
| 147 bool is_oop (int offset) const { return (entry_at(offset) & (1 << oop_bit_number )) != 0; } | 140 bool is_oop (int offset) const { return (entry_at(offset) & (1 << oop_bit_number )) != 0; } |
| 148 | 141 |
| 149 int expression_stack_size() const { return _expression_stack_size; } | 142 int expression_stack_size() const { return _expression_stack_size; } |
| 150 | 143 |
| 151 #ifdef ENABLE_ZAP_DEAD_LOCALS | 144 #ifdef ENABLE_ZAP_DEAD_LOCALS |
