127 ~InterpreterOopMap();
128
129 // Copy the OopMapCacheEntry in parameter "from" into this
130 // InterpreterOopMap. If the _bit_mask[0] in "from" points to
131 // allocated space (i.e., the bit mask was to large to hold
132 // in-line), allocate the space from a Resource area.
133 void resource_copy(OopMapCacheEntry* from);
134
135 void iterate_oop(OffsetClosure* oop_closure) const;
136 void print() const;
137
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; }
140 bool is_oop (int offset) const { return (entry_at(offset) & (1 << oop_bit_number )) != 0; }
141
142 int expression_stack_size() const { return _expression_stack_size; }
143
144 };
145
146 class OopMapCache : public CHeapObj<mtClass> {
147 private:
148 enum { _size = 32, // Use fixed size for now
149 _probe_depth = 3 // probe depth in case of collisions
150 };
151
152 OopMapCacheEntry* _array;
153
154 unsigned int hash_value_for(const methodHandle& method, int bci) const;
155 OopMapCacheEntry* entry_at(int i) const;
156
157 mutable Mutex _mut;
158
159 void flush();
160
161 public:
162 OopMapCache();
163 ~OopMapCache(); // free up memory
164
165 // flush cache entry is occupied by an obsolete method
166 void flush_obsolete_entries();
167
168 // Returns the oopMap for (method, bci) in parameter "entry".
169 // Returns false if an oop map was not found.
170 void lookup(const methodHandle& method, int bci, InterpreterOopMap* entry) const;
171
172 // Compute an oop map without updating the cache or grabbing any locks (for debugging)
173 static void compute_one_oop_map(const methodHandle& method, int bci, InterpreterOopMap* entry);
174
175 // Returns total no. of bytes allocated as part of OopMapCache's
176 static long memory_usage() PRODUCT_RETURN0;
177 };
178
179 #endif // SHARE_VM_INTERPRETER_OOPMAPCACHE_HPP
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127 ~InterpreterOopMap();
128
129 // Copy the OopMapCacheEntry in parameter "from" into this
130 // InterpreterOopMap. If the _bit_mask[0] in "from" points to
131 // allocated space (i.e., the bit mask was to large to hold
132 // in-line), allocate the space from a Resource area.
133 void resource_copy(OopMapCacheEntry* from);
134
135 void iterate_oop(OffsetClosure* oop_closure) const;
136 void print() const;
137
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; }
140 bool is_oop (int offset) const { return (entry_at(offset) & (1 << oop_bit_number )) != 0; }
141
142 int expression_stack_size() const { return _expression_stack_size; }
143
144 };
145
146 class OopMapCache : public CHeapObj<mtClass> {
147 static OopMapCacheEntry* volatile _old_entries;
148 private:
149 enum { _size = 32, // Use fixed size for now
150 _probe_depth = 3 // probe depth in case of collisions
151 };
152
153 OopMapCacheEntry* volatile* _array;
154
155 unsigned int hash_value_for(const methodHandle& method, int bci) const;
156 OopMapCacheEntry* entry_at(int i) const;
157 bool put_at(int i, OopMapCacheEntry* entry, OopMapCacheEntry* old);
158
159 static void enqueue_for_cleanup(OopMapCacheEntry* entry);
160
161 void flush();
162
163 public:
164 OopMapCache();
165 ~OopMapCache(); // free up memory
166
167 // flush cache entry is occupied by an obsolete method
168 void flush_obsolete_entries();
169
170 // Returns the oopMap for (method, bci) in parameter "entry".
171 // Returns false if an oop map was not found.
172 void lookup(const methodHandle& method, int bci, InterpreterOopMap* entry);
173
174 // Compute an oop map without updating the cache or grabbing any locks (for debugging)
175 static void compute_one_oop_map(const methodHandle& method, int bci, InterpreterOopMap* entry);
176 static void cleanup_old_entries();
177 };
178
179 #endif // SHARE_VM_INTERPRETER_OOPMAPCACHE_HPP
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