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comparison src/share/vm/code/oopRecorder.hpp @ 17375:44b83285b645

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Deduplicate constant oops during code installation
author Tom Rodriguez <tom.rodriguez@oracle.com>
date Wed, 08 Oct 2014 11:50:00 -0700
parents 9928ad27a80e
children 50942f016967
comparison
equal deleted inserted replaced
17374:9928ad27a80e 17375:44b83285b645
144 #ifdef ASSERT 144 #ifdef ASSERT
145 static int _find_index_calls, _hit_indexes, _missed_indexes; 145 static int _find_index_calls, _hit_indexes, _missed_indexes;
146 #endif 146 #endif
147 }; 147 };
148 148
149 class OopRecorder;
150
151 class ObjectLookup : public ResourceObj {
152 private:
153 class ObjectEntry {
154 private:
155 jobject _value;
156 int _index;
157
158 public:
159 ObjectEntry(jobject value, int index): _value(value), _index(index) {}
160 ObjectEntry() {}
161 oop oop_value(); // { return JNIHandles::resolve(_value); }
162 int index() { return _index; }
163 };
164
165 GrowableArray<ObjectEntry> _values;
166 unsigned int _gc_count;
167
168 // Utility sort functions
169 static int sort_by_address(oop a, oop b);
170 static int sort_by_address(ObjectEntry* a, ObjectEntry* b);
171 static int sort_oop_by_address(oop a, ObjectEntry b);
172
173 public:
174 ObjectLookup();
175
176 // Resort list if a GC has occurred since the last sort
177 void maybe_resort();
178 int find_index(jobject object, OopRecorder* oop_recorder);
179 };
180
149 class OopRecorder : public ResourceObj { 181 class OopRecorder : public ResourceObj {
150 private: 182 private:
151 ValueRecorder<jobject> _oops; 183 ValueRecorder<jobject> _oops;
152 ValueRecorder<Metadata*> _metadata; 184 ValueRecorder<Metadata*> _metadata;
185 ObjectLookup* _object_lookup;
153 public: 186 public:
154 OopRecorder(Arena* arena = NULL): _oops(arena), _metadata(arena) {} 187 OopRecorder(Arena* arena = NULL, bool deduplicate = false): _oops(arena), _metadata(arena) {
188 if (deduplicate) {
189 _object_lookup = new ObjectLookup();
190 } else {
191 _object_lookup = NULL;
192 }
193 }
155 194
156 void check_for_duplicates(int index, jobject h) NOT_DEBUG_RETURN; 195 void check_for_duplicates(int index, jobject h) NOT_DEBUG_RETURN;
157 196
158 int allocate_oop_index(jobject h) { 197 int allocate_oop_index(jobject h) {
159 return _oops.allocate_index(h); 198 return _oops.allocate_index(h);
160 } 199 }
161 int find_index(jobject h) { 200 int find_index(jobject h) {
162 int result = _oops.find_index(h); 201 int result = _object_lookup != NULL ? _object_lookup->find_index(h, this) : _oops.find_index(h);
163 check_for_duplicates(result, h); 202 check_for_duplicates(result, h);
164 return result; 203 return result;
165 } 204 }
166 jobject oop_at(int index) { 205 jobject oop_at(int index) {
167 return _oops.at(index); 206 return _oops.at(index);