140
141 // Not found in cache, due to a cache collision. (Or, no cache at all.)
142 // Do a linear search, most recent to oldest.
143 for (int i = _handles->length() - 1; i >= 0; i--) {
144 if (_handles->at(i) == h) {
145 int findex = i + first_index;
146 if (_no_finds->contains(findex)) continue; // oops; skip this one
147 if (cloc != NULL) {
148 _indexes->set_cache_location_index(cloc, findex);
149 }
150 debug_only(_missed_indexes++);
151 return findex;
152 }
153 }
154 return -1;
155 }
156
157 // Explicitly instantiate these types
158 template class ValueRecorder<Metadata*>;
159 template class ValueRecorder<jobject>;
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140
141 // Not found in cache, due to a cache collision. (Or, no cache at all.)
142 // Do a linear search, most recent to oldest.
143 for (int i = _handles->length() - 1; i >= 0; i--) {
144 if (_handles->at(i) == h) {
145 int findex = i + first_index;
146 if (_no_finds->contains(findex)) continue; // oops; skip this one
147 if (cloc != NULL) {
148 _indexes->set_cache_location_index(cloc, findex);
149 }
150 debug_only(_missed_indexes++);
151 return findex;
152 }
153 }
154 return -1;
155 }
156
157 // Explicitly instantiate these types
158 template class ValueRecorder<Metadata*>;
159 template class ValueRecorder<jobject>;
160
161 oop ObjectLookup::ObjectEntry::oop_value() const { return JNIHandles::resolve(_value); }
162
163 ObjectLookup::ObjectLookup(): _gc_count(Universe::heap()->total_collections()), _values(4) {}
164
165 void ObjectLookup::maybe_resort() {
166 // The values are kept sorted by address which may be invalidated
167 // after a GC, so resort if a GC has occurred since last time.
168 if (_gc_count != Universe::heap()->total_collections()) {
169 _gc_count = Universe::heap()->total_collections();
170 _values.sort(sort_by_address);
171 }
172 }
173
174 int ObjectLookup::sort_by_address(oop a, oop b) {
175 if (b > a) return 1;
176 if (a > b) return -1;
177 return 0;
178 }
179
180 int ObjectLookup::sort_by_address(ObjectEntry* a, ObjectEntry* b) {
181 return sort_by_address(a->oop_value(), b->oop_value());
182 }
183
184 int ObjectLookup::sort_oop_by_address(oop const& a, ObjectEntry const& b) {
185 return sort_by_address(a, b.oop_value());
186 }
187
188 int ObjectLookup::find_index(jobject handle, OopRecorder* oop_recorder) {
189 if (handle == NULL) {
190 return 0;
191 }
192 oop object = JNIHandles::resolve(handle);
193 maybe_resort();
194 bool found;
195 int location = _values.find_sorted<oop, sort_oop_by_address>(object, found);
196 if (!found) {
197 jobject handle = JNIHandles::make_local(object);
198 ObjectEntry r(handle, oop_recorder->allocate_oop_index(handle));
199 _values.insert_before(location, r);
200 return r.index();
201 }
202 return _values.at(location).index();
203 }
204
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