161 _size_index = size_index;
162 _size = initial_size;
163 _entry_count = 0;
164 _trace_threshold = initial_trace_threshold;
165 _load_factor = load_factor;
166 _resize_threshold = (int)(_load_factor * _size);
167 _resizing_enabled = true;
168 size_t s = initial_size * sizeof(JvmtiTagHashmapEntry*);
169 _table = (JvmtiTagHashmapEntry**)os::malloc(s, mtInternal);
170 if (_table == NULL) {
171 vm_exit_out_of_memory(s, OOM_MALLOC_ERROR,
172 "unable to allocate initial hashtable for jvmti object tags");
173 }
174 for (int i=0; i<initial_size; i++) {
175 _table[i] = NULL;
176 }
177 }
178
179 // hash a given key (oop) with the specified size
180 static unsigned int hash(oop key, int size) {
181 // shift right to get better distribution (as these bits will be zero
182 // with aligned addresses)
183 unsigned int addr = (unsigned int)(cast_from_oop<intptr_t>(key));
184 #ifdef _LP64
185 return (addr >> 3) % size;
186 #else
187 return (addr >> 2) % size;
188 #endif
189 }
190
191 // hash a given key (oop)
192 unsigned int hash(oop key) {
193 return hash(key, _size);
194 }
195
196 // resize the hashmap - allocates a large table and re-hashes
197 // all entries into the new table.
198 void resize() {
199 int new_size_index = _size_index+1;
200 int new_size = _sizes[new_size_index];
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161 _size_index = size_index;
162 _size = initial_size;
163 _entry_count = 0;
164 _trace_threshold = initial_trace_threshold;
165 _load_factor = load_factor;
166 _resize_threshold = (int)(_load_factor * _size);
167 _resizing_enabled = true;
168 size_t s = initial_size * sizeof(JvmtiTagHashmapEntry*);
169 _table = (JvmtiTagHashmapEntry**)os::malloc(s, mtInternal);
170 if (_table == NULL) {
171 vm_exit_out_of_memory(s, OOM_MALLOC_ERROR,
172 "unable to allocate initial hashtable for jvmti object tags");
173 }
174 for (int i=0; i<initial_size; i++) {
175 _table[i] = NULL;
176 }
177 }
178
179 // hash a given key (oop) with the specified size
180 static unsigned int hash(oop key, int size) {
181 ZGC_ONLY(assert(ZAddressMetadataShift >= sizeof(unsigned int) * BitsPerByte, "cast removes the metadata bits");)
182
183 // shift right to get better distribution (as these bits will be zero
184 // with aligned addresses)
185 unsigned int addr = (unsigned int)(cast_from_oop<intptr_t>(key));
186 #ifdef _LP64
187 return (addr >> 3) % size;
188 #else
189 return (addr >> 2) % size;
190 #endif
191 }
192
193 // hash a given key (oop)
194 unsigned int hash(oop key) {
195 return hash(key, _size);
196 }
197
198 // resize the hashmap - allocates a large table and re-hashes
199 // all entries into the new table.
200 void resize() {
201 int new_size_index = _size_index+1;
202 int new_size = _sizes[new_size_index];
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