118 void add_protection_domain(int index, unsigned int hash,
119 instanceKlassHandle klass, ClassLoaderData* loader_data,
120 Handle protection_domain, TRAPS);
121
122 // Sharing support
123 void reorder_dictionary();
124
125 ProtectionDomainCacheEntry* cache_get(oop protection_domain);
126
127 #ifndef PRODUCT
128 void print();
129 #endif
130 void verify();
131 };
132
133 // The following classes can be in dictionary.cpp, but we need these
134 // to be in header file so that SA's vmStructs can access them.
135 class ProtectionDomainCacheEntry : public HashtableEntry<oop, mtClass> {
136 friend class VMStructs;
137 private:
138 int _refcount;
139 int _scan_generation;
140 public:
141 oop protection_domain() { return literal(); }
142
143 void increment_refcount() {
144 assert(_refcount >= 0, "sanity");
145 _refcount++;
146 }
147
148 int refcount() { return _refcount; }
149 int decrement_refcount() {
150 assert(_refcount > 0, "sanity");
151 _refcount--;
152 return _refcount;
153 }
154
155 void init() {
156 _refcount = 0;
157 _scan_generation = 0;
158 }
159
160 ProtectionDomainCacheEntry* next() {
161 return (ProtectionDomainCacheEntry*)HashtableEntry<oop, mtClass>::next();
162 }
163
164 ProtectionDomainCacheEntry** next_addr() {
165 return (ProtectionDomainCacheEntry**)HashtableEntry<oop, mtClass>::next_addr();
166 }
167
168 void oops_do(OopClosure* f) {
169 f->do_oop(literal_addr());
170 }
171
172 void set_strongly_reachable(int gen) { _scan_generation = gen; }
173
174 bool is_strongly_reachable(int gen) { return _scan_generation == gen; }
175 };
176
177 class ProtectionDomainCacheTable : public Hashtable<oop, mtClass> {
178 friend class VMStructs;
179 private:
180 ProtectionDomainCacheEntry* bucket(int i) {
181 return (ProtectionDomainCacheEntry*) Hashtable<oop, mtClass>::bucket(i);
182 }
183
184 // The following method is not MT-safe and must be done under lock.
185 ProtectionDomainCacheEntry** bucket_addr(int i) {
186 return (ProtectionDomainCacheEntry**) Hashtable<oop, mtClass>::bucket_addr(i);
187 }
188
189 ProtectionDomainCacheEntry* new_entry(unsigned int hash, oop protection_domain) {
190 ProtectionDomainCacheEntry* entry = (ProtectionDomainCacheEntry*) Hashtable<oop, mtClass>::new_entry(hash, protection_domain);
191 entry->init();
192 return entry;
193 }
194
195 unsigned int compute_hash(oop protection_domain) {
196 return (unsigned int)(protection_domain->identity_hash());
197 }
198
199 int index_for(oop protection_domain) {
200 return hash_to_index(compute_hash(protection_domain));
201 }
202
203 ProtectionDomainCacheEntry* add_entry(int index, unsigned int hash, oop protection_domain);
204 ProtectionDomainCacheEntry* find_entry(int index, oop protection_domain);
205
206 public:
207
208 ProtectionDomainCacheTable(int table_size);
209
210 ProtectionDomainCacheEntry* get(oop protection_domain);
211 void free(ProtectionDomainCacheEntry* entry);
212
213 // GC support
214 void oops_do(OopClosure* f);
215 void always_strong_oops_do(OopClosure* f, int gen);
216
217 #ifndef PRODUCT
218 void print();
219 #endif
220 void verify();
221 };
222
223
224 class ProtectionDomainEntry :public CHeapObj<mtClass> {
225 friend class VMStructs;
226 public:
227 ProtectionDomainEntry* _next;
228 ProtectionDomainCacheEntry* _pd_cache;
229
230 ProtectionDomainEntry(ProtectionDomainCacheEntry* pd_cache, ProtectionDomainEntry* next) {
231 _pd_cache = pd_cache;
232 _next = next;
233 _pd_cache->increment_refcount();
234 }
235
236 ProtectionDomainEntry* next() { return _next; }
237 oop protection_domain() { return _pd_cache->protection_domain(); }
238 ProtectionDomainCacheEntry * release_pd_cache() {
239 if (_pd_cache->decrement_refcount() == 0) {
240 return _pd_cache;
241 } else {
242 return NULL;
243 }
244 }
245 };
246
247 // An entry in the system dictionary, this describes a class as
248 // { Klass*, loader, protection_domain }.
249
250 class DictionaryEntry : public HashtableEntry<Klass*, mtClass> {
251 friend class VMStructs;
252 private:
253 // Contains the set of approved protection domains that can access
254 // this system dictionary entry.
255 ProtectionDomainEntry* _pd_set;
256 ClassLoaderData* _loader_data;
257
273 }
274
275 ClassLoaderData* loader_data() const { return _loader_data; }
276 void set_loader_data(ClassLoaderData* loader_data) { _loader_data = loader_data; }
277
278 ProtectionDomainEntry* pd_set() const { return _pd_set; }
279 void set_pd_set(ProtectionDomainEntry* pd_set) { _pd_set = pd_set; }
280
281 bool has_protection_domain() { return _pd_set != NULL; }
282
283 // Tells whether the initiating class' protection can access the this _klass
284 bool is_valid_protection_domain(Handle protection_domain) {
285 if (!ProtectionDomainVerification) return true;
286 if (!SystemDictionary::has_checkPackageAccess()) return true;
287
288 return protection_domain() == NULL
289 ? true
290 : contains_protection_domain(protection_domain());
291 }
292
293 void set_strongly_reachable(int gen) {
294 for (ProtectionDomainEntry* current = _pd_set;
295 current != NULL;
296 current = current->_next) {
297 current->_pd_cache->set_strongly_reachable(gen);
298 }
299 }
300
301 void verify_protection_domain_set() {
302 for (ProtectionDomainEntry* current = _pd_set;
303 current != NULL;
304 current = current->_next) {
305 current->_pd_cache->protection_domain()->verify();
306 }
307 }
308
309 bool equals(Symbol* class_name, ClassLoaderData* loader_data) const {
310 Klass* klass = (Klass*)literal();
311 return (InstanceKlass::cast(klass)->name() == class_name &&
312 _loader_data == loader_data);
313 }
314
315 void print() {
316 int count = 0;
317 for (ProtectionDomainEntry* current = _pd_set;
|
118 void add_protection_domain(int index, unsigned int hash,
119 instanceKlassHandle klass, ClassLoaderData* loader_data,
120 Handle protection_domain, TRAPS);
121
122 // Sharing support
123 void reorder_dictionary();
124
125 ProtectionDomainCacheEntry* cache_get(oop protection_domain);
126
127 #ifndef PRODUCT
128 void print();
129 #endif
130 void verify();
131 };
132
133 // The following classes can be in dictionary.cpp, but we need these
134 // to be in header file so that SA's vmStructs can access them.
135 class ProtectionDomainCacheEntry : public HashtableEntry<oop, mtClass> {
136 friend class VMStructs;
137 private:
138 // the number of system dictionary entries referring to this entry
139 int _refcount;
140 // flag indicating whether this protection domain entry is strongly reachable.
141 // Used during iterating over the system dictionary to remember oops that need
142 // to be updated.
143 bool _strongly_reachable;
144 public:
145 oop protection_domain() { return literal(); }
146
147 void increment_refcount() {
148 assert(_refcount >= 0, "sanity");
149 _refcount++;
150 }
151
152 int refcount() { return _refcount; }
153 int decrement_refcount() {
154 assert(_refcount > 0, "sanity");
155 _refcount--;
156 return _refcount;
157 }
158
159 void init() {
160 _refcount = 0;
161 _strongly_reachable = false;
162 }
163
164 ProtectionDomainCacheEntry* next() {
165 return (ProtectionDomainCacheEntry*)HashtableEntry<oop, mtClass>::next();
166 }
167
168 ProtectionDomainCacheEntry** next_addr() {
169 return (ProtectionDomainCacheEntry**)HashtableEntry<oop, mtClass>::next_addr();
170 }
171
172 void oops_do(OopClosure* f) {
173 f->do_oop(literal_addr());
174 }
175
176 void set_strongly_reachable() { _strongly_reachable = true; }
177
178 bool is_strongly_reachable() { return _strongly_reachable; }
179
180 void reset_strongly_reachable() { _strongly_reachable = false; }
181
182 void print() PRODUCT_RETURN;
183 void verify();
184 };
185
186 // the ProtectionDomainCacheTable contains all protection domain oops. The system
187 // dictionary entries reference its entries instead of having references to oops
188 // directly.
189 // This is used to speed up system dictionary iteration: the oops in the
190 // protection domain are the only ones referring the Java heap. So when there is
191 // need to update these, instead of going over every entry of the system dictionary,
192 // we only need to iterate over this set.
193 // The amount of different protection domains used is typically magnitudes smaller
194 // than the number of system dictionary entries (loaded classes).
195 class ProtectionDomainCacheTable : public Hashtable<oop, mtClass> {
196 friend class VMStructs;
197 private:
198 ProtectionDomainCacheEntry* bucket(int i) {
199 return (ProtectionDomainCacheEntry*) Hashtable<oop, mtClass>::bucket(i);
200 }
201
202 // The following method is not MT-safe and must be done under lock.
203 ProtectionDomainCacheEntry** bucket_addr(int i) {
204 return (ProtectionDomainCacheEntry**) Hashtable<oop, mtClass>::bucket_addr(i);
205 }
206
207 ProtectionDomainCacheEntry* new_entry(unsigned int hash, oop protection_domain) {
208 ProtectionDomainCacheEntry* entry = (ProtectionDomainCacheEntry*) Hashtable<oop, mtClass>::new_entry(hash, protection_domain);
209 entry->init();
210 return entry;
211 }
212
213 static unsigned int compute_hash(oop protection_domain) {
214 return (unsigned int)(protection_domain->identity_hash());
215 }
216
217 int index_for(oop protection_domain) {
218 return hash_to_index(compute_hash(protection_domain));
219 }
220
221 ProtectionDomainCacheEntry* add_entry(int index, unsigned int hash, oop protection_domain);
222 ProtectionDomainCacheEntry* find_entry(int index, oop protection_domain);
223
224 public:
225
226 ProtectionDomainCacheTable(int table_size);
227
228 ProtectionDomainCacheEntry* get(oop protection_domain);
229 void free(ProtectionDomainCacheEntry* entry);
230
231 // GC support
232 void oops_do(OopClosure* f);
233 void always_strong_oops_do(OopClosure* f);
234
235 static uint bucket_size();
236
237 void print() PRODUCT_RETURN;
238 void verify();
239 };
240
241
242 class ProtectionDomainEntry :public CHeapObj<mtClass> {
243 friend class VMStructs;
244 public:
245 ProtectionDomainEntry* _next;
246 ProtectionDomainCacheEntry* _pd_cache;
247
248 ProtectionDomainEntry(ProtectionDomainCacheEntry* pd_cache, ProtectionDomainEntry* next) {
249 _pd_cache = pd_cache;
250 _next = next;
251 _pd_cache->increment_refcount();
252 }
253
254 ProtectionDomainEntry* next() { return _next; }
255 oop protection_domain() { return _pd_cache->protection_domain(); }
256
257 ProtectionDomainCacheEntry * release_pd_cache() {
258 if (_pd_cache->decrement_refcount() == 0) {
259 return _pd_cache;
260 } else {
261 return NULL;
262 }
263 }
264 };
265
266 // An entry in the system dictionary, this describes a class as
267 // { Klass*, loader, protection_domain }.
268
269 class DictionaryEntry : public HashtableEntry<Klass*, mtClass> {
270 friend class VMStructs;
271 private:
272 // Contains the set of approved protection domains that can access
273 // this system dictionary entry.
274 ProtectionDomainEntry* _pd_set;
275 ClassLoaderData* _loader_data;
276
292 }
293
294 ClassLoaderData* loader_data() const { return _loader_data; }
295 void set_loader_data(ClassLoaderData* loader_data) { _loader_data = loader_data; }
296
297 ProtectionDomainEntry* pd_set() const { return _pd_set; }
298 void set_pd_set(ProtectionDomainEntry* pd_set) { _pd_set = pd_set; }
299
300 bool has_protection_domain() { return _pd_set != NULL; }
301
302 // Tells whether the initiating class' protection can access the this _klass
303 bool is_valid_protection_domain(Handle protection_domain) {
304 if (!ProtectionDomainVerification) return true;
305 if (!SystemDictionary::has_checkPackageAccess()) return true;
306
307 return protection_domain() == NULL
308 ? true
309 : contains_protection_domain(protection_domain());
310 }
311
312 void set_strongly_reachable() {
313 for (ProtectionDomainEntry* current = _pd_set;
314 current != NULL;
315 current = current->_next) {
316 current->_pd_cache->set_strongly_reachable();
317 }
318 }
319
320 void verify_protection_domain_set() {
321 for (ProtectionDomainEntry* current = _pd_set;
322 current != NULL;
323 current = current->_next) {
324 current->_pd_cache->protection_domain()->verify();
325 }
326 }
327
328 bool equals(Symbol* class_name, ClassLoaderData* loader_data) const {
329 Klass* klass = (Klass*)literal();
330 return (InstanceKlass::cast(klass)->name() == class_name &&
331 _loader_data == loader_data);
332 }
333
334 void print() {
335 int count = 0;
336 for (ProtectionDomainEntry* current = _pd_set;
|