41 // |
41 // |
42 // Routines in SymbolTable will initialize the reference count of a Symbol* before |
42 // Routines in SymbolTable will initialize the reference count of a Symbol* before |
43 // it becomes "managed" by TempNewSymbol instances. As a handle class, TempNewSymbol |
43 // it becomes "managed" by TempNewSymbol instances. As a handle class, TempNewSymbol |
44 // needs to maintain proper reference counting in context of copy semantics. |
44 // needs to maintain proper reference counting in context of copy semantics. |
45 // |
45 // |
46 // In SymbolTable, new_symbol() and lookup() will create a Symbol* if not already in the |
46 // In SymbolTable, new_symbol() will create a Symbol* if not already in the |
47 // symbol table and add to the symbol's reference count. |
47 // symbol table and add to the symbol's reference count. |
48 // probe() and lookup_only() will increment the refcount if symbol is found. |
48 // probe() and lookup_only() will increment the refcount if symbol is found. |
49 class TempNewSymbol : public StackObj { |
49 class TempNewSymbol : public StackObj { |
50 Symbol* _temp; |
50 Symbol* _temp; |
51 |
51 |
137 void mark_has_items_to_clean(); |
137 void mark_has_items_to_clean(); |
138 bool has_items_to_clean() const; |
138 bool has_items_to_clean() const; |
139 |
139 |
140 SymbolTable(); |
140 SymbolTable(); |
141 |
141 |
142 Symbol* allocate_symbol(const char* name, int len, bool c_heap, TRAPS); // Assumes no characters larger than 0x7F |
142 Symbol* allocate_symbol(const char* name, int len, bool c_heap); // Assumes no characters larger than 0x7F |
143 Symbol* do_lookup(const char* name, int len, uintx hash); |
143 Symbol* do_lookup(const char* name, int len, uintx hash); |
144 Symbol* do_add_if_needed(const char* name, int len, uintx hash, bool heap, TRAPS); |
144 Symbol* do_add_if_needed(const char* name, int len, uintx hash, bool heap); |
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145 |
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146 // lookup only, won't add. Also calculate hash. Used by the ClassfileParser. |
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147 static Symbol* lookup_only(const char* name, int len, unsigned int& hash); |
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148 static Symbol* lookup_only_unicode(const jchar* name, int len, unsigned int& hash); |
145 |
149 |
146 // Adding elements |
150 // Adding elements |
147 static void new_symbols(ClassLoaderData* loader_data, |
151 static void new_symbols(ClassLoaderData* loader_data, |
148 const constantPoolHandle& cp, int names_count, |
152 const constantPoolHandle& cp, int names_count, |
149 const char** name, int* lengths, |
153 const char** name, int* lengths, |
150 int* cp_indices, unsigned int* hashValues, |
154 int* cp_indices, unsigned int* hashValues); |
151 TRAPS); |
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152 |
155 |
153 static Symbol* lookup_shared(const char* name, int len, unsigned int hash); |
156 static Symbol* lookup_shared(const char* name, int len, unsigned int hash); |
154 Symbol* lookup_dynamic(const char* name, int len, unsigned int hash); |
157 Symbol* lookup_dynamic(const char* name, int len, unsigned int hash); |
155 Symbol* lookup_common(const char* name, int len, unsigned int hash); |
158 Symbol* lookup_common(const char* name, int len, unsigned int hash); |
156 |
159 |
188 static void do_concurrent_work(JavaThread* jt); |
191 static void do_concurrent_work(JavaThread* jt); |
189 static bool has_work() { return the_table()->_has_work; } |
192 static bool has_work() { return the_table()->_has_work; } |
190 static void trigger_cleanup(); |
193 static void trigger_cleanup(); |
191 |
194 |
192 // Probing |
195 // Probing |
193 static Symbol* lookup(const char* name, int len, TRAPS); |
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194 // lookup only, won't add. Also calculate hash. |
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195 static Symbol* lookup_only(const char* name, int len, unsigned int& hash); |
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196 // adds new symbol if not found |
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197 static Symbol* lookup(const Symbol* sym, int begin, int end, TRAPS); |
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198 // jchar (UTF16) version of lookups |
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199 static Symbol* lookup_unicode(const jchar* name, int len, TRAPS); |
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200 static Symbol* lookup_only_unicode(const jchar* name, int len, unsigned int& hash); |
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201 // Needed for preloading classes in signatures when compiling. |
196 // Needed for preloading classes in signatures when compiling. |
202 // Returns the symbol is already present in symbol table, otherwise |
197 // Returns the symbol is already present in symbol table, otherwise |
203 // NULL. NO ALLOCATION IS GUARANTEED! |
198 // NULL. NO ALLOCATION IS GUARANTEED! |
204 static Symbol* probe(const char* name, int len) { |
199 static Symbol* probe(const char* name, int len) { |
205 unsigned int ignore_hash; |
200 unsigned int ignore_hash; |
208 static Symbol* probe_unicode(const jchar* name, int len) { |
203 static Symbol* probe_unicode(const jchar* name, int len) { |
209 unsigned int ignore_hash; |
204 unsigned int ignore_hash; |
210 return lookup_only_unicode(name, len, ignore_hash); |
205 return lookup_only_unicode(name, len, ignore_hash); |
211 } |
206 } |
212 |
207 |
213 // Symbol creation |
208 // Symbol lookup and create if not found. |
214 static Symbol* new_symbol(const char* utf8_buffer, int length, TRAPS) { |
209 // jchar (UTF16) version of lookup |
215 assert(utf8_buffer != NULL, "just checking"); |
210 static Symbol* new_symbol(const jchar* name, int len); |
216 return lookup(utf8_buffer, length, THREAD); |
211 // char (UTF8) versions |
217 } |
212 static Symbol* new_symbol(const Symbol* sym, int begin, int end); |
218 static Symbol* new_symbol(const char* name, TRAPS) { |
213 static Symbol* new_symbol(const char* utf8_buffer, int length); |
219 return new_symbol(name, (int)strlen(name), THREAD); |
214 static Symbol* new_symbol(const char* name) { |
220 } |
215 return new_symbol(name, (int)strlen(name)); |
221 static Symbol* new_symbol(const Symbol* sym, int begin, int end, TRAPS) { |
216 } |
222 assert(begin <= end && end <= sym->utf8_length(), "just checking"); |
217 |
223 return lookup(sym, begin, end, THREAD); |
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224 } |
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225 // Create a symbol in the arena for symbols that are not deleted |
218 // Create a symbol in the arena for symbols that are not deleted |
226 static Symbol* new_permanent_symbol(const char* name, TRAPS); |
219 static Symbol* new_permanent_symbol(const char* name); |
227 |
220 |
228 // Rehash the string table if it gets out of balance |
221 // Rehash the string table if it gets out of balance |
229 static void rehash_table(); |
222 static void rehash_table(); |
230 static bool needs_rehashing() |
223 static bool needs_rehashing() |
231 { return SymbolTable::the_table()->_needs_rehashing; } |
224 { return SymbolTable::the_table()->_needs_rehashing; } |