Wed, 03 Jul 2019 20:42:37 +0800
Merge
aoqi@0 | 1 | /* |
tschatzl@8766 | 2 | * Copyright (c) 1997, 2017, Oracle and/or its affiliates. All rights reserved. |
aoqi@0 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
aoqi@0 | 4 | * |
aoqi@0 | 5 | * This code is free software; you can redistribute it and/or modify it |
aoqi@0 | 6 | * under the terms of the GNU General Public License version 2 only, as |
aoqi@0 | 7 | * published by the Free Software Foundation. |
aoqi@0 | 8 | * |
aoqi@0 | 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
aoqi@0 | 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
aoqi@0 | 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
aoqi@0 | 12 | * version 2 for more details (a copy is included in the LICENSE file that |
aoqi@0 | 13 | * accompanied this code). |
aoqi@0 | 14 | * |
aoqi@0 | 15 | * You should have received a copy of the GNU General Public License version |
aoqi@0 | 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
aoqi@0 | 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
aoqi@0 | 18 | * |
aoqi@0 | 19 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
aoqi@0 | 20 | * or visit www.oracle.com if you need additional information or have any |
aoqi@0 | 21 | * questions. |
aoqi@0 | 22 | * |
aoqi@0 | 23 | */ |
aoqi@0 | 24 | |
aoqi@0 | 25 | #ifndef SHARE_VM_CLASSFILE_SYMBOLTABLE_HPP |
aoqi@0 | 26 | #define SHARE_VM_CLASSFILE_SYMBOLTABLE_HPP |
aoqi@0 | 27 | |
aoqi@0 | 28 | #include "memory/allocation.inline.hpp" |
aoqi@0 | 29 | #include "oops/symbol.hpp" |
aoqi@0 | 30 | #include "utilities/hashtable.hpp" |
aoqi@0 | 31 | |
aoqi@0 | 32 | // The symbol table holds all Symbol*s and corresponding interned strings. |
aoqi@0 | 33 | // Symbol*s and literal strings should be canonicalized. |
aoqi@0 | 34 | // |
aoqi@0 | 35 | // The interned strings are created lazily. |
aoqi@0 | 36 | // |
aoqi@0 | 37 | // It is implemented as an open hash table with a fixed number of buckets. |
aoqi@0 | 38 | // |
aoqi@0 | 39 | // %note: |
aoqi@0 | 40 | // - symbolTableEntrys are allocated in blocks to reduce the space overhead. |
aoqi@0 | 41 | |
aoqi@0 | 42 | class BoolObjectClosure; |
aoqi@0 | 43 | class outputStream; |
aoqi@0 | 44 | |
aoqi@0 | 45 | |
aoqi@0 | 46 | // Class to hold a newly created or referenced Symbol* temporarily in scope. |
aoqi@0 | 47 | // new_symbol() and lookup() will create a Symbol* if not already in the |
aoqi@0 | 48 | // symbol table and add to the symbol's reference count. |
aoqi@0 | 49 | // probe() and lookup_only() will increment the refcount if symbol is found. |
aoqi@0 | 50 | class TempNewSymbol : public StackObj { |
aoqi@0 | 51 | Symbol* _temp; |
aoqi@0 | 52 | |
aoqi@0 | 53 | public: |
aoqi@0 | 54 | TempNewSymbol() : _temp(NULL) {} |
aoqi@0 | 55 | // Creating or looking up a symbol increments the symbol's reference count |
aoqi@0 | 56 | TempNewSymbol(Symbol *s) : _temp(s) {} |
aoqi@0 | 57 | |
aoqi@0 | 58 | // Operator= increments reference count. |
aoqi@0 | 59 | void operator=(const TempNewSymbol &s) { |
aoqi@0 | 60 | //clear(); //FIXME |
aoqi@0 | 61 | _temp = s._temp; |
aoqi@0 | 62 | if (_temp !=NULL) _temp->increment_refcount(); |
aoqi@0 | 63 | } |
aoqi@0 | 64 | |
aoqi@0 | 65 | // Decrement reference counter so it can go away if it's unique |
aoqi@0 | 66 | void clear() { if (_temp != NULL) _temp->decrement_refcount(); _temp = NULL; } |
aoqi@0 | 67 | |
aoqi@0 | 68 | ~TempNewSymbol() { clear(); } |
aoqi@0 | 69 | |
aoqi@0 | 70 | // Operators so they can be used like Symbols |
aoqi@0 | 71 | Symbol* operator -> () const { return _temp; } |
aoqi@0 | 72 | bool operator == (Symbol* o) const { return _temp == o; } |
aoqi@0 | 73 | // Sneaky conversion function |
aoqi@0 | 74 | operator Symbol*() { return _temp; } |
aoqi@0 | 75 | }; |
aoqi@0 | 76 | |
mgerdin@7207 | 77 | class SymbolTable : public RehashableHashtable<Symbol*, mtSymbol> { |
aoqi@0 | 78 | friend class VMStructs; |
aoqi@0 | 79 | friend class ClassFileParser; |
aoqi@0 | 80 | |
aoqi@0 | 81 | private: |
aoqi@0 | 82 | // The symbol table |
aoqi@0 | 83 | static SymbolTable* _the_table; |
aoqi@0 | 84 | |
aoqi@0 | 85 | // Set if one bucket is out of balance due to hash algorithm deficiency |
aoqi@0 | 86 | static bool _needs_rehashing; |
aoqi@0 | 87 | |
aoqi@0 | 88 | // For statistics |
aoqi@0 | 89 | static int _symbols_removed; |
aoqi@0 | 90 | static int _symbols_counted; |
aoqi@0 | 91 | |
aoqi@0 | 92 | Symbol* allocate_symbol(const u1* name, int len, bool c_heap, TRAPS); // Assumes no characters larger than 0x7F |
aoqi@0 | 93 | |
aoqi@0 | 94 | // Adding elements |
aoqi@0 | 95 | Symbol* basic_add(int index, u1* name, int len, unsigned int hashValue, |
aoqi@0 | 96 | bool c_heap, TRAPS); |
aoqi@0 | 97 | bool basic_add(ClassLoaderData* loader_data, |
aoqi@0 | 98 | constantPoolHandle cp, int names_count, |
aoqi@0 | 99 | const char** names, int* lengths, int* cp_indices, |
aoqi@0 | 100 | unsigned int* hashValues, TRAPS); |
aoqi@0 | 101 | |
aoqi@0 | 102 | static void new_symbols(ClassLoaderData* loader_data, |
aoqi@0 | 103 | constantPoolHandle cp, int names_count, |
aoqi@0 | 104 | const char** name, int* lengths, |
aoqi@0 | 105 | int* cp_indices, unsigned int* hashValues, |
aoqi@0 | 106 | TRAPS) { |
aoqi@0 | 107 | add(loader_data, cp, names_count, name, lengths, cp_indices, hashValues, THREAD); |
aoqi@0 | 108 | } |
aoqi@0 | 109 | |
aoqi@0 | 110 | Symbol* lookup(int index, const char* name, int len, unsigned int hash); |
aoqi@0 | 111 | |
aoqi@0 | 112 | SymbolTable() |
mgerdin@7207 | 113 | : RehashableHashtable<Symbol*, mtSymbol>(SymbolTableSize, sizeof (HashtableEntry<Symbol*, mtSymbol>)) {} |
aoqi@0 | 114 | |
aoqi@0 | 115 | SymbolTable(HashtableBucket<mtSymbol>* t, int number_of_entries) |
mgerdin@7207 | 116 | : RehashableHashtable<Symbol*, mtSymbol>(SymbolTableSize, sizeof (HashtableEntry<Symbol*, mtSymbol>), t, |
aoqi@0 | 117 | number_of_entries) {} |
aoqi@0 | 118 | |
aoqi@0 | 119 | // Arena for permanent symbols (null class loader) that are never unloaded |
aoqi@0 | 120 | static Arena* _arena; |
aoqi@0 | 121 | static Arena* arena() { return _arena; } // called for statistics |
aoqi@0 | 122 | |
aoqi@0 | 123 | static void initialize_symbols(int arena_alloc_size = 0); |
aoqi@0 | 124 | |
aoqi@0 | 125 | static volatile int _parallel_claimed_idx; |
aoqi@0 | 126 | |
tschatzl@8766 | 127 | typedef SymbolTable::BucketUnlinkContext BucketUnlinkContext; |
tschatzl@8766 | 128 | // Release any dead symbols. Unlinked bucket entries are collected in the given |
tschatzl@8766 | 129 | // context to be freed later. |
tschatzl@8766 | 130 | // This allows multiple threads to work on the table at once. |
tschatzl@8766 | 131 | static void buckets_unlink(int start_idx, int end_idx, BucketUnlinkContext* context, size_t* memory_total); |
aoqi@0 | 132 | public: |
aoqi@0 | 133 | enum { |
aoqi@0 | 134 | symbol_alloc_batch_size = 8, |
aoqi@0 | 135 | // Pick initial size based on java -version size measurements |
aoqi@0 | 136 | symbol_alloc_arena_size = 360*K |
aoqi@0 | 137 | }; |
aoqi@0 | 138 | |
aoqi@0 | 139 | // The symbol table |
aoqi@0 | 140 | static SymbolTable* the_table() { return _the_table; } |
aoqi@0 | 141 | |
aoqi@0 | 142 | // Size of one bucket in the string table. Used when checking for rollover. |
aoqi@0 | 143 | static uint bucket_size() { return sizeof(HashtableBucket<mtSymbol>); } |
aoqi@0 | 144 | |
aoqi@0 | 145 | static void create_table() { |
aoqi@0 | 146 | assert(_the_table == NULL, "One symbol table allowed."); |
aoqi@0 | 147 | _the_table = new SymbolTable(); |
aoqi@0 | 148 | initialize_symbols(symbol_alloc_arena_size); |
aoqi@0 | 149 | } |
aoqi@0 | 150 | |
aoqi@0 | 151 | static void create_table(HashtableBucket<mtSymbol>* t, int length, |
aoqi@0 | 152 | int number_of_entries) { |
aoqi@0 | 153 | assert(_the_table == NULL, "One symbol table allowed."); |
aoqi@0 | 154 | |
aoqi@0 | 155 | // If CDS archive used a different symbol table size, use that size instead |
aoqi@0 | 156 | // which is better than giving an error. |
aoqi@0 | 157 | SymbolTableSize = length/bucket_size(); |
aoqi@0 | 158 | |
aoqi@0 | 159 | _the_table = new SymbolTable(t, number_of_entries); |
aoqi@0 | 160 | // if CDS give symbol table a default arena size since most symbols |
aoqi@0 | 161 | // are already allocated in the shared misc section. |
aoqi@0 | 162 | initialize_symbols(); |
aoqi@0 | 163 | } |
aoqi@0 | 164 | |
aoqi@0 | 165 | static unsigned int hash_symbol(const char* s, int len); |
aoqi@0 | 166 | |
aoqi@0 | 167 | static Symbol* lookup(const char* name, int len, TRAPS); |
aoqi@0 | 168 | // lookup only, won't add. Also calculate hash. |
aoqi@0 | 169 | static Symbol* lookup_only(const char* name, int len, unsigned int& hash); |
aoqi@0 | 170 | // Only copy to C string to be added if lookup failed. |
aoqi@0 | 171 | static Symbol* lookup(const Symbol* sym, int begin, int end, TRAPS); |
aoqi@0 | 172 | |
aoqi@0 | 173 | static void release(Symbol* sym); |
aoqi@0 | 174 | |
aoqi@0 | 175 | // Look up the address of the literal in the SymbolTable for this Symbol* |
aoqi@0 | 176 | static Symbol** lookup_symbol_addr(Symbol* sym); |
aoqi@0 | 177 | |
aoqi@0 | 178 | // jchar (utf16) version of lookups |
aoqi@0 | 179 | static Symbol* lookup_unicode(const jchar* name, int len, TRAPS); |
aoqi@0 | 180 | static Symbol* lookup_only_unicode(const jchar* name, int len, unsigned int& hash); |
aoqi@0 | 181 | |
aoqi@0 | 182 | static void add(ClassLoaderData* loader_data, |
aoqi@0 | 183 | constantPoolHandle cp, int names_count, |
aoqi@0 | 184 | const char** names, int* lengths, int* cp_indices, |
aoqi@0 | 185 | unsigned int* hashValues, TRAPS); |
aoqi@0 | 186 | |
aoqi@0 | 187 | // Release any dead symbols |
aoqi@0 | 188 | static void unlink() { |
aoqi@0 | 189 | int processed = 0; |
aoqi@0 | 190 | int removed = 0; |
aoqi@0 | 191 | unlink(&processed, &removed); |
aoqi@0 | 192 | } |
aoqi@0 | 193 | static void unlink(int* processed, int* removed); |
aoqi@0 | 194 | // Release any dead symbols, possibly parallel version |
aoqi@0 | 195 | static void possibly_parallel_unlink(int* processed, int* removed); |
aoqi@0 | 196 | |
aoqi@0 | 197 | // iterate over symbols |
aoqi@0 | 198 | static void symbols_do(SymbolClosure *cl); |
aoqi@0 | 199 | |
aoqi@0 | 200 | // Symbol creation |
aoqi@0 | 201 | static Symbol* new_symbol(const char* utf8_buffer, int length, TRAPS) { |
aoqi@0 | 202 | assert(utf8_buffer != NULL, "just checking"); |
aoqi@0 | 203 | return lookup(utf8_buffer, length, THREAD); |
aoqi@0 | 204 | } |
aoqi@0 | 205 | static Symbol* new_symbol(const char* name, TRAPS) { |
aoqi@0 | 206 | return new_symbol(name, (int)strlen(name), THREAD); |
aoqi@0 | 207 | } |
aoqi@0 | 208 | static Symbol* new_symbol(const Symbol* sym, int begin, int end, TRAPS) { |
aoqi@0 | 209 | assert(begin <= end && end <= sym->utf8_length(), "just checking"); |
aoqi@0 | 210 | return lookup(sym, begin, end, THREAD); |
aoqi@0 | 211 | } |
aoqi@0 | 212 | |
aoqi@0 | 213 | // Create a symbol in the arena for symbols that are not deleted |
aoqi@0 | 214 | static Symbol* new_permanent_symbol(const char* name, TRAPS); |
aoqi@0 | 215 | |
aoqi@0 | 216 | // Symbol lookup |
aoqi@0 | 217 | static Symbol* lookup(int index, const char* name, int len, TRAPS); |
aoqi@0 | 218 | |
aoqi@0 | 219 | // Needed for preloading classes in signatures when compiling. |
aoqi@0 | 220 | // Returns the symbol is already present in symbol table, otherwise |
aoqi@0 | 221 | // NULL. NO ALLOCATION IS GUARANTEED! |
aoqi@0 | 222 | static Symbol* probe(const char* name, int len) { |
aoqi@0 | 223 | unsigned int ignore_hash; |
aoqi@0 | 224 | return lookup_only(name, len, ignore_hash); |
aoqi@0 | 225 | } |
aoqi@0 | 226 | static Symbol* probe_unicode(const jchar* name, int len) { |
aoqi@0 | 227 | unsigned int ignore_hash; |
aoqi@0 | 228 | return lookup_only_unicode(name, len, ignore_hash); |
aoqi@0 | 229 | } |
aoqi@0 | 230 | |
aoqi@0 | 231 | // Histogram |
aoqi@0 | 232 | static void print_histogram() PRODUCT_RETURN; |
aoqi@0 | 233 | static void print() PRODUCT_RETURN; |
aoqi@0 | 234 | |
aoqi@0 | 235 | // Debugging |
aoqi@0 | 236 | static void verify(); |
aoqi@0 | 237 | static void dump(outputStream* st); |
aoqi@0 | 238 | |
aoqi@0 | 239 | // Sharing |
aoqi@0 | 240 | static void copy_buckets(char** top, char*end) { |
aoqi@0 | 241 | the_table()->Hashtable<Symbol*, mtSymbol>::copy_buckets(top, end); |
aoqi@0 | 242 | } |
aoqi@0 | 243 | static void copy_table(char** top, char*end) { |
aoqi@0 | 244 | the_table()->Hashtable<Symbol*, mtSymbol>::copy_table(top, end); |
aoqi@0 | 245 | } |
aoqi@0 | 246 | static void reverse(void* boundary = NULL) { |
aoqi@0 | 247 | the_table()->Hashtable<Symbol*, mtSymbol>::reverse(boundary); |
aoqi@0 | 248 | } |
aoqi@0 | 249 | |
aoqi@0 | 250 | // Rehash the symbol table if it gets out of balance |
aoqi@0 | 251 | static void rehash_table(); |
aoqi@0 | 252 | static bool needs_rehashing() { return _needs_rehashing; } |
aoqi@0 | 253 | // Parallel chunked scanning |
aoqi@0 | 254 | static void clear_parallel_claimed_index() { _parallel_claimed_idx = 0; } |
aoqi@0 | 255 | static int parallel_claimed_index() { return _parallel_claimed_idx; } |
aoqi@0 | 256 | }; |
aoqi@0 | 257 | |
mgerdin@7207 | 258 | class StringTable : public RehashableHashtable<oop, mtSymbol> { |
aoqi@0 | 259 | friend class VMStructs; |
aoqi@0 | 260 | |
aoqi@0 | 261 | private: |
aoqi@0 | 262 | // The string table |
aoqi@0 | 263 | static StringTable* _the_table; |
aoqi@0 | 264 | |
aoqi@0 | 265 | // Set if one bucket is out of balance due to hash algorithm deficiency |
aoqi@0 | 266 | static bool _needs_rehashing; |
aoqi@0 | 267 | |
aoqi@0 | 268 | // Claimed high water mark for parallel chunked scanning |
aoqi@0 | 269 | static volatile int _parallel_claimed_idx; |
aoqi@0 | 270 | |
aoqi@0 | 271 | static oop intern(Handle string_or_null, jchar* chars, int length, TRAPS); |
aoqi@0 | 272 | oop basic_add(int index, Handle string_or_null, jchar* name, int len, |
aoqi@0 | 273 | unsigned int hashValue, TRAPS); |
aoqi@0 | 274 | |
aoqi@0 | 275 | oop lookup(int index, jchar* chars, int length, unsigned int hashValue); |
aoqi@0 | 276 | |
aoqi@0 | 277 | // Apply the give oop closure to the entries to the buckets |
aoqi@0 | 278 | // in the range [start_idx, end_idx). |
aoqi@0 | 279 | static void buckets_oops_do(OopClosure* f, int start_idx, int end_idx); |
tschatzl@8766 | 280 | |
tschatzl@8766 | 281 | typedef StringTable::BucketUnlinkContext BucketUnlinkContext; |
aoqi@0 | 282 | // Unlink or apply the give oop closure to the entries to the buckets |
tschatzl@8766 | 283 | // in the range [start_idx, end_idx). Unlinked bucket entries are collected in the given |
tschatzl@8766 | 284 | // context to be freed later. |
tschatzl@8766 | 285 | // This allows multiple threads to work on the table at once. |
tschatzl@8766 | 286 | static void buckets_unlink_or_oops_do(BoolObjectClosure* is_alive, OopClosure* f, int start_idx, int end_idx, BucketUnlinkContext* context); |
aoqi@0 | 287 | |
mgerdin@7207 | 288 | StringTable() : RehashableHashtable<oop, mtSymbol>((int)StringTableSize, |
aoqi@0 | 289 | sizeof (HashtableEntry<oop, mtSymbol>)) {} |
aoqi@0 | 290 | |
aoqi@0 | 291 | StringTable(HashtableBucket<mtSymbol>* t, int number_of_entries) |
mgerdin@7207 | 292 | : RehashableHashtable<oop, mtSymbol>((int)StringTableSize, sizeof (HashtableEntry<oop, mtSymbol>), t, |
aoqi@0 | 293 | number_of_entries) {} |
aoqi@0 | 294 | public: |
aoqi@0 | 295 | // The string table |
aoqi@0 | 296 | static StringTable* the_table() { return _the_table; } |
aoqi@0 | 297 | |
aoqi@0 | 298 | // Size of one bucket in the string table. Used when checking for rollover. |
aoqi@0 | 299 | static uint bucket_size() { return sizeof(HashtableBucket<mtSymbol>); } |
aoqi@0 | 300 | |
aoqi@0 | 301 | static void create_table() { |
aoqi@0 | 302 | assert(_the_table == NULL, "One string table allowed."); |
aoqi@0 | 303 | _the_table = new StringTable(); |
aoqi@0 | 304 | } |
aoqi@0 | 305 | |
aoqi@0 | 306 | // GC support |
aoqi@0 | 307 | // Delete pointers to otherwise-unreachable objects. |
aoqi@0 | 308 | static void unlink_or_oops_do(BoolObjectClosure* cl, OopClosure* f) { |
aoqi@0 | 309 | int processed = 0; |
aoqi@0 | 310 | int removed = 0; |
aoqi@0 | 311 | unlink_or_oops_do(cl, f, &processed, &removed); |
aoqi@0 | 312 | } |
aoqi@0 | 313 | static void unlink(BoolObjectClosure* cl) { |
aoqi@0 | 314 | int processed = 0; |
aoqi@0 | 315 | int removed = 0; |
aoqi@0 | 316 | unlink_or_oops_do(cl, NULL, &processed, &removed); |
aoqi@0 | 317 | } |
aoqi@0 | 318 | static void unlink_or_oops_do(BoolObjectClosure* cl, OopClosure* f, int* processed, int* removed); |
aoqi@0 | 319 | static void unlink(BoolObjectClosure* cl, int* processed, int* removed) { |
aoqi@0 | 320 | unlink_or_oops_do(cl, NULL, processed, removed); |
aoqi@0 | 321 | } |
aoqi@0 | 322 | // Serially invoke "f->do_oop" on the locations of all oops in the table. |
aoqi@0 | 323 | static void oops_do(OopClosure* f); |
aoqi@0 | 324 | |
aoqi@0 | 325 | // Possibly parallel versions of the above |
aoqi@0 | 326 | static void possibly_parallel_unlink_or_oops_do(BoolObjectClosure* cl, OopClosure* f, int* processed, int* removed); |
aoqi@0 | 327 | static void possibly_parallel_unlink(BoolObjectClosure* cl, int* processed, int* removed) { |
aoqi@0 | 328 | possibly_parallel_unlink_or_oops_do(cl, NULL, processed, removed); |
aoqi@0 | 329 | } |
aoqi@0 | 330 | static void possibly_parallel_oops_do(OopClosure* f); |
aoqi@0 | 331 | |
aoqi@0 | 332 | // Hashing algorithm, used as the hash value used by the |
aoqi@0 | 333 | // StringTable for bucket selection and comparison (stored in the |
aoqi@0 | 334 | // HashtableEntry structures). This is used in the String.intern() method. |
aoqi@0 | 335 | static unsigned int hash_string(const jchar* s, int len); |
aoqi@0 | 336 | |
aoqi@0 | 337 | // Internal test. |
aoqi@0 | 338 | static void test_alt_hash() PRODUCT_RETURN; |
aoqi@0 | 339 | |
aoqi@0 | 340 | // Probing |
aoqi@0 | 341 | static oop lookup(Symbol* symbol); |
aoqi@0 | 342 | static oop lookup(jchar* chars, int length); |
aoqi@0 | 343 | |
aoqi@0 | 344 | // Interning |
aoqi@0 | 345 | static oop intern(Symbol* symbol, TRAPS); |
aoqi@0 | 346 | static oop intern(oop string, TRAPS); |
aoqi@0 | 347 | static oop intern(const char *utf8_string, TRAPS); |
aoqi@0 | 348 | |
aoqi@0 | 349 | // Debugging |
aoqi@0 | 350 | static void verify(); |
aoqi@0 | 351 | static void dump(outputStream* st); |
aoqi@0 | 352 | |
aoqi@0 | 353 | enum VerifyMesgModes { |
aoqi@0 | 354 | _verify_quietly = 0, |
aoqi@0 | 355 | _verify_with_mesgs = 1 |
aoqi@0 | 356 | }; |
aoqi@0 | 357 | |
aoqi@0 | 358 | enum VerifyRetTypes { |
aoqi@0 | 359 | _verify_pass = 0, |
aoqi@0 | 360 | _verify_fail_continue = 1, |
aoqi@0 | 361 | _verify_fail_done = 2 |
aoqi@0 | 362 | }; |
aoqi@0 | 363 | |
aoqi@0 | 364 | static VerifyRetTypes compare_entries(int bkt1, int e_cnt1, |
aoqi@0 | 365 | HashtableEntry<oop, mtSymbol>* e_ptr1, |
aoqi@0 | 366 | int bkt2, int e_cnt2, |
aoqi@0 | 367 | HashtableEntry<oop, mtSymbol>* e_ptr2); |
aoqi@0 | 368 | static VerifyRetTypes verify_entry(int bkt, int e_cnt, |
aoqi@0 | 369 | HashtableEntry<oop, mtSymbol>* e_ptr, |
aoqi@0 | 370 | VerifyMesgModes mesg_mode); |
aoqi@0 | 371 | static int verify_and_compare_entries(); |
aoqi@0 | 372 | |
aoqi@0 | 373 | // Sharing |
aoqi@0 | 374 | static void copy_buckets(char** top, char*end) { |
aoqi@0 | 375 | the_table()->Hashtable<oop, mtSymbol>::copy_buckets(top, end); |
aoqi@0 | 376 | } |
aoqi@0 | 377 | static void copy_table(char** top, char*end) { |
aoqi@0 | 378 | the_table()->Hashtable<oop, mtSymbol>::copy_table(top, end); |
aoqi@0 | 379 | } |
aoqi@0 | 380 | static void reverse() { |
aoqi@0 | 381 | the_table()->Hashtable<oop, mtSymbol>::reverse(); |
aoqi@0 | 382 | } |
aoqi@0 | 383 | |
aoqi@0 | 384 | // Rehash the symbol table if it gets out of balance |
aoqi@0 | 385 | static void rehash_table(); |
aoqi@0 | 386 | static bool needs_rehashing() { return _needs_rehashing; } |
aoqi@0 | 387 | |
aoqi@0 | 388 | // Parallel chunked scanning |
aoqi@0 | 389 | static void clear_parallel_claimed_index() { _parallel_claimed_idx = 0; } |
aoqi@0 | 390 | static int parallel_claimed_index() { return _parallel_claimed_idx; } |
aoqi@0 | 391 | }; |
aoqi@0 | 392 | #endif // SHARE_VM_CLASSFILE_SYMBOLTABLE_HPP |