1 /* 2 * Copyright (c) 1998, 2017, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 #ifndef SHARE_VM_OOPS_CPCACHEOOP_HPP 26 #define SHARE_VM_OOPS_CPCACHEOOP_HPP 27 28 #include "interpreter/bytecodes.hpp" 29 #include "memory/allocation.hpp" 30 #include "oops/array.hpp" 31 #include "oops/oopHandle.hpp" 32 #include "runtime/orderAccess.hpp" 33 #include "utilities/align.hpp" 34 35 class PSPromotionManager; 36 37 // The ConstantPoolCache is not a cache! It is the resolution table that the 38 // interpreter uses to avoid going into the runtime and a way to access resolved 39 // values. 40 41 // A ConstantPoolCacheEntry describes an individual entry of the constant 42 // pool cache. There's 2 principal kinds of entries: field entries for in- 43 // stance & static field access, and method entries for invokes. Some of 44 // the entry layout is shared and looks as follows: 45 // 46 // bit number |31 0| 47 // bit length |-8--|-8--|---16----| 48 // -------------------------------- 49 // _indices [ b2 | b1 | index ] index = constant_pool_index 50 // _f1 [ entry specific ] metadata ptr (method or klass) 51 // _f2 [ entry specific ] vtable or res_ref index, or vfinal method ptr 52 // _flags [tos|0|F=1|0|0|0|f|v|0 |0000|field_index] (for field entries) 53 // bit length [ 4 |1| 1 |1|1|1|1|1|1 |-4--|----16-----] 54 // _flags [tos|0|F=0|M|A|I|f|0|vf|0000|00000|psize] (for method entries) 55 // bit length [ 4 |1| 1 |1|1|1|1|1|1 |-4--|--8--|--8--] 56 57 // -------------------------------- 58 // 59 // with: 60 // index = original constant pool index 61 // b1 = bytecode 1 62 // b2 = bytecode 2 63 // psize = parameters size (method entries only) 64 // field_index = index into field information in holder InstanceKlass 65 // The index max is 0xffff (max number of fields in constant pool) 66 // and is multiplied by (InstanceKlass::next_offset) when accessing. 67 // tos = TosState 68 // F = the entry is for a field (or F=0 for a method) 69 // A = call site has an appendix argument (loaded from resolved references) 70 // I = interface call is forced virtual (must use a vtable index or vfinal) 71 // f = field or method is final 72 // v = field is volatile 73 // vf = virtual but final (method entries only: is_vfinal()) 74 // 75 // The flags after TosState have the following interpretation: 76 // bit 27: 0 for fields, 1 for methods 77 // f flag true if field is marked final 78 // v flag true if field is volatile (only for fields) 79 // f2 flag true if f2 contains an oop (e.g., virtual final method) 80 // fv flag true if invokeinterface used for method in class Object 81 // 82 // The flags 31, 30, 29, 28 together build a 4 bit number 0 to 16 with the 83 // following mapping to the TosState states: 84 // 85 // btos: 0 86 // ztos: 1 87 // ctos: 2 88 // stos: 3 89 // itos: 4 90 // ltos: 5 91 // ftos: 6 92 // dtos: 7 93 // atos: 8 94 // qtos: 9 95 // vtos: 10 96 // 97 // Entry specific: field entries: 98 // _indices = get (b1 section) and put (b2 section) bytecodes, original constant pool index 99 // _f1 = field holder (as a java.lang.Class, not a Klass*) 100 // _f2 = field offset in bytes 101 // _flags = field type information, original FieldInfo index in field holder 102 // (field_index section) 103 // 104 // Entry specific: method entries: 105 // _indices = invoke code for f1 (b1 section), invoke code for f2 (b2 section), 106 // original constant pool index 107 // _f1 = Method* for non-virtual calls, unused by virtual calls. 108 // for interface calls, which are essentially virtual but need a klass, 109 // contains Klass* for the corresponding interface. 110 // for invokedynamic and invokehandle, f1 contains the adapter method which 111 // manages the actual call. The appendix is stored in the ConstantPool 112 // resolved_references array. 113 // (upcoming metadata changes will move the appendix to a separate array) 114 // _f2 = vtable/itable index (or final Method*) for virtual calls only, 115 // unused by non-virtual. The is_vfinal flag indicates this is a 116 // method pointer for a final method, not an index. 117 // _flags = method type info (t section), 118 // virtual final bit (vfinal), 119 // parameter size (psize section) 120 // 121 // Note: invokevirtual & invokespecial bytecodes can share the same constant 122 // pool entry and thus the same constant pool cache entry. All invoke 123 // bytecodes but invokevirtual use only _f1 and the corresponding b1 124 // bytecode, while invokevirtual uses only _f2 and the corresponding 125 // b2 bytecode. The value of _flags is shared for both types of entries. 126 // 127 // The fields are volatile so that they are stored in the order written in the 128 // source code. The _indices field with the bytecode must be written last. 129 130 class CallInfo; 131 132 class ConstantPoolCacheEntry VALUE_OBJ_CLASS_SPEC { 133 friend class VMStructs; 134 friend class constantPoolCacheKlass; 135 friend class ConstantPool; 136 friend class InterpreterRuntime; 137 138 private: 139 volatile intx _indices; // constant pool index & rewrite bytecodes 140 volatile Metadata* _f1; // entry specific metadata field 141 volatile intx _f2; // entry specific int/metadata field 142 volatile intx _flags; // flags 143 144 145 void set_bytecode_1(Bytecodes::Code code); 146 void set_bytecode_2(Bytecodes::Code code); 147 void set_f1(Metadata* f1) { 148 Metadata* existing_f1 = (Metadata*)_f1; // read once 149 assert(existing_f1 == NULL || existing_f1 == f1, "illegal field change"); 150 _f1 = f1; 151 } 152 void release_set_f1(Metadata* f1); 153 void set_f2(intx f2) { 154 intx existing_f2 = _f2; // read once 155 assert(existing_f2 == 0 || existing_f2 == f2, "illegal field change"); 156 _f2 = f2; 157 } 158 void set_f2_as_vfinal_method(Method* f2) { 159 assert(is_vfinal(), "flags must be set"); 160 set_f2((intx)f2); 161 } 162 int make_flags(TosState state, int option_bits, int field_index_or_method_params); 163 void set_flags(intx flags) { _flags = flags; } 164 bool init_flags_atomic(intx flags); 165 void set_field_flags(TosState field_type, int option_bits, int field_index) { 166 assert((field_index & field_index_mask) == field_index, "field_index in range"); 167 set_flags(make_flags(field_type, option_bits | (1 << is_field_entry_shift), field_index)); 168 } 169 void set_method_flags(TosState return_type, int option_bits, int method_params) { 170 assert((method_params & parameter_size_mask) == method_params, "method_params in range"); 171 set_flags(make_flags(return_type, option_bits, method_params)); 172 } 173 bool init_method_flags_atomic(TosState return_type, int option_bits, int method_params) { 174 assert((method_params & parameter_size_mask) == method_params, "method_params in range"); 175 return init_flags_atomic(make_flags(return_type, option_bits, method_params)); 176 } 177 178 public: 179 // specific bit definitions for the flags field: 180 // (Note: the interpreter must use these definitions to access the CP cache.) 181 enum { 182 // high order bits are the TosState corresponding to field type or method return type 183 tos_state_bits = 4, 184 tos_state_mask = right_n_bits(tos_state_bits), 185 tos_state_shift = BitsPerInt - tos_state_bits, // see verify_tos_state_shift below 186 // misc. option bits; can be any bit position in [16..27] 187 is_field_entry_shift = 26, // (F) is it a field or a method? 188 has_method_type_shift = 25, // (M) does the call site have a MethodType? 189 has_appendix_shift = 24, // (A) does the call site have an appendix argument? 190 is_forced_virtual_shift = 23, // (I) is the interface reference forced to virtual mode? 191 is_final_shift = 22, // (f) is the field or method final? 192 is_volatile_shift = 21, // (v) is the field volatile? 193 is_vfinal_shift = 20, // (vf) did the call resolve to a final method? 194 // low order bits give field index (for FieldInfo) or method parameter size: 195 field_index_bits = 16, 196 field_index_mask = right_n_bits(field_index_bits), 197 parameter_size_bits = 8, // subset of field_index_mask, range is 0..255 198 parameter_size_mask = right_n_bits(parameter_size_bits), 199 option_bits_mask = ~(((~0u) << tos_state_shift) | (field_index_mask | parameter_size_mask)) 200 }; 201 202 // specific bit definitions for the indices field: 203 enum { 204 cp_index_bits = 2*BitsPerByte, 205 cp_index_mask = right_n_bits(cp_index_bits), 206 bytecode_1_shift = cp_index_bits, 207 bytecode_1_mask = right_n_bits(BitsPerByte), // == (u1)0xFF 208 bytecode_2_shift = cp_index_bits + BitsPerByte, 209 bytecode_2_mask = right_n_bits(BitsPerByte) // == (u1)0xFF 210 }; 211 212 213 // Initialization 214 void initialize_entry(int original_index); // initialize primary entry 215 void initialize_resolved_reference_index(int ref_index) { 216 assert(_f2 == 0, "set once"); // note: ref_index might be zero also 217 _f2 = ref_index; 218 } 219 220 void set_field( // sets entry to resolved field state 221 Bytecodes::Code get_code, // the bytecode used for reading the field 222 Bytecodes::Code put_code, // the bytecode used for writing the field 223 Klass* field_holder, // the object/klass holding the field 224 int orig_field_index, // the original field index in the field holder 225 int field_offset, // the field offset in words in the field holder 226 TosState field_type, // the (machine) field type 227 bool is_final, // the field is final 228 bool is_volatile, // the field is volatile 229 Klass* root_klass // needed by the GC to dirty the klass 230 ); 231 232 private: 233 void set_direct_or_vtable_call( 234 Bytecodes::Code invoke_code, // the bytecode used for invoking the method 235 const methodHandle& method, // the method/prototype if any (NULL, otherwise) 236 int vtable_index, // the vtable index if any, else negative 237 bool sender_is_interface 238 ); 239 240 public: 241 void set_direct_call( // sets entry to exact concrete method entry 242 Bytecodes::Code invoke_code, // the bytecode used for invoking the method 243 const methodHandle& method, // the method to call 244 bool sender_is_interface 245 ); 246 247 void set_vtable_call( // sets entry to vtable index 248 Bytecodes::Code invoke_code, // the bytecode used for invoking the method 249 const methodHandle& method, // resolved method which declares the vtable index 250 int vtable_index // the vtable index 251 ); 252 253 void set_itable_call( 254 Bytecodes::Code invoke_code, // the bytecode used; must be invokeinterface 255 const methodHandle& method, // the resolved interface method 256 int itable_index // index into itable for the method 257 ); 258 259 void set_method_handle( 260 const constantPoolHandle& cpool, // holding constant pool (required for locking) 261 const CallInfo &call_info // Call link information 262 ); 263 264 void set_dynamic_call( 265 const constantPoolHandle& cpool, // holding constant pool (required for locking) 266 const CallInfo &call_info // Call link information 267 ); 268 269 // Common code for invokedynamic and MH invocations. 270 271 // The "appendix" is an optional call-site-specific parameter which is 272 // pushed by the JVM at the end of the argument list. This argument may 273 // be a MethodType for the MH.invokes and a CallSite for an invokedynamic 274 // instruction. However, its exact type and use depends on the Java upcall, 275 // which simply returns a compiled LambdaForm along with any reference 276 // that LambdaForm needs to complete the call. If the upcall returns a 277 // null appendix, the argument is not passed at all. 278 // 279 // The appendix is *not* represented in the signature of the symbolic 280 // reference for the call site, but (if present) it *is* represented in 281 // the Method* bound to the site. This means that static and dynamic 282 // resolution logic needs to make slightly different assessments about the 283 // number and types of arguments. 284 void set_method_handle_common( 285 const constantPoolHandle& cpool, // holding constant pool (required for locking) 286 Bytecodes::Code invoke_code, // _invokehandle or _invokedynamic 287 const CallInfo &call_info // Call link information 288 ); 289 290 // invokedynamic and invokehandle call sites have two entries in the 291 // resolved references array: 292 // appendix (at index+0) 293 // MethodType (at index+1) 294 enum { 295 _indy_resolved_references_appendix_offset = 0, 296 _indy_resolved_references_method_type_offset = 1, 297 _indy_resolved_references_entries 298 }; 299 300 Method* method_if_resolved(const constantPoolHandle& cpool); 301 oop appendix_if_resolved(const constantPoolHandle& cpool); 302 oop method_type_if_resolved(const constantPoolHandle& cpool); 303 304 void set_parameter_size(int value); 305 306 // Which bytecode number (1 or 2) in the index field is valid for this bytecode? 307 // Returns -1 if neither is valid. 308 static int bytecode_number(Bytecodes::Code code) { 309 switch (code) { 310 case Bytecodes::_getstatic : // fall through 311 case Bytecodes::_getfield : // fall through 312 case Bytecodes::_invokespecial : // fall through 313 case Bytecodes::_invokestatic : // fall through 314 case Bytecodes::_invokehandle : // fall through 315 case Bytecodes::_invokedynamic : // fall through 316 case Bytecodes::_invokeinterface : return 1; 317 case Bytecodes::_putstatic : // fall through 318 case Bytecodes::_putfield : // fall through 319 case Bytecodes::_vwithfield : // fall through 320 case Bytecodes::_invokevirtual : return 2; 321 default : break; 322 } 323 return -1; 324 } 325 326 // Has this bytecode been resolved? Only valid for invokes and get/put field/static. 327 bool is_resolved(Bytecodes::Code code) const { 328 switch (bytecode_number(code)) { 329 case 1: return (bytecode_1() == code); 330 case 2: return (bytecode_2() == code); 331 } 332 return false; // default: not resolved 333 } 334 335 // Accessors 336 int indices() const { return _indices; } 337 int indices_ord() const { return (intx)OrderAccess::load_ptr_acquire(&_indices); } 338 int constant_pool_index() const { return (indices() & cp_index_mask); } 339 Bytecodes::Code bytecode_1() const { return Bytecodes::cast((indices_ord() >> bytecode_1_shift) & bytecode_1_mask); } 340 Bytecodes::Code bytecode_2() const { return Bytecodes::cast((indices_ord() >> bytecode_2_shift) & bytecode_2_mask); } 341 Metadata* f1_ord() const { return (Metadata *)OrderAccess::load_ptr_acquire(&_f1); } 342 Method* f1_as_method() const { Metadata* f1 = f1_ord(); assert(f1 == NULL || f1->is_method(), ""); return (Method*)f1; } 343 Klass* f1_as_klass() const { Metadata* f1 = f1_ord(); assert(f1 == NULL || f1->is_klass(), ""); return (Klass*)f1; } 344 // Use the accessor f1() to acquire _f1's value. This is needed for 345 // example in BytecodeInterpreter::run(), where is_f1_null() is 346 // called to check if an invokedynamic call is resolved. This load 347 // of _f1 must be ordered with the loads performed by 348 // cache->main_entry_index(). 349 bool is_f1_null() const { Metadata* f1 = f1_ord(); return f1 == NULL; } // classifies a CPC entry as unbound 350 int f2_as_index() const { assert(!is_vfinal(), ""); return (int) _f2; } 351 Method* f2_as_vfinal_method() const { assert(is_vfinal(), ""); return (Method*)_f2; } 352 int f2_as_offset() const { assert(is_field_entry(), ""); return (int)_f2; } 353 int field_index() const { assert(is_field_entry(), ""); return (_flags & field_index_mask); } 354 int parameter_size() const { assert(is_method_entry(), ""); return (_flags & parameter_size_mask); } 355 bool is_volatile() const { return (_flags & (1 << is_volatile_shift)) != 0; } 356 bool is_final() const { return (_flags & (1 << is_final_shift)) != 0; } 357 bool is_forced_virtual() const { return (_flags & (1 << is_forced_virtual_shift)) != 0; } 358 bool is_vfinal() const { return (_flags & (1 << is_vfinal_shift)) != 0; } 359 bool has_appendix() const { return (!is_f1_null()) && (_flags & (1 << has_appendix_shift)) != 0; } 360 bool has_method_type() const { return (!is_f1_null()) && (_flags & (1 << has_method_type_shift)) != 0; } 361 bool is_method_entry() const { return (_flags & (1 << is_field_entry_shift)) == 0; } 362 bool is_field_entry() const { return (_flags & (1 << is_field_entry_shift)) != 0; } 363 bool is_long() const { return flag_state() == ltos; } 364 bool is_double() const { return flag_state() == dtos; } 365 bool is_valuetype() const { return flag_state() == qtos; } 366 TosState flag_state() const { assert((uint)number_of_states <= (uint)tos_state_mask+1, ""); 367 return (TosState)((_flags >> tos_state_shift) & tos_state_mask); } 368 369 // Code generation support 370 static WordSize size() { 371 return in_WordSize(align_up((int)sizeof(ConstantPoolCacheEntry), wordSize) / wordSize); 372 } 373 static ByteSize size_in_bytes() { return in_ByteSize(sizeof(ConstantPoolCacheEntry)); } 374 static ByteSize indices_offset() { return byte_offset_of(ConstantPoolCacheEntry, _indices); } 375 static ByteSize f1_offset() { return byte_offset_of(ConstantPoolCacheEntry, _f1); } 376 static ByteSize f2_offset() { return byte_offset_of(ConstantPoolCacheEntry, _f2); } 377 static ByteSize flags_offset() { return byte_offset_of(ConstantPoolCacheEntry, _flags); } 378 379 #if INCLUDE_JVMTI 380 // RedefineClasses() API support: 381 // If this ConstantPoolCacheEntry refers to old_method then update it 382 // to refer to new_method. 383 // trace_name_printed is set to true if the current call has 384 // printed the klass name so that other routines in the adjust_* 385 // group don't print the klass name. 386 bool adjust_method_entry(Method* old_method, Method* new_method, 387 bool* trace_name_printed); 388 bool check_no_old_or_obsolete_entries(); 389 Method* get_interesting_method_entry(Klass* k); 390 #endif // INCLUDE_JVMTI 391 392 // Debugging & Printing 393 void print (outputStream* st, int index) const; 394 void verify(outputStream* st) const; 395 396 static void verify_tos_state_shift() { 397 // When shifting flags as a 32-bit int, make sure we don't need an extra mask for tos_state: 398 assert((((u4)-1 >> tos_state_shift) & ~tos_state_mask) == 0, "no need for tos_state mask"); 399 } 400 }; 401 402 403 // A constant pool cache is a runtime data structure set aside to a constant pool. The cache 404 // holds interpreter runtime information for all field access and invoke bytecodes. The cache 405 // is created and initialized before a class is actively used (i.e., initialized), the indivi- 406 // dual cache entries are filled at resolution (i.e., "link") time (see also: rewriter.*). 407 408 class ConstantPoolCache: public MetaspaceObj { 409 friend class VMStructs; 410 friend class MetadataFactory; 411 private: 412 // If you add a new field that points to any metaspace object, you 413 // must add this field to ConstantPoolCache::metaspace_pointers_do(). 414 int _length; 415 ConstantPool* _constant_pool; // the corresponding constant pool 416 417 // The following fields need to be modified at runtime, so they cannot be 418 // stored in the ConstantPool, which is read-only. 419 // Array of resolved objects from the constant pool and map from resolved 420 // object index to original constant pool index 421 OopHandle _resolved_references; 422 Array<u2>* _reference_map; 423 // The narrowOop pointer to the archived resolved_references. Set at CDS dump 424 // time when caching java heap object is supported. 425 CDS_JAVA_HEAP_ONLY(narrowOop _archived_references;) 426 427 // Sizing 428 debug_only(friend class ClassVerifier;) 429 430 // Constructor 431 ConstantPoolCache(int length, 432 const intStack& inverse_index_map, 433 const intStack& invokedynamic_inverse_index_map, 434 const intStack& invokedynamic_references_map) : 435 _length(length), 436 _constant_pool(NULL) { 437 CDS_JAVA_HEAP_ONLY(_archived_references = 0;) 438 initialize(inverse_index_map, invokedynamic_inverse_index_map, 439 invokedynamic_references_map); 440 for (int i = 0; i < length; i++) { 441 assert(entry_at(i)->is_f1_null(), "Failed to clear?"); 442 } 443 } 444 445 // Initialization 446 void initialize(const intArray& inverse_index_map, 447 const intArray& invokedynamic_inverse_index_map, 448 const intArray& invokedynamic_references_map); 449 public: 450 static ConstantPoolCache* allocate(ClassLoaderData* loader_data, 451 const intStack& cp_cache_map, 452 const intStack& invokedynamic_cp_cache_map, 453 const intStack& invokedynamic_references_map, TRAPS); 454 bool is_constantPoolCache() const { return true; } 455 456 int length() const { return _length; } 457 void metaspace_pointers_do(MetaspaceClosure* it); 458 MetaspaceObj::Type type() const { return ConstantPoolCacheType; } 459 460 oop archived_references() NOT_CDS_JAVA_HEAP_RETURN_(NULL); 461 void set_archived_references(oop o) NOT_CDS_JAVA_HEAP_RETURN; 462 463 oop resolved_references() { return _resolved_references.resolve(); } 464 void set_resolved_references(OopHandle s) { _resolved_references = s; } 465 Array<u2>* reference_map() const { return _reference_map; } 466 void set_reference_map(Array<u2>* o) { _reference_map = o; } 467 468 // Assembly code support 469 static int resolved_references_offset_in_bytes() { return offset_of(ConstantPoolCache, _resolved_references); } 470 471 private: 472 void set_length(int length) { _length = length; } 473 474 static int header_size() { return sizeof(ConstantPoolCache) / wordSize; } 475 static int size(int length) { return align_metadata_size(header_size() + length * in_words(ConstantPoolCacheEntry::size())); } 476 public: 477 int size() const { return size(length()); } 478 private: 479 480 // Helpers 481 ConstantPool** constant_pool_addr() { return &_constant_pool; } 482 ConstantPoolCacheEntry* base() const { return (ConstantPoolCacheEntry*)((address)this + in_bytes(base_offset())); } 483 484 friend class constantPoolCacheKlass; 485 friend class ConstantPoolCacheEntry; 486 487 public: 488 // Accessors 489 void set_constant_pool(ConstantPool* pool) { _constant_pool = pool; } 490 ConstantPool* constant_pool() const { return _constant_pool; } 491 // Fetches the entry at the given index. 492 // In either case the index must not be encoded or byte-swapped in any way. 493 ConstantPoolCacheEntry* entry_at(int i) const { 494 assert(0 <= i && i < length(), "index out of bounds"); 495 return base() + i; 496 } 497 498 // Code generation 499 static ByteSize base_offset() { return in_ByteSize(sizeof(ConstantPoolCache)); } 500 static ByteSize entry_offset(int raw_index) { 501 int index = raw_index; 502 return (base_offset() + ConstantPoolCacheEntry::size_in_bytes() * index); 503 } 504 505 #if INCLUDE_JVMTI 506 // RedefineClasses() API support: 507 // If any entry of this ConstantPoolCache points to any of 508 // old_methods, replace it with the corresponding new_method. 509 // trace_name_printed is set to true if the current call has 510 // printed the klass name so that other routines in the adjust_* 511 // group don't print the klass name. 512 void adjust_method_entries(InstanceKlass* holder, bool* trace_name_printed); 513 bool check_no_old_or_obsolete_entries(); 514 void dump_cache(); 515 #endif // INCLUDE_JVMTI 516 517 // Deallocate - no fields to deallocate 518 DEBUG_ONLY(bool on_stack() { return false; }) 519 void deallocate_contents(ClassLoaderData* data) {} 520 bool is_klass() const { return false; } 521 522 // Printing 523 void print_on(outputStream* st) const; 524 void print_value_on(outputStream* st) const; 525 526 const char* internal_name() const { return "{constant pool cache}"; } 527 528 // Verify 529 void verify_on(outputStream* st); 530 }; 531 532 #endif // SHARE_VM_OOPS_CPCACHEOOP_HPP