1 /* 2 * Copyright (c) 1997, 2014, 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 #include "precompiled.hpp" 26 #include "classfile/vmSymbols.hpp" 27 #include "memory/oopFactory.hpp" 28 #include "oops/oop.inline.hpp" 29 #include "runtime/handles.inline.hpp" 30 #include "utilities/xmlstream.hpp" 31 32 33 Symbol* vmSymbols::_symbols[vmSymbols::SID_LIMIT]; 34 35 Symbol* vmSymbols::_type_signatures[T_VOID+1] = { NULL /*, NULL...*/ }; 36 37 inline int compare_symbol(Symbol* a, Symbol* b) { 38 if (a == b) return 0; 39 // follow the natural address order: 40 return (address)a > (address)b ? +1 : -1; 41 } 42 43 static vmSymbols::SID vm_symbol_index[vmSymbols::SID_LIMIT]; 44 extern "C" { 45 static int compare_vmsymbol_sid(const void* void_a, const void* void_b) { 46 Symbol* a = vmSymbols::symbol_at(*((vmSymbols::SID*) void_a)); 47 Symbol* b = vmSymbols::symbol_at(*((vmSymbols::SID*) void_b)); 48 return compare_symbol(a, b); 49 } 50 } 51 52 #ifdef ASSERT 53 #define VM_SYMBOL_ENUM_NAME_BODY(name, string) #name "\0" 54 static const char* vm_symbol_enum_names = 55 VM_SYMBOLS_DO(VM_SYMBOL_ENUM_NAME_BODY, VM_ALIAS_IGNORE) 56 "\0"; 57 static const char* vm_symbol_enum_name(vmSymbols::SID sid) { 58 const char* string = &vm_symbol_enum_names[0]; 59 int skip = (int)sid - (int)vmSymbols::FIRST_SID; 60 for (; skip != 0; skip--) { 61 size_t skiplen = strlen(string); 62 if (skiplen == 0) return "<unknown>"; // overflow 63 string += skiplen+1; 64 } 65 return string; 66 } 67 #endif //ASSERT 68 69 // Put all the VM symbol strings in one place. 70 // Makes for a more compact libjvm. 71 #define VM_SYMBOL_BODY(name, string) string "\0" 72 static const char* vm_symbol_bodies = VM_SYMBOLS_DO(VM_SYMBOL_BODY, VM_ALIAS_IGNORE); 73 74 void vmSymbols::initialize(TRAPS) { 75 assert((int)SID_LIMIT <= (1<<log2_SID_LIMIT), "must fit in this bitfield"); 76 assert((int)SID_LIMIT*5 > (1<<log2_SID_LIMIT), "make the bitfield smaller, please"); 77 assert(vmIntrinsics::FLAG_LIMIT <= (1 << vmIntrinsics::log2_FLAG_LIMIT), "must fit in this bitfield"); 78 79 if (!UseSharedSpaces) { 80 const char* string = &vm_symbol_bodies[0]; 81 for (int index = (int)FIRST_SID; index < (int)SID_LIMIT; index++) { 82 Symbol* sym = SymbolTable::new_permanent_symbol(string, CHECK); 83 _symbols[index] = sym; 84 string += strlen(string); // skip string body 85 string += 1; // skip trailing null 86 } 87 88 _type_signatures[T_BYTE] = byte_signature(); 89 _type_signatures[T_CHAR] = char_signature(); 90 _type_signatures[T_DOUBLE] = double_signature(); 91 _type_signatures[T_FLOAT] = float_signature(); 92 _type_signatures[T_INT] = int_signature(); 93 _type_signatures[T_LONG] = long_signature(); 94 _type_signatures[T_SHORT] = short_signature(); 95 _type_signatures[T_BOOLEAN] = bool_signature(); 96 _type_signatures[T_VOID] = void_signature(); 97 // no single signatures for T_OBJECT or T_ARRAY 98 } 99 100 #ifdef ASSERT 101 // Check for duplicates: 102 for (int i1 = (int)FIRST_SID; i1 < (int)SID_LIMIT; i1++) { 103 Symbol* sym = symbol_at((SID)i1); 104 for (int i2 = (int)FIRST_SID; i2 < i1; i2++) { 105 if (symbol_at((SID)i2) == sym) { 106 tty->print("*** Duplicate VM symbol SIDs %s(%d) and %s(%d): \"", 107 vm_symbol_enum_name((SID)i2), i2, 108 vm_symbol_enum_name((SID)i1), i1); 109 sym->print_symbol_on(tty); 110 tty->print_cr("\""); 111 } 112 } 113 } 114 #endif //ASSERT 115 116 // Create an index for find_id: 117 { 118 for (int index = (int)FIRST_SID; index < (int)SID_LIMIT; index++) { 119 vm_symbol_index[index] = (SID)index; 120 } 121 int num_sids = SID_LIMIT-FIRST_SID; 122 qsort(&vm_symbol_index[FIRST_SID], num_sids, sizeof(vm_symbol_index[0]), 123 compare_vmsymbol_sid); 124 } 125 126 #ifdef ASSERT 127 { 128 // Spot-check correspondence between strings, symbols, and enums: 129 assert(_symbols[NO_SID] == NULL, "must be"); 130 const char* str = "java/lang/Object"; 131 TempNewSymbol jlo = SymbolTable::new_permanent_symbol(str, CHECK); 132 assert(strncmp(str, (char*)jlo->base(), jlo->utf8_length()) == 0, ""); 133 assert(jlo == java_lang_Object(), ""); 134 SID sid = VM_SYMBOL_ENUM_NAME(java_lang_Object); 135 assert(find_sid(jlo) == sid, ""); 136 assert(symbol_at(sid) == jlo, ""); 137 138 // Make sure find_sid produces the right answer in each case. 139 for (int index = (int)FIRST_SID; index < (int)SID_LIMIT; index++) { 140 Symbol* sym = symbol_at((SID)index); 141 sid = find_sid(sym); 142 assert(sid == (SID)index, "symbol index works"); 143 // Note: If there are duplicates, this assert will fail. 144 // A "Duplicate VM symbol" message will have already been printed. 145 } 146 147 // The string "format" happens (at the moment) not to be a vmSymbol, 148 // though it is a method name in java.lang.String. 149 str = "format"; 150 TempNewSymbol fmt = SymbolTable::new_permanent_symbol(str, CHECK); 151 sid = find_sid(fmt); 152 assert(sid == NO_SID, "symbol index works (negative test)"); 153 } 154 #endif 155 } 156 157 158 #ifndef PRODUCT 159 const char* vmSymbols::name_for(vmSymbols::SID sid) { 160 if (sid == NO_SID) 161 return "NO_SID"; 162 const char* string = &vm_symbol_bodies[0]; 163 for (int index = (int)FIRST_SID; index < (int)SID_LIMIT; index++) { 164 if (index == (int)sid) 165 return string; 166 string += strlen(string); // skip string body 167 string += 1; // skip trailing null 168 } 169 return "BAD_SID"; 170 } 171 #endif 172 173 174 175 void vmSymbols::symbols_do(SymbolClosure* f) { 176 for (int index = (int)FIRST_SID; index < (int)SID_LIMIT; index++) { 177 f->do_symbol(&_symbols[index]); 178 } 179 for (int i = 0; i < T_VOID+1; i++) { 180 f->do_symbol(&_type_signatures[i]); 181 } 182 } 183 184 void vmSymbols::serialize(SerializeClosure* soc) { 185 soc->do_region((u_char*)&_symbols[FIRST_SID], 186 (SID_LIMIT - FIRST_SID) * sizeof(_symbols[0])); 187 soc->do_region((u_char*)_type_signatures, sizeof(_type_signatures)); 188 } 189 190 191 BasicType vmSymbols::signature_type(Symbol* s) { 192 assert(s != NULL, "checking"); 193 for (int i = T_BOOLEAN; i < T_VOID+1; i++) { 194 if (s == _type_signatures[i]) { 195 return (BasicType)i; 196 } 197 } 198 return T_OBJECT; 199 } 200 201 202 static int mid_hint = (int)vmSymbols::FIRST_SID+1; 203 204 #ifndef PRODUCT 205 static int find_sid_calls, find_sid_probes; 206 // (Typical counts are calls=7000 and probes=17000.) 207 #endif 208 209 vmSymbols::SID vmSymbols::find_sid(Symbol* symbol) { 210 // Handle the majority of misses by a bounds check. 211 // Then, use a binary search over the index. 212 // Expected trip count is less than log2_SID_LIMIT, about eight. 213 // This is slow but acceptable, given that calls are not 214 // dynamically common. (Method*::intrinsic_id has a cache.) 215 NOT_PRODUCT(find_sid_calls++); 216 int min = (int)FIRST_SID, max = (int)SID_LIMIT - 1; 217 SID sid = NO_SID, sid1; 218 int cmp1; 219 sid1 = vm_symbol_index[min]; 220 cmp1 = compare_symbol(symbol, symbol_at(sid1)); 221 if (cmp1 <= 0) { // before the first 222 if (cmp1 == 0) sid = sid1; 223 } else { 224 sid1 = vm_symbol_index[max]; 225 cmp1 = compare_symbol(symbol, symbol_at(sid1)); 226 if (cmp1 >= 0) { // after the last 227 if (cmp1 == 0) sid = sid1; 228 } else { 229 // After checking the extremes, do a binary search. 230 ++min; --max; // endpoints are done 231 int mid = mid_hint; // start at previous success 232 while (max >= min) { 233 assert(mid >= min && mid <= max, ""); 234 NOT_PRODUCT(find_sid_probes++); 235 sid1 = vm_symbol_index[mid]; 236 cmp1 = compare_symbol(symbol, symbol_at(sid1)); 237 if (cmp1 == 0) { 238 mid_hint = mid; 239 sid = sid1; 240 break; 241 } 242 if (cmp1 < 0) 243 max = mid - 1; // symbol < symbol_at(sid) 244 else 245 min = mid + 1; 246 247 // Pick a new probe point: 248 mid = (max + min) / 2; 249 } 250 } 251 } 252 253 #ifdef ASSERT 254 // Perform the exhaustive self-check the first 1000 calls, 255 // and every 100 calls thereafter. 256 static int find_sid_check_count = -2000; 257 if ((uint)++find_sid_check_count > (uint)100) { 258 if (find_sid_check_count > 0) find_sid_check_count = 0; 259 260 // Make sure this is the right answer, using linear search. 261 // (We have already proven that there are no duplicates in the list.) 262 SID sid2 = NO_SID; 263 for (int index = (int)FIRST_SID; index < (int)SID_LIMIT; index++) { 264 Symbol* sym2 = symbol_at((SID)index); 265 if (sym2 == symbol) { 266 sid2 = (SID)index; 267 break; 268 } 269 } 270 // Unless it's a duplicate, assert that the sids are the same. 271 if (_symbols[sid] != _symbols[sid2]) { 272 assert(sid == sid2, "binary same as linear search"); 273 } 274 } 275 #endif //ASSERT 276 277 return sid; 278 } 279 280 vmSymbols::SID vmSymbols::find_sid(const char* symbol_name) { 281 Symbol* symbol = SymbolTable::probe(symbol_name, (int) strlen(symbol_name)); 282 if (symbol == NULL) return NO_SID; 283 return find_sid(symbol); 284 } 285 286 static vmIntrinsics::ID wrapper_intrinsic(BasicType type, bool unboxing) { 287 #define TYPE2(type, unboxing) ((int)(type)*2 + ((unboxing) ? 1 : 0)) 288 switch (TYPE2(type, unboxing)) { 289 #define BASIC_TYPE_CASE(type, box, unbox) \ 290 case TYPE2(type, false): return vmIntrinsics::box; \ 291 case TYPE2(type, true): return vmIntrinsics::unbox 292 BASIC_TYPE_CASE(T_BOOLEAN, _Boolean_valueOf, _booleanValue); 293 BASIC_TYPE_CASE(T_BYTE, _Byte_valueOf, _byteValue); 294 BASIC_TYPE_CASE(T_CHAR, _Character_valueOf, _charValue); 295 BASIC_TYPE_CASE(T_SHORT, _Short_valueOf, _shortValue); 296 BASIC_TYPE_CASE(T_INT, _Integer_valueOf, _intValue); 297 BASIC_TYPE_CASE(T_LONG, _Long_valueOf, _longValue); 298 BASIC_TYPE_CASE(T_FLOAT, _Float_valueOf, _floatValue); 299 BASIC_TYPE_CASE(T_DOUBLE, _Double_valueOf, _doubleValue); 300 #undef BASIC_TYPE_CASE 301 } 302 #undef TYPE2 303 return vmIntrinsics::_none; 304 } 305 306 vmIntrinsics::ID vmIntrinsics::for_boxing(BasicType type) { 307 return wrapper_intrinsic(type, false); 308 } 309 vmIntrinsics::ID vmIntrinsics::for_unboxing(BasicType type) { 310 return wrapper_intrinsic(type, true); 311 } 312 313 vmIntrinsics::ID vmIntrinsics::for_raw_conversion(BasicType src, BasicType dest) { 314 #define SRC_DEST(s,d) (((int)(s) << 4) + (int)(d)) 315 switch (SRC_DEST(src, dest)) { 316 case SRC_DEST(T_INT, T_FLOAT): return vmIntrinsics::_intBitsToFloat; 317 case SRC_DEST(T_FLOAT, T_INT): return vmIntrinsics::_floatToRawIntBits; 318 319 case SRC_DEST(T_LONG, T_DOUBLE): return vmIntrinsics::_longBitsToDouble; 320 case SRC_DEST(T_DOUBLE, T_LONG): return vmIntrinsics::_doubleToRawLongBits; 321 } 322 #undef SRC_DEST 323 324 return vmIntrinsics::_none; 325 } 326 327 bool vmIntrinsics::preserves_state(vmIntrinsics::ID id) { 328 assert(id != vmIntrinsics::_none, "must be a VM intrinsic"); 329 switch(id) { 330 #ifdef TRACE_HAVE_INTRINSICS 331 case vmIntrinsics::_classID: 332 case vmIntrinsics::_threadID: 333 case vmIntrinsics::_counterTime: 334 #endif 335 case vmIntrinsics::_currentTimeMillis: 336 case vmIntrinsics::_nanoTime: 337 case vmIntrinsics::_floatToRawIntBits: 338 case vmIntrinsics::_intBitsToFloat: 339 case vmIntrinsics::_doubleToRawLongBits: 340 case vmIntrinsics::_longBitsToDouble: 341 case vmIntrinsics::_getClass: 342 case vmIntrinsics::_isInstance: 343 case vmIntrinsics::_currentThread: 344 case vmIntrinsics::_dabs: 345 case vmIntrinsics::_dsqrt: 346 case vmIntrinsics::_dsin: 347 case vmIntrinsics::_dcos: 348 case vmIntrinsics::_dtan: 349 case vmIntrinsics::_dlog: 350 case vmIntrinsics::_dlog10: 351 case vmIntrinsics::_dexp: 352 case vmIntrinsics::_dpow: 353 case vmIntrinsics::_checkIndex: 354 case vmIntrinsics::_Reference_get: 355 case vmIntrinsics::_updateCRC32: 356 case vmIntrinsics::_updateBytesCRC32: 357 case vmIntrinsics::_updateByteBufferCRC32: 358 return true; 359 default: 360 return false; 361 } 362 } 363 364 bool vmIntrinsics::can_trap(vmIntrinsics::ID id) { 365 assert(id != vmIntrinsics::_none, "must be a VM intrinsic"); 366 switch(id) { 367 #ifdef TRACE_HAVE_INTRINSICS 368 case vmIntrinsics::_counterTime: 369 #endif 370 case vmIntrinsics::_currentTimeMillis: 371 case vmIntrinsics::_nanoTime: 372 case vmIntrinsics::_floatToRawIntBits: 373 case vmIntrinsics::_intBitsToFloat: 374 case vmIntrinsics::_doubleToRawLongBits: 375 case vmIntrinsics::_longBitsToDouble: 376 case vmIntrinsics::_currentThread: 377 case vmIntrinsics::_dabs: 378 case vmIntrinsics::_dsqrt: 379 case vmIntrinsics::_dsin: 380 case vmIntrinsics::_dcos: 381 case vmIntrinsics::_dtan: 382 case vmIntrinsics::_dlog: 383 case vmIntrinsics::_dlog10: 384 case vmIntrinsics::_dexp: 385 case vmIntrinsics::_dpow: 386 case vmIntrinsics::_updateCRC32: 387 case vmIntrinsics::_updateBytesCRC32: 388 case vmIntrinsics::_updateByteBufferCRC32: 389 return false; 390 default: 391 return true; 392 } 393 } 394 395 bool vmIntrinsics::does_virtual_dispatch(vmIntrinsics::ID id) { 396 assert(id != vmIntrinsics::_none, "must be a VM intrinsic"); 397 switch(id) { 398 case vmIntrinsics::_hashCode: 399 case vmIntrinsics::_clone: 400 return true; 401 break; 402 default: 403 return false; 404 } 405 } 406 407 int vmIntrinsics::predicates_needed(vmIntrinsics::ID id) { 408 assert(id != vmIntrinsics::_none, "must be a VM intrinsic"); 409 switch (id) { 410 case vmIntrinsics::_cipherBlockChaining_encryptAESCrypt: 411 case vmIntrinsics::_cipherBlockChaining_decryptAESCrypt: 412 return 1; 413 case vmIntrinsics::_digestBase_implCompressMB: 414 return 3; 415 default: 416 return 0; 417 } 418 } 419 420 bool vmIntrinsics::is_disabled_by_flags(methodHandle method) { 421 vmIntrinsics::ID id = method->intrinsic_id(); 422 assert(id != vmIntrinsics::_none, "must be a VM intrinsic"); 423 424 // -XX:-InlineNatives disables nearly all intrinsics except the ones listed in 425 // the following switch statement. 426 if (!InlineNatives) { 427 switch (id) { 428 case vmIntrinsics::_indexOf: 429 case vmIntrinsics::_compareTo: 430 case vmIntrinsics::_equals: 431 case vmIntrinsics::_equalsC: 432 case vmIntrinsics::_getAndAddInt: 433 case vmIntrinsics::_getAndAddLong: 434 case vmIntrinsics::_getAndSetInt: 435 case vmIntrinsics::_getAndSetLong: 436 case vmIntrinsics::_getAndSetObject: 437 case vmIntrinsics::_loadFence: 438 case vmIntrinsics::_storeFence: 439 case vmIntrinsics::_fullFence: 440 case vmIntrinsics::_Reference_get: 441 break; 442 default: 443 return true; 444 } 445 } 446 447 switch (id) { 448 case vmIntrinsics::_isInstance: 449 case vmIntrinsics::_isAssignableFrom: 450 case vmIntrinsics::_getModifiers: 451 case vmIntrinsics::_isInterface: 452 case vmIntrinsics::_isArray: 453 case vmIntrinsics::_isPrimitive: 454 case vmIntrinsics::_getSuperclass: 455 case vmIntrinsics::_Class_cast: 456 case vmIntrinsics::_getLength: 457 case vmIntrinsics::_newArray: 458 case vmIntrinsics::_getClass: 459 if (!InlineClassNatives) return true; 460 break; 461 case vmIntrinsics::_currentThread: 462 case vmIntrinsics::_isInterrupted: 463 if (!InlineThreadNatives) return true; 464 break; 465 case vmIntrinsics::_floatToRawIntBits: 466 case vmIntrinsics::_intBitsToFloat: 467 case vmIntrinsics::_doubleToRawLongBits: 468 case vmIntrinsics::_longBitsToDouble: 469 case vmIntrinsics::_dabs: 470 case vmIntrinsics::_dsqrt: 471 case vmIntrinsics::_dsin: 472 case vmIntrinsics::_dcos: 473 case vmIntrinsics::_dtan: 474 case vmIntrinsics::_dlog: 475 case vmIntrinsics::_dexp: 476 case vmIntrinsics::_dpow: 477 case vmIntrinsics::_dlog10: 478 case vmIntrinsics::_datan2: 479 case vmIntrinsics::_min: 480 case vmIntrinsics::_max: 481 case vmIntrinsics::_floatToIntBits: 482 case vmIntrinsics::_doubleToLongBits: 483 if (!InlineMathNatives) return true; 484 break; 485 case vmIntrinsics::_arraycopy: 486 if (!InlineArrayCopy) return true; 487 break; 488 case vmIntrinsics::_updateCRC32: 489 case vmIntrinsics::_updateBytesCRC32: 490 case vmIntrinsics::_updateByteBufferCRC32: 491 if (!UseCRC32Intrinsics) return true; 492 break; 493 case vmIntrinsics::_getObject: 494 case vmIntrinsics::_getBoolean: 495 case vmIntrinsics::_getByte: 496 case vmIntrinsics::_getShort: 497 case vmIntrinsics::_getChar: 498 case vmIntrinsics::_getInt: 499 case vmIntrinsics::_getLong: 500 case vmIntrinsics::_getFloat: 501 case vmIntrinsics::_getDouble: 502 case vmIntrinsics::_putObject: 503 case vmIntrinsics::_putBoolean: 504 case vmIntrinsics::_putByte: 505 case vmIntrinsics::_putShort: 506 case vmIntrinsics::_putChar: 507 case vmIntrinsics::_putInt: 508 case vmIntrinsics::_putLong: 509 case vmIntrinsics::_putFloat: 510 case vmIntrinsics::_putDouble: 511 case vmIntrinsics::_getObjectVolatile: 512 case vmIntrinsics::_getBooleanVolatile: 513 case vmIntrinsics::_getByteVolatile: 514 case vmIntrinsics::_getShortVolatile: 515 case vmIntrinsics::_getCharVolatile: 516 case vmIntrinsics::_getIntVolatile: 517 case vmIntrinsics::_getLongVolatile: 518 case vmIntrinsics::_getFloatVolatile: 519 case vmIntrinsics::_getDoubleVolatile: 520 case vmIntrinsics::_putObjectVolatile: 521 case vmIntrinsics::_putBooleanVolatile: 522 case vmIntrinsics::_putByteVolatile: 523 case vmIntrinsics::_putShortVolatile: 524 case vmIntrinsics::_putCharVolatile: 525 case vmIntrinsics::_putIntVolatile: 526 case vmIntrinsics::_putLongVolatile: 527 case vmIntrinsics::_putFloatVolatile: 528 case vmIntrinsics::_putDoubleVolatile: 529 case vmIntrinsics::_getByte_raw: 530 case vmIntrinsics::_getShort_raw: 531 case vmIntrinsics::_getChar_raw: 532 case vmIntrinsics::_getInt_raw: 533 case vmIntrinsics::_getLong_raw: 534 case vmIntrinsics::_getFloat_raw: 535 case vmIntrinsics::_getDouble_raw: 536 case vmIntrinsics::_putByte_raw: 537 case vmIntrinsics::_putShort_raw: 538 case vmIntrinsics::_putChar_raw: 539 case vmIntrinsics::_putInt_raw: 540 case vmIntrinsics::_putLong_raw: 541 case vmIntrinsics::_putFloat_raw: 542 case vmIntrinsics::_putDouble_raw: 543 case vmIntrinsics::_putOrderedObject: 544 case vmIntrinsics::_putOrderedLong: 545 case vmIntrinsics::_putOrderedInt: 546 case vmIntrinsics::_getAndAddInt: 547 case vmIntrinsics::_getAndAddLong: 548 case vmIntrinsics::_getAndSetInt: 549 case vmIntrinsics::_getAndSetLong: 550 case vmIntrinsics::_getAndSetObject: 551 case vmIntrinsics::_loadFence: 552 case vmIntrinsics::_storeFence: 553 case vmIntrinsics::_fullFence: 554 case vmIntrinsics::_compareAndSwapObject: 555 case vmIntrinsics::_compareAndSwapLong: 556 case vmIntrinsics::_compareAndSwapInt: 557 if (!InlineUnsafeOps) return true; 558 break; 559 case vmIntrinsics::_getShortUnaligned: 560 case vmIntrinsics::_getCharUnaligned: 561 case vmIntrinsics::_getIntUnaligned: 562 case vmIntrinsics::_getLongUnaligned: 563 case vmIntrinsics::_putShortUnaligned: 564 case vmIntrinsics::_putCharUnaligned: 565 case vmIntrinsics::_putIntUnaligned: 566 case vmIntrinsics::_putLongUnaligned: 567 case vmIntrinsics::_allocateInstance: 568 case vmIntrinsics::_getAddress_raw: 569 case vmIntrinsics::_putAddress_raw: 570 if (!InlineUnsafeOps || !UseUnalignedAccesses) return true; 571 break; 572 case vmIntrinsics::_hashCode: 573 if (!InlineObjectHash) return true; 574 break; 575 case vmIntrinsics::_aescrypt_encryptBlock: 576 case vmIntrinsics::_aescrypt_decryptBlock: 577 if (!UseAESIntrinsics) return true; 578 break; 579 case vmIntrinsics::_cipherBlockChaining_encryptAESCrypt: 580 case vmIntrinsics::_cipherBlockChaining_decryptAESCrypt: 581 if (!UseAESIntrinsics) return true; 582 break; 583 case vmIntrinsics::_sha_implCompress: 584 if (!UseSHA1Intrinsics) return true; 585 break; 586 case vmIntrinsics::_sha2_implCompress: 587 if (!UseSHA256Intrinsics) return true; 588 break; 589 case vmIntrinsics::_sha5_implCompress: 590 if (!UseSHA512Intrinsics) return true; 591 break; 592 case vmIntrinsics::_digestBase_implCompressMB: 593 if (!(UseSHA1Intrinsics || UseSHA256Intrinsics || UseSHA512Intrinsics)) return true; 594 break; 595 case vmIntrinsics::_ghash_processBlocks: 596 if (!UseGHASHIntrinsics) return true; 597 break; 598 case vmIntrinsics::_updateBytesCRC32C: 599 case vmIntrinsics::_updateDirectByteBufferCRC32C: 600 if (!UseCRC32CIntrinsics) return true; 601 break; 602 case vmIntrinsics::_updateBytesAdler32: 603 case vmIntrinsics::_updateByteBufferAdler32: 604 if (!UseAdler32Intrinsics) return true; 605 break; 606 case vmIntrinsics::_copyMemory: 607 if (!InlineArrayCopy || !InlineUnsafeOps) return true; 608 break; 609 #ifdef COMPILER1 610 case vmIntrinsics::_checkIndex: 611 if (!InlineNIOCheckIndex) return true; 612 break; 613 #endif // COMPILER1 614 #ifdef COMPILER2 615 case vmIntrinsics::_clone: 616 case vmIntrinsics::_copyOf: 617 case vmIntrinsics::_copyOfRange: 618 // These intrinsics use both the objectcopy and the arraycopy 619 // intrinsic mechanism. 620 if (!InlineObjectCopy || !InlineArrayCopy) return true; 621 break; 622 case vmIntrinsics::_compareTo: 623 if (!SpecialStringCompareTo) return true; 624 break; 625 case vmIntrinsics::_indexOf: 626 if (!SpecialStringIndexOf) return true; 627 break; 628 case vmIntrinsics::_equals: 629 if (!SpecialStringEquals) return true; 630 break; 631 case vmIntrinsics::_equalsC: 632 if (!SpecialArraysEquals) return true; 633 break; 634 case vmIntrinsics::_encodeISOArray: 635 if (!SpecialEncodeISOArray) return true; 636 break; 637 case vmIntrinsics::_getCallerClass: 638 if (!InlineReflectionGetCallerClass) return true; 639 break; 640 case vmIntrinsics::_multiplyToLen: 641 if (!UseMultiplyToLenIntrinsic) return true; 642 break; 643 case vmIntrinsics::_squareToLen: 644 if (!UseSquareToLenIntrinsic) return true; 645 break; 646 case vmIntrinsics::_mulAdd: 647 if (!UseMulAddIntrinsic) return true; 648 break; 649 case vmIntrinsics::_montgomeryMultiply: 650 if (!UseMontgomeryMultiplyIntrinsic) return true; 651 break; 652 case vmIntrinsics::_montgomerySquare: 653 if (!UseMontgomerySquareIntrinsic) return true; 654 break; 655 case vmIntrinsics::_addExactI: 656 case vmIntrinsics::_addExactL: 657 case vmIntrinsics::_decrementExactI: 658 case vmIntrinsics::_decrementExactL: 659 case vmIntrinsics::_incrementExactI: 660 case vmIntrinsics::_incrementExactL: 661 case vmIntrinsics::_multiplyExactI: 662 case vmIntrinsics::_multiplyExactL: 663 case vmIntrinsics::_negateExactI: 664 case vmIntrinsics::_negateExactL: 665 case vmIntrinsics::_subtractExactI: 666 case vmIntrinsics::_subtractExactL: 667 if (!UseMathExactIntrinsics || !InlineMathNatives) return true; 668 break; 669 #endif // COMPILER2 670 default: 671 return false; 672 } 673 674 return false; 675 } 676 677 #define VM_INTRINSIC_INITIALIZE(id, klass, name, sig, flags) #id "\0" 678 static const char* vm_intrinsic_name_bodies = 679 VM_INTRINSICS_DO(VM_INTRINSIC_INITIALIZE, 680 VM_SYMBOL_IGNORE, VM_SYMBOL_IGNORE, VM_SYMBOL_IGNORE, VM_ALIAS_IGNORE); 681 682 static const char* vm_intrinsic_name_table[vmIntrinsics::ID_LIMIT]; 683 684 const char* vmIntrinsics::name_at(vmIntrinsics::ID id) { 685 const char** nt = &vm_intrinsic_name_table[0]; 686 if (nt[_none] == NULL) { 687 char* string = (char*) &vm_intrinsic_name_bodies[0]; 688 for (int index = FIRST_ID; index < ID_LIMIT; index++) { 689 nt[index] = string; 690 string += strlen(string); // skip string body 691 string += 1; // skip trailing null 692 } 693 assert(!strcmp(nt[_hashCode], "_hashCode"), "lined up"); 694 nt[_none] = "_none"; 695 } 696 if ((uint)id < (uint)ID_LIMIT) 697 return vm_intrinsic_name_table[(uint)id]; 698 else 699 return "(unknown intrinsic)"; 700 } 701 702 // These are flag-matching functions: 703 inline bool match_F_R(jshort flags) { 704 const int req = 0; 705 const int neg = JVM_ACC_STATIC | JVM_ACC_SYNCHRONIZED; 706 return (flags & (req | neg)) == req; 707 } 708 inline bool match_F_Y(jshort flags) { 709 const int req = JVM_ACC_SYNCHRONIZED; 710 const int neg = JVM_ACC_STATIC; 711 return (flags & (req | neg)) == req; 712 } 713 inline bool match_F_RN(jshort flags) { 714 const int req = JVM_ACC_NATIVE; 715 const int neg = JVM_ACC_STATIC | JVM_ACC_SYNCHRONIZED; 716 return (flags & (req | neg)) == req; 717 } 718 inline bool match_F_S(jshort flags) { 719 const int req = JVM_ACC_STATIC; 720 const int neg = JVM_ACC_SYNCHRONIZED; 721 return (flags & (req | neg)) == req; 722 } 723 inline bool match_F_SN(jshort flags) { 724 const int req = JVM_ACC_STATIC | JVM_ACC_NATIVE; 725 const int neg = JVM_ACC_SYNCHRONIZED; 726 return (flags & (req | neg)) == req; 727 } 728 inline bool match_F_RNY(jshort flags) { 729 const int req = JVM_ACC_NATIVE | JVM_ACC_SYNCHRONIZED; 730 const int neg = JVM_ACC_STATIC; 731 return (flags & (req | neg)) == req; 732 } 733 734 // These are for forming case labels: 735 #define ID3(x, y, z) (( jlong)(z) + \ 736 ((jlong)(y) << vmSymbols::log2_SID_LIMIT) + \ 737 ((jlong)(x) << (2*vmSymbols::log2_SID_LIMIT)) ) 738 #define SID_ENUM(n) vmSymbols::VM_SYMBOL_ENUM_NAME(n) 739 740 vmIntrinsics::ID vmIntrinsics::find_id_impl(vmSymbols::SID holder, 741 vmSymbols::SID name, 742 vmSymbols::SID sig, 743 jshort flags) { 744 assert((int)vmSymbols::SID_LIMIT <= (1<<vmSymbols::log2_SID_LIMIT), "must fit"); 745 746 // Let the C compiler build the decision tree. 747 748 #define VM_INTRINSIC_CASE(id, klass, name, sig, fcode) \ 749 case ID3(SID_ENUM(klass), SID_ENUM(name), SID_ENUM(sig)): \ 750 if (!match_##fcode(flags)) break; \ 751 return id; 752 753 switch (ID3(holder, name, sig)) { 754 VM_INTRINSICS_DO(VM_INTRINSIC_CASE, 755 VM_SYMBOL_IGNORE, VM_SYMBOL_IGNORE, VM_SYMBOL_IGNORE, VM_ALIAS_IGNORE); 756 } 757 return vmIntrinsics::_none; 758 759 #undef VM_INTRINSIC_CASE 760 } 761 762 763 const char* vmIntrinsics::short_name_as_C_string(vmIntrinsics::ID id, char* buf, int buflen) { 764 const char* str = name_at(id); 765 #ifndef PRODUCT 766 const char* kname = vmSymbols::name_for(class_for(id)); 767 const char* mname = vmSymbols::name_for(name_for(id)); 768 const char* sname = vmSymbols::name_for(signature_for(id)); 769 const char* fname = ""; 770 switch (flags_for(id)) { 771 case F_Y: fname = "synchronized "; break; 772 case F_RN: fname = "native "; break; 773 case F_SN: fname = "native static "; break; 774 case F_S: fname = "static "; break; 775 case F_RNY:fname = "native synchronized "; break; 776 } 777 const char* kptr = strrchr(kname, '/'); 778 if (kptr != NULL) kname = kptr + 1; 779 int len = jio_snprintf(buf, buflen, "%s: %s%s.%s%s", 780 str, fname, kname, mname, sname); 781 if (len < buflen) 782 str = buf; 783 #endif //PRODUCT 784 return str; 785 } 786 787 788 // These are to get information about intrinsics. 789 790 #define ID4(x, y, z, f) ((ID3(x, y, z) << vmIntrinsics::log2_FLAG_LIMIT) | (jlong) (f)) 791 792 static const jlong intrinsic_info_array[vmIntrinsics::ID_LIMIT+1] = { 793 #define VM_INTRINSIC_INFO(ignore_id, klass, name, sig, fcode) \ 794 ID4(SID_ENUM(klass), SID_ENUM(name), SID_ENUM(sig), vmIntrinsics::fcode), 795 796 0, VM_INTRINSICS_DO(VM_INTRINSIC_INFO, 797 VM_SYMBOL_IGNORE, VM_SYMBOL_IGNORE, VM_SYMBOL_IGNORE, VM_ALIAS_IGNORE) 798 0 799 #undef VM_INTRINSIC_INFO 800 }; 801 802 inline jlong intrinsic_info(vmIntrinsics::ID id) { 803 return intrinsic_info_array[vmIntrinsics::ID_from((int)id)]; 804 } 805 806 vmSymbols::SID vmIntrinsics::class_for(vmIntrinsics::ID id) { 807 jlong info = intrinsic_info(id); 808 int shift = 2*vmSymbols::log2_SID_LIMIT + log2_FLAG_LIMIT, mask = right_n_bits(vmSymbols::log2_SID_LIMIT); 809 assert(((ID4(1021,1022,1023,15) >> shift) & mask) == 1021, ""); 810 return vmSymbols::SID( (info >> shift) & mask ); 811 } 812 813 vmSymbols::SID vmIntrinsics::name_for(vmIntrinsics::ID id) { 814 jlong info = intrinsic_info(id); 815 int shift = vmSymbols::log2_SID_LIMIT + log2_FLAG_LIMIT, mask = right_n_bits(vmSymbols::log2_SID_LIMIT); 816 assert(((ID4(1021,1022,1023,15) >> shift) & mask) == 1022, ""); 817 return vmSymbols::SID( (info >> shift) & mask ); 818 } 819 820 vmSymbols::SID vmIntrinsics::signature_for(vmIntrinsics::ID id) { 821 jlong info = intrinsic_info(id); 822 int shift = log2_FLAG_LIMIT, mask = right_n_bits(vmSymbols::log2_SID_LIMIT); 823 assert(((ID4(1021,1022,1023,15) >> shift) & mask) == 1023, ""); 824 return vmSymbols::SID( (info >> shift) & mask ); 825 } 826 827 vmIntrinsics::Flags vmIntrinsics::flags_for(vmIntrinsics::ID id) { 828 jlong info = intrinsic_info(id); 829 int shift = 0, mask = right_n_bits(log2_FLAG_LIMIT); 830 assert(((ID4(1021,1022,1023,15) >> shift) & mask) == 15, ""); 831 return Flags( (info >> shift) & mask ); 832 } 833 834 835 #ifndef PRODUCT 836 // verify_method performs an extra check on a matched intrinsic method 837 838 static bool match_method(Method* m, Symbol* n, Symbol* s) { 839 return (m->name() == n && 840 m->signature() == s); 841 } 842 843 static vmIntrinsics::ID match_method_with_klass(Method* m, Symbol* mk) { 844 #define VM_INTRINSIC_MATCH(id, klassname, namepart, sigpart, flags) \ 845 { Symbol* k = vmSymbols::klassname(); \ 846 if (mk == k) { \ 847 Symbol* n = vmSymbols::namepart(); \ 848 Symbol* s = vmSymbols::sigpart(); \ 849 if (match_method(m, n, s)) \ 850 return vmIntrinsics::id; \ 851 } } 852 VM_INTRINSICS_DO(VM_INTRINSIC_MATCH, 853 VM_SYMBOL_IGNORE, VM_SYMBOL_IGNORE, VM_SYMBOL_IGNORE, VM_ALIAS_IGNORE); 854 return vmIntrinsics::_none; 855 #undef VM_INTRINSIC_MATCH 856 } 857 858 void vmIntrinsics::verify_method(ID actual_id, Method* m) { 859 Symbol* mk = m->method_holder()->name(); 860 ID declared_id = match_method_with_klass(m, mk); 861 862 if (declared_id == actual_id) return; // success 863 864 if (declared_id == _none && actual_id != _none && mk == vmSymbols::java_lang_StrictMath()) { 865 // Here are a few special cases in StrictMath not declared in vmSymbols.hpp. 866 switch (actual_id) { 867 case _min: 868 case _max: 869 case _dsqrt: 870 declared_id = match_method_with_klass(m, vmSymbols::java_lang_Math()); 871 if (declared_id == actual_id) return; // acceptable alias 872 break; 873 } 874 } 875 876 const char* declared_name = name_at(declared_id); 877 const char* actual_name = name_at(actual_id); 878 methodHandle mh = m; 879 m = NULL; 880 ttyLocker ttyl; 881 if (xtty != NULL) { 882 xtty->begin_elem("intrinsic_misdeclared actual='%s' declared='%s'", 883 actual_name, declared_name); 884 xtty->method(mh); 885 xtty->end_elem("%s", ""); 886 } 887 if (PrintMiscellaneous && (WizardMode || Verbose)) { 888 tty->print_cr("*** misidentified method; %s(%d) should be %s(%d):", 889 declared_name, declared_id, actual_name, actual_id); 890 mh()->print_short_name(tty); 891 tty->cr(); 892 } 893 } 894 #endif //PRODUCT