1 /* 2 * Copyright (c) 1997, 2018, 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 "jvm.h" 27 #include "classfile/vmSymbols.hpp" 28 #include "compiler/compilerDirectives.hpp" 29 #include "memory/allocation.inline.hpp" 30 #include "memory/oopFactory.hpp" 31 #include "memory/metaspaceClosure.hpp" 32 #include "oops/oop.inline.hpp" 33 #include "runtime/handles.inline.hpp" 34 #include "utilities/xmlstream.hpp" 35 36 37 Symbol* vmSymbols::_symbols[vmSymbols::SID_LIMIT]; 38 39 Symbol* vmSymbols::_type_signatures[T_VOID+1] = { NULL /*, NULL...*/ }; 40 41 inline int compare_symbol(const Symbol* a, const Symbol* b) { 42 if (a == b) return 0; 43 // follow the natural address order: 44 return (address)a > (address)b ? +1 : -1; 45 } 46 47 static vmSymbols::SID vm_symbol_index[vmSymbols::SID_LIMIT]; 48 extern "C" { 49 static int compare_vmsymbol_sid(const void* void_a, const void* void_b) { 50 const Symbol* a = vmSymbols::symbol_at(*((vmSymbols::SID*) void_a)); 51 const Symbol* b = vmSymbols::symbol_at(*((vmSymbols::SID*) void_b)); 52 return compare_symbol(a, b); 53 } 54 } 55 56 #ifdef ASSERT 57 #define VM_SYMBOL_ENUM_NAME_BODY(name, string) #name "\0" 58 static const char* vm_symbol_enum_names = 59 VM_SYMBOLS_DO(VM_SYMBOL_ENUM_NAME_BODY, VM_ALIAS_IGNORE) 60 "\0"; 61 static const char* vm_symbol_enum_name(vmSymbols::SID sid) { 62 const char* string = &vm_symbol_enum_names[0]; 63 int skip = (int)sid - (int)vmSymbols::FIRST_SID; 64 for (; skip != 0; skip--) { 65 size_t skiplen = strlen(string); 66 if (skiplen == 0) return "<unknown>"; // overflow 67 string += skiplen+1; 68 } 69 return string; 70 } 71 #endif //ASSERT 72 73 // Put all the VM symbol strings in one place. 74 // Makes for a more compact libjvm. 75 #define VM_SYMBOL_BODY(name, string) string "\0" 76 static const char* vm_symbol_bodies = VM_SYMBOLS_DO(VM_SYMBOL_BODY, VM_ALIAS_IGNORE); 77 78 void vmSymbols::initialize(TRAPS) { 79 assert((int)SID_LIMIT <= (1<<log2_SID_LIMIT), "must fit in this bitfield"); 80 assert((int)SID_LIMIT*5 > (1<<log2_SID_LIMIT), "make the bitfield smaller, please"); 81 assert(vmIntrinsics::FLAG_LIMIT <= (1 << vmIntrinsics::log2_FLAG_LIMIT), "must fit in this bitfield"); 82 83 if (!UseSharedSpaces) { 84 const char* string = &vm_symbol_bodies[0]; 85 for (int index = (int)FIRST_SID; index < (int)SID_LIMIT; index++) { 86 Symbol* sym = SymbolTable::new_permanent_symbol(string, CHECK); 87 _symbols[index] = sym; 88 string += strlen(string); // skip string body 89 string += 1; // skip trailing null 90 } 91 92 _type_signatures[T_BYTE] = byte_signature(); 93 _type_signatures[T_CHAR] = char_signature(); 94 _type_signatures[T_DOUBLE] = double_signature(); 95 _type_signatures[T_FLOAT] = float_signature(); 96 _type_signatures[T_INT] = int_signature(); 97 _type_signatures[T_LONG] = long_signature(); 98 _type_signatures[T_SHORT] = short_signature(); 99 _type_signatures[T_BOOLEAN] = bool_signature(); 100 _type_signatures[T_VOID] = void_signature(); 101 // no single signatures for T_OBJECT or T_ARRAY 102 #ifdef ASSERT 103 for (int i = (int)T_BOOLEAN; i < (int)T_VOID+1; i++) { 104 Symbol* s = _type_signatures[i]; 105 if (s == NULL) continue; 106 BasicType st = signature_type(s); 107 assert(st == i, ""); 108 } 109 #endif 110 } 111 112 #ifdef ASSERT 113 // Check for duplicates: 114 for (int i1 = (int)FIRST_SID; i1 < (int)SID_LIMIT; i1++) { 115 Symbol* sym = symbol_at((SID)i1); 116 for (int i2 = (int)FIRST_SID; i2 < i1; i2++) { 117 if (symbol_at((SID)i2) == sym) { 118 tty->print("*** Duplicate VM symbol SIDs %s(%d) and %s(%d): \"", 119 vm_symbol_enum_name((SID)i2), i2, 120 vm_symbol_enum_name((SID)i1), i1); 121 sym->print_symbol_on(tty); 122 tty->print_cr("\""); 123 } 124 } 125 } 126 #endif //ASSERT 127 128 // Create an index for find_id: 129 { 130 for (int index = (int)FIRST_SID; index < (int)SID_LIMIT; index++) { 131 vm_symbol_index[index] = (SID)index; 132 } 133 int num_sids = SID_LIMIT-FIRST_SID; 134 qsort(&vm_symbol_index[FIRST_SID], num_sids, sizeof(vm_symbol_index[0]), 135 compare_vmsymbol_sid); 136 } 137 138 #ifdef ASSERT 139 { 140 // Spot-check correspondence between strings, symbols, and enums: 141 assert(_symbols[NO_SID] == NULL, "must be"); 142 const char* str = "java/lang/Object"; 143 TempNewSymbol jlo = SymbolTable::new_permanent_symbol(str, CHECK); 144 assert(strncmp(str, (char*)jlo->base(), jlo->utf8_length()) == 0, ""); 145 assert(jlo == java_lang_Object(), ""); 146 SID sid = VM_SYMBOL_ENUM_NAME(java_lang_Object); 147 assert(find_sid(jlo) == sid, ""); 148 assert(symbol_at(sid) == jlo, ""); 149 150 // Make sure find_sid produces the right answer in each case. 151 for (int index = (int)FIRST_SID; index < (int)SID_LIMIT; index++) { 152 Symbol* sym = symbol_at((SID)index); 153 sid = find_sid(sym); 154 assert(sid == (SID)index, "symbol index works"); 155 // Note: If there are duplicates, this assert will fail. 156 // A "Duplicate VM symbol" message will have already been printed. 157 } 158 159 // The string "format" happens (at the moment) not to be a vmSymbol, 160 // though it is a method name in java.lang.String. 161 str = "format"; 162 TempNewSymbol fmt = SymbolTable::new_permanent_symbol(str, CHECK); 163 sid = find_sid(fmt); 164 assert(sid == NO_SID, "symbol index works (negative test)"); 165 } 166 #endif 167 } 168 169 170 #ifndef PRODUCT 171 const char* vmSymbols::name_for(vmSymbols::SID sid) { 172 if (sid == NO_SID) 173 return "NO_SID"; 174 const char* string = &vm_symbol_bodies[0]; 175 for (int index = (int)FIRST_SID; index < (int)SID_LIMIT; index++) { 176 if (index == (int)sid) 177 return string; 178 string += strlen(string); // skip string body 179 string += 1; // skip trailing null 180 } 181 return "BAD_SID"; 182 } 183 #endif 184 185 186 187 void vmSymbols::symbols_do(SymbolClosure* f) { 188 for (int index = (int)FIRST_SID; index < (int)SID_LIMIT; index++) { 189 f->do_symbol(&_symbols[index]); 190 } 191 for (int i = 0; i < T_VOID+1; i++) { 192 f->do_symbol(&_type_signatures[i]); 193 } 194 } 195 196 void vmSymbols::metaspace_pointers_do(MetaspaceClosure *it) { 197 for (int index = (int)FIRST_SID; index < (int)SID_LIMIT; index++) { 198 it->push(&_symbols[index]); 199 } 200 for (int i = 0; i < T_VOID+1; i++) { 201 it->push(&_type_signatures[i]); 202 } 203 } 204 205 void vmSymbols::serialize(SerializeClosure* soc) { 206 soc->do_region((u_char*)&_symbols[FIRST_SID], 207 (SID_LIMIT - FIRST_SID) * sizeof(_symbols[0])); 208 soc->do_region((u_char*)_type_signatures, sizeof(_type_signatures)); 209 } 210 211 212 BasicType vmSymbols::signature_type(const Symbol* s) { 213 assert(s != NULL, "checking"); 214 if (s->utf8_length() == 1) { 215 BasicType result = char2type(s->char_at(0)); 216 if (is_java_primitive(result) || result == T_VOID) { 217 assert(s == _type_signatures[result], ""); 218 return result; 219 } 220 } 221 return T_OBJECT; 222 } 223 224 225 static int mid_hint = (int)vmSymbols::FIRST_SID+1; 226 227 #ifndef PRODUCT 228 static int find_sid_calls, find_sid_probes; 229 // (Typical counts are calls=7000 and probes=17000.) 230 #endif 231 232 vmSymbols::SID vmSymbols::find_sid(const Symbol* symbol) { 233 // Handle the majority of misses by a bounds check. 234 // Then, use a binary search over the index. 235 // Expected trip count is less than log2_SID_LIMIT, about eight. 236 // This is slow but acceptable, given that calls are not 237 // dynamically common. (Method*::intrinsic_id has a cache.) 238 NOT_PRODUCT(find_sid_calls++); 239 int min = (int)FIRST_SID, max = (int)SID_LIMIT - 1; 240 SID sid = NO_SID, sid1; 241 int cmp1; 242 sid1 = vm_symbol_index[min]; 243 cmp1 = compare_symbol(symbol, symbol_at(sid1)); 244 if (cmp1 <= 0) { // before the first 245 if (cmp1 == 0) sid = sid1; 246 } else { 247 sid1 = vm_symbol_index[max]; 248 cmp1 = compare_symbol(symbol, symbol_at(sid1)); 249 if (cmp1 >= 0) { // after the last 250 if (cmp1 == 0) sid = sid1; 251 } else { 252 // After checking the extremes, do a binary search. 253 ++min; --max; // endpoints are done 254 int mid = mid_hint; // start at previous success 255 while (max >= min) { 256 assert(mid >= min && mid <= max, ""); 257 NOT_PRODUCT(find_sid_probes++); 258 sid1 = vm_symbol_index[mid]; 259 cmp1 = compare_symbol(symbol, symbol_at(sid1)); 260 if (cmp1 == 0) { 261 mid_hint = mid; 262 sid = sid1; 263 break; 264 } 265 if (cmp1 < 0) 266 max = mid - 1; // symbol < symbol_at(sid) 267 else 268 min = mid + 1; 269 270 // Pick a new probe point: 271 mid = (max + min) / 2; 272 } 273 } 274 } 275 276 #ifdef ASSERT 277 // Perform the exhaustive self-check the first 1000 calls, 278 // and every 100 calls thereafter. 279 static int find_sid_check_count = -2000; 280 if ((uint)++find_sid_check_count > (uint)100) { 281 if (find_sid_check_count > 0) find_sid_check_count = 0; 282 283 // Make sure this is the right answer, using linear search. 284 // (We have already proven that there are no duplicates in the list.) 285 SID sid2 = NO_SID; 286 for (int index = (int)FIRST_SID; index < (int)SID_LIMIT; index++) { 287 Symbol* sym2 = symbol_at((SID)index); 288 if (sym2 == symbol) { 289 sid2 = (SID)index; 290 break; 291 } 292 } 293 // Unless it's a duplicate, assert that the sids are the same. 294 if (_symbols[sid] != _symbols[sid2]) { 295 assert(sid == sid2, "binary same as linear search"); 296 } 297 } 298 #endif //ASSERT 299 300 return sid; 301 } 302 303 vmSymbols::SID vmSymbols::find_sid(const char* symbol_name) { 304 Symbol* symbol = SymbolTable::probe(symbol_name, (int) strlen(symbol_name)); 305 if (symbol == NULL) return NO_SID; 306 return find_sid(symbol); 307 } 308 309 static vmIntrinsics::ID wrapper_intrinsic(BasicType type, bool unboxing) { 310 #define TYPE2(type, unboxing) ((int)(type)*2 + ((unboxing) ? 1 : 0)) 311 switch (TYPE2(type, unboxing)) { 312 #define BASIC_TYPE_CASE(type, box, unbox) \ 313 case TYPE2(type, false): return vmIntrinsics::box; \ 314 case TYPE2(type, true): return vmIntrinsics::unbox 315 BASIC_TYPE_CASE(T_BOOLEAN, _Boolean_valueOf, _booleanValue); 316 BASIC_TYPE_CASE(T_BYTE, _Byte_valueOf, _byteValue); 317 BASIC_TYPE_CASE(T_CHAR, _Character_valueOf, _charValue); 318 BASIC_TYPE_CASE(T_SHORT, _Short_valueOf, _shortValue); 319 BASIC_TYPE_CASE(T_INT, _Integer_valueOf, _intValue); 320 BASIC_TYPE_CASE(T_LONG, _Long_valueOf, _longValue); 321 BASIC_TYPE_CASE(T_FLOAT, _Float_valueOf, _floatValue); 322 BASIC_TYPE_CASE(T_DOUBLE, _Double_valueOf, _doubleValue); 323 #undef BASIC_TYPE_CASE 324 } 325 #undef TYPE2 326 return vmIntrinsics::_none; 327 } 328 329 vmIntrinsics::ID vmIntrinsics::for_boxing(BasicType type) { 330 return wrapper_intrinsic(type, false); 331 } 332 vmIntrinsics::ID vmIntrinsics::for_unboxing(BasicType type) { 333 return wrapper_intrinsic(type, true); 334 } 335 336 vmIntrinsics::ID vmIntrinsics::for_raw_conversion(BasicType src, BasicType dest) { 337 #define SRC_DEST(s,d) (((int)(s) << 4) + (int)(d)) 338 switch (SRC_DEST(src, dest)) { 339 case SRC_DEST(T_INT, T_FLOAT): return vmIntrinsics::_intBitsToFloat; 340 case SRC_DEST(T_FLOAT, T_INT): return vmIntrinsics::_floatToRawIntBits; 341 342 case SRC_DEST(T_LONG, T_DOUBLE): return vmIntrinsics::_longBitsToDouble; 343 case SRC_DEST(T_DOUBLE, T_LONG): return vmIntrinsics::_doubleToRawLongBits; 344 } 345 #undef SRC_DEST 346 347 return vmIntrinsics::_none; 348 } 349 350 bool vmIntrinsics::preserves_state(vmIntrinsics::ID id) { 351 assert(id != vmIntrinsics::_none, "must be a VM intrinsic"); 352 switch(id) { 353 #ifdef JFR_HAVE_INTRINSICS 354 case vmIntrinsics::_counterTime: 355 #endif 356 case vmIntrinsics::_currentTimeMillis: 357 case vmIntrinsics::_nanoTime: 358 case vmIntrinsics::_floatToRawIntBits: 359 case vmIntrinsics::_intBitsToFloat: 360 case vmIntrinsics::_doubleToRawLongBits: 361 case vmIntrinsics::_longBitsToDouble: 362 case vmIntrinsics::_getClass: 363 case vmIntrinsics::_isInstance: 364 case vmIntrinsics::_currentThread: 365 case vmIntrinsics::_dabs: 366 case vmIntrinsics::_dsqrt: 367 case vmIntrinsics::_dsin: 368 case vmIntrinsics::_dcos: 369 case vmIntrinsics::_dtan: 370 case vmIntrinsics::_dlog: 371 case vmIntrinsics::_dlog10: 372 case vmIntrinsics::_dexp: 373 case vmIntrinsics::_dpow: 374 case vmIntrinsics::_checkIndex: 375 case vmIntrinsics::_Reference_get: 376 case vmIntrinsics::_updateCRC32: 377 case vmIntrinsics::_updateBytesCRC32: 378 case vmIntrinsics::_updateByteBufferCRC32: 379 case vmIntrinsics::_vectorizedMismatch: 380 case vmIntrinsics::_fmaD: 381 case vmIntrinsics::_fmaF: 382 case vmIntrinsics::_isDigit: 383 case vmIntrinsics::_isLowerCase: 384 case vmIntrinsics::_isUpperCase: 385 case vmIntrinsics::_isWhitespace: 386 return true; 387 default: 388 return false; 389 } 390 } 391 392 bool vmIntrinsics::can_trap(vmIntrinsics::ID id) { 393 assert(id != vmIntrinsics::_none, "must be a VM intrinsic"); 394 switch(id) { 395 #ifdef JFR_HAVE_INTRINSICS 396 case vmIntrinsics::_counterTime: 397 case vmIntrinsics::_getClassId: 398 #endif 399 case vmIntrinsics::_currentTimeMillis: 400 case vmIntrinsics::_nanoTime: 401 case vmIntrinsics::_floatToRawIntBits: 402 case vmIntrinsics::_intBitsToFloat: 403 case vmIntrinsics::_doubleToRawLongBits: 404 case vmIntrinsics::_longBitsToDouble: 405 case vmIntrinsics::_currentThread: 406 case vmIntrinsics::_dabs: 407 case vmIntrinsics::_dsqrt: 408 case vmIntrinsics::_dsin: 409 case vmIntrinsics::_dcos: 410 case vmIntrinsics::_dtan: 411 case vmIntrinsics::_dlog: 412 case vmIntrinsics::_dlog10: 413 case vmIntrinsics::_dexp: 414 case vmIntrinsics::_dpow: 415 case vmIntrinsics::_updateCRC32: 416 case vmIntrinsics::_updateBytesCRC32: 417 case vmIntrinsics::_updateByteBufferCRC32: 418 case vmIntrinsics::_vectorizedMismatch: 419 case vmIntrinsics::_fmaD: 420 case vmIntrinsics::_fmaF: 421 return false; 422 default: 423 return true; 424 } 425 } 426 427 // Some intrinsics produce different results if they are not pinned 428 bool vmIntrinsics::should_be_pinned(vmIntrinsics::ID id) { 429 assert(id != vmIntrinsics::_none, "must be a VM intrinsic"); 430 switch(id) { 431 #ifdef JFR_HAVE_INTRINSICS 432 case vmIntrinsics::_counterTime: 433 #endif 434 case vmIntrinsics::_currentTimeMillis: 435 case vmIntrinsics::_nanoTime: 436 return true; 437 default: 438 return false; 439 } 440 } 441 442 bool vmIntrinsics::does_virtual_dispatch(vmIntrinsics::ID id) { 443 assert(id != vmIntrinsics::_none, "must be a VM intrinsic"); 444 switch(id) { 445 case vmIntrinsics::_hashCode: 446 case vmIntrinsics::_clone: 447 return true; 448 break; 449 default: 450 return false; 451 } 452 } 453 454 int vmIntrinsics::predicates_needed(vmIntrinsics::ID id) { 455 assert(id != vmIntrinsics::_none, "must be a VM intrinsic"); 456 switch (id) { 457 case vmIntrinsics::_cipherBlockChaining_encryptAESCrypt: 458 case vmIntrinsics::_cipherBlockChaining_decryptAESCrypt: 459 case vmIntrinsics::_counterMode_AESCrypt: 460 return 1; 461 case vmIntrinsics::_digestBase_implCompressMB: 462 return 3; 463 default: 464 return 0; 465 } 466 } 467 468 bool vmIntrinsics::is_intrinsic_available(vmIntrinsics::ID id) { 469 return !vmIntrinsics::is_intrinsic_disabled(id) && 470 !vmIntrinsics::is_disabled_by_flags(id); 471 } 472 473 bool vmIntrinsics::is_intrinsic_disabled(vmIntrinsics::ID id) { 474 assert(id != vmIntrinsics::_none, "must be a VM intrinsic"); 475 476 // Canonicalize DisableIntrinsic to contain only ',' as a separator. 477 // Note, DirectiveSet may not be created at this point yet since this code 478 // is called from initial stub geenration code. 479 char* local_list = (char*)DirectiveSet::canonicalize_disableintrinsic(DisableIntrinsic); 480 481 bool found = false; 482 char* token = strtok(local_list, ","); 483 while (token != NULL) { 484 if (strcmp(token, vmIntrinsics::name_at(id)) == 0) { 485 found = true; 486 break; 487 } else { 488 token = strtok(NULL, ","); 489 } 490 } 491 492 FREE_C_HEAP_ARRAY(char, local_list); 493 return found; 494 } 495 496 497 bool vmIntrinsics::is_disabled_by_flags(const methodHandle& method) { 498 vmIntrinsics::ID id = method->intrinsic_id(); 499 assert(id != vmIntrinsics::_none, "must be a VM intrinsic"); 500 return is_disabled_by_flags(id); 501 } 502 503 bool vmIntrinsics::is_disabled_by_flags(vmIntrinsics::ID id) { 504 assert(id != vmIntrinsics::_none, "must be a VM intrinsic"); 505 506 // -XX:-InlineNatives disables nearly all intrinsics except the ones listed in 507 // the following switch statement. 508 if (!InlineNatives) { 509 switch (id) { 510 case vmIntrinsics::_indexOfL: 511 case vmIntrinsics::_indexOfU: 512 case vmIntrinsics::_indexOfUL: 513 case vmIntrinsics::_indexOfIL: 514 case vmIntrinsics::_indexOfIU: 515 case vmIntrinsics::_indexOfIUL: 516 case vmIntrinsics::_indexOfU_char: 517 case vmIntrinsics::_compareToL: 518 case vmIntrinsics::_compareToU: 519 case vmIntrinsics::_compareToLU: 520 case vmIntrinsics::_compareToUL: 521 case vmIntrinsics::_equalsL: 522 case vmIntrinsics::_equalsU: 523 case vmIntrinsics::_equalsC: 524 case vmIntrinsics::_getCharStringU: 525 case vmIntrinsics::_putCharStringU: 526 case vmIntrinsics::_compressStringC: 527 case vmIntrinsics::_compressStringB: 528 case vmIntrinsics::_inflateStringC: 529 case vmIntrinsics::_inflateStringB: 530 case vmIntrinsics::_getAndAddInt: 531 case vmIntrinsics::_getAndAddLong: 532 case vmIntrinsics::_getAndSetInt: 533 case vmIntrinsics::_getAndSetLong: 534 case vmIntrinsics::_getAndSetReference: 535 case vmIntrinsics::_loadFence: 536 case vmIntrinsics::_storeFence: 537 case vmIntrinsics::_fullFence: 538 case vmIntrinsics::_hasNegatives: 539 case vmIntrinsics::_Reference_get: 540 break; 541 default: 542 return true; 543 } 544 } 545 546 switch (id) { 547 case vmIntrinsics::_isInstance: 548 case vmIntrinsics::_isAssignableFrom: 549 case vmIntrinsics::_getModifiers: 550 case vmIntrinsics::_isInterface: 551 case vmIntrinsics::_isArray: 552 case vmIntrinsics::_isPrimitive: 553 case vmIntrinsics::_getSuperclass: 554 case vmIntrinsics::_Class_cast: 555 case vmIntrinsics::_getLength: 556 case vmIntrinsics::_newArray: 557 case vmIntrinsics::_getClass: 558 if (!InlineClassNatives) return true; 559 break; 560 case vmIntrinsics::_currentThread: 561 case vmIntrinsics::_isInterrupted: 562 if (!InlineThreadNatives) return true; 563 break; 564 case vmIntrinsics::_floatToRawIntBits: 565 case vmIntrinsics::_intBitsToFloat: 566 case vmIntrinsics::_doubleToRawLongBits: 567 case vmIntrinsics::_longBitsToDouble: 568 case vmIntrinsics::_dabs: 569 case vmIntrinsics::_dsqrt: 570 case vmIntrinsics::_dsin: 571 case vmIntrinsics::_dcos: 572 case vmIntrinsics::_dtan: 573 case vmIntrinsics::_dlog: 574 case vmIntrinsics::_dexp: 575 case vmIntrinsics::_dpow: 576 case vmIntrinsics::_dlog10: 577 case vmIntrinsics::_datan2: 578 case vmIntrinsics::_min: 579 case vmIntrinsics::_max: 580 case vmIntrinsics::_floatToIntBits: 581 case vmIntrinsics::_doubleToLongBits: 582 if (!InlineMathNatives) return true; 583 break; 584 case vmIntrinsics::_fmaD: 585 case vmIntrinsics::_fmaF: 586 if (!InlineMathNatives || !UseFMA) return true; 587 break; 588 case vmIntrinsics::_arraycopy: 589 if (!InlineArrayCopy) return true; 590 break; 591 case vmIntrinsics::_updateCRC32: 592 case vmIntrinsics::_updateBytesCRC32: 593 case vmIntrinsics::_updateByteBufferCRC32: 594 if (!UseCRC32Intrinsics) return true; 595 break; 596 case vmIntrinsics::_getReference: 597 case vmIntrinsics::_getBoolean: 598 case vmIntrinsics::_getByte: 599 case vmIntrinsics::_getShort: 600 case vmIntrinsics::_getChar: 601 case vmIntrinsics::_getInt: 602 case vmIntrinsics::_getLong: 603 case vmIntrinsics::_getFloat: 604 case vmIntrinsics::_getDouble: 605 case vmIntrinsics::_putReference: 606 case vmIntrinsics::_putBoolean: 607 case vmIntrinsics::_putByte: 608 case vmIntrinsics::_putShort: 609 case vmIntrinsics::_putChar: 610 case vmIntrinsics::_putInt: 611 case vmIntrinsics::_putLong: 612 case vmIntrinsics::_putFloat: 613 case vmIntrinsics::_putDouble: 614 case vmIntrinsics::_getReferenceVolatile: 615 case vmIntrinsics::_getBooleanVolatile: 616 case vmIntrinsics::_getByteVolatile: 617 case vmIntrinsics::_getShortVolatile: 618 case vmIntrinsics::_getCharVolatile: 619 case vmIntrinsics::_getIntVolatile: 620 case vmIntrinsics::_getLongVolatile: 621 case vmIntrinsics::_getFloatVolatile: 622 case vmIntrinsics::_getDoubleVolatile: 623 case vmIntrinsics::_putReferenceVolatile: 624 case vmIntrinsics::_putBooleanVolatile: 625 case vmIntrinsics::_putByteVolatile: 626 case vmIntrinsics::_putShortVolatile: 627 case vmIntrinsics::_putCharVolatile: 628 case vmIntrinsics::_putIntVolatile: 629 case vmIntrinsics::_putLongVolatile: 630 case vmIntrinsics::_putFloatVolatile: 631 case vmIntrinsics::_putDoubleVolatile: 632 case vmIntrinsics::_getReferenceAcquire: 633 case vmIntrinsics::_getBooleanAcquire: 634 case vmIntrinsics::_getByteAcquire: 635 case vmIntrinsics::_getShortAcquire: 636 case vmIntrinsics::_getCharAcquire: 637 case vmIntrinsics::_getIntAcquire: 638 case vmIntrinsics::_getLongAcquire: 639 case vmIntrinsics::_getFloatAcquire: 640 case vmIntrinsics::_getDoubleAcquire: 641 case vmIntrinsics::_putReferenceRelease: 642 case vmIntrinsics::_putBooleanRelease: 643 case vmIntrinsics::_putByteRelease: 644 case vmIntrinsics::_putShortRelease: 645 case vmIntrinsics::_putCharRelease: 646 case vmIntrinsics::_putIntRelease: 647 case vmIntrinsics::_putLongRelease: 648 case vmIntrinsics::_putFloatRelease: 649 case vmIntrinsics::_putDoubleRelease: 650 case vmIntrinsics::_getReferenceOpaque: 651 case vmIntrinsics::_getBooleanOpaque: 652 case vmIntrinsics::_getByteOpaque: 653 case vmIntrinsics::_getShortOpaque: 654 case vmIntrinsics::_getCharOpaque: 655 case vmIntrinsics::_getIntOpaque: 656 case vmIntrinsics::_getLongOpaque: 657 case vmIntrinsics::_getFloatOpaque: 658 case vmIntrinsics::_getDoubleOpaque: 659 case vmIntrinsics::_putReferenceOpaque: 660 case vmIntrinsics::_putBooleanOpaque: 661 case vmIntrinsics::_putByteOpaque: 662 case vmIntrinsics::_putShortOpaque: 663 case vmIntrinsics::_putCharOpaque: 664 case vmIntrinsics::_putIntOpaque: 665 case vmIntrinsics::_putLongOpaque: 666 case vmIntrinsics::_putFloatOpaque: 667 case vmIntrinsics::_putDoubleOpaque: 668 case vmIntrinsics::_getAndAddInt: 669 case vmIntrinsics::_getAndAddLong: 670 case vmIntrinsics::_getAndSetInt: 671 case vmIntrinsics::_getAndSetLong: 672 case vmIntrinsics::_getAndSetReference: 673 case vmIntrinsics::_loadFence: 674 case vmIntrinsics::_storeFence: 675 case vmIntrinsics::_fullFence: 676 case vmIntrinsics::_compareAndSetLong: 677 case vmIntrinsics::_weakCompareAndSetLong: 678 case vmIntrinsics::_weakCompareAndSetLongPlain: 679 case vmIntrinsics::_weakCompareAndSetLongAcquire: 680 case vmIntrinsics::_weakCompareAndSetLongRelease: 681 case vmIntrinsics::_compareAndSetInt: 682 case vmIntrinsics::_weakCompareAndSetInt: 683 case vmIntrinsics::_weakCompareAndSetIntPlain: 684 case vmIntrinsics::_weakCompareAndSetIntAcquire: 685 case vmIntrinsics::_weakCompareAndSetIntRelease: 686 case vmIntrinsics::_compareAndSetReference: 687 case vmIntrinsics::_weakCompareAndSetReference: 688 case vmIntrinsics::_weakCompareAndSetReferencePlain: 689 case vmIntrinsics::_weakCompareAndSetReferenceAcquire: 690 case vmIntrinsics::_weakCompareAndSetReferenceRelease: 691 case vmIntrinsics::_compareAndExchangeInt: 692 case vmIntrinsics::_compareAndExchangeIntAcquire: 693 case vmIntrinsics::_compareAndExchangeIntRelease: 694 case vmIntrinsics::_compareAndExchangeLong: 695 case vmIntrinsics::_compareAndExchangeLongAcquire: 696 case vmIntrinsics::_compareAndExchangeLongRelease: 697 case vmIntrinsics::_compareAndExchangeReference: 698 case vmIntrinsics::_compareAndExchangeReferenceAcquire: 699 case vmIntrinsics::_compareAndExchangeReferenceRelease: 700 if (!InlineUnsafeOps) return true; 701 break; 702 case vmIntrinsics::_getShortUnaligned: 703 case vmIntrinsics::_getCharUnaligned: 704 case vmIntrinsics::_getIntUnaligned: 705 case vmIntrinsics::_getLongUnaligned: 706 case vmIntrinsics::_putShortUnaligned: 707 case vmIntrinsics::_putCharUnaligned: 708 case vmIntrinsics::_putIntUnaligned: 709 case vmIntrinsics::_putLongUnaligned: 710 case vmIntrinsics::_allocateInstance: 711 if (!InlineUnsafeOps || !UseUnalignedAccesses) return true; 712 break; 713 case vmIntrinsics::_hashCode: 714 if (!InlineObjectHash) return true; 715 break; 716 case vmIntrinsics::_aescrypt_encryptBlock: 717 case vmIntrinsics::_aescrypt_decryptBlock: 718 if (!UseAESIntrinsics) return true; 719 break; 720 case vmIntrinsics::_cipherBlockChaining_encryptAESCrypt: 721 case vmIntrinsics::_cipherBlockChaining_decryptAESCrypt: 722 if (!UseAESIntrinsics) return true; 723 break; 724 case vmIntrinsics::_counterMode_AESCrypt: 725 if (!UseAESCTRIntrinsics) return true; 726 break; 727 case vmIntrinsics::_sha_implCompress: 728 if (!UseSHA1Intrinsics) return true; 729 break; 730 case vmIntrinsics::_sha2_implCompress: 731 if (!UseSHA256Intrinsics) return true; 732 break; 733 case vmIntrinsics::_sha5_implCompress: 734 if (!UseSHA512Intrinsics) return true; 735 break; 736 case vmIntrinsics::_digestBase_implCompressMB: 737 if (!(UseSHA1Intrinsics || UseSHA256Intrinsics || UseSHA512Intrinsics)) return true; 738 break; 739 case vmIntrinsics::_ghash_processBlocks: 740 if (!UseGHASHIntrinsics) return true; 741 break; 742 case vmIntrinsics::_base64_encodeBlock: 743 if (!UseBASE64Intrinsics) return true; 744 break; 745 case vmIntrinsics::_updateBytesCRC32C: 746 case vmIntrinsics::_updateDirectByteBufferCRC32C: 747 if (!UseCRC32CIntrinsics) return true; 748 break; 749 case vmIntrinsics::_vectorizedMismatch: 750 if (!UseVectorizedMismatchIntrinsic) return true; 751 break; 752 case vmIntrinsics::_updateBytesAdler32: 753 case vmIntrinsics::_updateByteBufferAdler32: 754 if (!UseAdler32Intrinsics) return true; 755 break; 756 case vmIntrinsics::_copyMemory: 757 if (!InlineArrayCopy || !InlineUnsafeOps) return true; 758 break; 759 #ifdef COMPILER1 760 case vmIntrinsics::_checkIndex: 761 if (!InlineNIOCheckIndex) return true; 762 break; 763 #endif // COMPILER1 764 #ifdef COMPILER2 765 case vmIntrinsics::_clone: 766 #if INCLUDE_ZGC 767 if (UseZGC) return true; 768 #endif 769 case vmIntrinsics::_copyOf: 770 case vmIntrinsics::_copyOfRange: 771 // These intrinsics use both the objectcopy and the arraycopy 772 // intrinsic mechanism. 773 if (!InlineObjectCopy || !InlineArrayCopy) return true; 774 break; 775 case vmIntrinsics::_compareToL: 776 case vmIntrinsics::_compareToU: 777 case vmIntrinsics::_compareToLU: 778 case vmIntrinsics::_compareToUL: 779 if (!SpecialStringCompareTo) return true; 780 break; 781 case vmIntrinsics::_indexOfL: 782 case vmIntrinsics::_indexOfU: 783 case vmIntrinsics::_indexOfUL: 784 case vmIntrinsics::_indexOfIL: 785 case vmIntrinsics::_indexOfIU: 786 case vmIntrinsics::_indexOfIUL: 787 case vmIntrinsics::_indexOfU_char: 788 if (!SpecialStringIndexOf) return true; 789 break; 790 case vmIntrinsics::_equalsL: 791 case vmIntrinsics::_equalsU: 792 if (!SpecialStringEquals) return true; 793 break; 794 case vmIntrinsics::_equalsB: 795 case vmIntrinsics::_equalsC: 796 if (!SpecialArraysEquals) return true; 797 break; 798 case vmIntrinsics::_encodeISOArray: 799 case vmIntrinsics::_encodeByteISOArray: 800 if (!SpecialEncodeISOArray) return true; 801 break; 802 case vmIntrinsics::_getCallerClass: 803 if (!InlineReflectionGetCallerClass) return true; 804 break; 805 case vmIntrinsics::_multiplyToLen: 806 if (!UseMultiplyToLenIntrinsic) return true; 807 break; 808 case vmIntrinsics::_squareToLen: 809 if (!UseSquareToLenIntrinsic) return true; 810 break; 811 case vmIntrinsics::_mulAdd: 812 if (!UseMulAddIntrinsic) return true; 813 break; 814 case vmIntrinsics::_montgomeryMultiply: 815 if (!UseMontgomeryMultiplyIntrinsic) return true; 816 break; 817 case vmIntrinsics::_montgomerySquare: 818 if (!UseMontgomerySquareIntrinsic) return true; 819 break; 820 case vmIntrinsics::_addExactI: 821 case vmIntrinsics::_addExactL: 822 case vmIntrinsics::_decrementExactI: 823 case vmIntrinsics::_decrementExactL: 824 case vmIntrinsics::_incrementExactI: 825 case vmIntrinsics::_incrementExactL: 826 case vmIntrinsics::_multiplyExactI: 827 case vmIntrinsics::_multiplyExactL: 828 case vmIntrinsics::_negateExactI: 829 case vmIntrinsics::_negateExactL: 830 case vmIntrinsics::_subtractExactI: 831 case vmIntrinsics::_subtractExactL: 832 if (!UseMathExactIntrinsics || !InlineMathNatives) return true; 833 break; 834 case vmIntrinsics::_isDigit: 835 case vmIntrinsics::_isLowerCase: 836 case vmIntrinsics::_isUpperCase: 837 case vmIntrinsics::_isWhitespace: 838 if (!UseCharacterCompareIntrinsics) return true; 839 break; 840 #endif // COMPILER2 841 default: 842 return false; 843 } 844 845 return false; 846 } 847 848 #define VM_INTRINSIC_INITIALIZE(id, klass, name, sig, flags) #id "\0" 849 static const char* vm_intrinsic_name_bodies = 850 VM_INTRINSICS_DO(VM_INTRINSIC_INITIALIZE, 851 VM_SYMBOL_IGNORE, VM_SYMBOL_IGNORE, VM_SYMBOL_IGNORE, VM_ALIAS_IGNORE); 852 853 static const char* vm_intrinsic_name_table[vmIntrinsics::ID_LIMIT]; 854 855 const char* vmIntrinsics::name_at(vmIntrinsics::ID id) { 856 const char** nt = &vm_intrinsic_name_table[0]; 857 if (nt[_none] == NULL) { 858 char* string = (char*) &vm_intrinsic_name_bodies[0]; 859 for (int index = FIRST_ID; index < ID_LIMIT; index++) { 860 nt[index] = string; 861 string += strlen(string); // skip string body 862 string += 1; // skip trailing null 863 } 864 assert(!strcmp(nt[_hashCode], "_hashCode"), "lined up"); 865 nt[_none] = "_none"; 866 } 867 if ((uint)id < (uint)ID_LIMIT) 868 return vm_intrinsic_name_table[(uint)id]; 869 else 870 return "(unknown intrinsic)"; 871 } 872 873 // These are flag-matching functions: 874 inline bool match_F_R(jshort flags) { 875 const int req = 0; 876 const int neg = JVM_ACC_STATIC | JVM_ACC_SYNCHRONIZED; 877 return (flags & (req | neg)) == req; 878 } 879 inline bool match_F_Y(jshort flags) { 880 const int req = JVM_ACC_SYNCHRONIZED; 881 const int neg = JVM_ACC_STATIC; 882 return (flags & (req | neg)) == req; 883 } 884 inline bool match_F_RN(jshort flags) { 885 const int req = JVM_ACC_NATIVE; 886 const int neg = JVM_ACC_STATIC | JVM_ACC_SYNCHRONIZED; 887 return (flags & (req | neg)) == req; 888 } 889 inline bool match_F_S(jshort flags) { 890 const int req = JVM_ACC_STATIC; 891 const int neg = JVM_ACC_SYNCHRONIZED; 892 return (flags & (req | neg)) == req; 893 } 894 inline bool match_F_SN(jshort flags) { 895 const int req = JVM_ACC_STATIC | JVM_ACC_NATIVE; 896 const int neg = JVM_ACC_SYNCHRONIZED; 897 return (flags & (req | neg)) == req; 898 } 899 inline bool match_F_RNY(jshort flags) { 900 const int req = JVM_ACC_NATIVE | JVM_ACC_SYNCHRONIZED; 901 const int neg = JVM_ACC_STATIC; 902 return (flags & (req | neg)) == req; 903 } 904 905 // These are for forming case labels: 906 #define ID3(x, y, z) (( jlong)(z) + \ 907 ((jlong)(y) << vmSymbols::log2_SID_LIMIT) + \ 908 ((jlong)(x) << (2*vmSymbols::log2_SID_LIMIT)) ) 909 #define SID_ENUM(n) vmSymbols::VM_SYMBOL_ENUM_NAME(n) 910 911 vmIntrinsics::ID vmIntrinsics::find_id_impl(vmSymbols::SID holder, 912 vmSymbols::SID name, 913 vmSymbols::SID sig, 914 jshort flags) { 915 assert((int)vmSymbols::SID_LIMIT <= (1<<vmSymbols::log2_SID_LIMIT), "must fit"); 916 917 // Let the C compiler build the decision tree. 918 919 #define VM_INTRINSIC_CASE(id, klass, name, sig, fcode) \ 920 case ID3(SID_ENUM(klass), SID_ENUM(name), SID_ENUM(sig)): \ 921 if (!match_##fcode(flags)) break; \ 922 return id; 923 924 switch (ID3(holder, name, sig)) { 925 VM_INTRINSICS_DO(VM_INTRINSIC_CASE, 926 VM_SYMBOL_IGNORE, VM_SYMBOL_IGNORE, VM_SYMBOL_IGNORE, VM_ALIAS_IGNORE); 927 } 928 return vmIntrinsics::_none; 929 930 #undef VM_INTRINSIC_CASE 931 } 932 933 934 const char* vmIntrinsics::short_name_as_C_string(vmIntrinsics::ID id, char* buf, int buflen) { 935 const char* str = name_at(id); 936 #ifndef PRODUCT 937 const char* kname = vmSymbols::name_for(class_for(id)); 938 const char* mname = vmSymbols::name_for(name_for(id)); 939 const char* sname = vmSymbols::name_for(signature_for(id)); 940 const char* fname = ""; 941 switch (flags_for(id)) { 942 case F_Y: fname = "synchronized "; break; 943 case F_RN: fname = "native "; break; 944 case F_SN: fname = "native static "; break; 945 case F_S: fname = "static "; break; 946 case F_RNY:fname = "native synchronized "; break; 947 default: break; 948 } 949 const char* kptr = strrchr(kname, '/'); 950 if (kptr != NULL) kname = kptr + 1; 951 int len = jio_snprintf(buf, buflen, "%s: %s%s.%s%s", 952 str, fname, kname, mname, sname); 953 if (len < buflen) 954 str = buf; 955 #endif //PRODUCT 956 return str; 957 } 958 959 960 // These are to get information about intrinsics. 961 962 #define ID4(x, y, z, f) ((ID3(x, y, z) << vmIntrinsics::log2_FLAG_LIMIT) | (jlong) (f)) 963 964 static const jlong intrinsic_info_array[vmIntrinsics::ID_LIMIT+1] = { 965 #define VM_INTRINSIC_INFO(ignore_id, klass, name, sig, fcode) \ 966 ID4(SID_ENUM(klass), SID_ENUM(name), SID_ENUM(sig), vmIntrinsics::fcode), 967 968 0, VM_INTRINSICS_DO(VM_INTRINSIC_INFO, 969 VM_SYMBOL_IGNORE, VM_SYMBOL_IGNORE, VM_SYMBOL_IGNORE, VM_ALIAS_IGNORE) 970 0 971 #undef VM_INTRINSIC_INFO 972 }; 973 974 inline jlong intrinsic_info(vmIntrinsics::ID id) { 975 return intrinsic_info_array[vmIntrinsics::ID_from((int)id)]; 976 } 977 978 vmSymbols::SID vmIntrinsics::class_for(vmIntrinsics::ID id) { 979 jlong info = intrinsic_info(id); 980 int shift = 2*vmSymbols::log2_SID_LIMIT + log2_FLAG_LIMIT, mask = right_n_bits(vmSymbols::log2_SID_LIMIT); 981 assert(((ID4(1021,1022,1023,15) >> shift) & mask) == 1021, ""); 982 return vmSymbols::SID( (info >> shift) & mask ); 983 } 984 985 vmSymbols::SID vmIntrinsics::name_for(vmIntrinsics::ID id) { 986 jlong info = intrinsic_info(id); 987 int shift = vmSymbols::log2_SID_LIMIT + log2_FLAG_LIMIT, mask = right_n_bits(vmSymbols::log2_SID_LIMIT); 988 assert(((ID4(1021,1022,1023,15) >> shift) & mask) == 1022, ""); 989 return vmSymbols::SID( (info >> shift) & mask ); 990 } 991 992 vmSymbols::SID vmIntrinsics::signature_for(vmIntrinsics::ID id) { 993 jlong info = intrinsic_info(id); 994 int shift = log2_FLAG_LIMIT, mask = right_n_bits(vmSymbols::log2_SID_LIMIT); 995 assert(((ID4(1021,1022,1023,15) >> shift) & mask) == 1023, ""); 996 return vmSymbols::SID( (info >> shift) & mask ); 997 } 998 999 vmIntrinsics::Flags vmIntrinsics::flags_for(vmIntrinsics::ID id) { 1000 jlong info = intrinsic_info(id); 1001 int shift = 0, mask = right_n_bits(log2_FLAG_LIMIT); 1002 assert(((ID4(1021,1022,1023,15) >> shift) & mask) == 15, ""); 1003 return Flags( (info >> shift) & mask ); 1004 } 1005 1006 1007 #ifndef PRODUCT 1008 // verify_method performs an extra check on a matched intrinsic method 1009 1010 static bool match_method(Method* m, Symbol* n, Symbol* s) { 1011 return (m->name() == n && 1012 m->signature() == s); 1013 } 1014 1015 static vmIntrinsics::ID match_method_with_klass(Method* m, Symbol* mk) { 1016 #define VM_INTRINSIC_MATCH(id, klassname, namepart, sigpart, flags) \ 1017 { Symbol* k = vmSymbols::klassname(); \ 1018 if (mk == k) { \ 1019 Symbol* n = vmSymbols::namepart(); \ 1020 Symbol* s = vmSymbols::sigpart(); \ 1021 if (match_method(m, n, s)) \ 1022 return vmIntrinsics::id; \ 1023 } } 1024 VM_INTRINSICS_DO(VM_INTRINSIC_MATCH, 1025 VM_SYMBOL_IGNORE, VM_SYMBOL_IGNORE, VM_SYMBOL_IGNORE, VM_ALIAS_IGNORE); 1026 return vmIntrinsics::_none; 1027 #undef VM_INTRINSIC_MATCH 1028 } 1029 1030 void vmIntrinsics::verify_method(ID actual_id, Method* m) { 1031 Symbol* mk = m->method_holder()->name(); 1032 ID declared_id = match_method_with_klass(m, mk); 1033 1034 if (declared_id == actual_id) return; // success 1035 1036 if (declared_id == _none && actual_id != _none && mk == vmSymbols::java_lang_StrictMath()) { 1037 // Here are a few special cases in StrictMath not declared in vmSymbols.hpp. 1038 switch (actual_id) { 1039 case _min: 1040 case _max: 1041 case _dsqrt: 1042 declared_id = match_method_with_klass(m, vmSymbols::java_lang_Math()); 1043 if (declared_id == actual_id) return; // acceptable alias 1044 break; 1045 default: 1046 break; 1047 } 1048 } 1049 1050 const char* declared_name = name_at(declared_id); 1051 const char* actual_name = name_at(actual_id); 1052 methodHandle mh = m; 1053 m = NULL; 1054 ttyLocker ttyl; 1055 if (xtty != NULL) { 1056 xtty->begin_elem("intrinsic_misdeclared actual='%s' declared='%s'", 1057 actual_name, declared_name); 1058 xtty->method(mh); 1059 xtty->end_elem("%s", ""); 1060 } 1061 if (PrintMiscellaneous && (WizardMode || Verbose)) { 1062 tty->print_cr("*** misidentified method; %s(%d) should be %s(%d):", 1063 declared_name, declared_id, actual_name, actual_id); 1064 mh()->print_short_name(tty); 1065 tty->cr(); 1066 } 1067 } 1068 #endif //PRODUCT