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->byte_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 return true; 383 default: 384 return false; 385 } 386 } 387 388 bool vmIntrinsics::can_trap(vmIntrinsics::ID id) { 389 assert(id != vmIntrinsics::_none, "must be a VM intrinsic"); 390 switch(id) { 391 #ifdef JFR_HAVE_INTRINSICS 392 case vmIntrinsics::_counterTime: 393 case vmIntrinsics::_getClassId: 394 #endif 395 case vmIntrinsics::_currentTimeMillis: 396 case vmIntrinsics::_nanoTime: 397 case vmIntrinsics::_floatToRawIntBits: 398 case vmIntrinsics::_intBitsToFloat: 399 case vmIntrinsics::_doubleToRawLongBits: 400 case vmIntrinsics::_longBitsToDouble: 401 case vmIntrinsics::_currentThread: 402 case vmIntrinsics::_dabs: 403 case vmIntrinsics::_dsqrt: 404 case vmIntrinsics::_dsin: 405 case vmIntrinsics::_dcos: 406 case vmIntrinsics::_dtan: 407 case vmIntrinsics::_dlog: 408 case vmIntrinsics::_dlog10: 409 case vmIntrinsics::_dexp: 410 case vmIntrinsics::_dpow: 411 case vmIntrinsics::_updateCRC32: 412 case vmIntrinsics::_updateBytesCRC32: 413 case vmIntrinsics::_updateByteBufferCRC32: 414 case vmIntrinsics::_vectorizedMismatch: 415 case vmIntrinsics::_fmaD: 416 case vmIntrinsics::_fmaF: 417 return false; 418 default: 419 return true; 420 } 421 } 422 423 // Some intrinsics produce different results if they are not pinned 424 bool vmIntrinsics::should_be_pinned(vmIntrinsics::ID id) { 425 assert(id != vmIntrinsics::_none, "must be a VM intrinsic"); 426 switch(id) { 427 #ifdef JFR_HAVE_INTRINSICS 428 case vmIntrinsics::_counterTime: 429 #endif 430 case vmIntrinsics::_currentTimeMillis: 431 case vmIntrinsics::_nanoTime: 432 return true; 433 default: 434 return false; 435 } 436 } 437 438 bool vmIntrinsics::does_virtual_dispatch(vmIntrinsics::ID id) { 439 assert(id != vmIntrinsics::_none, "must be a VM intrinsic"); 440 switch(id) { 441 case vmIntrinsics::_hashCode: 442 case vmIntrinsics::_clone: 443 return true; 444 break; 445 default: 446 return false; 447 } 448 } 449 450 int vmIntrinsics::predicates_needed(vmIntrinsics::ID id) { 451 assert(id != vmIntrinsics::_none, "must be a VM intrinsic"); 452 switch (id) { 453 case vmIntrinsics::_cipherBlockChaining_encryptAESCrypt: 454 case vmIntrinsics::_cipherBlockChaining_decryptAESCrypt: 455 case vmIntrinsics::_counterMode_AESCrypt: 456 return 1; 457 case vmIntrinsics::_digestBase_implCompressMB: 458 return 3; 459 default: 460 return 0; 461 } 462 } 463 464 bool vmIntrinsics::is_intrinsic_available(vmIntrinsics::ID id) { 465 return !vmIntrinsics::is_intrinsic_disabled(id) && 466 !vmIntrinsics::is_disabled_by_flags(id); 467 } 468 469 bool vmIntrinsics::is_intrinsic_disabled(vmIntrinsics::ID id) { 470 assert(id != vmIntrinsics::_none, "must be a VM intrinsic"); 471 472 // Canonicalize DisableIntrinsic to contain only ',' as a separator. 473 // Note, DirectiveSet may not be created at this point yet since this code 474 // is called from initial stub geenration code. 475 char* local_list = (char*)DirectiveSet::canonicalize_disableintrinsic(DisableIntrinsic); 476 477 bool found = false; 478 char* token = strtok(local_list, ","); 479 while (token != NULL) { 480 if (strcmp(token, vmIntrinsics::name_at(id)) == 0) { 481 found = true; 482 break; 483 } else { 484 token = strtok(NULL, ","); 485 } 486 } 487 488 FREE_C_HEAP_ARRAY(char, local_list); 489 return found; 490 } 491 492 493 bool vmIntrinsics::is_disabled_by_flags(const methodHandle& method) { 494 vmIntrinsics::ID id = method->intrinsic_id(); 495 assert(id != vmIntrinsics::_none, "must be a VM intrinsic"); 496 return is_disabled_by_flags(id); 497 } 498 499 bool vmIntrinsics::is_disabled_by_flags(vmIntrinsics::ID id) { 500 assert(id != vmIntrinsics::_none, "must be a VM intrinsic"); 501 502 // -XX:-InlineNatives disables nearly all intrinsics except the ones listed in 503 // the following switch statement. 504 if (!InlineNatives) { 505 switch (id) { 506 case vmIntrinsics::_indexOfL: 507 case vmIntrinsics::_indexOfU: 508 case vmIntrinsics::_indexOfUL: 509 case vmIntrinsics::_indexOfIL: 510 case vmIntrinsics::_indexOfIU: 511 case vmIntrinsics::_indexOfIUL: 512 case vmIntrinsics::_indexOfU_char: 513 case vmIntrinsics::_compareToL: 514 case vmIntrinsics::_compareToU: 515 case vmIntrinsics::_compareToLU: 516 case vmIntrinsics::_compareToUL: 517 case vmIntrinsics::_equalsL: 518 case vmIntrinsics::_equalsU: 519 case vmIntrinsics::_equalsC: 520 case vmIntrinsics::_getCharStringU: 521 case vmIntrinsics::_putCharStringU: 522 case vmIntrinsics::_compressStringC: 523 case vmIntrinsics::_compressStringB: 524 case vmIntrinsics::_inflateStringC: 525 case vmIntrinsics::_inflateStringB: 526 case vmIntrinsics::_getAndAddInt: 527 case vmIntrinsics::_getAndAddLong: 528 case vmIntrinsics::_getAndSetInt: 529 case vmIntrinsics::_getAndSetLong: 530 case vmIntrinsics::_getAndSetObject: 531 case vmIntrinsics::_loadFence: 532 case vmIntrinsics::_storeFence: 533 case vmIntrinsics::_fullFence: 534 case vmIntrinsics::_hasNegatives: 535 case vmIntrinsics::_Reference_get: 536 break; 537 default: 538 return true; 539 } 540 } 541 542 switch (id) { 543 case vmIntrinsics::_isInstance: 544 case vmIntrinsics::_isAssignableFrom: 545 case vmIntrinsics::_getModifiers: 546 case vmIntrinsics::_isInterface: 547 case vmIntrinsics::_isArray: 548 case vmIntrinsics::_isPrimitive: 549 case vmIntrinsics::_getSuperclass: 550 case vmIntrinsics::_Class_cast: 551 case vmIntrinsics::_getLength: 552 case vmIntrinsics::_newArray: 553 case vmIntrinsics::_getClass: 554 if (!InlineClassNatives) return true; 555 break; 556 case vmIntrinsics::_currentThread: 557 case vmIntrinsics::_isInterrupted: 558 if (!InlineThreadNatives) return true; 559 break; 560 case vmIntrinsics::_floatToRawIntBits: 561 case vmIntrinsics::_intBitsToFloat: 562 case vmIntrinsics::_doubleToRawLongBits: 563 case vmIntrinsics::_longBitsToDouble: 564 case vmIntrinsics::_dabs: 565 case vmIntrinsics::_dsqrt: 566 case vmIntrinsics::_dsin: 567 case vmIntrinsics::_dcos: 568 case vmIntrinsics::_dtan: 569 case vmIntrinsics::_dlog: 570 case vmIntrinsics::_dexp: 571 case vmIntrinsics::_dpow: 572 case vmIntrinsics::_dlog10: 573 case vmIntrinsics::_datan2: 574 case vmIntrinsics::_min: 575 case vmIntrinsics::_max: 576 case vmIntrinsics::_floatToIntBits: 577 case vmIntrinsics::_doubleToLongBits: 578 if (!InlineMathNatives) return true; 579 break; 580 case vmIntrinsics::_fmaD: 581 case vmIntrinsics::_fmaF: 582 if (!InlineMathNatives || !UseFMA) return true; 583 break; 584 case vmIntrinsics::_arraycopy: 585 if (!InlineArrayCopy) return true; 586 break; 587 case vmIntrinsics::_updateCRC32: 588 case vmIntrinsics::_updateBytesCRC32: 589 case vmIntrinsics::_updateByteBufferCRC32: 590 if (!UseCRC32Intrinsics) return true; 591 break; 592 case vmIntrinsics::_getObject: 593 case vmIntrinsics::_getBoolean: 594 case vmIntrinsics::_getByte: 595 case vmIntrinsics::_getShort: 596 case vmIntrinsics::_getChar: 597 case vmIntrinsics::_getInt: 598 case vmIntrinsics::_getLong: 599 case vmIntrinsics::_getFloat: 600 case vmIntrinsics::_getDouble: 601 case vmIntrinsics::_putObject: 602 case vmIntrinsics::_putBoolean: 603 case vmIntrinsics::_putByte: 604 case vmIntrinsics::_putShort: 605 case vmIntrinsics::_putChar: 606 case vmIntrinsics::_putInt: 607 case vmIntrinsics::_putLong: 608 case vmIntrinsics::_putFloat: 609 case vmIntrinsics::_putDouble: 610 case vmIntrinsics::_getObjectVolatile: 611 case vmIntrinsics::_getBooleanVolatile: 612 case vmIntrinsics::_getByteVolatile: 613 case vmIntrinsics::_getShortVolatile: 614 case vmIntrinsics::_getCharVolatile: 615 case vmIntrinsics::_getIntVolatile: 616 case vmIntrinsics::_getLongVolatile: 617 case vmIntrinsics::_getFloatVolatile: 618 case vmIntrinsics::_getDoubleVolatile: 619 case vmIntrinsics::_putObjectVolatile: 620 case vmIntrinsics::_putBooleanVolatile: 621 case vmIntrinsics::_putByteVolatile: 622 case vmIntrinsics::_putShortVolatile: 623 case vmIntrinsics::_putCharVolatile: 624 case vmIntrinsics::_putIntVolatile: 625 case vmIntrinsics::_putLongVolatile: 626 case vmIntrinsics::_putFloatVolatile: 627 case vmIntrinsics::_putDoubleVolatile: 628 case vmIntrinsics::_getObjectAcquire: 629 case vmIntrinsics::_getBooleanAcquire: 630 case vmIntrinsics::_getByteAcquire: 631 case vmIntrinsics::_getShortAcquire: 632 case vmIntrinsics::_getCharAcquire: 633 case vmIntrinsics::_getIntAcquire: 634 case vmIntrinsics::_getLongAcquire: 635 case vmIntrinsics::_getFloatAcquire: 636 case vmIntrinsics::_getDoubleAcquire: 637 case vmIntrinsics::_putObjectRelease: 638 case vmIntrinsics::_putBooleanRelease: 639 case vmIntrinsics::_putByteRelease: 640 case vmIntrinsics::_putShortRelease: 641 case vmIntrinsics::_putCharRelease: 642 case vmIntrinsics::_putIntRelease: 643 case vmIntrinsics::_putLongRelease: 644 case vmIntrinsics::_putFloatRelease: 645 case vmIntrinsics::_putDoubleRelease: 646 case vmIntrinsics::_getObjectOpaque: 647 case vmIntrinsics::_getBooleanOpaque: 648 case vmIntrinsics::_getByteOpaque: 649 case vmIntrinsics::_getShortOpaque: 650 case vmIntrinsics::_getCharOpaque: 651 case vmIntrinsics::_getIntOpaque: 652 case vmIntrinsics::_getLongOpaque: 653 case vmIntrinsics::_getFloatOpaque: 654 case vmIntrinsics::_getDoubleOpaque: 655 case vmIntrinsics::_putObjectOpaque: 656 case vmIntrinsics::_putBooleanOpaque: 657 case vmIntrinsics::_putByteOpaque: 658 case vmIntrinsics::_putShortOpaque: 659 case vmIntrinsics::_putCharOpaque: 660 case vmIntrinsics::_putIntOpaque: 661 case vmIntrinsics::_putLongOpaque: 662 case vmIntrinsics::_putFloatOpaque: 663 case vmIntrinsics::_putDoubleOpaque: 664 case vmIntrinsics::_getAndAddInt: 665 case vmIntrinsics::_getAndAddLong: 666 case vmIntrinsics::_getAndSetInt: 667 case vmIntrinsics::_getAndSetLong: 668 case vmIntrinsics::_getAndSetObject: 669 case vmIntrinsics::_loadFence: 670 case vmIntrinsics::_storeFence: 671 case vmIntrinsics::_fullFence: 672 case vmIntrinsics::_compareAndSetLong: 673 case vmIntrinsics::_weakCompareAndSetLong: 674 case vmIntrinsics::_weakCompareAndSetLongPlain: 675 case vmIntrinsics::_weakCompareAndSetLongAcquire: 676 case vmIntrinsics::_weakCompareAndSetLongRelease: 677 case vmIntrinsics::_compareAndSetInt: 678 case vmIntrinsics::_weakCompareAndSetInt: 679 case vmIntrinsics::_weakCompareAndSetIntPlain: 680 case vmIntrinsics::_weakCompareAndSetIntAcquire: 681 case vmIntrinsics::_weakCompareAndSetIntRelease: 682 case vmIntrinsics::_compareAndSetObject: 683 case vmIntrinsics::_weakCompareAndSetObject: 684 case vmIntrinsics::_weakCompareAndSetObjectPlain: 685 case vmIntrinsics::_weakCompareAndSetObjectAcquire: 686 case vmIntrinsics::_weakCompareAndSetObjectRelease: 687 case vmIntrinsics::_compareAndExchangeInt: 688 case vmIntrinsics::_compareAndExchangeIntAcquire: 689 case vmIntrinsics::_compareAndExchangeIntRelease: 690 case vmIntrinsics::_compareAndExchangeLong: 691 case vmIntrinsics::_compareAndExchangeLongAcquire: 692 case vmIntrinsics::_compareAndExchangeLongRelease: 693 case vmIntrinsics::_compareAndExchangeObject: 694 case vmIntrinsics::_compareAndExchangeObjectAcquire: 695 case vmIntrinsics::_compareAndExchangeObjectRelease: 696 if (!InlineUnsafeOps) return true; 697 break; 698 case vmIntrinsics::_getShortUnaligned: 699 case vmIntrinsics::_getCharUnaligned: 700 case vmIntrinsics::_getIntUnaligned: 701 case vmIntrinsics::_getLongUnaligned: 702 case vmIntrinsics::_putShortUnaligned: 703 case vmIntrinsics::_putCharUnaligned: 704 case vmIntrinsics::_putIntUnaligned: 705 case vmIntrinsics::_putLongUnaligned: 706 case vmIntrinsics::_allocateInstance: 707 if (!InlineUnsafeOps || !UseUnalignedAccesses) return true; 708 break; 709 case vmIntrinsics::_hashCode: 710 if (!InlineObjectHash) return true; 711 break; 712 case vmIntrinsics::_aescrypt_encryptBlock: 713 case vmIntrinsics::_aescrypt_decryptBlock: 714 if (!UseAESIntrinsics) return true; 715 break; 716 case vmIntrinsics::_cipherBlockChaining_encryptAESCrypt: 717 case vmIntrinsics::_cipherBlockChaining_decryptAESCrypt: 718 if (!UseAESIntrinsics) return true; 719 break; 720 case vmIntrinsics::_counterMode_AESCrypt: 721 if (!UseAESCTRIntrinsics) return true; 722 break; 723 case vmIntrinsics::_sha_implCompress: 724 if (!UseSHA1Intrinsics) return true; 725 break; 726 case vmIntrinsics::_sha2_implCompress: 727 if (!UseSHA256Intrinsics) return true; 728 break; 729 case vmIntrinsics::_sha5_implCompress: 730 if (!UseSHA512Intrinsics) return true; 731 break; 732 case vmIntrinsics::_digestBase_implCompressMB: 733 if (!(UseSHA1Intrinsics || UseSHA256Intrinsics || UseSHA512Intrinsics)) return true; 734 break; 735 case vmIntrinsics::_ghash_processBlocks: 736 if (!UseGHASHIntrinsics) return true; 737 break; 738 case vmIntrinsics::_updateBytesCRC32C: 739 case vmIntrinsics::_updateDirectByteBufferCRC32C: 740 if (!UseCRC32CIntrinsics) return true; 741 break; 742 case vmIntrinsics::_vectorizedMismatch: 743 if (!UseVectorizedMismatchIntrinsic) return true; 744 break; 745 case vmIntrinsics::_updateBytesAdler32: 746 case vmIntrinsics::_updateByteBufferAdler32: 747 if (!UseAdler32Intrinsics) return true; 748 break; 749 case vmIntrinsics::_copyMemory: 750 if (!InlineArrayCopy || !InlineUnsafeOps) return true; 751 break; 752 #ifdef COMPILER1 753 case vmIntrinsics::_checkIndex: 754 if (!InlineNIOCheckIndex) return true; 755 break; 756 #endif // COMPILER1 757 #ifdef COMPILER2 758 case vmIntrinsics::_clone: 759 case vmIntrinsics::_copyOf: 760 case vmIntrinsics::_copyOfRange: 761 // These intrinsics use both the objectcopy and the arraycopy 762 // intrinsic mechanism. 763 if (!InlineObjectCopy || !InlineArrayCopy) return true; 764 break; 765 case vmIntrinsics::_compareToL: 766 case vmIntrinsics::_compareToU: 767 case vmIntrinsics::_compareToLU: 768 case vmIntrinsics::_compareToUL: 769 if (!SpecialStringCompareTo) return true; 770 break; 771 case vmIntrinsics::_indexOfL: 772 case vmIntrinsics::_indexOfU: 773 case vmIntrinsics::_indexOfUL: 774 case vmIntrinsics::_indexOfIL: 775 case vmIntrinsics::_indexOfIU: 776 case vmIntrinsics::_indexOfIUL: 777 case vmIntrinsics::_indexOfU_char: 778 if (!SpecialStringIndexOf) return true; 779 break; 780 case vmIntrinsics::_equalsL: 781 case vmIntrinsics::_equalsU: 782 if (!SpecialStringEquals) return true; 783 break; 784 case vmIntrinsics::_equalsB: 785 case vmIntrinsics::_equalsC: 786 if (!SpecialArraysEquals) return true; 787 break; 788 case vmIntrinsics::_encodeISOArray: 789 case vmIntrinsics::_encodeByteISOArray: 790 if (!SpecialEncodeISOArray) return true; 791 break; 792 case vmIntrinsics::_getCallerClass: 793 if (!InlineReflectionGetCallerClass) return true; 794 break; 795 case vmIntrinsics::_multiplyToLen: 796 if (!UseMultiplyToLenIntrinsic) return true; 797 break; 798 case vmIntrinsics::_squareToLen: 799 if (!UseSquareToLenIntrinsic) return true; 800 break; 801 case vmIntrinsics::_mulAdd: 802 if (!UseMulAddIntrinsic) return true; 803 break; 804 case vmIntrinsics::_montgomeryMultiply: 805 if (!UseMontgomeryMultiplyIntrinsic) return true; 806 break; 807 case vmIntrinsics::_montgomerySquare: 808 if (!UseMontgomerySquareIntrinsic) return true; 809 break; 810 case vmIntrinsics::_addExactI: 811 case vmIntrinsics::_addExactL: 812 case vmIntrinsics::_decrementExactI: 813 case vmIntrinsics::_decrementExactL: 814 case vmIntrinsics::_incrementExactI: 815 case vmIntrinsics::_incrementExactL: 816 case vmIntrinsics::_multiplyExactI: 817 case vmIntrinsics::_multiplyExactL: 818 case vmIntrinsics::_negateExactI: 819 case vmIntrinsics::_negateExactL: 820 case vmIntrinsics::_subtractExactI: 821 case vmIntrinsics::_subtractExactL: 822 if (!UseMathExactIntrinsics || !InlineMathNatives) return true; 823 break; 824 #endif // COMPILER2 825 default: 826 return false; 827 } 828 829 return false; 830 } 831 832 #define VM_INTRINSIC_INITIALIZE(id, klass, name, sig, flags) #id "\0" 833 static const char* vm_intrinsic_name_bodies = 834 VM_INTRINSICS_DO(VM_INTRINSIC_INITIALIZE, 835 VM_SYMBOL_IGNORE, VM_SYMBOL_IGNORE, VM_SYMBOL_IGNORE, VM_ALIAS_IGNORE); 836 837 static const char* vm_intrinsic_name_table[vmIntrinsics::ID_LIMIT]; 838 839 const char* vmIntrinsics::name_at(vmIntrinsics::ID id) { 840 const char** nt = &vm_intrinsic_name_table[0]; 841 if (nt[_none] == NULL) { 842 char* string = (char*) &vm_intrinsic_name_bodies[0]; 843 for (int index = FIRST_ID; index < ID_LIMIT; index++) { 844 nt[index] = string; 845 string += strlen(string); // skip string body 846 string += 1; // skip trailing null 847 } 848 assert(!strcmp(nt[_hashCode], "_hashCode"), "lined up"); 849 nt[_none] = "_none"; 850 } 851 if ((uint)id < (uint)ID_LIMIT) 852 return vm_intrinsic_name_table[(uint)id]; 853 else 854 return "(unknown intrinsic)"; 855 } 856 857 // These are flag-matching functions: 858 inline bool match_F_R(jshort flags) { 859 const int req = 0; 860 const int neg = JVM_ACC_STATIC | JVM_ACC_SYNCHRONIZED; 861 return (flags & (req | neg)) == req; 862 } 863 inline bool match_F_Y(jshort flags) { 864 const int req = JVM_ACC_SYNCHRONIZED; 865 const int neg = JVM_ACC_STATIC; 866 return (flags & (req | neg)) == req; 867 } 868 inline bool match_F_RN(jshort flags) { 869 const int req = JVM_ACC_NATIVE; 870 const int neg = JVM_ACC_STATIC | JVM_ACC_SYNCHRONIZED; 871 return (flags & (req | neg)) == req; 872 } 873 inline bool match_F_S(jshort flags) { 874 const int req = JVM_ACC_STATIC; 875 const int neg = JVM_ACC_SYNCHRONIZED; 876 return (flags & (req | neg)) == req; 877 } 878 inline bool match_F_SN(jshort flags) { 879 const int req = JVM_ACC_STATIC | JVM_ACC_NATIVE; 880 const int neg = JVM_ACC_SYNCHRONIZED; 881 return (flags & (req | neg)) == req; 882 } 883 inline bool match_F_RNY(jshort flags) { 884 const int req = JVM_ACC_NATIVE | JVM_ACC_SYNCHRONIZED; 885 const int neg = JVM_ACC_STATIC; 886 return (flags & (req | neg)) == req; 887 } 888 889 // These are for forming case labels: 890 #define ID3(x, y, z) (( jlong)(z) + \ 891 ((jlong)(y) << vmSymbols::log2_SID_LIMIT) + \ 892 ((jlong)(x) << (2*vmSymbols::log2_SID_LIMIT)) ) 893 #define SID_ENUM(n) vmSymbols::VM_SYMBOL_ENUM_NAME(n) 894 895 vmIntrinsics::ID vmIntrinsics::find_id_impl(vmSymbols::SID holder, 896 vmSymbols::SID name, 897 vmSymbols::SID sig, 898 jshort flags) { 899 assert((int)vmSymbols::SID_LIMIT <= (1<<vmSymbols::log2_SID_LIMIT), "must fit"); 900 901 // Let the C compiler build the decision tree. 902 903 #define VM_INTRINSIC_CASE(id, klass, name, sig, fcode) \ 904 case ID3(SID_ENUM(klass), SID_ENUM(name), SID_ENUM(sig)): \ 905 if (!match_##fcode(flags)) break; \ 906 return id; 907 908 switch (ID3(holder, name, sig)) { 909 VM_INTRINSICS_DO(VM_INTRINSIC_CASE, 910 VM_SYMBOL_IGNORE, VM_SYMBOL_IGNORE, VM_SYMBOL_IGNORE, VM_ALIAS_IGNORE); 911 } 912 return vmIntrinsics::_none; 913 914 #undef VM_INTRINSIC_CASE 915 } 916 917 918 const char* vmIntrinsics::short_name_as_C_string(vmIntrinsics::ID id, char* buf, int buflen) { 919 const char* str = name_at(id); 920 #ifndef PRODUCT 921 const char* kname = vmSymbols::name_for(class_for(id)); 922 const char* mname = vmSymbols::name_for(name_for(id)); 923 const char* sname = vmSymbols::name_for(signature_for(id)); 924 const char* fname = ""; 925 switch (flags_for(id)) { 926 case F_Y: fname = "synchronized "; break; 927 case F_RN: fname = "native "; break; 928 case F_SN: fname = "native static "; break; 929 case F_S: fname = "static "; break; 930 case F_RNY:fname = "native synchronized "; break; 931 default: break; 932 } 933 const char* kptr = strrchr(kname, '/'); 934 if (kptr != NULL) kname = kptr + 1; 935 int len = jio_snprintf(buf, buflen, "%s: %s%s.%s%s", 936 str, fname, kname, mname, sname); 937 if (len < buflen) 938 str = buf; 939 #endif //PRODUCT 940 return str; 941 } 942 943 944 // These are to get information about intrinsics. 945 946 #define ID4(x, y, z, f) ((ID3(x, y, z) << vmIntrinsics::log2_FLAG_LIMIT) | (jlong) (f)) 947 948 static const jlong intrinsic_info_array[vmIntrinsics::ID_LIMIT+1] = { 949 #define VM_INTRINSIC_INFO(ignore_id, klass, name, sig, fcode) \ 950 ID4(SID_ENUM(klass), SID_ENUM(name), SID_ENUM(sig), vmIntrinsics::fcode), 951 952 0, VM_INTRINSICS_DO(VM_INTRINSIC_INFO, 953 VM_SYMBOL_IGNORE, VM_SYMBOL_IGNORE, VM_SYMBOL_IGNORE, VM_ALIAS_IGNORE) 954 0 955 #undef VM_INTRINSIC_INFO 956 }; 957 958 inline jlong intrinsic_info(vmIntrinsics::ID id) { 959 return intrinsic_info_array[vmIntrinsics::ID_from((int)id)]; 960 } 961 962 vmSymbols::SID vmIntrinsics::class_for(vmIntrinsics::ID id) { 963 jlong info = intrinsic_info(id); 964 int shift = 2*vmSymbols::log2_SID_LIMIT + log2_FLAG_LIMIT, mask = right_n_bits(vmSymbols::log2_SID_LIMIT); 965 assert(((ID4(1021,1022,1023,15) >> shift) & mask) == 1021, ""); 966 return vmSymbols::SID( (info >> shift) & mask ); 967 } 968 969 vmSymbols::SID vmIntrinsics::name_for(vmIntrinsics::ID id) { 970 jlong info = intrinsic_info(id); 971 int shift = vmSymbols::log2_SID_LIMIT + log2_FLAG_LIMIT, mask = right_n_bits(vmSymbols::log2_SID_LIMIT); 972 assert(((ID4(1021,1022,1023,15) >> shift) & mask) == 1022, ""); 973 return vmSymbols::SID( (info >> shift) & mask ); 974 } 975 976 vmSymbols::SID vmIntrinsics::signature_for(vmIntrinsics::ID id) { 977 jlong info = intrinsic_info(id); 978 int shift = log2_FLAG_LIMIT, mask = right_n_bits(vmSymbols::log2_SID_LIMIT); 979 assert(((ID4(1021,1022,1023,15) >> shift) & mask) == 1023, ""); 980 return vmSymbols::SID( (info >> shift) & mask ); 981 } 982 983 vmIntrinsics::Flags vmIntrinsics::flags_for(vmIntrinsics::ID id) { 984 jlong info = intrinsic_info(id); 985 int shift = 0, mask = right_n_bits(log2_FLAG_LIMIT); 986 assert(((ID4(1021,1022,1023,15) >> shift) & mask) == 15, ""); 987 return Flags( (info >> shift) & mask ); 988 } 989 990 991 #ifndef PRODUCT 992 // verify_method performs an extra check on a matched intrinsic method 993 994 static bool match_method(Method* m, Symbol* n, Symbol* s) { 995 return (m->name() == n && 996 m->signature() == s); 997 } 998 999 static vmIntrinsics::ID match_method_with_klass(Method* m, Symbol* mk) { 1000 #define VM_INTRINSIC_MATCH(id, klassname, namepart, sigpart, flags) \ 1001 { Symbol* k = vmSymbols::klassname(); \ 1002 if (mk == k) { \ 1003 Symbol* n = vmSymbols::namepart(); \ 1004 Symbol* s = vmSymbols::sigpart(); \ 1005 if (match_method(m, n, s)) \ 1006 return vmIntrinsics::id; \ 1007 } } 1008 VM_INTRINSICS_DO(VM_INTRINSIC_MATCH, 1009 VM_SYMBOL_IGNORE, VM_SYMBOL_IGNORE, VM_SYMBOL_IGNORE, VM_ALIAS_IGNORE); 1010 return vmIntrinsics::_none; 1011 #undef VM_INTRINSIC_MATCH 1012 } 1013 1014 void vmIntrinsics::verify_method(ID actual_id, Method* m) { 1015 Symbol* mk = m->method_holder()->name(); 1016 ID declared_id = match_method_with_klass(m, mk); 1017 1018 if (declared_id == actual_id) return; // success 1019 1020 if (declared_id == _none && actual_id != _none && mk == vmSymbols::java_lang_StrictMath()) { 1021 // Here are a few special cases in StrictMath not declared in vmSymbols.hpp. 1022 switch (actual_id) { 1023 case _min: 1024 case _max: 1025 case _dsqrt: 1026 declared_id = match_method_with_klass(m, vmSymbols::java_lang_Math()); 1027 if (declared_id == actual_id) return; // acceptable alias 1028 break; 1029 default: 1030 break; 1031 } 1032 } 1033 1034 const char* declared_name = name_at(declared_id); 1035 const char* actual_name = name_at(actual_id); 1036 methodHandle mh = m; 1037 m = NULL; 1038 ttyLocker ttyl; 1039 if (xtty != NULL) { 1040 xtty->begin_elem("intrinsic_misdeclared actual='%s' declared='%s'", 1041 actual_name, declared_name); 1042 xtty->method(mh); 1043 xtty->end_elem("%s", ""); 1044 } 1045 if (PrintMiscellaneous && (WizardMode || Verbose)) { 1046 tty->print_cr("*** misidentified method; %s(%d) should be %s(%d):", 1047 declared_name, declared_id, actual_name, actual_id); 1048 mh()->print_short_name(tty); 1049 tty->cr(); 1050 } 1051 } 1052 #endif //PRODUCT