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, methodHandle compilation_context) { 421 vmIntrinsics::ID id = method->intrinsic_id(); 422 assert(id != vmIntrinsics::_none, "must be a VM intrinsic"); 423 424 // Check if the intrinsic corresponding to 'method' has been disabled on 425 // the command line by using the DisableIntrinsic flag (either globally 426 // or on a per-method level, see src/share/vm/compiler/abstractCompiler.hpp 427 // for details). 428 // Usually, the compilation context is the caller of the method 'method'. 429 // The only case when for a non-recursive method 'method' the compilation context 430 // is not the caller of the 'method' (but it is the method itself) is 431 // java.lang.ref.Referene::get. 432 // For java.lang.ref.Reference::get, the intrinsic version is used 433 // instead of the compiled version so that the value in the referent 434 // field can be registered by the G1 pre-barrier code. The intrinsified 435 // version of Reference::get also adds a memory barrier to prevent 436 // commoning reads from the referent field across safepoint since GC 437 // can change the referent field's value. See Compile::Compile() 438 // in src/share/vm/opto/compile.cpp or 439 // GraphBuilder::GraphBuilder() in src/share/vm/c1/c1_GraphBuilder.cpp 440 // for more details. 441 ccstr disable_intr = NULL; 442 if ((DisableIntrinsic[0] != '\0' && strstr(DisableIntrinsic, vmIntrinsics::name_at(id)) != NULL) || 443 (!compilation_context.is_null() && 444 CompilerOracle::has_option_value(compilation_context, "DisableIntrinsic", disable_intr) && 445 strstr(disable_intr, vmIntrinsics::name_at(id)) != NULL) 446 ) { 447 return true; 448 } 449 450 // -XX:-InlineNatives disables nearly all intrinsics except the ones listed in 451 // the following switch statement. 452 if (!InlineNatives) { 453 switch (id) { 454 case vmIntrinsics::_indexOfL: 455 case vmIntrinsics::_indexOfU: 456 case vmIntrinsics::_indexOfUL: 457 case vmIntrinsics::_indexOfIL: 458 case vmIntrinsics::_indexOfIU: 459 case vmIntrinsics::_indexOfIUL: 460 case vmIntrinsics::_indexOfU_char: 461 case vmIntrinsics::_compareToL: 462 case vmIntrinsics::_compareToU: 463 case vmIntrinsics::_compareToLU: 464 case vmIntrinsics::_compareToUL: 465 case vmIntrinsics::_equalsL: 466 case vmIntrinsics::_equalsU: 467 case vmIntrinsics::_equalsC: 468 case vmIntrinsics::_getCharStringU: 469 case vmIntrinsics::_putCharStringU: 470 case vmIntrinsics::_compressStringC: 471 case vmIntrinsics::_compressStringB: 472 case vmIntrinsics::_inflateStringC: 473 case vmIntrinsics::_inflateStringB: 474 case vmIntrinsics::_getAndAddInt: 475 case vmIntrinsics::_getAndAddLong: 476 case vmIntrinsics::_getAndSetInt: 477 case vmIntrinsics::_getAndSetLong: 478 case vmIntrinsics::_getAndSetObject: 479 case vmIntrinsics::_loadFence: 480 case vmIntrinsics::_storeFence: 481 case vmIntrinsics::_fullFence: 482 case vmIntrinsics::_hasNegatives: 483 case vmIntrinsics::_Reference_get: 484 break; 485 default: 486 return true; 487 } 488 } 489 490 switch (id) { 491 case vmIntrinsics::_isInstance: 492 case vmIntrinsics::_isAssignableFrom: 493 case vmIntrinsics::_getModifiers: 494 case vmIntrinsics::_isInterface: 495 case vmIntrinsics::_isArray: 496 case vmIntrinsics::_isPrimitive: 497 case vmIntrinsics::_getSuperclass: 498 case vmIntrinsics::_Class_cast: 499 case vmIntrinsics::_getLength: 500 case vmIntrinsics::_newArray: 501 case vmIntrinsics::_getClass: 502 if (!InlineClassNatives) return true; 503 break; 504 case vmIntrinsics::_currentThread: 505 case vmIntrinsics::_isInterrupted: 506 if (!InlineThreadNatives) return true; 507 break; 508 case vmIntrinsics::_floatToRawIntBits: 509 case vmIntrinsics::_intBitsToFloat: 510 case vmIntrinsics::_doubleToRawLongBits: 511 case vmIntrinsics::_longBitsToDouble: 512 case vmIntrinsics::_dabs: 513 case vmIntrinsics::_dsqrt: 514 case vmIntrinsics::_dsin: 515 case vmIntrinsics::_dcos: 516 case vmIntrinsics::_dtan: 517 case vmIntrinsics::_dlog: 518 case vmIntrinsics::_dexp: 519 case vmIntrinsics::_dpow: 520 case vmIntrinsics::_dlog10: 521 case vmIntrinsics::_datan2: 522 case vmIntrinsics::_min: 523 case vmIntrinsics::_max: 524 case vmIntrinsics::_floatToIntBits: 525 case vmIntrinsics::_doubleToLongBits: 526 if (!InlineMathNatives) return true; 527 break; 528 case vmIntrinsics::_arraycopy: 529 if (!InlineArrayCopy) return true; 530 break; 531 case vmIntrinsics::_updateCRC32: 532 case vmIntrinsics::_updateBytesCRC32: 533 case vmIntrinsics::_updateByteBufferCRC32: 534 if (!UseCRC32Intrinsics) return true; 535 break; 536 case vmIntrinsics::_getObject: 537 case vmIntrinsics::_getBoolean: 538 case vmIntrinsics::_getByte: 539 case vmIntrinsics::_getShort: 540 case vmIntrinsics::_getChar: 541 case vmIntrinsics::_getInt: 542 case vmIntrinsics::_getLong: 543 case vmIntrinsics::_getFloat: 544 case vmIntrinsics::_getDouble: 545 case vmIntrinsics::_putObject: 546 case vmIntrinsics::_putBoolean: 547 case vmIntrinsics::_putByte: 548 case vmIntrinsics::_putShort: 549 case vmIntrinsics::_putChar: 550 case vmIntrinsics::_putInt: 551 case vmIntrinsics::_putLong: 552 case vmIntrinsics::_putFloat: 553 case vmIntrinsics::_putDouble: 554 case vmIntrinsics::_getObjectVolatile: 555 case vmIntrinsics::_getBooleanVolatile: 556 case vmIntrinsics::_getByteVolatile: 557 case vmIntrinsics::_getShortVolatile: 558 case vmIntrinsics::_getCharVolatile: 559 case vmIntrinsics::_getIntVolatile: 560 case vmIntrinsics::_getLongVolatile: 561 case vmIntrinsics::_getFloatVolatile: 562 case vmIntrinsics::_getDoubleVolatile: 563 case vmIntrinsics::_putObjectVolatile: 564 case vmIntrinsics::_putBooleanVolatile: 565 case vmIntrinsics::_putByteVolatile: 566 case vmIntrinsics::_putShortVolatile: 567 case vmIntrinsics::_putCharVolatile: 568 case vmIntrinsics::_putIntVolatile: 569 case vmIntrinsics::_putLongVolatile: 570 case vmIntrinsics::_putFloatVolatile: 571 case vmIntrinsics::_putDoubleVolatile: 572 case vmIntrinsics::_getByte_raw: 573 case vmIntrinsics::_getShort_raw: 574 case vmIntrinsics::_getChar_raw: 575 case vmIntrinsics::_getInt_raw: 576 case vmIntrinsics::_getLong_raw: 577 case vmIntrinsics::_getFloat_raw: 578 case vmIntrinsics::_getDouble_raw: 579 case vmIntrinsics::_putByte_raw: 580 case vmIntrinsics::_putShort_raw: 581 case vmIntrinsics::_putChar_raw: 582 case vmIntrinsics::_putInt_raw: 583 case vmIntrinsics::_putLong_raw: 584 case vmIntrinsics::_putFloat_raw: 585 case vmIntrinsics::_putDouble_raw: 586 case vmIntrinsics::_putOrderedObject: 587 case vmIntrinsics::_putOrderedLong: 588 case vmIntrinsics::_putOrderedInt: 589 case vmIntrinsics::_getAndAddInt: 590 case vmIntrinsics::_getAndAddLong: 591 case vmIntrinsics::_getAndSetInt: 592 case vmIntrinsics::_getAndSetLong: 593 case vmIntrinsics::_getAndSetObject: 594 case vmIntrinsics::_loadFence: 595 case vmIntrinsics::_storeFence: 596 case vmIntrinsics::_fullFence: 597 case vmIntrinsics::_compareAndSwapObject: 598 case vmIntrinsics::_compareAndSwapLong: 599 case vmIntrinsics::_compareAndSwapInt: 600 if (!InlineUnsafeOps) return true; 601 break; 602 case vmIntrinsics::_getShortUnaligned: 603 case vmIntrinsics::_getCharUnaligned: 604 case vmIntrinsics::_getIntUnaligned: 605 case vmIntrinsics::_getLongUnaligned: 606 case vmIntrinsics::_putShortUnaligned: 607 case vmIntrinsics::_putCharUnaligned: 608 case vmIntrinsics::_putIntUnaligned: 609 case vmIntrinsics::_putLongUnaligned: 610 case vmIntrinsics::_allocateInstance: 611 case vmIntrinsics::_getAddress_raw: 612 case vmIntrinsics::_putAddress_raw: 613 if (!InlineUnsafeOps || !UseUnalignedAccesses) return true; 614 break; 615 case vmIntrinsics::_hashCode: 616 if (!InlineObjectHash) return true; 617 break; 618 case vmIntrinsics::_aescrypt_encryptBlock: 619 case vmIntrinsics::_aescrypt_decryptBlock: 620 if (!UseAESIntrinsics) return true; 621 break; 622 case vmIntrinsics::_cipherBlockChaining_encryptAESCrypt: 623 case vmIntrinsics::_cipherBlockChaining_decryptAESCrypt: 624 if (!UseAESIntrinsics) return true; 625 break; 626 case vmIntrinsics::_sha_implCompress: 627 if (!UseSHA1Intrinsics) return true; 628 break; 629 case vmIntrinsics::_sha2_implCompress: 630 if (!UseSHA256Intrinsics) return true; 631 break; 632 case vmIntrinsics::_sha5_implCompress: 633 if (!UseSHA512Intrinsics) return true; 634 break; 635 case vmIntrinsics::_digestBase_implCompressMB: 636 if (!(UseSHA1Intrinsics || UseSHA256Intrinsics || UseSHA512Intrinsics)) return true; 637 break; 638 case vmIntrinsics::_ghash_processBlocks: 639 if (!UseGHASHIntrinsics) return true; 640 break; 641 case vmIntrinsics::_updateBytesCRC32C: 642 case vmIntrinsics::_updateDirectByteBufferCRC32C: 643 if (!UseCRC32CIntrinsics) return true; 644 break; 645 case vmIntrinsics::_updateBytesAdler32: 646 case vmIntrinsics::_updateByteBufferAdler32: 647 if (!UseAdler32Intrinsics) return true; 648 break; 649 case vmIntrinsics::_copyMemory: 650 if (!InlineArrayCopy || !InlineUnsafeOps) return true; 651 break; 652 #ifdef COMPILER1 653 case vmIntrinsics::_checkIndex: 654 if (!InlineNIOCheckIndex) return true; 655 break; 656 #endif // COMPILER1 657 #ifdef COMPILER2 658 case vmIntrinsics::_clone: 659 case vmIntrinsics::_copyOf: 660 case vmIntrinsics::_copyOfRange: 661 // These intrinsics use both the objectcopy and the arraycopy 662 // intrinsic mechanism. 663 if (!InlineObjectCopy || !InlineArrayCopy) return true; 664 break; 665 case vmIntrinsics::_compareToL: 666 case vmIntrinsics::_compareToU: 667 case vmIntrinsics::_compareToLU: 668 case vmIntrinsics::_compareToUL: 669 if (!SpecialStringCompareTo) return true; 670 break; 671 case vmIntrinsics::_indexOfL: 672 case vmIntrinsics::_indexOfU: 673 case vmIntrinsics::_indexOfUL: 674 case vmIntrinsics::_indexOfIL: 675 case vmIntrinsics::_indexOfIU: 676 case vmIntrinsics::_indexOfIUL: 677 case vmIntrinsics::_indexOfU_char: 678 if (!SpecialStringIndexOf) return true; 679 break; 680 case vmIntrinsics::_equalsL: 681 case vmIntrinsics::_equalsU: 682 if (!SpecialStringEquals) return true; 683 break; 684 case vmIntrinsics::_equalsB: 685 case vmIntrinsics::_equalsC: 686 if (!SpecialArraysEquals) return true; 687 break; 688 case vmIntrinsics::_encodeISOArray: 689 case vmIntrinsics::_encodeByteISOArray: 690 if (!SpecialEncodeISOArray) return true; 691 break; 692 case vmIntrinsics::_getCallerClass: 693 if (!InlineReflectionGetCallerClass) return true; 694 break; 695 case vmIntrinsics::_multiplyToLen: 696 if (!UseMultiplyToLenIntrinsic) return true; 697 break; 698 case vmIntrinsics::_squareToLen: 699 if (!UseSquareToLenIntrinsic) return true; 700 break; 701 case vmIntrinsics::_mulAdd: 702 if (!UseMulAddIntrinsic) return true; 703 break; 704 case vmIntrinsics::_montgomeryMultiply: 705 if (!UseMontgomeryMultiplyIntrinsic) return true; 706 break; 707 case vmIntrinsics::_montgomerySquare: 708 if (!UseMontgomerySquareIntrinsic) return true; 709 break; 710 case vmIntrinsics::_addExactI: 711 case vmIntrinsics::_addExactL: 712 case vmIntrinsics::_decrementExactI: 713 case vmIntrinsics::_decrementExactL: 714 case vmIntrinsics::_incrementExactI: 715 case vmIntrinsics::_incrementExactL: 716 case vmIntrinsics::_multiplyExactI: 717 case vmIntrinsics::_multiplyExactL: 718 case vmIntrinsics::_negateExactI: 719 case vmIntrinsics::_negateExactL: 720 case vmIntrinsics::_subtractExactI: 721 case vmIntrinsics::_subtractExactL: 722 if (!UseMathExactIntrinsics || !InlineMathNatives) return true; 723 break; 724 case vmIntrinsics::_getCharStringU: 725 case vmIntrinsics::_putCharStringU: 726 // Until JDK-8138651 is fixed, we have to rely on a special flag to 727 // disable these intrinsics for experiments. 728 if (!StringCharIntrinsics) return true; 729 break; 730 #endif // COMPILER2 731 default: 732 return false; 733 } 734 735 return false; 736 } 737 738 #define VM_INTRINSIC_INITIALIZE(id, klass, name, sig, flags) #id "\0" 739 static const char* vm_intrinsic_name_bodies = 740 VM_INTRINSICS_DO(VM_INTRINSIC_INITIALIZE, 741 VM_SYMBOL_IGNORE, VM_SYMBOL_IGNORE, VM_SYMBOL_IGNORE, VM_ALIAS_IGNORE); 742 743 static const char* vm_intrinsic_name_table[vmIntrinsics::ID_LIMIT]; 744 745 const char* vmIntrinsics::name_at(vmIntrinsics::ID id) { 746 const char** nt = &vm_intrinsic_name_table[0]; 747 if (nt[_none] == NULL) { 748 char* string = (char*) &vm_intrinsic_name_bodies[0]; 749 for (int index = FIRST_ID; index < ID_LIMIT; index++) { 750 nt[index] = string; 751 string += strlen(string); // skip string body 752 string += 1; // skip trailing null 753 } 754 assert(!strcmp(nt[_hashCode], "_hashCode"), "lined up"); 755 nt[_none] = "_none"; 756 } 757 if ((uint)id < (uint)ID_LIMIT) 758 return vm_intrinsic_name_table[(uint)id]; 759 else 760 return "(unknown intrinsic)"; 761 } 762 763 // These are flag-matching functions: 764 inline bool match_F_R(jshort flags) { 765 const int req = 0; 766 const int neg = JVM_ACC_STATIC | JVM_ACC_SYNCHRONIZED; 767 return (flags & (req | neg)) == req; 768 } 769 inline bool match_F_Y(jshort flags) { 770 const int req = JVM_ACC_SYNCHRONIZED; 771 const int neg = JVM_ACC_STATIC; 772 return (flags & (req | neg)) == req; 773 } 774 inline bool match_F_RN(jshort flags) { 775 const int req = JVM_ACC_NATIVE; 776 const int neg = JVM_ACC_STATIC | JVM_ACC_SYNCHRONIZED; 777 return (flags & (req | neg)) == req; 778 } 779 inline bool match_F_S(jshort flags) { 780 const int req = JVM_ACC_STATIC; 781 const int neg = JVM_ACC_SYNCHRONIZED; 782 return (flags & (req | neg)) == req; 783 } 784 inline bool match_F_SN(jshort flags) { 785 const int req = JVM_ACC_STATIC | JVM_ACC_NATIVE; 786 const int neg = JVM_ACC_SYNCHRONIZED; 787 return (flags & (req | neg)) == req; 788 } 789 inline bool match_F_RNY(jshort flags) { 790 const int req = JVM_ACC_NATIVE | JVM_ACC_SYNCHRONIZED; 791 const int neg = JVM_ACC_STATIC; 792 return (flags & (req | neg)) == req; 793 } 794 795 // These are for forming case labels: 796 #define ID3(x, y, z) (( jlong)(z) + \ 797 ((jlong)(y) << vmSymbols::log2_SID_LIMIT) + \ 798 ((jlong)(x) << (2*vmSymbols::log2_SID_LIMIT)) ) 799 #define SID_ENUM(n) vmSymbols::VM_SYMBOL_ENUM_NAME(n) 800 801 vmIntrinsics::ID vmIntrinsics::find_id_impl(vmSymbols::SID holder, 802 vmSymbols::SID name, 803 vmSymbols::SID sig, 804 jshort flags) { 805 assert((int)vmSymbols::SID_LIMIT <= (1<<vmSymbols::log2_SID_LIMIT), "must fit"); 806 807 // Let the C compiler build the decision tree. 808 809 #define VM_INTRINSIC_CASE(id, klass, name, sig, fcode) \ 810 case ID3(SID_ENUM(klass), SID_ENUM(name), SID_ENUM(sig)): \ 811 if (!match_##fcode(flags)) break; \ 812 return id; 813 814 switch (ID3(holder, name, sig)) { 815 VM_INTRINSICS_DO(VM_INTRINSIC_CASE, 816 VM_SYMBOL_IGNORE, VM_SYMBOL_IGNORE, VM_SYMBOL_IGNORE, VM_ALIAS_IGNORE); 817 } 818 return vmIntrinsics::_none; 819 820 #undef VM_INTRINSIC_CASE 821 } 822 823 824 const char* vmIntrinsics::short_name_as_C_string(vmIntrinsics::ID id, char* buf, int buflen) { 825 const char* str = name_at(id); 826 #ifndef PRODUCT 827 const char* kname = vmSymbols::name_for(class_for(id)); 828 const char* mname = vmSymbols::name_for(name_for(id)); 829 const char* sname = vmSymbols::name_for(signature_for(id)); 830 const char* fname = ""; 831 switch (flags_for(id)) { 832 case F_Y: fname = "synchronized "; break; 833 case F_RN: fname = "native "; break; 834 case F_SN: fname = "native static "; break; 835 case F_S: fname = "static "; break; 836 case F_RNY:fname = "native synchronized "; break; 837 } 838 const char* kptr = strrchr(kname, '/'); 839 if (kptr != NULL) kname = kptr + 1; 840 int len = jio_snprintf(buf, buflen, "%s: %s%s.%s%s", 841 str, fname, kname, mname, sname); 842 if (len < buflen) 843 str = buf; 844 #endif //PRODUCT 845 return str; 846 } 847 848 849 // These are to get information about intrinsics. 850 851 #define ID4(x, y, z, f) ((ID3(x, y, z) << vmIntrinsics::log2_FLAG_LIMIT) | (jlong) (f)) 852 853 static const jlong intrinsic_info_array[vmIntrinsics::ID_LIMIT+1] = { 854 #define VM_INTRINSIC_INFO(ignore_id, klass, name, sig, fcode) \ 855 ID4(SID_ENUM(klass), SID_ENUM(name), SID_ENUM(sig), vmIntrinsics::fcode), 856 857 0, VM_INTRINSICS_DO(VM_INTRINSIC_INFO, 858 VM_SYMBOL_IGNORE, VM_SYMBOL_IGNORE, VM_SYMBOL_IGNORE, VM_ALIAS_IGNORE) 859 0 860 #undef VM_INTRINSIC_INFO 861 }; 862 863 inline jlong intrinsic_info(vmIntrinsics::ID id) { 864 return intrinsic_info_array[vmIntrinsics::ID_from((int)id)]; 865 } 866 867 vmSymbols::SID vmIntrinsics::class_for(vmIntrinsics::ID id) { 868 jlong info = intrinsic_info(id); 869 int shift = 2*vmSymbols::log2_SID_LIMIT + log2_FLAG_LIMIT, mask = right_n_bits(vmSymbols::log2_SID_LIMIT); 870 assert(((ID4(1021,1022,1023,15) >> shift) & mask) == 1021, ""); 871 return vmSymbols::SID( (info >> shift) & mask ); 872 } 873 874 vmSymbols::SID vmIntrinsics::name_for(vmIntrinsics::ID id) { 875 jlong info = intrinsic_info(id); 876 int shift = vmSymbols::log2_SID_LIMIT + log2_FLAG_LIMIT, mask = right_n_bits(vmSymbols::log2_SID_LIMIT); 877 assert(((ID4(1021,1022,1023,15) >> shift) & mask) == 1022, ""); 878 return vmSymbols::SID( (info >> shift) & mask ); 879 } 880 881 vmSymbols::SID vmIntrinsics::signature_for(vmIntrinsics::ID id) { 882 jlong info = intrinsic_info(id); 883 int shift = log2_FLAG_LIMIT, mask = right_n_bits(vmSymbols::log2_SID_LIMIT); 884 assert(((ID4(1021,1022,1023,15) >> shift) & mask) == 1023, ""); 885 return vmSymbols::SID( (info >> shift) & mask ); 886 } 887 888 vmIntrinsics::Flags vmIntrinsics::flags_for(vmIntrinsics::ID id) { 889 jlong info = intrinsic_info(id); 890 int shift = 0, mask = right_n_bits(log2_FLAG_LIMIT); 891 assert(((ID4(1021,1022,1023,15) >> shift) & mask) == 15, ""); 892 return Flags( (info >> shift) & mask ); 893 } 894 895 896 #ifndef PRODUCT 897 // verify_method performs an extra check on a matched intrinsic method 898 899 static bool match_method(Method* m, Symbol* n, Symbol* s) { 900 return (m->name() == n && 901 m->signature() == s); 902 } 903 904 static vmIntrinsics::ID match_method_with_klass(Method* m, Symbol* mk) { 905 #define VM_INTRINSIC_MATCH(id, klassname, namepart, sigpart, flags) \ 906 { Symbol* k = vmSymbols::klassname(); \ 907 if (mk == k) { \ 908 Symbol* n = vmSymbols::namepart(); \ 909 Symbol* s = vmSymbols::sigpart(); \ 910 if (match_method(m, n, s)) \ 911 return vmIntrinsics::id; \ 912 } } 913 VM_INTRINSICS_DO(VM_INTRINSIC_MATCH, 914 VM_SYMBOL_IGNORE, VM_SYMBOL_IGNORE, VM_SYMBOL_IGNORE, VM_ALIAS_IGNORE); 915 return vmIntrinsics::_none; 916 #undef VM_INTRINSIC_MATCH 917 } 918 919 void vmIntrinsics::verify_method(ID actual_id, Method* m) { 920 Symbol* mk = m->method_holder()->name(); 921 ID declared_id = match_method_with_klass(m, mk); 922 923 if (declared_id == actual_id) return; // success 924 925 if (declared_id == _none && actual_id != _none && mk == vmSymbols::java_lang_StrictMath()) { 926 // Here are a few special cases in StrictMath not declared in vmSymbols.hpp. 927 switch (actual_id) { 928 case _min: 929 case _max: 930 case _dsqrt: 931 declared_id = match_method_with_klass(m, vmSymbols::java_lang_Math()); 932 if (declared_id == actual_id) return; // acceptable alias 933 break; 934 } 935 } 936 937 const char* declared_name = name_at(declared_id); 938 const char* actual_name = name_at(actual_id); 939 methodHandle mh = m; 940 m = NULL; 941 ttyLocker ttyl; 942 if (xtty != NULL) { 943 xtty->begin_elem("intrinsic_misdeclared actual='%s' declared='%s'", 944 actual_name, declared_name); 945 xtty->method(mh); 946 xtty->end_elem("%s", ""); 947 } 948 if (PrintMiscellaneous && (WizardMode || Verbose)) { 949 tty->print_cr("*** misidentified method; %s(%d) should be %s(%d):", 950 declared_name, declared_id, actual_name, actual_id); 951 mh()->print_short_name(tty); 952 tty->cr(); 953 } 954 } 955 #endif //PRODUCT