1 /* 2 * Copyright (c) 2020, 2023, 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/vmIntrinsics.hpp" 27 #include "classfile/vmSymbols.hpp" 28 #include "compiler/compilerDirectives.hpp" 29 #include "jvm_constants.h" 30 #include "jvm_io.h" 31 #include "runtime/vm_version.hpp" 32 #include "utilities/checkedCast.hpp" 33 #include "utilities/tribool.hpp" 34 #include "utilities/xmlstream.hpp" 35 36 // These are flag-matching functions: 37 inline bool match_F_R(jshort flags) { 38 const int req = 0; 39 const int neg = JVM_ACC_STATIC | JVM_ACC_SYNCHRONIZED | JVM_ACC_NATIVE; 40 return (flags & (req | neg)) == req; 41 } 42 43 inline bool match_F_Y(jshort flags) { 44 const int req = JVM_ACC_SYNCHRONIZED; 45 const int neg = JVM_ACC_STATIC | JVM_ACC_NATIVE; 46 return (flags & (req | neg)) == req; 47 } 48 49 inline bool match_F_RN(jshort flags) { 50 const int req = JVM_ACC_NATIVE; 51 const int neg = JVM_ACC_STATIC | JVM_ACC_SYNCHRONIZED; 52 return (flags & (req | neg)) == req; 53 } 54 55 inline bool match_F_S(jshort flags) { 56 const int req = JVM_ACC_STATIC; 57 const int neg = JVM_ACC_SYNCHRONIZED | JVM_ACC_NATIVE; 58 return (flags & (req | neg)) == req; 59 } 60 61 inline bool match_F_SN(jshort flags) { 62 const int req = JVM_ACC_STATIC | JVM_ACC_NATIVE; 63 const int neg = JVM_ACC_SYNCHRONIZED; 64 return (flags & (req | neg)) == req; 65 } 66 67 bool vmIntrinsics::preserves_state(vmIntrinsics::ID id) { 68 assert(id != vmIntrinsics::_none, "must be a VM intrinsic"); 69 switch(id) { 70 #ifdef JFR_HAVE_INTRINSICS 71 case vmIntrinsics::_counterTime: 72 #endif 73 case vmIntrinsics::_currentTimeMillis: 74 case vmIntrinsics::_nanoTime: 75 case vmIntrinsics::_floatToRawIntBits: 76 case vmIntrinsics::_intBitsToFloat: 77 case vmIntrinsics::_doubleToRawLongBits: 78 case vmIntrinsics::_longBitsToDouble: 79 case vmIntrinsics::_getClass: 80 case vmIntrinsics::_isInstance: 81 case vmIntrinsics::_currentCarrierThread: 82 case vmIntrinsics::_currentThread: 83 case vmIntrinsics::_scopedValueCache: 84 case vmIntrinsics::_dabs: 85 case vmIntrinsics::_fabs: 86 case vmIntrinsics::_iabs: 87 case vmIntrinsics::_labs: 88 case vmIntrinsics::_dsqrt: 89 case vmIntrinsics::_dsqrt_strict: 90 case vmIntrinsics::_dsin: 91 case vmIntrinsics::_dcos: 92 case vmIntrinsics::_dtan: 93 case vmIntrinsics::_dlog: 94 case vmIntrinsics::_dlog10: 95 case vmIntrinsics::_dexp: 96 case vmIntrinsics::_dpow: 97 case vmIntrinsics::_Preconditions_checkIndex: 98 case vmIntrinsics::_Preconditions_checkLongIndex: 99 case vmIntrinsics::_Reference_get: 100 case vmIntrinsics::_Continuation_doYield: 101 case vmIntrinsics::_updateCRC32: 102 case vmIntrinsics::_updateBytesCRC32: 103 case vmIntrinsics::_updateByteBufferCRC32: 104 case vmIntrinsics::_updateBytesAdler32: 105 case vmIntrinsics::_vectorizedMismatch: 106 case vmIntrinsics::_fmaD: 107 case vmIntrinsics::_fmaF: 108 case vmIntrinsics::_isDigit: 109 case vmIntrinsics::_isLowerCase: 110 case vmIntrinsics::_isUpperCase: 111 case vmIntrinsics::_isWhitespace: 112 return true; 113 default: 114 return false; 115 } 116 } 117 118 bool vmIntrinsics::can_trap(vmIntrinsics::ID id) { 119 assert(id != vmIntrinsics::_none, "must be a VM intrinsic"); 120 switch(id) { 121 #ifdef JFR_HAVE_INTRINSICS 122 case vmIntrinsics::_counterTime: 123 #endif 124 case vmIntrinsics::_currentTimeMillis: 125 case vmIntrinsics::_nanoTime: 126 case vmIntrinsics::_floatToRawIntBits: 127 case vmIntrinsics::_intBitsToFloat: 128 case vmIntrinsics::_doubleToRawLongBits: 129 case vmIntrinsics::_longBitsToDouble: 130 case vmIntrinsics::_currentCarrierThread: 131 case vmIntrinsics::_currentThread: 132 case vmIntrinsics::_setCurrentThread: 133 case vmIntrinsics::_scopedValueCache: 134 case vmIntrinsics::_setScopedValueCache: 135 case vmIntrinsics::_dabs: 136 case vmIntrinsics::_fabs: 137 case vmIntrinsics::_iabs: 138 case vmIntrinsics::_labs: 139 case vmIntrinsics::_dsqrt: 140 case vmIntrinsics::_dsqrt_strict: 141 case vmIntrinsics::_dsin: 142 case vmIntrinsics::_dcos: 143 case vmIntrinsics::_dtan: 144 case vmIntrinsics::_dlog: 145 case vmIntrinsics::_dlog10: 146 case vmIntrinsics::_dexp: 147 case vmIntrinsics::_dpow: 148 case vmIntrinsics::_updateCRC32: 149 case vmIntrinsics::_updateBytesCRC32: 150 case vmIntrinsics::_updateByteBufferCRC32: 151 case vmIntrinsics::_vectorizedMismatch: 152 case vmIntrinsics::_fmaD: 153 case vmIntrinsics::_fmaF: 154 return false; 155 default: 156 return true; 157 } 158 } 159 160 // Some intrinsics produce different results if they are not pinned 161 bool vmIntrinsics::should_be_pinned(vmIntrinsics::ID id) { 162 assert(id != vmIntrinsics::_none, "must be a VM intrinsic"); 163 switch(id) { 164 #ifdef JFR_HAVE_INTRINSICS 165 case vmIntrinsics::_counterTime: 166 #endif 167 case vmIntrinsics::_currentTimeMillis: 168 case vmIntrinsics::_nanoTime: 169 case vmIntrinsics::_blackhole: 170 return true; 171 default: 172 return false; 173 } 174 } 175 176 bool vmIntrinsics::does_virtual_dispatch(vmIntrinsics::ID id) { 177 assert(id != vmIntrinsics::_none, "must be a VM intrinsic"); 178 switch(id) { 179 case vmIntrinsics::_hashCode: 180 case vmIntrinsics::_clone: 181 return true; 182 break; 183 default: 184 return false; 185 } 186 } 187 188 int vmIntrinsics::predicates_needed(vmIntrinsics::ID id) { 189 assert(id != vmIntrinsics::_none, "must be a VM intrinsic"); 190 switch (id) { 191 case vmIntrinsics::_cipherBlockChaining_encryptAESCrypt: 192 case vmIntrinsics::_cipherBlockChaining_decryptAESCrypt: 193 case vmIntrinsics::_electronicCodeBook_encryptAESCrypt: 194 case vmIntrinsics::_electronicCodeBook_decryptAESCrypt: 195 case vmIntrinsics::_counterMode_AESCrypt: 196 case vmIntrinsics::_galoisCounterMode_AESCrypt: 197 return 1; 198 case vmIntrinsics::_digestBase_implCompressMB: 199 return 5; 200 default: 201 return 0; 202 } 203 } 204 205 bool vmIntrinsics::disabled_by_jvm_flags(vmIntrinsics::ID id) { 206 assert(id != vmIntrinsics::_none, "must be a VM intrinsic"); 207 208 // -XX:-InlineNatives disables nearly all intrinsics except the ones listed in 209 // the following switch statement. 210 if (!InlineNatives) { 211 switch (id) { 212 case vmIntrinsics::_indexOfL: 213 case vmIntrinsics::_indexOfU: 214 case vmIntrinsics::_indexOfUL: 215 case vmIntrinsics::_indexOfIL: 216 case vmIntrinsics::_indexOfIU: 217 case vmIntrinsics::_indexOfIUL: 218 case vmIntrinsics::_indexOfU_char: 219 case vmIntrinsics::_indexOfL_char: 220 case vmIntrinsics::_compareToL: 221 case vmIntrinsics::_compareToU: 222 case vmIntrinsics::_compareToLU: 223 case vmIntrinsics::_compareToUL: 224 case vmIntrinsics::_equalsL: 225 case vmIntrinsics::_equalsU: 226 case vmIntrinsics::_equalsC: 227 case vmIntrinsics::_vectorizedHashCode: 228 case vmIntrinsics::_getCharStringU: 229 case vmIntrinsics::_putCharStringU: 230 case vmIntrinsics::_compressStringC: 231 case vmIntrinsics::_compressStringB: 232 case vmIntrinsics::_inflateStringC: 233 case vmIntrinsics::_inflateStringB: 234 case vmIntrinsics::_getAndAddInt: 235 case vmIntrinsics::_getAndAddLong: 236 case vmIntrinsics::_getAndSetInt: 237 case vmIntrinsics::_getAndSetLong: 238 case vmIntrinsics::_getAndSetReference: 239 case vmIntrinsics::_loadFence: 240 case vmIntrinsics::_storeFence: 241 case vmIntrinsics::_fullFence: 242 case vmIntrinsics::_countPositives: 243 case vmIntrinsics::_Reference_get: 244 case vmIntrinsics::_Continuation_doYield: 245 case vmIntrinsics::_Continuation_enterSpecial: 246 break; 247 default: 248 return true; 249 } 250 } 251 252 switch (id) { 253 case vmIntrinsics::_isInstance: 254 case vmIntrinsics::_isAssignableFrom: 255 case vmIntrinsics::_getModifiers: 256 case vmIntrinsics::_isInterface: 257 case vmIntrinsics::_isArray: 258 case vmIntrinsics::_isPrimitive: 259 case vmIntrinsics::_isHidden: 260 case vmIntrinsics::_getSuperclass: 261 case vmIntrinsics::_Class_cast: 262 case vmIntrinsics::_getLength: 263 case vmIntrinsics::_newArray: 264 case vmIntrinsics::_getClass: 265 if (!InlineClassNatives) return true; 266 break; 267 case vmIntrinsics::_currentCarrierThread: 268 case vmIntrinsics::_currentThread: 269 if (!InlineThreadNatives) return true; 270 break; 271 case vmIntrinsics::_setCurrentThread: 272 case vmIntrinsics::_scopedValueCache: 273 case vmIntrinsics::_setScopedValueCache: 274 case vmIntrinsics::_floatToRawIntBits: 275 case vmIntrinsics::_intBitsToFloat: 276 case vmIntrinsics::_doubleToRawLongBits: 277 case vmIntrinsics::_longBitsToDouble: 278 case vmIntrinsics::_ceil: 279 case vmIntrinsics::_floor: 280 case vmIntrinsics::_rint: 281 case vmIntrinsics::_dabs: 282 case vmIntrinsics::_fabs: 283 case vmIntrinsics::_iabs: 284 case vmIntrinsics::_labs: 285 case vmIntrinsics::_dsqrt: 286 case vmIntrinsics::_dsqrt_strict: 287 case vmIntrinsics::_dsin: 288 case vmIntrinsics::_dcos: 289 case vmIntrinsics::_dtan: 290 case vmIntrinsics::_dlog: 291 case vmIntrinsics::_dexp: 292 case vmIntrinsics::_dpow: 293 case vmIntrinsics::_dlog10: 294 case vmIntrinsics::_datan2: 295 case vmIntrinsics::_floatToIntBits: 296 case vmIntrinsics::_doubleToLongBits: 297 case vmIntrinsics::_min: 298 case vmIntrinsics::_max: 299 case vmIntrinsics::_maxF: 300 case vmIntrinsics::_minF: 301 case vmIntrinsics::_maxD: 302 case vmIntrinsics::_minD: 303 case vmIntrinsics::_min_strict: 304 case vmIntrinsics::_max_strict: 305 case vmIntrinsics::_maxF_strict: 306 case vmIntrinsics::_minF_strict: 307 case vmIntrinsics::_maxD_strict: 308 case vmIntrinsics::_minD_strict: 309 if (!InlineMathNatives) return true; 310 break; 311 case vmIntrinsics::_fmaD: 312 case vmIntrinsics::_fmaF: 313 if (!InlineMathNatives || !UseFMA) return true; 314 break; 315 case vmIntrinsics::_floatToFloat16: 316 case vmIntrinsics::_float16ToFloat: 317 if (!InlineIntrinsics) return true; 318 break; 319 case vmIntrinsics::_arraycopy: 320 if (!InlineArrayCopy) return true; 321 break; 322 case vmIntrinsics::_updateCRC32: 323 case vmIntrinsics::_updateBytesCRC32: 324 case vmIntrinsics::_updateByteBufferCRC32: 325 if (!UseCRC32Intrinsics) return true; 326 break; 327 case vmIntrinsics::_getReference: 328 case vmIntrinsics::_getBoolean: 329 case vmIntrinsics::_getByte: 330 case vmIntrinsics::_getShort: 331 case vmIntrinsics::_getChar: 332 case vmIntrinsics::_getInt: 333 case vmIntrinsics::_getLong: 334 case vmIntrinsics::_getFloat: 335 case vmIntrinsics::_getDouble: 336 case vmIntrinsics::_putReference: 337 case vmIntrinsics::_putBoolean: 338 case vmIntrinsics::_putByte: 339 case vmIntrinsics::_putShort: 340 case vmIntrinsics::_putChar: 341 case vmIntrinsics::_putInt: 342 case vmIntrinsics::_putLong: 343 case vmIntrinsics::_putFloat: 344 case vmIntrinsics::_putDouble: 345 case vmIntrinsics::_getReferenceVolatile: 346 case vmIntrinsics::_getBooleanVolatile: 347 case vmIntrinsics::_getByteVolatile: 348 case vmIntrinsics::_getShortVolatile: 349 case vmIntrinsics::_getCharVolatile: 350 case vmIntrinsics::_getIntVolatile: 351 case vmIntrinsics::_getLongVolatile: 352 case vmIntrinsics::_getFloatVolatile: 353 case vmIntrinsics::_getDoubleVolatile: 354 case vmIntrinsics::_putReferenceVolatile: 355 case vmIntrinsics::_putBooleanVolatile: 356 case vmIntrinsics::_putByteVolatile: 357 case vmIntrinsics::_putShortVolatile: 358 case vmIntrinsics::_putCharVolatile: 359 case vmIntrinsics::_putIntVolatile: 360 case vmIntrinsics::_putLongVolatile: 361 case vmIntrinsics::_putFloatVolatile: 362 case vmIntrinsics::_putDoubleVolatile: 363 case vmIntrinsics::_getReferenceAcquire: 364 case vmIntrinsics::_getBooleanAcquire: 365 case vmIntrinsics::_getByteAcquire: 366 case vmIntrinsics::_getShortAcquire: 367 case vmIntrinsics::_getCharAcquire: 368 case vmIntrinsics::_getIntAcquire: 369 case vmIntrinsics::_getLongAcquire: 370 case vmIntrinsics::_getFloatAcquire: 371 case vmIntrinsics::_getDoubleAcquire: 372 case vmIntrinsics::_putReferenceRelease: 373 case vmIntrinsics::_putBooleanRelease: 374 case vmIntrinsics::_putByteRelease: 375 case vmIntrinsics::_putShortRelease: 376 case vmIntrinsics::_putCharRelease: 377 case vmIntrinsics::_putIntRelease: 378 case vmIntrinsics::_putLongRelease: 379 case vmIntrinsics::_putFloatRelease: 380 case vmIntrinsics::_putDoubleRelease: 381 case vmIntrinsics::_getReferenceOpaque: 382 case vmIntrinsics::_getBooleanOpaque: 383 case vmIntrinsics::_getByteOpaque: 384 case vmIntrinsics::_getShortOpaque: 385 case vmIntrinsics::_getCharOpaque: 386 case vmIntrinsics::_getIntOpaque: 387 case vmIntrinsics::_getLongOpaque: 388 case vmIntrinsics::_getFloatOpaque: 389 case vmIntrinsics::_getDoubleOpaque: 390 case vmIntrinsics::_putReferenceOpaque: 391 case vmIntrinsics::_putBooleanOpaque: 392 case vmIntrinsics::_putByteOpaque: 393 case vmIntrinsics::_putShortOpaque: 394 case vmIntrinsics::_putCharOpaque: 395 case vmIntrinsics::_putIntOpaque: 396 case vmIntrinsics::_putLongOpaque: 397 case vmIntrinsics::_putFloatOpaque: 398 case vmIntrinsics::_putDoubleOpaque: 399 case vmIntrinsics::_getAndAddInt: 400 case vmIntrinsics::_getAndAddLong: 401 case vmIntrinsics::_getAndSetInt: 402 case vmIntrinsics::_getAndSetLong: 403 case vmIntrinsics::_getAndSetReference: 404 case vmIntrinsics::_loadFence: 405 case vmIntrinsics::_storeFence: 406 case vmIntrinsics::_fullFence: 407 case vmIntrinsics::_compareAndSetLong: 408 case vmIntrinsics::_weakCompareAndSetLong: 409 case vmIntrinsics::_weakCompareAndSetLongPlain: 410 case vmIntrinsics::_weakCompareAndSetLongAcquire: 411 case vmIntrinsics::_weakCompareAndSetLongRelease: 412 case vmIntrinsics::_compareAndSetInt: 413 case vmIntrinsics::_weakCompareAndSetInt: 414 case vmIntrinsics::_weakCompareAndSetIntPlain: 415 case vmIntrinsics::_weakCompareAndSetIntAcquire: 416 case vmIntrinsics::_weakCompareAndSetIntRelease: 417 case vmIntrinsics::_compareAndSetReference: 418 case vmIntrinsics::_weakCompareAndSetReference: 419 case vmIntrinsics::_weakCompareAndSetReferencePlain: 420 case vmIntrinsics::_weakCompareAndSetReferenceAcquire: 421 case vmIntrinsics::_weakCompareAndSetReferenceRelease: 422 case vmIntrinsics::_compareAndExchangeInt: 423 case vmIntrinsics::_compareAndExchangeIntAcquire: 424 case vmIntrinsics::_compareAndExchangeIntRelease: 425 case vmIntrinsics::_compareAndExchangeLong: 426 case vmIntrinsics::_compareAndExchangeLongAcquire: 427 case vmIntrinsics::_compareAndExchangeLongRelease: 428 case vmIntrinsics::_compareAndExchangeReference: 429 case vmIntrinsics::_compareAndExchangeReferenceAcquire: 430 case vmIntrinsics::_compareAndExchangeReferenceRelease: 431 case vmIntrinsics::_allocateInstance: 432 if (!InlineUnsafeOps) return true; 433 break; 434 case vmIntrinsics::_getShortUnaligned: 435 case vmIntrinsics::_getCharUnaligned: 436 case vmIntrinsics::_getIntUnaligned: 437 case vmIntrinsics::_getLongUnaligned: 438 case vmIntrinsics::_putShortUnaligned: 439 case vmIntrinsics::_putCharUnaligned: 440 case vmIntrinsics::_putIntUnaligned: 441 case vmIntrinsics::_putLongUnaligned: 442 if (!InlineUnsafeOps || !UseUnalignedAccesses) return true; 443 break; 444 case vmIntrinsics::_hashCode: 445 if (!InlineObjectHash) return true; 446 break; 447 case vmIntrinsics::_aescrypt_encryptBlock: 448 case vmIntrinsics::_aescrypt_decryptBlock: 449 if (!UseAESIntrinsics) return true; 450 break; 451 case vmIntrinsics::_cipherBlockChaining_encryptAESCrypt: 452 case vmIntrinsics::_cipherBlockChaining_decryptAESCrypt: 453 if (!UseAESIntrinsics) return true; 454 break; 455 case vmIntrinsics::_electronicCodeBook_encryptAESCrypt: 456 case vmIntrinsics::_electronicCodeBook_decryptAESCrypt: 457 if (!UseAESIntrinsics) return true; 458 break; 459 case vmIntrinsics::_counterMode_AESCrypt: 460 if (!UseAESCTRIntrinsics) return true; 461 break; 462 case vmIntrinsics::_galoisCounterMode_AESCrypt: 463 if (!UseAESIntrinsics) return true; 464 break; 465 case vmIntrinsics::_md5_implCompress: 466 if (!UseMD5Intrinsics) return true; 467 break; 468 case vmIntrinsics::_sha_implCompress: 469 if (!UseSHA1Intrinsics) return true; 470 break; 471 case vmIntrinsics::_sha2_implCompress: 472 if (!UseSHA256Intrinsics) return true; 473 break; 474 case vmIntrinsics::_sha5_implCompress: 475 if (!UseSHA512Intrinsics) return true; 476 break; 477 case vmIntrinsics::_sha3_implCompress: 478 if (!UseSHA3Intrinsics) return true; 479 break; 480 case vmIntrinsics::_digestBase_implCompressMB: 481 if (!(UseMD5Intrinsics || UseSHA1Intrinsics || UseSHA256Intrinsics || UseSHA512Intrinsics || UseSHA3Intrinsics)) return true; 482 break; 483 case vmIntrinsics::_ghash_processBlocks: 484 if (!UseGHASHIntrinsics) return true; 485 break; 486 case vmIntrinsics::_chacha20Block: 487 if (!UseChaCha20Intrinsics) return true; 488 break; 489 case vmIntrinsics::_base64_encodeBlock: 490 case vmIntrinsics::_base64_decodeBlock: 491 if (!UseBASE64Intrinsics) return true; 492 break; 493 case vmIntrinsics::_poly1305_processBlocks: 494 if (!UsePoly1305Intrinsics) return true; 495 break; 496 case vmIntrinsics::_updateBytesCRC32C: 497 case vmIntrinsics::_updateDirectByteBufferCRC32C: 498 if (!UseCRC32CIntrinsics) return true; 499 break; 500 case vmIntrinsics::_vectorizedMismatch: 501 if (!UseVectorizedMismatchIntrinsic) return true; 502 break; 503 case vmIntrinsics::_updateBytesAdler32: 504 case vmIntrinsics::_updateByteBufferAdler32: 505 if (!UseAdler32Intrinsics) return true; 506 break; 507 case vmIntrinsics::_copyMemory: 508 if (!InlineArrayCopy || !InlineUnsafeOps) return true; 509 break; 510 #ifdef COMPILER2 511 case vmIntrinsics::_clone: 512 case vmIntrinsics::_copyOf: 513 case vmIntrinsics::_copyOfRange: 514 // These intrinsics use both the objectcopy and the arraycopy 515 // intrinsic mechanism. 516 if (!InlineObjectCopy || !InlineArrayCopy) return true; 517 break; 518 case vmIntrinsics::_compareToL: 519 case vmIntrinsics::_compareToU: 520 case vmIntrinsics::_compareToLU: 521 case vmIntrinsics::_compareToUL: 522 if (!SpecialStringCompareTo) return true; 523 break; 524 case vmIntrinsics::_indexOfL: 525 case vmIntrinsics::_indexOfU: 526 case vmIntrinsics::_indexOfUL: 527 case vmIntrinsics::_indexOfIL: 528 case vmIntrinsics::_indexOfIU: 529 case vmIntrinsics::_indexOfIUL: 530 case vmIntrinsics::_indexOfU_char: 531 case vmIntrinsics::_indexOfL_char: 532 if (!SpecialStringIndexOf) return true; 533 break; 534 case vmIntrinsics::_equalsL: 535 case vmIntrinsics::_equalsU: 536 if (!SpecialStringEquals) return true; 537 break; 538 case vmIntrinsics::_vectorizedHashCode: 539 if (!UseVectorizedHashCodeIntrinsic) return true; 540 break; 541 case vmIntrinsics::_equalsB: 542 case vmIntrinsics::_equalsC: 543 if (!SpecialArraysEquals) return true; 544 break; 545 case vmIntrinsics::_encodeISOArray: 546 case vmIntrinsics::_encodeAsciiArray: 547 case vmIntrinsics::_encodeByteISOArray: 548 if (!SpecialEncodeISOArray) return true; 549 break; 550 case vmIntrinsics::_getCallerClass: 551 if (!InlineReflectionGetCallerClass) return true; 552 break; 553 case vmIntrinsics::_multiplyToLen: 554 if (!UseMultiplyToLenIntrinsic) return true; 555 break; 556 case vmIntrinsics::_squareToLen: 557 if (!UseSquareToLenIntrinsic) return true; 558 break; 559 case vmIntrinsics::_mulAdd: 560 if (!UseMulAddIntrinsic) return true; 561 break; 562 case vmIntrinsics::_montgomeryMultiply: 563 if (!UseMontgomeryMultiplyIntrinsic) return true; 564 break; 565 case vmIntrinsics::_montgomerySquare: 566 if (!UseMontgomerySquareIntrinsic) return true; 567 break; 568 case vmIntrinsics::_bigIntegerRightShiftWorker: 569 case vmIntrinsics::_bigIntegerLeftShiftWorker: 570 break; 571 case vmIntrinsics::_addExactI: 572 case vmIntrinsics::_addExactL: 573 case vmIntrinsics::_decrementExactI: 574 case vmIntrinsics::_decrementExactL: 575 case vmIntrinsics::_incrementExactI: 576 case vmIntrinsics::_incrementExactL: 577 case vmIntrinsics::_multiplyExactI: 578 case vmIntrinsics::_multiplyExactL: 579 case vmIntrinsics::_negateExactI: 580 case vmIntrinsics::_negateExactL: 581 case vmIntrinsics::_subtractExactI: 582 case vmIntrinsics::_subtractExactL: 583 if (!UseMathExactIntrinsics || !InlineMathNatives) return true; 584 break; 585 case vmIntrinsics::_isDigit: 586 case vmIntrinsics::_isLowerCase: 587 case vmIntrinsics::_isUpperCase: 588 case vmIntrinsics::_isWhitespace: 589 if (!UseCharacterCompareIntrinsics) return true; 590 break; 591 case vmIntrinsics::_dcopySign: 592 case vmIntrinsics::_fcopySign: 593 if (!InlineMathNatives || !UseCopySignIntrinsic) return true; 594 break; 595 case vmIntrinsics::_dsignum: 596 case vmIntrinsics::_fsignum: 597 if (!InlineMathNatives || !UseSignumIntrinsic) return true; 598 break; 599 #endif // COMPILER2 600 default: 601 return false; 602 } 603 604 return false; 605 } 606 607 #define VM_INTRINSIC_INITIALIZE(id, klass, name, sig, flags) #id "\0" 608 static const char* vm_intrinsic_name_bodies = 609 VM_INTRINSICS_DO(VM_INTRINSIC_INITIALIZE, 610 VM_SYMBOL_IGNORE, VM_SYMBOL_IGNORE, VM_SYMBOL_IGNORE, VM_ALIAS_IGNORE); 611 612 static const char* vm_intrinsic_name_table[vmIntrinsics::number_of_intrinsics()]; 613 static TriBoolArray<(size_t)vmIntrinsics::number_of_intrinsics(), int> vm_intrinsic_control_words; 614 615 void vmIntrinsics::init_vm_intrinsic_name_table() { 616 const char** nt = &vm_intrinsic_name_table[0]; 617 char* string = (char*) &vm_intrinsic_name_bodies[0]; 618 619 for (auto index : EnumRange<vmIntrinsicID>{}) { 620 nt[as_int(index)] = string; 621 string += strlen(string); // skip string body 622 string += 1; // skip trailing null 623 } 624 assert(!strcmp(nt[as_int(vmIntrinsics::_hashCode)], "_hashCode"), "lined up"); 625 nt[as_int(vmIntrinsics::_none)] = "_none"; 626 } 627 628 const char* vmIntrinsics::name_at(vmIntrinsics::ID id) { 629 const char** nt = &vm_intrinsic_name_table[0]; 630 if (nt[as_int(_none)] == nullptr) { 631 init_vm_intrinsic_name_table(); 632 } 633 634 if (id < ID_LIMIT) 635 return vm_intrinsic_name_table[as_int(id)]; 636 else 637 return "(unknown intrinsic)"; 638 } 639 640 vmIntrinsics::ID vmIntrinsics::find_id(const char* name) { 641 const char** nt = &vm_intrinsic_name_table[0]; 642 if (nt[as_int(_none)] == nullptr) { 643 init_vm_intrinsic_name_table(); 644 } 645 646 for (auto index : EnumRange<vmIntrinsicID>{}) { 647 if (0 == strcmp(name, nt[as_int(index)])) { 648 return index; 649 } 650 } 651 652 return _none; 653 } 654 655 bool vmIntrinsics::is_intrinsic_available(vmIntrinsics::ID id) { 656 return VM_Version::is_intrinsic_supported(id) && !is_disabled_by_flags(id); 657 } 658 659 bool vmIntrinsics::is_disabled_by_flags(vmIntrinsics::ID id) { 660 assert(id > _none && id < ID_LIMIT, "must be a VM intrinsic"); 661 662 // not initialized yet, process Control/DisableIntrinsic 663 if (vm_intrinsic_control_words[as_int(_none)].is_default()) { 664 for (ControlIntrinsicIter iter(ControlIntrinsic); *iter != nullptr; ++iter) { 665 vmIntrinsics::ID id = vmIntrinsics::find_id(*iter); 666 667 if (id != vmIntrinsics::_none) { 668 vm_intrinsic_control_words[as_int(id)] = iter.is_enabled() && !disabled_by_jvm_flags(id); 669 } 670 } 671 672 // Order matters, DisableIntrinsic can overwrite ControlIntrinsic 673 for (ControlIntrinsicIter iter(DisableIntrinsic, true/*disable_all*/); *iter != nullptr; ++iter) { 674 vmIntrinsics::ID id = vmIntrinsics::find_id(*iter); 675 676 if (id != vmIntrinsics::_none) { 677 vm_intrinsic_control_words[as_int(id)] = false; 678 } 679 } 680 681 vm_intrinsic_control_words[as_int(_none)] = true; 682 } 683 684 TriBool b = vm_intrinsic_control_words[as_int(id)]; 685 if (b.is_default()) { 686 // unknown yet, query and cache it 687 b = vm_intrinsic_control_words[as_int(id)] = !disabled_by_jvm_flags(id); 688 } 689 690 return !b; 691 } 692 693 // These are for forming case labels: 694 #define ID3(x, y, z) (( jlong)(z) + \ 695 ((jlong)(y) << vmSymbols::log2_SID_LIMIT) + \ 696 ((jlong)(x) << (2*vmSymbols::log2_SID_LIMIT)) ) 697 #define SID_ENUM(n) VM_SYMBOL_ENUM_NAME(n) 698 699 vmIntrinsics::ID vmIntrinsics::find_id_impl(vmSymbolID holder, 700 vmSymbolID name, 701 vmSymbolID sig, 702 jshort flags) { 703 assert((int)vmSymbolID::SID_LIMIT <= (1<<vmSymbols::log2_SID_LIMIT), "must fit"); 704 705 // Let the C compiler build the decision tree. 706 707 #define VM_INTRINSIC_CASE(id, klass, name, sig, fcode) \ 708 case ID3(SID_ENUM(klass), SID_ENUM(name), SID_ENUM(sig)): \ 709 if (!match_##fcode(flags)) break; \ 710 return id; 711 712 switch (ID3(holder, name, sig)) { 713 VM_INTRINSICS_DO(VM_INTRINSIC_CASE, 714 VM_SYMBOL_IGNORE, VM_SYMBOL_IGNORE, VM_SYMBOL_IGNORE, VM_ALIAS_IGNORE); 715 } 716 return vmIntrinsics::_none; 717 718 #undef VM_INTRINSIC_CASE 719 } 720 721 class vmIntrinsicsLookup { 722 bool _class_map[vmSymbols::number_of_symbols()]; 723 724 constexpr int as_index(vmSymbolID id) const { 725 int index = vmSymbols::as_int(id); 726 assert(0 <= index && index < int(sizeof(_class_map)), "must be"); 727 return index; 728 } 729 730 constexpr void set_class_map(vmSymbolID id) { 731 _class_map[as_index(id)] = true; 732 } 733 734 public: 735 constexpr vmIntrinsicsLookup() : _class_map() { 736 737 #define VM_INTRINSIC_CLASS_MAP(id, klass, name, sig, fcode) \ 738 set_class_map(SID_ENUM(klass)); 739 740 VM_INTRINSICS_DO(VM_INTRINSIC_CLASS_MAP, 741 VM_SYMBOL_IGNORE, VM_SYMBOL_IGNORE, VM_SYMBOL_IGNORE, VM_ALIAS_IGNORE); 742 #undef VM_INTRINSIC_CLASS_MAP 743 744 745 // A few slightly irregular cases. See Method::init_intrinsic_id 746 set_class_map(SID_ENUM(java_lang_StrictMath)); 747 set_class_map(SID_ENUM(java_lang_invoke_MethodHandle)); 748 set_class_map(SID_ENUM(java_lang_invoke_VarHandle)); 749 } 750 751 bool class_has_intrinsics(vmSymbolID holder) const { 752 return _class_map[as_index(holder)]; 753 } 754 }; 755 756 constexpr vmIntrinsicsLookup _intrinsics_lookup; 757 758 bool vmIntrinsics::class_has_intrinsics(vmSymbolID holder) { 759 return _intrinsics_lookup.class_has_intrinsics(holder); 760 } 761 762 const char* vmIntrinsics::short_name_as_C_string(vmIntrinsics::ID id, char* buf, int buflen) { 763 const char* str = name_at(id); 764 #ifndef PRODUCT 765 const char* kname = vmSymbols::name_for(class_for(id)); 766 const char* mname = vmSymbols::name_for(name_for(id)); 767 const char* sname = vmSymbols::name_for(signature_for(id)); 768 const char* fname = ""; 769 switch (flags_for(id)) { 770 case F_Y: fname = "synchronized "; break; 771 case F_RN: fname = "native "; break; 772 case F_SN: fname = "native static "; break; 773 case F_S: fname = "static "; break; 774 default: break; 775 } 776 const char* kptr = strrchr(kname, JVM_SIGNATURE_SLASH); 777 if (kptr != nullptr) kname = kptr + 1; 778 int len = jio_snprintf(buf, buflen, "%s: %s%s.%s%s", 779 str, fname, kname, mname, sname); 780 if (len < buflen) 781 str = buf; 782 #endif //PRODUCT 783 return str; 784 } 785 786 787 // These are to get information about intrinsics. 788 789 #define ID4(x, y, z, f) ((ID3(x, y, z) << vmIntrinsics::log2_FLAG_LIMIT) | (jlong) (f)) 790 791 #ifndef PRODUCT 792 static const jlong intrinsic_info_array[vmIntrinsics::number_of_intrinsics()+1] = { 793 #define VM_INTRINSIC_INFO(ignore_id, klass, name, sig, fcode) \ 794 ID4(SID_ENUM(klass), SID_ENUM(name), SID_ENUM(sig), vmIntrinsics::fcode), 795 796 0, VM_INTRINSICS_DO(VM_INTRINSIC_INFO, 797 VM_SYMBOL_IGNORE, VM_SYMBOL_IGNORE, VM_SYMBOL_IGNORE, VM_ALIAS_IGNORE) 798 0 799 #undef VM_INTRINSIC_INFO 800 }; 801 802 inline jlong intrinsic_info(vmIntrinsics::ID id) { 803 return intrinsic_info_array[vmIntrinsics::as_int(id)]; 804 } 805 806 vmSymbolID vmIntrinsics::class_for(vmIntrinsics::ID id) { 807 jlong info = intrinsic_info(id); 808 int shift = 2*vmSymbols::log2_SID_LIMIT + log2_FLAG_LIMIT, mask = right_n_bits(vmSymbols::log2_SID_LIMIT); 809 assert(((ID4(1021,1022,1023,7) >> shift) & mask) == 1021, ""); 810 return vmSymbols::as_SID( checked_cast<int>((info >> shift) & mask)); 811 } 812 813 vmSymbolID vmIntrinsics::name_for(vmIntrinsics::ID id) { 814 jlong info = intrinsic_info(id); 815 int shift = vmSymbols::log2_SID_LIMIT + log2_FLAG_LIMIT, mask = right_n_bits(vmSymbols::log2_SID_LIMIT); 816 assert(((ID4(1021,1022,1023,7) >> shift) & mask) == 1022, ""); 817 return vmSymbols::as_SID( checked_cast<int>((info >> shift) & mask)); 818 } 819 820 vmSymbolID vmIntrinsics::signature_for(vmIntrinsics::ID id) { 821 jlong info = intrinsic_info(id); 822 int shift = log2_FLAG_LIMIT, mask = right_n_bits(vmSymbols::log2_SID_LIMIT); 823 assert(((ID4(1021,1022,1023,7) >> shift) & mask) == 1023, ""); 824 return vmSymbols::as_SID( checked_cast<int>((info >> shift) & mask)); 825 } 826 827 vmIntrinsics::Flags vmIntrinsics::flags_for(vmIntrinsics::ID id) { 828 jlong info = intrinsic_info(id); 829 int shift = 0, mask = right_n_bits(log2_FLAG_LIMIT); 830 assert(((ID4(1021,1022,1023,7) >> shift) & mask) == 7, ""); 831 return Flags( (info >> shift) & mask ); 832 } 833 #endif // !PRODUCT