1 /*
2 * Copyright (c) 2020, 2025, 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 "classfile/vmIntrinsics.hpp"
26 #include "classfile/vmSymbols.hpp"
27 #include "compiler/compilerDirectives.hpp"
28 #include "jvm_constants.h"
29 #include "jvm_io.h"
30 #ifdef COMPILER2
31 #include "opto/c2_globals.hpp"
32 #endif
33 #include "runtime/vm_version.hpp"
34 #include "utilities/checkedCast.hpp"
35 #include "utilities/tribool.hpp"
36
37 // These are flag-matching functions:
38 inline bool match_F_R(u2 flags) {
39 const int req = 0;
40 const int neg = JVM_ACC_STATIC | JVM_ACC_SYNCHRONIZED | JVM_ACC_NATIVE;
41 return (flags & (req | neg)) == req;
42 }
43
44 inline bool match_F_Y(u2 flags) {
45 const int req = JVM_ACC_SYNCHRONIZED;
46 const int neg = JVM_ACC_STATIC | JVM_ACC_NATIVE;
47 return (flags & (req | neg)) == req;
48 }
49
50 inline bool match_F_RN(u2 flags) {
51 const int req = JVM_ACC_NATIVE;
52 const int neg = JVM_ACC_STATIC | JVM_ACC_SYNCHRONIZED;
53 return (flags & (req | neg)) == req;
54 }
55
56 inline bool match_F_S(u2 flags) {
57 const int req = JVM_ACC_STATIC;
58 const int neg = JVM_ACC_SYNCHRONIZED | JVM_ACC_NATIVE;
59 return (flags & (req | neg)) == req;
60 }
61
62 inline bool match_F_SN(u2 flags) {
63 const int req = JVM_ACC_STATIC | JVM_ACC_NATIVE;
64 const int neg = JVM_ACC_SYNCHRONIZED;
65 return (flags & (req | neg)) == req;
66 }
67
68 bool vmIntrinsics::preserves_state(vmIntrinsics::ID id) {
69 assert(id != vmIntrinsics::_none, "must be a VM intrinsic");
70 switch(id) {
71 #ifdef JFR_HAVE_INTRINSICS
72 case vmIntrinsics::_counterTime:
73 #endif
74 case vmIntrinsics::_currentTimeMillis:
75 case vmIntrinsics::_nanoTime:
76 case vmIntrinsics::_floatToRawIntBits:
77 case vmIntrinsics::_intBitsToFloat:
78 case vmIntrinsics::_doubleToRawLongBits:
79 case vmIntrinsics::_longBitsToDouble:
80 case vmIntrinsics::_getClass:
81 case vmIntrinsics::_isInstance:
82 case vmIntrinsics::_currentCarrierThread:
83 case vmIntrinsics::_currentThread:
84 case vmIntrinsics::_scopedValueCache:
85 case vmIntrinsics::_dabs:
86 case vmIntrinsics::_fabs:
87 case vmIntrinsics::_iabs:
88 case vmIntrinsics::_labs:
89 case vmIntrinsics::_dsqrt:
90 case vmIntrinsics::_dsqrt_strict:
91 case vmIntrinsics::_dsin:
92 case vmIntrinsics::_dcos:
93 case vmIntrinsics::_dtan:
94 case vmIntrinsics::_dtanh:
95 case vmIntrinsics::_dlog:
96 case vmIntrinsics::_dlog10:
97 case vmIntrinsics::_dexp:
98 case vmIntrinsics::_dpow:
99 case vmIntrinsics::_Preconditions_checkIndex:
100 case vmIntrinsics::_Preconditions_checkLongIndex:
101 case vmIntrinsics::_Reference_get:
102 case vmIntrinsics::_Continuation_doYield:
103 case vmIntrinsics::_updateCRC32:
104 case vmIntrinsics::_updateBytesCRC32:
105 case vmIntrinsics::_updateByteBufferCRC32:
106 case vmIntrinsics::_updateBytesAdler32:
107 case vmIntrinsics::_vectorizedMismatch:
108 case vmIntrinsics::_fmaD:
109 case vmIntrinsics::_fmaF:
110 case vmIntrinsics::_isDigit:
111 case vmIntrinsics::_isLowerCase:
112 case vmIntrinsics::_isUpperCase:
113 case vmIntrinsics::_isWhitespace:
114 return true;
115 default:
116 return false;
117 }
118 }
119
120 bool vmIntrinsics::can_trap(vmIntrinsics::ID id) {
121 assert(id != vmIntrinsics::_none, "must be a VM intrinsic");
122 switch(id) {
123 #ifdef JFR_HAVE_INTRINSICS
124 case vmIntrinsics::_counterTime:
125 #endif
126 case vmIntrinsics::_currentTimeMillis:
127 case vmIntrinsics::_nanoTime:
128 case vmIntrinsics::_floatToRawIntBits:
129 case vmIntrinsics::_intBitsToFloat:
130 case vmIntrinsics::_doubleToRawLongBits:
131 case vmIntrinsics::_longBitsToDouble:
132 case vmIntrinsics::_currentCarrierThread:
133 case vmIntrinsics::_currentThread:
134 case vmIntrinsics::_setCurrentThread:
135 case vmIntrinsics::_scopedValueCache:
136 case vmIntrinsics::_setScopedValueCache:
137 case vmIntrinsics::_dabs:
138 case vmIntrinsics::_fabs:
139 case vmIntrinsics::_iabs:
140 case vmIntrinsics::_labs:
141 case vmIntrinsics::_dsqrt:
142 case vmIntrinsics::_dsqrt_strict:
143 case vmIntrinsics::_dsin:
144 case vmIntrinsics::_dcos:
145 case vmIntrinsics::_dtan:
146 case vmIntrinsics::_dtanh:
147 case vmIntrinsics::_dlog:
148 case vmIntrinsics::_dlog10:
149 case vmIntrinsics::_dexp:
150 case vmIntrinsics::_dpow:
151 case vmIntrinsics::_updateCRC32:
152 case vmIntrinsics::_updateBytesCRC32:
153 case vmIntrinsics::_updateByteBufferCRC32:
154 case vmIntrinsics::_vectorizedMismatch:
155 case vmIntrinsics::_fmaD:
156 case vmIntrinsics::_fmaF:
157 return false;
158 default:
159 return true;
160 }
161 }
162
163 // Some intrinsics produce different results if they are not pinned
164 bool vmIntrinsics::should_be_pinned(vmIntrinsics::ID id) {
165 assert(id != vmIntrinsics::_none, "must be a VM intrinsic");
166 switch(id) {
167 #ifdef JFR_HAVE_INTRINSICS
168 case vmIntrinsics::_counterTime:
169 #endif
170 case vmIntrinsics::_currentTimeMillis:
171 case vmIntrinsics::_nanoTime:
172 case vmIntrinsics::_blackhole:
173 return true;
174 default:
175 return false;
176 }
177 }
178
179 bool vmIntrinsics::does_virtual_dispatch(vmIntrinsics::ID id) {
180 assert(id != vmIntrinsics::_none, "must be a VM intrinsic");
181 switch(id) {
182 case vmIntrinsics::_hashCode:
183 case vmIntrinsics::_clone:
184 return true;
185 break;
186 default:
187 return false;
188 }
189 }
190
191 int vmIntrinsics::predicates_needed(vmIntrinsics::ID id) {
192 assert(id != vmIntrinsics::_none, "must be a VM intrinsic");
193 switch (id) {
194 case vmIntrinsics::_cipherBlockChaining_encryptAESCrypt:
195 case vmIntrinsics::_cipherBlockChaining_decryptAESCrypt:
196 case vmIntrinsics::_electronicCodeBook_encryptAESCrypt:
197 case vmIntrinsics::_electronicCodeBook_decryptAESCrypt:
198 case vmIntrinsics::_counterMode_AESCrypt:
199 case vmIntrinsics::_galoisCounterMode_AESCrypt:
200 return 1;
201 case vmIntrinsics::_digestBase_implCompressMB:
202 return 5;
203 default:
204 return 0;
205 }
206 }
207
208 bool vmIntrinsics::disabled_by_jvm_flags(vmIntrinsics::ID id) {
209 assert(id != vmIntrinsics::_none, "must be a VM intrinsic");
210
211 // -XX:-InlineNatives disables nearly all intrinsics except the ones listed in
212 // the following switch statement.
213 if (!InlineNatives) {
214 switch (id) {
215 case vmIntrinsics::_indexOfL:
216 case vmIntrinsics::_indexOfU:
217 case vmIntrinsics::_indexOfUL:
218 case vmIntrinsics::_indexOfIL:
219 case vmIntrinsics::_indexOfIU:
220 case vmIntrinsics::_indexOfIUL:
221 case vmIntrinsics::_indexOfU_char:
222 case vmIntrinsics::_indexOfL_char:
223 case vmIntrinsics::_compareToL:
224 case vmIntrinsics::_compareToU:
225 case vmIntrinsics::_compareToLU:
226 case vmIntrinsics::_compareToUL:
227 case vmIntrinsics::_equalsL:
228 case vmIntrinsics::_equalsC:
229 case vmIntrinsics::_vectorizedHashCode:
230 case vmIntrinsics::_getCharStringU:
231 case vmIntrinsics::_putCharStringU:
232 case vmIntrinsics::_compressStringC:
233 case vmIntrinsics::_compressStringB:
234 case vmIntrinsics::_inflateStringC:
235 case vmIntrinsics::_inflateStringB:
236 case vmIntrinsics::_getAndAddInt:
237 case vmIntrinsics::_getAndAddLong:
238 case vmIntrinsics::_getAndSetInt:
239 case vmIntrinsics::_getAndSetLong:
240 case vmIntrinsics::_getAndSetReference:
241 case vmIntrinsics::_loadFence:
242 case vmIntrinsics::_storeFence:
243 case vmIntrinsics::_fullFence:
244 case vmIntrinsics::_countPositives:
245 case vmIntrinsics::_Reference_get:
246 case vmIntrinsics::_Continuation_doYield:
247 case vmIntrinsics::_Continuation_enterSpecial:
248 case vmIntrinsics::_Continuation_pin:
249 case vmIntrinsics::_Continuation_unpin:
250 break;
251 default:
252 return true;
253 }
254 }
255
256 switch (id) {
257 case vmIntrinsics::_isInstance:
258 case vmIntrinsics::_isAssignableFrom:
259 case vmIntrinsics::_isHidden:
260 case vmIntrinsics::_getSuperclass:
261 case vmIntrinsics::_Class_cast:
262 case vmIntrinsics::_getLength:
263 case vmIntrinsics::_newArray:
264 case vmIntrinsics::_newNullRestrictedNonAtomicArray:
265 case vmIntrinsics::_newNullRestrictedAtomicArray:
266 case vmIntrinsics::_newNullableAtomicArray:
267 case vmIntrinsics::_getClass:
268 if (!InlineClassNatives) return true;
269 break;
270 case vmIntrinsics::_currentCarrierThread:
271 case vmIntrinsics::_currentThread:
272 if (!InlineThreadNatives) return true;
273 break;
274 case vmIntrinsics::_setCurrentThread:
275 case vmIntrinsics::_scopedValueCache:
276 case vmIntrinsics::_setScopedValueCache:
277 case vmIntrinsics::_floatToRawIntBits:
278 case vmIntrinsics::_intBitsToFloat:
279 case vmIntrinsics::_doubleToRawLongBits:
280 case vmIntrinsics::_longBitsToDouble:
281 case vmIntrinsics::_ceil:
282 case vmIntrinsics::_floor:
283 case vmIntrinsics::_rint:
284 case vmIntrinsics::_dabs:
285 case vmIntrinsics::_fabs:
286 case vmIntrinsics::_iabs:
287 case vmIntrinsics::_labs:
288 case vmIntrinsics::_dsqrt:
289 case vmIntrinsics::_dsqrt_strict:
290 case vmIntrinsics::_dsin:
291 case vmIntrinsics::_dcos:
292 case vmIntrinsics::_dtan:
293 case vmIntrinsics::_dtanh:
294 case vmIntrinsics::_dlog:
295 case vmIntrinsics::_dexp:
296 case vmIntrinsics::_dpow:
297 case vmIntrinsics::_dlog10:
298 case vmIntrinsics::_datan2:
299 case vmIntrinsics::_floatToIntBits:
300 case vmIntrinsics::_doubleToLongBits:
301 case vmIntrinsics::_min:
302 case vmIntrinsics::_max:
303 case vmIntrinsics::_maxF:
304 case vmIntrinsics::_minF:
305 case vmIntrinsics::_maxD:
306 case vmIntrinsics::_minD:
307 case vmIntrinsics::_min_strict:
308 case vmIntrinsics::_max_strict:
309 case vmIntrinsics::_maxF_strict:
310 case vmIntrinsics::_minF_strict:
311 case vmIntrinsics::_maxD_strict:
312 case vmIntrinsics::_minD_strict:
313 if (!InlineMathNatives) return true;
314 break;
315 case vmIntrinsics::_fmaD:
316 case vmIntrinsics::_fmaF:
317 if (!InlineMathNatives || !UseFMA) return true;
318 break;
319 case vmIntrinsics::_floatToFloat16:
320 case vmIntrinsics::_float16ToFloat:
321 if (!InlineIntrinsics) return true;
322 break;
323 case vmIntrinsics::_arraycopy:
324 if (!InlineArrayCopy) return true;
325 break;
326 case vmIntrinsics::_updateCRC32:
327 case vmIntrinsics::_updateBytesCRC32:
328 case vmIntrinsics::_updateByteBufferCRC32:
329 if (!UseCRC32Intrinsics) return true;
330 break;
331 case vmIntrinsics::_makePrivateBuffer:
332 case vmIntrinsics::_finishPrivateBuffer:
333 case vmIntrinsics::_getReference:
334 case vmIntrinsics::_getBoolean:
335 case vmIntrinsics::_getByte:
336 case vmIntrinsics::_getShort:
337 case vmIntrinsics::_getChar:
338 case vmIntrinsics::_getInt:
339 case vmIntrinsics::_getLong:
340 case vmIntrinsics::_getFloat:
341 case vmIntrinsics::_getDouble:
342 case vmIntrinsics::_getValue:
343 case vmIntrinsics::_putReference:
344 case vmIntrinsics::_putBoolean:
345 case vmIntrinsics::_putByte:
346 case vmIntrinsics::_putShort:
347 case vmIntrinsics::_putChar:
348 case vmIntrinsics::_putInt:
349 case vmIntrinsics::_putLong:
350 case vmIntrinsics::_putFloat:
351 case vmIntrinsics::_putDouble:
352 case vmIntrinsics::_putValue:
353 case vmIntrinsics::_getReferenceVolatile:
354 case vmIntrinsics::_getBooleanVolatile:
355 case vmIntrinsics::_getByteVolatile:
356 case vmIntrinsics::_getShortVolatile:
357 case vmIntrinsics::_getCharVolatile:
358 case vmIntrinsics::_getIntVolatile:
359 case vmIntrinsics::_getLongVolatile:
360 case vmIntrinsics::_getFloatVolatile:
361 case vmIntrinsics::_getDoubleVolatile:
362 case vmIntrinsics::_putReferenceVolatile:
363 case vmIntrinsics::_putBooleanVolatile:
364 case vmIntrinsics::_putByteVolatile:
365 case vmIntrinsics::_putShortVolatile:
366 case vmIntrinsics::_putCharVolatile:
367 case vmIntrinsics::_putIntVolatile:
368 case vmIntrinsics::_putLongVolatile:
369 case vmIntrinsics::_putFloatVolatile:
370 case vmIntrinsics::_putDoubleVolatile:
371 case vmIntrinsics::_getReferenceAcquire:
372 case vmIntrinsics::_getBooleanAcquire:
373 case vmIntrinsics::_getByteAcquire:
374 case vmIntrinsics::_getShortAcquire:
375 case vmIntrinsics::_getCharAcquire:
376 case vmIntrinsics::_getIntAcquire:
377 case vmIntrinsics::_getLongAcquire:
378 case vmIntrinsics::_getFloatAcquire:
379 case vmIntrinsics::_getDoubleAcquire:
380 case vmIntrinsics::_putReferenceRelease:
381 case vmIntrinsics::_putBooleanRelease:
382 case vmIntrinsics::_putByteRelease:
383 case vmIntrinsics::_putShortRelease:
384 case vmIntrinsics::_putCharRelease:
385 case vmIntrinsics::_putIntRelease:
386 case vmIntrinsics::_putLongRelease:
387 case vmIntrinsics::_putFloatRelease:
388 case vmIntrinsics::_putDoubleRelease:
389 case vmIntrinsics::_getReferenceOpaque:
390 case vmIntrinsics::_getBooleanOpaque:
391 case vmIntrinsics::_getByteOpaque:
392 case vmIntrinsics::_getShortOpaque:
393 case vmIntrinsics::_getCharOpaque:
394 case vmIntrinsics::_getIntOpaque:
395 case vmIntrinsics::_getLongOpaque:
396 case vmIntrinsics::_getFloatOpaque:
397 case vmIntrinsics::_getDoubleOpaque:
398 case vmIntrinsics::_putReferenceOpaque:
399 case vmIntrinsics::_putBooleanOpaque:
400 case vmIntrinsics::_putByteOpaque:
401 case vmIntrinsics::_putShortOpaque:
402 case vmIntrinsics::_putCharOpaque:
403 case vmIntrinsics::_putIntOpaque:
404 case vmIntrinsics::_putLongOpaque:
405 case vmIntrinsics::_putFloatOpaque:
406 case vmIntrinsics::_putDoubleOpaque:
407 case vmIntrinsics::_getAndAddInt:
408 case vmIntrinsics::_getAndAddLong:
409 case vmIntrinsics::_getAndSetInt:
410 case vmIntrinsics::_getAndSetLong:
411 case vmIntrinsics::_getAndSetReference:
412 case vmIntrinsics::_loadFence:
413 case vmIntrinsics::_storeFence:
414 case vmIntrinsics::_fullFence:
415 case vmIntrinsics::_compareAndSetLong:
416 case vmIntrinsics::_weakCompareAndSetLong:
417 case vmIntrinsics::_weakCompareAndSetLongPlain:
418 case vmIntrinsics::_weakCompareAndSetLongAcquire:
419 case vmIntrinsics::_weakCompareAndSetLongRelease:
420 case vmIntrinsics::_compareAndSetInt:
421 case vmIntrinsics::_weakCompareAndSetInt:
422 case vmIntrinsics::_weakCompareAndSetIntPlain:
423 case vmIntrinsics::_weakCompareAndSetIntAcquire:
424 case vmIntrinsics::_weakCompareAndSetIntRelease:
425 case vmIntrinsics::_compareAndSetReference:
426 case vmIntrinsics::_weakCompareAndSetReference:
427 case vmIntrinsics::_weakCompareAndSetReferencePlain:
428 case vmIntrinsics::_weakCompareAndSetReferenceAcquire:
429 case vmIntrinsics::_weakCompareAndSetReferenceRelease:
430 case vmIntrinsics::_compareAndExchangeInt:
431 case vmIntrinsics::_compareAndExchangeIntAcquire:
432 case vmIntrinsics::_compareAndExchangeIntRelease:
433 case vmIntrinsics::_compareAndExchangeLong:
434 case vmIntrinsics::_compareAndExchangeLongAcquire:
435 case vmIntrinsics::_compareAndExchangeLongRelease:
436 case vmIntrinsics::_compareAndExchangeReference:
437 case vmIntrinsics::_compareAndExchangeReferenceAcquire:
438 case vmIntrinsics::_compareAndExchangeReferenceRelease:
439 case vmIntrinsics::_allocateInstance:
440 if (!InlineUnsafeOps) return true;
441 break;
442 case vmIntrinsics::_getShortUnaligned:
443 case vmIntrinsics::_getCharUnaligned:
444 case vmIntrinsics::_getIntUnaligned:
445 case vmIntrinsics::_getLongUnaligned:
446 case vmIntrinsics::_putShortUnaligned:
447 case vmIntrinsics::_putCharUnaligned:
448 case vmIntrinsics::_putIntUnaligned:
449 case vmIntrinsics::_putLongUnaligned:
450 if (!InlineUnsafeOps || !UseUnalignedAccesses) return true;
451 break;
452 case vmIntrinsics::_hashCode:
453 if (!InlineObjectHash) return true;
454 break;
455 case vmIntrinsics::_aescrypt_encryptBlock:
456 case vmIntrinsics::_aescrypt_decryptBlock:
457 if (!UseAESIntrinsics) return true;
458 break;
459 case vmIntrinsics::_cipherBlockChaining_encryptAESCrypt:
460 case vmIntrinsics::_cipherBlockChaining_decryptAESCrypt:
461 if (!UseAESIntrinsics) return true;
462 break;
463 case vmIntrinsics::_electronicCodeBook_encryptAESCrypt:
464 case vmIntrinsics::_electronicCodeBook_decryptAESCrypt:
465 if (!UseAESIntrinsics) return true;
466 break;
467 case vmIntrinsics::_counterMode_AESCrypt:
468 if (!UseAESCTRIntrinsics) return true;
469 break;
470 case vmIntrinsics::_galoisCounterMode_AESCrypt:
471 if (!UseAESIntrinsics) return true;
472 break;
473 case vmIntrinsics::_md5_implCompress:
474 if (!UseMD5Intrinsics) return true;
475 break;
476 case vmIntrinsics::_sha_implCompress:
477 if (!UseSHA1Intrinsics) return true;
478 break;
479 case vmIntrinsics::_sha2_implCompress:
480 if (!UseSHA256Intrinsics) return true;
481 break;
482 case vmIntrinsics::_sha5_implCompress:
483 if (!UseSHA512Intrinsics) return true;
484 break;
485 case vmIntrinsics::_double_keccak:
486 case vmIntrinsics::_sha3_implCompress:
487 if (!UseSHA3Intrinsics) return true;
488 break;
489 case vmIntrinsics::_digestBase_implCompressMB:
490 if (!(UseMD5Intrinsics || UseSHA1Intrinsics || UseSHA256Intrinsics || UseSHA512Intrinsics || UseSHA3Intrinsics)) return true;
491 break;
492 case vmIntrinsics::_ghash_processBlocks:
493 if (!UseGHASHIntrinsics) return true;
494 break;
495 case vmIntrinsics::_chacha20Block:
496 if (!UseChaCha20Intrinsics) return true;
497 break;
498 case vmIntrinsics::_dilithiumAlmostNtt:
499 case vmIntrinsics::_dilithiumAlmostInverseNtt:
500 case vmIntrinsics::_dilithiumNttMult:
501 case vmIntrinsics::_dilithiumMontMulByConstant:
502 case vmIntrinsics::_dilithiumDecomposePoly:
503 if (!UseDilithiumIntrinsics) return true;
504 break;
505 case vmIntrinsics::_base64_encodeBlock:
506 case vmIntrinsics::_base64_decodeBlock:
507 if (!UseBASE64Intrinsics) return true;
508 break;
509 case vmIntrinsics::_poly1305_processBlocks:
510 if (!UsePoly1305Intrinsics) return true;
511 break;
512 case vmIntrinsics::_intpoly_montgomeryMult_P256:
513 case vmIntrinsics::_intpoly_assign:
514 if (!UseIntPolyIntrinsics) return true;
515 break;
516 case vmIntrinsics::_updateBytesCRC32C:
517 case vmIntrinsics::_updateDirectByteBufferCRC32C:
518 if (!UseCRC32CIntrinsics) return true;
519 break;
520 case vmIntrinsics::_vectorizedMismatch:
521 if (!UseVectorizedMismatchIntrinsic) return true;
522 break;
523 case vmIntrinsics::_updateBytesAdler32:
524 case vmIntrinsics::_updateByteBufferAdler32:
525 if (!UseAdler32Intrinsics) return true;
526 break;
527 case vmIntrinsics::_copyMemory:
528 if (!InlineArrayCopy || !InlineUnsafeOps) return true;
529 break;
530 case vmIntrinsics::_setMemory:
531 if (!InlineUnsafeOps) return true;
532 break;
533 #ifdef COMPILER2
534 case vmIntrinsics::_clone:
535 case vmIntrinsics::_copyOf:
536 case vmIntrinsics::_copyOfRange:
537 // These intrinsics use both the objectcopy and the arraycopy
538 // intrinsic mechanism.
539 if (!InlineObjectCopy || !InlineArrayCopy) return true;
540 break;
541 case vmIntrinsics::_compareToL:
542 case vmIntrinsics::_compareToU:
543 case vmIntrinsics::_compareToLU:
544 case vmIntrinsics::_compareToUL:
545 if (!SpecialStringCompareTo) return true;
546 break;
547 case vmIntrinsics::_indexOfL:
548 case vmIntrinsics::_indexOfU:
549 case vmIntrinsics::_indexOfUL:
550 case vmIntrinsics::_indexOfIL:
551 case vmIntrinsics::_indexOfIU:
552 case vmIntrinsics::_indexOfIUL:
553 case vmIntrinsics::_indexOfU_char:
554 case vmIntrinsics::_indexOfL_char:
555 if (!SpecialStringIndexOf) return true;
556 break;
557 case vmIntrinsics::_equalsL:
558 if (!SpecialStringEquals) return true;
559 break;
560 case vmIntrinsics::_vectorizedHashCode:
561 if (!UseVectorizedHashCodeIntrinsic) return true;
562 break;
563 case vmIntrinsics::_equalsB:
564 case vmIntrinsics::_equalsC:
565 if (!SpecialArraysEquals) return true;
566 break;
567 case vmIntrinsics::_encodeISOArray:
568 case vmIntrinsics::_encodeAsciiArray:
569 case vmIntrinsics::_encodeByteISOArray:
570 if (!SpecialEncodeISOArray) return true;
571 break;
572 case vmIntrinsics::_getCallerClass:
573 if (!InlineReflectionGetCallerClass) return true;
574 break;
575 case vmIntrinsics::_multiplyToLen:
576 if (!UseMultiplyToLenIntrinsic) return true;
577 break;
578 case vmIntrinsics::_squareToLen:
579 if (!UseSquareToLenIntrinsic) return true;
580 break;
581 case vmIntrinsics::_mulAdd:
582 if (!UseMulAddIntrinsic) return true;
583 break;
584 case vmIntrinsics::_montgomeryMultiply:
585 if (!UseMontgomeryMultiplyIntrinsic) return true;
586 break;
587 case vmIntrinsics::_montgomerySquare:
588 if (!UseMontgomerySquareIntrinsic) return true;
589 break;
590 case vmIntrinsics::_bigIntegerRightShiftWorker:
591 case vmIntrinsics::_bigIntegerLeftShiftWorker:
592 break;
593 case vmIntrinsics::_addExactI:
594 case vmIntrinsics::_addExactL:
595 case vmIntrinsics::_decrementExactI:
596 case vmIntrinsics::_decrementExactL:
597 case vmIntrinsics::_incrementExactI:
598 case vmIntrinsics::_incrementExactL:
599 case vmIntrinsics::_multiplyExactI:
600 case vmIntrinsics::_multiplyExactL:
601 case vmIntrinsics::_negateExactI:
602 case vmIntrinsics::_negateExactL:
603 case vmIntrinsics::_subtractExactI:
604 case vmIntrinsics::_subtractExactL:
605 if (!UseMathExactIntrinsics || !InlineMathNatives) return true;
606 break;
607 case vmIntrinsics::_isDigit:
608 case vmIntrinsics::_isLowerCase:
609 case vmIntrinsics::_isUpperCase:
610 case vmIntrinsics::_isWhitespace:
611 if (!UseCharacterCompareIntrinsics) return true;
612 break;
613 case vmIntrinsics::_dcopySign:
614 case vmIntrinsics::_fcopySign:
615 if (!InlineMathNatives || !UseCopySignIntrinsic) return true;
616 break;
617 case vmIntrinsics::_dsignum:
618 case vmIntrinsics::_fsignum:
619 if (!InlineMathNatives || !UseSignumIntrinsic) return true;
620 break;
621 #endif // COMPILER2
622 default:
623 return false;
624 }
625
626 return false;
627 }
628
629 #define VM_INTRINSIC_INITIALIZE(id, klass, name, sig, flags) #id "\0"
630 static const char* vm_intrinsic_name_bodies =
631 VM_INTRINSICS_DO(VM_INTRINSIC_INITIALIZE,
632 VM_SYMBOL_IGNORE, VM_SYMBOL_IGNORE, VM_SYMBOL_IGNORE, VM_ALIAS_IGNORE);
633
634 static const char* vm_intrinsic_name_table[vmIntrinsics::number_of_intrinsics()];
635 static TriBoolArray<(size_t)vmIntrinsics::number_of_intrinsics(), int> vm_intrinsic_control_words;
636
637 void vmIntrinsics::init_vm_intrinsic_name_table() {
638 const char** nt = &vm_intrinsic_name_table[0];
639 char* string = (char*) &vm_intrinsic_name_bodies[0];
640
641 for (auto index : EnumRange<vmIntrinsicID>{}) {
642 nt[as_int(index)] = string;
643 string += strlen(string); // skip string body
644 string += 1; // skip trailing null
645 }
646 assert(!strcmp(nt[as_int(vmIntrinsics::_hashCode)], "_hashCode"), "lined up");
647 nt[as_int(vmIntrinsics::_none)] = "_none";
648 }
649
650 const char* vmIntrinsics::name_at(vmIntrinsics::ID id) {
651 const char** nt = &vm_intrinsic_name_table[0];
652 if (nt[as_int(_none)] == nullptr) {
653 init_vm_intrinsic_name_table();
654 }
655
656 if (id < ID_LIMIT)
657 return vm_intrinsic_name_table[as_int(id)];
658 else
659 return "(unknown intrinsic)";
660 }
661
662 vmIntrinsics::ID vmIntrinsics::find_id(const char* name) {
663 const char** nt = &vm_intrinsic_name_table[0];
664 if (nt[as_int(_none)] == nullptr) {
665 init_vm_intrinsic_name_table();
666 }
667
668 for (auto index : EnumRange<vmIntrinsicID>{}) {
669 if (0 == strcmp(name, nt[as_int(index)])) {
670 return index;
671 }
672 }
673
674 return _none;
675 }
676
677 bool vmIntrinsics::is_intrinsic_available(vmIntrinsics::ID id) {
678 return VM_Version::is_intrinsic_supported(id) && !is_disabled_by_flags(id);
679 }
680
681 bool vmIntrinsics::is_disabled_by_flags(vmIntrinsics::ID id) {
682 assert(id > _none && id < ID_LIMIT, "must be a VM intrinsic");
683
684 // not initialized yet, process Control/DisableIntrinsic
685 if (vm_intrinsic_control_words[as_int(_none)].is_default()) {
686 for (ControlIntrinsicIter iter(ControlIntrinsic); *iter != nullptr; ++iter) {
687 vmIntrinsics::ID id = vmIntrinsics::find_id(*iter);
688
689 if (id != vmIntrinsics::_none) {
690 vm_intrinsic_control_words[as_int(id)] = iter.is_enabled() && !disabled_by_jvm_flags(id);
691 }
692 }
693
694 // Order matters, DisableIntrinsic can overwrite ControlIntrinsic
695 for (ControlIntrinsicIter iter(DisableIntrinsic, true/*disable_all*/); *iter != nullptr; ++iter) {
696 vmIntrinsics::ID id = vmIntrinsics::find_id(*iter);
697
698 if (id != vmIntrinsics::_none) {
699 vm_intrinsic_control_words[as_int(id)] = false;
700 }
701 }
702
703 vm_intrinsic_control_words[as_int(_none)] = true;
704 }
705
706 TriBool b = vm_intrinsic_control_words[as_int(id)];
707 if (b.is_default()) {
708 // unknown yet, query and cache it
709 b = vm_intrinsic_control_words[as_int(id)] = !disabled_by_jvm_flags(id);
710 }
711
712 return !b;
713 }
714
715 // These are for forming case labels:
716 #define ID3(x, y, z) (( jlong)(z) + \
717 ((jlong)(y) << vmSymbols::log2_SID_LIMIT) + \
718 ((jlong)(x) << (2*vmSymbols::log2_SID_LIMIT)) )
719 #define SID_ENUM(n) VM_SYMBOL_ENUM_NAME(n)
720
721 vmIntrinsics::ID vmIntrinsics::find_id_impl(vmSymbolID holder,
722 vmSymbolID name,
723 vmSymbolID sig,
724 u2 flags) {
725 assert((int)vmSymbolID::SID_LIMIT <= (1<<vmSymbols::log2_SID_LIMIT), "must fit");
726
727 // Let the C compiler build the decision tree.
728
729 #define VM_INTRINSIC_CASE(id, klass, name, sig, fcode) \
730 case ID3(SID_ENUM(klass), SID_ENUM(name), SID_ENUM(sig)): \
731 if (!match_##fcode(flags)) break; \
732 return id;
733
734 switch (ID3(holder, name, sig)) {
735 VM_INTRINSICS_DO(VM_INTRINSIC_CASE,
736 VM_SYMBOL_IGNORE, VM_SYMBOL_IGNORE, VM_SYMBOL_IGNORE, VM_ALIAS_IGNORE);
737 }
738 return vmIntrinsics::_none;
739
740 #undef VM_INTRINSIC_CASE
741 }
742
743 class vmIntrinsicsLookup {
744 bool _class_map[vmSymbols::number_of_symbols()];
745
746 constexpr int as_index(vmSymbolID id) const {
747 int index = vmSymbols::as_int(id);
748 assert(0 <= index && index < int(sizeof(_class_map)), "must be");
749 return index;
750 }
751
752 constexpr void set_class_map(vmSymbolID id) {
753 _class_map[as_index(id)] = true;
754 }
755
756 public:
757 constexpr vmIntrinsicsLookup() : _class_map() {
758
759 #define VM_INTRINSIC_CLASS_MAP(id, klass, name, sig, fcode) \
760 set_class_map(SID_ENUM(klass));
761
762 VM_INTRINSICS_DO(VM_INTRINSIC_CLASS_MAP,
763 VM_SYMBOL_IGNORE, VM_SYMBOL_IGNORE, VM_SYMBOL_IGNORE, VM_ALIAS_IGNORE);
764 #undef VM_INTRINSIC_CLASS_MAP
765
766
767 // A few slightly irregular cases. See Method::init_intrinsic_id
768 set_class_map(SID_ENUM(java_lang_StrictMath));
769 set_class_map(SID_ENUM(java_lang_invoke_MethodHandle));
770 set_class_map(SID_ENUM(java_lang_invoke_VarHandle));
771 }
772
773 bool class_has_intrinsics(vmSymbolID holder) const {
774 return _class_map[as_index(holder)];
775 }
776 };
777
778 constexpr vmIntrinsicsLookup _intrinsics_lookup;
779
780 bool vmIntrinsics::class_has_intrinsics(vmSymbolID holder) {
781 return _intrinsics_lookup.class_has_intrinsics(holder);
782 }
783
784 const char* vmIntrinsics::short_name_as_C_string(vmIntrinsics::ID id, char* buf, int buflen) {
785 const char* str = name_at(id);
786 #ifndef PRODUCT
787 const char* kname = vmSymbols::name_for(class_for(id));
788 const char* mname = vmSymbols::name_for(name_for(id));
789 const char* sname = vmSymbols::name_for(signature_for(id));
790 const char* fname = "";
791 switch (flags_for(id)) {
792 case F_Y: fname = "synchronized "; break;
793 case F_RN: fname = "native "; break;
794 case F_SN: fname = "native static "; break;
795 case F_S: fname = "static "; break;
796 default: break;
797 }
798 const char* kptr = strrchr(kname, JVM_SIGNATURE_SLASH);
799 if (kptr != nullptr) kname = kptr + 1;
800 int len = jio_snprintf(buf, buflen, "%s: %s%s.%s%s",
801 str, fname, kname, mname, sname);
802 if (len < buflen)
803 str = buf;
804 #endif //PRODUCT
805 return str;
806 }
807
808
809 // These are to get information about intrinsics.
810
811 #define ID4(x, y, z, f) ((ID3(x, y, z) << vmIntrinsics::log2_FLAG_LIMIT) | (jlong) (f))
812
813 #ifndef PRODUCT
814 static const jlong intrinsic_info_array[vmIntrinsics::number_of_intrinsics()+1] = {
815 #define VM_INTRINSIC_INFO(ignore_id, klass, name, sig, fcode) \
816 ID4(SID_ENUM(klass), SID_ENUM(name), SID_ENUM(sig), vmIntrinsics::fcode),
817
818 0, VM_INTRINSICS_DO(VM_INTRINSIC_INFO,
819 VM_SYMBOL_IGNORE, VM_SYMBOL_IGNORE, VM_SYMBOL_IGNORE, VM_ALIAS_IGNORE)
820 0
821 #undef VM_INTRINSIC_INFO
822 };
823
824 inline jlong intrinsic_info(vmIntrinsics::ID id) {
825 return intrinsic_info_array[vmIntrinsics::as_int(id)];
826 }
827
828 vmSymbolID vmIntrinsics::class_for(vmIntrinsics::ID id) {
829 jlong info = intrinsic_info(id);
830 int shift = 2*vmSymbols::log2_SID_LIMIT + log2_FLAG_LIMIT, mask = right_n_bits(vmSymbols::log2_SID_LIMIT);
831 assert(((ID4(1021,1022,1023,7) >> shift) & mask) == 1021, "");
832 return vmSymbols::as_SID( checked_cast<int>((info >> shift) & mask));
833 }
834
835 vmSymbolID vmIntrinsics::name_for(vmIntrinsics::ID id) {
836 jlong info = intrinsic_info(id);
837 int shift = vmSymbols::log2_SID_LIMIT + log2_FLAG_LIMIT, mask = right_n_bits(vmSymbols::log2_SID_LIMIT);
838 assert(((ID4(1021,1022,1023,7) >> shift) & mask) == 1022, "");
839 return vmSymbols::as_SID( checked_cast<int>((info >> shift) & mask));
840 }
841
842 vmSymbolID vmIntrinsics::signature_for(vmIntrinsics::ID id) {
843 jlong info = intrinsic_info(id);
844 int shift = log2_FLAG_LIMIT, mask = right_n_bits(vmSymbols::log2_SID_LIMIT);
845 assert(((ID4(1021,1022,1023,7) >> shift) & mask) == 1023, "");
846 return vmSymbols::as_SID( checked_cast<int>((info >> shift) & mask));
847 }
848
849 vmIntrinsics::Flags vmIntrinsics::flags_for(vmIntrinsics::ID id) {
850 jlong info = intrinsic_info(id);
851 int shift = 0, mask = right_n_bits(log2_FLAG_LIMIT);
852 assert(((ID4(1021,1022,1023,7) >> shift) & mask) == 7, "");
853 return Flags( (info >> shift) & mask );
854 }
855 #endif // !PRODUCT