1 /*
2 * Copyright (c) 2020, 2024, 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::_dtanh:
94 case vmIntrinsics::_dlog:
95 case vmIntrinsics::_dlog10:
96 case vmIntrinsics::_dexp:
97 case vmIntrinsics::_dpow:
98 case vmIntrinsics::_Preconditions_checkIndex:
99 case vmIntrinsics::_Preconditions_checkLongIndex:
100 case vmIntrinsics::_Reference_get:
101 case vmIntrinsics::_Continuation_doYield:
102 case vmIntrinsics::_updateCRC32:
103 case vmIntrinsics::_updateBytesCRC32:
104 case vmIntrinsics::_updateByteBufferCRC32:
105 case vmIntrinsics::_updateBytesAdler32:
106 case vmIntrinsics::_vectorizedMismatch:
107 case vmIntrinsics::_fmaD:
108 case vmIntrinsics::_fmaF:
109 case vmIntrinsics::_isDigit:
110 case vmIntrinsics::_isLowerCase:
111 case vmIntrinsics::_isUpperCase:
112 case vmIntrinsics::_isWhitespace:
113 return true;
114 default:
115 return false;
116 }
117 }
118
119 bool vmIntrinsics::can_trap(vmIntrinsics::ID id) {
120 assert(id != vmIntrinsics::_none, "must be a VM intrinsic");
121 switch(id) {
122 #ifdef JFR_HAVE_INTRINSICS
123 case vmIntrinsics::_counterTime:
124 #endif
125 case vmIntrinsics::_currentTimeMillis:
126 case vmIntrinsics::_nanoTime:
127 case vmIntrinsics::_floatToRawIntBits:
128 case vmIntrinsics::_intBitsToFloat:
129 case vmIntrinsics::_doubleToRawLongBits:
130 case vmIntrinsics::_longBitsToDouble:
131 case vmIntrinsics::_currentCarrierThread:
132 case vmIntrinsics::_currentThread:
133 case vmIntrinsics::_setCurrentThread:
134 case vmIntrinsics::_setCurrentLockId:
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::_getModifiers:
260 case vmIntrinsics::_isInterface:
261 case vmIntrinsics::_isArray:
262 case vmIntrinsics::_isPrimitive:
263 case vmIntrinsics::_isHidden:
264 case vmIntrinsics::_getSuperclass:
265 case vmIntrinsics::_Class_cast:
266 case vmIntrinsics::_getLength:
267 case vmIntrinsics::_newArray:
268 case vmIntrinsics::_getClass:
269 if (!InlineClassNatives) return true;
270 break;
271 case vmIntrinsics::_currentCarrierThread:
272 case vmIntrinsics::_currentThread:
273 if (!InlineThreadNatives) return true;
274 break;
275 case vmIntrinsics::_setCurrentThread:
276 case vmIntrinsics::_scopedValueCache:
277 case vmIntrinsics::_setScopedValueCache:
278 case vmIntrinsics::_floatToRawIntBits:
279 case vmIntrinsics::_intBitsToFloat:
280 case vmIntrinsics::_doubleToRawLongBits:
281 case vmIntrinsics::_longBitsToDouble:
282 case vmIntrinsics::_ceil:
283 case vmIntrinsics::_floor:
284 case vmIntrinsics::_rint:
285 case vmIntrinsics::_dabs:
286 case vmIntrinsics::_fabs:
287 case vmIntrinsics::_iabs:
288 case vmIntrinsics::_labs:
289 case vmIntrinsics::_dsqrt:
290 case vmIntrinsics::_dsqrt_strict:
291 case vmIntrinsics::_dsin:
292 case vmIntrinsics::_dcos:
293 case vmIntrinsics::_dtan:
294 case vmIntrinsics::_dtanh:
295 case vmIntrinsics::_dlog:
296 case vmIntrinsics::_dexp:
297 case vmIntrinsics::_dpow:
298 case vmIntrinsics::_dlog10:
299 case vmIntrinsics::_datan2:
300 case vmIntrinsics::_floatToIntBits:
301 case vmIntrinsics::_doubleToLongBits:
302 case vmIntrinsics::_min:
303 case vmIntrinsics::_max:
304 case vmIntrinsics::_maxF:
305 case vmIntrinsics::_minF:
306 case vmIntrinsics::_maxD:
307 case vmIntrinsics::_minD:
308 case vmIntrinsics::_min_strict:
309 case vmIntrinsics::_max_strict:
310 case vmIntrinsics::_maxF_strict:
311 case vmIntrinsics::_minF_strict:
312 case vmIntrinsics::_maxD_strict:
313 case vmIntrinsics::_minD_strict:
314 if (!InlineMathNatives) return true;
315 break;
316 case vmIntrinsics::_fmaD:
317 case vmIntrinsics::_fmaF:
318 if (!InlineMathNatives || !UseFMA) return true;
319 break;
320 case vmIntrinsics::_floatToFloat16:
321 case vmIntrinsics::_float16ToFloat:
322 if (!InlineIntrinsics) return true;
323 break;
324 case vmIntrinsics::_arraycopy:
325 if (!InlineArrayCopy) return true;
326 break;
327 case vmIntrinsics::_updateCRC32:
328 case vmIntrinsics::_updateBytesCRC32:
329 case vmIntrinsics::_updateByteBufferCRC32:
330 if (!UseCRC32Intrinsics) return true;
331 break;
332 case vmIntrinsics::_getReference:
333 case vmIntrinsics::_getBoolean:
334 case vmIntrinsics::_getByte:
335 case vmIntrinsics::_getShort:
336 case vmIntrinsics::_getChar:
337 case vmIntrinsics::_getInt:
338 case vmIntrinsics::_getLong:
339 case vmIntrinsics::_getFloat:
340 case vmIntrinsics::_getDouble:
341 case vmIntrinsics::_putReference:
342 case vmIntrinsics::_putBoolean:
343 case vmIntrinsics::_putByte:
344 case vmIntrinsics::_putShort:
345 case vmIntrinsics::_putChar:
346 case vmIntrinsics::_putInt:
347 case vmIntrinsics::_putLong:
348 case vmIntrinsics::_putFloat:
349 case vmIntrinsics::_putDouble:
350 case vmIntrinsics::_getReferenceVolatile:
351 case vmIntrinsics::_getBooleanVolatile:
352 case vmIntrinsics::_getByteVolatile:
353 case vmIntrinsics::_getShortVolatile:
354 case vmIntrinsics::_getCharVolatile:
355 case vmIntrinsics::_getIntVolatile:
356 case vmIntrinsics::_getLongVolatile:
357 case vmIntrinsics::_getFloatVolatile:
358 case vmIntrinsics::_getDoubleVolatile:
359 case vmIntrinsics::_putReferenceVolatile:
360 case vmIntrinsics::_putBooleanVolatile:
361 case vmIntrinsics::_putByteVolatile:
362 case vmIntrinsics::_putShortVolatile:
363 case vmIntrinsics::_putCharVolatile:
364 case vmIntrinsics::_putIntVolatile:
365 case vmIntrinsics::_putLongVolatile:
366 case vmIntrinsics::_putFloatVolatile:
367 case vmIntrinsics::_putDoubleVolatile:
368 case vmIntrinsics::_getReferenceAcquire:
369 case vmIntrinsics::_getBooleanAcquire:
370 case vmIntrinsics::_getByteAcquire:
371 case vmIntrinsics::_getShortAcquire:
372 case vmIntrinsics::_getCharAcquire:
373 case vmIntrinsics::_getIntAcquire:
374 case vmIntrinsics::_getLongAcquire:
375 case vmIntrinsics::_getFloatAcquire:
376 case vmIntrinsics::_getDoubleAcquire:
377 case vmIntrinsics::_putReferenceRelease:
378 case vmIntrinsics::_putBooleanRelease:
379 case vmIntrinsics::_putByteRelease:
380 case vmIntrinsics::_putShortRelease:
381 case vmIntrinsics::_putCharRelease:
382 case vmIntrinsics::_putIntRelease:
383 case vmIntrinsics::_putLongRelease:
384 case vmIntrinsics::_putFloatRelease:
385 case vmIntrinsics::_putDoubleRelease:
386 case vmIntrinsics::_getReferenceOpaque:
387 case vmIntrinsics::_getBooleanOpaque:
388 case vmIntrinsics::_getByteOpaque:
389 case vmIntrinsics::_getShortOpaque:
390 case vmIntrinsics::_getCharOpaque:
391 case vmIntrinsics::_getIntOpaque:
392 case vmIntrinsics::_getLongOpaque:
393 case vmIntrinsics::_getFloatOpaque:
394 case vmIntrinsics::_getDoubleOpaque:
395 case vmIntrinsics::_putReferenceOpaque:
396 case vmIntrinsics::_putBooleanOpaque:
397 case vmIntrinsics::_putByteOpaque:
398 case vmIntrinsics::_putShortOpaque:
399 case vmIntrinsics::_putCharOpaque:
400 case vmIntrinsics::_putIntOpaque:
401 case vmIntrinsics::_putLongOpaque:
402 case vmIntrinsics::_putFloatOpaque:
403 case vmIntrinsics::_putDoubleOpaque:
404 case vmIntrinsics::_getAndAddInt:
405 case vmIntrinsics::_getAndAddLong:
406 case vmIntrinsics::_getAndSetInt:
407 case vmIntrinsics::_getAndSetLong:
408 case vmIntrinsics::_getAndSetReference:
409 case vmIntrinsics::_loadFence:
410 case vmIntrinsics::_storeFence:
411 case vmIntrinsics::_fullFence:
412 case vmIntrinsics::_compareAndSetLong:
413 case vmIntrinsics::_weakCompareAndSetLong:
414 case vmIntrinsics::_weakCompareAndSetLongPlain:
415 case vmIntrinsics::_weakCompareAndSetLongAcquire:
416 case vmIntrinsics::_weakCompareAndSetLongRelease:
417 case vmIntrinsics::_compareAndSetInt:
418 case vmIntrinsics::_weakCompareAndSetInt:
419 case vmIntrinsics::_weakCompareAndSetIntPlain:
420 case vmIntrinsics::_weakCompareAndSetIntAcquire:
421 case vmIntrinsics::_weakCompareAndSetIntRelease:
422 case vmIntrinsics::_compareAndSetReference:
423 case vmIntrinsics::_weakCompareAndSetReference:
424 case vmIntrinsics::_weakCompareAndSetReferencePlain:
425 case vmIntrinsics::_weakCompareAndSetReferenceAcquire:
426 case vmIntrinsics::_weakCompareAndSetReferenceRelease:
427 case vmIntrinsics::_compareAndExchangeInt:
428 case vmIntrinsics::_compareAndExchangeIntAcquire:
429 case vmIntrinsics::_compareAndExchangeIntRelease:
430 case vmIntrinsics::_compareAndExchangeLong:
431 case vmIntrinsics::_compareAndExchangeLongAcquire:
432 case vmIntrinsics::_compareAndExchangeLongRelease:
433 case vmIntrinsics::_compareAndExchangeReference:
434 case vmIntrinsics::_compareAndExchangeReferenceAcquire:
435 case vmIntrinsics::_compareAndExchangeReferenceRelease:
436 case vmIntrinsics::_allocateInstance:
437 if (!InlineUnsafeOps) return true;
438 break;
439 case vmIntrinsics::_getShortUnaligned:
440 case vmIntrinsics::_getCharUnaligned:
441 case vmIntrinsics::_getIntUnaligned:
442 case vmIntrinsics::_getLongUnaligned:
443 case vmIntrinsics::_putShortUnaligned:
444 case vmIntrinsics::_putCharUnaligned:
445 case vmIntrinsics::_putIntUnaligned:
446 case vmIntrinsics::_putLongUnaligned:
447 if (!InlineUnsafeOps || !UseUnalignedAccesses) return true;
448 break;
449 case vmIntrinsics::_hashCode:
450 if (!InlineObjectHash) return true;
451 break;
452 case vmIntrinsics::_aescrypt_encryptBlock:
453 case vmIntrinsics::_aescrypt_decryptBlock:
454 if (!UseAESIntrinsics) return true;
455 break;
456 case vmIntrinsics::_cipherBlockChaining_encryptAESCrypt:
457 case vmIntrinsics::_cipherBlockChaining_decryptAESCrypt:
458 if (!UseAESIntrinsics) return true;
459 break;
460 case vmIntrinsics::_electronicCodeBook_encryptAESCrypt:
461 case vmIntrinsics::_electronicCodeBook_decryptAESCrypt:
462 if (!UseAESIntrinsics) return true;
463 break;
464 case vmIntrinsics::_counterMode_AESCrypt:
465 if (!UseAESCTRIntrinsics) return true;
466 break;
467 case vmIntrinsics::_galoisCounterMode_AESCrypt:
468 if (!UseAESIntrinsics) return true;
469 break;
470 case vmIntrinsics::_md5_implCompress:
471 if (!UseMD5Intrinsics) return true;
472 break;
473 case vmIntrinsics::_sha_implCompress:
474 if (!UseSHA1Intrinsics) return true;
475 break;
476 case vmIntrinsics::_sha2_implCompress:
477 if (!UseSHA256Intrinsics) return true;
478 break;
479 case vmIntrinsics::_sha5_implCompress:
480 if (!UseSHA512Intrinsics) return true;
481 break;
482 case vmIntrinsics::_sha3_implCompress:
483 if (!UseSHA3Intrinsics) return true;
484 break;
485 case vmIntrinsics::_digestBase_implCompressMB:
486 if (!(UseMD5Intrinsics || UseSHA1Intrinsics || UseSHA256Intrinsics || UseSHA512Intrinsics || UseSHA3Intrinsics)) return true;
487 break;
488 case vmIntrinsics::_ghash_processBlocks:
489 if (!UseGHASHIntrinsics) return true;
490 break;
491 case vmIntrinsics::_chacha20Block:
492 if (!UseChaCha20Intrinsics) return true;
493 break;
494 case vmIntrinsics::_base64_encodeBlock:
495 case vmIntrinsics::_base64_decodeBlock:
496 if (!UseBASE64Intrinsics) return true;
497 break;
498 case vmIntrinsics::_poly1305_processBlocks:
499 if (!UsePoly1305Intrinsics) return true;
500 break;
501 case vmIntrinsics::_intpoly_montgomeryMult_P256:
502 case vmIntrinsics::_intpoly_assign:
503 if (!UseIntPolyIntrinsics) return true;
504 break;
505 case vmIntrinsics::_updateBytesCRC32C:
506 case vmIntrinsics::_updateDirectByteBufferCRC32C:
507 if (!UseCRC32CIntrinsics) return true;
508 break;
509 case vmIntrinsics::_vectorizedMismatch:
510 if (!UseVectorizedMismatchIntrinsic) return true;
511 break;
512 case vmIntrinsics::_updateBytesAdler32:
513 case vmIntrinsics::_updateByteBufferAdler32:
514 if (!UseAdler32Intrinsics) return true;
515 break;
516 case vmIntrinsics::_copyMemory:
517 if (!InlineArrayCopy || !InlineUnsafeOps) return true;
518 break;
519 case vmIntrinsics::_setMemory:
520 if (!InlineUnsafeOps) return true;
521 break;
522 #ifdef COMPILER2
523 case vmIntrinsics::_clone:
524 case vmIntrinsics::_copyOf:
525 case vmIntrinsics::_copyOfRange:
526 // These intrinsics use both the objectcopy and the arraycopy
527 // intrinsic mechanism.
528 if (!InlineObjectCopy || !InlineArrayCopy) return true;
529 break;
530 case vmIntrinsics::_compareToL:
531 case vmIntrinsics::_compareToU:
532 case vmIntrinsics::_compareToLU:
533 case vmIntrinsics::_compareToUL:
534 if (!SpecialStringCompareTo) return true;
535 break;
536 case vmIntrinsics::_indexOfL:
537 case vmIntrinsics::_indexOfU:
538 case vmIntrinsics::_indexOfUL:
539 case vmIntrinsics::_indexOfIL:
540 case vmIntrinsics::_indexOfIU:
541 case vmIntrinsics::_indexOfIUL:
542 case vmIntrinsics::_indexOfU_char:
543 case vmIntrinsics::_indexOfL_char:
544 if (!SpecialStringIndexOf) return true;
545 break;
546 case vmIntrinsics::_equalsL:
547 if (!SpecialStringEquals) return true;
548 break;
549 case vmIntrinsics::_vectorizedHashCode:
550 if (!UseVectorizedHashCodeIntrinsic) return true;
551 break;
552 case vmIntrinsics::_equalsB:
553 case vmIntrinsics::_equalsC:
554 if (!SpecialArraysEquals) return true;
555 break;
556 case vmIntrinsics::_encodeISOArray:
557 case vmIntrinsics::_encodeAsciiArray:
558 case vmIntrinsics::_encodeByteISOArray:
559 if (!SpecialEncodeISOArray) return true;
560 break;
561 case vmIntrinsics::_getCallerClass:
562 if (!InlineReflectionGetCallerClass) return true;
563 break;
564 case vmIntrinsics::_multiplyToLen:
565 if (!UseMultiplyToLenIntrinsic) return true;
566 break;
567 case vmIntrinsics::_squareToLen:
568 if (!UseSquareToLenIntrinsic) return true;
569 break;
570 case vmIntrinsics::_mulAdd:
571 if (!UseMulAddIntrinsic) return true;
572 break;
573 case vmIntrinsics::_montgomeryMultiply:
574 if (!UseMontgomeryMultiplyIntrinsic) return true;
575 break;
576 case vmIntrinsics::_montgomerySquare:
577 if (!UseMontgomerySquareIntrinsic) return true;
578 break;
579 case vmIntrinsics::_bigIntegerRightShiftWorker:
580 case vmIntrinsics::_bigIntegerLeftShiftWorker:
581 break;
582 case vmIntrinsics::_addExactI:
583 case vmIntrinsics::_addExactL:
584 case vmIntrinsics::_decrementExactI:
585 case vmIntrinsics::_decrementExactL:
586 case vmIntrinsics::_incrementExactI:
587 case vmIntrinsics::_incrementExactL:
588 case vmIntrinsics::_multiplyExactI:
589 case vmIntrinsics::_multiplyExactL:
590 case vmIntrinsics::_negateExactI:
591 case vmIntrinsics::_negateExactL:
592 case vmIntrinsics::_subtractExactI:
593 case vmIntrinsics::_subtractExactL:
594 if (!UseMathExactIntrinsics || !InlineMathNatives) return true;
595 break;
596 case vmIntrinsics::_isDigit:
597 case vmIntrinsics::_isLowerCase:
598 case vmIntrinsics::_isUpperCase:
599 case vmIntrinsics::_isWhitespace:
600 if (!UseCharacterCompareIntrinsics) return true;
601 break;
602 case vmIntrinsics::_dcopySign:
603 case vmIntrinsics::_fcopySign:
604 if (!InlineMathNatives || !UseCopySignIntrinsic) return true;
605 break;
606 case vmIntrinsics::_dsignum:
607 case vmIntrinsics::_fsignum:
608 if (!InlineMathNatives || !UseSignumIntrinsic) return true;
609 break;
610 #endif // COMPILER2
611 default:
612 return false;
613 }
614
615 return false;
616 }
617
618 #define VM_INTRINSIC_INITIALIZE(id, klass, name, sig, flags) #id "\0"
619 static const char* vm_intrinsic_name_bodies =
620 VM_INTRINSICS_DO(VM_INTRINSIC_INITIALIZE,
621 VM_SYMBOL_IGNORE, VM_SYMBOL_IGNORE, VM_SYMBOL_IGNORE, VM_ALIAS_IGNORE);
622
623 static const char* vm_intrinsic_name_table[vmIntrinsics::number_of_intrinsics()];
624 static TriBoolArray<(size_t)vmIntrinsics::number_of_intrinsics(), int> vm_intrinsic_control_words;
625
626 void vmIntrinsics::init_vm_intrinsic_name_table() {
627 const char** nt = &vm_intrinsic_name_table[0];
628 char* string = (char*) &vm_intrinsic_name_bodies[0];
629
630 for (auto index : EnumRange<vmIntrinsicID>{}) {
631 nt[as_int(index)] = string;
632 string += strlen(string); // skip string body
633 string += 1; // skip trailing null
634 }
635 assert(!strcmp(nt[as_int(vmIntrinsics::_hashCode)], "_hashCode"), "lined up");
636 nt[as_int(vmIntrinsics::_none)] = "_none";
637 }
638
639 const char* vmIntrinsics::name_at(vmIntrinsics::ID id) {
640 const char** nt = &vm_intrinsic_name_table[0];
641 if (nt[as_int(_none)] == nullptr) {
642 init_vm_intrinsic_name_table();
643 }
644
645 if (id < ID_LIMIT)
646 return vm_intrinsic_name_table[as_int(id)];
647 else
648 return "(unknown intrinsic)";
649 }
650
651 vmIntrinsics::ID vmIntrinsics::find_id(const char* name) {
652 const char** nt = &vm_intrinsic_name_table[0];
653 if (nt[as_int(_none)] == nullptr) {
654 init_vm_intrinsic_name_table();
655 }
656
657 for (auto index : EnumRange<vmIntrinsicID>{}) {
658 if (0 == strcmp(name, nt[as_int(index)])) {
659 return index;
660 }
661 }
662
663 return _none;
664 }
665
666 bool vmIntrinsics::is_intrinsic_available(vmIntrinsics::ID id) {
667 return VM_Version::is_intrinsic_supported(id) && !is_disabled_by_flags(id);
668 }
669
670 bool vmIntrinsics::is_disabled_by_flags(vmIntrinsics::ID id) {
671 assert(id > _none && id < ID_LIMIT, "must be a VM intrinsic");
672
673 // not initialized yet, process Control/DisableIntrinsic
674 if (vm_intrinsic_control_words[as_int(_none)].is_default()) {
675 for (ControlIntrinsicIter iter(ControlIntrinsic); *iter != nullptr; ++iter) {
676 vmIntrinsics::ID id = vmIntrinsics::find_id(*iter);
677
678 if (id != vmIntrinsics::_none) {
679 vm_intrinsic_control_words[as_int(id)] = iter.is_enabled() && !disabled_by_jvm_flags(id);
680 }
681 }
682
683 // Order matters, DisableIntrinsic can overwrite ControlIntrinsic
684 for (ControlIntrinsicIter iter(DisableIntrinsic, true/*disable_all*/); *iter != nullptr; ++iter) {
685 vmIntrinsics::ID id = vmIntrinsics::find_id(*iter);
686
687 if (id != vmIntrinsics::_none) {
688 vm_intrinsic_control_words[as_int(id)] = false;
689 }
690 }
691
692 vm_intrinsic_control_words[as_int(_none)] = true;
693 }
694
695 TriBool b = vm_intrinsic_control_words[as_int(id)];
696 if (b.is_default()) {
697 // unknown yet, query and cache it
698 b = vm_intrinsic_control_words[as_int(id)] = !disabled_by_jvm_flags(id);
699 }
700
701 return !b;
702 }
703
704 // These are for forming case labels:
705 #define ID3(x, y, z) (( jlong)(z) + \
706 ((jlong)(y) << vmSymbols::log2_SID_LIMIT) + \
707 ((jlong)(x) << (2*vmSymbols::log2_SID_LIMIT)) )
708 #define SID_ENUM(n) VM_SYMBOL_ENUM_NAME(n)
709
710 vmIntrinsics::ID vmIntrinsics::find_id_impl(vmSymbolID holder,
711 vmSymbolID name,
712 vmSymbolID sig,
713 jshort flags) {
714 assert((int)vmSymbolID::SID_LIMIT <= (1<<vmSymbols::log2_SID_LIMIT), "must fit");
715
716 // Let the C compiler build the decision tree.
717
718 #define VM_INTRINSIC_CASE(id, klass, name, sig, fcode) \
719 case ID3(SID_ENUM(klass), SID_ENUM(name), SID_ENUM(sig)): \
720 if (!match_##fcode(flags)) break; \
721 return id;
722
723 switch (ID3(holder, name, sig)) {
724 VM_INTRINSICS_DO(VM_INTRINSIC_CASE,
725 VM_SYMBOL_IGNORE, VM_SYMBOL_IGNORE, VM_SYMBOL_IGNORE, VM_ALIAS_IGNORE);
726 }
727 return vmIntrinsics::_none;
728
729 #undef VM_INTRINSIC_CASE
730 }
731
732 class vmIntrinsicsLookup {
733 bool _class_map[vmSymbols::number_of_symbols()];
734
735 constexpr int as_index(vmSymbolID id) const {
736 int index = vmSymbols::as_int(id);
737 assert(0 <= index && index < int(sizeof(_class_map)), "must be");
738 return index;
739 }
740
741 constexpr void set_class_map(vmSymbolID id) {
742 _class_map[as_index(id)] = true;
743 }
744
745 public:
746 constexpr vmIntrinsicsLookup() : _class_map() {
747
748 #define VM_INTRINSIC_CLASS_MAP(id, klass, name, sig, fcode) \
749 set_class_map(SID_ENUM(klass));
750
751 VM_INTRINSICS_DO(VM_INTRINSIC_CLASS_MAP,
752 VM_SYMBOL_IGNORE, VM_SYMBOL_IGNORE, VM_SYMBOL_IGNORE, VM_ALIAS_IGNORE);
753 #undef VM_INTRINSIC_CLASS_MAP
754
755
756 // A few slightly irregular cases. See Method::init_intrinsic_id
757 set_class_map(SID_ENUM(java_lang_StrictMath));
758 set_class_map(SID_ENUM(java_lang_invoke_MethodHandle));
759 set_class_map(SID_ENUM(java_lang_invoke_VarHandle));
760 }
761
762 bool class_has_intrinsics(vmSymbolID holder) const {
763 return _class_map[as_index(holder)];
764 }
765 };
766
767 constexpr vmIntrinsicsLookup _intrinsics_lookup;
768
769 bool vmIntrinsics::class_has_intrinsics(vmSymbolID holder) {
770 return _intrinsics_lookup.class_has_intrinsics(holder);
771 }
772
773 const char* vmIntrinsics::short_name_as_C_string(vmIntrinsics::ID id, char* buf, int buflen) {
774 const char* str = name_at(id);
775 #ifndef PRODUCT
776 const char* kname = vmSymbols::name_for(class_for(id));
777 const char* mname = vmSymbols::name_for(name_for(id));
778 const char* sname = vmSymbols::name_for(signature_for(id));
779 const char* fname = "";
780 switch (flags_for(id)) {
781 case F_Y: fname = "synchronized "; break;
782 case F_RN: fname = "native "; break;
783 case F_SN: fname = "native static "; break;
784 case F_S: fname = "static "; break;
785 default: break;
786 }
787 const char* kptr = strrchr(kname, JVM_SIGNATURE_SLASH);
788 if (kptr != nullptr) kname = kptr + 1;
789 int len = jio_snprintf(buf, buflen, "%s: %s%s.%s%s",
790 str, fname, kname, mname, sname);
791 if (len < buflen)
792 str = buf;
793 #endif //PRODUCT
794 return str;
795 }
796
797
798 // These are to get information about intrinsics.
799
800 #define ID4(x, y, z, f) ((ID3(x, y, z) << vmIntrinsics::log2_FLAG_LIMIT) | (jlong) (f))
801
802 #ifndef PRODUCT
803 static const jlong intrinsic_info_array[vmIntrinsics::number_of_intrinsics()+1] = {
804 #define VM_INTRINSIC_INFO(ignore_id, klass, name, sig, fcode) \
805 ID4(SID_ENUM(klass), SID_ENUM(name), SID_ENUM(sig), vmIntrinsics::fcode),
806
807 0, VM_INTRINSICS_DO(VM_INTRINSIC_INFO,
808 VM_SYMBOL_IGNORE, VM_SYMBOL_IGNORE, VM_SYMBOL_IGNORE, VM_ALIAS_IGNORE)
809 0
810 #undef VM_INTRINSIC_INFO
811 };
812
813 inline jlong intrinsic_info(vmIntrinsics::ID id) {
814 return intrinsic_info_array[vmIntrinsics::as_int(id)];
815 }
816
817 vmSymbolID vmIntrinsics::class_for(vmIntrinsics::ID id) {
818 jlong info = intrinsic_info(id);
819 int shift = 2*vmSymbols::log2_SID_LIMIT + log2_FLAG_LIMIT, mask = right_n_bits(vmSymbols::log2_SID_LIMIT);
820 assert(((ID4(1021,1022,1023,7) >> shift) & mask) == 1021, "");
821 return vmSymbols::as_SID( checked_cast<int>((info >> shift) & mask));
822 }
823
824 vmSymbolID vmIntrinsics::name_for(vmIntrinsics::ID id) {
825 jlong info = intrinsic_info(id);
826 int shift = vmSymbols::log2_SID_LIMIT + log2_FLAG_LIMIT, mask = right_n_bits(vmSymbols::log2_SID_LIMIT);
827 assert(((ID4(1021,1022,1023,7) >> shift) & mask) == 1022, "");
828 return vmSymbols::as_SID( checked_cast<int>((info >> shift) & mask));
829 }
830
831 vmSymbolID vmIntrinsics::signature_for(vmIntrinsics::ID id) {
832 jlong info = intrinsic_info(id);
833 int shift = log2_FLAG_LIMIT, mask = right_n_bits(vmSymbols::log2_SID_LIMIT);
834 assert(((ID4(1021,1022,1023,7) >> shift) & mask) == 1023, "");
835 return vmSymbols::as_SID( checked_cast<int>((info >> shift) & mask));
836 }
837
838 vmIntrinsics::Flags vmIntrinsics::flags_for(vmIntrinsics::ID id) {
839 jlong info = intrinsic_info(id);
840 int shift = 0, mask = right_n_bits(log2_FLAG_LIMIT);
841 assert(((ID4(1021,1022,1023,7) >> shift) & mask) == 7, "");
842 return Flags( (info >> shift) & mask );
843 }
844 #endif // !PRODUCT