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