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::_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::_equalsC:
226 case vmIntrinsics::_vectorizedHashCode:
227 case vmIntrinsics::_getCharStringU:
228 case vmIntrinsics::_putCharStringU:
229 case vmIntrinsics::_compressStringC:
230 case vmIntrinsics::_compressStringB:
231 case vmIntrinsics::_inflateStringC:
232 case vmIntrinsics::_inflateStringB:
233 case vmIntrinsics::_getAndAddInt:
234 case vmIntrinsics::_getAndAddLong:
235 case vmIntrinsics::_getAndSetInt:
236 case vmIntrinsics::_getAndSetLong:
237 case vmIntrinsics::_getAndSetReference:
238 case vmIntrinsics::_loadFence:
239 case vmIntrinsics::_storeFence:
240 case vmIntrinsics::_fullFence:
241 case vmIntrinsics::_countPositives:
242 case vmIntrinsics::_Reference_get:
243 case vmIntrinsics::_Continuation_doYield:
244 case vmIntrinsics::_Continuation_enterSpecial:
245 case vmIntrinsics::_Continuation_pin:
246 case vmIntrinsics::_Continuation_unpin:
247 break;
248 default:
249 return true;
250 }
251 }
252
253 switch (id) {
254 case vmIntrinsics::_isInstance:
255 case vmIntrinsics::_isAssignableFrom:
256 case vmIntrinsics::_getModifiers:
257 case vmIntrinsics::_isInterface:
258 case vmIntrinsics::_isArray:
259 case vmIntrinsics::_isPrimitive:
260 case vmIntrinsics::_isHidden:
261 case vmIntrinsics::_getSuperclass:
262 case vmIntrinsics::_Class_cast:
263 case vmIntrinsics::_getLength:
264 case vmIntrinsics::_newArray:
265 case vmIntrinsics::_newNullRestrictedArray:
266 case vmIntrinsics::_getClass:
267 if (!InlineClassNatives) return true;
268 break;
269 case vmIntrinsics::_currentCarrierThread:
270 case vmIntrinsics::_currentThread:
271 if (!InlineThreadNatives) return true;
272 break;
273 case vmIntrinsics::_setCurrentThread:
274 case vmIntrinsics::_scopedValueCache:
275 case vmIntrinsics::_setScopedValueCache:
276 case vmIntrinsics::_floatToRawIntBits:
277 case vmIntrinsics::_intBitsToFloat:
278 case vmIntrinsics::_doubleToRawLongBits:
279 case vmIntrinsics::_longBitsToDouble:
280 case vmIntrinsics::_ceil:
281 case vmIntrinsics::_floor:
282 case vmIntrinsics::_rint:
283 case vmIntrinsics::_dabs:
284 case vmIntrinsics::_fabs:
285 case vmIntrinsics::_iabs:
286 case vmIntrinsics::_labs:
287 case vmIntrinsics::_dsqrt:
288 case vmIntrinsics::_dsqrt_strict:
289 case vmIntrinsics::_dsin:
290 case vmIntrinsics::_dcos:
291 case vmIntrinsics::_dtan:
292 case vmIntrinsics::_dlog:
293 case vmIntrinsics::_dexp:
294 case vmIntrinsics::_dpow:
295 case vmIntrinsics::_dlog10:
296 case vmIntrinsics::_datan2:
297 case vmIntrinsics::_floatToIntBits:
298 case vmIntrinsics::_doubleToLongBits:
299 case vmIntrinsics::_min:
300 case vmIntrinsics::_max:
301 case vmIntrinsics::_maxF:
302 case vmIntrinsics::_minF:
303 case vmIntrinsics::_maxD:
304 case vmIntrinsics::_minD:
305 case vmIntrinsics::_min_strict:
306 case vmIntrinsics::_max_strict:
307 case vmIntrinsics::_maxF_strict:
308 case vmIntrinsics::_minF_strict:
309 case vmIntrinsics::_maxD_strict:
310 case vmIntrinsics::_minD_strict:
311 if (!InlineMathNatives) return true;
312 break;
313 case vmIntrinsics::_fmaD:
314 case vmIntrinsics::_fmaF:
315 if (!InlineMathNatives || !UseFMA) return true;
316 break;
317 case vmIntrinsics::_floatToFloat16:
318 case vmIntrinsics::_float16ToFloat:
319 if (!InlineIntrinsics) return true;
320 break;
321 case vmIntrinsics::_arraycopy:
322 if (!InlineArrayCopy) return true;
323 break;
324 case vmIntrinsics::_updateCRC32:
325 case vmIntrinsics::_updateBytesCRC32:
326 case vmIntrinsics::_updateByteBufferCRC32:
327 if (!UseCRC32Intrinsics) return true;
328 break;
329 case vmIntrinsics::_makePrivateBuffer:
330 case vmIntrinsics::_finishPrivateBuffer:
331 case vmIntrinsics::_getReference:
332 case vmIntrinsics::_getBoolean:
333 case vmIntrinsics::_getByte:
334 case vmIntrinsics::_getShort:
335 case vmIntrinsics::_getChar:
336 case vmIntrinsics::_getInt:
337 case vmIntrinsics::_getLong:
338 case vmIntrinsics::_getFloat:
339 case vmIntrinsics::_getDouble:
340 case vmIntrinsics::_getValue:
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::_putValue:
351 case vmIntrinsics::_getReferenceVolatile:
352 case vmIntrinsics::_getBooleanVolatile:
353 case vmIntrinsics::_getByteVolatile:
354 case vmIntrinsics::_getShortVolatile:
355 case vmIntrinsics::_getCharVolatile:
356 case vmIntrinsics::_getIntVolatile:
357 case vmIntrinsics::_getLongVolatile:
358 case vmIntrinsics::_getFloatVolatile:
359 case vmIntrinsics::_getDoubleVolatile:
360 case vmIntrinsics::_putReferenceVolatile:
361 case vmIntrinsics::_putBooleanVolatile:
362 case vmIntrinsics::_putByteVolatile:
363 case vmIntrinsics::_putShortVolatile:
364 case vmIntrinsics::_putCharVolatile:
365 case vmIntrinsics::_putIntVolatile:
366 case vmIntrinsics::_putLongVolatile:
367 case vmIntrinsics::_putFloatVolatile:
368 case vmIntrinsics::_putDoubleVolatile:
369 case vmIntrinsics::_getReferenceAcquire:
370 case vmIntrinsics::_getBooleanAcquire:
371 case vmIntrinsics::_getByteAcquire:
372 case vmIntrinsics::_getShortAcquire:
373 case vmIntrinsics::_getCharAcquire:
374 case vmIntrinsics::_getIntAcquire:
375 case vmIntrinsics::_getLongAcquire:
376 case vmIntrinsics::_getFloatAcquire:
377 case vmIntrinsics::_getDoubleAcquire:
378 case vmIntrinsics::_putReferenceRelease:
379 case vmIntrinsics::_putBooleanRelease:
380 case vmIntrinsics::_putByteRelease:
381 case vmIntrinsics::_putShortRelease:
382 case vmIntrinsics::_putCharRelease:
383 case vmIntrinsics::_putIntRelease:
384 case vmIntrinsics::_putLongRelease:
385 case vmIntrinsics::_putFloatRelease:
386 case vmIntrinsics::_putDoubleRelease:
387 case vmIntrinsics::_getReferenceOpaque:
388 case vmIntrinsics::_getBooleanOpaque:
389 case vmIntrinsics::_getByteOpaque:
390 case vmIntrinsics::_getShortOpaque:
391 case vmIntrinsics::_getCharOpaque:
392 case vmIntrinsics::_getIntOpaque:
393 case vmIntrinsics::_getLongOpaque:
394 case vmIntrinsics::_getFloatOpaque:
395 case vmIntrinsics::_getDoubleOpaque:
396 case vmIntrinsics::_putReferenceOpaque:
397 case vmIntrinsics::_putBooleanOpaque:
398 case vmIntrinsics::_putByteOpaque:
399 case vmIntrinsics::_putShortOpaque:
400 case vmIntrinsics::_putCharOpaque:
401 case vmIntrinsics::_putIntOpaque:
402 case vmIntrinsics::_putLongOpaque:
403 case vmIntrinsics::_putFloatOpaque:
404 case vmIntrinsics::_putDoubleOpaque:
405 case vmIntrinsics::_getAndAddInt:
406 case vmIntrinsics::_getAndAddLong:
407 case vmIntrinsics::_getAndSetInt:
408 case vmIntrinsics::_getAndSetLong:
409 case vmIntrinsics::_getAndSetReference:
410 case vmIntrinsics::_loadFence:
411 case vmIntrinsics::_storeFence:
412 case vmIntrinsics::_fullFence:
413 case vmIntrinsics::_compareAndSetLong:
414 case vmIntrinsics::_weakCompareAndSetLong:
415 case vmIntrinsics::_weakCompareAndSetLongPlain:
416 case vmIntrinsics::_weakCompareAndSetLongAcquire:
417 case vmIntrinsics::_weakCompareAndSetLongRelease:
418 case vmIntrinsics::_compareAndSetInt:
419 case vmIntrinsics::_weakCompareAndSetInt:
420 case vmIntrinsics::_weakCompareAndSetIntPlain:
421 case vmIntrinsics::_weakCompareAndSetIntAcquire:
422 case vmIntrinsics::_weakCompareAndSetIntRelease:
423 case vmIntrinsics::_compareAndSetReference:
424 case vmIntrinsics::_weakCompareAndSetReference:
425 case vmIntrinsics::_weakCompareAndSetReferencePlain:
426 case vmIntrinsics::_weakCompareAndSetReferenceAcquire:
427 case vmIntrinsics::_weakCompareAndSetReferenceRelease:
428 case vmIntrinsics::_compareAndExchangeInt:
429 case vmIntrinsics::_compareAndExchangeIntAcquire:
430 case vmIntrinsics::_compareAndExchangeIntRelease:
431 case vmIntrinsics::_compareAndExchangeLong:
432 case vmIntrinsics::_compareAndExchangeLongAcquire:
433 case vmIntrinsics::_compareAndExchangeLongRelease:
434 case vmIntrinsics::_compareAndExchangeReference:
435 case vmIntrinsics::_compareAndExchangeReferenceAcquire:
436 case vmIntrinsics::_compareAndExchangeReferenceRelease:
437 case vmIntrinsics::_allocateInstance:
438 if (!InlineUnsafeOps) return true;
439 break;
440 case vmIntrinsics::_getShortUnaligned:
441 case vmIntrinsics::_getCharUnaligned:
442 case vmIntrinsics::_getIntUnaligned:
443 case vmIntrinsics::_getLongUnaligned:
444 case vmIntrinsics::_putShortUnaligned:
445 case vmIntrinsics::_putCharUnaligned:
446 case vmIntrinsics::_putIntUnaligned:
447 case vmIntrinsics::_putLongUnaligned:
448 if (!InlineUnsafeOps || !UseUnalignedAccesses) return true;
449 break;
450 case vmIntrinsics::_hashCode:
451 if (!InlineObjectHash) return true;
452 break;
453 case vmIntrinsics::_aescrypt_encryptBlock:
454 case vmIntrinsics::_aescrypt_decryptBlock:
455 if (!UseAESIntrinsics) return true;
456 break;
457 case vmIntrinsics::_cipherBlockChaining_encryptAESCrypt:
458 case vmIntrinsics::_cipherBlockChaining_decryptAESCrypt:
459 if (!UseAESIntrinsics) return true;
460 break;
461 case vmIntrinsics::_electronicCodeBook_encryptAESCrypt:
462 case vmIntrinsics::_electronicCodeBook_decryptAESCrypt:
463 if (!UseAESIntrinsics) return true;
464 break;
465 case vmIntrinsics::_counterMode_AESCrypt:
466 if (!UseAESCTRIntrinsics) return true;
467 break;
468 case vmIntrinsics::_galoisCounterMode_AESCrypt:
469 if (!UseAESIntrinsics) return true;
470 break;
471 case vmIntrinsics::_md5_implCompress:
472 if (!UseMD5Intrinsics) return true;
473 break;
474 case vmIntrinsics::_sha_implCompress:
475 if (!UseSHA1Intrinsics) return true;
476 break;
477 case vmIntrinsics::_sha2_implCompress:
478 if (!UseSHA256Intrinsics) return true;
479 break;
480 case vmIntrinsics::_sha5_implCompress:
481 if (!UseSHA512Intrinsics) return true;
482 break;
483 case vmIntrinsics::_sha3_implCompress:
484 if (!UseSHA3Intrinsics) return true;
485 break;
486 case vmIntrinsics::_digestBase_implCompressMB:
487 if (!(UseMD5Intrinsics || UseSHA1Intrinsics || UseSHA256Intrinsics || UseSHA512Intrinsics || UseSHA3Intrinsics)) return true;
488 break;
489 case vmIntrinsics::_ghash_processBlocks:
490 if (!UseGHASHIntrinsics) return true;
491 break;
492 case vmIntrinsics::_chacha20Block:
493 if (!UseChaCha20Intrinsics) return true;
494 break;
495 case vmIntrinsics::_base64_encodeBlock:
496 case vmIntrinsics::_base64_decodeBlock:
497 if (!UseBASE64Intrinsics) return true;
498 break;
499 case vmIntrinsics::_poly1305_processBlocks:
500 if (!UsePoly1305Intrinsics) return true;
501 break;
502 case vmIntrinsics::_intpoly_montgomeryMult_P256:
503 case vmIntrinsics::_intpoly_assign:
504 if (!UseIntPolyIntrinsics) return true;
505 break;
506 case vmIntrinsics::_updateBytesCRC32C:
507 case vmIntrinsics::_updateDirectByteBufferCRC32C:
508 if (!UseCRC32CIntrinsics) return true;
509 break;
510 case vmIntrinsics::_vectorizedMismatch:
511 if (!UseVectorizedMismatchIntrinsic) return true;
512 break;
513 case vmIntrinsics::_updateBytesAdler32:
514 case vmIntrinsics::_updateByteBufferAdler32:
515 if (!UseAdler32Intrinsics) return true;
516 break;
517 case vmIntrinsics::_copyMemory:
518 if (!InlineArrayCopy || !InlineUnsafeOps) return true;
519 break;
520 case vmIntrinsics::_setMemory:
521 if (!InlineUnsafeOps) return true;
522 break;
523 #ifdef COMPILER2
524 case vmIntrinsics::_clone:
525 case vmIntrinsics::_copyOf:
526 case vmIntrinsics::_copyOfRange:
527 // These intrinsics use both the objectcopy and the arraycopy
528 // intrinsic mechanism.
529 if (!InlineObjectCopy || !InlineArrayCopy) return true;
530 break;
531 case vmIntrinsics::_compareToL:
532 case vmIntrinsics::_compareToU:
533 case vmIntrinsics::_compareToLU:
534 case vmIntrinsics::_compareToUL:
535 if (!SpecialStringCompareTo) return true;
536 break;
537 case vmIntrinsics::_indexOfL:
538 case vmIntrinsics::_indexOfU:
539 case vmIntrinsics::_indexOfUL:
540 case vmIntrinsics::_indexOfIL:
541 case vmIntrinsics::_indexOfIU:
542 case vmIntrinsics::_indexOfIUL:
543 case vmIntrinsics::_indexOfU_char:
544 case vmIntrinsics::_indexOfL_char:
545 if (!SpecialStringIndexOf) return true;
546 break;
547 case vmIntrinsics::_equalsL:
548 if (!SpecialStringEquals) return true;
549 break;
550 case vmIntrinsics::_vectorizedHashCode:
551 if (!UseVectorizedHashCodeIntrinsic) return true;
552 break;
553 case vmIntrinsics::_equalsB:
554 case vmIntrinsics::_equalsC:
555 if (!SpecialArraysEquals) return true;
556 break;
557 case vmIntrinsics::_encodeISOArray:
558 case vmIntrinsics::_encodeAsciiArray:
559 case vmIntrinsics::_encodeByteISOArray:
560 if (!SpecialEncodeISOArray) return true;
561 break;
562 case vmIntrinsics::_getCallerClass:
563 if (!InlineReflectionGetCallerClass) return true;
564 break;
565 case vmIntrinsics::_multiplyToLen:
566 if (!UseMultiplyToLenIntrinsic) return true;
567 break;
568 case vmIntrinsics::_squareToLen:
569 if (!UseSquareToLenIntrinsic) return true;
570 break;
571 case vmIntrinsics::_mulAdd:
572 if (!UseMulAddIntrinsic) return true;
573 break;
574 case vmIntrinsics::_montgomeryMultiply:
575 if (!UseMontgomeryMultiplyIntrinsic) return true;
576 break;
577 case vmIntrinsics::_montgomerySquare:
578 if (!UseMontgomerySquareIntrinsic) return true;
579 break;
580 case vmIntrinsics::_bigIntegerRightShiftWorker:
581 case vmIntrinsics::_bigIntegerLeftShiftWorker:
582 break;
583 case vmIntrinsics::_addExactI:
584 case vmIntrinsics::_addExactL:
585 case vmIntrinsics::_decrementExactI:
586 case vmIntrinsics::_decrementExactL:
587 case vmIntrinsics::_incrementExactI:
588 case vmIntrinsics::_incrementExactL:
589 case vmIntrinsics::_multiplyExactI:
590 case vmIntrinsics::_multiplyExactL:
591 case vmIntrinsics::_negateExactI:
592 case vmIntrinsics::_negateExactL:
593 case vmIntrinsics::_subtractExactI:
594 case vmIntrinsics::_subtractExactL:
595 if (!UseMathExactIntrinsics || !InlineMathNatives) return true;
596 break;
597 case vmIntrinsics::_isDigit:
598 case vmIntrinsics::_isLowerCase:
599 case vmIntrinsics::_isUpperCase:
600 case vmIntrinsics::_isWhitespace:
601 if (!UseCharacterCompareIntrinsics) return true;
602 break;
603 case vmIntrinsics::_dcopySign:
604 case vmIntrinsics::_fcopySign:
605 if (!InlineMathNatives || !UseCopySignIntrinsic) return true;
606 break;
607 case vmIntrinsics::_dsignum:
608 case vmIntrinsics::_fsignum:
609 if (!InlineMathNatives || !UseSignumIntrinsic) return true;
610 break;
611 #endif // COMPILER2
612 default:
613 return false;
614 }
615
616 return false;
617 }
618
619 #define VM_INTRINSIC_INITIALIZE(id, klass, name, sig, flags) #id "\0"
620 static const char* vm_intrinsic_name_bodies =
621 VM_INTRINSICS_DO(VM_INTRINSIC_INITIALIZE,
622 VM_SYMBOL_IGNORE, VM_SYMBOL_IGNORE, VM_SYMBOL_IGNORE, VM_ALIAS_IGNORE);
623
624 static const char* vm_intrinsic_name_table[vmIntrinsics::number_of_intrinsics()];
625 static TriBoolArray<(size_t)vmIntrinsics::number_of_intrinsics(), int> vm_intrinsic_control_words;
626
627 void vmIntrinsics::init_vm_intrinsic_name_table() {
628 const char** nt = &vm_intrinsic_name_table[0];
629 char* string = (char*) &vm_intrinsic_name_bodies[0];
630
631 for (auto index : EnumRange<vmIntrinsicID>{}) {
632 nt[as_int(index)] = string;
633 string += strlen(string); // skip string body
634 string += 1; // skip trailing null
635 }
636 assert(!strcmp(nt[as_int(vmIntrinsics::_hashCode)], "_hashCode"), "lined up");
637 nt[as_int(vmIntrinsics::_none)] = "_none";
638 }
639
640 const char* vmIntrinsics::name_at(vmIntrinsics::ID id) {
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 if (id < ID_LIMIT)
647 return vm_intrinsic_name_table[as_int(id)];
648 else
649 return "(unknown intrinsic)";
650 }
651
652 vmIntrinsics::ID vmIntrinsics::find_id(const char* name) {
653 const char** nt = &vm_intrinsic_name_table[0];
654 if (nt[as_int(_none)] == nullptr) {
655 init_vm_intrinsic_name_table();
656 }
657
658 for (auto index : EnumRange<vmIntrinsicID>{}) {
659 if (0 == strcmp(name, nt[as_int(index)])) {
660 return index;
661 }
662 }
663
664 return _none;
665 }
666
667 bool vmIntrinsics::is_intrinsic_available(vmIntrinsics::ID id) {
668 return VM_Version::is_intrinsic_supported(id) && !is_disabled_by_flags(id);
669 }
670
671 bool vmIntrinsics::is_disabled_by_flags(vmIntrinsics::ID id) {
672 assert(id > _none && id < ID_LIMIT, "must be a VM intrinsic");
673
674 // not initialized yet, process Control/DisableIntrinsic
675 if (vm_intrinsic_control_words[as_int(_none)].is_default()) {
676 for (ControlIntrinsicIter iter(ControlIntrinsic); *iter != nullptr; ++iter) {
677 vmIntrinsics::ID id = vmIntrinsics::find_id(*iter);
678
679 if (id != vmIntrinsics::_none) {
680 vm_intrinsic_control_words[as_int(id)] = iter.is_enabled() && !disabled_by_jvm_flags(id);
681 }
682 }
683
684 // Order matters, DisableIntrinsic can overwrite ControlIntrinsic
685 for (ControlIntrinsicIter iter(DisableIntrinsic, true/*disable_all*/); *iter != nullptr; ++iter) {
686 vmIntrinsics::ID id = vmIntrinsics::find_id(*iter);
687
688 if (id != vmIntrinsics::_none) {
689 vm_intrinsic_control_words[as_int(id)] = false;
690 }
691 }
692
693 vm_intrinsic_control_words[as_int(_none)] = true;
694 }
695
696 TriBool b = vm_intrinsic_control_words[as_int(id)];
697 if (b.is_default()) {
698 // unknown yet, query and cache it
699 b = vm_intrinsic_control_words[as_int(id)] = !disabled_by_jvm_flags(id);
700 }
701
702 return !b;
703 }
704
705 // These are for forming case labels:
706 #define ID3(x, y, z) (( jlong)(z) + \
707 ((jlong)(y) << vmSymbols::log2_SID_LIMIT) + \
708 ((jlong)(x) << (2*vmSymbols::log2_SID_LIMIT)) )
709 #define SID_ENUM(n) VM_SYMBOL_ENUM_NAME(n)
710
711 vmIntrinsics::ID vmIntrinsics::find_id_impl(vmSymbolID holder,
712 vmSymbolID name,
713 vmSymbolID sig,
714 jshort flags) {
715 assert((int)vmSymbolID::SID_LIMIT <= (1<<vmSymbols::log2_SID_LIMIT), "must fit");
716
717 // Let the C compiler build the decision tree.
718
719 #define VM_INTRINSIC_CASE(id, klass, name, sig, fcode) \
720 case ID3(SID_ENUM(klass), SID_ENUM(name), SID_ENUM(sig)): \
721 if (!match_##fcode(flags)) break; \
722 return id;
723
724 switch (ID3(holder, name, sig)) {
725 VM_INTRINSICS_DO(VM_INTRINSIC_CASE,
726 VM_SYMBOL_IGNORE, VM_SYMBOL_IGNORE, VM_SYMBOL_IGNORE, VM_ALIAS_IGNORE);
727 }
728 return vmIntrinsics::_none;
729
730 #undef VM_INTRINSIC_CASE
731 }
732
733 class vmIntrinsicsLookup {
734 bool _class_map[vmSymbols::number_of_symbols()];
735
736 constexpr int as_index(vmSymbolID id) const {
737 int index = vmSymbols::as_int(id);
738 assert(0 <= index && index < int(sizeof(_class_map)), "must be");
739 return index;
740 }
741
742 constexpr void set_class_map(vmSymbolID id) {
743 _class_map[as_index(id)] = true;
744 }
745
746 public:
747 constexpr vmIntrinsicsLookup() : _class_map() {
748
749 #define VM_INTRINSIC_CLASS_MAP(id, klass, name, sig, fcode) \
750 set_class_map(SID_ENUM(klass));
751
752 VM_INTRINSICS_DO(VM_INTRINSIC_CLASS_MAP,
753 VM_SYMBOL_IGNORE, VM_SYMBOL_IGNORE, VM_SYMBOL_IGNORE, VM_ALIAS_IGNORE);
754 #undef VM_INTRINSIC_CLASS_MAP
755
756
757 // A few slightly irregular cases. See Method::init_intrinsic_id
758 set_class_map(SID_ENUM(java_lang_StrictMath));
759 set_class_map(SID_ENUM(java_lang_invoke_MethodHandle));
760 set_class_map(SID_ENUM(java_lang_invoke_VarHandle));
761 }
762
763 bool class_has_intrinsics(vmSymbolID holder) const {
764 return _class_map[as_index(holder)];
765 }
766 };
767
768 constexpr vmIntrinsicsLookup _intrinsics_lookup;
769
770 bool vmIntrinsics::class_has_intrinsics(vmSymbolID holder) {
771 return _intrinsics_lookup.class_has_intrinsics(holder);
772 }
773
774 const char* vmIntrinsics::short_name_as_C_string(vmIntrinsics::ID id, char* buf, int buflen) {
775 const char* str = name_at(id);
776 #ifndef PRODUCT
777 const char* kname = vmSymbols::name_for(class_for(id));
778 const char* mname = vmSymbols::name_for(name_for(id));
779 const char* sname = vmSymbols::name_for(signature_for(id));
780 const char* fname = "";
781 switch (flags_for(id)) {
782 case F_Y: fname = "synchronized "; break;
783 case F_RN: fname = "native "; break;
784 case F_SN: fname = "native static "; break;
785 case F_S: fname = "static "; break;
786 default: break;
787 }
788 const char* kptr = strrchr(kname, JVM_SIGNATURE_SLASH);
789 if (kptr != nullptr) kname = kptr + 1;
790 int len = jio_snprintf(buf, buflen, "%s: %s%s.%s%s",
791 str, fname, kname, mname, sname);
792 if (len < buflen)
793 str = buf;
794 #endif //PRODUCT
795 return str;
796 }
797
798
799 // These are to get information about intrinsics.
800
801 #define ID4(x, y, z, f) ((ID3(x, y, z) << vmIntrinsics::log2_FLAG_LIMIT) | (jlong) (f))
802
803 #ifndef PRODUCT
804 static const jlong intrinsic_info_array[vmIntrinsics::number_of_intrinsics()+1] = {
805 #define VM_INTRINSIC_INFO(ignore_id, klass, name, sig, fcode) \
806 ID4(SID_ENUM(klass), SID_ENUM(name), SID_ENUM(sig), vmIntrinsics::fcode),
807
808 0, VM_INTRINSICS_DO(VM_INTRINSIC_INFO,
809 VM_SYMBOL_IGNORE, VM_SYMBOL_IGNORE, VM_SYMBOL_IGNORE, VM_ALIAS_IGNORE)
810 0
811 #undef VM_INTRINSIC_INFO
812 };
813
814 inline jlong intrinsic_info(vmIntrinsics::ID id) {
815 return intrinsic_info_array[vmIntrinsics::as_int(id)];
816 }
817
818 vmSymbolID vmIntrinsics::class_for(vmIntrinsics::ID id) {
819 jlong info = intrinsic_info(id);
820 int shift = 2*vmSymbols::log2_SID_LIMIT + log2_FLAG_LIMIT, mask = right_n_bits(vmSymbols::log2_SID_LIMIT);
821 assert(((ID4(1021,1022,1023,7) >> shift) & mask) == 1021, "");
822 return vmSymbols::as_SID( checked_cast<int>((info >> shift) & mask));
823 }
824
825 vmSymbolID vmIntrinsics::name_for(vmIntrinsics::ID id) {
826 jlong info = intrinsic_info(id);
827 int shift = vmSymbols::log2_SID_LIMIT + log2_FLAG_LIMIT, mask = right_n_bits(vmSymbols::log2_SID_LIMIT);
828 assert(((ID4(1021,1022,1023,7) >> shift) & mask) == 1022, "");
829 return vmSymbols::as_SID( checked_cast<int>((info >> shift) & mask));
830 }
831
832 vmSymbolID vmIntrinsics::signature_for(vmIntrinsics::ID id) {
833 jlong info = intrinsic_info(id);
834 int shift = log2_FLAG_LIMIT, mask = right_n_bits(vmSymbols::log2_SID_LIMIT);
835 assert(((ID4(1021,1022,1023,7) >> shift) & mask) == 1023, "");
836 return vmSymbols::as_SID( checked_cast<int>((info >> shift) & mask));
837 }
838
839 vmIntrinsics::Flags vmIntrinsics::flags_for(vmIntrinsics::ID id) {
840 jlong info = intrinsic_info(id);
841 int shift = 0, mask = right_n_bits(log2_FLAG_LIMIT);
842 assert(((ID4(1021,1022,1023,7) >> shift) & mask) == 7, "");
843 return Flags( (info >> shift) & mask );
844 }
845 #endif // !PRODUCT