1 /*
2 * Copyright (c) 2020, 2021, 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 "jvm_constants.h"
27 #include "jvm_io.h"
28 #include "classfile/vmIntrinsics.hpp"
29 #include "classfile/vmSymbols.hpp"
30 #include "compiler/compilerDirectives.hpp"
31 #include "utilities/xmlstream.hpp"
32
33 // These are flag-matching functions:
34 inline bool match_F_R(jshort flags) {
35 const int req = 0;
36 const int neg = JVM_ACC_STATIC | JVM_ACC_SYNCHRONIZED;
37 return (flags & (req | neg)) == req;
38 }
39
40 inline bool match_F_Y(jshort flags) {
41 const int req = JVM_ACC_SYNCHRONIZED;
42 const int neg = JVM_ACC_STATIC;
43 return (flags & (req | neg)) == req;
44 }
45
46 inline bool match_F_RN(jshort flags) {
47 const int req = JVM_ACC_NATIVE;
48 const int neg = JVM_ACC_STATIC | JVM_ACC_SYNCHRONIZED;
49 return (flags & (req | neg)) == req;
50 }
51
52 inline bool match_F_S(jshort flags) {
53 const int req = JVM_ACC_STATIC;
54 const int neg = JVM_ACC_SYNCHRONIZED;
55 return (flags & (req | neg)) == req;
56 }
57
58 inline bool match_F_SN(jshort flags) {
59 const int req = JVM_ACC_STATIC | JVM_ACC_NATIVE;
60 const int neg = JVM_ACC_SYNCHRONIZED;
61 return (flags & (req | neg)) == req;
62 }
63
64 bool vmIntrinsics::preserves_state(vmIntrinsics::ID id) {
65 assert(id != vmIntrinsics::_none, "must be a VM intrinsic");
66 switch(id) {
67 #ifdef JFR_HAVE_INTRINSICS
68 case vmIntrinsics::_counterTime:
69 #endif
70 case vmIntrinsics::_currentTimeMillis:
71 case vmIntrinsics::_nanoTime:
72 case vmIntrinsics::_floatToRawIntBits:
73 case vmIntrinsics::_intBitsToFloat:
74 case vmIntrinsics::_doubleToRawLongBits:
75 case vmIntrinsics::_longBitsToDouble:
76 case vmIntrinsics::_getClass:
77 case vmIntrinsics::_isInstance:
78 case vmIntrinsics::_currentThread:
79 case vmIntrinsics::_dabs:
80 case vmIntrinsics::_fabs:
81 case vmIntrinsics::_iabs:
82 case vmIntrinsics::_labs:
83 case vmIntrinsics::_dsqrt:
84 case vmIntrinsics::_dsin:
85 case vmIntrinsics::_dcos:
86 case vmIntrinsics::_dtan:
87 case vmIntrinsics::_dlog:
88 case vmIntrinsics::_dlog10:
89 case vmIntrinsics::_dexp:
90 case vmIntrinsics::_dpow:
91 case vmIntrinsics::_Preconditions_checkIndex:
92 case vmIntrinsics::_Preconditions_checkLongIndex:
93 case vmIntrinsics::_Reference_get:
94 case vmIntrinsics::_updateCRC32:
95 case vmIntrinsics::_updateBytesCRC32:
96 case vmIntrinsics::_updateByteBufferCRC32:
97 case vmIntrinsics::_updateBytesAdler32:
98 case vmIntrinsics::_vectorizedMismatch:
99 case vmIntrinsics::_fmaD:
100 case vmIntrinsics::_fmaF:
101 case vmIntrinsics::_isDigit:
102 case vmIntrinsics::_isLowerCase:
103 case vmIntrinsics::_isUpperCase:
104 case vmIntrinsics::_isWhitespace:
105 return true;
106 default:
107 return false;
108 }
109 }
110
111 bool vmIntrinsics::can_trap(vmIntrinsics::ID id) {
112 assert(id != vmIntrinsics::_none, "must be a VM intrinsic");
113 switch(id) {
114 #ifdef JFR_HAVE_INTRINSICS
115 case vmIntrinsics::_counterTime:
116 case vmIntrinsics::_getClassId:
117 #endif
118 case vmIntrinsics::_currentTimeMillis:
119 case vmIntrinsics::_nanoTime:
120 case vmIntrinsics::_floatToRawIntBits:
121 case vmIntrinsics::_intBitsToFloat:
122 case vmIntrinsics::_doubleToRawLongBits:
123 case vmIntrinsics::_longBitsToDouble:
124 case vmIntrinsics::_currentThread:
125 case vmIntrinsics::_dabs:
126 case vmIntrinsics::_fabs:
127 case vmIntrinsics::_iabs:
128 case vmIntrinsics::_labs:
129 case vmIntrinsics::_dsqrt:
130 case vmIntrinsics::_dsin:
131 case vmIntrinsics::_dcos:
132 case vmIntrinsics::_dtan:
133 case vmIntrinsics::_dlog:
134 case vmIntrinsics::_dlog10:
135 case vmIntrinsics::_dexp:
136 case vmIntrinsics::_dpow:
137 case vmIntrinsics::_updateCRC32:
138 case vmIntrinsics::_updateBytesCRC32:
139 case vmIntrinsics::_updateByteBufferCRC32:
140 case vmIntrinsics::_vectorizedMismatch:
141 case vmIntrinsics::_fmaD:
142 case vmIntrinsics::_fmaF:
143 return false;
144 default:
145 return true;
146 }
147 }
148
149 // Some intrinsics produce different results if they are not pinned
150 bool vmIntrinsics::should_be_pinned(vmIntrinsics::ID id) {
151 assert(id != vmIntrinsics::_none, "must be a VM intrinsic");
152 switch(id) {
153 #ifdef JFR_HAVE_INTRINSICS
154 case vmIntrinsics::_counterTime:
155 #endif
156 case vmIntrinsics::_currentTimeMillis:
157 case vmIntrinsics::_nanoTime:
158 case vmIntrinsics::_blackhole:
159 return true;
160 default:
161 return false;
162 }
163 }
164
165 bool vmIntrinsics::does_virtual_dispatch(vmIntrinsics::ID id) {
166 assert(id != vmIntrinsics::_none, "must be a VM intrinsic");
167 switch(id) {
168 case vmIntrinsics::_hashCode:
169 case vmIntrinsics::_clone:
170 return true;
171 break;
172 default:
173 return false;
174 }
175 }
176
177 int vmIntrinsics::predicates_needed(vmIntrinsics::ID id) {
178 assert(id != vmIntrinsics::_none, "must be a VM intrinsic");
179 switch (id) {
180 case vmIntrinsics::_cipherBlockChaining_encryptAESCrypt:
181 case vmIntrinsics::_cipherBlockChaining_decryptAESCrypt:
182 case vmIntrinsics::_electronicCodeBook_encryptAESCrypt:
183 case vmIntrinsics::_electronicCodeBook_decryptAESCrypt:
184 case vmIntrinsics::_counterMode_AESCrypt:
185 case vmIntrinsics::_galoisCounterMode_AESCrypt:
186 return 1;
187 case vmIntrinsics::_digestBase_implCompressMB:
188 return 5;
189 default:
190 return 0;
191 }
192 }
193
194 bool vmIntrinsics::disabled_by_jvm_flags(vmIntrinsics::ID id) {
195 assert(id != vmIntrinsics::_none, "must be a VM intrinsic");
196
197 // -XX:-InlineNatives disables nearly all intrinsics except the ones listed in
198 // the following switch statement.
199 if (!InlineNatives) {
200 switch (id) {
201 case vmIntrinsics::_indexOfL:
202 case vmIntrinsics::_indexOfU:
203 case vmIntrinsics::_indexOfUL:
204 case vmIntrinsics::_indexOfIL:
205 case vmIntrinsics::_indexOfIU:
206 case vmIntrinsics::_indexOfIUL:
207 case vmIntrinsics::_indexOfU_char:
208 case vmIntrinsics::_indexOfL_char:
209 case vmIntrinsics::_compareToL:
210 case vmIntrinsics::_compareToU:
211 case vmIntrinsics::_compareToLU:
212 case vmIntrinsics::_compareToUL:
213 case vmIntrinsics::_equalsL:
214 case vmIntrinsics::_equalsU:
215 case vmIntrinsics::_equalsC:
216 case vmIntrinsics::_getCharStringU:
217 case vmIntrinsics::_putCharStringU:
218 case vmIntrinsics::_compressStringC:
219 case vmIntrinsics::_compressStringB:
220 case vmIntrinsics::_inflateStringC:
221 case vmIntrinsics::_inflateStringB:
222 case vmIntrinsics::_getAndAddInt:
223 case vmIntrinsics::_getAndAddLong:
224 case vmIntrinsics::_getAndSetInt:
225 case vmIntrinsics::_getAndSetLong:
226 case vmIntrinsics::_getAndSetReference:
227 case vmIntrinsics::_loadFence:
228 case vmIntrinsics::_storeFence:
229 case vmIntrinsics::_fullFence:
230 case vmIntrinsics::_hasNegatives:
231 case vmIntrinsics::_Reference_get:
232 break;
233 default:
234 return true;
235 }
236 }
237
238 switch (id) {
239 case vmIntrinsics::_asPrimaryType:
240 case vmIntrinsics::_asValueType:
241 case vmIntrinsics::_isInstance:
242 case vmIntrinsics::_isAssignableFrom:
243 case vmIntrinsics::_getModifiers:
244 case vmIntrinsics::_isInterface:
245 case vmIntrinsics::_isArray:
246 case vmIntrinsics::_isPrimitive:
247 case vmIntrinsics::_isHidden:
248 case vmIntrinsics::_getSuperclass:
249 case vmIntrinsics::_Class_cast:
250 case vmIntrinsics::_getLength:
251 case vmIntrinsics::_newArray:
252 case vmIntrinsics::_getClass:
253 if (!InlineClassNatives) return true;
254 break;
255 case vmIntrinsics::_currentThread:
256 if (!InlineThreadNatives) return true;
257 break;
258 case vmIntrinsics::_floatToRawIntBits:
259 case vmIntrinsics::_intBitsToFloat:
260 case vmIntrinsics::_doubleToRawLongBits:
261 case vmIntrinsics::_longBitsToDouble:
262 case vmIntrinsics::_ceil:
263 case vmIntrinsics::_floor:
264 case vmIntrinsics::_rint:
265 case vmIntrinsics::_dabs:
266 case vmIntrinsics::_fabs:
267 case vmIntrinsics::_iabs:
268 case vmIntrinsics::_labs:
269 case vmIntrinsics::_dsqrt:
270 case vmIntrinsics::_dsin:
271 case vmIntrinsics::_dcos:
272 case vmIntrinsics::_dtan:
273 case vmIntrinsics::_dlog:
274 case vmIntrinsics::_dexp:
275 case vmIntrinsics::_dpow:
276 case vmIntrinsics::_dlog10:
277 case vmIntrinsics::_datan2:
278 case vmIntrinsics::_min:
279 case vmIntrinsics::_max:
280 case vmIntrinsics::_floatToIntBits:
281 case vmIntrinsics::_doubleToLongBits:
282 case vmIntrinsics::_maxF:
283 case vmIntrinsics::_minF:
284 case vmIntrinsics::_maxD:
285 case vmIntrinsics::_minD:
286 if (!InlineMathNatives) return true;
287 break;
288 case vmIntrinsics::_fmaD:
289 case vmIntrinsics::_fmaF:
290 if (!InlineMathNatives || !UseFMA) return true;
291 break;
292 case vmIntrinsics::_arraycopy:
293 if (!InlineArrayCopy) return true;
294 break;
295 case vmIntrinsics::_updateCRC32:
296 case vmIntrinsics::_updateBytesCRC32:
297 case vmIntrinsics::_updateByteBufferCRC32:
298 if (!UseCRC32Intrinsics) return true;
299 break;
300 case vmIntrinsics::_makePrivateBuffer:
301 case vmIntrinsics::_finishPrivateBuffer:
302 case vmIntrinsics::_getReference:
303 case vmIntrinsics::_getBoolean:
304 case vmIntrinsics::_getByte:
305 case vmIntrinsics::_getShort:
306 case vmIntrinsics::_getChar:
307 case vmIntrinsics::_getInt:
308 case vmIntrinsics::_getLong:
309 case vmIntrinsics::_getFloat:
310 case vmIntrinsics::_getDouble:
311 case vmIntrinsics::_getValue:
312 case vmIntrinsics::_putReference:
313 case vmIntrinsics::_putBoolean:
314 case vmIntrinsics::_putByte:
315 case vmIntrinsics::_putShort:
316 case vmIntrinsics::_putChar:
317 case vmIntrinsics::_putInt:
318 case vmIntrinsics::_putLong:
319 case vmIntrinsics::_putFloat:
320 case vmIntrinsics::_putDouble:
321 case vmIntrinsics::_putValue:
322 case vmIntrinsics::_getReferenceVolatile:
323 case vmIntrinsics::_getBooleanVolatile:
324 case vmIntrinsics::_getByteVolatile:
325 case vmIntrinsics::_getShortVolatile:
326 case vmIntrinsics::_getCharVolatile:
327 case vmIntrinsics::_getIntVolatile:
328 case vmIntrinsics::_getLongVolatile:
329 case vmIntrinsics::_getFloatVolatile:
330 case vmIntrinsics::_getDoubleVolatile:
331 case vmIntrinsics::_putReferenceVolatile:
332 case vmIntrinsics::_putBooleanVolatile:
333 case vmIntrinsics::_putByteVolatile:
334 case vmIntrinsics::_putShortVolatile:
335 case vmIntrinsics::_putCharVolatile:
336 case vmIntrinsics::_putIntVolatile:
337 case vmIntrinsics::_putLongVolatile:
338 case vmIntrinsics::_putFloatVolatile:
339 case vmIntrinsics::_putDoubleVolatile:
340 case vmIntrinsics::_getReferenceAcquire:
341 case vmIntrinsics::_getBooleanAcquire:
342 case vmIntrinsics::_getByteAcquire:
343 case vmIntrinsics::_getShortAcquire:
344 case vmIntrinsics::_getCharAcquire:
345 case vmIntrinsics::_getIntAcquire:
346 case vmIntrinsics::_getLongAcquire:
347 case vmIntrinsics::_getFloatAcquire:
348 case vmIntrinsics::_getDoubleAcquire:
349 case vmIntrinsics::_putReferenceRelease:
350 case vmIntrinsics::_putBooleanRelease:
351 case vmIntrinsics::_putByteRelease:
352 case vmIntrinsics::_putShortRelease:
353 case vmIntrinsics::_putCharRelease:
354 case vmIntrinsics::_putIntRelease:
355 case vmIntrinsics::_putLongRelease:
356 case vmIntrinsics::_putFloatRelease:
357 case vmIntrinsics::_putDoubleRelease:
358 case vmIntrinsics::_getReferenceOpaque:
359 case vmIntrinsics::_getBooleanOpaque:
360 case vmIntrinsics::_getByteOpaque:
361 case vmIntrinsics::_getShortOpaque:
362 case vmIntrinsics::_getCharOpaque:
363 case vmIntrinsics::_getIntOpaque:
364 case vmIntrinsics::_getLongOpaque:
365 case vmIntrinsics::_getFloatOpaque:
366 case vmIntrinsics::_getDoubleOpaque:
367 case vmIntrinsics::_putReferenceOpaque:
368 case vmIntrinsics::_putBooleanOpaque:
369 case vmIntrinsics::_putByteOpaque:
370 case vmIntrinsics::_putShortOpaque:
371 case vmIntrinsics::_putCharOpaque:
372 case vmIntrinsics::_putIntOpaque:
373 case vmIntrinsics::_putLongOpaque:
374 case vmIntrinsics::_putFloatOpaque:
375 case vmIntrinsics::_putDoubleOpaque:
376 case vmIntrinsics::_getAndAddInt:
377 case vmIntrinsics::_getAndAddLong:
378 case vmIntrinsics::_getAndSetInt:
379 case vmIntrinsics::_getAndSetLong:
380 case vmIntrinsics::_getAndSetReference:
381 case vmIntrinsics::_loadFence:
382 case vmIntrinsics::_storeFence:
383 case vmIntrinsics::_fullFence:
384 case vmIntrinsics::_compareAndSetLong:
385 case vmIntrinsics::_weakCompareAndSetLong:
386 case vmIntrinsics::_weakCompareAndSetLongPlain:
387 case vmIntrinsics::_weakCompareAndSetLongAcquire:
388 case vmIntrinsics::_weakCompareAndSetLongRelease:
389 case vmIntrinsics::_compareAndSetInt:
390 case vmIntrinsics::_weakCompareAndSetInt:
391 case vmIntrinsics::_weakCompareAndSetIntPlain:
392 case vmIntrinsics::_weakCompareAndSetIntAcquire:
393 case vmIntrinsics::_weakCompareAndSetIntRelease:
394 case vmIntrinsics::_compareAndSetReference:
395 case vmIntrinsics::_weakCompareAndSetReference:
396 case vmIntrinsics::_weakCompareAndSetReferencePlain:
397 case vmIntrinsics::_weakCompareAndSetReferenceAcquire:
398 case vmIntrinsics::_weakCompareAndSetReferenceRelease:
399 case vmIntrinsics::_compareAndExchangeInt:
400 case vmIntrinsics::_compareAndExchangeIntAcquire:
401 case vmIntrinsics::_compareAndExchangeIntRelease:
402 case vmIntrinsics::_compareAndExchangeLong:
403 case vmIntrinsics::_compareAndExchangeLongAcquire:
404 case vmIntrinsics::_compareAndExchangeLongRelease:
405 case vmIntrinsics::_compareAndExchangeReference:
406 case vmIntrinsics::_compareAndExchangeReferenceAcquire:
407 case vmIntrinsics::_compareAndExchangeReferenceRelease:
408 if (!InlineUnsafeOps) return true;
409 break;
410 case vmIntrinsics::_getShortUnaligned:
411 case vmIntrinsics::_getCharUnaligned:
412 case vmIntrinsics::_getIntUnaligned:
413 case vmIntrinsics::_getLongUnaligned:
414 case vmIntrinsics::_putShortUnaligned:
415 case vmIntrinsics::_putCharUnaligned:
416 case vmIntrinsics::_putIntUnaligned:
417 case vmIntrinsics::_putLongUnaligned:
418 case vmIntrinsics::_allocateInstance:
419 if (!InlineUnsafeOps || !UseUnalignedAccesses) return true;
420 break;
421 case vmIntrinsics::_hashCode:
422 if (!InlineObjectHash) return true;
423 break;
424 case vmIntrinsics::_aescrypt_encryptBlock:
425 case vmIntrinsics::_aescrypt_decryptBlock:
426 if (!UseAESIntrinsics) return true;
427 break;
428 case vmIntrinsics::_cipherBlockChaining_encryptAESCrypt:
429 case vmIntrinsics::_cipherBlockChaining_decryptAESCrypt:
430 if (!UseAESIntrinsics) return true;
431 break;
432 case vmIntrinsics::_electronicCodeBook_encryptAESCrypt:
433 case vmIntrinsics::_electronicCodeBook_decryptAESCrypt:
434 if (!UseAESIntrinsics) return true;
435 break;
436 case vmIntrinsics::_counterMode_AESCrypt:
437 if (!UseAESCTRIntrinsics) return true;
438 break;
439 case vmIntrinsics::_galoisCounterMode_AESCrypt:
440 if (!UseAESIntrinsics) return true;
441 break;
442 case vmIntrinsics::_md5_implCompress:
443 if (!UseMD5Intrinsics) return true;
444 break;
445 case vmIntrinsics::_sha_implCompress:
446 if (!UseSHA1Intrinsics) return true;
447 break;
448 case vmIntrinsics::_sha2_implCompress:
449 if (!UseSHA256Intrinsics) return true;
450 break;
451 case vmIntrinsics::_sha5_implCompress:
452 if (!UseSHA512Intrinsics) return true;
453 break;
454 case vmIntrinsics::_sha3_implCompress:
455 if (!UseSHA3Intrinsics) return true;
456 break;
457 case vmIntrinsics::_digestBase_implCompressMB:
458 if (!(UseMD5Intrinsics || UseSHA1Intrinsics || UseSHA256Intrinsics || UseSHA512Intrinsics || UseSHA3Intrinsics)) return true;
459 break;
460 case vmIntrinsics::_ghash_processBlocks:
461 if (!UseGHASHIntrinsics) return true;
462 break;
463 case vmIntrinsics::_base64_encodeBlock:
464 case vmIntrinsics::_base64_decodeBlock:
465 if (!UseBASE64Intrinsics) return true;
466 break;
467 case vmIntrinsics::_updateBytesCRC32C:
468 case vmIntrinsics::_updateDirectByteBufferCRC32C:
469 if (!UseCRC32CIntrinsics) return true;
470 break;
471 case vmIntrinsics::_vectorizedMismatch:
472 if (!UseVectorizedMismatchIntrinsic) return true;
473 break;
474 case vmIntrinsics::_updateBytesAdler32:
475 case vmIntrinsics::_updateByteBufferAdler32:
476 if (!UseAdler32Intrinsics) return true;
477 break;
478 case vmIntrinsics::_copyMemory:
479 if (!InlineArrayCopy || !InlineUnsafeOps) return true;
480 break;
481 #ifdef COMPILER2
482 case vmIntrinsics::_clone:
483 case vmIntrinsics::_copyOf:
484 case vmIntrinsics::_copyOfRange:
485 // These intrinsics use both the objectcopy and the arraycopy
486 // intrinsic mechanism.
487 if (!InlineObjectCopy || !InlineArrayCopy) return true;
488 break;
489 case vmIntrinsics::_compareToL:
490 case vmIntrinsics::_compareToU:
491 case vmIntrinsics::_compareToLU:
492 case vmIntrinsics::_compareToUL:
493 if (!SpecialStringCompareTo) return true;
494 break;
495 case vmIntrinsics::_indexOfL:
496 case vmIntrinsics::_indexOfU:
497 case vmIntrinsics::_indexOfUL:
498 case vmIntrinsics::_indexOfIL:
499 case vmIntrinsics::_indexOfIU:
500 case vmIntrinsics::_indexOfIUL:
501 case vmIntrinsics::_indexOfU_char:
502 case vmIntrinsics::_indexOfL_char:
503 if (!SpecialStringIndexOf) return true;
504 break;
505 case vmIntrinsics::_equalsL:
506 case vmIntrinsics::_equalsU:
507 if (!SpecialStringEquals) return true;
508 break;
509 case vmIntrinsics::_equalsB:
510 case vmIntrinsics::_equalsC:
511 if (!SpecialArraysEquals) return true;
512 break;
513 case vmIntrinsics::_encodeISOArray:
514 case vmIntrinsics::_encodeAsciiArray:
515 case vmIntrinsics::_encodeByteISOArray:
516 if (!SpecialEncodeISOArray) return true;
517 break;
518 case vmIntrinsics::_getCallerClass:
519 if (!InlineReflectionGetCallerClass) return true;
520 break;
521 case vmIntrinsics::_multiplyToLen:
522 if (!UseMultiplyToLenIntrinsic) return true;
523 break;
524 case vmIntrinsics::_squareToLen:
525 if (!UseSquareToLenIntrinsic) return true;
526 break;
527 case vmIntrinsics::_mulAdd:
528 if (!UseMulAddIntrinsic) return true;
529 break;
530 case vmIntrinsics::_montgomeryMultiply:
531 if (!UseMontgomeryMultiplyIntrinsic) return true;
532 break;
533 case vmIntrinsics::_montgomerySquare:
534 if (!UseMontgomerySquareIntrinsic) return true;
535 break;
536 case vmIntrinsics::_bigIntegerRightShiftWorker:
537 case vmIntrinsics::_bigIntegerLeftShiftWorker:
538 break;
539 case vmIntrinsics::_addExactI:
540 case vmIntrinsics::_addExactL:
541 case vmIntrinsics::_decrementExactI:
542 case vmIntrinsics::_decrementExactL:
543 case vmIntrinsics::_incrementExactI:
544 case vmIntrinsics::_incrementExactL:
545 case vmIntrinsics::_multiplyExactI:
546 case vmIntrinsics::_multiplyExactL:
547 case vmIntrinsics::_negateExactI:
548 case vmIntrinsics::_negateExactL:
549 case vmIntrinsics::_subtractExactI:
550 case vmIntrinsics::_subtractExactL:
551 if (!UseMathExactIntrinsics || !InlineMathNatives) return true;
552 break;
553 case vmIntrinsics::_isDigit:
554 case vmIntrinsics::_isLowerCase:
555 case vmIntrinsics::_isUpperCase:
556 case vmIntrinsics::_isWhitespace:
557 if (!UseCharacterCompareIntrinsics) return true;
558 break;
559 case vmIntrinsics::_dcopySign:
560 case vmIntrinsics::_fcopySign:
561 if (!InlineMathNatives || !UseCopySignIntrinsic) return true;
562 break;
563 case vmIntrinsics::_dsignum:
564 case vmIntrinsics::_fsignum:
565 if (!InlineMathNatives || !UseSignumIntrinsic) return true;
566 break;
567 #endif // COMPILER2
568 default:
569 return false;
570 }
571
572 return false;
573 }
574
575 #define VM_INTRINSIC_INITIALIZE(id, klass, name, sig, flags) #id "\0"
576 static const char* vm_intrinsic_name_bodies =
577 VM_INTRINSICS_DO(VM_INTRINSIC_INITIALIZE,
578 VM_SYMBOL_IGNORE, VM_SYMBOL_IGNORE, VM_SYMBOL_IGNORE, VM_ALIAS_IGNORE);
579
580 static const char* vm_intrinsic_name_table[vmIntrinsics::number_of_intrinsics()];
581 static TriBoolArray<(size_t)vmIntrinsics::number_of_intrinsics(), int> vm_intrinsic_control_words;
582
583 void vmIntrinsics::init_vm_intrinsic_name_table() {
584 const char** nt = &vm_intrinsic_name_table[0];
585 char* string = (char*) &vm_intrinsic_name_bodies[0];
586
587 for (auto index : EnumRange<vmIntrinsicID>{}) {
588 nt[as_int(index)] = string;
589 string += strlen(string); // skip string body
590 string += 1; // skip trailing null
591 }
592 assert(!strcmp(nt[as_int(vmIntrinsics::_hashCode)], "_hashCode"), "lined up");
593 nt[as_int(vmIntrinsics::_none)] = "_none";
594 }
595
596 const char* vmIntrinsics::name_at(vmIntrinsics::ID id) {
597 const char** nt = &vm_intrinsic_name_table[0];
598 if (nt[as_int(_none)] == NULL) {
599 init_vm_intrinsic_name_table();
600 }
601
602 if (id < ID_LIMIT)
603 return vm_intrinsic_name_table[as_int(id)];
604 else
605 return "(unknown intrinsic)";
606 }
607
608 vmIntrinsics::ID vmIntrinsics::find_id(const char* name) {
609 const char** nt = &vm_intrinsic_name_table[0];
610 if (nt[as_int(_none)] == NULL) {
611 init_vm_intrinsic_name_table();
612 }
613
614 for (auto index : EnumRange<vmIntrinsicID>{}) {
615 if (0 == strcmp(name, nt[as_int(index)])) {
616 return index;
617 }
618 }
619
620 return _none;
621 }
622
623 bool vmIntrinsics::is_disabled_by_flags(const methodHandle& method) {
624 vmIntrinsics::ID id = method->intrinsic_id();
625 return is_disabled_by_flags(id);
626 }
627
628 bool vmIntrinsics::is_disabled_by_flags(vmIntrinsics::ID id) {
629 assert(id > _none && id < ID_LIMIT, "must be a VM intrinsic");
630
631 // not initialized yet, process Control/DisableIntrinsic
632 if (vm_intrinsic_control_words[as_int(_none)].is_default()) {
633 for (ControlIntrinsicIter iter(ControlIntrinsic); *iter != NULL; ++iter) {
634 vmIntrinsics::ID id = vmIntrinsics::find_id(*iter);
635
636 if (id != vmIntrinsics::_none) {
637 vm_intrinsic_control_words[as_int(id)] = iter.is_enabled() && !disabled_by_jvm_flags(id);
638 }
639 }
640
641 // Order matters, DisableIntrinsic can overwrite ControlIntrinsic
642 for (ControlIntrinsicIter iter(DisableIntrinsic, true/*disable_all*/); *iter != NULL; ++iter) {
643 vmIntrinsics::ID id = vmIntrinsics::find_id(*iter);
644
645 if (id != vmIntrinsics::_none) {
646 vm_intrinsic_control_words[as_int(id)] = false;
647 }
648 }
649
650 vm_intrinsic_control_words[as_int(_none)] = true;
651 }
652
653 TriBool b = vm_intrinsic_control_words[as_int(id)];
654 if (b.is_default()) {
655 // unknown yet, query and cache it
656 b = vm_intrinsic_control_words[as_int(id)] = !disabled_by_jvm_flags(id);
657 }
658
659 return !b;
660 }
661
662 // These are for forming case labels:
663 #define ID3(x, y, z) (( jlong)(z) + \
664 ((jlong)(y) << vmSymbols::log2_SID_LIMIT) + \
665 ((jlong)(x) << (2*vmSymbols::log2_SID_LIMIT)) )
666 #define SID_ENUM(n) VM_SYMBOL_ENUM_NAME(n)
667
668 vmIntrinsics::ID vmIntrinsics::find_id_impl(vmSymbolID holder,
669 vmSymbolID name,
670 vmSymbolID sig,
671 jshort flags) {
672 assert((int)vmSymbolID::SID_LIMIT <= (1<<vmSymbols::log2_SID_LIMIT), "must fit");
673
674 // Let the C compiler build the decision tree.
675
676 #define VM_INTRINSIC_CASE(id, klass, name, sig, fcode) \
677 case ID3(SID_ENUM(klass), SID_ENUM(name), SID_ENUM(sig)): \
678 if (!match_##fcode(flags)) break; \
679 return id;
680
681 switch (ID3(holder, name, sig)) {
682 VM_INTRINSICS_DO(VM_INTRINSIC_CASE,
683 VM_SYMBOL_IGNORE, VM_SYMBOL_IGNORE, VM_SYMBOL_IGNORE, VM_ALIAS_IGNORE);
684 }
685 return vmIntrinsics::_none;
686
687 #undef VM_INTRINSIC_CASE
688 }
689
690 class vmIntrinsicsLookup {
691 bool _class_map[vmSymbols::number_of_symbols()];
692
693 constexpr int as_index(vmSymbolID id) const {
694 int index = vmSymbols::as_int(id);
695 assert(0 <= index && index < int(sizeof(_class_map)), "must be");
696 return index;
697 }
698
699 constexpr void set_class_map(vmSymbolID id) {
700 _class_map[as_index(id)] = true;
701 }
702
703 public:
704 constexpr vmIntrinsicsLookup() : _class_map() {
705
706 #define VM_INTRINSIC_CLASS_MAP(id, klass, name, sig, fcode) \
707 set_class_map(SID_ENUM(klass));
708
709 VM_INTRINSICS_DO(VM_INTRINSIC_CLASS_MAP,
710 VM_SYMBOL_IGNORE, VM_SYMBOL_IGNORE, VM_SYMBOL_IGNORE, VM_ALIAS_IGNORE);
711 #undef VM_INTRINSIC_CLASS_MAP
712
713
714 // A few slightly irregular cases. See Method::init_intrinsic_id
715 set_class_map(SID_ENUM(java_lang_StrictMath));
716 set_class_map(SID_ENUM(java_lang_invoke_MethodHandle));
717 set_class_map(SID_ENUM(java_lang_invoke_VarHandle));
718 }
719
720 bool class_has_intrinsics(vmSymbolID holder) const {
721 return _class_map[as_index(holder)];
722 }
723 };
724
725 constexpr vmIntrinsicsLookup _intrinsics_lookup;
726
727 bool vmIntrinsics::class_has_intrinsics(vmSymbolID holder) {
728 return _intrinsics_lookup.class_has_intrinsics(holder);
729 }
730
731 const char* vmIntrinsics::short_name_as_C_string(vmIntrinsics::ID id, char* buf, int buflen) {
732 const char* str = name_at(id);
733 #ifndef PRODUCT
734 const char* kname = vmSymbols::name_for(class_for(id));
735 const char* mname = vmSymbols::name_for(name_for(id));
736 const char* sname = vmSymbols::name_for(signature_for(id));
737 const char* fname = "";
738 switch (flags_for(id)) {
739 case F_Y: fname = "synchronized "; break;
740 case F_RN: fname = "native "; break;
741 case F_SN: fname = "native static "; break;
742 case F_S: fname = "static "; break;
743 default: break;
744 }
745 const char* kptr = strrchr(kname, JVM_SIGNATURE_SLASH);
746 if (kptr != NULL) kname = kptr + 1;
747 int len = jio_snprintf(buf, buflen, "%s: %s%s.%s%s",
748 str, fname, kname, mname, sname);
749 if (len < buflen)
750 str = buf;
751 #endif //PRODUCT
752 return str;
753 }
754
755
756 // These are to get information about intrinsics.
757
758 #define ID4(x, y, z, f) ((ID3(x, y, z) << vmIntrinsics::log2_FLAG_LIMIT) | (jlong) (f))
759
760 #ifndef PRODUCT
761 static const jlong intrinsic_info_array[vmIntrinsics::number_of_intrinsics()+1] = {
762 #define VM_INTRINSIC_INFO(ignore_id, klass, name, sig, fcode) \
763 ID4(SID_ENUM(klass), SID_ENUM(name), SID_ENUM(sig), vmIntrinsics::fcode),
764
765 0, VM_INTRINSICS_DO(VM_INTRINSIC_INFO,
766 VM_SYMBOL_IGNORE, VM_SYMBOL_IGNORE, VM_SYMBOL_IGNORE, VM_ALIAS_IGNORE)
767 0
768 #undef VM_INTRINSIC_INFO
769 };
770
771 inline jlong intrinsic_info(vmIntrinsics::ID id) {
772 return intrinsic_info_array[vmIntrinsics::as_int(id)];
773 }
774
775 vmSymbolID vmIntrinsics::class_for(vmIntrinsics::ID id) {
776 jlong info = intrinsic_info(id);
777 int shift = 2*vmSymbols::log2_SID_LIMIT + log2_FLAG_LIMIT, mask = right_n_bits(vmSymbols::log2_SID_LIMIT);
778 assert(((ID4(1021,1022,1023,7) >> shift) & mask) == 1021, "");
779 return vmSymbols::as_SID( (info >> shift) & mask );
780 }
781
782 vmSymbolID vmIntrinsics::name_for(vmIntrinsics::ID id) {
783 jlong info = intrinsic_info(id);
784 int shift = vmSymbols::log2_SID_LIMIT + log2_FLAG_LIMIT, mask = right_n_bits(vmSymbols::log2_SID_LIMIT);
785 assert(((ID4(1021,1022,1023,7) >> shift) & mask) == 1022, "");
786 return vmSymbols::as_SID( (info >> shift) & mask );
787 }
788
789 vmSymbolID vmIntrinsics::signature_for(vmIntrinsics::ID id) {
790 jlong info = intrinsic_info(id);
791 int shift = log2_FLAG_LIMIT, mask = right_n_bits(vmSymbols::log2_SID_LIMIT);
792 assert(((ID4(1021,1022,1023,7) >> shift) & mask) == 1023, "");
793 return vmSymbols::as_SID( (info >> shift) & mask );
794 }
795
796 vmIntrinsics::Flags vmIntrinsics::flags_for(vmIntrinsics::ID id) {
797 jlong info = intrinsic_info(id);
798 int shift = 0, mask = right_n_bits(log2_FLAG_LIMIT);
799 assert(((ID4(1021,1022,1023,7) >> shift) & mask) == 7, "");
800 return Flags( (info >> shift) & mask );
801 }
802 #endif // !PRODUCT