1 /*
2 * Copyright (c) 2020, 2022, 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 "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 | JVM_ACC_NATIVE;
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 | JVM_ACC_NATIVE;
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 | JVM_ACC_NATIVE;
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::_currentCarrierThread:
79 case vmIntrinsics::_currentThread:
80 case vmIntrinsics::_scopedValueCache:
81 case vmIntrinsics::_dabs:
82 case vmIntrinsics::_fabs:
83 case vmIntrinsics::_iabs:
84 case vmIntrinsics::_labs:
85 case vmIntrinsics::_dsqrt:
86 case vmIntrinsics::_dsqrt_strict:
87 case vmIntrinsics::_dsin:
88 case vmIntrinsics::_dcos:
89 case vmIntrinsics::_dtan:
90 case vmIntrinsics::_dlog:
91 case vmIntrinsics::_dlog10:
92 case vmIntrinsics::_dexp:
93 case vmIntrinsics::_dpow:
94 case vmIntrinsics::_Preconditions_checkIndex:
95 case vmIntrinsics::_Preconditions_checkLongIndex:
96 case vmIntrinsics::_Reference_get:
97 case vmIntrinsics::_Continuation_doYield:
98 case vmIntrinsics::_updateCRC32:
99 case vmIntrinsics::_updateBytesCRC32:
100 case vmIntrinsics::_updateByteBufferCRC32:
101 case vmIntrinsics::_updateBytesAdler32:
102 case vmIntrinsics::_vectorizedMismatch:
103 case vmIntrinsics::_fmaD:
104 case vmIntrinsics::_fmaF:
105 case vmIntrinsics::_isDigit:
106 case vmIntrinsics::_isLowerCase:
107 case vmIntrinsics::_isUpperCase:
108 case vmIntrinsics::_isWhitespace:
109 return true;
110 default:
111 return false;
112 }
113 }
114
115 bool vmIntrinsics::can_trap(vmIntrinsics::ID id) {
116 assert(id != vmIntrinsics::_none, "must be a VM intrinsic");
117 switch(id) {
118 #ifdef JFR_HAVE_INTRINSICS
119 case vmIntrinsics::_counterTime:
120 #endif
121 case vmIntrinsics::_currentTimeMillis:
122 case vmIntrinsics::_nanoTime:
123 case vmIntrinsics::_floatToRawIntBits:
124 case vmIntrinsics::_intBitsToFloat:
125 case vmIntrinsics::_doubleToRawLongBits:
126 case vmIntrinsics::_longBitsToDouble:
127 case vmIntrinsics::_currentCarrierThread:
128 case vmIntrinsics::_currentThread:
129 case vmIntrinsics::_setCurrentThread:
130 case vmIntrinsics::_scopedValueCache:
131 case vmIntrinsics::_setScopedValueCache:
132 case vmIntrinsics::_dabs:
133 case vmIntrinsics::_fabs:
134 case vmIntrinsics::_iabs:
135 case vmIntrinsics::_labs:
136 case vmIntrinsics::_dsqrt:
137 case vmIntrinsics::_dsqrt_strict:
138 case vmIntrinsics::_dsin:
139 case vmIntrinsics::_dcos:
140 case vmIntrinsics::_dtan:
141 case vmIntrinsics::_dlog:
142 case vmIntrinsics::_dlog10:
143 case vmIntrinsics::_dexp:
144 case vmIntrinsics::_dpow:
145 case vmIntrinsics::_updateCRC32:
146 case vmIntrinsics::_updateBytesCRC32:
147 case vmIntrinsics::_updateByteBufferCRC32:
148 case vmIntrinsics::_vectorizedMismatch:
149 case vmIntrinsics::_fmaD:
150 case vmIntrinsics::_fmaF:
151 return false;
152 default:
153 return true;
154 }
155 }
156
157 // Some intrinsics produce different results if they are not pinned
158 bool vmIntrinsics::should_be_pinned(vmIntrinsics::ID id) {
159 assert(id != vmIntrinsics::_none, "must be a VM intrinsic");
160 switch(id) {
161 #ifdef JFR_HAVE_INTRINSICS
162 case vmIntrinsics::_counterTime:
163 #endif
164 case vmIntrinsics::_currentTimeMillis:
165 case vmIntrinsics::_nanoTime:
166 case vmIntrinsics::_blackhole:
167 return true;
168 default:
169 return false;
170 }
171 }
172
173 bool vmIntrinsics::does_virtual_dispatch(vmIntrinsics::ID id) {
174 assert(id != vmIntrinsics::_none, "must be a VM intrinsic");
175 switch(id) {
176 case vmIntrinsics::_hashCode:
177 case vmIntrinsics::_clone:
178 return true;
179 break;
180 default:
181 return false;
182 }
183 }
184
185 int vmIntrinsics::predicates_needed(vmIntrinsics::ID id) {
186 assert(id != vmIntrinsics::_none, "must be a VM intrinsic");
187 switch (id) {
188 case vmIntrinsics::_cipherBlockChaining_encryptAESCrypt:
189 case vmIntrinsics::_cipherBlockChaining_decryptAESCrypt:
190 case vmIntrinsics::_electronicCodeBook_encryptAESCrypt:
191 case vmIntrinsics::_electronicCodeBook_decryptAESCrypt:
192 case vmIntrinsics::_counterMode_AESCrypt:
193 case vmIntrinsics::_galoisCounterMode_AESCrypt:
194 return 1;
195 case vmIntrinsics::_digestBase_implCompressMB:
196 return 5;
197 default:
198 return 0;
199 }
200 }
201
202 bool vmIntrinsics::disabled_by_jvm_flags(vmIntrinsics::ID id) {
203 assert(id != vmIntrinsics::_none, "must be a VM intrinsic");
204
205 // -XX:-InlineNatives disables nearly all intrinsics except the ones listed in
206 // the following switch statement.
207 if (!InlineNatives) {
208 switch (id) {
209 case vmIntrinsics::_indexOfL:
210 case vmIntrinsics::_indexOfU:
211 case vmIntrinsics::_indexOfUL:
212 case vmIntrinsics::_indexOfIL:
213 case vmIntrinsics::_indexOfIU:
214 case vmIntrinsics::_indexOfIUL:
215 case vmIntrinsics::_indexOfU_char:
216 case vmIntrinsics::_indexOfL_char:
217 case vmIntrinsics::_compareToL:
218 case vmIntrinsics::_compareToU:
219 case vmIntrinsics::_compareToLU:
220 case vmIntrinsics::_compareToUL:
221 case vmIntrinsics::_equalsL:
222 case vmIntrinsics::_equalsU:
223 case vmIntrinsics::_equalsC:
224 case vmIntrinsics::_getCharStringU:
225 case vmIntrinsics::_putCharStringU:
226 case vmIntrinsics::_compressStringC:
227 case vmIntrinsics::_compressStringB:
228 case vmIntrinsics::_inflateStringC:
229 case vmIntrinsics::_inflateStringB:
230 case vmIntrinsics::_getAndAddInt:
231 case vmIntrinsics::_getAndAddLong:
232 case vmIntrinsics::_getAndSetInt:
233 case vmIntrinsics::_getAndSetLong:
234 case vmIntrinsics::_getAndSetReference:
235 case vmIntrinsics::_loadFence:
236 case vmIntrinsics::_storeFence:
237 case vmIntrinsics::_fullFence:
238 case vmIntrinsics::_countPositives:
239 case vmIntrinsics::_Reference_get:
240 case vmIntrinsics::_Continuation_doYield:
241 case vmIntrinsics::_Continuation_enterSpecial:
242 break;
243 default:
244 return true;
245 }
246 }
247
248 switch (id) {
249 case vmIntrinsics::_asPrimaryType:
250 case vmIntrinsics::_asPrimaryTypeArg:
251 case vmIntrinsics::_asValueType:
252 case vmIntrinsics::_asValueTypeArg:
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::_arraycopy:
316 if (!InlineArrayCopy) return true;
317 break;
318 case vmIntrinsics::_updateCRC32:
319 case vmIntrinsics::_updateBytesCRC32:
320 case vmIntrinsics::_updateByteBufferCRC32:
321 if (!UseCRC32Intrinsics) return true;
322 break;
323 case vmIntrinsics::_makePrivateBuffer:
324 case vmIntrinsics::_finishPrivateBuffer:
325 case vmIntrinsics::_getReference:
326 case vmIntrinsics::_getBoolean:
327 case vmIntrinsics::_getByte:
328 case vmIntrinsics::_getShort:
329 case vmIntrinsics::_getChar:
330 case vmIntrinsics::_getInt:
331 case vmIntrinsics::_getLong:
332 case vmIntrinsics::_getFloat:
333 case vmIntrinsics::_getDouble:
334 case vmIntrinsics::_getValue:
335 case vmIntrinsics::_putReference:
336 case vmIntrinsics::_putBoolean:
337 case vmIntrinsics::_putByte:
338 case vmIntrinsics::_putShort:
339 case vmIntrinsics::_putChar:
340 case vmIntrinsics::_putInt:
341 case vmIntrinsics::_putLong:
342 case vmIntrinsics::_putFloat:
343 case vmIntrinsics::_putDouble:
344 case vmIntrinsics::_putValue:
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::_equalsB:
539 case vmIntrinsics::_equalsC:
540 if (!SpecialArraysEquals) return true;
541 break;
542 case vmIntrinsics::_encodeISOArray:
543 case vmIntrinsics::_encodeAsciiArray:
544 case vmIntrinsics::_encodeByteISOArray:
545 if (!SpecialEncodeISOArray) return true;
546 break;
547 case vmIntrinsics::_getCallerClass:
548 if (!InlineReflectionGetCallerClass) return true;
549 break;
550 case vmIntrinsics::_multiplyToLen:
551 if (!UseMultiplyToLenIntrinsic) return true;
552 break;
553 case vmIntrinsics::_squareToLen:
554 if (!UseSquareToLenIntrinsic) return true;
555 break;
556 case vmIntrinsics::_mulAdd:
557 if (!UseMulAddIntrinsic) return true;
558 break;
559 case vmIntrinsics::_montgomeryMultiply:
560 if (!UseMontgomeryMultiplyIntrinsic) return true;
561 break;
562 case vmIntrinsics::_montgomerySquare:
563 if (!UseMontgomerySquareIntrinsic) return true;
564 break;
565 case vmIntrinsics::_bigIntegerRightShiftWorker:
566 case vmIntrinsics::_bigIntegerLeftShiftWorker:
567 break;
568 case vmIntrinsics::_addExactI:
569 case vmIntrinsics::_addExactL:
570 case vmIntrinsics::_decrementExactI:
571 case vmIntrinsics::_decrementExactL:
572 case vmIntrinsics::_incrementExactI:
573 case vmIntrinsics::_incrementExactL:
574 case vmIntrinsics::_multiplyExactI:
575 case vmIntrinsics::_multiplyExactL:
576 case vmIntrinsics::_negateExactI:
577 case vmIntrinsics::_negateExactL:
578 case vmIntrinsics::_subtractExactI:
579 case vmIntrinsics::_subtractExactL:
580 if (!UseMathExactIntrinsics || !InlineMathNatives) return true;
581 break;
582 case vmIntrinsics::_isDigit:
583 case vmIntrinsics::_isLowerCase:
584 case vmIntrinsics::_isUpperCase:
585 case vmIntrinsics::_isWhitespace:
586 if (!UseCharacterCompareIntrinsics) return true;
587 break;
588 case vmIntrinsics::_dcopySign:
589 case vmIntrinsics::_fcopySign:
590 if (!InlineMathNatives || !UseCopySignIntrinsic) return true;
591 break;
592 case vmIntrinsics::_dsignum:
593 case vmIntrinsics::_fsignum:
594 if (!InlineMathNatives || !UseSignumIntrinsic) return true;
595 break;
596 #endif // COMPILER2
597 default:
598 return false;
599 }
600
601 return false;
602 }
603
604 #define VM_INTRINSIC_INITIALIZE(id, klass, name, sig, flags) #id "\0"
605 static const char* vm_intrinsic_name_bodies =
606 VM_INTRINSICS_DO(VM_INTRINSIC_INITIALIZE,
607 VM_SYMBOL_IGNORE, VM_SYMBOL_IGNORE, VM_SYMBOL_IGNORE, VM_ALIAS_IGNORE);
608
609 static const char* vm_intrinsic_name_table[vmIntrinsics::number_of_intrinsics()];
610 static TriBoolArray<(size_t)vmIntrinsics::number_of_intrinsics(), int> vm_intrinsic_control_words;
611
612 void vmIntrinsics::init_vm_intrinsic_name_table() {
613 const char** nt = &vm_intrinsic_name_table[0];
614 char* string = (char*) &vm_intrinsic_name_bodies[0];
615
616 for (auto index : EnumRange<vmIntrinsicID>{}) {
617 nt[as_int(index)] = string;
618 string += strlen(string); // skip string body
619 string += 1; // skip trailing null
620 }
621 assert(!strcmp(nt[as_int(vmIntrinsics::_hashCode)], "_hashCode"), "lined up");
622 nt[as_int(vmIntrinsics::_none)] = "_none";
623 }
624
625 const char* vmIntrinsics::name_at(vmIntrinsics::ID id) {
626 const char** nt = &vm_intrinsic_name_table[0];
627 if (nt[as_int(_none)] == NULL) {
628 init_vm_intrinsic_name_table();
629 }
630
631 if (id < ID_LIMIT)
632 return vm_intrinsic_name_table[as_int(id)];
633 else
634 return "(unknown intrinsic)";
635 }
636
637 vmIntrinsics::ID vmIntrinsics::find_id(const char* name) {
638 const char** nt = &vm_intrinsic_name_table[0];
639 if (nt[as_int(_none)] == NULL) {
640 init_vm_intrinsic_name_table();
641 }
642
643 for (auto index : EnumRange<vmIntrinsicID>{}) {
644 if (0 == strcmp(name, nt[as_int(index)])) {
645 return index;
646 }
647 }
648
649 return _none;
650 }
651
652 bool vmIntrinsics::is_disabled_by_flags(const methodHandle& method) {
653 vmIntrinsics::ID id = method->intrinsic_id();
654 return is_disabled_by_flags(id);
655 }
656
657 bool vmIntrinsics::is_disabled_by_flags(vmIntrinsics::ID id) {
658 assert(id > _none && id < ID_LIMIT, "must be a VM intrinsic");
659
660 // not initialized yet, process Control/DisableIntrinsic
661 if (vm_intrinsic_control_words[as_int(_none)].is_default()) {
662 for (ControlIntrinsicIter iter(ControlIntrinsic); *iter != NULL; ++iter) {
663 vmIntrinsics::ID id = vmIntrinsics::find_id(*iter);
664
665 if (id != vmIntrinsics::_none) {
666 vm_intrinsic_control_words[as_int(id)] = iter.is_enabled() && !disabled_by_jvm_flags(id);
667 }
668 }
669
670 // Order matters, DisableIntrinsic can overwrite ControlIntrinsic
671 for (ControlIntrinsicIter iter(DisableIntrinsic, true/*disable_all*/); *iter != NULL; ++iter) {
672 vmIntrinsics::ID id = vmIntrinsics::find_id(*iter);
673
674 if (id != vmIntrinsics::_none) {
675 vm_intrinsic_control_words[as_int(id)] = false;
676 }
677 }
678
679 vm_intrinsic_control_words[as_int(_none)] = true;
680 }
681
682 TriBool b = vm_intrinsic_control_words[as_int(id)];
683 if (b.is_default()) {
684 // unknown yet, query and cache it
685 b = vm_intrinsic_control_words[as_int(id)] = !disabled_by_jvm_flags(id);
686 }
687
688 return !b;
689 }
690
691 // These are for forming case labels:
692 #define ID3(x, y, z) (( jlong)(z) + \
693 ((jlong)(y) << vmSymbols::log2_SID_LIMIT) + \
694 ((jlong)(x) << (2*vmSymbols::log2_SID_LIMIT)) )
695 #define SID_ENUM(n) VM_SYMBOL_ENUM_NAME(n)
696
697 vmIntrinsics::ID vmIntrinsics::find_id_impl(vmSymbolID holder,
698 vmSymbolID name,
699 vmSymbolID sig,
700 jshort flags) {
701 assert((int)vmSymbolID::SID_LIMIT <= (1<<vmSymbols::log2_SID_LIMIT), "must fit");
702
703 // Let the C compiler build the decision tree.
704
705 #define VM_INTRINSIC_CASE(id, klass, name, sig, fcode) \
706 case ID3(SID_ENUM(klass), SID_ENUM(name), SID_ENUM(sig)): \
707 if (!match_##fcode(flags)) break; \
708 return id;
709
710 switch (ID3(holder, name, sig)) {
711 VM_INTRINSICS_DO(VM_INTRINSIC_CASE,
712 VM_SYMBOL_IGNORE, VM_SYMBOL_IGNORE, VM_SYMBOL_IGNORE, VM_ALIAS_IGNORE);
713 }
714 return vmIntrinsics::_none;
715
716 #undef VM_INTRINSIC_CASE
717 }
718
719 class vmIntrinsicsLookup {
720 bool _class_map[vmSymbols::number_of_symbols()];
721
722 constexpr int as_index(vmSymbolID id) const {
723 int index = vmSymbols::as_int(id);
724 assert(0 <= index && index < int(sizeof(_class_map)), "must be");
725 return index;
726 }
727
728 constexpr void set_class_map(vmSymbolID id) {
729 _class_map[as_index(id)] = true;
730 }
731
732 public:
733 constexpr vmIntrinsicsLookup() : _class_map() {
734
735 #define VM_INTRINSIC_CLASS_MAP(id, klass, name, sig, fcode) \
736 set_class_map(SID_ENUM(klass));
737
738 VM_INTRINSICS_DO(VM_INTRINSIC_CLASS_MAP,
739 VM_SYMBOL_IGNORE, VM_SYMBOL_IGNORE, VM_SYMBOL_IGNORE, VM_ALIAS_IGNORE);
740 #undef VM_INTRINSIC_CLASS_MAP
741
742
743 // A few slightly irregular cases. See Method::init_intrinsic_id
744 set_class_map(SID_ENUM(java_lang_StrictMath));
745 set_class_map(SID_ENUM(java_lang_invoke_MethodHandle));
746 set_class_map(SID_ENUM(java_lang_invoke_VarHandle));
747 }
748
749 bool class_has_intrinsics(vmSymbolID holder) const {
750 return _class_map[as_index(holder)];
751 }
752 };
753
754 constexpr vmIntrinsicsLookup _intrinsics_lookup;
755
756 bool vmIntrinsics::class_has_intrinsics(vmSymbolID holder) {
757 return _intrinsics_lookup.class_has_intrinsics(holder);
758 }
759
760 const char* vmIntrinsics::short_name_as_C_string(vmIntrinsics::ID id, char* buf, int buflen) {
761 const char* str = name_at(id);
762 #ifndef PRODUCT
763 const char* kname = vmSymbols::name_for(class_for(id));
764 const char* mname = vmSymbols::name_for(name_for(id));
765 const char* sname = vmSymbols::name_for(signature_for(id));
766 const char* fname = "";
767 switch (flags_for(id)) {
768 case F_Y: fname = "synchronized "; break;
769 case F_RN: fname = "native "; break;
770 case F_SN: fname = "native static "; break;
771 case F_S: fname = "static "; break;
772 default: break;
773 }
774 const char* kptr = strrchr(kname, JVM_SIGNATURE_SLASH);
775 if (kptr != NULL) kname = kptr + 1;
776 int len = jio_snprintf(buf, buflen, "%s: %s%s.%s%s",
777 str, fname, kname, mname, sname);
778 if (len < buflen)
779 str = buf;
780 #endif //PRODUCT
781 return str;
782 }
783
784
785 // These are to get information about intrinsics.
786
787 #define ID4(x, y, z, f) ((ID3(x, y, z) << vmIntrinsics::log2_FLAG_LIMIT) | (jlong) (f))
788
789 #ifndef PRODUCT
790 static const jlong intrinsic_info_array[vmIntrinsics::number_of_intrinsics()+1] = {
791 #define VM_INTRINSIC_INFO(ignore_id, klass, name, sig, fcode) \
792 ID4(SID_ENUM(klass), SID_ENUM(name), SID_ENUM(sig), vmIntrinsics::fcode),
793
794 0, VM_INTRINSICS_DO(VM_INTRINSIC_INFO,
795 VM_SYMBOL_IGNORE, VM_SYMBOL_IGNORE, VM_SYMBOL_IGNORE, VM_ALIAS_IGNORE)
796 0
797 #undef VM_INTRINSIC_INFO
798 };
799
800 inline jlong intrinsic_info(vmIntrinsics::ID id) {
801 return intrinsic_info_array[vmIntrinsics::as_int(id)];
802 }
803
804 vmSymbolID vmIntrinsics::class_for(vmIntrinsics::ID id) {
805 jlong info = intrinsic_info(id);
806 int shift = 2*vmSymbols::log2_SID_LIMIT + log2_FLAG_LIMIT, mask = right_n_bits(vmSymbols::log2_SID_LIMIT);
807 assert(((ID4(1021,1022,1023,7) >> shift) & mask) == 1021, "");
808 return vmSymbols::as_SID( (info >> shift) & mask );
809 }
810
811 vmSymbolID vmIntrinsics::name_for(vmIntrinsics::ID id) {
812 jlong info = intrinsic_info(id);
813 int shift = vmSymbols::log2_SID_LIMIT + log2_FLAG_LIMIT, mask = right_n_bits(vmSymbols::log2_SID_LIMIT);
814 assert(((ID4(1021,1022,1023,7) >> shift) & mask) == 1022, "");
815 return vmSymbols::as_SID( (info >> shift) & mask );
816 }
817
818 vmSymbolID vmIntrinsics::signature_for(vmIntrinsics::ID id) {
819 jlong info = intrinsic_info(id);
820 int shift = log2_FLAG_LIMIT, mask = right_n_bits(vmSymbols::log2_SID_LIMIT);
821 assert(((ID4(1021,1022,1023,7) >> shift) & mask) == 1023, "");
822 return vmSymbols::as_SID( (info >> shift) & mask );
823 }
824
825 vmIntrinsics::Flags vmIntrinsics::flags_for(vmIntrinsics::ID id) {
826 jlong info = intrinsic_info(id);
827 int shift = 0, mask = right_n_bits(log2_FLAG_LIMIT);
828 assert(((ID4(1021,1022,1023,7) >> shift) & mask) == 7, "");
829 return Flags( (info >> shift) & mask );
830 }
831 #endif // !PRODUCT