1 /*
2 * Copyright (c) 1997, 2017, 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.h"
27 #include "classfile/vmSymbols.hpp"
28 #include "compiler/compilerDirectives.hpp"
29 #include "memory/oopFactory.hpp"
30 #include "memory/metaspaceClosure.hpp"
31 #include "oops/oop.inline.hpp"
32 #include "runtime/handles.inline.hpp"
33 #include "utilities/xmlstream.hpp"
34
35
36 Symbol* vmSymbols::_symbols[vmSymbols::SID_LIMIT];
37
38 Symbol* vmSymbols::_type_signatures[T_VOID+1] = { NULL /*, NULL...*/ };
39
40 inline int compare_symbol(const Symbol* a, const Symbol* b) {
41 if (a == b) return 0;
42 // follow the natural address order:
43 return (address)a > (address)b ? +1 : -1;
44 }
45
46 static vmSymbols::SID vm_symbol_index[vmSymbols::SID_LIMIT];
47 extern "C" {
48 static int compare_vmsymbol_sid(const void* void_a, const void* void_b) {
49 const Symbol* a = vmSymbols::symbol_at(*((vmSymbols::SID*) void_a));
50 const Symbol* b = vmSymbols::symbol_at(*((vmSymbols::SID*) void_b));
51 return compare_symbol(a, b);
52 }
53 }
54
55 #ifdef ASSERT
56 #define VM_SYMBOL_ENUM_NAME_BODY(name, string) #name "\0"
57 static const char* vm_symbol_enum_names =
58 VM_SYMBOLS_DO(VM_SYMBOL_ENUM_NAME_BODY, VM_ALIAS_IGNORE)
59 "\0";
60 static const char* vm_symbol_enum_name(vmSymbols::SID sid) {
61 const char* string = &vm_symbol_enum_names[0];
62 int skip = (int)sid - (int)vmSymbols::FIRST_SID;
63 for (; skip != 0; skip--) {
64 size_t skiplen = strlen(string);
65 if (skiplen == 0) return "<unknown>"; // overflow
66 string += skiplen+1;
67 }
68 return string;
69 }
70 #endif //ASSERT
71
72 // Put all the VM symbol strings in one place.
73 // Makes for a more compact libjvm.
74 #define VM_SYMBOL_BODY(name, string) string "\0"
75 static const char* vm_symbol_bodies = VM_SYMBOLS_DO(VM_SYMBOL_BODY, VM_ALIAS_IGNORE);
76
77 void vmSymbols::initialize(TRAPS) {
78 assert((int)SID_LIMIT <= (1<<log2_SID_LIMIT), "must fit in this bitfield");
79 assert((int)SID_LIMIT*5 > (1<<log2_SID_LIMIT), "make the bitfield smaller, please");
80 assert(vmIntrinsics::FLAG_LIMIT <= (1 << vmIntrinsics::log2_FLAG_LIMIT), "must fit in this bitfield");
81
82 if (!UseSharedSpaces) {
83 const char* string = &vm_symbol_bodies[0];
84 for (int index = (int)FIRST_SID; index < (int)SID_LIMIT; index++) {
85 Symbol* sym = SymbolTable::new_permanent_symbol(string, CHECK);
86 _symbols[index] = sym;
87 string += strlen(string); // skip string body
88 string += 1; // skip trailing null
89 }
90
91 _type_signatures[T_BYTE] = byte_signature();
92 _type_signatures[T_CHAR] = char_signature();
93 _type_signatures[T_DOUBLE] = double_signature();
94 _type_signatures[T_FLOAT] = float_signature();
95 _type_signatures[T_INT] = int_signature();
96 _type_signatures[T_LONG] = long_signature();
97 _type_signatures[T_SHORT] = short_signature();
98 _type_signatures[T_BOOLEAN] = bool_signature();
99 _type_signatures[T_VOID] = void_signature();
100 // no single signatures for T_OBJECT or T_ARRAY
101 #ifdef ASSERT
102 for (int i = (int)T_BOOLEAN; i < (int)T_VOID+1; i++) {
103 Symbol* s = _type_signatures[i];
104 if (s == NULL) continue;
105 BasicType st = signature_type(s);
106 assert(st == i, "");
107 }
108 #endif
109 }
110
111 #ifdef ASSERT
112 // Check for duplicates:
113 for (int i1 = (int)FIRST_SID; i1 < (int)SID_LIMIT; i1++) {
114 Symbol* sym = symbol_at((SID)i1);
115 for (int i2 = (int)FIRST_SID; i2 < i1; i2++) {
116 if (symbol_at((SID)i2) == sym) {
117 tty->print("*** Duplicate VM symbol SIDs %s(%d) and %s(%d): \"",
118 vm_symbol_enum_name((SID)i2), i2,
119 vm_symbol_enum_name((SID)i1), i1);
120 sym->print_symbol_on(tty);
121 tty->print_cr("\"");
122 }
123 }
124 }
125 #endif //ASSERT
126
127 // Create an index for find_id:
128 {
129 for (int index = (int)FIRST_SID; index < (int)SID_LIMIT; index++) {
130 vm_symbol_index[index] = (SID)index;
131 }
132 int num_sids = SID_LIMIT-FIRST_SID;
133 qsort(&vm_symbol_index[FIRST_SID], num_sids, sizeof(vm_symbol_index[0]),
134 compare_vmsymbol_sid);
135 }
136
137 #ifdef ASSERT
138 {
139 // Spot-check correspondence between strings, symbols, and enums:
140 assert(_symbols[NO_SID] == NULL, "must be");
141 const char* str = "java/lang/Object";
142 TempNewSymbol jlo = SymbolTable::new_permanent_symbol(str, CHECK);
143 assert(strncmp(str, (char*)jlo->base(), jlo->utf8_length()) == 0, "");
144 assert(jlo == java_lang_Object(), "");
145 SID sid = VM_SYMBOL_ENUM_NAME(java_lang_Object);
146 assert(find_sid(jlo) == sid, "");
147 assert(symbol_at(sid) == jlo, "");
148
149 // Make sure find_sid produces the right answer in each case.
150 for (int index = (int)FIRST_SID; index < (int)SID_LIMIT; index++) {
151 Symbol* sym = symbol_at((SID)index);
152 sid = find_sid(sym);
153 assert(sid == (SID)index, "symbol index works");
154 // Note: If there are duplicates, this assert will fail.
155 // A "Duplicate VM symbol" message will have already been printed.
156 }
157
158 // The string "format" happens (at the moment) not to be a vmSymbol,
159 // though it is a method name in java.lang.String.
160 str = "format";
161 TempNewSymbol fmt = SymbolTable::new_permanent_symbol(str, CHECK);
162 sid = find_sid(fmt);
163 assert(sid == NO_SID, "symbol index works (negative test)");
164 }
165 #endif
166 }
167
168
169 #ifndef PRODUCT
170 const char* vmSymbols::name_for(vmSymbols::SID sid) {
171 if (sid == NO_SID)
172 return "NO_SID";
173 const char* string = &vm_symbol_bodies[0];
174 for (int index = (int)FIRST_SID; index < (int)SID_LIMIT; index++) {
175 if (index == (int)sid)
176 return string;
177 string += strlen(string); // skip string body
178 string += 1; // skip trailing null
179 }
180 return "BAD_SID";
181 }
182 #endif
183
184
185
186 void vmSymbols::symbols_do(SymbolClosure* f) {
187 for (int index = (int)FIRST_SID; index < (int)SID_LIMIT; index++) {
188 f->do_symbol(&_symbols[index]);
189 }
190 for (int i = 0; i < T_VOID+1; i++) {
191 f->do_symbol(&_type_signatures[i]);
192 }
193 }
194
195 void vmSymbols::metaspace_pointers_do(MetaspaceClosure *it) {
196 for (int index = (int)FIRST_SID; index < (int)SID_LIMIT; index++) {
197 it->push(&_symbols[index]);
198 }
199 for (int i = 0; i < T_VOID+1; i++) {
200 it->push(&_type_signatures[i]);
201 }
202 }
203
204 void vmSymbols::serialize(SerializeClosure* soc) {
205 soc->do_region((u_char*)&_symbols[FIRST_SID],
206 (SID_LIMIT - FIRST_SID) * sizeof(_symbols[0]));
207 soc->do_region((u_char*)_type_signatures, sizeof(_type_signatures));
208 }
209
210
211 BasicType vmSymbols::signature_type(const Symbol* s) {
212 assert(s != NULL, "checking");
213 if (s->utf8_length() == 1) {
214 BasicType result = char2type(s->byte_at(0));
215 if (is_java_primitive(result) || result == T_VOID) {
216 assert(s == _type_signatures[result], "");
217 return result;
218 }
219 }
220 return T_OBJECT;
221 }
222
223
224 static int mid_hint = (int)vmSymbols::FIRST_SID+1;
225
226 #ifndef PRODUCT
227 static int find_sid_calls, find_sid_probes;
228 // (Typical counts are calls=7000 and probes=17000.)
229 #endif
230
231 vmSymbols::SID vmSymbols::find_sid(const Symbol* symbol) {
232 // Handle the majority of misses by a bounds check.
233 // Then, use a binary search over the index.
234 // Expected trip count is less than log2_SID_LIMIT, about eight.
235 // This is slow but acceptable, given that calls are not
236 // dynamically common. (Method*::intrinsic_id has a cache.)
237 NOT_PRODUCT(find_sid_calls++);
238 int min = (int)FIRST_SID, max = (int)SID_LIMIT - 1;
239 SID sid = NO_SID, sid1;
240 int cmp1;
241 sid1 = vm_symbol_index[min];
242 cmp1 = compare_symbol(symbol, symbol_at(sid1));
243 if (cmp1 <= 0) { // before the first
244 if (cmp1 == 0) sid = sid1;
245 } else {
246 sid1 = vm_symbol_index[max];
247 cmp1 = compare_symbol(symbol, symbol_at(sid1));
248 if (cmp1 >= 0) { // after the last
249 if (cmp1 == 0) sid = sid1;
250 } else {
251 // After checking the extremes, do a binary search.
252 ++min; --max; // endpoints are done
253 int mid = mid_hint; // start at previous success
254 while (max >= min) {
255 assert(mid >= min && mid <= max, "");
256 NOT_PRODUCT(find_sid_probes++);
257 sid1 = vm_symbol_index[mid];
258 cmp1 = compare_symbol(symbol, symbol_at(sid1));
259 if (cmp1 == 0) {
260 mid_hint = mid;
261 sid = sid1;
262 break;
263 }
264 if (cmp1 < 0)
265 max = mid - 1; // symbol < symbol_at(sid)
266 else
267 min = mid + 1;
268
269 // Pick a new probe point:
270 mid = (max + min) / 2;
271 }
272 }
273 }
274
275 #ifdef ASSERT
276 // Perform the exhaustive self-check the first 1000 calls,
277 // and every 100 calls thereafter.
278 static int find_sid_check_count = -2000;
279 if ((uint)++find_sid_check_count > (uint)100) {
280 if (find_sid_check_count > 0) find_sid_check_count = 0;
281
282 // Make sure this is the right answer, using linear search.
283 // (We have already proven that there are no duplicates in the list.)
284 SID sid2 = NO_SID;
285 for (int index = (int)FIRST_SID; index < (int)SID_LIMIT; index++) {
286 Symbol* sym2 = symbol_at((SID)index);
287 if (sym2 == symbol) {
288 sid2 = (SID)index;
289 break;
290 }
291 }
292 // Unless it's a duplicate, assert that the sids are the same.
293 if (_symbols[sid] != _symbols[sid2]) {
294 assert(sid == sid2, "binary same as linear search");
295 }
296 }
297 #endif //ASSERT
298
299 return sid;
300 }
301
302 vmSymbols::SID vmSymbols::find_sid(const char* symbol_name) {
303 Symbol* symbol = SymbolTable::probe(symbol_name, (int) strlen(symbol_name));
304 if (symbol == NULL) return NO_SID;
305 return find_sid(symbol);
306 }
307
308 static vmIntrinsics::ID wrapper_intrinsic(BasicType type, bool unboxing) {
309 #define TYPE2(type, unboxing) ((int)(type)*2 + ((unboxing) ? 1 : 0))
310 switch (TYPE2(type, unboxing)) {
311 #define BASIC_TYPE_CASE(type, box, unbox) \
312 case TYPE2(type, false): return vmIntrinsics::box; \
313 case TYPE2(type, true): return vmIntrinsics::unbox
314 BASIC_TYPE_CASE(T_BOOLEAN, _Boolean_valueOf, _booleanValue);
315 BASIC_TYPE_CASE(T_BYTE, _Byte_valueOf, _byteValue);
316 BASIC_TYPE_CASE(T_CHAR, _Character_valueOf, _charValue);
317 BASIC_TYPE_CASE(T_SHORT, _Short_valueOf, _shortValue);
318 BASIC_TYPE_CASE(T_INT, _Integer_valueOf, _intValue);
319 BASIC_TYPE_CASE(T_LONG, _Long_valueOf, _longValue);
320 BASIC_TYPE_CASE(T_FLOAT, _Float_valueOf, _floatValue);
321 BASIC_TYPE_CASE(T_DOUBLE, _Double_valueOf, _doubleValue);
322 #undef BASIC_TYPE_CASE
323 }
324 #undef TYPE2
325 return vmIntrinsics::_none;
326 }
327
328 vmIntrinsics::ID vmIntrinsics::for_boxing(BasicType type) {
329 return wrapper_intrinsic(type, false);
330 }
331 vmIntrinsics::ID vmIntrinsics::for_unboxing(BasicType type) {
332 return wrapper_intrinsic(type, true);
333 }
334
335 vmIntrinsics::ID vmIntrinsics::for_raw_conversion(BasicType src, BasicType dest) {
336 #define SRC_DEST(s,d) (((int)(s) << 4) + (int)(d))
337 switch (SRC_DEST(src, dest)) {
338 case SRC_DEST(T_INT, T_FLOAT): return vmIntrinsics::_intBitsToFloat;
339 case SRC_DEST(T_FLOAT, T_INT): return vmIntrinsics::_floatToRawIntBits;
340
341 case SRC_DEST(T_LONG, T_DOUBLE): return vmIntrinsics::_longBitsToDouble;
342 case SRC_DEST(T_DOUBLE, T_LONG): return vmIntrinsics::_doubleToRawLongBits;
343 }
344 #undef SRC_DEST
345
346 return vmIntrinsics::_none;
347 }
348
349 bool vmIntrinsics::preserves_state(vmIntrinsics::ID id) {
350 assert(id != vmIntrinsics::_none, "must be a VM intrinsic");
351 switch(id) {
352 #ifdef TRACE_HAVE_INTRINSICS
353 case vmIntrinsics::_counterTime:
354 #endif
355 case vmIntrinsics::_currentTimeMillis:
356 case vmIntrinsics::_nanoTime:
357 case vmIntrinsics::_floatToRawIntBits:
358 case vmIntrinsics::_intBitsToFloat:
359 case vmIntrinsics::_doubleToRawLongBits:
360 case vmIntrinsics::_longBitsToDouble:
361 case vmIntrinsics::_getClass:
362 case vmIntrinsics::_isInstance:
363 case vmIntrinsics::_currentThread:
364 case vmIntrinsics::_dabs:
365 case vmIntrinsics::_dsqrt:
366 case vmIntrinsics::_dsin:
367 case vmIntrinsics::_dcos:
368 case vmIntrinsics::_dtan:
369 case vmIntrinsics::_dlog:
370 case vmIntrinsics::_dlog10:
371 case vmIntrinsics::_dexp:
372 case vmIntrinsics::_dpow:
373 case vmIntrinsics::_checkIndex:
374 case vmIntrinsics::_Reference_get:
375 case vmIntrinsics::_updateCRC32:
376 case vmIntrinsics::_updateBytesCRC32:
377 case vmIntrinsics::_updateByteBufferCRC32:
378 case vmIntrinsics::_vectorizedMismatch:
379 case vmIntrinsics::_fmaD:
380 case vmIntrinsics::_fmaF:
381 return true;
382 default:
383 return false;
384 }
385 }
386
387 bool vmIntrinsics::can_trap(vmIntrinsics::ID id) {
388 assert(id != vmIntrinsics::_none, "must be a VM intrinsic");
389 switch(id) {
390 #ifdef TRACE_HAVE_INTRINSICS
391 case vmIntrinsics::_counterTime:
392 case vmIntrinsics::_getClassId:
393 #endif
394 case vmIntrinsics::_currentTimeMillis:
395 case vmIntrinsics::_nanoTime:
396 case vmIntrinsics::_floatToRawIntBits:
397 case vmIntrinsics::_intBitsToFloat:
398 case vmIntrinsics::_doubleToRawLongBits:
399 case vmIntrinsics::_longBitsToDouble:
400 case vmIntrinsics::_currentThread:
401 case vmIntrinsics::_dabs:
402 case vmIntrinsics::_dsqrt:
403 case vmIntrinsics::_dsin:
404 case vmIntrinsics::_dcos:
405 case vmIntrinsics::_dtan:
406 case vmIntrinsics::_dlog:
407 case vmIntrinsics::_dlog10:
408 case vmIntrinsics::_dexp:
409 case vmIntrinsics::_dpow:
410 case vmIntrinsics::_updateCRC32:
411 case vmIntrinsics::_updateBytesCRC32:
412 case vmIntrinsics::_updateByteBufferCRC32:
413 case vmIntrinsics::_vectorizedMismatch:
414 case vmIntrinsics::_fmaD:
415 case vmIntrinsics::_fmaF:
416 return false;
417 default:
418 return true;
419 }
420 }
421
422 // Some intrinsics produce different results if they are not pinned
423 bool vmIntrinsics::should_be_pinned(vmIntrinsics::ID id) {
424 assert(id != vmIntrinsics::_none, "must be a VM intrinsic");
425 switch(id) {
426 #ifdef TRACE_HAVE_INTRINSICS
427 case vmIntrinsics::_counterTime:
428 #endif
429 case vmIntrinsics::_currentTimeMillis:
430 case vmIntrinsics::_nanoTime:
431 return true;
432 default:
433 return false;
434 }
435 }
436
437 bool vmIntrinsics::does_virtual_dispatch(vmIntrinsics::ID id) {
438 assert(id != vmIntrinsics::_none, "must be a VM intrinsic");
439 switch(id) {
440 case vmIntrinsics::_hashCode:
441 case vmIntrinsics::_clone:
442 return true;
443 break;
444 default:
445 return false;
446 }
447 }
448
449 int vmIntrinsics::predicates_needed(vmIntrinsics::ID id) {
450 assert(id != vmIntrinsics::_none, "must be a VM intrinsic");
451 switch (id) {
452 case vmIntrinsics::_cipherBlockChaining_encryptAESCrypt:
453 case vmIntrinsics::_cipherBlockChaining_decryptAESCrypt:
454 case vmIntrinsics::_counterMode_AESCrypt:
455 return 1;
456 case vmIntrinsics::_digestBase_implCompressMB:
457 return 3;
458 default:
459 return 0;
460 }
461 }
462
463 bool vmIntrinsics::is_intrinsic_available(vmIntrinsics::ID id) {
464 return !vmIntrinsics::is_intrinsic_disabled(id) &&
465 !vmIntrinsics::is_disabled_by_flags(id);
466 }
467
468 bool vmIntrinsics::is_intrinsic_disabled(vmIntrinsics::ID id) {
469 assert(id != vmIntrinsics::_none, "must be a VM intrinsic");
470
471 // Canonicalize DisableIntrinsic to contain only ',' as a separator.
472 // Note, DirectiveSet may not be created at this point yet since this code
473 // is called from initial stub geenration code.
474 char* local_list = (char*)DirectiveSet::canonicalize_disableintrinsic(DisableIntrinsic);
475
476 bool found = false;
477 char* token = strtok(local_list, ",");
478 while (token != NULL) {
479 if (strcmp(token, vmIntrinsics::name_at(id)) == 0) {
480 found = true;
481 break;
482 } else {
483 token = strtok(NULL, ",");
484 }
485 }
486
487 FREE_C_HEAP_ARRAY(char, local_list);
488 return found;
489 }
490
491
492 bool vmIntrinsics::is_disabled_by_flags(const methodHandle& method) {
493 vmIntrinsics::ID id = method->intrinsic_id();
494 assert(id != vmIntrinsics::_none, "must be a VM intrinsic");
495 return is_disabled_by_flags(id);
496 }
497
498 bool vmIntrinsics::is_disabled_by_flags(vmIntrinsics::ID id) {
499 assert(id != vmIntrinsics::_none, "must be a VM intrinsic");
500
501 // -XX:-InlineNatives disables nearly all intrinsics except the ones listed in
502 // the following switch statement.
503 if (!InlineNatives) {
504 switch (id) {
505 case vmIntrinsics::_indexOfL:
506 case vmIntrinsics::_indexOfU:
507 case vmIntrinsics::_indexOfUL:
508 case vmIntrinsics::_indexOfIL:
509 case vmIntrinsics::_indexOfIU:
510 case vmIntrinsics::_indexOfIUL:
511 case vmIntrinsics::_indexOfU_char:
512 case vmIntrinsics::_compareToL:
513 case vmIntrinsics::_compareToU:
514 case vmIntrinsics::_compareToLU:
515 case vmIntrinsics::_compareToUL:
516 case vmIntrinsics::_equalsL:
517 case vmIntrinsics::_equalsU:
518 case vmIntrinsics::_equalsC:
519 case vmIntrinsics::_getCharStringU:
520 case vmIntrinsics::_putCharStringU:
521 case vmIntrinsics::_compressStringC:
522 case vmIntrinsics::_compressStringB:
523 case vmIntrinsics::_inflateStringC:
524 case vmIntrinsics::_inflateStringB:
525 case vmIntrinsics::_getAndAddInt:
526 case vmIntrinsics::_getAndAddLong:
527 case vmIntrinsics::_getAndSetInt:
528 case vmIntrinsics::_getAndSetLong:
529 case vmIntrinsics::_getAndSetObject:
530 case vmIntrinsics::_loadFence:
531 case vmIntrinsics::_storeFence:
532 case vmIntrinsics::_fullFence:
533 case vmIntrinsics::_hasNegatives:
534 case vmIntrinsics::_Reference_get:
535 break;
536 default:
537 return true;
538 }
539 }
540
541 switch (id) {
542 case vmIntrinsics::_isInstance:
543 case vmIntrinsics::_isAssignableFrom:
544 case vmIntrinsics::_getModifiers:
545 case vmIntrinsics::_isInterface:
546 case vmIntrinsics::_isArray:
547 case vmIntrinsics::_isPrimitive:
548 case vmIntrinsics::_getSuperclass:
549 case vmIntrinsics::_Class_cast:
550 case vmIntrinsics::_getLength:
551 case vmIntrinsics::_newArray:
552 case vmIntrinsics::_getClass:
553 if (!InlineClassNatives) return true;
554 break;
555 case vmIntrinsics::_currentThread:
556 case vmIntrinsics::_isInterrupted:
557 if (!InlineThreadNatives) return true;
558 break;
559 case vmIntrinsics::_floatToRawIntBits:
560 case vmIntrinsics::_intBitsToFloat:
561 case vmIntrinsics::_doubleToRawLongBits:
562 case vmIntrinsics::_longBitsToDouble:
563 case vmIntrinsics::_dabs:
564 case vmIntrinsics::_dsqrt:
565 case vmIntrinsics::_dsin:
566 case vmIntrinsics::_dcos:
567 case vmIntrinsics::_dtan:
568 case vmIntrinsics::_dlog:
569 case vmIntrinsics::_dexp:
570 case vmIntrinsics::_dpow:
571 case vmIntrinsics::_dlog10:
572 case vmIntrinsics::_datan2:
573 case vmIntrinsics::_min:
574 case vmIntrinsics::_max:
575 case vmIntrinsics::_floatToIntBits:
576 case vmIntrinsics::_doubleToLongBits:
577 if (!InlineMathNatives) return true;
578 break;
579 case vmIntrinsics::_fmaD:
580 case vmIntrinsics::_fmaF:
581 if (!InlineMathNatives || !UseFMA) return true;
582 break;
583 case vmIntrinsics::_arraycopy:
584 if (!InlineArrayCopy) return true;
585 break;
586 case vmIntrinsics::_updateCRC32:
587 case vmIntrinsics::_updateBytesCRC32:
588 case vmIntrinsics::_updateByteBufferCRC32:
589 if (!UseCRC32Intrinsics) return true;
590 break;
591 case vmIntrinsics::_getObject:
592 case vmIntrinsics::_getBoolean:
593 case vmIntrinsics::_getByte:
594 case vmIntrinsics::_getShort:
595 case vmIntrinsics::_getChar:
596 case vmIntrinsics::_getInt:
597 case vmIntrinsics::_getLong:
598 case vmIntrinsics::_getFloat:
599 case vmIntrinsics::_getDouble:
600 case vmIntrinsics::_putObject:
601 case vmIntrinsics::_putBoolean:
602 case vmIntrinsics::_putByte:
603 case vmIntrinsics::_putShort:
604 case vmIntrinsics::_putChar:
605 case vmIntrinsics::_putInt:
606 case vmIntrinsics::_putLong:
607 case vmIntrinsics::_putFloat:
608 case vmIntrinsics::_putDouble:
609 case vmIntrinsics::_getObjectVolatile:
610 case vmIntrinsics::_getBooleanVolatile:
611 case vmIntrinsics::_getByteVolatile:
612 case vmIntrinsics::_getShortVolatile:
613 case vmIntrinsics::_getCharVolatile:
614 case vmIntrinsics::_getIntVolatile:
615 case vmIntrinsics::_getLongVolatile:
616 case vmIntrinsics::_getFloatVolatile:
617 case vmIntrinsics::_getDoubleVolatile:
618 case vmIntrinsics::_putObjectVolatile:
619 case vmIntrinsics::_putBooleanVolatile:
620 case vmIntrinsics::_putByteVolatile:
621 case vmIntrinsics::_putShortVolatile:
622 case vmIntrinsics::_putCharVolatile:
623 case vmIntrinsics::_putIntVolatile:
624 case vmIntrinsics::_putLongVolatile:
625 case vmIntrinsics::_putFloatVolatile:
626 case vmIntrinsics::_putDoubleVolatile:
627 case vmIntrinsics::_getObjectAcquire:
628 case vmIntrinsics::_getBooleanAcquire:
629 case vmIntrinsics::_getByteAcquire:
630 case vmIntrinsics::_getShortAcquire:
631 case vmIntrinsics::_getCharAcquire:
632 case vmIntrinsics::_getIntAcquire:
633 case vmIntrinsics::_getLongAcquire:
634 case vmIntrinsics::_getFloatAcquire:
635 case vmIntrinsics::_getDoubleAcquire:
636 case vmIntrinsics::_putObjectRelease:
637 case vmIntrinsics::_putBooleanRelease:
638 case vmIntrinsics::_putByteRelease:
639 case vmIntrinsics::_putShortRelease:
640 case vmIntrinsics::_putCharRelease:
641 case vmIntrinsics::_putIntRelease:
642 case vmIntrinsics::_putLongRelease:
643 case vmIntrinsics::_putFloatRelease:
644 case vmIntrinsics::_putDoubleRelease:
645 case vmIntrinsics::_getObjectOpaque:
646 case vmIntrinsics::_getBooleanOpaque:
647 case vmIntrinsics::_getByteOpaque:
648 case vmIntrinsics::_getShortOpaque:
649 case vmIntrinsics::_getCharOpaque:
650 case vmIntrinsics::_getIntOpaque:
651 case vmIntrinsics::_getLongOpaque:
652 case vmIntrinsics::_getFloatOpaque:
653 case vmIntrinsics::_getDoubleOpaque:
654 case vmIntrinsics::_putObjectOpaque:
655 case vmIntrinsics::_putBooleanOpaque:
656 case vmIntrinsics::_putByteOpaque:
657 case vmIntrinsics::_putShortOpaque:
658 case vmIntrinsics::_putCharOpaque:
659 case vmIntrinsics::_putIntOpaque:
660 case vmIntrinsics::_putLongOpaque:
661 case vmIntrinsics::_putFloatOpaque:
662 case vmIntrinsics::_putDoubleOpaque:
663 case vmIntrinsics::_getAndAddInt:
664 case vmIntrinsics::_getAndAddLong:
665 case vmIntrinsics::_getAndSetInt:
666 case vmIntrinsics::_getAndSetLong:
667 case vmIntrinsics::_getAndSetObject:
668 case vmIntrinsics::_loadFence:
669 case vmIntrinsics::_storeFence:
670 case vmIntrinsics::_fullFence:
671 case vmIntrinsics::_compareAndSetLong:
672 case vmIntrinsics::_weakCompareAndSetLong:
673 case vmIntrinsics::_weakCompareAndSetLongPlain:
674 case vmIntrinsics::_weakCompareAndSetLongAcquire:
675 case vmIntrinsics::_weakCompareAndSetLongRelease:
676 case vmIntrinsics::_compareAndSetInt:
677 case vmIntrinsics::_weakCompareAndSetInt:
678 case vmIntrinsics::_weakCompareAndSetIntPlain:
679 case vmIntrinsics::_weakCompareAndSetIntAcquire:
680 case vmIntrinsics::_weakCompareAndSetIntRelease:
681 case vmIntrinsics::_compareAndSetObject:
682 case vmIntrinsics::_weakCompareAndSetObject:
683 case vmIntrinsics::_weakCompareAndSetObjectPlain:
684 case vmIntrinsics::_weakCompareAndSetObjectAcquire:
685 case vmIntrinsics::_weakCompareAndSetObjectRelease:
686 case vmIntrinsics::_compareAndExchangeInt:
687 case vmIntrinsics::_compareAndExchangeIntAcquire:
688 case vmIntrinsics::_compareAndExchangeIntRelease:
689 case vmIntrinsics::_compareAndExchangeLong:
690 case vmIntrinsics::_compareAndExchangeLongAcquire:
691 case vmIntrinsics::_compareAndExchangeLongRelease:
692 case vmIntrinsics::_compareAndExchangeObject:
693 case vmIntrinsics::_compareAndExchangeObjectAcquire:
694 case vmIntrinsics::_compareAndExchangeObjectRelease:
695 if (!InlineUnsafeOps) return true;
696 break;
697 case vmIntrinsics::_getShortUnaligned:
698 case vmIntrinsics::_getCharUnaligned:
699 case vmIntrinsics::_getIntUnaligned:
700 case vmIntrinsics::_getLongUnaligned:
701 case vmIntrinsics::_putShortUnaligned:
702 case vmIntrinsics::_putCharUnaligned:
703 case vmIntrinsics::_putIntUnaligned:
704 case vmIntrinsics::_putLongUnaligned:
705 case vmIntrinsics::_allocateInstance:
706 if (!InlineUnsafeOps || !UseUnalignedAccesses) return true;
707 break;
708 case vmIntrinsics::_hashCode:
709 if (!InlineObjectHash) return true;
710 break;
711 case vmIntrinsics::_aescrypt_encryptBlock:
712 case vmIntrinsics::_aescrypt_decryptBlock:
713 if (!UseAESIntrinsics) return true;
714 break;
715 case vmIntrinsics::_cipherBlockChaining_encryptAESCrypt:
716 case vmIntrinsics::_cipherBlockChaining_decryptAESCrypt:
717 if (!UseAESIntrinsics) return true;
718 break;
719 case vmIntrinsics::_counterMode_AESCrypt:
720 if (!UseAESCTRIntrinsics) return true;
721 break;
722 case vmIntrinsics::_sha_implCompress:
723 if (!UseSHA1Intrinsics) return true;
724 break;
725 case vmIntrinsics::_sha2_implCompress:
726 if (!UseSHA256Intrinsics) return true;
727 break;
728 case vmIntrinsics::_sha5_implCompress:
729 if (!UseSHA512Intrinsics) return true;
730 break;
731 case vmIntrinsics::_digestBase_implCompressMB:
732 if (!(UseSHA1Intrinsics || UseSHA256Intrinsics || UseSHA512Intrinsics)) return true;
733 break;
734 case vmIntrinsics::_ghash_processBlocks:
735 if (!UseGHASHIntrinsics) return true;
736 break;
737 case vmIntrinsics::_updateBytesCRC32C:
738 case vmIntrinsics::_updateDirectByteBufferCRC32C:
739 if (!UseCRC32CIntrinsics) return true;
740 break;
741 case vmIntrinsics::_vectorizedMismatch:
742 if (!UseVectorizedMismatchIntrinsic) return true;
743 break;
744 case vmIntrinsics::_updateBytesAdler32:
745 case vmIntrinsics::_updateByteBufferAdler32:
746 if (!UseAdler32Intrinsics) return true;
747 break;
748 case vmIntrinsics::_copyMemory:
749 if (!InlineArrayCopy || !InlineUnsafeOps) return true;
750 break;
751 #ifdef COMPILER1
752 case vmIntrinsics::_checkIndex:
753 if (!InlineNIOCheckIndex) return true;
754 break;
755 #endif // COMPILER1
756 #ifdef COMPILER2
757 case vmIntrinsics::_clone:
758 case vmIntrinsics::_copyOf:
759 case vmIntrinsics::_copyOfRange:
760 // These intrinsics use both the objectcopy and the arraycopy
761 // intrinsic mechanism.
762 if (!InlineObjectCopy || !InlineArrayCopy) return true;
763 break;
764 case vmIntrinsics::_compareToL:
765 case vmIntrinsics::_compareToU:
766 case vmIntrinsics::_compareToLU:
767 case vmIntrinsics::_compareToUL:
768 if (!SpecialStringCompareTo) return true;
769 break;
770 case vmIntrinsics::_indexOfL:
771 case vmIntrinsics::_indexOfU:
772 case vmIntrinsics::_indexOfUL:
773 case vmIntrinsics::_indexOfIL:
774 case vmIntrinsics::_indexOfIU:
775 case vmIntrinsics::_indexOfIUL:
776 case vmIntrinsics::_indexOfU_char:
777 if (!SpecialStringIndexOf) return true;
778 break;
779 case vmIntrinsics::_equalsL:
780 case vmIntrinsics::_equalsU:
781 if (!SpecialStringEquals) return true;
782 break;
783 case vmIntrinsics::_equalsB:
784 case vmIntrinsics::_equalsC:
785 if (!SpecialArraysEquals) return true;
786 break;
787 case vmIntrinsics::_encodeISOArray:
788 case vmIntrinsics::_encodeByteISOArray:
789 if (!SpecialEncodeISOArray) return true;
790 break;
791 case vmIntrinsics::_getCallerClass:
792 if (!InlineReflectionGetCallerClass) return true;
793 break;
794 case vmIntrinsics::_multiplyToLen:
795 if (!UseMultiplyToLenIntrinsic) return true;
796 break;
797 case vmIntrinsics::_squareToLen:
798 if (!UseSquareToLenIntrinsic) return true;
799 break;
800 case vmIntrinsics::_mulAdd:
801 if (!UseMulAddIntrinsic) return true;
802 break;
803 case vmIntrinsics::_montgomeryMultiply:
804 if (!UseMontgomeryMultiplyIntrinsic) return true;
805 break;
806 case vmIntrinsics::_montgomerySquare:
807 if (!UseMontgomerySquareIntrinsic) return true;
808 break;
809 case vmIntrinsics::_addExactI:
810 case vmIntrinsics::_addExactL:
811 case vmIntrinsics::_decrementExactI:
812 case vmIntrinsics::_decrementExactL:
813 case vmIntrinsics::_incrementExactI:
814 case vmIntrinsics::_incrementExactL:
815 case vmIntrinsics::_multiplyExactI:
816 case vmIntrinsics::_multiplyExactL:
817 case vmIntrinsics::_negateExactI:
818 case vmIntrinsics::_negateExactL:
819 case vmIntrinsics::_subtractExactI:
820 case vmIntrinsics::_subtractExactL:
821 if (!UseMathExactIntrinsics || !InlineMathNatives) return true;
822 break;
823 #endif // COMPILER2
824 default:
825 return false;
826 }
827
828 return false;
829 }
830
831 #define VM_INTRINSIC_INITIALIZE(id, klass, name, sig, flags) #id "\0"
832 static const char* vm_intrinsic_name_bodies =
833 VM_INTRINSICS_DO(VM_INTRINSIC_INITIALIZE,
834 VM_SYMBOL_IGNORE, VM_SYMBOL_IGNORE, VM_SYMBOL_IGNORE, VM_ALIAS_IGNORE);
835
836 static const char* vm_intrinsic_name_table[vmIntrinsics::ID_LIMIT];
837
838 const char* vmIntrinsics::name_at(vmIntrinsics::ID id) {
839 const char** nt = &vm_intrinsic_name_table[0];
840 if (nt[_none] == NULL) {
841 char* string = (char*) &vm_intrinsic_name_bodies[0];
842 for (int index = FIRST_ID; index < ID_LIMIT; index++) {
843 nt[index] = string;
844 string += strlen(string); // skip string body
845 string += 1; // skip trailing null
846 }
847 assert(!strcmp(nt[_hashCode], "_hashCode"), "lined up");
848 nt[_none] = "_none";
849 }
850 if ((uint)id < (uint)ID_LIMIT)
851 return vm_intrinsic_name_table[(uint)id];
852 else
853 return "(unknown intrinsic)";
854 }
855
856 // These are flag-matching functions:
857 inline bool match_F_R(jshort flags) {
858 const int req = 0;
859 const int neg = JVM_ACC_STATIC | JVM_ACC_SYNCHRONIZED;
860 return (flags & (req | neg)) == req;
861 }
862 inline bool match_F_Y(jshort flags) {
863 const int req = JVM_ACC_SYNCHRONIZED;
864 const int neg = JVM_ACC_STATIC;
865 return (flags & (req | neg)) == req;
866 }
867 inline bool match_F_RN(jshort flags) {
868 const int req = JVM_ACC_NATIVE;
869 const int neg = JVM_ACC_STATIC | JVM_ACC_SYNCHRONIZED;
870 return (flags & (req | neg)) == req;
871 }
872 inline bool match_F_S(jshort flags) {
873 const int req = JVM_ACC_STATIC;
874 const int neg = JVM_ACC_SYNCHRONIZED;
875 return (flags & (req | neg)) == req;
876 }
877 inline bool match_F_SN(jshort flags) {
878 const int req = JVM_ACC_STATIC | JVM_ACC_NATIVE;
879 const int neg = JVM_ACC_SYNCHRONIZED;
880 return (flags & (req | neg)) == req;
881 }
882 inline bool match_F_RNY(jshort flags) {
883 const int req = JVM_ACC_NATIVE | JVM_ACC_SYNCHRONIZED;
884 const int neg = JVM_ACC_STATIC;
885 return (flags & (req | neg)) == req;
886 }
887
888 // These are for forming case labels:
889 #define ID3(x, y, z) (( jlong)(z) + \
890 ((jlong)(y) << vmSymbols::log2_SID_LIMIT) + \
891 ((jlong)(x) << (2*vmSymbols::log2_SID_LIMIT)) )
892 #define SID_ENUM(n) vmSymbols::VM_SYMBOL_ENUM_NAME(n)
893
894 vmIntrinsics::ID vmIntrinsics::find_id_impl(vmSymbols::SID holder,
895 vmSymbols::SID name,
896 vmSymbols::SID sig,
897 jshort flags) {
898 assert((int)vmSymbols::SID_LIMIT <= (1<<vmSymbols::log2_SID_LIMIT), "must fit");
899
900 // Let the C compiler build the decision tree.
901
902 #define VM_INTRINSIC_CASE(id, klass, name, sig, fcode) \
903 case ID3(SID_ENUM(klass), SID_ENUM(name), SID_ENUM(sig)): \
904 if (!match_##fcode(flags)) break; \
905 return id;
906
907 switch (ID3(holder, name, sig)) {
908 VM_INTRINSICS_DO(VM_INTRINSIC_CASE,
909 VM_SYMBOL_IGNORE, VM_SYMBOL_IGNORE, VM_SYMBOL_IGNORE, VM_ALIAS_IGNORE);
910 }
911 return vmIntrinsics::_none;
912
913 #undef VM_INTRINSIC_CASE
914 }
915
916
917 const char* vmIntrinsics::short_name_as_C_string(vmIntrinsics::ID id, char* buf, int buflen) {
918 const char* str = name_at(id);
919 #ifndef PRODUCT
920 const char* kname = vmSymbols::name_for(class_for(id));
921 const char* mname = vmSymbols::name_for(name_for(id));
922 const char* sname = vmSymbols::name_for(signature_for(id));
923 const char* fname = "";
924 switch (flags_for(id)) {
925 case F_Y: fname = "synchronized "; break;
926 case F_RN: fname = "native "; break;
927 case F_SN: fname = "native static "; break;
928 case F_S: fname = "static "; break;
929 case F_RNY:fname = "native synchronized "; break;
930 default: break;
931 }
932 const char* kptr = strrchr(kname, '/');
933 if (kptr != NULL) kname = kptr + 1;
934 int len = jio_snprintf(buf, buflen, "%s: %s%s.%s%s",
935 str, fname, kname, mname, sname);
936 if (len < buflen)
937 str = buf;
938 #endif //PRODUCT
939 return str;
940 }
941
942
943 // These are to get information about intrinsics.
944
945 #define ID4(x, y, z, f) ((ID3(x, y, z) << vmIntrinsics::log2_FLAG_LIMIT) | (jlong) (f))
946
947 static const jlong intrinsic_info_array[vmIntrinsics::ID_LIMIT+1] = {
948 #define VM_INTRINSIC_INFO(ignore_id, klass, name, sig, fcode) \
949 ID4(SID_ENUM(klass), SID_ENUM(name), SID_ENUM(sig), vmIntrinsics::fcode),
950
951 0, VM_INTRINSICS_DO(VM_INTRINSIC_INFO,
952 VM_SYMBOL_IGNORE, VM_SYMBOL_IGNORE, VM_SYMBOL_IGNORE, VM_ALIAS_IGNORE)
953 0
954 #undef VM_INTRINSIC_INFO
955 };
956
957 inline jlong intrinsic_info(vmIntrinsics::ID id) {
958 return intrinsic_info_array[vmIntrinsics::ID_from((int)id)];
959 }
960
961 vmSymbols::SID vmIntrinsics::class_for(vmIntrinsics::ID id) {
962 jlong info = intrinsic_info(id);
963 int shift = 2*vmSymbols::log2_SID_LIMIT + log2_FLAG_LIMIT, mask = right_n_bits(vmSymbols::log2_SID_LIMIT);
964 assert(((ID4(1021,1022,1023,15) >> shift) & mask) == 1021, "");
965 return vmSymbols::SID( (info >> shift) & mask );
966 }
967
968 vmSymbols::SID vmIntrinsics::name_for(vmIntrinsics::ID id) {
969 jlong info = intrinsic_info(id);
970 int shift = vmSymbols::log2_SID_LIMIT + log2_FLAG_LIMIT, mask = right_n_bits(vmSymbols::log2_SID_LIMIT);
971 assert(((ID4(1021,1022,1023,15) >> shift) & mask) == 1022, "");
972 return vmSymbols::SID( (info >> shift) & mask );
973 }
974
975 vmSymbols::SID vmIntrinsics::signature_for(vmIntrinsics::ID id) {
976 jlong info = intrinsic_info(id);
977 int shift = log2_FLAG_LIMIT, mask = right_n_bits(vmSymbols::log2_SID_LIMIT);
978 assert(((ID4(1021,1022,1023,15) >> shift) & mask) == 1023, "");
979 return vmSymbols::SID( (info >> shift) & mask );
980 }
981
982 vmIntrinsics::Flags vmIntrinsics::flags_for(vmIntrinsics::ID id) {
983 jlong info = intrinsic_info(id);
984 int shift = 0, mask = right_n_bits(log2_FLAG_LIMIT);
985 assert(((ID4(1021,1022,1023,15) >> shift) & mask) == 15, "");
986 return Flags( (info >> shift) & mask );
987 }
988
989
990 #ifndef PRODUCT
991 // verify_method performs an extra check on a matched intrinsic method
992
993 static bool match_method(Method* m, Symbol* n, Symbol* s) {
994 return (m->name() == n &&
995 m->signature() == s);
996 }
997
998 static vmIntrinsics::ID match_method_with_klass(Method* m, Symbol* mk) {
999 #define VM_INTRINSIC_MATCH(id, klassname, namepart, sigpart, flags) \
1000 { Symbol* k = vmSymbols::klassname(); \
1001 if (mk == k) { \
1002 Symbol* n = vmSymbols::namepart(); \
1003 Symbol* s = vmSymbols::sigpart(); \
1004 if (match_method(m, n, s)) \
1005 return vmIntrinsics::id; \
1006 } }
1007 VM_INTRINSICS_DO(VM_INTRINSIC_MATCH,
1008 VM_SYMBOL_IGNORE, VM_SYMBOL_IGNORE, VM_SYMBOL_IGNORE, VM_ALIAS_IGNORE);
1009 return vmIntrinsics::_none;
1010 #undef VM_INTRINSIC_MATCH
1011 }
1012
1013 void vmIntrinsics::verify_method(ID actual_id, Method* m) {
1014 Symbol* mk = m->method_holder()->name();
1015 ID declared_id = match_method_with_klass(m, mk);
1016
1017 if (declared_id == actual_id) return; // success
1018
1019 if (declared_id == _none && actual_id != _none && mk == vmSymbols::java_lang_StrictMath()) {
1020 // Here are a few special cases in StrictMath not declared in vmSymbols.hpp.
1021 switch (actual_id) {
1022 case _min:
1023 case _max:
1024 case _dsqrt:
1025 declared_id = match_method_with_klass(m, vmSymbols::java_lang_Math());
1026 if (declared_id == actual_id) return; // acceptable alias
1027 break;
1028 default:
1029 break;
1030 }
1031 }
1032
1033 const char* declared_name = name_at(declared_id);
1034 const char* actual_name = name_at(actual_id);
1035 methodHandle mh = m;
1036 m = NULL;
1037 ttyLocker ttyl;
1038 if (xtty != NULL) {
1039 xtty->begin_elem("intrinsic_misdeclared actual='%s' declared='%s'",
1040 actual_name, declared_name);
1041 xtty->method(mh);
1042 xtty->end_elem("%s", "");
1043 }
1044 if (PrintMiscellaneous && (WizardMode || Verbose)) {
1045 tty->print_cr("*** misidentified method; %s(%d) should be %s(%d):",
1046 declared_name, declared_id, actual_name, actual_id);
1047 mh()->print_short_name(tty);
1048 tty->cr();
1049 }
1050 }
1051 #endif //PRODUCT