1 /*
2 * Copyright (c) 1997, 2020, 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 #ifndef SHARE_RUNTIME_STUBROUTINES_HPP
26 #define SHARE_RUNTIME_STUBROUTINES_HPP
27
28 #include "code/codeBlob.hpp"
29 #include "memory/allocation.hpp"
30 #include "runtime/frame.hpp"
31 #include "runtime/mutexLocker.hpp"
32 #include "runtime/stubCodeGenerator.hpp"
33 #include "utilities/macros.hpp"
34
35 // StubRoutines provides entry points to assembly routines used by
36 // compiled code and the run-time system. Platform-specific entry
37 // points are defined in the platform-specific inner class.
38 //
39 // Class scheme:
40 //
41 // platform-independent platform-dependent
42 //
43 // stubRoutines.hpp <-- included -- stubRoutines_<arch>.hpp
44 // ^ ^
45 // | |
46 // implements implements
47 // | |
48 // | |
49 // stubRoutines.cpp stubRoutines_<arch>.cpp
50 // stubRoutines_<os_family>.cpp stubGenerator_<arch>.cpp
51 // stubRoutines_<os_arch>.cpp
52 //
53 // Note 1: The important thing is a clean decoupling between stub
54 // entry points (interfacing to the whole vm; i.e., 1-to-n
55 // relationship) and stub generators (interfacing only to
56 // the entry points implementation; i.e., 1-to-1 relationship).
57 // This significantly simplifies changes in the generator
58 // structure since the rest of the vm is not affected.
59 //
60 // Note 2: stubGenerator_<arch>.cpp contains a minimal portion of
61 // machine-independent code; namely the generator calls of
62 // the generator functions that are used platform-independently.
63 // However, it comes with the advantage of having a 1-file
64 // implementation of the generator. It should be fairly easy
65 // to change, should it become a problem later.
66 //
67 // Scheme for adding a new entry point:
68 //
69 // 1. determine if it's a platform-dependent or independent entry point
70 // a) if platform independent: make subsequent changes in the independent files
71 // b) if platform dependent: make subsequent changes in the dependent files
72 // 2. add a private instance variable holding the entry point address
73 // 3. add a public accessor function to the instance variable
74 // 4. implement the corresponding generator function in the platform-dependent
75 // stubGenerator_<arch>.cpp file and call the function in generate_all() of that file
76
77 class UnsafeCopyMemory : public CHeapObj<mtCode> {
78 private:
79 address _start_pc;
80 address _end_pc;
81 address _error_exit_pc;
82 public:
83 static address _common_exit_stub_pc;
84 static UnsafeCopyMemory* _table;
85 static int _table_length;
86 static int _table_max_length;
87 UnsafeCopyMemory() : _start_pc(NULL), _end_pc(NULL), _error_exit_pc(NULL) {}
88 void set_start_pc(address pc) { _start_pc = pc; }
89 void set_end_pc(address pc) { _end_pc = pc; }
90 void set_error_exit_pc(address pc) { _error_exit_pc = pc; }
91 address start_pc() const { return _start_pc; }
92 address end_pc() const { return _end_pc; }
93 address error_exit_pc() const { return _error_exit_pc; }
94
95 static void set_common_exit_stub_pc(address pc) { _common_exit_stub_pc = pc; }
96 static address common_exit_stub_pc() { return _common_exit_stub_pc; }
97
98 static UnsafeCopyMemory* add_to_table(address start_pc, address end_pc, address error_exit_pc) {
99 guarantee(_table_length < _table_max_length, "Incorrect UnsafeCopyMemory::_table_max_length");
100 UnsafeCopyMemory* entry = &_table[_table_length];
101 entry->set_start_pc(start_pc);
102 entry->set_end_pc(end_pc);
103 entry->set_error_exit_pc(error_exit_pc);
104
105 _table_length++;
106 return entry;
107 }
108
109 static bool contains_pc(address pc);
110 static address page_error_continue_pc(address pc);
111 static void create_table(int max_size);
112 };
113
114 class UnsafeCopyMemoryMark : public StackObj {
115 private:
116 UnsafeCopyMemory* _ucm_entry;
117 StubCodeGenerator* _cgen;
118 public:
119 UnsafeCopyMemoryMark(StubCodeGenerator* cgen, bool add_entry, bool continue_at_scope_end, address error_exit_pc = NULL);
120 ~UnsafeCopyMemoryMark();
121 };
122
123 class StubRoutines: AllStatic {
124
125 public:
126 // Dependencies
127 friend class StubGenerator;
128
129 #include CPU_HEADER(stubRoutines)
130
131 static jint _verify_oop_count;
132 static address _verify_oop_subroutine_entry;
133
134 static address _call_stub_return_address; // the return PC, when returning to a call stub
135 static address _call_stub_entry;
136 static address _forward_exception_entry;
137 static address _catch_exception_entry;
138 static address _throw_AbstractMethodError_entry;
139 static address _throw_IncompatibleClassChangeError_entry;
140 static address _throw_NullPointerException_at_call_entry;
141 static address _throw_StackOverflowError_entry;
142 static address _throw_delayed_StackOverflowError_entry;
143
144 static address _atomic_xchg_entry;
145 static address _atomic_xchg_long_entry;
146 static address _atomic_store_entry;
147 static address _atomic_cmpxchg_entry;
148 static address _atomic_cmpxchg_byte_entry;
149 static address _atomic_cmpxchg_long_entry;
150 static address _atomic_add_entry;
151 static address _atomic_add_long_entry;
152 static address _fence_entry;
153 static address _d2i_wrapper;
154 static address _d2l_wrapper;
155
156 static jint _fpu_cntrl_wrd_std;
157 static jint _fpu_cntrl_wrd_24;
158 static jint _fpu_cntrl_wrd_trunc;
159 static jint _mxcsr_std;
160 static jint _fpu_subnormal_bias1[3];
161 static jint _fpu_subnormal_bias2[3];
162
163 static BufferBlob* _code1; // code buffer for initial routines
164 static BufferBlob* _code2; // code buffer for all other routines
165
166 // Leaf routines which implement arraycopy and their addresses
167 // arraycopy operands aligned on element type boundary
168 static address _jbyte_arraycopy;
169 static address _jshort_arraycopy;
170 static address _jint_arraycopy;
171 static address _jlong_arraycopy;
172 static address _oop_arraycopy, _oop_arraycopy_uninit;
173 static address _jbyte_disjoint_arraycopy;
174 static address _jshort_disjoint_arraycopy;
175 static address _jint_disjoint_arraycopy;
176 static address _jlong_disjoint_arraycopy;
177 static address _oop_disjoint_arraycopy, _oop_disjoint_arraycopy_uninit;
178
179 // arraycopy operands aligned on zero'th element boundary
180 // These are identical to the ones aligned aligned on an
181 // element type boundary, except that they assume that both
182 // source and destination are HeapWord aligned.
183 static address _arrayof_jbyte_arraycopy;
184 static address _arrayof_jshort_arraycopy;
185 static address _arrayof_jint_arraycopy;
186 static address _arrayof_jlong_arraycopy;
187 static address _arrayof_oop_arraycopy, _arrayof_oop_arraycopy_uninit;
188 static address _arrayof_jbyte_disjoint_arraycopy;
189 static address _arrayof_jshort_disjoint_arraycopy;
190 static address _arrayof_jint_disjoint_arraycopy;
191 static address _arrayof_jlong_disjoint_arraycopy;
192 static address _arrayof_oop_disjoint_arraycopy, _arrayof_oop_disjoint_arraycopy_uninit;
193
194 // cache line writeback
195 static address _data_cache_writeback;
196 static address _data_cache_writeback_sync;
197
198 // these are recommended but optional:
199 static address _checkcast_arraycopy, _checkcast_arraycopy_uninit;
200 static address _unsafe_arraycopy;
201 static address _generic_arraycopy;
202
203 static address _jbyte_fill;
204 static address _jshort_fill;
205 static address _jint_fill;
206 static address _arrayof_jbyte_fill;
207 static address _arrayof_jshort_fill;
208 static address _arrayof_jint_fill;
209
210 // zero heap space aligned to jlong (8 bytes)
211 static address _zero_aligned_words;
212
213 static address _aescrypt_encryptBlock;
214 static address _aescrypt_decryptBlock;
215 static address _cipherBlockChaining_encryptAESCrypt;
216 static address _cipherBlockChaining_decryptAESCrypt;
217 static address _electronicCodeBook_encryptAESCrypt;
218 static address _electronicCodeBook_decryptAESCrypt;
219 static address _counterMode_AESCrypt;
220 static address _ghash_processBlocks;
221 static address _base64_encodeBlock;
222
223 static address _md5_implCompress;
224 static address _md5_implCompressMB;
225 static address _sha1_implCompress;
226 static address _sha1_implCompressMB;
227 static address _sha256_implCompress;
228 static address _sha256_implCompressMB;
229 static address _sha512_implCompress;
230 static address _sha512_implCompressMB;
231 static address _sha3_implCompress;
232 static address _sha3_implCompressMB;
233
234 static address _updateBytesCRC32;
235 static address _crc_table_adr;
236
237 static address _crc32c_table_addr;
238 static address _updateBytesCRC32C;
239 static address _updateBytesAdler32;
240
241 static address _multiplyToLen;
242 static address _squareToLen;
243 static address _mulAdd;
244 static address _montgomeryMultiply;
245 static address _montgomerySquare;
246 static address _bigIntegerRightShiftWorker;
247 static address _bigIntegerLeftShiftWorker;
248
249 static address _vectorizedMismatch;
250
251 static address _dexp;
252 static address _dlog;
253 static address _dlog10;
254 static address _dpow;
255 static address _dsin;
256 static address _dcos;
257 static address _dlibm_sin_cos_huge;
258 static address _dlibm_reduce_pi04l;
259 static address _dlibm_tan_cot_huge;
260 static address _dtan;
261
262 // Safefetch stubs.
263 static address _safefetch32_entry;
264 static address _safefetch32_fault_pc;
265 static address _safefetch32_continuation_pc;
266 static address _safefetchN_entry;
267 static address _safefetchN_fault_pc;
268 static address _safefetchN_continuation_pc;
269
270 public:
271 // Initialization/Testing
272 static void initialize1(); // must happen before universe::genesis
273 static void initialize2(); // must happen after universe::genesis
274
275 static bool is_stub_code(address addr) { return contains(addr); }
276
277 static bool contains(address addr) {
278 return
279 (_code1 != NULL && _code1->blob_contains(addr)) ||
280 (_code2 != NULL && _code2->blob_contains(addr)) ;
281 }
282
283 static RuntimeBlob* code1() { return _code1; }
284 static RuntimeBlob* code2() { return _code2; }
285
286 // Debugging
287 static jint verify_oop_count() { return _verify_oop_count; }
288 static jint* verify_oop_count_addr() { return &_verify_oop_count; }
289 // a subroutine for debugging the GC
290 static address verify_oop_subroutine_entry_address() { return (address)&_verify_oop_subroutine_entry; }
291
292 static address catch_exception_entry() { return _catch_exception_entry; }
293
294 // Calls to Java
295 typedef void (*CallStub)(
296 address link,
297 intptr_t* result,
298 BasicType result_type,
299 Method* method,
300 address entry_point,
301 intptr_t* parameters,
302 int size_of_parameters,
303 TRAPS
304 );
305
306 static CallStub call_stub() { return CAST_TO_FN_PTR(CallStub, _call_stub_entry); }
307
308 // Exceptions
309 static address forward_exception_entry() { return _forward_exception_entry; }
310 // Implicit exceptions
311 static address throw_AbstractMethodError_entry() { return _throw_AbstractMethodError_entry; }
312 static address throw_IncompatibleClassChangeError_entry(){ return _throw_IncompatibleClassChangeError_entry; }
313 static address throw_NullPointerException_at_call_entry(){ return _throw_NullPointerException_at_call_entry; }
314 static address throw_StackOverflowError_entry() { return _throw_StackOverflowError_entry; }
315 static address throw_delayed_StackOverflowError_entry() { return _throw_delayed_StackOverflowError_entry; }
316
317 static address atomic_xchg_entry() { return _atomic_xchg_entry; }
318 static address atomic_xchg_long_entry() { return _atomic_xchg_long_entry; }
319 static address atomic_store_entry() { return _atomic_store_entry; }
320 static address atomic_cmpxchg_entry() { return _atomic_cmpxchg_entry; }
321 static address atomic_cmpxchg_byte_entry() { return _atomic_cmpxchg_byte_entry; }
322 static address atomic_cmpxchg_long_entry() { return _atomic_cmpxchg_long_entry; }
323 static address atomic_add_entry() { return _atomic_add_entry; }
324 static address atomic_add_long_entry() { return _atomic_add_long_entry; }
325 static address fence_entry() { return _fence_entry; }
326
327 static address d2i_wrapper() { return _d2i_wrapper; }
328 static address d2l_wrapper() { return _d2l_wrapper; }
329 static jint fpu_cntrl_wrd_std() { return _fpu_cntrl_wrd_std; }
330 static address addr_fpu_cntrl_wrd_std() { return (address)&_fpu_cntrl_wrd_std; }
331 static address addr_fpu_cntrl_wrd_24() { return (address)&_fpu_cntrl_wrd_24; }
332 static address addr_fpu_cntrl_wrd_trunc() { return (address)&_fpu_cntrl_wrd_trunc; }
333 static address addr_mxcsr_std() { return (address)&_mxcsr_std; }
334 static address addr_fpu_subnormal_bias1() { return (address)&_fpu_subnormal_bias1; }
335 static address addr_fpu_subnormal_bias2() { return (address)&_fpu_subnormal_bias2; }
336
337
338 static address select_arraycopy_function(BasicType t, bool aligned, bool disjoint, const char* &name, bool dest_uninitialized);
339
340 static address jbyte_arraycopy() { return _jbyte_arraycopy; }
341 static address jshort_arraycopy() { return _jshort_arraycopy; }
342 static address jint_arraycopy() { return _jint_arraycopy; }
343 static address jlong_arraycopy() { return _jlong_arraycopy; }
344 static address oop_arraycopy(bool dest_uninitialized = false) {
345 return dest_uninitialized ? _oop_arraycopy_uninit : _oop_arraycopy;
346 }
347 static address jbyte_disjoint_arraycopy() { return _jbyte_disjoint_arraycopy; }
348 static address jshort_disjoint_arraycopy() { return _jshort_disjoint_arraycopy; }
349 static address jint_disjoint_arraycopy() { return _jint_disjoint_arraycopy; }
350 static address jlong_disjoint_arraycopy() { return _jlong_disjoint_arraycopy; }
351 static address oop_disjoint_arraycopy(bool dest_uninitialized = false) {
352 return dest_uninitialized ? _oop_disjoint_arraycopy_uninit : _oop_disjoint_arraycopy;
353 }
354
355 static address arrayof_jbyte_arraycopy() { return _arrayof_jbyte_arraycopy; }
356 static address arrayof_jshort_arraycopy() { return _arrayof_jshort_arraycopy; }
357 static address arrayof_jint_arraycopy() { return _arrayof_jint_arraycopy; }
358 static address arrayof_jlong_arraycopy() { return _arrayof_jlong_arraycopy; }
359 static address arrayof_oop_arraycopy(bool dest_uninitialized = false) {
360 return dest_uninitialized ? _arrayof_oop_arraycopy_uninit : _arrayof_oop_arraycopy;
361 }
362
363 static address arrayof_jbyte_disjoint_arraycopy() { return _arrayof_jbyte_disjoint_arraycopy; }
364 static address arrayof_jshort_disjoint_arraycopy() { return _arrayof_jshort_disjoint_arraycopy; }
365 static address arrayof_jint_disjoint_arraycopy() { return _arrayof_jint_disjoint_arraycopy; }
366 static address arrayof_jlong_disjoint_arraycopy() { return _arrayof_jlong_disjoint_arraycopy; }
367 static address arrayof_oop_disjoint_arraycopy(bool dest_uninitialized = false) {
368 return dest_uninitialized ? _arrayof_oop_disjoint_arraycopy_uninit : _arrayof_oop_disjoint_arraycopy;
369 }
370 static address data_cache_writeback() { return _data_cache_writeback; }
371 static address data_cache_writeback_sync() { return _data_cache_writeback_sync; }
372
373 typedef void (*DataCacheWritebackStub)(void *);
374 static DataCacheWritebackStub DataCacheWriteback_stub() { return CAST_TO_FN_PTR(DataCacheWritebackStub, _data_cache_writeback); }
375 typedef void (*DataCacheWritebackSyncStub)(bool);
376 static DataCacheWritebackSyncStub DataCacheWritebackSync_stub() { return CAST_TO_FN_PTR(DataCacheWritebackSyncStub, _data_cache_writeback_sync); }
377
378 static address checkcast_arraycopy(bool dest_uninitialized = false) {
379 return dest_uninitialized ? _checkcast_arraycopy_uninit : _checkcast_arraycopy;
380 }
381 static address unsafe_arraycopy() { return _unsafe_arraycopy; }
382
383 typedef void (*UnsafeArrayCopyStub)(const void* src, void* dst, size_t count);
384 static UnsafeArrayCopyStub UnsafeArrayCopy_stub() { return CAST_TO_FN_PTR(UnsafeArrayCopyStub, _unsafe_arraycopy); }
385
386 static address generic_arraycopy() { return _generic_arraycopy; }
387
388 static address jbyte_fill() { return _jbyte_fill; }
389 static address jshort_fill() { return _jshort_fill; }
390 static address jint_fill() { return _jint_fill; }
391 static address arrayof_jbyte_fill() { return _arrayof_jbyte_fill; }
392 static address arrayof_jshort_fill() { return _arrayof_jshort_fill; }
393 static address arrayof_jint_fill() { return _arrayof_jint_fill; }
394
395 static address aescrypt_encryptBlock() { return _aescrypt_encryptBlock; }
396 static address aescrypt_decryptBlock() { return _aescrypt_decryptBlock; }
397 static address cipherBlockChaining_encryptAESCrypt() { return _cipherBlockChaining_encryptAESCrypt; }
398 static address cipherBlockChaining_decryptAESCrypt() { return _cipherBlockChaining_decryptAESCrypt; }
399 static address electronicCodeBook_encryptAESCrypt() { return _electronicCodeBook_encryptAESCrypt; }
400 static address electronicCodeBook_decryptAESCrypt() { return _electronicCodeBook_decryptAESCrypt; }
401 static address counterMode_AESCrypt() { return _counterMode_AESCrypt; }
402 static address ghash_processBlocks() { return _ghash_processBlocks; }
403 static address base64_encodeBlock() { return _base64_encodeBlock; }
404 static address md5_implCompress() { return _md5_implCompress; }
405 static address md5_implCompressMB() { return _md5_implCompressMB; }
406 static address sha1_implCompress() { return _sha1_implCompress; }
407 static address sha1_implCompressMB() { return _sha1_implCompressMB; }
408 static address sha256_implCompress() { return _sha256_implCompress; }
409 static address sha256_implCompressMB() { return _sha256_implCompressMB; }
410 static address sha512_implCompress() { return _sha512_implCompress; }
411 static address sha512_implCompressMB() { return _sha512_implCompressMB; }
412 static address sha3_implCompress() { return _sha3_implCompress; }
413 static address sha3_implCompressMB() { return _sha3_implCompressMB; }
414
415 static address updateBytesCRC32() { return _updateBytesCRC32; }
416 static address crc_table_addr() { return _crc_table_adr; }
417
418 static address crc32c_table_addr() { return _crc32c_table_addr; }
419 static address updateBytesCRC32C() { return _updateBytesCRC32C; }
420 static address updateBytesAdler32() { return _updateBytesAdler32; }
421
422 static address multiplyToLen() { return _multiplyToLen; }
423 static address squareToLen() { return _squareToLen; }
424 static address mulAdd() { return _mulAdd; }
425 static address montgomeryMultiply() { return _montgomeryMultiply; }
426 static address montgomerySquare() { return _montgomerySquare; }
427 static address bigIntegerRightShift() { return _bigIntegerRightShiftWorker; }
428 static address bigIntegerLeftShift() { return _bigIntegerLeftShiftWorker; }
429
430 static address vectorizedMismatch() { return _vectorizedMismatch; }
431
432 static address dexp() { return _dexp; }
433 static address dlog() { return _dlog; }
434 static address dlog10() { return _dlog10; }
435 static address dpow() { return _dpow; }
436 static address dsin() { return _dsin; }
437 static address dcos() { return _dcos; }
438 static address dlibm_reduce_pi04l() { return _dlibm_reduce_pi04l; }
439 static address dlibm_sin_cos_huge() { return _dlibm_sin_cos_huge; }
440 static address dlibm_tan_cot_huge() { return _dlibm_tan_cot_huge; }
441 static address dtan() { return _dtan; }
442
443 static address select_fill_function(BasicType t, bool aligned, const char* &name);
444
445 static address zero_aligned_words() { return _zero_aligned_words; }
446
447 //
448 // Safefetch stub support
449 //
450
451 typedef int (*SafeFetch32Stub)(int* adr, int errValue);
452 typedef intptr_t (*SafeFetchNStub) (intptr_t* adr, intptr_t errValue);
453
454 static SafeFetch32Stub SafeFetch32_stub() { return CAST_TO_FN_PTR(SafeFetch32Stub, _safefetch32_entry); }
455 static SafeFetchNStub SafeFetchN_stub() { return CAST_TO_FN_PTR(SafeFetchNStub, _safefetchN_entry); }
456
457 static bool is_safefetch_fault(address pc) {
458 return pc != NULL &&
459 (pc == _safefetch32_fault_pc ||
460 pc == _safefetchN_fault_pc);
461 }
462
463 static address continuation_for_safefetch_fault(address pc) {
464 assert(_safefetch32_continuation_pc != NULL &&
465 _safefetchN_continuation_pc != NULL,
466 "not initialized");
467
468 if (pc == _safefetch32_fault_pc) return _safefetch32_continuation_pc;
469 if (pc == _safefetchN_fault_pc) return _safefetchN_continuation_pc;
470
471 ShouldNotReachHere();
472 return NULL;
473 }
474
475 //
476 // Default versions of the above arraycopy functions for platforms which do
477 // not have specialized versions
478 //
479 static void jbyte_copy (jbyte* src, jbyte* dest, size_t count);
480 static void jshort_copy (jshort* src, jshort* dest, size_t count);
481 static void jint_copy (jint* src, jint* dest, size_t count);
482 static void jlong_copy (jlong* src, jlong* dest, size_t count);
483 static void oop_copy (oop* src, oop* dest, size_t count);
484 static void oop_copy_uninit(oop* src, oop* dest, size_t count);
485
486 static void arrayof_jbyte_copy (HeapWord* src, HeapWord* dest, size_t count);
487 static void arrayof_jshort_copy (HeapWord* src, HeapWord* dest, size_t count);
488 static void arrayof_jint_copy (HeapWord* src, HeapWord* dest, size_t count);
489 static void arrayof_jlong_copy (HeapWord* src, HeapWord* dest, size_t count);
490 static void arrayof_oop_copy (HeapWord* src, HeapWord* dest, size_t count);
491 static void arrayof_oop_copy_uninit(HeapWord* src, HeapWord* dest, size_t count);
492 };
493
494 // Safefetch allows to load a value from a location that's not known
495 // to be valid. If the load causes a fault, the error value is returned.
496 inline int SafeFetch32(int* adr, int errValue) {
497 assert(StubRoutines::SafeFetch32_stub(), "stub not yet generated");
498 return StubRoutines::SafeFetch32_stub()(adr, errValue);
499 }
500 inline intptr_t SafeFetchN(intptr_t* adr, intptr_t errValue) {
501 assert(StubRoutines::SafeFetchN_stub(), "stub not yet generated");
502 return StubRoutines::SafeFetchN_stub()(adr, errValue);
503 }
504
505
506 // returns true if SafeFetch32 and SafeFetchN can be used safely (stubroutines are already generated)
507 inline bool CanUseSafeFetch32() {
508 return StubRoutines::SafeFetch32_stub() ? true : false;
509 }
510
511 inline bool CanUseSafeFetchN() {
512 return StubRoutines::SafeFetchN_stub() ? true : false;
513 }
514 #endif // SHARE_RUNTIME_STUBROUTINES_HPP