1 /*
2 * Copyright (c) 1997, 2019, 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;
UnsafeCopyMemory()87 UnsafeCopyMemory() : _start_pc(NULL), _end_pc(NULL), _error_exit_pc(NULL) {}
set_start_pc(address pc)88 void set_start_pc(address pc) { _start_pc = pc; }
set_end_pc(address pc)89 void set_end_pc(address pc) { _end_pc = pc; }
set_error_exit_pc(address pc)90 void set_error_exit_pc(address pc) { _error_exit_pc = pc; }
start_pc() const91 address start_pc() const { return _start_pc; }
end_pc() const92 address end_pc() const { return _end_pc; }
error_exit_pc() const93 address error_exit_pc() const { return _error_exit_pc; }
94
set_common_exit_stub_pc(address pc)95 static void set_common_exit_stub_pc(address pc) { _common_exit_stub_pc = pc; }
common_exit_stub_pc()96 static address common_exit_stub_pc() { return _common_exit_stub_pc; }
97
add_to_table(address start_pc,address end_pc,address error_exit_pc)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 _sha1_implCompress;
224 static address _sha1_implCompressMB;
225 static address _sha256_implCompress;
226 static address _sha256_implCompressMB;
227 static address _sha512_implCompress;
228 static address _sha512_implCompressMB;
229
230 static address _updateBytesCRC32;
231 static address _crc_table_adr;
232
233 static address _crc32c_table_addr;
234 static address _updateBytesCRC32C;
235 static address _updateBytesAdler32;
236
237 static address _multiplyToLen;
238 static address _squareToLen;
239 static address _mulAdd;
240 static address _montgomeryMultiply;
241 static address _montgomerySquare;
242
243 static address _vectorizedMismatch;
244
245 static address _dexp;
246 static address _dlog;
247 static address _dlog10;
248 static address _dpow;
249 static address _dsin;
250 static address _dcos;
251 static address _dlibm_sin_cos_huge;
252 static address _dlibm_reduce_pi04l;
253 static address _dlibm_tan_cot_huge;
254 static address _dtan;
255
256 // Safefetch stubs.
257 static address _safefetch32_entry;
258 static address _safefetch32_fault_pc;
259 static address _safefetch32_continuation_pc;
260 static address _safefetchN_entry;
261 static address _safefetchN_fault_pc;
262 static address _safefetchN_continuation_pc;
263
264 public:
265 // Initialization/Testing
266 static void initialize1(); // must happen before universe::genesis
267 static void initialize2(); // must happen after universe::genesis
268
is_stub_code(address addr)269 static bool is_stub_code(address addr) { return contains(addr); }
270
contains(address addr)271 static bool contains(address addr) {
272 return
273 (_code1 != NULL && _code1->blob_contains(addr)) ||
274 (_code2 != NULL && _code2->blob_contains(addr)) ;
275 }
276
code1()277 static RuntimeBlob* code1() { return _code1; }
code2()278 static RuntimeBlob* code2() { return _code2; }
279
280 // Debugging
verify_oop_count()281 static jint verify_oop_count() { return _verify_oop_count; }
verify_oop_count_addr()282 static jint* verify_oop_count_addr() { return &_verify_oop_count; }
283 // a subroutine for debugging the GC
verify_oop_subroutine_entry_address()284 static address verify_oop_subroutine_entry_address() { return (address)&_verify_oop_subroutine_entry; }
285
catch_exception_entry()286 static address catch_exception_entry() { return _catch_exception_entry; }
287
288 // Calls to Java
289 typedef void (*CallStub)(
290 address link,
291 intptr_t* result,
292 BasicType result_type,
293 Method* method,
294 address entry_point,
295 intptr_t* parameters,
296 int size_of_parameters,
297 TRAPS
298 );
299
call_stub()300 static CallStub call_stub() { return CAST_TO_FN_PTR(CallStub, _call_stub_entry); }
301
302 // Exceptions
forward_exception_entry()303 static address forward_exception_entry() { return _forward_exception_entry; }
304 // Implicit exceptions
throw_AbstractMethodError_entry()305 static address throw_AbstractMethodError_entry() { return _throw_AbstractMethodError_entry; }
throw_IncompatibleClassChangeError_entry()306 static address throw_IncompatibleClassChangeError_entry(){ return _throw_IncompatibleClassChangeError_entry; }
throw_NullPointerException_at_call_entry()307 static address throw_NullPointerException_at_call_entry(){ return _throw_NullPointerException_at_call_entry; }
throw_StackOverflowError_entry()308 static address throw_StackOverflowError_entry() { return _throw_StackOverflowError_entry; }
throw_delayed_StackOverflowError_entry()309 static address throw_delayed_StackOverflowError_entry() { return _throw_delayed_StackOverflowError_entry; }
310
atomic_xchg_entry()311 static address atomic_xchg_entry() { return _atomic_xchg_entry; }
atomic_xchg_long_entry()312 static address atomic_xchg_long_entry() { return _atomic_xchg_long_entry; }
atomic_store_entry()313 static address atomic_store_entry() { return _atomic_store_entry; }
atomic_cmpxchg_entry()314 static address atomic_cmpxchg_entry() { return _atomic_cmpxchg_entry; }
atomic_cmpxchg_byte_entry()315 static address atomic_cmpxchg_byte_entry() { return _atomic_cmpxchg_byte_entry; }
atomic_cmpxchg_long_entry()316 static address atomic_cmpxchg_long_entry() { return _atomic_cmpxchg_long_entry; }
atomic_add_entry()317 static address atomic_add_entry() { return _atomic_add_entry; }
atomic_add_long_entry()318 static address atomic_add_long_entry() { return _atomic_add_long_entry; }
fence_entry()319 static address fence_entry() { return _fence_entry; }
320
d2i_wrapper()321 static address d2i_wrapper() { return _d2i_wrapper; }
d2l_wrapper()322 static address d2l_wrapper() { return _d2l_wrapper; }
fpu_cntrl_wrd_std()323 static jint fpu_cntrl_wrd_std() { return _fpu_cntrl_wrd_std; }
addr_fpu_cntrl_wrd_std()324 static address addr_fpu_cntrl_wrd_std() { return (address)&_fpu_cntrl_wrd_std; }
addr_fpu_cntrl_wrd_24()325 static address addr_fpu_cntrl_wrd_24() { return (address)&_fpu_cntrl_wrd_24; }
addr_fpu_cntrl_wrd_trunc()326 static address addr_fpu_cntrl_wrd_trunc() { return (address)&_fpu_cntrl_wrd_trunc; }
addr_mxcsr_std()327 static address addr_mxcsr_std() { return (address)&_mxcsr_std; }
addr_fpu_subnormal_bias1()328 static address addr_fpu_subnormal_bias1() { return (address)&_fpu_subnormal_bias1; }
addr_fpu_subnormal_bias2()329 static address addr_fpu_subnormal_bias2() { return (address)&_fpu_subnormal_bias2; }
330
331
332 static address select_arraycopy_function(BasicType t, bool aligned, bool disjoint, const char* &name, bool dest_uninitialized);
333
jbyte_arraycopy()334 static address jbyte_arraycopy() { return _jbyte_arraycopy; }
jshort_arraycopy()335 static address jshort_arraycopy() { return _jshort_arraycopy; }
jint_arraycopy()336 static address jint_arraycopy() { return _jint_arraycopy; }
jlong_arraycopy()337 static address jlong_arraycopy() { return _jlong_arraycopy; }
oop_arraycopy(bool dest_uninitialized=false)338 static address oop_arraycopy(bool dest_uninitialized = false) {
339 return dest_uninitialized ? _oop_arraycopy_uninit : _oop_arraycopy;
340 }
jbyte_disjoint_arraycopy()341 static address jbyte_disjoint_arraycopy() { return _jbyte_disjoint_arraycopy; }
jshort_disjoint_arraycopy()342 static address jshort_disjoint_arraycopy() { return _jshort_disjoint_arraycopy; }
jint_disjoint_arraycopy()343 static address jint_disjoint_arraycopy() { return _jint_disjoint_arraycopy; }
jlong_disjoint_arraycopy()344 static address jlong_disjoint_arraycopy() { return _jlong_disjoint_arraycopy; }
oop_disjoint_arraycopy(bool dest_uninitialized=false)345 static address oop_disjoint_arraycopy(bool dest_uninitialized = false) {
346 return dest_uninitialized ? _oop_disjoint_arraycopy_uninit : _oop_disjoint_arraycopy;
347 }
348
arrayof_jbyte_arraycopy()349 static address arrayof_jbyte_arraycopy() { return _arrayof_jbyte_arraycopy; }
arrayof_jshort_arraycopy()350 static address arrayof_jshort_arraycopy() { return _arrayof_jshort_arraycopy; }
arrayof_jint_arraycopy()351 static address arrayof_jint_arraycopy() { return _arrayof_jint_arraycopy; }
arrayof_jlong_arraycopy()352 static address arrayof_jlong_arraycopy() { return _arrayof_jlong_arraycopy; }
arrayof_oop_arraycopy(bool dest_uninitialized=false)353 static address arrayof_oop_arraycopy(bool dest_uninitialized = false) {
354 return dest_uninitialized ? _arrayof_oop_arraycopy_uninit : _arrayof_oop_arraycopy;
355 }
356
arrayof_jbyte_disjoint_arraycopy()357 static address arrayof_jbyte_disjoint_arraycopy() { return _arrayof_jbyte_disjoint_arraycopy; }
arrayof_jshort_disjoint_arraycopy()358 static address arrayof_jshort_disjoint_arraycopy() { return _arrayof_jshort_disjoint_arraycopy; }
arrayof_jint_disjoint_arraycopy()359 static address arrayof_jint_disjoint_arraycopy() { return _arrayof_jint_disjoint_arraycopy; }
arrayof_jlong_disjoint_arraycopy()360 static address arrayof_jlong_disjoint_arraycopy() { return _arrayof_jlong_disjoint_arraycopy; }
arrayof_oop_disjoint_arraycopy(bool dest_uninitialized=false)361 static address arrayof_oop_disjoint_arraycopy(bool dest_uninitialized = false) {
362 return dest_uninitialized ? _arrayof_oop_disjoint_arraycopy_uninit : _arrayof_oop_disjoint_arraycopy;
363 }
data_cache_writeback()364 static address data_cache_writeback() { return _data_cache_writeback; }
data_cache_writeback_sync()365 static address data_cache_writeback_sync() { return _data_cache_writeback_sync; }
366
367 typedef void (*DataCacheWritebackStub)(void *);
DataCacheWriteback_stub()368 static DataCacheWritebackStub DataCacheWriteback_stub() { return CAST_TO_FN_PTR(DataCacheWritebackStub, _data_cache_writeback); }
369 typedef void (*DataCacheWritebackSyncStub)(bool);
DataCacheWritebackSync_stub()370 static DataCacheWritebackSyncStub DataCacheWritebackSync_stub() { return CAST_TO_FN_PTR(DataCacheWritebackSyncStub, _data_cache_writeback_sync); }
371
checkcast_arraycopy(bool dest_uninitialized=false)372 static address checkcast_arraycopy(bool dest_uninitialized = false) {
373 return dest_uninitialized ? _checkcast_arraycopy_uninit : _checkcast_arraycopy;
374 }
unsafe_arraycopy()375 static address unsafe_arraycopy() { return _unsafe_arraycopy; }
376
377 typedef void (*UnsafeArrayCopyStub)(const void* src, void* dst, size_t count);
UnsafeArrayCopy_stub()378 static UnsafeArrayCopyStub UnsafeArrayCopy_stub() { return CAST_TO_FN_PTR(UnsafeArrayCopyStub, _unsafe_arraycopy); }
379
generic_arraycopy()380 static address generic_arraycopy() { return _generic_arraycopy; }
381
jbyte_fill()382 static address jbyte_fill() { return _jbyte_fill; }
jshort_fill()383 static address jshort_fill() { return _jshort_fill; }
jint_fill()384 static address jint_fill() { return _jint_fill; }
arrayof_jbyte_fill()385 static address arrayof_jbyte_fill() { return _arrayof_jbyte_fill; }
arrayof_jshort_fill()386 static address arrayof_jshort_fill() { return _arrayof_jshort_fill; }
arrayof_jint_fill()387 static address arrayof_jint_fill() { return _arrayof_jint_fill; }
388
aescrypt_encryptBlock()389 static address aescrypt_encryptBlock() { return _aescrypt_encryptBlock; }
aescrypt_decryptBlock()390 static address aescrypt_decryptBlock() { return _aescrypt_decryptBlock; }
cipherBlockChaining_encryptAESCrypt()391 static address cipherBlockChaining_encryptAESCrypt() { return _cipherBlockChaining_encryptAESCrypt; }
cipherBlockChaining_decryptAESCrypt()392 static address cipherBlockChaining_decryptAESCrypt() { return _cipherBlockChaining_decryptAESCrypt; }
electronicCodeBook_encryptAESCrypt()393 static address electronicCodeBook_encryptAESCrypt() { return _electronicCodeBook_encryptAESCrypt; }
electronicCodeBook_decryptAESCrypt()394 static address electronicCodeBook_decryptAESCrypt() { return _electronicCodeBook_decryptAESCrypt; }
counterMode_AESCrypt()395 static address counterMode_AESCrypt() { return _counterMode_AESCrypt; }
ghash_processBlocks()396 static address ghash_processBlocks() { return _ghash_processBlocks; }
base64_encodeBlock()397 static address base64_encodeBlock() { return _base64_encodeBlock; }
sha1_implCompress()398 static address sha1_implCompress() { return _sha1_implCompress; }
sha1_implCompressMB()399 static address sha1_implCompressMB() { return _sha1_implCompressMB; }
sha256_implCompress()400 static address sha256_implCompress() { return _sha256_implCompress; }
sha256_implCompressMB()401 static address sha256_implCompressMB() { return _sha256_implCompressMB; }
sha512_implCompress()402 static address sha512_implCompress() { return _sha512_implCompress; }
sha512_implCompressMB()403 static address sha512_implCompressMB() { return _sha512_implCompressMB; }
404
updateBytesCRC32()405 static address updateBytesCRC32() { return _updateBytesCRC32; }
crc_table_addr()406 static address crc_table_addr() { return _crc_table_adr; }
407
crc32c_table_addr()408 static address crc32c_table_addr() { return _crc32c_table_addr; }
updateBytesCRC32C()409 static address updateBytesCRC32C() { return _updateBytesCRC32C; }
updateBytesAdler32()410 static address updateBytesAdler32() { return _updateBytesAdler32; }
411
multiplyToLen()412 static address multiplyToLen() { return _multiplyToLen; }
squareToLen()413 static address squareToLen() { return _squareToLen; }
mulAdd()414 static address mulAdd() { return _mulAdd; }
montgomeryMultiply()415 static address montgomeryMultiply() { return _montgomeryMultiply; }
montgomerySquare()416 static address montgomerySquare() { return _montgomerySquare; }
417
vectorizedMismatch()418 static address vectorizedMismatch() { return _vectorizedMismatch; }
419
dexp()420 static address dexp() { return _dexp; }
dlog()421 static address dlog() { return _dlog; }
dlog10()422 static address dlog10() { return _dlog10; }
dpow()423 static address dpow() { return _dpow; }
dsin()424 static address dsin() { return _dsin; }
dcos()425 static address dcos() { return _dcos; }
dlibm_reduce_pi04l()426 static address dlibm_reduce_pi04l() { return _dlibm_reduce_pi04l; }
dlibm_sin_cos_huge()427 static address dlibm_sin_cos_huge() { return _dlibm_sin_cos_huge; }
dlibm_tan_cot_huge()428 static address dlibm_tan_cot_huge() { return _dlibm_tan_cot_huge; }
dtan()429 static address dtan() { return _dtan; }
430
431 static address select_fill_function(BasicType t, bool aligned, const char* &name);
432
zero_aligned_words()433 static address zero_aligned_words() { return _zero_aligned_words; }
434
435 //
436 // Safefetch stub support
437 //
438
439 typedef int (*SafeFetch32Stub)(int* adr, int errValue);
440 typedef intptr_t (*SafeFetchNStub) (intptr_t* adr, intptr_t errValue);
441
SafeFetch32_stub()442 static SafeFetch32Stub SafeFetch32_stub() { return CAST_TO_FN_PTR(SafeFetch32Stub, _safefetch32_entry); }
SafeFetchN_stub()443 static SafeFetchNStub SafeFetchN_stub() { return CAST_TO_FN_PTR(SafeFetchNStub, _safefetchN_entry); }
444
is_safefetch_fault(address pc)445 static bool is_safefetch_fault(address pc) {
446 return pc != NULL &&
447 (pc == _safefetch32_fault_pc ||
448 pc == _safefetchN_fault_pc);
449 }
450
continuation_for_safefetch_fault(address pc)451 static address continuation_for_safefetch_fault(address pc) {
452 assert(_safefetch32_continuation_pc != NULL &&
453 _safefetchN_continuation_pc != NULL,
454 "not initialized");
455
456 if (pc == _safefetch32_fault_pc) return _safefetch32_continuation_pc;
457 if (pc == _safefetchN_fault_pc) return _safefetchN_continuation_pc;
458
459 ShouldNotReachHere();
460 return NULL;
461 }
462
463 //
464 // Default versions of the above arraycopy functions for platforms which do
465 // not have specialized versions
466 //
467 static void jbyte_copy (jbyte* src, jbyte* dest, size_t count);
468 static void jshort_copy (jshort* src, jshort* dest, size_t count);
469 static void jint_copy (jint* src, jint* dest, size_t count);
470 static void jlong_copy (jlong* src, jlong* dest, size_t count);
471 static void oop_copy (oop* src, oop* dest, size_t count);
472 static void oop_copy_uninit(oop* src, oop* dest, size_t count);
473
474 static void arrayof_jbyte_copy (HeapWord* src, HeapWord* dest, size_t count);
475 static void arrayof_jshort_copy (HeapWord* src, HeapWord* dest, size_t count);
476 static void arrayof_jint_copy (HeapWord* src, HeapWord* dest, size_t count);
477 static void arrayof_jlong_copy (HeapWord* src, HeapWord* dest, size_t count);
478 static void arrayof_oop_copy (HeapWord* src, HeapWord* dest, size_t count);
479 static void arrayof_oop_copy_uninit(HeapWord* src, HeapWord* dest, size_t count);
480 };
481
482 // Safefetch allows to load a value from a location that's not known
483 // to be valid. If the load causes a fault, the error value is returned.
SafeFetch32(int * adr,int errValue)484 inline int SafeFetch32(int* adr, int errValue) {
485 assert(StubRoutines::SafeFetch32_stub(), "stub not yet generated");
486 return StubRoutines::SafeFetch32_stub()(adr, errValue);
487 }
SafeFetchN(intptr_t * adr,intptr_t errValue)488 inline intptr_t SafeFetchN(intptr_t* adr, intptr_t errValue) {
489 assert(StubRoutines::SafeFetchN_stub(), "stub not yet generated");
490 return StubRoutines::SafeFetchN_stub()(adr, errValue);
491 }
492
493
494 // returns true if SafeFetch32 and SafeFetchN can be used safely (stubroutines are already generated)
CanUseSafeFetch32()495 inline bool CanUseSafeFetch32() {
496 return StubRoutines::SafeFetch32_stub() ? true : false;
497 }
498
CanUseSafeFetchN()499 inline bool CanUseSafeFetchN() {
500 return StubRoutines::SafeFetchN_stub() ? true : false;
501 }
502 #endif // SHARE_RUNTIME_STUBROUTINES_HPP
503