1 /* 2 * Copyright (c) 1997, 2024, 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 "prims/vectorSupport.hpp" 31 #include "runtime/frame.hpp" 32 #include "runtime/mutexLocker.hpp" 33 #include "runtime/stubCodeGenerator.hpp" 34 #include "runtime/threadWXSetters.inline.hpp" 35 #include "utilities/macros.hpp" 36 37 // StubRoutines provides entry points to assembly routines used by 38 // compiled code and the run-time system. Platform-specific entry 39 // points are defined in the platform-specific inner class. Most 40 // routines have a single (main) entry point. However, a few routines 41 // do provide alternative entry points. 42 // 43 // Stub routines whose entries are advertised via class StubRoutines 44 // are generated in batches at well-defined stages during JVM init: 45 // initial stubs, continuation stubs, compiler stubs, final stubs. 46 // Each batch is embedded in a single, associated blob (an instance of 47 // BufferBlob) i.e. the blob to entry relationship is 1-m. 48 // 49 // Note that this constrasts with the much smaller number of stub 50 // routines generated via classes SharedRuntime, c1_Runtime1 and 51 // OptoRuntime. The latter routines are also generated at well-defined 52 // points during JVM init. However, each stub routine has its own 53 // unique blob (various subclasses of RuntimeBlob) i.e. the blob to 54 // entry relationship is 1-1. The difference arises because 55 // SharedRuntime routines may need to be relocatable or advertise 56 // properties such as a frame size via their blob. 57 // 58 // Staging of stub routine generation is needed in order to manage 59 // init dependencies between 1) stubs and other stubs or 2) stubs and 60 // other runtime components. For example, some exception throw stubs 61 // need to be generated before compiler stubs (such as the 62 // deoptimization stub) so that the latter can invoke the thrwo rotine 63 // in bail-out code. Likewise, stubs that access objects (such as the 64 // object array copy stub) need to be created after initialization of 65 // some GC constants and generation of the GC barrier stubs they might 66 // need to invoke. 67 // 68 // Class scheme: 69 // 70 // platform-independent platform-dependent 71 // 72 // stubRoutines.hpp <-- included -- stubRoutines_<arch>.hpp 73 // ^ ^ 74 // | | 75 // implements implements 76 // | | 77 // | | 78 // stubRoutines.cpp stubRoutines_<arch>.cpp 79 // stubGenerator_<arch>.cpp 80 // 81 // Note 1: The important thing is a clean decoupling between stub 82 // entry points (interfacing to the whole vm; i.e., 1-to-n 83 // relationship) and stub generators (interfacing only to 84 // the entry points implementation; i.e., 1-to-1 relationship). 85 // This significantly simplifies changes in the generator 86 // structure since the rest of the vm is not affected. 87 // 88 // Note 2: stubGenerator_<arch>.cpp contains a minimal portion of 89 // machine-independent code; namely the generator calls of 90 // the generator functions that are used platform-independently. 91 // However, it comes with the advantage of having a 1-file 92 // implementation of the generator. It should be fairly easy 93 // to change, should it become a problem later. 94 // 95 // Scheme for adding a new entry point: 96 // 97 // 1. determine if it's a platform-dependent or independent entry point 98 // a) if platform independent: make subsequent changes in the independent files 99 // b) if platform dependent: make subsequent changes in the dependent files 100 // 2. add a private instance variable holding the entry point address 101 // 3. add a public accessor function to the instance variable 102 // 4. implement the corresponding generator function in the platform-dependent 103 // stubGenerator_<arch>.cpp file and call the function in generate_all() of that file 104 // 5. ensure the entry is generated in the right blob to satisfy initialization 105 // dependencies between it and other stubs or runtime components. 106 107 class UnsafeMemoryAccess : public CHeapObj<mtCode> { 108 private: 109 address _start_pc; 110 address _end_pc; 111 address _error_exit_pc; 112 public: 113 static address _common_exit_stub_pc; 114 static UnsafeMemoryAccess* _table; 115 static int _table_length; 116 static int _table_max_length; 117 UnsafeMemoryAccess() : _start_pc(nullptr), _end_pc(nullptr), _error_exit_pc(nullptr) {} 118 void set_start_pc(address pc) { _start_pc = pc; } 119 void set_end_pc(address pc) { _end_pc = pc; } 120 void set_error_exit_pc(address pc) { _error_exit_pc = pc; } 121 address start_pc() const { return _start_pc; } 122 address end_pc() const { return _end_pc; } 123 address error_exit_pc() const { return _error_exit_pc; } 124 125 static void set_common_exit_stub_pc(address pc) { _common_exit_stub_pc = pc; } 126 static address common_exit_stub_pc() { return _common_exit_stub_pc; } 127 128 static UnsafeMemoryAccess* add_to_table(address start_pc, address end_pc, address error_exit_pc) { 129 guarantee(_table_length < _table_max_length, "Incorrect UnsafeMemoryAccess::_table_max_length"); 130 UnsafeMemoryAccess* entry = &_table[_table_length]; 131 entry->set_start_pc(start_pc); 132 entry->set_end_pc(end_pc); 133 entry->set_error_exit_pc(error_exit_pc); 134 135 _table_length++; 136 return entry; 137 } 138 139 static bool contains_pc(address pc); 140 static address page_error_continue_pc(address pc); 141 static void create_table(int max_size); 142 }; 143 144 class UnsafeMemoryAccessMark : public StackObj { 145 private: 146 UnsafeMemoryAccess* _ucm_entry; 147 StubCodeGenerator* _cgen; 148 public: 149 UnsafeMemoryAccessMark(StubCodeGenerator* cgen, bool add_entry, bool continue_at_scope_end, address error_exit_pc = nullptr); 150 ~UnsafeMemoryAccessMark(); 151 }; 152 153 class StubRoutines: AllStatic { 154 155 public: 156 // Dependencies 157 friend class StubGenerator; 158 159 #include CPU_HEADER(stubRoutines) 160 161 static jint _verify_oop_count; 162 static address _verify_oop_subroutine_entry; 163 164 static address _call_stub_return_address; // the return PC, when returning to a call stub 165 static address _call_stub_entry; 166 static address _forward_exception_entry; 167 static address _catch_exception_entry; 168 169 static address _atomic_xchg_entry; 170 static address _atomic_cmpxchg_entry; 171 static address _atomic_cmpxchg_long_entry; 172 static address _atomic_add_entry; 173 static address _fence_entry; 174 175 static BufferBlob* _initial_stubs_code; // code buffer for initial routines 176 static BufferBlob* _continuation_stubs_code; // code buffer for continuation stubs 177 static BufferBlob* _compiler_stubs_code; // code buffer for C2 intrinsics 178 static BufferBlob* _final_stubs_code; // code buffer for all other routines 179 180 static address _array_sort; 181 static address _array_partition; 182 // Leaf routines which implement arraycopy and their addresses 183 // arraycopy operands aligned on element type boundary 184 static address _jbyte_arraycopy; 185 static address _jshort_arraycopy; 186 static address _jint_arraycopy; 187 static address _jlong_arraycopy; 188 static address _oop_arraycopy, _oop_arraycopy_uninit; 189 static address _jbyte_disjoint_arraycopy; 190 static address _jshort_disjoint_arraycopy; 191 static address _jint_disjoint_arraycopy; 192 static address _jlong_disjoint_arraycopy; 193 static address _oop_disjoint_arraycopy, _oop_disjoint_arraycopy_uninit; 194 195 // arraycopy operands aligned on zero'th element boundary 196 // These are identical to the ones aligned aligned on an 197 // element type boundary, except that they assume that both 198 // source and destination are HeapWord aligned. 199 static address _arrayof_jbyte_arraycopy; 200 static address _arrayof_jshort_arraycopy; 201 static address _arrayof_jint_arraycopy; 202 static address _arrayof_jlong_arraycopy; 203 static address _arrayof_oop_arraycopy, _arrayof_oop_arraycopy_uninit; 204 static address _arrayof_jbyte_disjoint_arraycopy; 205 static address _arrayof_jshort_disjoint_arraycopy; 206 static address _arrayof_jint_disjoint_arraycopy; 207 static address _arrayof_jlong_disjoint_arraycopy; 208 static address _arrayof_oop_disjoint_arraycopy, _arrayof_oop_disjoint_arraycopy_uninit; 209 210 // cache line writeback 211 static address _data_cache_writeback; 212 static address _data_cache_writeback_sync; 213 214 // these are recommended but optional: 215 static address _checkcast_arraycopy, _checkcast_arraycopy_uninit; 216 static address _unsafe_arraycopy; 217 static address _generic_arraycopy; 218 219 static address _unsafe_setmemory; 220 221 static address _jbyte_fill; 222 static address _jshort_fill; 223 static address _jint_fill; 224 static address _arrayof_jbyte_fill; 225 static address _arrayof_jshort_fill; 226 static address _arrayof_jint_fill; 227 228 static address _aescrypt_encryptBlock; 229 static address _aescrypt_decryptBlock; 230 static address _cipherBlockChaining_encryptAESCrypt; 231 static address _cipherBlockChaining_decryptAESCrypt; 232 static address _electronicCodeBook_encryptAESCrypt; 233 static address _electronicCodeBook_decryptAESCrypt; 234 static address _counterMode_AESCrypt; 235 static address _galoisCounterMode_AESCrypt; 236 static address _ghash_processBlocks; 237 static address _chacha20Block; 238 static address _base64_encodeBlock; 239 static address _base64_decodeBlock; 240 static address _poly1305_processBlocks; 241 static address _intpoly_montgomeryMult_P256; 242 static address _intpoly_assign; 243 244 static address _md5_implCompress; 245 static address _md5_implCompressMB; 246 static address _sha1_implCompress; 247 static address _sha1_implCompressMB; 248 static address _sha256_implCompress; 249 static address _sha256_implCompressMB; 250 static address _sha512_implCompress; 251 static address _sha512_implCompressMB; 252 static address _sha3_implCompress; 253 static address _sha3_implCompressMB; 254 255 static address _updateBytesCRC32; 256 static address _crc_table_adr; 257 258 static address _string_indexof_array[4]; 259 260 static address _crc32c_table_addr; 261 static address _updateBytesCRC32C; 262 static address _updateBytesAdler32; 263 264 static address _multiplyToLen; 265 static address _squareToLen; 266 static address _mulAdd; 267 static address _montgomeryMultiply; 268 static address _montgomerySquare; 269 static address _bigIntegerRightShiftWorker; 270 static address _bigIntegerLeftShiftWorker; 271 272 static address _vectorizedMismatch; 273 274 static address _dexp; 275 static address _dlog; 276 static address _dlog10; 277 static address _dpow; 278 static address _dsin; 279 static address _dcos; 280 static address _dlibm_sin_cos_huge; 281 static address _dlibm_reduce_pi04l; 282 static address _dlibm_tan_cot_huge; 283 static address _dtan; 284 static address _dtanh; 285 static address _fmod; 286 287 static address _f2hf; 288 static address _hf2f; 289 290 static address _method_entry_barrier; 291 292 static address _cont_thaw; 293 static address _cont_returnBarrier; 294 static address _cont_returnBarrierExc; 295 static address _cont_preempt_stub; 296 297 // Vector Math Routines 298 static address _vector_f_math[VectorSupport::NUM_VEC_SIZES][VectorSupport::NUM_VECTOR_OP_MATH]; 299 static address _vector_d_math[VectorSupport::NUM_VEC_SIZES][VectorSupport::NUM_VECTOR_OP_MATH]; 300 301 static address _upcall_stub_exception_handler; 302 static address _upcall_stub_load_target; 303 304 static address _lookup_secondary_supers_table_stubs[]; 305 static address _lookup_secondary_supers_table_slow_path_stub; 306 307 public: 308 // Initialization/Testing 309 static void initialize_initial_stubs(); // must happen before universe::genesis 310 static void initialize_continuation_stubs(); // must happen after universe::genesis 311 static void initialize_compiler_stubs(); // must happen after universe::genesis 312 static void initialize_final_stubs(); // must happen after universe::genesis 313 314 static bool is_stub_code(address addr) { return contains(addr); } 315 316 static bool contains(address addr) { 317 return 318 (_initial_stubs_code != nullptr && _initial_stubs_code->blob_contains(addr)) || 319 (_continuation_stubs_code != nullptr && _continuation_stubs_code->blob_contains(addr)) || 320 (_compiler_stubs_code != nullptr && _compiler_stubs_code->blob_contains(addr)) || 321 (_final_stubs_code != nullptr && _final_stubs_code->blob_contains(addr)) ; 322 } 323 324 static RuntimeBlob* initial_stubs_code() { return _initial_stubs_code; } 325 static RuntimeBlob* continuation_stubs_code() { return _continuation_stubs_code; } 326 static RuntimeBlob* compiler_stubs_code() { return _compiler_stubs_code; } 327 static RuntimeBlob* final_stubs_code() { return _final_stubs_code; } 328 329 // Debugging 330 static jint verify_oop_count() { return _verify_oop_count; } 331 static jint* verify_oop_count_addr() { return &_verify_oop_count; } 332 // a subroutine for debugging the GC 333 static address verify_oop_subroutine_entry_address() { return (address)&_verify_oop_subroutine_entry; } 334 335 static address catch_exception_entry() { return _catch_exception_entry; } 336 337 // Calls to Java 338 typedef void (*CallStub)( 339 address link, 340 intptr_t* result, 341 int result_type, /* BasicType on 4 bytes */ 342 Method* method, 343 address entry_point, 344 intptr_t* parameters, 345 int size_of_parameters, 346 TRAPS 347 ); 348 349 static CallStub call_stub() { return CAST_TO_FN_PTR(CallStub, _call_stub_entry); } 350 351 // Exceptions 352 static address forward_exception_entry() { return _forward_exception_entry; } 353 354 static address atomic_xchg_entry() { return _atomic_xchg_entry; } 355 static address atomic_cmpxchg_entry() { return _atomic_cmpxchg_entry; } 356 static address atomic_cmpxchg_long_entry() { return _atomic_cmpxchg_long_entry; } 357 static address atomic_add_entry() { return _atomic_add_entry; } 358 static address fence_entry() { return _fence_entry; } 359 360 static address select_arraycopy_function(BasicType t, bool aligned, bool disjoint, const char* &name, bool dest_uninitialized); 361 362 static address jbyte_arraycopy() { return _jbyte_arraycopy; } 363 static address jshort_arraycopy() { return _jshort_arraycopy; } 364 static address jint_arraycopy() { return _jint_arraycopy; } 365 static address jlong_arraycopy() { return _jlong_arraycopy; } 366 static address oop_arraycopy(bool dest_uninitialized = false) { 367 return dest_uninitialized ? _oop_arraycopy_uninit : _oop_arraycopy; 368 } 369 static address jbyte_disjoint_arraycopy() { return _jbyte_disjoint_arraycopy; } 370 static address jshort_disjoint_arraycopy() { return _jshort_disjoint_arraycopy; } 371 static address jint_disjoint_arraycopy() { return _jint_disjoint_arraycopy; } 372 static address jlong_disjoint_arraycopy() { return _jlong_disjoint_arraycopy; } 373 static address oop_disjoint_arraycopy(bool dest_uninitialized = false) { 374 return dest_uninitialized ? _oop_disjoint_arraycopy_uninit : _oop_disjoint_arraycopy; 375 } 376 377 static address arrayof_jbyte_arraycopy() { return _arrayof_jbyte_arraycopy; } 378 static address arrayof_jshort_arraycopy() { return _arrayof_jshort_arraycopy; } 379 static address arrayof_jint_arraycopy() { return _arrayof_jint_arraycopy; } 380 static address arrayof_jlong_arraycopy() { return _arrayof_jlong_arraycopy; } 381 static address arrayof_oop_arraycopy(bool dest_uninitialized = false) { 382 return dest_uninitialized ? _arrayof_oop_arraycopy_uninit : _arrayof_oop_arraycopy; 383 } 384 385 static address arrayof_jbyte_disjoint_arraycopy() { return _arrayof_jbyte_disjoint_arraycopy; } 386 static address arrayof_jshort_disjoint_arraycopy() { return _arrayof_jshort_disjoint_arraycopy; } 387 static address arrayof_jint_disjoint_arraycopy() { return _arrayof_jint_disjoint_arraycopy; } 388 static address arrayof_jlong_disjoint_arraycopy() { return _arrayof_jlong_disjoint_arraycopy; } 389 static address arrayof_oop_disjoint_arraycopy(bool dest_uninitialized = false) { 390 return dest_uninitialized ? _arrayof_oop_disjoint_arraycopy_uninit : _arrayof_oop_disjoint_arraycopy; 391 } 392 static address data_cache_writeback() { return _data_cache_writeback; } 393 static address data_cache_writeback_sync() { return _data_cache_writeback_sync; } 394 395 typedef void (*DataCacheWritebackStub)(void *); 396 static DataCacheWritebackStub DataCacheWriteback_stub() { return CAST_TO_FN_PTR(DataCacheWritebackStub, _data_cache_writeback); } 397 typedef void (*DataCacheWritebackSyncStub)(bool); 398 static DataCacheWritebackSyncStub DataCacheWritebackSync_stub() { return CAST_TO_FN_PTR(DataCacheWritebackSyncStub, _data_cache_writeback_sync); } 399 400 static address checkcast_arraycopy(bool dest_uninitialized = false) { 401 return dest_uninitialized ? _checkcast_arraycopy_uninit : _checkcast_arraycopy; 402 } 403 static address unsafe_arraycopy() { return _unsafe_arraycopy; } 404 405 typedef void (*UnsafeArrayCopyStub)(const void* src, void* dst, size_t count); 406 static UnsafeArrayCopyStub UnsafeArrayCopy_stub() { return CAST_TO_FN_PTR(UnsafeArrayCopyStub, _unsafe_arraycopy); } 407 408 static address unsafe_setmemory() { return _unsafe_setmemory; } 409 410 typedef void (*UnsafeSetMemoryStub)(void* dst, size_t count, char byte); 411 static UnsafeSetMemoryStub UnsafeSetMemory_stub() { return CAST_TO_FN_PTR(UnsafeSetMemoryStub, _unsafe_setmemory); } 412 413 static address generic_arraycopy() { return _generic_arraycopy; } 414 static address select_arraysort_function() { return _array_sort; } 415 static address select_array_partition_function() { return _array_partition; } 416 417 static address jbyte_fill() { return _jbyte_fill; } 418 static address jshort_fill() { return _jshort_fill; } 419 static address jint_fill() { return _jint_fill; } 420 static address arrayof_jbyte_fill() { return _arrayof_jbyte_fill; } 421 static address arrayof_jshort_fill() { return _arrayof_jshort_fill; } 422 static address arrayof_jint_fill() { return _arrayof_jint_fill; } 423 424 static address aescrypt_encryptBlock() { return _aescrypt_encryptBlock; } 425 static address aescrypt_decryptBlock() { return _aescrypt_decryptBlock; } 426 static address cipherBlockChaining_encryptAESCrypt() { return _cipherBlockChaining_encryptAESCrypt; } 427 static address cipherBlockChaining_decryptAESCrypt() { return _cipherBlockChaining_decryptAESCrypt; } 428 static address electronicCodeBook_encryptAESCrypt() { return _electronicCodeBook_encryptAESCrypt; } 429 static address electronicCodeBook_decryptAESCrypt() { return _electronicCodeBook_decryptAESCrypt; } 430 static address poly1305_processBlocks() { return _poly1305_processBlocks; } 431 static address intpoly_montgomeryMult_P256() { return _intpoly_montgomeryMult_P256; } 432 static address intpoly_assign() { return _intpoly_assign; } 433 static address counterMode_AESCrypt() { return _counterMode_AESCrypt; } 434 static address ghash_processBlocks() { return _ghash_processBlocks; } 435 static address chacha20Block() { return _chacha20Block; } 436 static address base64_encodeBlock() { return _base64_encodeBlock; } 437 static address base64_decodeBlock() { return _base64_decodeBlock; } 438 static address md5_implCompress() { return _md5_implCompress; } 439 static address md5_implCompressMB() { return _md5_implCompressMB; } 440 static address sha1_implCompress() { return _sha1_implCompress; } 441 static address sha1_implCompressMB() { return _sha1_implCompressMB; } 442 static address sha256_implCompress() { return _sha256_implCompress; } 443 static address sha256_implCompressMB() { return _sha256_implCompressMB; } 444 static address sha512_implCompress() { return _sha512_implCompress; } 445 static address sha512_implCompressMB() { return _sha512_implCompressMB; } 446 static address sha3_implCompress() { return _sha3_implCompress; } 447 static address sha3_implCompressMB() { return _sha3_implCompressMB; } 448 449 static address updateBytesCRC32() { return _updateBytesCRC32; } 450 static address crc_table_addr() { return _crc_table_adr; } 451 452 static address crc32c_table_addr() { return _crc32c_table_addr; } 453 static address updateBytesCRC32C() { return _updateBytesCRC32C; } 454 static address updateBytesAdler32() { return _updateBytesAdler32; } 455 456 static address multiplyToLen() { return _multiplyToLen; } 457 static address squareToLen() { return _squareToLen; } 458 static address mulAdd() { return _mulAdd; } 459 static address montgomeryMultiply() { return _montgomeryMultiply; } 460 static address montgomerySquare() { return _montgomerySquare; } 461 static address bigIntegerRightShift() { return _bigIntegerRightShiftWorker; } 462 static address bigIntegerLeftShift() { return _bigIntegerLeftShiftWorker; } 463 static address galoisCounterMode_AESCrypt() { return _galoisCounterMode_AESCrypt; } 464 465 static address vectorizedMismatch() { return _vectorizedMismatch; } 466 467 static address dexp() { return _dexp; } 468 static address dlog() { return _dlog; } 469 static address dlog10() { return _dlog10; } 470 static address dpow() { return _dpow; } 471 static address fmod() { return _fmod; } 472 static address dsin() { return _dsin; } 473 static address dcos() { return _dcos; } 474 static address dlibm_reduce_pi04l() { return _dlibm_reduce_pi04l; } 475 static address dlibm_sin_cos_huge() { return _dlibm_sin_cos_huge; } 476 static address dlibm_tan_cot_huge() { return _dlibm_tan_cot_huge; } 477 static address dtan() { return _dtan; } 478 static address dtanh() { return _dtanh; } 479 480 // These are versions of the java.lang.Float::floatToFloat16() and float16ToFloat() 481 // methods which perform the same operations as the intrinsic version. 482 // They are used for constant folding in JIT compiler to ensure equivalence. 483 // 484 static address f2hf_adr() { return _f2hf; } 485 static address hf2f_adr() { return _hf2f; } 486 487 static jshort f2hf(jfloat x) { 488 assert(_f2hf != nullptr, "stub is not implemented on this platform"); 489 MACOS_AARCH64_ONLY(ThreadWXEnable wx(WXExec, Thread::current());) // About to call into code cache 490 typedef jshort (*f2hf_stub_t)(jfloat x); 491 return ((f2hf_stub_t)_f2hf)(x); 492 } 493 static jfloat hf2f(jshort x) { 494 assert(_hf2f != nullptr, "stub is not implemented on this platform"); 495 MACOS_AARCH64_ONLY(ThreadWXEnable wx(WXExec, Thread::current());) // About to call into code cache 496 typedef jfloat (*hf2f_stub_t)(jshort x); 497 return ((hf2f_stub_t)_hf2f)(x); 498 } 499 500 static address method_entry_barrier() { return _method_entry_barrier; } 501 502 static address cont_thaw() { return _cont_thaw; } 503 static address cont_returnBarrier() { return _cont_returnBarrier; } 504 static address cont_returnBarrierExc(){return _cont_returnBarrierExc; } 505 static address cont_preempt_stub() { return _cont_preempt_stub; } 506 507 static address upcall_stub_exception_handler() { 508 assert(_upcall_stub_exception_handler != nullptr, "not implemented"); 509 return _upcall_stub_exception_handler; 510 } 511 512 static address upcall_stub_load_target() { 513 assert(_upcall_stub_load_target != nullptr, "not implemented"); 514 return _upcall_stub_load_target; 515 } 516 517 static address lookup_secondary_supers_table_stub(u1 slot) { 518 assert(slot < Klass::SECONDARY_SUPERS_TABLE_SIZE, "out of bounds"); 519 assert(_lookup_secondary_supers_table_stubs[slot] != nullptr, "not implemented"); 520 return _lookup_secondary_supers_table_stubs[slot]; 521 } 522 523 static address lookup_secondary_supers_table_slow_path_stub() { 524 assert(_lookup_secondary_supers_table_slow_path_stub != nullptr, "not implemented"); 525 return _lookup_secondary_supers_table_slow_path_stub; 526 } 527 528 static address select_fill_function(BasicType t, bool aligned, const char* &name); 529 530 // 531 // Default versions of the above arraycopy functions for platforms which do 532 // not have specialized versions 533 // 534 static void jbyte_copy (jbyte* src, jbyte* dest, size_t count); 535 static void jshort_copy (jshort* src, jshort* dest, size_t count); 536 static void jint_copy (jint* src, jint* dest, size_t count); 537 static void jlong_copy (jlong* src, jlong* dest, size_t count); 538 static void oop_copy (oop* src, oop* dest, size_t count); 539 static void oop_copy_uninit(oop* src, oop* dest, size_t count); 540 541 static void arrayof_jbyte_copy (HeapWord* src, HeapWord* dest, size_t count); 542 static void arrayof_jshort_copy (HeapWord* src, HeapWord* dest, size_t count); 543 static void arrayof_jint_copy (HeapWord* src, HeapWord* dest, size_t count); 544 static void arrayof_jlong_copy (HeapWord* src, HeapWord* dest, size_t count); 545 static void arrayof_oop_copy (HeapWord* src, HeapWord* dest, size_t count); 546 static void arrayof_oop_copy_uninit(HeapWord* src, HeapWord* dest, size_t count); 547 }; 548 549 #endif // SHARE_RUNTIME_STUBROUTINES_HPP