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 #include "precompiled.hpp" 26 #include "asm/codeBuffer.hpp" 27 #include "asm/macroAssembler.inline.hpp" 28 #include "memory/resourceArea.hpp" 29 #include "oops/access.inline.hpp" 30 #include "oops/klass.hpp" 31 #include "oops/oop.inline.hpp" 32 #include "prims/vectorSupport.hpp" 33 #include "runtime/continuation.hpp" 34 #include "runtime/interfaceSupport.inline.hpp" 35 #include "runtime/timerTrace.hpp" 36 #include "runtime/sharedRuntime.hpp" 37 #include "runtime/stubRoutines.hpp" 38 #include "utilities/align.hpp" 39 #include "utilities/copy.hpp" 40 #ifdef COMPILER2 41 #include "opto/runtime.hpp" 42 #endif 43 44 UnsafeMemoryAccess* UnsafeMemoryAccess::_table = nullptr; 45 int UnsafeMemoryAccess::_table_length = 0; 46 int UnsafeMemoryAccess::_table_max_length = 0; 47 address UnsafeMemoryAccess::_common_exit_stub_pc = nullptr; 48 49 // Implementation of StubRoutines - for a description 50 // of how to extend it, see the header file. 51 52 // Class Variables 53 54 BufferBlob* StubRoutines::_initial_stubs_code = nullptr; 55 BufferBlob* StubRoutines::_final_stubs_code = nullptr; 56 BufferBlob* StubRoutines::_compiler_stubs_code = nullptr; 57 BufferBlob* StubRoutines::_continuation_stubs_code = nullptr; 58 59 address StubRoutines::_call_stub_return_address = nullptr; 60 address StubRoutines::_call_stub_entry = nullptr; 61 62 address StubRoutines::_catch_exception_entry = nullptr; 63 address StubRoutines::_forward_exception_entry = nullptr; 64 jint StubRoutines::_verify_oop_count = 0; 65 address StubRoutines::_verify_oop_subroutine_entry = nullptr; 66 address StubRoutines::_atomic_xchg_entry = nullptr; 67 address StubRoutines::_atomic_cmpxchg_entry = nullptr; 68 address StubRoutines::_atomic_cmpxchg_long_entry = nullptr; 69 address StubRoutines::_atomic_add_entry = nullptr; 70 address StubRoutines::_fence_entry = nullptr; 71 72 // Compiled code entry points default values 73 // The default functions don't have separate disjoint versions. 74 address StubRoutines::_jbyte_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::jbyte_copy); 75 address StubRoutines::_jshort_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::jshort_copy); 76 address StubRoutines::_jint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::jint_copy); 77 address StubRoutines::_jlong_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::jlong_copy); 78 address StubRoutines::_oop_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::oop_copy); 79 address StubRoutines::_oop_arraycopy_uninit = CAST_FROM_FN_PTR(address, StubRoutines::oop_copy_uninit); 80 address StubRoutines::_jbyte_disjoint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::jbyte_copy); 81 address StubRoutines::_jshort_disjoint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::jshort_copy); 82 address StubRoutines::_jint_disjoint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::jint_copy); 83 address StubRoutines::_jlong_disjoint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::jlong_copy); 84 address StubRoutines::_oop_disjoint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::oop_copy); 85 address StubRoutines::_oop_disjoint_arraycopy_uninit = CAST_FROM_FN_PTR(address, StubRoutines::oop_copy_uninit); 86 87 address StubRoutines::_arrayof_jbyte_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_jbyte_copy); 88 address StubRoutines::_arrayof_jshort_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_jshort_copy); 89 address StubRoutines::_arrayof_jint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_jint_copy); 90 address StubRoutines::_arrayof_jlong_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_jlong_copy); 91 address StubRoutines::_arrayof_oop_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_oop_copy); 92 address StubRoutines::_arrayof_oop_arraycopy_uninit = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_oop_copy_uninit); 93 address StubRoutines::_arrayof_jbyte_disjoint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_jbyte_copy); 94 address StubRoutines::_arrayof_jshort_disjoint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_jshort_copy); 95 address StubRoutines::_arrayof_jint_disjoint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_jint_copy); 96 address StubRoutines::_arrayof_jlong_disjoint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_jlong_copy); 97 address StubRoutines::_arrayof_oop_disjoint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_oop_copy); 98 address StubRoutines::_arrayof_oop_disjoint_arraycopy_uninit = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_oop_copy_uninit); 99 100 address StubRoutines::_data_cache_writeback = nullptr; 101 address StubRoutines::_data_cache_writeback_sync = nullptr; 102 103 address StubRoutines::_checkcast_arraycopy = nullptr; 104 address StubRoutines::_checkcast_arraycopy_uninit = nullptr; 105 address StubRoutines::_unsafe_arraycopy = nullptr; 106 address StubRoutines::_generic_arraycopy = nullptr; 107 108 address StubRoutines::_unsafe_setmemory = nullptr; 109 110 address StubRoutines::_jbyte_fill; 111 address StubRoutines::_jshort_fill; 112 address StubRoutines::_jint_fill; 113 address StubRoutines::_arrayof_jbyte_fill; 114 address StubRoutines::_arrayof_jshort_fill; 115 address StubRoutines::_arrayof_jint_fill; 116 117 address StubRoutines::_aescrypt_encryptBlock = nullptr; 118 address StubRoutines::_aescrypt_decryptBlock = nullptr; 119 address StubRoutines::_cipherBlockChaining_encryptAESCrypt = nullptr; 120 address StubRoutines::_cipherBlockChaining_decryptAESCrypt = nullptr; 121 address StubRoutines::_electronicCodeBook_encryptAESCrypt = nullptr; 122 address StubRoutines::_electronicCodeBook_decryptAESCrypt = nullptr; 123 address StubRoutines::_counterMode_AESCrypt = nullptr; 124 address StubRoutines::_galoisCounterMode_AESCrypt = nullptr; 125 address StubRoutines::_ghash_processBlocks = nullptr; 126 address StubRoutines::_chacha20Block = nullptr; 127 address StubRoutines::_base64_encodeBlock = nullptr; 128 address StubRoutines::_base64_decodeBlock = nullptr; 129 address StubRoutines::_poly1305_processBlocks = nullptr; 130 address StubRoutines::_intpoly_montgomeryMult_P256 = nullptr; 131 address StubRoutines::_intpoly_assign = nullptr; 132 133 address StubRoutines::_md5_implCompress = nullptr; 134 address StubRoutines::_md5_implCompressMB = nullptr; 135 address StubRoutines::_sha1_implCompress = nullptr; 136 address StubRoutines::_sha1_implCompressMB = nullptr; 137 address StubRoutines::_sha256_implCompress = nullptr; 138 address StubRoutines::_sha256_implCompressMB = nullptr; 139 address StubRoutines::_sha512_implCompress = nullptr; 140 address StubRoutines::_sha512_implCompressMB = nullptr; 141 address StubRoutines::_sha3_implCompress = nullptr; 142 address StubRoutines::_sha3_implCompressMB = nullptr; 143 144 address StubRoutines::_updateBytesCRC32 = nullptr; 145 address StubRoutines::_crc_table_adr = nullptr; 146 147 address StubRoutines::_string_indexof_array[4] = { nullptr }; 148 149 address StubRoutines::_crc32c_table_addr = nullptr; 150 address StubRoutines::_updateBytesCRC32C = nullptr; 151 address StubRoutines::_updateBytesAdler32 = nullptr; 152 153 address StubRoutines::_multiplyToLen = nullptr; 154 address StubRoutines::_squareToLen = nullptr; 155 address StubRoutines::_mulAdd = nullptr; 156 address StubRoutines::_montgomeryMultiply = nullptr; 157 address StubRoutines::_montgomerySquare = nullptr; 158 address StubRoutines::_bigIntegerRightShiftWorker = nullptr; 159 address StubRoutines::_bigIntegerLeftShiftWorker = nullptr; 160 161 address StubRoutines::_vectorizedMismatch = nullptr; 162 163 address StubRoutines::_dexp = nullptr; 164 address StubRoutines::_dlog = nullptr; 165 address StubRoutines::_dlog10 = nullptr; 166 address StubRoutines::_fmod = nullptr; 167 address StubRoutines::_dpow = nullptr; 168 address StubRoutines::_dsin = nullptr; 169 address StubRoutines::_dcos = nullptr; 170 address StubRoutines::_dlibm_sin_cos_huge = nullptr; 171 address StubRoutines::_dlibm_reduce_pi04l = nullptr; 172 address StubRoutines::_dlibm_tan_cot_huge = nullptr; 173 address StubRoutines::_dtan = nullptr; 174 address StubRoutines::_dtanh = nullptr; 175 176 address StubRoutines::_f2hf = nullptr; 177 address StubRoutines::_hf2f = nullptr; 178 179 address StubRoutines::_vector_f_math[VectorSupport::NUM_VEC_SIZES][VectorSupport::NUM_SVML_OP] = {{nullptr}, {nullptr}}; 180 address StubRoutines::_vector_d_math[VectorSupport::NUM_VEC_SIZES][VectorSupport::NUM_SVML_OP] = {{nullptr}, {nullptr}}; 181 182 address StubRoutines::_method_entry_barrier = nullptr; 183 address StubRoutines::_array_sort = nullptr; 184 address StubRoutines::_array_partition = nullptr; 185 186 address StubRoutines::_cont_thaw = nullptr; 187 address StubRoutines::_cont_returnBarrier = nullptr; 188 address StubRoutines::_cont_returnBarrierExc = nullptr; 189 190 address StubRoutines::_upcall_stub_exception_handler = nullptr; 191 address StubRoutines::_upcall_stub_load_target = nullptr; 192 193 address StubRoutines::_lookup_secondary_supers_table_slow_path_stub = nullptr; 194 address StubRoutines::_lookup_secondary_supers_table_stubs[Klass::SECONDARY_SUPERS_TABLE_SIZE] = { nullptr }; 195 196 197 // Initialization 198 // 199 // Note: to break cycle with universe initialization, stubs are generated in two phases. 200 // The first one generates stubs needed during universe init (e.g., _handle_must_compile_first_entry). 201 // The second phase includes all other stubs (which may depend on universe being initialized.) 202 203 extern void StubGenerator_generate(CodeBuffer* code, StubCodeGenerator::StubsKind kind); // only interface to generators 204 205 void UnsafeMemoryAccess::create_table(int max_size) { 206 UnsafeMemoryAccess::_table = new UnsafeMemoryAccess[max_size]; 207 UnsafeMemoryAccess::_table_max_length = max_size; 208 } 209 210 bool UnsafeMemoryAccess::contains_pc(address pc) { 211 for (int i = 0; i < UnsafeMemoryAccess::_table_length; i++) { 212 UnsafeMemoryAccess* entry = &UnsafeMemoryAccess::_table[i]; 213 if (pc >= entry->start_pc() && pc < entry->end_pc()) { 214 return true; 215 } 216 } 217 return false; 218 } 219 220 address UnsafeMemoryAccess::page_error_continue_pc(address pc) { 221 for (int i = 0; i < UnsafeMemoryAccess::_table_length; i++) { 222 UnsafeMemoryAccess* entry = &UnsafeMemoryAccess::_table[i]; 223 if (pc >= entry->start_pc() && pc < entry->end_pc()) { 224 return entry->error_exit_pc(); 225 } 226 } 227 return nullptr; 228 } 229 230 231 static BufferBlob* initialize_stubs(StubCodeGenerator::StubsKind kind, 232 int code_size, int max_aligned_stubs, 233 const char* timer_msg, 234 const char* buffer_name, 235 const char* assert_msg) { 236 ResourceMark rm; 237 TraceTime timer(timer_msg, TRACETIME_LOG(Info, startuptime)); 238 // Add extra space for large CodeEntryAlignment 239 int size = code_size + CodeEntryAlignment * max_aligned_stubs; 240 BufferBlob* stubs_code = BufferBlob::create(buffer_name, size); 241 if (stubs_code == nullptr) { 242 vm_exit_out_of_memory(code_size, OOM_MALLOC_ERROR, "CodeCache: no room for %s", buffer_name); 243 } 244 CodeBuffer buffer(stubs_code); 245 StubGenerator_generate(&buffer, kind); 246 // When new stubs added we need to make sure there is some space left 247 // to catch situation when we should increase size again. 248 assert(code_size == 0 || buffer.insts_remaining() > 200, "increase %s", assert_msg); 249 250 LogTarget(Info, stubs) lt; 251 if (lt.is_enabled()) { 252 LogStream ls(lt); 253 ls.print_cr("%s\t [" INTPTR_FORMAT ", " INTPTR_FORMAT "] used: %d, free: %d", 254 buffer_name, p2i(stubs_code->content_begin()), p2i(stubs_code->content_end()), 255 buffer.total_content_size(), buffer.insts_remaining()); 256 } 257 return stubs_code; 258 } 259 260 void StubRoutines::initialize_initial_stubs() { 261 if (_initial_stubs_code == nullptr) { 262 _initial_stubs_code = initialize_stubs(StubCodeGenerator::Initial_stubs, 263 _initial_stubs_code_size, 10, 264 "StubRoutines generation initial stubs", 265 "StubRoutines (initial stubs)", 266 "_initial_stubs_code_size"); 267 } 268 } 269 270 void StubRoutines::initialize_continuation_stubs() { 271 if (_continuation_stubs_code == nullptr) { 272 _continuation_stubs_code = initialize_stubs(StubCodeGenerator::Continuation_stubs, 273 _continuation_stubs_code_size, 10, 274 "StubRoutines generation continuation stubs", 275 "StubRoutines (continuation stubs)", 276 "_continuation_stubs_code_size"); 277 } 278 } 279 280 void StubRoutines::initialize_compiler_stubs() { 281 if (_compiler_stubs_code == nullptr) { 282 _compiler_stubs_code = initialize_stubs(StubCodeGenerator::Compiler_stubs, 283 _compiler_stubs_code_size, 100, 284 "StubRoutines generation compiler stubs", 285 "StubRoutines (compiler stubs)", 286 "_compiler_stubs_code_size"); 287 } 288 } 289 290 void StubRoutines::initialize_final_stubs() { 291 if (_final_stubs_code == nullptr) { 292 _final_stubs_code = initialize_stubs(StubCodeGenerator::Final_stubs, 293 _final_stubs_code_size, 10, 294 "StubRoutines generation final stubs", 295 "StubRoutines (final stubs)", 296 "_final_stubs_code_size"); 297 } 298 } 299 300 void initial_stubs_init() { StubRoutines::initialize_initial_stubs(); } 301 void continuation_stubs_init() { StubRoutines::initialize_continuation_stubs(); } 302 void final_stubs_init() { StubRoutines::initialize_final_stubs(); } 303 304 void compiler_stubs_init(bool in_compiler_thread) { 305 if (in_compiler_thread && DelayCompilerStubsGeneration) { 306 // Temporarily revert state of stubs generation because 307 // it is called after final_stubs_init() finished 308 // during compiler runtime initialization. 309 // It is fine because these stubs are only used by 310 // compiled code and compiler is not running yet. 311 StubCodeDesc::unfreeze(); 312 StubRoutines::initialize_compiler_stubs(); 313 StubCodeDesc::freeze(); 314 } else if (!in_compiler_thread && !DelayCompilerStubsGeneration) { 315 StubRoutines::initialize_compiler_stubs(); 316 } 317 } 318 319 // 320 // Default versions of arraycopy functions 321 // 322 323 JRT_LEAF(void, StubRoutines::jbyte_copy(jbyte* src, jbyte* dest, size_t count)) 324 #ifndef PRODUCT 325 SharedRuntime::_jbyte_array_copy_ctr++; // Slow-path byte array copy 326 #endif // !PRODUCT 327 Copy::conjoint_jbytes_atomic(src, dest, count); 328 JRT_END 329 330 JRT_LEAF(void, StubRoutines::jshort_copy(jshort* src, jshort* dest, size_t count)) 331 #ifndef PRODUCT 332 SharedRuntime::_jshort_array_copy_ctr++; // Slow-path short/char array copy 333 #endif // !PRODUCT 334 Copy::conjoint_jshorts_atomic(src, dest, count); 335 JRT_END 336 337 JRT_LEAF(void, StubRoutines::jint_copy(jint* src, jint* dest, size_t count)) 338 #ifndef PRODUCT 339 SharedRuntime::_jint_array_copy_ctr++; // Slow-path int/float array copy 340 #endif // !PRODUCT 341 Copy::conjoint_jints_atomic(src, dest, count); 342 JRT_END 343 344 JRT_LEAF(void, StubRoutines::jlong_copy(jlong* src, jlong* dest, size_t count)) 345 #ifndef PRODUCT 346 SharedRuntime::_jlong_array_copy_ctr++; // Slow-path long/double array copy 347 #endif // !PRODUCT 348 Copy::conjoint_jlongs_atomic(src, dest, count); 349 JRT_END 350 351 JRT_LEAF(void, StubRoutines::oop_copy(oop* src, oop* dest, size_t count)) 352 #ifndef PRODUCT 353 SharedRuntime::_oop_array_copy_ctr++; // Slow-path oop array copy 354 #endif // !PRODUCT 355 assert(count != 0, "count should be non-zero"); 356 ArrayAccess<>::oop_arraycopy_raw((HeapWord*)src, (HeapWord*)dest, count); 357 JRT_END 358 359 JRT_LEAF(void, StubRoutines::oop_copy_uninit(oop* src, oop* dest, size_t count)) 360 #ifndef PRODUCT 361 SharedRuntime::_oop_array_copy_ctr++; // Slow-path oop array copy 362 #endif // !PRODUCT 363 assert(count != 0, "count should be non-zero"); 364 ArrayAccess<IS_DEST_UNINITIALIZED>::oop_arraycopy_raw((HeapWord*)src, (HeapWord*)dest, count); 365 JRT_END 366 367 JRT_LEAF(void, StubRoutines::arrayof_jbyte_copy(HeapWord* src, HeapWord* dest, size_t count)) 368 #ifndef PRODUCT 369 SharedRuntime::_jbyte_array_copy_ctr++; // Slow-path byte array copy 370 #endif // !PRODUCT 371 Copy::arrayof_conjoint_jbytes(src, dest, count); 372 JRT_END 373 374 JRT_LEAF(void, StubRoutines::arrayof_jshort_copy(HeapWord* src, HeapWord* dest, size_t count)) 375 #ifndef PRODUCT 376 SharedRuntime::_jshort_array_copy_ctr++; // Slow-path short/char array copy 377 #endif // !PRODUCT 378 Copy::arrayof_conjoint_jshorts(src, dest, count); 379 JRT_END 380 381 JRT_LEAF(void, StubRoutines::arrayof_jint_copy(HeapWord* src, HeapWord* dest, size_t count)) 382 #ifndef PRODUCT 383 SharedRuntime::_jint_array_copy_ctr++; // Slow-path int/float array copy 384 #endif // !PRODUCT 385 Copy::arrayof_conjoint_jints(src, dest, count); 386 JRT_END 387 388 JRT_LEAF(void, StubRoutines::arrayof_jlong_copy(HeapWord* src, HeapWord* dest, size_t count)) 389 #ifndef PRODUCT 390 SharedRuntime::_jlong_array_copy_ctr++; // Slow-path int/float array copy 391 #endif // !PRODUCT 392 Copy::arrayof_conjoint_jlongs(src, dest, count); 393 JRT_END 394 395 JRT_LEAF(void, StubRoutines::arrayof_oop_copy(HeapWord* src, HeapWord* dest, size_t count)) 396 #ifndef PRODUCT 397 SharedRuntime::_oop_array_copy_ctr++; // Slow-path oop array copy 398 #endif // !PRODUCT 399 assert(count != 0, "count should be non-zero"); 400 ArrayAccess<ARRAYCOPY_ARRAYOF>::oop_arraycopy_raw(src, dest, count); 401 JRT_END 402 403 JRT_LEAF(void, StubRoutines::arrayof_oop_copy_uninit(HeapWord* src, HeapWord* dest, size_t count)) 404 #ifndef PRODUCT 405 SharedRuntime::_oop_array_copy_ctr++; // Slow-path oop array copy 406 #endif // !PRODUCT 407 assert(count != 0, "count should be non-zero"); 408 ArrayAccess<ARRAYCOPY_ARRAYOF | IS_DEST_UNINITIALIZED>::oop_arraycopy_raw(src, dest, count); 409 JRT_END 410 411 address StubRoutines::select_fill_function(BasicType t, bool aligned, const char* &name) { 412 #define RETURN_STUB(xxx_fill) { \ 413 name = #xxx_fill; \ 414 return StubRoutines::xxx_fill(); } 415 416 switch (t) { 417 case T_BYTE: 418 case T_BOOLEAN: 419 if (!aligned) RETURN_STUB(jbyte_fill); 420 RETURN_STUB(arrayof_jbyte_fill); 421 case T_CHAR: 422 case T_SHORT: 423 if (!aligned) RETURN_STUB(jshort_fill); 424 RETURN_STUB(arrayof_jshort_fill); 425 case T_INT: 426 case T_FLOAT: 427 if (!aligned) RETURN_STUB(jint_fill); 428 RETURN_STUB(arrayof_jint_fill); 429 case T_DOUBLE: 430 case T_LONG: 431 case T_ARRAY: 432 case T_OBJECT: 433 case T_NARROWOOP: 434 case T_NARROWKLASS: 435 case T_ADDRESS: 436 case T_VOID: 437 // Currently unsupported 438 return nullptr; 439 440 default: 441 ShouldNotReachHere(); 442 return nullptr; 443 } 444 445 #undef RETURN_STUB 446 } 447 448 // constants for computing the copy function 449 enum { 450 COPYFUNC_UNALIGNED = 0, 451 COPYFUNC_ALIGNED = 1, // src, dest aligned to HeapWordSize 452 COPYFUNC_CONJOINT = 0, 453 COPYFUNC_DISJOINT = 2 // src != dest, or transfer can descend 454 }; 455 456 // Note: The condition "disjoint" applies also for overlapping copies 457 // where an descending copy is permitted (i.e., dest_offset <= src_offset). 458 address 459 StubRoutines::select_arraycopy_function(BasicType t, bool aligned, bool disjoint, const char* &name, bool dest_uninitialized) { 460 int selector = 461 (aligned ? COPYFUNC_ALIGNED : COPYFUNC_UNALIGNED) + 462 (disjoint ? COPYFUNC_DISJOINT : COPYFUNC_CONJOINT); 463 464 #define RETURN_STUB(xxx_arraycopy) { \ 465 name = #xxx_arraycopy; \ 466 return StubRoutines::xxx_arraycopy(); } 467 468 #define RETURN_STUB_PARM(xxx_arraycopy, parm) { \ 469 name = parm ? #xxx_arraycopy "_uninit": #xxx_arraycopy; \ 470 return StubRoutines::xxx_arraycopy(parm); } 471 472 switch (t) { 473 case T_BYTE: 474 case T_BOOLEAN: 475 switch (selector) { 476 case COPYFUNC_CONJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jbyte_arraycopy); 477 case COPYFUNC_CONJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jbyte_arraycopy); 478 case COPYFUNC_DISJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jbyte_disjoint_arraycopy); 479 case COPYFUNC_DISJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jbyte_disjoint_arraycopy); 480 } 481 case T_CHAR: 482 case T_SHORT: 483 switch (selector) { 484 case COPYFUNC_CONJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jshort_arraycopy); 485 case COPYFUNC_CONJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jshort_arraycopy); 486 case COPYFUNC_DISJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jshort_disjoint_arraycopy); 487 case COPYFUNC_DISJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jshort_disjoint_arraycopy); 488 } 489 case T_INT: 490 case T_FLOAT: 491 switch (selector) { 492 case COPYFUNC_CONJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jint_arraycopy); 493 case COPYFUNC_CONJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jint_arraycopy); 494 case COPYFUNC_DISJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jint_disjoint_arraycopy); 495 case COPYFUNC_DISJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jint_disjoint_arraycopy); 496 } 497 case T_DOUBLE: 498 case T_LONG: 499 switch (selector) { 500 case COPYFUNC_CONJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jlong_arraycopy); 501 case COPYFUNC_CONJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jlong_arraycopy); 502 case COPYFUNC_DISJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jlong_disjoint_arraycopy); 503 case COPYFUNC_DISJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jlong_disjoint_arraycopy); 504 } 505 case T_ARRAY: 506 case T_OBJECT: 507 switch (selector) { 508 case COPYFUNC_CONJOINT | COPYFUNC_UNALIGNED: RETURN_STUB_PARM(oop_arraycopy, dest_uninitialized); 509 case COPYFUNC_CONJOINT | COPYFUNC_ALIGNED: RETURN_STUB_PARM(arrayof_oop_arraycopy, dest_uninitialized); 510 case COPYFUNC_DISJOINT | COPYFUNC_UNALIGNED: RETURN_STUB_PARM(oop_disjoint_arraycopy, dest_uninitialized); 511 case COPYFUNC_DISJOINT | COPYFUNC_ALIGNED: RETURN_STUB_PARM(arrayof_oop_disjoint_arraycopy, dest_uninitialized); 512 } 513 default: 514 ShouldNotReachHere(); 515 return nullptr; 516 } 517 518 #undef RETURN_STUB 519 #undef RETURN_STUB_PARM 520 } 521 522 UnsafeMemoryAccessMark::UnsafeMemoryAccessMark(StubCodeGenerator* cgen, bool add_entry, bool continue_at_scope_end, address error_exit_pc) { 523 _cgen = cgen; 524 _ucm_entry = nullptr; 525 if (add_entry) { 526 address err_exit_pc = nullptr; 527 if (!continue_at_scope_end) { 528 err_exit_pc = error_exit_pc != nullptr ? error_exit_pc : UnsafeMemoryAccess::common_exit_stub_pc(); 529 } 530 assert(err_exit_pc != nullptr || continue_at_scope_end, "error exit not set"); 531 _ucm_entry = UnsafeMemoryAccess::add_to_table(_cgen->assembler()->pc(), nullptr, err_exit_pc); 532 } 533 } 534 535 UnsafeMemoryAccessMark::~UnsafeMemoryAccessMark() { 536 if (_ucm_entry != nullptr) { 537 _ucm_entry->set_end_pc(_cgen->assembler()->pc()); 538 if (_ucm_entry->error_exit_pc() == nullptr) { 539 _ucm_entry->set_error_exit_pc(_cgen->assembler()->pc()); 540 } 541 } 542 }