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 address StubRoutines::_throw_AbstractMethodError_entry = nullptr; 65 address StubRoutines::_throw_IncompatibleClassChangeError_entry = nullptr; 66 address StubRoutines::_throw_NullPointerException_at_call_entry = nullptr; 67 address StubRoutines::_throw_StackOverflowError_entry = nullptr; 68 address StubRoutines::_throw_delayed_StackOverflowError_entry = nullptr; 69 jint StubRoutines::_verify_oop_count = 0; 70 address StubRoutines::_verify_oop_subroutine_entry = nullptr; 71 address StubRoutines::_atomic_xchg_entry = nullptr; 72 address StubRoutines::_atomic_cmpxchg_entry = nullptr; 73 address StubRoutines::_atomic_cmpxchg_long_entry = nullptr; 74 address StubRoutines::_atomic_add_entry = nullptr; 75 address StubRoutines::_fence_entry = nullptr; 76 77 // Compiled code entry points default values 78 // The default functions don't have separate disjoint versions. 79 address StubRoutines::_jbyte_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::jbyte_copy); 80 address StubRoutines::_jshort_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::jshort_copy); 81 address StubRoutines::_jint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::jint_copy); 82 address StubRoutines::_jlong_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::jlong_copy); 83 address StubRoutines::_oop_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::oop_copy); 84 address StubRoutines::_oop_arraycopy_uninit = CAST_FROM_FN_PTR(address, StubRoutines::oop_copy_uninit); 85 address StubRoutines::_jbyte_disjoint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::jbyte_copy); 86 address StubRoutines::_jshort_disjoint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::jshort_copy); 87 address StubRoutines::_jint_disjoint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::jint_copy); 88 address StubRoutines::_jlong_disjoint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::jlong_copy); 89 address StubRoutines::_oop_disjoint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::oop_copy); 90 address StubRoutines::_oop_disjoint_arraycopy_uninit = CAST_FROM_FN_PTR(address, StubRoutines::oop_copy_uninit); 91 92 address StubRoutines::_arrayof_jbyte_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_jbyte_copy); 93 address StubRoutines::_arrayof_jshort_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_jshort_copy); 94 address StubRoutines::_arrayof_jint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_jint_copy); 95 address StubRoutines::_arrayof_jlong_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_jlong_copy); 96 address StubRoutines::_arrayof_oop_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_oop_copy); 97 address StubRoutines::_arrayof_oop_arraycopy_uninit = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_oop_copy_uninit); 98 address StubRoutines::_arrayof_jbyte_disjoint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_jbyte_copy); 99 address StubRoutines::_arrayof_jshort_disjoint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_jshort_copy); 100 address StubRoutines::_arrayof_jint_disjoint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_jint_copy); 101 address StubRoutines::_arrayof_jlong_disjoint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_jlong_copy); 102 address StubRoutines::_arrayof_oop_disjoint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_oop_copy); 103 address StubRoutines::_arrayof_oop_disjoint_arraycopy_uninit = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_oop_copy_uninit); 104 105 address StubRoutines::_data_cache_writeback = nullptr; 106 address StubRoutines::_data_cache_writeback_sync = nullptr; 107 108 address StubRoutines::_checkcast_arraycopy = nullptr; 109 address StubRoutines::_checkcast_arraycopy_uninit = nullptr; 110 address StubRoutines::_unsafe_arraycopy = nullptr; 111 address StubRoutines::_generic_arraycopy = nullptr; 112 113 address StubRoutines::_unsafe_setmemory = nullptr; 114 115 address StubRoutines::_jbyte_fill; 116 address StubRoutines::_jshort_fill; 117 address StubRoutines::_jint_fill; 118 address StubRoutines::_arrayof_jbyte_fill; 119 address StubRoutines::_arrayof_jshort_fill; 120 address StubRoutines::_arrayof_jint_fill; 121 122 address StubRoutines::_aescrypt_encryptBlock = nullptr; 123 address StubRoutines::_aescrypt_decryptBlock = nullptr; 124 address StubRoutines::_cipherBlockChaining_encryptAESCrypt = nullptr; 125 address StubRoutines::_cipherBlockChaining_decryptAESCrypt = nullptr; 126 address StubRoutines::_electronicCodeBook_encryptAESCrypt = nullptr; 127 address StubRoutines::_electronicCodeBook_decryptAESCrypt = nullptr; 128 address StubRoutines::_counterMode_AESCrypt = nullptr; 129 address StubRoutines::_galoisCounterMode_AESCrypt = nullptr; 130 address StubRoutines::_ghash_processBlocks = nullptr; 131 address StubRoutines::_chacha20Block = nullptr; 132 address StubRoutines::_base64_encodeBlock = nullptr; 133 address StubRoutines::_base64_decodeBlock = nullptr; 134 address StubRoutines::_poly1305_processBlocks = nullptr; 135 address StubRoutines::_intpoly_montgomeryMult_P256 = nullptr; 136 address StubRoutines::_intpoly_assign = nullptr; 137 138 address StubRoutines::_md5_implCompress = nullptr; 139 address StubRoutines::_md5_implCompressMB = nullptr; 140 address StubRoutines::_sha1_implCompress = nullptr; 141 address StubRoutines::_sha1_implCompressMB = nullptr; 142 address StubRoutines::_sha256_implCompress = nullptr; 143 address StubRoutines::_sha256_implCompressMB = nullptr; 144 address StubRoutines::_sha512_implCompress = nullptr; 145 address StubRoutines::_sha512_implCompressMB = nullptr; 146 address StubRoutines::_sha3_implCompress = nullptr; 147 address StubRoutines::_sha3_implCompressMB = nullptr; 148 149 address StubRoutines::_updateBytesCRC32 = nullptr; 150 address StubRoutines::_crc_table_adr = nullptr; 151 152 address StubRoutines::_crc32c_table_addr = nullptr; 153 address StubRoutines::_updateBytesCRC32C = nullptr; 154 address StubRoutines::_updateBytesAdler32 = nullptr; 155 156 address StubRoutines::_multiplyToLen = nullptr; 157 address StubRoutines::_squareToLen = nullptr; 158 address StubRoutines::_mulAdd = nullptr; 159 address StubRoutines::_montgomeryMultiply = nullptr; 160 address StubRoutines::_montgomerySquare = nullptr; 161 address StubRoutines::_bigIntegerRightShiftWorker = nullptr; 162 address StubRoutines::_bigIntegerLeftShiftWorker = nullptr; 163 164 address StubRoutines::_vectorizedMismatch = nullptr; 165 166 address StubRoutines::_dexp = nullptr; 167 address StubRoutines::_dlog = nullptr; 168 address StubRoutines::_dlog10 = nullptr; 169 address StubRoutines::_fmod = nullptr; 170 address StubRoutines::_dpow = nullptr; 171 address StubRoutines::_dsin = nullptr; 172 address StubRoutines::_dcos = nullptr; 173 address StubRoutines::_dlibm_sin_cos_huge = nullptr; 174 address StubRoutines::_dlibm_reduce_pi04l = nullptr; 175 address StubRoutines::_dlibm_tan_cot_huge = nullptr; 176 address StubRoutines::_dtan = nullptr; 177 178 address StubRoutines::_f2hf = nullptr; 179 address StubRoutines::_hf2f = nullptr; 180 181 address StubRoutines::_vector_f_math[VectorSupport::NUM_VEC_SIZES][VectorSupport::NUM_SVML_OP] = {{nullptr}, {nullptr}}; 182 address StubRoutines::_vector_d_math[VectorSupport::NUM_VEC_SIZES][VectorSupport::NUM_SVML_OP] = {{nullptr}, {nullptr}}; 183 184 address StubRoutines::_method_entry_barrier = nullptr; 185 address StubRoutines::_array_sort = nullptr; 186 address StubRoutines::_array_partition = nullptr; 187 188 address StubRoutines::_cont_thaw = nullptr; 189 address StubRoutines::_cont_returnBarrier = nullptr; 190 address StubRoutines::_cont_returnBarrierExc = nullptr; 191 192 JFR_ONLY(RuntimeStub* StubRoutines::_jfr_write_checkpoint_stub = nullptr;) 193 JFR_ONLY(address StubRoutines::_jfr_write_checkpoint = nullptr;) 194 JFR_ONLY(RuntimeStub* StubRoutines::_jfr_return_lease_stub = nullptr;) 195 JFR_ONLY(address StubRoutines::_jfr_return_lease = nullptr;) 196 197 address StubRoutines::_upcall_stub_exception_handler = nullptr; 198 199 address StubRoutines::_lookup_secondary_supers_table_slow_path_stub = nullptr; 200 address StubRoutines::_lookup_secondary_supers_table_stubs[Klass::SECONDARY_SUPERS_TABLE_SIZE] = { nullptr }; 201 202 203 // Initialization 204 // 205 // Note: to break cycle with universe initialization, stubs are generated in two phases. 206 // The first one generates stubs needed during universe init (e.g., _handle_must_compile_first_entry). 207 // The second phase includes all other stubs (which may depend on universe being initialized.) 208 209 extern void StubGenerator_generate(CodeBuffer* code, StubCodeGenerator::StubsKind kind); // only interface to generators 210 211 void UnsafeMemoryAccess::create_table(int max_size) { 212 UnsafeMemoryAccess::_table = new UnsafeMemoryAccess[max_size]; 213 UnsafeMemoryAccess::_table_max_length = max_size; 214 } 215 216 bool UnsafeMemoryAccess::contains_pc(address pc) { 217 for (int i = 0; i < UnsafeMemoryAccess::_table_length; i++) { 218 UnsafeMemoryAccess* entry = &UnsafeMemoryAccess::_table[i]; 219 if (pc >= entry->start_pc() && pc < entry->end_pc()) { 220 return true; 221 } 222 } 223 return false; 224 } 225 226 address UnsafeMemoryAccess::page_error_continue_pc(address pc) { 227 for (int i = 0; i < UnsafeMemoryAccess::_table_length; i++) { 228 UnsafeMemoryAccess* entry = &UnsafeMemoryAccess::_table[i]; 229 if (pc >= entry->start_pc() && pc < entry->end_pc()) { 230 return entry->error_exit_pc(); 231 } 232 } 233 return nullptr; 234 } 235 236 237 static BufferBlob* initialize_stubs(StubCodeGenerator::StubsKind kind, 238 int code_size, int max_aligned_stubs, 239 const char* timer_msg, 240 const char* buffer_name, 241 const char* assert_msg) { 242 ResourceMark rm; 243 TraceTime timer(timer_msg, TRACETIME_LOG(Info, startuptime)); 244 // Add extra space for large CodeEntryAlignment 245 int size = code_size + CodeEntryAlignment * max_aligned_stubs; 246 BufferBlob* stubs_code = BufferBlob::create(buffer_name, size); 247 if (stubs_code == nullptr) { 248 vm_exit_out_of_memory(code_size, OOM_MALLOC_ERROR, "CodeCache: no room for %s", buffer_name); 249 } 250 CodeBuffer buffer(stubs_code); 251 StubGenerator_generate(&buffer, kind); 252 // When new stubs added we need to make sure there is some space left 253 // to catch situation when we should increase size again. 254 assert(code_size == 0 || buffer.insts_remaining() > 200, "increase %s", assert_msg); 255 256 LogTarget(Info, stubs) lt; 257 if (lt.is_enabled()) { 258 LogStream ls(lt); 259 ls.print_cr("%s\t [" INTPTR_FORMAT ", " INTPTR_FORMAT "] used: %d, free: %d", 260 buffer_name, p2i(stubs_code->content_begin()), p2i(stubs_code->content_end()), 261 buffer.total_content_size(), buffer.insts_remaining()); 262 } 263 return stubs_code; 264 } 265 266 void StubRoutines::initialize_initial_stubs() { 267 if (_initial_stubs_code == nullptr) { 268 _initial_stubs_code = initialize_stubs(StubCodeGenerator::Initial_stubs, 269 _initial_stubs_code_size, 10, 270 "StubRoutines generation initial stubs", 271 "StubRoutines (initial stubs)", 272 "_initial_stubs_code_size"); 273 } 274 } 275 276 void StubRoutines::initialize_continuation_stubs() { 277 if (_continuation_stubs_code == nullptr) { 278 _continuation_stubs_code = initialize_stubs(StubCodeGenerator::Continuation_stubs, 279 _continuation_stubs_code_size, 10, 280 "StubRoutines generation continuation stubs", 281 "StubRoutines (continuation stubs)", 282 "_continuation_stubs_code_size"); 283 } 284 } 285 286 void StubRoutines::initialize_compiler_stubs() { 287 if (_compiler_stubs_code == nullptr) { 288 _compiler_stubs_code = initialize_stubs(StubCodeGenerator::Compiler_stubs, 289 _compiler_stubs_code_size, 100, 290 "StubRoutines generation compiler stubs", 291 "StubRoutines (compiler stubs)", 292 "_compiler_stubs_code_size"); 293 } 294 } 295 296 void StubRoutines::initialize_final_stubs() { 297 if (_final_stubs_code == nullptr) { 298 _final_stubs_code = initialize_stubs(StubCodeGenerator::Final_stubs, 299 _final_stubs_code_size, 10, 300 "StubRoutines generation final stubs", 301 "StubRoutines (final stubs)", 302 "_final_stubs_code_size"); 303 } 304 } 305 306 void initial_stubs_init() { StubRoutines::initialize_initial_stubs(); } 307 void continuation_stubs_init() { StubRoutines::initialize_continuation_stubs(); } 308 void final_stubs_init() { StubRoutines::initialize_final_stubs(); } 309 310 void compiler_stubs_init(bool in_compiler_thread) { 311 if (in_compiler_thread && DelayCompilerStubsGeneration) { 312 // Temporarily revert state of stubs generation because 313 // it is called after final_stubs_init() finished 314 // during compiler runtime initialization. 315 // It is fine because these stubs are only used by 316 // compiled code and compiler is not running yet. 317 StubCodeDesc::unfreeze(); 318 StubRoutines::initialize_compiler_stubs(); 319 StubCodeDesc::freeze(); 320 } else if (!in_compiler_thread && !DelayCompilerStubsGeneration) { 321 StubRoutines::initialize_compiler_stubs(); 322 } 323 } 324 325 // 326 // Default versions of arraycopy functions 327 // 328 329 JRT_LEAF(void, StubRoutines::jbyte_copy(jbyte* src, jbyte* dest, size_t count)) 330 #ifndef PRODUCT 331 SharedRuntime::_jbyte_array_copy_ctr++; // Slow-path byte array copy 332 #endif // !PRODUCT 333 Copy::conjoint_jbytes_atomic(src, dest, count); 334 JRT_END 335 336 JRT_LEAF(void, StubRoutines::jshort_copy(jshort* src, jshort* dest, size_t count)) 337 #ifndef PRODUCT 338 SharedRuntime::_jshort_array_copy_ctr++; // Slow-path short/char array copy 339 #endif // !PRODUCT 340 Copy::conjoint_jshorts_atomic(src, dest, count); 341 JRT_END 342 343 JRT_LEAF(void, StubRoutines::jint_copy(jint* src, jint* dest, size_t count)) 344 #ifndef PRODUCT 345 SharedRuntime::_jint_array_copy_ctr++; // Slow-path int/float array copy 346 #endif // !PRODUCT 347 Copy::conjoint_jints_atomic(src, dest, count); 348 JRT_END 349 350 JRT_LEAF(void, StubRoutines::jlong_copy(jlong* src, jlong* dest, size_t count)) 351 #ifndef PRODUCT 352 SharedRuntime::_jlong_array_copy_ctr++; // Slow-path long/double array copy 353 #endif // !PRODUCT 354 Copy::conjoint_jlongs_atomic(src, dest, count); 355 JRT_END 356 357 JRT_LEAF(void, StubRoutines::oop_copy(oop* src, oop* dest, size_t count)) 358 #ifndef PRODUCT 359 SharedRuntime::_oop_array_copy_ctr++; // Slow-path oop array copy 360 #endif // !PRODUCT 361 assert(count != 0, "count should be non-zero"); 362 ArrayAccess<>::oop_arraycopy_raw((HeapWord*)src, (HeapWord*)dest, count); 363 JRT_END 364 365 JRT_LEAF(void, StubRoutines::oop_copy_uninit(oop* src, oop* dest, size_t count)) 366 #ifndef PRODUCT 367 SharedRuntime::_oop_array_copy_ctr++; // Slow-path oop array copy 368 #endif // !PRODUCT 369 assert(count != 0, "count should be non-zero"); 370 ArrayAccess<IS_DEST_UNINITIALIZED>::oop_arraycopy_raw((HeapWord*)src, (HeapWord*)dest, count); 371 JRT_END 372 373 JRT_LEAF(void, StubRoutines::arrayof_jbyte_copy(HeapWord* src, HeapWord* dest, size_t count)) 374 #ifndef PRODUCT 375 SharedRuntime::_jbyte_array_copy_ctr++; // Slow-path byte array copy 376 #endif // !PRODUCT 377 Copy::arrayof_conjoint_jbytes(src, dest, count); 378 JRT_END 379 380 JRT_LEAF(void, StubRoutines::arrayof_jshort_copy(HeapWord* src, HeapWord* dest, size_t count)) 381 #ifndef PRODUCT 382 SharedRuntime::_jshort_array_copy_ctr++; // Slow-path short/char array copy 383 #endif // !PRODUCT 384 Copy::arrayof_conjoint_jshorts(src, dest, count); 385 JRT_END 386 387 JRT_LEAF(void, StubRoutines::arrayof_jint_copy(HeapWord* src, HeapWord* dest, size_t count)) 388 #ifndef PRODUCT 389 SharedRuntime::_jint_array_copy_ctr++; // Slow-path int/float array copy 390 #endif // !PRODUCT 391 Copy::arrayof_conjoint_jints(src, dest, count); 392 JRT_END 393 394 JRT_LEAF(void, StubRoutines::arrayof_jlong_copy(HeapWord* src, HeapWord* dest, size_t count)) 395 #ifndef PRODUCT 396 SharedRuntime::_jlong_array_copy_ctr++; // Slow-path int/float array copy 397 #endif // !PRODUCT 398 Copy::arrayof_conjoint_jlongs(src, dest, count); 399 JRT_END 400 401 JRT_LEAF(void, StubRoutines::arrayof_oop_copy(HeapWord* src, HeapWord* dest, size_t count)) 402 #ifndef PRODUCT 403 SharedRuntime::_oop_array_copy_ctr++; // Slow-path oop array copy 404 #endif // !PRODUCT 405 assert(count != 0, "count should be non-zero"); 406 ArrayAccess<ARRAYCOPY_ARRAYOF>::oop_arraycopy_raw(src, dest, count); 407 JRT_END 408 409 JRT_LEAF(void, StubRoutines::arrayof_oop_copy_uninit(HeapWord* src, HeapWord* dest, size_t count)) 410 #ifndef PRODUCT 411 SharedRuntime::_oop_array_copy_ctr++; // Slow-path oop array copy 412 #endif // !PRODUCT 413 assert(count != 0, "count should be non-zero"); 414 ArrayAccess<ARRAYCOPY_ARRAYOF | IS_DEST_UNINITIALIZED>::oop_arraycopy_raw(src, dest, count); 415 JRT_END 416 417 address StubRoutines::select_fill_function(BasicType t, bool aligned, const char* &name) { 418 #define RETURN_STUB(xxx_fill) { \ 419 name = #xxx_fill; \ 420 return StubRoutines::xxx_fill(); } 421 422 switch (t) { 423 case T_BYTE: 424 case T_BOOLEAN: 425 if (!aligned) RETURN_STUB(jbyte_fill); 426 RETURN_STUB(arrayof_jbyte_fill); 427 case T_CHAR: 428 case T_SHORT: 429 if (!aligned) RETURN_STUB(jshort_fill); 430 RETURN_STUB(arrayof_jshort_fill); 431 case T_INT: 432 case T_FLOAT: 433 if (!aligned) RETURN_STUB(jint_fill); 434 RETURN_STUB(arrayof_jint_fill); 435 case T_DOUBLE: 436 case T_LONG: 437 case T_ARRAY: 438 case T_OBJECT: 439 case T_NARROWOOP: 440 case T_NARROWKLASS: 441 case T_ADDRESS: 442 case T_VOID: 443 // Currently unsupported 444 return nullptr; 445 446 default: 447 ShouldNotReachHere(); 448 return nullptr; 449 } 450 451 #undef RETURN_STUB 452 } 453 454 // constants for computing the copy function 455 enum { 456 COPYFUNC_UNALIGNED = 0, 457 COPYFUNC_ALIGNED = 1, // src, dest aligned to HeapWordSize 458 COPYFUNC_CONJOINT = 0, 459 COPYFUNC_DISJOINT = 2 // src != dest, or transfer can descend 460 }; 461 462 // Note: The condition "disjoint" applies also for overlapping copies 463 // where an descending copy is permitted (i.e., dest_offset <= src_offset). 464 address 465 StubRoutines::select_arraycopy_function(BasicType t, bool aligned, bool disjoint, const char* &name, bool dest_uninitialized) { 466 int selector = 467 (aligned ? COPYFUNC_ALIGNED : COPYFUNC_UNALIGNED) + 468 (disjoint ? COPYFUNC_DISJOINT : COPYFUNC_CONJOINT); 469 470 #define RETURN_STUB(xxx_arraycopy) { \ 471 name = #xxx_arraycopy; \ 472 return StubRoutines::xxx_arraycopy(); } 473 474 #define RETURN_STUB_PARM(xxx_arraycopy, parm) { \ 475 name = parm ? #xxx_arraycopy "_uninit": #xxx_arraycopy; \ 476 return StubRoutines::xxx_arraycopy(parm); } 477 478 switch (t) { 479 case T_BYTE: 480 case T_BOOLEAN: 481 switch (selector) { 482 case COPYFUNC_CONJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jbyte_arraycopy); 483 case COPYFUNC_CONJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jbyte_arraycopy); 484 case COPYFUNC_DISJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jbyte_disjoint_arraycopy); 485 case COPYFUNC_DISJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jbyte_disjoint_arraycopy); 486 } 487 case T_CHAR: 488 case T_SHORT: 489 switch (selector) { 490 case COPYFUNC_CONJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jshort_arraycopy); 491 case COPYFUNC_CONJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jshort_arraycopy); 492 case COPYFUNC_DISJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jshort_disjoint_arraycopy); 493 case COPYFUNC_DISJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jshort_disjoint_arraycopy); 494 } 495 case T_INT: 496 case T_FLOAT: 497 switch (selector) { 498 case COPYFUNC_CONJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jint_arraycopy); 499 case COPYFUNC_CONJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jint_arraycopy); 500 case COPYFUNC_DISJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jint_disjoint_arraycopy); 501 case COPYFUNC_DISJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jint_disjoint_arraycopy); 502 } 503 case T_DOUBLE: 504 case T_LONG: 505 switch (selector) { 506 case COPYFUNC_CONJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jlong_arraycopy); 507 case COPYFUNC_CONJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jlong_arraycopy); 508 case COPYFUNC_DISJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jlong_disjoint_arraycopy); 509 case COPYFUNC_DISJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jlong_disjoint_arraycopy); 510 } 511 case T_ARRAY: 512 case T_OBJECT: 513 switch (selector) { 514 case COPYFUNC_CONJOINT | COPYFUNC_UNALIGNED: RETURN_STUB_PARM(oop_arraycopy, dest_uninitialized); 515 case COPYFUNC_CONJOINT | COPYFUNC_ALIGNED: RETURN_STUB_PARM(arrayof_oop_arraycopy, dest_uninitialized); 516 case COPYFUNC_DISJOINT | COPYFUNC_UNALIGNED: RETURN_STUB_PARM(oop_disjoint_arraycopy, dest_uninitialized); 517 case COPYFUNC_DISJOINT | COPYFUNC_ALIGNED: RETURN_STUB_PARM(arrayof_oop_disjoint_arraycopy, dest_uninitialized); 518 } 519 default: 520 ShouldNotReachHere(); 521 return nullptr; 522 } 523 524 #undef RETURN_STUB 525 #undef RETURN_STUB_PARM 526 } 527 528 UnsafeMemoryAccessMark::UnsafeMemoryAccessMark(StubCodeGenerator* cgen, bool add_entry, bool continue_at_scope_end, address error_exit_pc) { 529 _cgen = cgen; 530 _ucm_entry = nullptr; 531 if (add_entry) { 532 address err_exit_pc = nullptr; 533 if (!continue_at_scope_end) { 534 err_exit_pc = error_exit_pc != nullptr ? error_exit_pc : UnsafeMemoryAccess::common_exit_stub_pc(); 535 } 536 assert(err_exit_pc != nullptr || continue_at_scope_end, "error exit not set"); 537 _ucm_entry = UnsafeMemoryAccess::add_to_table(_cgen->assembler()->pc(), nullptr, err_exit_pc); 538 } 539 } 540 541 UnsafeMemoryAccessMark::~UnsafeMemoryAccessMark() { 542 if (_ucm_entry != nullptr) { 543 _ucm_entry->set_end_pc(_cgen->assembler()->pc()); 544 if (_ucm_entry->error_exit_pc() == nullptr) { 545 _ucm_entry->set_error_exit_pc(_cgen->assembler()->pc()); 546 } 547 } 548 }