1 /* 2 * Copyright (c) 1997, 2023, 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/oop.inline.hpp" 31 #include "prims/vectorSupport.hpp" 32 #include "runtime/continuation.hpp" 33 #include "runtime/interfaceSupport.inline.hpp" 34 #include "runtime/timerTrace.hpp" 35 #include "runtime/sharedRuntime.hpp" 36 #include "runtime/stubRoutines.hpp" 37 #include "utilities/align.hpp" 38 #include "utilities/copy.hpp" 39 #ifdef COMPILER2 40 #include "opto/runtime.hpp" 41 #endif 42 43 UnsafeCopyMemory* UnsafeCopyMemory::_table = nullptr; 44 int UnsafeCopyMemory::_table_length = 0; 45 int UnsafeCopyMemory::_table_max_length = 0; 46 address UnsafeCopyMemory::_common_exit_stub_pc = nullptr; 47 48 // Implementation of StubRoutines - for a description 49 // of how to extend it, see the header file. 50 51 // Class Variables 52 53 BufferBlob* StubRoutines::_initial_stubs_code = nullptr; 54 BufferBlob* StubRoutines::_final_stubs_code = nullptr; 55 BufferBlob* StubRoutines::_compiler_stubs_code = nullptr; 56 BufferBlob* StubRoutines::_continuation_stubs_code = nullptr; 57 58 address StubRoutines::_call_stub_return_address = nullptr; 59 address StubRoutines::_call_stub_entry = nullptr; 60 61 address StubRoutines::_catch_exception_entry = nullptr; 62 address StubRoutines::_forward_exception_entry = nullptr; 63 address StubRoutines::_throw_AbstractMethodError_entry = nullptr; 64 address StubRoutines::_throw_IncompatibleClassChangeError_entry = nullptr; 65 address StubRoutines::_throw_NullPointerException_at_call_entry = nullptr; 66 address StubRoutines::_throw_StackOverflowError_entry = nullptr; 67 address StubRoutines::_throw_delayed_StackOverflowError_entry = nullptr; 68 jint StubRoutines::_verify_oop_count = 0; 69 address StubRoutines::_verify_oop_subroutine_entry = nullptr; 70 address StubRoutines::_atomic_xchg_entry = nullptr; 71 address StubRoutines::_atomic_cmpxchg_entry = nullptr; 72 address StubRoutines::_atomic_cmpxchg_long_entry = nullptr; 73 address StubRoutines::_atomic_add_entry = nullptr; 74 address StubRoutines::_fence_entry = nullptr; 75 76 // Compiled code entry points default values 77 // The default functions don't have separate disjoint versions. 78 address StubRoutines::_jbyte_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::jbyte_copy); 79 address StubRoutines::_jshort_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::jshort_copy); 80 address StubRoutines::_jint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::jint_copy); 81 address StubRoutines::_jlong_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::jlong_copy); 82 address StubRoutines::_oop_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::oop_copy); 83 address StubRoutines::_oop_arraycopy_uninit = CAST_FROM_FN_PTR(address, StubRoutines::oop_copy_uninit); 84 address StubRoutines::_jbyte_disjoint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::jbyte_copy); 85 address StubRoutines::_jshort_disjoint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::jshort_copy); 86 address StubRoutines::_jint_disjoint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::jint_copy); 87 address StubRoutines::_jlong_disjoint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::jlong_copy); 88 address StubRoutines::_oop_disjoint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::oop_copy); 89 address StubRoutines::_oop_disjoint_arraycopy_uninit = CAST_FROM_FN_PTR(address, StubRoutines::oop_copy_uninit); 90 91 address StubRoutines::_arrayof_jbyte_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_jbyte_copy); 92 address StubRoutines::_arrayof_jshort_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_jshort_copy); 93 address StubRoutines::_arrayof_jint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_jint_copy); 94 address StubRoutines::_arrayof_jlong_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_jlong_copy); 95 address StubRoutines::_arrayof_oop_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_oop_copy); 96 address StubRoutines::_arrayof_oop_arraycopy_uninit = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_oop_copy_uninit); 97 address StubRoutines::_arrayof_jbyte_disjoint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_jbyte_copy); 98 address StubRoutines::_arrayof_jshort_disjoint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_jshort_copy); 99 address StubRoutines::_arrayof_jint_disjoint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_jint_copy); 100 address StubRoutines::_arrayof_jlong_disjoint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_jlong_copy); 101 address StubRoutines::_arrayof_oop_disjoint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_oop_copy); 102 address StubRoutines::_arrayof_oop_disjoint_arraycopy_uninit = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_oop_copy_uninit); 103 104 address StubRoutines::_data_cache_writeback = nullptr; 105 address StubRoutines::_data_cache_writeback_sync = nullptr; 106 107 address StubRoutines::_checkcast_arraycopy = nullptr; 108 address StubRoutines::_checkcast_arraycopy_uninit = nullptr; 109 address StubRoutines::_unsafe_arraycopy = nullptr; 110 address StubRoutines::_generic_arraycopy = nullptr; 111 112 address StubRoutines::_jbyte_fill; 113 address StubRoutines::_jshort_fill; 114 address StubRoutines::_jint_fill; 115 address StubRoutines::_arrayof_jbyte_fill; 116 address StubRoutines::_arrayof_jshort_fill; 117 address StubRoutines::_arrayof_jint_fill; 118 119 address StubRoutines::_aescrypt_encryptBlock = nullptr; 120 address StubRoutines::_aescrypt_decryptBlock = nullptr; 121 address StubRoutines::_cipherBlockChaining_encryptAESCrypt = nullptr; 122 address StubRoutines::_cipherBlockChaining_decryptAESCrypt = nullptr; 123 address StubRoutines::_electronicCodeBook_encryptAESCrypt = nullptr; 124 address StubRoutines::_electronicCodeBook_decryptAESCrypt = nullptr; 125 address StubRoutines::_counterMode_AESCrypt = nullptr; 126 address StubRoutines::_galoisCounterMode_AESCrypt = nullptr; 127 address StubRoutines::_ghash_processBlocks = nullptr; 128 address StubRoutines::_chacha20Block = nullptr; 129 address StubRoutines::_base64_encodeBlock = nullptr; 130 address StubRoutines::_base64_decodeBlock = nullptr; 131 address StubRoutines::_poly1305_processBlocks = 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::_crc32c_table_addr = nullptr; 148 address StubRoutines::_updateBytesCRC32C = nullptr; 149 address StubRoutines::_updateBytesAdler32 = nullptr; 150 151 address StubRoutines::_multiplyToLen = nullptr; 152 address StubRoutines::_squareToLen = nullptr; 153 address StubRoutines::_mulAdd = nullptr; 154 address StubRoutines::_montgomeryMultiply = nullptr; 155 address StubRoutines::_montgomerySquare = nullptr; 156 address StubRoutines::_bigIntegerRightShiftWorker = nullptr; 157 address StubRoutines::_bigIntegerLeftShiftWorker = nullptr; 158 159 address StubRoutines::_vectorizedMismatch = nullptr; 160 161 address StubRoutines::_dexp = nullptr; 162 address StubRoutines::_dlog = nullptr; 163 address StubRoutines::_dlog10 = nullptr; 164 address StubRoutines::_dpow = nullptr; 165 address StubRoutines::_dsin = nullptr; 166 address StubRoutines::_dcos = nullptr; 167 address StubRoutines::_dlibm_sin_cos_huge = nullptr; 168 address StubRoutines::_dlibm_reduce_pi04l = nullptr; 169 address StubRoutines::_dlibm_tan_cot_huge = nullptr; 170 address StubRoutines::_dtan = nullptr; 171 172 address StubRoutines::_load_inline_type_fields_in_regs = nullptr; 173 address StubRoutines::_store_inline_type_fields_to_buf = nullptr; 174 175 address StubRoutines::_f2hf = nullptr; 176 address StubRoutines::_hf2f = nullptr; 177 178 address StubRoutines::_vector_f_math[VectorSupport::NUM_VEC_SIZES][VectorSupport::NUM_SVML_OP] = {{nullptr}, {nullptr}}; 179 address StubRoutines::_vector_d_math[VectorSupport::NUM_VEC_SIZES][VectorSupport::NUM_SVML_OP] = {{nullptr}, {nullptr}}; 180 181 address StubRoutines::_cont_thaw = nullptr; 182 address StubRoutines::_cont_returnBarrier = nullptr; 183 address StubRoutines::_cont_returnBarrierExc = nullptr; 184 185 JFR_ONLY(RuntimeStub* StubRoutines::_jfr_write_checkpoint_stub = nullptr;) 186 JFR_ONLY(address StubRoutines::_jfr_write_checkpoint = nullptr;) 187 188 // Initialization 189 // 190 // Note: to break cycle with universe initialization, stubs are generated in two phases. 191 // The first one generates stubs needed during universe init (e.g., _handle_must_compile_first_entry). 192 // The second phase includes all other stubs (which may depend on universe being initialized.) 193 194 extern void StubGenerator_generate(CodeBuffer* code, StubCodeGenerator::StubsKind kind); // only interface to generators 195 196 void UnsafeCopyMemory::create_table(int max_size) { 197 UnsafeCopyMemory::_table = new UnsafeCopyMemory[max_size]; 198 UnsafeCopyMemory::_table_max_length = max_size; 199 } 200 201 bool UnsafeCopyMemory::contains_pc(address pc) { 202 for (int i = 0; i < UnsafeCopyMemory::_table_length; i++) { 203 UnsafeCopyMemory* entry = &UnsafeCopyMemory::_table[i]; 204 if (pc >= entry->start_pc() && pc < entry->end_pc()) { 205 return true; 206 } 207 } 208 return false; 209 } 210 211 address UnsafeCopyMemory::page_error_continue_pc(address pc) { 212 for (int i = 0; i < UnsafeCopyMemory::_table_length; i++) { 213 UnsafeCopyMemory* entry = &UnsafeCopyMemory::_table[i]; 214 if (pc >= entry->start_pc() && pc < entry->end_pc()) { 215 return entry->error_exit_pc(); 216 } 217 } 218 return nullptr; 219 } 220 221 222 static BufferBlob* initialize_stubs(StubCodeGenerator::StubsKind kind, 223 int code_size, int max_aligned_stubs, 224 const char* timer_msg, 225 const char* buffer_name, 226 const char* assert_msg) { 227 ResourceMark rm; 228 TraceTime timer(timer_msg, TRACETIME_LOG(Info, startuptime)); 229 // Add extra space for large CodeEntryAlignment 230 int size = code_size + CodeEntryAlignment * max_aligned_stubs; 231 BufferBlob* stubs_code = BufferBlob::create(buffer_name, size); 232 if (stubs_code == nullptr) { 233 vm_exit_out_of_memory(code_size, OOM_MALLOC_ERROR, "CodeCache: no room for %s", buffer_name); 234 } 235 CodeBuffer buffer(stubs_code); 236 StubGenerator_generate(&buffer, kind); 237 // When new stubs added we need to make sure there is some space left 238 // to catch situation when we should increase size again. 239 assert(code_size == 0 || buffer.insts_remaining() > 200, "increase %s", assert_msg); 240 241 LogTarget(Info, stubs) lt; 242 if (lt.is_enabled()) { 243 LogStream ls(lt); 244 ls.print_cr("%s\t [" INTPTR_FORMAT ", " INTPTR_FORMAT "] used: %d, free: %d", 245 buffer_name, p2i(stubs_code->content_begin()), p2i(stubs_code->content_end()), 246 buffer.total_content_size(), buffer.insts_remaining()); 247 } 248 return stubs_code; 249 } 250 251 void StubRoutines::initialize_initial_stubs() { 252 if (_initial_stubs_code == nullptr) { 253 _initial_stubs_code = initialize_stubs(StubCodeGenerator::Initial_stubs, 254 _initial_stubs_code_size, 10, 255 "StubRoutines generation initial stubs", 256 "StubRoutines (initial stubs)", 257 "_initial_stubs_code_size"); 258 } 259 } 260 261 void StubRoutines::initialize_continuation_stubs() { 262 if (_continuation_stubs_code == nullptr) { 263 _continuation_stubs_code = initialize_stubs(StubCodeGenerator::Continuation_stubs, 264 _continuation_stubs_code_size, 10, 265 "StubRoutines generation continuation stubs", 266 "StubRoutines (continuation stubs)", 267 "_continuation_stubs_code_size"); 268 } 269 } 270 271 void StubRoutines::initialize_compiler_stubs() { 272 if (_compiler_stubs_code == nullptr) { 273 _compiler_stubs_code = initialize_stubs(StubCodeGenerator::Compiler_stubs, 274 _compiler_stubs_code_size, 100, 275 "StubRoutines generation compiler stubs", 276 "StubRoutines (compiler stubs)", 277 "_compiler_stubs_code_size"); 278 } 279 } 280 281 #ifdef ASSERT 282 typedef void (*arraycopy_fn)(address src, address dst, int count); 283 284 // simple tests of generated arraycopy functions 285 static void test_arraycopy_func(address func, int alignment) { 286 int v = 0xcc; 287 int v2 = 0x11; 288 jlong lbuffer[8]; 289 jlong lbuffer2[8]; 290 address fbuffer = (address) lbuffer; 291 address fbuffer2 = (address) lbuffer2; 292 unsigned int i; 293 for (i = 0; i < sizeof(lbuffer); i++) { 294 fbuffer[i] = v; fbuffer2[i] = v2; 295 } 296 // C++ does not guarantee jlong[] array alignment to 8 bytes. 297 // Use middle of array to check that memory before it is not modified. 298 address buffer = align_up((address)&lbuffer[4], BytesPerLong); 299 address buffer2 = align_up((address)&lbuffer2[4], BytesPerLong); 300 // do an aligned copy 301 ((arraycopy_fn)func)(buffer, buffer2, 0); 302 for (i = 0; i < sizeof(lbuffer); i++) { 303 assert(fbuffer[i] == v && fbuffer2[i] == v2, "shouldn't have copied anything"); 304 } 305 // adjust destination alignment 306 ((arraycopy_fn)func)(buffer, buffer2 + alignment, 0); 307 for (i = 0; i < sizeof(lbuffer); i++) { 308 assert(fbuffer[i] == v && fbuffer2[i] == v2, "shouldn't have copied anything"); 309 } 310 // adjust source alignment 311 ((arraycopy_fn)func)(buffer + alignment, buffer2, 0); 312 for (i = 0; i < sizeof(lbuffer); i++) { 313 assert(fbuffer[i] == v && fbuffer2[i] == v2, "shouldn't have copied anything"); 314 } 315 } 316 #endif // ASSERT 317 318 void StubRoutines::initialize_final_stubs() { 319 if (_final_stubs_code == nullptr) { 320 _final_stubs_code = initialize_stubs(StubCodeGenerator::Final_stubs, 321 _final_stubs_code_size, 10, 322 "StubRoutines generation final stubs", 323 "StubRoutines (final stubs)", 324 "_final_stubs_code_size"); 325 } 326 327 #ifdef ASSERT 328 329 MACOS_AARCH64_ONLY(os::current_thread_enable_wx(WXExec)); 330 331 #define TEST_ARRAYCOPY(type) \ 332 test_arraycopy_func( type##_arraycopy(), sizeof(type)); \ 333 test_arraycopy_func( type##_disjoint_arraycopy(), sizeof(type)); \ 334 test_arraycopy_func(arrayof_##type##_arraycopy(), sizeof(HeapWord)); \ 335 test_arraycopy_func(arrayof_##type##_disjoint_arraycopy(), sizeof(HeapWord)) 336 337 // Make sure all the arraycopy stubs properly handle zero count 338 TEST_ARRAYCOPY(jbyte); 339 TEST_ARRAYCOPY(jshort); 340 TEST_ARRAYCOPY(jint); 341 TEST_ARRAYCOPY(jlong); 342 343 #undef TEST_ARRAYCOPY 344 345 #define TEST_FILL(type) \ 346 if (_##type##_fill != nullptr) { \ 347 union { \ 348 double d; \ 349 type body[96]; \ 350 } s; \ 351 \ 352 int v = 32; \ 353 for (int offset = -2; offset <= 2; offset++) { \ 354 for (int i = 0; i < 96; i++) { \ 355 s.body[i] = 1; \ 356 } \ 357 type* start = s.body + 8 + offset; \ 358 for (int aligned = 0; aligned < 2; aligned++) { \ 359 if (aligned) { \ 360 if (((intptr_t)start) % HeapWordSize == 0) { \ 361 ((void (*)(type*, int, int))StubRoutines::_arrayof_##type##_fill)(start, v, 80); \ 362 } else { \ 363 continue; \ 364 } \ 365 } else { \ 366 ((void (*)(type*, int, int))StubRoutines::_##type##_fill)(start, v, 80); \ 367 } \ 368 for (int i = 0; i < 96; i++) { \ 369 if (i < (8 + offset) || i >= (88 + offset)) { \ 370 assert(s.body[i] == 1, "what?"); \ 371 } else { \ 372 assert(s.body[i] == 32, "what?"); \ 373 } \ 374 } \ 375 } \ 376 } \ 377 } \ 378 379 TEST_FILL(jbyte); 380 TEST_FILL(jshort); 381 TEST_FILL(jint); 382 383 #undef TEST_FILL 384 385 #define TEST_COPYRTN(type) \ 386 test_arraycopy_func(CAST_FROM_FN_PTR(address, Copy::conjoint_##type##s_atomic), sizeof(type)); \ 387 test_arraycopy_func(CAST_FROM_FN_PTR(address, Copy::arrayof_conjoint_##type##s), (int)MAX2(sizeof(HeapWord), sizeof(type))) 388 389 // Make sure all the copy runtime routines properly handle zero count 390 TEST_COPYRTN(jbyte); 391 TEST_COPYRTN(jshort); 392 TEST_COPYRTN(jint); 393 TEST_COPYRTN(jlong); 394 395 #undef TEST_COPYRTN 396 397 test_arraycopy_func(CAST_FROM_FN_PTR(address, Copy::conjoint_words), sizeof(HeapWord)); 398 test_arraycopy_func(CAST_FROM_FN_PTR(address, Copy::disjoint_words), sizeof(HeapWord)); 399 test_arraycopy_func(CAST_FROM_FN_PTR(address, Copy::disjoint_words_atomic), sizeof(HeapWord)); 400 // Aligned to BytesPerLong 401 test_arraycopy_func(CAST_FROM_FN_PTR(address, Copy::aligned_conjoint_words), sizeof(jlong)); 402 test_arraycopy_func(CAST_FROM_FN_PTR(address, Copy::aligned_disjoint_words), sizeof(jlong)); 403 404 MACOS_AARCH64_ONLY(os::current_thread_enable_wx(WXWrite)); 405 406 #endif 407 } 408 409 410 void initial_stubs_init() { StubRoutines::initialize_initial_stubs(); } 411 void continuation_stubs_init() { StubRoutines::initialize_continuation_stubs(); } 412 void final_stubs_init() { StubRoutines::initialize_final_stubs(); } 413 414 void compiler_stubs_init(bool in_compiler_thread) { 415 if (in_compiler_thread && DelayCompilerStubsGeneration) { 416 // Temporarily revert state of stubs generation because 417 // it is called after final_stubs_init() finished 418 // during compiler runtime initialization. 419 // It is fine because these stubs are only used by 420 // compiled code and compiler is not running yet. 421 StubCodeDesc::unfreeze(); 422 StubRoutines::initialize_compiler_stubs(); 423 StubCodeDesc::freeze(); 424 } else if (!in_compiler_thread && !DelayCompilerStubsGeneration) { 425 StubRoutines::initialize_compiler_stubs(); 426 } 427 } 428 429 // 430 // Default versions of arraycopy functions 431 // 432 433 JRT_LEAF(void, StubRoutines::jbyte_copy(jbyte* src, jbyte* dest, size_t count)) 434 #ifndef PRODUCT 435 SharedRuntime::_jbyte_array_copy_ctr++; // Slow-path byte array copy 436 #endif // !PRODUCT 437 Copy::conjoint_jbytes_atomic(src, dest, count); 438 JRT_END 439 440 JRT_LEAF(void, StubRoutines::jshort_copy(jshort* src, jshort* dest, size_t count)) 441 #ifndef PRODUCT 442 SharedRuntime::_jshort_array_copy_ctr++; // Slow-path short/char array copy 443 #endif // !PRODUCT 444 Copy::conjoint_jshorts_atomic(src, dest, count); 445 JRT_END 446 447 JRT_LEAF(void, StubRoutines::jint_copy(jint* src, jint* dest, size_t count)) 448 #ifndef PRODUCT 449 SharedRuntime::_jint_array_copy_ctr++; // Slow-path int/float array copy 450 #endif // !PRODUCT 451 Copy::conjoint_jints_atomic(src, dest, count); 452 JRT_END 453 454 JRT_LEAF(void, StubRoutines::jlong_copy(jlong* src, jlong* dest, size_t count)) 455 #ifndef PRODUCT 456 SharedRuntime::_jlong_array_copy_ctr++; // Slow-path long/double array copy 457 #endif // !PRODUCT 458 Copy::conjoint_jlongs_atomic(src, dest, count); 459 JRT_END 460 461 JRT_LEAF(void, StubRoutines::oop_copy(oop* src, oop* dest, size_t count)) 462 #ifndef PRODUCT 463 SharedRuntime::_oop_array_copy_ctr++; // Slow-path oop array copy 464 #endif // !PRODUCT 465 assert(count != 0, "count should be non-zero"); 466 ArrayAccess<>::oop_arraycopy_raw((HeapWord*)src, (HeapWord*)dest, count); 467 JRT_END 468 469 JRT_LEAF(void, StubRoutines::oop_copy_uninit(oop* src, oop* dest, size_t count)) 470 #ifndef PRODUCT 471 SharedRuntime::_oop_array_copy_ctr++; // Slow-path oop array copy 472 #endif // !PRODUCT 473 assert(count != 0, "count should be non-zero"); 474 ArrayAccess<IS_DEST_UNINITIALIZED>::oop_arraycopy_raw((HeapWord*)src, (HeapWord*)dest, count); 475 JRT_END 476 477 JRT_LEAF(void, StubRoutines::arrayof_jbyte_copy(HeapWord* src, HeapWord* dest, size_t count)) 478 #ifndef PRODUCT 479 SharedRuntime::_jbyte_array_copy_ctr++; // Slow-path byte array copy 480 #endif // !PRODUCT 481 Copy::arrayof_conjoint_jbytes(src, dest, count); 482 JRT_END 483 484 JRT_LEAF(void, StubRoutines::arrayof_jshort_copy(HeapWord* src, HeapWord* dest, size_t count)) 485 #ifndef PRODUCT 486 SharedRuntime::_jshort_array_copy_ctr++; // Slow-path short/char array copy 487 #endif // !PRODUCT 488 Copy::arrayof_conjoint_jshorts(src, dest, count); 489 JRT_END 490 491 JRT_LEAF(void, StubRoutines::arrayof_jint_copy(HeapWord* src, HeapWord* dest, size_t count)) 492 #ifndef PRODUCT 493 SharedRuntime::_jint_array_copy_ctr++; // Slow-path int/float array copy 494 #endif // !PRODUCT 495 Copy::arrayof_conjoint_jints(src, dest, count); 496 JRT_END 497 498 JRT_LEAF(void, StubRoutines::arrayof_jlong_copy(HeapWord* src, HeapWord* dest, size_t count)) 499 #ifndef PRODUCT 500 SharedRuntime::_jlong_array_copy_ctr++; // Slow-path int/float array copy 501 #endif // !PRODUCT 502 Copy::arrayof_conjoint_jlongs(src, dest, count); 503 JRT_END 504 505 JRT_LEAF(void, StubRoutines::arrayof_oop_copy(HeapWord* src, HeapWord* dest, size_t count)) 506 #ifndef PRODUCT 507 SharedRuntime::_oop_array_copy_ctr++; // Slow-path oop array copy 508 #endif // !PRODUCT 509 assert(count != 0, "count should be non-zero"); 510 ArrayAccess<ARRAYCOPY_ARRAYOF>::oop_arraycopy_raw(src, dest, count); 511 JRT_END 512 513 JRT_LEAF(void, StubRoutines::arrayof_oop_copy_uninit(HeapWord* src, HeapWord* dest, size_t count)) 514 #ifndef PRODUCT 515 SharedRuntime::_oop_array_copy_ctr++; // Slow-path oop array copy 516 #endif // !PRODUCT 517 assert(count != 0, "count should be non-zero"); 518 ArrayAccess<ARRAYCOPY_ARRAYOF | IS_DEST_UNINITIALIZED>::oop_arraycopy_raw(src, dest, count); 519 JRT_END 520 521 address StubRoutines::select_fill_function(BasicType t, bool aligned, const char* &name) { 522 #define RETURN_STUB(xxx_fill) { \ 523 name = #xxx_fill; \ 524 return StubRoutines::xxx_fill(); } 525 526 switch (t) { 527 case T_BYTE: 528 case T_BOOLEAN: 529 if (!aligned) RETURN_STUB(jbyte_fill); 530 RETURN_STUB(arrayof_jbyte_fill); 531 case T_CHAR: 532 case T_SHORT: 533 if (!aligned) RETURN_STUB(jshort_fill); 534 RETURN_STUB(arrayof_jshort_fill); 535 case T_INT: 536 case T_FLOAT: 537 if (!aligned) RETURN_STUB(jint_fill); 538 RETURN_STUB(arrayof_jint_fill); 539 case T_DOUBLE: 540 case T_LONG: 541 case T_ARRAY: 542 case T_PRIMITIVE_OBJECT: 543 case T_OBJECT: 544 case T_NARROWOOP: 545 case T_NARROWKLASS: 546 case T_ADDRESS: 547 case T_VOID: 548 // Currently unsupported 549 return nullptr; 550 551 default: 552 ShouldNotReachHere(); 553 return nullptr; 554 } 555 556 #undef RETURN_STUB 557 } 558 559 // constants for computing the copy function 560 enum { 561 COPYFUNC_UNALIGNED = 0, 562 COPYFUNC_ALIGNED = 1, // src, dest aligned to HeapWordSize 563 COPYFUNC_CONJOINT = 0, 564 COPYFUNC_DISJOINT = 2 // src != dest, or transfer can descend 565 }; 566 567 // Note: The condition "disjoint" applies also for overlapping copies 568 // where an descending copy is permitted (i.e., dest_offset <= src_offset). 569 address 570 StubRoutines::select_arraycopy_function(BasicType t, bool aligned, bool disjoint, const char* &name, bool dest_uninitialized) { 571 int selector = 572 (aligned ? COPYFUNC_ALIGNED : COPYFUNC_UNALIGNED) + 573 (disjoint ? COPYFUNC_DISJOINT : COPYFUNC_CONJOINT); 574 575 #define RETURN_STUB(xxx_arraycopy) { \ 576 name = #xxx_arraycopy; \ 577 return StubRoutines::xxx_arraycopy(); } 578 579 #define RETURN_STUB_PARM(xxx_arraycopy, parm) { \ 580 name = parm ? #xxx_arraycopy "_uninit": #xxx_arraycopy; \ 581 return StubRoutines::xxx_arraycopy(parm); } 582 583 switch (t) { 584 case T_BYTE: 585 case T_BOOLEAN: 586 switch (selector) { 587 case COPYFUNC_CONJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jbyte_arraycopy); 588 case COPYFUNC_CONJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jbyte_arraycopy); 589 case COPYFUNC_DISJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jbyte_disjoint_arraycopy); 590 case COPYFUNC_DISJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jbyte_disjoint_arraycopy); 591 } 592 case T_CHAR: 593 case T_SHORT: 594 switch (selector) { 595 case COPYFUNC_CONJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jshort_arraycopy); 596 case COPYFUNC_CONJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jshort_arraycopy); 597 case COPYFUNC_DISJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jshort_disjoint_arraycopy); 598 case COPYFUNC_DISJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jshort_disjoint_arraycopy); 599 } 600 case T_INT: 601 case T_FLOAT: 602 switch (selector) { 603 case COPYFUNC_CONJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jint_arraycopy); 604 case COPYFUNC_CONJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jint_arraycopy); 605 case COPYFUNC_DISJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jint_disjoint_arraycopy); 606 case COPYFUNC_DISJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jint_disjoint_arraycopy); 607 } 608 case T_DOUBLE: 609 case T_LONG: 610 switch (selector) { 611 case COPYFUNC_CONJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jlong_arraycopy); 612 case COPYFUNC_CONJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jlong_arraycopy); 613 case COPYFUNC_DISJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jlong_disjoint_arraycopy); 614 case COPYFUNC_DISJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jlong_disjoint_arraycopy); 615 } 616 case T_ARRAY: 617 case T_OBJECT: 618 switch (selector) { 619 case COPYFUNC_CONJOINT | COPYFUNC_UNALIGNED: RETURN_STUB_PARM(oop_arraycopy, dest_uninitialized); 620 case COPYFUNC_CONJOINT | COPYFUNC_ALIGNED: RETURN_STUB_PARM(arrayof_oop_arraycopy, dest_uninitialized); 621 case COPYFUNC_DISJOINT | COPYFUNC_UNALIGNED: RETURN_STUB_PARM(oop_disjoint_arraycopy, dest_uninitialized); 622 case COPYFUNC_DISJOINT | COPYFUNC_ALIGNED: RETURN_STUB_PARM(arrayof_oop_disjoint_arraycopy, dest_uninitialized); 623 } 624 default: 625 ShouldNotReachHere(); 626 return nullptr; 627 } 628 629 #undef RETURN_STUB 630 #undef RETURN_STUB_PARM 631 } 632 633 UnsafeCopyMemoryMark::UnsafeCopyMemoryMark(StubCodeGenerator* cgen, bool add_entry, bool continue_at_scope_end, address error_exit_pc) { 634 _cgen = cgen; 635 _ucm_entry = nullptr; 636 if (add_entry) { 637 address err_exit_pc = nullptr; 638 if (!continue_at_scope_end) { 639 err_exit_pc = error_exit_pc != nullptr ? error_exit_pc : UnsafeCopyMemory::common_exit_stub_pc(); 640 } 641 assert(err_exit_pc != nullptr || continue_at_scope_end, "error exit not set"); 642 _ucm_entry = UnsafeCopyMemory::add_to_table(_cgen->assembler()->pc(), nullptr, err_exit_pc); 643 } 644 } 645 646 UnsafeCopyMemoryMark::~UnsafeCopyMemoryMark() { 647 if (_ucm_entry != nullptr) { 648 _ucm_entry->set_end_pc(_cgen->assembler()->pc()); 649 if (_ucm_entry->error_exit_pc() == nullptr) { 650 _ucm_entry->set_error_exit_pc(_cgen->assembler()->pc()); 651 } 652 } 653 }