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::_string_indexof_array[4] = { nullptr }; 153 154 address StubRoutines::_crc32c_table_addr = nullptr; 155 address StubRoutines::_updateBytesCRC32C = nullptr; 156 address StubRoutines::_updateBytesAdler32 = nullptr; 157 158 address StubRoutines::_multiplyToLen = nullptr; 159 address StubRoutines::_squareToLen = nullptr; 160 address StubRoutines::_mulAdd = nullptr; 161 address StubRoutines::_montgomeryMultiply = nullptr; 162 address StubRoutines::_montgomerySquare = nullptr; 163 address StubRoutines::_bigIntegerRightShiftWorker = nullptr; 164 address StubRoutines::_bigIntegerLeftShiftWorker = nullptr; 165 166 address StubRoutines::_vectorizedMismatch = nullptr; 167 168 address StubRoutines::_dexp = nullptr; 169 address StubRoutines::_dlog = nullptr; 170 address StubRoutines::_dlog10 = nullptr; 171 address StubRoutines::_fmod = nullptr; 172 address StubRoutines::_dpow = nullptr; 173 address StubRoutines::_dsin = nullptr; 174 address StubRoutines::_dcos = nullptr; 175 address StubRoutines::_dlibm_sin_cos_huge = nullptr; 176 address StubRoutines::_dlibm_reduce_pi04l = nullptr; 177 address StubRoutines::_dlibm_tan_cot_huge = nullptr; 178 address StubRoutines::_dtan = nullptr; 179 180 address StubRoutines::_f2hf = nullptr; 181 address StubRoutines::_hf2f = nullptr; 182 183 address StubRoutines::_vector_f_math[VectorSupport::NUM_VEC_SIZES][VectorSupport::NUM_SVML_OP] = {{nullptr}, {nullptr}}; 184 address StubRoutines::_vector_d_math[VectorSupport::NUM_VEC_SIZES][VectorSupport::NUM_SVML_OP] = {{nullptr}, {nullptr}}; 185 186 address StubRoutines::_method_entry_barrier = nullptr; 187 address StubRoutines::_array_sort = nullptr; 188 address StubRoutines::_array_partition = nullptr; 189 190 address StubRoutines::_cont_thaw = nullptr; 191 address StubRoutines::_cont_returnBarrier = nullptr; 192 address StubRoutines::_cont_returnBarrierExc = nullptr; 193 address StubRoutines::_cont_preempt_stub = nullptr; 194 address StubRoutines::_cont_resume_monitor_operation = nullptr; 195 address StubRoutines::_cont_resume_compiler_adapter = nullptr; 196 197 JFR_ONLY(RuntimeStub* StubRoutines::_jfr_write_checkpoint_stub = nullptr;) 198 JFR_ONLY(address StubRoutines::_jfr_write_checkpoint = nullptr;) 199 JFR_ONLY(RuntimeStub* StubRoutines::_jfr_return_lease_stub = nullptr;) 200 JFR_ONLY(address StubRoutines::_jfr_return_lease = nullptr;) 201 202 address StubRoutines::_upcall_stub_exception_handler = nullptr; 203 204 address StubRoutines::_lookup_secondary_supers_table_slow_path_stub = nullptr; 205 address StubRoutines::_lookup_secondary_supers_table_stubs[Klass::SECONDARY_SUPERS_TABLE_SIZE] = { nullptr }; 206 207 208 // Initialization 209 // 210 // Note: to break cycle with universe initialization, stubs are generated in two phases. 211 // The first one generates stubs needed during universe init (e.g., _handle_must_compile_first_entry). 212 // The second phase includes all other stubs (which may depend on universe being initialized.) 213 214 extern void StubGenerator_generate(CodeBuffer* code, StubCodeGenerator::StubsKind kind); // only interface to generators 215 216 void UnsafeMemoryAccess::create_table(int max_size) { 217 UnsafeMemoryAccess::_table = new UnsafeMemoryAccess[max_size]; 218 UnsafeMemoryAccess::_table_max_length = max_size; 219 } 220 221 bool UnsafeMemoryAccess::contains_pc(address pc) { 222 for (int i = 0; i < UnsafeMemoryAccess::_table_length; i++) { 223 UnsafeMemoryAccess* entry = &UnsafeMemoryAccess::_table[i]; 224 if (pc >= entry->start_pc() && pc < entry->end_pc()) { 225 return true; 226 } 227 } 228 return false; 229 } 230 231 address UnsafeMemoryAccess::page_error_continue_pc(address pc) { 232 for (int i = 0; i < UnsafeMemoryAccess::_table_length; i++) { 233 UnsafeMemoryAccess* entry = &UnsafeMemoryAccess::_table[i]; 234 if (pc >= entry->start_pc() && pc < entry->end_pc()) { 235 return entry->error_exit_pc(); 236 } 237 } 238 return nullptr; 239 } 240 241 242 static BufferBlob* initialize_stubs(StubCodeGenerator::StubsKind kind, 243 int code_size, int max_aligned_stubs, 244 const char* timer_msg, 245 const char* buffer_name, 246 const char* assert_msg) { 247 ResourceMark rm; 248 TraceTime timer(timer_msg, TRACETIME_LOG(Info, startuptime)); 249 // Add extra space for large CodeEntryAlignment 250 int size = code_size + CodeEntryAlignment * max_aligned_stubs; 251 BufferBlob* stubs_code = BufferBlob::create(buffer_name, size); 252 if (stubs_code == nullptr) { 253 vm_exit_out_of_memory(code_size, OOM_MALLOC_ERROR, "CodeCache: no room for %s", buffer_name); 254 } 255 CodeBuffer buffer(stubs_code); 256 StubGenerator_generate(&buffer, kind); 257 // When new stubs added we need to make sure there is some space left 258 // to catch situation when we should increase size again. 259 assert(code_size == 0 || buffer.insts_remaining() > 200, "increase %s", assert_msg); 260 261 LogTarget(Info, stubs) lt; 262 if (lt.is_enabled()) { 263 LogStream ls(lt); 264 ls.print_cr("%s\t [" INTPTR_FORMAT ", " INTPTR_FORMAT "] used: %d, free: %d", 265 buffer_name, p2i(stubs_code->content_begin()), p2i(stubs_code->content_end()), 266 buffer.total_content_size(), buffer.insts_remaining()); 267 } 268 return stubs_code; 269 } 270 271 void StubRoutines::initialize_initial_stubs() { 272 if (_initial_stubs_code == nullptr) { 273 _initial_stubs_code = initialize_stubs(StubCodeGenerator::Initial_stubs, 274 _initial_stubs_code_size, 10, 275 "StubRoutines generation initial stubs", 276 "StubRoutines (initial stubs)", 277 "_initial_stubs_code_size"); 278 } 279 } 280 281 void StubRoutines::initialize_continuation_stubs() { 282 if (_continuation_stubs_code == nullptr) { 283 _continuation_stubs_code = initialize_stubs(StubCodeGenerator::Continuation_stubs, 284 _continuation_stubs_code_size, 10, 285 "StubRoutines generation continuation stubs", 286 "StubRoutines (continuation stubs)", 287 "_continuation_stubs_code_size"); 288 } 289 } 290 291 void StubRoutines::initialize_compiler_stubs() { 292 if (_compiler_stubs_code == nullptr) { 293 _compiler_stubs_code = initialize_stubs(StubCodeGenerator::Compiler_stubs, 294 _compiler_stubs_code_size, 100, 295 "StubRoutines generation compiler stubs", 296 "StubRoutines (compiler stubs)", 297 "_compiler_stubs_code_size"); 298 } 299 } 300 301 void StubRoutines::initialize_final_stubs() { 302 if (_final_stubs_code == nullptr) { 303 _final_stubs_code = initialize_stubs(StubCodeGenerator::Final_stubs, 304 _final_stubs_code_size, 10, 305 "StubRoutines generation final stubs", 306 "StubRoutines (final stubs)", 307 "_final_stubs_code_size"); 308 } 309 } 310 311 void initial_stubs_init() { StubRoutines::initialize_initial_stubs(); } 312 void continuation_stubs_init() { StubRoutines::initialize_continuation_stubs(); } 313 void final_stubs_init() { StubRoutines::initialize_final_stubs(); } 314 315 void compiler_stubs_init(bool in_compiler_thread) { 316 if (in_compiler_thread && DelayCompilerStubsGeneration) { 317 // Temporarily revert state of stubs generation because 318 // it is called after final_stubs_init() finished 319 // during compiler runtime initialization. 320 // It is fine because these stubs are only used by 321 // compiled code and compiler is not running yet. 322 StubCodeDesc::unfreeze(); 323 StubRoutines::initialize_compiler_stubs(); 324 StubCodeDesc::freeze(); 325 } else if (!in_compiler_thread && !DelayCompilerStubsGeneration) { 326 StubRoutines::initialize_compiler_stubs(); 327 } 328 } 329 330 // 331 // Default versions of arraycopy functions 332 // 333 334 JRT_LEAF(void, StubRoutines::jbyte_copy(jbyte* src, jbyte* dest, size_t count)) 335 #ifndef PRODUCT 336 SharedRuntime::_jbyte_array_copy_ctr++; // Slow-path byte array copy 337 #endif // !PRODUCT 338 Copy::conjoint_jbytes_atomic(src, dest, count); 339 JRT_END 340 341 JRT_LEAF(void, StubRoutines::jshort_copy(jshort* src, jshort* dest, size_t count)) 342 #ifndef PRODUCT 343 SharedRuntime::_jshort_array_copy_ctr++; // Slow-path short/char array copy 344 #endif // !PRODUCT 345 Copy::conjoint_jshorts_atomic(src, dest, count); 346 JRT_END 347 348 JRT_LEAF(void, StubRoutines::jint_copy(jint* src, jint* dest, size_t count)) 349 #ifndef PRODUCT 350 SharedRuntime::_jint_array_copy_ctr++; // Slow-path int/float array copy 351 #endif // !PRODUCT 352 Copy::conjoint_jints_atomic(src, dest, count); 353 JRT_END 354 355 JRT_LEAF(void, StubRoutines::jlong_copy(jlong* src, jlong* dest, size_t count)) 356 #ifndef PRODUCT 357 SharedRuntime::_jlong_array_copy_ctr++; // Slow-path long/double array copy 358 #endif // !PRODUCT 359 Copy::conjoint_jlongs_atomic(src, dest, count); 360 JRT_END 361 362 JRT_LEAF(void, StubRoutines::oop_copy(oop* src, oop* dest, size_t count)) 363 #ifndef PRODUCT 364 SharedRuntime::_oop_array_copy_ctr++; // Slow-path oop array copy 365 #endif // !PRODUCT 366 assert(count != 0, "count should be non-zero"); 367 ArrayAccess<>::oop_arraycopy_raw((HeapWord*)src, (HeapWord*)dest, count); 368 JRT_END 369 370 JRT_LEAF(void, StubRoutines::oop_copy_uninit(oop* src, oop* dest, size_t count)) 371 #ifndef PRODUCT 372 SharedRuntime::_oop_array_copy_ctr++; // Slow-path oop array copy 373 #endif // !PRODUCT 374 assert(count != 0, "count should be non-zero"); 375 ArrayAccess<IS_DEST_UNINITIALIZED>::oop_arraycopy_raw((HeapWord*)src, (HeapWord*)dest, count); 376 JRT_END 377 378 JRT_LEAF(void, StubRoutines::arrayof_jbyte_copy(HeapWord* src, HeapWord* dest, size_t count)) 379 #ifndef PRODUCT 380 SharedRuntime::_jbyte_array_copy_ctr++; // Slow-path byte array copy 381 #endif // !PRODUCT 382 Copy::arrayof_conjoint_jbytes(src, dest, count); 383 JRT_END 384 385 JRT_LEAF(void, StubRoutines::arrayof_jshort_copy(HeapWord* src, HeapWord* dest, size_t count)) 386 #ifndef PRODUCT 387 SharedRuntime::_jshort_array_copy_ctr++; // Slow-path short/char array copy 388 #endif // !PRODUCT 389 Copy::arrayof_conjoint_jshorts(src, dest, count); 390 JRT_END 391 392 JRT_LEAF(void, StubRoutines::arrayof_jint_copy(HeapWord* src, HeapWord* dest, size_t count)) 393 #ifndef PRODUCT 394 SharedRuntime::_jint_array_copy_ctr++; // Slow-path int/float array copy 395 #endif // !PRODUCT 396 Copy::arrayof_conjoint_jints(src, dest, count); 397 JRT_END 398 399 JRT_LEAF(void, StubRoutines::arrayof_jlong_copy(HeapWord* src, HeapWord* dest, size_t count)) 400 #ifndef PRODUCT 401 SharedRuntime::_jlong_array_copy_ctr++; // Slow-path int/float array copy 402 #endif // !PRODUCT 403 Copy::arrayof_conjoint_jlongs(src, dest, count); 404 JRT_END 405 406 JRT_LEAF(void, StubRoutines::arrayof_oop_copy(HeapWord* src, HeapWord* dest, size_t count)) 407 #ifndef PRODUCT 408 SharedRuntime::_oop_array_copy_ctr++; // Slow-path oop array copy 409 #endif // !PRODUCT 410 assert(count != 0, "count should be non-zero"); 411 ArrayAccess<ARRAYCOPY_ARRAYOF>::oop_arraycopy_raw(src, dest, count); 412 JRT_END 413 414 JRT_LEAF(void, StubRoutines::arrayof_oop_copy_uninit(HeapWord* src, HeapWord* dest, size_t count)) 415 #ifndef PRODUCT 416 SharedRuntime::_oop_array_copy_ctr++; // Slow-path oop array copy 417 #endif // !PRODUCT 418 assert(count != 0, "count should be non-zero"); 419 ArrayAccess<ARRAYCOPY_ARRAYOF | IS_DEST_UNINITIALIZED>::oop_arraycopy_raw(src, dest, count); 420 JRT_END 421 422 address StubRoutines::select_fill_function(BasicType t, bool aligned, const char* &name) { 423 #define RETURN_STUB(xxx_fill) { \ 424 name = #xxx_fill; \ 425 return StubRoutines::xxx_fill(); } 426 427 switch (t) { 428 case T_BYTE: 429 case T_BOOLEAN: 430 if (!aligned) RETURN_STUB(jbyte_fill); 431 RETURN_STUB(arrayof_jbyte_fill); 432 case T_CHAR: 433 case T_SHORT: 434 if (!aligned) RETURN_STUB(jshort_fill); 435 RETURN_STUB(arrayof_jshort_fill); 436 case T_INT: 437 case T_FLOAT: 438 if (!aligned) RETURN_STUB(jint_fill); 439 RETURN_STUB(arrayof_jint_fill); 440 case T_DOUBLE: 441 case T_LONG: 442 case T_ARRAY: 443 case T_OBJECT: 444 case T_NARROWOOP: 445 case T_NARROWKLASS: 446 case T_ADDRESS: 447 case T_VOID: 448 // Currently unsupported 449 return nullptr; 450 451 default: 452 ShouldNotReachHere(); 453 return nullptr; 454 } 455 456 #undef RETURN_STUB 457 } 458 459 // constants for computing the copy function 460 enum { 461 COPYFUNC_UNALIGNED = 0, 462 COPYFUNC_ALIGNED = 1, // src, dest aligned to HeapWordSize 463 COPYFUNC_CONJOINT = 0, 464 COPYFUNC_DISJOINT = 2 // src != dest, or transfer can descend 465 }; 466 467 // Note: The condition "disjoint" applies also for overlapping copies 468 // where an descending copy is permitted (i.e., dest_offset <= src_offset). 469 address 470 StubRoutines::select_arraycopy_function(BasicType t, bool aligned, bool disjoint, const char* &name, bool dest_uninitialized) { 471 int selector = 472 (aligned ? COPYFUNC_ALIGNED : COPYFUNC_UNALIGNED) + 473 (disjoint ? COPYFUNC_DISJOINT : COPYFUNC_CONJOINT); 474 475 #define RETURN_STUB(xxx_arraycopy) { \ 476 name = #xxx_arraycopy; \ 477 return StubRoutines::xxx_arraycopy(); } 478 479 #define RETURN_STUB_PARM(xxx_arraycopy, parm) { \ 480 name = parm ? #xxx_arraycopy "_uninit": #xxx_arraycopy; \ 481 return StubRoutines::xxx_arraycopy(parm); } 482 483 switch (t) { 484 case T_BYTE: 485 case T_BOOLEAN: 486 switch (selector) { 487 case COPYFUNC_CONJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jbyte_arraycopy); 488 case COPYFUNC_CONJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jbyte_arraycopy); 489 case COPYFUNC_DISJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jbyte_disjoint_arraycopy); 490 case COPYFUNC_DISJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jbyte_disjoint_arraycopy); 491 } 492 case T_CHAR: 493 case T_SHORT: 494 switch (selector) { 495 case COPYFUNC_CONJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jshort_arraycopy); 496 case COPYFUNC_CONJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jshort_arraycopy); 497 case COPYFUNC_DISJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jshort_disjoint_arraycopy); 498 case COPYFUNC_DISJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jshort_disjoint_arraycopy); 499 } 500 case T_INT: 501 case T_FLOAT: 502 switch (selector) { 503 case COPYFUNC_CONJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jint_arraycopy); 504 case COPYFUNC_CONJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jint_arraycopy); 505 case COPYFUNC_DISJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jint_disjoint_arraycopy); 506 case COPYFUNC_DISJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jint_disjoint_arraycopy); 507 } 508 case T_DOUBLE: 509 case T_LONG: 510 switch (selector) { 511 case COPYFUNC_CONJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jlong_arraycopy); 512 case COPYFUNC_CONJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jlong_arraycopy); 513 case COPYFUNC_DISJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jlong_disjoint_arraycopy); 514 case COPYFUNC_DISJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jlong_disjoint_arraycopy); 515 } 516 case T_ARRAY: 517 case T_OBJECT: 518 switch (selector) { 519 case COPYFUNC_CONJOINT | COPYFUNC_UNALIGNED: RETURN_STUB_PARM(oop_arraycopy, dest_uninitialized); 520 case COPYFUNC_CONJOINT | COPYFUNC_ALIGNED: RETURN_STUB_PARM(arrayof_oop_arraycopy, dest_uninitialized); 521 case COPYFUNC_DISJOINT | COPYFUNC_UNALIGNED: RETURN_STUB_PARM(oop_disjoint_arraycopy, dest_uninitialized); 522 case COPYFUNC_DISJOINT | COPYFUNC_ALIGNED: RETURN_STUB_PARM(arrayof_oop_disjoint_arraycopy, dest_uninitialized); 523 } 524 default: 525 ShouldNotReachHere(); 526 return nullptr; 527 } 528 529 #undef RETURN_STUB 530 #undef RETURN_STUB_PARM 531 } 532 533 UnsafeMemoryAccessMark::UnsafeMemoryAccessMark(StubCodeGenerator* cgen, bool add_entry, bool continue_at_scope_end, address error_exit_pc) { 534 _cgen = cgen; 535 _ucm_entry = nullptr; 536 if (add_entry) { 537 address err_exit_pc = nullptr; 538 if (!continue_at_scope_end) { 539 err_exit_pc = error_exit_pc != nullptr ? error_exit_pc : UnsafeMemoryAccess::common_exit_stub_pc(); 540 } 541 assert(err_exit_pc != nullptr || continue_at_scope_end, "error exit not set"); 542 _ucm_entry = UnsafeMemoryAccess::add_to_table(_cgen->assembler()->pc(), nullptr, err_exit_pc); 543 } 544 } 545 546 UnsafeMemoryAccessMark::~UnsafeMemoryAccessMark() { 547 if (_ucm_entry != nullptr) { 548 _ucm_entry->set_end_pc(_cgen->assembler()->pc()); 549 if (_ucm_entry->error_exit_pc() == nullptr) { 550 _ucm_entry->set_error_exit_pc(_cgen->assembler()->pc()); 551 } 552 } 553 }