1 /* 2 * Copyright (c) 1997, 2018, 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 "memory/resourceArea.hpp" 28 #include "oops/access.inline.hpp" 29 #include "oops/oop.inline.hpp" 30 #include "runtime/continuation.hpp" 31 #include "runtime/interfaceSupport.inline.hpp" 32 #include "runtime/timerTrace.hpp" 33 #include "runtime/sharedRuntime.hpp" 34 #include "runtime/stubRoutines.hpp" 35 #include "utilities/align.hpp" 36 #include "utilities/copy.hpp" 37 #include "utilities/vmError.hpp" 38 #ifdef COMPILER2 39 #include "opto/runtime.hpp" 40 #endif 41 42 43 // Implementation of StubRoutines - for a description 44 // of how to extend it, see the header file. 45 46 // Class Variables 47 48 BufferBlob* StubRoutines::_code1 = NULL; 49 BufferBlob* StubRoutines::_code2 = NULL; 50 BufferBlob* StubRoutines::_code3 = NULL; 51 52 address StubRoutines::_call_stub_return_address = NULL; 53 address StubRoutines::_call_stub_entry = NULL; 54 55 address StubRoutines::_catch_exception_entry = NULL; 56 address StubRoutines::_forward_exception_entry = NULL; 57 address StubRoutines::_throw_AbstractMethodError_entry = NULL; 58 address StubRoutines::_throw_IncompatibleClassChangeError_entry = NULL; 59 address StubRoutines::_throw_NullPointerException_at_call_entry = NULL; 60 address StubRoutines::_throw_StackOverflowError_entry = NULL; 61 address StubRoutines::_throw_delayed_StackOverflowError_entry = NULL; 62 jint StubRoutines::_verify_oop_count = 0; 63 address StubRoutines::_verify_oop_subroutine_entry = NULL; 64 address StubRoutines::_atomic_xchg_entry = NULL; 65 address StubRoutines::_atomic_xchg_long_entry = NULL; 66 address StubRoutines::_atomic_store_entry = NULL; 67 address StubRoutines::_atomic_cmpxchg_entry = NULL; 68 address StubRoutines::_atomic_cmpxchg_byte_entry = NULL; 69 address StubRoutines::_atomic_cmpxchg_long_entry = NULL; 70 address StubRoutines::_atomic_add_entry = NULL; 71 address StubRoutines::_atomic_add_long_entry = NULL; 72 address StubRoutines::_fence_entry = NULL; 73 address StubRoutines::_d2i_wrapper = NULL; 74 address StubRoutines::_d2l_wrapper = NULL; 75 76 jint StubRoutines::_fpu_cntrl_wrd_std = 0; 77 jint StubRoutines::_fpu_cntrl_wrd_24 = 0; 78 jint StubRoutines::_fpu_cntrl_wrd_64 = 0; 79 jint StubRoutines::_fpu_cntrl_wrd_trunc = 0; 80 jint StubRoutines::_mxcsr_std = 0; 81 jint StubRoutines::_fpu_subnormal_bias1[3] = { 0, 0, 0 }; 82 jint StubRoutines::_fpu_subnormal_bias2[3] = { 0, 0, 0 }; 83 84 // Compiled code entry points default values 85 // The default functions don't have separate disjoint versions. 86 address StubRoutines::_jbyte_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::jbyte_copy); 87 address StubRoutines::_jshort_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::jshort_copy); 88 address StubRoutines::_jint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::jint_copy); 89 address StubRoutines::_jlong_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::jlong_copy); 90 address StubRoutines::_oop_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::oop_copy); 91 address StubRoutines::_oop_arraycopy_uninit = CAST_FROM_FN_PTR(address, StubRoutines::oop_copy_uninit); 92 address StubRoutines::_jbyte_disjoint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::jbyte_copy); 93 address StubRoutines::_jshort_disjoint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::jshort_copy); 94 address StubRoutines::_jint_disjoint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::jint_copy); 95 address StubRoutines::_jlong_disjoint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::jlong_copy); 96 address StubRoutines::_oop_disjoint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::oop_copy); 97 address StubRoutines::_oop_disjoint_arraycopy_uninit = CAST_FROM_FN_PTR(address, StubRoutines::oop_copy_uninit); 98 99 address StubRoutines::_arrayof_jbyte_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_jbyte_copy); 100 address StubRoutines::_arrayof_jshort_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_jshort_copy); 101 address StubRoutines::_arrayof_jint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_jint_copy); 102 address StubRoutines::_arrayof_jlong_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_jlong_copy); 103 address StubRoutines::_arrayof_oop_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_oop_copy); 104 address StubRoutines::_arrayof_oop_arraycopy_uninit = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_oop_copy_uninit); 105 address StubRoutines::_arrayof_jbyte_disjoint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_jbyte_copy); 106 address StubRoutines::_arrayof_jshort_disjoint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_jshort_copy); 107 address StubRoutines::_arrayof_jint_disjoint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_jint_copy); 108 address StubRoutines::_arrayof_jlong_disjoint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_jlong_copy); 109 address StubRoutines::_arrayof_oop_disjoint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_oop_copy); 110 address StubRoutines::_arrayof_oop_disjoint_arraycopy_uninit = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_oop_copy_uninit); 111 112 address StubRoutines::_zero_aligned_words = CAST_FROM_FN_PTR(address, Copy::zero_to_words); 113 114 address StubRoutines::_checkcast_arraycopy = NULL; 115 address StubRoutines::_checkcast_arraycopy_uninit = NULL; 116 address StubRoutines::_unsafe_arraycopy = NULL; 117 address StubRoutines::_generic_arraycopy = NULL; 118 119 120 address StubRoutines::_jbyte_fill; 121 address StubRoutines::_jshort_fill; 122 address StubRoutines::_jint_fill; 123 address StubRoutines::_arrayof_jbyte_fill; 124 address StubRoutines::_arrayof_jshort_fill; 125 address StubRoutines::_arrayof_jint_fill; 126 127 address StubRoutines::_aescrypt_encryptBlock = NULL; 128 address StubRoutines::_aescrypt_decryptBlock = NULL; 129 address StubRoutines::_cipherBlockChaining_encryptAESCrypt = NULL; 130 address StubRoutines::_cipherBlockChaining_decryptAESCrypt = NULL; 131 address StubRoutines::_counterMode_AESCrypt = NULL; 132 address StubRoutines::_ghash_processBlocks = NULL; 133 134 address StubRoutines::_sha1_implCompress = NULL; 135 address StubRoutines::_sha1_implCompressMB = NULL; 136 address StubRoutines::_sha256_implCompress = NULL; 137 address StubRoutines::_sha256_implCompressMB = NULL; 138 address StubRoutines::_sha512_implCompress = NULL; 139 address StubRoutines::_sha512_implCompressMB = NULL; 140 141 address StubRoutines::_updateBytesCRC32 = NULL; 142 address StubRoutines::_crc_table_adr = NULL; 143 144 address StubRoutines::_crc32c_table_addr = NULL; 145 address StubRoutines::_updateBytesCRC32C = NULL; 146 address StubRoutines::_updateBytesAdler32 = NULL; 147 148 address StubRoutines::_multiplyToLen = NULL; 149 address StubRoutines::_squareToLen = NULL; 150 address StubRoutines::_mulAdd = NULL; 151 address StubRoutines::_montgomeryMultiply = NULL; 152 address StubRoutines::_montgomerySquare = NULL; 153 154 address StubRoutines::_vectorizedMismatch = NULL; 155 156 address StubRoutines::_dexp = NULL; 157 address StubRoutines::_dlog = NULL; 158 address StubRoutines::_dlog10 = NULL; 159 address StubRoutines::_dpow = NULL; 160 address StubRoutines::_dsin = NULL; 161 address StubRoutines::_dcos = NULL; 162 address StubRoutines::_dlibm_sin_cos_huge = NULL; 163 address StubRoutines::_dlibm_reduce_pi04l = NULL; 164 address StubRoutines::_dlibm_tan_cot_huge = NULL; 165 address StubRoutines::_dtan = NULL; 166 167 double (* StubRoutines::_intrinsic_log10 )(double) = NULL; 168 double (* StubRoutines::_intrinsic_sin )(double) = NULL; 169 double (* StubRoutines::_intrinsic_cos )(double) = NULL; 170 double (* StubRoutines::_intrinsic_tan )(double) = NULL; 171 172 address StubRoutines::_safefetch32_entry = NULL; 173 address StubRoutines::_safefetch32_fault_pc = NULL; 174 address StubRoutines::_safefetch32_continuation_pc = NULL; 175 address StubRoutines::_safefetchN_entry = NULL; 176 address StubRoutines::_safefetchN_fault_pc = NULL; 177 address StubRoutines::_safefetchN_continuation_pc = NULL; 178 179 address StubRoutines::_cont_doYield = NULL; 180 address StubRoutines::_cont_thaw = NULL; 181 address StubRoutines::_cont_returnBarrier = NULL; 182 address StubRoutines::_cont_getSP = NULL; 183 address StubRoutines::_cont_getPC = NULL; 184 185 // Initialization 186 // 187 // Note: to break cycle with universe initialization, stubs are generated in two phases. 188 // The first one generates stubs needed during universe init (e.g., _handle_must_compile_first_entry). 189 // The second phase includes all other stubs (which may depend on universe being initialized.) 190 191 extern void StubGenerator_generate(CodeBuffer* code, int phase); // only interface to generators 192 193 void StubRoutines::initialize1() { 194 if (_code1 == NULL) { 195 ResourceMark rm; 196 TraceTime timer("StubRoutines generation 1", TRACETIME_LOG(Info, startuptime)); 197 _code1 = BufferBlob::create("StubRoutines (1)", code_size1); 198 if (_code1 == NULL) { 199 vm_exit_out_of_memory(code_size1, OOM_MALLOC_ERROR, "CodeCache: no room for StubRoutines (1)"); 200 } 201 CodeBuffer buffer(_code1); 202 StubGenerator_generate(&buffer, 0); 203 // When new stubs added we need to make sure there is some space left 204 // to catch situation when we should increase size again. 205 assert(code_size1 == 0 || buffer.insts_remaining() > 200, "increase code_size1"); 206 } 207 } 208 209 #ifdef ASSERT 210 typedef void (*arraycopy_fn)(address src, address dst, int count); 211 212 // simple tests of generated arraycopy functions 213 static void test_arraycopy_func(address func, int alignment) { 214 int v = 0xcc; 215 int v2 = 0x11; 216 jlong lbuffer[8]; 217 jlong lbuffer2[8]; 218 address fbuffer = (address) lbuffer; 219 address fbuffer2 = (address) lbuffer2; 220 unsigned int i; 221 for (i = 0; i < sizeof(lbuffer); i++) { 222 fbuffer[i] = v; fbuffer2[i] = v2; 223 } 224 // C++ does not guarantee jlong[] array alignment to 8 bytes. 225 // Use middle of array to check that memory before it is not modified. 226 address buffer = align_up((address)&lbuffer[4], BytesPerLong); 227 address buffer2 = align_up((address)&lbuffer2[4], BytesPerLong); 228 // do an aligned copy 229 ((arraycopy_fn)func)(buffer, buffer2, 0); 230 for (i = 0; i < sizeof(lbuffer); i++) { 231 assert(fbuffer[i] == v && fbuffer2[i] == v2, "shouldn't have copied anything"); 232 } 233 // adjust destination alignment 234 ((arraycopy_fn)func)(buffer, buffer2 + alignment, 0); 235 for (i = 0; i < sizeof(lbuffer); i++) { 236 assert(fbuffer[i] == v && fbuffer2[i] == v2, "shouldn't have copied anything"); 237 } 238 // adjust source alignment 239 ((arraycopy_fn)func)(buffer + alignment, buffer2, 0); 240 for (i = 0; i < sizeof(lbuffer); i++) { 241 assert(fbuffer[i] == v && fbuffer2[i] == v2, "shouldn't have copied anything"); 242 } 243 } 244 245 // simple test for SafeFetch32 246 static void test_safefetch32() { 247 if (CanUseSafeFetch32()) { 248 int dummy = 17; 249 int* const p_invalid = (int*) VMError::get_segfault_address(); 250 int* const p_valid = &dummy; 251 int result_invalid = SafeFetch32(p_invalid, 0xABC); 252 assert(result_invalid == 0xABC, "SafeFetch32 error"); 253 int result_valid = SafeFetch32(p_valid, 0xABC); 254 assert(result_valid == 17, "SafeFetch32 error"); 255 } 256 } 257 258 // simple test for SafeFetchN 259 static void test_safefetchN() { 260 if (CanUseSafeFetchN()) { 261 #ifdef _LP64 262 const intptr_t v1 = UCONST64(0xABCD00000000ABCD); 263 const intptr_t v2 = UCONST64(0xDEFD00000000DEFD); 264 #else 265 const intptr_t v1 = 0xABCDABCD; 266 const intptr_t v2 = 0xDEFDDEFD; 267 #endif 268 intptr_t dummy = v1; 269 intptr_t* const p_invalid = (intptr_t*) VMError::get_segfault_address(); 270 intptr_t* const p_valid = &dummy; 271 intptr_t result_invalid = SafeFetchN(p_invalid, v2); 272 assert(result_invalid == v2, "SafeFetchN error"); 273 intptr_t result_valid = SafeFetchN(p_valid, v2); 274 assert(result_valid == v1, "SafeFetchN error"); 275 } 276 } 277 #endif 278 279 void StubRoutines::initializeContinuationStubs() { 280 if (_code3 == NULL) { 281 ResourceMark rm; 282 TraceTime timer("StubRoutines generation 3", TRACETIME_LOG(Info, startuptime)); 283 _code3 = BufferBlob::create("StubRoutines (3)", code_size2); 284 if (_code3 == NULL) { 285 vm_exit_out_of_memory(code_size2, OOM_MALLOC_ERROR, "CodeCache: no room for StubRoutines (3)"); 286 } 287 CodeBuffer buffer(_code3); 288 StubGenerator_generate(&buffer, 1); 289 // When new stubs added we need to make sure there is some space left 290 // to catch situation when we should increase size again. 291 assert(code_size2 == 0 || buffer.insts_remaining() > 200, "increase code_size3"); 292 } 293 } 294 295 void StubRoutines::initialize2() { 296 if (_code2 == NULL) { 297 ResourceMark rm; 298 TraceTime timer("StubRoutines generation 2", TRACETIME_LOG(Info, startuptime)); 299 _code2 = BufferBlob::create("StubRoutines (2)", code_size2); 300 if (_code2 == NULL) { 301 vm_exit_out_of_memory(code_size2, OOM_MALLOC_ERROR, "CodeCache: no room for StubRoutines (2)"); 302 } 303 CodeBuffer buffer(_code2); 304 StubGenerator_generate(&buffer, 2); 305 // When new stubs added we need to make sure there is some space left 306 // to catch situation when we should increase size again. 307 assert(code_size2 == 0 || buffer.insts_remaining() > 200, "increase code_size2"); 308 } 309 310 #ifdef ASSERT 311 312 #define TEST_ARRAYCOPY(type) \ 313 test_arraycopy_func( type##_arraycopy(), sizeof(type)); \ 314 test_arraycopy_func( type##_disjoint_arraycopy(), sizeof(type)); \ 315 test_arraycopy_func(arrayof_##type##_arraycopy(), sizeof(HeapWord)); \ 316 test_arraycopy_func(arrayof_##type##_disjoint_arraycopy(), sizeof(HeapWord)) 317 318 // Make sure all the arraycopy stubs properly handle zero count 319 TEST_ARRAYCOPY(jbyte); 320 TEST_ARRAYCOPY(jshort); 321 TEST_ARRAYCOPY(jint); 322 TEST_ARRAYCOPY(jlong); 323 324 #undef TEST_ARRAYCOPY 325 326 #define TEST_FILL(type) \ 327 if (_##type##_fill != NULL) { \ 328 union { \ 329 double d; \ 330 type body[96]; \ 331 } s; \ 332 \ 333 int v = 32; \ 334 for (int offset = -2; offset <= 2; offset++) { \ 335 for (int i = 0; i < 96; i++) { \ 336 s.body[i] = 1; \ 337 } \ 338 type* start = s.body + 8 + offset; \ 339 for (int aligned = 0; aligned < 2; aligned++) { \ 340 if (aligned) { \ 341 if (((intptr_t)start) % HeapWordSize == 0) { \ 342 ((void (*)(type*, int, int))StubRoutines::_arrayof_##type##_fill)(start, v, 80); \ 343 } else { \ 344 continue; \ 345 } \ 346 } else { \ 347 ((void (*)(type*, int, int))StubRoutines::_##type##_fill)(start, v, 80); \ 348 } \ 349 for (int i = 0; i < 96; i++) { \ 350 if (i < (8 + offset) || i >= (88 + offset)) { \ 351 assert(s.body[i] == 1, "what?"); \ 352 } else { \ 353 assert(s.body[i] == 32, "what?"); \ 354 } \ 355 } \ 356 } \ 357 } \ 358 } \ 359 360 TEST_FILL(jbyte); 361 TEST_FILL(jshort); 362 TEST_FILL(jint); 363 364 #undef TEST_FILL 365 366 #define TEST_COPYRTN(type) \ 367 test_arraycopy_func(CAST_FROM_FN_PTR(address, Copy::conjoint_##type##s_atomic), sizeof(type)); \ 368 test_arraycopy_func(CAST_FROM_FN_PTR(address, Copy::arrayof_conjoint_##type##s), (int)MAX2(sizeof(HeapWord), sizeof(type))) 369 370 // Make sure all the copy runtime routines properly handle zero count 371 TEST_COPYRTN(jbyte); 372 TEST_COPYRTN(jshort); 373 TEST_COPYRTN(jint); 374 TEST_COPYRTN(jlong); 375 376 #undef TEST_COPYRTN 377 378 test_arraycopy_func(CAST_FROM_FN_PTR(address, Copy::conjoint_words), sizeof(HeapWord)); 379 test_arraycopy_func(CAST_FROM_FN_PTR(address, Copy::disjoint_words), sizeof(HeapWord)); 380 test_arraycopy_func(CAST_FROM_FN_PTR(address, Copy::disjoint_words_atomic), sizeof(HeapWord)); 381 // Aligned to BytesPerLong 382 test_arraycopy_func(CAST_FROM_FN_PTR(address, Copy::aligned_conjoint_words), sizeof(jlong)); 383 test_arraycopy_func(CAST_FROM_FN_PTR(address, Copy::aligned_disjoint_words), sizeof(jlong)); 384 385 // test safefetch routines 386 // Not on Windows 32bit until 8074860 is fixed 387 #if ! (defined(_WIN32) && defined(_M_IX86)) 388 test_safefetch32(); 389 test_safefetchN(); 390 #endif 391 392 #endif 393 } 394 395 396 void stubRoutines_init1() { StubRoutines::initialize1(); } 397 void stubRoutines_init2() { StubRoutines::initialize2(); } 398 void stubRoutines_initContinuationStubs() { StubRoutines::initializeContinuationStubs(); } 399 400 // 401 // Default versions of arraycopy functions 402 // 403 404 JRT_LEAF(void, StubRoutines::jbyte_copy(jbyte* src, jbyte* dest, size_t count)) 405 #ifndef PRODUCT 406 SharedRuntime::_jbyte_array_copy_ctr++; // Slow-path byte array copy 407 #endif // !PRODUCT 408 Copy::conjoint_jbytes_atomic(src, dest, count); 409 JRT_END 410 411 JRT_LEAF(void, StubRoutines::jshort_copy(jshort* src, jshort* dest, size_t count)) 412 #ifndef PRODUCT 413 SharedRuntime::_jshort_array_copy_ctr++; // Slow-path short/char array copy 414 #endif // !PRODUCT 415 Copy::conjoint_jshorts_atomic(src, dest, count); 416 JRT_END 417 418 JRT_LEAF(void, StubRoutines::jint_copy(jint* src, jint* dest, size_t count)) 419 #ifndef PRODUCT 420 SharedRuntime::_jint_array_copy_ctr++; // Slow-path int/float array copy 421 #endif // !PRODUCT 422 Copy::conjoint_jints_atomic(src, dest, count); 423 JRT_END 424 425 JRT_LEAF(void, StubRoutines::jlong_copy(jlong* src, jlong* dest, size_t count)) 426 #ifndef PRODUCT 427 SharedRuntime::_jlong_array_copy_ctr++; // Slow-path long/double array copy 428 #endif // !PRODUCT 429 Copy::conjoint_jlongs_atomic(src, dest, count); 430 JRT_END 431 432 JRT_LEAF(void, StubRoutines::oop_copy(oop* src, oop* dest, size_t count)) 433 #ifndef PRODUCT 434 SharedRuntime::_oop_array_copy_ctr++; // Slow-path oop array copy 435 #endif // !PRODUCT 436 assert(count != 0, "count should be non-zero"); 437 HeapAccess<>::oop_arraycopy(NULL, NULL, (HeapWord*)src, (HeapWord*)dest, count); 438 JRT_END 439 440 JRT_LEAF(void, StubRoutines::oop_copy_uninit(oop* src, oop* dest, size_t count)) 441 #ifndef PRODUCT 442 SharedRuntime::_oop_array_copy_ctr++; // Slow-path oop array copy 443 #endif // !PRODUCT 444 assert(count != 0, "count should be non-zero"); 445 HeapAccess<AS_DEST_NOT_INITIALIZED>::oop_arraycopy(NULL, NULL, (HeapWord*)src, (HeapWord*)dest, count); 446 JRT_END 447 448 JRT_LEAF(void, StubRoutines::arrayof_jbyte_copy(HeapWord* src, HeapWord* dest, size_t count)) 449 #ifndef PRODUCT 450 SharedRuntime::_jbyte_array_copy_ctr++; // Slow-path byte array copy 451 #endif // !PRODUCT 452 Copy::arrayof_conjoint_jbytes(src, dest, count); 453 JRT_END 454 455 JRT_LEAF(void, StubRoutines::arrayof_jshort_copy(HeapWord* src, HeapWord* dest, size_t count)) 456 #ifndef PRODUCT 457 SharedRuntime::_jshort_array_copy_ctr++; // Slow-path short/char array copy 458 #endif // !PRODUCT 459 Copy::arrayof_conjoint_jshorts(src, dest, count); 460 JRT_END 461 462 JRT_LEAF(void, StubRoutines::arrayof_jint_copy(HeapWord* src, HeapWord* dest, size_t count)) 463 #ifndef PRODUCT 464 SharedRuntime::_jint_array_copy_ctr++; // Slow-path int/float array copy 465 #endif // !PRODUCT 466 Copy::arrayof_conjoint_jints(src, dest, count); 467 JRT_END 468 469 JRT_LEAF(void, StubRoutines::arrayof_jlong_copy(HeapWord* src, HeapWord* dest, size_t count)) 470 #ifndef PRODUCT 471 SharedRuntime::_jlong_array_copy_ctr++; // Slow-path int/float array copy 472 #endif // !PRODUCT 473 Copy::arrayof_conjoint_jlongs(src, dest, count); 474 JRT_END 475 476 JRT_LEAF(void, StubRoutines::arrayof_oop_copy(HeapWord* src, HeapWord* dest, size_t count)) 477 #ifndef PRODUCT 478 SharedRuntime::_oop_array_copy_ctr++; // Slow-path oop array copy 479 #endif // !PRODUCT 480 assert(count != 0, "count should be non-zero"); 481 HeapAccess<ARRAYCOPY_ARRAYOF>::oop_arraycopy(NULL, NULL, src, dest, count); 482 JRT_END 483 484 JRT_LEAF(void, StubRoutines::arrayof_oop_copy_uninit(HeapWord* src, HeapWord* dest, size_t count)) 485 #ifndef PRODUCT 486 SharedRuntime::_oop_array_copy_ctr++; // Slow-path oop array copy 487 #endif // !PRODUCT 488 assert(count != 0, "count should be non-zero"); 489 HeapAccess<ARRAYCOPY_ARRAYOF | AS_DEST_NOT_INITIALIZED>::oop_arraycopy(NULL, NULL, src, dest, count); 490 JRT_END 491 492 address StubRoutines::select_fill_function(BasicType t, bool aligned, const char* &name) { 493 #define RETURN_STUB(xxx_fill) { \ 494 name = #xxx_fill; \ 495 return StubRoutines::xxx_fill(); } 496 497 switch (t) { 498 case T_BYTE: 499 case T_BOOLEAN: 500 if (!aligned) RETURN_STUB(jbyte_fill); 501 RETURN_STUB(arrayof_jbyte_fill); 502 case T_CHAR: 503 case T_SHORT: 504 if (!aligned) RETURN_STUB(jshort_fill); 505 RETURN_STUB(arrayof_jshort_fill); 506 case T_INT: 507 case T_FLOAT: 508 if (!aligned) RETURN_STUB(jint_fill); 509 RETURN_STUB(arrayof_jint_fill); 510 case T_DOUBLE: 511 case T_LONG: 512 case T_ARRAY: 513 case T_OBJECT: 514 case T_NARROWOOP: 515 case T_NARROWKLASS: 516 case T_ADDRESS: 517 // Currently unsupported 518 return NULL; 519 520 default: 521 ShouldNotReachHere(); 522 return NULL; 523 } 524 525 #undef RETURN_STUB 526 } 527 528 // constants for computing the copy function 529 enum { 530 COPYFUNC_UNALIGNED = 0, 531 COPYFUNC_ALIGNED = 1, // src, dest aligned to HeapWordSize 532 COPYFUNC_CONJOINT = 0, 533 COPYFUNC_DISJOINT = 2 // src != dest, or transfer can descend 534 }; 535 536 // Note: The condition "disjoint" applies also for overlapping copies 537 // where an descending copy is permitted (i.e., dest_offset <= src_offset). 538 address 539 StubRoutines::select_arraycopy_function(BasicType t, bool aligned, bool disjoint, const char* &name, bool dest_uninitialized) { 540 int selector = 541 (aligned ? COPYFUNC_ALIGNED : COPYFUNC_UNALIGNED) + 542 (disjoint ? COPYFUNC_DISJOINT : COPYFUNC_CONJOINT); 543 544 #define RETURN_STUB(xxx_arraycopy) { \ 545 name = #xxx_arraycopy; \ 546 return StubRoutines::xxx_arraycopy(); } 547 548 #define RETURN_STUB_PARM(xxx_arraycopy, parm) { \ 549 name = #xxx_arraycopy; \ 550 return StubRoutines::xxx_arraycopy(parm); } 551 552 switch (t) { 553 case T_BYTE: 554 case T_BOOLEAN: 555 switch (selector) { 556 case COPYFUNC_CONJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jbyte_arraycopy); 557 case COPYFUNC_CONJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jbyte_arraycopy); 558 case COPYFUNC_DISJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jbyte_disjoint_arraycopy); 559 case COPYFUNC_DISJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jbyte_disjoint_arraycopy); 560 } 561 case T_CHAR: 562 case T_SHORT: 563 switch (selector) { 564 case COPYFUNC_CONJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jshort_arraycopy); 565 case COPYFUNC_CONJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jshort_arraycopy); 566 case COPYFUNC_DISJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jshort_disjoint_arraycopy); 567 case COPYFUNC_DISJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jshort_disjoint_arraycopy); 568 } 569 case T_INT: 570 case T_FLOAT: 571 switch (selector) { 572 case COPYFUNC_CONJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jint_arraycopy); 573 case COPYFUNC_CONJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jint_arraycopy); 574 case COPYFUNC_DISJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jint_disjoint_arraycopy); 575 case COPYFUNC_DISJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jint_disjoint_arraycopy); 576 } 577 case T_DOUBLE: 578 case T_LONG: 579 switch (selector) { 580 case COPYFUNC_CONJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jlong_arraycopy); 581 case COPYFUNC_CONJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jlong_arraycopy); 582 case COPYFUNC_DISJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jlong_disjoint_arraycopy); 583 case COPYFUNC_DISJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jlong_disjoint_arraycopy); 584 } 585 case T_ARRAY: 586 case T_OBJECT: 587 switch (selector) { 588 case COPYFUNC_CONJOINT | COPYFUNC_UNALIGNED: RETURN_STUB_PARM(oop_arraycopy, dest_uninitialized); 589 case COPYFUNC_CONJOINT | COPYFUNC_ALIGNED: RETURN_STUB_PARM(arrayof_oop_arraycopy, dest_uninitialized); 590 case COPYFUNC_DISJOINT | COPYFUNC_UNALIGNED: RETURN_STUB_PARM(oop_disjoint_arraycopy, dest_uninitialized); 591 case COPYFUNC_DISJOINT | COPYFUNC_ALIGNED: RETURN_STUB_PARM(arrayof_oop_disjoint_arraycopy, dest_uninitialized); 592 } 593 default: 594 ShouldNotReachHere(); 595 return NULL; 596 } 597 598 #undef RETURN_STUB 599 #undef RETURN_STUB_PARM 600 }