1 /* 2 * Copyright (c) 1997, 2016, 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/oop.inline.hpp" 29 #include "runtime/interfaceSupport.hpp" 30 #include "runtime/timerTrace.hpp" 31 #include "runtime/sharedRuntime.hpp" 32 #include "runtime/stubRoutines.hpp" 33 #include "utilities/copy.hpp" 34 #ifdef COMPILER2 35 #include "opto/runtime.hpp" 36 #endif 37 38 39 // Implementation of StubRoutines - for a description 40 // of how to extend it, see the header file. 41 42 // Class Variables 43 44 BufferBlob* StubRoutines::_code1 = NULL; 45 BufferBlob* StubRoutines::_code2 = NULL; 46 47 address StubRoutines::_call_stub_return_address = NULL; 48 address StubRoutines::_call_stub_entry = NULL; 49 50 address StubRoutines::_catch_exception_entry = NULL; 51 address StubRoutines::_forward_exception_entry = NULL; 52 address StubRoutines::_throw_AbstractMethodError_entry = NULL; 53 address StubRoutines::_throw_IncompatibleClassChangeError_entry = NULL; 54 address StubRoutines::_throw_NullPointerException_at_call_entry = NULL; 55 address StubRoutines::_throw_StackOverflowError_entry = NULL; 56 address StubRoutines::_throw_delayed_StackOverflowError_entry = NULL; 57 jint StubRoutines::_verify_oop_count = 0; 58 address StubRoutines::_verify_oop_subroutine_entry = NULL; 59 address StubRoutines::_atomic_xchg_entry = NULL; 60 address StubRoutines::_atomic_xchg_ptr_entry = NULL; 61 address StubRoutines::_atomic_store_entry = NULL; 62 address StubRoutines::_atomic_store_ptr_entry = NULL; 63 address StubRoutines::_atomic_cmpxchg_entry = NULL; 64 address StubRoutines::_atomic_cmpxchg_ptr_entry = NULL; 65 address StubRoutines::_atomic_cmpxchg_byte_entry = NULL; 66 address StubRoutines::_atomic_cmpxchg_long_entry = NULL; 67 address StubRoutines::_atomic_add_entry = NULL; 68 address StubRoutines::_atomic_add_ptr_entry = NULL; 69 address StubRoutines::_fence_entry = NULL; 70 address StubRoutines::_d2i_wrapper = NULL; 71 address StubRoutines::_d2l_wrapper = NULL; 72 73 jint StubRoutines::_fpu_cntrl_wrd_std = 0; 74 jint StubRoutines::_fpu_cntrl_wrd_24 = 0; 75 jint StubRoutines::_fpu_cntrl_wrd_64 = 0; 76 jint StubRoutines::_fpu_cntrl_wrd_trunc = 0; 77 jint StubRoutines::_mxcsr_std = 0; 78 jint StubRoutines::_fpu_subnormal_bias1[3] = { 0, 0, 0 }; 79 jint StubRoutines::_fpu_subnormal_bias2[3] = { 0, 0, 0 }; 80 81 // Compiled code entry points default values 82 // The default functions don't have separate disjoint versions. 83 address StubRoutines::_jbyte_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::jbyte_copy); 84 address StubRoutines::_jshort_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::jshort_copy); 85 address StubRoutines::_jint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::jint_copy); 86 address StubRoutines::_jlong_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::jlong_copy); 87 address StubRoutines::_oop_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::oop_copy); 88 address StubRoutines::_oop_arraycopy_uninit = CAST_FROM_FN_PTR(address, StubRoutines::oop_copy_uninit); 89 address StubRoutines::_jbyte_disjoint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::jbyte_copy); 90 address StubRoutines::_jshort_disjoint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::jshort_copy); 91 address StubRoutines::_jint_disjoint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::jint_copy); 92 address StubRoutines::_jlong_disjoint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::jlong_copy); 93 address StubRoutines::_oop_disjoint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::oop_copy); 94 address StubRoutines::_oop_disjoint_arraycopy_uninit = CAST_FROM_FN_PTR(address, StubRoutines::oop_copy_uninit); 95 96 address StubRoutines::_arrayof_jbyte_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_jbyte_copy); 97 address StubRoutines::_arrayof_jshort_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_jshort_copy); 98 address StubRoutines::_arrayof_jint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_jint_copy); 99 address StubRoutines::_arrayof_jlong_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_jlong_copy); 100 address StubRoutines::_arrayof_oop_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_oop_copy); 101 address StubRoutines::_arrayof_oop_arraycopy_uninit = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_oop_copy_uninit); 102 address StubRoutines::_arrayof_jbyte_disjoint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_jbyte_copy); 103 address StubRoutines::_arrayof_jshort_disjoint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_jshort_copy); 104 address StubRoutines::_arrayof_jint_disjoint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_jint_copy); 105 address StubRoutines::_arrayof_jlong_disjoint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_jlong_copy); 106 address StubRoutines::_arrayof_oop_disjoint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_oop_copy); 107 address StubRoutines::_arrayof_oop_disjoint_arraycopy_uninit = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_oop_copy_uninit); 108 109 address StubRoutines::_zero_aligned_words = CAST_FROM_FN_PTR(address, Copy::zero_to_words); 110 111 address StubRoutines::_checkcast_arraycopy = NULL; 112 address StubRoutines::_checkcast_arraycopy_uninit = NULL; 113 address StubRoutines::_unsafe_arraycopy = NULL; 114 address StubRoutines::_generic_arraycopy = NULL; 115 116 117 address StubRoutines::_jbyte_fill; 118 address StubRoutines::_jshort_fill; 119 address StubRoutines::_jint_fill; 120 address StubRoutines::_arrayof_jbyte_fill; 121 address StubRoutines::_arrayof_jshort_fill; 122 address StubRoutines::_arrayof_jint_fill; 123 124 address StubRoutines::_aescrypt_encryptBlock = NULL; 125 address StubRoutines::_aescrypt_decryptBlock = NULL; 126 address StubRoutines::_cipherBlockChaining_encryptAESCrypt = NULL; 127 address StubRoutines::_cipherBlockChaining_decryptAESCrypt = NULL; 128 address StubRoutines::_counterMode_AESCrypt = NULL; 129 address StubRoutines::_ghash_processBlocks = NULL; 130 131 address StubRoutines::_sha1_implCompress = NULL; 132 address StubRoutines::_sha1_implCompressMB = NULL; 133 address StubRoutines::_sha256_implCompress = NULL; 134 address StubRoutines::_sha256_implCompressMB = NULL; 135 address StubRoutines::_sha512_implCompress = NULL; 136 address StubRoutines::_sha512_implCompressMB = NULL; 137 138 address StubRoutines::_updateBytesCRC32 = NULL; 139 address StubRoutines::_crc_table_adr = NULL; 140 141 address StubRoutines::_crc32c_table_addr = NULL; 142 address StubRoutines::_updateBytesCRC32C = NULL; 143 address StubRoutines::_updateBytesAdler32 = NULL; 144 145 address StubRoutines::_multiplyToLen = NULL; 146 address StubRoutines::_squareToLen = NULL; 147 address StubRoutines::_mulAdd = NULL; 148 address StubRoutines::_montgomeryMultiply = NULL; 149 address StubRoutines::_montgomerySquare = NULL; 150 151 address StubRoutines::_vectorizedMismatch = NULL; 152 153 address StubRoutines::_dexp = NULL; 154 address StubRoutines::_dlog = NULL; 155 address StubRoutines::_dlog10 = NULL; 156 address StubRoutines::_dpow = NULL; 157 address StubRoutines::_dsin = NULL; 158 address StubRoutines::_dcos = NULL; 159 address StubRoutines::_dlibm_sin_cos_huge = NULL; 160 address StubRoutines::_dlibm_reduce_pi04l = NULL; 161 address StubRoutines::_dlibm_tan_cot_huge = NULL; 162 address StubRoutines::_dtan = NULL; 163 164 double (* StubRoutines::_intrinsic_log10 )(double) = NULL; 165 double (* StubRoutines::_intrinsic_sin )(double) = NULL; 166 double (* StubRoutines::_intrinsic_cos )(double) = NULL; 167 double (* StubRoutines::_intrinsic_tan )(double) = NULL; 168 169 address StubRoutines::_safefetch32_entry = NULL; 170 address StubRoutines::_safefetch32_fault_pc = NULL; 171 address StubRoutines::_safefetch32_continuation_pc = NULL; 172 address StubRoutines::_safefetchN_entry = NULL; 173 address StubRoutines::_safefetchN_fault_pc = NULL; 174 address StubRoutines::_safefetchN_continuation_pc = NULL; 175 176 // Initialization 177 // 178 // Note: to break cycle with universe initialization, stubs are generated in two phases. 179 // The first one generates stubs needed during universe init (e.g., _handle_must_compile_first_entry). 180 // The second phase includes all other stubs (which may depend on universe being initialized.) 181 182 extern void StubGenerator_generate(CodeBuffer* code, bool all); // only interface to generators 183 184 void StubRoutines::initialize1() { 185 if (_code1 == NULL) { 186 ResourceMark rm; 187 TraceTime timer("StubRoutines generation 1", TRACETIME_LOG(Info, startuptime)); 188 _code1 = BufferBlob::create("StubRoutines (1)", code_size1); 189 if (_code1 == NULL) { 190 vm_exit_out_of_memory(code_size1, OOM_MALLOC_ERROR, "CodeCache: no room for StubRoutines (1)"); 191 } 192 CodeBuffer buffer(_code1); 193 StubGenerator_generate(&buffer, false); 194 // When new stubs added we need to make sure there is some space left 195 // to catch situation when we should increase size again. 196 assert(code_size1 == 0 || buffer.insts_remaining() > 200, "increase code_size1"); 197 } 198 } 199 200 201 #ifdef ASSERT 202 typedef void (*arraycopy_fn)(address src, address dst, int count); 203 204 // simple tests of generated arraycopy functions 205 static void test_arraycopy_func(address func, int alignment) { 206 int v = 0xcc; 207 int v2 = 0x11; 208 jlong lbuffer[8]; 209 jlong lbuffer2[8]; 210 address fbuffer = (address) lbuffer; 211 address fbuffer2 = (address) lbuffer2; 212 unsigned int i; 213 for (i = 0; i < sizeof(lbuffer); i++) { 214 fbuffer[i] = v; fbuffer2[i] = v2; 215 } 216 // C++ does not guarantee jlong[] array alignment to 8 bytes. 217 // Use middle of array to check that memory before it is not modified. 218 address buffer = (address) round_to((intptr_t)&lbuffer[4], BytesPerLong); 219 address buffer2 = (address) round_to((intptr_t)&lbuffer2[4], BytesPerLong); 220 // do an aligned copy 221 ((arraycopy_fn)func)(buffer, buffer2, 0); 222 for (i = 0; i < sizeof(lbuffer); i++) { 223 assert(fbuffer[i] == v && fbuffer2[i] == v2, "shouldn't have copied anything"); 224 } 225 // adjust destination alignment 226 ((arraycopy_fn)func)(buffer, buffer2 + alignment, 0); 227 for (i = 0; i < sizeof(lbuffer); i++) { 228 assert(fbuffer[i] == v && fbuffer2[i] == v2, "shouldn't have copied anything"); 229 } 230 // adjust source alignment 231 ((arraycopy_fn)func)(buffer + alignment, buffer2, 0); 232 for (i = 0; i < sizeof(lbuffer); i++) { 233 assert(fbuffer[i] == v && fbuffer2[i] == v2, "shouldn't have copied anything"); 234 } 235 } 236 237 // simple test for SafeFetch32 238 static void test_safefetch32() { 239 if (CanUseSafeFetch32()) { 240 int dummy = 17; 241 int* const p_invalid = (int*) get_segfault_address(); 242 int* const p_valid = &dummy; 243 int result_invalid = SafeFetch32(p_invalid, 0xABC); 244 assert(result_invalid == 0xABC, "SafeFetch32 error"); 245 int result_valid = SafeFetch32(p_valid, 0xABC); 246 assert(result_valid == 17, "SafeFetch32 error"); 247 } 248 } 249 250 // simple test for SafeFetchN 251 static void test_safefetchN() { 252 if (CanUseSafeFetchN()) { 253 #ifdef _LP64 254 const intptr_t v1 = UCONST64(0xABCD00000000ABCD); 255 const intptr_t v2 = UCONST64(0xDEFD00000000DEFD); 256 #else 257 const intptr_t v1 = 0xABCDABCD; 258 const intptr_t v2 = 0xDEFDDEFD; 259 #endif 260 intptr_t dummy = v1; 261 intptr_t* const p_invalid = (intptr_t*) get_segfault_address(); 262 intptr_t* const p_valid = &dummy; 263 intptr_t result_invalid = SafeFetchN(p_invalid, v2); 264 assert(result_invalid == v2, "SafeFetchN error"); 265 intptr_t result_valid = SafeFetchN(p_valid, v2); 266 assert(result_valid == v1, "SafeFetchN error"); 267 } 268 } 269 #endif 270 271 void StubRoutines::initialize2() { 272 if (_code2 == NULL) { 273 ResourceMark rm; 274 TraceTime timer("StubRoutines generation 2", TRACETIME_LOG(Info, startuptime)); 275 _code2 = BufferBlob::create("StubRoutines (2)", code_size2); 276 if (_code2 == NULL) { 277 vm_exit_out_of_memory(code_size2, OOM_MALLOC_ERROR, "CodeCache: no room for StubRoutines (2)"); 278 } 279 CodeBuffer buffer(_code2); 280 StubGenerator_generate(&buffer, true); 281 // When new stubs added we need to make sure there is some space left 282 // to catch situation when we should increase size again. 283 assert(code_size2 == 0 || buffer.insts_remaining() > 200, "increase code_size2"); 284 } 285 286 #ifdef ASSERT 287 288 #define TEST_ARRAYCOPY(type) \ 289 test_arraycopy_func( type##_arraycopy(), sizeof(type)); \ 290 test_arraycopy_func( type##_disjoint_arraycopy(), sizeof(type)); \ 291 test_arraycopy_func(arrayof_##type##_arraycopy(), sizeof(HeapWord)); \ 292 test_arraycopy_func(arrayof_##type##_disjoint_arraycopy(), sizeof(HeapWord)) 293 294 // Make sure all the arraycopy stubs properly handle zero count 295 TEST_ARRAYCOPY(jbyte); 296 TEST_ARRAYCOPY(jshort); 297 TEST_ARRAYCOPY(jint); 298 TEST_ARRAYCOPY(jlong); 299 300 #undef TEST_ARRAYCOPY 301 302 #define TEST_FILL(type) \ 303 if (_##type##_fill != NULL) { \ 304 union { \ 305 double d; \ 306 type body[96]; \ 307 } s; \ 308 \ 309 int v = 32; \ 310 for (int offset = -2; offset <= 2; offset++) { \ 311 for (int i = 0; i < 96; i++) { \ 312 s.body[i] = 1; \ 313 } \ 314 type* start = s.body + 8 + offset; \ 315 for (int aligned = 0; aligned < 2; aligned++) { \ 316 if (aligned) { \ 317 if (((intptr_t)start) % HeapWordSize == 0) { \ 318 ((void (*)(type*, int, int))StubRoutines::_arrayof_##type##_fill)(start, v, 80); \ 319 } else { \ 320 continue; \ 321 } \ 322 } else { \ 323 ((void (*)(type*, int, int))StubRoutines::_##type##_fill)(start, v, 80); \ 324 } \ 325 for (int i = 0; i < 96; i++) { \ 326 if (i < (8 + offset) || i >= (88 + offset)) { \ 327 assert(s.body[i] == 1, "what?"); \ 328 } else { \ 329 assert(s.body[i] == 32, "what?"); \ 330 } \ 331 } \ 332 } \ 333 } \ 334 } \ 335 336 TEST_FILL(jbyte); 337 TEST_FILL(jshort); 338 TEST_FILL(jint); 339 340 #undef TEST_FILL 341 342 #define TEST_COPYRTN(type) \ 343 test_arraycopy_func(CAST_FROM_FN_PTR(address, Copy::conjoint_##type##s_atomic), sizeof(type)); \ 344 test_arraycopy_func(CAST_FROM_FN_PTR(address, Copy::arrayof_conjoint_##type##s), (int)MAX2(sizeof(HeapWord), sizeof(type))) 345 346 // Make sure all the copy runtime routines properly handle zero count 347 TEST_COPYRTN(jbyte); 348 TEST_COPYRTN(jshort); 349 TEST_COPYRTN(jint); 350 TEST_COPYRTN(jlong); 351 352 #undef TEST_COPYRTN 353 354 test_arraycopy_func(CAST_FROM_FN_PTR(address, Copy::conjoint_words), sizeof(HeapWord)); 355 test_arraycopy_func(CAST_FROM_FN_PTR(address, Copy::disjoint_words), sizeof(HeapWord)); 356 test_arraycopy_func(CAST_FROM_FN_PTR(address, Copy::disjoint_words_atomic), sizeof(HeapWord)); 357 // Aligned to BytesPerLong 358 test_arraycopy_func(CAST_FROM_FN_PTR(address, Copy::aligned_conjoint_words), sizeof(jlong)); 359 test_arraycopy_func(CAST_FROM_FN_PTR(address, Copy::aligned_disjoint_words), sizeof(jlong)); 360 361 // test safefetch routines 362 // Not on Windows 32bit until 8074860 is fixed 363 #if ! (defined(_WIN32) && defined(_M_IX86)) 364 test_safefetch32(); 365 test_safefetchN(); 366 #endif 367 368 #endif 369 } 370 371 372 void stubRoutines_init1() { StubRoutines::initialize1(); } 373 void stubRoutines_init2() { StubRoutines::initialize2(); } 374 375 // 376 // Default versions of arraycopy functions 377 // 378 379 static void gen_arraycopy_barrier_pre(oop* dest, size_t count, bool dest_uninitialized) { 380 assert(count != 0, "count should be non-zero"); 381 assert(count <= (size_t)max_intx, "count too large"); 382 BarrierSet* bs = Universe::heap()->barrier_set(); 383 assert(bs->has_write_ref_array_pre_opt(), "Must have pre-barrier opt"); 384 bs->write_ref_array_pre(dest, (int)count, dest_uninitialized); 385 } 386 387 static void gen_arraycopy_barrier(oop* dest, size_t count) { 388 assert(count != 0, "count should be non-zero"); 389 BarrierSet* bs = Universe::heap()->barrier_set(); 390 assert(bs->has_write_ref_array_opt(), "Barrier set must have ref array opt"); 391 bs->write_ref_array((HeapWord*)dest, count); 392 } 393 394 JRT_LEAF(void, StubRoutines::jbyte_copy(jbyte* src, jbyte* dest, size_t count)) 395 #ifndef PRODUCT 396 SharedRuntime::_jbyte_array_copy_ctr++; // Slow-path byte array copy 397 #endif // !PRODUCT 398 Copy::conjoint_jbytes_atomic(src, dest, count); 399 JRT_END 400 401 JRT_LEAF(void, StubRoutines::jshort_copy(jshort* src, jshort* dest, size_t count)) 402 #ifndef PRODUCT 403 SharedRuntime::_jshort_array_copy_ctr++; // Slow-path short/char array copy 404 #endif // !PRODUCT 405 Copy::conjoint_jshorts_atomic(src, dest, count); 406 JRT_END 407 408 JRT_LEAF(void, StubRoutines::jint_copy(jint* src, jint* dest, size_t count)) 409 #ifndef PRODUCT 410 SharedRuntime::_jint_array_copy_ctr++; // Slow-path int/float array copy 411 #endif // !PRODUCT 412 Copy::conjoint_jints_atomic(src, dest, count); 413 JRT_END 414 415 JRT_LEAF(void, StubRoutines::jlong_copy(jlong* src, jlong* dest, size_t count)) 416 #ifndef PRODUCT 417 SharedRuntime::_jlong_array_copy_ctr++; // Slow-path long/double array copy 418 #endif // !PRODUCT 419 Copy::conjoint_jlongs_atomic(src, dest, count); 420 JRT_END 421 422 JRT_LEAF(void, StubRoutines::oop_copy(oop* src, oop* dest, size_t count)) 423 #ifndef PRODUCT 424 SharedRuntime::_oop_array_copy_ctr++; // Slow-path oop array copy 425 #endif // !PRODUCT 426 assert(count != 0, "count should be non-zero"); 427 gen_arraycopy_barrier_pre(dest, count, /*dest_uninitialized*/false); 428 Copy::conjoint_oops_atomic(src, dest, count); 429 gen_arraycopy_barrier(dest, count); 430 JRT_END 431 432 JRT_LEAF(void, StubRoutines::oop_copy_uninit(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 gen_arraycopy_barrier_pre(dest, count, /*dest_uninitialized*/true); 438 Copy::conjoint_oops_atomic(src, dest, count); 439 gen_arraycopy_barrier(dest, count); 440 JRT_END 441 442 JRT_LEAF(void, StubRoutines::arrayof_jbyte_copy(HeapWord* src, HeapWord* dest, size_t count)) 443 #ifndef PRODUCT 444 SharedRuntime::_jbyte_array_copy_ctr++; // Slow-path byte array copy 445 #endif // !PRODUCT 446 Copy::arrayof_conjoint_jbytes(src, dest, count); 447 JRT_END 448 449 JRT_LEAF(void, StubRoutines::arrayof_jshort_copy(HeapWord* src, HeapWord* dest, size_t count)) 450 #ifndef PRODUCT 451 SharedRuntime::_jshort_array_copy_ctr++; // Slow-path short/char array copy 452 #endif // !PRODUCT 453 Copy::arrayof_conjoint_jshorts(src, dest, count); 454 JRT_END 455 456 JRT_LEAF(void, StubRoutines::arrayof_jint_copy(HeapWord* src, HeapWord* dest, size_t count)) 457 #ifndef PRODUCT 458 SharedRuntime::_jint_array_copy_ctr++; // Slow-path int/float array copy 459 #endif // !PRODUCT 460 Copy::arrayof_conjoint_jints(src, dest, count); 461 JRT_END 462 463 JRT_LEAF(void, StubRoutines::arrayof_jlong_copy(HeapWord* src, HeapWord* dest, size_t count)) 464 #ifndef PRODUCT 465 SharedRuntime::_jlong_array_copy_ctr++; // Slow-path int/float array copy 466 #endif // !PRODUCT 467 Copy::arrayof_conjoint_jlongs(src, dest, count); 468 JRT_END 469 470 JRT_LEAF(void, StubRoutines::arrayof_oop_copy(HeapWord* src, HeapWord* dest, size_t count)) 471 #ifndef PRODUCT 472 SharedRuntime::_oop_array_copy_ctr++; // Slow-path oop array copy 473 #endif // !PRODUCT 474 assert(count != 0, "count should be non-zero"); 475 gen_arraycopy_barrier_pre((oop *) dest, count, /*dest_uninitialized*/false); 476 Copy::arrayof_conjoint_oops(src, dest, count); 477 gen_arraycopy_barrier((oop *) dest, count); 478 JRT_END 479 480 JRT_LEAF(void, StubRoutines::arrayof_oop_copy_uninit(HeapWord* src, HeapWord* dest, size_t count)) 481 #ifndef PRODUCT 482 SharedRuntime::_oop_array_copy_ctr++; // Slow-path oop array copy 483 #endif // !PRODUCT 484 assert(count != 0, "count should be non-zero"); 485 gen_arraycopy_barrier_pre((oop *) dest, count, /*dest_uninitialized*/true); 486 Copy::arrayof_conjoint_oops(src, dest, count); 487 gen_arraycopy_barrier((oop *) dest, count); 488 JRT_END 489 490 address StubRoutines::select_fill_function(BasicType t, bool aligned, const char* &name) { 491 #define RETURN_STUB(xxx_fill) { \ 492 name = #xxx_fill; \ 493 return StubRoutines::xxx_fill(); } 494 495 switch (t) { 496 case T_BYTE: 497 case T_BOOLEAN: 498 if (!aligned) RETURN_STUB(jbyte_fill); 499 RETURN_STUB(arrayof_jbyte_fill); 500 case T_CHAR: 501 case T_SHORT: 502 if (!aligned) RETURN_STUB(jshort_fill); 503 RETURN_STUB(arrayof_jshort_fill); 504 case T_INT: 505 case T_FLOAT: 506 if (!aligned) RETURN_STUB(jint_fill); 507 RETURN_STUB(arrayof_jint_fill); 508 case T_DOUBLE: 509 case T_LONG: 510 case T_ARRAY: 511 case T_OBJECT: 512 case T_NARROWOOP: 513 case T_NARROWKLASS: 514 case T_ADDRESS: 515 // Currently unsupported 516 return NULL; 517 518 default: 519 ShouldNotReachHere(); 520 return NULL; 521 } 522 523 #undef RETURN_STUB 524 } 525 526 // constants for computing the copy function 527 enum { 528 COPYFUNC_UNALIGNED = 0, 529 COPYFUNC_ALIGNED = 1, // src, dest aligned to HeapWordSize 530 COPYFUNC_CONJOINT = 0, 531 COPYFUNC_DISJOINT = 2 // src != dest, or transfer can descend 532 }; 533 534 // Note: The condition "disjoint" applies also for overlapping copies 535 // where an descending copy is permitted (i.e., dest_offset <= src_offset). 536 address 537 StubRoutines::select_arraycopy_function(BasicType t, bool aligned, bool disjoint, const char* &name, bool dest_uninitialized) { 538 int selector = 539 (aligned ? COPYFUNC_ALIGNED : COPYFUNC_UNALIGNED) + 540 (disjoint ? COPYFUNC_DISJOINT : COPYFUNC_CONJOINT); 541 542 #define RETURN_STUB(xxx_arraycopy) { \ 543 name = #xxx_arraycopy; \ 544 return StubRoutines::xxx_arraycopy(); } 545 546 #define RETURN_STUB_PARM(xxx_arraycopy, parm) { \ 547 name = #xxx_arraycopy; \ 548 return StubRoutines::xxx_arraycopy(parm); } 549 550 switch (t) { 551 case T_BYTE: 552 case T_BOOLEAN: 553 switch (selector) { 554 case COPYFUNC_CONJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jbyte_arraycopy); 555 case COPYFUNC_CONJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jbyte_arraycopy); 556 case COPYFUNC_DISJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jbyte_disjoint_arraycopy); 557 case COPYFUNC_DISJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jbyte_disjoint_arraycopy); 558 } 559 case T_CHAR: 560 case T_SHORT: 561 switch (selector) { 562 case COPYFUNC_CONJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jshort_arraycopy); 563 case COPYFUNC_CONJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jshort_arraycopy); 564 case COPYFUNC_DISJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jshort_disjoint_arraycopy); 565 case COPYFUNC_DISJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jshort_disjoint_arraycopy); 566 } 567 case T_INT: 568 case T_FLOAT: 569 switch (selector) { 570 case COPYFUNC_CONJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jint_arraycopy); 571 case COPYFUNC_CONJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jint_arraycopy); 572 case COPYFUNC_DISJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jint_disjoint_arraycopy); 573 case COPYFUNC_DISJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jint_disjoint_arraycopy); 574 } 575 case T_DOUBLE: 576 case T_LONG: 577 switch (selector) { 578 case COPYFUNC_CONJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jlong_arraycopy); 579 case COPYFUNC_CONJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jlong_arraycopy); 580 case COPYFUNC_DISJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jlong_disjoint_arraycopy); 581 case COPYFUNC_DISJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jlong_disjoint_arraycopy); 582 } 583 case T_ARRAY: 584 case T_OBJECT: 585 switch (selector) { 586 case COPYFUNC_CONJOINT | COPYFUNC_UNALIGNED: RETURN_STUB_PARM(oop_arraycopy, dest_uninitialized); 587 case COPYFUNC_CONJOINT | COPYFUNC_ALIGNED: RETURN_STUB_PARM(arrayof_oop_arraycopy, dest_uninitialized); 588 case COPYFUNC_DISJOINT | COPYFUNC_UNALIGNED: RETURN_STUB_PARM(oop_disjoint_arraycopy, dest_uninitialized); 589 case COPYFUNC_DISJOINT | COPYFUNC_ALIGNED: RETURN_STUB_PARM(arrayof_oop_disjoint_arraycopy, dest_uninitialized); 590 } 591 default: 592 ShouldNotReachHere(); 593 return NULL; 594 } 595 596 #undef RETURN_STUB 597 #undef RETURN_STUB_PARM 598 }