1 /* 2 * Copyright (c) 1997, 2015, 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/sharedRuntime.hpp" 31 #include "runtime/stubRoutines.hpp" 32 #include "runtime/timer.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::_handler_for_unsafe_access_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::_ghash_processBlocks = NULL; 129 130 address StubRoutines::_sha1_implCompress = NULL; 131 address StubRoutines::_sha1_implCompressMB = NULL; 132 address StubRoutines::_sha256_implCompress = NULL; 133 address StubRoutines::_sha256_implCompressMB = NULL; 134 address StubRoutines::_sha512_implCompress = NULL; 135 address StubRoutines::_sha512_implCompressMB = NULL; 136 137 address StubRoutines::_updateBytesCRC32 = NULL; 138 address StubRoutines::_crc_table_adr = NULL; 139 140 address StubRoutines::_updateBytesCRC32C = NULL; 141 142 address StubRoutines::_multiplyToLen = NULL; 143 address StubRoutines::_squareToLen = NULL; 144 address StubRoutines::_mulAdd = NULL; 145 146 double (* StubRoutines::_intrinsic_log )(double) = NULL; 147 double (* StubRoutines::_intrinsic_log10 )(double) = NULL; 148 double (* StubRoutines::_intrinsic_exp )(double) = NULL; 149 double (* StubRoutines::_intrinsic_pow )(double, double) = NULL; 150 double (* StubRoutines::_intrinsic_sin )(double) = NULL; 151 double (* StubRoutines::_intrinsic_cos )(double) = NULL; 152 double (* StubRoutines::_intrinsic_tan )(double) = NULL; 153 154 address StubRoutines::_safefetch32_entry = NULL; 155 address StubRoutines::_safefetch32_fault_pc = NULL; 156 address StubRoutines::_safefetch32_continuation_pc = NULL; 157 address StubRoutines::_safefetchN_entry = NULL; 158 address StubRoutines::_safefetchN_fault_pc = NULL; 159 address StubRoutines::_safefetchN_continuation_pc = NULL; 160 161 // Initialization 162 // 163 // Note: to break cycle with universe initialization, stubs are generated in two phases. 164 // The first one generates stubs needed during universe init (e.g., _handle_must_compile_first_entry). 165 // The second phase includes all other stubs (which may depend on universe being initialized.) 166 167 extern void StubGenerator_generate(CodeBuffer* code, bool all); // only interface to generators 168 169 void StubRoutines::initialize1() { 170 if (_code1 == NULL) { 171 ResourceMark rm; 172 TraceTime timer("StubRoutines generation 1", TraceStartupTime); 173 _code1 = BufferBlob::create("StubRoutines (1)", code_size1); 174 if (_code1 == NULL) { 175 vm_exit_out_of_memory(code_size1, OOM_MALLOC_ERROR, "CodeCache: no room for StubRoutines (1)"); 176 } 177 CodeBuffer buffer(_code1); 178 StubGenerator_generate(&buffer, false); 179 // When new stubs added we need to make sure there is some space left 180 // to catch situation when we should increase size again. 181 assert(buffer.insts_remaining() > 200, "increase code_size1"); 182 } 183 } 184 185 186 #ifdef ASSERT 187 typedef void (*arraycopy_fn)(address src, address dst, int count); 188 189 // simple tests of generated arraycopy functions 190 static void test_arraycopy_func(address func, int alignment) { 191 int v = 0xcc; 192 int v2 = 0x11; 193 jlong lbuffer[8]; 194 jlong lbuffer2[8]; 195 address fbuffer = (address) lbuffer; 196 address fbuffer2 = (address) lbuffer2; 197 unsigned int i; 198 for (i = 0; i < sizeof(lbuffer); i++) { 199 fbuffer[i] = v; fbuffer2[i] = v2; 200 } 201 // C++ does not guarantee jlong[] array alignment to 8 bytes. 202 // Use middle of array to check that memory before it is not modified. 203 address buffer = (address) round_to((intptr_t)&lbuffer[4], BytesPerLong); 204 address buffer2 = (address) round_to((intptr_t)&lbuffer2[4], BytesPerLong); 205 // do an aligned copy 206 ((arraycopy_fn)func)(buffer, buffer2, 0); 207 for (i = 0; i < sizeof(lbuffer); i++) { 208 assert(fbuffer[i] == v && fbuffer2[i] == v2, "shouldn't have copied anything"); 209 } 210 // adjust destination alignment 211 ((arraycopy_fn)func)(buffer, buffer2 + alignment, 0); 212 for (i = 0; i < sizeof(lbuffer); i++) { 213 assert(fbuffer[i] == v && fbuffer2[i] == v2, "shouldn't have copied anything"); 214 } 215 // adjust source alignment 216 ((arraycopy_fn)func)(buffer + alignment, buffer2, 0); 217 for (i = 0; i < sizeof(lbuffer); i++) { 218 assert(fbuffer[i] == v && fbuffer2[i] == v2, "shouldn't have copied anything"); 219 } 220 } 221 222 // simple test for SafeFetch32 223 static void test_safefetch32() { 224 if (CanUseSafeFetch32()) { 225 int dummy = 17; 226 int* const p_invalid = (int*) get_segfault_address(); 227 int* const p_valid = &dummy; 228 int result_invalid = SafeFetch32(p_invalid, 0xABC); 229 assert(result_invalid == 0xABC, "SafeFetch32 error"); 230 int result_valid = SafeFetch32(p_valid, 0xABC); 231 assert(result_valid == 17, "SafeFetch32 error"); 232 } 233 } 234 235 // simple test for SafeFetchN 236 static void test_safefetchN() { 237 if (CanUseSafeFetchN()) { 238 #ifdef _LP64 239 const intptr_t v1 = UCONST64(0xABCD00000000ABCD); 240 const intptr_t v2 = UCONST64(0xDEFD00000000DEFD); 241 #else 242 const intptr_t v1 = 0xABCDABCD; 243 const intptr_t v2 = 0xDEFDDEFD; 244 #endif 245 intptr_t dummy = v1; 246 intptr_t* const p_invalid = (intptr_t*) get_segfault_address(); 247 intptr_t* const p_valid = &dummy; 248 intptr_t result_invalid = SafeFetchN(p_invalid, v2); 249 assert(result_invalid == v2, "SafeFetchN error"); 250 intptr_t result_valid = SafeFetchN(p_valid, v2); 251 assert(result_valid == v1, "SafeFetchN error"); 252 } 253 } 254 #endif 255 256 void StubRoutines::initialize2() { 257 if (_code2 == NULL) { 258 ResourceMark rm; 259 TraceTime timer("StubRoutines generation 2", TraceStartupTime); 260 _code2 = BufferBlob::create("StubRoutines (2)", code_size2); 261 if (_code2 == NULL) { 262 vm_exit_out_of_memory(code_size2, OOM_MALLOC_ERROR, "CodeCache: no room for StubRoutines (2)"); 263 } 264 CodeBuffer buffer(_code2); 265 StubGenerator_generate(&buffer, true); 266 // When new stubs added we need to make sure there is some space left 267 // to catch situation when we should increase size again. 268 assert(buffer.insts_remaining() > 200, "increase code_size2"); 269 } 270 271 #ifdef ASSERT 272 273 #define TEST_ARRAYCOPY(type) \ 274 test_arraycopy_func( type##_arraycopy(), sizeof(type)); \ 275 test_arraycopy_func( type##_disjoint_arraycopy(), sizeof(type)); \ 276 test_arraycopy_func(arrayof_##type##_arraycopy(), sizeof(HeapWord)); \ 277 test_arraycopy_func(arrayof_##type##_disjoint_arraycopy(), sizeof(HeapWord)) 278 279 // Make sure all the arraycopy stubs properly handle zero count 280 TEST_ARRAYCOPY(jbyte); 281 TEST_ARRAYCOPY(jshort); 282 TEST_ARRAYCOPY(jint); 283 TEST_ARRAYCOPY(jlong); 284 285 #undef TEST_ARRAYCOPY 286 287 #define TEST_FILL(type) \ 288 if (_##type##_fill != NULL) { \ 289 union { \ 290 double d; \ 291 type body[96]; \ 292 } s; \ 293 \ 294 int v = 32; \ 295 for (int offset = -2; offset <= 2; offset++) { \ 296 for (int i = 0; i < 96; i++) { \ 297 s.body[i] = 1; \ 298 } \ 299 type* start = s.body + 8 + offset; \ 300 for (int aligned = 0; aligned < 2; aligned++) { \ 301 if (aligned) { \ 302 if (((intptr_t)start) % HeapWordSize == 0) { \ 303 ((void (*)(type*, int, int))StubRoutines::_arrayof_##type##_fill)(start, v, 80); \ 304 } else { \ 305 continue; \ 306 } \ 307 } else { \ 308 ((void (*)(type*, int, int))StubRoutines::_##type##_fill)(start, v, 80); \ 309 } \ 310 for (int i = 0; i < 96; i++) { \ 311 if (i < (8 + offset) || i >= (88 + offset)) { \ 312 assert(s.body[i] == 1, "what?"); \ 313 } else { \ 314 assert(s.body[i] == 32, "what?"); \ 315 } \ 316 } \ 317 } \ 318 } \ 319 } \ 320 321 TEST_FILL(jbyte); 322 TEST_FILL(jshort); 323 TEST_FILL(jint); 324 325 #undef TEST_FILL 326 327 #define TEST_COPYRTN(type) \ 328 test_arraycopy_func(CAST_FROM_FN_PTR(address, Copy::conjoint_##type##s_atomic), sizeof(type)); \ 329 test_arraycopy_func(CAST_FROM_FN_PTR(address, Copy::arrayof_conjoint_##type##s), (int)MAX2(sizeof(HeapWord), sizeof(type))) 330 331 // Make sure all the copy runtime routines properly handle zero count 332 TEST_COPYRTN(jbyte); 333 TEST_COPYRTN(jshort); 334 TEST_COPYRTN(jint); 335 TEST_COPYRTN(jlong); 336 337 #undef TEST_COPYRTN 338 339 test_arraycopy_func(CAST_FROM_FN_PTR(address, Copy::conjoint_words), sizeof(HeapWord)); 340 test_arraycopy_func(CAST_FROM_FN_PTR(address, Copy::disjoint_words), sizeof(HeapWord)); 341 test_arraycopy_func(CAST_FROM_FN_PTR(address, Copy::disjoint_words_atomic), sizeof(HeapWord)); 342 // Aligned to BytesPerLong 343 test_arraycopy_func(CAST_FROM_FN_PTR(address, Copy::aligned_conjoint_words), sizeof(jlong)); 344 test_arraycopy_func(CAST_FROM_FN_PTR(address, Copy::aligned_disjoint_words), sizeof(jlong)); 345 346 // test safefetch routines 347 // Not on Windows 32bit until 8074860 is fixed 348 #if ! (defined(_WIN32) && defined(_M_IX86)) 349 test_safefetch32(); 350 test_safefetchN(); 351 #endif 352 353 #endif 354 } 355 356 357 void stubRoutines_init1() { StubRoutines::initialize1(); } 358 void stubRoutines_init2() { StubRoutines::initialize2(); } 359 360 // 361 // Default versions of arraycopy functions 362 // 363 364 static void gen_arraycopy_barrier_pre(oop* dest, size_t count, bool dest_uninitialized) { 365 assert(count != 0, "count should be non-zero"); 366 assert(count <= (size_t)max_intx, "count too large"); 367 BarrierSet* bs = Universe::heap()->barrier_set(); 368 assert(bs->has_write_ref_array_pre_opt(), "Must have pre-barrier opt"); 369 bs->write_ref_array_pre(dest, (int)count, dest_uninitialized); 370 } 371 372 static void gen_arraycopy_barrier(oop* dest, size_t count) { 373 assert(count != 0, "count should be non-zero"); 374 BarrierSet* bs = Universe::heap()->barrier_set(); 375 assert(bs->has_write_ref_array_opt(), "Barrier set must have ref array opt"); 376 bs->write_ref_array((HeapWord*)dest, count); 377 } 378 379 JRT_LEAF(void, StubRoutines::jbyte_copy(jbyte* src, jbyte* dest, size_t count)) 380 #ifndef PRODUCT 381 SharedRuntime::_jbyte_array_copy_ctr++; // Slow-path byte array copy 382 #endif // !PRODUCT 383 Copy::conjoint_jbytes_atomic(src, dest, count); 384 JRT_END 385 386 JRT_LEAF(void, StubRoutines::jshort_copy(jshort* src, jshort* dest, size_t count)) 387 #ifndef PRODUCT 388 SharedRuntime::_jshort_array_copy_ctr++; // Slow-path short/char array copy 389 #endif // !PRODUCT 390 Copy::conjoint_jshorts_atomic(src, dest, count); 391 JRT_END 392 393 JRT_LEAF(void, StubRoutines::jint_copy(jint* src, jint* dest, size_t count)) 394 #ifndef PRODUCT 395 SharedRuntime::_jint_array_copy_ctr++; // Slow-path int/float array copy 396 #endif // !PRODUCT 397 Copy::conjoint_jints_atomic(src, dest, count); 398 JRT_END 399 400 JRT_LEAF(void, StubRoutines::jlong_copy(jlong* src, jlong* dest, size_t count)) 401 #ifndef PRODUCT 402 SharedRuntime::_jlong_array_copy_ctr++; // Slow-path long/double array copy 403 #endif // !PRODUCT 404 Copy::conjoint_jlongs_atomic(src, dest, count); 405 JRT_END 406 407 JRT_LEAF(void, StubRoutines::oop_copy(oop* src, oop* dest, size_t count)) 408 #ifndef PRODUCT 409 SharedRuntime::_oop_array_copy_ctr++; // Slow-path oop array copy 410 #endif // !PRODUCT 411 assert(count != 0, "count should be non-zero"); 412 gen_arraycopy_barrier_pre(dest, count, /*dest_uninitialized*/false); 413 Copy::conjoint_oops_atomic(src, dest, count); 414 gen_arraycopy_barrier(dest, count); 415 JRT_END 416 417 JRT_LEAF(void, StubRoutines::oop_copy_uninit(oop* src, oop* dest, size_t count)) 418 #ifndef PRODUCT 419 SharedRuntime::_oop_array_copy_ctr++; // Slow-path oop array copy 420 #endif // !PRODUCT 421 assert(count != 0, "count should be non-zero"); 422 gen_arraycopy_barrier_pre(dest, count, /*dest_uninitialized*/true); 423 Copy::conjoint_oops_atomic(src, dest, count); 424 gen_arraycopy_barrier(dest, count); 425 JRT_END 426 427 JRT_LEAF(void, StubRoutines::arrayof_jbyte_copy(HeapWord* src, HeapWord* dest, size_t count)) 428 #ifndef PRODUCT 429 SharedRuntime::_jbyte_array_copy_ctr++; // Slow-path byte array copy 430 #endif // !PRODUCT 431 Copy::arrayof_conjoint_jbytes(src, dest, count); 432 JRT_END 433 434 JRT_LEAF(void, StubRoutines::arrayof_jshort_copy(HeapWord* src, HeapWord* dest, size_t count)) 435 #ifndef PRODUCT 436 SharedRuntime::_jshort_array_copy_ctr++; // Slow-path short/char array copy 437 #endif // !PRODUCT 438 Copy::arrayof_conjoint_jshorts(src, dest, count); 439 JRT_END 440 441 JRT_LEAF(void, StubRoutines::arrayof_jint_copy(HeapWord* src, HeapWord* dest, size_t count)) 442 #ifndef PRODUCT 443 SharedRuntime::_jint_array_copy_ctr++; // Slow-path int/float array copy 444 #endif // !PRODUCT 445 Copy::arrayof_conjoint_jints(src, dest, count); 446 JRT_END 447 448 JRT_LEAF(void, StubRoutines::arrayof_jlong_copy(HeapWord* src, HeapWord* dest, size_t count)) 449 #ifndef PRODUCT 450 SharedRuntime::_jlong_array_copy_ctr++; // Slow-path int/float array copy 451 #endif // !PRODUCT 452 Copy::arrayof_conjoint_jlongs(src, dest, count); 453 JRT_END 454 455 JRT_LEAF(void, StubRoutines::arrayof_oop_copy(HeapWord* src, HeapWord* dest, size_t count)) 456 #ifndef PRODUCT 457 SharedRuntime::_oop_array_copy_ctr++; // Slow-path oop array copy 458 #endif // !PRODUCT 459 assert(count != 0, "count should be non-zero"); 460 gen_arraycopy_barrier_pre((oop *) dest, count, /*dest_uninitialized*/false); 461 Copy::arrayof_conjoint_oops(src, dest, count); 462 gen_arraycopy_barrier((oop *) dest, count); 463 JRT_END 464 465 JRT_LEAF(void, StubRoutines::arrayof_oop_copy_uninit(HeapWord* src, HeapWord* dest, size_t count)) 466 #ifndef PRODUCT 467 SharedRuntime::_oop_array_copy_ctr++; // Slow-path oop array copy 468 #endif // !PRODUCT 469 assert(count != 0, "count should be non-zero"); 470 gen_arraycopy_barrier_pre((oop *) dest, count, /*dest_uninitialized*/true); 471 Copy::arrayof_conjoint_oops(src, dest, count); 472 gen_arraycopy_barrier((oop *) dest, count); 473 JRT_END 474 475 address StubRoutines::select_fill_function(BasicType t, bool aligned, const char* &name) { 476 #define RETURN_STUB(xxx_fill) { \ 477 name = #xxx_fill; \ 478 return StubRoutines::xxx_fill(); } 479 480 switch (t) { 481 case T_BYTE: 482 case T_BOOLEAN: 483 if (!aligned) RETURN_STUB(jbyte_fill); 484 RETURN_STUB(arrayof_jbyte_fill); 485 case T_CHAR: 486 case T_SHORT: 487 if (!aligned) RETURN_STUB(jshort_fill); 488 RETURN_STUB(arrayof_jshort_fill); 489 case T_INT: 490 case T_FLOAT: 491 if (!aligned) RETURN_STUB(jint_fill); 492 RETURN_STUB(arrayof_jint_fill); 493 case T_DOUBLE: 494 case T_LONG: 495 case T_ARRAY: 496 case T_OBJECT: 497 case T_NARROWOOP: 498 case T_NARROWKLASS: 499 case T_ADDRESS: 500 // Currently unsupported 501 return NULL; 502 503 default: 504 ShouldNotReachHere(); 505 return NULL; 506 } 507 508 #undef RETURN_STUB 509 } 510 511 // constants for computing the copy function 512 enum { 513 COPYFUNC_UNALIGNED = 0, 514 COPYFUNC_ALIGNED = 1, // src, dest aligned to HeapWordSize 515 COPYFUNC_CONJOINT = 0, 516 COPYFUNC_DISJOINT = 2 // src != dest, or transfer can descend 517 }; 518 519 // Note: The condition "disjoint" applies also for overlapping copies 520 // where an descending copy is permitted (i.e., dest_offset <= src_offset). 521 address 522 StubRoutines::select_arraycopy_function(BasicType t, bool aligned, bool disjoint, const char* &name, bool dest_uninitialized) { 523 int selector = 524 (aligned ? COPYFUNC_ALIGNED : COPYFUNC_UNALIGNED) + 525 (disjoint ? COPYFUNC_DISJOINT : COPYFUNC_CONJOINT); 526 527 #define RETURN_STUB(xxx_arraycopy) { \ 528 name = #xxx_arraycopy; \ 529 return StubRoutines::xxx_arraycopy(); } 530 531 #define RETURN_STUB_PARM(xxx_arraycopy, parm) { \ 532 name = #xxx_arraycopy; \ 533 return StubRoutines::xxx_arraycopy(parm); } 534 535 switch (t) { 536 case T_BYTE: 537 case T_BOOLEAN: 538 switch (selector) { 539 case COPYFUNC_CONJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jbyte_arraycopy); 540 case COPYFUNC_CONJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jbyte_arraycopy); 541 case COPYFUNC_DISJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jbyte_disjoint_arraycopy); 542 case COPYFUNC_DISJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jbyte_disjoint_arraycopy); 543 } 544 case T_CHAR: 545 case T_SHORT: 546 switch (selector) { 547 case COPYFUNC_CONJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jshort_arraycopy); 548 case COPYFUNC_CONJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jshort_arraycopy); 549 case COPYFUNC_DISJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jshort_disjoint_arraycopy); 550 case COPYFUNC_DISJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jshort_disjoint_arraycopy); 551 } 552 case T_INT: 553 case T_FLOAT: 554 switch (selector) { 555 case COPYFUNC_CONJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jint_arraycopy); 556 case COPYFUNC_CONJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jint_arraycopy); 557 case COPYFUNC_DISJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jint_disjoint_arraycopy); 558 case COPYFUNC_DISJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jint_disjoint_arraycopy); 559 } 560 case T_DOUBLE: 561 case T_LONG: 562 switch (selector) { 563 case COPYFUNC_CONJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jlong_arraycopy); 564 case COPYFUNC_CONJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jlong_arraycopy); 565 case COPYFUNC_DISJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jlong_disjoint_arraycopy); 566 case COPYFUNC_DISJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jlong_disjoint_arraycopy); 567 } 568 case T_ARRAY: 569 case T_OBJECT: 570 switch (selector) { 571 case COPYFUNC_CONJOINT | COPYFUNC_UNALIGNED: RETURN_STUB_PARM(oop_arraycopy, dest_uninitialized); 572 case COPYFUNC_CONJOINT | COPYFUNC_ALIGNED: RETURN_STUB_PARM(arrayof_oop_arraycopy, dest_uninitialized); 573 case COPYFUNC_DISJOINT | COPYFUNC_UNALIGNED: RETURN_STUB_PARM(oop_disjoint_arraycopy, dest_uninitialized); 574 case COPYFUNC_DISJOINT | COPYFUNC_ALIGNED: RETURN_STUB_PARM(arrayof_oop_disjoint_arraycopy, dest_uninitialized); 575 } 576 default: 577 ShouldNotReachHere(); 578 return NULL; 579 } 580 581 #undef RETURN_STUB 582 #undef RETURN_STUB_PARM 583 }