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 "code/codeCacheExtensions.hpp"
  28 #include "logging/log.hpp"
  29 #include "memory/resourceArea.hpp"
  30 #include "oops/oop.inline.hpp"
  31 #include "runtime/interfaceSupport.hpp"
  32 #include "runtime/sharedRuntime.hpp"
  33 #include "runtime/stubRoutines.hpp"
  34 #include "runtime/timer.hpp"
  35 #include "utilities/copy.hpp"
  36 #ifdef COMPILER2
  37 #include "opto/runtime.hpp"
  38 #endif
  39 
  40 
  41 // Implementation of StubRoutines - for a description
  42 // of how to extend it, see the header file.
  43 
  44 // Class Variables
  45 
  46 BufferBlob* StubRoutines::_code1                                = NULL;
  47 BufferBlob* StubRoutines::_code2                                = NULL;
  48 
  49 address StubRoutines::_call_stub_return_address                 = NULL;
  50 address StubRoutines::_call_stub_entry                          = NULL;
  51 
  52 address StubRoutines::_catch_exception_entry                    = NULL;
  53 address StubRoutines::_forward_exception_entry                  = NULL;
  54 address StubRoutines::_throw_AbstractMethodError_entry          = NULL;
  55 address StubRoutines::_throw_IncompatibleClassChangeError_entry = NULL;
  56 address StubRoutines::_throw_NullPointerException_at_call_entry = NULL;
  57 address StubRoutines::_throw_StackOverflowError_entry           = NULL;
  58 address StubRoutines::_throw_delayed_StackOverflowError_entry   = NULL;
  59 address StubRoutines::_handler_for_unsafe_access_entry          = NULL;
  60 jint    StubRoutines::_verify_oop_count                         = 0;
  61 address StubRoutines::_verify_oop_subroutine_entry              = NULL;
  62 address StubRoutines::_atomic_xchg_entry                        = NULL;
  63 address StubRoutines::_atomic_xchg_ptr_entry                    = NULL;
  64 address StubRoutines::_atomic_store_entry                       = NULL;
  65 address StubRoutines::_atomic_store_ptr_entry                   = NULL;
  66 address StubRoutines::_atomic_cmpxchg_entry                     = NULL;
  67 address StubRoutines::_atomic_cmpxchg_ptr_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_ptr_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::_dpow = NULL;
 159 address StubRoutines::_dsin = NULL;
 160 address StubRoutines::_dcos = NULL;
 161 address StubRoutines::_dlibm_sin_cos_huge = NULL;
 162 address StubRoutines::_dlibm_reduce_pi04l = 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",
 188                     log_is_enabled(Info, startuptime),
 189                     LogTag::_startuptime);
 190     _code1 = BufferBlob::create("StubRoutines (1)", code_size1);
 191     if (_code1 == NULL) {
 192       vm_exit_out_of_memory(code_size1, OOM_MALLOC_ERROR, "CodeCache: no room for StubRoutines (1)");
 193     }
 194     CodeBuffer buffer(_code1);
 195     StubGenerator_generate(&buffer, false);
 196     // When new stubs added we need to make sure there is some space left
 197     // to catch situation when we should increase size again.
 198     assert(code_size1 == 0 || buffer.insts_remaining() > 200, "increase code_size1");
 199   }
 200 }
 201 
 202 
 203 #ifdef ASSERT
 204 typedef void (*arraycopy_fn)(address src, address dst, int count);
 205 
 206 // simple tests of generated arraycopy functions
 207 static void test_arraycopy_func(address func, int alignment) {
 208   if (CodeCacheExtensions::use_pregenerated_interpreter() || !CodeCacheExtensions::is_executable(func)) {
 209     // Exit safely if stubs were generated but cannot be used.
 210     // Also excluding pregenerated interpreter since the code may depend on
 211     // some registers being properly initialized (for instance Rthread)
 212     return;
 213   }
 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  = (address) round_to((intptr_t)&lbuffer[4], BytesPerLong);
 227   address buffer2 = (address) round_to((intptr_t)&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*) 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*) 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::initialize2() {
 280   if (_code2 == NULL) {
 281     ResourceMark rm;
 282     TraceTime timer("StubRoutines generation 2",
 283                     log_is_enabled(Info, startuptime),
 284                     LogTag::_startuptime);
 285     _code2 = BufferBlob::create("StubRoutines (2)", code_size2);
 286     if (_code2 == NULL) {
 287       vm_exit_out_of_memory(code_size2, OOM_MALLOC_ERROR, "CodeCache: no room for StubRoutines (2)");
 288     }
 289     CodeBuffer buffer(_code2);
 290     StubGenerator_generate(&buffer, true);
 291     // When new stubs added we need to make sure there is some space left
 292     // to catch situation when we should increase size again.
 293     assert(code_size2 == 0 || buffer.insts_remaining() > 200, "increase code_size2");
 294   }
 295 
 296 #ifdef ASSERT
 297 
 298 #define TEST_ARRAYCOPY(type)                                                    \
 299   test_arraycopy_func(          type##_arraycopy(),          sizeof(type));     \
 300   test_arraycopy_func(          type##_disjoint_arraycopy(), sizeof(type));     \
 301   test_arraycopy_func(arrayof_##type##_arraycopy(),          sizeof(HeapWord)); \
 302   test_arraycopy_func(arrayof_##type##_disjoint_arraycopy(), sizeof(HeapWord))
 303 
 304   // Make sure all the arraycopy stubs properly handle zero count
 305   TEST_ARRAYCOPY(jbyte);
 306   TEST_ARRAYCOPY(jshort);
 307   TEST_ARRAYCOPY(jint);
 308   TEST_ARRAYCOPY(jlong);
 309 
 310 #undef TEST_ARRAYCOPY
 311 
 312 #define TEST_FILL(type)                                                                      \
 313   if (_##type##_fill != NULL) {                                                              \
 314     union {                                                                                  \
 315       double d;                                                                              \
 316       type body[96];                                                                         \
 317     } s;                                                                                     \
 318                                                                                              \
 319     int v = 32;                                                                              \
 320     for (int offset = -2; offset <= 2; offset++) {                                           \
 321       for (int i = 0; i < 96; i++) {                                                         \
 322         s.body[i] = 1;                                                                       \
 323       }                                                                                      \
 324       type* start = s.body + 8 + offset;                                                     \
 325       for (int aligned = 0; aligned < 2; aligned++) {                                        \
 326         if (aligned) {                                                                       \
 327           if (((intptr_t)start) % HeapWordSize == 0) {                                       \
 328             ((void (*)(type*, int, int))StubRoutines::_arrayof_##type##_fill)(start, v, 80); \
 329           } else {                                                                           \
 330             continue;                                                                        \
 331           }                                                                                  \
 332         } else {                                                                             \
 333           ((void (*)(type*, int, int))StubRoutines::_##type##_fill)(start, v, 80);           \
 334         }                                                                                    \
 335         for (int i = 0; i < 96; i++) {                                                       \
 336           if (i < (8 + offset) || i >= (88 + offset)) {                                      \
 337             assert(s.body[i] == 1, "what?");                                                 \
 338           } else {                                                                           \
 339             assert(s.body[i] == 32, "what?");                                                \
 340           }                                                                                  \
 341         }                                                                                    \
 342       }                                                                                      \
 343     }                                                                                        \
 344   }                                                                                          \
 345 
 346   TEST_FILL(jbyte);
 347   TEST_FILL(jshort);
 348   TEST_FILL(jint);
 349 
 350 #undef TEST_FILL
 351 
 352 #define TEST_COPYRTN(type) \
 353   test_arraycopy_func(CAST_FROM_FN_PTR(address, Copy::conjoint_##type##s_atomic),  sizeof(type)); \
 354   test_arraycopy_func(CAST_FROM_FN_PTR(address, Copy::arrayof_conjoint_##type##s), (int)MAX2(sizeof(HeapWord), sizeof(type)))
 355 
 356   // Make sure all the copy runtime routines properly handle zero count
 357   TEST_COPYRTN(jbyte);
 358   TEST_COPYRTN(jshort);
 359   TEST_COPYRTN(jint);
 360   TEST_COPYRTN(jlong);
 361 
 362 #undef TEST_COPYRTN
 363 
 364   test_arraycopy_func(CAST_FROM_FN_PTR(address, Copy::conjoint_words), sizeof(HeapWord));
 365   test_arraycopy_func(CAST_FROM_FN_PTR(address, Copy::disjoint_words), sizeof(HeapWord));
 366   test_arraycopy_func(CAST_FROM_FN_PTR(address, Copy::disjoint_words_atomic), sizeof(HeapWord));
 367   // Aligned to BytesPerLong
 368   test_arraycopy_func(CAST_FROM_FN_PTR(address, Copy::aligned_conjoint_words), sizeof(jlong));
 369   test_arraycopy_func(CAST_FROM_FN_PTR(address, Copy::aligned_disjoint_words), sizeof(jlong));
 370 
 371   // test safefetch routines
 372   // Not on Windows 32bit until 8074860 is fixed
 373 #if ! (defined(_WIN32) && defined(_M_IX86))
 374   test_safefetch32();
 375   test_safefetchN();
 376 #endif
 377 
 378 #endif
 379 }
 380 
 381 
 382 void stubRoutines_init1() { StubRoutines::initialize1(); }
 383 void stubRoutines_init2() { StubRoutines::initialize2(); }
 384 
 385 //
 386 // Default versions of arraycopy functions
 387 //
 388 
 389 static void gen_arraycopy_barrier_pre(oop* dest, size_t count, bool dest_uninitialized) {
 390     assert(count != 0, "count should be non-zero");
 391     assert(count <= (size_t)max_intx, "count too large");
 392     BarrierSet* bs = Universe::heap()->barrier_set();
 393     assert(bs->has_write_ref_array_pre_opt(), "Must have pre-barrier opt");
 394     bs->write_ref_array_pre(dest, (int)count, dest_uninitialized);
 395 }
 396 
 397 static void gen_arraycopy_barrier(oop* dest, size_t count) {
 398     assert(count != 0, "count should be non-zero");
 399     BarrierSet* bs = Universe::heap()->barrier_set();
 400     assert(bs->has_write_ref_array_opt(), "Barrier set must have ref array opt");
 401     bs->write_ref_array((HeapWord*)dest, count);
 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   gen_arraycopy_barrier_pre(dest, count, /*dest_uninitialized*/false);
 438   Copy::conjoint_oops_atomic(src, dest, count);
 439   gen_arraycopy_barrier(dest, count);
 440 JRT_END
 441 
 442 JRT_LEAF(void, StubRoutines::oop_copy_uninit(oop* src, oop* dest, size_t count))
 443 #ifndef PRODUCT
 444   SharedRuntime::_oop_array_copy_ctr++;        // Slow-path oop array copy
 445 #endif // !PRODUCT
 446   assert(count != 0, "count should be non-zero");
 447   gen_arraycopy_barrier_pre(dest, count, /*dest_uninitialized*/true);
 448   Copy::conjoint_oops_atomic(src, dest, count);
 449   gen_arraycopy_barrier(dest, count);
 450 JRT_END
 451 
 452 JRT_LEAF(void, StubRoutines::arrayof_jbyte_copy(HeapWord* src, HeapWord* dest, size_t count))
 453 #ifndef PRODUCT
 454   SharedRuntime::_jbyte_array_copy_ctr++;      // Slow-path byte array copy
 455 #endif // !PRODUCT
 456   Copy::arrayof_conjoint_jbytes(src, dest, count);
 457 JRT_END
 458 
 459 JRT_LEAF(void, StubRoutines::arrayof_jshort_copy(HeapWord* src, HeapWord* dest, size_t count))
 460 #ifndef PRODUCT
 461   SharedRuntime::_jshort_array_copy_ctr++;     // Slow-path short/char array copy
 462 #endif // !PRODUCT
 463   Copy::arrayof_conjoint_jshorts(src, dest, count);
 464 JRT_END
 465 
 466 JRT_LEAF(void, StubRoutines::arrayof_jint_copy(HeapWord* src, HeapWord* dest, size_t count))
 467 #ifndef PRODUCT
 468   SharedRuntime::_jint_array_copy_ctr++;       // Slow-path int/float array copy
 469 #endif // !PRODUCT
 470   Copy::arrayof_conjoint_jints(src, dest, count);
 471 JRT_END
 472 
 473 JRT_LEAF(void, StubRoutines::arrayof_jlong_copy(HeapWord* src, HeapWord* dest, size_t count))
 474 #ifndef PRODUCT
 475   SharedRuntime::_jlong_array_copy_ctr++;       // Slow-path int/float array copy
 476 #endif // !PRODUCT
 477   Copy::arrayof_conjoint_jlongs(src, dest, count);
 478 JRT_END
 479 
 480 JRT_LEAF(void, StubRoutines::arrayof_oop_copy(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*/false);
 486   Copy::arrayof_conjoint_oops(src, dest, count);
 487   gen_arraycopy_barrier((oop *) dest, count);
 488 JRT_END
 489 
 490 JRT_LEAF(void, StubRoutines::arrayof_oop_copy_uninit(HeapWord* src, HeapWord* dest, size_t count))
 491 #ifndef PRODUCT
 492   SharedRuntime::_oop_array_copy_ctr++;        // Slow-path oop array copy
 493 #endif // !PRODUCT
 494   assert(count != 0, "count should be non-zero");
 495   gen_arraycopy_barrier_pre((oop *) dest, count, /*dest_uninitialized*/true);
 496   Copy::arrayof_conjoint_oops(src, dest, count);
 497   gen_arraycopy_barrier((oop *) dest, count);
 498 JRT_END
 499 
 500 address StubRoutines::select_fill_function(BasicType t, bool aligned, const char* &name) {
 501 #define RETURN_STUB(xxx_fill) { \
 502   name = #xxx_fill; \
 503   return StubRoutines::xxx_fill(); }
 504 
 505   switch (t) {
 506   case T_BYTE:
 507   case T_BOOLEAN:
 508     if (!aligned) RETURN_STUB(jbyte_fill);
 509     RETURN_STUB(arrayof_jbyte_fill);
 510   case T_CHAR:
 511   case T_SHORT:
 512     if (!aligned) RETURN_STUB(jshort_fill);
 513     RETURN_STUB(arrayof_jshort_fill);
 514   case T_INT:
 515   case T_FLOAT:
 516     if (!aligned) RETURN_STUB(jint_fill);
 517     RETURN_STUB(arrayof_jint_fill);
 518   case T_DOUBLE:
 519   case T_LONG:
 520   case T_ARRAY:
 521   case T_OBJECT:
 522   case T_NARROWOOP:
 523   case T_NARROWKLASS:
 524   case T_ADDRESS:
 525     // Currently unsupported
 526     return NULL;
 527 
 528   default:
 529     ShouldNotReachHere();
 530     return NULL;
 531   }
 532 
 533 #undef RETURN_STUB
 534 }
 535 
 536 // constants for computing the copy function
 537 enum {
 538   COPYFUNC_UNALIGNED = 0,
 539   COPYFUNC_ALIGNED = 1,                 // src, dest aligned to HeapWordSize
 540   COPYFUNC_CONJOINT = 0,
 541   COPYFUNC_DISJOINT = 2                 // src != dest, or transfer can descend
 542 };
 543 
 544 // Note:  The condition "disjoint" applies also for overlapping copies
 545 // where an descending copy is permitted (i.e., dest_offset <= src_offset).
 546 address
 547 StubRoutines::select_arraycopy_function(BasicType t, bool aligned, bool disjoint, const char* &name, bool dest_uninitialized) {
 548   int selector =
 549     (aligned  ? COPYFUNC_ALIGNED  : COPYFUNC_UNALIGNED) +
 550     (disjoint ? COPYFUNC_DISJOINT : COPYFUNC_CONJOINT);
 551 
 552 #define RETURN_STUB(xxx_arraycopy) { \
 553   name = #xxx_arraycopy; \
 554   return StubRoutines::xxx_arraycopy(); }
 555 
 556 #define RETURN_STUB_PARM(xxx_arraycopy, parm) {           \
 557   name = #xxx_arraycopy; \
 558   return StubRoutines::xxx_arraycopy(parm); }
 559 
 560   switch (t) {
 561   case T_BYTE:
 562   case T_BOOLEAN:
 563     switch (selector) {
 564     case COPYFUNC_CONJOINT | COPYFUNC_UNALIGNED:  RETURN_STUB(jbyte_arraycopy);
 565     case COPYFUNC_CONJOINT | COPYFUNC_ALIGNED:    RETURN_STUB(arrayof_jbyte_arraycopy);
 566     case COPYFUNC_DISJOINT | COPYFUNC_UNALIGNED:  RETURN_STUB(jbyte_disjoint_arraycopy);
 567     case COPYFUNC_DISJOINT | COPYFUNC_ALIGNED:    RETURN_STUB(arrayof_jbyte_disjoint_arraycopy);
 568     }
 569   case T_CHAR:
 570   case T_SHORT:
 571     switch (selector) {
 572     case COPYFUNC_CONJOINT | COPYFUNC_UNALIGNED:  RETURN_STUB(jshort_arraycopy);
 573     case COPYFUNC_CONJOINT | COPYFUNC_ALIGNED:    RETURN_STUB(arrayof_jshort_arraycopy);
 574     case COPYFUNC_DISJOINT | COPYFUNC_UNALIGNED:  RETURN_STUB(jshort_disjoint_arraycopy);
 575     case COPYFUNC_DISJOINT | COPYFUNC_ALIGNED:    RETURN_STUB(arrayof_jshort_disjoint_arraycopy);
 576     }
 577   case T_INT:
 578   case T_FLOAT:
 579     switch (selector) {
 580     case COPYFUNC_CONJOINT | COPYFUNC_UNALIGNED:  RETURN_STUB(jint_arraycopy);
 581     case COPYFUNC_CONJOINT | COPYFUNC_ALIGNED:    RETURN_STUB(arrayof_jint_arraycopy);
 582     case COPYFUNC_DISJOINT | COPYFUNC_UNALIGNED:  RETURN_STUB(jint_disjoint_arraycopy);
 583     case COPYFUNC_DISJOINT | COPYFUNC_ALIGNED:    RETURN_STUB(arrayof_jint_disjoint_arraycopy);
 584     }
 585   case T_DOUBLE:
 586   case T_LONG:
 587     switch (selector) {
 588     case COPYFUNC_CONJOINT | COPYFUNC_UNALIGNED:  RETURN_STUB(jlong_arraycopy);
 589     case COPYFUNC_CONJOINT | COPYFUNC_ALIGNED:    RETURN_STUB(arrayof_jlong_arraycopy);
 590     case COPYFUNC_DISJOINT | COPYFUNC_UNALIGNED:  RETURN_STUB(jlong_disjoint_arraycopy);
 591     case COPYFUNC_DISJOINT | COPYFUNC_ALIGNED:    RETURN_STUB(arrayof_jlong_disjoint_arraycopy);
 592     }
 593   case T_ARRAY:
 594   case T_OBJECT:
 595     switch (selector) {
 596     case COPYFUNC_CONJOINT | COPYFUNC_UNALIGNED:  RETURN_STUB_PARM(oop_arraycopy, dest_uninitialized);
 597     case COPYFUNC_CONJOINT | COPYFUNC_ALIGNED:    RETURN_STUB_PARM(arrayof_oop_arraycopy, dest_uninitialized);
 598     case COPYFUNC_DISJOINT | COPYFUNC_UNALIGNED:  RETURN_STUB_PARM(oop_disjoint_arraycopy, dest_uninitialized);
 599     case COPYFUNC_DISJOINT | COPYFUNC_ALIGNED:    RETURN_STUB_PARM(arrayof_oop_disjoint_arraycopy, dest_uninitialized);
 600     }
 601   default:
 602     ShouldNotReachHere();
 603     return NULL;
 604   }
 605 
 606 #undef RETURN_STUB
 607 #undef RETURN_STUB_PARM
 608 }