1 /*
   2  * Copyright (c) 1997, 2019, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *
  23  */
  24 
  25 #include "precompiled.hpp"
  26 #include "asm/codeBuffer.hpp"
  27 #include "asm/macroAssembler.inline.hpp"
  28 #include "memory/resourceArea.hpp"
  29 #include "oops/access.inline.hpp"
  30 #include "oops/oop.inline.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 UnsafeCopyMemory* UnsafeCopyMemory::_table                      = NULL;
  43 int UnsafeCopyMemory::_table_length                             = 0;
  44 int UnsafeCopyMemory::_table_max_length                         = 0;
  45 address UnsafeCopyMemory::_common_exit_stub_pc                  = NULL;
  46 
  47 // Implementation of StubRoutines - for a description
  48 // of how to extend it, see the header file.
  49 
  50 // Class Variables
  51 
  52 BufferBlob* StubRoutines::_code1                                = NULL;
  53 BufferBlob* StubRoutines::_code2                                = NULL;
  54 
  55 address StubRoutines::_call_stub_return_address                 = NULL;
  56 address StubRoutines::_call_stub_entry                          = NULL;
  57 
  58 address StubRoutines::_catch_exception_entry                    = NULL;
  59 address StubRoutines::_forward_exception_entry                  = NULL;
  60 address StubRoutines::_throw_AbstractMethodError_entry          = NULL;
  61 address StubRoutines::_throw_IncompatibleClassChangeError_entry = NULL;
  62 address StubRoutines::_throw_NullPointerException_at_call_entry = NULL;
  63 address StubRoutines::_throw_StackOverflowError_entry           = NULL;
  64 address StubRoutines::_throw_delayed_StackOverflowError_entry   = NULL;
  65 jint    StubRoutines::_verify_oop_count                         = 0;
  66 address StubRoutines::_verify_oop_subroutine_entry              = NULL;
  67 address StubRoutines::_atomic_xchg_entry                        = NULL;
  68 address StubRoutines::_atomic_xchg_long_entry                   = NULL;
  69 address StubRoutines::_atomic_store_entry                       = NULL;
  70 address StubRoutines::_atomic_cmpxchg_entry                     = NULL;
  71 address StubRoutines::_atomic_cmpxchg_byte_entry                = NULL;
  72 address StubRoutines::_atomic_cmpxchg_long_entry                = NULL;
  73 address StubRoutines::_atomic_add_entry                         = NULL;
  74 address StubRoutines::_atomic_add_long_entry                    = NULL;
  75 address StubRoutines::_fence_entry                              = NULL;
  76 address StubRoutines::_d2i_wrapper                              = NULL;
  77 address StubRoutines::_d2l_wrapper                              = NULL;
  78 
  79 jint    StubRoutines::_fpu_cntrl_wrd_std                        = 0;
  80 jint    StubRoutines::_fpu_cntrl_wrd_24                         = 0;
  81 jint    StubRoutines::_fpu_cntrl_wrd_trunc                      = 0;
  82 jint    StubRoutines::_mxcsr_std                                = 0;
  83 jint    StubRoutines::_fpu_subnormal_bias1[3]                   = { 0, 0, 0 };
  84 jint    StubRoutines::_fpu_subnormal_bias2[3]                   = { 0, 0, 0 };
  85 
  86 // Compiled code entry points default values
  87 // The default functions don't have separate disjoint versions.
  88 address StubRoutines::_jbyte_arraycopy          = CAST_FROM_FN_PTR(address, StubRoutines::jbyte_copy);
  89 address StubRoutines::_jshort_arraycopy         = CAST_FROM_FN_PTR(address, StubRoutines::jshort_copy);
  90 address StubRoutines::_jint_arraycopy           = CAST_FROM_FN_PTR(address, StubRoutines::jint_copy);
  91 address StubRoutines::_jlong_arraycopy          = CAST_FROM_FN_PTR(address, StubRoutines::jlong_copy);
  92 address StubRoutines::_oop_arraycopy            = CAST_FROM_FN_PTR(address, StubRoutines::oop_copy);
  93 address StubRoutines::_oop_arraycopy_uninit     = CAST_FROM_FN_PTR(address, StubRoutines::oop_copy_uninit);
  94 address StubRoutines::_jbyte_disjoint_arraycopy          = CAST_FROM_FN_PTR(address, StubRoutines::jbyte_copy);
  95 address StubRoutines::_jshort_disjoint_arraycopy         = CAST_FROM_FN_PTR(address, StubRoutines::jshort_copy);
  96 address StubRoutines::_jint_disjoint_arraycopy           = CAST_FROM_FN_PTR(address, StubRoutines::jint_copy);
  97 address StubRoutines::_jlong_disjoint_arraycopy          = CAST_FROM_FN_PTR(address, StubRoutines::jlong_copy);
  98 address StubRoutines::_oop_disjoint_arraycopy            = CAST_FROM_FN_PTR(address, StubRoutines::oop_copy);
  99 address StubRoutines::_oop_disjoint_arraycopy_uninit     = CAST_FROM_FN_PTR(address, StubRoutines::oop_copy_uninit);
 100 
 101 address StubRoutines::_arrayof_jbyte_arraycopy  = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_jbyte_copy);
 102 address StubRoutines::_arrayof_jshort_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_jshort_copy);
 103 address StubRoutines::_arrayof_jint_arraycopy   = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_jint_copy);
 104 address StubRoutines::_arrayof_jlong_arraycopy  = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_jlong_copy);
 105 address StubRoutines::_arrayof_oop_arraycopy    = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_oop_copy);
 106 address StubRoutines::_arrayof_oop_arraycopy_uninit      = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_oop_copy_uninit);
 107 address StubRoutines::_arrayof_jbyte_disjoint_arraycopy  = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_jbyte_copy);
 108 address StubRoutines::_arrayof_jshort_disjoint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_jshort_copy);
 109 address StubRoutines::_arrayof_jint_disjoint_arraycopy   = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_jint_copy);
 110 address StubRoutines::_arrayof_jlong_disjoint_arraycopy  = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_jlong_copy);
 111 address StubRoutines::_arrayof_oop_disjoint_arraycopy    = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_oop_copy);
 112 address StubRoutines::_arrayof_oop_disjoint_arraycopy_uninit  = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_oop_copy_uninit);
 113 
 114 address StubRoutines::_zero_aligned_words = CAST_FROM_FN_PTR(address, Copy::zero_to_words);
 115 
 116 address StubRoutines::_data_cache_writeback              = NULL;
 117 address StubRoutines::_data_cache_writeback_sync         = NULL;
 118 
 119 address StubRoutines::_checkcast_arraycopy               = NULL;
 120 address StubRoutines::_checkcast_arraycopy_uninit        = NULL;
 121 address StubRoutines::_unsafe_arraycopy                  = NULL;
 122 address StubRoutines::_generic_arraycopy                 = NULL;
 123 
 124 address StubRoutines::_jbyte_fill;
 125 address StubRoutines::_jshort_fill;
 126 address StubRoutines::_jint_fill;
 127 address StubRoutines::_arrayof_jbyte_fill;
 128 address StubRoutines::_arrayof_jshort_fill;
 129 address StubRoutines::_arrayof_jint_fill;
 130 
 131 address StubRoutines::_aescrypt_encryptBlock               = NULL;
 132 address StubRoutines::_aescrypt_decryptBlock               = NULL;
 133 address StubRoutines::_cipherBlockChaining_encryptAESCrypt = NULL;
 134 address StubRoutines::_cipherBlockChaining_decryptAESCrypt = NULL;
 135 address StubRoutines::_electronicCodeBook_encryptAESCrypt  = NULL;
 136 address StubRoutines::_electronicCodeBook_decryptAESCrypt  = NULL;
 137 address StubRoutines::_counterMode_AESCrypt                = NULL;
 138 address StubRoutines::_ghash_processBlocks                 = NULL;
 139 address StubRoutines::_base64_encodeBlock                  = NULL;
 140 
 141 address StubRoutines::_sha1_implCompress     = NULL;
 142 address StubRoutines::_sha1_implCompressMB   = NULL;
 143 address StubRoutines::_sha256_implCompress   = NULL;
 144 address StubRoutines::_sha256_implCompressMB = NULL;
 145 address StubRoutines::_sha512_implCompress   = NULL;
 146 address StubRoutines::_sha512_implCompressMB = NULL;
 147 
 148 address StubRoutines::_updateBytesCRC32 = NULL;
 149 address StubRoutines::_crc_table_adr =    NULL;
 150 
 151 address StubRoutines::_crc32c_table_addr = NULL;
 152 address StubRoutines::_updateBytesCRC32C = NULL;
 153 address StubRoutines::_updateBytesAdler32 = NULL;
 154 
 155 address StubRoutines::_multiplyToLen = NULL;
 156 address StubRoutines::_squareToLen = NULL;
 157 address StubRoutines::_mulAdd = NULL;
 158 address StubRoutines::_montgomeryMultiply = NULL;
 159 address StubRoutines::_montgomerySquare = NULL;


 160 
 161 address StubRoutines::_vectorizedMismatch = NULL;
 162 
 163 address StubRoutines::_dexp = NULL;
 164 address StubRoutines::_dlog = NULL;
 165 address StubRoutines::_dlog10 = NULL;
 166 address StubRoutines::_dpow = NULL;
 167 address StubRoutines::_dsin = NULL;
 168 address StubRoutines::_dcos = NULL;
 169 address StubRoutines::_dlibm_sin_cos_huge = NULL;
 170 address StubRoutines::_dlibm_reduce_pi04l = NULL;
 171 address StubRoutines::_dlibm_tan_cot_huge = NULL;
 172 address StubRoutines::_dtan = NULL;
 173 
 174 address StubRoutines::_safefetch32_entry                 = NULL;
 175 address StubRoutines::_safefetch32_fault_pc              = NULL;
 176 address StubRoutines::_safefetch32_continuation_pc       = NULL;
 177 address StubRoutines::_safefetchN_entry                  = NULL;
 178 address StubRoutines::_safefetchN_fault_pc               = NULL;
 179 address StubRoutines::_safefetchN_continuation_pc        = NULL;
 180 
 181 // Initialization
 182 //
 183 // Note: to break cycle with universe initialization, stubs are generated in two phases.
 184 // The first one generates stubs needed during universe init (e.g., _handle_must_compile_first_entry).
 185 // The second phase includes all other stubs (which may depend on universe being initialized.)
 186 
 187 extern void StubGenerator_generate(CodeBuffer* code, bool all); // only interface to generators
 188 
 189 void UnsafeCopyMemory::create_table(int max_size) {
 190   UnsafeCopyMemory::_table = new UnsafeCopyMemory[max_size];
 191   UnsafeCopyMemory::_table_max_length = max_size;
 192 }
 193 
 194 bool UnsafeCopyMemory::contains_pc(address pc) {
 195   for (int i = 0; i < UnsafeCopyMemory::_table_length; i++) {
 196     UnsafeCopyMemory* entry = &UnsafeCopyMemory::_table[i];
 197     if (pc >= entry->start_pc() && pc < entry->end_pc()) {
 198       return true;
 199     }
 200   }
 201   return false;
 202 }
 203 
 204 address UnsafeCopyMemory::page_error_continue_pc(address pc) {
 205   for (int i = 0; i < UnsafeCopyMemory::_table_length; i++) {
 206     UnsafeCopyMemory* entry = &UnsafeCopyMemory::_table[i];
 207     if (pc >= entry->start_pc() && pc < entry->end_pc()) {
 208       return entry->error_exit_pc();
 209     }
 210   }
 211   return NULL;
 212 }
 213 
 214 void StubRoutines::initialize1() {
 215   if (_code1 == NULL) {
 216     ResourceMark rm;
 217     TraceTime timer("StubRoutines generation 1", TRACETIME_LOG(Info, startuptime));
 218     _code1 = BufferBlob::create("StubRoutines (1)", code_size1);
 219     if (_code1 == NULL) {
 220       vm_exit_out_of_memory(code_size1, OOM_MALLOC_ERROR, "CodeCache: no room for StubRoutines (1)");
 221     }
 222     CodeBuffer buffer(_code1);
 223     StubGenerator_generate(&buffer, false);
 224     // When new stubs added we need to make sure there is some space left
 225     // to catch situation when we should increase size again.
 226     assert(code_size1 == 0 || buffer.insts_remaining() > 200, "increase code_size1");
 227   }
 228 }
 229 
 230 
 231 #ifdef ASSERT
 232 typedef void (*arraycopy_fn)(address src, address dst, int count);
 233 
 234 // simple tests of generated arraycopy functions
 235 static void test_arraycopy_func(address func, int alignment) {
 236   int v = 0xcc;
 237   int v2 = 0x11;
 238   jlong lbuffer[8];
 239   jlong lbuffer2[8];
 240   address fbuffer  = (address) lbuffer;
 241   address fbuffer2 = (address) lbuffer2;
 242   unsigned int i;
 243   for (i = 0; i < sizeof(lbuffer); i++) {
 244     fbuffer[i] = v; fbuffer2[i] = v2;
 245   }
 246   // C++ does not guarantee jlong[] array alignment to 8 bytes.
 247   // Use middle of array to check that memory before it is not modified.
 248   address buffer  = align_up((address)&lbuffer[4], BytesPerLong);
 249   address buffer2 = align_up((address)&lbuffer2[4], BytesPerLong);
 250   // do an aligned copy
 251   ((arraycopy_fn)func)(buffer, buffer2, 0);
 252   for (i = 0; i < sizeof(lbuffer); i++) {
 253     assert(fbuffer[i] == v && fbuffer2[i] == v2, "shouldn't have copied anything");
 254   }
 255   // adjust destination alignment
 256   ((arraycopy_fn)func)(buffer, buffer2 + alignment, 0);
 257   for (i = 0; i < sizeof(lbuffer); i++) {
 258     assert(fbuffer[i] == v && fbuffer2[i] == v2, "shouldn't have copied anything");
 259   }
 260   // adjust source alignment
 261   ((arraycopy_fn)func)(buffer + alignment, buffer2, 0);
 262   for (i = 0; i < sizeof(lbuffer); i++) {
 263     assert(fbuffer[i] == v && fbuffer2[i] == v2, "shouldn't have copied anything");
 264   }
 265 }
 266 
 267 // simple test for SafeFetch32
 268 static void test_safefetch32() {
 269   if (CanUseSafeFetch32()) {
 270     int dummy = 17;
 271     int* const p_invalid = (int*) VMError::get_segfault_address();
 272     int* const p_valid = &dummy;
 273     int result_invalid = SafeFetch32(p_invalid, 0xABC);
 274     assert(result_invalid == 0xABC, "SafeFetch32 error");
 275     int result_valid = SafeFetch32(p_valid, 0xABC);
 276     assert(result_valid == 17, "SafeFetch32 error");
 277   }
 278 }
 279 
 280 // simple test for SafeFetchN
 281 static void test_safefetchN() {
 282   if (CanUseSafeFetchN()) {
 283 #ifdef _LP64
 284     const intptr_t v1 = UCONST64(0xABCD00000000ABCD);
 285     const intptr_t v2 = UCONST64(0xDEFD00000000DEFD);
 286 #else
 287     const intptr_t v1 = 0xABCDABCD;
 288     const intptr_t v2 = 0xDEFDDEFD;
 289 #endif
 290     intptr_t dummy = v1;
 291     intptr_t* const p_invalid = (intptr_t*) VMError::get_segfault_address();
 292     intptr_t* const p_valid = &dummy;
 293     intptr_t result_invalid = SafeFetchN(p_invalid, v2);
 294     assert(result_invalid == v2, "SafeFetchN error");
 295     intptr_t result_valid = SafeFetchN(p_valid, v2);
 296     assert(result_valid == v1, "SafeFetchN error");
 297   }
 298 }
 299 #endif
 300 
 301 void StubRoutines::initialize2() {
 302   if (_code2 == NULL) {
 303     ResourceMark rm;
 304     TraceTime timer("StubRoutines generation 2", TRACETIME_LOG(Info, startuptime));
 305     _code2 = BufferBlob::create("StubRoutines (2)", code_size2);
 306     if (_code2 == NULL) {
 307       vm_exit_out_of_memory(code_size2, OOM_MALLOC_ERROR, "CodeCache: no room for StubRoutines (2)");
 308     }
 309     CodeBuffer buffer(_code2);
 310     StubGenerator_generate(&buffer, true);
 311     // When new stubs added we need to make sure there is some space left
 312     // to catch situation when we should increase size again.
 313     assert(code_size2 == 0 || buffer.insts_remaining() > 200, "increase code_size2");
 314   }
 315 
 316 #ifdef ASSERT
 317 
 318 #define TEST_ARRAYCOPY(type)                                                    \
 319   test_arraycopy_func(          type##_arraycopy(),          sizeof(type));     \
 320   test_arraycopy_func(          type##_disjoint_arraycopy(), sizeof(type));     \
 321   test_arraycopy_func(arrayof_##type##_arraycopy(),          sizeof(HeapWord)); \
 322   test_arraycopy_func(arrayof_##type##_disjoint_arraycopy(), sizeof(HeapWord))
 323 
 324   // Make sure all the arraycopy stubs properly handle zero count
 325   TEST_ARRAYCOPY(jbyte);
 326   TEST_ARRAYCOPY(jshort);
 327   TEST_ARRAYCOPY(jint);
 328   TEST_ARRAYCOPY(jlong);
 329 
 330 #undef TEST_ARRAYCOPY
 331 
 332 #define TEST_FILL(type)                                                                      \
 333   if (_##type##_fill != NULL) {                                                              \
 334     union {                                                                                  \
 335       double d;                                                                              \
 336       type body[96];                                                                         \
 337     } s;                                                                                     \
 338                                                                                              \
 339     int v = 32;                                                                              \
 340     for (int offset = -2; offset <= 2; offset++) {                                           \
 341       for (int i = 0; i < 96; i++) {                                                         \
 342         s.body[i] = 1;                                                                       \
 343       }                                                                                      \
 344       type* start = s.body + 8 + offset;                                                     \
 345       for (int aligned = 0; aligned < 2; aligned++) {                                        \
 346         if (aligned) {                                                                       \
 347           if (((intptr_t)start) % HeapWordSize == 0) {                                       \
 348             ((void (*)(type*, int, int))StubRoutines::_arrayof_##type##_fill)(start, v, 80); \
 349           } else {                                                                           \
 350             continue;                                                                        \
 351           }                                                                                  \
 352         } else {                                                                             \
 353           ((void (*)(type*, int, int))StubRoutines::_##type##_fill)(start, v, 80);           \
 354         }                                                                                    \
 355         for (int i = 0; i < 96; i++) {                                                       \
 356           if (i < (8 + offset) || i >= (88 + offset)) {                                      \
 357             assert(s.body[i] == 1, "what?");                                                 \
 358           } else {                                                                           \
 359             assert(s.body[i] == 32, "what?");                                                \
 360           }                                                                                  \
 361         }                                                                                    \
 362       }                                                                                      \
 363     }                                                                                        \
 364   }                                                                                          \
 365 
 366   TEST_FILL(jbyte);
 367   TEST_FILL(jshort);
 368   TEST_FILL(jint);
 369 
 370 #undef TEST_FILL
 371 
 372 #define TEST_COPYRTN(type) \
 373   test_arraycopy_func(CAST_FROM_FN_PTR(address, Copy::conjoint_##type##s_atomic),  sizeof(type)); \
 374   test_arraycopy_func(CAST_FROM_FN_PTR(address, Copy::arrayof_conjoint_##type##s), (int)MAX2(sizeof(HeapWord), sizeof(type)))
 375 
 376   // Make sure all the copy runtime routines properly handle zero count
 377   TEST_COPYRTN(jbyte);
 378   TEST_COPYRTN(jshort);
 379   TEST_COPYRTN(jint);
 380   TEST_COPYRTN(jlong);
 381 
 382 #undef TEST_COPYRTN
 383 
 384   test_arraycopy_func(CAST_FROM_FN_PTR(address, Copy::conjoint_words), sizeof(HeapWord));
 385   test_arraycopy_func(CAST_FROM_FN_PTR(address, Copy::disjoint_words), sizeof(HeapWord));
 386   test_arraycopy_func(CAST_FROM_FN_PTR(address, Copy::disjoint_words_atomic), sizeof(HeapWord));
 387   // Aligned to BytesPerLong
 388   test_arraycopy_func(CAST_FROM_FN_PTR(address, Copy::aligned_conjoint_words), sizeof(jlong));
 389   test_arraycopy_func(CAST_FROM_FN_PTR(address, Copy::aligned_disjoint_words), sizeof(jlong));
 390 
 391   // test safefetch routines
 392   // Not on Windows 32bit until 8074860 is fixed
 393 #if ! (defined(_WIN32) && defined(_M_IX86))
 394   test_safefetch32();
 395   test_safefetchN();
 396 #endif
 397 
 398 #endif
 399 }
 400 
 401 
 402 void stubRoutines_init1() { StubRoutines::initialize1(); }
 403 void stubRoutines_init2() { StubRoutines::initialize2(); }
 404 
 405 //
 406 // Default versions of arraycopy functions
 407 //
 408 
 409 JRT_LEAF(void, StubRoutines::jbyte_copy(jbyte* src, jbyte* dest, size_t count))
 410 #ifndef PRODUCT
 411   SharedRuntime::_jbyte_array_copy_ctr++;      // Slow-path byte array copy
 412 #endif // !PRODUCT
 413   Copy::conjoint_jbytes_atomic(src, dest, count);
 414 JRT_END
 415 
 416 JRT_LEAF(void, StubRoutines::jshort_copy(jshort* src, jshort* dest, size_t count))
 417 #ifndef PRODUCT
 418   SharedRuntime::_jshort_array_copy_ctr++;     // Slow-path short/char array copy
 419 #endif // !PRODUCT
 420   Copy::conjoint_jshorts_atomic(src, dest, count);
 421 JRT_END
 422 
 423 JRT_LEAF(void, StubRoutines::jint_copy(jint* src, jint* dest, size_t count))
 424 #ifndef PRODUCT
 425   SharedRuntime::_jint_array_copy_ctr++;       // Slow-path int/float array copy
 426 #endif // !PRODUCT
 427   Copy::conjoint_jints_atomic(src, dest, count);
 428 JRT_END
 429 
 430 JRT_LEAF(void, StubRoutines::jlong_copy(jlong* src, jlong* dest, size_t count))
 431 #ifndef PRODUCT
 432   SharedRuntime::_jlong_array_copy_ctr++;      // Slow-path long/double array copy
 433 #endif // !PRODUCT
 434   Copy::conjoint_jlongs_atomic(src, dest, count);
 435 JRT_END
 436 
 437 JRT_LEAF(void, StubRoutines::oop_copy(oop* src, oop* dest, size_t count))
 438 #ifndef PRODUCT
 439   SharedRuntime::_oop_array_copy_ctr++;        // Slow-path oop array copy
 440 #endif // !PRODUCT
 441   assert(count != 0, "count should be non-zero");
 442   ArrayAccess<>::oop_arraycopy_raw((HeapWord*)src, (HeapWord*)dest, count);
 443 JRT_END
 444 
 445 JRT_LEAF(void, StubRoutines::oop_copy_uninit(oop* src, oop* dest, size_t count))
 446 #ifndef PRODUCT
 447   SharedRuntime::_oop_array_copy_ctr++;        // Slow-path oop array copy
 448 #endif // !PRODUCT
 449   assert(count != 0, "count should be non-zero");
 450   ArrayAccess<IS_DEST_UNINITIALIZED>::oop_arraycopy_raw((HeapWord*)src, (HeapWord*)dest, count);
 451 JRT_END
 452 
 453 JRT_LEAF(void, StubRoutines::arrayof_jbyte_copy(HeapWord* src, HeapWord* dest, size_t count))
 454 #ifndef PRODUCT
 455   SharedRuntime::_jbyte_array_copy_ctr++;      // Slow-path byte array copy
 456 #endif // !PRODUCT
 457   Copy::arrayof_conjoint_jbytes(src, dest, count);
 458 JRT_END
 459 
 460 JRT_LEAF(void, StubRoutines::arrayof_jshort_copy(HeapWord* src, HeapWord* dest, size_t count))
 461 #ifndef PRODUCT
 462   SharedRuntime::_jshort_array_copy_ctr++;     // Slow-path short/char array copy
 463 #endif // !PRODUCT
 464   Copy::arrayof_conjoint_jshorts(src, dest, count);
 465 JRT_END
 466 
 467 JRT_LEAF(void, StubRoutines::arrayof_jint_copy(HeapWord* src, HeapWord* dest, size_t count))
 468 #ifndef PRODUCT
 469   SharedRuntime::_jint_array_copy_ctr++;       // Slow-path int/float array copy
 470 #endif // !PRODUCT
 471   Copy::arrayof_conjoint_jints(src, dest, count);
 472 JRT_END
 473 
 474 JRT_LEAF(void, StubRoutines::arrayof_jlong_copy(HeapWord* src, HeapWord* dest, size_t count))
 475 #ifndef PRODUCT
 476   SharedRuntime::_jlong_array_copy_ctr++;       // Slow-path int/float array copy
 477 #endif // !PRODUCT
 478   Copy::arrayof_conjoint_jlongs(src, dest, count);
 479 JRT_END
 480 
 481 JRT_LEAF(void, StubRoutines::arrayof_oop_copy(HeapWord* src, HeapWord* dest, size_t count))
 482 #ifndef PRODUCT
 483   SharedRuntime::_oop_array_copy_ctr++;        // Slow-path oop array copy
 484 #endif // !PRODUCT
 485   assert(count != 0, "count should be non-zero");
 486   ArrayAccess<ARRAYCOPY_ARRAYOF>::oop_arraycopy_raw(src, dest, count);
 487 JRT_END
 488 
 489 JRT_LEAF(void, StubRoutines::arrayof_oop_copy_uninit(HeapWord* src, HeapWord* dest, size_t count))
 490 #ifndef PRODUCT
 491   SharedRuntime::_oop_array_copy_ctr++;        // Slow-path oop array copy
 492 #endif // !PRODUCT
 493   assert(count != 0, "count should be non-zero");
 494   ArrayAccess<ARRAYCOPY_ARRAYOF | IS_DEST_UNINITIALIZED>::oop_arraycopy_raw(src, dest, count);
 495 JRT_END
 496 
 497 address StubRoutines::select_fill_function(BasicType t, bool aligned, const char* &name) {
 498 #define RETURN_STUB(xxx_fill) { \
 499   name = #xxx_fill; \
 500   return StubRoutines::xxx_fill(); }
 501 
 502   switch (t) {
 503   case T_BYTE:
 504   case T_BOOLEAN:
 505     if (!aligned) RETURN_STUB(jbyte_fill);
 506     RETURN_STUB(arrayof_jbyte_fill);
 507   case T_CHAR:
 508   case T_SHORT:
 509     if (!aligned) RETURN_STUB(jshort_fill);
 510     RETURN_STUB(arrayof_jshort_fill);
 511   case T_INT:
 512   case T_FLOAT:
 513     if (!aligned) RETURN_STUB(jint_fill);
 514     RETURN_STUB(arrayof_jint_fill);
 515   case T_DOUBLE:
 516   case T_LONG:
 517   case T_ARRAY:
 518   case T_OBJECT:
 519   case T_NARROWOOP:
 520   case T_NARROWKLASS:
 521   case T_ADDRESS:
 522     // Currently unsupported
 523     return NULL;
 524 
 525   default:
 526     ShouldNotReachHere();
 527     return NULL;
 528   }
 529 
 530 #undef RETURN_STUB
 531 }
 532 
 533 // constants for computing the copy function
 534 enum {
 535   COPYFUNC_UNALIGNED = 0,
 536   COPYFUNC_ALIGNED = 1,                 // src, dest aligned to HeapWordSize
 537   COPYFUNC_CONJOINT = 0,
 538   COPYFUNC_DISJOINT = 2                 // src != dest, or transfer can descend
 539 };
 540 
 541 // Note:  The condition "disjoint" applies also for overlapping copies
 542 // where an descending copy is permitted (i.e., dest_offset <= src_offset).
 543 address
 544 StubRoutines::select_arraycopy_function(BasicType t, bool aligned, bool disjoint, const char* &name, bool dest_uninitialized) {
 545   int selector =
 546     (aligned  ? COPYFUNC_ALIGNED  : COPYFUNC_UNALIGNED) +
 547     (disjoint ? COPYFUNC_DISJOINT : COPYFUNC_CONJOINT);
 548 
 549 #define RETURN_STUB(xxx_arraycopy) { \
 550   name = #xxx_arraycopy; \
 551   return StubRoutines::xxx_arraycopy(); }
 552 
 553 #define RETURN_STUB_PARM(xxx_arraycopy, parm) {           \
 554   name = #xxx_arraycopy; \
 555   return StubRoutines::xxx_arraycopy(parm); }
 556 
 557   switch (t) {
 558   case T_BYTE:
 559   case T_BOOLEAN:
 560     switch (selector) {
 561     case COPYFUNC_CONJOINT | COPYFUNC_UNALIGNED:  RETURN_STUB(jbyte_arraycopy);
 562     case COPYFUNC_CONJOINT | COPYFUNC_ALIGNED:    RETURN_STUB(arrayof_jbyte_arraycopy);
 563     case COPYFUNC_DISJOINT | COPYFUNC_UNALIGNED:  RETURN_STUB(jbyte_disjoint_arraycopy);
 564     case COPYFUNC_DISJOINT | COPYFUNC_ALIGNED:    RETURN_STUB(arrayof_jbyte_disjoint_arraycopy);
 565     }
 566   case T_CHAR:
 567   case T_SHORT:
 568     switch (selector) {
 569     case COPYFUNC_CONJOINT | COPYFUNC_UNALIGNED:  RETURN_STUB(jshort_arraycopy);
 570     case COPYFUNC_CONJOINT | COPYFUNC_ALIGNED:    RETURN_STUB(arrayof_jshort_arraycopy);
 571     case COPYFUNC_DISJOINT | COPYFUNC_UNALIGNED:  RETURN_STUB(jshort_disjoint_arraycopy);
 572     case COPYFUNC_DISJOINT | COPYFUNC_ALIGNED:    RETURN_STUB(arrayof_jshort_disjoint_arraycopy);
 573     }
 574   case T_INT:
 575   case T_FLOAT:
 576     switch (selector) {
 577     case COPYFUNC_CONJOINT | COPYFUNC_UNALIGNED:  RETURN_STUB(jint_arraycopy);
 578     case COPYFUNC_CONJOINT | COPYFUNC_ALIGNED:    RETURN_STUB(arrayof_jint_arraycopy);
 579     case COPYFUNC_DISJOINT | COPYFUNC_UNALIGNED:  RETURN_STUB(jint_disjoint_arraycopy);
 580     case COPYFUNC_DISJOINT | COPYFUNC_ALIGNED:    RETURN_STUB(arrayof_jint_disjoint_arraycopy);
 581     }
 582   case T_DOUBLE:
 583   case T_LONG:
 584     switch (selector) {
 585     case COPYFUNC_CONJOINT | COPYFUNC_UNALIGNED:  RETURN_STUB(jlong_arraycopy);
 586     case COPYFUNC_CONJOINT | COPYFUNC_ALIGNED:    RETURN_STUB(arrayof_jlong_arraycopy);
 587     case COPYFUNC_DISJOINT | COPYFUNC_UNALIGNED:  RETURN_STUB(jlong_disjoint_arraycopy);
 588     case COPYFUNC_DISJOINT | COPYFUNC_ALIGNED:    RETURN_STUB(arrayof_jlong_disjoint_arraycopy);
 589     }
 590   case T_ARRAY:
 591   case T_OBJECT:
 592     switch (selector) {
 593     case COPYFUNC_CONJOINT | COPYFUNC_UNALIGNED:  RETURN_STUB_PARM(oop_arraycopy, dest_uninitialized);
 594     case COPYFUNC_CONJOINT | COPYFUNC_ALIGNED:    RETURN_STUB_PARM(arrayof_oop_arraycopy, dest_uninitialized);
 595     case COPYFUNC_DISJOINT | COPYFUNC_UNALIGNED:  RETURN_STUB_PARM(oop_disjoint_arraycopy, dest_uninitialized);
 596     case COPYFUNC_DISJOINT | COPYFUNC_ALIGNED:    RETURN_STUB_PARM(arrayof_oop_disjoint_arraycopy, dest_uninitialized);
 597     }
 598   default:
 599     ShouldNotReachHere();
 600     return NULL;
 601   }
 602 
 603 #undef RETURN_STUB
 604 #undef RETURN_STUB_PARM
 605 }
 606 
 607 UnsafeCopyMemoryMark::UnsafeCopyMemoryMark(StubCodeGenerator* cgen, bool add_entry, bool continue_at_scope_end, address error_exit_pc) {
 608   _cgen = cgen;
 609   _ucm_entry = NULL;
 610   if (add_entry) {
 611     address err_exit_pc = NULL;
 612     if (!continue_at_scope_end) {
 613       err_exit_pc = error_exit_pc != NULL ? error_exit_pc : UnsafeCopyMemory::common_exit_stub_pc();
 614     }
 615     assert(err_exit_pc != NULL || continue_at_scope_end, "error exit not set");
 616     _ucm_entry = UnsafeCopyMemory::add_to_table(_cgen->assembler()->pc(), NULL, err_exit_pc);
 617   }
 618 }
 619 
 620 UnsafeCopyMemoryMark::~UnsafeCopyMemoryMark() {
 621   if (_ucm_entry != NULL) {
 622     _ucm_entry->set_end_pc(_cgen->assembler()->pc());
 623     if (_ucm_entry->error_exit_pc() == NULL) {
 624       _ucm_entry->set_error_exit_pc(_cgen->assembler()->pc());
 625     }
 626   }
 627 }
--- EOF ---