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 #ifndef SHARE_VM_RUNTIME_STUBROUTINES_HPP 26 #define SHARE_VM_RUNTIME_STUBROUTINES_HPP 27 28 #include "code/codeBlob.hpp" 29 #include "memory/allocation.hpp" 30 #include "runtime/frame.hpp" 31 #include "runtime/mutexLocker.hpp" 32 #include "runtime/stubCodeGenerator.hpp" 33 #include "utilities/top.hpp" 34 35 // StubRoutines provides entry points to assembly routines used by 36 // compiled code and the run-time system. Platform-specific entry 37 // points are defined in the platform-specific inner class. 38 // 39 // Class scheme: 40 // 41 // platform-independent platform-dependent 42 // 43 // stubRoutines.hpp <-- included -- stubRoutines_<arch>.hpp 44 // ^ ^ 45 // | | 46 // implements implements 47 // | | 48 // | | 49 // stubRoutines.cpp stubRoutines_<arch>.cpp 50 // stubRoutines_<os_family>.cpp stubGenerator_<arch>.cpp 51 // stubRoutines_<os_arch>.cpp 52 // 53 // Note 1: The important thing is a clean decoupling between stub 54 // entry points (interfacing to the whole vm; i.e., 1-to-n 55 // relationship) and stub generators (interfacing only to 56 // the entry points implementation; i.e., 1-to-1 relationship). 57 // This significantly simplifies changes in the generator 58 // structure since the rest of the vm is not affected. 59 // 60 // Note 2: stubGenerator_<arch>.cpp contains a minimal portion of 61 // machine-independent code; namely the generator calls of 62 // the generator functions that are used platform-independently. 63 // However, it comes with the advantage of having a 1-file 64 // implementation of the generator. It should be fairly easy 65 // to change, should it become a problem later. 66 // 67 // Scheme for adding a new entry point: 68 // 69 // 1. determine if it's a platform-dependent or independent entry point 70 // a) if platform independent: make subsequent changes in the independent files 71 // b) if platform dependent: make subsequent changes in the dependent files 72 // 2. add a private instance variable holding the entry point address 73 // 3. add a public accessor function to the instance variable 74 // 4. implement the corresponding generator function in the platform-dependent 75 // stubGenerator_<arch>.cpp file and call the function in generate_all() of that file 76 77 78 class StubRoutines: AllStatic { 79 80 public: 81 enum platform_independent_constants { 82 max_size_of_parameters = 256 // max. parameter size supported by megamorphic lookups 83 }; 84 85 // Dependencies 86 friend class StubGenerator; 87 #if defined STUBROUTINES_MD_HPP 88 # include STUBROUTINES_MD_HPP 89 #elif defined TARGET_ARCH_MODEL_x86_32 90 # include "stubRoutines_x86_32.hpp" 91 #elif defined TARGET_ARCH_MODEL_x86_64 92 # include "stubRoutines_x86_64.hpp" 93 #elif defined TARGET_ARCH_MODEL_sparc 94 # include "stubRoutines_sparc.hpp" 95 #elif defined TARGET_ARCH_MODEL_zero 96 # include "stubRoutines_zero.hpp" 97 #elif defined TARGET_ARCH_MODEL_ppc_64 98 # include "stubRoutines_ppc_64.hpp" 99 #elif defined TARGET_ARCH_MODEL_aarch64 100 # include "stubRoutines_aarch64.hpp" 101 #endif 102 103 static jint _verify_oop_count; 104 static address _verify_oop_subroutine_entry; 105 106 static address _call_stub_return_address; // the return PC, when returning to a call stub 107 static address _call_stub_entry; 108 static address _forward_exception_entry; 109 static address _catch_exception_entry; 110 static address _throw_AbstractMethodError_entry; 111 static address _throw_IncompatibleClassChangeError_entry; 112 static address _throw_NullPointerException_at_call_entry; 113 static address _throw_StackOverflowError_entry; 114 static address _handler_for_unsafe_access_entry; 115 116 static address _atomic_xchg_entry; 117 static address _atomic_xchg_ptr_entry; 118 static address _atomic_store_entry; 119 static address _atomic_store_ptr_entry; 120 static address _atomic_cmpxchg_entry; 121 static address _atomic_cmpxchg_ptr_entry; 122 static address _atomic_cmpxchg_byte_entry; 123 static address _atomic_cmpxchg_long_entry; 124 static address _atomic_add_entry; 125 static address _atomic_add_ptr_entry; 126 static address _fence_entry; 127 static address _d2i_wrapper; 128 static address _d2l_wrapper; 129 130 static jint _fpu_cntrl_wrd_std; 131 static jint _fpu_cntrl_wrd_24; 132 static jint _fpu_cntrl_wrd_64; 133 static jint _fpu_cntrl_wrd_trunc; 134 static jint _mxcsr_std; 135 static jint _fpu_subnormal_bias1[3]; 136 static jint _fpu_subnormal_bias2[3]; 137 138 static BufferBlob* _code1; // code buffer for initial routines 139 static BufferBlob* _code2; // code buffer for all other routines 140 141 // Leaf routines which implement arraycopy and their addresses 142 // arraycopy operands aligned on element type boundary 143 static address _jbyte_arraycopy; 144 static address _jshort_arraycopy; 145 static address _jint_arraycopy; 146 static address _jlong_arraycopy; 147 static address _oop_arraycopy, _oop_arraycopy_uninit; 148 static address _jbyte_disjoint_arraycopy; 149 static address _jshort_disjoint_arraycopy; 150 static address _jint_disjoint_arraycopy; 151 static address _jlong_disjoint_arraycopy; 152 static address _oop_disjoint_arraycopy, _oop_disjoint_arraycopy_uninit; 153 154 // arraycopy operands aligned on zero'th element boundary 155 // These are identical to the ones aligned aligned on an 156 // element type boundary, except that they assume that both 157 // source and destination are HeapWord aligned. 158 static address _arrayof_jbyte_arraycopy; 159 static address _arrayof_jshort_arraycopy; 160 static address _arrayof_jint_arraycopy; 161 static address _arrayof_jlong_arraycopy; 162 static address _arrayof_oop_arraycopy, _arrayof_oop_arraycopy_uninit; 163 static address _arrayof_jbyte_disjoint_arraycopy; 164 static address _arrayof_jshort_disjoint_arraycopy; 165 static address _arrayof_jint_disjoint_arraycopy; 166 static address _arrayof_jlong_disjoint_arraycopy; 167 static address _arrayof_oop_disjoint_arraycopy, _arrayof_oop_disjoint_arraycopy_uninit; 168 169 // these are recommended but optional: 170 static address _checkcast_arraycopy, _checkcast_arraycopy_uninit; 171 static address _unsafe_arraycopy; 172 static address _generic_arraycopy; 173 174 static address _jbyte_fill; 175 static address _jshort_fill; 176 static address _jint_fill; 177 static address _arrayof_jbyte_fill; 178 static address _arrayof_jshort_fill; 179 static address _arrayof_jint_fill; 180 181 // zero heap space aligned to jlong (8 bytes) 182 static address _zero_aligned_words; 183 184 static address _aescrypt_encryptBlock; 185 static address _aescrypt_decryptBlock; 186 static address _cipherBlockChaining_encryptAESCrypt; 187 static address _cipherBlockChaining_decryptAESCrypt; 188 static address _ghash_processBlocks; 189 190 static address _sha1_implCompress; 191 static address _sha1_implCompressMB; 192 static address _sha256_implCompress; 193 static address _sha256_implCompressMB; 194 static address _sha512_implCompress; 195 static address _sha512_implCompressMB; 196 197 static address _updateBytesCRC32; 198 static address _crc_table_adr; 199 200 static address _crc32c_table_addr; 201 static address _updateBytesCRC32C; 202 static address _updateBytesAdler32; 203 204 static address _multiplyToLen; 205 static address _squareToLen; 206 static address _mulAdd; 207 static address _montgomeryMultiply; 208 static address _montgomerySquare; 209 210 static address _dexp; 211 static address _dlog; 212 213 // These are versions of the java.lang.Math methods which perform 214 // the same operations as the intrinsic version. They are used for 215 // constant folding in the compiler to ensure equivalence. If the 216 // intrinsic version returns the same result as the strict version 217 // then they can be set to the appropriate function from 218 // SharedRuntime. 219 static double (*_intrinsic_log)(double); 220 static double (*_intrinsic_log10)(double); 221 static double (*_intrinsic_pow)(double, double); 222 static double (*_intrinsic_sin)(double); 223 static double (*_intrinsic_cos)(double); 224 static double (*_intrinsic_tan)(double); 225 226 // Safefetch stubs. 227 static address _safefetch32_entry; 228 static address _safefetch32_fault_pc; 229 static address _safefetch32_continuation_pc; 230 static address _safefetchN_entry; 231 static address _safefetchN_fault_pc; 232 static address _safefetchN_continuation_pc; 233 234 public: 235 // Initialization/Testing 236 static void initialize1(); // must happen before universe::genesis 237 static void initialize2(); // must happen after universe::genesis 238 239 static bool is_stub_code(address addr) { return contains(addr); } 240 241 static bool contains(address addr) { 242 return 243 (_code1 != NULL && _code1->blob_contains(addr)) || 244 (_code2 != NULL && _code2->blob_contains(addr)) ; 245 } 246 247 static CodeBlob* code1() { return _code1; } 248 static CodeBlob* code2() { return _code2; } 249 250 // Debugging 251 static jint verify_oop_count() { return _verify_oop_count; } 252 static jint* verify_oop_count_addr() { return &_verify_oop_count; } 253 // a subroutine for debugging the GC 254 static address verify_oop_subroutine_entry_address() { return (address)&_verify_oop_subroutine_entry; } 255 256 static address catch_exception_entry() { return _catch_exception_entry; } 257 258 // Calls to Java 259 typedef void (*CallStub)( 260 address link, 261 intptr_t* result, 262 BasicType result_type, 263 Method* method, 264 address entry_point, 265 intptr_t* parameters, 266 int size_of_parameters, 267 TRAPS 268 ); 269 270 static CallStub call_stub() { return CAST_TO_FN_PTR(CallStub, _call_stub_entry); } 271 272 // Exceptions 273 static address forward_exception_entry() { return _forward_exception_entry; } 274 // Implicit exceptions 275 static address throw_AbstractMethodError_entry() { return _throw_AbstractMethodError_entry; } 276 static address throw_IncompatibleClassChangeError_entry(){ return _throw_IncompatibleClassChangeError_entry; } 277 static address throw_NullPointerException_at_call_entry(){ return _throw_NullPointerException_at_call_entry; } 278 static address throw_StackOverflowError_entry() { return _throw_StackOverflowError_entry; } 279 280 // Exceptions during unsafe access - should throw Java exception rather 281 // than crash. 282 static address handler_for_unsafe_access() { return _handler_for_unsafe_access_entry; } 283 284 static address atomic_xchg_entry() { return _atomic_xchg_entry; } 285 static address atomic_xchg_ptr_entry() { return _atomic_xchg_ptr_entry; } 286 static address atomic_store_entry() { return _atomic_store_entry; } 287 static address atomic_store_ptr_entry() { return _atomic_store_ptr_entry; } 288 static address atomic_cmpxchg_entry() { return _atomic_cmpxchg_entry; } 289 static address atomic_cmpxchg_ptr_entry() { return _atomic_cmpxchg_ptr_entry; } 290 static address atomic_cmpxchg_byte_entry() { return _atomic_cmpxchg_byte_entry; } 291 static address atomic_cmpxchg_long_entry() { return _atomic_cmpxchg_long_entry; } 292 static address atomic_add_entry() { return _atomic_add_entry; } 293 static address atomic_add_ptr_entry() { return _atomic_add_ptr_entry; } 294 static address fence_entry() { return _fence_entry; } 295 296 static address d2i_wrapper() { return _d2i_wrapper; } 297 static address d2l_wrapper() { return _d2l_wrapper; } 298 static jint fpu_cntrl_wrd_std() { return _fpu_cntrl_wrd_std; } 299 static address addr_fpu_cntrl_wrd_std() { return (address)&_fpu_cntrl_wrd_std; } 300 static address addr_fpu_cntrl_wrd_24() { return (address)&_fpu_cntrl_wrd_24; } 301 static address addr_fpu_cntrl_wrd_64() { return (address)&_fpu_cntrl_wrd_64; } 302 static address addr_fpu_cntrl_wrd_trunc() { return (address)&_fpu_cntrl_wrd_trunc; } 303 static address addr_mxcsr_std() { return (address)&_mxcsr_std; } 304 static address addr_fpu_subnormal_bias1() { return (address)&_fpu_subnormal_bias1; } 305 static address addr_fpu_subnormal_bias2() { return (address)&_fpu_subnormal_bias2; } 306 307 308 static address select_arraycopy_function(BasicType t, bool aligned, bool disjoint, const char* &name, bool dest_uninitialized); 309 310 static address jbyte_arraycopy() { return _jbyte_arraycopy; } 311 static address jshort_arraycopy() { return _jshort_arraycopy; } 312 static address jint_arraycopy() { return _jint_arraycopy; } 313 static address jlong_arraycopy() { return _jlong_arraycopy; } 314 static address oop_arraycopy(bool dest_uninitialized = false) { 315 return dest_uninitialized ? _oop_arraycopy_uninit : _oop_arraycopy; 316 } 317 static address jbyte_disjoint_arraycopy() { return _jbyte_disjoint_arraycopy; } 318 static address jshort_disjoint_arraycopy() { return _jshort_disjoint_arraycopy; } 319 static address jint_disjoint_arraycopy() { return _jint_disjoint_arraycopy; } 320 static address jlong_disjoint_arraycopy() { return _jlong_disjoint_arraycopy; } 321 static address oop_disjoint_arraycopy(bool dest_uninitialized = false) { 322 return dest_uninitialized ? _oop_disjoint_arraycopy_uninit : _oop_disjoint_arraycopy; 323 } 324 325 static address arrayof_jbyte_arraycopy() { return _arrayof_jbyte_arraycopy; } 326 static address arrayof_jshort_arraycopy() { return _arrayof_jshort_arraycopy; } 327 static address arrayof_jint_arraycopy() { return _arrayof_jint_arraycopy; } 328 static address arrayof_jlong_arraycopy() { return _arrayof_jlong_arraycopy; } 329 static address arrayof_oop_arraycopy(bool dest_uninitialized = false) { 330 return dest_uninitialized ? _arrayof_oop_arraycopy_uninit : _arrayof_oop_arraycopy; 331 } 332 333 static address arrayof_jbyte_disjoint_arraycopy() { return _arrayof_jbyte_disjoint_arraycopy; } 334 static address arrayof_jshort_disjoint_arraycopy() { return _arrayof_jshort_disjoint_arraycopy; } 335 static address arrayof_jint_disjoint_arraycopy() { return _arrayof_jint_disjoint_arraycopy; } 336 static address arrayof_jlong_disjoint_arraycopy() { return _arrayof_jlong_disjoint_arraycopy; } 337 static address arrayof_oop_disjoint_arraycopy(bool dest_uninitialized = false) { 338 return dest_uninitialized ? _arrayof_oop_disjoint_arraycopy_uninit : _arrayof_oop_disjoint_arraycopy; 339 } 340 341 static address checkcast_arraycopy(bool dest_uninitialized = false) { 342 return dest_uninitialized ? _checkcast_arraycopy_uninit : _checkcast_arraycopy; 343 } 344 static address unsafe_arraycopy() { return _unsafe_arraycopy; } 345 static address generic_arraycopy() { return _generic_arraycopy; } 346 347 static address jbyte_fill() { return _jbyte_fill; } 348 static address jshort_fill() { return _jshort_fill; } 349 static address jint_fill() { return _jint_fill; } 350 static address arrayof_jbyte_fill() { return _arrayof_jbyte_fill; } 351 static address arrayof_jshort_fill() { return _arrayof_jshort_fill; } 352 static address arrayof_jint_fill() { return _arrayof_jint_fill; } 353 354 static address aescrypt_encryptBlock() { return _aescrypt_encryptBlock; } 355 static address aescrypt_decryptBlock() { return _aescrypt_decryptBlock; } 356 static address cipherBlockChaining_encryptAESCrypt() { return _cipherBlockChaining_encryptAESCrypt; } 357 static address cipherBlockChaining_decryptAESCrypt() { return _cipherBlockChaining_decryptAESCrypt; } 358 static address ghash_processBlocks() { return _ghash_processBlocks; } 359 360 static address sha1_implCompress() { return _sha1_implCompress; } 361 static address sha1_implCompressMB() { return _sha1_implCompressMB; } 362 static address sha256_implCompress() { return _sha256_implCompress; } 363 static address sha256_implCompressMB() { return _sha256_implCompressMB; } 364 static address sha512_implCompress() { return _sha512_implCompress; } 365 static address sha512_implCompressMB() { return _sha512_implCompressMB; } 366 367 static address updateBytesCRC32() { return _updateBytesCRC32; } 368 static address crc_table_addr() { return _crc_table_adr; } 369 370 static address crc32c_table_addr() { return _crc32c_table_addr; } 371 static address updateBytesCRC32C() { return _updateBytesCRC32C; } 372 static address updateBytesAdler32() { return _updateBytesAdler32; } 373 374 static address multiplyToLen() {return _multiplyToLen; } 375 static address squareToLen() {return _squareToLen; } 376 static address mulAdd() {return _mulAdd; } 377 static address montgomeryMultiply() { return _montgomeryMultiply; } 378 static address montgomerySquare() { return _montgomerySquare; } 379 380 static address dexp() { return _dexp; } 381 static address dlog() { return _dlog; } 382 383 static address select_fill_function(BasicType t, bool aligned, const char* &name); 384 385 static address zero_aligned_words() { return _zero_aligned_words; } 386 387 static double intrinsic_log(double d) { 388 assert(_intrinsic_log != NULL, "must be defined"); 389 return _intrinsic_log(d); 390 } 391 static double intrinsic_log10(double d) { 392 assert(_intrinsic_log != NULL, "must be defined"); 393 return _intrinsic_log10(d); 394 } 395 static double intrinsic_pow(double d, double d2) { 396 assert(_intrinsic_pow != NULL, "must be defined"); 397 return _intrinsic_pow(d, d2); 398 } 399 static double intrinsic_sin(double d) { 400 assert(_intrinsic_sin != NULL, "must be defined"); 401 return _intrinsic_sin(d); 402 } 403 static double intrinsic_cos(double d) { 404 assert(_intrinsic_cos != NULL, "must be defined"); 405 return _intrinsic_cos(d); 406 } 407 static double intrinsic_tan(double d) { 408 assert(_intrinsic_tan != NULL, "must be defined"); 409 return _intrinsic_tan(d); 410 } 411 412 // 413 // Safefetch stub support 414 // 415 416 typedef int (*SafeFetch32Stub)(int* adr, int errValue); 417 typedef intptr_t (*SafeFetchNStub) (intptr_t* adr, intptr_t errValue); 418 419 static SafeFetch32Stub SafeFetch32_stub() { return CAST_TO_FN_PTR(SafeFetch32Stub, _safefetch32_entry); } 420 static SafeFetchNStub SafeFetchN_stub() { return CAST_TO_FN_PTR(SafeFetchNStub, _safefetchN_entry); } 421 422 static bool is_safefetch_fault(address pc) { 423 return pc != NULL && 424 (pc == _safefetch32_fault_pc || 425 pc == _safefetchN_fault_pc); 426 } 427 428 static address continuation_for_safefetch_fault(address pc) { 429 assert(_safefetch32_continuation_pc != NULL && 430 _safefetchN_continuation_pc != NULL, 431 "not initialized"); 432 433 if (pc == _safefetch32_fault_pc) return _safefetch32_continuation_pc; 434 if (pc == _safefetchN_fault_pc) return _safefetchN_continuation_pc; 435 436 ShouldNotReachHere(); 437 return NULL; 438 } 439 440 // 441 // Default versions of the above arraycopy functions for platforms which do 442 // not have specialized versions 443 // 444 static void jbyte_copy (jbyte* src, jbyte* dest, size_t count); 445 static void jshort_copy (jshort* src, jshort* dest, size_t count); 446 static void jint_copy (jint* src, jint* dest, size_t count); 447 static void jlong_copy (jlong* src, jlong* dest, size_t count); 448 static void oop_copy (oop* src, oop* dest, size_t count); 449 static void oop_copy_uninit(oop* src, oop* dest, size_t count); 450 451 static void arrayof_jbyte_copy (HeapWord* src, HeapWord* dest, size_t count); 452 static void arrayof_jshort_copy (HeapWord* src, HeapWord* dest, size_t count); 453 static void arrayof_jint_copy (HeapWord* src, HeapWord* dest, size_t count); 454 static void arrayof_jlong_copy (HeapWord* src, HeapWord* dest, size_t count); 455 static void arrayof_oop_copy (HeapWord* src, HeapWord* dest, size_t count); 456 static void arrayof_oop_copy_uninit(HeapWord* src, HeapWord* dest, size_t count); 457 }; 458 459 // Safefetch allows to load a value from a location that's not known 460 // to be valid. If the load causes a fault, the error value is returned. 461 inline int SafeFetch32(int* adr, int errValue) { 462 assert(StubRoutines::SafeFetch32_stub(), "stub not yet generated"); 463 return StubRoutines::SafeFetch32_stub()(adr, errValue); 464 } 465 inline intptr_t SafeFetchN(intptr_t* adr, intptr_t errValue) { 466 assert(StubRoutines::SafeFetchN_stub(), "stub not yet generated"); 467 return StubRoutines::SafeFetchN_stub()(adr, errValue); 468 } 469 470 471 // returns true if SafeFetch32 and SafeFetchN can be used safely (stubroutines are already generated) 472 inline bool CanUseSafeFetch32() { 473 return StubRoutines::SafeFetch32_stub() ? true : false; 474 } 475 476 inline bool CanUseSafeFetchN() { 477 return StubRoutines::SafeFetchN_stub() ? true : false; 478 } 479 #endif // SHARE_VM_RUNTIME_STUBROUTINES_HPP