1 /* 2 * Copyright (c) 1999, 2020, 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 "c1/c1_CodeStubs.hpp" 27 #include "c1/c1_FrameMap.hpp" 28 #include "c1/c1_LIRAssembler.hpp" 29 #include "c1/c1_MacroAssembler.hpp" 30 #include "c1/c1_Runtime1.hpp" 31 #include "classfile/javaClasses.hpp" 32 #include "nativeInst_x86.hpp" 33 #include "oops/objArrayKlass.hpp" 34 #include "runtime/sharedRuntime.hpp" 35 #include "utilities/align.hpp" 36 #include "utilities/macros.hpp" 37 #include "vmreg_x86.inline.hpp" 38 39 40 #define __ ce->masm()-> 41 42 #ifndef _LP64 43 float ConversionStub::float_zero = 0.0; 44 double ConversionStub::double_zero = 0.0; 45 46 void ConversionStub::emit_code(LIR_Assembler* ce) { 47 __ bind(_entry); 48 assert(bytecode() == Bytecodes::_f2i || bytecode() == Bytecodes::_d2i, "other conversions do not require stub"); 49 50 51 if (input()->is_single_xmm()) { 52 __ comiss(input()->as_xmm_float_reg(), 53 ExternalAddress((address)&float_zero)); 54 } else if (input()->is_double_xmm()) { 55 __ comisd(input()->as_xmm_double_reg(), 56 ExternalAddress((address)&double_zero)); 57 } else { 58 __ push(rax); 59 __ ftst(); 60 __ fnstsw_ax(); 61 __ sahf(); 62 __ pop(rax); 63 } 64 65 Label NaN, do_return; 66 __ jccb(Assembler::parity, NaN); 67 __ jccb(Assembler::below, do_return); 68 69 // input is > 0 -> return maxInt 70 // result register already contains 0x80000000, so subtracting 1 gives 0x7fffffff 71 __ decrement(result()->as_register()); 72 __ jmpb(do_return); 73 74 // input is NaN -> return 0 75 __ bind(NaN); 76 __ xorptr(result()->as_register(), result()->as_register()); 77 78 __ bind(do_return); 79 __ jmp(_continuation); 80 } 81 #endif // !_LP64 82 83 void C1SafepointPollStub::emit_code(LIR_Assembler* ce) { 84 __ bind(_entry); 85 InternalAddress safepoint_pc(ce->masm()->pc() - ce->masm()->offset() + safepoint_offset()); 86 #ifdef _LP64 87 __ lea(rscratch1, safepoint_pc); 88 __ movptr(Address(r15_thread, JavaThread::saved_exception_pc_offset()), rscratch1); 89 #else 90 const Register tmp1 = rcx; 91 const Register tmp2 = rdx; 92 __ push(tmp1); 93 __ push(tmp2); 94 95 __ lea(tmp1, safepoint_pc); 96 __ get_thread(tmp2); 97 __ movptr(Address(tmp2, JavaThread::saved_exception_pc_offset()), tmp1); 98 99 __ pop(tmp2); 100 __ pop(tmp1); 101 #endif /* _LP64 */ 102 assert(SharedRuntime::polling_page_return_handler_blob() != NULL, 103 "polling page return stub not created yet"); 104 105 address stub = SharedRuntime::polling_page_return_handler_blob()->entry_point(); 106 __ jump(RuntimeAddress(stub)); 107 } 108 109 void CounterOverflowStub::emit_code(LIR_Assembler* ce) { 110 __ bind(_entry); 111 Metadata *m = _method->as_constant_ptr()->as_metadata(); 112 ce->store_parameter(m, 1); 113 ce->store_parameter(_bci, 0); 114 __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::counter_overflow_id))); 115 ce->add_call_info_here(_info); 116 ce->verify_oop_map(_info); 117 __ jmp(_continuation); 118 } 119 120 RangeCheckStub::RangeCheckStub(CodeEmitInfo* info, LIR_Opr index, LIR_Opr array) 121 : _index(index), _array(array), _throw_index_out_of_bounds_exception(false) { 122 assert(info != NULL, "must have info"); 123 _info = new CodeEmitInfo(info); 124 } 125 126 RangeCheckStub::RangeCheckStub(CodeEmitInfo* info, LIR_Opr index) 127 : _index(index), _array(), _throw_index_out_of_bounds_exception(true) { 128 assert(info != NULL, "must have info"); 129 _info = new CodeEmitInfo(info); 130 } 131 132 void RangeCheckStub::emit_code(LIR_Assembler* ce) { 133 __ bind(_entry); 134 if (_info->deoptimize_on_exception()) { 135 address a = Runtime1::entry_for(Runtime1::predicate_failed_trap_id); 136 __ call(RuntimeAddress(a)); 137 ce->add_call_info_here(_info); 138 ce->verify_oop_map(_info); 139 debug_only(__ should_not_reach_here()); 140 return; 141 } 142 143 // pass the array index on stack because all registers must be preserved 144 if (_index->is_cpu_register()) { 145 ce->store_parameter(_index->as_register(), 0); 146 } else { 147 ce->store_parameter(_index->as_jint(), 0); 148 } 149 Runtime1::StubID stub_id; 150 if (_throw_index_out_of_bounds_exception) { 151 stub_id = Runtime1::throw_index_exception_id; 152 } else { 153 stub_id = Runtime1::throw_range_check_failed_id; 154 ce->store_parameter(_array->as_pointer_register(), 1); 155 } 156 __ call(RuntimeAddress(Runtime1::entry_for(stub_id))); 157 ce->add_call_info_here(_info); 158 ce->verify_oop_map(_info); 159 debug_only(__ should_not_reach_here()); 160 } 161 162 PredicateFailedStub::PredicateFailedStub(CodeEmitInfo* info) { 163 _info = new CodeEmitInfo(info); 164 } 165 166 void PredicateFailedStub::emit_code(LIR_Assembler* ce) { 167 __ bind(_entry); 168 address a = Runtime1::entry_for(Runtime1::predicate_failed_trap_id); 169 __ call(RuntimeAddress(a)); 170 ce->add_call_info_here(_info); 171 ce->verify_oop_map(_info); 172 debug_only(__ should_not_reach_here()); 173 } 174 175 void DivByZeroStub::emit_code(LIR_Assembler* ce) { 176 if (_offset != -1) { 177 ce->compilation()->implicit_exception_table()->append(_offset, __ offset()); 178 } 179 __ bind(_entry); 180 __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::throw_div0_exception_id))); 181 ce->add_call_info_here(_info); 182 debug_only(__ should_not_reach_here()); 183 } 184 185 186 // Implementation of LoadFlattenedArrayStub 187 188 LoadFlattenedArrayStub::LoadFlattenedArrayStub(LIR_Opr array, LIR_Opr index, LIR_Opr result, CodeEmitInfo* info) { 189 _array = array; 190 _index = index; 191 _result = result; 192 // Tell the register allocator that the runtime call will scratch rax. 193 _scratch_reg = FrameMap::rax_oop_opr; 194 _info = new CodeEmitInfo(info); 195 } 196 197 void LoadFlattenedArrayStub::emit_code(LIR_Assembler* ce) { 198 assert(__ rsp_offset() == 0, "frame size should be fixed"); 199 __ bind(_entry); 200 ce->store_parameter(_array->as_register(), 1); 201 ce->store_parameter(_index->as_register(), 0); 202 __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::load_flattened_array_id))); 203 ce->add_call_info_here(_info); 204 ce->verify_oop_map(_info); 205 if (_result->as_register() != rax) { 206 __ movptr(_result->as_register(), rax); 207 } 208 __ jmp(_continuation); 209 } 210 211 212 // Implementation of StoreFlattenedArrayStub 213 214 StoreFlattenedArrayStub::StoreFlattenedArrayStub(LIR_Opr array, LIR_Opr index, LIR_Opr value, CodeEmitInfo* info) { 215 _array = array; 216 _index = index; 217 _value = value; 218 // Tell the register allocator that the runtime call will scratch rax. 219 _scratch_reg = FrameMap::rax_oop_opr; 220 _info = new CodeEmitInfo(info); 221 } 222 223 224 void StoreFlattenedArrayStub::emit_code(LIR_Assembler* ce) { 225 assert(__ rsp_offset() == 0, "frame size should be fixed"); 226 __ bind(_entry); 227 ce->store_parameter(_array->as_register(), 2); 228 ce->store_parameter(_index->as_register(), 1); 229 ce->store_parameter(_value->as_register(), 0); 230 __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::store_flattened_array_id))); 231 ce->add_call_info_here(_info); 232 ce->verify_oop_map(_info); 233 __ jmp(_continuation); 234 } 235 236 237 // Implementation of SubstitutabilityCheckStub 238 239 SubstitutabilityCheckStub::SubstitutabilityCheckStub(LIR_Opr left, LIR_Opr right, CodeEmitInfo* info) { 240 _left = left; 241 _right = right; 242 // Tell the register allocator that the runtime call will scratch rax. 243 _scratch_reg = FrameMap::rax_oop_opr; 244 _info = new CodeEmitInfo(info); 245 } 246 247 void SubstitutabilityCheckStub::emit_code(LIR_Assembler* ce) { 248 assert(__ rsp_offset() == 0, "frame size should be fixed"); 249 __ bind(_entry); 250 ce->store_parameter(_left->as_register(), 1); 251 ce->store_parameter(_right->as_register(), 0); 252 __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::substitutability_check_id))); 253 ce->add_call_info_here(_info); 254 ce->verify_oop_map(_info); 255 __ jmp(_continuation); 256 } 257 258 259 // Implementation of NewInstanceStub 260 261 NewInstanceStub::NewInstanceStub(LIR_Opr klass_reg, LIR_Opr result, ciInstanceKlass* klass, CodeEmitInfo* info, Runtime1::StubID stub_id) { 262 _result = result; 263 _klass = klass; 264 _klass_reg = klass_reg; 265 _info = new CodeEmitInfo(info); 266 assert(stub_id == Runtime1::new_instance_id || 267 stub_id == Runtime1::new_instance_no_inline_id || 268 stub_id == Runtime1::fast_new_instance_id || 269 stub_id == Runtime1::fast_new_instance_init_check_id, 270 "need new_instance id"); 271 _stub_id = stub_id; 272 } 273 274 275 void NewInstanceStub::emit_code(LIR_Assembler* ce) { 276 assert(__ rsp_offset() == 0, "frame size should be fixed"); 277 __ bind(_entry); 278 __ movptr(rdx, _klass_reg->as_register()); 279 __ call(RuntimeAddress(Runtime1::entry_for(_stub_id))); 280 ce->add_call_info_here(_info); 281 ce->verify_oop_map(_info); 282 assert(_result->as_register() == rax, "result must in rax,"); 283 __ jmp(_continuation); 284 } 285 286 287 // Implementation of NewTypeArrayStub 288 289 NewTypeArrayStub::NewTypeArrayStub(LIR_Opr klass_reg, LIR_Opr length, LIR_Opr result, CodeEmitInfo* info) { 290 _klass_reg = klass_reg; 291 _length = length; 292 _result = result; 293 _info = new CodeEmitInfo(info); 294 } 295 296 297 void NewTypeArrayStub::emit_code(LIR_Assembler* ce) { 298 assert(__ rsp_offset() == 0, "frame size should be fixed"); 299 __ bind(_entry); 300 assert(_length->as_register() == rbx, "length must in rbx,"); 301 assert(_klass_reg->as_register() == rdx, "klass_reg must in rdx"); 302 __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::new_type_array_id))); 303 ce->add_call_info_here(_info); 304 ce->verify_oop_map(_info); 305 assert(_result->as_register() == rax, "result must in rax,"); 306 __ jmp(_continuation); 307 } 308 309 310 // Implementation of NewObjectArrayStub 311 312 NewObjectArrayStub::NewObjectArrayStub(LIR_Opr klass_reg, LIR_Opr length, LIR_Opr result, 313 CodeEmitInfo* info, bool is_null_free) { 314 _klass_reg = klass_reg; 315 _result = result; 316 _length = length; 317 _info = new CodeEmitInfo(info); 318 _is_null_free = is_null_free; 319 } 320 321 322 void NewObjectArrayStub::emit_code(LIR_Assembler* ce) { 323 assert(__ rsp_offset() == 0, "frame size should be fixed"); 324 __ bind(_entry); 325 assert(_length->as_register() == rbx, "length must in rbx,"); 326 assert(_klass_reg->as_register() == rdx, "klass_reg must in rdx"); 327 if (_is_null_free) { 328 __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::new_flat_array_id))); 329 } else { 330 __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::new_object_array_id))); 331 } 332 ce->add_call_info_here(_info); 333 ce->verify_oop_map(_info); 334 assert(_result->as_register() == rax, "result must in rax,"); 335 __ jmp(_continuation); 336 } 337 338 339 // Implementation of MonitorAccessStubs 340 341 MonitorEnterStub::MonitorEnterStub(LIR_Opr obj_reg, LIR_Opr lock_reg, CodeEmitInfo* info, CodeStub* throw_imse_stub, LIR_Opr scratch_reg) 342 : MonitorAccessStub(obj_reg, lock_reg) 343 { 344 _info = new CodeEmitInfo(info); 345 _throw_imse_stub = throw_imse_stub; 346 _scratch_reg = scratch_reg; 347 if (_throw_imse_stub != NULL) { 348 assert(_scratch_reg != LIR_OprFact::illegalOpr, "must be"); 349 } 350 } 351 352 353 void MonitorEnterStub::emit_code(LIR_Assembler* ce) { 354 assert(__ rsp_offset() == 0, "frame size should be fixed"); 355 __ bind(_entry); 356 if (_throw_imse_stub != NULL) { 357 // When we come here, _obj_reg has already been checked to be non-null. 358 const int is_value_mask = markWord::inline_type_pattern; 359 Register mark = _scratch_reg->as_register(); 360 __ movptr(mark, Address(_obj_reg->as_register(), oopDesc::mark_offset_in_bytes())); 361 __ andptr(mark, is_value_mask); 362 __ cmpl(mark, is_value_mask); 363 __ jcc(Assembler::equal, *_throw_imse_stub->entry()); 364 } 365 ce->store_parameter(_obj_reg->as_register(), 1); 366 ce->store_parameter(_lock_reg->as_register(), 0); 367 Runtime1::StubID enter_id; 368 if (ce->compilation()->has_fpu_code()) { 369 enter_id = Runtime1::monitorenter_id; 370 } else { 371 enter_id = Runtime1::monitorenter_nofpu_id; 372 } 373 __ call(RuntimeAddress(Runtime1::entry_for(enter_id))); 374 ce->add_call_info_here(_info); 375 ce->verify_oop_map(_info); 376 __ jmp(_continuation); 377 } 378 379 380 void MonitorExitStub::emit_code(LIR_Assembler* ce) { 381 __ bind(_entry); 382 if (_compute_lock) { 383 // lock_reg was destroyed by fast unlocking attempt => recompute it 384 ce->monitor_address(_monitor_ix, _lock_reg); 385 } 386 ce->store_parameter(_lock_reg->as_register(), 0); 387 // note: non-blocking leaf routine => no call info needed 388 Runtime1::StubID exit_id; 389 if (ce->compilation()->has_fpu_code()) { 390 exit_id = Runtime1::monitorexit_id; 391 } else { 392 exit_id = Runtime1::monitorexit_nofpu_id; 393 } 394 __ call(RuntimeAddress(Runtime1::entry_for(exit_id))); 395 __ jmp(_continuation); 396 } 397 398 399 // Implementation of patching: 400 // - Copy the code at given offset to an inlined buffer (first the bytes, then the number of bytes) 401 // - Replace original code with a call to the stub 402 // At Runtime: 403 // - call to stub, jump to runtime 404 // - in runtime: preserve all registers (rspecially objects, i.e., source and destination object) 405 // - in runtime: after initializing class, restore original code, reexecute instruction 406 407 int PatchingStub::_patch_info_offset = -NativeGeneralJump::instruction_size; 408 409 void PatchingStub::align_patch_site(MacroAssembler* masm) { 410 // We're patching a 5-7 byte instruction on intel and we need to 411 // make sure that we don't see a piece of the instruction. It 412 // appears mostly impossible on Intel to simply invalidate other 413 // processors caches and since they may do aggressive prefetch it's 414 // very hard to make a guess about what code might be in the icache. 415 // Force the instruction to be double word aligned so that it 416 // doesn't span a cache line. 417 masm->align(align_up((int)NativeGeneralJump::instruction_size, wordSize)); 418 } 419 420 void PatchingStub::emit_code(LIR_Assembler* ce) { 421 assert(NativeCall::instruction_size <= _bytes_to_copy && _bytes_to_copy <= 0xFF, "not enough room for call"); 422 423 Label call_patch; 424 425 // static field accesses have special semantics while the class 426 // initializer is being run so we emit a test which can be used to 427 // check that this code is being executed by the initializing 428 // thread. 429 address being_initialized_entry = __ pc(); 430 if (CommentedAssembly) { 431 __ block_comment(" patch template"); 432 } 433 if (_id == load_klass_id) { 434 // produce a copy of the load klass instruction for use by the being initialized case 435 #ifdef ASSERT 436 address start = __ pc(); 437 #endif 438 Metadata* o = NULL; 439 __ mov_metadata(_obj, o); 440 #ifdef ASSERT 441 for (int i = 0; i < _bytes_to_copy; i++) { 442 address ptr = (address)(_pc_start + i); 443 int a_byte = (*ptr) & 0xFF; 444 assert(a_byte == *start++, "should be the same code"); 445 } 446 #endif 447 } else if (_id == load_mirror_id) { 448 // produce a copy of the load mirror instruction for use by the being 449 // initialized case 450 #ifdef ASSERT 451 address start = __ pc(); 452 #endif 453 jobject o = NULL; 454 __ movoop(_obj, o); 455 #ifdef ASSERT 456 for (int i = 0; i < _bytes_to_copy; i++) { 457 address ptr = (address)(_pc_start + i); 458 int a_byte = (*ptr) & 0xFF; 459 assert(a_byte == *start++, "should be the same code"); 460 } 461 #endif 462 } else { 463 // make a copy the code which is going to be patched. 464 for (int i = 0; i < _bytes_to_copy; i++) { 465 address ptr = (address)(_pc_start + i); 466 int a_byte = (*ptr) & 0xFF; 467 __ emit_int8(a_byte); 468 *ptr = 0x90; // make the site look like a nop 469 } 470 } 471 472 address end_of_patch = __ pc(); 473 int bytes_to_skip = 0; 474 if (_id == load_mirror_id) { 475 int offset = __ offset(); 476 if (CommentedAssembly) { 477 __ block_comment(" being_initialized check"); 478 } 479 assert(_obj != noreg, "must be a valid register"); 480 Register tmp = rax; 481 Register tmp2 = rbx; 482 __ push(tmp); 483 __ push(tmp2); 484 // Load without verification to keep code size small. We need it because 485 // begin_initialized_entry_offset has to fit in a byte. Also, we know it's not null. 486 __ movptr(tmp2, Address(_obj, java_lang_Class::klass_offset())); 487 __ get_thread(tmp); 488 __ cmpptr(tmp, Address(tmp2, InstanceKlass::init_thread_offset())); 489 __ pop(tmp2); 490 __ pop(tmp); 491 __ jcc(Assembler::notEqual, call_patch); 492 493 // access_field patches may execute the patched code before it's 494 // copied back into place so we need to jump back into the main 495 // code of the nmethod to continue execution. 496 __ jmp(_patch_site_continuation); 497 498 // make sure this extra code gets skipped 499 bytes_to_skip += __ offset() - offset; 500 } 501 if (CommentedAssembly) { 502 __ block_comment("patch data encoded as movl"); 503 } 504 // Now emit the patch record telling the runtime how to find the 505 // pieces of the patch. We only need 3 bytes but for readability of 506 // the disassembly we make the data look like a movl reg, imm32, 507 // which requires 5 bytes 508 int sizeof_patch_record = 5; 509 bytes_to_skip += sizeof_patch_record; 510 511 // emit the offsets needed to find the code to patch 512 int being_initialized_entry_offset = __ pc() - being_initialized_entry + sizeof_patch_record; 513 514 __ emit_int8((unsigned char)0xB8); 515 __ emit_int8(0); 516 __ emit_int8(being_initialized_entry_offset); 517 __ emit_int8(bytes_to_skip); 518 __ emit_int8(_bytes_to_copy); 519 address patch_info_pc = __ pc(); 520 assert(patch_info_pc - end_of_patch == bytes_to_skip, "incorrect patch info"); 521 522 address entry = __ pc(); 523 NativeGeneralJump::insert_unconditional((address)_pc_start, entry); 524 address target = NULL; 525 relocInfo::relocType reloc_type = relocInfo::none; 526 switch (_id) { 527 case access_field_id: target = Runtime1::entry_for(Runtime1::access_field_patching_id); break; 528 case load_klass_id: target = Runtime1::entry_for(Runtime1::load_klass_patching_id); reloc_type = relocInfo::metadata_type; break; 529 case load_mirror_id: target = Runtime1::entry_for(Runtime1::load_mirror_patching_id); reloc_type = relocInfo::oop_type; break; 530 case load_appendix_id: target = Runtime1::entry_for(Runtime1::load_appendix_patching_id); reloc_type = relocInfo::oop_type; break; 531 default: ShouldNotReachHere(); 532 } 533 __ bind(call_patch); 534 535 if (CommentedAssembly) { 536 __ block_comment("patch entry point"); 537 } 538 __ call(RuntimeAddress(target)); 539 assert(_patch_info_offset == (patch_info_pc - __ pc()), "must not change"); 540 ce->add_call_info_here(_info); 541 int jmp_off = __ offset(); 542 __ jmp(_patch_site_entry); 543 // Add enough nops so deoptimization can overwrite the jmp above with a call 544 // and not destroy the world. We cannot use fat nops here, since the concurrent 545 // code rewrite may transiently create the illegal instruction sequence. 546 for (int j = __ offset() ; j < jmp_off + 5 ; j++ ) { 547 __ nop(); 548 } 549 if (_id == load_klass_id || _id == load_mirror_id || _id == load_appendix_id) { 550 CodeSection* cs = __ code_section(); 551 RelocIterator iter(cs, (address)_pc_start, (address)(_pc_start + 1)); 552 relocInfo::change_reloc_info_for_address(&iter, (address) _pc_start, reloc_type, relocInfo::none); 553 } 554 } 555 556 557 void DeoptimizeStub::emit_code(LIR_Assembler* ce) { 558 __ bind(_entry); 559 ce->store_parameter(_trap_request, 0); 560 __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::deoptimize_id))); 561 ce->add_call_info_here(_info); 562 DEBUG_ONLY(__ should_not_reach_here()); 563 } 564 565 566 void ImplicitNullCheckStub::emit_code(LIR_Assembler* ce) { 567 address a; 568 if (_info->deoptimize_on_exception()) { 569 // Deoptimize, do not throw the exception, because it is probably wrong to do it here. 570 a = Runtime1::entry_for(Runtime1::predicate_failed_trap_id); 571 } else { 572 a = Runtime1::entry_for(Runtime1::throw_null_pointer_exception_id); 573 } 574 575 ce->compilation()->implicit_exception_table()->append(_offset, __ offset()); 576 __ bind(_entry); 577 __ call(RuntimeAddress(a)); 578 ce->add_call_info_here(_info); 579 ce->verify_oop_map(_info); 580 debug_only(__ should_not_reach_here()); 581 } 582 583 584 void SimpleExceptionStub::emit_code(LIR_Assembler* ce) { 585 assert(__ rsp_offset() == 0, "frame size should be fixed"); 586 587 __ bind(_entry); 588 // pass the object on stack because all registers must be preserved 589 if (_obj->is_cpu_register()) { 590 ce->store_parameter(_obj->as_register(), 0); 591 } 592 __ call(RuntimeAddress(Runtime1::entry_for(_stub))); 593 ce->add_call_info_here(_info); 594 debug_only(__ should_not_reach_here()); 595 } 596 597 598 void ArrayCopyStub::emit_code(LIR_Assembler* ce) { 599 //---------------slow case: call to native----------------- 600 __ bind(_entry); 601 // Figure out where the args should go 602 // This should really convert the IntrinsicID to the Method* and signature 603 // but I don't know how to do that. 604 // 605 VMRegPair args[5]; 606 BasicType signature[5] = { T_OBJECT, T_INT, T_OBJECT, T_INT, T_INT}; 607 SharedRuntime::java_calling_convention(signature, args, 5); 608 609 // push parameters 610 // (src, src_pos, dest, destPos, length) 611 Register r[5]; 612 r[0] = src()->as_register(); 613 r[1] = src_pos()->as_register(); 614 r[2] = dst()->as_register(); 615 r[3] = dst_pos()->as_register(); 616 r[4] = length()->as_register(); 617 618 // next registers will get stored on the stack 619 for (int i = 0; i < 5 ; i++ ) { 620 VMReg r_1 = args[i].first(); 621 if (r_1->is_stack()) { 622 int st_off = r_1->reg2stack() * wordSize; 623 __ movptr (Address(rsp, st_off), r[i]); 624 } else { 625 assert(r[i] == args[i].first()->as_Register(), "Wrong register for arg "); 626 } 627 } 628 629 ce->align_call(lir_static_call); 630 631 ce->emit_static_call_stub(); 632 if (ce->compilation()->bailed_out()) { 633 return; // CodeCache is full 634 } 635 AddressLiteral resolve(SharedRuntime::get_resolve_static_call_stub(), 636 relocInfo::static_call_type); 637 __ call(resolve); 638 ce->add_call_info_here(info()); 639 640 #ifndef PRODUCT 641 if (PrintC1Statistics) { 642 __ incrementl(ExternalAddress((address)&Runtime1::_arraycopy_slowcase_cnt), rscratch1); 643 } 644 #endif 645 646 __ jmp(_continuation); 647 } 648 649 #undef __