1 /* 2 * Copyright (c) 1999, 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 "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 "nativeInst_sparc.hpp" 32 #include "runtime/sharedRuntime.hpp" 33 #include "utilities/macros.hpp" 34 #include "vmreg_sparc.inline.hpp" 35 #if INCLUDE_ALL_GCS 36 #include "gc_implementation/g1/g1SATBCardTableModRefBS.hpp" 37 #endif // INCLUDE_ALL_GCS 38 39 #define __ ce->masm()-> 40 41 RangeCheckStub::RangeCheckStub(CodeEmitInfo* info, LIR_Opr index, 42 bool throw_index_out_of_bounds_exception) 43 : _throw_index_out_of_bounds_exception(throw_index_out_of_bounds_exception) 44 , _index(index) 45 { 46 assert(info != NULL, "must have info"); 47 _info = new CodeEmitInfo(info); 48 } 49 50 51 void RangeCheckStub::emit_code(LIR_Assembler* ce) { 52 __ bind(_entry); 53 54 if (_info->deoptimize_on_exception()) { 55 address a = Runtime1::entry_for(Runtime1::predicate_failed_trap_id); 56 __ call(a, relocInfo::runtime_call_type); 57 __ delayed()->nop(); 58 ce->add_call_info_here(_info); 59 ce->verify_oop_map(_info); 60 debug_only(__ should_not_reach_here()); 61 return; 62 } 63 64 if (_index->is_register()) { 65 __ mov(_index->as_register(), G4); 66 } else { 67 __ set(_index->as_jint(), G4); 68 } 69 if (_throw_index_out_of_bounds_exception) { 70 __ call(Runtime1::entry_for(Runtime1::throw_index_exception_id), relocInfo::runtime_call_type); 71 } else { 72 __ call(Runtime1::entry_for(Runtime1::throw_range_check_failed_id), relocInfo::runtime_call_type); 73 } 74 __ delayed()->nop(); 75 ce->add_call_info_here(_info); 76 ce->verify_oop_map(_info); 77 debug_only(__ should_not_reach_here()); 78 } 79 80 PredicateFailedStub::PredicateFailedStub(CodeEmitInfo* info) { 81 _info = new CodeEmitInfo(info); 82 } 83 84 void PredicateFailedStub::emit_code(LIR_Assembler* ce) { 85 __ bind(_entry); 86 address a = Runtime1::entry_for(Runtime1::predicate_failed_trap_id); 87 __ call(a, relocInfo::runtime_call_type); 88 __ delayed()->nop(); 89 ce->add_call_info_here(_info); 90 ce->verify_oop_map(_info); 91 debug_only(__ should_not_reach_here()); 92 } 93 94 void CounterOverflowStub::emit_code(LIR_Assembler* ce) { 95 __ bind(_entry); 96 __ set(_bci, G4); 97 __ call(Runtime1::entry_for(Runtime1::counter_overflow_id), relocInfo::runtime_call_type); 98 __ delayed()->mov_or_nop(_method->as_register(), G5); 99 ce->add_call_info_here(_info); 100 ce->verify_oop_map(_info); 101 102 __ br(Assembler::always, true, Assembler::pt, _continuation); 103 __ delayed()->nop(); 104 } 105 106 107 void DivByZeroStub::emit_code(LIR_Assembler* ce) { 108 if (_offset != -1) { 109 ce->compilation()->implicit_exception_table()->append(_offset, __ offset()); 110 } 111 __ bind(_entry); 112 __ call(Runtime1::entry_for(Runtime1::throw_div0_exception_id), relocInfo::runtime_call_type); 113 __ delayed()->nop(); 114 ce->add_call_info_here(_info); 115 ce->verify_oop_map(_info); 116 #ifdef ASSERT 117 __ should_not_reach_here(); 118 #endif 119 } 120 121 122 void ImplicitNullCheckStub::emit_code(LIR_Assembler* ce) { 123 address a; 124 if (_info->deoptimize_on_exception()) { 125 // Deoptimize, do not throw the exception, because it is probably wrong to do it here. 126 a = Runtime1::entry_for(Runtime1::predicate_failed_trap_id); 127 } else { 128 a = Runtime1::entry_for(Runtime1::throw_null_pointer_exception_id); 129 } 130 131 ce->compilation()->implicit_exception_table()->append(_offset, __ offset()); 132 __ bind(_entry); 133 __ call(a, relocInfo::runtime_call_type); 134 __ delayed()->nop(); 135 ce->add_call_info_here(_info); 136 ce->verify_oop_map(_info); 137 #ifdef ASSERT 138 __ should_not_reach_here(); 139 #endif 140 } 141 142 143 // Implementation of SimpleExceptionStub 144 // Note: %g1 and %g3 are already in use 145 void SimpleExceptionStub::emit_code(LIR_Assembler* ce) { 146 __ bind(_entry); 147 __ call(Runtime1::entry_for(_stub), relocInfo::runtime_call_type); 148 149 if (_obj->is_valid()) { 150 __ delayed()->mov(_obj->as_register(), G4); // _obj contains the optional argument to the stub 151 } else { 152 __ delayed()->mov(G0, G4); 153 } 154 ce->add_call_info_here(_info); 155 #ifdef ASSERT 156 __ should_not_reach_here(); 157 #endif 158 } 159 160 161 // Implementation of NewInstanceStub 162 163 NewInstanceStub::NewInstanceStub(LIR_Opr klass_reg, LIR_Opr result, ciInstanceKlass* klass, CodeEmitInfo* info, Runtime1::StubID stub_id) { 164 _result = result; 165 _klass = klass; 166 _klass_reg = klass_reg; 167 _info = new CodeEmitInfo(info); 168 assert(stub_id == Runtime1::new_instance_id || 169 stub_id == Runtime1::fast_new_instance_id || 170 stub_id == Runtime1::fast_new_instance_init_check_id, 171 "need new_instance id"); 172 _stub_id = stub_id; 173 } 174 175 176 void NewInstanceStub::emit_code(LIR_Assembler* ce) { 177 __ bind(_entry); 178 __ call(Runtime1::entry_for(_stub_id), relocInfo::runtime_call_type); 179 __ delayed()->mov_or_nop(_klass_reg->as_register(), G5); 180 ce->add_call_info_here(_info); 181 ce->verify_oop_map(_info); 182 __ br(Assembler::always, false, Assembler::pt, _continuation); 183 __ delayed()->mov_or_nop(O0, _result->as_register()); 184 } 185 186 187 // Implementation of NewTypeArrayStub 188 NewTypeArrayStub::NewTypeArrayStub(LIR_Opr klass_reg, LIR_Opr length, LIR_Opr result, CodeEmitInfo* info) { 189 _klass_reg = klass_reg; 190 _length = length; 191 _result = result; 192 _info = new CodeEmitInfo(info); 193 } 194 195 196 void NewTypeArrayStub::emit_code(LIR_Assembler* ce) { 197 __ bind(_entry); 198 199 __ mov(_length->as_register(), G4); 200 __ call(Runtime1::entry_for(Runtime1::new_type_array_id), relocInfo::runtime_call_type); 201 __ delayed()->mov_or_nop(_klass_reg->as_register(), G5); 202 ce->add_call_info_here(_info); 203 ce->verify_oop_map(_info); 204 __ br(Assembler::always, false, Assembler::pt, _continuation); 205 __ delayed()->mov_or_nop(O0, _result->as_register()); 206 } 207 208 209 // Implementation of NewObjectArrayStub 210 211 NewObjectArrayStub::NewObjectArrayStub(LIR_Opr klass_reg, LIR_Opr length, LIR_Opr result, CodeEmitInfo* info) { 212 _klass_reg = klass_reg; 213 _length = length; 214 _result = result; 215 _info = new CodeEmitInfo(info); 216 } 217 218 219 void NewObjectArrayStub::emit_code(LIR_Assembler* ce) { 220 __ bind(_entry); 221 222 __ mov(_length->as_register(), G4); 223 __ call(Runtime1::entry_for(Runtime1::new_object_array_id), relocInfo::runtime_call_type); 224 __ delayed()->mov_or_nop(_klass_reg->as_register(), G5); 225 ce->add_call_info_here(_info); 226 ce->verify_oop_map(_info); 227 __ br(Assembler::always, false, Assembler::pt, _continuation); 228 __ delayed()->mov_or_nop(O0, _result->as_register()); 229 } 230 231 232 // Implementation of MonitorAccessStubs 233 MonitorEnterStub::MonitorEnterStub(LIR_Opr obj_reg, LIR_Opr lock_reg, CodeEmitInfo* info) 234 : MonitorAccessStub(obj_reg, lock_reg) { 235 _info = new CodeEmitInfo(info); 236 } 237 238 239 void MonitorEnterStub::emit_code(LIR_Assembler* ce) { 240 __ bind(_entry); 241 __ mov(_obj_reg->as_register(), G4); 242 if (ce->compilation()->has_fpu_code()) { 243 __ call(Runtime1::entry_for(Runtime1::monitorenter_id), relocInfo::runtime_call_type); 244 } else { 245 __ call(Runtime1::entry_for(Runtime1::monitorenter_nofpu_id), relocInfo::runtime_call_type); 246 } 247 __ delayed()->mov_or_nop(_lock_reg->as_register(), G5); 248 ce->add_call_info_here(_info); 249 ce->verify_oop_map(_info); 250 __ br(Assembler::always, true, Assembler::pt, _continuation); 251 __ delayed()->nop(); 252 } 253 254 255 void MonitorExitStub::emit_code(LIR_Assembler* ce) { 256 __ bind(_entry); 257 if (_compute_lock) { 258 ce->monitor_address(_monitor_ix, _lock_reg); 259 } 260 if (ce->compilation()->has_fpu_code()) { 261 __ call(Runtime1::entry_for(Runtime1::monitorexit_id), relocInfo::runtime_call_type); 262 } else { 263 __ call(Runtime1::entry_for(Runtime1::monitorexit_nofpu_id), relocInfo::runtime_call_type); 264 } 265 266 __ delayed()->mov_or_nop(_lock_reg->as_register(), G4); 267 __ br(Assembler::always, true, Assembler::pt, _continuation); 268 __ delayed()->nop(); 269 } 270 271 // Implementation of patching: 272 // - Copy the code at given offset to an inlined buffer (first the bytes, then the number of bytes) 273 // - Replace original code with a call to the stub 274 // At Runtime: 275 // - call to stub, jump to runtime 276 // - in runtime: preserve all registers (especially objects, i.e., source and destination object) 277 // - in runtime: after initializing class, restore original code, reexecute instruction 278 279 int PatchingStub::_patch_info_offset = -NativeGeneralJump::instruction_size; 280 281 void PatchingStub::align_patch_site(MacroAssembler* ) { 282 // patch sites on sparc are always properly aligned. 283 } 284 285 void PatchingStub::emit_code(LIR_Assembler* ce) { 286 // copy original code here 287 assert(NativeCall::instruction_size <= _bytes_to_copy && _bytes_to_copy <= 0xFF, 288 "not enough room for call"); 289 assert((_bytes_to_copy & 0x3) == 0, "must copy a multiple of four bytes"); 290 291 Label call_patch; 292 293 int being_initialized_entry = __ offset(); 294 295 if (_id == load_klass_id) { 296 // produce a copy of the load klass instruction for use by the being initialized case 297 #ifdef ASSERT 298 address start = __ pc(); 299 #endif 300 AddressLiteral addrlit(NULL, metadata_Relocation::spec(_index)); 301 __ patchable_set(addrlit, _obj); 302 303 #ifdef ASSERT 304 for (int i = 0; i < _bytes_to_copy; i++) { 305 address ptr = (address)(_pc_start + i); 306 int a_byte = (*ptr) & 0xFF; 307 assert(a_byte == *start++, "should be the same code"); 308 } 309 #endif 310 } else if (_id == load_mirror_id || _id == load_appendix_id) { 311 // produce a copy of the load mirror instruction for use by the being initialized case 312 #ifdef ASSERT 313 address start = __ pc(); 314 #endif 315 AddressLiteral addrlit(NULL, oop_Relocation::spec(_index)); 316 __ patchable_set(addrlit, _obj); 317 318 #ifdef ASSERT 319 for (int i = 0; i < _bytes_to_copy; i++) { 320 address ptr = (address)(_pc_start + i); 321 int a_byte = (*ptr) & 0xFF; 322 assert(a_byte == *start++, "should be the same code"); 323 } 324 #endif 325 } else { 326 // make a copy the code which is going to be patched. 327 for (int i = 0; i < _bytes_to_copy; i++) { 328 address ptr = (address)(_pc_start + i); 329 int a_byte = (*ptr) & 0xFF; 330 __ emit_int8 (a_byte); 331 } 332 } 333 334 address end_of_patch = __ pc(); 335 int bytes_to_skip = 0; 336 if (_id == load_mirror_id) { 337 int offset = __ offset(); 338 if (CommentedAssembly) { 339 __ block_comment(" being_initialized check"); 340 } 341 342 // static field accesses have special semantics while the class 343 // initializer is being run so we emit a test which can be used to 344 // check that this code is being executed by the initializing 345 // thread. 346 assert(_obj != noreg, "must be a valid register"); 347 assert(_index >= 0, "must have oop index"); 348 __ ld_ptr(_obj, java_lang_Class::klass_offset_in_bytes(), G3); 349 __ ld_ptr(G3, in_bytes(InstanceKlass::init_thread_offset()), G3); 350 __ cmp_and_brx_short(G2_thread, G3, Assembler::notEqual, Assembler::pn, call_patch); 351 352 // load_klass patches may execute the patched code before it's 353 // copied back into place so we need to jump back into the main 354 // code of the nmethod to continue execution. 355 __ br(Assembler::always, false, Assembler::pt, _patch_site_continuation); 356 __ delayed()->nop(); 357 358 // make sure this extra code gets skipped 359 bytes_to_skip += __ offset() - offset; 360 } 361 362 // Now emit the patch record telling the runtime how to find the 363 // pieces of the patch. We only need 3 bytes but it has to be 364 // aligned as an instruction so emit 4 bytes. 365 int sizeof_patch_record = 4; 366 bytes_to_skip += sizeof_patch_record; 367 368 // emit the offsets needed to find the code to patch 369 int being_initialized_entry_offset = __ offset() - being_initialized_entry + sizeof_patch_record; 370 371 // Emit the patch record. We need to emit a full word, so emit an extra empty byte 372 __ emit_int8(0); 373 __ emit_int8(being_initialized_entry_offset); 374 __ emit_int8(bytes_to_skip); 375 __ emit_int8(_bytes_to_copy); 376 address patch_info_pc = __ pc(); 377 assert(patch_info_pc - end_of_patch == bytes_to_skip, "incorrect patch info"); 378 379 address entry = __ pc(); 380 NativeGeneralJump::insert_unconditional((address)_pc_start, entry); 381 address target = NULL; 382 relocInfo::relocType reloc_type = relocInfo::none; 383 switch (_id) { 384 case access_field_id: target = Runtime1::entry_for(Runtime1::access_field_patching_id); break; 385 case load_klass_id: target = Runtime1::entry_for(Runtime1::load_klass_patching_id); reloc_type = relocInfo::metadata_type; break; 386 case load_mirror_id: target = Runtime1::entry_for(Runtime1::load_mirror_patching_id); reloc_type = relocInfo::oop_type; break; 387 case load_appendix_id: target = Runtime1::entry_for(Runtime1::load_appendix_patching_id); reloc_type = relocInfo::oop_type; break; 388 default: ShouldNotReachHere(); 389 } 390 __ bind(call_patch); 391 392 if (CommentedAssembly) { 393 __ block_comment("patch entry point"); 394 } 395 __ call(target, relocInfo::runtime_call_type); 396 __ delayed()->nop(); 397 assert(_patch_info_offset == (patch_info_pc - __ pc()), "must not change"); 398 ce->add_call_info_here(_info); 399 __ br(Assembler::always, false, Assembler::pt, _patch_site_entry); 400 __ delayed()->nop(); 401 if (_id == load_klass_id || _id == load_mirror_id || _id == load_appendix_id) { 402 CodeSection* cs = __ code_section(); 403 address pc = (address)_pc_start; 404 RelocIterator iter(cs, pc, pc + 1); 405 relocInfo::change_reloc_info_for_address(&iter, (address) pc, reloc_type, relocInfo::none); 406 407 pc = (address)(_pc_start + NativeMovConstReg::add_offset); 408 RelocIterator iter2(cs, pc, pc+1); 409 relocInfo::change_reloc_info_for_address(&iter2, (address) pc, reloc_type, relocInfo::none); 410 } 411 412 } 413 414 415 void DeoptimizeStub::emit_code(LIR_Assembler* ce) { 416 __ bind(_entry); 417 __ set(_trap_request, G4); 418 __ call(Runtime1::entry_for(Runtime1::deoptimize_id), relocInfo::runtime_call_type); 419 __ delayed()->nop(); 420 ce->add_call_info_here(_info); 421 DEBUG_ONLY(__ should_not_reach_here()); 422 } 423 424 425 void ArrayCopyStub::emit_code(LIR_Assembler* ce) { 426 //---------------slow case: call to native----------------- 427 __ bind(_entry); 428 __ mov(src()->as_register(), O0); 429 __ mov(src_pos()->as_register(), O1); 430 __ mov(dst()->as_register(), O2); 431 __ mov(dst_pos()->as_register(), O3); 432 __ mov(length()->as_register(), O4); 433 434 ce->emit_static_call_stub(); 435 436 __ call(SharedRuntime::get_resolve_static_call_stub(), relocInfo::static_call_type); 437 __ delayed()->nop(); 438 ce->add_call_info_here(info()); 439 ce->verify_oop_map(info()); 440 441 #ifndef PRODUCT 442 __ set((intptr_t)&Runtime1::_arraycopy_slowcase_cnt, O0); 443 __ ld(O0, 0, O1); 444 __ inc(O1); 445 __ st(O1, 0, O0); 446 #endif 447 448 __ br(Assembler::always, false, Assembler::pt, _continuation); 449 __ delayed()->nop(); 450 } 451 452 453 /////////////////////////////////////////////////////////////////////////////////// 454 #if INCLUDE_ALL_GCS 455 456 void G1PreBarrierStub::emit_code(LIR_Assembler* ce) { 457 // At this point we know that marking is in progress. 458 // If do_load() is true then we have to emit the 459 // load of the previous value; otherwise it has already 460 // been loaded into _pre_val. 461 462 __ bind(_entry); 463 464 assert(pre_val()->is_register(), "Precondition."); 465 Register pre_val_reg = pre_val()->as_register(); 466 467 if (do_load()) { 468 ce->mem2reg(addr(), pre_val(), T_OBJECT, patch_code(), info(), false /*wide*/, false /*unaligned*/); 469 } 470 471 if (__ is_in_wdisp16_range(_continuation)) { 472 __ br_null(pre_val_reg, /*annul*/false, Assembler::pt, _continuation); 473 } else { 474 __ cmp(pre_val_reg, G0); 475 __ brx(Assembler::equal, false, Assembler::pn, _continuation); 476 } 477 __ delayed()->nop(); 478 479 __ call(Runtime1::entry_for(Runtime1::Runtime1::g1_pre_barrier_slow_id)); 480 __ delayed()->mov(pre_val_reg, G4); 481 __ br(Assembler::always, false, Assembler::pt, _continuation); 482 __ delayed()->nop(); 483 484 } 485 486 void G1PostBarrierStub::emit_code(LIR_Assembler* ce) { 487 __ bind(_entry); 488 489 assert(addr()->is_register(), "Precondition."); 490 assert(new_val()->is_register(), "Precondition."); 491 Register addr_reg = addr()->as_pointer_register(); 492 Register new_val_reg = new_val()->as_register(); 493 494 if (__ is_in_wdisp16_range(_continuation)) { 495 __ br_null(new_val_reg, /*annul*/false, Assembler::pt, _continuation); 496 } else { 497 __ cmp(new_val_reg, G0); 498 __ brx(Assembler::equal, false, Assembler::pn, _continuation); 499 } 500 __ delayed()->nop(); 501 502 __ call(Runtime1::entry_for(Runtime1::Runtime1::g1_post_barrier_slow_id)); 503 __ delayed()->mov(addr_reg, G4); 504 __ br(Assembler::always, false, Assembler::pt, _continuation); 505 __ delayed()->nop(); 506 } 507 508 #endif // INCLUDE_ALL_GCS 509 /////////////////////////////////////////////////////////////////////////////////// 510 511 #undef __