1 /* 2 * Copyright (c) 1999, 2011, 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 "vmreg_sparc.inline.hpp" 34 #ifndef SERIALGC 35 #include "gc_implementation/g1/g1SATBCardTableModRefBS.hpp" 36 #endif 37 38 #define __ ce->masm()-> 39 40 RangeCheckStub::RangeCheckStub(CodeEmitInfo* info, LIR_Opr index, 41 bool throw_index_out_of_bounds_exception) 42 : _throw_index_out_of_bounds_exception(throw_index_out_of_bounds_exception) 43 , _index(index) 44 { 45 assert(info != NULL, "must have info"); 46 _info = new CodeEmitInfo(info); 47 } 48 49 50 void RangeCheckStub::emit_code(LIR_Assembler* ce) { 51 __ bind(_entry); 52 53 if (_index->is_register()) { 54 __ mov(_index->as_register(), G4); 55 } else { 56 __ set(_index->as_jint(), G4); 57 } 58 if (_throw_index_out_of_bounds_exception) { 59 __ call(Runtime1::entry_for(Runtime1::throw_index_exception_id), relocInfo::runtime_call_type); 60 } else { 61 __ call(Runtime1::entry_for(Runtime1::throw_range_check_failed_id), relocInfo::runtime_call_type); 62 } 63 __ delayed()->nop(); 64 ce->add_call_info_here(_info); 65 ce->verify_oop_map(_info); 66 #ifdef ASSERT 67 __ should_not_reach_here(); 68 #endif 69 } 70 71 72 void CounterOverflowStub::emit_code(LIR_Assembler* ce) { 73 __ bind(_entry); 74 __ set(_bci, G4); 75 __ call(Runtime1::entry_for(Runtime1::counter_overflow_id), relocInfo::runtime_call_type); 76 __ delayed()->mov_or_nop(_method->as_register(), G5); 77 ce->add_call_info_here(_info); 78 ce->verify_oop_map(_info); 79 80 __ br(Assembler::always, true, Assembler::pt, _continuation); 81 __ delayed()->nop(); 82 } 83 84 85 void DivByZeroStub::emit_code(LIR_Assembler* ce) { 86 if (_offset != -1) { 87 ce->compilation()->implicit_exception_table()->append(_offset, __ offset()); 88 } 89 __ bind(_entry); 90 __ call(Runtime1::entry_for(Runtime1::throw_div0_exception_id), relocInfo::runtime_call_type); 91 __ delayed()->nop(); 92 ce->add_call_info_here(_info); 93 ce->verify_oop_map(_info); 94 #ifdef ASSERT 95 __ should_not_reach_here(); 96 #endif 97 } 98 99 100 void ImplicitNullCheckStub::emit_code(LIR_Assembler* ce) { 101 ce->compilation()->implicit_exception_table()->append(_offset, __ offset()); 102 __ bind(_entry); 103 __ call(Runtime1::entry_for(Runtime1::throw_null_pointer_exception_id), 104 relocInfo::runtime_call_type); 105 __ delayed()->nop(); 106 ce->add_call_info_here(_info); 107 ce->verify_oop_map(_info); 108 #ifdef ASSERT 109 __ should_not_reach_here(); 110 #endif 111 } 112 113 114 // Implementation of SimpleExceptionStub 115 // Note: %g1 and %g3 are already in use 116 void SimpleExceptionStub::emit_code(LIR_Assembler* ce) { 117 __ bind(_entry); 118 __ call(Runtime1::entry_for(_stub), relocInfo::runtime_call_type); 119 120 if (_obj->is_valid()) { 121 __ delayed()->mov(_obj->as_register(), G4); // _obj contains the optional argument to the stub 122 } else { 123 __ delayed()->mov(G0, G4); 124 } 125 ce->add_call_info_here(_info); 126 #ifdef ASSERT 127 __ should_not_reach_here(); 128 #endif 129 } 130 131 132 // Implementation of NewInstanceStub 133 134 NewInstanceStub::NewInstanceStub(LIR_Opr klass_reg, LIR_Opr result, ciInstanceKlass* klass, CodeEmitInfo* info, Runtime1::StubID stub_id) { 135 _result = result; 136 _klass = klass; 137 _klass_reg = klass_reg; 138 _info = new CodeEmitInfo(info); 139 assert(stub_id == Runtime1::new_instance_id || 140 stub_id == Runtime1::fast_new_instance_id || 141 stub_id == Runtime1::fast_new_instance_init_check_id, 142 "need new_instance id"); 143 _stub_id = stub_id; 144 } 145 146 147 void NewInstanceStub::emit_code(LIR_Assembler* ce) { 148 __ bind(_entry); 149 __ call(Runtime1::entry_for(_stub_id), relocInfo::runtime_call_type); 150 __ delayed()->mov_or_nop(_klass_reg->as_register(), G5); 151 ce->add_call_info_here(_info); 152 ce->verify_oop_map(_info); 153 __ br(Assembler::always, false, Assembler::pt, _continuation); 154 __ delayed()->mov_or_nop(O0, _result->as_register()); 155 } 156 157 158 // Implementation of NewTypeArrayStub 159 NewTypeArrayStub::NewTypeArrayStub(LIR_Opr klass_reg, LIR_Opr length, LIR_Opr result, CodeEmitInfo* info) { 160 _klass_reg = klass_reg; 161 _length = length; 162 _result = result; 163 _info = new CodeEmitInfo(info); 164 } 165 166 167 void NewTypeArrayStub::emit_code(LIR_Assembler* ce) { 168 __ bind(_entry); 169 170 __ mov(_length->as_register(), G4); 171 __ call(Runtime1::entry_for(Runtime1::new_type_array_id), relocInfo::runtime_call_type); 172 __ delayed()->mov_or_nop(_klass_reg->as_register(), G5); 173 ce->add_call_info_here(_info); 174 ce->verify_oop_map(_info); 175 __ br(Assembler::always, false, Assembler::pt, _continuation); 176 __ delayed()->mov_or_nop(O0, _result->as_register()); 177 } 178 179 180 // Implementation of NewObjectArrayStub 181 182 NewObjectArrayStub::NewObjectArrayStub(LIR_Opr klass_reg, LIR_Opr length, LIR_Opr result, CodeEmitInfo* info) { 183 _klass_reg = klass_reg; 184 _length = length; 185 _result = result; 186 _info = new CodeEmitInfo(info); 187 } 188 189 190 void NewObjectArrayStub::emit_code(LIR_Assembler* ce) { 191 __ bind(_entry); 192 193 __ mov(_length->as_register(), G4); 194 __ call(Runtime1::entry_for(Runtime1::new_object_array_id), relocInfo::runtime_call_type); 195 __ delayed()->mov_or_nop(_klass_reg->as_register(), G5); 196 ce->add_call_info_here(_info); 197 ce->verify_oop_map(_info); 198 __ br(Assembler::always, false, Assembler::pt, _continuation); 199 __ delayed()->mov_or_nop(O0, _result->as_register()); 200 } 201 202 203 // Implementation of MonitorAccessStubs 204 MonitorEnterStub::MonitorEnterStub(LIR_Opr obj_reg, LIR_Opr lock_reg, CodeEmitInfo* info) 205 : MonitorAccessStub(obj_reg, lock_reg) { 206 _info = new CodeEmitInfo(info); 207 } 208 209 210 void MonitorEnterStub::emit_code(LIR_Assembler* ce) { 211 __ bind(_entry); 212 __ mov(_obj_reg->as_register(), G4); 213 if (ce->compilation()->has_fpu_code()) { 214 __ call(Runtime1::entry_for(Runtime1::monitorenter_id), relocInfo::runtime_call_type); 215 } else { 216 __ call(Runtime1::entry_for(Runtime1::monitorenter_nofpu_id), relocInfo::runtime_call_type); 217 } 218 __ delayed()->mov_or_nop(_lock_reg->as_register(), G5); 219 ce->add_call_info_here(_info); 220 ce->verify_oop_map(_info); 221 __ br(Assembler::always, true, Assembler::pt, _continuation); 222 __ delayed()->nop(); 223 } 224 225 226 void MonitorExitStub::emit_code(LIR_Assembler* ce) { 227 __ bind(_entry); 228 if (_compute_lock) { 229 ce->monitor_address(_monitor_ix, _lock_reg); 230 } 231 if (ce->compilation()->has_fpu_code()) { 232 __ call(Runtime1::entry_for(Runtime1::monitorexit_id), relocInfo::runtime_call_type); 233 } else { 234 __ call(Runtime1::entry_for(Runtime1::monitorexit_nofpu_id), relocInfo::runtime_call_type); 235 } 236 237 __ delayed()->mov_or_nop(_lock_reg->as_register(), G4); 238 __ br(Assembler::always, true, Assembler::pt, _continuation); 239 __ delayed()->nop(); 240 } 241 242 // Implementation of patching: 243 // - Copy the code at given offset to an inlined buffer (first the bytes, then the number of bytes) 244 // - Replace original code with a call to the stub 245 // At Runtime: 246 // - call to stub, jump to runtime 247 // - in runtime: preserve all registers (especially objects, i.e., source and destination object) 248 // - in runtime: after initializing class, restore original code, reexecute instruction 249 250 int PatchingStub::_patch_info_offset = -NativeGeneralJump::instruction_size; 251 252 void PatchingStub::align_patch_site(MacroAssembler* ) { 253 // patch sites on sparc are always properly aligned. 254 } 255 256 void PatchingStub::emit_code(LIR_Assembler* ce) { 257 // copy original code here 258 assert(NativeCall::instruction_size <= _bytes_to_copy && _bytes_to_copy <= 0xFF, 259 "not enough room for call"); 260 assert((_bytes_to_copy & 0x3) == 0, "must copy a multiple of four bytes"); 261 262 Label call_patch; 263 264 int being_initialized_entry = __ offset(); 265 266 if (_id == load_klass_id) { 267 // produce a copy of the load klass instruction for use by the being initialized case 268 #ifdef ASSERT 269 address start = __ pc(); 270 #endif 271 AddressLiteral addrlit(NULL, oop_Relocation::spec(_oop_index)); 272 __ patchable_set(addrlit, _obj); 273 274 #ifdef ASSERT 275 for (int i = 0; i < _bytes_to_copy; i++) { 276 address ptr = (address)(_pc_start + i); 277 int a_byte = (*ptr) & 0xFF; 278 assert(a_byte == *start++, "should be the same code"); 279 } 280 #endif 281 } else { 282 // make a copy the code which is going to be patched. 283 for (int i = 0; i < _bytes_to_copy; i++) { 284 address ptr = (address)(_pc_start + i); 285 int a_byte = (*ptr) & 0xFF; 286 __ a_byte (a_byte); 287 } 288 } 289 290 address end_of_patch = __ pc(); 291 int bytes_to_skip = 0; 292 if (_id == load_klass_id) { 293 int offset = __ offset(); 294 if (CommentedAssembly) { 295 __ block_comment(" being_initialized check"); 296 } 297 298 // static field accesses have special semantics while the class 299 // initializer is being run so we emit a test which can be used to 300 // check that this code is being executed by the initializing 301 // thread. 302 assert(_obj != noreg, "must be a valid register"); 303 assert(_oop_index >= 0, "must have oop index"); 304 __ load_heap_oop(_obj, java_lang_Class::klass_offset_in_bytes(), G3); 305 __ ld_ptr(G3, instanceKlass::init_thread_offset_in_bytes() + sizeof(klassOopDesc), G3); 306 __ cmp_and_brx_short(G2_thread, G3, Assembler::notEqual, Assembler::pn, call_patch); 307 308 // load_klass patches may execute the patched code before it's 309 // copied back into place so we need to jump back into the main 310 // code of the nmethod to continue execution. 311 __ br(Assembler::always, false, Assembler::pt, _patch_site_continuation); 312 __ delayed()->nop(); 313 314 // make sure this extra code gets skipped 315 bytes_to_skip += __ offset() - offset; 316 } 317 318 // Now emit the patch record telling the runtime how to find the 319 // pieces of the patch. We only need 3 bytes but it has to be 320 // aligned as an instruction so emit 4 bytes. 321 int sizeof_patch_record = 4; 322 bytes_to_skip += sizeof_patch_record; 323 324 // emit the offsets needed to find the code to patch 325 int being_initialized_entry_offset = __ offset() - being_initialized_entry + sizeof_patch_record; 326 327 // Emit the patch record. We need to emit a full word, so emit an extra empty byte 328 __ a_byte(0); 329 __ a_byte(being_initialized_entry_offset); 330 __ a_byte(bytes_to_skip); 331 __ a_byte(_bytes_to_copy); 332 address patch_info_pc = __ pc(); 333 assert(patch_info_pc - end_of_patch == bytes_to_skip, "incorrect patch info"); 334 335 address entry = __ pc(); 336 NativeGeneralJump::insert_unconditional((address)_pc_start, entry); 337 address target = NULL; 338 switch (_id) { 339 case access_field_id: target = Runtime1::entry_for(Runtime1::access_field_patching_id); break; 340 case load_klass_id: target = Runtime1::entry_for(Runtime1::load_klass_patching_id); break; 341 default: ShouldNotReachHere(); 342 } 343 __ bind(call_patch); 344 345 if (CommentedAssembly) { 346 __ block_comment("patch entry point"); 347 } 348 __ call(target, relocInfo::runtime_call_type); 349 __ delayed()->nop(); 350 assert(_patch_info_offset == (patch_info_pc - __ pc()), "must not change"); 351 ce->add_call_info_here(_info); 352 __ br(Assembler::always, false, Assembler::pt, _patch_site_entry); 353 __ delayed()->nop(); 354 if (_id == load_klass_id) { 355 CodeSection* cs = __ code_section(); 356 address pc = (address)_pc_start; 357 RelocIterator iter(cs, pc, pc + 1); 358 relocInfo::change_reloc_info_for_address(&iter, (address) pc, relocInfo::oop_type, relocInfo::none); 359 360 pc = (address)(_pc_start + NativeMovConstReg::add_offset); 361 RelocIterator iter2(cs, pc, pc+1); 362 relocInfo::change_reloc_info_for_address(&iter2, (address) pc, relocInfo::oop_type, relocInfo::none); 363 } 364 365 } 366 367 368 void DeoptimizeStub::emit_code(LIR_Assembler* ce) { 369 __ bind(_entry); 370 __ call(SharedRuntime::deopt_blob()->unpack_with_reexecution()); 371 __ delayed()->nop(); 372 ce->add_call_info_here(_info); 373 debug_only(__ should_not_reach_here()); 374 } 375 376 377 void ArrayCopyStub::emit_code(LIR_Assembler* ce) { 378 //---------------slow case: call to native----------------- 379 __ bind(_entry); 380 __ mov(src()->as_register(), O0); 381 __ mov(src_pos()->as_register(), O1); 382 __ mov(dst()->as_register(), O2); 383 __ mov(dst_pos()->as_register(), O3); 384 __ mov(length()->as_register(), O4); 385 386 ce->emit_static_call_stub(); 387 388 __ call(SharedRuntime::get_resolve_static_call_stub(), relocInfo::static_call_type); 389 __ delayed()->nop(); 390 ce->add_call_info_here(info()); 391 ce->verify_oop_map(info()); 392 393 #ifndef PRODUCT 394 __ set((intptr_t)&Runtime1::_arraycopy_slowcase_cnt, O0); 395 __ ld(O0, 0, O1); 396 __ inc(O1); 397 __ st(O1, 0, O0); 398 #endif 399 400 __ br(Assembler::always, false, Assembler::pt, _continuation); 401 __ delayed()->nop(); 402 } 403 404 405 /////////////////////////////////////////////////////////////////////////////////// 406 #ifndef SERIALGC 407 408 void G1PreBarrierStub::emit_code(LIR_Assembler* ce) { 409 // At this point we know that marking is in progress. 410 // If do_load() is true then we have to emit the 411 // load of the previous value; otherwise it has already 412 // been loaded into _pre_val. 413 414 __ bind(_entry); 415 416 assert(pre_val()->is_register(), "Precondition."); 417 Register pre_val_reg = pre_val()->as_register(); 418 419 if (do_load()) { 420 ce->mem2reg(addr(), pre_val(), T_OBJECT, patch_code(), info(), false /*wide*/, false /*unaligned*/); 421 } 422 423 if (__ is_in_wdisp16_range(_continuation)) { 424 __ br_null(pre_val_reg, /*annul*/false, Assembler::pt, _continuation); 425 } else { 426 __ cmp(pre_val_reg, G0); 427 __ brx(Assembler::equal, false, Assembler::pn, _continuation); 428 } 429 __ delayed()->nop(); 430 431 __ call(Runtime1::entry_for(Runtime1::Runtime1::g1_pre_barrier_slow_id)); 432 __ delayed()->mov(pre_val_reg, G4); 433 __ br(Assembler::always, false, Assembler::pt, _continuation); 434 __ delayed()->nop(); 435 436 } 437 438 void G1UnsafeGetObjSATBBarrierStub::emit_code(LIR_Assembler* ce) { 439 // At this point we know that offset == referent_offset. 440 // 441 // So we might have to emit: 442 // if (src == null) goto continuation. 443 // 444 // and we definitely have to emit: 445 // if (klass(src).reference_type == REF_NONE) goto continuation 446 // if (!marking_active) goto continuation 447 // if (pre_val == null) goto continuation 448 // call pre_barrier(pre_val) 449 // goto continuation 450 // 451 __ bind(_entry); 452 453 assert(src()->is_register(), "sanity"); 454 Register src_reg = src()->as_register(); 455 456 if (gen_src_check()) { 457 // The original src operand was not a constant. 458 // Generate src == null? 459 if (__ is_in_wdisp16_range(_continuation)) { 460 __ br_null(src_reg, /*annul*/false, Assembler::pt, _continuation); 461 } else { 462 __ cmp(src_reg, G0); 463 __ brx(Assembler::equal, false, Assembler::pt, _continuation); 464 } 465 __ delayed()->nop(); 466 } 467 468 // Generate src->_klass->_reference_type() == REF_NONE)? 469 assert(tmp()->is_register(), "sanity"); 470 Register tmp_reg = tmp()->as_register(); 471 472 __ load_klass(src_reg, tmp_reg); 473 474 Address ref_type_adr(tmp_reg, instanceKlass::reference_type_offset_in_bytes() + sizeof(oopDesc)); 475 __ ld(ref_type_adr, tmp_reg); 476 477 // _reference_type field is of type ReferenceType (enum) 478 assert(REF_NONE == 0, "check this code"); 479 __ cmp_zero_and_br(Assembler::equal, tmp_reg, _continuation, /*annul*/false, Assembler::pt); 480 __ delayed()->nop(); 481 482 // Is marking active? 483 assert(thread()->is_register(), "precondition"); 484 Register thread_reg = thread()->as_pointer_register(); 485 486 Address in_progress(thread_reg, in_bytes(JavaThread::satb_mark_queue_offset() + 487 PtrQueue::byte_offset_of_active())); 488 489 if (in_bytes(PtrQueue::byte_width_of_active()) == 4) { 490 __ ld(in_progress, tmp_reg); 491 } else { 492 assert(in_bytes(PtrQueue::byte_width_of_active()) == 1, "Assumption"); 493 __ ldsb(in_progress, tmp_reg); 494 } 495 496 __ cmp_zero_and_br(Assembler::equal, tmp_reg, _continuation, /*annul*/false, Assembler::pt); 497 __ delayed()->nop(); 498 499 // val == null? 500 assert(val()->is_register(), "Precondition."); 501 Register val_reg = val()->as_register(); 502 503 if (__ is_in_wdisp16_range(_continuation)) { 504 __ br_null(val_reg, /*annul*/false, Assembler::pt, _continuation); 505 } else { 506 __ cmp(val_reg, G0); 507 __ brx(Assembler::equal, false, Assembler::pt, _continuation); 508 } 509 __ delayed()->nop(); 510 511 __ call(Runtime1::entry_for(Runtime1::Runtime1::g1_pre_barrier_slow_id)); 512 __ delayed()->mov(val_reg, G4); 513 __ br(Assembler::always, false, Assembler::pt, _continuation); 514 __ delayed()->nop(); 515 } 516 517 jbyte* G1PostBarrierStub::_byte_map_base = NULL; 518 519 jbyte* G1PostBarrierStub::byte_map_base_slow() { 520 BarrierSet* bs = Universe::heap()->barrier_set(); 521 assert(bs->is_a(BarrierSet::G1SATBCTLogging), 522 "Must be if we're using this."); 523 return ((G1SATBCardTableModRefBS*)bs)->byte_map_base; 524 } 525 526 void G1PostBarrierStub::emit_code(LIR_Assembler* ce) { 527 __ bind(_entry); 528 529 assert(addr()->is_register(), "Precondition."); 530 assert(new_val()->is_register(), "Precondition."); 531 Register addr_reg = addr()->as_pointer_register(); 532 Register new_val_reg = new_val()->as_register(); 533 534 if (__ is_in_wdisp16_range(_continuation)) { 535 __ br_null(new_val_reg, /*annul*/false, Assembler::pt, _continuation); 536 } else { 537 __ cmp(new_val_reg, G0); 538 __ brx(Assembler::equal, false, Assembler::pn, _continuation); 539 } 540 __ delayed()->nop(); 541 542 __ call(Runtime1::entry_for(Runtime1::Runtime1::g1_post_barrier_slow_id)); 543 __ delayed()->mov(addr_reg, G4); 544 __ br(Assembler::always, false, Assembler::pt, _continuation); 545 __ delayed()->nop(); 546 } 547 548 #endif // SERIALGC 549 /////////////////////////////////////////////////////////////////////////////////// 550 551 #undef __