1 //===-- Materializer.cpp ----------------------------------------*- C++ -*-===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 9 #include "lldb/Expression/Materializer.h" 10 #include "lldb/Core/DumpDataExtractor.h" 11 #include "lldb/Core/ValueObjectConstResult.h" 12 #include "lldb/Core/ValueObjectVariable.h" 13 #include "lldb/Expression/ExpressionVariable.h" 14 #include "lldb/Symbol/Symbol.h" 15 #include "lldb/Symbol/Type.h" 16 #include "lldb/Symbol/Variable.h" 17 #include "lldb/Target/ExecutionContext.h" 18 #include "lldb/Target/RegisterContext.h" 19 #include "lldb/Target/StackFrame.h" 20 #include "lldb/Target/Target.h" 21 #include "lldb/Target/Thread.h" 22 #include "lldb/Utility/Log.h" 23 #include "lldb/Utility/RegisterValue.h" 24 25 #include <memory> 26 27 using namespace lldb_private; 28 29 uint32_t Materializer::AddStructMember(Entity &entity) { 30 uint32_t size = entity.GetSize(); 31 uint32_t alignment = entity.GetAlignment(); 32 33 uint32_t ret; 34 35 if (m_current_offset == 0) 36 m_struct_alignment = alignment; 37 38 if (m_current_offset % alignment) 39 m_current_offset += (alignment - (m_current_offset % alignment)); 40 41 ret = m_current_offset; 42 43 m_current_offset += size; 44 45 return ret; 46 } 47 48 void Materializer::Entity::SetSizeAndAlignmentFromType(CompilerType &type) { 49 if (llvm::Optional<uint64_t> size = type.GetByteSize(nullptr)) 50 m_size = *size; 51 52 uint32_t bit_alignment = type.GetTypeBitAlign(); 53 54 if (bit_alignment % 8) { 55 bit_alignment += 8; 56 bit_alignment &= ~((uint32_t)0x111u); 57 } 58 59 m_alignment = bit_alignment / 8; 60 } 61 62 class EntityPersistentVariable : public Materializer::Entity { 63 public: 64 EntityPersistentVariable(lldb::ExpressionVariableSP &persistent_variable_sp, 65 Materializer::PersistentVariableDelegate *delegate) 66 : Entity(), m_persistent_variable_sp(persistent_variable_sp), 67 m_delegate(delegate) { 68 // Hard-coding to maximum size of a pointer since persistent variables are 69 // materialized by reference 70 m_size = 8; 71 m_alignment = 8; 72 } 73 74 void MakeAllocation(IRMemoryMap &map, Status &err) { 75 Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_EXPRESSIONS)); 76 77 // Allocate a spare memory area to store the persistent variable's 78 // contents. 79 80 Status allocate_error; 81 const bool zero_memory = false; 82 83 lldb::addr_t mem = map.Malloc( 84 m_persistent_variable_sp->GetByteSize(), 8, 85 lldb::ePermissionsReadable | lldb::ePermissionsWritable, 86 IRMemoryMap::eAllocationPolicyMirror, zero_memory, allocate_error); 87 88 if (!allocate_error.Success()) { 89 err.SetErrorStringWithFormat( 90 "couldn't allocate a memory area to store %s: %s", 91 m_persistent_variable_sp->GetName().GetCString(), 92 allocate_error.AsCString()); 93 return; 94 } 95 96 LLDB_LOGF(log, "Allocated %s (0x%" PRIx64 ") successfully", 97 m_persistent_variable_sp->GetName().GetCString(), mem); 98 99 // Put the location of the spare memory into the live data of the 100 // ValueObject. 101 102 m_persistent_variable_sp->m_live_sp = ValueObjectConstResult::Create( 103 map.GetBestExecutionContextScope(), 104 m_persistent_variable_sp->GetCompilerType(), 105 m_persistent_variable_sp->GetName(), mem, eAddressTypeLoad, 106 map.GetAddressByteSize()); 107 108 // Clear the flag if the variable will never be deallocated. 109 110 if (m_persistent_variable_sp->m_flags & 111 ExpressionVariable::EVKeepInTarget) { 112 Status leak_error; 113 map.Leak(mem, leak_error); 114 m_persistent_variable_sp->m_flags &= 115 ~ExpressionVariable::EVNeedsAllocation; 116 } 117 118 // Write the contents of the variable to the area. 119 120 Status write_error; 121 122 map.WriteMemory(mem, m_persistent_variable_sp->GetValueBytes(), 123 m_persistent_variable_sp->GetByteSize(), write_error); 124 125 if (!write_error.Success()) { 126 err.SetErrorStringWithFormat( 127 "couldn't write %s to the target: %s", 128 m_persistent_variable_sp->GetName().AsCString(), 129 write_error.AsCString()); 130 return; 131 } 132 } 133 134 void DestroyAllocation(IRMemoryMap &map, Status &err) { 135 Status deallocate_error; 136 137 map.Free((lldb::addr_t)m_persistent_variable_sp->m_live_sp->GetValue() 138 .GetScalar() 139 .ULongLong(), 140 deallocate_error); 141 142 m_persistent_variable_sp->m_live_sp.reset(); 143 144 if (!deallocate_error.Success()) { 145 err.SetErrorStringWithFormat( 146 "couldn't deallocate memory for %s: %s", 147 m_persistent_variable_sp->GetName().GetCString(), 148 deallocate_error.AsCString()); 149 } 150 } 151 152 void Materialize(lldb::StackFrameSP &frame_sp, IRMemoryMap &map, 153 lldb::addr_t process_address, Status &err) override { 154 Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_EXPRESSIONS)); 155 156 const lldb::addr_t load_addr = process_address + m_offset; 157 158 if (log) { 159 LLDB_LOGF(log, 160 "EntityPersistentVariable::Materialize [address = 0x%" PRIx64 161 ", m_name = %s, m_flags = 0x%hx]", 162 (uint64_t)load_addr, 163 m_persistent_variable_sp->GetName().AsCString(), 164 m_persistent_variable_sp->m_flags); 165 } 166 167 if (m_persistent_variable_sp->m_flags & 168 ExpressionVariable::EVNeedsAllocation) { 169 MakeAllocation(map, err); 170 m_persistent_variable_sp->m_flags |= 171 ExpressionVariable::EVIsLLDBAllocated; 172 173 if (!err.Success()) 174 return; 175 } 176 177 if ((m_persistent_variable_sp->m_flags & 178 ExpressionVariable::EVIsProgramReference && 179 m_persistent_variable_sp->m_live_sp) || 180 m_persistent_variable_sp->m_flags & 181 ExpressionVariable::EVIsLLDBAllocated) { 182 Status write_error; 183 184 map.WriteScalarToMemory( 185 load_addr, 186 m_persistent_variable_sp->m_live_sp->GetValue().GetScalar(), 187 map.GetAddressByteSize(), write_error); 188 189 if (!write_error.Success()) { 190 err.SetErrorStringWithFormat( 191 "couldn't write the location of %s to memory: %s", 192 m_persistent_variable_sp->GetName().AsCString(), 193 write_error.AsCString()); 194 } 195 } else { 196 err.SetErrorStringWithFormat( 197 "no materialization happened for persistent variable %s", 198 m_persistent_variable_sp->GetName().AsCString()); 199 return; 200 } 201 } 202 203 void Dematerialize(lldb::StackFrameSP &frame_sp, IRMemoryMap &map, 204 lldb::addr_t process_address, lldb::addr_t frame_top, 205 lldb::addr_t frame_bottom, Status &err) override { 206 Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_EXPRESSIONS)); 207 208 const lldb::addr_t load_addr = process_address + m_offset; 209 210 if (log) { 211 LLDB_LOGF(log, 212 "EntityPersistentVariable::Dematerialize [address = 0x%" PRIx64 213 ", m_name = %s, m_flags = 0x%hx]", 214 (uint64_t)process_address + m_offset, 215 m_persistent_variable_sp->GetName().AsCString(), 216 m_persistent_variable_sp->m_flags); 217 } 218 219 if (m_delegate) { 220 m_delegate->DidDematerialize(m_persistent_variable_sp); 221 } 222 223 if ((m_persistent_variable_sp->m_flags & 224 ExpressionVariable::EVIsLLDBAllocated) || 225 (m_persistent_variable_sp->m_flags & 226 ExpressionVariable::EVIsProgramReference)) { 227 if (m_persistent_variable_sp->m_flags & 228 ExpressionVariable::EVIsProgramReference && 229 !m_persistent_variable_sp->m_live_sp) { 230 // If the reference comes from the program, then the 231 // ClangExpressionVariable's live variable data hasn't been set up yet. 232 // Do this now. 233 234 lldb::addr_t location; 235 Status read_error; 236 237 map.ReadPointerFromMemory(&location, load_addr, read_error); 238 239 if (!read_error.Success()) { 240 err.SetErrorStringWithFormat( 241 "couldn't read the address of program-allocated variable %s: %s", 242 m_persistent_variable_sp->GetName().GetCString(), 243 read_error.AsCString()); 244 return; 245 } 246 247 m_persistent_variable_sp->m_live_sp = ValueObjectConstResult::Create( 248 map.GetBestExecutionContextScope(), 249 m_persistent_variable_sp.get()->GetCompilerType(), 250 m_persistent_variable_sp->GetName(), location, eAddressTypeLoad, 251 m_persistent_variable_sp->GetByteSize()); 252 253 if (frame_top != LLDB_INVALID_ADDRESS && 254 frame_bottom != LLDB_INVALID_ADDRESS && location >= frame_bottom && 255 location <= frame_top) { 256 // If the variable is resident in the stack frame created by the 257 // expression, then it cannot be relied upon to stay around. We 258 // treat it as needing reallocation. 259 m_persistent_variable_sp->m_flags |= 260 ExpressionVariable::EVIsLLDBAllocated; 261 m_persistent_variable_sp->m_flags |= 262 ExpressionVariable::EVNeedsAllocation; 263 m_persistent_variable_sp->m_flags |= 264 ExpressionVariable::EVNeedsFreezeDry; 265 m_persistent_variable_sp->m_flags &= 266 ~ExpressionVariable::EVIsProgramReference; 267 } 268 } 269 270 lldb::addr_t mem = m_persistent_variable_sp->m_live_sp->GetValue() 271 .GetScalar() 272 .ULongLong(); 273 274 if (!m_persistent_variable_sp->m_live_sp) { 275 err.SetErrorStringWithFormat( 276 "couldn't find the memory area used to store %s", 277 m_persistent_variable_sp->GetName().GetCString()); 278 return; 279 } 280 281 if (m_persistent_variable_sp->m_live_sp->GetValue() 282 .GetValueAddressType() != eAddressTypeLoad) { 283 err.SetErrorStringWithFormat( 284 "the address of the memory area for %s is in an incorrect format", 285 m_persistent_variable_sp->GetName().GetCString()); 286 return; 287 } 288 289 if (m_persistent_variable_sp->m_flags & 290 ExpressionVariable::EVNeedsFreezeDry || 291 m_persistent_variable_sp->m_flags & 292 ExpressionVariable::EVKeepInTarget) { 293 LLDB_LOGF(log, "Dematerializing %s from 0x%" PRIx64 " (size = %llu)", 294 m_persistent_variable_sp->GetName().GetCString(), 295 (uint64_t)mem, 296 (unsigned long long)m_persistent_variable_sp->GetByteSize()); 297 298 // Read the contents of the spare memory area 299 300 m_persistent_variable_sp->ValueUpdated(); 301 302 Status read_error; 303 304 map.ReadMemory(m_persistent_variable_sp->GetValueBytes(), mem, 305 m_persistent_variable_sp->GetByteSize(), read_error); 306 307 if (!read_error.Success()) { 308 err.SetErrorStringWithFormat( 309 "couldn't read the contents of %s from memory: %s", 310 m_persistent_variable_sp->GetName().GetCString(), 311 read_error.AsCString()); 312 return; 313 } 314 315 m_persistent_variable_sp->m_flags &= 316 ~ExpressionVariable::EVNeedsFreezeDry; 317 } 318 } else { 319 err.SetErrorStringWithFormat( 320 "no dematerialization happened for persistent variable %s", 321 m_persistent_variable_sp->GetName().AsCString()); 322 return; 323 } 324 325 lldb::ProcessSP process_sp = 326 map.GetBestExecutionContextScope()->CalculateProcess(); 327 if (!process_sp || !process_sp->CanJIT()) { 328 // Allocations are not persistent so persistent variables cannot stay 329 // materialized. 330 331 m_persistent_variable_sp->m_flags |= 332 ExpressionVariable::EVNeedsAllocation; 333 334 DestroyAllocation(map, err); 335 if (!err.Success()) 336 return; 337 } else if (m_persistent_variable_sp->m_flags & 338 ExpressionVariable::EVNeedsAllocation && 339 !(m_persistent_variable_sp->m_flags & 340 ExpressionVariable::EVKeepInTarget)) { 341 DestroyAllocation(map, err); 342 if (!err.Success()) 343 return; 344 } 345 } 346 347 void DumpToLog(IRMemoryMap &map, lldb::addr_t process_address, 348 Log *log) override { 349 StreamString dump_stream; 350 351 Status err; 352 353 const lldb::addr_t load_addr = process_address + m_offset; 354 355 dump_stream.Printf("0x%" PRIx64 ": EntityPersistentVariable (%s)\n", 356 load_addr, 357 m_persistent_variable_sp->GetName().AsCString()); 358 359 { 360 dump_stream.Printf("Pointer:\n"); 361 362 DataBufferHeap data(m_size, 0); 363 364 map.ReadMemory(data.GetBytes(), load_addr, m_size, err); 365 366 if (!err.Success()) { 367 dump_stream.Printf(" <could not be read>\n"); 368 } else { 369 DumpHexBytes(&dump_stream, data.GetBytes(), data.GetByteSize(), 16, 370 load_addr); 371 372 dump_stream.PutChar('\n'); 373 } 374 } 375 376 { 377 dump_stream.Printf("Target:\n"); 378 379 lldb::addr_t target_address; 380 381 map.ReadPointerFromMemory(&target_address, load_addr, err); 382 383 if (!err.Success()) { 384 dump_stream.Printf(" <could not be read>\n"); 385 } else { 386 DataBufferHeap data(m_persistent_variable_sp->GetByteSize(), 0); 387 388 map.ReadMemory(data.GetBytes(), target_address, 389 m_persistent_variable_sp->GetByteSize(), err); 390 391 if (!err.Success()) { 392 dump_stream.Printf(" <could not be read>\n"); 393 } else { 394 DumpHexBytes(&dump_stream, data.GetBytes(), data.GetByteSize(), 16, 395 target_address); 396 397 dump_stream.PutChar('\n'); 398 } 399 } 400 } 401 402 log->PutString(dump_stream.GetString()); 403 } 404 405 void Wipe(IRMemoryMap &map, lldb::addr_t process_address) override {} 406 407 private: 408 lldb::ExpressionVariableSP m_persistent_variable_sp; 409 Materializer::PersistentVariableDelegate *m_delegate; 410 }; 411 412 uint32_t Materializer::AddPersistentVariable( 413 lldb::ExpressionVariableSP &persistent_variable_sp, 414 PersistentVariableDelegate *delegate, Status &err) { 415 EntityVector::iterator iter = m_entities.insert(m_entities.end(), EntityUP()); 416 iter->reset(new EntityPersistentVariable(persistent_variable_sp, delegate)); 417 uint32_t ret = AddStructMember(**iter); 418 (*iter)->SetOffset(ret); 419 return ret; 420 } 421 422 class EntityVariable : public Materializer::Entity { 423 public: 424 EntityVariable(lldb::VariableSP &variable_sp) 425 : Entity(), m_variable_sp(variable_sp), m_is_reference(false), 426 m_temporary_allocation(LLDB_INVALID_ADDRESS), 427 m_temporary_allocation_size(0) { 428 // Hard-coding to maximum size of a pointer since all variables are 429 // materialized by reference 430 m_size = 8; 431 m_alignment = 8; 432 m_is_reference = 433 m_variable_sp->GetType()->GetForwardCompilerType().IsReferenceType(); 434 } 435 436 void Materialize(lldb::StackFrameSP &frame_sp, IRMemoryMap &map, 437 lldb::addr_t process_address, Status &err) override { 438 Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_EXPRESSIONS)); 439 440 const lldb::addr_t load_addr = process_address + m_offset; 441 if (log) { 442 LLDB_LOGF(log, 443 "EntityVariable::Materialize [address = 0x%" PRIx64 444 ", m_variable_sp = %s]", 445 (uint64_t)load_addr, m_variable_sp->GetName().AsCString()); 446 } 447 448 ExecutionContextScope *scope = frame_sp.get(); 449 450 if (!scope) 451 scope = map.GetBestExecutionContextScope(); 452 453 lldb::ValueObjectSP valobj_sp = 454 ValueObjectVariable::Create(scope, m_variable_sp); 455 456 if (!valobj_sp) { 457 err.SetErrorStringWithFormat( 458 "couldn't get a value object for variable %s", 459 m_variable_sp->GetName().AsCString()); 460 return; 461 } 462 463 Status valobj_error = valobj_sp->GetError(); 464 465 if (valobj_error.Fail()) { 466 err.SetErrorStringWithFormat("couldn't get the value of variable %s: %s", 467 m_variable_sp->GetName().AsCString(), 468 valobj_error.AsCString()); 469 return; 470 } 471 472 if (m_is_reference) { 473 DataExtractor valobj_extractor; 474 Status extract_error; 475 valobj_sp->GetData(valobj_extractor, extract_error); 476 477 if (!extract_error.Success()) { 478 err.SetErrorStringWithFormat( 479 "couldn't read contents of reference variable %s: %s", 480 m_variable_sp->GetName().AsCString(), extract_error.AsCString()); 481 return; 482 } 483 484 lldb::offset_t offset = 0; 485 lldb::addr_t reference_addr = valobj_extractor.GetAddress(&offset); 486 487 Status write_error; 488 map.WritePointerToMemory(load_addr, reference_addr, write_error); 489 490 if (!write_error.Success()) { 491 err.SetErrorStringWithFormat("couldn't write the contents of reference " 492 "variable %s to memory: %s", 493 m_variable_sp->GetName().AsCString(), 494 write_error.AsCString()); 495 return; 496 } 497 } else { 498 AddressType address_type = eAddressTypeInvalid; 499 const bool scalar_is_load_address = false; 500 lldb::addr_t addr_of_valobj = 501 valobj_sp->GetAddressOf(scalar_is_load_address, &address_type); 502 if (addr_of_valobj != LLDB_INVALID_ADDRESS) { 503 Status write_error; 504 map.WritePointerToMemory(load_addr, addr_of_valobj, write_error); 505 506 if (!write_error.Success()) { 507 err.SetErrorStringWithFormat( 508 "couldn't write the address of variable %s to memory: %s", 509 m_variable_sp->GetName().AsCString(), write_error.AsCString()); 510 return; 511 } 512 } else { 513 DataExtractor data; 514 Status extract_error; 515 valobj_sp->GetData(data, extract_error); 516 if (!extract_error.Success()) { 517 err.SetErrorStringWithFormat("couldn't get the value of %s: %s", 518 m_variable_sp->GetName().AsCString(), 519 extract_error.AsCString()); 520 return; 521 } 522 523 if (m_temporary_allocation != LLDB_INVALID_ADDRESS) { 524 err.SetErrorStringWithFormat( 525 "trying to create a temporary region for %s but one exists", 526 m_variable_sp->GetName().AsCString()); 527 return; 528 } 529 530 if (data.GetByteSize() < m_variable_sp->GetType()->GetByteSize()) { 531 if (data.GetByteSize() == 0 && 532 !m_variable_sp->LocationExpression().IsValid()) { 533 err.SetErrorStringWithFormat("the variable '%s' has no location, " 534 "it may have been optimized out", 535 m_variable_sp->GetName().AsCString()); 536 } else { 537 err.SetErrorStringWithFormat( 538 "size of variable %s (%" PRIu64 539 ") is larger than the ValueObject's size (%" PRIu64 ")", 540 m_variable_sp->GetName().AsCString(), 541 m_variable_sp->GetType()->GetByteSize().getValueOr(0), 542 data.GetByteSize()); 543 } 544 return; 545 } 546 547 size_t bit_align = 548 m_variable_sp->GetType()->GetLayoutCompilerType().GetTypeBitAlign(); 549 size_t byte_align = (bit_align + 7) / 8; 550 551 if (!byte_align) 552 byte_align = 1; 553 554 Status alloc_error; 555 const bool zero_memory = false; 556 557 m_temporary_allocation = map.Malloc( 558 data.GetByteSize(), byte_align, 559 lldb::ePermissionsReadable | lldb::ePermissionsWritable, 560 IRMemoryMap::eAllocationPolicyMirror, zero_memory, alloc_error); 561 562 m_temporary_allocation_size = data.GetByteSize(); 563 564 m_original_data = std::make_shared<DataBufferHeap>(data.GetDataStart(), 565 data.GetByteSize()); 566 567 if (!alloc_error.Success()) { 568 err.SetErrorStringWithFormat( 569 "couldn't allocate a temporary region for %s: %s", 570 m_variable_sp->GetName().AsCString(), alloc_error.AsCString()); 571 return; 572 } 573 574 Status write_error; 575 576 map.WriteMemory(m_temporary_allocation, data.GetDataStart(), 577 data.GetByteSize(), write_error); 578 579 if (!write_error.Success()) { 580 err.SetErrorStringWithFormat( 581 "couldn't write to the temporary region for %s: %s", 582 m_variable_sp->GetName().AsCString(), write_error.AsCString()); 583 return; 584 } 585 586 Status pointer_write_error; 587 588 map.WritePointerToMemory(load_addr, m_temporary_allocation, 589 pointer_write_error); 590 591 if (!pointer_write_error.Success()) { 592 err.SetErrorStringWithFormat( 593 "couldn't write the address of the temporary region for %s: %s", 594 m_variable_sp->GetName().AsCString(), 595 pointer_write_error.AsCString()); 596 } 597 } 598 } 599 } 600 601 void Dematerialize(lldb::StackFrameSP &frame_sp, IRMemoryMap &map, 602 lldb::addr_t process_address, lldb::addr_t frame_top, 603 lldb::addr_t frame_bottom, Status &err) override { 604 Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_EXPRESSIONS)); 605 606 const lldb::addr_t load_addr = process_address + m_offset; 607 if (log) { 608 LLDB_LOGF(log, 609 "EntityVariable::Dematerialize [address = 0x%" PRIx64 610 ", m_variable_sp = %s]", 611 (uint64_t)load_addr, m_variable_sp->GetName().AsCString()); 612 } 613 614 if (m_temporary_allocation != LLDB_INVALID_ADDRESS) { 615 ExecutionContextScope *scope = frame_sp.get(); 616 617 if (!scope) 618 scope = map.GetBestExecutionContextScope(); 619 620 lldb::ValueObjectSP valobj_sp = 621 ValueObjectVariable::Create(scope, m_variable_sp); 622 623 if (!valobj_sp) { 624 err.SetErrorStringWithFormat( 625 "couldn't get a value object for variable %s", 626 m_variable_sp->GetName().AsCString()); 627 return; 628 } 629 630 lldb_private::DataExtractor data; 631 632 Status extract_error; 633 634 map.GetMemoryData(data, m_temporary_allocation, valobj_sp->GetByteSize(), 635 extract_error); 636 637 if (!extract_error.Success()) { 638 err.SetErrorStringWithFormat("couldn't get the data for variable %s", 639 m_variable_sp->GetName().AsCString()); 640 return; 641 } 642 643 bool actually_write = true; 644 645 if (m_original_data) { 646 if ((data.GetByteSize() == m_original_data->GetByteSize()) && 647 !memcmp(m_original_data->GetBytes(), data.GetDataStart(), 648 data.GetByteSize())) { 649 actually_write = false; 650 } 651 } 652 653 Status set_error; 654 655 if (actually_write) { 656 valobj_sp->SetData(data, set_error); 657 658 if (!set_error.Success()) { 659 err.SetErrorStringWithFormat( 660 "couldn't write the new contents of %s back into the variable", 661 m_variable_sp->GetName().AsCString()); 662 return; 663 } 664 } 665 666 Status free_error; 667 668 map.Free(m_temporary_allocation, free_error); 669 670 if (!free_error.Success()) { 671 err.SetErrorStringWithFormat( 672 "couldn't free the temporary region for %s: %s", 673 m_variable_sp->GetName().AsCString(), free_error.AsCString()); 674 return; 675 } 676 677 m_original_data.reset(); 678 m_temporary_allocation = LLDB_INVALID_ADDRESS; 679 m_temporary_allocation_size = 0; 680 } 681 } 682 683 void DumpToLog(IRMemoryMap &map, lldb::addr_t process_address, 684 Log *log) override { 685 StreamString dump_stream; 686 687 const lldb::addr_t load_addr = process_address + m_offset; 688 dump_stream.Printf("0x%" PRIx64 ": EntityVariable\n", load_addr); 689 690 Status err; 691 692 lldb::addr_t ptr = LLDB_INVALID_ADDRESS; 693 694 { 695 dump_stream.Printf("Pointer:\n"); 696 697 DataBufferHeap data(m_size, 0); 698 699 map.ReadMemory(data.GetBytes(), load_addr, m_size, err); 700 701 if (!err.Success()) { 702 dump_stream.Printf(" <could not be read>\n"); 703 } else { 704 DataExtractor extractor(data.GetBytes(), data.GetByteSize(), 705 map.GetByteOrder(), map.GetAddressByteSize()); 706 707 DumpHexBytes(&dump_stream, data.GetBytes(), data.GetByteSize(), 16, 708 load_addr); 709 710 lldb::offset_t offset; 711 712 ptr = extractor.GetPointer(&offset); 713 714 dump_stream.PutChar('\n'); 715 } 716 } 717 718 if (m_temporary_allocation == LLDB_INVALID_ADDRESS) { 719 dump_stream.Printf("Points to process memory:\n"); 720 } else { 721 dump_stream.Printf("Temporary allocation:\n"); 722 } 723 724 if (ptr == LLDB_INVALID_ADDRESS) { 725 dump_stream.Printf(" <could not be be found>\n"); 726 } else { 727 DataBufferHeap data(m_temporary_allocation_size, 0); 728 729 map.ReadMemory(data.GetBytes(), m_temporary_allocation, 730 m_temporary_allocation_size, err); 731 732 if (!err.Success()) { 733 dump_stream.Printf(" <could not be read>\n"); 734 } else { 735 DumpHexBytes(&dump_stream, data.GetBytes(), data.GetByteSize(), 16, 736 load_addr); 737 738 dump_stream.PutChar('\n'); 739 } 740 } 741 742 log->PutString(dump_stream.GetString()); 743 } 744 745 void Wipe(IRMemoryMap &map, lldb::addr_t process_address) override { 746 if (m_temporary_allocation != LLDB_INVALID_ADDRESS) { 747 Status free_error; 748 749 map.Free(m_temporary_allocation, free_error); 750 751 m_temporary_allocation = LLDB_INVALID_ADDRESS; 752 m_temporary_allocation_size = 0; 753 } 754 } 755 756 private: 757 lldb::VariableSP m_variable_sp; 758 bool m_is_reference; 759 lldb::addr_t m_temporary_allocation; 760 size_t m_temporary_allocation_size; 761 lldb::DataBufferSP m_original_data; 762 }; 763 764 uint32_t Materializer::AddVariable(lldb::VariableSP &variable_sp, Status &err) { 765 EntityVector::iterator iter = m_entities.insert(m_entities.end(), EntityUP()); 766 iter->reset(new EntityVariable(variable_sp)); 767 uint32_t ret = AddStructMember(**iter); 768 (*iter)->SetOffset(ret); 769 return ret; 770 } 771 772 class EntityResultVariable : public Materializer::Entity { 773 public: 774 EntityResultVariable(const CompilerType &type, bool is_program_reference, 775 bool keep_in_memory, 776 Materializer::PersistentVariableDelegate *delegate) 777 : Entity(), m_type(type), m_is_program_reference(is_program_reference), 778 m_keep_in_memory(keep_in_memory), 779 m_temporary_allocation(LLDB_INVALID_ADDRESS), 780 m_temporary_allocation_size(0), m_delegate(delegate) { 781 // Hard-coding to maximum size of a pointer since all results are 782 // materialized by reference 783 m_size = 8; 784 m_alignment = 8; 785 } 786 787 void Materialize(lldb::StackFrameSP &frame_sp, IRMemoryMap &map, 788 lldb::addr_t process_address, Status &err) override { 789 if (!m_is_program_reference) { 790 if (m_temporary_allocation != LLDB_INVALID_ADDRESS) { 791 err.SetErrorString("Trying to create a temporary region for the result " 792 "but one exists"); 793 return; 794 } 795 796 const lldb::addr_t load_addr = process_address + m_offset; 797 798 ExecutionContextScope *exe_scope = map.GetBestExecutionContextScope(); 799 800 llvm::Optional<uint64_t> byte_size = m_type.GetByteSize(exe_scope); 801 if (!byte_size) { 802 err.SetErrorString("can't get size of type"); 803 return; 804 } 805 size_t bit_align = m_type.GetTypeBitAlign(); 806 size_t byte_align = (bit_align + 7) / 8; 807 808 if (!byte_align) 809 byte_align = 1; 810 811 Status alloc_error; 812 const bool zero_memory = true; 813 814 m_temporary_allocation = map.Malloc( 815 *byte_size, byte_align, 816 lldb::ePermissionsReadable | lldb::ePermissionsWritable, 817 IRMemoryMap::eAllocationPolicyMirror, zero_memory, alloc_error); 818 m_temporary_allocation_size = *byte_size; 819 820 if (!alloc_error.Success()) { 821 err.SetErrorStringWithFormat( 822 "couldn't allocate a temporary region for the result: %s", 823 alloc_error.AsCString()); 824 return; 825 } 826 827 Status pointer_write_error; 828 829 map.WritePointerToMemory(load_addr, m_temporary_allocation, 830 pointer_write_error); 831 832 if (!pointer_write_error.Success()) { 833 err.SetErrorStringWithFormat("couldn't write the address of the " 834 "temporary region for the result: %s", 835 pointer_write_error.AsCString()); 836 } 837 } 838 } 839 840 void Dematerialize(lldb::StackFrameSP &frame_sp, IRMemoryMap &map, 841 lldb::addr_t process_address, lldb::addr_t frame_top, 842 lldb::addr_t frame_bottom, Status &err) override { 843 err.Clear(); 844 845 ExecutionContextScope *exe_scope = map.GetBestExecutionContextScope(); 846 847 if (!exe_scope) { 848 err.SetErrorString("Couldn't dematerialize a result variable: invalid " 849 "execution context scope"); 850 return; 851 } 852 853 lldb::addr_t address; 854 Status read_error; 855 const lldb::addr_t load_addr = process_address + m_offset; 856 857 map.ReadPointerFromMemory(&address, load_addr, read_error); 858 859 if (!read_error.Success()) { 860 err.SetErrorString("Couldn't dematerialize a result variable: couldn't " 861 "read its address"); 862 return; 863 } 864 865 lldb::TargetSP target_sp = exe_scope->CalculateTarget(); 866 867 if (!target_sp) { 868 err.SetErrorString("Couldn't dematerialize a result variable: no target"); 869 return; 870 } 871 872 auto type_system_or_err = 873 target_sp->GetScratchTypeSystemForLanguage(m_type.GetMinimumLanguage()); 874 875 if (auto error = type_system_or_err.takeError()) { 876 err.SetErrorStringWithFormat("Couldn't dematerialize a result variable: " 877 "couldn't get the corresponding type " 878 "system: %s", 879 llvm::toString(std::move(error)).c_str()); 880 return; 881 } 882 PersistentExpressionState *persistent_state = 883 type_system_or_err->GetPersistentExpressionState(); 884 885 if (!persistent_state) { 886 err.SetErrorString("Couldn't dematerialize a result variable: " 887 "corresponding type system doesn't handle persistent " 888 "variables"); 889 return; 890 } 891 892 ConstString name = 893 m_delegate 894 ? m_delegate->GetName() 895 : persistent_state->GetNextPersistentVariableName( 896 *target_sp, persistent_state->GetPersistentVariablePrefix()); 897 898 lldb::ExpressionVariableSP ret = persistent_state->CreatePersistentVariable( 899 exe_scope, name, m_type, map.GetByteOrder(), map.GetAddressByteSize()); 900 901 if (!ret) { 902 err.SetErrorStringWithFormat("couldn't dematerialize a result variable: " 903 "failed to make persistent variable %s", 904 name.AsCString()); 905 return; 906 } 907 908 lldb::ProcessSP process_sp = 909 map.GetBestExecutionContextScope()->CalculateProcess(); 910 911 if (m_delegate) { 912 m_delegate->DidDematerialize(ret); 913 } 914 915 bool can_persist = 916 (m_is_program_reference && process_sp && process_sp->CanJIT() && 917 !(address >= frame_bottom && address < frame_top)); 918 919 if (can_persist && m_keep_in_memory) { 920 ret->m_live_sp = ValueObjectConstResult::Create(exe_scope, m_type, name, 921 address, eAddressTypeLoad, 922 map.GetAddressByteSize()); 923 } 924 925 ret->ValueUpdated(); 926 927 const size_t pvar_byte_size = ret->GetByteSize(); 928 uint8_t *pvar_data = ret->GetValueBytes(); 929 930 map.ReadMemory(pvar_data, address, pvar_byte_size, read_error); 931 932 if (!read_error.Success()) { 933 err.SetErrorString( 934 "Couldn't dematerialize a result variable: couldn't read its memory"); 935 return; 936 } 937 938 if (!can_persist || !m_keep_in_memory) { 939 ret->m_flags |= ExpressionVariable::EVNeedsAllocation; 940 941 if (m_temporary_allocation != LLDB_INVALID_ADDRESS) { 942 Status free_error; 943 map.Free(m_temporary_allocation, free_error); 944 } 945 } else { 946 ret->m_flags |= ExpressionVariable::EVIsLLDBAllocated; 947 } 948 949 m_temporary_allocation = LLDB_INVALID_ADDRESS; 950 m_temporary_allocation_size = 0; 951 } 952 953 void DumpToLog(IRMemoryMap &map, lldb::addr_t process_address, 954 Log *log) override { 955 StreamString dump_stream; 956 957 const lldb::addr_t load_addr = process_address + m_offset; 958 959 dump_stream.Printf("0x%" PRIx64 ": EntityResultVariable\n", load_addr); 960 961 Status err; 962 963 lldb::addr_t ptr = LLDB_INVALID_ADDRESS; 964 965 { 966 dump_stream.Printf("Pointer:\n"); 967 968 DataBufferHeap data(m_size, 0); 969 970 map.ReadMemory(data.GetBytes(), load_addr, m_size, err); 971 972 if (!err.Success()) { 973 dump_stream.Printf(" <could not be read>\n"); 974 } else { 975 DataExtractor extractor(data.GetBytes(), data.GetByteSize(), 976 map.GetByteOrder(), map.GetAddressByteSize()); 977 978 DumpHexBytes(&dump_stream, data.GetBytes(), data.GetByteSize(), 16, 979 load_addr); 980 981 lldb::offset_t offset; 982 983 ptr = extractor.GetPointer(&offset); 984 985 dump_stream.PutChar('\n'); 986 } 987 } 988 989 if (m_temporary_allocation == LLDB_INVALID_ADDRESS) { 990 dump_stream.Printf("Points to process memory:\n"); 991 } else { 992 dump_stream.Printf("Temporary allocation:\n"); 993 } 994 995 if (ptr == LLDB_INVALID_ADDRESS) { 996 dump_stream.Printf(" <could not be be found>\n"); 997 } else { 998 DataBufferHeap data(m_temporary_allocation_size, 0); 999 1000 map.ReadMemory(data.GetBytes(), m_temporary_allocation, 1001 m_temporary_allocation_size, err); 1002 1003 if (!err.Success()) { 1004 dump_stream.Printf(" <could not be read>\n"); 1005 } else { 1006 DumpHexBytes(&dump_stream, data.GetBytes(), data.GetByteSize(), 16, 1007 load_addr); 1008 1009 dump_stream.PutChar('\n'); 1010 } 1011 } 1012 1013 log->PutString(dump_stream.GetString()); 1014 } 1015 1016 void Wipe(IRMemoryMap &map, lldb::addr_t process_address) override { 1017 if (!m_keep_in_memory && m_temporary_allocation != LLDB_INVALID_ADDRESS) { 1018 Status free_error; 1019 1020 map.Free(m_temporary_allocation, free_error); 1021 } 1022 1023 m_temporary_allocation = LLDB_INVALID_ADDRESS; 1024 m_temporary_allocation_size = 0; 1025 } 1026 1027 private: 1028 CompilerType m_type; 1029 bool m_is_program_reference; 1030 bool m_keep_in_memory; 1031 1032 lldb::addr_t m_temporary_allocation; 1033 size_t m_temporary_allocation_size; 1034 Materializer::PersistentVariableDelegate *m_delegate; 1035 }; 1036 1037 uint32_t Materializer::AddResultVariable(const CompilerType &type, 1038 bool is_program_reference, 1039 bool keep_in_memory, 1040 PersistentVariableDelegate *delegate, 1041 Status &err) { 1042 EntityVector::iterator iter = m_entities.insert(m_entities.end(), EntityUP()); 1043 iter->reset(new EntityResultVariable(type, is_program_reference, 1044 keep_in_memory, delegate)); 1045 uint32_t ret = AddStructMember(**iter); 1046 (*iter)->SetOffset(ret); 1047 return ret; 1048 } 1049 1050 class EntitySymbol : public Materializer::Entity { 1051 public: 1052 EntitySymbol(const Symbol &symbol) : Entity(), m_symbol(symbol) { 1053 // Hard-coding to maximum size of a symbol 1054 m_size = 8; 1055 m_alignment = 8; 1056 } 1057 1058 void Materialize(lldb::StackFrameSP &frame_sp, IRMemoryMap &map, 1059 lldb::addr_t process_address, Status &err) override { 1060 Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_EXPRESSIONS)); 1061 1062 const lldb::addr_t load_addr = process_address + m_offset; 1063 1064 if (log) { 1065 LLDB_LOGF(log, 1066 "EntitySymbol::Materialize [address = 0x%" PRIx64 1067 ", m_symbol = %s]", 1068 (uint64_t)load_addr, m_symbol.GetName().AsCString()); 1069 } 1070 1071 const Address sym_address = m_symbol.GetAddress(); 1072 1073 ExecutionContextScope *exe_scope = map.GetBestExecutionContextScope(); 1074 1075 lldb::TargetSP target_sp; 1076 1077 if (exe_scope) 1078 target_sp = map.GetBestExecutionContextScope()->CalculateTarget(); 1079 1080 if (!target_sp) { 1081 err.SetErrorStringWithFormat( 1082 "couldn't resolve symbol %s because there is no target", 1083 m_symbol.GetName().AsCString()); 1084 return; 1085 } 1086 1087 lldb::addr_t resolved_address = sym_address.GetLoadAddress(target_sp.get()); 1088 1089 if (resolved_address == LLDB_INVALID_ADDRESS) 1090 resolved_address = sym_address.GetFileAddress(); 1091 1092 Status pointer_write_error; 1093 1094 map.WritePointerToMemory(load_addr, resolved_address, pointer_write_error); 1095 1096 if (!pointer_write_error.Success()) { 1097 err.SetErrorStringWithFormat( 1098 "couldn't write the address of symbol %s: %s", 1099 m_symbol.GetName().AsCString(), pointer_write_error.AsCString()); 1100 return; 1101 } 1102 } 1103 1104 void Dematerialize(lldb::StackFrameSP &frame_sp, IRMemoryMap &map, 1105 lldb::addr_t process_address, lldb::addr_t frame_top, 1106 lldb::addr_t frame_bottom, Status &err) override { 1107 Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_EXPRESSIONS)); 1108 1109 const lldb::addr_t load_addr = process_address + m_offset; 1110 1111 if (log) { 1112 LLDB_LOGF(log, 1113 "EntitySymbol::Dematerialize [address = 0x%" PRIx64 1114 ", m_symbol = %s]", 1115 (uint64_t)load_addr, m_symbol.GetName().AsCString()); 1116 } 1117 1118 // no work needs to be done 1119 } 1120 1121 void DumpToLog(IRMemoryMap &map, lldb::addr_t process_address, 1122 Log *log) override { 1123 StreamString dump_stream; 1124 1125 Status err; 1126 1127 const lldb::addr_t load_addr = process_address + m_offset; 1128 1129 dump_stream.Printf("0x%" PRIx64 ": EntitySymbol (%s)\n", load_addr, 1130 m_symbol.GetName().AsCString()); 1131 1132 { 1133 dump_stream.Printf("Pointer:\n"); 1134 1135 DataBufferHeap data(m_size, 0); 1136 1137 map.ReadMemory(data.GetBytes(), load_addr, m_size, err); 1138 1139 if (!err.Success()) { 1140 dump_stream.Printf(" <could not be read>\n"); 1141 } else { 1142 DumpHexBytes(&dump_stream, data.GetBytes(), data.GetByteSize(), 16, 1143 load_addr); 1144 1145 dump_stream.PutChar('\n'); 1146 } 1147 } 1148 1149 log->PutString(dump_stream.GetString()); 1150 } 1151 1152 void Wipe(IRMemoryMap &map, lldb::addr_t process_address) override {} 1153 1154 private: 1155 Symbol m_symbol; 1156 }; 1157 1158 uint32_t Materializer::AddSymbol(const Symbol &symbol_sp, Status &err) { 1159 EntityVector::iterator iter = m_entities.insert(m_entities.end(), EntityUP()); 1160 iter->reset(new EntitySymbol(symbol_sp)); 1161 uint32_t ret = AddStructMember(**iter); 1162 (*iter)->SetOffset(ret); 1163 return ret; 1164 } 1165 1166 class EntityRegister : public Materializer::Entity { 1167 public: 1168 EntityRegister(const RegisterInfo ®ister_info) 1169 : Entity(), m_register_info(register_info) { 1170 // Hard-coding alignment conservatively 1171 m_size = m_register_info.byte_size; 1172 m_alignment = m_register_info.byte_size; 1173 } 1174 1175 void Materialize(lldb::StackFrameSP &frame_sp, IRMemoryMap &map, 1176 lldb::addr_t process_address, Status &err) override { 1177 Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_EXPRESSIONS)); 1178 1179 const lldb::addr_t load_addr = process_address + m_offset; 1180 1181 if (log) { 1182 LLDB_LOGF(log, 1183 "EntityRegister::Materialize [address = 0x%" PRIx64 1184 ", m_register_info = %s]", 1185 (uint64_t)load_addr, m_register_info.name); 1186 } 1187 1188 RegisterValue reg_value; 1189 1190 if (!frame_sp.get()) { 1191 err.SetErrorStringWithFormat( 1192 "couldn't materialize register %s without a stack frame", 1193 m_register_info.name); 1194 return; 1195 } 1196 1197 lldb::RegisterContextSP reg_context_sp = frame_sp->GetRegisterContext(); 1198 1199 if (!reg_context_sp->ReadRegister(&m_register_info, reg_value)) { 1200 err.SetErrorStringWithFormat("couldn't read the value of register %s", 1201 m_register_info.name); 1202 return; 1203 } 1204 1205 DataExtractor register_data; 1206 1207 if (!reg_value.GetData(register_data)) { 1208 err.SetErrorStringWithFormat("couldn't get the data for register %s", 1209 m_register_info.name); 1210 return; 1211 } 1212 1213 if (register_data.GetByteSize() != m_register_info.byte_size) { 1214 err.SetErrorStringWithFormat( 1215 "data for register %s had size %llu but we expected %llu", 1216 m_register_info.name, (unsigned long long)register_data.GetByteSize(), 1217 (unsigned long long)m_register_info.byte_size); 1218 return; 1219 } 1220 1221 m_register_contents = std::make_shared<DataBufferHeap>( 1222 register_data.GetDataStart(), register_data.GetByteSize()); 1223 1224 Status write_error; 1225 1226 map.WriteMemory(load_addr, register_data.GetDataStart(), 1227 register_data.GetByteSize(), write_error); 1228 1229 if (!write_error.Success()) { 1230 err.SetErrorStringWithFormat( 1231 "couldn't write the contents of register %s: %s", 1232 m_register_info.name, write_error.AsCString()); 1233 return; 1234 } 1235 } 1236 1237 void Dematerialize(lldb::StackFrameSP &frame_sp, IRMemoryMap &map, 1238 lldb::addr_t process_address, lldb::addr_t frame_top, 1239 lldb::addr_t frame_bottom, Status &err) override { 1240 Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_EXPRESSIONS)); 1241 1242 const lldb::addr_t load_addr = process_address + m_offset; 1243 1244 if (log) { 1245 LLDB_LOGF(log, 1246 "EntityRegister::Dematerialize [address = 0x%" PRIx64 1247 ", m_register_info = %s]", 1248 (uint64_t)load_addr, m_register_info.name); 1249 } 1250 1251 Status extract_error; 1252 1253 DataExtractor register_data; 1254 1255 if (!frame_sp.get()) { 1256 err.SetErrorStringWithFormat( 1257 "couldn't dematerialize register %s without a stack frame", 1258 m_register_info.name); 1259 return; 1260 } 1261 1262 lldb::RegisterContextSP reg_context_sp = frame_sp->GetRegisterContext(); 1263 1264 map.GetMemoryData(register_data, load_addr, m_register_info.byte_size, 1265 extract_error); 1266 1267 if (!extract_error.Success()) { 1268 err.SetErrorStringWithFormat("couldn't get the data for register %s: %s", 1269 m_register_info.name, 1270 extract_error.AsCString()); 1271 return; 1272 } 1273 1274 if (!memcmp(register_data.GetDataStart(), m_register_contents->GetBytes(), 1275 register_data.GetByteSize())) { 1276 // No write required, and in particular we avoid errors if the register 1277 // wasn't writable 1278 1279 m_register_contents.reset(); 1280 return; 1281 } 1282 1283 m_register_contents.reset(); 1284 1285 RegisterValue register_value( 1286 const_cast<uint8_t *>(register_data.GetDataStart()), 1287 register_data.GetByteSize(), register_data.GetByteOrder()); 1288 1289 if (!reg_context_sp->WriteRegister(&m_register_info, register_value)) { 1290 err.SetErrorStringWithFormat("couldn't write the value of register %s", 1291 m_register_info.name); 1292 return; 1293 } 1294 } 1295 1296 void DumpToLog(IRMemoryMap &map, lldb::addr_t process_address, 1297 Log *log) override { 1298 StreamString dump_stream; 1299 1300 Status err; 1301 1302 const lldb::addr_t load_addr = process_address + m_offset; 1303 1304 dump_stream.Printf("0x%" PRIx64 ": EntityRegister (%s)\n", load_addr, 1305 m_register_info.name); 1306 1307 { 1308 dump_stream.Printf("Value:\n"); 1309 1310 DataBufferHeap data(m_size, 0); 1311 1312 map.ReadMemory(data.GetBytes(), load_addr, m_size, err); 1313 1314 if (!err.Success()) { 1315 dump_stream.Printf(" <could not be read>\n"); 1316 } else { 1317 DumpHexBytes(&dump_stream, data.GetBytes(), data.GetByteSize(), 16, 1318 load_addr); 1319 1320 dump_stream.PutChar('\n'); 1321 } 1322 } 1323 1324 log->PutString(dump_stream.GetString()); 1325 } 1326 1327 void Wipe(IRMemoryMap &map, lldb::addr_t process_address) override {} 1328 1329 private: 1330 RegisterInfo m_register_info; 1331 lldb::DataBufferSP m_register_contents; 1332 }; 1333 1334 uint32_t Materializer::AddRegister(const RegisterInfo ®ister_info, 1335 Status &err) { 1336 EntityVector::iterator iter = m_entities.insert(m_entities.end(), EntityUP()); 1337 iter->reset(new EntityRegister(register_info)); 1338 uint32_t ret = AddStructMember(**iter); 1339 (*iter)->SetOffset(ret); 1340 return ret; 1341 } 1342 1343 Materializer::Materializer() 1344 : m_dematerializer_wp(), m_current_offset(0), m_struct_alignment(8) {} 1345 1346 Materializer::~Materializer() { 1347 DematerializerSP dematerializer_sp = m_dematerializer_wp.lock(); 1348 1349 if (dematerializer_sp) 1350 dematerializer_sp->Wipe(); 1351 } 1352 1353 Materializer::DematerializerSP 1354 Materializer::Materialize(lldb::StackFrameSP &frame_sp, IRMemoryMap &map, 1355 lldb::addr_t process_address, Status &error) { 1356 ExecutionContextScope *exe_scope = frame_sp.get(); 1357 1358 if (!exe_scope) 1359 exe_scope = map.GetBestExecutionContextScope(); 1360 1361 DematerializerSP dematerializer_sp = m_dematerializer_wp.lock(); 1362 1363 if (dematerializer_sp) { 1364 error.SetErrorToGenericError(); 1365 error.SetErrorString("Couldn't materialize: already materialized"); 1366 } 1367 1368 DematerializerSP ret( 1369 new Dematerializer(*this, frame_sp, map, process_address)); 1370 1371 if (!exe_scope) { 1372 error.SetErrorToGenericError(); 1373 error.SetErrorString("Couldn't materialize: target doesn't exist"); 1374 } 1375 1376 for (EntityUP &entity_up : m_entities) { 1377 entity_up->Materialize(frame_sp, map, process_address, error); 1378 1379 if (!error.Success()) 1380 return DematerializerSP(); 1381 } 1382 1383 if (Log *log = 1384 lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_EXPRESSIONS)) { 1385 LLDB_LOGF( 1386 log, 1387 "Materializer::Materialize (frame_sp = %p, process_address = 0x%" PRIx64 1388 ") materialized:", 1389 static_cast<void *>(frame_sp.get()), process_address); 1390 for (EntityUP &entity_up : m_entities) 1391 entity_up->DumpToLog(map, process_address, log); 1392 } 1393 1394 m_dematerializer_wp = ret; 1395 1396 return ret; 1397 } 1398 1399 void Materializer::Dematerializer::Dematerialize(Status &error, 1400 lldb::addr_t frame_bottom, 1401 lldb::addr_t frame_top) { 1402 lldb::StackFrameSP frame_sp; 1403 1404 lldb::ThreadSP thread_sp = m_thread_wp.lock(); 1405 if (thread_sp) 1406 frame_sp = thread_sp->GetFrameWithStackID(m_stack_id); 1407 1408 ExecutionContextScope *exe_scope = m_map->GetBestExecutionContextScope(); 1409 1410 if (!IsValid()) { 1411 error.SetErrorToGenericError(); 1412 error.SetErrorString("Couldn't dematerialize: invalid dematerializer"); 1413 } 1414 1415 if (!exe_scope) { 1416 error.SetErrorToGenericError(); 1417 error.SetErrorString("Couldn't dematerialize: target is gone"); 1418 } else { 1419 if (Log *log = 1420 lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_EXPRESSIONS)) { 1421 LLDB_LOGF(log, 1422 "Materializer::Dematerialize (frame_sp = %p, process_address " 1423 "= 0x%" PRIx64 ") about to dematerialize:", 1424 static_cast<void *>(frame_sp.get()), m_process_address); 1425 for (EntityUP &entity_up : m_materializer->m_entities) 1426 entity_up->DumpToLog(*m_map, m_process_address, log); 1427 } 1428 1429 for (EntityUP &entity_up : m_materializer->m_entities) { 1430 entity_up->Dematerialize(frame_sp, *m_map, m_process_address, frame_top, 1431 frame_bottom, error); 1432 1433 if (!error.Success()) 1434 break; 1435 } 1436 } 1437 1438 Wipe(); 1439 } 1440 1441 void Materializer::Dematerializer::Wipe() { 1442 if (!IsValid()) 1443 return; 1444 1445 for (EntityUP &entity_up : m_materializer->m_entities) { 1446 entity_up->Wipe(*m_map, m_process_address); 1447 } 1448 1449 m_materializer = nullptr; 1450 m_map = nullptr; 1451 m_process_address = LLDB_INVALID_ADDRESS; 1452 } 1453 1454 Materializer::PersistentVariableDelegate::~PersistentVariableDelegate() = 1455 default; 1456