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