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