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 Error valobj_error = valobj_sp->GetError(); 447 448 if (valobj_error.Fail()) 449 { 450 err.SetErrorStringWithFormat("couldn't get the value of variable %s: %s", m_variable_sp->GetName().AsCString(), valobj_error.AsCString()); 451 return; 452 } 453 454 if (m_is_reference) 455 { 456 DataExtractor valobj_extractor; 457 Error extract_error; 458 valobj_sp->GetData(valobj_extractor, extract_error); 459 460 if (!extract_error.Success()) 461 { 462 err.SetErrorStringWithFormat("couldn't read contents of reference variable %s: %s", m_variable_sp->GetName().AsCString(), extract_error.AsCString()); 463 return; 464 } 465 466 lldb::offset_t offset = 0; 467 lldb::addr_t reference_addr = valobj_extractor.GetAddress(&offset); 468 469 Error write_error; 470 map.WritePointerToMemory(load_addr, reference_addr, write_error); 471 472 if (!write_error.Success()) 473 { 474 err.SetErrorStringWithFormat("couldn't write the contents of reference variable %s to memory: %s", m_variable_sp->GetName().AsCString(), write_error.AsCString()); 475 return; 476 } 477 } 478 else 479 { 480 AddressType address_type = eAddressTypeInvalid; 481 const bool scalar_is_load_address = false; 482 lldb::addr_t addr_of_valobj = valobj_sp->GetAddressOf(scalar_is_load_address, &address_type); 483 if (addr_of_valobj != LLDB_INVALID_ADDRESS) 484 { 485 Error write_error; 486 map.WritePointerToMemory(load_addr, addr_of_valobj, write_error); 487 488 if (!write_error.Success()) 489 { 490 err.SetErrorStringWithFormat("couldn't write the address of variable %s to memory: %s", m_variable_sp->GetName().AsCString(), write_error.AsCString()); 491 return; 492 } 493 } 494 else 495 { 496 DataExtractor data; 497 Error extract_error; 498 valobj_sp->GetData(data, extract_error); 499 if (!extract_error.Success()) 500 { 501 err.SetErrorStringWithFormat("couldn't get the value of %s: %s", m_variable_sp->GetName().AsCString(), extract_error.AsCString()); 502 return; 503 } 504 505 if (m_temporary_allocation != LLDB_INVALID_ADDRESS) 506 { 507 err.SetErrorStringWithFormat("trying to create a temporary region for %s but one exists", m_variable_sp->GetName().AsCString()); 508 return; 509 } 510 511 if (data.GetByteSize() != m_variable_sp->GetType()->GetByteSize()) 512 { 513 if (data.GetByteSize() == 0 && m_variable_sp->LocationExpression().IsValid() == false) 514 { 515 err.SetErrorStringWithFormat("the variable '%s' has no location, it may have been optimized out", m_variable_sp->GetName().AsCString()); 516 } 517 else 518 { 519 err.SetErrorStringWithFormat("size of variable %s (%" PRIu64 ") disagrees with the ValueObject's size (%" PRIu64 ")", 520 m_variable_sp->GetName().AsCString(), 521 m_variable_sp->GetType()->GetByteSize(), 522 data.GetByteSize()); 523 } 524 return; 525 } 526 527 size_t bit_align = m_variable_sp->GetType()->GetClangLayoutType().GetTypeBitAlign(); 528 size_t byte_align = (bit_align + 7) / 8; 529 530 if (!byte_align) 531 byte_align = 1; 532 533 Error alloc_error; 534 535 m_temporary_allocation = map.Malloc(data.GetByteSize(), byte_align, lldb::ePermissionsReadable | lldb::ePermissionsWritable, IRMemoryMap::eAllocationPolicyMirror, alloc_error); 536 m_temporary_allocation_size = data.GetByteSize(); 537 538 m_original_data.reset(new DataBufferHeap(data.GetDataStart(), data.GetByteSize())); 539 540 if (!alloc_error.Success()) 541 { 542 err.SetErrorStringWithFormat("couldn't allocate a temporary region for %s: %s", m_variable_sp->GetName().AsCString(), alloc_error.AsCString()); 543 return; 544 } 545 546 Error write_error; 547 548 map.WriteMemory(m_temporary_allocation, data.GetDataStart(), data.GetByteSize(), write_error); 549 550 if (!write_error.Success()) 551 { 552 err.SetErrorStringWithFormat("couldn't write to the temporary region for %s: %s", m_variable_sp->GetName().AsCString(), write_error.AsCString()); 553 return; 554 } 555 556 Error pointer_write_error; 557 558 map.WritePointerToMemory(load_addr, m_temporary_allocation, pointer_write_error); 559 560 if (!pointer_write_error.Success()) 561 { 562 err.SetErrorStringWithFormat("couldn't write the address of the temporary region for %s: %s", m_variable_sp->GetName().AsCString(), pointer_write_error.AsCString()); 563 } 564 } 565 } 566 } 567 568 void Dematerialize (lldb::StackFrameSP &frame_sp, 569 IRMemoryMap &map, 570 lldb::addr_t process_address, 571 lldb::addr_t frame_top, 572 lldb::addr_t frame_bottom, 573 Error &err) 574 { 575 Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_EXPRESSIONS)); 576 577 const lldb::addr_t load_addr = process_address + m_offset; 578 if (log) 579 { 580 log->Printf("EntityVariable::Dematerialize [address = 0x%" PRIx64 ", m_variable_sp = %s]", 581 (uint64_t)load_addr, 582 m_variable_sp->GetName().AsCString()); 583 } 584 585 if (m_temporary_allocation != LLDB_INVALID_ADDRESS) 586 { 587 ExecutionContextScope *scope = frame_sp.get(); 588 589 if (!scope) 590 scope = map.GetBestExecutionContextScope(); 591 592 lldb::ValueObjectSP valobj_sp = ValueObjectVariable::Create(scope, m_variable_sp); 593 594 if (!valobj_sp) 595 { 596 err.SetErrorStringWithFormat("couldn't get a value object for variable %s", m_variable_sp->GetName().AsCString()); 597 return; 598 } 599 600 lldb_private::DataExtractor data; 601 602 Error extract_error; 603 604 map.GetMemoryData(data, m_temporary_allocation, valobj_sp->GetByteSize(), extract_error); 605 606 if (!extract_error.Success()) 607 { 608 err.SetErrorStringWithFormat("couldn't get the data for variable %s", m_variable_sp->GetName().AsCString()); 609 return; 610 } 611 612 bool actually_write = true; 613 614 if (m_original_data) 615 { 616 if ((data.GetByteSize() == m_original_data->GetByteSize()) && 617 !memcmp(m_original_data->GetBytes(), data.GetDataStart(), data.GetByteSize())) 618 { 619 actually_write = false; 620 } 621 } 622 623 Error set_error; 624 625 if (actually_write) 626 { 627 valobj_sp->SetData(data, set_error); 628 629 if (!set_error.Success()) 630 { 631 err.SetErrorStringWithFormat("couldn't write the new contents of %s back into the variable", m_variable_sp->GetName().AsCString()); 632 return; 633 } 634 } 635 636 Error free_error; 637 638 map.Free(m_temporary_allocation, free_error); 639 640 if (!free_error.Success()) 641 { 642 err.SetErrorStringWithFormat("couldn't free the temporary region for %s: %s", m_variable_sp->GetName().AsCString(), free_error.AsCString()); 643 return; 644 } 645 646 m_original_data.reset(); 647 m_temporary_allocation = LLDB_INVALID_ADDRESS; 648 m_temporary_allocation_size = 0; 649 } 650 } 651 652 void DumpToLog (IRMemoryMap &map, lldb::addr_t process_address, Log *log) 653 { 654 StreamString dump_stream; 655 656 const lldb::addr_t load_addr = process_address + m_offset; 657 dump_stream.Printf("0x%" PRIx64 ": EntityVariable\n", load_addr); 658 659 Error err; 660 661 lldb::addr_t ptr = LLDB_INVALID_ADDRESS; 662 663 { 664 dump_stream.Printf("Pointer:\n"); 665 666 DataBufferHeap data (m_size, 0); 667 668 map.ReadMemory(data.GetBytes(), load_addr, m_size, err); 669 670 if (!err.Success()) 671 { 672 dump_stream.Printf(" <could not be read>\n"); 673 } 674 else 675 { 676 DataExtractor extractor (data.GetBytes(), data.GetByteSize(), map.GetByteOrder(), map.GetAddressByteSize()); 677 678 extractor.DumpHexBytes(&dump_stream, data.GetBytes(), data.GetByteSize(), 16, load_addr); 679 680 lldb::offset_t offset; 681 682 ptr = extractor.GetPointer(&offset); 683 684 dump_stream.PutChar('\n'); 685 } 686 } 687 688 if (m_temporary_allocation == LLDB_INVALID_ADDRESS) 689 { 690 dump_stream.Printf("Points to process memory:\n"); 691 } 692 else 693 { 694 dump_stream.Printf("Temporary allocation:\n"); 695 } 696 697 if (ptr == LLDB_INVALID_ADDRESS) 698 { 699 dump_stream.Printf(" <could not be be found>\n"); 700 } 701 else 702 { 703 DataBufferHeap data (m_temporary_allocation_size, 0); 704 705 map.ReadMemory(data.GetBytes(), m_temporary_allocation, m_temporary_allocation_size, err); 706 707 if (!err.Success()) 708 { 709 dump_stream.Printf(" <could not be read>\n"); 710 } 711 else 712 { 713 DataExtractor extractor (data.GetBytes(), data.GetByteSize(), map.GetByteOrder(), map.GetAddressByteSize()); 714 715 extractor.DumpHexBytes(&dump_stream, data.GetBytes(), data.GetByteSize(), 16, load_addr); 716 717 dump_stream.PutChar('\n'); 718 } 719 } 720 721 log->PutCString(dump_stream.GetData()); 722 } 723 724 void Wipe (IRMemoryMap &map, lldb::addr_t process_address) 725 { 726 if (m_temporary_allocation != LLDB_INVALID_ADDRESS) 727 { 728 Error free_error; 729 730 map.Free(m_temporary_allocation, free_error); 731 732 m_temporary_allocation = LLDB_INVALID_ADDRESS; 733 m_temporary_allocation_size = 0; 734 } 735 736 } 737 private: 738 lldb::VariableSP m_variable_sp; 739 bool m_is_reference; 740 lldb::addr_t m_temporary_allocation; 741 size_t m_temporary_allocation_size; 742 lldb::DataBufferSP m_original_data; 743 }; 744 745 uint32_t 746 Materializer::AddVariable (lldb::VariableSP &variable_sp, Error &err) 747 { 748 EntityVector::iterator iter = m_entities.insert(m_entities.end(), EntityUP()); 749 iter->reset (new EntityVariable (variable_sp)); 750 uint32_t ret = AddStructMember(**iter); 751 (*iter)->SetOffset(ret); 752 return ret; 753 } 754 755 class EntityResultVariable : public Materializer::Entity 756 { 757 public: 758 EntityResultVariable (const TypeFromUser &type, bool is_program_reference, bool keep_in_memory) : 759 Entity(), 760 m_type(type), 761 m_is_program_reference(is_program_reference), 762 m_keep_in_memory(keep_in_memory), 763 m_temporary_allocation(LLDB_INVALID_ADDRESS), 764 m_temporary_allocation_size(0) 765 { 766 // Hard-coding to maximum size of a pointer since all results are materialized by reference 767 m_size = 8; 768 m_alignment = 8; 769 } 770 771 void Materialize (lldb::StackFrameSP &frame_sp, IRMemoryMap &map, lldb::addr_t process_address, Error &err) 772 { 773 if (!m_is_program_reference) 774 { 775 if (m_temporary_allocation != LLDB_INVALID_ADDRESS) 776 { 777 err.SetErrorString("Trying to create a temporary region for the result but one exists"); 778 return; 779 } 780 781 const lldb::addr_t load_addr = process_address + m_offset; 782 783 size_t byte_size = m_type.GetByteSize(); 784 size_t bit_align = m_type.GetTypeBitAlign(); 785 size_t byte_align = (bit_align + 7) / 8; 786 787 if (!byte_align) 788 byte_align = 1; 789 790 Error alloc_error; 791 792 m_temporary_allocation = map.Malloc(byte_size, byte_align, lldb::ePermissionsReadable | lldb::ePermissionsWritable, IRMemoryMap::eAllocationPolicyMirror, alloc_error); 793 m_temporary_allocation_size = byte_size; 794 795 if (!alloc_error.Success()) 796 { 797 err.SetErrorStringWithFormat("couldn't allocate a temporary region for the result: %s", alloc_error.AsCString()); 798 return; 799 } 800 801 Error pointer_write_error; 802 803 map.WritePointerToMemory(load_addr, m_temporary_allocation, pointer_write_error); 804 805 if (!pointer_write_error.Success()) 806 { 807 err.SetErrorStringWithFormat("couldn't write the address of the temporary region for the result: %s", pointer_write_error.AsCString()); 808 } 809 } 810 } 811 812 void Dematerialize (lldb::StackFrameSP &frame_sp, 813 IRMemoryMap &map, 814 lldb::addr_t process_address, 815 lldb::addr_t frame_top, 816 lldb::addr_t frame_bottom, 817 Error &err) 818 { 819 err.SetErrorString("Tried to detmaterialize a result variable with the normal Dematerialize method"); 820 } 821 822 void Dematerialize (lldb::ClangExpressionVariableSP &result_variable_sp, 823 lldb::StackFrameSP &frame_sp, 824 IRMemoryMap &map, 825 lldb::addr_t process_address, 826 lldb::addr_t frame_top, 827 lldb::addr_t frame_bottom, 828 Error &err) 829 { 830 err.Clear(); 831 832 ExecutionContextScope *exe_scope = map.GetBestExecutionContextScope(); 833 834 if (!exe_scope) 835 { 836 err.SetErrorString("Couldn't dematerialize a result variable: invalid execution context scope"); 837 return; 838 } 839 840 lldb::addr_t address; 841 Error read_error; 842 const lldb::addr_t load_addr = process_address + m_offset; 843 844 map.ReadPointerFromMemory (&address, load_addr, read_error); 845 846 if (!read_error.Success()) 847 { 848 err.SetErrorString("Couldn't dematerialize a result variable: couldn't read its address"); 849 return; 850 } 851 852 lldb::TargetSP target_sp = exe_scope->CalculateTarget(); 853 854 if (!target_sp) 855 { 856 err.SetErrorString("Couldn't dematerialize a result variable: no target"); 857 return; 858 } 859 860 ConstString name = target_sp->GetPersistentVariables().GetNextPersistentVariableName(); 861 862 lldb::ClangExpressionVariableSP ret; 863 864 ret = target_sp->GetPersistentVariables().CreateVariable(exe_scope, 865 name, 866 m_type, 867 map.GetByteOrder(), 868 map.GetAddressByteSize()); 869 870 if (!ret) 871 { 872 err.SetErrorStringWithFormat("couldn't dematerialize a result variable: failed to make persistent variable %s", name.AsCString()); 873 return; 874 } 875 876 lldb::ProcessSP process_sp = map.GetBestExecutionContextScope()->CalculateProcess(); 877 878 bool can_persist = (m_is_program_reference && process_sp && process_sp->CanJIT() && !(address >= frame_bottom && address < frame_top)); 879 880 if (can_persist && m_keep_in_memory) 881 { 882 ret->m_live_sp = ValueObjectConstResult::Create(exe_scope, 883 m_type, 884 name, 885 address, 886 eAddressTypeLoad, 887 map.GetAddressByteSize()); 888 } 889 890 ret->ValueUpdated(); 891 892 const size_t pvar_byte_size = ret->GetByteSize(); 893 uint8_t *pvar_data = ret->GetValueBytes(); 894 895 map.ReadMemory(pvar_data, address, pvar_byte_size, read_error); 896 897 if (!read_error.Success()) 898 { 899 err.SetErrorString("Couldn't dematerialize a result variable: couldn't read its memory"); 900 return; 901 } 902 903 result_variable_sp = ret; 904 905 if (!can_persist || !m_keep_in_memory) 906 { 907 ret->m_flags |= ClangExpressionVariable::EVNeedsAllocation; 908 909 if (m_temporary_allocation != LLDB_INVALID_ADDRESS) 910 { 911 Error free_error; 912 map.Free(m_temporary_allocation, free_error); 913 } 914 } 915 else 916 { 917 ret->m_flags |= ClangExpressionVariable::EVIsLLDBAllocated; 918 } 919 920 m_temporary_allocation = LLDB_INVALID_ADDRESS; 921 m_temporary_allocation_size = 0; 922 } 923 924 void DumpToLog (IRMemoryMap &map, lldb::addr_t process_address, Log *log) 925 { 926 StreamString dump_stream; 927 928 const lldb::addr_t load_addr = process_address + m_offset; 929 930 dump_stream.Printf("0x%" PRIx64 ": EntityResultVariable\n", load_addr); 931 932 Error err; 933 934 lldb::addr_t ptr = LLDB_INVALID_ADDRESS; 935 936 { 937 dump_stream.Printf("Pointer:\n"); 938 939 DataBufferHeap data (m_size, 0); 940 941 map.ReadMemory(data.GetBytes(), load_addr, m_size, err); 942 943 if (!err.Success()) 944 { 945 dump_stream.Printf(" <could not be read>\n"); 946 } 947 else 948 { 949 DataExtractor extractor (data.GetBytes(), data.GetByteSize(), map.GetByteOrder(), map.GetAddressByteSize()); 950 951 extractor.DumpHexBytes(&dump_stream, data.GetBytes(), data.GetByteSize(), 16, load_addr); 952 953 lldb::offset_t offset; 954 955 ptr = extractor.GetPointer(&offset); 956 957 dump_stream.PutChar('\n'); 958 } 959 } 960 961 if (m_temporary_allocation == LLDB_INVALID_ADDRESS) 962 { 963 dump_stream.Printf("Points to process memory:\n"); 964 } 965 else 966 { 967 dump_stream.Printf("Temporary allocation:\n"); 968 } 969 970 if (ptr == LLDB_INVALID_ADDRESS) 971 { 972 dump_stream.Printf(" <could not be be found>\n"); 973 } 974 else 975 { 976 DataBufferHeap data (m_temporary_allocation_size, 0); 977 978 map.ReadMemory(data.GetBytes(), m_temporary_allocation, m_temporary_allocation_size, err); 979 980 if (!err.Success()) 981 { 982 dump_stream.Printf(" <could not be read>\n"); 983 } 984 else 985 { 986 DataExtractor extractor (data.GetBytes(), data.GetByteSize(), map.GetByteOrder(), map.GetAddressByteSize()); 987 988 extractor.DumpHexBytes(&dump_stream, data.GetBytes(), data.GetByteSize(), 16, load_addr); 989 990 dump_stream.PutChar('\n'); 991 } 992 } 993 994 log->PutCString(dump_stream.GetData()); 995 } 996 997 void Wipe (IRMemoryMap &map, lldb::addr_t process_address) 998 { 999 if (!m_keep_in_memory && m_temporary_allocation != LLDB_INVALID_ADDRESS) 1000 { 1001 Error free_error; 1002 1003 map.Free(m_temporary_allocation, free_error); 1004 } 1005 1006 m_temporary_allocation = LLDB_INVALID_ADDRESS; 1007 m_temporary_allocation_size = 0; 1008 } 1009 private: 1010 TypeFromUser m_type; 1011 bool m_is_program_reference; 1012 bool m_keep_in_memory; 1013 1014 lldb::addr_t m_temporary_allocation; 1015 size_t m_temporary_allocation_size; 1016 }; 1017 1018 uint32_t 1019 Materializer::AddResultVariable (const TypeFromUser &type, bool is_program_reference, bool keep_in_memory, Error &err) 1020 { 1021 EntityVector::iterator iter = m_entities.insert(m_entities.end(), EntityUP()); 1022 iter->reset (new EntityResultVariable (type, is_program_reference, keep_in_memory)); 1023 uint32_t ret = AddStructMember(**iter); 1024 (*iter)->SetOffset(ret); 1025 m_result_entity = iter->get(); 1026 return ret; 1027 } 1028 1029 class EntitySymbol : public Materializer::Entity 1030 { 1031 public: 1032 EntitySymbol (const Symbol &symbol) : 1033 Entity(), 1034 m_symbol(symbol) 1035 { 1036 // Hard-coding to maximum size of a symbol 1037 m_size = 8; 1038 m_alignment = 8; 1039 } 1040 1041 void Materialize (lldb::StackFrameSP &frame_sp, IRMemoryMap &map, lldb::addr_t process_address, Error &err) 1042 { 1043 Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_EXPRESSIONS)); 1044 1045 const lldb::addr_t load_addr = process_address + m_offset; 1046 1047 if (log) 1048 { 1049 log->Printf("EntitySymbol::Materialize [address = 0x%" PRIx64 ", m_symbol = %s]", 1050 (uint64_t)load_addr, 1051 m_symbol.GetName().AsCString()); 1052 } 1053 1054 Address &sym_address = m_symbol.GetAddress(); 1055 1056 ExecutionContextScope *exe_scope = map.GetBestExecutionContextScope(); 1057 1058 lldb::TargetSP target_sp; 1059 1060 if (exe_scope) 1061 target_sp = map.GetBestExecutionContextScope()->CalculateTarget(); 1062 1063 if (!target_sp) 1064 { 1065 err.SetErrorStringWithFormat("couldn't resolve symbol %s because there is no target", m_symbol.GetName().AsCString()); 1066 return; 1067 } 1068 1069 lldb::addr_t resolved_address = sym_address.GetLoadAddress(target_sp.get()); 1070 1071 if (resolved_address == LLDB_INVALID_ADDRESS) 1072 resolved_address = sym_address.GetFileAddress(); 1073 1074 Error pointer_write_error; 1075 1076 map.WritePointerToMemory(load_addr, resolved_address, pointer_write_error); 1077 1078 if (!pointer_write_error.Success()) 1079 { 1080 err.SetErrorStringWithFormat("couldn't write the address of symbol %s: %s", m_symbol.GetName().AsCString(), pointer_write_error.AsCString()); 1081 return; 1082 } 1083 } 1084 1085 void Dematerialize (lldb::StackFrameSP &frame_sp, 1086 IRMemoryMap &map, 1087 lldb::addr_t process_address, 1088 lldb::addr_t frame_top, 1089 lldb::addr_t frame_bottom, 1090 Error &err) 1091 { 1092 Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_EXPRESSIONS)); 1093 1094 const lldb::addr_t load_addr = process_address + m_offset; 1095 1096 if (log) 1097 { 1098 log->Printf("EntitySymbol::Dematerialize [address = 0x%" PRIx64 ", m_symbol = %s]", 1099 (uint64_t)load_addr, 1100 m_symbol.GetName().AsCString()); 1101 } 1102 1103 // no work needs to be done 1104 } 1105 1106 void DumpToLog (IRMemoryMap &map, lldb::addr_t process_address, Log *log) 1107 { 1108 StreamString dump_stream; 1109 1110 Error err; 1111 1112 const lldb::addr_t load_addr = process_address + m_offset; 1113 1114 dump_stream.Printf("0x%" PRIx64 ": EntitySymbol (%s)\n", load_addr, m_symbol.GetName().AsCString()); 1115 1116 { 1117 dump_stream.Printf("Pointer:\n"); 1118 1119 DataBufferHeap data (m_size, 0); 1120 1121 map.ReadMemory(data.GetBytes(), load_addr, m_size, err); 1122 1123 if (!err.Success()) 1124 { 1125 dump_stream.Printf(" <could not be read>\n"); 1126 } 1127 else 1128 { 1129 DataExtractor extractor (data.GetBytes(), data.GetByteSize(), map.GetByteOrder(), map.GetAddressByteSize()); 1130 1131 extractor.DumpHexBytes(&dump_stream, data.GetBytes(), data.GetByteSize(), 16, load_addr); 1132 1133 dump_stream.PutChar('\n'); 1134 } 1135 } 1136 1137 log->PutCString(dump_stream.GetData()); 1138 } 1139 1140 void Wipe (IRMemoryMap &map, lldb::addr_t process_address) 1141 { 1142 } 1143 private: 1144 Symbol m_symbol; 1145 }; 1146 1147 uint32_t 1148 Materializer::AddSymbol (const Symbol &symbol_sp, Error &err) 1149 { 1150 EntityVector::iterator iter = m_entities.insert(m_entities.end(), EntityUP()); 1151 iter->reset (new 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 { 1159 public: 1160 EntityRegister (const RegisterInfo ®ister_info) : 1161 Entity(), 1162 m_register_info(register_info) 1163 { 1164 // Hard-coding alignment conservatively 1165 m_size = m_register_info.byte_size; 1166 m_alignment = m_register_info.byte_size; 1167 } 1168 1169 void Materialize (lldb::StackFrameSP &frame_sp, IRMemoryMap &map, lldb::addr_t process_address, Error &err) 1170 { 1171 Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_EXPRESSIONS)); 1172 1173 const lldb::addr_t load_addr = process_address + m_offset; 1174 1175 if (log) 1176 { 1177 log->Printf("EntityRegister::Materialize [address = 0x%" PRIx64 ", m_register_info = %s]", 1178 (uint64_t)load_addr, 1179 m_register_info.name); 1180 } 1181 1182 RegisterValue reg_value; 1183 1184 if (!frame_sp.get()) 1185 { 1186 err.SetErrorStringWithFormat("couldn't materialize register %s without a stack frame", m_register_info.name); 1187 return; 1188 } 1189 1190 lldb::RegisterContextSP reg_context_sp = frame_sp->GetRegisterContext(); 1191 1192 if (!reg_context_sp->ReadRegister(&m_register_info, reg_value)) 1193 { 1194 err.SetErrorStringWithFormat("couldn't read the value of register %s", m_register_info.name); 1195 return; 1196 } 1197 1198 DataExtractor register_data; 1199 1200 if (!reg_value.GetData(register_data)) 1201 { 1202 err.SetErrorStringWithFormat("couldn't get the data for register %s", m_register_info.name); 1203 return; 1204 } 1205 1206 if (register_data.GetByteSize() != m_register_info.byte_size) 1207 { 1208 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); 1209 return; 1210 } 1211 1212 m_register_contents.reset(new DataBufferHeap(register_data.GetDataStart(), register_data.GetByteSize())); 1213 1214 Error write_error; 1215 1216 map.WriteMemory(load_addr, register_data.GetDataStart(), register_data.GetByteSize(), write_error); 1217 1218 if (!write_error.Success()) 1219 { 1220 err.SetErrorStringWithFormat("couldn't write the contents of register %s: %s", m_register_info.name, write_error.AsCString()); 1221 return; 1222 } 1223 } 1224 1225 void Dematerialize (lldb::StackFrameSP &frame_sp, 1226 IRMemoryMap &map, 1227 lldb::addr_t process_address, 1228 lldb::addr_t frame_top, 1229 lldb::addr_t frame_bottom, 1230 Error &err) 1231 { 1232 Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_EXPRESSIONS)); 1233 1234 const lldb::addr_t load_addr = process_address + m_offset; 1235 1236 if (log) 1237 { 1238 log->Printf("EntityRegister::Dematerialize [address = 0x%" PRIx64 ", m_register_info = %s]", 1239 (uint64_t)load_addr, 1240 m_register_info.name); 1241 } 1242 1243 Error extract_error; 1244 1245 DataExtractor register_data; 1246 1247 if (!frame_sp.get()) 1248 { 1249 err.SetErrorStringWithFormat("couldn't dematerialize register %s without a stack frame", 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, extract_error); 1256 1257 if (!extract_error.Success()) 1258 { 1259 err.SetErrorStringWithFormat("couldn't get the data for register %s: %s", m_register_info.name, extract_error.AsCString()); 1260 return; 1261 } 1262 1263 if (!memcmp(register_data.GetDataStart(), m_register_contents->GetBytes(), register_data.GetByteSize())) 1264 { 1265 // No write required, and in particular we avoid errors if the register wasn't writable 1266 1267 m_register_contents.reset(); 1268 return; 1269 } 1270 1271 m_register_contents.reset(); 1272 1273 RegisterValue register_value (const_cast<uint8_t*>(register_data.GetDataStart()), register_data.GetByteSize(), register_data.GetByteOrder()); 1274 1275 if (!reg_context_sp->WriteRegister(&m_register_info, register_value)) 1276 { 1277 err.SetErrorStringWithFormat("couldn't write the value of register %s", m_register_info.name); 1278 return; 1279 } 1280 } 1281 1282 void DumpToLog (IRMemoryMap &map, lldb::addr_t process_address, Log *log) 1283 { 1284 StreamString dump_stream; 1285 1286 Error err; 1287 1288 const lldb::addr_t load_addr = process_address + m_offset; 1289 1290 1291 dump_stream.Printf("0x%" PRIx64 ": EntityRegister (%s)\n", load_addr, m_register_info.name); 1292 1293 { 1294 dump_stream.Printf("Value:\n"); 1295 1296 DataBufferHeap data (m_size, 0); 1297 1298 map.ReadMemory(data.GetBytes(), load_addr, m_size, err); 1299 1300 if (!err.Success()) 1301 { 1302 dump_stream.Printf(" <could not be read>\n"); 1303 } 1304 else 1305 { 1306 DataExtractor extractor (data.GetBytes(), data.GetByteSize(), map.GetByteOrder(), map.GetAddressByteSize()); 1307 1308 extractor.DumpHexBytes(&dump_stream, data.GetBytes(), data.GetByteSize(), 16, load_addr); 1309 1310 dump_stream.PutChar('\n'); 1311 } 1312 } 1313 1314 log->PutCString(dump_stream.GetData()); 1315 } 1316 1317 void Wipe (IRMemoryMap &map, lldb::addr_t process_address) 1318 { 1319 } 1320 private: 1321 RegisterInfo m_register_info; 1322 lldb::DataBufferSP m_register_contents; 1323 }; 1324 1325 uint32_t 1326 Materializer::AddRegister (const RegisterInfo ®ister_info, Error &err) 1327 { 1328 EntityVector::iterator iter = m_entities.insert(m_entities.end(), EntityUP()); 1329 iter->reset (new EntityRegister (register_info)); 1330 uint32_t ret = AddStructMember(**iter); 1331 (*iter)->SetOffset(ret); 1332 return ret; 1333 } 1334 1335 Materializer::Materializer () : 1336 m_dematerializer_wp(), 1337 m_result_entity(NULL), 1338 m_current_offset(0), 1339 m_struct_alignment(8) 1340 { 1341 } 1342 1343 Materializer::~Materializer () 1344 { 1345 DematerializerSP dematerializer_sp = m_dematerializer_wp.lock(); 1346 1347 if (dematerializer_sp) 1348 dematerializer_sp->Wipe(); 1349 } 1350 1351 Materializer::DematerializerSP 1352 Materializer::Materialize (lldb::StackFrameSP &frame_sp, IRMemoryMap &map, lldb::addr_t process_address, Error &error) 1353 { 1354 ExecutionContextScope *exe_scope = frame_sp.get(); 1355 1356 if (!exe_scope) 1357 exe_scope = map.GetBestExecutionContextScope(); 1358 1359 DematerializerSP dematerializer_sp = m_dematerializer_wp.lock(); 1360 1361 if (dematerializer_sp) 1362 { 1363 error.SetErrorToGenericError(); 1364 error.SetErrorString("Couldn't materialize: already materialized"); 1365 } 1366 1367 DematerializerSP ret(new Dematerializer(*this, frame_sp, map, process_address)); 1368 1369 if (!exe_scope) 1370 { 1371 error.SetErrorToGenericError(); 1372 error.SetErrorString("Couldn't materialize: target doesn't exist"); 1373 } 1374 1375 for (EntityUP &entity_up : m_entities) 1376 { 1377 entity_up->Materialize(frame_sp, map, process_address, error); 1378 1379 if (!error.Success()) 1380 return DematerializerSP(); 1381 } 1382 1383 if (Log *log = lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_EXPRESSIONS)) 1384 { 1385 log->Printf("Materializer::Materialize (frame_sp = %p, process_address = 0x%" PRIx64 ") materialized:", 1386 static_cast<void*>(frame_sp.get()), process_address); 1387 for (EntityUP &entity_up : m_entities) 1388 entity_up->DumpToLog(map, process_address, log); 1389 } 1390 1391 m_dematerializer_wp = ret; 1392 1393 return ret; 1394 } 1395 1396 void 1397 Materializer::Dematerializer::Dematerialize (Error &error, lldb::ClangExpressionVariableSP &result_sp, lldb::addr_t frame_bottom, lldb::addr_t frame_top) 1398 { 1399 lldb::StackFrameSP frame_sp; 1400 1401 lldb::ThreadSP thread_sp = m_thread_wp.lock(); 1402 if (thread_sp) 1403 frame_sp = thread_sp->GetFrameWithStackID(m_stack_id); 1404 1405 ExecutionContextScope *exe_scope = m_map->GetBestExecutionContextScope(); 1406 1407 if (!IsValid()) 1408 { 1409 error.SetErrorToGenericError(); 1410 error.SetErrorString("Couldn't dematerialize: invalid dematerializer"); 1411 } 1412 1413 if (!exe_scope) 1414 { 1415 error.SetErrorToGenericError(); 1416 error.SetErrorString("Couldn't dematerialize: target is gone"); 1417 } 1418 else 1419 { 1420 if (Log *log =lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_EXPRESSIONS)) 1421 { 1422 log->Printf("Materializer::Dematerialize (frame_sp = %p, process_address = 0x%" PRIx64 ") about to dematerialize:", 1423 static_cast<void*>(frame_sp.get()), m_process_address); 1424 for (EntityUP &entity_up : m_materializer->m_entities) 1425 entity_up->DumpToLog(*m_map, m_process_address, log); 1426 } 1427 1428 for (EntityUP &entity_up : m_materializer->m_entities) 1429 { 1430 if (entity_up.get() == m_materializer->m_result_entity) 1431 { 1432 static_cast<EntityResultVariable*>(m_materializer->m_result_entity)->Dematerialize (result_sp, frame_sp, *m_map, m_process_address, frame_top, frame_bottom, error); 1433 } 1434 else 1435 { 1436 entity_up->Dematerialize (frame_sp, *m_map, m_process_address, frame_top, frame_bottom, error); 1437 } 1438 1439 if (!error.Success()) 1440 break; 1441 } 1442 } 1443 1444 Wipe(); 1445 } 1446 1447 void 1448 Materializer::Dematerializer::Wipe () 1449 { 1450 if (!IsValid()) 1451 return; 1452 1453 for (EntityUP &entity_up : m_materializer->m_entities) 1454 { 1455 entity_up->Wipe (*m_map, m_process_address); 1456 } 1457 1458 m_materializer = NULL; 1459 m_map = NULL; 1460 m_process_address = LLDB_INVALID_ADDRESS; 1461 } 1462