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