1 //===-- Address.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/Address.h" 11 #include "lldb/Core/DumpDataExtractor.h" 12 #include "lldb/Core/Module.h" 13 #include "lldb/Core/ModuleList.h" // for ModuleList 14 #include "lldb/Core/Section.h" 15 #include "lldb/Symbol/Block.h" 16 #include "lldb/Symbol/Declaration.h" // for Declaration 17 #include "lldb/Symbol/LineEntry.h" // for LineEntry 18 #include "lldb/Symbol/ObjectFile.h" 19 #include "lldb/Symbol/Symbol.h" // for Symbol 20 #include "lldb/Symbol/SymbolContext.h" // for SymbolContext 21 #include "lldb/Symbol/SymbolVendor.h" 22 #include "lldb/Symbol/Symtab.h" // for Symtab 23 #include "lldb/Symbol/Type.h" // for Type 24 #include "lldb/Symbol/Variable.h" 25 #include "lldb/Symbol/VariableList.h" 26 #include "lldb/Target/ExecutionContext.h" 27 #include "lldb/Target/ExecutionContextScope.h" // for ExecutionContextScope 28 #include "lldb/Target/Process.h" 29 #include "lldb/Target/SectionLoadList.h" 30 #include "lldb/Target/Target.h" 31 #include "lldb/Utility/ConstString.h" // for ConstString 32 #include "lldb/Utility/DataExtractor.h" // for DataExtractor 33 #include "lldb/Utility/Endian.h" // for InlHostByteOrder 34 #include "lldb/Utility/FileSpec.h" // for FileSpec 35 #include "lldb/Utility/Status.h" // for Status 36 #include "lldb/Utility/Stream.h" // for Stream 37 #include "lldb/Utility/StreamString.h" // for StreamString 38 39 #include "llvm/ADT/StringRef.h" // for StringRef 40 #include "llvm/ADT/Triple.h" 41 #include "llvm/Support/Compiler.h" // for LLVM_FALLTHROUGH 42 43 #include <cstdint> // for uint8_t, uint32_t 44 #include <memory> // for shared_ptr, operator!= 45 #include <vector> // for vector 46 47 #include <assert.h> // for assert 48 #include <inttypes.h> // for PRIu64, PRIx64 49 #include <string.h> // for size_t, strlen 50 51 namespace lldb_private { 52 class CompileUnit; 53 } 54 namespace lldb_private { 55 class Function; 56 } 57 58 using namespace lldb; 59 using namespace lldb_private; 60 61 static size_t ReadBytes(ExecutionContextScope *exe_scope, 62 const Address &address, void *dst, size_t dst_len) { 63 if (exe_scope == nullptr) 64 return 0; 65 66 TargetSP target_sp(exe_scope->CalculateTarget()); 67 if (target_sp) { 68 Status error; 69 bool prefer_file_cache = false; 70 return target_sp->ReadMemory(address, prefer_file_cache, dst, dst_len, 71 error); 72 } 73 return 0; 74 } 75 76 static bool GetByteOrderAndAddressSize(ExecutionContextScope *exe_scope, 77 const Address &address, 78 ByteOrder &byte_order, 79 uint32_t &addr_size) { 80 byte_order = eByteOrderInvalid; 81 addr_size = 0; 82 if (exe_scope == nullptr) 83 return false; 84 85 TargetSP target_sp(exe_scope->CalculateTarget()); 86 if (target_sp) { 87 byte_order = target_sp->GetArchitecture().GetByteOrder(); 88 addr_size = target_sp->GetArchitecture().GetAddressByteSize(); 89 } 90 91 if (byte_order == eByteOrderInvalid || addr_size == 0) { 92 ModuleSP module_sp(address.GetModule()); 93 if (module_sp) { 94 byte_order = module_sp->GetArchitecture().GetByteOrder(); 95 addr_size = module_sp->GetArchitecture().GetAddressByteSize(); 96 } 97 } 98 return byte_order != eByteOrderInvalid && addr_size != 0; 99 } 100 101 static uint64_t ReadUIntMax64(ExecutionContextScope *exe_scope, 102 const Address &address, uint32_t byte_size, 103 bool &success) { 104 uint64_t uval64 = 0; 105 if (exe_scope == nullptr || byte_size > sizeof(uint64_t)) { 106 success = false; 107 return 0; 108 } 109 uint64_t buf = 0; 110 111 success = ReadBytes(exe_scope, address, &buf, byte_size) == byte_size; 112 if (success) { 113 ByteOrder byte_order = eByteOrderInvalid; 114 uint32_t addr_size = 0; 115 if (GetByteOrderAndAddressSize(exe_scope, address, byte_order, addr_size)) { 116 DataExtractor data(&buf, sizeof(buf), byte_order, addr_size); 117 lldb::offset_t offset = 0; 118 uval64 = data.GetU64(&offset); 119 } else 120 success = false; 121 } 122 return uval64; 123 } 124 125 static bool ReadAddress(ExecutionContextScope *exe_scope, 126 const Address &address, uint32_t pointer_size, 127 Address &deref_so_addr) { 128 if (exe_scope == nullptr) 129 return false; 130 131 bool success = false; 132 addr_t deref_addr = ReadUIntMax64(exe_scope, address, pointer_size, success); 133 if (success) { 134 ExecutionContext exe_ctx; 135 exe_scope->CalculateExecutionContext(exe_ctx); 136 // If we have any sections that are loaded, try and resolve using the 137 // section load list 138 Target *target = exe_ctx.GetTargetPtr(); 139 if (target && !target->GetSectionLoadList().IsEmpty()) { 140 if (target->GetSectionLoadList().ResolveLoadAddress(deref_addr, 141 deref_so_addr)) 142 return true; 143 } else { 144 // If we were not running, yet able to read an integer, we must have a 145 // module 146 ModuleSP module_sp(address.GetModule()); 147 148 assert(module_sp); 149 if (module_sp->ResolveFileAddress(deref_addr, deref_so_addr)) 150 return true; 151 } 152 153 // We couldn't make "deref_addr" into a section offset value, but we were 154 // able to read the address, so we return a section offset address with no 155 // section and "deref_addr" as the offset (address). 156 deref_so_addr.SetRawAddress(deref_addr); 157 return true; 158 } 159 return false; 160 } 161 162 static bool DumpUInt(ExecutionContextScope *exe_scope, const Address &address, 163 uint32_t byte_size, Stream *strm) { 164 if (exe_scope == nullptr || byte_size == 0) 165 return 0; 166 std::vector<uint8_t> buf(byte_size, 0); 167 168 if (ReadBytes(exe_scope, address, &buf[0], buf.size()) == buf.size()) { 169 ByteOrder byte_order = eByteOrderInvalid; 170 uint32_t addr_size = 0; 171 if (GetByteOrderAndAddressSize(exe_scope, address, byte_order, addr_size)) { 172 DataExtractor data(&buf.front(), buf.size(), byte_order, addr_size); 173 174 DumpDataExtractor(data, strm, 175 0, // Start offset in "data" 176 eFormatHex, // Print as characters 177 buf.size(), // Size of item 178 1, // Items count 179 UINT32_MAX, // num per line 180 LLDB_INVALID_ADDRESS, // base address 181 0, // bitfield bit size 182 0); // bitfield bit offset 183 184 return true; 185 } 186 } 187 return false; 188 } 189 190 static size_t ReadCStringFromMemory(ExecutionContextScope *exe_scope, 191 const Address &address, Stream *strm) { 192 if (exe_scope == nullptr) 193 return 0; 194 const size_t k_buf_len = 256; 195 char buf[k_buf_len + 1]; 196 buf[k_buf_len] = '\0'; // NULL terminate 197 198 // Byte order and address size don't matter for C string dumping.. 199 DataExtractor data(buf, sizeof(buf), endian::InlHostByteOrder(), 4); 200 size_t total_len = 0; 201 size_t bytes_read; 202 Address curr_address(address); 203 strm->PutChar('"'); 204 while ((bytes_read = ReadBytes(exe_scope, curr_address, buf, k_buf_len)) > 205 0) { 206 size_t len = strlen(buf); 207 if (len == 0) 208 break; 209 if (len > bytes_read) 210 len = bytes_read; 211 212 DumpDataExtractor(data, strm, 213 0, // Start offset in "data" 214 eFormatChar, // Print as characters 215 1, // Size of item (1 byte for a char!) 216 len, // How many bytes to print? 217 UINT32_MAX, // num per line 218 LLDB_INVALID_ADDRESS, // base address 219 0, // bitfield bit size 220 221 0); // bitfield bit offset 222 223 total_len += bytes_read; 224 225 if (len < k_buf_len) 226 break; 227 curr_address.SetOffset(curr_address.GetOffset() + bytes_read); 228 } 229 strm->PutChar('"'); 230 return total_len; 231 } 232 233 Address::Address(lldb::addr_t abs_addr) : m_section_wp(), m_offset(abs_addr) {} 234 235 Address::Address(addr_t address, const SectionList *section_list) 236 : m_section_wp(), m_offset(LLDB_INVALID_ADDRESS) { 237 ResolveAddressUsingFileSections(address, section_list); 238 } 239 240 const Address &Address::operator=(const Address &rhs) { 241 if (this != &rhs) { 242 m_section_wp = rhs.m_section_wp; 243 m_offset = rhs.m_offset; 244 } 245 return *this; 246 } 247 248 bool Address::ResolveAddressUsingFileSections(addr_t file_addr, 249 const SectionList *section_list) { 250 if (section_list) { 251 SectionSP section_sp( 252 section_list->FindSectionContainingFileAddress(file_addr)); 253 m_section_wp = section_sp; 254 if (section_sp) { 255 assert(section_sp->ContainsFileAddress(file_addr)); 256 m_offset = file_addr - section_sp->GetFileAddress(); 257 return true; // Successfully transformed addr into a section offset 258 // address 259 } 260 } 261 m_offset = file_addr; 262 return false; // Failed to resolve this address to a section offset value 263 } 264 265 ModuleSP Address::GetModule() const { 266 lldb::ModuleSP module_sp; 267 SectionSP section_sp(GetSection()); 268 if (section_sp) 269 module_sp = section_sp->GetModule(); 270 return module_sp; 271 } 272 273 addr_t Address::GetFileAddress() const { 274 SectionSP section_sp(GetSection()); 275 if (section_sp) { 276 addr_t sect_file_addr = section_sp->GetFileAddress(); 277 if (sect_file_addr == LLDB_INVALID_ADDRESS) { 278 // Section isn't resolved, we can't return a valid file address 279 return LLDB_INVALID_ADDRESS; 280 } 281 // We have a valid file range, so we can return the file based address by 282 // adding the file base address to our offset 283 return sect_file_addr + m_offset; 284 } else if (SectionWasDeletedPrivate()) { 285 // Used to have a valid section but it got deleted so the offset doesn't 286 // mean anything without the section 287 return LLDB_INVALID_ADDRESS; 288 } 289 // No section, we just return the offset since it is the value in this case 290 return m_offset; 291 } 292 293 addr_t Address::GetLoadAddress(Target *target) const { 294 SectionSP section_sp(GetSection()); 295 if (section_sp) { 296 if (target) { 297 addr_t sect_load_addr = section_sp->GetLoadBaseAddress(target); 298 299 if (sect_load_addr != LLDB_INVALID_ADDRESS) { 300 // We have a valid file range, so we can return the file based address 301 // by adding the file base address to our offset 302 return sect_load_addr + m_offset; 303 } 304 } 305 } else if (SectionWasDeletedPrivate()) { 306 // Used to have a valid section but it got deleted so the offset doesn't 307 // mean anything without the section 308 return LLDB_INVALID_ADDRESS; 309 } else { 310 // We don't have a section so the offset is the load address 311 return m_offset; 312 } 313 // The section isn't resolved or an invalid target was passed in so we can't 314 // return a valid load address. 315 return LLDB_INVALID_ADDRESS; 316 } 317 318 addr_t Address::GetCallableLoadAddress(Target *target, bool is_indirect) const { 319 addr_t code_addr = LLDB_INVALID_ADDRESS; 320 321 if (is_indirect && target) { 322 ProcessSP processSP = target->GetProcessSP(); 323 Status error; 324 if (processSP) { 325 code_addr = processSP->ResolveIndirectFunction(this, error); 326 if (!error.Success()) 327 code_addr = LLDB_INVALID_ADDRESS; 328 } 329 } else { 330 code_addr = GetLoadAddress(target); 331 } 332 333 if (code_addr == LLDB_INVALID_ADDRESS) 334 return code_addr; 335 336 if (target) 337 return target->GetCallableLoadAddress(code_addr, GetAddressClass()); 338 return code_addr; 339 } 340 341 bool Address::SetCallableLoadAddress(lldb::addr_t load_addr, Target *target) { 342 if (SetLoadAddress(load_addr, target)) { 343 if (target) 344 m_offset = target->GetCallableLoadAddress(m_offset, GetAddressClass()); 345 return true; 346 } 347 return false; 348 } 349 350 addr_t Address::GetOpcodeLoadAddress(Target *target, 351 AddressClass addr_class) const { 352 addr_t code_addr = GetLoadAddress(target); 353 if (code_addr != LLDB_INVALID_ADDRESS) { 354 if (addr_class == AddressClass::eInvalid) 355 addr_class = GetAddressClass(); 356 code_addr = target->GetOpcodeLoadAddress(code_addr, addr_class); 357 } 358 return code_addr; 359 } 360 361 bool Address::SetOpcodeLoadAddress(lldb::addr_t load_addr, Target *target, 362 AddressClass addr_class, 363 bool allow_section_end) { 364 if (SetLoadAddress(load_addr, target, allow_section_end)) { 365 if (target) { 366 if (addr_class == AddressClass::eInvalid) 367 addr_class = GetAddressClass(); 368 m_offset = target->GetOpcodeLoadAddress(m_offset, addr_class); 369 } 370 return true; 371 } 372 return false; 373 } 374 375 bool Address::Dump(Stream *s, ExecutionContextScope *exe_scope, DumpStyle style, 376 DumpStyle fallback_style, uint32_t addr_size) const { 377 // If the section was nullptr, only load address is going to work unless we 378 // are trying to deref a pointer 379 SectionSP section_sp(GetSection()); 380 if (!section_sp && style != DumpStyleResolvedPointerDescription) 381 style = DumpStyleLoadAddress; 382 383 ExecutionContext exe_ctx(exe_scope); 384 Target *target = exe_ctx.GetTargetPtr(); 385 // If addr_byte_size is UINT32_MAX, then determine the correct address byte 386 // size for the process or default to the size of addr_t 387 if (addr_size == UINT32_MAX) { 388 if (target) 389 addr_size = target->GetArchitecture().GetAddressByteSize(); 390 else 391 addr_size = sizeof(addr_t); 392 } 393 394 Address so_addr; 395 switch (style) { 396 case DumpStyleInvalid: 397 return false; 398 399 case DumpStyleSectionNameOffset: 400 if (section_sp) { 401 section_sp->DumpName(s); 402 s->Printf(" + %" PRIu64, m_offset); 403 } else { 404 s->Address(m_offset, addr_size); 405 } 406 break; 407 408 case DumpStyleSectionPointerOffset: 409 s->Printf("(Section *)%p + ", static_cast<void *>(section_sp.get())); 410 s->Address(m_offset, addr_size); 411 break; 412 413 case DumpStyleModuleWithFileAddress: 414 if (section_sp) { 415 ModuleSP module_sp = section_sp->GetModule(); 416 if (module_sp) 417 s->Printf("%s[", module_sp->GetFileSpec().GetFilename().AsCString( 418 "<Unknown>")); 419 else 420 s->Printf("%s[", "<Unknown>"); 421 } 422 LLVM_FALLTHROUGH; 423 case DumpStyleFileAddress: { 424 addr_t file_addr = GetFileAddress(); 425 if (file_addr == LLDB_INVALID_ADDRESS) { 426 if (fallback_style != DumpStyleInvalid) 427 return Dump(s, exe_scope, fallback_style, DumpStyleInvalid, addr_size); 428 return false; 429 } 430 s->Address(file_addr, addr_size); 431 if (style == DumpStyleModuleWithFileAddress && section_sp) 432 s->PutChar(']'); 433 } break; 434 435 case DumpStyleLoadAddress: { 436 addr_t load_addr = GetLoadAddress(target); 437 438 /* 439 * MIPS: 440 * Display address in compressed form for MIPS16 or microMIPS 441 * if the address belongs to AddressClass::eCodeAlternateISA. 442 */ 443 if (target) { 444 const llvm::Triple::ArchType llvm_arch = 445 target->GetArchitecture().GetMachine(); 446 if (llvm_arch == llvm::Triple::mips || 447 llvm_arch == llvm::Triple::mipsel || 448 llvm_arch == llvm::Triple::mips64 || 449 llvm_arch == llvm::Triple::mips64el) 450 load_addr = GetCallableLoadAddress(target); 451 } 452 453 if (load_addr == LLDB_INVALID_ADDRESS) { 454 if (fallback_style != DumpStyleInvalid) 455 return Dump(s, exe_scope, fallback_style, DumpStyleInvalid, addr_size); 456 return false; 457 } 458 s->Address(load_addr, addr_size); 459 } break; 460 461 case DumpStyleResolvedDescription: 462 case DumpStyleResolvedDescriptionNoModule: 463 case DumpStyleResolvedDescriptionNoFunctionArguments: 464 case DumpStyleNoFunctionName: 465 if (IsSectionOffset()) { 466 uint32_t pointer_size = 4; 467 ModuleSP module_sp(GetModule()); 468 if (target) 469 pointer_size = target->GetArchitecture().GetAddressByteSize(); 470 else if (module_sp) 471 pointer_size = module_sp->GetArchitecture().GetAddressByteSize(); 472 473 bool showed_info = false; 474 if (section_sp) { 475 SectionType sect_type = section_sp->GetType(); 476 switch (sect_type) { 477 case eSectionTypeData: 478 if (module_sp) { 479 SymbolVendor *sym_vendor = module_sp->GetSymbolVendor(); 480 if (sym_vendor) { 481 Symtab *symtab = sym_vendor->GetSymtab(); 482 if (symtab) { 483 const addr_t file_Addr = GetFileAddress(); 484 Symbol *symbol = 485 symtab->FindSymbolContainingFileAddress(file_Addr); 486 if (symbol) { 487 const char *symbol_name = symbol->GetName().AsCString(); 488 if (symbol_name) { 489 s->PutCString(symbol_name); 490 addr_t delta = 491 file_Addr - symbol->GetAddressRef().GetFileAddress(); 492 if (delta) 493 s->Printf(" + %" PRIu64, delta); 494 showed_info = true; 495 } 496 } 497 } 498 } 499 } 500 break; 501 502 case eSectionTypeDataCString: 503 // Read the C string from memory and display it 504 showed_info = true; 505 ReadCStringFromMemory(exe_scope, *this, s); 506 break; 507 508 case eSectionTypeDataCStringPointers: 509 if (ReadAddress(exe_scope, *this, pointer_size, so_addr)) { 510 #if VERBOSE_OUTPUT 511 s->PutCString("(char *)"); 512 so_addr.Dump(s, exe_scope, DumpStyleLoadAddress, 513 DumpStyleFileAddress); 514 s->PutCString(": "); 515 #endif 516 showed_info = true; 517 ReadCStringFromMemory(exe_scope, so_addr, s); 518 } 519 break; 520 521 case eSectionTypeDataObjCMessageRefs: 522 if (ReadAddress(exe_scope, *this, pointer_size, so_addr)) { 523 if (target && so_addr.IsSectionOffset()) { 524 SymbolContext func_sc; 525 target->GetImages().ResolveSymbolContextForAddress( 526 so_addr, eSymbolContextEverything, func_sc); 527 if (func_sc.function != nullptr || func_sc.symbol != nullptr) { 528 showed_info = true; 529 #if VERBOSE_OUTPUT 530 s->PutCString("(objc_msgref *) -> { (func*)"); 531 so_addr.Dump(s, exe_scope, DumpStyleLoadAddress, 532 DumpStyleFileAddress); 533 #else 534 s->PutCString("{ "); 535 #endif 536 Address cstr_addr(*this); 537 cstr_addr.SetOffset(cstr_addr.GetOffset() + pointer_size); 538 func_sc.DumpStopContext(s, exe_scope, so_addr, true, true, 539 false, true, true); 540 if (ReadAddress(exe_scope, cstr_addr, pointer_size, so_addr)) { 541 #if VERBOSE_OUTPUT 542 s->PutCString("), (char *)"); 543 so_addr.Dump(s, exe_scope, DumpStyleLoadAddress, 544 DumpStyleFileAddress); 545 s->PutCString(" ("); 546 #else 547 s->PutCString(", "); 548 #endif 549 ReadCStringFromMemory(exe_scope, so_addr, s); 550 } 551 #if VERBOSE_OUTPUT 552 s->PutCString(") }"); 553 #else 554 s->PutCString(" }"); 555 #endif 556 } 557 } 558 } 559 break; 560 561 case eSectionTypeDataObjCCFStrings: { 562 Address cfstring_data_addr(*this); 563 cfstring_data_addr.SetOffset(cfstring_data_addr.GetOffset() + 564 (2 * pointer_size)); 565 if (ReadAddress(exe_scope, cfstring_data_addr, pointer_size, 566 so_addr)) { 567 #if VERBOSE_OUTPUT 568 s->PutCString("(CFString *) "); 569 cfstring_data_addr.Dump(s, exe_scope, DumpStyleLoadAddress, 570 DumpStyleFileAddress); 571 s->PutCString(" -> @"); 572 #else 573 s->PutChar('@'); 574 #endif 575 if (so_addr.Dump(s, exe_scope, DumpStyleResolvedDescription)) 576 showed_info = true; 577 } 578 } break; 579 580 case eSectionTypeData4: 581 // Read the 4 byte data and display it 582 showed_info = true; 583 s->PutCString("(uint32_t) "); 584 DumpUInt(exe_scope, *this, 4, s); 585 break; 586 587 case eSectionTypeData8: 588 // Read the 8 byte data and display it 589 showed_info = true; 590 s->PutCString("(uint64_t) "); 591 DumpUInt(exe_scope, *this, 8, s); 592 break; 593 594 case eSectionTypeData16: 595 // Read the 16 byte data and display it 596 showed_info = true; 597 s->PutCString("(uint128_t) "); 598 DumpUInt(exe_scope, *this, 16, s); 599 break; 600 601 case eSectionTypeDataPointers: 602 // Read the pointer data and display it 603 if (ReadAddress(exe_scope, *this, pointer_size, so_addr)) { 604 s->PutCString("(void *)"); 605 so_addr.Dump(s, exe_scope, DumpStyleLoadAddress, 606 DumpStyleFileAddress); 607 608 showed_info = true; 609 if (so_addr.IsSectionOffset()) { 610 SymbolContext pointer_sc; 611 if (target) { 612 target->GetImages().ResolveSymbolContextForAddress( 613 so_addr, eSymbolContextEverything, pointer_sc); 614 if (pointer_sc.function != nullptr || 615 pointer_sc.symbol != nullptr) { 616 s->PutCString(": "); 617 pointer_sc.DumpStopContext(s, exe_scope, so_addr, true, false, 618 false, true, true); 619 } 620 } 621 } 622 } 623 break; 624 625 default: 626 break; 627 } 628 } 629 630 if (!showed_info) { 631 if (module_sp) { 632 SymbolContext sc; 633 module_sp->ResolveSymbolContextForAddress( 634 *this, eSymbolContextEverything, sc); 635 if (sc.function || sc.symbol) { 636 bool show_stop_context = true; 637 const bool show_module = (style == DumpStyleResolvedDescription); 638 const bool show_fullpaths = false; 639 const bool show_inlined_frames = true; 640 const bool show_function_arguments = 641 (style != DumpStyleResolvedDescriptionNoFunctionArguments); 642 const bool show_function_name = (style != DumpStyleNoFunctionName); 643 if (sc.function == nullptr && sc.symbol != nullptr) { 644 // If we have just a symbol make sure it is in the right section 645 if (sc.symbol->ValueIsAddress()) { 646 if (sc.symbol->GetAddressRef().GetSection() != GetSection()) { 647 // don't show the module if the symbol is a trampoline symbol 648 show_stop_context = false; 649 } 650 } 651 } 652 if (show_stop_context) { 653 // We have a function or a symbol from the same sections as this 654 // address. 655 sc.DumpStopContext(s, exe_scope, *this, show_fullpaths, 656 show_module, show_inlined_frames, 657 show_function_arguments, show_function_name); 658 } else { 659 // We found a symbol but it was in a different section so it 660 // isn't the symbol we should be showing, just show the section 661 // name + offset 662 Dump(s, exe_scope, DumpStyleSectionNameOffset); 663 } 664 } 665 } 666 } 667 } else { 668 if (fallback_style != DumpStyleInvalid) 669 return Dump(s, exe_scope, fallback_style, DumpStyleInvalid, addr_size); 670 return false; 671 } 672 break; 673 674 case DumpStyleDetailedSymbolContext: 675 if (IsSectionOffset()) { 676 ModuleSP module_sp(GetModule()); 677 if (module_sp) { 678 SymbolContext sc; 679 module_sp->ResolveSymbolContextForAddress( 680 *this, eSymbolContextEverything | eSymbolContextVariable, sc); 681 if (sc.symbol) { 682 // If we have just a symbol make sure it is in the same section as 683 // our address. If it isn't, then we might have just found the last 684 // symbol that came before the address that we are looking up that 685 // has nothing to do with our address lookup. 686 if (sc.symbol->ValueIsAddress() && 687 sc.symbol->GetAddressRef().GetSection() != GetSection()) 688 sc.symbol = nullptr; 689 } 690 sc.GetDescription(s, eDescriptionLevelBrief, target); 691 692 if (sc.block) { 693 bool can_create = true; 694 bool get_parent_variables = true; 695 bool stop_if_block_is_inlined_function = false; 696 VariableList variable_list; 697 sc.block->AppendVariables(can_create, get_parent_variables, 698 stop_if_block_is_inlined_function, 699 [](Variable *) { return true; }, 700 &variable_list); 701 702 const size_t num_variables = variable_list.GetSize(); 703 for (size_t var_idx = 0; var_idx < num_variables; ++var_idx) { 704 Variable *var = variable_list.GetVariableAtIndex(var_idx).get(); 705 if (var && var->LocationIsValidForAddress(*this)) { 706 s->Indent(); 707 s->Printf(" Variable: id = {0x%8.8" PRIx64 "}, name = \"%s\"", 708 var->GetID(), var->GetName().GetCString()); 709 Type *type = var->GetType(); 710 if (type) 711 s->Printf(", type = \"%s\"", type->GetName().GetCString()); 712 else 713 s->PutCString(", type = <unknown>"); 714 s->PutCString(", location = "); 715 var->DumpLocationForAddress(s, *this); 716 s->PutCString(", decl = "); 717 var->GetDeclaration().DumpStopContext(s, false); 718 s->EOL(); 719 } 720 } 721 } 722 } 723 } else { 724 if (fallback_style != DumpStyleInvalid) 725 return Dump(s, exe_scope, fallback_style, DumpStyleInvalid, addr_size); 726 return false; 727 } 728 break; 729 730 case DumpStyleResolvedPointerDescription: { 731 Process *process = exe_ctx.GetProcessPtr(); 732 if (process) { 733 addr_t load_addr = GetLoadAddress(target); 734 if (load_addr != LLDB_INVALID_ADDRESS) { 735 Status memory_error; 736 addr_t dereferenced_load_addr = 737 process->ReadPointerFromMemory(load_addr, memory_error); 738 if (dereferenced_load_addr != LLDB_INVALID_ADDRESS) { 739 Address dereferenced_addr; 740 if (dereferenced_addr.SetLoadAddress(dereferenced_load_addr, 741 target)) { 742 StreamString strm; 743 if (dereferenced_addr.Dump(&strm, exe_scope, 744 DumpStyleResolvedDescription, 745 DumpStyleInvalid, addr_size)) { 746 s->Address(dereferenced_load_addr, addr_size, " -> ", " "); 747 s->Write(strm.GetString().data(), strm.GetSize()); 748 return true; 749 } 750 } 751 } 752 } 753 } 754 if (fallback_style != DumpStyleInvalid) 755 return Dump(s, exe_scope, fallback_style, DumpStyleInvalid, addr_size); 756 return false; 757 } break; 758 } 759 760 return true; 761 } 762 763 bool Address::SectionWasDeleted() const { 764 if (GetSection()) 765 return false; 766 return SectionWasDeletedPrivate(); 767 } 768 769 bool Address::SectionWasDeletedPrivate() const { 770 lldb::SectionWP empty_section_wp; 771 772 // If either call to "std::weak_ptr::owner_before(...) value returns true, 773 // this indicates that m_section_wp once contained (possibly still does) a 774 // reference to a valid shared pointer. This helps us know if we had a valid 775 // reference to a section which is now invalid because the module it was in 776 // was unloaded/deleted, or if the address doesn't have a valid reference to 777 // a section. 778 return empty_section_wp.owner_before(m_section_wp) || 779 m_section_wp.owner_before(empty_section_wp); 780 } 781 782 uint32_t Address::CalculateSymbolContext(SymbolContext *sc, 783 uint32_t resolve_scope) const { 784 sc->Clear(false); 785 // Absolute addresses don't have enough information to reconstruct even their 786 // target. 787 788 SectionSP section_sp(GetSection()); 789 if (section_sp) { 790 ModuleSP module_sp(section_sp->GetModule()); 791 if (module_sp) { 792 sc->module_sp = module_sp; 793 if (sc->module_sp) 794 return sc->module_sp->ResolveSymbolContextForAddress( 795 *this, resolve_scope, *sc); 796 } 797 } 798 return 0; 799 } 800 801 ModuleSP Address::CalculateSymbolContextModule() const { 802 SectionSP section_sp(GetSection()); 803 if (section_sp) 804 return section_sp->GetModule(); 805 return ModuleSP(); 806 } 807 808 CompileUnit *Address::CalculateSymbolContextCompileUnit() const { 809 SectionSP section_sp(GetSection()); 810 if (section_sp) { 811 SymbolContext sc; 812 sc.module_sp = section_sp->GetModule(); 813 if (sc.module_sp) { 814 sc.module_sp->ResolveSymbolContextForAddress(*this, 815 eSymbolContextCompUnit, sc); 816 return sc.comp_unit; 817 } 818 } 819 return nullptr; 820 } 821 822 Function *Address::CalculateSymbolContextFunction() const { 823 SectionSP section_sp(GetSection()); 824 if (section_sp) { 825 SymbolContext sc; 826 sc.module_sp = section_sp->GetModule(); 827 if (sc.module_sp) { 828 sc.module_sp->ResolveSymbolContextForAddress(*this, 829 eSymbolContextFunction, sc); 830 return sc.function; 831 } 832 } 833 return nullptr; 834 } 835 836 Block *Address::CalculateSymbolContextBlock() const { 837 SectionSP section_sp(GetSection()); 838 if (section_sp) { 839 SymbolContext sc; 840 sc.module_sp = section_sp->GetModule(); 841 if (sc.module_sp) { 842 sc.module_sp->ResolveSymbolContextForAddress(*this, eSymbolContextBlock, 843 sc); 844 return sc.block; 845 } 846 } 847 return nullptr; 848 } 849 850 Symbol *Address::CalculateSymbolContextSymbol() const { 851 SectionSP section_sp(GetSection()); 852 if (section_sp) { 853 SymbolContext sc; 854 sc.module_sp = section_sp->GetModule(); 855 if (sc.module_sp) { 856 sc.module_sp->ResolveSymbolContextForAddress(*this, eSymbolContextSymbol, 857 sc); 858 return sc.symbol; 859 } 860 } 861 return nullptr; 862 } 863 864 bool Address::CalculateSymbolContextLineEntry(LineEntry &line_entry) const { 865 SectionSP section_sp(GetSection()); 866 if (section_sp) { 867 SymbolContext sc; 868 sc.module_sp = section_sp->GetModule(); 869 if (sc.module_sp) { 870 sc.module_sp->ResolveSymbolContextForAddress(*this, 871 eSymbolContextLineEntry, sc); 872 if (sc.line_entry.IsValid()) { 873 line_entry = sc.line_entry; 874 return true; 875 } 876 } 877 } 878 line_entry.Clear(); 879 return false; 880 } 881 882 int Address::CompareFileAddress(const Address &a, const Address &b) { 883 addr_t a_file_addr = a.GetFileAddress(); 884 addr_t b_file_addr = b.GetFileAddress(); 885 if (a_file_addr < b_file_addr) 886 return -1; 887 if (a_file_addr > b_file_addr) 888 return +1; 889 return 0; 890 } 891 892 int Address::CompareLoadAddress(const Address &a, const Address &b, 893 Target *target) { 894 assert(target != nullptr); 895 addr_t a_load_addr = a.GetLoadAddress(target); 896 addr_t b_load_addr = b.GetLoadAddress(target); 897 if (a_load_addr < b_load_addr) 898 return -1; 899 if (a_load_addr > b_load_addr) 900 return +1; 901 return 0; 902 } 903 904 int Address::CompareModulePointerAndOffset(const Address &a, const Address &b) { 905 ModuleSP a_module_sp(a.GetModule()); 906 ModuleSP b_module_sp(b.GetModule()); 907 Module *a_module = a_module_sp.get(); 908 Module *b_module = b_module_sp.get(); 909 if (a_module < b_module) 910 return -1; 911 if (a_module > b_module) 912 return +1; 913 // Modules are the same, just compare the file address since they should be 914 // unique 915 addr_t a_file_addr = a.GetFileAddress(); 916 addr_t b_file_addr = b.GetFileAddress(); 917 if (a_file_addr < b_file_addr) 918 return -1; 919 if (a_file_addr > b_file_addr) 920 return +1; 921 return 0; 922 } 923 924 size_t Address::MemorySize() const { 925 // Noting special for the memory size of a single Address object, it is just 926 // the size of itself. 927 return sizeof(Address); 928 } 929 930 //---------------------------------------------------------------------- 931 // NOTE: Be careful using this operator. It can correctly compare two 932 // addresses from the same Module correctly. It can't compare two addresses 933 // from different modules in any meaningful way, but it will compare the module 934 // pointers. 935 // 936 // To sum things up: 937 // - works great for addresses within the same module - it works for addresses 938 // across multiple modules, but don't expect the 939 // address results to make much sense 940 // 941 // This basically lets Address objects be used in ordered collection classes. 942 //---------------------------------------------------------------------- 943 944 bool lldb_private::operator<(const Address &lhs, const Address &rhs) { 945 ModuleSP lhs_module_sp(lhs.GetModule()); 946 ModuleSP rhs_module_sp(rhs.GetModule()); 947 Module *lhs_module = lhs_module_sp.get(); 948 Module *rhs_module = rhs_module_sp.get(); 949 if (lhs_module == rhs_module) { 950 // Addresses are in the same module, just compare the file addresses 951 return lhs.GetFileAddress() < rhs.GetFileAddress(); 952 } else { 953 // The addresses are from different modules, just use the module pointer 954 // value to get consistent ordering 955 return lhs_module < rhs_module; 956 } 957 } 958 959 bool lldb_private::operator>(const Address &lhs, const Address &rhs) { 960 ModuleSP lhs_module_sp(lhs.GetModule()); 961 ModuleSP rhs_module_sp(rhs.GetModule()); 962 Module *lhs_module = lhs_module_sp.get(); 963 Module *rhs_module = rhs_module_sp.get(); 964 if (lhs_module == rhs_module) { 965 // Addresses are in the same module, just compare the file addresses 966 return lhs.GetFileAddress() > rhs.GetFileAddress(); 967 } else { 968 // The addresses are from different modules, just use the module pointer 969 // value to get consistent ordering 970 return lhs_module > rhs_module; 971 } 972 } 973 974 // The operator == checks for exact equality only (same section, same offset) 975 bool lldb_private::operator==(const Address &a, const Address &rhs) { 976 return a.GetOffset() == rhs.GetOffset() && a.GetSection() == rhs.GetSection(); 977 } 978 979 // The operator != checks for exact inequality only (differing section, or 980 // different offset) 981 bool lldb_private::operator!=(const Address &a, const Address &rhs) { 982 return a.GetOffset() != rhs.GetOffset() || a.GetSection() != rhs.GetSection(); 983 } 984 985 AddressClass Address::GetAddressClass() const { 986 ModuleSP module_sp(GetModule()); 987 if (module_sp) { 988 ObjectFile *obj_file = module_sp->GetObjectFile(); 989 if (obj_file) { 990 // Give the symbol vendor a chance to add to the unified section list. 991 module_sp->GetSymbolVendor(); 992 return obj_file->GetAddressClass(GetFileAddress()); 993 } 994 } 995 return AddressClass::eUnknown; 996 } 997 998 bool Address::SetLoadAddress(lldb::addr_t load_addr, Target *target, 999 bool allow_section_end) { 1000 if (target && target->GetSectionLoadList().ResolveLoadAddress( 1001 load_addr, *this, allow_section_end)) 1002 return true; 1003 m_section_wp.reset(); 1004 m_offset = load_addr; 1005 return false; 1006 } 1007