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/Module.h" 12 #include "lldb/Core/Section.h" 13 #include "lldb/Symbol/Block.h" 14 #include "lldb/Symbol/ObjectFile.h" 15 #include "lldb/Symbol/Variable.h" 16 #include "lldb/Symbol/VariableList.h" 17 #include "lldb/Target/ExecutionContext.h" 18 #include "lldb/Target/Process.h" 19 #include "lldb/Target/SectionLoadList.h" 20 #include "lldb/Target/Target.h" 21 #include "lldb/Symbol/SymbolVendor.h" 22 23 #include "llvm/ADT/Triple.h" 24 25 using namespace lldb; 26 using namespace lldb_private; 27 28 static size_t 29 ReadBytes (ExecutionContextScope *exe_scope, const Address &address, void *dst, size_t dst_len) 30 { 31 if (exe_scope == NULL) 32 return 0; 33 34 TargetSP target_sp (exe_scope->CalculateTarget()); 35 if (target_sp) 36 { 37 Error error; 38 bool prefer_file_cache = false; 39 return target_sp->ReadMemory (address, prefer_file_cache, dst, dst_len, error); 40 } 41 return 0; 42 } 43 44 static bool 45 GetByteOrderAndAddressSize (ExecutionContextScope *exe_scope, const Address &address, ByteOrder& byte_order, uint32_t& addr_size) 46 { 47 byte_order = eByteOrderInvalid; 48 addr_size = 0; 49 if (exe_scope == NULL) 50 return false; 51 52 TargetSP target_sp (exe_scope->CalculateTarget()); 53 if (target_sp) 54 { 55 byte_order = target_sp->GetArchitecture().GetByteOrder(); 56 addr_size = target_sp->GetArchitecture().GetAddressByteSize(); 57 } 58 59 if (byte_order == eByteOrderInvalid || addr_size == 0) 60 { 61 ModuleSP module_sp (address.GetModule()); 62 if (module_sp) 63 { 64 byte_order = module_sp->GetArchitecture().GetByteOrder(); 65 addr_size = module_sp->GetArchitecture().GetAddressByteSize(); 66 } 67 } 68 return byte_order != eByteOrderInvalid && addr_size != 0; 69 } 70 71 static uint64_t 72 ReadUIntMax64 (ExecutionContextScope *exe_scope, const Address &address, uint32_t byte_size, bool &success) 73 { 74 uint64_t uval64 = 0; 75 if (exe_scope == NULL || byte_size > sizeof(uint64_t)) 76 { 77 success = false; 78 return 0; 79 } 80 uint64_t buf = 0; 81 82 success = ReadBytes (exe_scope, address, &buf, byte_size) == byte_size; 83 if (success) 84 { 85 ByteOrder byte_order = eByteOrderInvalid; 86 uint32_t addr_size = 0; 87 if (GetByteOrderAndAddressSize (exe_scope, address, byte_order, addr_size)) 88 { 89 DataExtractor data (&buf, sizeof(buf), byte_order, addr_size); 90 lldb::offset_t offset = 0; 91 uval64 = data.GetU64(&offset); 92 } 93 else 94 success = false; 95 } 96 return uval64; 97 } 98 99 static bool 100 ReadAddress (ExecutionContextScope *exe_scope, const Address &address, uint32_t pointer_size, Address &deref_so_addr) 101 { 102 if (exe_scope == NULL) 103 return false; 104 105 106 bool success = false; 107 addr_t deref_addr = ReadUIntMax64 (exe_scope, address, pointer_size, success); 108 if (success) 109 { 110 ExecutionContext exe_ctx; 111 exe_scope->CalculateExecutionContext(exe_ctx); 112 // If we have any sections that are loaded, try and resolve using the 113 // section load list 114 Target *target = exe_ctx.GetTargetPtr(); 115 if (target && !target->GetSectionLoadList().IsEmpty()) 116 { 117 if (target->GetSectionLoadList().ResolveLoadAddress (deref_addr, deref_so_addr)) 118 return true; 119 } 120 else 121 { 122 // If we were not running, yet able to read an integer, we must 123 // have a module 124 ModuleSP module_sp (address.GetModule()); 125 126 assert (module_sp); 127 if (module_sp->ResolveFileAddress(deref_addr, deref_so_addr)) 128 return true; 129 } 130 131 // We couldn't make "deref_addr" into a section offset value, but we were 132 // able to read the address, so we return a section offset address with 133 // no section and "deref_addr" as the offset (address). 134 deref_so_addr.SetRawAddress(deref_addr); 135 return true; 136 } 137 return false; 138 } 139 140 static bool 141 DumpUInt (ExecutionContextScope *exe_scope, const Address &address, uint32_t byte_size, Stream* strm) 142 { 143 if (exe_scope == NULL || byte_size == 0) 144 return 0; 145 std::vector<uint8_t> buf(byte_size, 0); 146 147 if (ReadBytes (exe_scope, address, &buf[0], buf.size()) == buf.size()) 148 { 149 ByteOrder byte_order = eByteOrderInvalid; 150 uint32_t addr_size = 0; 151 if (GetByteOrderAndAddressSize (exe_scope, address, byte_order, addr_size)) 152 { 153 DataExtractor data (&buf.front(), buf.size(), byte_order, addr_size); 154 155 data.Dump (strm, 156 0, // Start offset in "data" 157 eFormatHex, // Print as characters 158 buf.size(), // Size of item 159 1, // Items count 160 UINT32_MAX, // num per line 161 LLDB_INVALID_ADDRESS,// base address 162 0, // bitfield bit size 163 0); // bitfield bit offset 164 165 return true; 166 } 167 } 168 return false; 169 } 170 171 172 static size_t 173 ReadCStringFromMemory (ExecutionContextScope *exe_scope, const Address &address, Stream *strm) 174 { 175 if (exe_scope == NULL) 176 return 0; 177 const size_t k_buf_len = 256; 178 char buf[k_buf_len+1]; 179 buf[k_buf_len] = '\0'; // NULL terminate 180 181 // Byte order and address size don't matter for C string dumping.. 182 DataExtractor data (buf, sizeof(buf), lldb::endian::InlHostByteOrder(), 4); 183 size_t total_len = 0; 184 size_t bytes_read; 185 Address curr_address(address); 186 strm->PutChar ('"'); 187 while ((bytes_read = ReadBytes (exe_scope, curr_address, buf, k_buf_len)) > 0) 188 { 189 size_t len = strlen(buf); 190 if (len == 0) 191 break; 192 if (len > bytes_read) 193 len = bytes_read; 194 195 data.Dump (strm, 196 0, // Start offset in "data" 197 eFormatChar, // Print as characters 198 1, // Size of item (1 byte for a char!) 199 len, // How many bytes to print? 200 UINT32_MAX, // num per line 201 LLDB_INVALID_ADDRESS,// base address 202 0, // bitfield bit size 203 204 0); // bitfield bit offset 205 206 total_len += bytes_read; 207 208 if (len < k_buf_len) 209 break; 210 curr_address.SetOffset (curr_address.GetOffset() + bytes_read); 211 } 212 strm->PutChar ('"'); 213 return total_len; 214 } 215 216 Address::Address (lldb::addr_t abs_addr) : 217 m_section_wp (), 218 m_offset (abs_addr) 219 { 220 } 221 222 Address::Address (addr_t address, const SectionList *section_list) : 223 m_section_wp (), 224 m_offset (LLDB_INVALID_ADDRESS) 225 { 226 ResolveAddressUsingFileSections(address, section_list); 227 } 228 229 const Address& 230 Address::operator= (const Address& rhs) 231 { 232 if (this != &rhs) 233 { 234 m_section_wp = rhs.m_section_wp; 235 m_offset = rhs.m_offset.load(); 236 } 237 return *this; 238 } 239 240 bool 241 Address::ResolveAddressUsingFileSections (addr_t file_addr, const SectionList *section_list) 242 { 243 if (section_list) 244 { 245 SectionSP section_sp (section_list->FindSectionContainingFileAddress(file_addr)); 246 m_section_wp = section_sp; 247 if (section_sp) 248 { 249 assert( section_sp->ContainsFileAddress(file_addr) ); 250 m_offset = file_addr - section_sp->GetFileAddress(); 251 return true; // Successfully transformed addr into a section offset address 252 } 253 } 254 m_offset = file_addr; 255 return false; // Failed to resolve this address to a section offset value 256 } 257 258 ModuleSP 259 Address::GetModule () const 260 { 261 lldb::ModuleSP module_sp; 262 SectionSP section_sp (GetSection()); 263 if (section_sp) 264 module_sp = section_sp->GetModule(); 265 return module_sp; 266 } 267 268 addr_t 269 Address::GetFileAddress () const 270 { 271 SectionSP section_sp (GetSection()); 272 if (section_sp) 273 { 274 addr_t sect_file_addr = section_sp->GetFileAddress(); 275 if (sect_file_addr == LLDB_INVALID_ADDRESS) 276 { 277 // Section isn't resolved, we can't return a valid file address 278 return LLDB_INVALID_ADDRESS; 279 } 280 // We have a valid file range, so we can return the file based 281 // address by adding the file base address to our offset 282 return sect_file_addr + m_offset; 283 } 284 else if (SectionWasDeletedPrivate()) 285 { 286 // Used to have a valid section but it got deleted so the 287 // offset doesn't mean anything without the section 288 return LLDB_INVALID_ADDRESS; 289 } 290 // No section, we just return the offset since it is the value in this case 291 return m_offset; 292 } 293 294 addr_t 295 Address::GetLoadAddress (Target *target) const 296 { 297 SectionSP section_sp (GetSection()); 298 if (section_sp) 299 { 300 if (target) 301 { 302 addr_t sect_load_addr = section_sp->GetLoadBaseAddress (target); 303 304 if (sect_load_addr != LLDB_INVALID_ADDRESS) 305 { 306 // We have a valid file range, so we can return the file based 307 // address by adding the file base address to our offset 308 return sect_load_addr + m_offset; 309 } 310 } 311 } 312 else if (SectionWasDeletedPrivate()) 313 { 314 // Used to have a valid section but it got deleted so the 315 // offset doesn't mean anything without the section 316 return LLDB_INVALID_ADDRESS; 317 } 318 else 319 { 320 // We don't have a section so the offset is the load address 321 return m_offset; 322 } 323 // The section isn't resolved or an invalid target was passed in 324 // so we can't return a valid load address. 325 return LLDB_INVALID_ADDRESS; 326 } 327 328 addr_t 329 Address::GetCallableLoadAddress (Target *target, bool is_indirect) const 330 { 331 addr_t code_addr = LLDB_INVALID_ADDRESS; 332 333 if (is_indirect && target) 334 { 335 ProcessSP processSP = target->GetProcessSP(); 336 Error error; 337 if (processSP.get()) 338 { 339 code_addr = processSP->ResolveIndirectFunction(this, error); 340 if (!error.Success()) 341 code_addr = LLDB_INVALID_ADDRESS; 342 } 343 } 344 else 345 { 346 code_addr = GetLoadAddress (target); 347 } 348 349 if (code_addr == LLDB_INVALID_ADDRESS) 350 return code_addr; 351 352 if (target) 353 return target->GetCallableLoadAddress (code_addr, GetAddressClass()); 354 return code_addr; 355 } 356 357 bool 358 Address::SetCallableLoadAddress (lldb::addr_t load_addr, Target *target) 359 { 360 if (SetLoadAddress (load_addr, target)) 361 { 362 if (target) 363 m_offset = target->GetCallableLoadAddress(m_offset, GetAddressClass()); 364 return true; 365 } 366 return false; 367 } 368 369 addr_t 370 Address::GetOpcodeLoadAddress (Target *target) const 371 { 372 addr_t code_addr = GetLoadAddress (target); 373 if (code_addr != LLDB_INVALID_ADDRESS) 374 code_addr = target->GetOpcodeLoadAddress (code_addr, GetAddressClass()); 375 return code_addr; 376 } 377 378 bool 379 Address::SetOpcodeLoadAddress (lldb::addr_t load_addr, Target *target) 380 { 381 if (SetLoadAddress (load_addr, target)) 382 { 383 if (target) 384 m_offset = target->GetOpcodeLoadAddress (m_offset, GetAddressClass()); 385 return true; 386 } 387 return false; 388 } 389 390 bool 391 Address::Dump (Stream *s, ExecutionContextScope *exe_scope, DumpStyle style, DumpStyle fallback_style, uint32_t addr_size) const 392 { 393 // If the section was NULL, only load address is going to work unless we are 394 // trying to deref a pointer 395 SectionSP section_sp (GetSection()); 396 if (!section_sp && style != DumpStyleResolvedPointerDescription) 397 style = DumpStyleLoadAddress; 398 399 ExecutionContext exe_ctx (exe_scope); 400 Target *target = exe_ctx.GetTargetPtr(); 401 // If addr_byte_size is UINT32_MAX, then determine the correct address 402 // byte size for the process or default to the size of addr_t 403 if (addr_size == UINT32_MAX) 404 { 405 if (target) 406 addr_size = target->GetArchitecture().GetAddressByteSize (); 407 else 408 addr_size = sizeof(addr_t); 409 } 410 411 Address so_addr; 412 switch (style) 413 { 414 case DumpStyleInvalid: 415 return false; 416 417 case DumpStyleSectionNameOffset: 418 if (section_sp) 419 { 420 section_sp->DumpName(s); 421 s->Printf (" + %" PRIu64, m_offset.load()); 422 } 423 else 424 { 425 s->Address(m_offset, addr_size); 426 } 427 break; 428 429 case DumpStyleSectionPointerOffset: 430 s->Printf("(Section *)%p + ", static_cast<void*>(section_sp.get())); 431 s->Address(m_offset, addr_size); 432 break; 433 434 case DumpStyleModuleWithFileAddress: 435 if (section_sp) 436 { 437 s->Printf("%s[", section_sp->GetModule()->GetFileSpec().GetFilename().AsCString("<Unknown>")); 438 } 439 // Fall through 440 case DumpStyleFileAddress: 441 { 442 addr_t file_addr = GetFileAddress(); 443 if (file_addr == LLDB_INVALID_ADDRESS) 444 { 445 if (fallback_style != DumpStyleInvalid) 446 return Dump (s, exe_scope, fallback_style, DumpStyleInvalid, addr_size); 447 return false; 448 } 449 s->Address (file_addr, addr_size); 450 if (style == DumpStyleModuleWithFileAddress && section_sp) 451 s->PutChar(']'); 452 } 453 break; 454 455 case DumpStyleLoadAddress: 456 { 457 addr_t load_addr = GetLoadAddress (target); 458 if (load_addr == LLDB_INVALID_ADDRESS) 459 { 460 if (fallback_style != DumpStyleInvalid) 461 return Dump (s, exe_scope, fallback_style, DumpStyleInvalid, addr_size); 462 return false; 463 } 464 s->Address (load_addr, addr_size); 465 } 466 break; 467 468 case DumpStyleResolvedDescription: 469 case DumpStyleResolvedDescriptionNoModule: 470 case DumpStyleResolvedDescriptionNoFunctionArguments: 471 if (IsSectionOffset()) 472 { 473 uint32_t pointer_size = 4; 474 ModuleSP module_sp (GetModule()); 475 if (target) 476 pointer_size = target->GetArchitecture().GetAddressByteSize(); 477 else if (module_sp) 478 pointer_size = module_sp->GetArchitecture().GetAddressByteSize(); 479 480 bool showed_info = false; 481 if (section_sp) 482 { 483 SectionType sect_type = section_sp->GetType(); 484 switch (sect_type) 485 { 486 case eSectionTypeData: 487 if (module_sp) 488 { 489 SymbolVendor *sym_vendor = module_sp->GetSymbolVendor(); 490 if (sym_vendor) 491 { 492 Symtab *symtab = sym_vendor->GetSymtab(); 493 if (symtab) 494 { 495 const addr_t file_Addr = GetFileAddress(); 496 Symbol *symbol = symtab->FindSymbolContainingFileAddress (file_Addr); 497 if (symbol) 498 { 499 const char *symbol_name = symbol->GetName().AsCString(); 500 if (symbol_name) 501 { 502 s->PutCString(symbol_name); 503 addr_t delta = file_Addr - symbol->GetAddress().GetFileAddress(); 504 if (delta) 505 s->Printf(" + %" PRIu64, delta); 506 showed_info = true; 507 } 508 } 509 } 510 } 511 } 512 break; 513 514 case eSectionTypeDataCString: 515 // Read the C string from memory and display it 516 showed_info = true; 517 ReadCStringFromMemory (exe_scope, *this, s); 518 break; 519 520 case eSectionTypeDataCStringPointers: 521 { 522 if (ReadAddress (exe_scope, *this, pointer_size, so_addr)) 523 { 524 #if VERBOSE_OUTPUT 525 s->PutCString("(char *)"); 526 so_addr.Dump(s, exe_scope, DumpStyleLoadAddress, DumpStyleFileAddress); 527 s->PutCString(": "); 528 #endif 529 showed_info = true; 530 ReadCStringFromMemory (exe_scope, so_addr, s); 531 } 532 } 533 break; 534 535 case eSectionTypeDataObjCMessageRefs: 536 { 537 if (ReadAddress (exe_scope, *this, pointer_size, so_addr)) 538 { 539 if (target && so_addr.IsSectionOffset()) 540 { 541 SymbolContext func_sc; 542 target->GetImages().ResolveSymbolContextForAddress (so_addr, 543 eSymbolContextEverything, 544 func_sc); 545 if (func_sc.function || func_sc.symbol) 546 { 547 showed_info = true; 548 #if VERBOSE_OUTPUT 549 s->PutCString ("(objc_msgref *) -> { (func*)"); 550 so_addr.Dump(s, exe_scope, DumpStyleLoadAddress, DumpStyleFileAddress); 551 #else 552 s->PutCString ("{ "); 553 #endif 554 Address cstr_addr(*this); 555 cstr_addr.SetOffset(cstr_addr.GetOffset() + pointer_size); 556 func_sc.DumpStopContext(s, exe_scope, so_addr, true, true, false, true); 557 if (ReadAddress (exe_scope, cstr_addr, pointer_size, so_addr)) 558 { 559 #if VERBOSE_OUTPUT 560 s->PutCString("), (char *)"); 561 so_addr.Dump(s, exe_scope, DumpStyleLoadAddress, DumpStyleFileAddress); 562 s->PutCString(" ("); 563 #else 564 s->PutCString(", "); 565 #endif 566 ReadCStringFromMemory (exe_scope, so_addr, s); 567 } 568 #if VERBOSE_OUTPUT 569 s->PutCString(") }"); 570 #else 571 s->PutCString(" }"); 572 #endif 573 } 574 } 575 } 576 } 577 break; 578 579 case eSectionTypeDataObjCCFStrings: 580 { 581 Address cfstring_data_addr(*this); 582 cfstring_data_addr.SetOffset(cfstring_data_addr.GetOffset() + (2 * pointer_size)); 583 if (ReadAddress (exe_scope, cfstring_data_addr, pointer_size, so_addr)) 584 { 585 #if VERBOSE_OUTPUT 586 s->PutCString("(CFString *) "); 587 cfstring_data_addr.Dump(s, exe_scope, DumpStyleLoadAddress, DumpStyleFileAddress); 588 s->PutCString(" -> @"); 589 #else 590 s->PutChar('@'); 591 #endif 592 if (so_addr.Dump(s, exe_scope, DumpStyleResolvedDescription)) 593 showed_info = true; 594 } 595 } 596 break; 597 598 case eSectionTypeData4: 599 // Read the 4 byte data and display it 600 showed_info = true; 601 s->PutCString("(uint32_t) "); 602 DumpUInt (exe_scope, *this, 4, s); 603 break; 604 605 case eSectionTypeData8: 606 // Read the 8 byte data and display it 607 showed_info = true; 608 s->PutCString("(uint64_t) "); 609 DumpUInt (exe_scope, *this, 8, s); 610 break; 611 612 case eSectionTypeData16: 613 // Read the 16 byte data and display it 614 showed_info = true; 615 s->PutCString("(uint128_t) "); 616 DumpUInt (exe_scope, *this, 16, s); 617 break; 618 619 case eSectionTypeDataPointers: 620 // Read the pointer data and display it 621 { 622 if (ReadAddress (exe_scope, *this, pointer_size, so_addr)) 623 { 624 s->PutCString ("(void *)"); 625 so_addr.Dump(s, exe_scope, DumpStyleLoadAddress, DumpStyleFileAddress); 626 627 showed_info = true; 628 if (so_addr.IsSectionOffset()) 629 { 630 SymbolContext pointer_sc; 631 if (target) 632 { 633 target->GetImages().ResolveSymbolContextForAddress (so_addr, 634 eSymbolContextEverything, 635 pointer_sc); 636 if (pointer_sc.function || pointer_sc.symbol) 637 { 638 s->PutCString(": "); 639 pointer_sc.DumpStopContext(s, exe_scope, so_addr, true, false, false, true); 640 } 641 } 642 } 643 } 644 } 645 break; 646 647 default: 648 break; 649 } 650 } 651 652 if (!showed_info) 653 { 654 if (module_sp) 655 { 656 SymbolContext sc; 657 module_sp->ResolveSymbolContextForAddress(*this, eSymbolContextEverything | eSymbolContextVariable, sc); 658 if (sc.function || sc.symbol) 659 { 660 bool show_stop_context = true; 661 const bool show_module = (style == DumpStyleResolvedDescription); 662 const bool show_fullpaths = false; 663 const bool show_inlined_frames = true; 664 const bool show_function_arguments = (style != DumpStyleResolvedDescriptionNoFunctionArguments); 665 if (sc.function == NULL && sc.symbol != NULL) 666 { 667 // If we have just a symbol make sure it is in the right section 668 if (sc.symbol->ValueIsAddress()) 669 { 670 if (sc.symbol->GetAddress().GetSection() != GetSection()) 671 { 672 // don't show the module if the symbol is a trampoline symbol 673 show_stop_context = false; 674 } 675 } 676 } 677 if (show_stop_context) 678 { 679 // We have a function or a symbol from the same 680 // sections as this address. 681 sc.DumpStopContext (s, 682 exe_scope, 683 *this, 684 show_fullpaths, 685 show_module, 686 show_inlined_frames, 687 show_function_arguments); 688 } 689 else 690 { 691 // We found a symbol but it was in a different 692 // section so it isn't the symbol we should be 693 // showing, just show the section name + offset 694 Dump (s, exe_scope, DumpStyleSectionNameOffset); 695 } 696 } 697 } 698 } 699 } 700 else 701 { 702 if (fallback_style != DumpStyleInvalid) 703 return Dump (s, exe_scope, fallback_style, DumpStyleInvalid, addr_size); 704 return false; 705 } 706 break; 707 708 case DumpStyleDetailedSymbolContext: 709 if (IsSectionOffset()) 710 { 711 ModuleSP module_sp (GetModule()); 712 if (module_sp) 713 { 714 SymbolContext sc; 715 module_sp->ResolveSymbolContextForAddress(*this, eSymbolContextEverything | eSymbolContextVariable, sc); 716 if (sc.symbol) 717 { 718 // If we have just a symbol make sure it is in the same section 719 // as our address. If it isn't, then we might have just found 720 // the last symbol that came before the address that we are 721 // looking up that has nothing to do with our address lookup. 722 if (sc.symbol->ValueIsAddress() && sc.symbol->GetAddress().GetSection() != GetSection()) 723 sc.symbol = NULL; 724 } 725 sc.GetDescription(s, eDescriptionLevelBrief, target); 726 727 if (sc.block) 728 { 729 bool can_create = true; 730 bool get_parent_variables = true; 731 bool stop_if_block_is_inlined_function = false; 732 VariableList variable_list; 733 sc.block->AppendVariables (can_create, 734 get_parent_variables, 735 stop_if_block_is_inlined_function, 736 &variable_list); 737 738 const size_t num_variables = variable_list.GetSize(); 739 for (size_t var_idx = 0; var_idx < num_variables; ++var_idx) 740 { 741 Variable *var = variable_list.GetVariableAtIndex (var_idx).get(); 742 if (var && var->LocationIsValidForAddress (*this)) 743 { 744 s->Indent(); 745 s->Printf (" Variable: id = {0x%8.8" PRIx64 "}, name = \"%s\", type= \"%s\", location =", 746 var->GetID(), 747 var->GetName().GetCString(), 748 var->GetType()->GetName().GetCString()); 749 var->DumpLocationForAddress(s, *this); 750 s->PutCString(", decl = "); 751 var->GetDeclaration().DumpStopContext(s, false); 752 s->EOL(); 753 } 754 } 755 } 756 } 757 } 758 else 759 { 760 if (fallback_style != DumpStyleInvalid) 761 return Dump (s, exe_scope, fallback_style, DumpStyleInvalid, addr_size); 762 return false; 763 } 764 break; 765 case DumpStyleResolvedPointerDescription: 766 { 767 Process *process = exe_ctx.GetProcessPtr(); 768 if (process) 769 { 770 addr_t load_addr = GetLoadAddress (target); 771 if (load_addr != LLDB_INVALID_ADDRESS) 772 { 773 Error memory_error; 774 addr_t dereferenced_load_addr = process->ReadPointerFromMemory(load_addr, memory_error); 775 if (dereferenced_load_addr != LLDB_INVALID_ADDRESS) 776 { 777 Address dereferenced_addr; 778 if (dereferenced_addr.SetLoadAddress(dereferenced_load_addr, target)) 779 { 780 StreamString strm; 781 if (dereferenced_addr.Dump (&strm, exe_scope, DumpStyleResolvedDescription, DumpStyleInvalid, addr_size)) 782 { 783 s->Address (dereferenced_load_addr, addr_size, " -> ", " "); 784 s->Write(strm.GetData(), strm.GetSize()); 785 return true; 786 } 787 } 788 } 789 } 790 } 791 if (fallback_style != DumpStyleInvalid) 792 return Dump (s, exe_scope, fallback_style, DumpStyleInvalid, addr_size); 793 return false; 794 } 795 break; 796 } 797 798 return true; 799 } 800 801 bool 802 Address::SectionWasDeleted() const 803 { 804 if (GetSection()) 805 return false; 806 return SectionWasDeletedPrivate(); 807 } 808 809 bool 810 Address::SectionWasDeletedPrivate() const 811 { 812 lldb::SectionWP empty_section_wp; 813 814 // If either call to "std::weak_ptr::owner_before(...) value returns true, this 815 // indicates that m_section_wp once contained (possibly still does) a reference 816 // to a valid shared pointer. This helps us know if we had a valid reference to 817 // a section which is now invalid because the module it was in was unloaded/deleted, 818 // or if the address doesn't have a valid reference to a section. 819 return empty_section_wp.owner_before(m_section_wp) || m_section_wp.owner_before(empty_section_wp); 820 } 821 822 uint32_t 823 Address::CalculateSymbolContext (SymbolContext *sc, uint32_t resolve_scope) const 824 { 825 sc->Clear(false); 826 // Absolute addresses don't have enough information to reconstruct even their target. 827 828 SectionSP section_sp (GetSection()); 829 if (section_sp) 830 { 831 ModuleSP module_sp (section_sp->GetModule()); 832 if (module_sp) 833 { 834 sc->module_sp = module_sp; 835 if (sc->module_sp) 836 return sc->module_sp->ResolveSymbolContextForAddress (*this, resolve_scope, *sc); 837 } 838 } 839 return 0; 840 } 841 842 ModuleSP 843 Address::CalculateSymbolContextModule () const 844 { 845 SectionSP section_sp (GetSection()); 846 if (section_sp) 847 return section_sp->GetModule(); 848 return ModuleSP(); 849 } 850 851 CompileUnit * 852 Address::CalculateSymbolContextCompileUnit () const 853 { 854 SectionSP section_sp (GetSection()); 855 if (section_sp) 856 { 857 SymbolContext sc; 858 sc.module_sp = section_sp->GetModule(); 859 if (sc.module_sp) 860 { 861 sc.module_sp->ResolveSymbolContextForAddress (*this, eSymbolContextCompUnit, sc); 862 return sc.comp_unit; 863 } 864 } 865 return NULL; 866 } 867 868 Function * 869 Address::CalculateSymbolContextFunction () const 870 { 871 SectionSP section_sp (GetSection()); 872 if (section_sp) 873 { 874 SymbolContext sc; 875 sc.module_sp = section_sp->GetModule(); 876 if (sc.module_sp) 877 { 878 sc.module_sp->ResolveSymbolContextForAddress (*this, eSymbolContextFunction, sc); 879 return sc.function; 880 } 881 } 882 return NULL; 883 } 884 885 Block * 886 Address::CalculateSymbolContextBlock () const 887 { 888 SectionSP section_sp (GetSection()); 889 if (section_sp) 890 { 891 SymbolContext sc; 892 sc.module_sp = section_sp->GetModule(); 893 if (sc.module_sp) 894 { 895 sc.module_sp->ResolveSymbolContextForAddress (*this, eSymbolContextBlock, sc); 896 return sc.block; 897 } 898 } 899 return NULL; 900 } 901 902 Symbol * 903 Address::CalculateSymbolContextSymbol () const 904 { 905 SectionSP section_sp (GetSection()); 906 if (section_sp) 907 { 908 SymbolContext sc; 909 sc.module_sp = section_sp->GetModule(); 910 if (sc.module_sp) 911 { 912 sc.module_sp->ResolveSymbolContextForAddress (*this, eSymbolContextSymbol, sc); 913 return sc.symbol; 914 } 915 } 916 return NULL; 917 } 918 919 bool 920 Address::CalculateSymbolContextLineEntry (LineEntry &line_entry) const 921 { 922 SectionSP section_sp (GetSection()); 923 if (section_sp) 924 { 925 SymbolContext sc; 926 sc.module_sp = section_sp->GetModule(); 927 if (sc.module_sp) 928 { 929 sc.module_sp->ResolveSymbolContextForAddress (*this, eSymbolContextLineEntry, sc); 930 if (sc.line_entry.IsValid()) 931 { 932 line_entry = sc.line_entry; 933 return true; 934 } 935 } 936 } 937 line_entry.Clear(); 938 return false; 939 } 940 941 int 942 Address::CompareFileAddress (const Address& a, const Address& b) 943 { 944 addr_t a_file_addr = a.GetFileAddress(); 945 addr_t b_file_addr = b.GetFileAddress(); 946 if (a_file_addr < b_file_addr) 947 return -1; 948 if (a_file_addr > b_file_addr) 949 return +1; 950 return 0; 951 } 952 953 954 int 955 Address::CompareLoadAddress (const Address& a, const Address& b, Target *target) 956 { 957 assert (target != NULL); 958 addr_t a_load_addr = a.GetLoadAddress (target); 959 addr_t b_load_addr = b.GetLoadAddress (target); 960 if (a_load_addr < b_load_addr) 961 return -1; 962 if (a_load_addr > b_load_addr) 963 return +1; 964 return 0; 965 } 966 967 int 968 Address::CompareModulePointerAndOffset (const Address& a, const Address& b) 969 { 970 ModuleSP a_module_sp (a.GetModule()); 971 ModuleSP b_module_sp (b.GetModule()); 972 Module *a_module = a_module_sp.get(); 973 Module *b_module = b_module_sp.get(); 974 if (a_module < b_module) 975 return -1; 976 if (a_module > b_module) 977 return +1; 978 // Modules are the same, just compare the file address since they should 979 // be unique 980 addr_t a_file_addr = a.GetFileAddress(); 981 addr_t b_file_addr = b.GetFileAddress(); 982 if (a_file_addr < b_file_addr) 983 return -1; 984 if (a_file_addr > b_file_addr) 985 return +1; 986 return 0; 987 } 988 989 990 size_t 991 Address::MemorySize () const 992 { 993 // Noting special for the memory size of a single Address object, 994 // it is just the size of itself. 995 return sizeof(Address); 996 } 997 998 999 //---------------------------------------------------------------------- 1000 // NOTE: Be careful using this operator. It can correctly compare two 1001 // addresses from the same Module correctly. It can't compare two 1002 // addresses from different modules in any meaningful way, but it will 1003 // compare the module pointers. 1004 // 1005 // To sum things up: 1006 // - works great for addresses within the same module 1007 // - it works for addresses across multiple modules, but don't expect the 1008 // address results to make much sense 1009 // 1010 // This basically lets Address objects be used in ordered collection 1011 // classes. 1012 //---------------------------------------------------------------------- 1013 1014 bool 1015 lldb_private::operator< (const Address& lhs, const Address& rhs) 1016 { 1017 ModuleSP lhs_module_sp (lhs.GetModule()); 1018 ModuleSP rhs_module_sp (rhs.GetModule()); 1019 Module *lhs_module = lhs_module_sp.get(); 1020 Module *rhs_module = rhs_module_sp.get(); 1021 if (lhs_module == rhs_module) 1022 { 1023 // Addresses are in the same module, just compare the file addresses 1024 return lhs.GetFileAddress() < rhs.GetFileAddress(); 1025 } 1026 else 1027 { 1028 // The addresses are from different modules, just use the module 1029 // pointer value to get consistent ordering 1030 return lhs_module < rhs_module; 1031 } 1032 } 1033 1034 bool 1035 lldb_private::operator> (const Address& lhs, const Address& rhs) 1036 { 1037 ModuleSP lhs_module_sp (lhs.GetModule()); 1038 ModuleSP rhs_module_sp (rhs.GetModule()); 1039 Module *lhs_module = lhs_module_sp.get(); 1040 Module *rhs_module = rhs_module_sp.get(); 1041 if (lhs_module == rhs_module) 1042 { 1043 // Addresses are in the same module, just compare the file addresses 1044 return lhs.GetFileAddress() > rhs.GetFileAddress(); 1045 } 1046 else 1047 { 1048 // The addresses are from different modules, just use the module 1049 // pointer value to get consistent ordering 1050 return lhs_module > rhs_module; 1051 } 1052 } 1053 1054 1055 // The operator == checks for exact equality only (same section, same offset) 1056 bool 1057 lldb_private::operator== (const Address& a, const Address& rhs) 1058 { 1059 return a.GetOffset() == rhs.GetOffset() && 1060 a.GetSection() == rhs.GetSection(); 1061 } 1062 // The operator != checks for exact inequality only (differing section, or 1063 // different offset) 1064 bool 1065 lldb_private::operator!= (const Address& a, const Address& rhs) 1066 { 1067 return a.GetOffset() != rhs.GetOffset() || 1068 a.GetSection() != rhs.GetSection(); 1069 } 1070 1071 AddressClass 1072 Address::GetAddressClass () const 1073 { 1074 ModuleSP module_sp (GetModule()); 1075 if (module_sp) 1076 { 1077 ObjectFile *obj_file = module_sp->GetObjectFile(); 1078 if (obj_file) 1079 { 1080 // Give the symbol vendor a chance to add to the unified section list. 1081 module_sp->GetSymbolVendor(); 1082 return obj_file->GetAddressClass (GetFileAddress()); 1083 } 1084 } 1085 return eAddressClassUnknown; 1086 } 1087 1088 bool 1089 Address::SetLoadAddress (lldb::addr_t load_addr, Target *target) 1090 { 1091 if (target && target->GetSectionLoadList().ResolveLoadAddress(load_addr, *this)) 1092 return true; 1093 m_section_wp.reset(); 1094 m_offset = load_addr; 1095 return false; 1096 } 1097 1098