tools/llvm-cxxdump/llvm-cxxdump.cpp

   1 //===- llvm-cxxdump.cpp - Dump C++ data in an Object File -------*- C++ -*-===//
   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 // Dumps C++ data resident in object files and archives.
  10 //
  11 //===----------------------------------------------------------------------===//
  12
  13 #include "llvm-cxxdump.h"
  14 #include "Error.h"
  15 #include "llvm/ADT/ArrayRef.h"
  16 #include "llvm/Object/Archive.h"
  17 #include "llvm/Object/ObjectFile.h"
  18 #include "llvm/Object/SymbolSize.h"
  19 #include "llvm/Support/Debug.h"
  20 #include "llvm/Support/Endian.h"
  21 #include "llvm/Support/FileSystem.h"
  22 #include "llvm/Support/InitLLVM.h"
  23 #include "llvm/Support/TargetRegistry.h"
  24 #include "llvm/Support/TargetSelect.h"
  25 #include "llvm/Support/WithColor.h"
  26 #include "llvm/Support/raw_ostream.h"
  27 #include <map>
  28 #include <string>
  29 #include <system_error>
  30
  31 using namespace llvm;
  32 using namespace llvm::object;
  33 using namespace llvm::support;
  34
  35 namespace opts {
  36 cl::list<std::string> InputFilenames(cl::Positional,
  37                                      cl::desc("<input object files>"),
  38                                      cl::ZeroOrMore);
  39 } // namespace opts
  40
  41 namespace llvm {
  42
  43 static void error(std::error_code EC) {
  44   if (!EC)
  45     return;
  46   WithColor::error(outs(), "") << "reading file: " << EC.message() << ".\n";
  47   outs().flush();
  48   exit(1);
  49 }
  50
  51 static void error(Error Err) {
  52   if (!Err)
  53     return;
  54   logAllUnhandledErrors(std::move(Err), WithColor::error(outs()),
  55                         "reading file: ");
  56   outs().flush();
  57   exit(1);
  58 }
  59
  60 } // namespace llvm
  61
  62 static void reportError(StringRef Input, StringRef Message) {
  63   if (Input == "-")
  64     Input = "<stdin>";
  65   WithColor::error(errs(), Input) << Message << "\n";
  66   errs().flush();
  67   exit(1);
  68 }
  69
  70 static void reportError(StringRef Input, std::error_code EC) {
  71   reportError(Input, EC.message());
  72 }
  73
  74 static std::map<SectionRef, SmallVector<SectionRef, 1>> SectionRelocMap;
  75
  76 static void collectRelocatedSymbols(const ObjectFile *Obj,
  77                                     const SectionRef &Sec, uint64_t SecAddress,
  78                                     uint64_t SymAddress, uint64_t SymSize,
  79                                     StringRef *I, StringRef *E) {
  80   uint64_t SymOffset = SymAddress - SecAddress;
  81   uint64_t SymEnd = SymOffset + SymSize;
  82   for (const SectionRef &SR : SectionRelocMap[Sec]) {
  83     for (const object::RelocationRef &Reloc : SR.relocations()) {
  84       if (I == E)
  85         break;
  86       const object::symbol_iterator RelocSymI = Reloc.getSymbol();
  87       if (RelocSymI == Obj->symbol_end())
  88         continue;
  89       Expected<StringRef> RelocSymName = RelocSymI->getName();
  90       error(errorToErrorCode(RelocSymName.takeError()));
  91       uint64_t Offset = Reloc.getOffset();
  92       if (Offset >= SymOffset && Offset < SymEnd) {
  93         *I = *RelocSymName;
  94         ++I;
  95       }
  96     }
  97   }
  98 }
  99
 100 static void collectRelocationOffsets(
 101     const ObjectFile *Obj, const SectionRef &Sec, uint64_t SecAddress,
 102     uint64_t SymAddress, uint64_t SymSize, StringRef SymName,
 103     std::map<std::pair<StringRef, uint64_t>, StringRef> &Collection) {
 104   uint64_t SymOffset = SymAddress - SecAddress;
 105   uint64_t SymEnd = SymOffset + SymSize;
 106   for (const SectionRef &SR : SectionRelocMap[Sec]) {
 107     for (const object::RelocationRef &Reloc : SR.relocations()) {
 108       const object::symbol_iterator RelocSymI = Reloc.getSymbol();
 109       if (RelocSymI == Obj->symbol_end())
 110         continue;
 111       Expected<StringRef> RelocSymName = RelocSymI->getName();
 112       error(errorToErrorCode(RelocSymName.takeError()));
 113       uint64_t Offset = Reloc.getOffset();
 114       if (Offset >= SymOffset && Offset < SymEnd)
 115         Collection[std::make_pair(SymName, Offset - SymOffset)] = *RelocSymName;
 116     }
 117   }
 118 }
 119
 120 static void dumpCXXData(const ObjectFile *Obj) {
 121   struct CompleteObjectLocator {
 122     StringRef Symbols[2];
 123     ArrayRef<little32_t> Data;
 124   };
 125   struct ClassHierarchyDescriptor {
 126     StringRef Symbols[1];
 127     ArrayRef<little32_t> Data;
 128   };
 129   struct BaseClassDescriptor {
 130     StringRef Symbols[2];
 131     ArrayRef<little32_t> Data;
 132   };
 133   struct TypeDescriptor {
 134     StringRef Symbols[1];
 135     uint64_t AlwaysZero;
 136     StringRef MangledName;
 137   };
 138   struct ThrowInfo {
 139     uint32_t Flags;
 140   };
 141   struct CatchableTypeArray {
 142     uint32_t NumEntries;
 143   };
 144   struct CatchableType {
 145     uint32_t Flags;
 146     uint32_t NonVirtualBaseAdjustmentOffset;
 147     int32_t VirtualBasePointerOffset;
 148     uint32_t VirtualBaseAdjustmentOffset;
 149     uint32_t Size;
 150     StringRef Symbols[2];
 151   };
 152   std::map<std::pair<StringRef, uint64_t>, StringRef> VFTableEntries;
 153   std::map<std::pair<StringRef, uint64_t>, StringRef> TIEntries;
 154   std::map<std::pair<StringRef, uint64_t>, StringRef> CTAEntries;
 155   std::map<StringRef, ArrayRef<little32_t>> VBTables;
 156   std::map<StringRef, CompleteObjectLocator> COLs;
 157   std::map<StringRef, ClassHierarchyDescriptor> CHDs;
 158   std::map<std::pair<StringRef, uint64_t>, StringRef> BCAEntries;
 159   std::map<StringRef, BaseClassDescriptor> BCDs;
 160   std::map<StringRef, TypeDescriptor> TDs;
 161   std::map<StringRef, ThrowInfo> TIs;
 162   std::map<StringRef, CatchableTypeArray> CTAs;
 163   std::map<StringRef, CatchableType> CTs;
 164
 165   std::map<std::pair<StringRef, uint64_t>, StringRef> VTableSymEntries;
 166   std::map<std::pair<StringRef, uint64_t>, int64_t> VTableDataEntries;
 167   std::map<std::pair<StringRef, uint64_t>, StringRef> VTTEntries;
 168   std::map<StringRef, StringRef> TINames;
 169
 170   SectionRelocMap.clear();
 171   for (const SectionRef &Section : Obj->sections()) {
 172     section_iterator Sec2 = Section.getRelocatedSection();
 173     if (Sec2 != Obj->section_end())
 174       SectionRelocMap[*Sec2].push_back(Section);
 175   }
 176
 177   uint8_t BytesInAddress = Obj->getBytesInAddress();
 178
 179   std::vector<std::pair<SymbolRef, uint64_t>> SymAddr =
 180       object::computeSymbolSizes(*Obj);
 181
 182   for (auto &P : SymAddr) {
 183     object::SymbolRef Sym = P.first;
 184     uint64_t SymSize = P.second;
 185     Expected<StringRef> SymNameOrErr = Sym.getName();
 186     error(errorToErrorCode(SymNameOrErr.takeError()));
 187     StringRef SymName = *SymNameOrErr;
 188     Expected<object::section_iterator> SecIOrErr = Sym.getSection();
 189     error(errorToErrorCode(SecIOrErr.takeError()));
 190     object::section_iterator SecI = *SecIOrErr;
 191     // Skip external symbols.
 192     if (SecI == Obj->section_end())
 193       continue;
 194     const SectionRef &Sec = *SecI;
 195     // Skip virtual or BSS sections.
 196     if (Sec.isBSS() || Sec.isVirtual())
 197       continue;
 198     StringRef SecContents;
 199     error(Sec.getContents(SecContents));
 200     Expected<uint64_t> SymAddressOrErr = Sym.getAddress();
 201     error(errorToErrorCode(SymAddressOrErr.takeError()));
 202     uint64_t SymAddress = *SymAddressOrErr;
 203     uint64_t SecAddress = Sec.getAddress();
 204     uint64_t SecSize = Sec.getSize();
 205     uint64_t SymOffset = SymAddress - SecAddress;
 206     StringRef SymContents = SecContents.substr(SymOffset, SymSize);
 207
 208     // VFTables in the MS-ABI start with '??_7' and are contained within their
 209     // own COMDAT section.  We then determine the contents of the VFTable by
 210     // looking at each relocation in the section.
 211     if (SymName.startswith("??_7")) {
 212       // Each relocation either names a virtual method or a thunk.  We note the
 213       // offset into the section and the symbol used for the relocation.
 214       collectRelocationOffsets(Obj, Sec, SecAddress, SecAddress, SecSize,
 215                                SymName, VFTableEntries);
 216     }
 217     // VBTables in the MS-ABI start with '??_8' and are filled with 32-bit
 218     // offsets of virtual bases.
 219     else if (SymName.startswith("??_8")) {
 220       ArrayRef<little32_t> VBTableData(
 221           reinterpret_cast<const little32_t *>(SymContents.data()),
 222           SymContents.size() / sizeof(little32_t));
 223       VBTables[SymName] = VBTableData;
 224     }
 225     // Complete object locators in the MS-ABI start with '??_R4'
 226     else if (SymName.startswith("??_R4")) {
 227       CompleteObjectLocator COL;
 228       COL.Data = makeArrayRef(
 229           reinterpret_cast<const little32_t *>(SymContents.data()), 3);
 230       StringRef *I = std::begin(COL.Symbols), *E = std::end(COL.Symbols);
 231       collectRelocatedSymbols(Obj, Sec, SecAddress, SymAddress, SymSize, I, E);
 232       COLs[SymName] = COL;
 233     }
 234     // Class hierarchy descriptors in the MS-ABI start with '??_R3'
 235     else if (SymName.startswith("??_R3")) {
 236       ClassHierarchyDescriptor CHD;
 237       CHD.Data = makeArrayRef(
 238           reinterpret_cast<const little32_t *>(SymContents.data()), 3);
 239       StringRef *I = std::begin(CHD.Symbols), *E = std::end(CHD.Symbols);
 240       collectRelocatedSymbols(Obj, Sec, SecAddress, SymAddress, SymSize, I, E);
 241       CHDs[SymName] = CHD;
 242     }
 243     // Class hierarchy descriptors in the MS-ABI start with '??_R2'
 244     else if (SymName.startswith("??_R2")) {
 245       // Each relocation names a base class descriptor.  We note the offset into
 246       // the section and the symbol used for the relocation.
 247       collectRelocationOffsets(Obj, Sec, SecAddress, SymAddress, SymSize,
 248                                SymName, BCAEntries);
 249     }
 250     // Base class descriptors in the MS-ABI start with '??_R1'
 251     else if (SymName.startswith("??_R1")) {
 252       BaseClassDescriptor BCD;
 253       BCD.Data = makeArrayRef(
 254           reinterpret_cast<const little32_t *>(SymContents.data()) + 1, 5);
 255       StringRef *I = std::begin(BCD.Symbols), *E = std::end(BCD.Symbols);
 256       collectRelocatedSymbols(Obj, Sec, SecAddress, SymAddress, SymSize, I, E);
 257       BCDs[SymName] = BCD;
 258     }
 259     // Type descriptors in the MS-ABI start with '??_R0'
 260     else if (SymName.startswith("??_R0")) {
 261       const char *DataPtr = SymContents.drop_front(BytesInAddress).data();
 262       TypeDescriptor TD;
 263       if (BytesInAddress == 8)
 264         TD.AlwaysZero = *reinterpret_cast<const little64_t *>(DataPtr);
 265       else
 266         TD.AlwaysZero = *reinterpret_cast<const little32_t *>(DataPtr);
 267       TD.MangledName = SymContents.drop_front(BytesInAddress * 2);
 268       StringRef *I = std::begin(TD.Symbols), *E = std::end(TD.Symbols);
 269       collectRelocatedSymbols(Obj, Sec, SecAddress, SymAddress, SymSize, I, E);
 270       TDs[SymName] = TD;
 271     }
 272     // Throw descriptors in the MS-ABI start with '_TI'
 273     else if (SymName.startswith("_TI") || SymName.startswith("__TI")) {
 274       ThrowInfo TI;
 275       TI.Flags = *reinterpret_cast<const little32_t *>(SymContents.data());
 276       collectRelocationOffsets(Obj, Sec, SecAddress, SymAddress, SymSize,
 277                                SymName, TIEntries);
 278       TIs[SymName] = TI;
 279     }
 280     // Catchable type arrays in the MS-ABI start with _CTA or __CTA.
 281     else if (SymName.startswith("_CTA") || SymName.startswith("__CTA")) {
 282       CatchableTypeArray CTA;
 283       CTA.NumEntries =
 284           *reinterpret_cast<const little32_t *>(SymContents.data());
 285       collectRelocationOffsets(Obj, Sec, SecAddress, SymAddress, SymSize,
 286                                SymName, CTAEntries);
 287       CTAs[SymName] = CTA;
 288     }
 289     // Catchable types in the MS-ABI start with _CT or __CT.
 290     else if (SymName.startswith("_CT") || SymName.startswith("__CT")) {
 291       const little32_t *DataPtr =
 292           reinterpret_cast<const little32_t *>(SymContents.data());
 293       CatchableType CT;
 294       CT.Flags = DataPtr[0];
 295       CT.NonVirtualBaseAdjustmentOffset = DataPtr[2];
 296       CT.VirtualBasePointerOffset = DataPtr[3];
 297       CT.VirtualBaseAdjustmentOffset = DataPtr[4];
 298       CT.Size = DataPtr[5];
 299       StringRef *I = std::begin(CT.Symbols), *E = std::end(CT.Symbols);
 300       collectRelocatedSymbols(Obj, Sec, SecAddress, SymAddress, SymSize, I, E);
 301       CTs[SymName] = CT;
 302     }
 303     // Construction vtables in the Itanium ABI start with '_ZTT' or '__ZTT'.
 304     else if (SymName.startswith("_ZTT") || SymName.startswith("__ZTT")) {
 305       collectRelocationOffsets(Obj, Sec, SecAddress, SymAddress, SymSize,
 306                                SymName, VTTEntries);
 307     }
 308     // Typeinfo names in the Itanium ABI start with '_ZTS' or '__ZTS'.
 309     else if (SymName.startswith("_ZTS") || SymName.startswith("__ZTS")) {
 310       TINames[SymName] = SymContents.slice(0, SymContents.find('\0'));
 311     }
 312     // Vtables in the Itanium ABI start with '_ZTV' or '__ZTV'.
 313     else if (SymName.startswith("_ZTV") || SymName.startswith("__ZTV")) {
 314       collectRelocationOffsets(Obj, Sec, SecAddress, SymAddress, SymSize,
 315                                SymName, VTableSymEntries);
 316       for (uint64_t SymOffI = 0; SymOffI < SymSize; SymOffI += BytesInAddress) {
 317         auto Key = std::make_pair(SymName, SymOffI);
 318         if (VTableSymEntries.count(Key))
 319           continue;
 320         const char *DataPtr =
 321             SymContents.substr(SymOffI, BytesInAddress).data();
 322         int64_t VData;
 323         if (BytesInAddress == 8)
 324           VData = *reinterpret_cast<const little64_t *>(DataPtr);
 325         else
 326           VData = *reinterpret_cast<const little32_t *>(DataPtr);
 327         VTableDataEntries[Key] = VData;
 328       }
 329     }
 330     // Typeinfo structures in the Itanium ABI start with '_ZTI' or '__ZTI'.
 331     else if (SymName.startswith("_ZTI") || SymName.startswith("__ZTI")) {
 332       // FIXME: Do something with these!
 333     }
 334   }
 335   for (const auto &VFTableEntry : VFTableEntries) {
 336     StringRef VFTableName = VFTableEntry.first.first;
 337     uint64_t Offset = VFTableEntry.first.second;
 338     StringRef SymName = VFTableEntry.second;
 339     outs() << VFTableName << '[' << Offset << "]: " << SymName << '\n';
 340   }
 341   for (const auto &VBTable : VBTables) {
 342     StringRef VBTableName = VBTable.first;
 343     uint32_t Idx = 0;
 344     for (little32_t Offset : VBTable.second) {
 345       outs() << VBTableName << '[' << Idx << "]: " << Offset << '\n';
 346       Idx += sizeof(Offset);
 347     }
 348   }
 349   for (const auto &COLPair : COLs) {
 350     StringRef COLName = COLPair.first;
 351     const CompleteObjectLocator &COL = COLPair.second;
 352     outs() << COLName << "[IsImageRelative]: " << COL.Data[0] << '\n';
 353     outs() << COLName << "[OffsetToTop]: " << COL.Data[1] << '\n';
 354     outs() << COLName << "[VFPtrOffset]: " << COL.Data[2] << '\n';
 355     outs() << COLName << "[TypeDescriptor]: " << COL.Symbols[0] << '\n';
 356     outs() << COLName << "[ClassHierarchyDescriptor]: " << COL.Symbols[1]
 357            << '\n';
 358   }
 359   for (const auto &CHDPair : CHDs) {
 360     StringRef CHDName = CHDPair.first;
 361     const ClassHierarchyDescriptor &CHD = CHDPair.second;
 362     outs() << CHDName << "[AlwaysZero]: " << CHD.Data[0] << '\n';
 363     outs() << CHDName << "[Flags]: " << CHD.Data[1] << '\n';
 364     outs() << CHDName << "[NumClasses]: " << CHD.Data[2] << '\n';
 365     outs() << CHDName << "[BaseClassArray]: " << CHD.Symbols[0] << '\n';
 366   }
 367   for (const auto &BCAEntry : BCAEntries) {
 368     StringRef BCAName = BCAEntry.first.first;
 369     uint64_t Offset = BCAEntry.first.second;
 370     StringRef SymName = BCAEntry.second;
 371     outs() << BCAName << '[' << Offset << "]: " << SymName << '\n';
 372   }
 373   for (const auto &BCDPair : BCDs) {
 374     StringRef BCDName = BCDPair.first;
 375     const BaseClassDescriptor &BCD = BCDPair.second;
 376     outs() << BCDName << "[TypeDescriptor]: " << BCD.Symbols[0] << '\n';
 377     outs() << BCDName << "[NumBases]: " << BCD.Data[0] << '\n';
 378     outs() << BCDName << "[OffsetInVBase]: " << BCD.Data[1] << '\n';
 379     outs() << BCDName << "[VBPtrOffset]: " << BCD.Data[2] << '\n';
 380     outs() << BCDName << "[OffsetInVBTable]: " << BCD.Data[3] << '\n';
 381     outs() << BCDName << "[Flags]: " << BCD.Data[4] << '\n';
 382     outs() << BCDName << "[ClassHierarchyDescriptor]: " << BCD.Symbols[1]
 383            << '\n';
 384   }
 385   for (const auto &TDPair : TDs) {
 386     StringRef TDName = TDPair.first;
 387     const TypeDescriptor &TD = TDPair.second;
 388     outs() << TDName << "[VFPtr]: " << TD.Symbols[0] << '\n';
 389     outs() << TDName << "[AlwaysZero]: " << TD.AlwaysZero << '\n';
 390     outs() << TDName << "[MangledName]: ";
 391     outs().write_escaped(TD.MangledName.rtrim(StringRef("\0", 1)),
 392                          /*UseHexEscapes=*/true)
 393         << '\n';
 394   }
 395   for (const auto &TIPair : TIs) {
 396     StringRef TIName = TIPair.first;
 397     const ThrowInfo &TI = TIPair.second;
 398     auto dumpThrowInfoFlag = [&](const char *Name, uint32_t Flag) {
 399       outs() << TIName << "[Flags." << Name
 400              << "]: " << (TI.Flags & Flag ? "true" : "false") << '\n';
 401     };
 402     auto dumpThrowInfoSymbol = [&](const char *Name, int Offset) {
 403       outs() << TIName << '[' << Name << "]: ";
 404       auto Entry = TIEntries.find(std::make_pair(TIName, Offset));
 405       outs() << (Entry == TIEntries.end() ? "null" : Entry->second) << '\n';
 406     };
 407     outs() << TIName << "[Flags]: " << TI.Flags << '\n';
 408     dumpThrowInfoFlag("Const", 1);
 409     dumpThrowInfoFlag("Volatile", 2);
 410     dumpThrowInfoSymbol("CleanupFn", 4);
 411     dumpThrowInfoSymbol("ForwardCompat", 8);
 412     dumpThrowInfoSymbol("CatchableTypeArray", 12);
 413   }
 414   for (const auto &CTAPair : CTAs) {
 415     StringRef CTAName = CTAPair.first;
 416     const CatchableTypeArray &CTA = CTAPair.second;
 417
 418     outs() << CTAName << "[NumEntries]: " << CTA.NumEntries << '\n';
 419
 420     unsigned Idx = 0;
 421     for (auto I = CTAEntries.lower_bound(std::make_pair(CTAName, 0)),
 422               E = CTAEntries.upper_bound(std::make_pair(CTAName, UINT64_MAX));
 423          I != E; ++I)
 424       outs() << CTAName << '[' << Idx++ << "]: " << I->second << '\n';
 425   }
 426   for (const auto &CTPair : CTs) {
 427     StringRef CTName = CTPair.first;
 428     const CatchableType &CT = CTPair.second;
 429     auto dumpCatchableTypeFlag = [&](const char *Name, uint32_t Flag) {
 430       outs() << CTName << "[Flags." << Name
 431              << "]: " << (CT.Flags & Flag ? "true" : "false") << '\n';
 432     };
 433     outs() << CTName << "[Flags]: " << CT.Flags << '\n';
 434     dumpCatchableTypeFlag("ScalarType", 1);
 435     dumpCatchableTypeFlag("VirtualInheritance", 4);
 436     outs() << CTName << "[TypeDescriptor]: " << CT.Symbols[0] << '\n';
 437     outs() << CTName << "[NonVirtualBaseAdjustmentOffset]: "
 438            << CT.NonVirtualBaseAdjustmentOffset << '\n';
 439     outs() << CTName
 440            << "[VirtualBasePointerOffset]: " << CT.VirtualBasePointerOffset
 441            << '\n';
 442     outs() << CTName << "[VirtualBaseAdjustmentOffset]: "
 443            << CT.VirtualBaseAdjustmentOffset << '\n';
 444     outs() << CTName << "[Size]: " << CT.Size << '\n';
 445     outs() << CTName
 446            << "[CopyCtor]: " << (CT.Symbols[1].empty() ? "null" : CT.Symbols[1])
 447            << '\n';
 448   }
 449   for (const auto &VTTPair : VTTEntries) {
 450     StringRef VTTName = VTTPair.first.first;
 451     uint64_t VTTOffset = VTTPair.first.second;
 452     StringRef VTTEntry = VTTPair.second;
 453     outs() << VTTName << '[' << VTTOffset << "]: " << VTTEntry << '\n';
 454   }
 455   for (const auto &TIPair : TINames) {
 456     StringRef TIName = TIPair.first;
 457     outs() << TIName << ": " << TIPair.second << '\n';
 458   }
 459   auto VTableSymI = VTableSymEntries.begin();
 460   auto VTableSymE = VTableSymEntries.end();
 461   auto VTableDataI = VTableDataEntries.begin();
 462   auto VTableDataE = VTableDataEntries.end();
 463   for (;;) {
 464     bool SymDone = VTableSymI == VTableSymE;
 465     bool DataDone = VTableDataI == VTableDataE;
 466     if (SymDone && DataDone)
 467       break;
 468     if (!SymDone && (DataDone || VTableSymI->first < VTableDataI->first)) {
 469       StringRef VTableName = VTableSymI->first.first;
 470       uint64_t Offset = VTableSymI->first.second;
 471       StringRef VTableEntry = VTableSymI->second;
 472       outs() << VTableName << '[' << Offset << "]: ";
 473       outs() << VTableEntry;
 474       outs() << '\n';
 475       ++VTableSymI;
 476       continue;
 477     }
 478     if (!DataDone && (SymDone || VTableDataI->first < VTableSymI->first)) {
 479       StringRef VTableName = VTableDataI->first.first;
 480       uint64_t Offset = VTableDataI->first.second;
 481       int64_t VTableEntry = VTableDataI->second;
 482       outs() << VTableName << '[' << Offset << "]: ";
 483       outs() << VTableEntry;
 484       outs() << '\n';
 485       ++VTableDataI;
 486       continue;
 487     }
 488   }
 489 }
 490
 491 static void dumpArchive(const Archive *Arc) {
 492   Error Err = Error::success();
 493   for (auto &ArcC : Arc->children(Err)) {
 494     Expected<std::unique_ptr<Binary>> ChildOrErr = ArcC.getAsBinary();
 495     if (!ChildOrErr) {
 496       // Ignore non-object files.
 497       if (auto E = isNotObjectErrorInvalidFileType(ChildOrErr.takeError())) {
 498         std::string Buf;
 499         raw_string_ostream OS(Buf);
 500         logAllUnhandledErrors(std::move(E), OS);
 501         OS.flush();
 502         reportError(Arc->getFileName(), Buf);
 503       }
 504       consumeError(ChildOrErr.takeError());
 505       continue;
 506     }
 507
 508     if (ObjectFile *Obj = dyn_cast<ObjectFile>(&*ChildOrErr.get()))
 509       dumpCXXData(Obj);
 510     else
 511       reportError(Arc->getFileName(), cxxdump_error::unrecognized_file_format);
 512   }
 513   error(std::move(Err));
 514 }
 515
 516 static void dumpInput(StringRef File) {
 517   // Attempt to open the binary.
 518   Expected<OwningBinary<Binary>> BinaryOrErr = createBinary(File);
 519   if (!BinaryOrErr) {
 520     auto EC = errorToErrorCode(BinaryOrErr.takeError());
 521     reportError(File, EC);
 522     return;
 523   }
 524   Binary &Binary = *BinaryOrErr.get().getBinary();
 525
 526   if (Archive *Arc = dyn_cast<Archive>(&Binary))
 527     dumpArchive(Arc);
 528   else if (ObjectFile *Obj = dyn_cast<ObjectFile>(&Binary))
 529     dumpCXXData(Obj);
 530   else
 531     reportError(File, cxxdump_error::unrecognized_file_format);
 532 }
 533
 534 int main(int argc, const char *argv[]) {
 535   InitLLVM X(argc, argv);
 536
 537   // Initialize targets.
 538   llvm::InitializeAllTargetInfos();
 539
 540   // Register the target printer for --version.
 541   cl::AddExtraVersionPrinter(TargetRegistry::printRegisteredTargetsForVersion);
 542
 543   cl::ParseCommandLineOptions(argc, argv, "LLVM C++ ABI Data Dumper\n");
 544
 545   // Default to stdin if no filename is specified.
 546   if (opts::InputFilenames.size() == 0)
 547     opts::InputFilenames.push_back("-");
 548
 549   llvm::for_each(opts::InputFilenames, dumpInput);
 550
 551   return EXIT_SUCCESS;
 552 }