llvm/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/MC/TargetRegistry.h"
  17 #include "llvm/Object/Archive.h"
  18 #include "llvm/Object/ObjectFile.h"
  19 #include "llvm/Object/SymbolSize.h"
  20 #include "llvm/Support/Debug.h"
  21 #include "llvm/Support/Endian.h"
  22 #include "llvm/Support/FileSystem.h"
  23 #include "llvm/Support/InitLLVM.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::OptionCategory CXXDumpCategory("CXX Dump Options");
  37 cl::list<std::string> InputFilenames(cl::Positional,
  38                                      cl::desc("<input object files>"),
  39                                      cl::cat(CXXDumpCategory));
  40 } // namespace opts
  41
  42 namespace llvm {
  43
  44 static void error(std::error_code EC) {
  45   if (!EC)
  46     return;
  47   WithColor::error(outs(), "") << "reading file: " << EC.message() << ".\n";
  48   outs().flush();
  49   exit(1);
  50 }
  51
  52 [[noreturn]] static void error(Error Err) {
  53   logAllUnhandledErrors(std::move(Err), WithColor::error(outs()),
  54                         "reading file: ");
  55   outs().flush();
  56   exit(1);
  57 }
  58
  59 template <typename T>
  60 T unwrapOrError(Expected<T> EO) {
  61   if (!EO)
  62     error(EO.takeError());
  63   return std::move(*EO);
  64 }
  65
  66 } // namespace llvm
  67
  68 static void reportError(StringRef Input, StringRef Message) {
  69   if (Input == "-")
  70     Input = "<stdin>";
  71   WithColor::error(errs(), Input) << Message << "\n";
  72   errs().flush();
  73   exit(1);
  74 }
  75
  76 static void reportError(StringRef Input, std::error_code EC) {
  77   reportError(Input, EC.message());
  78 }
  79
  80 static std::map<SectionRef, SmallVector<SectionRef, 1>> SectionRelocMap;
  81
  82 static void collectRelocatedSymbols(const ObjectFile *Obj,
  83                                     const SectionRef &Sec, uint64_t SecAddress,
  84                                     uint64_t SymAddress, uint64_t SymSize,
  85                                     StringRef *I, StringRef *E) {
  86   uint64_t SymOffset = SymAddress - SecAddress;
  87   uint64_t SymEnd = SymOffset + SymSize;
  88   for (const SectionRef &SR : SectionRelocMap[Sec]) {
  89     for (const object::RelocationRef &Reloc : SR.relocations()) {
  90       if (I == E)
  91         break;
  92       const object::symbol_iterator RelocSymI = Reloc.getSymbol();
  93       if (RelocSymI == Obj->symbol_end())
  94         continue;
  95       Expected<StringRef> RelocSymName = RelocSymI->getName();
  96       error(errorToErrorCode(RelocSymName.takeError()));
  97       uint64_t Offset = Reloc.getOffset();
  98       if (Offset >= SymOffset && Offset < SymEnd) {
  99         *I = *RelocSymName;
 100         ++I;
 101       }
 102     }
 103   }
 104 }
 105
 106 static void collectRelocationOffsets(
 107     const ObjectFile *Obj, const SectionRef &Sec, uint64_t SecAddress,
 108     uint64_t SymAddress, uint64_t SymSize, StringRef SymName,
 109     std::map<std::pair<StringRef, uint64_t>, StringRef> &Collection) {
 110   uint64_t SymOffset = SymAddress - SecAddress;
 111   uint64_t SymEnd = SymOffset + SymSize;
 112   for (const SectionRef &SR : SectionRelocMap[Sec]) {
 113     for (const object::RelocationRef &Reloc : SR.relocations()) {
 114       const object::symbol_iterator RelocSymI = Reloc.getSymbol();
 115       if (RelocSymI == Obj->symbol_end())
 116         continue;
 117       Expected<StringRef> RelocSymName = RelocSymI->getName();
 118       error(errorToErrorCode(RelocSymName.takeError()));
 119       uint64_t Offset = Reloc.getOffset();
 120       if (Offset >= SymOffset && Offset < SymEnd)
 121         Collection[std::make_pair(SymName, Offset - SymOffset)] = *RelocSymName;
 122     }
 123   }
 124 }
 125
 126 static void dumpCXXData(const ObjectFile *Obj) {
 127   struct CompleteObjectLocator {
 128     StringRef Symbols[2];
 129     ArrayRef<little32_t> Data;
 130   };
 131   struct ClassHierarchyDescriptor {
 132     StringRef Symbols[1];
 133     ArrayRef<little32_t> Data;
 134   };
 135   struct BaseClassDescriptor {
 136     StringRef Symbols[2];
 137     ArrayRef<little32_t> Data;
 138   };
 139   struct TypeDescriptor {
 140     StringRef Symbols[1];
 141     uint64_t AlwaysZero;
 142     StringRef MangledName;
 143   };
 144   struct ThrowInfo {
 145     uint32_t Flags;
 146   };
 147   struct CatchableTypeArray {
 148     uint32_t NumEntries;
 149   };
 150   struct CatchableType {
 151     uint32_t Flags;
 152     uint32_t NonVirtualBaseAdjustmentOffset;
 153     int32_t VirtualBasePointerOffset;
 154     uint32_t VirtualBaseAdjustmentOffset;
 155     uint32_t Size;
 156     StringRef Symbols[2];
 157   };
 158   std::map<std::pair<StringRef, uint64_t>, StringRef> VFTableEntries;
 159   std::map<std::pair<StringRef, uint64_t>, StringRef> TIEntries;
 160   std::map<std::pair<StringRef, uint64_t>, StringRef> CTAEntries;
 161   std::map<StringRef, ArrayRef<little32_t>> VBTables;
 162   std::map<StringRef, CompleteObjectLocator> COLs;
 163   std::map<StringRef, ClassHierarchyDescriptor> CHDs;
 164   std::map<std::pair<StringRef, uint64_t>, StringRef> BCAEntries;
 165   std::map<StringRef, BaseClassDescriptor> BCDs;
 166   std::map<StringRef, TypeDescriptor> TDs;
 167   std::map<StringRef, ThrowInfo> TIs;
 168   std::map<StringRef, CatchableTypeArray> CTAs;
 169   std::map<StringRef, CatchableType> CTs;
 170
 171   std::map<std::pair<StringRef, uint64_t>, StringRef> VTableSymEntries;
 172   std::map<std::pair<StringRef, uint64_t>, int64_t> VTableDataEntries;
 173   std::map<std::pair<StringRef, uint64_t>, StringRef> VTTEntries;
 174   std::map<StringRef, StringRef> TINames;
 175
 176   SectionRelocMap.clear();
 177   for (const SectionRef &Section : Obj->sections()) {
 178     Expected<section_iterator> ErrOrSec = Section.getRelocatedSection();
 179     if (!ErrOrSec)
 180       error(ErrOrSec.takeError());
 181
 182     section_iterator Sec2 = *ErrOrSec;
 183     if (Sec2 != Obj->section_end())
 184       SectionRelocMap[*Sec2].push_back(Section);
 185   }
 186
 187   uint8_t BytesInAddress = Obj->getBytesInAddress();
 188
 189   std::vector<std::pair<SymbolRef, uint64_t>> SymAddr =
 190       object::computeSymbolSizes(*Obj);
 191
 192   for (auto &P : SymAddr) {
 193     object::SymbolRef Sym = P.first;
 194     uint64_t SymSize = P.second;
 195     Expected<StringRef> SymNameOrErr = Sym.getName();
 196     error(errorToErrorCode(SymNameOrErr.takeError()));
 197     StringRef SymName = *SymNameOrErr;
 198     Expected<object::section_iterator> SecIOrErr = Sym.getSection();
 199     error(errorToErrorCode(SecIOrErr.takeError()));
 200     object::section_iterator SecI = *SecIOrErr;
 201     // Skip external symbols.
 202     if (SecI == Obj->section_end())
 203       continue;
 204     const SectionRef &Sec = *SecI;
 205     // Skip virtual or BSS sections.
 206     if (Sec.isBSS() || Sec.isVirtual())
 207       continue;
 208     StringRef SecContents = unwrapOrError(Sec.getContents());
 209     Expected<uint64_t> SymAddressOrErr = Sym.getAddress();
 210     error(errorToErrorCode(SymAddressOrErr.takeError()));
 211     uint64_t SymAddress = *SymAddressOrErr;
 212     uint64_t SecAddress = Sec.getAddress();
 213     uint64_t SecSize = Sec.getSize();
 214     uint64_t SymOffset = SymAddress - SecAddress;
 215     StringRef SymContents = SecContents.substr(SymOffset, SymSize);
 216
 217     // VFTables in the MS-ABI start with '??_7' and are contained within their
 218     // own COMDAT section.  We then determine the contents of the VFTable by
 219     // looking at each relocation in the section.
 220     if (SymName.starts_with("??_7")) {
 221       // Each relocation either names a virtual method or a thunk.  We note the
 222       // offset into the section and the symbol used for the relocation.
 223       collectRelocationOffsets(Obj, Sec, SecAddress, SecAddress, SecSize,
 224                                SymName, VFTableEntries);
 225     }
 226     // VBTables in the MS-ABI start with '??_8' and are filled with 32-bit
 227     // offsets of virtual bases.
 228     else if (SymName.starts_with("??_8")) {
 229       ArrayRef<little32_t> VBTableData(
 230           reinterpret_cast<const little32_t *>(SymContents.data()),
 231           SymContents.size() / sizeof(little32_t));
 232       VBTables[SymName] = VBTableData;
 233     }
 234     // Complete object locators in the MS-ABI start with '??_R4'
 235     else if (SymName.starts_with("??_R4")) {
 236       CompleteObjectLocator COL;
 237       COL.Data =
 238           ArrayRef(reinterpret_cast<const little32_t *>(SymContents.data()), 3);
 239       StringRef *I = std::begin(COL.Symbols), *E = std::end(COL.Symbols);
 240       collectRelocatedSymbols(Obj, Sec, SecAddress, SymAddress, SymSize, I, E);
 241       COLs[SymName] = COL;
 242     }
 243     // Class hierarchy descriptors in the MS-ABI start with '??_R3'
 244     else if (SymName.starts_with("??_R3")) {
 245       ClassHierarchyDescriptor CHD;
 246       CHD.Data =
 247           ArrayRef(reinterpret_cast<const little32_t *>(SymContents.data()), 3);
 248       StringRef *I = std::begin(CHD.Symbols), *E = std::end(CHD.Symbols);
 249       collectRelocatedSymbols(Obj, Sec, SecAddress, SymAddress, SymSize, I, E);
 250       CHDs[SymName] = CHD;
 251     }
 252     // Class hierarchy descriptors in the MS-ABI start with '??_R2'
 253     else if (SymName.starts_with("??_R2")) {
 254       // Each relocation names a base class descriptor.  We note the offset into
 255       // the section and the symbol used for the relocation.
 256       collectRelocationOffsets(Obj, Sec, SecAddress, SymAddress, SymSize,
 257                                SymName, BCAEntries);
 258     }
 259     // Base class descriptors in the MS-ABI start with '??_R1'
 260     else if (SymName.starts_with("??_R1")) {
 261       BaseClassDescriptor BCD;
 262       BCD.Data = ArrayRef(
 263           reinterpret_cast<const little32_t *>(SymContents.data()) + 1, 5);
 264       StringRef *I = std::begin(BCD.Symbols), *E = std::end(BCD.Symbols);
 265       collectRelocatedSymbols(Obj, Sec, SecAddress, SymAddress, SymSize, I, E);
 266       BCDs[SymName] = BCD;
 267     }
 268     // Type descriptors in the MS-ABI start with '??_R0'
 269     else if (SymName.starts_with("??_R0")) {
 270       const char *DataPtr = SymContents.drop_front(BytesInAddress).data();
 271       TypeDescriptor TD;
 272       if (BytesInAddress == 8)
 273         TD.AlwaysZero = *reinterpret_cast<const little64_t *>(DataPtr);
 274       else
 275         TD.AlwaysZero = *reinterpret_cast<const little32_t *>(DataPtr);
 276       TD.MangledName = SymContents.drop_front(BytesInAddress * 2);
 277       StringRef *I = std::begin(TD.Symbols), *E = std::end(TD.Symbols);
 278       collectRelocatedSymbols(Obj, Sec, SecAddress, SymAddress, SymSize, I, E);
 279       TDs[SymName] = TD;
 280     }
 281     // Throw descriptors in the MS-ABI start with '_TI'
 282     else if (SymName.starts_with("_TI") || SymName.starts_with("__TI")) {
 283       ThrowInfo TI;
 284       TI.Flags = *reinterpret_cast<const little32_t *>(SymContents.data());
 285       collectRelocationOffsets(Obj, Sec, SecAddress, SymAddress, SymSize,
 286                                SymName, TIEntries);
 287       TIs[SymName] = TI;
 288     }
 289     // Catchable type arrays in the MS-ABI start with _CTA or __CTA.
 290     else if (SymName.starts_with("_CTA") || SymName.starts_with("__CTA")) {
 291       CatchableTypeArray CTA;
 292       CTA.NumEntries =
 293           *reinterpret_cast<const little32_t *>(SymContents.data());
 294       collectRelocationOffsets(Obj, Sec, SecAddress, SymAddress, SymSize,
 295                                SymName, CTAEntries);
 296       CTAs[SymName] = CTA;
 297     }
 298     // Catchable types in the MS-ABI start with _CT or __CT.
 299     else if (SymName.starts_with("_CT") || SymName.starts_with("__CT")) {
 300       const little32_t *DataPtr =
 301           reinterpret_cast<const little32_t *>(SymContents.data());
 302       CatchableType CT;
 303       CT.Flags = DataPtr[0];
 304       CT.NonVirtualBaseAdjustmentOffset = DataPtr[2];
 305       CT.VirtualBasePointerOffset = DataPtr[3];
 306       CT.VirtualBaseAdjustmentOffset = DataPtr[4];
 307       CT.Size = DataPtr[5];
 308       StringRef *I = std::begin(CT.Symbols), *E = std::end(CT.Symbols);
 309       collectRelocatedSymbols(Obj, Sec, SecAddress, SymAddress, SymSize, I, E);
 310       CTs[SymName] = CT;
 311     }
 312     // Construction vtables in the Itanium ABI start with '_ZTT' or '__ZTT'.
 313     else if (SymName.starts_with("_ZTT") || SymName.starts_with("__ZTT")) {
 314       collectRelocationOffsets(Obj, Sec, SecAddress, SymAddress, SymSize,
 315                                SymName, VTTEntries);
 316     }
 317     // Typeinfo names in the Itanium ABI start with '_ZTS' or '__ZTS'.
 318     else if (SymName.starts_with("_ZTS") || SymName.starts_with("__ZTS")) {
 319       TINames[SymName] = SymContents.slice(0, SymContents.find('\0'));
 320     }
 321     // Vtables in the Itanium ABI start with '_ZTV' or '__ZTV'.
 322     else if (SymName.starts_with("_ZTV") || SymName.starts_with("__ZTV")) {
 323       collectRelocationOffsets(Obj, Sec, SecAddress, SymAddress, SymSize,
 324                                SymName, VTableSymEntries);
 325       for (uint64_t SymOffI = 0; SymOffI < SymSize; SymOffI += BytesInAddress) {
 326         auto Key = std::make_pair(SymName, SymOffI);
 327         if (VTableSymEntries.count(Key))
 328           continue;
 329         const char *DataPtr =
 330             SymContents.substr(SymOffI, BytesInAddress).data();
 331         int64_t VData;
 332         if (BytesInAddress == 8)
 333           VData = *reinterpret_cast<const little64_t *>(DataPtr);
 334         else
 335           VData = *reinterpret_cast<const little32_t *>(DataPtr);
 336         VTableDataEntries[Key] = VData;
 337       }
 338     }
 339     // Typeinfo structures in the Itanium ABI start with '_ZTI' or '__ZTI'.
 340     else if (SymName.starts_with("_ZTI") || SymName.starts_with("__ZTI")) {
 341       // FIXME: Do something with these!
 342     }
 343   }
 344   for (const auto &VFTableEntry : VFTableEntries) {
 345     StringRef VFTableName = VFTableEntry.first.first;
 346     uint64_t Offset = VFTableEntry.first.second;
 347     StringRef SymName = VFTableEntry.second;
 348     outs() << VFTableName << '[' << Offset << "]: " << SymName << '\n';
 349   }
 350   for (const auto &VBTable : VBTables) {
 351     StringRef VBTableName = VBTable.first;
 352     uint32_t Idx = 0;
 353     for (little32_t Offset : VBTable.second) {
 354       outs() << VBTableName << '[' << Idx << "]: " << Offset << '\n';
 355       Idx += sizeof(Offset);
 356     }
 357   }
 358   for (const auto &COLPair : COLs) {
 359     StringRef COLName = COLPair.first;
 360     const CompleteObjectLocator &COL = COLPair.second;
 361     outs() << COLName << "[IsImageRelative]: " << COL.Data[0] << '\n';
 362     outs() << COLName << "[OffsetToTop]: " << COL.Data[1] << '\n';
 363     outs() << COLName << "[VFPtrOffset]: " << COL.Data[2] << '\n';
 364     outs() << COLName << "[TypeDescriptor]: " << COL.Symbols[0] << '\n';
 365     outs() << COLName << "[ClassHierarchyDescriptor]: " << COL.Symbols[1]
 366            << '\n';
 367   }
 368   for (const auto &CHDPair : CHDs) {
 369     StringRef CHDName = CHDPair.first;
 370     const ClassHierarchyDescriptor &CHD = CHDPair.second;
 371     outs() << CHDName << "[AlwaysZero]: " << CHD.Data[0] << '\n';
 372     outs() << CHDName << "[Flags]: " << CHD.Data[1] << '\n';
 373     outs() << CHDName << "[NumClasses]: " << CHD.Data[2] << '\n';
 374     outs() << CHDName << "[BaseClassArray]: " << CHD.Symbols[0] << '\n';
 375   }
 376   for (const auto &BCAEntry : BCAEntries) {
 377     StringRef BCAName = BCAEntry.first.first;
 378     uint64_t Offset = BCAEntry.first.second;
 379     StringRef SymName = BCAEntry.second;
 380     outs() << BCAName << '[' << Offset << "]: " << SymName << '\n';
 381   }
 382   for (const auto &BCDPair : BCDs) {
 383     StringRef BCDName = BCDPair.first;
 384     const BaseClassDescriptor &BCD = BCDPair.second;
 385     outs() << BCDName << "[TypeDescriptor]: " << BCD.Symbols[0] << '\n';
 386     outs() << BCDName << "[NumBases]: " << BCD.Data[0] << '\n';
 387     outs() << BCDName << "[OffsetInVBase]: " << BCD.Data[1] << '\n';
 388     outs() << BCDName << "[VBPtrOffset]: " << BCD.Data[2] << '\n';
 389     outs() << BCDName << "[OffsetInVBTable]: " << BCD.Data[3] << '\n';
 390     outs() << BCDName << "[Flags]: " << BCD.Data[4] << '\n';
 391     outs() << BCDName << "[ClassHierarchyDescriptor]: " << BCD.Symbols[1]
 392            << '\n';
 393   }
 394   for (const auto &TDPair : TDs) {
 395     StringRef TDName = TDPair.first;
 396     const TypeDescriptor &TD = TDPair.second;
 397     outs() << TDName << "[VFPtr]: " << TD.Symbols[0] << '\n';
 398     outs() << TDName << "[AlwaysZero]: " << TD.AlwaysZero << '\n';
 399     outs() << TDName << "[MangledName]: ";
 400     outs().write_escaped(TD.MangledName.rtrim(StringRef("\0", 1)),
 401                          /*UseHexEscapes=*/true)
 402         << '\n';
 403   }
 404   for (const auto &TIPair : TIs) {
 405     StringRef TIName = TIPair.first;
 406     const ThrowInfo &TI = TIPair.second;
 407     auto dumpThrowInfoFlag = [&](const char *Name, uint32_t Flag) {
 408       outs() << TIName << "[Flags." << Name
 409              << "]: " << (TI.Flags & Flag ? "true" : "false") << '\n';
 410     };
 411     auto dumpThrowInfoSymbol = [&](const char *Name, int Offset) {
 412       outs() << TIName << '[' << Name << "]: ";
 413       auto Entry = TIEntries.find(std::make_pair(TIName, Offset));
 414       outs() << (Entry == TIEntries.end() ? "null" : Entry->second) << '\n';
 415     };
 416     outs() << TIName << "[Flags]: " << TI.Flags << '\n';
 417     dumpThrowInfoFlag("Const", 1);
 418     dumpThrowInfoFlag("Volatile", 2);
 419     dumpThrowInfoSymbol("CleanupFn", 4);
 420     dumpThrowInfoSymbol("ForwardCompat", 8);
 421     dumpThrowInfoSymbol("CatchableTypeArray", 12);
 422   }
 423   for (const auto &CTAPair : CTAs) {
 424     StringRef CTAName = CTAPair.first;
 425     const CatchableTypeArray &CTA = CTAPair.second;
 426
 427     outs() << CTAName << "[NumEntries]: " << CTA.NumEntries << '\n';
 428
 429     unsigned Idx = 0;
 430     for (auto I = CTAEntries.lower_bound(std::make_pair(CTAName, 0)),
 431               E = CTAEntries.upper_bound(std::make_pair(CTAName, UINT64_MAX));
 432          I != E; ++I)
 433       outs() << CTAName << '[' << Idx++ << "]: " << I->second << '\n';
 434   }
 435   for (const auto &CTPair : CTs) {
 436     StringRef CTName = CTPair.first;
 437     const CatchableType &CT = CTPair.second;
 438     auto dumpCatchableTypeFlag = [&](const char *Name, uint32_t Flag) {
 439       outs() << CTName << "[Flags." << Name
 440              << "]: " << (CT.Flags & Flag ? "true" : "false") << '\n';
 441     };
 442     outs() << CTName << "[Flags]: " << CT.Flags << '\n';
 443     dumpCatchableTypeFlag("ScalarType", 1);
 444     dumpCatchableTypeFlag("VirtualInheritance", 4);
 445     outs() << CTName << "[TypeDescriptor]: " << CT.Symbols[0] << '\n';
 446     outs() << CTName << "[NonVirtualBaseAdjustmentOffset]: "
 447            << CT.NonVirtualBaseAdjustmentOffset << '\n';
 448     outs() << CTName
 449            << "[VirtualBasePointerOffset]: " << CT.VirtualBasePointerOffset
 450            << '\n';
 451     outs() << CTName << "[VirtualBaseAdjustmentOffset]: "
 452            << CT.VirtualBaseAdjustmentOffset << '\n';
 453     outs() << CTName << "[Size]: " << CT.Size << '\n';
 454     outs() << CTName
 455            << "[CopyCtor]: " << (CT.Symbols[1].empty() ? "null" : CT.Symbols[1])
 456            << '\n';
 457   }
 458   for (const auto &VTTPair : VTTEntries) {
 459     StringRef VTTName = VTTPair.first.first;
 460     uint64_t VTTOffset = VTTPair.first.second;
 461     StringRef VTTEntry = VTTPair.second;
 462     outs() << VTTName << '[' << VTTOffset << "]: " << VTTEntry << '\n';
 463   }
 464   for (const auto &TIPair : TINames) {
 465     StringRef TIName = TIPair.first;
 466     outs() << TIName << ": " << TIPair.second << '\n';
 467   }
 468   auto VTableSymI = VTableSymEntries.begin();
 469   auto VTableSymE = VTableSymEntries.end();
 470   auto VTableDataI = VTableDataEntries.begin();
 471   auto VTableDataE = VTableDataEntries.end();
 472   for (;;) {
 473     bool SymDone = VTableSymI == VTableSymE;
 474     bool DataDone = VTableDataI == VTableDataE;
 475     if (SymDone && DataDone)
 476       break;
 477     if (!SymDone && (DataDone || VTableSymI->first < VTableDataI->first)) {
 478       StringRef VTableName = VTableSymI->first.first;
 479       uint64_t Offset = VTableSymI->first.second;
 480       StringRef VTableEntry = VTableSymI->second;
 481       outs() << VTableName << '[' << Offset << "]: ";
 482       outs() << VTableEntry;
 483       outs() << '\n';
 484       ++VTableSymI;
 485       continue;
 486     }
 487     if (!DataDone && (SymDone || VTableDataI->first < VTableSymI->first)) {
 488       StringRef VTableName = VTableDataI->first.first;
 489       uint64_t Offset = VTableDataI->first.second;
 490       int64_t VTableEntry = VTableDataI->second;
 491       outs() << VTableName << '[' << Offset << "]: ";
 492       outs() << VTableEntry;
 493       outs() << '\n';
 494       ++VTableDataI;
 495       continue;
 496     }
 497   }
 498 }
 499
 500 static void dumpArchive(const Archive *Arc) {
 501   Error Err = Error::success();
 502   for (const auto &ArcC : Arc->children(Err)) {
 503     Expected<std::unique_ptr<Binary>> ChildOrErr = ArcC.getAsBinary();
 504     if (!ChildOrErr) {
 505       // Ignore non-object files.
 506       if (auto E = isNotObjectErrorInvalidFileType(ChildOrErr.takeError())) {
 507         std::string Buf;
 508         raw_string_ostream OS(Buf);
 509         logAllUnhandledErrors(std::move(E), OS);
 510         OS.flush();
 511         reportError(Arc->getFileName(), Buf);
 512       }
 513       consumeError(ChildOrErr.takeError());
 514       continue;
 515     }
 516
 517     if (ObjectFile *Obj = dyn_cast<ObjectFile>(&*ChildOrErr.get()))
 518       dumpCXXData(Obj);
 519     else
 520       reportError(Arc->getFileName(), cxxdump_error::unrecognized_file_format);
 521   }
 522   if (Err)
 523     error(std::move(Err));
 524 }
 525
 526 static void dumpInput(StringRef File) {
 527   // Attempt to open the binary.
 528   Expected<OwningBinary<Binary>> BinaryOrErr = createBinary(File);
 529   if (!BinaryOrErr) {
 530     auto EC = errorToErrorCode(BinaryOrErr.takeError());
 531     reportError(File, EC);
 532     return;
 533   }
 534   Binary &Binary = *BinaryOrErr.get().getBinary();
 535
 536   if (Archive *Arc = dyn_cast<Archive>(&Binary))
 537     dumpArchive(Arc);
 538   else if (ObjectFile *Obj = dyn_cast<ObjectFile>(&Binary))
 539     dumpCXXData(Obj);
 540   else
 541     reportError(File, cxxdump_error::unrecognized_file_format);
 542 }
 543
 544 int main(int argc, const char *argv[]) {
 545   InitLLVM X(argc, argv);
 546
 547   // Initialize targets.
 548   llvm::InitializeAllTargetInfos();
 549
 550   // Register the target printer for --version.
 551   cl::AddExtraVersionPrinter(TargetRegistry::printRegisteredTargetsForVersion);
 552
 553   cl::HideUnrelatedOptions({&opts::CXXDumpCategory, &getColorCategory()});
 554   cl::ParseCommandLineOptions(argc, argv, "LLVM C++ ABI Data Dumper\n");
 555
 556   // Default to stdin if no filename is specified.
 557   if (opts::InputFilenames.size() == 0)
 558     opts::InputFilenames.push_back("-");
 559
 560   llvm::for_each(opts::InputFilenames, dumpInput);
 561
 562   return EXIT_SUCCESS;
 563 }