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