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 
33 using namespace llvm;
34 using namespace llvm::object;
35 using namespace llvm::support;
36 
37 namespace opts {
38 cl::list<std::string> InputFilenames(cl::Positional,
39                                      cl::desc("<input object files>"),
40                                      cl::ZeroOrMore);
41 } // namespace opts
42 
43 namespace llvm {
44 
error(std::error_code EC)45 static 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 
error(Error Err)53 static void error(Error Err) {
54   if (Err) {
55     logAllUnhandledErrors(std::move(Err), outs(), "Error reading file: ");
56     outs().flush();
57     exit(1);
58   }
59 }
60 
61 } // namespace llvm
62 
reportError(StringRef Input,StringRef Message)63 static void reportError(StringRef Input, StringRef Message) {
64   if (Input == "-")
65     Input = "<stdin>";
66   errs() << Input << ": " << Message << "\n";
67   errs().flush();
68   exit(1);
69 }
70 
reportError(StringRef Input,std::error_code EC)71 static void reportError(StringRef Input, std::error_code EC) {
72   reportError(Input, EC.message());
73 }
74 
75 static std::map<SectionRef, SmallVector<SectionRef, 1>> SectionRelocMap;
76 
collectRelocatedSymbols(const ObjectFile * Obj,const SectionRef & Sec,uint64_t SecAddress,uint64_t SymAddress,uint64_t SymSize,StringRef * I,StringRef * E)77 static void collectRelocatedSymbols(const ObjectFile *Obj,
78                                     const SectionRef &Sec, uint64_t SecAddress,
79                                     uint64_t SymAddress, uint64_t SymSize,
80                                     StringRef *I, StringRef *E) {
81   uint64_t SymOffset = SymAddress - SecAddress;
82   uint64_t SymEnd = SymOffset + SymSize;
83   for (const SectionRef &SR : SectionRelocMap[Sec]) {
84     for (const object::RelocationRef &Reloc : SR.relocations()) {
85       if (I == E)
86         break;
87       const object::symbol_iterator RelocSymI = Reloc.getSymbol();
88       if (RelocSymI == Obj->symbol_end())
89         continue;
90       Expected<StringRef> RelocSymName = RelocSymI->getName();
91       error(errorToErrorCode(RelocSymName.takeError()));
92       uint64_t Offset = Reloc.getOffset();
93       if (Offset >= SymOffset && Offset < SymEnd) {
94         *I = *RelocSymName;
95         ++I;
96       }
97     }
98   }
99 }
100 
collectRelocationOffsets(const ObjectFile * Obj,const SectionRef & Sec,uint64_t SecAddress,uint64_t SymAddress,uint64_t SymSize,StringRef SymName,std::map<std::pair<StringRef,uint64_t>,StringRef> & Collection)101 static void collectRelocationOffsets(
102     const ObjectFile *Obj, const SectionRef &Sec, uint64_t SecAddress,
103     uint64_t SymAddress, uint64_t SymSize, StringRef SymName,
104     std::map<std::pair<StringRef, uint64_t>, StringRef> &Collection) {
105   uint64_t SymOffset = SymAddress - SecAddress;
106   uint64_t SymEnd = SymOffset + SymSize;
107   for (const SectionRef &SR : SectionRelocMap[Sec]) {
108     for (const object::RelocationRef &Reloc : SR.relocations()) {
109       const object::symbol_iterator RelocSymI = Reloc.getSymbol();
110       if (RelocSymI == Obj->symbol_end())
111         continue;
112       Expected<StringRef> RelocSymName = RelocSymI->getName();
113       error(errorToErrorCode(RelocSymName.takeError()));
114       uint64_t Offset = Reloc.getOffset();
115       if (Offset >= SymOffset && Offset < SymEnd)
116         Collection[std::make_pair(SymName, Offset - SymOffset)] = *RelocSymName;
117     }
118   }
119 }
120 
dumpCXXData(const ObjectFile * Obj)121 static void dumpCXXData(const ObjectFile *Obj) {
122   struct CompleteObjectLocator {
123     StringRef Symbols[2];
124     ArrayRef<little32_t> Data;
125   };
126   struct ClassHierarchyDescriptor {
127     StringRef Symbols[1];
128     ArrayRef<little32_t> Data;
129   };
130   struct BaseClassDescriptor {
131     StringRef Symbols[2];
132     ArrayRef<little32_t> Data;
133   };
134   struct TypeDescriptor {
135     StringRef Symbols[1];
136     uint64_t AlwaysZero;
137     StringRef MangledName;
138   };
139   struct ThrowInfo {
140     uint32_t Flags;
141   };
142   struct CatchableTypeArray {
143     uint32_t NumEntries;
144   };
145   struct CatchableType {
146     uint32_t Flags;
147     uint32_t NonVirtualBaseAdjustmentOffset;
148     int32_t VirtualBasePointerOffset;
149     uint32_t VirtualBaseAdjustmentOffset;
150     uint32_t Size;
151     StringRef Symbols[2];
152   };
153   std::map<std::pair<StringRef, uint64_t>, StringRef> VFTableEntries;
154   std::map<std::pair<StringRef, uint64_t>, StringRef> TIEntries;
155   std::map<std::pair<StringRef, uint64_t>, StringRef> CTAEntries;
156   std::map<StringRef, ArrayRef<little32_t>> VBTables;
157   std::map<StringRef, CompleteObjectLocator> COLs;
158   std::map<StringRef, ClassHierarchyDescriptor> CHDs;
159   std::map<std::pair<StringRef, uint64_t>, StringRef> BCAEntries;
160   std::map<StringRef, BaseClassDescriptor> BCDs;
161   std::map<StringRef, TypeDescriptor> TDs;
162   std::map<StringRef, ThrowInfo> TIs;
163   std::map<StringRef, CatchableTypeArray> CTAs;
164   std::map<StringRef, CatchableType> CTs;
165 
166   std::map<std::pair<StringRef, uint64_t>, StringRef> VTableSymEntries;
167   std::map<std::pair<StringRef, uint64_t>, int64_t> VTableDataEntries;
168   std::map<std::pair<StringRef, uint64_t>, StringRef> VTTEntries;
169   std::map<StringRef, StringRef> TINames;
170 
171   SectionRelocMap.clear();
172   for (const SectionRef &Section : Obj->sections()) {
173     section_iterator Sec2 = Section.getRelocatedSection();
174     if (Sec2 != Obj->section_end())
175       SectionRelocMap[*Sec2].push_back(Section);
176   }
177 
178   uint8_t BytesInAddress = Obj->getBytesInAddress();
179 
180   std::vector<std::pair<SymbolRef, uint64_t>> SymAddr =
181       object::computeSymbolSizes(*Obj);
182 
183   for (auto &P : SymAddr) {
184     object::SymbolRef Sym = P.first;
185     uint64_t SymSize = P.second;
186     Expected<StringRef> SymNameOrErr = Sym.getName();
187     error(errorToErrorCode(SymNameOrErr.takeError()));
188     StringRef SymName = *SymNameOrErr;
189     Expected<object::section_iterator> SecIOrErr = Sym.getSection();
190     error(errorToErrorCode(SecIOrErr.takeError()));
191     object::section_iterator SecI = *SecIOrErr;
192     // Skip external symbols.
193     if (SecI == Obj->section_end())
194       continue;
195     const SectionRef &Sec = *SecI;
196     // Skip virtual or BSS sections.
197     if (Sec.isBSS() || Sec.isVirtual())
198       continue;
199     StringRef SecContents;
200     error(Sec.getContents(SecContents));
201     Expected<uint64_t> SymAddressOrErr = Sym.getAddress();
202     error(errorToErrorCode(SymAddressOrErr.takeError()));
203     uint64_t SymAddress = *SymAddressOrErr;
204     uint64_t SecAddress = Sec.getAddress();
205     uint64_t SecSize = Sec.getSize();
206     uint64_t SymOffset = SymAddress - SecAddress;
207     StringRef SymContents = SecContents.substr(SymOffset, SymSize);
208 
209     // VFTables in the MS-ABI start with '??_7' and are contained within their
210     // own COMDAT section.  We then determine the contents of the VFTable by
211     // looking at each relocation in the section.
212     if (SymName.startswith("??_7")) {
213       // Each relocation either names a virtual method or a thunk.  We note the
214       // offset into the section and the symbol used for the relocation.
215       collectRelocationOffsets(Obj, Sec, SecAddress, SecAddress, SecSize,
216                                SymName, VFTableEntries);
217     }
218     // VBTables in the MS-ABI start with '??_8' and are filled with 32-bit
219     // offsets of virtual bases.
220     else if (SymName.startswith("??_8")) {
221       ArrayRef<little32_t> VBTableData(
222           reinterpret_cast<const little32_t *>(SymContents.data()),
223           SymContents.size() / sizeof(little32_t));
224       VBTables[SymName] = VBTableData;
225     }
226     // Complete object locators in the MS-ABI start with '??_R4'
227     else if (SymName.startswith("??_R4")) {
228       CompleteObjectLocator COL;
229       COL.Data = makeArrayRef(
230           reinterpret_cast<const little32_t *>(SymContents.data()), 3);
231       StringRef *I = std::begin(COL.Symbols), *E = std::end(COL.Symbols);
232       collectRelocatedSymbols(Obj, Sec, SecAddress, SymAddress, SymSize, I, E);
233       COLs[SymName] = COL;
234     }
235     // Class hierarchy descriptors in the MS-ABI start with '??_R3'
236     else if (SymName.startswith("??_R3")) {
237       ClassHierarchyDescriptor CHD;
238       CHD.Data = makeArrayRef(
239           reinterpret_cast<const little32_t *>(SymContents.data()), 3);
240       StringRef *I = std::begin(CHD.Symbols), *E = std::end(CHD.Symbols);
241       collectRelocatedSymbols(Obj, Sec, SecAddress, SymAddress, SymSize, I, E);
242       CHDs[SymName] = CHD;
243     }
244     // Class hierarchy descriptors in the MS-ABI start with '??_R2'
245     else if (SymName.startswith("??_R2")) {
246       // Each relocation names a base class descriptor.  We note the offset into
247       // the section and the symbol used for the relocation.
248       collectRelocationOffsets(Obj, Sec, SecAddress, SymAddress, SymSize,
249                                SymName, BCAEntries);
250     }
251     // Base class descriptors in the MS-ABI start with '??_R1'
252     else if (SymName.startswith("??_R1")) {
253       BaseClassDescriptor BCD;
254       BCD.Data = makeArrayRef(
255           reinterpret_cast<const little32_t *>(SymContents.data()) + 1, 5);
256       StringRef *I = std::begin(BCD.Symbols), *E = std::end(BCD.Symbols);
257       collectRelocatedSymbols(Obj, Sec, SecAddress, SymAddress, SymSize, I, E);
258       BCDs[SymName] = BCD;
259     }
260     // Type descriptors in the MS-ABI start with '??_R0'
261     else if (SymName.startswith("??_R0")) {
262       const char *DataPtr = SymContents.drop_front(BytesInAddress).data();
263       TypeDescriptor TD;
264       if (BytesInAddress == 8)
265         TD.AlwaysZero = *reinterpret_cast<const little64_t *>(DataPtr);
266       else
267         TD.AlwaysZero = *reinterpret_cast<const little32_t *>(DataPtr);
268       TD.MangledName = SymContents.drop_front(BytesInAddress * 2);
269       StringRef *I = std::begin(TD.Symbols), *E = std::end(TD.Symbols);
270       collectRelocatedSymbols(Obj, Sec, SecAddress, SymAddress, SymSize, I, E);
271       TDs[SymName] = TD;
272     }
273     // Throw descriptors in the MS-ABI start with '_TI'
274     else if (SymName.startswith("_TI") || SymName.startswith("__TI")) {
275       ThrowInfo TI;
276       TI.Flags = *reinterpret_cast<const little32_t *>(SymContents.data());
277       collectRelocationOffsets(Obj, Sec, SecAddress, SymAddress, SymSize,
278                                SymName, TIEntries);
279       TIs[SymName] = TI;
280     }
281     // Catchable type arrays in the MS-ABI start with _CTA or __CTA.
282     else if (SymName.startswith("_CTA") || SymName.startswith("__CTA")) {
283       CatchableTypeArray CTA;
284       CTA.NumEntries =
285           *reinterpret_cast<const little32_t *>(SymContents.data());
286       collectRelocationOffsets(Obj, Sec, SecAddress, SymAddress, SymSize,
287                                SymName, CTAEntries);
288       CTAs[SymName] = CTA;
289     }
290     // Catchable types in the MS-ABI start with _CT or __CT.
291     else if (SymName.startswith("_CT") || SymName.startswith("__CT")) {
292       const little32_t *DataPtr =
293           reinterpret_cast<const little32_t *>(SymContents.data());
294       CatchableType CT;
295       CT.Flags = DataPtr[0];
296       CT.NonVirtualBaseAdjustmentOffset = DataPtr[2];
297       CT.VirtualBasePointerOffset = DataPtr[3];
298       CT.VirtualBaseAdjustmentOffset = DataPtr[4];
299       CT.Size = DataPtr[5];
300       StringRef *I = std::begin(CT.Symbols), *E = std::end(CT.Symbols);
301       collectRelocatedSymbols(Obj, Sec, SecAddress, SymAddress, SymSize, I, E);
302       CTs[SymName] = CT;
303     }
304     // Construction vtables in the Itanium ABI start with '_ZTT' or '__ZTT'.
305     else if (SymName.startswith("_ZTT") || SymName.startswith("__ZTT")) {
306       collectRelocationOffsets(Obj, Sec, SecAddress, SymAddress, SymSize,
307                                SymName, VTTEntries);
308     }
309     // Typeinfo names in the Itanium ABI start with '_ZTS' or '__ZTS'.
310     else if (SymName.startswith("_ZTS") || SymName.startswith("__ZTS")) {
311       TINames[SymName] = SymContents.slice(0, SymContents.find('\0'));
312     }
313     // Vtables in the Itanium ABI start with '_ZTV' or '__ZTV'.
314     else if (SymName.startswith("_ZTV") || SymName.startswith("__ZTV")) {
315       collectRelocationOffsets(Obj, Sec, SecAddress, SymAddress, SymSize,
316                                SymName, VTableSymEntries);
317       for (uint64_t SymOffI = 0; SymOffI < SymSize; SymOffI += BytesInAddress) {
318         auto Key = std::make_pair(SymName, SymOffI);
319         if (VTableSymEntries.count(Key))
320           continue;
321         const char *DataPtr =
322             SymContents.substr(SymOffI, BytesInAddress).data();
323         int64_t VData;
324         if (BytesInAddress == 8)
325           VData = *reinterpret_cast<const little64_t *>(DataPtr);
326         else
327           VData = *reinterpret_cast<const little32_t *>(DataPtr);
328         VTableDataEntries[Key] = VData;
329       }
330     }
331     // Typeinfo structures in the Itanium ABI start with '_ZTI' or '__ZTI'.
332     else if (SymName.startswith("_ZTI") || SymName.startswith("__ZTI")) {
333       // FIXME: Do something with these!
334     }
335   }
336   for (const auto &VFTableEntry : VFTableEntries) {
337     StringRef VFTableName = VFTableEntry.first.first;
338     uint64_t Offset = VFTableEntry.first.second;
339     StringRef SymName = VFTableEntry.second;
340     outs() << VFTableName << '[' << Offset << "]: " << SymName << '\n';
341   }
342   for (const auto &VBTable : VBTables) {
343     StringRef VBTableName = VBTable.first;
344     uint32_t Idx = 0;
345     for (little32_t Offset : VBTable.second) {
346       outs() << VBTableName << '[' << Idx << "]: " << Offset << '\n';
347       Idx += sizeof(Offset);
348     }
349   }
350   for (const auto &COLPair : COLs) {
351     StringRef COLName = COLPair.first;
352     const CompleteObjectLocator &COL = COLPair.second;
353     outs() << COLName << "[IsImageRelative]: " << COL.Data[0] << '\n';
354     outs() << COLName << "[OffsetToTop]: " << COL.Data[1] << '\n';
355     outs() << COLName << "[VFPtrOffset]: " << COL.Data[2] << '\n';
356     outs() << COLName << "[TypeDescriptor]: " << COL.Symbols[0] << '\n';
357     outs() << COLName << "[ClassHierarchyDescriptor]: " << COL.Symbols[1]
358            << '\n';
359   }
360   for (const auto &CHDPair : CHDs) {
361     StringRef CHDName = CHDPair.first;
362     const ClassHierarchyDescriptor &CHD = CHDPair.second;
363     outs() << CHDName << "[AlwaysZero]: " << CHD.Data[0] << '\n';
364     outs() << CHDName << "[Flags]: " << CHD.Data[1] << '\n';
365     outs() << CHDName << "[NumClasses]: " << CHD.Data[2] << '\n';
366     outs() << CHDName << "[BaseClassArray]: " << CHD.Symbols[0] << '\n';
367   }
368   for (const auto &BCAEntry : BCAEntries) {
369     StringRef BCAName = BCAEntry.first.first;
370     uint64_t Offset = BCAEntry.first.second;
371     StringRef SymName = BCAEntry.second;
372     outs() << BCAName << '[' << Offset << "]: " << SymName << '\n';
373   }
374   for (const auto &BCDPair : BCDs) {
375     StringRef BCDName = BCDPair.first;
376     const BaseClassDescriptor &BCD = BCDPair.second;
377     outs() << BCDName << "[TypeDescriptor]: " << BCD.Symbols[0] << '\n';
378     outs() << BCDName << "[NumBases]: " << BCD.Data[0] << '\n';
379     outs() << BCDName << "[OffsetInVBase]: " << BCD.Data[1] << '\n';
380     outs() << BCDName << "[VBPtrOffset]: " << BCD.Data[2] << '\n';
381     outs() << BCDName << "[OffsetInVBTable]: " << BCD.Data[3] << '\n';
382     outs() << BCDName << "[Flags]: " << BCD.Data[4] << '\n';
383     outs() << BCDName << "[ClassHierarchyDescriptor]: " << BCD.Symbols[1]
384            << '\n';
385   }
386   for (const auto &TDPair : TDs) {
387     StringRef TDName = TDPair.first;
388     const TypeDescriptor &TD = TDPair.second;
389     outs() << TDName << "[VFPtr]: " << TD.Symbols[0] << '\n';
390     outs() << TDName << "[AlwaysZero]: " << TD.AlwaysZero << '\n';
391     outs() << TDName << "[MangledName]: ";
392     outs().write_escaped(TD.MangledName.rtrim(StringRef("\0", 1)),
393                          /*UseHexEscapes=*/true)
394         << '\n';
395   }
396   for (const auto &TIPair : TIs) {
397     StringRef TIName = TIPair.first;
398     const ThrowInfo &TI = TIPair.second;
399     auto dumpThrowInfoFlag = [&](const char *Name, uint32_t Flag) {
400       outs() << TIName << "[Flags." << Name
401              << "]: " << (TI.Flags & Flag ? "true" : "false") << '\n';
402     };
403     auto dumpThrowInfoSymbol = [&](const char *Name, int Offset) {
404       outs() << TIName << '[' << Name << "]: ";
405       auto Entry = TIEntries.find(std::make_pair(TIName, Offset));
406       outs() << (Entry == TIEntries.end() ? "null" : Entry->second) << '\n';
407     };
408     outs() << TIName << "[Flags]: " << TI.Flags << '\n';
409     dumpThrowInfoFlag("Const", 1);
410     dumpThrowInfoFlag("Volatile", 2);
411     dumpThrowInfoSymbol("CleanupFn", 4);
412     dumpThrowInfoSymbol("ForwardCompat", 8);
413     dumpThrowInfoSymbol("CatchableTypeArray", 12);
414   }
415   for (const auto &CTAPair : CTAs) {
416     StringRef CTAName = CTAPair.first;
417     const CatchableTypeArray &CTA = CTAPair.second;
418 
419     outs() << CTAName << "[NumEntries]: " << CTA.NumEntries << '\n';
420 
421     unsigned Idx = 0;
422     for (auto I = CTAEntries.lower_bound(std::make_pair(CTAName, 0)),
423               E = CTAEntries.upper_bound(std::make_pair(CTAName, UINT64_MAX));
424          I != E; ++I)
425       outs() << CTAName << '[' << Idx++ << "]: " << I->second << '\n';
426   }
427   for (const auto &CTPair : CTs) {
428     StringRef CTName = CTPair.first;
429     const CatchableType &CT = CTPair.second;
430     auto dumpCatchableTypeFlag = [&](const char *Name, uint32_t Flag) {
431       outs() << CTName << "[Flags." << Name
432              << "]: " << (CT.Flags & Flag ? "true" : "false") << '\n';
433     };
434     outs() << CTName << "[Flags]: " << CT.Flags << '\n';
435     dumpCatchableTypeFlag("ScalarType", 1);
436     dumpCatchableTypeFlag("VirtualInheritance", 4);
437     outs() << CTName << "[TypeDescriptor]: " << CT.Symbols[0] << '\n';
438     outs() << CTName << "[NonVirtualBaseAdjustmentOffset]: "
439            << CT.NonVirtualBaseAdjustmentOffset << '\n';
440     outs() << CTName
441            << "[VirtualBasePointerOffset]: " << CT.VirtualBasePointerOffset
442            << '\n';
443     outs() << CTName << "[VirtualBaseAdjustmentOffset]: "
444            << CT.VirtualBaseAdjustmentOffset << '\n';
445     outs() << CTName << "[Size]: " << CT.Size << '\n';
446     outs() << CTName
447            << "[CopyCtor]: " << (CT.Symbols[1].empty() ? "null" : CT.Symbols[1])
448            << '\n';
449   }
450   for (const auto &VTTPair : VTTEntries) {
451     StringRef VTTName = VTTPair.first.first;
452     uint64_t VTTOffset = VTTPair.first.second;
453     StringRef VTTEntry = VTTPair.second;
454     outs() << VTTName << '[' << VTTOffset << "]: " << VTTEntry << '\n';
455   }
456   for (const auto &TIPair : TINames) {
457     StringRef TIName = TIPair.first;
458     outs() << TIName << ": " << TIPair.second << '\n';
459   }
460   auto VTableSymI = VTableSymEntries.begin();
461   auto VTableSymE = VTableSymEntries.end();
462   auto VTableDataI = VTableDataEntries.begin();
463   auto VTableDataE = VTableDataEntries.end();
464   for (;;) {
465     bool SymDone = VTableSymI == VTableSymE;
466     bool DataDone = VTableDataI == VTableDataE;
467     if (SymDone && DataDone)
468       break;
469     if (!SymDone && (DataDone || VTableSymI->first < VTableDataI->first)) {
470       StringRef VTableName = VTableSymI->first.first;
471       uint64_t Offset = VTableSymI->first.second;
472       StringRef VTableEntry = VTableSymI->second;
473       outs() << VTableName << '[' << Offset << "]: ";
474       outs() << VTableEntry;
475       outs() << '\n';
476       ++VTableSymI;
477       continue;
478     }
479     if (!DataDone && (SymDone || VTableDataI->first < VTableSymI->first)) {
480       StringRef VTableName = VTableDataI->first.first;
481       uint64_t Offset = VTableDataI->first.second;
482       int64_t VTableEntry = VTableDataI->second;
483       outs() << VTableName << '[' << Offset << "]: ";
484       outs() << VTableEntry;
485       outs() << '\n';
486       ++VTableDataI;
487       continue;
488     }
489   }
490 }
491 
dumpArchive(const Archive * Arc)492 static void dumpArchive(const Archive *Arc) {
493   Error Err;
494   for (auto &ArcC : Arc->children(Err)) {
495     Expected<std::unique_ptr<Binary>> ChildOrErr = ArcC.getAsBinary();
496     if (!ChildOrErr) {
497       // Ignore non-object files.
498       if (auto E = isNotObjectErrorInvalidFileType(ChildOrErr.takeError())) {
499         std::string Buf;
500         raw_string_ostream OS(Buf);
501         logAllUnhandledErrors(std::move(E), OS, "");
502         OS.flush();
503         reportError(Arc->getFileName(), Buf);
504       }
505       ChildOrErr.takeError();
506       continue;
507     }
508 
509     if (ObjectFile *Obj = dyn_cast<ObjectFile>(&*ChildOrErr.get()))
510       dumpCXXData(Obj);
511     else
512       reportError(Arc->getFileName(), cxxdump_error::unrecognized_file_format);
513   }
514   error(std::move(Err));
515 }
516 
dumpInput(StringRef File)517 static void dumpInput(StringRef File) {
518   // Attempt to open the binary.
519   Expected<OwningBinary<Binary>> BinaryOrErr = createBinary(File);
520   if (!BinaryOrErr) {
521     auto EC = errorToErrorCode(BinaryOrErr.takeError());
522     reportError(File, EC);
523     return;
524   }
525   Binary &Binary = *BinaryOrErr.get().getBinary();
526 
527   if (Archive *Arc = dyn_cast<Archive>(&Binary))
528     dumpArchive(Arc);
529   else if (ObjectFile *Obj = dyn_cast<ObjectFile>(&Binary))
530     dumpCXXData(Obj);
531   else
532     reportError(File, cxxdump_error::unrecognized_file_format);
533 }
534 
main(int argc,const char * argv[])535 int main(int argc, const char *argv[]) {
536   sys::PrintStackTraceOnErrorSignal(argv[0]);
537   PrettyStackTraceProgram X(argc, argv);
538   llvm_shutdown_obj Y;
539 
540   // Initialize targets.
541   llvm::InitializeAllTargetInfos();
542 
543   // Register the target printer for --version.
544   cl::AddExtraVersionPrinter(TargetRegistry::printRegisteredTargetsForVersion);
545 
546   cl::ParseCommandLineOptions(argc, argv, "LLVM C++ ABI Data Dumper\n");
547 
548   // Default to stdin if no filename is specified.
549   if (opts::InputFilenames.size() == 0)
550     opts::InputFilenames.push_back("-");
551 
552   std::for_each(opts::InputFilenames.begin(), opts::InputFilenames.end(),
553                 dumpInput);
554 
555   return EXIT_SUCCESS;
556 }
557