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