llvm-project

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
}
564