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
31using namespace llvm;
32using namespace llvm::object;
33using namespace llvm::support;
34
35namespace opts {
36static cl::OptionCategory CXXDumpCategory("CXX Dump Options");
37cl::list<std::string> InputFilenames(cl::Positional,
38 cl::desc("<input object files>"),
39 cl::cat(CXXDumpCategory));
40} // namespace opts
41
42namespace llvm {
43
44static void error(std::error_code EC) {
45 if (!EC)
46 return;
47 WithColor::error(OS&: outs(), Prefix: "") << "reading file: " << EC.message() << ".\n";
48 outs().flush();
49 exit(status: 1);
50}
51
52[[noreturn]] static void error(Error Err) {
53 logAllUnhandledErrors(E: std::move(Err), OS&: WithColor::error(OS&: outs()),
54 ErrorBanner: "reading file: ");
55 outs().flush();
56 exit(status: 1);
57}
58
59template <typename T>
60T unwrapOrError(Expected<T> EO) {
61 if (!EO)
62 error(EO.takeError());
63 return std::move(*EO);
64}
65
66} // namespace llvm
67
68static void reportError(StringRef Input, StringRef Message) {
69 if (Input == "-")
70 Input = "<stdin>";
71 WithColor::error(OS&: errs(), Prefix: Input) << Message << "\n";
72 errs().flush();
73 exit(status: 1);
74}
75
76static void reportError(StringRef Input, std::error_code EC) {
77 reportError(Input, Message: EC.message());
78}
79
80static std::map<SectionRef, SmallVector<SectionRef, 1>> SectionRelocMap;
81
82static 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(EC: errorToErrorCode(Err: RelocSymName.takeError()));
97 uint64_t Offset = Reloc.getOffset();
98 if (Offset >= SymOffset && Offset < SymEnd) {
99 *I = *RelocSymName;
100 ++I;
101 }
102 }
103 }
104}
105
106static 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(EC: errorToErrorCode(Err: RelocSymName.takeError()));
119 uint64_t Offset = Reloc.getOffset();
120 if (Offset >= SymOffset && Offset < SymEnd)
121 Collection[std::make_pair(x&: SymName, y: Offset - SymOffset)] = *RelocSymName;
122 }
123 }
124}
125
126static 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(Err: ErrOrSec.takeError());
181
182 section_iterator Sec2 = *ErrOrSec;
183 if (Sec2 != Obj->section_end())
184 SectionRelocMap[*Sec2].push_back(Elt: Section);
185 }
186
187 uint8_t BytesInAddress = Obj->getBytesInAddress();
188
189 std::vector<std::pair<SymbolRef, uint64_t>> SymAddr =
190 object::computeSymbolSizes(O: *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(EC: errorToErrorCode(Err: SymNameOrErr.takeError()));
197 StringRef SymName = *SymNameOrErr;
198 Expected<object::section_iterator> SecIOrErr = Sym.getSection();
199 error(EC: errorToErrorCode(Err: 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(EO: Sec.getContents());
209 Expected<uint64_t> SymAddressOrErr = Sym.getAddress();
210 error(EC: errorToErrorCode(Err: 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(Start: SymOffset, N: 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(Prefix: "??_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, SymAddress: SecAddress, SymSize: SecSize,
224 SymName, Collection&: 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(Prefix: "??_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(Prefix: "??_R4")) {
236 CompleteObjectLocator COL;
237 COL.Data =
238 ArrayRef(reinterpret_cast<const little32_t *>(SymContents.data()), 3);
239 StringRef *I = std::begin(arr&: COL.Symbols), *E = std::end(arr&: 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(Prefix: "??_R3")) {
245 ClassHierarchyDescriptor CHD;
246 CHD.Data =
247 ArrayRef(reinterpret_cast<const little32_t *>(SymContents.data()), 3);
248 StringRef *I = std::begin(arr&: CHD.Symbols), *E = std::end(arr&: 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(Prefix: "??_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, Collection&: BCAEntries);
258 }
259 // Base class descriptors in the MS-ABI start with '??_R1'
260 else if (SymName.starts_with(Prefix: "??_R1")) {
261 BaseClassDescriptor BCD;
262 BCD.Data = ArrayRef(
263 reinterpret_cast<const little32_t *>(SymContents.data()) + 1, 5);
264 StringRef *I = std::begin(arr&: BCD.Symbols), *E = std::end(arr&: 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(Prefix: "??_R0")) {
270 const char *DataPtr = SymContents.drop_front(N: 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(N: BytesInAddress * 2);
277 StringRef *I = std::begin(arr&: TD.Symbols), *E = std::end(arr&: 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(Prefix: "_TI") || SymName.starts_with(Prefix: "__TI")) {
283 ThrowInfo TI;
284 TI.Flags = *reinterpret_cast<const little32_t *>(SymContents.data());
285 collectRelocationOffsets(Obj, Sec, SecAddress, SymAddress, SymSize,
286 SymName, Collection&: 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(Prefix: "_CTA") || SymName.starts_with(Prefix: "__CTA")) {
291 CatchableTypeArray CTA;
292 CTA.NumEntries =
293 *reinterpret_cast<const little32_t *>(SymContents.data());
294 collectRelocationOffsets(Obj, Sec, SecAddress, SymAddress, SymSize,
295 SymName, Collection&: CTAEntries);
296 CTAs[SymName] = CTA;
297 }
298 // Catchable types in the MS-ABI start with _CT or __CT.
299 else if (SymName.starts_with(Prefix: "_CT") || SymName.starts_with(Prefix: "__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(arr&: CT.Symbols), *E = std::end(arr&: 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(Prefix: "_ZTT") || SymName.starts_with(Prefix: "__ZTT")) {
314 collectRelocationOffsets(Obj, Sec, SecAddress, SymAddress, SymSize,
315 SymName, Collection&: VTTEntries);
316 }
317 // Typeinfo names in the Itanium ABI start with '_ZTS' or '__ZTS'.
318 else if (SymName.starts_with(Prefix: "_ZTS") || SymName.starts_with(Prefix: "__ZTS")) {
319 TINames[SymName] = SymContents.slice(Start: 0, End: SymContents.find(C: '\0'));
320 }
321 // Vtables in the Itanium ABI start with '_ZTV' or '__ZTV'.
322 else if (SymName.starts_with(Prefix: "_ZTV") || SymName.starts_with(Prefix: "__ZTV")) {
323 collectRelocationOffsets(Obj, Sec, SecAddress, SymAddress, SymSize,
324 SymName, Collection&: VTableSymEntries);
325 for (uint64_t SymOffI = 0; SymOffI < SymSize; SymOffI += BytesInAddress) {
326 auto Key = std::make_pair(x&: SymName, y&: SymOffI);
327 if (VTableSymEntries.count(x: Key))
328 continue;
329 const char *DataPtr =
330 SymContents.substr(Start: SymOffI, N: 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(Prefix: "_ZTI") || SymName.starts_with(Prefix: "__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(Str: TD.MangledName.rtrim(Chars: 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(x: std::make_pair(x&: TIName, y&: 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(x: std::make_pair(x&: CTAName, y: 0)),
431 E = CTAEntries.upper_bound(x: std::make_pair(x&: 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
500static 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(Err: ChildOrErr.takeError())) {
507 std::string Buf;
508 raw_string_ostream OS(Buf);
509 logAllUnhandledErrors(E: std::move(E), OS);
510 OS.flush();
511 reportError(Input: Arc->getFileName(), Message: Buf);
512 }
513 consumeError(Err: ChildOrErr.takeError());
514 continue;
515 }
516
517 if (ObjectFile *Obj = dyn_cast<ObjectFile>(Val: &*ChildOrErr.get()))
518 dumpCXXData(Obj);
519 else
520 reportError(Input: Arc->getFileName(), EC: cxxdump_error::unrecognized_file_format);
521 }
522 if (Err)
523 error(Err: std::move(Err));
524}
525
526static void dumpInput(StringRef File) {
527 // Attempt to open the binary.
528 Expected<OwningBinary<Binary>> BinaryOrErr = createBinary(Path: File);
529 if (!BinaryOrErr) {
530 auto EC = errorToErrorCode(Err: BinaryOrErr.takeError());
531 reportError(Input: File, EC);
532 return;
533 }
534 Binary &Binary = *BinaryOrErr.get().getBinary();
535
536 if (Archive *Arc = dyn_cast<Archive>(Val: &Binary))
537 dumpArchive(Arc);
538 else if (ObjectFile *Obj = dyn_cast<ObjectFile>(Val: &Binary))
539 dumpCXXData(Obj);
540 else
541 reportError(Input: File, EC: cxxdump_error::unrecognized_file_format);
542}
543
544int 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(func: TargetRegistry::printRegisteredTargetsForVersion);
552
553 cl::HideUnrelatedOptions(Categories: {&opts::CXXDumpCategory, &getColorCategory()});
554 cl::ParseCommandLineOptions(argc, argv, Overview: "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(value: "-");
559
560 llvm::for_each(Range&: opts::InputFilenames, F: dumpInput);
561
562 return EXIT_SUCCESS;
563}
564