1//===-- llvm-nm.cpp - Symbol table dumping utility for llvm ---------------===//
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// This program is a utility that works like traditional Unix "nm", that is, it
11// prints out the names of symbols in a bitcode or object file, along with some
12// information about each symbol.
13//
14// This "nm" supports many of the features of GNU "nm", including its different
15// output formats.
16//
17//===----------------------------------------------------------------------===//
18
19#include "llvm/IR/Function.h"
20#include "llvm/IR/GlobalAlias.h"
21#include "llvm/IR/GlobalVariable.h"
22#include "llvm/IR/LLVMContext.h"
23#include "llvm/Object/Archive.h"
24#include "llvm/Object/COFF.h"
25#include "llvm/Object/ELFObjectFile.h"
26#include "llvm/Object/IRObjectFile.h"
27#include "llvm/Object/MachO.h"
28#include "llvm/Object/MachOUniversal.h"
29#include "llvm/Object/ObjectFile.h"
30#include "llvm/Support/COFF.h"
31#include "llvm/Support/CommandLine.h"
32#include "llvm/Support/FileSystem.h"
33#include "llvm/Support/Format.h"
34#include "llvm/Support/ManagedStatic.h"
35#include "llvm/Support/MemoryBuffer.h"
36#include "llvm/Support/PrettyStackTrace.h"
37#include "llvm/Support/Program.h"
38#include "llvm/Support/Signals.h"
39#include "llvm/Support/TargetSelect.h"
40#include "llvm/Support/raw_ostream.h"
41#include <algorithm>
42#include <cctype>
43#include <cerrno>
44#include <cstring>
45#include <system_error>
46#include <vector>
47using namespace llvm;
48using namespace object;
49
50namespace {
51enum OutputFormatTy { bsd, sysv, posix, darwin };
52cl::opt<OutputFormatTy> OutputFormat(
53    "format", cl::desc("Specify output format"),
54    cl::values(clEnumVal(bsd, "BSD format"), clEnumVal(sysv, "System V format"),
55               clEnumVal(posix, "POSIX.2 format"),
56               clEnumVal(darwin, "Darwin -m format"), clEnumValEnd),
57    cl::init(bsd));
58cl::alias OutputFormat2("f", cl::desc("Alias for --format"),
59                        cl::aliasopt(OutputFormat));
60
61cl::list<std::string> InputFilenames(cl::Positional, cl::desc("<input files>"),
62                                     cl::ZeroOrMore);
63
64cl::opt<bool> UndefinedOnly("undefined-only",
65                            cl::desc("Show only undefined symbols"));
66cl::alias UndefinedOnly2("u", cl::desc("Alias for --undefined-only"),
67                         cl::aliasopt(UndefinedOnly));
68
69cl::opt<bool> DynamicSyms("dynamic",
70                          cl::desc("Display the dynamic symbols instead "
71                                   "of normal symbols."));
72cl::alias DynamicSyms2("D", cl::desc("Alias for --dynamic"),
73                       cl::aliasopt(DynamicSyms));
74
75cl::opt<bool> DefinedOnly("defined-only",
76                          cl::desc("Show only defined symbols"));
77cl::alias DefinedOnly2("U", cl::desc("Alias for --defined-only"),
78                       cl::aliasopt(DefinedOnly));
79
80cl::opt<bool> ExternalOnly("extern-only",
81                           cl::desc("Show only external symbols"));
82cl::alias ExternalOnly2("g", cl::desc("Alias for --extern-only"),
83                        cl::aliasopt(ExternalOnly));
84
85cl::opt<bool> BSDFormat("B", cl::desc("Alias for --format=bsd"));
86cl::opt<bool> POSIXFormat("P", cl::desc("Alias for --format=posix"));
87cl::opt<bool> DarwinFormat("m", cl::desc("Alias for --format=darwin"));
88
89static cl::list<std::string>
90    ArchFlags("arch", cl::desc("architecture(s) from a Mach-O file to dump"),
91              cl::ZeroOrMore);
92bool ArchAll = false;
93
94cl::opt<bool> PrintFileName(
95    "print-file-name",
96    cl::desc("Precede each symbol with the object file it came from"));
97
98cl::alias PrintFileNameA("A", cl::desc("Alias for --print-file-name"),
99                         cl::aliasopt(PrintFileName));
100cl::alias PrintFileNameo("o", cl::desc("Alias for --print-file-name"),
101                         cl::aliasopt(PrintFileName));
102
103cl::opt<bool> DebugSyms("debug-syms",
104                        cl::desc("Show all symbols, even debugger only"));
105cl::alias DebugSymsa("a", cl::desc("Alias for --debug-syms"),
106                     cl::aliasopt(DebugSyms));
107
108cl::opt<bool> NumericSort("numeric-sort", cl::desc("Sort symbols by address"));
109cl::alias NumericSortn("n", cl::desc("Alias for --numeric-sort"),
110                       cl::aliasopt(NumericSort));
111cl::alias NumericSortv("v", cl::desc("Alias for --numeric-sort"),
112                       cl::aliasopt(NumericSort));
113
114cl::opt<bool> NoSort("no-sort", cl::desc("Show symbols in order encountered"));
115cl::alias NoSortp("p", cl::desc("Alias for --no-sort"), cl::aliasopt(NoSort));
116
117cl::opt<bool> ReverseSort("reverse-sort", cl::desc("Sort in reverse order"));
118cl::alias ReverseSortr("r", cl::desc("Alias for --reverse-sort"),
119                       cl::aliasopt(ReverseSort));
120
121cl::opt<bool> PrintSize("print-size",
122                        cl::desc("Show symbol size instead of address"));
123cl::alias PrintSizeS("S", cl::desc("Alias for --print-size"),
124                     cl::aliasopt(PrintSize));
125
126cl::opt<bool> SizeSort("size-sort", cl::desc("Sort symbols by size"));
127
128cl::opt<bool> WithoutAliases("without-aliases", cl::Hidden,
129                             cl::desc("Exclude aliases from output"));
130
131cl::opt<bool> ArchiveMap("print-armap", cl::desc("Print the archive map"));
132cl::alias ArchiveMaps("M", cl::desc("Alias for --print-armap"),
133                      cl::aliasopt(ArchiveMap));
134
135cl::opt<bool> JustSymbolName("just-symbol-name",
136                             cl::desc("Print just the symbol's name"));
137cl::alias JustSymbolNames("j", cl::desc("Alias for --just-symbol-name"),
138                          cl::aliasopt(JustSymbolName));
139
140// FIXME: This option takes exactly two strings and should be allowed anywhere
141// on the command line.  Such that "llvm-nm -s __TEXT __text foo.o" would work.
142// But that does not as the CommandLine Library does not have a way to make
143// this work.  For now the "-s __TEXT __text" has to be last on the command
144// line.
145cl::list<std::string> SegSect("s", cl::Positional, cl::ZeroOrMore,
146                              cl::desc("Dump only symbols from this segment "
147                                       "and section name, Mach-O only"));
148
149cl::opt<bool> FormatMachOasHex("x", cl::desc("Print symbol entry in hex, "
150                                             "Mach-O only"));
151
152cl::opt<bool> NoLLVMBitcode("no-llvm-bc",
153                            cl::desc("Disable LLVM bitcode reader"));
154
155bool PrintAddress = true;
156
157bool MultipleFiles = false;
158
159bool HadError = false;
160
161std::string ToolName;
162}
163
164static void error(Twine Message, Twine Path = Twine()) {
165  HadError = true;
166  errs() << ToolName << ": " << Path << ": " << Message << ".\n";
167}
168
169static bool error(std::error_code EC, Twine Path = Twine()) {
170  if (EC) {
171    error(EC.message(), Path);
172    return true;
173  }
174  return false;
175}
176
177namespace {
178struct NMSymbol {
179  uint64_t Address;
180  uint64_t Size;
181  char TypeChar;
182  StringRef Name;
183  DataRefImpl Symb;
184};
185}
186
187static bool compareSymbolAddress(const NMSymbol &A, const NMSymbol &B) {
188  if (!ReverseSort) {
189    if (A.Address < B.Address)
190      return true;
191    if (A.Address == B.Address && A.Name < B.Name)
192      return true;
193    if (A.Address == B.Address && A.Name == B.Name && A.Size < B.Size)
194      return true;
195    return false;
196  }
197
198  if (A.Address > B.Address)
199    return true;
200  if (A.Address == B.Address && A.Name > B.Name)
201    return true;
202  if (A.Address == B.Address && A.Name == B.Name && A.Size > B.Size)
203    return true;
204  return false;
205}
206
207static bool compareSymbolSize(const NMSymbol &A, const NMSymbol &B) {
208  if (!ReverseSort) {
209    if (A.Size < B.Size)
210      return true;
211    if (A.Size == B.Size && A.Name < B.Name)
212      return true;
213    if (A.Size == B.Size && A.Name == B.Name && A.Address < B.Address)
214      return true;
215    return false;
216  }
217
218  if (A.Size > B.Size)
219    return true;
220  if (A.Size == B.Size && A.Name > B.Name)
221    return true;
222  if (A.Size == B.Size && A.Name == B.Name && A.Address > B.Address)
223    return true;
224  return false;
225}
226
227static bool compareSymbolName(const NMSymbol &A, const NMSymbol &B) {
228  if (!ReverseSort) {
229    if (A.Name < B.Name)
230      return true;
231    if (A.Name == B.Name && A.Size < B.Size)
232      return true;
233    if (A.Name == B.Name && A.Size == B.Size && A.Address < B.Address)
234      return true;
235    return false;
236  }
237  if (A.Name > B.Name)
238    return true;
239  if (A.Name == B.Name && A.Size > B.Size)
240    return true;
241  if (A.Name == B.Name && A.Size == B.Size && A.Address > B.Address)
242    return true;
243  return false;
244}
245
246static char isSymbolList64Bit(SymbolicFile &Obj) {
247  if (isa<IRObjectFile>(Obj))
248    return false;
249  if (isa<COFFObjectFile>(Obj))
250    return false;
251  if (MachOObjectFile *MachO = dyn_cast<MachOObjectFile>(&Obj))
252    return MachO->is64Bit();
253  if (isa<ELF32LEObjectFile>(Obj))
254    return false;
255  if (isa<ELF64LEObjectFile>(Obj))
256    return true;
257  if (isa<ELF32BEObjectFile>(Obj))
258    return false;
259  if (isa<ELF64BEObjectFile>(Obj))
260    return true;
261  return false;
262}
263
264static StringRef CurrentFilename;
265typedef std::vector<NMSymbol> SymbolListT;
266static SymbolListT SymbolList;
267
268// darwinPrintSymbol() is used to print a symbol from a Mach-O file when the
269// the OutputFormat is darwin or we are printing Mach-O symbols in hex.  For
270// the darwin format it produces the same output as darwin's nm(1) -m output
271// and when printing Mach-O symbols in hex it produces the same output as
272// darwin's nm(1) -x format.
273static void darwinPrintSymbol(MachOObjectFile *MachO, SymbolListT::iterator I,
274                              char *SymbolAddrStr, const char *printBlanks) {
275  MachO::mach_header H;
276  MachO::mach_header_64 H_64;
277  uint32_t Filetype, Flags;
278  MachO::nlist_64 STE_64;
279  MachO::nlist STE;
280  uint8_t NType;
281  uint8_t NSect;
282  uint16_t NDesc;
283  uint32_t NStrx;
284  uint64_t NValue;
285  if (MachO->is64Bit()) {
286    H_64 = MachO->MachOObjectFile::getHeader64();
287    Filetype = H_64.filetype;
288    Flags = H_64.flags;
289    STE_64 = MachO->getSymbol64TableEntry(I->Symb);
290    NType = STE_64.n_type;
291    NSect = STE_64.n_sect;
292    NDesc = STE_64.n_desc;
293    NStrx = STE_64.n_strx;
294    NValue = STE_64.n_value;
295  } else {
296    H = MachO->MachOObjectFile::getHeader();
297    Filetype = H.filetype;
298    Flags = H.flags;
299    STE = MachO->getSymbolTableEntry(I->Symb);
300    NType = STE.n_type;
301    NSect = STE.n_sect;
302    NDesc = STE.n_desc;
303    NStrx = STE.n_strx;
304    NValue = STE.n_value;
305  }
306
307  // If we are printing Mach-O symbols in hex do that and return.
308  if (FormatMachOasHex) {
309    char Str[18] = "";
310    const char *printFormat;
311    if (MachO->is64Bit())
312      printFormat = "%016" PRIx64;
313    else
314      printFormat = "%08" PRIx64;
315    format(printFormat, NValue).print(Str, sizeof(Str));
316    outs() << Str << ' ';
317    format("%02x", NType).print(Str, sizeof(Str));
318    outs() << Str << ' ';
319    format("%02x", NSect).print(Str, sizeof(Str));
320    outs() << Str << ' ';
321    format("%04x", NDesc).print(Str, sizeof(Str));
322    outs() << Str << ' ';
323    format("%08x", NStrx).print(Str, sizeof(Str));
324    outs() << Str << ' ';
325    outs() << I->Name << "\n";
326    return;
327  }
328
329  if (PrintAddress) {
330    if ((NType & MachO::N_TYPE) == MachO::N_INDR)
331      strcpy(SymbolAddrStr, printBlanks);
332    outs() << SymbolAddrStr << ' ';
333  }
334
335  switch (NType & MachO::N_TYPE) {
336  case MachO::N_UNDF:
337    if (NValue != 0) {
338      outs() << "(common) ";
339      if (MachO::GET_COMM_ALIGN(NDesc) != 0)
340        outs() << "(alignment 2^" << (int)MachO::GET_COMM_ALIGN(NDesc) << ") ";
341    } else {
342      if ((NType & MachO::N_TYPE) == MachO::N_PBUD)
343        outs() << "(prebound ";
344      else
345        outs() << "(";
346      if ((NDesc & MachO::REFERENCE_TYPE) ==
347          MachO::REFERENCE_FLAG_UNDEFINED_LAZY)
348        outs() << "undefined [lazy bound]) ";
349      else if ((NDesc & MachO::REFERENCE_TYPE) ==
350               MachO::REFERENCE_FLAG_UNDEFINED_LAZY)
351        outs() << "undefined [private lazy bound]) ";
352      else if ((NDesc & MachO::REFERENCE_TYPE) ==
353               MachO::REFERENCE_FLAG_PRIVATE_UNDEFINED_NON_LAZY)
354        outs() << "undefined [private]) ";
355      else
356        outs() << "undefined) ";
357    }
358    break;
359  case MachO::N_ABS:
360    outs() << "(absolute) ";
361    break;
362  case MachO::N_INDR:
363    outs() << "(indirect) ";
364    break;
365  case MachO::N_SECT: {
366    section_iterator Sec = MachO->section_end();
367    MachO->getSymbolSection(I->Symb, Sec);
368    DataRefImpl Ref = Sec->getRawDataRefImpl();
369    StringRef SectionName;
370    MachO->getSectionName(Ref, SectionName);
371    StringRef SegmentName = MachO->getSectionFinalSegmentName(Ref);
372    outs() << "(" << SegmentName << "," << SectionName << ") ";
373    break;
374  }
375  default:
376    outs() << "(?) ";
377    break;
378  }
379
380  if (NType & MachO::N_EXT) {
381    if (NDesc & MachO::REFERENCED_DYNAMICALLY)
382      outs() << "[referenced dynamically] ";
383    if (NType & MachO::N_PEXT) {
384      if ((NDesc & MachO::N_WEAK_DEF) == MachO::N_WEAK_DEF)
385        outs() << "weak private external ";
386      else
387        outs() << "private external ";
388    } else {
389      if ((NDesc & MachO::N_WEAK_REF) == MachO::N_WEAK_REF ||
390          (NDesc & MachO::N_WEAK_DEF) == MachO::N_WEAK_DEF) {
391        if ((NDesc & (MachO::N_WEAK_REF | MachO::N_WEAK_DEF)) ==
392            (MachO::N_WEAK_REF | MachO::N_WEAK_DEF))
393          outs() << "weak external automatically hidden ";
394        else
395          outs() << "weak external ";
396      } else
397        outs() << "external ";
398    }
399  } else {
400    if (NType & MachO::N_PEXT)
401      outs() << "non-external (was a private external) ";
402    else
403      outs() << "non-external ";
404  }
405
406  if (Filetype == MachO::MH_OBJECT &&
407      (NDesc & MachO::N_NO_DEAD_STRIP) == MachO::N_NO_DEAD_STRIP)
408    outs() << "[no dead strip] ";
409
410  if (Filetype == MachO::MH_OBJECT &&
411      ((NType & MachO::N_TYPE) != MachO::N_UNDF) &&
412      (NDesc & MachO::N_SYMBOL_RESOLVER) == MachO::N_SYMBOL_RESOLVER)
413    outs() << "[symbol resolver] ";
414
415  if (Filetype == MachO::MH_OBJECT &&
416      ((NType & MachO::N_TYPE) != MachO::N_UNDF) &&
417      (NDesc & MachO::N_ALT_ENTRY) == MachO::N_ALT_ENTRY)
418    outs() << "[alt entry] ";
419
420  if ((NDesc & MachO::N_ARM_THUMB_DEF) == MachO::N_ARM_THUMB_DEF)
421    outs() << "[Thumb] ";
422
423  if ((NType & MachO::N_TYPE) == MachO::N_INDR) {
424    outs() << I->Name << " (for ";
425    StringRef IndirectName;
426    if (MachO->getIndirectName(I->Symb, IndirectName))
427      outs() << "?)";
428    else
429      outs() << IndirectName << ")";
430  } else
431    outs() << I->Name;
432
433  if ((Flags & MachO::MH_TWOLEVEL) == MachO::MH_TWOLEVEL &&
434      (((NType & MachO::N_TYPE) == MachO::N_UNDF && NValue == 0) ||
435       (NType & MachO::N_TYPE) == MachO::N_PBUD)) {
436    uint32_t LibraryOrdinal = MachO::GET_LIBRARY_ORDINAL(NDesc);
437    if (LibraryOrdinal != 0) {
438      if (LibraryOrdinal == MachO::EXECUTABLE_ORDINAL)
439        outs() << " (from executable)";
440      else if (LibraryOrdinal == MachO::DYNAMIC_LOOKUP_ORDINAL)
441        outs() << " (dynamically looked up)";
442      else {
443        StringRef LibraryName;
444        if (MachO->getLibraryShortNameByIndex(LibraryOrdinal - 1, LibraryName))
445          outs() << " (from bad library ordinal " << LibraryOrdinal << ")";
446        else
447          outs() << " (from " << LibraryName << ")";
448      }
449    }
450  }
451
452  outs() << "\n";
453}
454
455// Table that maps Darwin's Mach-O stab constants to strings to allow printing.
456struct DarwinStabName {
457  uint8_t NType;
458  const char *Name;
459};
460static const struct DarwinStabName DarwinStabNames[] = {
461    {MachO::N_GSYM, "GSYM"},
462    {MachO::N_FNAME, "FNAME"},
463    {MachO::N_FUN, "FUN"},
464    {MachO::N_STSYM, "STSYM"},
465    {MachO::N_LCSYM, "LCSYM"},
466    {MachO::N_BNSYM, "BNSYM"},
467    {MachO::N_PC, "PC"},
468    {MachO::N_AST, "AST"},
469    {MachO::N_OPT, "OPT"},
470    {MachO::N_RSYM, "RSYM"},
471    {MachO::N_SLINE, "SLINE"},
472    {MachO::N_ENSYM, "ENSYM"},
473    {MachO::N_SSYM, "SSYM"},
474    {MachO::N_SO, "SO"},
475    {MachO::N_OSO, "OSO"},
476    {MachO::N_LSYM, "LSYM"},
477    {MachO::N_BINCL, "BINCL"},
478    {MachO::N_SOL, "SOL"},
479    {MachO::N_PARAMS, "PARAM"},
480    {MachO::N_VERSION, "VERS"},
481    {MachO::N_OLEVEL, "OLEV"},
482    {MachO::N_PSYM, "PSYM"},
483    {MachO::N_EINCL, "EINCL"},
484    {MachO::N_ENTRY, "ENTRY"},
485    {MachO::N_LBRAC, "LBRAC"},
486    {MachO::N_EXCL, "EXCL"},
487    {MachO::N_RBRAC, "RBRAC"},
488    {MachO::N_BCOMM, "BCOMM"},
489    {MachO::N_ECOMM, "ECOMM"},
490    {MachO::N_ECOML, "ECOML"},
491    {MachO::N_LENG, "LENG"},
492    {0, 0}};
493static const char *getDarwinStabString(uint8_t NType) {
494  for (unsigned i = 0; DarwinStabNames[i].Name; i++) {
495    if (DarwinStabNames[i].NType == NType)
496      return DarwinStabNames[i].Name;
497  }
498  return 0;
499}
500
501// darwinPrintStab() prints the n_sect, n_desc along with a symbolic name of
502// a stab n_type value in a Mach-O file.
503static void darwinPrintStab(MachOObjectFile *MachO, SymbolListT::iterator I) {
504  MachO::nlist_64 STE_64;
505  MachO::nlist STE;
506  uint8_t NType;
507  uint8_t NSect;
508  uint16_t NDesc;
509  if (MachO->is64Bit()) {
510    STE_64 = MachO->getSymbol64TableEntry(I->Symb);
511    NType = STE_64.n_type;
512    NSect = STE_64.n_sect;
513    NDesc = STE_64.n_desc;
514  } else {
515    STE = MachO->getSymbolTableEntry(I->Symb);
516    NType = STE.n_type;
517    NSect = STE.n_sect;
518    NDesc = STE.n_desc;
519  }
520
521  char Str[18] = "";
522  format("%02x", NSect).print(Str, sizeof(Str));
523  outs() << ' ' << Str << ' ';
524  format("%04x", NDesc).print(Str, sizeof(Str));
525  outs() << Str << ' ';
526  if (const char *stabString = getDarwinStabString(NType))
527    format("%5.5s", stabString).print(Str, sizeof(Str));
528  else
529    format("   %02x", NType).print(Str, sizeof(Str));
530  outs() << Str;
531}
532
533static void sortAndPrintSymbolList(SymbolicFile &Obj, bool printName,
534                                   std::string ArchiveName,
535                                   std::string ArchitectureName) {
536  if (!NoSort) {
537    if (NumericSort)
538      std::sort(SymbolList.begin(), SymbolList.end(), compareSymbolAddress);
539    else if (SizeSort)
540      std::sort(SymbolList.begin(), SymbolList.end(), compareSymbolSize);
541    else
542      std::sort(SymbolList.begin(), SymbolList.end(), compareSymbolName);
543  }
544
545  if (!PrintFileName) {
546    if (OutputFormat == posix && MultipleFiles && printName) {
547      outs() << '\n' << CurrentFilename << ":\n";
548    } else if (OutputFormat == bsd && MultipleFiles && printName) {
549      outs() << "\n" << CurrentFilename << ":\n";
550    } else if (OutputFormat == sysv) {
551      outs() << "\n\nSymbols from " << CurrentFilename << ":\n\n"
552             << "Name                  Value   Class        Type"
553             << "         Size   Line  Section\n";
554    }
555  }
556
557  const char *printBlanks, *printFormat;
558  if (isSymbolList64Bit(Obj)) {
559    printBlanks = "                ";
560    printFormat = "%016" PRIx64;
561  } else {
562    printBlanks = "        ";
563    printFormat = "%08" PRIx64;
564  }
565
566  for (SymbolListT::iterator I = SymbolList.begin(), E = SymbolList.end();
567       I != E; ++I) {
568    if ((I->TypeChar != 'U') && UndefinedOnly)
569      continue;
570    if ((I->TypeChar == 'U') && DefinedOnly)
571      continue;
572    if (SizeSort && !PrintAddress && I->Size == UnknownAddressOrSize)
573      continue;
574    if (PrintFileName) {
575      if (!ArchitectureName.empty())
576        outs() << "(for architecture " << ArchitectureName << "):";
577      if (!ArchiveName.empty())
578        outs() << ArchiveName << ":";
579      outs() << CurrentFilename << ": ";
580    }
581    if (JustSymbolName || (UndefinedOnly && isa<MachOObjectFile>(Obj))) {
582      outs() << I->Name << "\n";
583      continue;
584    }
585
586    char SymbolAddrStr[18] = "";
587    char SymbolSizeStr[18] = "";
588
589    if (OutputFormat == sysv || I->Address == UnknownAddressOrSize)
590      strcpy(SymbolAddrStr, printBlanks);
591    if (OutputFormat == sysv)
592      strcpy(SymbolSizeStr, printBlanks);
593
594    if (I->Address != UnknownAddressOrSize)
595      format(printFormat, I->Address)
596          .print(SymbolAddrStr, sizeof(SymbolAddrStr));
597    if (I->Size != UnknownAddressOrSize)
598      format(printFormat, I->Size).print(SymbolSizeStr, sizeof(SymbolSizeStr));
599
600    // If OutputFormat is darwin or we are printing Mach-O symbols in hex and
601    // we have a MachOObjectFile, call darwinPrintSymbol to print as darwin's
602    // nm(1) -m output or hex, else if OutputFormat is darwin or we are
603    // printing Mach-O symbols in hex and not a Mach-O object fall back to
604    // OutputFormat bsd (see below).
605    MachOObjectFile *MachO = dyn_cast<MachOObjectFile>(&Obj);
606    if ((OutputFormat == darwin || FormatMachOasHex) && MachO) {
607      darwinPrintSymbol(MachO, I, SymbolAddrStr, printBlanks);
608    } else if (OutputFormat == posix) {
609      outs() << I->Name << " " << I->TypeChar << " " << SymbolAddrStr
610             << SymbolSizeStr << "\n";
611    } else if (OutputFormat == bsd || (OutputFormat == darwin && !MachO)) {
612      if (PrintAddress)
613        outs() << SymbolAddrStr << ' ';
614      if (PrintSize) {
615        outs() << SymbolSizeStr;
616        if (I->Size != UnknownAddressOrSize)
617          outs() << ' ';
618      }
619      outs() << I->TypeChar;
620      if (I->TypeChar == '-' && MachO)
621        darwinPrintStab(MachO, I);
622      outs() << " " << I->Name << "\n";
623    } else if (OutputFormat == sysv) {
624      std::string PaddedName(I->Name);
625      while (PaddedName.length() < 20)
626        PaddedName += " ";
627      outs() << PaddedName << "|" << SymbolAddrStr << "|   " << I->TypeChar
628             << "  |                  |" << SymbolSizeStr << "|     |\n";
629    }
630  }
631
632  SymbolList.clear();
633}
634
635template <class ELFT>
636static char getSymbolNMTypeChar(ELFObjectFile<ELFT> &Obj,
637                                basic_symbol_iterator I) {
638  typedef typename ELFObjectFile<ELFT>::Elf_Sym Elf_Sym;
639  typedef typename ELFObjectFile<ELFT>::Elf_Shdr Elf_Shdr;
640
641  // OK, this is ELF
642  symbol_iterator SymI(I);
643
644  DataRefImpl Symb = I->getRawDataRefImpl();
645  const Elf_Sym *ESym = Obj.getSymbol(Symb);
646  const ELFFile<ELFT> &EF = *Obj.getELFFile();
647  const Elf_Shdr *ESec = EF.getSection(ESym);
648
649  if (ESec) {
650    switch (ESec->sh_type) {
651    case ELF::SHT_PROGBITS:
652    case ELF::SHT_DYNAMIC:
653      switch (ESec->sh_flags) {
654      case (ELF::SHF_ALLOC | ELF::SHF_EXECINSTR):
655        return 't';
656      case (ELF::SHF_TLS | ELF::SHF_ALLOC | ELF::SHF_WRITE):
657      case (ELF::SHF_ALLOC | ELF::SHF_WRITE):
658        return 'd';
659      case ELF::SHF_ALLOC:
660      case (ELF::SHF_ALLOC | ELF::SHF_MERGE):
661      case (ELF::SHF_ALLOC | ELF::SHF_MERGE | ELF::SHF_STRINGS):
662        return 'r';
663      }
664      break;
665    case ELF::SHT_NOBITS:
666      return 'b';
667    }
668  }
669
670  if (ESym->getType() == ELF::STT_SECTION) {
671    StringRef Name;
672    if (error(SymI->getName(Name)))
673      return '?';
674    return StringSwitch<char>(Name)
675        .StartsWith(".debug", 'N')
676        .StartsWith(".note", 'n')
677        .Default('?');
678  }
679
680  return '?';
681}
682
683static char getSymbolNMTypeChar(COFFObjectFile &Obj, symbol_iterator I) {
684  COFFSymbolRef Symb = Obj.getCOFFSymbol(*I);
685  // OK, this is COFF.
686  symbol_iterator SymI(I);
687
688  StringRef Name;
689  if (error(SymI->getName(Name)))
690    return '?';
691
692  char Ret = StringSwitch<char>(Name)
693                 .StartsWith(".debug", 'N')
694                 .StartsWith(".sxdata", 'N')
695                 .Default('?');
696
697  if (Ret != '?')
698    return Ret;
699
700  uint32_t Characteristics = 0;
701  if (!COFF::isReservedSectionNumber(Symb.getSectionNumber())) {
702    section_iterator SecI = Obj.section_end();
703    if (error(SymI->getSection(SecI)))
704      return '?';
705    const coff_section *Section = Obj.getCOFFSection(*SecI);
706    Characteristics = Section->Characteristics;
707  }
708
709  switch (Symb.getSectionNumber()) {
710  case COFF::IMAGE_SYM_DEBUG:
711    return 'n';
712  default:
713    // Check section type.
714    if (Characteristics & COFF::IMAGE_SCN_CNT_CODE)
715      return 't';
716    if (Characteristics & COFF::IMAGE_SCN_CNT_INITIALIZED_DATA)
717      return Characteristics & COFF::IMAGE_SCN_MEM_WRITE ? 'd' : 'r';
718    if (Characteristics & COFF::IMAGE_SCN_CNT_UNINITIALIZED_DATA)
719      return 'b';
720    if (Characteristics & COFF::IMAGE_SCN_LNK_INFO)
721      return 'i';
722    // Check for section symbol.
723    if (Symb.isSectionDefinition())
724      return 's';
725  }
726
727  return '?';
728}
729
730static uint8_t getNType(MachOObjectFile &Obj, DataRefImpl Symb) {
731  if (Obj.is64Bit()) {
732    MachO::nlist_64 STE = Obj.getSymbol64TableEntry(Symb);
733    return STE.n_type;
734  }
735  MachO::nlist STE = Obj.getSymbolTableEntry(Symb);
736  return STE.n_type;
737}
738
739static char getSymbolNMTypeChar(MachOObjectFile &Obj, basic_symbol_iterator I) {
740  DataRefImpl Symb = I->getRawDataRefImpl();
741  uint8_t NType = getNType(Obj, Symb);
742
743  if (NType & MachO::N_STAB)
744    return '-';
745
746  switch (NType & MachO::N_TYPE) {
747  case MachO::N_ABS:
748    return 's';
749  case MachO::N_INDR:
750    return 'i';
751  case MachO::N_SECT: {
752    section_iterator Sec = Obj.section_end();
753    Obj.getSymbolSection(Symb, Sec);
754    DataRefImpl Ref = Sec->getRawDataRefImpl();
755    StringRef SectionName;
756    Obj.getSectionName(Ref, SectionName);
757    StringRef SegmentName = Obj.getSectionFinalSegmentName(Ref);
758    if (SegmentName == "__TEXT" && SectionName == "__text")
759      return 't';
760    else if (SegmentName == "__DATA" && SectionName == "__data")
761      return 'd';
762    else if (SegmentName == "__DATA" && SectionName == "__bss")
763      return 'b';
764    else
765      return 's';
766  }
767  }
768
769  return '?';
770}
771
772static char getSymbolNMTypeChar(const GlobalValue &GV) {
773  if (GV.getType()->getElementType()->isFunctionTy())
774    return 't';
775  // FIXME: should we print 'b'? At the IR level we cannot be sure if this
776  // will be in bss or not, but we could approximate.
777  return 'd';
778}
779
780static char getSymbolNMTypeChar(IRObjectFile &Obj, basic_symbol_iterator I) {
781  const GlobalValue *GV = Obj.getSymbolGV(I->getRawDataRefImpl());
782  if (!GV)
783    return 't';
784  return getSymbolNMTypeChar(*GV);
785}
786
787template <class ELFT>
788static bool isELFObject(ELFObjectFile<ELFT> &Obj, symbol_iterator I) {
789  typedef typename ELFObjectFile<ELFT>::Elf_Sym Elf_Sym;
790
791  DataRefImpl Symb = I->getRawDataRefImpl();
792  const Elf_Sym *ESym = Obj.getSymbol(Symb);
793
794  return ESym->getType() == ELF::STT_OBJECT;
795}
796
797static bool isObject(SymbolicFile &Obj, basic_symbol_iterator I) {
798  if (ELF32LEObjectFile *ELF = dyn_cast<ELF32LEObjectFile>(&Obj))
799    return isELFObject(*ELF, I);
800  if (ELF64LEObjectFile *ELF = dyn_cast<ELF64LEObjectFile>(&Obj))
801    return isELFObject(*ELF, I);
802  if (ELF32BEObjectFile *ELF = dyn_cast<ELF32BEObjectFile>(&Obj))
803    return isELFObject(*ELF, I);
804  if (ELF64BEObjectFile *ELF = dyn_cast<ELF64BEObjectFile>(&Obj))
805    return isELFObject(*ELF, I);
806  return false;
807}
808
809static char getNMTypeChar(SymbolicFile &Obj, basic_symbol_iterator I) {
810  uint32_t Symflags = I->getFlags();
811  if ((Symflags & object::SymbolRef::SF_Weak) && !isa<MachOObjectFile>(Obj)) {
812    char Ret = isObject(Obj, I) ? 'v' : 'w';
813    if (!(Symflags & object::SymbolRef::SF_Undefined))
814      Ret = toupper(Ret);
815    return Ret;
816  }
817
818  if (Symflags & object::SymbolRef::SF_Undefined)
819    return 'U';
820
821  if (Symflags & object::SymbolRef::SF_Common)
822    return 'C';
823
824  char Ret = '?';
825  if (Symflags & object::SymbolRef::SF_Absolute)
826    Ret = 'a';
827  else if (IRObjectFile *IR = dyn_cast<IRObjectFile>(&Obj))
828    Ret = getSymbolNMTypeChar(*IR, I);
829  else if (COFFObjectFile *COFF = dyn_cast<COFFObjectFile>(&Obj))
830    Ret = getSymbolNMTypeChar(*COFF, I);
831  else if (MachOObjectFile *MachO = dyn_cast<MachOObjectFile>(&Obj))
832    Ret = getSymbolNMTypeChar(*MachO, I);
833  else if (ELF32LEObjectFile *ELF = dyn_cast<ELF32LEObjectFile>(&Obj))
834    Ret = getSymbolNMTypeChar(*ELF, I);
835  else if (ELF64LEObjectFile *ELF = dyn_cast<ELF64LEObjectFile>(&Obj))
836    Ret = getSymbolNMTypeChar(*ELF, I);
837  else if (ELF32BEObjectFile *ELF = dyn_cast<ELF32BEObjectFile>(&Obj))
838    Ret = getSymbolNMTypeChar(*ELF, I);
839  else
840    Ret = getSymbolNMTypeChar(cast<ELF64BEObjectFile>(Obj), I);
841
842  if (Symflags & object::SymbolRef::SF_Global)
843    Ret = toupper(Ret);
844
845  return Ret;
846}
847
848// getNsectForSegSect() is used to implement the Mach-O "-s segname sectname"
849// option to dump only those symbols from that section in a Mach-O file.
850// It is called once for each Mach-O file from dumpSymbolNamesFromObject()
851// to get the section number for that named section from the command line
852// arguments. It returns the section number for that section in the Mach-O
853// file or zero it is not present.
854static unsigned getNsectForSegSect(MachOObjectFile *Obj) {
855  unsigned Nsect = 1;
856  for (section_iterator I = Obj->section_begin(), E = Obj->section_end();
857       I != E; ++I) {
858    DataRefImpl Ref = I->getRawDataRefImpl();
859    StringRef SectionName;
860    Obj->getSectionName(Ref, SectionName);
861    StringRef SegmentName = Obj->getSectionFinalSegmentName(Ref);
862    if (SegmentName == SegSect[0] && SectionName == SegSect[1])
863      return Nsect;
864    Nsect++;
865  }
866  return 0;
867}
868
869// getNsectInMachO() is used to implement the Mach-O "-s segname sectname"
870// option to dump only those symbols from that section in a Mach-O file.
871// It is called once for each symbol in a Mach-O file from
872// dumpSymbolNamesFromObject() and returns the section number for that symbol
873// if it is in a section, else it returns 0.
874static unsigned getNsectInMachO(MachOObjectFile &Obj, basic_symbol_iterator I) {
875  DataRefImpl Symb = I->getRawDataRefImpl();
876  if (Obj.is64Bit()) {
877    MachO::nlist_64 STE = Obj.getSymbol64TableEntry(Symb);
878    if ((STE.n_type & MachO::N_TYPE) == MachO::N_SECT)
879      return STE.n_sect;
880    return 0;
881  }
882  MachO::nlist STE = Obj.getSymbolTableEntry(Symb);
883  if ((STE.n_type & MachO::N_TYPE) == MachO::N_SECT)
884    return STE.n_sect;
885  return 0;
886}
887
888static void dumpSymbolNamesFromObject(SymbolicFile &Obj, bool printName,
889                                      std::string ArchiveName = std::string(),
890                                      std::string ArchitectureName =
891                                        std::string()) {
892  basic_symbol_iterator IBegin = Obj.symbol_begin();
893  basic_symbol_iterator IEnd = Obj.symbol_end();
894  if (DynamicSyms) {
895    if (!Obj.isELF()) {
896      error("File format has no dynamic symbol table", Obj.getFileName());
897      return;
898    }
899    std::pair<symbol_iterator, symbol_iterator> IDyn =
900        getELFDynamicSymbolIterators(&Obj);
901    IBegin = IDyn.first;
902    IEnd = IDyn.second;
903  }
904  std::string NameBuffer;
905  raw_string_ostream OS(NameBuffer);
906  // If a "-s segname sectname" option was specified and this is a Mach-O
907  // file get the section number for that section in this object file.
908  unsigned int Nsect = 0;
909  MachOObjectFile *MachO = dyn_cast<MachOObjectFile>(&Obj);
910  if (SegSect.size() != 0 && MachO) {
911    Nsect = getNsectForSegSect(MachO);
912    // If this section is not in the object file no symbols are printed.
913    if (Nsect == 0)
914      return;
915  }
916  for (basic_symbol_iterator I = IBegin; I != IEnd; ++I) {
917    uint32_t SymFlags = I->getFlags();
918    if (!DebugSyms && (SymFlags & SymbolRef::SF_FormatSpecific))
919      continue;
920    if (WithoutAliases) {
921      if (IRObjectFile *IR = dyn_cast<IRObjectFile>(&Obj)) {
922        const GlobalValue *GV = IR->getSymbolGV(I->getRawDataRefImpl());
923        if (GV && isa<GlobalAlias>(GV))
924          continue;
925      }
926    }
927    // If a "-s segname sectname" option was specified and this is a Mach-O
928    // file and this section appears in this file, Nsect will be non-zero then
929    // see if this symbol is a symbol from that section and if not skip it.
930    if (Nsect && Nsect != getNsectInMachO(*MachO, I))
931      continue;
932    NMSymbol S;
933    S.Size = UnknownAddressOrSize;
934    S.Address = UnknownAddressOrSize;
935    if ((PrintSize || SizeSort) && isa<ObjectFile>(Obj)) {
936      symbol_iterator SymI = I;
937      if (error(SymI->getSize(S.Size)))
938        break;
939    }
940    if (PrintAddress && isa<ObjectFile>(Obj))
941      if (error(symbol_iterator(I)->getAddress(S.Address)))
942        break;
943    S.TypeChar = getNMTypeChar(Obj, I);
944    if (error(I->printName(OS)))
945      break;
946    OS << '\0';
947    S.Symb = I->getRawDataRefImpl();
948    SymbolList.push_back(S);
949  }
950
951  OS.flush();
952  const char *P = NameBuffer.c_str();
953  for (unsigned I = 0; I < SymbolList.size(); ++I) {
954    SymbolList[I].Name = P;
955    P += strlen(P) + 1;
956  }
957
958  CurrentFilename = Obj.getFileName();
959  sortAndPrintSymbolList(Obj, printName, ArchiveName, ArchitectureName);
960}
961
962// checkMachOAndArchFlags() checks to see if the SymbolicFile is a Mach-O file
963// and if it is and there is a list of architecture flags is specified then
964// check to make sure this Mach-O file is one of those architectures or all
965// architectures was specificed.  If not then an error is generated and this
966// routine returns false.  Else it returns true.
967static bool checkMachOAndArchFlags(SymbolicFile *O, std::string &Filename) {
968  MachOObjectFile *MachO = dyn_cast<MachOObjectFile>(O);
969
970  if (!MachO || ArchAll || ArchFlags.size() == 0)
971    return true;
972
973  MachO::mach_header H;
974  MachO::mach_header_64 H_64;
975  Triple T;
976  if (MachO->is64Bit()) {
977    H_64 = MachO->MachOObjectFile::getHeader64();
978    T = MachOObjectFile::getArch(H_64.cputype, H_64.cpusubtype);
979  } else {
980    H = MachO->MachOObjectFile::getHeader();
981    T = MachOObjectFile::getArch(H.cputype, H.cpusubtype);
982  }
983  if (std::none_of(
984          ArchFlags.begin(), ArchFlags.end(),
985          [&](const std::string &Name) { return Name == T.getArchName(); })) {
986    error("No architecture specified", Filename);
987    return false;
988  }
989  return true;
990}
991
992static void dumpSymbolNamesFromFile(std::string &Filename) {
993  ErrorOr<std::unique_ptr<MemoryBuffer>> BufferOrErr =
994      MemoryBuffer::getFileOrSTDIN(Filename);
995  if (error(BufferOrErr.getError(), Filename))
996    return;
997
998  LLVMContext &Context = getGlobalContext();
999  ErrorOr<std::unique_ptr<Binary>> BinaryOrErr = createBinary(
1000      BufferOrErr.get()->getMemBufferRef(), NoLLVMBitcode ? nullptr : &Context);
1001  if (error(BinaryOrErr.getError(), Filename))
1002    return;
1003  Binary &Bin = *BinaryOrErr.get();
1004
1005  if (Archive *A = dyn_cast<Archive>(&Bin)) {
1006    if (ArchiveMap) {
1007      Archive::symbol_iterator I = A->symbol_begin();
1008      Archive::symbol_iterator E = A->symbol_end();
1009      if (I != E) {
1010        outs() << "Archive map\n";
1011        for (; I != E; ++I) {
1012          ErrorOr<Archive::child_iterator> C = I->getMember();
1013          if (error(C.getError()))
1014            return;
1015          ErrorOr<StringRef> FileNameOrErr = C.get()->getName();
1016          if (error(FileNameOrErr.getError()))
1017            return;
1018          StringRef SymName = I->getName();
1019          outs() << SymName << " in " << FileNameOrErr.get() << "\n";
1020        }
1021        outs() << "\n";
1022      }
1023    }
1024
1025    for (Archive::child_iterator I = A->child_begin(), E = A->child_end();
1026         I != E; ++I) {
1027      ErrorOr<std::unique_ptr<Binary>> ChildOrErr = I->getAsBinary(&Context);
1028      if (ChildOrErr.getError())
1029        continue;
1030      if (SymbolicFile *O = dyn_cast<SymbolicFile>(&*ChildOrErr.get())) {
1031        if (!checkMachOAndArchFlags(O, Filename))
1032          return;
1033        if (!PrintFileName) {
1034          outs() << "\n";
1035          if (isa<MachOObjectFile>(O)) {
1036            outs() << Filename << "(" << O->getFileName() << ")";
1037          } else
1038            outs() << O->getFileName();
1039          outs() << ":\n";
1040        }
1041        dumpSymbolNamesFromObject(*O, false, Filename);
1042      }
1043    }
1044    return;
1045  }
1046  if (MachOUniversalBinary *UB = dyn_cast<MachOUniversalBinary>(&Bin)) {
1047    // If we have a list of architecture flags specified dump only those.
1048    if (!ArchAll && ArchFlags.size() != 0) {
1049      // Look for a slice in the universal binary that matches each ArchFlag.
1050      bool ArchFound;
1051      for (unsigned i = 0; i < ArchFlags.size(); ++i) {
1052        ArchFound = false;
1053        for (MachOUniversalBinary::object_iterator I = UB->begin_objects(),
1054                                                   E = UB->end_objects();
1055             I != E; ++I) {
1056          if (ArchFlags[i] == I->getArchTypeName()) {
1057            ArchFound = true;
1058            ErrorOr<std::unique_ptr<ObjectFile>> ObjOrErr =
1059                I->getAsObjectFile();
1060            std::string ArchiveName;
1061            std::string ArchitectureName;
1062            ArchiveName.clear();
1063            ArchitectureName.clear();
1064            if (ObjOrErr) {
1065              ObjectFile &Obj = *ObjOrErr.get();
1066              if (ArchFlags.size() > 1) {
1067                if (PrintFileName)
1068                  ArchitectureName = I->getArchTypeName();
1069                else
1070                  outs() << "\n" << Obj.getFileName() << " (for architecture "
1071                         << I->getArchTypeName() << ")"
1072                         << ":\n";
1073              }
1074              dumpSymbolNamesFromObject(Obj, false, ArchiveName,
1075                                        ArchitectureName);
1076            } else if (ErrorOr<std::unique_ptr<Archive>> AOrErr =
1077                           I->getAsArchive()) {
1078              std::unique_ptr<Archive> &A = *AOrErr;
1079              for (Archive::child_iterator AI = A->child_begin(),
1080                                           AE = A->child_end();
1081                   AI != AE; ++AI) {
1082                ErrorOr<std::unique_ptr<Binary>> ChildOrErr =
1083                    AI->getAsBinary(&Context);
1084                if (ChildOrErr.getError())
1085                  continue;
1086                if (SymbolicFile *O =
1087                        dyn_cast<SymbolicFile>(&*ChildOrErr.get())) {
1088                  if (PrintFileName) {
1089                    ArchiveName = A->getFileName();
1090                    if (ArchFlags.size() > 1)
1091                      ArchitectureName = I->getArchTypeName();
1092                  } else {
1093                    outs() << "\n" << A->getFileName();
1094                    outs() << "(" << O->getFileName() << ")";
1095                    if (ArchFlags.size() > 1) {
1096                      outs() << " (for architecture " << I->getArchTypeName()
1097                             << ")";
1098                    }
1099                    outs() << ":\n";
1100                  }
1101                  dumpSymbolNamesFromObject(*O, false, ArchiveName,
1102                                            ArchitectureName);
1103                }
1104              }
1105            }
1106          }
1107        }
1108        if (!ArchFound) {
1109          error(ArchFlags[i],
1110                "file: " + Filename + " does not contain architecture");
1111          return;
1112        }
1113      }
1114      return;
1115    }
1116    // No architecture flags were specified so if this contains a slice that
1117    // matches the host architecture dump only that.
1118    if (!ArchAll) {
1119      StringRef HostArchName = MachOObjectFile::getHostArch().getArchName();
1120      for (MachOUniversalBinary::object_iterator I = UB->begin_objects(),
1121                                                 E = UB->end_objects();
1122           I != E; ++I) {
1123        if (HostArchName == I->getArchTypeName()) {
1124          ErrorOr<std::unique_ptr<ObjectFile>> ObjOrErr = I->getAsObjectFile();
1125          std::string ArchiveName;
1126          ArchiveName.clear();
1127          if (ObjOrErr) {
1128            ObjectFile &Obj = *ObjOrErr.get();
1129            dumpSymbolNamesFromObject(Obj, false);
1130          } else if (ErrorOr<std::unique_ptr<Archive>> AOrErr =
1131                         I->getAsArchive()) {
1132            std::unique_ptr<Archive> &A = *AOrErr;
1133            for (Archive::child_iterator AI = A->child_begin(),
1134                                         AE = A->child_end();
1135                 AI != AE; ++AI) {
1136              ErrorOr<std::unique_ptr<Binary>> ChildOrErr =
1137                  AI->getAsBinary(&Context);
1138              if (ChildOrErr.getError())
1139                continue;
1140              if (SymbolicFile *O =
1141                      dyn_cast<SymbolicFile>(&*ChildOrErr.get())) {
1142                if (PrintFileName)
1143                  ArchiveName = A->getFileName();
1144                else
1145                  outs() << "\n" << A->getFileName() << "(" << O->getFileName()
1146                         << ")"
1147                         << ":\n";
1148                dumpSymbolNamesFromObject(*O, false, ArchiveName);
1149              }
1150            }
1151          }
1152          return;
1153        }
1154      }
1155    }
1156    // Either all architectures have been specified or none have been specified
1157    // and this does not contain the host architecture so dump all the slices.
1158    bool moreThanOneArch = UB->getNumberOfObjects() > 1;
1159    for (MachOUniversalBinary::object_iterator I = UB->begin_objects(),
1160                                               E = UB->end_objects();
1161         I != E; ++I) {
1162      ErrorOr<std::unique_ptr<ObjectFile>> ObjOrErr = I->getAsObjectFile();
1163      std::string ArchiveName;
1164      std::string ArchitectureName;
1165      ArchiveName.clear();
1166      ArchitectureName.clear();
1167      if (ObjOrErr) {
1168        ObjectFile &Obj = *ObjOrErr.get();
1169        if (PrintFileName) {
1170          if (isa<MachOObjectFile>(Obj) && moreThanOneArch)
1171            ArchitectureName = I->getArchTypeName();
1172        } else {
1173          if (moreThanOneArch)
1174            outs() << "\n";
1175          outs() << Obj.getFileName();
1176          if (isa<MachOObjectFile>(Obj) && moreThanOneArch)
1177            outs() << " (for architecture " << I->getArchTypeName() << ")";
1178          outs() << ":\n";
1179        }
1180        dumpSymbolNamesFromObject(Obj, false, ArchiveName, ArchitectureName);
1181      } else if (ErrorOr<std::unique_ptr<Archive>> AOrErr = I->getAsArchive()) {
1182        std::unique_ptr<Archive> &A = *AOrErr;
1183        for (Archive::child_iterator AI = A->child_begin(), AE = A->child_end();
1184             AI != AE; ++AI) {
1185          ErrorOr<std::unique_ptr<Binary>> ChildOrErr =
1186              AI->getAsBinary(&Context);
1187          if (ChildOrErr.getError())
1188            continue;
1189          if (SymbolicFile *O = dyn_cast<SymbolicFile>(&*ChildOrErr.get())) {
1190            if (PrintFileName) {
1191              ArchiveName = A->getFileName();
1192              if (isa<MachOObjectFile>(O) && moreThanOneArch)
1193                ArchitectureName = I->getArchTypeName();
1194            } else {
1195              outs() << "\n" << A->getFileName();
1196              if (isa<MachOObjectFile>(O)) {
1197                outs() << "(" << O->getFileName() << ")";
1198                if (moreThanOneArch)
1199                  outs() << " (for architecture " << I->getArchTypeName()
1200                         << ")";
1201              } else
1202                outs() << ":" << O->getFileName();
1203              outs() << ":\n";
1204            }
1205            dumpSymbolNamesFromObject(*O, false, ArchiveName, ArchitectureName);
1206          }
1207        }
1208      }
1209    }
1210    return;
1211  }
1212  if (SymbolicFile *O = dyn_cast<SymbolicFile>(&Bin)) {
1213    if (!checkMachOAndArchFlags(O, Filename))
1214      return;
1215    dumpSymbolNamesFromObject(*O, true);
1216    return;
1217  }
1218  error("unrecognizable file type", Filename);
1219  return;
1220}
1221
1222int main(int argc, char **argv) {
1223  // Print a stack trace if we signal out.
1224  sys::PrintStackTraceOnErrorSignal();
1225  PrettyStackTraceProgram X(argc, argv);
1226
1227  llvm_shutdown_obj Y; // Call llvm_shutdown() on exit.
1228  cl::ParseCommandLineOptions(argc, argv, "llvm symbol table dumper\n");
1229
1230  // llvm-nm only reads binary files.
1231  if (error(sys::ChangeStdinToBinary()))
1232    return 1;
1233
1234  llvm::InitializeAllTargetInfos();
1235  llvm::InitializeAllTargetMCs();
1236  llvm::InitializeAllAsmParsers();
1237
1238  ToolName = argv[0];
1239  if (BSDFormat)
1240    OutputFormat = bsd;
1241  if (POSIXFormat)
1242    OutputFormat = posix;
1243  if (DarwinFormat)
1244    OutputFormat = darwin;
1245
1246  // The relative order of these is important. If you pass --size-sort it should
1247  // only print out the size. However, if you pass -S --size-sort, it should
1248  // print out both the size and address.
1249  if (SizeSort && !PrintSize)
1250    PrintAddress = false;
1251  if (OutputFormat == sysv || SizeSort)
1252    PrintSize = true;
1253
1254  switch (InputFilenames.size()) {
1255  case 0:
1256    InputFilenames.push_back("a.out");
1257  case 1:
1258    break;
1259  default:
1260    MultipleFiles = true;
1261  }
1262
1263  for (unsigned i = 0; i < ArchFlags.size(); ++i) {
1264    if (ArchFlags[i] == "all") {
1265      ArchAll = true;
1266    } else {
1267      if (!MachOObjectFile::isValidArch(ArchFlags[i]))
1268        error("Unknown architecture named '" + ArchFlags[i] + "'",
1269              "for the -arch option");
1270    }
1271  }
1272
1273  if (SegSect.size() != 0 && SegSect.size() != 2)
1274    error("bad number of arguments (must be two arguments)",
1275          "for the -s option");
1276
1277  std::for_each(InputFilenames.begin(), InputFilenames.end(),
1278                dumpSymbolNamesFromFile);
1279
1280  if (HadError)
1281    return 1;
1282
1283  return 0;
1284}
1285