1 //===-- llvm-nm.cpp - Symbol table dumping utility for llvm ---------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
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.
14 // This "nm" supports many of the features of GNU "nm", including its different
17 //===----------------------------------------------------------------------===//
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/raw_ostream.h"
44 #include <system_error>
47 using namespace object;
50 enum OutputFormatTy { bsd, sysv, posix, darwin };
51 cl::opt<OutputFormatTy> OutputFormat(
52 "format", cl::desc("Specify output format"),
53 cl::values(clEnumVal(bsd, "BSD format"), clEnumVal(sysv, "System V format"),
54 clEnumVal(posix, "POSIX.2 format"),
55 clEnumVal(darwin, "Darwin -m format"), clEnumValEnd),
57 cl::alias OutputFormat2("f", cl::desc("Alias for --format"),
58 cl::aliasopt(OutputFormat));
60 cl::list<std::string> InputFilenames(cl::Positional, cl::desc("<input files>"),
63 cl::opt<bool> UndefinedOnly("undefined-only",
64 cl::desc("Show only undefined symbols"));
65 cl::alias UndefinedOnly2("u", cl::desc("Alias for --undefined-only"),
66 cl::aliasopt(UndefinedOnly));
68 cl::opt<bool> DynamicSyms("dynamic",
69 cl::desc("Display the dynamic symbols instead "
70 "of normal symbols."));
71 cl::alias DynamicSyms2("D", cl::desc("Alias for --dynamic"),
72 cl::aliasopt(DynamicSyms));
74 cl::opt<bool> DefinedOnly("defined-only",
75 cl::desc("Show only defined symbols"));
77 cl::opt<bool> ExternalOnly("extern-only",
78 cl::desc("Show only external symbols"));
79 cl::alias ExternalOnly2("g", cl::desc("Alias for --extern-only"),
80 cl::aliasopt(ExternalOnly));
82 cl::opt<bool> BSDFormat("B", cl::desc("Alias for --format=bsd"));
83 cl::opt<bool> POSIXFormat("P", cl::desc("Alias for --format=posix"));
84 cl::opt<bool> DarwinFormat("m", cl::desc("Alias for --format=darwin"));
86 static cl::list<std::string> ArchFlags("arch",
87 cl::desc("architecture(s) from a Mach-O file to dump"),
91 cl::opt<bool> PrintFileName(
93 cl::desc("Precede each symbol with the object file it came from"));
95 cl::alias PrintFileNameA("A", cl::desc("Alias for --print-file-name"),
96 cl::aliasopt(PrintFileName));
97 cl::alias PrintFileNameo("o", cl::desc("Alias for --print-file-name"),
98 cl::aliasopt(PrintFileName));
100 cl::opt<bool> DebugSyms("debug-syms",
101 cl::desc("Show all symbols, even debugger only"));
102 cl::alias DebugSymsa("a", cl::desc("Alias for --debug-syms"),
103 cl::aliasopt(DebugSyms));
105 cl::opt<bool> NumericSort("numeric-sort", cl::desc("Sort symbols by address"));
106 cl::alias NumericSortn("n", cl::desc("Alias for --numeric-sort"),
107 cl::aliasopt(NumericSort));
108 cl::alias NumericSortv("v", cl::desc("Alias for --numeric-sort"),
109 cl::aliasopt(NumericSort));
111 cl::opt<bool> NoSort("no-sort", cl::desc("Show symbols in order encountered"));
112 cl::alias NoSortp("p", cl::desc("Alias for --no-sort"), cl::aliasopt(NoSort));
114 cl::opt<bool> PrintSize("print-size",
115 cl::desc("Show symbol size instead of address"));
116 cl::alias PrintSizeS("S", cl::desc("Alias for --print-size"),
117 cl::aliasopt(PrintSize));
119 cl::opt<bool> SizeSort("size-sort", cl::desc("Sort symbols by size"));
121 cl::opt<bool> WithoutAliases("without-aliases", cl::Hidden,
122 cl::desc("Exclude aliases from output"));
124 cl::opt<bool> ArchiveMap("print-armap", cl::desc("Print the archive map"));
125 cl::alias ArchiveMaps("s", cl::desc("Alias for --print-armap"),
126 cl::aliasopt(ArchiveMap));
127 bool PrintAddress = true;
129 bool MultipleFiles = false;
131 bool HadError = false;
133 std::string ToolName;
136 static void error(Twine Message, Twine Path = Twine()) {
138 errs() << ToolName << ": " << Path << ": " << Message << ".\n";
141 static bool error(std::error_code EC, Twine Path = Twine()) {
143 error(EC.message(), Path);
159 static bool compareSymbolAddress(const NMSymbol &A, const NMSymbol &B) {
160 if (A.Address < B.Address)
162 else if (A.Address == B.Address && A.Name < B.Name)
164 else if (A.Address == B.Address && A.Name == B.Name && A.Size < B.Size)
170 static bool compareSymbolSize(const NMSymbol &A, const NMSymbol &B) {
173 else if (A.Size == B.Size && A.Name < B.Name)
175 else if (A.Size == B.Size && A.Name == B.Name && A.Address < B.Address)
181 static bool compareSymbolName(const NMSymbol &A, const NMSymbol &B) {
184 else if (A.Name == B.Name && A.Size < B.Size)
186 else if (A.Name == B.Name && A.Size == B.Size && A.Address < B.Address)
192 static char isSymbolList64Bit(SymbolicFile *Obj) {
193 if (isa<IRObjectFile>(Obj))
195 else if (isa<COFFObjectFile>(Obj))
197 else if (MachOObjectFile *MachO = dyn_cast<MachOObjectFile>(Obj))
198 return MachO->is64Bit();
199 else if (isa<ELF32LEObjectFile>(Obj))
201 else if (isa<ELF64LEObjectFile>(Obj))
203 else if (isa<ELF32BEObjectFile>(Obj))
205 else if(isa<ELF64BEObjectFile>(Obj))
211 static StringRef CurrentFilename;
212 typedef std::vector<NMSymbol> SymbolListT;
213 static SymbolListT SymbolList;
215 // darwinPrintSymbol() is used to print a symbol from a Mach-O file when the
216 // the OutputFormat is darwin. It produces the same output as darwin's nm(1) -m
218 static void darwinPrintSymbol(MachOObjectFile *MachO, SymbolListT::iterator I,
219 char *SymbolAddrStr, const char *printBlanks) {
220 MachO::mach_header H;
221 MachO::mach_header_64 H_64;
222 uint32_t Filetype, Flags;
223 MachO::nlist_64 STE_64;
228 if (MachO->is64Bit()) {
229 H_64 = MachO->MachOObjectFile::getHeader64();
230 Filetype = H_64.filetype;
232 STE_64 = MachO->getSymbol64TableEntry(I->Symb);
233 NType = STE_64.n_type;
234 NDesc = STE_64.n_desc;
235 NValue = STE_64.n_value;
237 H = MachO->MachOObjectFile::getHeader();
238 Filetype = H.filetype;
240 STE = MachO->getSymbolTableEntry(I->Symb);
243 NValue = STE.n_value;
247 if ((NType & MachO::N_TYPE) == MachO::N_INDR)
248 strcpy(SymbolAddrStr, printBlanks);
249 outs() << SymbolAddrStr << ' ';
252 switch (NType & MachO::N_TYPE) {
255 outs() << "(common) ";
256 if (MachO::GET_COMM_ALIGN(NDesc) != 0)
257 outs() << "(alignment 2^" <<
258 (int)MachO::GET_COMM_ALIGN(NDesc) << ") ";
260 if ((NType & MachO::N_TYPE) == MachO::N_PBUD)
261 outs() << "(prebound ";
264 if ((NDesc & MachO::REFERENCE_TYPE) ==
265 MachO::REFERENCE_FLAG_UNDEFINED_LAZY)
266 outs() << "undefined [lazy bound]) ";
267 else if ((NDesc & MachO::REFERENCE_TYPE) ==
268 MachO::REFERENCE_FLAG_UNDEFINED_LAZY)
269 outs() << "undefined [private lazy bound]) ";
270 else if ((NDesc & MachO::REFERENCE_TYPE) ==
271 MachO::REFERENCE_FLAG_PRIVATE_UNDEFINED_NON_LAZY)
272 outs() << "undefined [private]) ";
274 outs() << "undefined) ";
278 outs() << "(absolute) ";
281 outs() << "(indirect) ";
283 case MachO::N_SECT: {
284 section_iterator Sec = MachO->section_end();
285 MachO->getSymbolSection(I->Symb, Sec);
286 DataRefImpl Ref = Sec->getRawDataRefImpl();
287 StringRef SectionName;
288 MachO->getSectionName(Ref, SectionName);
289 StringRef SegmentName = MachO->getSectionFinalSegmentName(Ref);
290 outs() << "(" << SegmentName << "," << SectionName << ") ";
298 if (NType & MachO::N_EXT) {
299 if (NDesc & MachO::REFERENCED_DYNAMICALLY)
300 outs() << "[referenced dynamically] ";
301 if (NType & MachO::N_PEXT) {
302 if ((NDesc & MachO::N_WEAK_DEF) == MachO::N_WEAK_DEF)
303 outs() << "weak private external ";
305 outs() << "private external ";
307 if ((NDesc & MachO::N_WEAK_REF) == MachO::N_WEAK_REF ||
308 (NDesc & MachO::N_WEAK_DEF) == MachO::N_WEAK_DEF){
309 if ((NDesc & (MachO::N_WEAK_REF | MachO::N_WEAK_DEF)) ==
310 (MachO::N_WEAK_REF | MachO::N_WEAK_DEF))
311 outs() << "weak external automatically hidden ";
313 outs() << "weak external ";
316 outs() << "external ";
319 if (NType & MachO::N_PEXT)
320 outs() << "non-external (was a private external) ";
322 outs() << "non-external ";
325 if (Filetype == MachO::MH_OBJECT &&
326 (NDesc & MachO::N_NO_DEAD_STRIP) == MachO::N_NO_DEAD_STRIP)
327 outs() << "[no dead strip] ";
329 if (Filetype == MachO::MH_OBJECT &&
330 ((NType & MachO::N_TYPE) != MachO::N_UNDF) &&
331 (NDesc & MachO::N_SYMBOL_RESOLVER) == MachO::N_SYMBOL_RESOLVER)
332 outs() << "[symbol resolver] ";
334 if (Filetype == MachO::MH_OBJECT &&
335 ((NType & MachO::N_TYPE) != MachO::N_UNDF) &&
336 (NDesc & MachO::N_ALT_ENTRY) == MachO::N_ALT_ENTRY)
337 outs() << "[alt entry] ";
339 if ((NDesc & MachO::N_ARM_THUMB_DEF) == MachO::N_ARM_THUMB_DEF)
340 outs() << "[Thumb] ";
342 if ((NType & MachO::N_TYPE) == MachO::N_INDR) {
343 outs() << I->Name << " (for ";
344 StringRef IndirectName;
345 if (MachO->getIndirectName(I->Symb, IndirectName))
348 outs() << IndirectName << ")";
353 if ((Flags & MachO::MH_TWOLEVEL) == MachO::MH_TWOLEVEL &&
354 (((NType & MachO::N_TYPE) == MachO::N_UNDF &&
356 (NType & MachO::N_TYPE) == MachO::N_PBUD)) {
357 uint32_t LibraryOrdinal = MachO::GET_LIBRARY_ORDINAL(NDesc);
358 if (LibraryOrdinal != 0) {
359 if (LibraryOrdinal == MachO::EXECUTABLE_ORDINAL)
360 outs() << " (from executable)";
361 else if (LibraryOrdinal == MachO::DYNAMIC_LOOKUP_ORDINAL)
362 outs() << " (dynamically looked up)";
364 StringRef LibraryName;
365 if (MachO->getLibraryShortNameByIndex(LibraryOrdinal - 1,
367 outs() << " (from bad library ordinal " <<
368 LibraryOrdinal << ")";
370 outs() << " (from " << LibraryName << ")";
378 static void sortAndPrintSymbolList(SymbolicFile *Obj, bool printName) {
381 std::sort(SymbolList.begin(), SymbolList.end(), compareSymbolAddress);
383 std::sort(SymbolList.begin(), SymbolList.end(), compareSymbolSize);
385 std::sort(SymbolList.begin(), SymbolList.end(), compareSymbolName);
388 if (OutputFormat == posix && MultipleFiles && printName) {
389 outs() << '\n' << CurrentFilename << ":\n";
390 } else if (OutputFormat == bsd && MultipleFiles && printName) {
391 outs() << "\n" << CurrentFilename << ":\n";
392 } else if (OutputFormat == sysv) {
393 outs() << "\n\nSymbols from " << CurrentFilename << ":\n\n"
394 << "Name Value Class Type"
395 << " Size Line Section\n";
398 const char *printBlanks, *printFormat;
399 if (isSymbolList64Bit(Obj)) {
401 printFormat = "%016" PRIx64;
404 printFormat = "%08" PRIx64;
407 for (SymbolListT::iterator I = SymbolList.begin(), E = SymbolList.end();
409 if ((I->TypeChar != 'U') && UndefinedOnly)
411 if ((I->TypeChar == 'U') && DefinedOnly)
413 if (SizeSort && !PrintAddress && I->Size == UnknownAddressOrSize)
416 char SymbolAddrStr[18] = "";
417 char SymbolSizeStr[18] = "";
419 if (OutputFormat == sysv || I->Address == UnknownAddressOrSize)
420 strcpy(SymbolAddrStr, printBlanks);
421 if (OutputFormat == sysv)
422 strcpy(SymbolSizeStr, printBlanks);
424 if (I->Address != UnknownAddressOrSize)
425 format(printFormat, I->Address)
426 .print(SymbolAddrStr, sizeof(SymbolAddrStr));
427 if (I->Size != UnknownAddressOrSize)
428 format(printFormat, I->Size).print(SymbolSizeStr, sizeof(SymbolSizeStr));
430 // If OutputFormat is darwin and we have a MachOObjectFile print as darwin's
431 // nm(1) -m output, else if OutputFormat is darwin and not a Mach-O object
432 // fall back to OutputFormat bsd (see below).
433 MachOObjectFile *MachO = dyn_cast<MachOObjectFile>(Obj);
434 if (OutputFormat == darwin && MachO) {
435 darwinPrintSymbol(MachO, I, SymbolAddrStr, printBlanks);
436 } else if (OutputFormat == posix) {
437 outs() << I->Name << " " << I->TypeChar << " " << SymbolAddrStr
438 << SymbolSizeStr << "\n";
439 } else if (OutputFormat == bsd || (OutputFormat == darwin && !MachO)) {
441 outs() << SymbolAddrStr << ' ';
443 outs() << SymbolSizeStr;
444 if (I->Size != UnknownAddressOrSize)
447 outs() << I->TypeChar << " " << I->Name << "\n";
448 } else if (OutputFormat == sysv) {
449 std::string PaddedName(I->Name);
450 while (PaddedName.length() < 20)
452 outs() << PaddedName << "|" << SymbolAddrStr << "| " << I->TypeChar
453 << " | |" << SymbolSizeStr << "| |\n";
460 template <class ELFT>
461 static char getSymbolNMTypeChar(ELFObjectFile<ELFT> &Obj,
462 basic_symbol_iterator I) {
463 typedef typename ELFObjectFile<ELFT>::Elf_Sym Elf_Sym;
464 typedef typename ELFObjectFile<ELFT>::Elf_Shdr Elf_Shdr;
467 symbol_iterator SymI(I);
469 DataRefImpl Symb = I->getRawDataRefImpl();
470 const Elf_Sym *ESym = Obj.getSymbol(Symb);
471 const ELFFile<ELFT> &EF = *Obj.getELFFile();
472 const Elf_Shdr *ESec = EF.getSection(ESym);
475 switch (ESec->sh_type) {
476 case ELF::SHT_PROGBITS:
477 case ELF::SHT_DYNAMIC:
478 switch (ESec->sh_flags) {
479 case(ELF::SHF_ALLOC | ELF::SHF_EXECINSTR) :
481 case(ELF::SHF_TLS | ELF::SHF_ALLOC | ELF::SHF_WRITE) :
482 case(ELF::SHF_ALLOC | ELF::SHF_WRITE) :
485 case(ELF::SHF_ALLOC | ELF::SHF_MERGE) :
486 case(ELF::SHF_ALLOC | ELF::SHF_MERGE | ELF::SHF_STRINGS) :
490 case ELF::SHT_NOBITS:
495 if (ESym->getType() == ELF::STT_SECTION) {
497 if (error(SymI->getName(Name)))
499 return StringSwitch<char>(Name)
500 .StartsWith(".debug", 'N')
501 .StartsWith(".note", 'n')
508 static char getSymbolNMTypeChar(COFFObjectFile &Obj, symbol_iterator I) {
509 const coff_symbol *Symb = Obj.getCOFFSymbol(*I);
511 symbol_iterator SymI(I);
514 if (error(SymI->getName(Name)))
517 char Ret = StringSwitch<char>(Name)
518 .StartsWith(".debug", 'N')
519 .StartsWith(".sxdata", 'N')
525 uint32_t Characteristics = 0;
526 if (!COFF::isReservedSectionNumber(Symb->SectionNumber)) {
527 section_iterator SecI = Obj.section_end();
528 if (error(SymI->getSection(SecI)))
530 const coff_section *Section = Obj.getCOFFSection(*SecI);
531 Characteristics = Section->Characteristics;
534 switch (Symb->SectionNumber) {
535 case COFF::IMAGE_SYM_DEBUG:
538 // Check section type.
539 if (Characteristics & COFF::IMAGE_SCN_CNT_CODE)
541 else if (Characteristics & COFF::IMAGE_SCN_MEM_READ &&
542 ~Characteristics & COFF::IMAGE_SCN_MEM_WRITE) // Read only.
544 else if (Characteristics & COFF::IMAGE_SCN_CNT_INITIALIZED_DATA)
546 else if (Characteristics & COFF::IMAGE_SCN_CNT_UNINITIALIZED_DATA)
548 else if (Characteristics & COFF::IMAGE_SCN_LNK_INFO)
551 // Check for section symbol.
552 else if (Symb->isSectionDefinition())
559 static uint8_t getNType(MachOObjectFile &Obj, DataRefImpl Symb) {
561 MachO::nlist_64 STE = Obj.getSymbol64TableEntry(Symb);
564 MachO::nlist STE = Obj.getSymbolTableEntry(Symb);
568 static char getSymbolNMTypeChar(MachOObjectFile &Obj, basic_symbol_iterator I) {
569 DataRefImpl Symb = I->getRawDataRefImpl();
570 uint8_t NType = getNType(Obj, Symb);
572 switch (NType & MachO::N_TYPE) {
577 case MachO::N_SECT: {
578 section_iterator Sec = Obj.section_end();
579 Obj.getSymbolSection(Symb, Sec);
580 DataRefImpl Ref = Sec->getRawDataRefImpl();
581 StringRef SectionName;
582 Obj.getSectionName(Ref, SectionName);
583 StringRef SegmentName = Obj.getSectionFinalSegmentName(Ref);
584 if (SegmentName == "__TEXT" && SectionName == "__text")
586 else if (SegmentName == "__DATA" && SectionName == "__data")
588 else if (SegmentName == "__DATA" && SectionName == "__bss")
598 static char getSymbolNMTypeChar(const GlobalValue &GV) {
599 if (GV.getType()->getElementType()->isFunctionTy())
601 // FIXME: should we print 'b'? At the IR level we cannot be sure if this
602 // will be in bss or not, but we could approximate.
606 static char getSymbolNMTypeChar(IRObjectFile &Obj, basic_symbol_iterator I) {
607 const GlobalValue &GV = Obj.getSymbolGV(I->getRawDataRefImpl());
608 return getSymbolNMTypeChar(GV);
611 template <class ELFT>
612 static bool isObject(ELFObjectFile<ELFT> &Obj, symbol_iterator I) {
613 typedef typename ELFObjectFile<ELFT>::Elf_Sym Elf_Sym;
615 DataRefImpl Symb = I->getRawDataRefImpl();
616 const Elf_Sym *ESym = Obj.getSymbol(Symb);
618 return ESym->getType() == ELF::STT_OBJECT;
621 static bool isObject(SymbolicFile *Obj, basic_symbol_iterator I) {
622 if (ELF32LEObjectFile *ELF = dyn_cast<ELF32LEObjectFile>(Obj))
623 return isObject(*ELF, I);
624 if (ELF64LEObjectFile *ELF = dyn_cast<ELF64LEObjectFile>(Obj))
625 return isObject(*ELF, I);
626 if (ELF32BEObjectFile *ELF = dyn_cast<ELF32BEObjectFile>(Obj))
627 return isObject(*ELF, I);
628 if (ELF64BEObjectFile *ELF = dyn_cast<ELF64BEObjectFile>(Obj))
629 return isObject(*ELF, I);
633 static char getNMTypeChar(SymbolicFile *Obj, basic_symbol_iterator I) {
634 uint32_t Symflags = I->getFlags();
635 if ((Symflags & object::SymbolRef::SF_Weak) && !isa<MachOObjectFile>(Obj)) {
636 char Ret = isObject(Obj, I) ? 'v' : 'w';
637 if (!(Symflags & object::SymbolRef::SF_Undefined))
642 if (Symflags & object::SymbolRef::SF_Undefined)
645 if (Symflags & object::SymbolRef::SF_Common)
649 if (Symflags & object::SymbolRef::SF_Absolute)
651 else if (IRObjectFile *IR = dyn_cast<IRObjectFile>(Obj))
652 Ret = getSymbolNMTypeChar(*IR, I);
653 else if (COFFObjectFile *COFF = dyn_cast<COFFObjectFile>(Obj))
654 Ret = getSymbolNMTypeChar(*COFF, I);
655 else if (MachOObjectFile *MachO = dyn_cast<MachOObjectFile>(Obj))
656 Ret = getSymbolNMTypeChar(*MachO, I);
657 else if (ELF32LEObjectFile *ELF = dyn_cast<ELF32LEObjectFile>(Obj))
658 Ret = getSymbolNMTypeChar(*ELF, I);
659 else if (ELF64LEObjectFile *ELF = dyn_cast<ELF64LEObjectFile>(Obj))
660 Ret = getSymbolNMTypeChar(*ELF, I);
661 else if (ELF32BEObjectFile *ELF = dyn_cast<ELF32BEObjectFile>(Obj))
662 Ret = getSymbolNMTypeChar(*ELF, I);
664 Ret = getSymbolNMTypeChar(*cast<ELF64BEObjectFile>(Obj), I);
666 if (Symflags & object::SymbolRef::SF_Global)
672 static void dumpSymbolNamesFromObject(SymbolicFile *Obj, bool printName) {
673 basic_symbol_iterator IBegin = Obj->symbol_begin();
674 basic_symbol_iterator IEnd = Obj->symbol_end();
677 error("File format has no dynamic symbol table", Obj->getFileName());
680 std::pair<symbol_iterator, symbol_iterator> IDyn =
681 getELFDynamicSymbolIterators(Obj);
685 std::string NameBuffer;
686 raw_string_ostream OS(NameBuffer);
687 for (basic_symbol_iterator I = IBegin; I != IEnd; ++I) {
688 uint32_t SymFlags = I->getFlags();
689 if (!DebugSyms && (SymFlags & SymbolRef::SF_FormatSpecific))
691 if (WithoutAliases) {
692 if (IRObjectFile *IR = dyn_cast<IRObjectFile>(Obj)) {
693 const GlobalValue &GV = IR->getSymbolGV(I->getRawDataRefImpl());
694 if(isa<GlobalAlias>(GV))
699 S.Size = UnknownAddressOrSize;
700 S.Address = UnknownAddressOrSize;
701 if ((PrintSize || SizeSort) && isa<ObjectFile>(Obj)) {
702 symbol_iterator SymI = I;
703 if (error(SymI->getSize(S.Size)))
706 if (PrintAddress && isa<ObjectFile>(Obj))
707 if (error(symbol_iterator(I)->getAddress(S.Address)))
709 S.TypeChar = getNMTypeChar(Obj, I);
710 if (error(I->printName(OS)))
713 S.Symb = I->getRawDataRefImpl();
714 SymbolList.push_back(S);
718 const char *P = NameBuffer.c_str();
719 for (unsigned I = 0; I < SymbolList.size(); ++I) {
720 SymbolList[I].Name = P;
724 CurrentFilename = Obj->getFileName();
725 sortAndPrintSymbolList(Obj, printName);
728 // checkMachOAndArchFlags() checks to see if the SymbolicFile is a Mach-O file
729 // and if it is and there is a list of architecture flags is specified then
730 // check to make sure this Mach-O file is one of those architectures or all
731 // architectures was specificed. If not then an error is generated and this
732 // routine returns false. Else it returns true.
733 static bool checkMachOAndArchFlags(SymbolicFile *O, std::string &Filename) {
734 if (isa<MachOObjectFile>(O) && !ArchAll && ArchFlags.size() != 0) {
735 MachOObjectFile *MachO = dyn_cast<MachOObjectFile>(O);
736 bool ArchFound = false;
737 MachO::mach_header H;
738 MachO::mach_header_64 H_64;
740 if (MachO->is64Bit()) {
741 H_64 = MachO->MachOObjectFile::getHeader64();
742 T = MachOObjectFile::getArch(H_64.cputype, H_64.cpusubtype);
744 H = MachO->MachOObjectFile::getHeader();
745 T = MachOObjectFile::getArch(H.cputype, H.cpusubtype);
748 for (i = 0; i < ArchFlags.size(); ++i){
749 if (ArchFlags[i] == T.getArchName())
755 "file: " + Filename + " does not contain architecture");
762 static void dumpSymbolNamesFromFile(std::string &Filename) {
763 std::unique_ptr<MemoryBuffer> Buffer;
764 if (error(MemoryBuffer::getFileOrSTDIN(Filename, Buffer), Filename))
767 LLVMContext &Context = getGlobalContext();
768 ErrorOr<Binary *> BinaryOrErr = createBinary(Buffer, &Context);
769 if (error(BinaryOrErr.getError(), Filename))
772 std::unique_ptr<Binary> Bin(BinaryOrErr.get());
774 if (Archive *A = dyn_cast<Archive>(Bin.get())) {
776 Archive::symbol_iterator I = A->symbol_begin();
777 Archive::symbol_iterator E = A->symbol_end();
779 outs() << "Archive map\n";
780 for (; I != E; ++I) {
781 ErrorOr<Archive::child_iterator> C = I->getMember();
782 if (error(C.getError()))
784 ErrorOr<StringRef> FileNameOrErr = C.get()->getName();
785 if (error(FileNameOrErr.getError()))
787 StringRef SymName = I->getName();
788 outs() << SymName << " in " << FileNameOrErr.get() << "\n";
794 for (Archive::child_iterator I = A->child_begin(), E = A->child_end();
796 ErrorOr<std::unique_ptr<Binary>> ChildOrErr = I->getAsBinary(&Context);
797 if (ChildOrErr.getError())
799 if (SymbolicFile *O = dyn_cast<SymbolicFile>(&*ChildOrErr.get())) {
800 if (!checkMachOAndArchFlags(O, Filename))
803 if (isa<MachOObjectFile>(O)) {
804 outs() << Filename << "(" << O->getFileName() << ")";
806 outs() << O->getFileName();
808 dumpSymbolNamesFromObject(O, false);
813 if (MachOUniversalBinary *UB = dyn_cast<MachOUniversalBinary>(Bin.get())) {
814 // If we have a list of architecture flags specified dump only those.
815 if (!ArchAll && ArchFlags.size() != 0) {
816 // Look for a slice in the universal binary that matches each ArchFlag.
818 for (unsigned i = 0; i < ArchFlags.size(); ++i){
820 for (MachOUniversalBinary::object_iterator I = UB->begin_objects(),
821 E = UB->end_objects();
823 if (ArchFlags[i] == I->getArchTypeName()){
825 ErrorOr<std::unique_ptr<ObjectFile>> ObjOrErr =
826 I->getAsObjectFile();
827 std::unique_ptr<Archive> A;
829 std::unique_ptr<ObjectFile> Obj = std::move(ObjOrErr.get());
830 if (ArchFlags.size() > 1) {
831 outs() << "\n" << Obj->getFileName()
832 << " (for architecture " << I->getArchTypeName() << ")"
835 dumpSymbolNamesFromObject(Obj.get(), false);
837 else if (!I->getAsArchive(A)) {
838 for (Archive::child_iterator AI = A->child_begin(),
841 ErrorOr<std::unique_ptr<Binary>> ChildOrErr =
842 AI->getAsBinary(&Context);
843 if (ChildOrErr.getError())
845 if (SymbolicFile *O = dyn_cast<SymbolicFile>
846 (&*ChildOrErr.get())) {
847 outs() << "\n" << A->getFileName();
848 outs() << "(" << O->getFileName() << ")";
849 if (ArchFlags.size() > 1) {
850 outs() << " (for architecture " << I->getArchTypeName()
854 dumpSymbolNamesFromObject(O, false);
862 "file: " + Filename + " does not contain architecture");
868 // No architecture flags were specified so if this contains a slice that
869 // matches the host architecture dump only that.
871 StringRef HostArchName =
872 MachOObjectFile::getHostArch().getArchName();
873 for (MachOUniversalBinary::object_iterator I = UB->begin_objects(),
874 E = UB->end_objects();
876 if (HostArchName == I->getArchTypeName()){
877 ErrorOr<std::unique_ptr<ObjectFile>> ObjOrErr =
878 I->getAsObjectFile();
879 std::unique_ptr<Archive> A;
881 std::unique_ptr<ObjectFile> Obj = std::move(ObjOrErr.get());
882 dumpSymbolNamesFromObject(Obj.get(), false);
884 else if (!I->getAsArchive(A)) {
885 for (Archive::child_iterator AI = A->child_begin(),
888 ErrorOr<std::unique_ptr<Binary>> ChildOrErr =
889 AI->getAsBinary(&Context);
890 if (ChildOrErr.getError())
892 if (SymbolicFile *O = dyn_cast<SymbolicFile>
893 (&*ChildOrErr.get())) {
894 outs() << "\n" << A->getFileName()
895 << "(" << O->getFileName() << ")" << ":\n";
896 dumpSymbolNamesFromObject(O, false);
904 // Either all architectures have been specified or none have been specified
905 // and this does not contain the host architecture so dump all the slices.
906 bool moreThanOneArch = UB->getNumberOfObjects() > 1;
907 for (MachOUniversalBinary::object_iterator I = UB->begin_objects(),
908 E = UB->end_objects();
910 ErrorOr<std::unique_ptr<ObjectFile>> ObjOrErr = I->getAsObjectFile();
911 std::unique_ptr<Archive> A;
913 std::unique_ptr<ObjectFile> Obj = std::move(ObjOrErr.get());
916 outs() << Obj->getFileName();
917 if (isa<MachOObjectFile>(Obj.get()) && moreThanOneArch)
918 outs() << " (for architecture " << I->getArchTypeName() << ")";
920 dumpSymbolNamesFromObject(Obj.get(), false);
922 else if (!I->getAsArchive(A)) {
923 for (Archive::child_iterator AI = A->child_begin(), AE = A->child_end();
925 ErrorOr<std::unique_ptr<Binary>> ChildOrErr =
926 AI->getAsBinary(&Context);
927 if (ChildOrErr.getError())
929 if (SymbolicFile *O = dyn_cast<SymbolicFile>(&*ChildOrErr.get())) {
930 outs() << "\n" << A->getFileName();
931 if (isa<MachOObjectFile>(O)) {
932 outs() << "(" << O->getFileName() << ")";
934 outs() << " (for architecture " << I->getArchTypeName() << ")";
936 outs() << ":" << O->getFileName();
938 dumpSymbolNamesFromObject(O, false);
945 if (SymbolicFile *O = dyn_cast<SymbolicFile>(Bin.get())) {
946 if (!checkMachOAndArchFlags(O, Filename))
948 dumpSymbolNamesFromObject(O, true);
951 error("unrecognizable file type", Filename);
955 int main(int argc, char **argv) {
956 // Print a stack trace if we signal out.
957 sys::PrintStackTraceOnErrorSignal();
958 PrettyStackTraceProgram X(argc, argv);
960 llvm_shutdown_obj Y; // Call llvm_shutdown() on exit.
961 cl::ParseCommandLineOptions(argc, argv, "llvm symbol table dumper\n");
963 // llvm-nm only reads binary files.
964 if (error(sys::ChangeStdinToBinary()))
971 OutputFormat = posix;
973 OutputFormat = darwin;
975 // The relative order of these is important. If you pass --size-sort it should
976 // only print out the size. However, if you pass -S --size-sort, it should
977 // print out both the size and address.
978 if (SizeSort && !PrintSize)
979 PrintAddress = false;
980 if (OutputFormat == sysv || SizeSort)
983 switch (InputFilenames.size()) {
985 InputFilenames.push_back("a.out");
989 MultipleFiles = true;
992 for (unsigned i = 0; i < ArchFlags.size(); ++i){
993 if (ArchFlags[i] == "all") {
997 Triple T = MachOObjectFile::getArch(ArchFlags[i]);
998 if (T.getArch() == Triple::UnknownArch)
999 error("Unknown architecture named '" + ArchFlags[i] + "'",
1000 "for the -arch option");
1004 std::for_each(InputFilenames.begin(), InputFilenames.end(),
1005 dumpSymbolNamesFromFile);