//
// The LLVM Compiler Infrastructure
//
-// This file was developed by the LLVM research group and is distributed under
-// the University of Illinois Open Source License. See LICENSE.TXT for details.
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
-// This program is a utility that works like traditional Unix "nm",
-// that is, it prints out the names of symbols in a bytecode file,
-// along with some information about each symbol.
+// This program is a utility that works like traditional Unix "nm", that is, it
+// prints out the names of symbols in a bitcode or object file, along with some
+// information about each symbol.
//
-// This "nm" does not print symbols' addresses. It supports many of
-// the features of GNU "nm", including its different output formats.
+// This "nm" supports many of the features of GNU "nm", including its different
+// output formats.
//
//===----------------------------------------------------------------------===//
+#include "llvm/LLVMContext.h"
#include "llvm/Module.h"
#include "llvm/Bitcode/ReaderWriter.h"
-#include "llvm/Bytecode/Reader.h"
-#include "llvm/Bytecode/Archive.h"
+#include "llvm/Bitcode/Archive.h"
+#include "llvm/Object/Archive.h"
+#include "llvm/Object/ObjectFile.h"
#include "llvm/Support/CommandLine.h"
+#include "llvm/Support/FileSystem.h"
#include "llvm/Support/ManagedStatic.h"
#include "llvm/Support/MemoryBuffer.h"
-#include "llvm/System/Signals.h"
+#include "llvm/Support/PrettyStackTrace.h"
+#include "llvm/Support/Program.h"
+#include "llvm/Support/raw_ostream.h"
+#include "llvm/Support/Signals.h"
+#include "llvm/Support/Format.h"
+#include "llvm/Support/system_error.h"
#include <algorithm>
#include <cctype>
#include <cerrno>
#include <cstring>
-#include <iostream>
+#include <vector>
using namespace llvm;
-
-cl::opt<bool> Bitcode("bitcode");
+using namespace object;
namespace {
enum OutputFormatTy { bsd, sysv, posix };
cl::aliasopt(OutputFormat));
cl::list<std::string>
- InputFilenames(cl::Positional, cl::desc("<input bytecode files>"),
+ InputFilenames(cl::Positional, cl::desc("<input bitcode files>"),
cl::ZeroOrMore);
cl::opt<bool> UndefinedOnly("undefined-only",
cl::alias UndefinedOnly2("u", cl::desc("Alias for --undefined-only"),
cl::aliasopt(UndefinedOnly));
+ cl::opt<bool> DynamicSyms("dynamic",
+ cl::desc("Display the dynamic symbols instead "
+ "of normal symbols."));
+ cl::alias DynamicSyms2("D", cl::desc("Alias for --dynamic"),
+ cl::aliasopt(DynamicSyms));
+
cl::opt<bool> DefinedOnly("defined-only",
cl::desc("Show only defined symbols"));
cl::opt<bool> BSDFormat("B", cl::desc("Alias for --format=bsd"));
cl::opt<bool> POSIXFormat("P", cl::desc("Alias for --format=posix"));
+ cl::opt<bool> PrintFileName("print-file-name",
+ cl::desc("Precede each symbol with the object file it came from"));
+
+ cl::alias PrintFileNameA("A", cl::desc("Alias for --print-file-name"),
+ cl::aliasopt(PrintFileName));
+ cl::alias PrintFileNameo("o", cl::desc("Alias for --print-file-name"),
+ cl::aliasopt(PrintFileName));
+
+ cl::opt<bool> DebugSyms("debug-syms",
+ cl::desc("Show all symbols, even debugger only"));
+ cl::alias DebugSymsa("a", cl::desc("Alias for --debug-syms"),
+ cl::aliasopt(DebugSyms));
+
+ cl::opt<bool> NumericSort("numeric-sort",
+ cl::desc("Sort symbols by address"));
+ cl::alias NumericSortn("n", cl::desc("Alias for --numeric-sort"),
+ cl::aliasopt(NumericSort));
+ cl::alias NumericSortv("v", cl::desc("Alias for --numeric-sort"),
+ cl::aliasopt(NumericSort));
+
+ cl::opt<bool> NoSort("no-sort",
+ cl::desc("Show symbols in order encountered"));
+ cl::alias NoSortp("p", cl::desc("Alias for --no-sort"),
+ cl::aliasopt(NoSort));
+
+ cl::opt<bool> PrintSize("print-size",
+ cl::desc("Show symbol size instead of address"));
+ cl::alias PrintSizeS("S", cl::desc("Alias for --print-size"),
+ cl::aliasopt(PrintSize));
+
+ cl::opt<bool> SizeSort("size-sort", cl::desc("Sort symbols by size"));
+
+ bool PrintAddress = true;
+
bool MultipleFiles = false;
std::string ToolName;
}
+
+static void error(Twine message, Twine path = Twine()) {
+ errs() << ToolName << ": " << path << ": " << message << ".\n";
+}
+
+static bool error(error_code ec, Twine path = Twine()) {
+ if (ec) {
+ error(ec.message(), path);
+ return true;
+ }
+ return false;
+}
+
+namespace {
+ struct NMSymbol {
+ uint64_t Address;
+ uint64_t Size;
+ char TypeChar;
+ StringRef Name;
+ };
+
+ static bool CompareSymbolAddress(const NMSymbol &a, const NMSymbol &b) {
+ if (a.Address < b.Address)
+ return true;
+ else if (a.Address == b.Address && a.Name < b.Name)
+ return true;
+ else
+ return false;
+
+ }
+
+ static bool CompareSymbolSize(const NMSymbol &a, const NMSymbol &b) {
+ if (a.Size < b.Size)
+ return true;
+ else if (a.Size == b.Size && a.Name < b.Name)
+ return true;
+ else
+ return false;
+ }
+
+ static bool CompareSymbolName(const NMSymbol &a, const NMSymbol &b) {
+ return a.Name < b.Name;
+ }
+
+ StringRef CurrentFilename;
+ typedef std::vector<NMSymbol> SymbolListT;
+ SymbolListT SymbolList;
+}
+
+static void SortAndPrintSymbolList() {
+ if (!NoSort) {
+ if (NumericSort)
+ std::sort(SymbolList.begin(), SymbolList.end(), CompareSymbolAddress);
+ else if (SizeSort)
+ std::sort(SymbolList.begin(), SymbolList.end(), CompareSymbolSize);
+ else
+ std::sort(SymbolList.begin(), SymbolList.end(), CompareSymbolName);
+ }
+
+ if (OutputFormat == posix && MultipleFiles) {
+ outs() << '\n' << CurrentFilename << ":\n";
+ } else if (OutputFormat == bsd && MultipleFiles) {
+ outs() << "\n" << CurrentFilename << ":\n";
+ } else if (OutputFormat == sysv) {
+ outs() << "\n\nSymbols from " << CurrentFilename << ":\n\n"
+ << "Name Value Class Type"
+ << " Size Line Section\n";
+ }
+
+ for (SymbolListT::iterator i = SymbolList.begin(),
+ e = SymbolList.end(); i != e; ++i) {
+ if ((i->TypeChar != 'U') && UndefinedOnly)
+ continue;
+ if ((i->TypeChar == 'U') && DefinedOnly)
+ continue;
+ if (SizeSort && !PrintAddress && i->Size == UnknownAddressOrSize)
+ continue;
+
+ char SymbolAddrStr[10] = "";
+ char SymbolSizeStr[10] = "";
+
+ if (OutputFormat == sysv || i->Address == object::UnknownAddressOrSize)
+ strcpy(SymbolAddrStr, " ");
+ if (OutputFormat == sysv)
+ strcpy(SymbolSizeStr, " ");
+
+ if (i->Address != object::UnknownAddressOrSize)
+ format("%08" PRIx64, i->Address).print(SymbolAddrStr,
+ sizeof(SymbolAddrStr));
+ if (i->Size != object::UnknownAddressOrSize)
+ format("%08" PRIx64, i->Size).print(SymbolSizeStr, sizeof(SymbolSizeStr));
+
+ if (OutputFormat == posix) {
+ outs() << i->Name << " " << i->TypeChar << " "
+ << SymbolAddrStr << SymbolSizeStr << "\n";
+ } else if (OutputFormat == bsd) {
+ if (PrintAddress)
+ outs() << SymbolAddrStr << ' ';
+ if (PrintSize) {
+ outs() << SymbolSizeStr;
+ if (i->Size != object::UnknownAddressOrSize)
+ outs() << ' ';
+ }
+ outs() << i->TypeChar << " " << i->Name << "\n";
+ } else if (OutputFormat == sysv) {
+ std::string PaddedName (i->Name);
+ while (PaddedName.length () < 20)
+ PaddedName += " ";
+ outs() << PaddedName << "|" << SymbolAddrStr << "| "
+ << i->TypeChar
+ << " | |" << SymbolSizeStr << "| |\n";
+ }
+ }
+
+ SymbolList.clear();
+}
+
static char TypeCharForSymbol(GlobalValue &GV) {
- if (GV.isDeclaration()) return 'U';
+ if (GV.isDeclaration()) return 'U';
if (GV.hasLinkOnceLinkage()) return 'C';
+ if (GV.hasCommonLinkage()) return 'C';
if (GV.hasWeakLinkage()) return 'W';
- if (isa<Function>(GV) && GV.hasInternalLinkage()) return 't';
+ if (isa<Function>(GV) && GV.hasInternalLinkage()) return 't';
if (isa<Function>(GV)) return 'T';
- if (isa<GlobalVariable>(GV) && GV.hasInternalLinkage()) return 'd';
+ if (isa<GlobalVariable>(GV) && GV.hasInternalLinkage()) return 'd';
if (isa<GlobalVariable>(GV)) return 'D';
- return '?';
+ if (const GlobalAlias *GA = dyn_cast<GlobalAlias>(&GV)) {
+ const GlobalValue *AliasedGV = GA->getAliasedGlobal();
+ if (isa<Function>(AliasedGV)) return 'T';
+ if (isa<GlobalVariable>(AliasedGV)) return 'D';
+ }
+ return '?';
}
static void DumpSymbolNameForGlobalValue(GlobalValue &GV) {
- const std::string SymbolAddrStr = " "; // Not used yet...
- char TypeChar = TypeCharForSymbol (GV);
- if ((TypeChar != 'U') && UndefinedOnly)
+ // Private linkage and available_externally linkage don't exist in symtab.
+ if (GV.hasPrivateLinkage() ||
+ GV.hasLinkerPrivateLinkage() ||
+ GV.hasLinkerPrivateWeakLinkage() ||
+ GV.hasLinkerPrivateWeakDefAutoLinkage() ||
+ GV.hasAvailableExternallyLinkage())
return;
- if ((TypeChar == 'U') && DefinedOnly)
+ char TypeChar = TypeCharForSymbol(GV);
+ if (GV.hasLocalLinkage () && ExternalOnly)
return;
- if (GV.hasInternalLinkage () && ExternalOnly)
- return;
- if (OutputFormat == posix) {
- std::cout << GV.getName () << " " << TypeCharForSymbol (GV) << " "
- << SymbolAddrStr << "\n";
- } else if (OutputFormat == bsd) {
- std::cout << SymbolAddrStr << " " << TypeCharForSymbol (GV) << " "
- << GV.getName () << "\n";
- } else if (OutputFormat == sysv) {
- std::string PaddedName (GV.getName ());
- while (PaddedName.length () < 20)
- PaddedName += " ";
- std::cout << PaddedName << "|" << SymbolAddrStr << "| "
- << TypeCharForSymbol (GV)
- << " | | | |\n";
- }
+
+ NMSymbol s;
+ s.Address = object::UnknownAddressOrSize;
+ s.Size = object::UnknownAddressOrSize;
+ s.TypeChar = TypeChar;
+ s.Name = GV.getName();
+ SymbolList.push_back(s);
}
static void DumpSymbolNamesFromModule(Module *M) {
- const std::string &Filename = M->getModuleIdentifier ();
- if (OutputFormat == posix && MultipleFiles) {
- std::cout << Filename << ":\n";
- } else if (OutputFormat == bsd && MultipleFiles) {
- std::cout << "\n" << Filename << ":\n";
- } else if (OutputFormat == sysv) {
- std::cout << "\n\nSymbols from " << Filename << ":\n\n"
- << "Name Value Class Type"
- << " Size Line Section\n";
+ CurrentFilename = M->getModuleIdentifier();
+ std::for_each (M->begin(), M->end(), DumpSymbolNameForGlobalValue);
+ std::for_each (M->global_begin(), M->global_end(),
+ DumpSymbolNameForGlobalValue);
+ std::for_each (M->alias_begin(), M->alias_end(),
+ DumpSymbolNameForGlobalValue);
+
+ SortAndPrintSymbolList();
+}
+
+static void DumpSymbolNamesFromObject(ObjectFile *obj) {
+ error_code ec;
+ symbol_iterator ibegin = obj->begin_symbols();
+ symbol_iterator iend = obj->end_symbols();
+ if (DynamicSyms) {
+ ibegin = obj->begin_dynamic_symbols();
+ iend = obj->end_dynamic_symbols();
+ }
+ for (symbol_iterator i = ibegin; i != iend; i.increment(ec)) {
+ if (error(ec)) break;
+ uint32_t symflags;
+ if (error(i->getFlags(symflags))) break;
+ if (!DebugSyms && (symflags & SymbolRef::SF_FormatSpecific))
+ continue;
+ NMSymbol s;
+ s.Size = object::UnknownAddressOrSize;
+ s.Address = object::UnknownAddressOrSize;
+ if (PrintSize || SizeSort) {
+ if (error(i->getSize(s.Size))) break;
+ }
+ if (PrintAddress)
+ if (error(i->getAddress(s.Address))) break;
+ if (error(i->getNMTypeChar(s.TypeChar))) break;
+ if (error(i->getName(s.Name))) break;
+ SymbolList.push_back(s);
}
- std::for_each (M->begin (), M->end (), DumpSymbolNameForGlobalValue);
- std::for_each (M->global_begin (), M->global_end (), DumpSymbolNameForGlobalValue);
+
+ CurrentFilename = obj->getFileName();
+ SortAndPrintSymbolList();
}
static void DumpSymbolNamesFromFile(std::string &Filename) {
+ if (Filename != "-" && !sys::fs::exists(Filename)) {
+ errs() << ToolName << ": '" << Filename << "': " << "No such file\n";
+ return;
+ }
+
+ OwningPtr<MemoryBuffer> Buffer;
+ if (error(MemoryBuffer::getFileOrSTDIN(Filename, Buffer), Filename))
+ return;
+
+ sys::fs::file_magic magic = sys::fs::identify_magic(Buffer->getBuffer());
+
+ LLVMContext &Context = getGlobalContext();
std::string ErrorMessage;
- sys::Path aPath(Filename);
- // Note: Currently we do not support reading an archive from stdin.
- if (Filename == "-" || aPath.isBytecodeFile()) {
- Module *Result = ParseBytecodeFile(Filename,
- Compressor::decompressToNewBuffer,
- &ErrorMessage);
+ if (magic == sys::fs::file_magic::bitcode) {
+ Module *Result = 0;
+ Result = ParseBitcodeFile(Buffer.get(), Context, &ErrorMessage);
if (Result) {
- DumpSymbolNamesFromModule (Result);
+ DumpSymbolNamesFromModule(Result);
+ delete Result;
} else {
- std::cerr << ToolName << ": " << Filename << ": " << ErrorMessage << "\n";
+ error(ErrorMessage, Filename);
return;
}
- } else if (aPath.isBitcodeFile()) {
- std::auto_ptr<MemoryBuffer> Buffer(
- MemoryBuffer::getFileOrSTDIN(&Filename[0], Filename.size()));
- Module *Result = 0;
- if (Buffer.get())
- Result = ParseBitcodeFile(Buffer.get(), &ErrorMessage);
-
- if (Result)
- DumpSymbolNamesFromModule(Result);
- else {
- std::cerr << ToolName << ": " << Filename << ": " << ErrorMessage << "\n";
+ } else if (magic == sys::fs::file_magic::archive) {
+ OwningPtr<Binary> arch;
+ if (error(object::createBinary(Buffer.take(), arch), Filename))
return;
+
+ if (object::Archive *a = dyn_cast<object::Archive>(arch.get())) {
+ for (object::Archive::child_iterator i = a->begin_children(),
+ e = a->end_children(); i != e; ++i) {
+ OwningPtr<Binary> child;
+ if (i->getAsBinary(child)) {
+ // Try opening it as a bitcode file.
+ OwningPtr<MemoryBuffer> buff(i->getBuffer());
+ Module *Result = 0;
+ if (buff)
+ Result = ParseBitcodeFile(buff.get(), Context, &ErrorMessage);
+
+ if (Result) {
+ DumpSymbolNamesFromModule(Result);
+ delete Result;
+ }
+ continue;
+ }
+ if (object::ObjectFile *o = dyn_cast<ObjectFile>(child.get())) {
+ outs() << o->getFileName() << ":\n";
+ DumpSymbolNamesFromObject(o);
+ }
+ }
}
-
- } else if (aPath.isArchive()) {
- std::string ErrMsg;
- Archive* archive = Archive::OpenAndLoad(sys::Path(Filename), &ErrorMessage);
- if (!archive)
- std::cerr << ToolName << ": " << Filename << ": " << ErrorMessage << "\n";
- std::vector<Module *> Modules;
- if (archive->getAllModules(Modules, &ErrorMessage)) {
- std::cerr << ToolName << ": " << Filename << ": " << ErrorMessage << "\n";
+ } else if (magic.is_object()) {
+ OwningPtr<Binary> obj;
+ if (error(object::createBinary(Buffer.take(), obj), Filename))
return;
- }
- MultipleFiles = true;
- std::for_each (Modules.begin(), Modules.end(), DumpSymbolNamesFromModule);
+ if (object::ObjectFile *o = dyn_cast<ObjectFile>(obj.get()))
+ DumpSymbolNamesFromObject(o);
} else {
- std::cerr << ToolName << ": " << Filename << ": "
- << "unrecognizable file type\n";
+ errs() << ToolName << ": " << Filename << ": "
+ << "unrecognizable file type\n";
return;
}
}
int main(int argc, char **argv) {
- llvm_shutdown_obj X; // Call llvm_shutdown() on exit.
- cl::ParseCommandLineOptions(argc, argv, " llvm symbol table dumper\n");
+ // Print a stack trace if we signal out.
sys::PrintStackTraceOnErrorSignal();
+ PrettyStackTraceProgram X(argc, argv);
+
+ llvm_shutdown_obj Y; // Call llvm_shutdown() on exit.
+ cl::ParseCommandLineOptions(argc, argv, "llvm symbol table dumper\n");
+
+ // llvm-nm only reads binary files.
+ if (error(sys::Program::ChangeStdinToBinary()))
+ return 1;
ToolName = argv[0];
if (BSDFormat) OutputFormat = bsd;
if (POSIXFormat) OutputFormat = posix;
+ // The relative order of these is important. If you pass --size-sort it should
+ // only print out the size. However, if you pass -S --size-sort, it should
+ // print out both the size and address.
+ if (SizeSort && !PrintSize) PrintAddress = false;
+ if (OutputFormat == sysv || SizeSort) PrintSize = true;
+
switch (InputFilenames.size()) {
case 0: InputFilenames.push_back("-");
case 1: break;
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