tools/llvm-ranlib/llvm-ranlib.cpp

   1 //===-- llvm-ranlib.cpp - LLVM archive index generator --------------------===//
   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 // Adds or updates an index (symbol table) for an LLVM archive file.
  11 //
  12 //===----------------------------------------------------------------------===//
  13
  14 #include "llvm/LLVMContext.h"
  15 #include "llvm/Module.h"
  16 #include "llvm/Bitcode/Archive.h"
  17 #include "llvm/Support/CommandLine.h"
  18 #include "llvm/Support/FileSystem.h"
  19 #include "llvm/Support/ManagedStatic.h"
  20 #include "llvm/Support/PrettyStackTrace.h"
  21 #include "llvm/Support/Format.h"
  22 #include "llvm/Support/raw_ostream.h"
  23 #include "llvm/Support/Signals.h"
  24 #include <memory>
  25 using namespace llvm;
  26
  27 // llvm-ar operation code and modifier flags
  28 static cl::opt<std::string>
  29 ArchiveName(cl::Positional, cl::Optional, cl::desc("<archive-file>"));
  30
  31 static cl::opt<bool>
  32 Verbose("verbose",cl::Optional,cl::init(false),
  33         cl::desc("Print the symbol table"));
  34
  35 // printSymbolTable - print out the archive's symbol table.
  36 void printSymbolTable(Archive* TheArchive) {
  37   outs() << "\nArchive Symbol Table:\n";
  38   const Archive::SymTabType& symtab = TheArchive->getSymbolTable();
  39   for (Archive::SymTabType::const_iterator I=symtab.begin(), E=symtab.end();
  40        I != E; ++I ) {
  41     unsigned offset = TheArchive->getFirstFileOffset() + I->second;
  42     outs() << " " << format("%9u", offset) << "\t" << I->first <<"\n";
  43   }
  44 }
  45
  46 int main(int argc, char **argv) {
  47   // Print a stack trace if we signal out.
  48   llvm::sys::PrintStackTraceOnErrorSignal();
  49   llvm::PrettyStackTraceProgram X(argc, argv);
  50
  51   LLVMContext &Context = getGlobalContext();
  52   llvm_shutdown_obj Y;  // Call llvm_shutdown() on exit.
  53
  54   // Have the command line options parsed and handle things
  55   // like --help and --version.
  56   cl::ParseCommandLineOptions(argc, argv,
  57     "LLVM Archive Index Generator (llvm-ranlib)\n\n"
  58     "  This program adds or updates an index of bitcode symbols\n"
  59     "  to an LLVM archive file."
  60   );
  61
  62   int exitCode = 0;
  63
  64   // Make sure we don't exit with "unhandled exception".
  65   try {
  66
  67     // Check the path name of the archive
  68     sys::Path ArchivePath;
  69     if (!ArchivePath.set(ArchiveName))
  70       throw std::string("Archive name invalid: ") + ArchiveName;
  71
  72     // Make sure it exists, we don't create empty archives
  73     bool Exists;
  74     if (llvm::sys::fs::exists(ArchivePath.str(), Exists) || !Exists)
  75       throw std::string("Archive file does not exist");
  76
  77     std::string err_msg;
  78     std::auto_ptr<Archive>
  79       AutoArchive(Archive::OpenAndLoad(ArchivePath, Context, &err_msg));
  80     Archive* TheArchive = AutoArchive.get();
  81     if (!TheArchive)
  82       throw err_msg;
  83
  84     if (TheArchive->writeToDisk(true, false, false, &err_msg ))
  85       throw err_msg;
  86
  87     if (Verbose)
  88       printSymbolTable(TheArchive);
  89
  90   } catch (const char* msg) {
  91     errs() << argv[0] << ": " << msg << "\n\n";
  92     exitCode = 1;
  93   } catch (const std::string& msg) {
  94     errs() << argv[0] << ": " << msg << "\n";
  95     exitCode = 2;
  96   } catch (...) {
  97     errs() << argv[0] << ": An unexpected unknown exception occurred.\n";
  98     exitCode = 3;
  99   }
 100   return exitCode;
 101 }