tools/llvm-ranlib/llvm-ranlib.cpp

   1 //===-- llvm-ranlib.cpp - LLVM archive index generator --------------------===//
   2 //
   3 //                     The LLVM Compiler Infrastructure
   4 //
   5 // This file was developed by Reid Spencer and is distributed under the
   6 // University of Illinois Open Source 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/Module.h"
  15 #include "llvm/Bitcode/Archive.h"
  16 #include "llvm/Support/CommandLine.h"
  17 #include "llvm/Support/ManagedStatic.h"
  18 #include "llvm/System/Signals.h"
  19 #include <iostream>
  20 #include <iomanip>
  21 #include <memory>
  22
  23 using namespace llvm;
  24
  25 // llvm-ar operation code and modifier flags
  26 static cl::opt<std::string>
  27 ArchiveName(cl::Positional, cl::Optional, cl::desc("<archive-file>"));
  28
  29 static cl::opt<bool>
  30 Verbose("verbose",cl::Optional,cl::init(false),
  31         cl::desc("Print the symbol table"));
  32
  33 // printSymbolTable - print out the archive's symbol table.
  34 void printSymbolTable(Archive* TheArchive) {
  35   std::cout << "\nArchive Symbol Table:\n";
  36   const Archive::SymTabType& symtab = TheArchive->getSymbolTable();
  37   for (Archive::SymTabType::const_iterator I=symtab.begin(), E=symtab.end();
  38        I != E; ++I ) {
  39     unsigned offset = TheArchive->getFirstFileOffset() + I->second;
  40     std::cout << " " << std::setw(9) << offset << "\t" << I->first <<"\n";
  41   }
  42 }
  43
  44 int main(int argc, char **argv) {
  45   llvm_shutdown_obj X;  // Call llvm_shutdown() on exit.
  46
  47   // Have the command line options parsed and handle things
  48   // like --help and --version.
  49   cl::ParseCommandLineOptions(argc, argv,
  50     " LLVM Archive Index Generator (llvm-ranlib)\n\n"
  51     "  This program adds or updates an index of bitcode symbols\n"
  52     "  to an LLVM archive file."
  53   );
  54
  55   // Print a stack trace if we signal out.
  56   sys::PrintStackTraceOnErrorSignal();
  57
  58   int exitCode = 0;
  59
  60   // Make sure we don't exit with "unhandled exception".
  61   try {
  62
  63     // Check the path name of the archive
  64     sys::Path ArchivePath;
  65     if (!ArchivePath.set(ArchiveName))
  66       throw std::string("Archive name invalid: ") + ArchiveName;
  67
  68     // Make sure it exists, we don't create empty archives
  69     if (!ArchivePath.exists())
  70       throw std::string("Archive file does not exist");
  71
  72     std::string err_msg;
  73     std::auto_ptr<Archive>
  74       AutoArchive(Archive::OpenAndLoad(ArchivePath,&err_msg));
  75     Archive* TheArchive = AutoArchive.get();
  76     if (!TheArchive)
  77       throw err_msg;
  78
  79     if (TheArchive->writeToDisk(true, false, false, &err_msg ))
  80       throw err_msg;
  81
  82     if (Verbose)
  83       printSymbolTable(TheArchive);
  84
  85   } catch (const char*msg) {
  86     std::cerr << argv[0] << ": " << msg << "\n\n";
  87     exitCode = 1;
  88   } catch (const std::string& msg) {
  89     std::cerr << argv[0] << ": " << msg << "\n";
  90     exitCode = 2;
  91   } catch (...) {
  92     std::cerr << argv[0] << ": An unexpected unknown exception occurred.\n";
  93     exitCode = 3;
  94   }
  95   return exitCode;
  96 }