tools/dsymutil/dsymutil.cpp

   1 //===-- dsymutil.cpp - Debug info 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 aims to be a dropin replacement for
  11 // Darwin's dsymutil.
  12 //
  13 //===----------------------------------------------------------------------===//
  14
  15 #include "DebugMap.h"
  16 #include "dsymutil.h"
  17 #include "llvm/Support/ManagedStatic.h"
  18 #include "llvm/Support/Options.h"
  19 #include "llvm/Support/PrettyStackTrace.h"
  20 #include "llvm/Support/Signals.h"
  21 #include "llvm/Support/raw_ostream.h"
  22 #include "llvm/Support/TargetSelect.h"
  23 #include <string>
  24
  25 using namespace llvm::dsymutil;
  26
  27 namespace {
  28 using namespace llvm::cl;
  29
  30 static opt<std::string> InputFile(Positional, desc("<input file>"),
  31                                   init("a.out"));
  32
  33 static opt<std::string> OutputFileOpt("o", desc("Specify the output file."
  34                                                 " default: <input file>.dwarf"),
  35                                       value_desc("filename"));
  36
  37 static opt<std::string> OsoPrependPath("oso-prepend-path",
  38                                        desc("Specify a directory to prepend "
  39                                             "to the paths of object files."),
  40                                        value_desc("path"));
  41
  42 static opt<bool> Verbose("v", desc("Verbosity level"), init(false));
  43
  44 static opt<bool> NoOutput("no-output", desc("Do the link in memory, but do "
  45                                             "not emit the result file."),
  46                           init(false));
  47
  48 static opt<bool>
  49     ParseOnly("parse-only",
  50               desc("Only parse the debug map, do not actaully link "
  51                    "the DWARF."),
  52               init(false));
  53 }
  54
  55 int main(int argc, char **argv) {
  56   llvm::sys::PrintStackTraceOnErrorSignal();
  57   llvm::PrettyStackTraceProgram StackPrinter(argc, argv);
  58   llvm::llvm_shutdown_obj Shutdown;
  59   LinkOptions Options;
  60
  61   llvm::cl::ParseCommandLineOptions(argc, argv, "llvm dsymutil\n");
  62   auto DebugMapPtrOrErr = parseDebugMap(InputFile, OsoPrependPath, Verbose);
  63
  64   Options.Verbose = Verbose;
  65   Options.NoOutput = NoOutput;
  66
  67   llvm::InitializeAllTargetInfos();
  68   llvm::InitializeAllTargetMCs();
  69   llvm::InitializeAllTargets();
  70   llvm::InitializeAllAsmPrinters();
  71
  72   if (auto EC = DebugMapPtrOrErr.getError()) {
  73     llvm::errs() << "error: cannot parse the debug map for \"" << InputFile
  74                  << "\": " << EC.message() << '\n';
  75     return 1;
  76   }
  77
  78   if (Verbose)
  79     (*DebugMapPtrOrErr)->print(llvm::outs());
  80
  81   if (ParseOnly)
  82     return 0;
  83
  84   std::string OutputFile;
  85   if (OutputFileOpt.empty()) {
  86     if (InputFile == "-")
  87       OutputFile = "a.out.dwarf";
  88     else
  89       OutputFile = InputFile + ".dwarf";
  90   } else {
  91     OutputFile = OutputFileOpt;
  92   }
  93
  94   return !linkDwarf(OutputFile, **DebugMapPtrOrErr, Options);
  95 }