tools/llvm-dwarfdump/llvm-dwarfdump.cpp

   1 //===-- llvm-dwarfdump.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 works like "dwarfdump".
  11 //
  12 //===----------------------------------------------------------------------===//
  13
  14 #include "llvm/ADT/OwningPtr.h"
  15 #include "llvm/ADT/Triple.h"
  16 #include "llvm/ADT/STLExtras.h"
  17 #include "llvm/Object/ObjectFile.h"
  18 #include "llvm/DebugInfo/DIContext.h"
  19 #include "llvm/Support/CommandLine.h"
  20 #include "llvm/Support/Debug.h"
  21 #include "llvm/Support/Format.h"
  22 #include "llvm/Support/ManagedStatic.h"
  23 #include "llvm/Support/MemoryBuffer.h"
  24 #include "llvm/Support/MemoryObject.h"
  25 #include "llvm/Support/PrettyStackTrace.h"
  26 #include "llvm/Support/Signals.h"
  27 #include "llvm/Support/raw_ostream.h"
  28 #include "llvm/Support/system_error.h"
  29 #include <algorithm>
  30 #include <cstring>
  31 using namespace llvm;
  32 using namespace object;
  33
  34 static cl::list<std::string>
  35 InputFilenames(cl::Positional, cl::desc("<input object files>"),
  36                cl::ZeroOrMore);
  37
  38 static void DumpInput(const StringRef &Filename) {
  39   OwningPtr<MemoryBuffer> Buff;
  40
  41   if (error_code ec = MemoryBuffer::getFileOrSTDIN(Filename, Buff)) {
  42     errs() << Filename << ": " << ec.message() << "\n";
  43     return;
  44   }
  45
  46   OwningPtr<ObjectFile> Obj(ObjectFile::createObjectFile(Buff.take()));
  47
  48   outs() << '\n';
  49   outs() << Filename
  50          << ":\tfile format " << Obj->getFileFormatName() << "\n\n";
  51
  52   StringRef DebugInfoSection;
  53   StringRef DebugAbbrevSection;
  54   StringRef DebugLineSection;
  55   StringRef DebugArangesSection;
  56
  57   error_code ec;
  58   for (ObjectFile::section_iterator i = Obj->begin_sections(),
  59                                     e = Obj->end_sections();
  60                                     i != e; i.increment(ec)) {
  61     StringRef name;
  62     i->getName(name);
  63     StringRef data;
  64     i->getContents(data);
  65     if (name.endswith("debug_info"))
  66       DebugInfoSection = data;
  67     else if (name.endswith("debug_abbrev"))
  68       DebugAbbrevSection = data;
  69     else if (name.endswith("debug_line"))
  70       DebugLineSection = data;
  71     else if (name.endswith("debug_aranges"))
  72       DebugArangesSection = data;
  73   }
  74
  75   OwningPtr<DIContext> dictx(DIContext::getDWARFContext(/*FIXME*/true,
  76                                                         DebugInfoSection,
  77                                                         DebugAbbrevSection,
  78                                                         DebugArangesSection));
  79   dictx->dump(outs());
  80 }
  81
  82 int main(int argc, char **argv) {
  83   // Print a stack trace if we signal out.
  84   sys::PrintStackTraceOnErrorSignal();
  85   PrettyStackTraceProgram X(argc, argv);
  86   llvm_shutdown_obj Y;  // Call llvm_shutdown() on exit.
  87
  88   cl::ParseCommandLineOptions(argc, argv, "llvm dwarf dumper\n");
  89
  90   // Defaults to a.out if no filenames specified.
  91   if (InputFilenames.size() == 0)
  92     InputFilenames.push_back("a.out");
  93
  94   std::for_each(InputFilenames.begin(), InputFilenames.end(), DumpInput);
  95
  96   return 0;
  97 }