llvm.org GIT mirror llvm / 5eae90d tools / llvm-dwarfdump / llvm-dwarfdump.cpp
5eae90d

Tree @5eae90d (Download .tar.gz)

llvm-dwarfdump.cpp @5eae90d

72c0d7f
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
6b3ae46
 
 
 
3e25c4a
 
 
 
 
5eae90d
 
 
 
 
 
 
 
 
 
 
 
72c0d7f
 
 
 
 
 
 
 
 
 
 
 
 
358f4fd
34f864f
eceb5b9
72c0d7f
 
2099039
 
 
72c0d7f
 
 
 
1c0b24f
 
 
 
 
72c0d7f
1c0b24f
72c0d7f
1c0b24f
72c0d7f
1c0b24f
358f4fd
34f864f
 
eceb5b9
 
72c0d7f
 
 
 
358f4fd
b848e97
34f864f
eceb5b9
 
6b3ae46
 
 
 
 
 
 
5eae90d
 
3e25c4a
5eae90d
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
6b3ae46
72c0d7f
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
//===-- llvm-dwarfdump.cpp - Debug info dumping utility for llvm -----------===//
//
//                     The LLVM Compiler Infrastructure
//
// 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 "dwarfdump".
//
//===----------------------------------------------------------------------===//

#include "llvm/ADT/OwningPtr.h"
#include "llvm/ADT/Triple.h"
#include "llvm/ADT/STLExtras.h"
#include "llvm/Object/ObjectFile.h"
#include "llvm/DebugInfo/DIContext.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/Format.h"
#include "llvm/Support/ManagedStatic.h"
#include "llvm/Support/MemoryBuffer.h"
#include "llvm/Support/MemoryObject.h"
#include "llvm/Support/PrettyStackTrace.h"
#include "llvm/Support/Signals.h"
#include "llvm/Support/raw_ostream.h"
#include "llvm/Support/system_error.h"
#include <algorithm>
#include <cstring>
using namespace llvm;
using namespace object;

static cl::list<std::string>
InputFilenames(cl::Positional, cl::desc("<input object files>"),
               cl::ZeroOrMore);

static cl::opt<unsigned long long>
Address("address", cl::init(-1ULL),
        cl::desc("Print line information for a given address"));

static cl::opt<bool>
PrintFunctions("functions", cl::init(false),
               cl::desc("Print function names as well as line information "
                        "for a given address"));

static cl::opt<bool>
PrintInlining("inlining", cl::init(false),
              cl::desc("Print all inlined frames for a given address"));

static void PrintDILineInfo(DILineInfo dli) {
  if (PrintFunctions)
    outs() << (dli.getFunctionName() ? dli.getFunctionName() : "<unknown>")
           << "\n";
  outs() << (dli.getFileName() ? dli.getFileName() : "<unknown>") << ':'
         << dli.getLine() << ':' << dli.getColumn() << '\n';
}

static void DumpInput(const StringRef &Filename) {
  OwningPtr<MemoryBuffer> Buff;

  if (error_code ec = MemoryBuffer::getFileOrSTDIN(Filename, Buff)) {
    errs() << Filename << ": " << ec.message() << "\n";
    return;
  }

  OwningPtr<ObjectFile> Obj(ObjectFile::createObjectFile(Buff.take()));

  StringRef DebugInfoSection;
  StringRef DebugAbbrevSection;
  StringRef DebugLineSection;
  StringRef DebugArangesSection;
  StringRef DebugStringSection;
  StringRef DebugRangesSection;

  error_code ec;
  for (section_iterator i = Obj->begin_sections(),
                        e = Obj->end_sections();
                        i != e; i.increment(ec)) {
    StringRef name;
    i->getName(name);
    StringRef data;
    i->getContents(data);

    if (name.startswith("__DWARF,"))
      name = name.substr(8); // Skip "__DWARF," prefix.
    name = name.substr(name.find_first_not_of("._")); // Skip . and _ prefixes.
    if (name == "debug_info")
      DebugInfoSection = data;
    else if (name == "debug_abbrev")
      DebugAbbrevSection = data;
    else if (name == "debug_line")
      DebugLineSection = data;
    else if (name == "debug_aranges")
      DebugArangesSection = data;
    else if (name == "debug_str")
      DebugStringSection = data;
    else if (name == "debug_ranges")
      DebugRangesSection = data;
  }

  OwningPtr<DIContext> dictx(DIContext::getDWARFContext(/*FIXME*/true,
                                                        DebugInfoSection,
                                                        DebugAbbrevSection,
                                                        DebugArangesSection,
                                                        DebugLineSection,
                                                        DebugStringSection,
                                                        DebugRangesSection));
  if (Address == -1ULL) {
    outs() << Filename
           << ":\tfile format " << Obj->getFileFormatName() << "\n\n";
    // Dump the complete DWARF structure.
    dictx->dump(outs());
  } else {
    // Print line info for the specified address.
    int SpecFlags = DILineInfoSpecifier::FileLineInfo |
                    DILineInfoSpecifier::AbsoluteFilePath;
    if (PrintFunctions)
      SpecFlags |= DILineInfoSpecifier::FunctionName;
    if (PrintInlining) {
      DIInliningInfo InliningInfo = dictx->getInliningInfoForAddress(
          Address, SpecFlags);
      uint32_t n = InliningInfo.getNumberOfFrames();
      if (n == 0) {
        // Print one empty debug line info in any case.
        PrintDILineInfo(DILineInfo());
      } else {
        for (uint32_t i = 0; i < n; i++) {
          DILineInfo dli = InliningInfo.getFrame(i);
          PrintDILineInfo(dli);
        }
      }
    } else {
      DILineInfo dli = dictx->getLineInfoForAddress(Address, SpecFlags);
      PrintDILineInfo(dli);
    }
  }
}

int main(int argc, char **argv) {
  // 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 dwarf dumper\n");

  // Defaults to a.out if no filenames specified.
  if (InputFilenames.size() == 0)
    InputFilenames.push_back("a.out");

  std::for_each(InputFilenames.begin(), InputFilenames.end(), DumpInput);

  return 0;
}