C++ DILineInfo::getFunctionName方法代码示例

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';
}

void lookup_pointer(DIContext *context, const char **name, size_t *line, const char **filename, size_t pointer, int demangle, int *fromC)
{
    DILineInfo info;
    if (demangle && *name != NULL)
        *name = jl_demangle(*name);
    #ifdef LLVM35
    DILineInfoSpecifier infoSpec(DILineInfoSpecifier::FileLineInfoKind::AbsoluteFilePath,
                                 DILineInfoSpecifier::FunctionNameKind::ShortName);
    #else
    int infoSpec = DILineInfoSpecifier::FileLineInfo |
                   DILineInfoSpecifier::AbsoluteFilePath |
                   DILineInfoSpecifier::FunctionName;
    #endif
    if (context == NULL) goto done;
    info = context->getLineInfoForAddress(pointer, infoSpec);
    #ifndef LLVM35 // LLVM <= 3.4
    if (strcmp(info.getFunctionName(), "<invalid>") == 0) goto done;
    if (demangle)
        *name = jl_demangle(info.getFunctionName());
    else
        *name = strdup(info.getFunctionName());
    *line = info.getLine();
    *filename = strdup(info.getFileName());
    #else
    if (strcmp(info.FunctionName.c_str(), "<invalid>") == 0) goto done;
    *name = strdup(info.FunctionName.c_str());
    *line = info.Line;
    *filename = strdup(info.FileName.c_str());
    #endif
    done:
    // If this is a jlcall wrapper, set fromC to match JIT behavior
    if (*name == NULL || memcmp(*name,"jlcall_",7) == 0)
        *fromC = true;
}

void lookup_pointer(DIContext *context, const char **name, int *line, const char **filename, size_t pointer, int demangle)
{
    if (context == NULL) return;
    #ifdef LLVM35
    DILineInfoSpecifier infoSpec(DILineInfoSpecifier::FileLineInfoKind::AbsoluteFilePath,
                                 DILineInfoSpecifier::FunctionNameKind::ShortName);
    #else
    int infoSpec = DILineInfoSpecifier::FileLineInfo |
                   DILineInfoSpecifier::AbsoluteFilePath |
                   DILineInfoSpecifier::FunctionName;
    #endif
    DILineInfo info = context->getLineInfoForAddress(pointer, infoSpec);

    #ifndef LLVM35 // LLVM <= 3.4
    if (strcmp(info.getFunctionName(), "<invalid>") == 0) return;
    if (demangle)
	*name = jl_demangle(info.getFunctionName());
    else
	*name = strdup(info.getFunctionName());
    *line = info.getLine();
    *filename = strdup(info.getFileName());
    #else
    if (strcmp(info.FunctionName.c_str(), "<invalid>") == 0) return;
    *name = strdup(info.FunctionName.c_str());
    *line = info.Line;
    *filename = strdup(info.FileName.c_str());
    #endif
}

std::string LLVMSymbolizer::printDILineInfo(DILineInfo LineInfo) const {
  // By default, DILineInfo contains "<invalid>" for function/filename it
  // cannot fetch. We replace it to "??" to make our output closer to addr2line.
  static const std::string kDILineInfoBadString = "<invalid>";
  std::stringstream Result;
  if (Opts.PrintFunctions) {
    std::string FunctionName = LineInfo.getFunctionName();
    if (FunctionName == kDILineInfoBadString)
      FunctionName = kBadString;
    DemangleName(FunctionName);
    Result << FunctionName << "\n";
  }
  std::string Filename = LineInfo.getFileName();
  if (Filename == kDILineInfoBadString)
    Filename = kBadString;
  Result << Filename << ":" << LineInfo.getLine()
                     << ":" << LineInfo.getColumn() << "\n";
  return Result.str();
}

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;

  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;
  }

  OwningPtr<DIContext> dictx(DIContext::getDWARFContext(/*FIXME*/true,
                                                        DebugInfoSection,
                                                        DebugAbbrevSection,
                                                        DebugArangesSection,
                                                        DebugLineSection,
                                                        DebugStringSection));
  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 spec_flags = DILineInfoSpecifier::FileLineInfo;
    if (PrintFunctions)
      spec_flags |= DILineInfoSpecifier::FunctionName;
    DILineInfo dli = dictx->getLineInfoForAddress(Address, spec_flags);
    if (PrintFunctions)
      outs() << (dli.getFunctionName() ? dli.getFunctionName() : "<unknown>")
             << "\n";
    outs() << (dli.getFileName() ? dli.getFileName() : "<unknown>") << ':'
           << dli.getLine() << ':' << dli.getColumn() << '\n';
  }
}