C++ Status::SetErrorStringWithFormatv方法代码示例

Status
OptionGroupPlatform::SetOptionValue(uint32_t option_idx,
                                    llvm::StringRef option_arg,
                                    ExecutionContext *execution_context) {
  Status error;
  if (!m_include_platform_option)
    ++option_idx;

  const int short_option = g_option_table[option_idx].short_option;

  switch (short_option) {
  case 'p':
    m_platform_name.assign(option_arg);
    break;

  case 'v':
    if (m_os_version.tryParse(option_arg))
      error.SetErrorStringWithFormatv("invalid version string '{0}'",
                                      option_arg);
    break;

  case 'b':
    m_sdk_build.SetString(option_arg);
    break;

  case 'S':
    m_sdk_sysroot.SetString(option_arg);
    break;

  default:
    error.SetErrorStringWithFormat("unrecognized option '%c'", short_option);
    break;
  }
  return error;
}

SearchFilterSP SearchFilter::CreateFromStructuredData(
    Target &target, const StructuredData::Dictionary &filter_dict,
    Status &error) {
  SearchFilterSP result_sp;
  if (!filter_dict.IsValid()) {
    error.SetErrorString("Can't deserialize from an invalid data object.");
    return result_sp;
  }

  llvm::StringRef subclass_name;

  bool success = filter_dict.GetValueForKeyAsString(
      GetSerializationSubclassKey(), subclass_name);
  if (!success) {
    error.SetErrorStringWithFormat("Filter data missing subclass key");
    return result_sp;
  }

  FilterTy filter_type = NameToFilterTy(subclass_name);
  if (filter_type == UnknownFilter) {
    error.SetErrorStringWithFormatv("Unknown filter type: {0}.", subclass_name);
    return result_sp;
  }

  StructuredData::Dictionary *subclass_options = nullptr;
  success = filter_dict.GetValueForKeyAsDictionary(
      GetSerializationSubclassOptionsKey(), subclass_options);
  if (!success || !subclass_options || !subclass_options->IsValid()) {
    error.SetErrorString("Filter data missing subclass options key.");
    return result_sp;
  }

  switch (filter_type) {
  case Unconstrained:
    result_sp = SearchFilterForUnconstrainedSearches::CreateFromStructuredData(
        target, *subclass_options, error);
    break;
  case ByModule:
    result_sp = SearchFilterByModule::CreateFromStructuredData(
        target, *subclass_options, error);
    break;
  case ByModules:
    result_sp = SearchFilterByModuleList::CreateFromStructuredData(
        target, *subclass_options, error);
    break;
  case ByModulesAndCU:
    result_sp = SearchFilterByModuleListAndCU::CreateFromStructuredData(
        target, *subclass_options, error);
    break;
  case Exception:
    error.SetErrorString("Can't serialize exception breakpoints yet.");
    break;
  default:
    llvm_unreachable("Should never get an uresolvable filter type.");
  }

  return result_sp;
}

bool Breakpoint::AddName(llvm::StringRef new_name, Status &error) {
  if (new_name.empty())
    return false;
  if (!BreakpointID::StringIsBreakpointName(new_name, error)) {
    error.SetErrorStringWithFormatv("input name \"{0}\" not a breakpoint name.",
                                    new_name);
    return false;
  }
  if (!error.Success())
    return false;

  m_name_list.insert(new_name);
  return true;
}

StructuredData::ObjectSP
StructuredData::ParseJSONFromFile(const FileSpec &input_spec, Status &error) {
  StructuredData::ObjectSP return_sp;

  auto buffer_or_error = llvm::MemoryBuffer::getFile(input_spec.GetPath());
  if (!buffer_or_error) {
    error.SetErrorStringWithFormatv("could not open input file: {0} - {1}.",
                                    input_spec.GetPath(),
                                    buffer_or_error.getError().message());
    return return_sp;
  }

  JSONParser json_parser(buffer_or_error.get()->getBuffer());
  return_sp = ParseJSONValue(json_parser);
  return return_sp;
}

HostProcess
ProcessLauncherPosixFork::LaunchProcess(const ProcessLaunchInfo &launch_info,
                                        Status &error) {
  char exe_path[PATH_MAX];
  launch_info.GetExecutableFile().GetPath(exe_path, sizeof(exe_path));

  // A pipe used by the child process to report errors.
  PipePosix pipe;
  const bool child_processes_inherit = false;
  error = pipe.CreateNew(child_processes_inherit);
  if (error.Fail())
    return HostProcess();

  ::pid_t pid = ::fork();
  if (pid == -1) {
    // Fork failed
    error.SetErrorStringWithFormatv("Fork failed with error message: {0}",
                                    llvm::sys::StrError());
    return HostProcess(LLDB_INVALID_PROCESS_ID);
  }
  if (pid == 0) {
    // child process
    pipe.CloseReadFileDescriptor();
    ChildFunc(pipe.ReleaseWriteFileDescriptor(), launch_info);
  }

  // parent process

  pipe.CloseWriteFileDescriptor();
  char buf[1000];
  int r = read(pipe.GetReadFileDescriptor(), buf, sizeof buf);

  if (r == 0)
    return HostProcess(pid); // No error. We're done.

  error.SetErrorString(buf);

  llvm::sys::RetryAfterSignal(-1, waitpid, pid, nullptr, 0);

  return HostProcess();
}

BreakpointResolverSP BreakpointResolver::CreateFromStructuredData(
    const StructuredData::Dictionary &resolver_dict, Status &error) {
  BreakpointResolverSP result_sp;
  if (!resolver_dict.IsValid()) {
    error.SetErrorString("Can't deserialize from an invalid data object.");
    return result_sp;
  }

  llvm::StringRef subclass_name;

  bool success = resolver_dict.GetValueForKeyAsString(
      GetSerializationSubclassKey(), subclass_name);

  if (!success) {
    error.SetErrorStringWithFormat(
        "Resolver data missing subclass resolver key");
    return result_sp;
  }

  ResolverTy resolver_type = NameToResolverTy(subclass_name);
  if (resolver_type == UnknownResolver) {
    error.SetErrorStringWithFormatv("Unknown resolver type: {0}.",
                                    subclass_name);
    return result_sp;
  }

  StructuredData::Dictionary *subclass_options = nullptr;
  success = resolver_dict.GetValueForKeyAsDictionary(
      GetSerializationSubclassOptionsKey(), subclass_options);
  if (!success || !subclass_options || !subclass_options->IsValid()) {
    error.SetErrorString("Resolver data missing subclass options key.");
    return result_sp;
  }

  lldb::addr_t offset;
  success = subclass_options->GetValueForKeyAsInteger(
      GetKey(OptionNames::Offset), offset);
  if (!success) {
    error.SetErrorString("Resolver data missing offset options key.");
    return result_sp;
  }

  BreakpointResolver *resolver;

  switch (resolver_type) {
  case FileLineResolver:
    resolver = BreakpointResolverFileLine::CreateFromStructuredData(
        nullptr, *subclass_options, error);
    break;
  case AddressResolver:
    resolver = BreakpointResolverAddress::CreateFromStructuredData(
        nullptr, *subclass_options, error);
    break;
  case NameResolver:
    resolver = BreakpointResolverName::CreateFromStructuredData(
        nullptr, *subclass_options, error);
    break;
  case FileRegexResolver:
    resolver = BreakpointResolverFileRegex::CreateFromStructuredData(
        nullptr, *subclass_options, error);
    break;
  case PythonResolver:
    resolver = BreakpointResolverScripted::CreateFromStructuredData(
        nullptr, *subclass_options, error);
    break;
  case ExceptionResolver:
    error.SetErrorString("Exception resolvers are hard.");
    break;
  default:
    llvm_unreachable("Should never get an unresolvable resolver type.");
  }

  if (!error.Success()) {
    return result_sp;
  } else {
    // Add on the global offset option:
    resolver->SetOffset(offset);
    return BreakpointResolverSP(resolver);
  }
}