C++ Error::SetErrorStringWithFormat方法代码示例

Error
PlatformRemoteGDBServer::ConnectRemote (Args& args)
{
    Error error;
    if (IsConnected())
    {
        error.SetErrorStringWithFormat ("the platform is already connected to '%s', execute 'platform disconnect' to close the current connection", 
                                        GetHostname());
    }
    else
    {
        if (args.GetArgumentCount() == 1)
        {
            const char *url = args.GetArgumentAtIndex(0);
            m_gdb_client.SetConnection (new ConnectionFileDescriptor());
            const ConnectionStatus status = m_gdb_client.Connect(url, &error);
            if (status == eConnectionStatusSuccess)
            {
                if (m_gdb_client.HandshakeWithServer(&error))
                {
                    m_gdb_client.GetHostInfo();
                    // If a working directory was set prior to connecting, send it down now
                    if (m_working_dir)
                        m_gdb_client.SetWorkingDir(m_working_dir.GetCString());
                }
                else
                {
                    m_gdb_client.Disconnect();
                    if (error.Success())
                        error.SetErrorString("handshake failed");
                }
            }
        }
        else
        {
            error.SetErrorString ("\"platform connect\" takes a single argument: <connect-url>");
        }
    }

    return error;
}

Error
PlatformiOSSimulator::GetSymbolFile (const FileSpec &platform_file, 
                                     const UUID *uuid_ptr,
                                     FileSpec &local_file)
{
    Error error;
    char platform_file_path[PATH_MAX];
    if (platform_file.GetPath(platform_file_path, sizeof(platform_file_path)))
    {
        char resolved_path[PATH_MAX];
    
        const char * sdk_dir = GetSDKsDirectory();
        if (sdk_dir)
        {
            ::snprintf (resolved_path, 
                        sizeof(resolved_path), 
                        "%s/%s", 
                        sdk_dir, 
                        platform_file_path);
            
            // First try in the SDK and see if the file is in there
            local_file.SetFile(resolved_path, true);
            if (local_file.Exists())
                return error;

            // Else fall back to the actual path itself
            local_file.SetFile(platform_file_path, true);
            if (local_file.Exists())
                return error;

        }
        error.SetErrorStringWithFormat ("unable to locate a platform file for '%s' in platform '%s'", 
                                        platform_file_path,
                                        GetPluginName().GetCString());
    }
    else
    {
        error.SetErrorString ("invalid platform file argument");
    }
    return error;
}

Error
OptionValueUInt64::SetValueFromCString (const char *value_cstr, VarSetOperationType op)
{
    Error error;
    switch (op)
    {
        case eVarSetOperationClear:
            Clear ();
            NotifyValueChanged();
            break;
            
        case eVarSetOperationReplace:
        case eVarSetOperationAssign:
        {
            bool success = false;
            uint64_t value = Args::StringToUInt64 (value_cstr, 0, 0, &success);
            if (success)
            {
                m_value_was_set = true;
                m_current_value = value;
                NotifyValueChanged();
            }
            else
            {
                error.SetErrorStringWithFormat ("invalid uint64_t string value: '%s'", value_cstr);
            }
        }
            break;
            
        case eVarSetOperationInsertBefore:
        case eVarSetOperationInsertAfter:
        case eVarSetOperationRemove:
        case eVarSetOperationAppend:
        case eVarSetOperationInvalid:
            error = OptionValue::SetValueFromCString (value_cstr, op);
            break;
    }
    return error;
}

        virtual Error
        SetOptionValue (uint32_t option_idx, const char *option_arg)
        {
            Error error;
            const int short_option = m_getopt_table[option_idx].val;

            switch (short_option)
            {
                case 'c':
                    if (option_arg != NULL)
                        m_condition.assign (option_arg);
                    else
                        m_condition.clear();
                    m_condition_passed = true;
                    break;
                default:
                    error.SetErrorStringWithFormat ("unrecognized option '%c'", short_option);
                    break;
            }

            return error;
        }

ModuleLock::ModuleLock(const FileSpec &root_dir_spec, const UUID &uuid,
                       Error &error) {
  const auto lock_dir_spec = JoinPath(root_dir_spec, kLockDirName);
  error = MakeDirectory(lock_dir_spec);
  if (error.Fail())
    return;

  m_file_spec = JoinPath(lock_dir_spec, uuid.GetAsString().c_str());
  m_file.Open(m_file_spec.GetCString(), File::eOpenOptionWrite |
                                            File::eOpenOptionCanCreate |
                                            File::eOpenOptionCloseOnExec);
  if (!m_file) {
    error.SetErrorToErrno();
    return;
  }

  m_lock.reset(new lldb_private::LockFile(m_file.GetDescriptor()));
  error = m_lock->WriteLock(0, 1);
  if (error.Fail())
    error.SetErrorStringWithFormat("Failed to lock file: %s",
                                   error.AsCString());
}

        virtual Error
        SetOptionValue (CommandInterpreter &interpreter,
                        uint32_t option_idx,
                        const char *option_value)
        {
            Error error;
            const int short_option = g_option_table[option_idx].short_option;
            switch (short_option)
            {
                case 's':
                    {
                        OptionValueSP value_sp (OptionValueUInt64::Create (option_value, error));
                        if (value_sp)
                            set_indexes.AppendValue (value_sp);
                    }
                    break;

                case 'a':
                    // When we don't use OptionValue::SetValueFromCString(const char *) to 
                    // set an option value, it won't be marked as being set in the options
                    // so we make a call to let users know the value was set via option
                    dump_all_sets.SetCurrentValue (true);
                    dump_all_sets.SetOptionWasSet ();
                    break;

                case 'A':
                    // When we don't use OptionValue::SetValueFromCString(const char *) to 
                    // set an option value, it won't be marked as being set in the options
                    // so we make a call to let users know the value was set via option
                    alternate_name.SetCurrentValue (true);
                    dump_all_sets.SetOptionWasSet ();
                    break;
                    
                default:
                    error.SetErrorStringWithFormat("unrecognized short option '%c'", short_option);
                    break;
            }
            return error;
        }

SBError
SBDebugger::SetInternalVariable (const char *var_name, const char *value, const char *debugger_instance_name)
{
    SBError sb_error;
    DebuggerSP debugger_sp(Debugger::FindDebuggerWithInstanceName (ConstString(debugger_instance_name)));
    Error error;
    if (debugger_sp)
    {
        ExecutionContext exe_ctx (debugger_sp->GetCommandInterpreter().GetExecutionContext());
        error = debugger_sp->SetPropertyValue (&exe_ctx,
                                               eVarSetOperationAssign,
                                               var_name,
                                               value);
    }
    else
    {
        error.SetErrorStringWithFormat ("invalid debugger instance name '%s'", debugger_instance_name);
    }
    if (error.Fail())
        sb_error.SetError(error);
    return sb_error;
}

Error
OptionGroupUUID::SetOptionValue (CommandInterpreter &interpreter,
                                 uint32_t option_idx,
                                 const char *option_arg)
{
    Error error;
    const int short_option = g_option_table[option_idx].short_option;

    switch (short_option)
    {
        case 'u':
            error = m_uuid.SetValueFromString (option_arg);
            if (error.Success())
                m_uuid.SetOptionWasSet();
            break;

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

    return error;
}

        virtual Error
        SetOptionValue (uint32_t option_idx, const char *option_arg)
        {
            Error error;
            char short_option = (char) m_getopt_table[option_idx].val;

            switch (short_option)
            {
            case 'f':  log_file = option_arg;                                 break;
            case 't':  log_options |= LLDB_LOG_OPTION_THREADSAFE;             break;
            case 'v':  log_options |= LLDB_LOG_OPTION_VERBOSE;                break;
            case 'g':  log_options |= LLDB_LOG_OPTION_DEBUG;                  break;
            case 's':  log_options |= LLDB_LOG_OPTION_PREPEND_SEQUENCE;       break;
            case 'T':  log_options |= LLDB_LOG_OPTION_PREPEND_TIMESTAMP;      break;
            case 'p':  log_options |= LLDB_LOG_OPTION_PREPEND_PROC_AND_THREAD;break;
            case 'n':  log_options |= LLDB_LOG_OPTION_PREPEND_THREAD_NAME;    break;
            default:
                error.SetErrorStringWithFormat ("unrecognized option '%c'", short_option);
                break;
            }

            return error;
        }

uint32_t
CommunicationKDP::SendRequestWriteMemory (lldb::addr_t addr,
        const void *src,
        uint32_t src_len,
        Error &error)
{
    PacketStreamType request_packet (Stream::eBinary, m_addr_byte_size, m_byte_order);
    bool use_64 = (GetVersion() >= 11);
    uint32_t command_addr_byte_size = use_64 ? 8 : 4;
    const CommandType command = use_64 ? KDP_WRITEMEM64 : KDP_WRITEMEM;
    // Size is header + address size + uint32_t length
    const uint32_t command_length = 8 + command_addr_byte_size + 4 + src_len;
    const uint32_t request_sequence_id = m_request_sequence_id;
    MakeRequestPacketHeader (command, request_packet, command_length);
    request_packet.PutMaxHex64 (addr, command_addr_byte_size);
    request_packet.PutHex32 (src_len);
    request_packet.PutRawBytes(src, src_len);

    DataExtractor reply_packet;
    if (SendRequestAndGetReply (command, request_sequence_id, request_packet, reply_packet))
    {
        uint32_t offset = 8;
        uint32_t kdp_error = reply_packet.GetU32 (&offset);
        if (kdp_error)
            error.SetErrorStringWithFormat ("kdp write memory failed (error %u)", kdp_error);
        else
        {
            error.Clear();
            return src_len;
        }
    }
    else
    {
        error.SetErrorString ("failed to send packet");
    }
    return 0;
}

Error
PlatformFreeBSD::ConnectRemote (Args& args)
{
    Error error;
    if (IsHost())
    {
        error.SetErrorStringWithFormat ("can't connect to the host platform '%s', always connected", GetPluginName().GetCString());
    }
    else
    {
        if (!m_remote_platform_sp)
            m_remote_platform_sp = Platform::Create (ConstString("remote-gdb-server"), error);

        if (m_remote_platform_sp)
        {
            if (error.Success())
            {
                if (m_remote_platform_sp)
                {
                    error = m_remote_platform_sp->ConnectRemote (args);
                }
                else
                {
                    error.SetErrorString ("\"platform connect\" takes a single argument: <connect-url>");
                }
            }
        }
        else
            error.SetErrorString ("failed to create a 'remote-gdb-server' platform");

        if (error.Fail())
            m_remote_platform_sp.reset();
    }

    return error;
}

void
IRMemoryMap::ReadScalarFromMemory (Scalar &scalar, lldb::addr_t process_address, size_t size, Error &error)
{
    error.Clear();
    
    if (size > 0)
    {
        DataBufferHeap buf(size, 0);
        ReadMemory(buf.GetBytes(), process_address, size, error);
        
        if (!error.Success())
            return;
        
        DataExtractor extractor(buf.GetBytes(), buf.GetByteSize(), GetByteOrder(), GetAddressByteSize());
        
        lldb::offset_t offset = 0;
        
        switch (size)
        {
        default:
            error.SetErrorToGenericError();
            error.SetErrorStringWithFormat("Couldn't read scalar: unsupported size %" PRIu64, (uint64_t)size);
            return;
        case 1: scalar = extractor.GetU8(&offset);  break;
        case 2: scalar = extractor.GetU16(&offset); break;
        case 4: scalar = extractor.GetU32(&offset); break;
        case 8: scalar = extractor.GetU64(&offset); break;
        }
    }
    else
    {
        error.SetErrorToGenericError();
        error.SetErrorString ("Couldn't read scalar: its size was zero");
    }
    return;
}

lldb_private::Error
OptionGroupPlatformSSH::SetOptionValue (CommandInterpreter &interpreter,
                                          uint32_t option_idx,
                                          const char *option_arg)
{
    Error error;
    char short_option = (char) GetDefinitions()[option_idx].short_option;
    switch (short_option)
    {
        case 's':
            m_ssh = true;
            break;
            
        case 'S':
            m_ssh_opts.assign(option_arg);
            break;
            
        default:
            error.SetErrorStringWithFormat ("unrecognized option '%c'", short_option);
            break;
    }
    
    return error;
}

size_t
ProcessMachCore::DoReadMemory (addr_t addr, void *buf, size_t size, Error &error)
{
    ObjectFile *core_objfile = m_core_module_sp->GetObjectFile();

    if (core_objfile)
    {
        const VMRangeToFileOffset::Entry *core_memory_entry = m_core_aranges.FindEntryThatContains (addr);
        if (core_memory_entry)
        {
            const addr_t offset = addr - core_memory_entry->GetRangeBase();
            const addr_t bytes_left = core_memory_entry->GetRangeEnd() - addr;
            size_t bytes_to_read = size;
            if (bytes_to_read > bytes_left)
                bytes_to_read = bytes_left;
            return core_objfile->CopyData (core_memory_entry->data.GetRangeBase() + offset, bytes_to_read, buf);
        }
        else
        {
            error.SetErrorStringWithFormat ("core file does not contain 0x%" PRIx64, addr);
        }
    }
    return 0;
}

Error
FileSystem::DeleteDirectory(const FileSpec &file_spec, bool recurse)
{
    Error error;
    std::wstring path_buffer;
    if (!llvm::ConvertUTF8toWide(file_spec.GetPath(), path_buffer))
    {
        error.SetErrorString(PATH_CONVERSION_ERROR);
        return error;
    }
    if (!recurse)
    {
        BOOL result = ::RemoveDirectoryW(path_buffer.c_str());
        if (!result)
            error.SetError(::GetLastError(), lldb::eErrorTypeWin32);
    }
    else
    {
        // SHFileOperation() accepts a list of paths, and so must be double-null-terminated to
        // indicate the end of the list. The first null terminator is there only in the backing
        // store but not the actual vector contents, and so we need to push twice.
        path_buffer.push_back(0);
        path_buffer.push_back(0);

        SHFILEOPSTRUCTW shfos = {0};
        shfos.wFunc = FO_DELETE;
        shfos.pFrom = (LPCWSTR)path_buffer.data();
        shfos.fFlags = FOF_NO_UI;

        int result = ::SHFileOperationW(&shfos);
        // TODO(zturner): Correctly handle the intricacies of SHFileOperation return values.
        if (result != 0)
            error.SetErrorStringWithFormat("SHFileOperation failed");
    }
    return error;
}