C++ Status::Success方法代码示例

  void DumpToLog(IRMemoryMap &map, lldb::addr_t process_address,
                 Log *log) override {
    StreamString dump_stream;

    Status err;

    const lldb::addr_t load_addr = process_address + m_offset;

    dump_stream.Printf("0x%" PRIx64 ": EntityPersistentVariable (%s)\n",
                       load_addr,
                       m_persistent_variable_sp->GetName().AsCString());

    {
      dump_stream.Printf("Pointer:\n");

      DataBufferHeap data(m_size, 0);

      map.ReadMemory(data.GetBytes(), load_addr, m_size, err);

      if (!err.Success()) {
        dump_stream.Printf("  <could not be read>\n");
      } else {
        DumpHexBytes(&dump_stream, data.GetBytes(), data.GetByteSize(), 16,
                     load_addr);

        dump_stream.PutChar('\n');
      }
    }

    {
      dump_stream.Printf("Target:\n");

      lldb::addr_t target_address;

      map.ReadPointerFromMemory(&target_address, load_addr, err);

      if (!err.Success()) {
        dump_stream.Printf("  <could not be read>\n");
      } else {
        DataBufferHeap data(m_persistent_variable_sp->GetByteSize(), 0);

        map.ReadMemory(data.GetBytes(), target_address,
                       m_persistent_variable_sp->GetByteSize(), err);

        if (!err.Success()) {
          dump_stream.Printf("  <could not be read>\n");
        } else {
          DumpHexBytes(&dump_stream, data.GetBytes(), data.GetByteSize(), 16,
                       target_address);

          dump_stream.PutChar('\n');
        }
      }
    }

    log->PutString(dump_stream.GetString());
  }

Status NativeRegisterContextLinux_mips64::WriteAllRegisterValues(
    const lldb::DataBufferSP &data_sp) {
  Status error;

  if (!data_sp) {
    error.SetErrorStringWithFormat(
        "NativeRegisterContextLinux_mips64::%s invalid data_sp provided",
        __FUNCTION__);
    return error;
  }

  if (data_sp->GetByteSize() != REG_CONTEXT_SIZE) {
    error.SetErrorStringWithFormat(
        "NativeRegisterContextLinux_mips64::%s data_sp contained mismatched "
        "data size, expected %" PRIu64 ", actual %" PRIu64,
        __FUNCTION__, REG_CONTEXT_SIZE, data_sp->GetByteSize());
    return error;
  }

  uint8_t *src = data_sp->GetBytes();
  if (src == nullptr) {
    error.SetErrorStringWithFormat("NativeRegisterContextLinux_mips64::%s "
                                   "DataBuffer::GetBytes() returned a null "
                                   "pointer",
                                   __FUNCTION__);
    return error;
  }

  ::memcpy(&m_gpr, src, GetRegisterInfoInterface().GetGPRSize());
  src += GetRegisterInfoInterface().GetGPRSize();

  ::memcpy(&m_fpr, src, GetFPRSize());
  src += GetFPRSize();

  ::memcpy(&m_msa, src, sizeof(MSA_linux_mips));

  error = WriteGPR();
  if (!error.Success()) {
    error.SetErrorStringWithFormat(
        "NativeRegisterContextLinux_mips64::%s WriteGPR() failed",
        __FUNCTION__);
    return error;
  }

  error = WriteCP1();
  if (!error.Success()) {
    error.SetErrorStringWithFormat(
        "NativeRegisterContextLinux_mips64::%s WriteCP1() failed",
        __FUNCTION__);
    return error;
  }

  return error;
}

Status
ProcessFreeBSD::DoAttachToProcessWithID(lldb::pid_t pid,
                                        const ProcessAttachInfo &attach_info) {
  Status error;
  assert(m_monitor == NULL);

  Log *log(ProcessPOSIXLog::GetLogIfAllCategoriesSet(POSIX_LOG_PROCESS));
  LLDB_LOGV(log, "pid = {0}", GetID());

  m_monitor = new ProcessMonitor(this, pid, error);

  if (!error.Success())
    return error;

  PlatformSP platform_sp(GetTarget().GetPlatform());
  assert(platform_sp.get());
  if (!platform_sp)
    return error; // FIXME: Detatch?

  // Find out what we can about this process
  ProcessInstanceInfo process_info;
  platform_sp->GetProcessInfo(pid, process_info);

  // Resolve the executable module
  ModuleSP exe_module_sp;
  FileSpecList executable_search_paths(
      Target::GetDefaultExecutableSearchPaths());
  ModuleSpec exe_module_spec(process_info.GetExecutableFile(),
                             GetTarget().GetArchitecture());
  error = platform_sp->ResolveExecutable(
      exe_module_spec, exe_module_sp,
      executable_search_paths.GetSize() ? &executable_search_paths : NULL);
  if (!error.Success())
    return error;

  // Fix the target architecture if necessary
  const ArchSpec &module_arch = exe_module_sp->GetArchitecture();
  if (module_arch.IsValid() &&
      !GetTarget().GetArchitecture().IsExactMatch(module_arch))
    GetTarget().SetArchitecture(module_arch);

  // Initialize the target module list
  GetTarget().SetExecutableModule(exe_module_sp, eLoadDependentsYes);

  SetSTDIOFileDescriptor(m_monitor->GetTerminalFD());

  SetID(pid);

  return error;
}

bool RegisterContextPOSIXProcessMonitor_powerpc::WriteRegister(
    const unsigned reg, const RegisterValue &value) {
  unsigned reg_to_write = reg;
  RegisterValue value_to_write = value;

  // Check if this is a subregister of a full register.
  const RegisterInfo *reg_info = GetRegisterInfoAtIndex(reg);
  if (reg_info->invalidate_regs &&
      (reg_info->invalidate_regs[0] != LLDB_INVALID_REGNUM)) {
    RegisterValue full_value;
    uint32_t full_reg = reg_info->invalidate_regs[0];
    const RegisterInfo *full_reg_info = GetRegisterInfoAtIndex(full_reg);

    // Read the full register.
    if (ReadRegister(full_reg_info, full_value)) {
      Status error;
      ByteOrder byte_order = GetByteOrder();
      uint8_t dst[RegisterValue::kMaxRegisterByteSize];

      // Get the bytes for the full register.
      const uint32_t dest_size = full_value.GetAsMemoryData(
          full_reg_info, dst, sizeof(dst), byte_order, error);
      if (error.Success() && dest_size) {
        uint8_t src[RegisterValue::kMaxRegisterByteSize];

        // Get the bytes for the source data.
        const uint32_t src_size = value.GetAsMemoryData(
            reg_info, src, sizeof(src), byte_order, error);
        if (error.Success() && src_size && (src_size < dest_size)) {
          // Copy the src bytes to the destination.
          memcpy(dst + (reg_info->byte_offset & 0x1), src, src_size);
          // Set this full register as the value to write.
          value_to_write.SetBytes(dst, full_value.GetByteSize(), byte_order);
          value_to_write.SetType(full_reg_info);
          reg_to_write = full_reg;
        }
      }
    }
  }

  ProcessMonitor &monitor = GetMonitor();
  // Account for the fact that 32-bit targets on powerpc64 really use 64-bit
  // registers in ptrace, but expose here 32-bit registers with a higher
  // offset.
  uint64_t offset = GetRegisterOffset(reg_to_write);
  offset &= ~(sizeof(uintptr_t) - 1);
  return monitor.WriteRegisterValue(
      m_thread.GetID(), offset, GetRegisterName(reg_to_write), value_to_write);
}

bool ClangUserExpression::PrepareForParsing(
    DiagnosticManager &diagnostic_manager, ExecutionContext &exe_ctx) {
  InstallContext(exe_ctx);

  if (!SetupPersistentState(diagnostic_manager, exe_ctx))
    return false;

  Status err;
  ScanContext(exe_ctx, err);

  if (!err.Success()) {
    diagnostic_manager.PutString(eDiagnosticSeverityWarning, err.AsCString());
  }

  ////////////////////////////////////
  // Generate the expression
  //

  ApplyObjcCastHack(m_expr_text);

  SetupDeclVendor(exe_ctx, m_target);

  UpdateLanguageForExpr(diagnostic_manager, exe_ctx);
  return true;
}

bool Communication::JoinReadThread(Status *error_ptr) {
  if (!m_read_thread.IsJoinable())
    return true;

  Status error = m_read_thread.Join(nullptr);
  return error.Success();
}

Status PlatformAndroidRemoteGDBServer::MakeConnectURL(
    const lldb::pid_t pid, const uint16_t remote_port,
    llvm::StringRef remote_socket_name, std::string &connect_url) {
  static const int kAttempsNum = 5;

  Status error;
  // There is a race possibility that somebody will occupy a port while we're
  // in between FindUnusedPort and ForwardPortWithAdb - adding the loop to
  // mitigate such problem.
  for (auto i = 0; i < kAttempsNum; ++i) {
    uint16_t local_port = 0;
    error = FindUnusedPort(local_port);
    if (error.Fail())
      return error;

    error = ForwardPortWithAdb(local_port, remote_port, remote_socket_name,
                               m_socket_namespace, m_device_id);
    if (error.Success()) {
      m_port_forwards[pid] = local_port;
      std::ostringstream url_str;
      url_str << "connect://localhost:" << local_port;
      connect_url = url_str.str();
      break;
    }
  }

  return error;
}

Status PipeWindows::CreateNew(llvm::StringRef name,
                              bool child_process_inherit) {
  if (name.empty())
    return Status(ERROR_INVALID_PARAMETER, eErrorTypeWin32);

  if (CanRead() || CanWrite())
    return Status(ERROR_ALREADY_EXISTS, eErrorTypeWin32);

  std::string pipe_path = "\\\\.\\Pipe\\";
  pipe_path.append(name);

  // Always open for overlapped i/o.  We implement blocking manually in Read and
  // Write.
  DWORD read_mode = FILE_FLAG_OVERLAPPED;
  m_read = ::CreateNamedPipeA(
      pipe_path.c_str(), PIPE_ACCESS_INBOUND | read_mode,
      PIPE_TYPE_BYTE | PIPE_WAIT, 1, 1024, 1024, 120 * 1000, NULL);
  if (INVALID_HANDLE_VALUE == m_read)
    return Status(::GetLastError(), eErrorTypeWin32);
  m_read_fd = _open_osfhandle((intptr_t)m_read, _O_RDONLY);
  ZeroMemory(&m_read_overlapped, sizeof(m_read_overlapped));
  m_read_overlapped.hEvent = ::CreateEvent(nullptr, TRUE, FALSE, nullptr);

  // Open the write end of the pipe.
  Status result = OpenNamedPipe(name, child_process_inherit, false);
  if (!result.Success()) {
    CloseReadFileDescriptor();
    return result;
  }

  return result;
}

Status OptionValueDictionary::SetValueFromString(llvm::StringRef value,
                                                 VarSetOperationType op) {
  Args args(value.str());
  Status error = SetArgs(args, op);
  if (error.Success())
    NotifyValueChanged();
  return error;
}

bool HostProcessPosix::IsRunning() const {
  if (m_process == kInvalidPosixProcess)
    return false;

  // Send this process the null signal.  If it succeeds the process is running.
  Status error = Signal(0);
  return error.Success();
}

Status NativeRegisterContextLinux_mips64::ReadAllRegisterValues(
    lldb::DataBufferSP &data_sp) {
  Status error;

  data_sp.reset(new DataBufferHeap(REG_CONTEXT_SIZE, 0));
  if (!data_sp) {
    error.SetErrorStringWithFormat(
        "failed to allocate DataBufferHeap instance of size %" PRIu64,
        REG_CONTEXT_SIZE);
    return error;
  }

  error = ReadGPR();
  if (!error.Success()) {
    error.SetErrorString("ReadGPR() failed");
    return error;
  }

  error = ReadCP1();
  if (!error.Success()) {
    error.SetErrorString("ReadCP1() failed");
    return error;
  }

  uint8_t *dst = data_sp->GetBytes();
  if (dst == nullptr) {
    error.SetErrorStringWithFormat("DataBufferHeap instance of size %" PRIu64
                                   " returned a null pointer",
                                   REG_CONTEXT_SIZE);
    return error;
  }

  ::memcpy(dst, &m_gpr, GetRegisterInfoInterface().GetGPRSize());
  dst += GetRegisterInfoInterface().GetGPRSize();

  ::memcpy(dst, &m_fpr, GetFPRSize());
  dst += GetFPRSize();

  ::memcpy(dst, &m_msa, sizeof(MSA_linux_mips));

  return error;
}

static size_t ReadMemoryCallback(EmulateInstruction *instruction, void *baton,
                                 const EmulateInstruction::Context &context,
                                 lldb::addr_t addr, void *dst, size_t length) {
  EmulatorBaton *emulator_baton = static_cast<EmulatorBaton *>(baton);

  Status error;
  size_t bytes_read =
      emulator_baton->m_process->DoReadMemory(addr, dst, length, error);
  if (!error.Success())
    bytes_read = 0;
  return bytes_read;
}

static Status FindUnusedPort(uint16_t &port) {
  Status error;
  std::unique_ptr<TCPSocket> tcp_socket(new TCPSocket(true, false));
  if (error.Fail())
    return error;

  error = tcp_socket->Listen("127.0.0.1:0", 1);
  if (error.Success())
    port = tcp_socket->GetLocalPortNumber();

  return error;
}

void DYLDRendezvous::UpdateBaseAddrIfNecessary(SOEntry &entry,
                                               std::string const &file_path) {
  // If the load bias reported by the linker is incorrect then fetch the load
  // address of the file from the proc file system.
  if (isLoadBiasIncorrect(m_process->GetTarget(), file_path)) {
    lldb::addr_t load_addr = LLDB_INVALID_ADDRESS;
    bool is_loaded = false;
    Status error =
        m_process->GetFileLoadAddress(entry.file_spec, is_loaded, load_addr);
    if (error.Success() && is_loaded)
      entry.base_addr = load_addr;
  }
}

OptionValueFormatEntity::OptionValueFormatEntity(const char *default_format)
    : OptionValue(), m_current_format(), m_default_format(), m_current_entry(),
      m_default_entry() {
  if (default_format && default_format[0]) {
    llvm::StringRef default_format_str(default_format);
    Status error = FormatEntity::Parse(default_format_str, m_default_entry);
    if (error.Success()) {
      m_default_format = default_format;
      m_current_format = default_format;
      m_current_entry = m_default_entry;
    }
  }
}