理论上写中文注释是没问题的,因为 VS 是支持中文的。但是,很多用于 Build 的工具并没有考虑这种情况,因此会导致稀奇古怪的问题。最近我遇到了一个编译错误

C:\BuildBs\201903>build -a X64
Build environment: Windows-10-10.0.16299-SP0
Build start time: 09:15:25, Jun.02 2019

WORKSPACE        = c:\buildbs\201903
EDK_TOOLS_PATH   = c:\buildbs\201903\basetools
EDK_TOOLS_BIN    = c:\buildbs\201903\basetools\bin\win32
CONF_PATH        = c:\buildbs\201903\conf
PYTHON_COMMAND   = py -3


Architecture(s)  = X64
Build target     = DEBUG
Toolchain        = VS2015x86

Active Platform          = c:\buildbs\201903\Nt32Pkg\Nt32Pkg.dsc
Flash Image Definition   = c:\buildbs\201903\Nt32Pkg\Nt32Pkg.fdf

Processing meta-data .....


build.py...
 : error C0DE: Unknown fatal error when processing [c:\buildbs\201903\MdeModulePkg\Application\UiApp\UiApp.inf]

(Please send email to edk2-devel@lists.01.org for help, attaching following call stack trace!)

(Python 3.6.6 on win32) Traceback (most recent call last):
  File "C:\BuildBs\201903\BaseTools\Source\Python\build\build.py", line 2387, in Main
    MyBuild.Launch()
  File "C:\BuildBs\201903\BaseTools\Source\Python\build\build.py", line 2141, in Launch
    self._MultiThreadBuildPlatform()
  File "C:\BuildBs\201903\BaseTools\Source\Python\build\build.py", line 1967, in _MultiThreadBuildPlatform
    Ma.CreateCodeFile(True)
  File "C:\BuildBs\201903\BaseTools\Source\Python\AutoGen\AutoGen.py", line 4042, in CreateCodeFile
    for File in self.AutoGenFileList:
  File "C:\BuildBs\201903\BaseTools\Source\Python\Common\caching.py", line 34, in __get__
    Value = obj.__dict__[self._function.__name__] = self._function(obj)
  File "C:\BuildBs\201903\BaseTools\Source\Python\AutoGen\AutoGen.py", line 3295, in AutoGenFileList
    GenC.CreateCode(self, AutoGenC, AutoGenH, StringH, AutoGenUniIdf, UniStringBinBuffer, StringIdf, AutoGenUniIdf, IdfGenBinBuffer)
  File "C:\BuildBs\201903\BaseTools\Source\Python\AutoGen\GenC.py", line 2048, in CreateCode
    CreateUnicodeStringCode(Info, AutoGenC, StringH, UniGenCFlag, UniGenBinBuffer)
  File "C:\BuildBs\201903\BaseTools\Source\Python\AutoGen\GenC.py", line 1711, in CreateUnicodeStringCode
    Header, Code = GetStringFiles(Info.UnicodeFileList, SrcList, IncList, Info.IncludePathList, ['.uni', '.inf'], Info.Name, CompatibleMode, ShellMode, UniGenCFlag, UniGenBinBuffer, FilterInfo)
  File "C:\BuildBs\201903\BaseTools\Source\Python\AutoGen\StrGather.py", line 565, in GetStringFiles
    Uni = SearchString(Uni, sorted (FileList), IsCompatibleMode)
  File "C:\BuildBs\201903\BaseTools\Source\Python\AutoGen\StrGather.py", line 537, in SearchString
    for Line in Lines:
  File "C:\Python36\lib\encodings\cp1252.py", line 23, in decode
    return codecs.charmap_decode(input,self.errors,decoding_table)[0]
UnicodeDecodeError: 'charmap' codec can't decode byte 0x90 in position 134: character maps to <undefined>

从错误上来看,发生在 c:\buildbs\201903\MdeModulePkg\Application\UiApp\UiApp.inf 文件中,反复检查该文件无法确定问题点。

最终比对相同文件的不同版本,确定错误是由于我在 \MdeModulePkg\Application\UiApp\FrontPage.c 函数 InitializeUserInterface 添加的一行注释导致的

EFI_STATUS
EFIAPI
InitializeUserInterface (
  IN EFI_HANDLE        ImageHandle,
  IN EFI_SYSTEM_TABLE  *SystemTable
  )
{
  EFI_HII_HANDLE                     HiiHandle;
  EFI_STATUS                         Status;
  EFI_GRAPHICS_OUTPUT_PROTOCOL       *GraphicsOutput;
  EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL    *SimpleTextOut;
  UINTN                              BootTextColumn;
  UINTN                              BootTextRow;
//生成一个随机的字符串
  if (!mModeInitialized) {

猜测可能的原因是 build 工具(不是VS 编译工具),在预处理 FrontPage.c 时无法正确处理注释中的中文导致的。因此,在编写代码的时候,尽量不要使用中文作为注释,以免遇到这样的问题。

Leave a Reply

电子邮件地址不会被公开。 必填项已用*标注

You may use these HTML tags and attributes:

<a href="" title=""> <abbr title=""> <acronym title=""> <b> <blockquote cite=""> <cite> <code> <del datetime=""> <em> <i> <q cite=""> <s> <strike> <strong>