c++ - DLL 调试信息

Question

我已经创建了一个 DLL 的生产版本。在使用 virustotal 扫描它时，我注意到报告调试信息的结果在文件中，如下所示。有人可以告诉我这个调试信息是什么以及如何删除它吗？ DLL 来自使用 Visual Studio Community 2017 构建的 c++。

在有人给我一般性建议之前，我想说的是，不，我不需要调试信息，也不希望其他任何人获得此调试信息。

DLL 的 DUMPBIN/header 如下:

PE signature found

File Type: DLL

FILE HEADER VALUES
             14C machine (x86)
               5 number of sections
        58FBCD28 time date stamp Sat Apr 22 22:37:44 2017
               0 file pointer to symbol table
               0 number of symbols
              E0 size of optional header
            2102 characteristics
                   Executable
                   32 bit word machine
                   DLL

OPTIONAL HEADER VALUES
             10B magic # (PE32)
           14.10 linker version
           10800 size of code
            9800 size of initialized data
               0 size of uninitialized data
            2E64 entry point (10002E64)
            1000 base of code
           12000 base of data
        10000000 image base (10000000 to 1001DFFF)
            1000 section alignment
             200 file alignment
            6.00 operating system version
            0.00 image version
            6.00 subsystem version
               0 Win32 version
           1E000 size of image
             400 size of headers
               0 checksum
               2 subsystem (Windows GUI)
             140 DLL characteristics
                   Dynamic base
                   NX compatible
          100000 size of stack reserve
            1000 size of stack commit
          100000 size of heap reserve
            1000 size of heap commit
               0 loader flags
              10 number of directories
           17E40 [     14C] RVA [size] of Export Directory
           17F8C [      50] RVA [size] of Import Directory
           1B000 [     1E0] RVA [size] of Resource Directory
               0 [       0] RVA [size] of Exception Directory
               0 [       0] RVA [size] of Certificates Directory
           1C000 [    11CC] RVA [size] of Base Relocation Directory
           17780 [      38] RVA [size] of Debug Directory
               0 [       0] RVA [size] of Architecture Directory
               0 [       0] RVA [size] of Global Pointer Directory
               0 [       0] RVA [size] of Thread Storage Directory
           177B8 [      40] RVA [size] of Load Configuration Directory
               0 [       0] RVA [size] of Bound Import Directory
           12000 [     188] RVA [size] of Import Address Table Directory
               0 [       0] RVA [size] of Delay Import Directory
               0 [       0] RVA [size] of COM Descriptor Directory
               0 [       0] RVA [size] of Reserved Directory


SECTION HEADER #1
   .text name
   1069A virtual size
    1000 virtual address (10001000 to 10011699)
   10800 size of raw data
     400 file pointer to raw data (00000400 to 00010BFF)
       0 file pointer to relocation table
       0 file pointer to line numbers
       0 number of relocations
       0 number of line numbers
60000020 flags
         Code
         Execute Read

SECTION HEADER #2
  .rdata name
    6834 virtual size
   12000 virtual address (10012000 to 10018833)
    6A00 size of raw data
   10C00 file pointer to raw data (00010C00 to 000175FF)
       0 file pointer to relocation table
       0 file pointer to line numbers
       0 number of relocations
       0 number of line numbers
40000040 flags
         Initialized Data
         Read Only

  Debug Directories

        Time Type        Size      RVA  Pointer
    -------- ------- -------- -------- --------
    58FBCD28 coffgrp      264 0001782C    1642C    4C544347 (LTCG)
    58FBCD28 iltcg          0 00000000        0

SECTION HEADER #3
   .data name
    1884 virtual size
   19000 virtual address (10019000 to 1001A883)
     800 size of raw data
   17600 file pointer to raw data (00017600 to 00017DFF)
       0 file pointer to relocation table
       0 file pointer to line numbers
       0 number of relocations
       0 number of line numbers
C0000040 flags
         Initialized Data
         Read Write

SECTION HEADER #4
   .rsrc name
     1E0 virtual size
   1B000 virtual address (1001B000 to 1001B1DF)
     200 size of raw data
   17E00 file pointer to raw data (00017E00 to 00017FFF)
       0 file pointer to relocation table
       0 file pointer to line numbers
       0 number of relocations
       0 number of line numbers
40000040 flags
         Initialized Data
         Read Only

SECTION HEADER #5
  .reloc name
    11CC virtual size
   1C000 virtual address (1001C000 to 1001D1CB)
    1200 size of raw data
   18000 file pointer to raw data (00018000 to 000191FF)
       0 file pointer to relocation table
       0 file pointer to line numbers
       0 number of relocations
       0 number of line numbers
42000040 flags
         Initialized Data
         Discardable
         Read Only

  Summary

        2000 .data
        7000 .rdata
        2000 .reloc
        1000 .rsrc
       11000 .text

Answer 1

要完全消除调试目录，请将 /NOCOFFGRPINFO 添加到链接器命令行，并在 Linker/Optimization 下关闭链接时间代码生成(即删除 /LTCG)，这在 VS2017 中默认启用发布版本。