CODEWITHSUNDEEP
windowsvisual-c++librariesportable-executabledumpbin
rwallace
rwallace

Reputation: 33515

What kind of library contents dumpbin as neither symbols or exports?

Generally speaking, dumpbin /symbols shows the symbols exported from a static library, and dumpbin /exports shows the symbols exported from a dynamic library.

I have encountered a library that doesn't show up as either:

(c1) C:\Python-3.10.4\PCbuild\amd64>dumpbin /symbols liblzma.lib
Microsoft (R) COFF/PE Dumper Version 14.31.31104.0
Copyright (C) Microsoft Corporation.  All rights reserved.


Dump of file liblzma.lib

File Type: LIBRARY

(c1) C:\Python-3.10.4\PCbuild\amd64>dumpbin /exports liblzma.lib
Microsoft (R) COFF/PE Dumper Version 14.31.31104.0
Copyright (C) Microsoft Corporation.  All rights reserved.


Dump of file liblzma.lib

File Type: LIBRARY

So far, it looks empty, but it's not:

(c1) C:\Python-3.10.4\PCbuild\amd64>dumpbin /all liblzma.lib
Microsoft (R) COFF/PE Dumper Version 14.31.31104.0
Copyright (C) Microsoft Corporation.  All rights reserved.


Dump of file liblzma.lib

File Type: LIBRARY

Archive member name at 8: /
62937EFF time/date Sun May 29 15:11:11 2022
         uid
         gid
       0 mode
    147C size
correct header end

    203 public symbols

     3DFE lzma_simple_x86_decoder_init
     3DFE lzma_simple_x86_encoder_init
    120A0 lzma_simple_sparc_decoder_init
    120A0 lzma_simple_sparc_encoder_init
    1FB6A lzma_simple_props_encode
    1FB6A lzma_simple_props_size
    2CD9E lzma_simple_props_decode
    3A070 lzma_simple_coder_init
    49578 lzma_simple_powerpc_decoder_init
    49578 lzma_simple_powerpc_encoder_init
    ...

So it has plenty of contents, that are showing up as... what is going on here? What kind of library is this? How should the above output be interpreted?

Upvotes: 2

Views: 292

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