Use dumpbin to show External symbol(UNDEF) for DLL?

Question

We all know we could use dumpbin for .obj file to show all the symbols including external ones.

dumpbin /symbols ExternCTest.ob
00F 00000000 UNDEF  notype ()    External     | ?foo@@YAHH@Z (int __cdecl foo(int))

But I am wondering how could I do this for DLL ? I have also tried dumpbin /exports as well as dependency walker but it's NOT showing external symbols.

How should I do it ?

Thanks

Alderney

/exports shows you what the DLL exports. /Imports shows you what external dependencies the DLL has, symbols that it needs to resolve by loading other DLLs. The equivalent of your snippet. If you get no output from /exports then you forgot to export functions with __declspec(dllexport) – Examinee

Thanks! is it doable from dependency walker for showing external symbol? I am trying to do analysis on a PC doesn't have Visual studio installed which probably mean dumpbin might not work ? – Alderney

What problem are you trying to solve? – Examinee

Go to a separately standalone PC trying to check which component is out of date/sync as it's trying to access a external link that doesn't exist anymore. I can run Dependency walker there, probably not dumpbin? – Alderney

Clearly you care about /imports here. Maybe you can diagnose it with depends.exe, it depends. It could be a dynamically loaded DLL or a COM component. You'll need to use its Profile option to see those. SysInternals' ProcMon utility shows everything. – Examinee

Looks like DW does the job but how does ProcMon do the trick ? I normally use it for file/reg monitoring... – Alderney

Answer 1

The command line argument you are looking for is /imports. This will show all external symbols referenced by the DLL.

Suspensor

Thanks! is it doable from dependency walker for showing external symbol? I am trying to do analysis on a PC doesn't have Visual studio installed which probably mean dumpbin might not work ? – Alderney

Yes, Dependency Walker will show both imports and exports for a PE file. It should also work just fine without VS installed (it's available as a separate app). – Suspensor