CODEWITHSUNDEEP
c++windowsvisual-studio-2010dll
TomiL
TomiL

Reputation: 697

DLL function names using dumpbin.exe

I have written a .dll library with lots of functions and classes in visual studio 2010. When I look at the content of the file with:

dumpbin.exe /EXPORTS myDll.dll

I get long function names with some kind of a function location pointer, which looks like this (second entry in .dll):

          2    1 0001100A ?Initialize@codec@codecX@@SANNN@Z = @ILT+5(?Initialize@codec@codecX@@SANNN@Z)

This is somehow hard to read, but I saw "nicer" procedure/function list from other .dll-s, like this:

141   8C 00002A08 PogoDbWriteValueProbeInfo

How can I make that .dll list look that way?

P.S.: my dll source code looks like this:

namespace codecX
{
   class codec
   {
      public:
      static __declspec(dllexport) double Initialize(double a, double b);
      ...

Upvotes: 14

Views: 40111

Answers (3)

Ayman Salah
Ayman Salah

Reputation: 1089

What you are seeing is C++ mangling of function names.

In case this function needs to be kept as a C++ function you can post process the dumpbin.exe output to obtain the normal function name using the utility undname.exe.

Supplied with Microsoft Visual Studio is a utility for undecorating C++ mangled function names called undname.exe.

It can be used as follows:

C:\>undname ?func1@a@@AAEXH@Z
Microsoft (R) C++ Name Undecorator
Copyright (C) Microsoft Corporation. All rights reserved.

Undecoration of :- "?func1@a@@AAEXH@Z"
is :- "private: void __thiscall a::func1(int)"

Upvotes: 3

bash.d
bash.d

Reputation: 13217

This is called name-mangling and happens when you compile C++ with a C++-compiler. In order to retain the "humand-readable" names you'll have to use extern "C" when declaring and defining your classes and your functions. i.e.

extern "C" void myFunction(int, int);

See here and also google mixing C and C++.

Upvotes: 6

John Källén
John Källén

Reputation: 7983

You need to pull those static member functions into the global address space and then wrap them with extern "C". This will suppress the C++ name mangling and instead give you C name mangling which is less ugly:

extern "C" __declspec(dllexport) Initialize(double a, double b)
{
    codec::Initialize(a, b);
}

and then remove the __declspec(dllexport) on your static member functions:

class codec
{
    public:
        static double Initialize(double a, double b);
}

Upvotes: 13

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