C++ compiler and name mangling

lavenu patrick1

Hello,

I "m using C++ with C6x compiler and generate COFF files. Sometimes , I have a redefinition issue at linking.
This happen when I have 2 files in my project with the same name and the compiler need to create 2 __STI__ symbol.
Sometimes, it creates __STI__fileName_X and __STI_fileName_Y with X=Y and then I have a redefintion sometimes X != Y and the linking is OK.
Please could you give me some informations about the name mangling algorithm used in C6x compiler ? I would like to understand this behavior.
Could you tell me what are __STI__ symbol used for ?
More genrally, where can I find the meaning of all symbol : __STI__xxx, __vtbl__xxx, __dt___xxx created by the name mangling algorithm ?

Thank you very much for your help.

Pat.

over 10 years ago

0 Markus Moll over 10 years ago

Expert 1820 points

You can use the TI demangler dem6x.exe to find out what these symbols mean:

C:\> dem6x.exe

TMS320C6x C++ Demangler          v 7.4.7
Tools Copyright (c) 1996-2014    Texas Instruments Incorporated

then type e.g.

___dt__Q2__3std12length_errorFv

and the output will be

std::length_error::~length_error()

0 lavenu patrick1 over 10 years ago in reply to Markus Moll

Intellectual 600 points

Thank you very much for your help, dem6x.exe is very usefull but it can not decode __STI__ symbol ?

On the other hand, what is your opinion about my symbol redefinition with the name mangling ?

Thank you.

0 Chester Gillon over 10 years ago

Guru 92251 points

lavenu patrick1 said:
Could you tell me what are __STI__ symbol used for ?

Have you seen C6000 C++ name demangling?

0 lavenu patrick1 over 10 years ago in reply to Chester Gillon

Intellectual 600 points

Thank you very much for your help, I understand now why dem6x can not demangled __STI__ symbol.

I have a project that is included 2 files with 2 same name but in 2 differents directories. C++ linker for C6x can not deals with that if it has to create 2 symbols __STI_Name_file__xx because it involves a Symbol redefinition.Could you confirm this behavior ?

Thanks.

0 Archaeologist over 10 years ago

TI__Guru* 84285 points

The STI functions aren't really mangled C++ object names, they are "unique" function names generated by the parser. They cannot be decoded with the C++ demangler.

You are most likely suffering from SDSCM00050703, described in the following forum thread:

http://e2e.ti.com/support/development_tools/compiler/f/343/t/360064.aspx

0 lavenu patrick1 over 10 years ago in reply to Archaeologist

Intellectual 600 points

It is exactly my problem ! thank you very much for your help.

Pat.

Code Composer Studio™︎

Code Composer Studio forum

C++ compiler and name mangling