how to demangle c++ symbols

dayalan_cse · 11-11-2008, 06:27 AM

Hello All,

how to demangle c++ symbols in Linux environment using the below tools.

1) nm
2) objdump

Thanks & Regards
Deenadayalan

vladmihaisima · 11-11-2008, 08:20 AM

You could do:

Code:

nm object.o  | c++filt

and

Code:

objdump -t object.o  | c++filt

dayalan_cse · 11-12-2008, 06:17 AM

Quote:

Originally Posted by vladmihaisima

You could do:

Code:

nm object.o  | c++filt

and

Code:

objdump -t object.o  | c++filt

Thanks for your information.

how can i demange a c++ symbol without using c++filt bcoz i see there is an option -C, followed by --Demangle=[std,gnu,...] to demangle c++ symbols.

Please let me know how to use nm or objdump to demangle c++ symbols without using c++filt.

Thanks,
Deenadayalan

vladmihaisima · 11-12-2008, 09:44 AM

Ok, I assume you didn't understand what the manual is trying to say. If not, please reprhase or give more details. Quoting from nm man page:

Code:

 -C
 --demangle[=style]
           Decode  (demangle) low-level symbol names into user-level names.  Besides removing any ini-
           tial underscore prepended by the system, this makes C++ function names readable.  Different
           compilers  have  different  mangling  styles. The optional demangling style argument can be
           used to choose an appropriate demangling style for your compiler.

This means, you can use

Code:

nm -C object.o

and it will work. You could specify something like:

Code:

nm --demangle=style object.o

but this is OPTIONAL. (so, as I do not know what style can I use there, I left it empty and it worked).

dayalan_cse · 11-12-2008, 11:26 PM

Quote:

Originally Posted by vladmihaisima

Ok, I assume you didn't understand what the manual is trying to say. If not, please reprhase or give more details. Quoting from nm man page:

Code:

 -C
 --demangle[=style]
           Decode  (demangle) low-level symbol names into user-level names.  Besides removing any ini-
           tial underscore prepended by the system, this makes C++ function names readable.  Different
           compilers  have  different  mangling  styles. The optional demangling style argument can be
           used to choose an appropriate demangling style for your compiler.

This means, you can use

Code:

nm -C object.o

and it will work. You could specify something like:

Code:

nm --demangle=style object.o

but this is OPTIONAL. (so, as I do not know what style can I use there, I left it empty and it worked).

Thank you for your inputs.

Interesting. you are correct. i used style as "gnu"

this display all symbols information, i want to demangle for given symbol alone using nm or objdump commands.

Thanks,
Deenadayalan