Printing backtrace whenever my program crashes?

Question

I have a C/C++ executable what I want that when ever there is a crash i.e. core is generated then it should print the back trace of the crash before exit which will help me in debugging.

Please suggest how to proceed.

Answer 1

I could not understand the real requirement of this but assuming that you want to debug the followings are my suggestion
1. Get the core and open that in gdb i.e. gdb <binary> -c <core> and take the backtrace using bt
2. Use the following macro in the code

  #define TRACE_MSG fprintf(stderr, __FUNCTION__     \
                                             "() [%s:%d] here I am\n", \
                             __FILE__, __LINE__)

use it intelligently as it can generate lot of traces
3. Include debug.h in the code and use debug_backtrace() - check the following link for more detail http://web.stanford.edu/~ouster/cgi-bin/cs140-spring14/pintos/pintos_10.html

Answer 2

In Linux/Unix, Create the binary in the debug mode(With -g option)
1) use pstack. It will help you in debugging .EG:
pstack corefile
2) If pstack is not in your machine. use command
gdb exename -c corefilename
and after that type bt
It will give you the necessary information. which could help you in debugging.

No code changes required for it.