I am trying to understand the process flow of rgw part of ceph with the help of gdb, but I am stuck at a place where the program exits when they call a function global_init_prefork() after this function it is shwoing that main thread has exited successfully(detail is given below) and gdb stops , I am never able to make past this step.To get to my function through gdb I have to cross this function before.

Here is the image

A strange thing is when I put output buffer after that function and run cluster then the output is coming, but when doing with gdb the output buffer is not showing (outpur buffer means I writing some text in a file to check whether the program is reaching that part of the code)

Any suggestions will be of great help :)