I'm not sure if this is the right location, but please move it if I'm wrong.

I am developing a program on QNX Neutrino 6.4.1 and sometimes I get a signal and the program crashes.
I already have a signal handler implemented, but what I want to have is a printed back-trace in my logging.

I have read : http://www.qnx.com/developers/docs/6.4.1/neutrino/technotes/backtrace.html
and still have a few questions.

My program is multi-threaded, but I hope that the thread that enters the signal handler is the same as the one that 
caused the problem, can anyone verify this?

I hope I can use "backtrace the calling thread"

In a multi-threaded application, can I use:
[code]
bt_init_accessor(&acc_sighandler1, BT_SELF);
[/code]
in the main once for ALL threads?
Or does the function needs to be called for each thread?

The function:
[code]
    cnt_sighandler1 =
        bt_get_backtrace(&acc_sighandler1, pc_sighandler1,
           sizeof(pc_sighandler1)/sizeof(bt_addr_t));
[/code]
Gets the backtrace, but does anyone know if it delivers readable data, of function pointers?