debugging cygwin app that uses real time timer

[maxpagani]

Hi Everyone,
I am trying to debug my application (running on cygwin) the uses a real time timer (calls timer_create/setitimer) bound to a signal (SIGRTMIN). This signal interrupt the application quite frequently (set to 1ms).
When I step through the code, it happens frequently to fall into assembly code (somewhere in the cygwin1.dll). From this situation I can sometimes recover by stepping out (Ctrl+F7), but I am left at a different point in the source code losing my previous debugging context.

I tried to convince gdb to ignore signals by employing the following spell on gdb console -

handle SIG32 nostop

but nothing changed. Is there a way to debug my application as is, or have I to find a way to turn off the timer during debugging?
Thank you in advance

Best Regards