On Friday, 24 October 2014 at 21:02:05 UTC, Kapps wrote:
Yes, GDB is stopping on SIGUSR1 / SIGUSR2 since that's the default settings. D's GC uses these signals for suspending / resuming threads during a collection. You need to type what I said above, prior to typing 'run'.
I took a look at the Boehm GC earlier today and it appears they've made the signal set configurable, both to try and not use SIGUSR1/2 by default and to let the user specify another signal set if they need SIGUSR1/2 for some reason. It's probably worth doing this in our own code as well. The Boehm GC also does some magic with clearing signals at various points to make sure the right signal handlers will be called. Probably another enhancement request.