dbx supports the catch command, which instructs dbx to stop a program when dbx detects any of the signals appearing on the catch list.
By default, the catch list contains many of the more than 33 detectable signals. (The numbers depend upon the operating system and version.) You can change the default catch list by adding signals to or removing them from the default catch list.
To see the list of signals currently being trapped, type catch with no signal argument.
(dbx) catch
To see a list of the signals currently being ignored by dbx when the program detects them, type ignore with no signal argument.
(dbx) ignore