touch and go breakpoints?

["Michael D. Crawford" <crawford@goingware.com>]

Is there a way I can set a breakpoint, where if it is hit, gdb will execute 
some command, and then continue?

What I want to do is print out the value of a variable everytime a certain line 
in the code is encountered, but then continue.  I have a crash somewhat later, 
but only after lots of iterations, so what I'd like to do is see what the last 
value of this variable is before the crash.

I used to do this in MacsBug for the old Mac OS like this:

brp 1234 ';dm a0;g'

that will break at location 1234, display some memory starting at whatever 
register a0 is, then go.

Thanks,

Mike
-- 
Michael D. Crawford
GoingWare Inc. - Expert Software Development and Consulting
http://www.goingware.com/
crawford@goingware.com

      Tilting at Windmills for a Better Tomorrow.