Debugging with GDB Manual (5900-1473; WDB 6.2; January 2011)

condition bnum Remove the condition from breakpoint number
bnum. It becomes an ordinary unconditional
breakpoint.
A special case of a breakpoint condition is to stop only when the breakpoint has been
reached a certain number of times. This is so useful that there is a special way to do it,
using the ignore count of the breakpoint. Every breakpoint has an ignore count,
which is an integer. Most of the time, the ignore count is zero, and therefore has no
effect. But if your program reaches a breakpoint whose ignore count is positive, then
instead of stopping, it just decrements the ignore count by one and continues. As a result,
if the ignore count value is n, the breakpoint does not stop the next n times your program
reaches it.
ignore bnum count Set the ignore count of breakpoint number bnum to count.
The next count times the breakpoint is reached, your
program's execution does not stop; other than to decrement
the ignore count, GDB takes no action.
To make the breakpoint stop the next time it is reached,
specify a count of zero.
When you use continue to resume execution of your
program from a breakpoint, you can specify an ignore count
directly as an argument to continue, rather than using
ignore. See “Continuing and stepping” (page 59).
If a breakpoint has a positive ignore count and a condition,
the condition is not checked. Once the ignore count reaches
zero, GDB resumes checking the condition.
You could achieve the effect of the ignore count with a
condition such as '$foo-- <= 0' using a debugger
convenience variable that is decremented each time. See
“Convenience variables” (page 89).
Ignore counts apply to breakpoints, watchpoints, and catchpoints.
5.1.6 Breakpoint command lists
You can give any breakpoint (or watchpoint or catchpoint) a series of commands to
execute when your program stops due to that breakpoint. For example, you might want
to print the values of certain expressions, or enable other breakpoints.
commands [bnum], ...
command-list ..., end
Specify a list of commands for breakpoint number bnum.
The commands themselves appear on the following lines.
56 Stopping and Continuing