Doug Evans dje@google.com
Tue May 7 04:43:00 GMT 2013

On Mon, May 6, 2013 at 2:52 AM, Marc Brünink <marc@nus.edu.sg> wrote:
> I want to execute a piece of code at regular intervals. Actually I'm sampling $pc.
> (let's not go into detail why I use gdb)
> My current solution just starts another process that sends a SIGTRAP to the debugged application. Using a simple script I can print the $pc.
> However, I just realised that this approach does not work too well. If gdb is stopped due to a breakpoint it will interpret the received SIGTRAP as another hit of the very same breakpoint.
> Reproduce:
> 1. Attach to any program
> 2. Create any breakpoint
> 3. Wait until breakpoint is hit
> 4. Send SIGTRAP to debugged application
> 5. continue
> Actually, now that I think about it, I should have anticipated this behaviour.
> Is there a better way to execute a piece of code at regular intervals?

bash$ man setitimer

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