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Timer
- From: Marc Brünink <marc at nus dot edu dot sg>
- To: gdb <gdb at sourceware dot org>
- Cc: marc at nus dot edu dot sg
- Date: Mon, 6 May 2013 17:52:33 +0800
- Subject: Timer
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?
Marc