gdb questions..

alaios · 09-24-2005, 08:18 PM

Hi is it possible when debugging a prog with the gdb to view what gdb is executing> I need that because my programme stops and i want to ifnd out where,,, One way for doing that is to place watchpooints everywhere and to see where it stops... but my programmes i big enough for such procedure

paulsm4 · 09-25-2005, 01:21 AM

I'm not sure I understand the question, but you can attach to a live process with gdb.

FOR EXAMPLE:
1. You think the program is hanging - you don't know where, but you can see it "get stuck".
2. You compile the program with "-g" (permitting debugging), and let it run (normally, outside the debugger or in - it doesn't matter)
3. When it hangs...
4. You do:
a) ps -eaf|grep MYPROG
<= GET THE PID
b) gdb MYPROG MYPID
<= ATTACH TO THE LIVE PROCESS AND DEBUG

'Hope that helps .. PSM

alaios · 09-25-2005, 02:42 AM

exactly this but when the gdb starts i want by issuing some commands to be able to check what was the last thing the programme has do.....