GDB and sleeping processes

From: Aleksi Asikainen (aleksi.asikainen_at_infire.com)
Date: 08/26/03

  • Next message: L: "Re: SOS - why does an application work fine with a hub but not a switch box?" 
    Date: Tue, 26 Aug 2003 18:07:09 +0300

    Hi,

    I have a server with a couple hundred of processes which I need attach with
    gdb every now and then. The processes being 'live', I can't start them from
    gdb, and I believe this is somewhat part of the problem; Linux wishes to
    keenly put all of these processes to sleeping state and once they've gotten
    to the sleeping state, gdb naturally has problems attaching itself to them.

    Google suggested that sending SIGALRM to the process might wake it up, but
    this doesn't seem to be so; if kill -s SIGALRM is sent to a process that
    doesn't handle the signal, the process will quit. If it's sent to a process
    that does handle the signal ('handle' here means using the signal(2) call),
    then the process does not wake up.

    What should I do to make sure the process will wake up? I'm running on
    RedHat 7.3 with 2.4.20-13.8smp.

    Aleksi Asikainen

  • Next message: L: "Re: SOS - why does an application work fine with a hub but not a switch box?"

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