PROBEVUE: KILL() [WHO KILLED MY PROCESS?]

Body

This small probevue script will let you know who killed your process. Sometimes you might see that a process gets killed for no obvious reason and you have no idea who killed it. Of course here we're not talking about process dying because of a SEGV or SIGBUS, due to programming errors, but a genuine kill.

In the script below you can of course replace the 'when' filter for the probe by another signal. The script has to be run as root like this:

  # probevue -s 8 -o signal2.out signal2.pb

The output file, signal2.out here, might look like this:

  [ksh - 21823906 - 73335243] sent SIGKILL to pid 36307324

The script is:

/*
 * signal2.pb: Track the usage of 'kill(SIGKILL)' onto processes.
 *
 * Run as user 'root' using the following command line:
 *
 *     probevue -s 8 -o signal2.out signal2.pb
 *
 *
 * dalla
 */

int kill(int pid, int signo);

@@syscall:*:kill:entry
when (__arg2 == SIGKILL)
{
    printf("[%s - %d - %d] sent SIGKILL to pid %d\n",
           __pname, __pid, __tid, __arg1);
}