testsuite/systemtap.base/cast.stp


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probe begin
{
    curr = task_current()

    // Compare PIDs
    pid = pid()
    cast_pid = @cast(curr, "task_struct")->tgid
    if (pid == cast_pid)
        println("PID OK")
    else
        printf("PID %d != %d\n", pid, cast_pid)

    // Compare execnames
    name = execname()
    cast_name = kernel_string(@cast(curr, "task_struct")->comm)
    if (name == cast_name)
        println("execname OK")
    else
        printf("execname \"%s\" != \"%s\"\n", name, cast_name)

    exit()
}