#! stap -p2

// read the address of various task_struct members.
// all should roughly be $p + offsetof(foo)
probe kernel.function("release_task") {
    println(& $p->state)  // long
    println(& $p->usage)  // atomic_t
    println(& $p->comm)   // comm[TASK_COMM_LEN]
    println(& $p->comm[1])
    println(& $p->parent) // task_struct*
}