Subversion Repositories HelenOS

static int udebug_rp_end(call_t *call, phone_t *phone)

{

    task_t *ta;

    ipl_t ipl;

    thread_t *t;

    link_t *cur;

    klog_printf("udebug_rp_end()");

    ipl = interrupts_disable();

    ta = get_lock_callee_task(phone);

    klog_printf("task %llu", ta->taskid);

    //TODO: UDEBUG_TS_BEGINNING

    if (ta->dt_state != UDEBUG_TS_ACTIVE) {

        spinlock_unlock(&ta->lock);

        interrupts_restore(ipl);

        klog_printf("udebug_rp_begin(): task not in TS_BEGINNING");

        return EINVAL;

    }

    /* Clear debug_active from all of the task's userspace threads */

    for (cur = ta->th_head.next; cur != &ta->th_head; cur = cur->next) {

        t = list_get_instance(cur, thread_t, th_link);

        spinlock_lock(&t->lock);

        if ((t->flags & THREAD_FLAG_USPACE) != 0)

            t->debug_active = true;

        spinlock_unlock(&t->lock);

    }

    /* Now respond to unanswered GO calls and reset thread states */

    for (cur = ta->th_head.next; cur != &ta->th_head; cur = cur->next) {

        t = list_get_instance(cur, thread_t, th_link);

        spinlock_lock(&t->lock);

        /* Still has go? */

        if ((t->flags & THREAD_FLAG_USPACE) != 0 &&

            t->debug_stop == false) {

            /*

             * Yes, so clear go. As debug_active == false,

             * this doesn't affect anything.

             */

            t->debug_stop = true;  

            /* Answer GO call */

            ipc_answer(&ta->answerbox, t->debug_go_call);

        } else {

            /*

             * Debug_stop is already at initial value.

             * Yet this means the thread needs waking up.

             */

            waitq_wakeup(&t->go_wq, WAKEUP_FIRST);

        }

        spinlock_unlock(&t->lock);

    }

    ta->dt_state = UDEBUG_TS_INACTIVE;

    spinlock_unlock(&ta->lock);

    interrupts_restore(ipl);

    klog_printf("udebug_rp_end() done\n");

    return 1;

}

    case UDEBUG_M_END:

        rc = udebug_rp_end(call, phone);

        return rc;