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{
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{
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    call_t *call;
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    call_t *call;
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    ipl_t ipl;
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    ipl_t ipl;
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    ipl = interrupts_disable();
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    ipl = interrupts_disable();
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    spinlock_lock(&THREAD->lock);
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    spinlock_lock(&THREAD->debug_lock);
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    if (THREAD->debug_active == true) {
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    if (THREAD->debug_active == true) {
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        klog_printf("udebug_syscall_event");
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        klog_printf("udebug_syscall_event");
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        call = THREAD->debug_go_call;
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        call = THREAD->debug_go_call;
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        IPC_SET_RETVAL(call->data, 0);
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        IPC_SET_RETVAL(call->data, 0);
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         * Make sure debug_stop is true when going to sleep
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         * Make sure debug_stop is true when going to sleep
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         * in case we get woken up by DEBUG_END. (At which
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         * in case we get woken up by DEBUG_END. (At which
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         * point it must be back to the initial true value).
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         * point it must be back to the initial true value).
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         */
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         */
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        THREAD->debug_stop = true;
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        THREAD->debug_stop = true;
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        spinlock_unlock(&THREAD->lock);
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        spinlock_unlock(&THREAD->debug_lock);
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        spinlock_lock(&TASK->lock);
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        spinlock_lock(&TASK->lock);
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        ipc_answer(&TASK->answerbox, THREAD->debug_go_call);
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        ipc_answer(&TASK->answerbox, THREAD->debug_go_call);
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        spinlock_unlock(&TASK->lock);
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        spinlock_unlock(&TASK->lock);
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        interrupts_restore(ipl);
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        interrupts_restore(ipl);
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        waitq_sleep(&THREAD->go_wq);
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        waitq_sleep(&THREAD->go_wq);
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    } else {
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    } else {
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        spinlock_unlock(&THREAD->lock);
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        spinlock_unlock(&THREAD->debug_lock);
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        interrupts_restore(ipl);
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        interrupts_restore(ipl);
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    }
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    }
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}
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}
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/** @}
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/** @}