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Address space creation/deletion implemented

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- Proper releasing of user pmd and pgds when a space is not used.
- Proper releasing of task, space ids.

- At occasions a starting thread gets bogus SPSR, this needs investigating.
- At a very rare occasion arch_setup_new_thread() had a kernel data abort during
  register copying from one task to another. Needs investigating.
This commit is contained in:
Bahadir Balban
2009-05-11 12:10:12 +03:00
parent 7415546410
commit 1b04037034
7 changed files with 95 additions and 55 deletions
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25
src/generic/tcb.c
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@@ -75,6 +75,7 @@ void tcb_delete(struct ktcb *tcb)
BUG_ON(tcb->wqh_recv.sleepers > 0);
BUG_ON(!list_empty(&tcb->task_list));
BUG_ON(!list_empty(&tcb->rq_list));
BUG_ON(tcb->rq);
BUG_ON(tcb->nlocks);
BUG_ON(tcb->waiting_on);
BUG_ON(tcb->wq);
@@ -87,15 +88,35 @@ void tcb_delete(struct ktcb *tcb)
BUG_ON(--tcb->space->ktcb_refs < 0);
/* No refs left for the space, delete it */
if (tcb->space->ktcb_refs == 0)
if (tcb->space->ktcb_refs == 0) {
address_space_remove(tcb->space);
address_space_delete(tcb->space);
}
address_space_reference_unlock();
/* Deallocate tcb ids */
id_del(thread_id_pool, tcb->tid);
/* Free the tcb */
free_page(tcb);
}
struct ktcb *tcb_find_by_space(l4id_t spid)
{
struct ktcb *task;
spin_lock(&ktcb_list.list_lock);
list_for_each_entry(task, &ktcb_list.list, task_list) {
if (task->space->spid == spid) {
spin_unlock(&ktcb_list.list_lock);
return task;
}
}
spin_unlock(&ktcb_list.list_lock);
return 0;
}
struct ktcb *tcb_find(l4id_t tid)
{
struct ktcb *task;
@@ -115,6 +136,7 @@ void tcb_add(struct ktcb *new)
{
spin_lock(&ktcb_list.list_lock);
BUG_ON(!list_empty(&new->task_list));
BUG_ON(!++ktcb_list.count);
list_add(&new->task_list, &ktcb_list.list);
spin_unlock(&ktcb_list.list_lock);
}
@@ -123,6 +145,7 @@ void tcb_remove(struct ktcb *new)
{
spin_lock(&ktcb_list.list_lock);
BUG_ON(list_empty(&new->task_list));
BUG_ON(--ktcb_list.count < 0);
list_del_init(&new->task_list);
spin_unlock(&ktcb_list.list_lock);
}