Changeset cd50486 in mainline for kernel/generic/src/proc/task.c

Timestamp:

2011-02-06T22:03:55Z (13 years ago)

Author:

Vojtech Horky <vojtechhorky@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

25971d2

Parents:

1110ebd (diff), 960ff451 (diff)
Note: this is a merge changeset, the changes displayed below correspond to the merge itself.
Use the (diff) links above to see all the changes relative to each parent.

Message:

Merge development/ changes

File:

• kernel/generic/src/proc/task.c (modified) (2 diffs)

kernel/generic/src/proc/task.c

@@ -384 +384 @@
 {
         task_id_t taskid;
-        int rc;
-
-        rc = copy_from_uspace(&taskid, uspace_taskid, sizeof(taskid));
+        int rc = copy_from_uspace(&taskid, uspace_taskid, sizeof(taskid));
         if (rc != 0)
                 return (sysarg_t) rc;
-
+        
         return (sysarg_t) task_kill(taskid);
 }
@@ -520 +518 @@
 }
 
+/** Kill the currently running task.
+ *
+ * @param notify Send out fault notifications.
+ *
+ * @return Zero on success or an error code from errno.h.
+ *
+ */
+void task_kill_self(bool notify)
+{
+        /*
+         * User space can subscribe for FAULT events to take action
+         * whenever a task faults (to take a dump, run a debugger, etc.).
+         * The notification is always available, but unless udebug is enabled,
+         * that's all you get.
+        */
+        if (notify) {
+                if (event_is_subscribed(EVENT_FAULT)) {
+                        /* Notify the subscriber that a fault occurred. */
+                        event_notify_3(EVENT_FAULT, LOWER32(TASK->taskid),
+                            UPPER32(TASK->taskid), (sysarg_t) THREAD);
+                
+#ifdef CONFIG_UDEBUG
+                        /* Wait for a debugging session. */
+                        udebug_thread_fault();
+#endif
+                }
+        }
+        
+        irq_spinlock_lock(&tasks_lock, true);
+        task_kill_internal(TASK);
+        irq_spinlock_unlock(&tasks_lock, true);
+        
+        thread_exit();
+}
+
+/** Process syscall to terminate the current task.
+ *
+ * @param notify Send out fault notifications.
+ *
+ */
+sysarg_t sys_task_exit(sysarg_t notify)
+{
+        task_kill_self(notify);
+        
+        /* Unreachable */
+        return EOK;
+}
+
 static bool task_print_walker(avltree_node_t *node, void *arg)
 {