[jira] [Updated] (ZOOKEEPER-4299) List head do not initialize before using it in zoo_amulti that will cause segment errors.

["hong (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/ZOOKEEPER-4299?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

hong updated ZOOKEEPER-4299:
----------------------------
    Summary: List head do not initialize before using it in zoo_amulti that will cause segment errors.  (was: list head do not initialize before us it in zoo_amulti that will cause segment errors.)

> List head do not initialize before using it in zoo_amulti that will cause segment errors.
> -----------------------------------------------------------------------------------------
>
>                 Key: ZOOKEEPER-4299
>                 URL: https://issues.apache.org/jira/browse/ZOOKEEPER-4299
>             Project: ZooKeeper
>          Issue Type: Bug
>          Components: c client
>    Affects Versions: 3.5.4, 3.7.0, 3.6.2
>            Reporter: hong
>            Priority: Blocker
>   Original Estimate: 2h
>  Remaining Estimate: 2h
>
> int zoo_amulti(zhandle_t *zh, int count, const zoo_op_t *ops,
>  zoo_op_result_t *results, void_completion_t completion, const void *data)
> {
>  struct RequestHeader h = \{get_xid(), ZOO_MULTI_OP};
>  struct MultiHeader mh = \{-1, 1, -1};
>  struct oarchive *oa = create_buffer_oarchive();
>  {color:#FF0000}completion_head_t clist = \{ 0 }; // not initialize for cond or lock{color}
> int rc = serialize_RequestHeader(oa, "header", &h);
> ....
>  
> {color:#FF0000}queue_completion(&clist, entry, 0); //queue it will segment errors{color}
>  
>  
> // do lock or unlock which have not been initialized!!
> static void queue_completion(completion_head_t *list, completion_list_t *c,
>         int add_to_front)
> {
>     lock_completion_list(list);
>     queue_completion_nolock(list, c, add_to_front);
>     unlock_completion_list(list);
> }
> // oh my god!!
> int unlock_completion_list(completion_head_t *l)
> {
>     p_thread_cond_broadcast(&l->cond);
>     return p_thread_mutex_unlock(&l->lock);
> }



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