"Can't obtain network semaphore"

[Ian Caddy]

What would happen if the network semaphore object id was corrupted.  It 
wouldn't even get to the section of code to get the mutex, but would 
return on invalid ID error when it tried to get the object.

Steve did not mention what the actual return code from the call to the 
semaphore get, does it correspond to the internal return code of 4? 
This could have been returned from another earlier function call.

Steve, what was the actual sc return code before it called the rtems_panic?

Ian Caddy


Till Straumann wrote:
> Chris Johns wrote:
> 
>> Till Straumann wrote:
>>
>>>
>>> Are you sure none of those deletes the network semaphore?
>>>
>>
>> If you have RTEMS_FAST_MUTEX defined the semaphore directly accesses 
>> the score for the mutex. This means _CORE_mutex_Surrender is being 
>> called.
>>
> 
> Sure - but this doesn't matter. His system panics because
> _CORE_mutex_Seize leaves with a return_code=='4' (CORE_MUTEX_WAS_DELETED)
> 
> The only way I currently can think of this getting there is
> by someone calling rtems_semaphore_delete() on the network
> semaphore id.
> 
> -- T.
> 
>