[PATCH 08/12] gcov: Add functions to dump the gcov information

Sebastian Huber sebastian.huber at embedded-brains.de
Fri Jul 1 05:59:24 UTC 2022

On 01.07.22 07:48, Chris Johns wrote:
> On 1/7/2022 3:00 pm, Sebastian Huber wrote:
>> On 01.07.22 02:37, Chris Johns wrote:
>>>> +void _IO_Gcov_dump_info_base64( IO_Put_char put_char, void *arg );
>>>> +
>>> Why just a per char interface? Given this is in the score a buffer plus length
>>> interface would make more sense? It would make the interface more efficient.
>> All the test output uses a single char output function. This is also used by
>> _IO_Base64().
> That is a shame. Are you saying it is a lot of work to change?

I don't see a need for change. These are internal functions. They are 
not part of the API.

>>> The per char could be a convenience function version of the buffer and length
>>> call for those use cases than want it, ie ....
>>>> +static void _IO_Gcov_dump( const void *data, unsigned length, void *arg )
>> If you really need this, you can call the libgcov functions directly.
> The title of this patch to the "score" says ...
>   "gcov: Add functions to dump the gcov information"
> If I have a large app and want to use this support am I restricted to a per
> character interface rather than a buffer and length or I implement this again
> directly? I am not sure I understand the purpose of this code in the score?

The purpose of the score functions are to provide an implementation for 
rtems_test_gcov_dump_info(). The RTEMS test suite simply requires a 
character output function.

> Is ESA going to use this gcov coverage for their applications?

They used gcov in the past with lots of local hacks.

>> I can move the linker set definition to a separate file.
> I do not know how this relates.

If we move the RTEMS_LINKER_ROSET( gcov_info, const struct gcov_info * 
); definition to a separate file, you can use __gcov_info_to_gcda() in 
your application with a custom dump function.

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