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Re: [libvirt] [PATCH v4 5/8] virmock.h: Introduce VIR_MOCK_CALL_STAT



On Fri, May 13, 2016 at 14:32:06 +0200, Michal Privoznik wrote:
> There is some magic going on when it comes to stat() or lstat().
> Basically, stat() can either be a regular function, an inline
> function that calls __xstat(_STAT_VER, ...) or a macro that does
> the same as the inline func. Don't ask why is that, just read the
> documentation in sys/stat.h and make sure you have a bucket next
> to you. Anyway, currently there will not be both stat and __xstat
> symbols at the same time, as one of them gets overwritten to the
> other one during compilation. But this is not true anymore once
> we start chaining our mocking libraries. Therefore we need a
> wrapper that calls desired function from glibc.
> 
> Signed-off-by: Michal Privoznik <mprivozn redhat com>
> ---
>  tests/vircgroupmock.c | 14 +++++++-------
>  tests/virmock.h       | 23 +++++++++++++++++++++++
>  tests/virpcimock.c    | 19 +++++++++----------
>  3 files changed, 39 insertions(+), 17 deletions(-)
> 

[...]

> diff --git a/tests/virmock.h b/tests/virmock.h
> index 62a7c8f..27c03ba 100644
> --- a/tests/virmock.h
> +++ b/tests/virmock.h
> @@ -254,6 +255,28 @@
>      static void (*real_##name)(void);                                   \
>      void name(void)
>  
> +static inline int
> +callStat(int (*realStat)(const char *, struct stat *),
> +         int (*realXstat)(int, const char *, struct stat *),

This is a bit ugly, but it's in the mock code and I don't know of a
better option.

ACK

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