Re: [Xen-devel] [PATCH 1/4] libxl: Use libxl_strdup instead of strdup on libxl_version_info

[Wei Liu <wei.liu2@xxxxxxxxxx>]

On Tue, Jan 26, 2016 at 04:30:57PM -0500, Konrad Rzeszutek Wilk wrote:
> The change is simple replace of raw strdup with a libxl variant.
> The benefit of that is the libxl variant has the extra
> behaviour of abort-on-alloc-fail - and will improve error handling.
> 
> libxl_version_info is a bit odd - it is a public function and as libxl.h
> mentions - the callers of libxl_ public function needs to call the appropiate
> _dispose() function.
> 
> "However libxl_get_version_info() is special and returns a cached
> result from the ctx which cannot and should not be freed (as evidenced
> by it returning a const struct). This data is freed in libxl_ctx_free()
> by calling libxl_version_info_dispose(). This is why none of the callers
> remember to free -- they shouldn't be doing so." (Ian Campbell)
> 
> So the patch makes sure to use the NOGC.
> 
> Suggested-by: Wei Liu <wei.liu2@xxxxxxxxxx>
> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>

Acked-by: Wei Liu <wei.liu2@xxxxxxxxxx>

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