Re: [Xen-devel] [RFC v2 6/9] scripts: add coccinelle script to use auto propagated errp

[Eric Blake <eblake@xxxxxxxxxx>]

On 9/23/19 3:05 PM, Eric Blake wrote:

> Does running this Coccinelle script 2 times in a row add a second
> ERRP_FUNCTION_BEGIN() line?  We want it to be idempotent (no changes on
> a second run).  (Admittedly, I did not actually test that yet).  Also, I
> don't know if this can be tweaked to avoid adding the line to a function
> with an empty body, maybe:
> 
>  fn(..., Error **errp, ...)
>  {
> +    ERRP_FUNCTION_BEGIN();
>      ...
>  }

Also untested:

 fn(..., Error **errp, ...)
 {
(
|
     ERRP_FUNCTION_BEGIN();
     ...
|
+    ERRP_FUNCTION_BEGIN()
     ...
)
 }


> Overall, the script makes sense in my reading (but no idea if it
> actually catches everything we want, or if it missed something).

Having spot-checked 7, it definitely misses cases where it was supposed
to add ERRP_FUNCTION_BEGIN().

-- 
Eric Blake, Principal Software Engineer
Red Hat, Inc.           +1-919-301-3226
Virtualization:  qemu.org | libvirt.org

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