Re: [Xen-devel] potential bug in "xm atropos" implementation

[Christian Limpach <Christian.Limpach@xxxxxxxxxxxx>]

On Mon, Oct 18, 2004 at 03:21:38PM -0700, Diwaker Gupta wrote:
> From tools/libxc/xc_atropos.c:
> 
> int xc_atropos_domain_set(int xc_handle,
>                           u32 domid, u64 period, u64 slice, u64 latency,
>                           int xtratime)
> 
> which takes 6 arguments
> 
> From tools/python/xen/xm/main.py:
> class ProgAtropos(Prog):
> <snip>
>     def main(self, args):
>         if len(args) != 5: self.err("%s: Invalid argument(s)" % args[0])
>         dom = args[1]
>         v = map(int, args[2:5])
>         server.xend_domain_cpu_atropos_set(dom, *v)
> 
> Now if you specify all 6 arguments on the command line, xm atropos
> fails with "Invalid arguments" due to the above code. If you give 5
> arguments, ProgAtropos fails since the corresponding libxc function
> call takes 6 arguments.

No, the 6th argument you see in the xc_atropos_domain_set function
signature (i.e. the function's 1st argument -- xc_handle) is added
in the Pyhton<->xc interface function pyxc_atropos_domain_set
(in tools/python/xen/lowlevel/xc/xc.c).

    christian



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