Re: [Xen-devel] [PATCH] tools/xenconsoled: Initialise static data before use

[Andrew Cooper <andrew.cooper3@xxxxxxxxxx>]

On 07/03/13 18:45, Andrew Cooper wrote:
> 'fds' and 'current_array_size' are used in a memset() in reset_fds(), and for
> the first call to set_fds() before being initialised.
>
> Also initialise nr_fds for sanity sake.
>
> This is another regression introduced by
>
> "Switch from select() to poll() in xenconsoled's IO loop."
>   hg c/s 26405:7359c3122c5d
>   git cc5434c933153c4b8812d1df901f8915c22830a8
>
> Signed-off-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
> Signed-off-by: Marcus Granado <marcus.granado@xxxxxxxxxx>
>
> ---
>
> This is still not enough to fix the issue of xenconsoled exiting after 384
> VMs, but does allow us to reliably reach the 383rd VM.

On second thoughts, memset(NULL, 0, 0); is still silly.   I shall resin
tomorrow.

~Andrew

>
> diff -r 94ece33caae2 -r 803a5869bfb5 tools/console/daemon/io.c
> --- a/tools/console/daemon/io.c
> +++ b/tools/console/daemon/io.c
> @@ -70,9 +70,9 @@ static int log_hv_fd = -1;
>  
>  static xc_gnttab *xcg_handle = NULL;
>  
> -static struct pollfd  *fds;
> -static unsigned int current_array_size;
> -static unsigned int nr_fds;
> +static struct pollfd  *fds = NULL;
> +static unsigned int current_array_size = 0;
> +static unsigned int nr_fds = 0;
>  
>  #define ROUNDUP(_x,_w) (((unsigned long)(_x)+(1UL<<(_w))-1) & 
> ~((1UL<<(_w))-1))
>  
>
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