Re: [PATCH v6 5/5] accel: abort if we fail to load the accelerator plugin

["Philippe Mathieu-Daudé via" <qemu-devel@nongnu.org>]

On 24/9/22 01:21, Claudio Fontana wrote:
> if QEMU is configured with modules enabled, it is possible that the
> load of an accelerator module will fail.
> Abort in this case, relying on module_object_class_by_name to report
> the specific load error if any.
> 
> Signed-off-by: Claudio Fontana <cfontana@suse.de>
> Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
> ---
>   accel/accel-softmmu.c | 8 +++++++-
>   1 file changed, 7 insertions(+), 1 deletion(-)
> 
> diff --git a/accel/accel-softmmu.c b/accel/accel-softmmu.c
> index 67276e4f52..9fa4849f2c 100644
> --- a/accel/accel-softmmu.c
> +++ b/accel/accel-softmmu.c
> @@ -66,6 +66,7 @@ void accel_init_ops_interfaces(AccelClass *ac)
>   {
>       const char *ac_name;
>       char *ops_name;
> +    ObjectClass *oc;
>       AccelOpsClass *ops;
>   
>       ac_name = object_class_get_name(OBJECT_CLASS(ac));
> @@ -73,8 +74,13 @@ void accel_init_ops_interfaces(AccelClass *ac)
>   
>       ops_name = g_strdup_printf("%s" ACCEL_OPS_SUFFIX, ac_name);
>       ops = ACCEL_OPS_CLASS(module_object_class_by_name(ops_name));
> +    oc = module_object_class_by_name(ops_name);
> +    if (!oc) {
> +        error_report("fatal: could not load module for type '%s'", ops_name);
> +        abort();

I still think a coredump won't help at all to figure the problem here: a 
module is missing, we know its name. Anyhow I don't mind much, and this
can be cleaned later, so:

Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>

> +    }
>       g_free(ops_name);
> -
> +    ops = ACCEL_OPS_CLASS(oc);
>       /*
>        * all accelerators need to define ops, providing at least a mandatory
>        * non-NULL create_vcpu_thread operation.