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Re: [Qemu-devel] [PATCH 02/11] qom: detect bad reentrance during object_
From: |
Peter Crosthwaite |
Subject: |
Re: [Qemu-devel] [PATCH 02/11] qom: detect bad reentrance during object_class_foreach |
Date: |
Sat, 14 Dec 2013 16:53:03 +1000 |
On Fri, Dec 13, 2013 at 10:44 PM, Igor Mammedov <address@hidden> wrote:
> From: Hervé Poussineau <address@hidden>
>
> We should not modify the type hash table while it is being iterated on.
> Assert that it does not happen.
>
> Signed-off-by: Hervé Poussineau <address@hidden>
> Signed-off-by: Paolo Bonzini <address@hidden>
> Signed-off-by: Igor Mammedov <address@hidden>
> ---
> v2:
> * make ver more descriptinve s/enumerating/enumerating_classes/
> [asked-by: Peter Crosthwaite]
> ---
> qom/object.c | 4 ++++
> 1 file changed, 4 insertions(+)
>
> diff --git a/qom/object.c b/qom/object.c
> index 3a43186..4a0fb86 100644
> --- a/qom/object.c
> +++ b/qom/object.c
> @@ -78,8 +78,10 @@ static GHashTable *type_table_get(void)
> return type_table;
> }
>
> +static bool enumerating_classes = false;
This seems to be a change in terminology i.e. s/type/class. Should it
be enumerating_types or enumerating_type_table?
Also blank line here between global var decl and fn.
Otherwise,
Reviewed-by: Peter Crosthwaite <address@hidden>
Regards,
Peter
> static void type_table_add(TypeImpl *ti)
> {
> + assert(!enumerating_classes);
> g_hash_table_insert(type_table_get(), (void *)ti->name, ti);
> }
>
> @@ -666,7 +668,9 @@ void object_class_foreach(void (*fn)(ObjectClass *klass,
> void *opaque),
> {
> OCFData data = { fn, implements_type, include_abstract, opaque };
>
> + enumerating_classes = true;
> g_hash_table_foreach(type_table_get(), object_class_foreach_tramp,
> &data);
> + enumerating_classes = false;
> }
>
> int object_child_foreach(Object *obj, int (*fn)(Object *child, void *opaque),
> --
> 1.8.3.1
>
>