Re: [Qemu-devel] [PATCH memory v2 3/3] memory: Lazy init name from QOM name as needed

[Paolo Bonzini]

Il 26/08/2014 05:10, Peter Crosthwaite ha scritto:
> To support name retrieval of MemoryRegions that were created
> dynamically (that is, not via memory_region_init and friends). We
> cache the name in MemoryRegion's state as
> object_get_canonical_path_component mallocs the returned value
> so it's not suitable for direct return to callers. Memory already
> frees the name field, so this will be garbage collected along with
> the MR object.
> 
> Signed-off-by: Peter Crosthwaite <address@hidden>
> ---
> 
>  memory.c | 5 ++++-
>  1 file changed, 4 insertions(+), 1 deletion(-)
> 
> diff --git a/memory.c b/memory.c
> index 42317a2..fc16e5f 100644
> --- a/memory.c
> +++ b/memory.c
> @@ -914,7 +914,6 @@ void memory_region_init(MemoryRegion *mr,
>      if (size == UINT64_MAX) {
>          mr->size = int128_2_64();
>      }
> -    mr->name = g_strdup(name);

This causes a bunch of [0] to appear in the "info mtree" output.
They're a bit ugly, so I'm removing this line for now.

Paolo

>      if (name) {
>          object_property_add_child_array(owner, name, OBJECT(mr));
> @@ -1309,6 +1308,10 @@ uint64_t memory_region_size(MemoryRegion *mr)
>  
>  const char *memory_region_name(const MemoryRegion *mr)
>  {
> +    if (!mr->name) {
> +        ((MemoryRegion *)mr)->name =
> +            object_get_canonical_path_component(OBJECT(mr));
> +    }
>      return mr->name;
>  }
>  
>