[Mesa-dev] [PATCH] st/mesa: fix sampler_view REALLOC/FREE macro mix-up

[Christian König]

Am 10.04.2014 03:26, schrieb Brian Paul:
> We were using REALLOC() from u_memory.h but FREE() from imports.h.
> This mismatch caused us to trash the heap on Windows after we
> deleted a texture object.
>
> This fixes a regression from commit 6c59be7776e4d.

Reviewed-by: Christian König <christian.koenig at amd.com>

> ---
>   src/mesa/state_tracker/st_cb_texture.c |    2 +-
>   src/mesa/state_tracker/st_texture.c    |   12 ++++++++++++
>   src/mesa/state_tracker/st_texture.h    |    3 +++
>   3 files changed, 16 insertions(+), 1 deletion(-)
>
> diff --git a/src/mesa/state_tracker/st_cb_texture.c b/src/mesa/state_tracker/st_cb_texture.c
> index 353415b..304dc91 100644
> --- a/src/mesa/state_tracker/st_cb_texture.c
> +++ b/src/mesa/state_tracker/st_cb_texture.c
> @@ -155,7 +155,7 @@ st_DeleteTextureObject(struct gl_context *ctx,
>   
>      pipe_resource_reference(&stObj->pt, NULL);
>      st_texture_release_all_sampler_views(stObj);
> -   FREE(stObj->sampler_views);
> +   st_texture_free_sampler_views(stObj);
>      _mesa_delete_texture_object(ctx, texObj);
>   }
>   
> diff --git a/src/mesa/state_tracker/st_texture.c b/src/mesa/state_tracker/st_texture.c
> index 8d559df..cfa0605 100644
> --- a/src/mesa/state_tracker/st_texture.c
> +++ b/src/mesa/state_tracker/st_texture.c
> @@ -483,3 +483,15 @@ st_texture_release_all_sampler_views(struct st_texture_object *stObj)
>      for (i = 0; i < stObj->num_sampler_views; ++i)
>         pipe_sampler_view_reference(&stObj->sampler_views[i], NULL);
>   }
> +
> +
> +void
> +st_texture_free_sampler_views(struct st_texture_object *stObj)
> +{
> +   /* NOTE:
> +    * We use FREE() here to match REALLOC() above.  Both come from
> +    * u_memory.h, not imports.h.  If we mis-match MALLOC/FREE from
> +    * those two headers we can trash the heap.
> +    */
> +   FREE(stObj->sampler_views);
> +}
> diff --git a/src/mesa/state_tracker/st_texture.h b/src/mesa/state_tracker/st_texture.h
> index 87de9f9..f2afaf1 100644
> --- a/src/mesa/state_tracker/st_texture.h
> +++ b/src/mesa/state_tracker/st_texture.h
> @@ -241,4 +241,7 @@ st_texture_release_sampler_view(struct st_context *st,
>   extern void
>   st_texture_release_all_sampler_views(struct st_texture_object *stObj);
>   
> +void
> +st_texture_free_sampler_views(struct st_texture_object *stObj);
> +
>   #endif