Re: [PATCH for-9.2 3/6] hw/nvram/xlnx-bbram: Call register_finalize_block

[Francisco Iglesias]

On Thu, Aug 22, 2024 at 05:21:24PM +0100, Peter Maydell wrote:
> The TYPE_XLNX_BBRAM device creates a register block with
> register_init_block32() in its instance_init method; we must
> therefore destroy it in our instance_finalize method to avoid a leak
> in the QOM introspection "init-inspect-finalize" lifecycle:
> 
> Direct leak of 304 byte(s) in 1 object(s) allocated from:
>     #0 0x5641518ca9d8 in __interceptor_calloc 
> (/mnt/nvmedisk/linaro/qemu-from-laptop/qemu/build/asan/qemu-system-aarch64+0x294d9d8)
>  (BuildId: 4a6
> 18cb63d57d5a19ed45cfc262b08da47eaafe5)
>     #1 0x7ff1aab31c50 in g_malloc0 
> debian/build/deb/../../../glib/gmem.c:161:13
>     #2 0x564151cffc5d in register_init_block hw/core/register.c:248:34
>     #3 0x564151d006be in register_init_block32 hw/core/register.c:299:12
>     #4 0x56415293df75 in bbram_ctrl_init hw/nvram/xlnx-bbram.c:462:9
>     #5 0x564154891dc1 in object_init_with_type qom/object.c:420:9
>     #6 0x56415487909b in object_initialize_with_type qom/object.c:562:5
>     #7 0x56415487a93d in object_new_with_type qom/object.c:782:5
>     #8 0x56415487aa11 in object_new qom/object.c:797:12
>     #9 0x56415507883d in qmp_device_list_properties qom/qom-qmp-cmds.c:144:11
> 
> Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

Reviewed-by: Francisco Iglesias <francisco.iglesias@amd.com>


> ---
>  include/hw/nvram/xlnx-bbram.h |  1 +
>  hw/nvram/xlnx-bbram.c         | 13 ++++++++++---
>  2 files changed, 11 insertions(+), 3 deletions(-)
> 
> diff --git a/include/hw/nvram/xlnx-bbram.h b/include/hw/nvram/xlnx-bbram.h
> index 6fc13f8cc17..bce8e89d905 100644
> --- a/include/hw/nvram/xlnx-bbram.h
> +++ b/include/hw/nvram/xlnx-bbram.h
> @@ -47,6 +47,7 @@ struct XlnxBBRam {
>      bool bbram8_wo;
>      bool blk_ro;
>  
> +    RegisterInfoArray *reg_array;
>      uint32_t regs[RMAX_XLNX_BBRAM];
>      RegisterInfo regs_info[RMAX_XLNX_BBRAM];
>  };
> diff --git a/hw/nvram/xlnx-bbram.c b/hw/nvram/xlnx-bbram.c
> index 09575a77d77..1bc58e90ad0 100644
> --- a/hw/nvram/xlnx-bbram.c
> +++ b/hw/nvram/xlnx-bbram.c
> @@ -456,9 +456,8 @@ static void bbram_ctrl_init(Object *obj)
>  {
>      XlnxBBRam *s = XLNX_BBRAM(obj);
>      SysBusDevice *sbd = SYS_BUS_DEVICE(obj);
> -    RegisterInfoArray *reg_array;
>  
> -    reg_array =
> +    s->reg_array =
>          register_init_block32(DEVICE(obj), bbram_ctrl_regs_info,
>                                ARRAY_SIZE(bbram_ctrl_regs_info),
>                                s->regs_info, s->regs,
> @@ -466,10 +465,17 @@ static void bbram_ctrl_init(Object *obj)
>                                XLNX_BBRAM_ERR_DEBUG,
>                                R_MAX * 4);
>  
> -    sysbus_init_mmio(sbd, &reg_array->mem);
> +    sysbus_init_mmio(sbd, &s->reg_array->mem);
>      sysbus_init_irq(sbd, &s->irq_bbram);
>  }
>  
> +static void bbram_ctrl_finalize(Object *obj)
> +{
> +    XlnxBBRam *s = XLNX_BBRAM(obj);
> +
> +    register_finalize_block(s->reg_array);
> +}
> +
>  static void bbram_prop_set_drive(Object *obj, Visitor *v, const char *name,
>                                   void *opaque, Error **errp)
>  {
> @@ -537,6 +543,7 @@ static const TypeInfo bbram_ctrl_info = {
>      .instance_size = sizeof(XlnxBBRam),
>      .class_init    = bbram_ctrl_class_init,
>      .instance_init = bbram_ctrl_init,
> +    .instance_finalize = bbram_ctrl_finalize,
>  };
>  
>  static void bbram_ctrl_register_types(void)
> -- 
> 2.34.1
>