Re: [PATCH for-9.2 1/6] hw/misc/xlnx-versal-cfu: destroy fifo in finalize

[Alistair Francis]

On Fri, Aug 23, 2024 at 2:22 AM Peter Maydell <peter.maydell@linaro.org> wrote:
>
> Since the TYPE_XNLX_VERSAL_CFU_FDRO device creates a FIFO in its
> instance_init method, we must destroy the FIFO in instance_finalize
> to avoid a memory leak for the QOM introspection
> "instantiate-examine-finalize" cycle:
>
> Direct leak of 8192 byte(s) in 1 object(s) allocated from:
>     #0 0x55ec89eae7ee in malloc 
> (/mnt/nvmedisk/linaro/qemu-from-laptop/qemu/build/asan/qemu-system-aarch64+0x294d7ee)
>  (BuildId: 6d508874816cc47d17c8dd775e8f809ae520e8cb)
>     #1 0x7f697018f738 in g_malloc debian/build/deb/../../../glib/gmem.c:128:13
>     #2 0x55ec8d98d98d in fifo8_create util/fifo8.c:27:18
>     #3 0x55ec8aa2a624 in fifo32_create 
> /mnt/nvmedisk/linaro/qemu-from-laptop/qemu/include/qemu/fifo32.h:35:5
>     #4 0x55ec8aa2a33c in cfu_fdro_init hw/misc/xlnx-versal-cfu.c:397:5
>     #5 0x55ec8ce75da1 in object_init_with_type qom/object.c:420:9
>     #6 0x55ec8ce5d07b in object_initialize_with_type qom/object.c:562:5
>     #7 0x55ec8ce5e91d in object_new_with_type qom/object.c:782:5
>     #8 0x55ec8ce5e9f1 in object_new qom/object.c:797:12
>     #9 0x55ec8d65c81d in qmp_device_list_properties qom/qom-qmp-cmds.c:144:11
>
> Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

Reviewed-by: Alistair Francis <alistair.francis@wdc.com>

Alistair

> ---
>  hw/misc/xlnx-versal-cfu.c | 8 ++++++++
>  1 file changed, 8 insertions(+)
>
> diff --git a/hw/misc/xlnx-versal-cfu.c b/hw/misc/xlnx-versal-cfu.c
> index 6bb82e51c15..2284b407eab 100644
> --- a/hw/misc/xlnx-versal-cfu.c
> +++ b/hw/misc/xlnx-versal-cfu.c
> @@ -397,6 +397,13 @@ static void cfu_fdro_init(Object *obj)
>      fifo32_create(&s->fdro_data, 8 * KiB / sizeof(uint32_t));
>  }
>
> +static void cfu_fdro_finalize(Object *obj)
> +{
> +    XlnxVersalCFUFDRO *s = XLNX_VERSAL_CFU_FDRO(obj);
> +
> +    fifo32_destroy(&s->fdro_data);
> +}
> +
>  static void cfu_fdro_reset_enter(Object *obj, ResetType type)
>  {
>      XlnxVersalCFUFDRO *s = XLNX_VERSAL_CFU_FDRO(obj);
> @@ -539,6 +546,7 @@ static const TypeInfo cfu_fdro_info = {
>      .instance_size = sizeof(XlnxVersalCFUFDRO),
>      .class_init    = cfu_fdro_class_init,
>      .instance_init = cfu_fdro_init,
> +    .instance_finalize = cfu_fdro_finalize,
>      .interfaces = (InterfaceInfo[]) {
>          { TYPE_XLNX_CFI_IF },
>          { }
> --
> 2.34.1
>
>