Re: [Qemu-devel] [PATCH v3 15/17] hw/arm/stm32f205_soc: Fix introspection problem with 'stm32f205-soc' device

[Alistair Francis]

On Mon, Jul 16, 2018 at 5:59 AM, Thomas Huth <address@hidden> wrote:
> Valgrind complains:
>
> echo "{'execute':'qmp_capabilities'} {'execute':'device-list-properties'," \
>  "'arguments':{'typename':'stm32f205-soc'}}" \
>  "{'execute': 'human-monitor-command', " \
>  "'arguments': {'command-line': 'info qtree'}}" | \
>  valgrind -q aarch64-softmmu/qemu-system-aarch64 -M none,accel=qtest -qmp 
> stdio
> [...]
> ==28531== Invalid read of size 8
> ==28531==    at 0x6185BA: qdev_print (qdev-monitor.c:686)
> ==28531==    by 0x6185BA: qbus_print (qdev-monitor.c:719)
> ==28531==    by 0x452B38: handle_hmp_command (monitor.c:3446)
> [...]
>
> Fix it with the new sysbus_init_child_obj() function.
>
> Signed-off-by: Thomas Huth <address@hidden>

Reviewed-by: Alistair Francis <address@hidden>

Alistair

> ---
>  hw/arm/stm32f205_soc.c | 28 ++++++++++++----------------
>  1 file changed, 12 insertions(+), 16 deletions(-)
>
> diff --git a/hw/arm/stm32f205_soc.c b/hw/arm/stm32f205_soc.c
> index 2b2135d..c486d06 100644
> --- a/hw/arm/stm32f205_soc.c
> +++ b/hw/arm/stm32f205_soc.c
> @@ -49,36 +49,32 @@ static void stm32f205_soc_initfn(Object *obj)
>      STM32F205State *s = STM32F205_SOC(obj);
>      int i;
>
> -    object_initialize(&s->armv7m, sizeof(s->armv7m), TYPE_ARMV7M);
> -    qdev_set_parent_bus(DEVICE(&s->armv7m), sysbus_get_default());
> +    sysbus_init_child_obj(obj, "armv7m", &s->armv7m, sizeof(s->armv7m),
> +                          TYPE_ARMV7M);
>
> -    object_initialize(&s->syscfg, sizeof(s->syscfg), TYPE_STM32F2XX_SYSCFG);
> -    qdev_set_parent_bus(DEVICE(&s->syscfg), sysbus_get_default());
> +    sysbus_init_child_obj(obj, "syscfg", &s->syscfg, sizeof(s->syscfg),
> +                          TYPE_STM32F2XX_SYSCFG);
>
>      for (i = 0; i < STM_NUM_USARTS; i++) {
> -        object_initialize(&s->usart[i], sizeof(s->usart[i]),
> -                          TYPE_STM32F2XX_USART);
> -        qdev_set_parent_bus(DEVICE(&s->usart[i]), sysbus_get_default());
> +        sysbus_init_child_obj(obj, "usart[*]", &s->usart[i],
> +                              sizeof(s->usart[i]), TYPE_STM32F2XX_USART);
>      }
>
>      for (i = 0; i < STM_NUM_TIMERS; i++) {
> -        object_initialize(&s->timer[i], sizeof(s->timer[i]),
> -                          TYPE_STM32F2XX_TIMER);
> -        qdev_set_parent_bus(DEVICE(&s->timer[i]), sysbus_get_default());
> +        sysbus_init_child_obj(obj, "timer[*]", &s->timer[i],
> +                              sizeof(s->timer[i]), TYPE_STM32F2XX_TIMER);
>      }
>
>      s->adc_irqs = OR_IRQ(object_new(TYPE_OR_IRQ));
>
>      for (i = 0; i < STM_NUM_ADCS; i++) {
> -        object_initialize(&s->adc[i], sizeof(s->adc[i]),
> -                          TYPE_STM32F2XX_ADC);
> -        qdev_set_parent_bus(DEVICE(&s->adc[i]), sysbus_get_default());
> +        sysbus_init_child_obj(obj, "adc[*]", &s->adc[i], sizeof(s->adc[i]),
> +                              TYPE_STM32F2XX_ADC);
>      }
>
>      for (i = 0; i < STM_NUM_SPIS; i++) {
> -        object_initialize(&s->spi[i], sizeof(s->spi[i]),
> -                          TYPE_STM32F2XX_SPI);
> -        qdev_set_parent_bus(DEVICE(&s->spi[i]), sysbus_get_default());
> +        sysbus_init_child_obj(obj, "spi[*]", &s->spi[i], sizeof(s->spi[i]),
> +                              TYPE_STM32F2XX_SPI);
>      }
>  }
>
> --
> 1.8.3.1
>
>