* [PATCH v2] pl031: add finalize function to avoid memleaks
@ 2020-02-04 2:05 pannengyuan
2020-02-04 7:20 ` Philippe Mathieu-Daudé
0 siblings, 1 reply; 2+ messages in thread
From: pannengyuan @ 2020-02-04 2:05 UTC (permalink / raw)
To: peter.maydell
Cc: Euler Robot, qemu-arm, Pan Nengyuan, zhang.zhanghailiang, qemu-devel
From: Pan Nengyuan <pannengyuan@huawei.com>
There is a memory leak when we call 'device_list_properties' with
typename = pl031. It's easy to reproduce as follow:
virsh qemu-monitor-command vm1 --pretty '{"execute": "device-list-properties", "arguments": {"typename": "pl031"}}'
The memory leak stack:
Direct leak of 48 byte(s) in 1 object(s) allocated from:
#0 0x7f6e0925a970 in __interceptor_calloc (/lib64/libasan.so.5+0xef970)
#1 0x7f6e06f4d49d in g_malloc0 (/lib64/libglib-2.0.so.0+0x5249d)
#2 0x564a0f7654ea in timer_new_full /mnt/sdb/qemu/include/qemu/timer.h:530
#3 0x564a0f76555d in timer_new /mnt/sdb/qemu/include/qemu/timer.h:551
#4 0x564a0f765589 in timer_new_ns /mnt/sdb/qemu/include/qemu/timer.h:569
#5 0x564a0f76747d in pl031_init /mnt/sdb/qemu/hw/rtc/pl031.c:198
#6 0x564a0fd4a19d in object_init_with_type /mnt/sdb/qemu/qom/object.c:360
#7 0x564a0fd4b166 in object_initialize_with_type /mnt/sdb/qemu/qom/object.c:467
#8 0x564a0fd4c8e6 in object_new_with_type /mnt/sdb/qemu/qom/object.c:636
#9 0x564a0fd4c98e in object_new /mnt/sdb/qemu/qom/object.c:646
#10 0x564a0fc69d43 in qmp_device_list_properties /mnt/sdb/qemu/qom/qom-qmp-cmds.c:204
#11 0x564a0ef18e64 in qdev_device_help /mnt/sdb/qemu/qdev-monitor.c:278
Reported-by: Euler Robot <euler.robot@huawei.com>
Signed-off-by: Pan Nengyuan <pannengyuan@huawei.com>
---
Changes V2 to V1:
- Delay the timer_new until realize instead of putting it into instance_init, since the pl031 can't be hotplugged(suggested by Peter Maydell).
---
hw/rtc/pl031.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/hw/rtc/pl031.c b/hw/rtc/pl031.c
index ae47f09635..0b9253eb30 100644
--- a/hw/rtc/pl031.c
+++ b/hw/rtc/pl031.c
@@ -190,7 +190,11 @@ static void pl031_init(Object *obj)
qemu_get_timedate(&tm, 0);
s->tick_offset = mktimegm(&tm) -
qemu_clock_get_ns(rtc_clock) / NANOSECONDS_PER_SECOND;
+}
+static void pl031_realize(DeviceState *dev, Error **errp)
+{
+ PL031State *s = PL031(dev);
s->timer = timer_new_ns(rtc_clock, pl031_interrupt, s);
}
@@ -321,6 +325,7 @@ static void pl031_class_init(ObjectClass *klass, void *data)
DeviceClass *dc = DEVICE_CLASS(klass);
dc->vmsd = &vmstate_pl031;
+ dc->realize = pl031_realize;
device_class_set_props(dc, pl031_properties);
}
--
2.21.0.windows.1
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH v2] pl031: add finalize function to avoid memleaks
2020-02-04 2:05 [PATCH v2] pl031: add finalize function to avoid memleaks pannengyuan
@ 2020-02-04 7:20 ` Philippe Mathieu-Daudé
0 siblings, 0 replies; 2+ messages in thread
From: Philippe Mathieu-Daudé @ 2020-02-04 7:20 UTC (permalink / raw)
To: pannengyuan, peter.maydell
Cc: qemu-devel, qemu-arm, zhang.zhanghailiang, Euler Robot
On 2/4/20 3:05 AM, pannengyuan@huawei.com wrote:
> From: Pan Nengyuan <pannengyuan@huawei.com>
>
> There is a memory leak when we call 'device_list_properties' with
> typename = pl031. It's easy to reproduce as follow:
>
> virsh qemu-monitor-command vm1 --pretty '{"execute": "device-list-properties", "arguments": {"typename": "pl031"}}'
>
> The memory leak stack:
> Direct leak of 48 byte(s) in 1 object(s) allocated from:
> #0 0x7f6e0925a970 in __interceptor_calloc (/lib64/libasan.so.5+0xef970)
> #1 0x7f6e06f4d49d in g_malloc0 (/lib64/libglib-2.0.so.0+0x5249d)
> #2 0x564a0f7654ea in timer_new_full /mnt/sdb/qemu/include/qemu/timer.h:530
> #3 0x564a0f76555d in timer_new /mnt/sdb/qemu/include/qemu/timer.h:551
> #4 0x564a0f765589 in timer_new_ns /mnt/sdb/qemu/include/qemu/timer.h:569
> #5 0x564a0f76747d in pl031_init /mnt/sdb/qemu/hw/rtc/pl031.c:198
> #6 0x564a0fd4a19d in object_init_with_type /mnt/sdb/qemu/qom/object.c:360
> #7 0x564a0fd4b166 in object_initialize_with_type /mnt/sdb/qemu/qom/object.c:467
> #8 0x564a0fd4c8e6 in object_new_with_type /mnt/sdb/qemu/qom/object.c:636
> #9 0x564a0fd4c98e in object_new /mnt/sdb/qemu/qom/object.c:646
> #10 0x564a0fc69d43 in qmp_device_list_properties /mnt/sdb/qemu/qom/qom-qmp-cmds.c:204
> #11 0x564a0ef18e64 in qdev_device_help /mnt/sdb/qemu/qdev-monitor.c:278
>
> Reported-by: Euler Robot <euler.robot@huawei.com>
> Signed-off-by: Pan Nengyuan <pannengyuan@huawei.com>
> ---
> Changes V2 to V1:
> - Delay the timer_new until realize instead of putting it into instance_init, since the pl031 can't be hotplugged(suggested by Peter Maydell).
> ---
> hw/rtc/pl031.c | 5 +++++
> 1 file changed, 5 insertions(+)
>
> diff --git a/hw/rtc/pl031.c b/hw/rtc/pl031.c
> index ae47f09635..0b9253eb30 100644
> --- a/hw/rtc/pl031.c
> +++ b/hw/rtc/pl031.c
> @@ -190,7 +190,11 @@ static void pl031_init(Object *obj)
> qemu_get_timedate(&tm, 0);
> s->tick_offset = mktimegm(&tm) -
> qemu_clock_get_ns(rtc_clock) / NANOSECONDS_PER_SECOND;
> +}
>
> +static void pl031_realize(DeviceState *dev, Error **errp)
> +{
> + PL031State *s = PL031(dev);
> s->timer = timer_new_ns(rtc_clock, pl031_interrupt, s);
> }
>
> @@ -321,6 +325,7 @@ static void pl031_class_init(ObjectClass *klass, void *data)
> DeviceClass *dc = DEVICE_CLASS(klass);
>
> dc->vmsd = &vmstate_pl031;
> + dc->realize = pl031_realize;
> device_class_set_props(dc, pl031_properties);
> }
>
>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
^ permalink raw reply [flat|nested] 2+ messages in thread
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2020-02-04 7:20 ` Philippe Mathieu-Daudé
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