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For long-running fuzzing processes, we eventually end up with many allocated sparse-mem pages. To avoid this, clear the allocated pages on system-reset. Signed-off-by: Alexander Bulekov Reviewed-by: Darren Kenny Reviewed-by: Philippe Mathieu-Daud=C3=A9 --- hw/mem/sparse-mem.c | 13 ++++++++++++- 1 file changed, 12 insertions(+), 1 deletion(-) diff --git a/hw/mem/sparse-mem.c b/hw/mem/sparse-mem.c index e6640eb8e7..72f038d47d 100644 --- a/hw/mem/sparse-mem.c +++ b/hw/mem/sparse-mem.c @@ -77,6 +77,13 @@ static void sparse_mem_write(void *opaque, hwaddr addr, = uint64_t v, =20 } =20 +static void sparse_mem_enter_reset(Object *obj, ResetType type) +{ + SparseMemState *s =3D SPARSE_MEM(obj); + g_hash_table_remove_all(s->mapped); + return; +} + static const MemoryRegionOps sparse_mem_ops =3D { .read =3D sparse_mem_read, .write =3D sparse_mem_write, @@ -123,7 +130,8 @@ static void sparse_mem_realize(DeviceState *dev, Error = **errp) =20 assert(s->baseaddr + s->length > s->baseaddr); =20 - s->mapped =3D g_hash_table_new(NULL, NULL); + s->mapped =3D g_hash_table_new_full(NULL, NULL, NULL, + (GDestroyNotify)g_free); memory_region_init_io(&s->mmio, OBJECT(s), &sparse_mem_ops, s, "sparse-mem", s->length); sysbus_init_mmio(sbd, &s->mmio); @@ -131,12 +139,15 @@ static void sparse_mem_realize(DeviceState *dev, Erro= r **errp) =20 static void sparse_mem_class_init(ObjectClass *klass, void *data) { + ResettableClass *rc =3D RESETTABLE_CLASS(klass); DeviceClass *dc =3D DEVICE_CLASS(klass); =20 device_class_set_props(dc, sparse_mem_properties); =20 dc->desc =3D "Sparse Memory Device"; dc->realize =3D sparse_mem_realize; + + rc->phases.enter =3D sparse_mem_enter_reset; } =20 static const TypeInfo sparse_mem_types[] =3D { --=20 2.39.0