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| author | Alexander Bulekov <alxndr@bu.edu> | 2023-02-04 23:29:42 -0500 |
|---|---|---|
| committer | Alexander Bulekov <alxndr@bu.edu> | 2023-02-16 22:05:46 -0500 |
| commit | 66169c3c60af5014c1940de7491fdf090e5a090a (patch) | |
| tree | 28843189359e6e61de89937b5395d9f1df0758a9 /hw/mem/sparse-mem.c | |
| parent | 6dffbe36af79e26a4d23f94a9a1c1201de99c261 (diff) | |
| download | focaccia-qemu-66169c3c60af5014c1940de7491fdf090e5a090a.tar.gz focaccia-qemu-66169c3c60af5014c1940de7491fdf090e5a090a.zip | |
hw/sparse-mem: clear memory on reset
We use sparse-mem for fuzzing. 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 <alxndr@bu.edu> Reviewed-by: Darren Kenny <darren.kenny@oracle.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Diffstat (limited to 'hw/mem/sparse-mem.c')
| -rw-r--r-- | hw/mem/sparse-mem.c | 13 |
1 files changed, 12 insertions, 1 deletions
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, } +static void sparse_mem_enter_reset(Object *obj, ResetType type) +{ + SparseMemState *s = SPARSE_MEM(obj); + g_hash_table_remove_all(s->mapped); + return; +} + static const MemoryRegionOps sparse_mem_ops = { .read = sparse_mem_read, .write = sparse_mem_write, @@ -123,7 +130,8 @@ static void sparse_mem_realize(DeviceState *dev, Error **errp) assert(s->baseaddr + s->length > s->baseaddr); - s->mapped = g_hash_table_new(NULL, NULL); + s->mapped = 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, Error **errp) static void sparse_mem_class_init(ObjectClass *klass, void *data) { + ResettableClass *rc = RESETTABLE_CLASS(klass); DeviceClass *dc = DEVICE_CLASS(klass); device_class_set_props(dc, sparse_mem_properties); dc->desc = "Sparse Memory Device"; dc->realize = sparse_mem_realize; + + rc->phases.enter = sparse_mem_enter_reset; } static const TypeInfo sparse_mem_types[] = { |