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[Qemu-devel] [PULL 2/8] memory: Sanity check that no listeners remain on
From: |
Alex Williamson |
Subject: |
[Qemu-devel] [PULL 2/8] memory: Sanity check that no listeners remain on a destroyed AddressSpace |
Date: |
Mon, 02 Jun 2014 16:00:27 -0600 |
User-agent: |
StGit/0.17-dirty |
From: David Gibson <address@hidden>
At the moment, most AddressSpace objects last as long as the guest system
in practice, but that could well change in future. In addition, for VFIO
we will be introducing some private per-AdressSpace information, which must
be disposed of before the AddressSpace itself is destroyed.
To reduce the chances of subtle bugs in this area, this patch adds
asssertions to ensure that when an AddressSpace is destroyed, there are no
remaining MemoryListeners using that AS as a filter.
Signed-off-by: David Gibson <address@hidden>
Signed-off-by: Alexey Kardashevskiy <address@hidden>
Reviewed-by: Paolo Bonzini <address@hidden>
Signed-off-by: Alex Williamson <address@hidden>
---
memory.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/memory.c b/memory.c
index 3f1df23..678661e 100644
--- a/memory.c
+++ b/memory.c
@@ -1722,12 +1722,19 @@ void address_space_init(AddressSpace *as, MemoryRegion
*root, const char *name)
void address_space_destroy(AddressSpace *as)
{
+ MemoryListener *listener;
+
/* Flush out anything from MemoryListeners listening in on this */
memory_region_transaction_begin();
as->root = NULL;
memory_region_transaction_commit();
QTAILQ_REMOVE(&address_spaces, as, address_spaces_link);
address_space_destroy_dispatch(as);
+
+ QTAILQ_FOREACH(listener, &memory_listeners, link) {
+ assert(listener->address_space_filter != as);
+ }
+
flatview_unref(as->current_map);
g_free(as->name);
g_free(as->ioeventfds);
- [Qemu-devel] [PULL 0/8] Series short description, Alex Williamson, 2014/06/02
- [Qemu-devel] [PULL 2/8] memory: Sanity check that no listeners remain on a destroyed AddressSpace,
Alex Williamson <=
- [Qemu-devel] [PULL 1/8] vfio-pci: Quirk RTL8168 NIC, Alex Williamson, 2014/06/02
- [Qemu-devel] [PULL 3/8] int128: Add int128_exts64(), Alex Williamson, 2014/06/02
- [Qemu-devel] [PULL 4/8] vfio: Fix 128 bit handling, Alex Williamson, 2014/06/02
- [Qemu-devel] [PULL 5/8] vfio: Rework to have error paths, Alex Williamson, 2014/06/02
- [Qemu-devel] [PULL 6/8] vfio: Introduce VFIO address spaces, Alex Williamson, 2014/06/02
- [Qemu-devel] [PULL 7/8] vfio: Create VFIOAddressSpace objects as needed, Alex Williamson, 2014/06/02
- [Qemu-devel] [PULL 8/8] vfio: Add guest side IOMMU support, Alex Williamson, 2014/06/02
- Re: [Qemu-devel] [PULL 0/8] Series short description, Alex Williamson, 2014/06/02
- Re: [Qemu-devel] [PULL 0/8] Series short description, Peter Maydell, 2014/06/03