From: "Dr. David Alan Gilbert" <dgilb...@redhat.com>
We fairly regularly forget VMSTATE_END_OF_LIST markers off descriptions;
given that the current check is only for ->name being NULL, sometimes
we get unlucky and the code apparently works and no one spots the error.
Explicitly add a flag, VMS_END that should be set, and assert it is
set during the traversal.
Note: This can't go in until we update the copy of vmstate.h in slirp.
Suggested-by: Peter Maydell <peter.mayd...@linaro.org>
Signed-off-by: Dr. David Alan Gilbert <dgilb...@redhat.com>
---
include/migration/vmstate.h | 7 ++++++-
migration/vmstate.c | 2 ++
2 files changed, 8 insertions(+), 1 deletion(-)
diff --git a/include/migration/vmstate.h b/include/migration/vmstate.h
index 017c03675c..b50708e57a 100644
--- a/include/migration/vmstate.h
+++ b/include/migration/vmstate.h
@@ -147,6 +147,9 @@ enum VMStateFlags {
* VMStateField.struct_version_id to tell which version of the
* structure we are referencing to use. */
VMS_VSTRUCT = 0x8000,
+
+ /* Marker for end of list */
+ VMS_END = 0x10000
};
typedef enum {
@@ -1163,7 +1166,9 @@ extern const VMStateInfo vmstate_info_qlist;
VMSTATE_UNUSED_BUFFER(_test, 0, _size)
#define VMSTATE_END_OF_LIST() \
- {}
+ { \
+ .flags = VMS_END, \
+ }
int vmstate_load_state(QEMUFile *f, const VMStateDescription *vmsd,
void *opaque, int version_id);
diff --git a/migration/vmstate.c b/migration/vmstate.c
index 05f87cdddc..181ba08c7d 100644
--- a/migration/vmstate.c
+++ b/migration/vmstate.c
@@ -160,6 +160,7 @@ int vmstate_load_state(QEMUFile *f, const
VMStateDescription *vmsd,
}
field++;
}
+ assert(field->flags == VMS_END);
ret = vmstate_subsection_load(f, vmsd, opaque);
if (ret != 0) {
return ret;
@@ -413,6 +414,7 @@ int vmstate_save_state_v(QEMUFile *f, const
VMStateDescription *vmsd,
}
field++;
}
+ assert(field->flags == VMS_END);
if (vmdesc) {
json_writer_end_array(vmdesc);
--
2.34.1
