migration: dump vmstate info as a json file for static analysis
This commit adds a new command, '-dump-vmstate', that takes a filename
as an argument. When executed, QEMU will dump the vmstate information
for the machine type it's invoked with to the file, and quit.
The JSON-format output can then be used to compare the vmstate info for
different QEMU versions, specifically to test whether live migration
would break due to changes in the vmstate data.
A Python script that compares the output of such JSON dumps is included
in the following commit.
Signed-off-by: Amit Shah <amit.shah@redhat.com>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>
diff --git a/include/migration/vmstate.h b/include/migration/vmstate.h
index 799d2d0..71a8a95 100644
--- a/include/migration/vmstate.h
+++ b/include/migration/vmstate.h
@@ -788,4 +788,6 @@
return 50 + (SELF_ANNOUNCE_ROUNDS - round - 1) * 100;
}
+void dump_vmstate_json_to_file(FILE *out_fp);
+
#endif
