[PULL] qapi-types.py: Fix enum struct sizes on i686

Message ID 1378822364-13887-2-git-send-email-lcapitulino@redhat.com
State New
Headers show

Commit Message

Luiz Capitulino Sept. 10, 2013, 2:12 p.m.
From: Cole Robinson <crobinso@redhat.com>

Unlike other list types, enum wasn't adding any padding, which caused
a mismatch between the generated struct size and GenericList struct
size. More details in a678e26cbe89f7a27cbce794c2c2784571ee9d21

This crashed qemu if calling qmp query-tpm-types for example, which
upsets libvirt capabilities probing. Reproducer on i686:

(sleep 5; printf '{"execute":"qmp_capabilities"}\n{"execute":"query-tpm-types"}\n') | ./i386-softmmu/qemu-system-i386 -S -nodefaults -nographic -M none -qmp stdio


Cc: qemu-stable@nongnu.org
Signed-off-by: Cole Robinson <crobinso@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Tested-by: Richard W.M. Jones <rjones@redhat.com>
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
 scripts/qapi-types.py | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)


diff --git a/scripts/qapi-types.py b/scripts/qapi-types.py
index 86de980..5222463 100644
--- a/scripts/qapi-types.py
+++ b/scripts/qapi-types.py
@@ -51,7 +51,10 @@  def generate_fwd_enum_struct(name, members):
     return mcgen('''
 typedef struct %(name)sList
-    %(name)s value;
+    union {
+        %(name)s value;
+        uint64_t padding;
+    };
     struct %(name)sList *next;
 } %(name)sList;