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authorLuiz Capitulino <lcapitulino@redhat.com>2011-10-19 14:51:14 -0200
committerLuiz Capitulino <lcapitulino@redhat.com>2011-10-27 11:48:46 -0200
commit694a099a542563f40116743c963066ce142a7755 (patch)
treedbfa59092dd4abe25963c7b70a038ad67dd811e2 /scripts
parent9f60639b848944200c3d33a89233d808de0b5a43 (diff)
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qapi-commands.py: Don't call the output marshal on error
Today we generate something like this: int qmp_marshal_input_query_foo(...) ... retval = qmp_query_foo(errp); qmp_marshal_output_query_foo(retval, ret, errp); ... However, if qmp_query_foo() fails 'retval' will probably be NULL, which can cause a segfault as not all visitors check if 'retval' is valid. This commit fixes that by changing the code generator to only call the output marshal if qmp_query_foo() succeeds, like this: retval = qmp_query_foo(errp); if (!error_is_set(errp)) { qmp_marshal_output_query_foo(retval, ret, errp); } Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
Diffstat (limited to 'scripts')
-rw-r--r--scripts/qapi-commands.py4
1 files changed, 3 insertions, 1 deletions
diff --git a/scripts/qapi-commands.py b/scripts/qapi-commands.py
index c947ba4..f7def16 100644
--- a/scripts/qapi-commands.py
+++ b/scripts/qapi-commands.py
@@ -62,7 +62,9 @@ def gen_sync_call(name, args, ret_type, indent=0):
name=c_var(name), args=arglist, retval=retval).rstrip()
if ret_type:
ret += "\n" + mcgen(''''
-%(marshal_output_call)s
+if (!error_is_set(errp)) {
+ %(marshal_output_call)s
+}
''',
marshal_output_call=gen_marshal_output_call(name, ret_type)).rstrip()
pop_indent(indent)