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| author | Luiz Capitulino <lcapitulino@redhat.com> | 2011-10-19 14:51:14 -0200 |
|---|---|---|
| committer | Luiz Capitulino <lcapitulino@redhat.com> | 2011-10-27 11:48:46 -0200 |
| commit | 694a099a542563f40116743c963066ce142a7755 (patch) | |
| tree | dbfa59092dd4abe25963c7b70a038ad67dd811e2 /scripts/qapi-commands.py | |
| parent | 9f60639b848944200c3d33a89233d808de0b5a43 (diff) | |
| download | qemu-694a099a542563f40116743c963066ce142a7755.zip qemu-694a099a542563f40116743c963066ce142a7755.tar.gz qemu-694a099a542563f40116743c963066ce142a7755.tar.bz2 | |
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/qapi-commands.py')
| -rw-r--r-- | scripts/qapi-commands.py | 4 |
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) |