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| author | Eric Blake <eblake@redhat.com> | 2016-04-28 15:45:15 -0600 |
|---|---|---|
| committer | Markus Armbruster <armbru@redhat.com> | 2016-05-12 09:47:54 +0200 |
| commit | e5826a2fd727f0be54a81083f31fe02a275465cd (patch) | |
| tree | 97132b9ee75efe7e9945f3a89262bdd39fe9e96e /qapi | |
| parent | 240f64b6dc3346d044d7beb7cc3a53668ce47384 (diff) | |
| download | qemu-e5826a2fd727f0be54a81083f31fe02a275465cd.tar.gz | |
qmp-input: Don't consume input when checking has_member
Commit e8316d7 mistakenly passed consume=true within
qmp_input_optional() when checking if an optional member was
present, but the mistake was silently ignored since the code
happily let us extract a member more than once. Fix
qmp_input_optional() to not consume anything, then tighten up
the input visitor to ensure that a member is consumed exactly
once (all generated code follows this pattern; and the new
assert will catch any hand-written code that tries to visit
the same key more than once).
Signed-off-by: Eric Blake <eblake@redhat.com>
Message-Id: <1461879932-9020-8-git-send-email-eblake@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Diffstat (limited to 'qapi')
| -rw-r--r-- | qapi/qmp-input-visitor.c | 11 |
1 files changed, 7 insertions, 4 deletions
diff --git a/qapi/qmp-input-visitor.c b/qapi/qmp-input-visitor.c index c3c3271b1b..cae638768e 100644 --- a/qapi/qmp-input-visitor.c +++ b/qapi/qmp-input-visitor.c @@ -56,16 +56,19 @@ static QObject *qmp_input_get_object(QmpInputVisitor *qiv, { StackObject *tos = &qiv->stack[qiv->nb_stack - 1]; QObject *qobj = tos->obj; + QObject *ret; assert(qobj); /* If we have a name, and we're in a dictionary, then return that * value. */ if (name && qobject_type(qobj) == QTYPE_QDICT) { - if (tos->h && consume) { - g_hash_table_remove(tos->h, name); + ret = qdict_get(qobject_to_qdict(qobj), name); + if (tos->h && consume && ret) { + bool removed = g_hash_table_remove(tos->h, name); + assert(removed); } - return qdict_get(qobject_to_qdict(qobj), name); + return ret; } /* If we are in the middle of a list, then return the next element @@ -335,7 +338,7 @@ static void qmp_input_type_any(Visitor *v, const char *name, QObject **obj, static void qmp_input_optional(Visitor *v, const char *name, bool *present) { QmpInputVisitor *qiv = to_qiv(v); - QObject *qobj = qmp_input_get_object(qiv, name, true); + QObject *qobj = qmp_input_get_object(qiv, name, false); if (!qobj) { *present = false; |