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qapi: allow freeing partially-allocated objects
Objects going through the dealloc visitor can be only partially allocated. Detect the situation and avoid a segfault. This also helps with the input visitor, when there are errors. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Reviewed-by: Anthony Liguori <aliguori@us.ibm.com> Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
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@ -65,6 +65,9 @@ def generate_visit_struct(name, members):
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return;
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}
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visit_start_struct(m, (void **)obj, "%(name)s", name, sizeof(%(name)s), errp);
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if (obj && !*obj) {
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goto end;
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}
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''',
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name=name)
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push_indent()
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@ -72,6 +75,7 @@ def generate_visit_struct(name, members):
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pop_indent()
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ret += mcgen('''
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end:
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visit_end_struct(m, errp);
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}
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''')
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@ -122,6 +126,9 @@ def generate_visit_union(name, members):
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return;
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}
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visit_start_struct(m, (void **)obj, "%(name)s", name, sizeof(%(name)s), &err);
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if (obj && !*obj) {
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goto end;
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}
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visit_type_%(name)sKind(m, &(*obj)->kind, "type", &err);
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if (err) {
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error_propagate(errp, err);
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