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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>
This commit is contained in:
Paolo Bonzini 2012-03-22 12:51:07 +01:00 committed by Luiz Capitulino
parent b6f0474fc0
commit 69b50071d8
1 changed files with 7 additions and 0 deletions
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7
scripts/qapi-visit.py
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@ -65,6 +65,9 @@ void visit_type_%(name)s(Visitor *m, %(name)s ** obj, const char *name, Error **
return; return;
} }
visit_start_struct(m, (void **)obj, "%(name)s", name, sizeof(%(name)s), errp); visit_start_struct(m, (void **)obj, "%(name)s", name, sizeof(%(name)s), errp);
if (obj && !*obj) {
goto end;
}
''', ''',
name=name) name=name)
push_indent() push_indent()
@ -72,6 +75,7 @@ void visit_type_%(name)s(Visitor *m, %(name)s ** obj, const char *name, Error **
pop_indent() pop_indent()
ret += mcgen(''' ret += mcgen('''
end:
visit_end_struct(m, errp); visit_end_struct(m, errp);
} }
''') ''')
@ -122,6 +126,9 @@ void visit_type_%(name)s(Visitor *m, %(name)s ** obj, const char *name, Error **
return; return;
} }
visit_start_struct(m, (void **)obj, "%(name)s", name, sizeof(%(name)s), &err); visit_start_struct(m, (void **)obj, "%(name)s", name, sizeof(%(name)s), &err);
if (obj && !*obj) {
goto end;
}
visit_type_%(name)sKind(m, &(*obj)->kind, "type", &err); visit_type_%(name)sKind(m, &(*obj)->kind, "type", &err);
if (err) { if (err) {
error_propagate(errp, err); error_propagate(errp, err);