Convert Object::cast_to() to the static version

Currently we rely on some undefined behavior when Object->cast_to() gets
called with a Null pointer. This used to work fine with GCC < 6 but
newer versions of GCC remove all codepaths in which the this pointer is
Null. However, the non-static cast_to() was supposed to be null safe.

This patch makes cast_to() Null safe and removes the now redundant Null
checks where they existed.

It is explained in this article: https://www.viva64.com/en/b/0226/
This commit is contained in:
Hein-Pieter van Braam 2017-08-24 22:58:51 +02:00
parent 4aa2c18cb4
commit cacced7e50
185 changed files with 1314 additions and 1508 deletions

View file

@ -112,7 +112,7 @@ bool JavaClass::_call_method(JavaObject *p_instance, const StringName &p_method,
Ref<Reference> ref = *p_args[i];
if (!ref.is_null()) {
if (ref->cast_to<JavaObject>()) {
if (Object::cast_to<JavaObject>(ref)) {
Ref<JavaObject> jo = ref;
//could be faster