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Avoid losing references to objects in the native-scripting boundary

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This commit is contained in:
Pedro J. Estébanez 2023-02-03 11:42:51 +01:00
parent 1ed549e64b
commit 0bcc7bb5c7
3 changed files with 40 additions and 1 deletions
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29
core/object/class_db.h
View file

@ -40,6 +40,8 @@
#include "core/object/callable_method_pointer.h"
#include "core/templates/hash_set.h"
#include <type_traits>
#define DEFVAL(m_defval) (m_defval)
#ifdef DEBUG_METHODS_ENABLED
@ -241,6 +243,24 @@ public:
static uint64_t get_api_hash(APIType p_api);
template <typename>
struct member_function_traits;
template <typename R, typename T, typename... Args>
struct member_function_traits<R (T::*)(Args...)> {
using return_type = R;
};
template <typename R, typename T, typename... Args>
struct member_function_traits<R (T::*)(Args...) const> {
using return_type = R;
};
template <typename R, typename... Args>
struct member_function_traits<R (*)(Args...)> {
using return_type = R;
};
template <class N, class M, typename... VarArgs>
static MethodBind *bind_method(N p_method_name, M p_method, VarArgs... p_args) {
Variant args[sizeof...(p_args) + 1] = { p_args..., Variant() }; // +1 makes sure zero sized arrays are also supported.
@ -249,6 +269,9 @@ public:
argptrs[i] = &args[i];
}
MethodBind *bind = create_method_bind(p_method);
if constexpr (std::is_same<typename member_function_traits<M>::return_type, Object *>::value) {
bind->set_return_type_is_raw_object_ptr(true);
}
return bind_methodfi(METHOD_FLAGS_DEFAULT, bind, p_method_name, sizeof...(p_args) == 0 ? nullptr : (const Variant **)argptrs, sizeof...(p_args));
}
@ -261,6 +284,9 @@ public:
}
MethodBind *bind = create_static_method_bind(p_method);
bind->set_instance_class(p_class);
if constexpr (std::is_same<typename member_function_traits<M>::return_type, Object *>::value) {
bind->set_return_type_is_raw_object_ptr(true);
}
return bind_methodfi(METHOD_FLAGS_DEFAULT, bind, p_method_name, sizeof...(p_args) == 0 ? nullptr : (const Variant **)argptrs, sizeof...(p_args));
}
@ -273,6 +299,9 @@ public:
bind->set_name(p_name);
bind->set_default_arguments(p_default_args);
if constexpr (std::is_same<typename member_function_traits<M>::return_type, Object *>::value) {
bind->set_return_type_is_raw_object_ptr(true);
}
String instance_type = bind->get_instance_class();

4
core/object/method_bind.h
View file

@ -49,6 +49,7 @@ class MethodBind {
bool _static = false;
bool _const = false;
bool _returns = false;
bool _returns_raw_obj_ptr = false;
protected:
Variant::Type *argument_types = nullptr;
@ -121,6 +122,9 @@ public:
_FORCE_INLINE_ bool has_return() const { return _returns; }
virtual bool is_vararg() const { return false; }
_FORCE_INLINE_ bool is_return_type_raw_object_ptr() { return _returns_raw_obj_ptr; }
_FORCE_INLINE_ void set_return_type_is_raw_object_ptr(bool p_returns_raw_obj) { _returns_raw_obj_ptr = p_returns_raw_obj; }
void set_default_arguments(const Vector<Variant> &p_defargs);
uint32_t get_hash() const;

8
modules/gdscript/gdscript_vm.cpp
View file

@ -1969,7 +1969,13 @@ Variant GDScriptFunction::call(GDScriptInstance *p_instance, const Variant **p_a
VariantInternal::initialize(ret, Variant::OBJECT);
Object **ret_opaque = VariantInternal::get_object(ret);
method->ptrcall(base_obj, argptrs, ret_opaque);
VariantInternal::update_object_id(ret);
if (method->is_return_type_raw_object_ptr()) {
// The Variant has to participate in the ref count since the method returns a raw Object *.
VariantInternal::object_assign(ret, *ret_opaque);
} else {
// The method, in case it returns something, returns an already encapsulated object.
VariantInternal::update_object_id(ret);
}
#ifdef DEBUG_ENABLED
if (GDScriptLanguage::get_singleton()->profiling) {