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Complain if casting a freed object in a debug session 

The idea is to give the user a chance to realize a mistake that will cause a crash in a release build (or with no debugger attached).
This commit is contained in:
Pedro J. Estébanez 2021-07-31 11:54:41 +02:00
parent 504f47eaec
commit 123d3ef935
3 changed files with 33 additions and 0 deletions
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19
core/variant.cpp
View File

@ -803,6 +803,25 @@ bool Variant::is_one() const {
return false;
}
ObjectID Variant::get_object_instance_id() const {
if (type != OBJECT) {
return 0;
}
#ifdef DEBUG_ENABLED
if (is_ref()) {
return !_get_obj().ref.is_null() ? _REF_OBJ_PTR(*this)->get_instance_id() : 0;
} else {
return _get_obj().rc->instance_id;
}
#else
if (is_ref() && _get_obj().ref.is_null()) {
return 0;
} else {
return _get_obj().obj->get_instance_id();
}
#endif
}
void Variant::reference(const Variant &p_variant) {
switch (type) {
case NIL:

2
core/variant.h
View File

@ -187,6 +187,8 @@ public:
bool is_zero() const;
bool is_one() const;
ObjectID get_object_instance_id() const;
operator bool() const;
operator signed int() const;
operator unsigned int() const; // this is the real one

12
modules/gdscript/gdscript_function.cpp
View File

@ -846,6 +846,10 @@ Variant GDScriptFunction::call(GDScriptInstance *p_instance, const Variant **p_a
*dst = Variant::construct(to_type, (const Variant **)&src, 1, err);
#ifdef DEBUG_ENABLED
if (src->get_type() == Variant::OBJECT && !src->is_ref() && ObjectDB::get_instance(src->get_object_instance_id()) == nullptr) {
err_text = "Trying to cast a deleted object.";
OPCODE_BREAK;
}
if (err.error != Variant::CallError::CALL_OK) {
err_text = "Invalid cast: could not convert value to '" + Variant::get_type_name(to_type) + "'.";
OPCODE_BREAK;
@ -866,6 +870,10 @@ Variant GDScriptFunction::call(GDScriptInstance *p_instance, const Variant **p_a
GD_ERR_BREAK(!nc);
#ifdef DEBUG_ENABLED
if (src->get_type() == Variant::OBJECT && !src->is_ref() && ObjectDB::get_instance(src->get_object_instance_id()) == nullptr) {
err_text = "Trying to cast a deleted object.";
OPCODE_BREAK;
}
if (src->get_type() != Variant::OBJECT && src->get_type() != Variant::NIL) {
err_text = "Invalid cast: can't convert a non-object value to an object type.";
OPCODE_BREAK;
@ -894,6 +902,10 @@ Variant GDScriptFunction::call(GDScriptInstance *p_instance, const Variant **p_a
GD_ERR_BREAK(!base_type);
#ifdef DEBUG_ENABLED
if (src->get_type() == Variant::OBJECT && !src->is_ref() && ObjectDB::get_instance(src->get_object_instance_id()) == nullptr) {
err_text = "Trying to cast a deleted object.";
OPCODE_BREAK;
}
if (src->get_type() != Variant::OBJECT && src->get_type() != Variant::NIL) {
err_text = "Trying to assign a non-object value to a variable of type '" + base_type->get_path().get_file() + "'.";
OPCODE_BREAK;