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Bug: 蓝图重编译后刷新缓存的废弃 UFunction #2358

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Bug: 蓝图重编译后刷新缓存的废弃 UFunction #2358

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efe8301
Bug: 蓝图重编译后刷新缓存的废弃 UFunction
Monocluar Aug 13, 2026
212c3a8
Update FunctionTranslator.cpp
Monocluar Aug 13, 2026
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55 changes: 43 additions & 12 deletions unreal/Puerts/Source/JsEnv/Private/FunctionTranslator.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -87,6 +87,7 @@ static GlobalBufferAutoRelease Dummy;
#endif

FFunctionTranslator::FFunctionTranslator(UFunction* InFunction, bool IsDelegate)
: ArgumentDefaultValues(nullptr) // 初始化默认参数缓存指针,确保函数刷新时可以安全清理旧缓存
{
Init(InFunction, IsDelegate);
}
Expand Down Expand Up @@ -115,6 +116,7 @@ void FFunctionTranslator::Init(UFunction* InFunction, bool IsDelegate)
IsStatic = InFunction->HasAnyFunctionFlags(FUNC_Static);
}
Arguments.clear();
Return.reset(); // 函数签名可能在重编译后改变，避免继续持有旧返回值属性转换器

SkipWorldContextInArg0 = false;
for (TFieldIterator<PropertyMacro> It(InFunction); It && (It->PropertyFlags & CPF_Parm); ++It)
Expand All @@ -136,6 +138,10 @@ void FFunctionTranslator::Init(UFunction* InFunction, bool IsDelegate)
}
}

if (ArgumentDefaultValues) // 蓝图重编译后会复用函数转换器, 重新初始化前需要释放旧函数的默认参数缓存
{
FMemory::Free(ArgumentDefaultValues);
}
ArgumentDefaultValues = nullptr;

if (!IsDelegate)
Expand Down Expand Up @@ -253,23 +259,48 @@ void FFunctionTranslator::Call(
FV8Utils::ThrowException(Isolate, "access a invalid object");
return;
}
TWeakObjectPtr<UFunction> CallFunction =
!IsInterfaceFunction ? Function : (CallObject->GetClass()->FindFunctionByName(Function->GetFName()));
TWeakObjectPtr<UFunction> CallFunction = Function;
if (IsInterfaceFunction && Function.IsValid())
{
CallFunction = CallObject->GetClass()->FindFunctionByName(Function->GetFName());
}

UFunction* CallFunctionPtr = CallFunction.Get();

#if WITH_EDITOR
// Blueprint 重编译后，旧 Class 会被标记为 CLASS_NewerVersionExists。
// 使用 ClassFlags 判断可以避免每次调用都检查 TRASHCLASS_、REINST_ 等名称前缀。
UClass* OwnerClass = CallFunctionPtr ? CallFunctionPtr->GetOuterUClass() : nullptr;
if (!OwnerClass || OwnerClass->HasAnyClassFlags(CLASS_NewerVersionExists))
{
UFunction* RefreshedFunction = CallObject->GetClass()->FindFunctionByName(FunctionName);
UClass* RefreshedOwnerClass = ::IsValid(RefreshedFunction) ? RefreshedFunction->GetOuterUClass() : nullptr;

if (!RefreshedOwnerClass || RefreshedOwnerClass->HasAnyClassFlags(CLASS_NewerVersionExists))
{
FV8Utils::ThrowException(Isolate, "failed to refresh function after class recompilation");
return;
}

Init(RefreshedFunction, false);
CallFunctionPtr = RefreshedFunction;
}
#endif

if (!CallFunctionPtr)
{
FV8Utils::ThrowException(Isolate, "access an invalid function");
return;
}

// 参数缓冲区必须在函数刷新之后分配，确保使用新的 ParamsBufferSize。
#if defined(USE_GLOBAL_PARAMS_BUFFER)
void* Params = Buffer;
#else
void* Params = ParamsBufferSize > 0 ? FMemory_Alloca(ParamsBufferSize) : nullptr;
#endif
#if WITH_EDITOR
if (!CallFunction.IsValid())
{
CallFunction = CallObject->GetClass()->FindFunctionByName(FunctionName);
Init(CallFunction.Get(), false);
}
#endif

auto CallFunctionPtr = CallFunction.Get();
if ((Function->FunctionFlags & FUNC_Native) && !(Function->FunctionFlags & FUNC_Net) &&

if ((CallFunctionPtr->FunctionFlags & FUNC_Native) && !(CallFunctionPtr->FunctionFlags & FUNC_Net) &&
!CallFunctionPtr->HasAnyFunctionFlags(FUNC_UbergraphFunction))
{
FastCall(Isolate, Context, Info, CallObject, CallFunctionPtr, Params);
Expand Down