C++ 调用DLL函数时内存读取错误

我有两个项目：app.exe和engine.dll（在Visual Studio 2017中隐式链接lib）。当我试图从engine.dll调用app.exe中的此基本代码时，我得到内存读取错误（访问冲突）。下面是一个简短的例子：

// In DLL .h
class Engine // pure virtual class
{
public:
    Engine() { }

/* pure virtual functions here ...*/

    static Engine* Create(DefaultAllocator& Allocator);
};

// In DLL CPP
Engine* Engine::Create(DefaultAllocator& Allocator)
{
    EngineImpl* impl = NEW_OBJ(Allocator, EngineImpl)(Allocator); // NEW_OBJ is a simple place holder
    // changing to 'new' didn't help too

    return impl;
}

void Engine::InitSomething()
{
// ERROR: Allocating anything here will be corrupted 
}

// In another DLL CPP
struct NewPlaceholder {};
#define NEW_OBJ(allocator, ...) new (NewPlaceholder(), (allocator).allocate(sizeof(__VA_ARGS__))) __VA_ARGS__

// Main.cpp from EXE
int main(int32 Argc, char* Argv[])
{
    static DefaultAllocator Allocator; // Has Allocate/Deallocate methods (malloc/free)

    Engine* engine = Engine::Create(Allocator); 
// And now as I call any function from Engine I get corrupted results
    engine->InitSomething();
}

---

这两个项目使用完全相同的设置创建/MDd。App.exe在引用中包含引擎。

在调试器中单步执行，并查看堆栈/监视窗口中的所有指针。它显示正确的调用堆栈跟踪，但到达Engine.dll代码时，值已损坏