打印当前autoreleasepool对象结构

举例：

// 引入打印函数
extern void _objc_autoreleasePoolPrint(void);

int main(int argc, char * argv[]) {
    NSString * appDelegateClassName;
    @autoreleasepool {
        // Setup code that might create autoreleased objects goes here.
        appDelegateClassName = NSStringFromClass([AppDelegate class]);
        
        // 进行打印
        _objc_autoreleasePoolPrint();
    }

    return UIApplicationMain(argc, argv, nil, appDelegateClassName);
}