使用“动态"时 RuntimeBinder 中的泄漏带有 __ComObject 的关键字

问题描述

有谁知道在 C# 中的 __ComObject 实例中使用dynamic"关键字时是否有办法防止 RuntimeBinder 中的内存泄漏?

Does anybody know if there is a way of preventing a memory leak in RuntimeBinder when using "dynamic" keyword with __ComObject instances in C#?

我得到以下代码:

var t = Type.GetTypeFromCLSID(new Guid("BB06C0E4-D293-4f75-8A90-CB05B6477EEE"));
while (true)
{
    dynamic o = System.Activator.CreateInstance(t);
    Marshal.ReleaseComObject(o);
}

这会泄漏 LocalVariableSymbol 类实例(以及来自 Microsoft.CSharp.RuntimeBinder.Semantics 命名空间的其他实例).

This leaks LocalVariableSymbol class instances (and other from the Microsoft.CSharp.RuntimeBinder.Semantics namespace).

用对象"替换动态"，即:

Replacing "dynamic" with "object" i.e.:

    object o = System.Activator.CreateInstance(t);

修复了泄漏，但我更愿意继续使用动态(实际代码要复杂得多，并且使用了动态").

fixes the leak but I'd prefer to keep using dynamic (the actual code is much more complex and makes use of "dynamic").

我知道 RuntimeBinder 单例缓存数据，这会导致泄漏，但您知道是否有任何方法可以清理缓存等吗?

I know the RuntimeBinder singleton caches the data and this causes the leak but do you know if there's any way to cleanup the cache etc.?

非常感谢！

类似问题:

• 内存溢出:数量不断增加Microsoft.CSharp.RuntimeBinder.Semantics
• CLR 类中的内存泄漏

相关链接:

• https://connect.microsoft.com/VisualStudio/feedback/details/1925659(由微软退休)
• https://github.com/dotnet/roslyn/issues/2887

• https://connect.microsoft.com/VisualStudio/feedback/details/1925659 (retired by Microsoft)
• https://github.com/dotnet/roslyn/issues/2887

推荐答案

我的解决方案是替换:

dynamic o = System.Activator.CreateInstance(t);

与:

object o = System.Activator.CreateInstance(t);
dynamic d = o;

应用变通方法后不再发生内存泄漏.

The memory leak no longer occurs having the workaround applied.

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