在dotnet核心中捕获本机异常 [英] catch native exception in dotnet core

问题描述

在使用pinvoke并在linux上运行的dotnet核心应用程序中，当c ++抛出时-例如-std::runtime_error-我们得到:

in a dotnet core application that uses pinvoke and runs on linux, when c++ throws - for example - std::runtime_error - we get:

terminate called recursively
terminate called after throwing an instance of 'terminate called after throwing an instance of 'std::runtime_error*'
Aborted (core dumped)

即使外部c ++方法的调用被包装在托管代码中的try catch块中.

even though the invocation of the externed c++ method is wrapped in a try catch block in the managed code.

如何在dotnet核心托管代码中捕获并处理此问题?

how can this be caught and treated in the dotnet core managed code?

推荐答案

我设置了此最小，完整且可验证的示例，该示例演示在Linux上托管C#.NET Core代码如何不会捕获任何本机异常.

I set-up this Minimal, Complete and Verifiable example that demonstrates how native exceptions are NOT caught whatsoever by managed C# .NET Core code, on Linux.

如我为dotnet/coreclr 打开的问题所述，尝试在军械库中使用任何可能的武器，但无济于事.

As described in the issue I opened for dotnet/coreclr, I've tried (m)any possible weapon(s) in the arsenal, to no avail.

dotnet团队给出的直接答案是:

The direct answer given by dotnet team was:

我们不支持Unix上的异常处理互操作.没有好的方法可以做到这一点. Mono项目在此处写得很棒: http ://www.mono-project.com/docs/advanced/pinvoke/#runtime-exception-propagation .相同的推理也适用于.NET Core.

We do not support exception handling interop on Unix. There is no good way to do it. The Mono project has a great write up on it here: http://www.mono-project.com/docs/advanced/pinvoke/#runtime-exception-propagation . The same reasoning applies to .NET Core.

.net网络团队还推荐的Mono项目解决方案是:

The Mono project's solution, which is also recommended by the dotnet team, is:

C ++异常将需要映射到"out"参数或返回值中，以便托管代码可以知道发生了什么错误，并(可选)抛出托管异常以传播"原始C ++异常.

C++ exceptions will need to be mapped into an "out" parameter or a return value, so that managed code can know what error occurred, and (optionally) throw a managed exception to "propagate" the original C++ exception.

这就是我们加强的实现，而且，它很有效:).

That's what we eneded up implementing and, well, it works :).

这篇关于在dotnet核心中捕获本机异常的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！