捕获Segfault或C ++中的任何其他错误/异常/信号，如在Java中捕获异常 [英] Catch Segfault or any other errors/exceptions/signals in C++ like catching exceptions in Java

问题描述

我写了一个基于错误的开源库的Linux程序。这个库有时会触发我无法控制的segfaults。当然，一旦图书馆出现故障，整个节目就会死亡。但是，我必须确保我的程序保持运行，即使库有segefaults。这是因为我的程序类作为一个服务器，它需要至少告诉客户一些坏事发生，并从错误中恢复，而不是鸡出来...有什么办法吗？

我在Java中了解到，只需要捕获一个异常。但C ++如何处理？

[更新]我明白C ++中也有异常处理，但Segfault不是例外，是吗？当segfault发生时，我不认为任何东西被抛出。你必须明确地扔一些东西来使用try .... catch ....据我所知。非常感谢，我对C ++来说非常新鲜。

解决方案

你不能可靠地在分段违例后继续执行。如果您的程序必须保持运行，请在单独的进程中关闭违规库，并通过管道与其进行通信。当您执行细分违规时，您的程序会注意到封闭的管道。

I wrote a Linux program based on a buggy open source library. This library sometimes triggers segfaults that I cannot control. And of course once the library has segfaults, the entire program dies. However, I have to make sure my program keeps running even if the library has segfaults. This is because my program sort of serves as a "server" and it needs to at least tell the clients something bad happened and recover from the errors, rather than chicken out... Is there any way to do that?

I understand in Java one just needs to catch an exception. But how does C++ handle this?

[UPDATE]I understand there is also exception handling in C++, but Segfault is not an exception, is it? I don't think anything is thrown when segfault happens. You have to explicitly "throw" something to use try.... catch.... as far as I know.

Thanks so much, I am quite new to C++.

解决方案

You cannot reliably resume execution after a segmentation violation. If your program must remain running, fence off the offending library in a separate process and communicate with it over a pipe. When it takes a segmentation violation, your program will notice the closed pipe.

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