我需要编写一个测试来验证我的代码是否可以处理 AccessViolationException(或任何其他 WIN32 损坏状态异常 - CSE),该异常在不安全的上下文中发生,通常通过调用第 3 方库来处理。
这一切都应该在 .net 4.0 上使用 C# 来完成。
我找到了这个相关问题如何处理AccessViolationException https://stackoverflow.com/questions/3469368/how-to-handle-accessviolationexception以及这篇相关文章http://dotnetslackers.com/articles/net/All-about-Corrupted-State-Exceptions-in-NET4.aspx http://dotnetslackers.com/articles/net/All-about-Corrupted-State-Exceptions-in-NET4.aspx,其中解释了如何捕获这些 CSE 及其背景。
所以我想在测试中激发 WIN32 CSE,以确保我的应用程序中的正确处理。就像是:
一些要测试的示例类:
public class MyExceptionHandler
{
[HandleProcessCorruptedStateExceptions]
public void HandleCorruptedStateException()
{
try
{
//Force genuine unsafe AccessViolationException
//not just a throw new AccessViolationException
}
catch(Exception e)
{
//Log/cleanup/other
}
}
public void DoesNotHandleCorruptedStateException()
{
try
{
//Force genuine unsafe AccessViolationException
//not just a throw new AccessViolationException
}
catch (Exception e)
{
//Log/cleanup/other
}
}
}
A Test:
class MyTest
{
[Test]
public void ShouldVerifyThatAnAccessViolationExceptionIsHandledCorrectly()
{
var handler = new MyExceptionHandler();
Assert.DoesNotThrow(() => handler.HandleCorruptedStateException());
}
[Test]
public void ShouldVerifyThatAnAccessViolationExceptionIsNotHandledCorrectly()
{
var handler = new MyExceptionHandler();
Assert.Throws<AccessViolationException>(() => handler.DoesNotHandleCorruptedStateException());
}
}
有没有人建议如何在不做太多工作的情况下实现这一目标(例如编写一个导致此异常的不安全库)。
亲切的问候
UPDATED:为了匹配我的最终解决方案,感谢 JaredPar。
public class MyExceptionHandler
{
[HandleProcessCorruptedStateExceptions]
public void HandleCorruptedStateException()
{
try
{
var ptr = new IntPtr(42);
Marshal.StructureToPtr(42, ptr, true);
}
catch(Exception e)
{
//Log/cleanup/other
}
}
public void DoesNotHandleCorruptedStateException()
{
try
{
var ptr = new IntPtr(42);
Marshal.StructureToPtr(42, ptr, true);
}
catch (Exception e)
{
//Log/cleanup/other
}
}
}
TIP:要手动验证这一点,请使用简单的控制台应用程序,从命令行:
class Program
{
static void Main(string[] args)
{
var handler = new MyExceptionHandler();
if (args.Length > 1)
{
handler.HandleCorruptedStateException();
}
else
{
handler.DoesNotHandleCorruptedStateException();
}
}
}