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c#visual-studiodebuggingdllplugins
Sigurd V
Sigurd V

Reputation: 5107

Debugging of DLL plugin does not work

I'm creating a DLL file in Visual Studio 2012 which is used as a class library plugin in a proprietary program.

The program loads the plugin DLL on startup and I can access it in a visual studio like fashion in the proprietary program.

But if a method in the plugin for some reason fails, I don't always get a stack trace and I can't single step through my source files.

I have placed my PDB files in the same directory but I believe the error handling of the environment takes over so I get an error that indicates where the proprietary program failed and not where my plugin failed.

I cannot create a test stub as the DLLs are dependent on instances created in the proprietary program.

How can I, in an efficient way, debug my DLL without having to put a message/log statement on every other line?

Upvotes: 2

Views: 1173

Answers (2)

Scott Chamberlain
Scott Chamberlain

Reputation: 127543

Actually yea, it is really easy! All you need to do is add a event for AppDomain.FirstChanceException. Any execption that is thrown, even if they are in a try-catch block, will get passed off to this event.

public class MyPlugin : IPlugin
{
    static MyPlugin()
    {
        AppDomain.CurrentDomain.FirstChanceException += FirstChanceHandler;
    }

    static void FirstChanceHandler(object source, FirstChanceExceptionEventArgs e)
    {
        MyErrorLogger.WriteLine("FirstChanceException event raised in {0}: {1}",
            AppDomain.CurrentDomain.FriendlyName, e.Exception.Message);
    }
}

Upvotes: 2

Mark Redman
Mark Redman

Reputation: 24515

Try placing the related .pdb file next to the .dll, that should make that information available.

Upvotes: 1

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