"Operation could destabilize the runtime"

Uwe Keim

Using the latest ANTS Performance Profiler together with this small console program:

namespace AntsHtmlAgilityPackTests
{
    using HtmlAgilityPack; // Included via NuGet package.

    internal static class Program
    {
        private static void Main()
        {
            new HtmlDocument();
        }
    }
}

An error occurs when running inside ANTS Performance Profiler with highest profiling mode (line-level timings):

System.Security.VerificationException: Operation could destabilize the runtime

The stack trace is:

at HtmlAgilityPack.HtmlDocument..ctor() in D:SVN_CHECKOUThtmlagilitypackTrunkHtmlAgilityPackHtmlDocument.cs:Line 26.
at AntsHtmlAgilityPackTests.Program.Main() in c:UsersukeimTestsMain.cs:Line 12.

When running in a lower profiling mode ("orange", method-level timings), no error occurs.

My question:

How can I work-around this issue?

(I need to have line-level profiler results so switching to a lower mode is not an option)

Uwe Keim

Using ILSpy, I found this to be the constructor of HtmlAgilityPack that crashes:

public HtmlDocument()
{
	this._documentnode = this.CreateNode(HtmlNodeType.Document, 0);
	this.OptionDefaultStreamEncoding = Encoding.Default;
}

I see no special behaviour here.

Would be interesting to see the "instrumented" code of this constructor after it goes through ANTS Profiler.

dom.smith

Hi,

Please try adding HtmlAgilityPack.HtmlDocument to the line-level timings block list. For more information, see: http://documentation.red-gate.com/display/APP9/Profiling+SecurityTransparent+and+partially-trusted+assemblies#ProfilingSecurityTransparentandpartially-trustedassemblies-block-list

Dom.

Uwe Keim

Thanks a lot, that did the trick.

I've added

<assemblyName>HtmlAgilityPack</assemblyName>

to the file

"C:UsersukeimAppDataLocalRed GateANTS Performance Profiler 9LineLevelBlacklist.xml"

and restarted the profiler.

After that, the profiling succeeds without any errors, even in line level mode.