[Mono-bugs] [Bug 418469] New: Dynamic assembly load causes mono to stop responding

[bugzilla_noreply at novell.com]

https://bugzilla.novell.com/show_bug.cgi?id=418469


           Summary: Dynamic assembly load causes mono to stop responding
           Product: Mono: Class Libraries
           Version: 2.0
          Platform: x86
        OS/Version: Windows Vista
            Status: NEW
          Severity: Normal
          Priority: P5 - None
         Component: CORLIB
        AssignedTo: mono-bugs at lists.ximian.com
        ReportedBy: kobruleht2 at hot.ee
         QAContact: mono-bugs at lists.ximian.com
          Found By: ---


To reproduce:

1. Create assembly entityextension.dll containing code:

public class Extension { }

2. Create second assembly containing code:

using System;
using System.CodeDom.Compiler;
using System.Reflection;

public class Business
{
    public class Test : Extension { }
}

public static class EntityManager
{

    public static void Configure()
    {
    }

    public static Business.Test Reference()
    {
        return new Business.Test();
    }

    static EntityManager()
    {
        AppDomain.CurrentDomain.AssemblyResolve +=
CurrentDomain_AssemblyResolve;
    }


    static Assembly CurrentDomain_AssemblyResolve(object sender,
ResolveEventArgs args)
    {
        if (args.Name.StartsWith("entityextension"))
        {
            Microsoft.CSharp.CSharpCodeProvider provider = new
Microsoft.CSharp.CSharpCodeProvider();

            CompilerParameters compilerParameters = new CompilerParameters
            {
                GenerateInMemory = true
            };

            CompilerResults compilerResults =
                 provider.CompileAssemblyFromSource(compilerParameters, "public
class Extension { }");
            if (compilerResults.Errors.HasErrors)
                throw new ApplicationException("Unexpected compile error");

            return compilerResults.CompiledAssembly;
        }
        return null;
    }
}

3. Create main assembly containing code:

using System;
using System.CodeDom.Compiler;
using System.IO;
using System.Reflection;
using System.Collections.Generic;

class Program
{
    static void Main()
    {
        File.Delete("entityextension.dll");
        EntityManager.Configure();
        ParseAppDomain();
    }

    static void ParseAppDomain()
    {
        var interfaceImplementations = new Dictionary<Type, IList<Type>>();
        var assemblies = AppDomain.CurrentDomain.GetAssemblies();
        foreach (var assembly in assemblies)
        {
            Parse(assembly, interfaceImplementations);
        }
    }

    static void Parse(Assembly assembly, IDictionary<Type, IList<Type>>
interfaceImplementations)
    {
        try
        {
            var assemblyTypes = assembly.GetTypes();
            foreach (Type type in assemblyTypes)
            {
                if (type.IsAbstract)
                    continue;
                foreach (Type i in type.GetInterfaces())
                {
                    if (i.Assembly.GetCustomAttributes(typeof(DbLinqAttribute),
false).Length > 0)
                    {
                        IList<Type> types;
                        if (!interfaceImplementations.TryGetValue(i, out
types))
                            interfaceImplementations[i] = types = new
List<Type>();
                        types.Add(type);
                    }
                }
            }
        }
        catch (ReflectionTypeLoadException) { }
    }
}

[AttributeUsage(AttributeTargets.Assembly)]
public class DbLinqAttribute : System.Attribute
{
}

4. Create application using VSCE2008 SP1. Run application in Vista.

Observed:

4.1 Application stops responding. Only killing mono process in task manager
stops it.

4.2 In other testcase unhandled exception occurs:

  at (wrapper managed-to-native) System.Reflection.Assembly.GetTypes (bool)
<0x00004>
  at (wrapper managed-to-native) System.Reflection.Assembly.GetTypes (bool)
<0xffffffff>
  at System.Reflection.Assembly.GetTypes () <0x00010>
  at DbLinq.Factory.Implementation.ReflectionObjectFactory.Parse
(System.Reflection.Assembly,System.Collections.Generic.IDictionary`2) <0x0002c>
  at DbLinq.Factory.Implementation.ReflectionObjectFactory.ParseAppDomain ()
<0x000c1>
  at DbLinq.Factory.Implementation.ReflectionObjectFactory.get_Implementations
() <0x00037>
  at DbLinq.Factory.Implementation.ReflectionObjectFactory.GetNewInstance
(System.Type) <0x0004a>
  at DbLinq.Factory.Implementation.ReflectionObjectFactory.GetSingleton
(System.Type) <0x00049>
  at DbLinq.Factory.Implementation.ReflectionObjectFactory.GetInstance
(System.Type,bool) <0x00042>
  at DbLinq.Factory.Implementation.AbstractObjectFactory.Get () <0x00018>
  at DbLinq.Factory.ObjectFactory.Get () <0x0002b>
  at DbLinq.Linq.DataContext..ctor
(DbLinq.Linq.Database.IDatabaseContext,System.Data.Linq.Mapping.MappingSource,DbLinq.Vendor.IVendor)
<0x000f0>
  at DbLinq.Linq.DataContext..ctor
(DbLinq.Linq.Database.IDatabaseContext,DbLinq.Vendor.IVendor) <0x00012>
  at DbLinq.Linq.DataContext..ctor
(System.Data.IDbConnection,DbLinq.Vendor.IVendor) <0x00031>
..
  at (wrapper runtime-invoke) System.Object.runtime_invoke_void
(object,intptr,intptr,intptr) <0xffffffff>

This application has requested the Runtime to terminate it in an unusual way.
Please contact the application's support team for more information.

Expected:

application should exit after run.


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