[Mono-dev] System.ExecutionEngineException: Failed to create shadow copy (CopyFile).

[Alistair Bush]

So I have finally figured out ( hopefully ) the underlying issue.

Basically the code is attempting to invoke methods, e.g. IsConcrete, of a
Type which has as an instance variable of a type which is not available.

It seems that mono must then attempt to fulling resolve this instance
information of that type and fail.

I have raised the bug
https://bugzilla.xamarin.com/show_bug.cgi?id=17010 While I think I
have most things there it is getting rather late so will
re-read it tomorrow to make sure i'm not braindead.

Then its just trying to fix it... :)


On Sat, Dec 28, 2013 at 7:22 AM, Rodrigo Kumpera <kumpera at gmail.com> wrote:

> It depends on what information you're trying to inspect. It should have
> the same laziness in resolving type information as .NET.
>
> Where in the inspected type does the missing assembly come into play?
>
> It should be simple to build a test case for that, just delete one
> assembly after compilation is done.
>
>
> On Fri, Dec 27, 2013 at 11:18 AM, Alistair Bush <alistair.bush at gmail.com>wrote:
>
>> Just wanted to follow up with this here first before I create a bug
>> report.
>>
>> I believe I have tracked down the issue here.
>>
>> Fubu, the creating app, is setting up an app domain whose private bin
>> directory is at another path.   To ensure it can resolve its types is it
>> copying a set of Assemblies by
>> name x.RequireAssembly("Owin.Extensions"); or by containing
>> type x.RequireAssemblyContainingType<IActivator>();.
>>
>> It is then calling a remote proxy of a class which Fubu itself contains
>> (using messaging) which attempts to
>>
>> var assemblies = list.SelectMany(x => AssembliesFromPath(x));
>> var pool = new TypePool();
>> pool.IgnoreExportTypeFailures = true;
>>
>> pool.AddAssemblies(assemblies);
>> return pool.TypesMatching(x => x.IsConcreteTypeOf<IApplicationSource>()
>> && x.IsConcreteWithDefaultCtor());
>>
>> It is at this point that it blows up on inspecting the type.
>>
>> I was able to work around this by copying a dependency of Fubu into the
>> target bin directory.  The dependency was Selenium's WebDriver dll, which
>> as far as I can see is not utilised directly from the code actually
>> executing.
>>
>> So does mono require all referenced dependencies of a library to be
>> available before you can inspect Type information?
>>
>>
>> On Tue, Dec 24, 2013 at 10:58 PM, Alistair Bush <alistair.bush at gmail.com>wrote:
>>
>>> Small.....  Not currently, I will attempt to create one tho.   Also will
>>> raise a bug report on this as well sometime this week.   Probably not
>>> tomorrow :)
>>>  On 24/12/2013 7:32 PM, "Rodrigo Kumpera" <kumpera at gmail.com> wrote:
>>>
>>>> Do you have a small test case that shows this behavior? Could you file
>>>> a bug report on this?
>>>>
>>>>
>>>> On Mon, Dec 23, 2013 at 6:57 AM, Alistair Bush <alistair.bush at gmail.com
>>>> > wrote:
>>>>
>>>>> I have be working to get the fubu (mvc) framework and associated tools
>>>>> working on mono/linux.
>>>>> I have gotten most of the way to running a basic app but have sadly
>>>>> come stuck on the following and am running out of ideas.
>>>>>
>>>>> Basically I have setup a 'web' project using fubu new and am
>>>>> attempting to run it by calling fubu run.
>>>>>
>>>>> Sadly i'm getting the output [1] and as you will be able to see this
>>>>> is caused by a ExecutionEngineException when attempting to call
>>>>> Type.IsAssignableFrom.
>>>>>
>>>>> At this particular point in the code it is my understanding that the
>>>>> application is within a separate app domain ( see
>>>>> Bottles.Services.Remote.RemoteServicesProxy ).
>>>>>
>>>>> This is anything which should be stopping mono from inspecting Type
>>>>> information on a Type when within a separate app domain?
>>>>>
>>>>> Also it the moment im a little stuck on how to get more information to
>>>>> debug this issue.  Any suggestions would be welcomed.   Thanks.
>>>>>
>>>>>
>>>>>
>>>>> [1]
>>>>> $ fubu run --directory src/fubutest
>>>>> Alias is returning '/home/alistair/Projects/fubu/tests/fubutest'
>>>>> Alias is returning 'src/fubutest'
>>>>> Assembly bin path is bin
>>>>> The configuration file is
>>>>> /home/alistair/Projects/fubu/tests/fubutest/src/fubutest/Web.config
>>>>> Started service Fubu.Running.RemoteFubuMvcBootstrapper
>>>>> Trying to start application
>>>>> /home/alistair/Projects/fubu/tests/fubutest/src/fubutest with port number
>>>>> 5500
>>>>> FubuMode = Development
>>>>> ERROR: System.ExecutionEngineException: Failed to create shadow copy
>>>>> (CopyFile).
>>>>>
>>>>> Server stack trace:
>>>>>   at (wrapper managed-to-native) System.Type:type_is_assignable_from
>>>>> (System.Type,System.Type)
>>>>>   at System.Type.IsAssignableFrom (System.Type c) [0x00000] in
>>>>> <filename unknown>:0
>>>>>   at FubuCore.TypeExtensions.IsConcreteTypeOf[IApplicationSource]
>>>>> (System.Type pluggedType) [0x00000] in <filename unknown>:0
>>>>>   at Fubu.Running.ApplicationSourceFinder.<Find>m__1 (System.Type x)
>>>>> [0x00000] in <filename unknown>:0
>>>>>   at
>>>>> System.Linq.Enumerable+<CreateWhereIterator>c__Iterator1E`1[System.Type].MoveNext
>>>>> () [0x00000] in <filename unknown>:0
>>>>>   at
>>>>> System.Linq.Enumerable+<CreateDistinctIterator>c__Iterator3`1[System.Type].MoveNext
>>>>> () [0x00000] in <filename unknown>:0
>>>>>   at System.Linq.Enumerable.Any[Type] (IEnumerable`1 source) [0x00000]
>>>>> in <filename unknown>:0
>>>>>   at Fubu.Running.ApplicationSourceChooser.Find
>>>>> (Fubu.Running.StartApplication message, System.Action`1 onFound) [0x00000]
>>>>> in <filename unknown>:0
>>>>>   at Fubu.Running.RemoteFubuMvcBootstrapper.Receive
>>>>> (Fubu.Running.StartApplication message) [0x00000] in <filename unknown>:0
>>>>>   at
>>>>> Bottles.Services.Messaging.MessagingHub+<>c__DisplayClass3`1[Fubu.Running.StartApplication].<Send>b__1
>>>>> (IListener`1 x) [0x00000] in <filename unknown>:0
>>>>>   at
>>>>> System.Collections.Generic.GenericEnumerableExtensions.Each[IListener`1]
>>>>> (IEnumerable`1 values, System.Action`1 eachAction) [0x00000] in <filename
>>>>> unknown>:0
>>>>>   at Bottles.Services.Messaging.MessagingHub.Send[StartApplication]
>>>>> (Fubu.Running.StartApplication message) [0x00000] in <filename unknown>:0
>>>>>   at
>>>>> Bottles.Services.Messaging.MessagingHub+Sender`1[Fubu.Running.StartApplication].Send
>>>>> (System.Object o, Bottles.Services.Messaging.MessagingHub listeners)
>>>>> [0x00000] in <filename unknown>:0
>>>>>   at Bottles.Services.Messaging.MessagingHub.SendJson (System.String
>>>>> json) [0x00000] in <filename unknown>:0
>>>>>   at Bottles.Services.Remote.RemoteServicesProxy.SendJson
>>>>> (System.String json) [0x00000] in <filename unknown>:0
>>>>>   at (wrapper managed-to-native)
>>>>> System.Runtime.Remoting.RemotingServices:InternalExecute
>>>>> (System.Reflection.MethodBase,object,object[],object[]&)
>>>>>   at System.Runtime.Remoting.RemotingServices.InternalExecuteMessage
>>>>> (System.MarshalByRefObject target, IMethodCallMessage reqMsg) [0x00000] in
>>>>> <filename unknown>:0
>>>>>
>>>>> Exception rethrown at [0]:
>>>>>
>>>>>   at System.Runtime.Remoting.Proxies.RealProxy.PrivateInvoke
>>>>> (System.Runtime.Remoting.Proxies.RealProxy rp, IMessage msg,
>>>>> System.Exception& exc, System.Object[]& out_args) [0x00000] in <filename
>>>>> unknown>:0
>>>>> Shutting down finalizer thread timed out.
>>>>> Failed to destroy mutex 0x965988 error code 16 errno 2
>>>>>
>>>>>
>>>>> _______________________________________________
>>>>> Mono-devel-list mailing list
>>>>> Mono-devel-list at lists.ximian.com
>>>>> http://lists.ximian.com/mailman/listinfo/mono-devel-list
>>>>>
>>>>>
>>>>
>>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.ximian.com/pipermail/mono-devel-list/attachments/20140102/26233ab2/attachment.html>