Try putting this in your code and calling it from FinishedLaunching
private void MonoTouchForcedCompilationHacks()
{
{
var hack1 = new IFooSession[0];
if(!((ICollection<
IFooSession>)hack1).Contains(// some bogus lambda or other thing to force the
system to evaluate the collection))
{
blah blah blah log some crap here or
whatever
}
}
}
Could put this anywhere I guess, but I got tired of dealing with jit errors and
stuck all this sort of stuff in one place for the sake of organization.
Then again, it could be your sample values in the code that are making baby
jeebus cry -- and MT is watching! :)
-pm
On Sep 8, 2011, at 4:22 PM, Brian Schuth wrote:
> A couple of months back I hit JIT errors when using LINQ for objects. I was
> never able to resolve them, but as the LINQ involved was pretty simple, I
> just "unrolled" it into procedural code.
>
> Now I'm getting more of them, and I'd really prefer to leave the LINQ alone
> if possible. The exception I'm getting today is:
>
> Attempting to JIT compile method
> 'System.Linq.Enumerable:<ToLookup`2>m__18<JIT20110908.ActualScore, int>
> (JIT20110908.ActualScore)' while running with --aot-only.
>
> Below is my ProblemLinq.cs file, which contains a class with an Execute()
> method that causes this error. I realize there's a lot of interfaces and
> classes here; this is a severely dumbed-down version of the actual code,
> which is part of a cross-platform reporting library. The code in question is
> running in Windows as part of a production product.
>
> I've read the "Limitations" section on the xamarin website, and while I can't
> say I understand it totally, I don't see that my code is doing any of the
> verboten virtualization things; although LINQ does enough magic that I don't
> necessarily know the secondary effects of the code.
>
> The stack trace from the error this class causes follows the code.
>
> I'm running MT 4.0.7 and MD2.6.
>
> Am I doing some LINQ thing I shouldn't? Or is MT missing something?
>
> Thanks.
>
> // PROBLEMLINQ.CS -- calling the Execute method on ProblemLinq causes this
> error
> using System;
>
> using System.Linq;
>
> using System.Collections.Generic;
>
>
>
> namespace JIT20110908
>
> {
>
> public class ProblemLinq
>
> {
>
> public ProblemLinq ()
>
> {
>
> }
>
>
> public IList<SummaryRow> Execute ()
>
> {
>
> DateTime startDate = new DateTime (2011, 07, 01);
>
> DateTime endDate = new DateTime (2011, 08, 01);
>
>
> IList<IScore> scores = new List<IScore> ();
>
> ActualScore score1 = new ActualScore () {
>
> Name = "ACTIVITIES",
>
> Score = 22.2,
>
> OwnerID = 666
>
> } ;
>
> scores.Add (score1);
>
>
> IList<IFooSession > sessions = new List<IFooSession> ();
>
> MySession mysession = new MySession () {
>
> SessionDate = new DateTime(2011, 07, 15),
>
> SessionID = 666,
>
> } ;
>
> sessions.Add (mysession);
>
>
> IList<SummaryRow > summaryRows = (from s in sessions
>
> orderby s.SessionDate
>
> join score in
> scores.OfType<ActualScore>()
>
> on s.SessionID equals
> score.OwnerID
>
> where s.SessionDate >= startDate
> && s.SessionDate <= endDate
>
> select new SummaryRow
>
> {
>
> AssessmentDate =
> s.SessionDate,
>
> Name = score.Name,
>
> OwnerID = score.OwnerID
>
> }).ToList ();
>
> return summaryRows;
>
> }
>
> }
>
>
> public interface IScore
>
> {
>
> int OwnerID { get; set; }
>
> string Name { get; set; }
>
> }
>
>
> public class SummaryRow : IScore
>
> {
>
> public string Name { get; set; }
>
> public int OwnerID { get; set; }
>
> public DateTime AssessmentDate { get; set; }
>
> }
>
>
> public interface IFooSession
>
> {
>
> int SessionID { get; set; }
>
> DateTime SessionDate { get; set; }
>
> }
>
>
> public class MySession : IFooSession
>
> {
>
> public int SessionID { get; set; }
>
> public DateTime SessionDate { get; set; }
>
> }
>
>
> public class GeneralScore : IScore
>
> {
>
> public int OwnerID { get; set; }
>
> public string Name { get; set; }
>
> }
>
>
>
> public class ActualScore : GeneralScore
>
> {
>
> public double Score { get; set; }
>
> }
>
> }
>
> // END PROBLEMLINQ.CS
>
>
>
> STACK TRACE FROM ERROR:
>
>
>
>
> Unhandled Exception: System.ExecutionEngineException: Attempting to JIT
> compile method
> 'System.Linq.Enumerable:<ToLookup`2>m__18<JIT20110908.ActualScore, int>
> (JIT20110908.ActualScore)' while running with --aot-only.
>
>
>
> at System.Linq.Enumerable.ToLookup[ActualScore,Int32,ActualScore]
> (IEnumerable`1 source, System.Func`2 keySelector, System.Func`2
> elementSelector, IEqualityComparer`1 comparer) [0x00079] in
> /Developer/MonoTouch/Source/mono/mcs/class/System.Core/System.Linq/Enumerable.cs:2915
>
>
> at System.Linq.Enumerable.ToLookup[ActualScore,Int32] (IEnumerable`1
> source, System.Func`2 keySelector, IEqualityComparer`1 comparer) [0x00000] in
> /Developer/MonoTouch/Source/mono/mcs/class/System.Core/System.Linq/Enumerable.cs:2883
>
>
> at
> System.Linq.Enumerable+<CreateJoinIterator>c__IteratorB`4[JIT20110908.IFooSession,JIT20110908.ActualScore,System.Int32,<>__AnonType0`2[JIT20110908.IFooSession,JIT20110908.ActualScore]].MoveNext
> () [0x00023] in
> /Developer/MonoTouch/Source/mono/mcs/class/System.Core/System.Linq/Enumerable.cs:1153
>
>
> at
> System.Linq.Enumerable+<CreateWhereIterator>c__Iterator1E`1[<>__AnonType0`2[JIT20110908.IFooSession,JIT20110908.ActualScore]].MoveNext
> () [0x00000] in <filename unknown>:0
>
> at
> System.Linq.Enumerable+<CreateSelectIterator>c__Iterator10`2[<>__AnonType0`2[JIT20110908.IFooSession,JIT20110908.ActualScore],JIT20110908.SummaryRow].MoveNext
> () [0x00000] in <filename unknown>:0
>
> at System.Collections.Generic.List`1[JIT20110908.SummaryRow].AddEnumerable
> (IEnumerable`1 enumerable) [0x00000] in <filename unknown>:0
>
> at System.Collections.Generic.List`1[JIT20110908.SummaryRow]..ctor
> (IEnumerable`1 collection) [0x00000] in <filename unknown>:0
>
> at System.Linq.Enumerable.ToList[SummaryRow] (IEnumerable`1 source)
> [0x00000] in <filename unknown>:0
>
> at JIT20110908.ProblemLinq.Execute () [0x0009f] in
> /Users/alphce/Projects/JIT20110908/JIT20110908/ProblemLinq.cs:33
>
> at JIT20110908.AppDelegate.FinishedLaunching (MonoTouch.UIKit.UIApplication
> app, MonoTouch.Foundation.NSDictionary options) [0x00011] in
> /Users/alphce/Projects/JIT20110908/JIT20110908/Main.cs:29
>
> at MonoTouch.UIKit.UIApplication.Main (System.String[] args, System.String
> principalClassName, System.String delegateClassName) [0x00000] in <filename
> unknown>:0
>
> at MonoTouch.UIKit.UIApplication.Main (System.String[] args) [0x00000] in
> <filename unknown>:0
>
> at JIT20110908.Application.Main (System.String[] args) [0x00000] in
> /Users/alphce/Projects/JIT20110908/JIT20110908/Main.cs:13
>
> [ERROR] FATAL UNHANDLED EXCEPTION: System.ExecutionEngineException:
> Attempting to JIT compile method
> 'System.Linq.Enumerable:<ToLookup`2>m__18<JIT20110908.ActualScore, int>
> (JIT20110908.ActualScore)' while running with --aot-only.
>
>
>
> at System.Linq.Enumerable.ToLookup[ActualScore,Int32,ActualScore]
> (IEnumerable`1 source, System.Func`2 keySelector, System.Func`2
> elementSelector, IEqualityComparer`1 comparer) [0x00079] in
> /Developer/MonoTouch/Source/mono/mcs/class/System.Core/System.Linq/Enumerable.cs:2915
>
>
> at System.Linq.Enumerable.ToLookup[ActualScore,Int32] (IEnumerable`1
> source, System.Func`2 keySelector, IEqualityComparer`1 comparer) [0x00000] in
> /Developer/MonoTouch/Source/mono/mcs/class/System.Core/System.Linq/Enumerable.cs:2883
>
>
> at
> System.Linq.Enumerable+<CreateJoinIterator>c__IteratorB`4[JIT20110908.IFooSession,JIT20110908.ActualScore,System.Int32,<>__AnonType0`2[JIT20110908.IFooSession,JIT20110908.ActualScore]].MoveNext
> () [0x00023] in
> /Developer/MonoTouch/Source/mono/mcs/class/System.Core/System.Linq/Enumerable.cs:1153
>
>
> at
> System.Linq.Enumerable+<CreateWhereIterator>c__Iterator1E`1[<>__AnonType0`2[JIT20110908.IFooSession,JIT20110908.ActualScore]].MoveNext
> () [0x00000] in <filename unknown>:0
>
> at
> System.Linq.Enumerable+<CreateSelectIterator>c__Iterator10`2[<>__AnonType0`2[JIT20110908.IFooSession,JIT20110908.ActualScore],JIT20110908.SummaryRow].MoveNext
> () [0x00000] in <filename unknown>:0
>
> at System.Collections.Generic.List`1[JIT20110908.SummaryRow].AddEnumerable
> (IEnumerable`1 enumerable) [0x00000] in <filename unknown>:0
>
> at System.Collections.Generic.List`1[JIT20110908.SummaryRow]..ctor
> (IEnumerable`1 collection) [0x00000] in <filename unknown>:0
>
> at System.Linq.Enumerable.ToList[SummaryRow] (IEnumerable`1 source)
> [0x00000] in <filename unknown>:0
>
> at JIT20110908.ProblemLinq.Execute () [0x0009f] in
> /Users/alphce/Projects/JIT20110908/JIT20110908/ProblemLinq.cs:33
>
> at JIT20110908.AppDelegate.FinishedLaunching (MonoTouch.UIKit.UIApplication
> app, MonoTouch.Foundation.NSDictionary options) [0x00011] in
> /Users/alphce/Projects/JIT20110908/JIT20110908/Main.cs:29
>
> at MonoTouch.UIKit.UIApplication.Main (System.String[] args, System.String
> principalClassName, System.String delegateClassName) [0x00000] in <filename
> unknown>:0
>
> at MonoTouch.UIKit.UIApplication.Main (System.String[] args) [0x00000] in
> <filename unknown>:0
>
> at JIT20110908.Application.Main (System.String[] args) [0x00000] in
> /Users/alphce/Projects/JIT20110908/JIT20110908/Main.cs:13
>
> Terminating runtime due to unhandled exception
>
> Stacktrace:
>
>
>
>
>
> Native stacktrace:
>
>
>
> 0 JIT20110908 0x002653dc
> mono_handle_native_sigsegv + 412
>
> 1 JIT20110908 0x0028c5c8
> sigabrt_signal_handler + 148
>
> 2 libsystem_c.dylib 0x3564172f _sigtramp + 42
>
> 3 libsystem_c.dylib 0x356363bb pthread_kill + 58
>
> 4 libsystem_c.dylib 0x3562ebff abort + 78
>
> 5 JIT20110908 0x003a15bc monoeg_g_logv + 248
>
> 6 JIT20110908 0x003a1650
> monoeg_assertion_message + 44
>
> 7 JIT20110908 0x00246e7c mono_thread_abort +
> 224
>
> 8 JIT20110908 0x00264824
> mono_handle_exception_internal + 2436
>
> 9 JIT20110908 0x0026510c
> mono_handle_exception + 108
>
> 10 JIT20110908 0x0028a5dc
> mono_arm_throw_exception + 324
>
> 11 JIT20110908 0x0019547c throw_exception + 48
>
> 12 JIT20110908 0x00249e50
> mono_jit_compile_method + 136
>
> 13 JIT20110908 0x003337ec mono_compile_method
> + 84
>
> 14 JIT20110908 0x00268110
> mono_delegate_trampoline + 904
>
> 15 JIT20110908 0x00194f64
> generic_trampoline_delegate + 136
>
> 16 JIT20110908 0x001f3254
> System_Linq_Enumerable_ToLookup_JIT20110908_ActualScore_int_System_Collections_Generic_IEnumerable_1_JIT20110908_ActualScore_System_Func_2_JIT20110908_ActualScore_int_System_Collections_Generic_IEqualityComparer_1_int
> + 228
>
> 17 JIT20110908 0x001f0c58
> System_Linq_Enumerable__CreateJoinIteratorc__IteratorB_4_JIT20110908_IFooSession_JIT20110908_ActualScore_int____AnonType0_2_JIT20110908_IFooSession_JIT20110908_ActualScore_MoveNext
> + 432
>
> 18 JIT20110908 0x00004ac0
> System_Linq_Enumerable__CreateWhereIteratorc__Iterator1E_1_MoveNext + 456
>
> 19 JIT20110908 0x00004644
> System_Linq_Enumerable__CreateSelectIteratorc__Iterator10_2_MoveNext + 432
>
> 20 JIT20110908 0x000ad5d8
> System_Collections_Generic_List_1_AddEnumerable_System_Collections_Generic_IEnumerable_1_T
> + 188
>
> 21 JIT20110908 0x000acd68
> System_Collections_Generic_List_1__ctor_System_Collections_Generic_IEnumerable_1_T
> + 132
>
> 22 JIT20110908 0x000030f8
> System_Linq_Enumerable_ToList_TSource_System_Collections_Generic_IEnumerable_1_TSource
> + 68
>
> 23 JIT20110908 0x001e6be0
> JIT20110908_ProblemLinq_Execute + 2604
>
> 24 JIT20110908 0x001e5e98
> JIT20110908_AppDelegate_FinishedLaunching_MonoTouch_UIKit_UIApplication_MonoTouch_Foundation_NSDictionary
> + 300
>
> 25 JIT20110908 0x00164c88
> wrapper_runtime_invoke_object_runtime_invoke_dynamic_intptr_intptr_intptr_intptr
> + 200
>
> 26 JIT20110908 0x0024af20
> mono_jit_runtime_invoke + 2800
>
> 27 JIT20110908 0x00339bfc mono_runtime_invoke
> + 140
>
> 28 JIT20110908 0x003bf834 monotouch_trampoline
> + 2840
>
> 29 UIKit 0x31120821 -[UIApplication
> _callInitializationDelegatesForURL:payload:suspended:] + 772
>
> 30 UIKit 0x3111ab65 -[UIApplication
> _runWithURL:payload:launchOrientation:statusBarStyle:statusBarHidden:] + 272
>
> 31 UIKit 0x310ef7d7 -[UIApplication
> handleEvent:withNewEvent:] + 1114
>
> 32 UIKit 0x310ef215 -[UIApplication
> sendEvent:] + 44
>
> 33 UIKit 0x310eec53
> _UIApplicationHandleEvent + 5090
>
> 34 GraphicsServices 0x31a7ae77 PurpleEventCallback
> + 666
>
> 35 CoreFoundation 0x3718ea97
> __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE1_PERFORM_FUNCTION__ + 26
>
> 36 CoreFoundation 0x3719083f __CFRunLoopDoSource1
> + 166
>
> 37 CoreFoundation 0x3719160d __CFRunLoopRun + 520
>
> 38 CoreFoundation 0x37121ec3 CFRunLoopRunSpecific
> + 230
>
> 39 CoreFoundation 0x37121dcb CFRunLoopRunInMode +
> 58
>
> 40 UIKit 0x31119d49 -[UIApplication
> _run] + 372
>
> 41 UIKit 0x31117807 UIApplicationMain +
> 670
>
> 42 JIT20110908 0x0006656c
> wrapper_managed_to_native_MonoTouch_UIKit_UIApplication_UIApplicationMain_int_string___intptr_intptr
> + 240
>
> 43 JIT20110908 0x000528bc
> MonoTouch_UIKit_UIApplication_Main_string__ + 36
>
> 44 JIT20110908 0x001e60a0
> JIT20110908_Application_Main_string__ + 128
>
> 45 JIT20110908 0x00164c88
> wrapper_runtime_invoke_object_runtime_invoke_dynamic_intptr_intptr_intptr_intptr
> + 200
>
> 46 JIT20110908 0x0024af20
> mono_jit_runtime_invoke + 2800
>
> 47 JIT20110908 0x00339bfc mono_runtime_invoke
> + 140
>
> 48 JIT20110908 0x0033cbac
> mono_runtime_exec_main + 784
>
> 49 JIT20110908 0x0033bc10
> mono_runtime_run_main + 1048
>
> 50 JIT20110908 0x002526d0 mono_jit_exec + 216
>
> 51 JIT20110908 0x002454f8 main + 3448
>
> 52 JIT20110908 0x00002774 start + 52
>
>
>
> Debug info from gdb:
>
>
>
>
>
> =================================================================
>
> Got a SIGABRT while executing native code. This usually indicates
>
> a fatal error in the mono runtime or one of the native libraries
>
> used by your application.
>
> =================================================================
>
>
>
>
> --
> Brian Schuth
> ALPHCE, Inc.
> Eastport, ME
> +1 207 370 2430
> [email protected]
>
> _______________________________________________
> MonoTouch mailing list
> [email protected]
> http://lists.ximian.com/mailman/listinfo/monotouch
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