xamarin/xamarin-macios

Bridges the worlds of .NET with the native APIs of Mac, iOS, tvOS, and watchOS. This is the dev channel for the xamarin-macios platform, for general programming questions, such as the usage of an specific API please use stackoverflow or the forums.

Alex Soto

@dalexsoto

Thanks!

Jay Krell

@jaykrell

The pinned handles do allow a precise scan.

Under cooperative suspend, all the roots will be in a handle.

But compaction is not allowed, as copies of the roots
might be in registers.

Or saved elswewhere in stack (nonvolatile registers in a call).

But still in the TLS to keep alive, and pinned.

They are manually written-through, but not explicitly repeatedly read.

oops wrong channel (off by one)

Gareth Pym

@gonz01d

@dalexsoto I've got a repro project (essentially a branch of the existing binding I'd forked and was enabling extra functionality on) and created an issue: xamarin/xamarin-macios#6885
If you need any extra detail let me know

Alex Soto

@dalexsoto

Thanks!

I’ll have a look!

We think we have a fix, I am just hoping that it will also apply to you

Gareth Pym

@gonz01d

Fingers crossed 🤞🏻

Gareth Pym

@gonz01d

Hey @dalexsoto, be good to hear any update on the above. Are you able to run up the sample project in xamarin/xamarin-macios#6885 ok? Is there anything you'd like me to test/try?

Alex Soto

@dalexsoto

Hey @gonz01d your issue is different, the binding is incorrect, I will post an answer to your github issue shortly

Today is a holiday in the US, sorry for the lack of response earlier today

Filip Navara

@filipnavara

Ohhh! That explains why it looked like everyone suddenly died.

Alex Soto

@dalexsoto

lol

Filip Navara

@filipnavara

(Not kidding, thanks for explanation)

Alex Soto

@dalexsoto

haha no problem, I am also in the US but I do not know how to take days off…

Alex Soto

@dalexsoto

@gonz01d let me know if that works for you.

Gareth Pym

@gonz01d

@dalexsoto Many thanks for replying and posting on the issue - and on a holiday too. I'll take a look

Alex Soto

@dalexsoto

:+1:

Enjoy your time off!

Gareth Pym

@gonz01d

@dalexsoto I wish, lol - I actually meant kudos to you for replying when you were off on Labour day 😁

That fix of yours works and has resolved my issue - cheers ! I haven't quite got my head around the how and why the change you passed on fixes the issue but I'm glad it's working!

I've also added a comment on the issue following @rolfbjarne 's comment about the generator

Alex Soto

@dalexsoto

Yeah, sharpie is not smart enough to figure that out yet :smile:

Glad it is working and yup I agree this should be a generator error instead, I'll fill a different issue for it

Thanks for confirming back that it works!

Prathu Singh

@prathusingh

Hello I am getting this error:
Does any body have an idea?
I am using mono 6.4.0

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.

=================================================================

Native stacktrace:

Prathu Singh

@prathusingh

Here is the complete stack trace
`================================================================

Native Crash Reporting

=================================================================
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.

=================================================================

Native stacktrace:

=================================================================
0x10daa995b - /Library/Frameworks/Mono.framework/Versions/6.4.0/bin/mono : mono_dump_native_crash_info
0x10da428d5 - /Library/Frameworks/Mono.framework/Versions/6.4.0/bin/mono : mono_handle_native_crash
0x10daa8eb1 - /Library/Frameworks/Mono.framework/Versions/6.4.0/bin/mono : sigabrt_signal_handler
0x7fff77a6bb5d - /usr/lib/system/libsystem_platform.dylib : _sigtramp
0x7fff77a2e282 - /usr/lib/system/libsystem_malloc.dylib : tiny_free_no_lock
0x7fff779256a6 - /usr/lib/system/libsystem_c.dylib : abort
0x7fff77a34077 - /usr/lib/system/libsystem_malloc.dylib : malloc_vreport
0x7fff77a33e38 - /usr/lib/system/libsystem_malloc.dylib : malloc_report
0x10db27d36 - /Library/Frameworks/Mono.framework/Versions/6.4.0/bin/mono : mono_assembly_name_free
0x10db2891b - /Library/Frameworks/Mono.framework/Versions/6.4.0/bin/mono : mono_assembly_load_with_partial_name_internal
0x10db69a65 - /Library/Frameworks/Mono.framework/Versions/6.4.0/bin/mono : ves_icall_System_Reflection_Assembly_load_with_partial_name_raw
0x115a06bba - Unknown
0x10f666d3b - /Library/Frameworks/Mono.framework/Versions/6.4.0/lib/mono/4.5/mscorlib.dll.dylib : System_Runtime_Serialization_Formatters_Binary_ObjectReader_Bind_string_string
0x10f65ab78 - /Library/Frameworks/Mono.framework/Versions/6.4.0/lib/mono/4.5/mscorlib.dll.dylib : System_Runtime_Serialization_Formatters_Binary_ObjectMap_Create_string_string_System_Runtime_Serialization_Formatters_BinaryBinaryTypeEnumobjectintSystem_Runtime_Serialization_Formatters_Binary_ObjectReader_int_System_Runtime_Serialization_Formatters_Binary_BinaryAssemblyInfo_System_Runtime_Serialization_Formatters_Binary_SizedArray
0x10f66d5a3 - /Library/Frameworks/Mono.framework/Versions/6.4.0/lib/mono/4.5/mscorlib.dll.dylib : System_Runtime_Serialization_Formatters_Binary_BinaryParser_ReadObjectWithMapTyped_System_Runtime_Serialization_Formatters_Binary_BinaryObjectWithMapTyped
0x10f66d455 - /Library/Frameworks/Mono.framework/Versions/6.4.0/lib/mono/4.5/mscorlib.dll.dylib : System_Runtime_Serialization_FormattersBinaryBinaryParser_ReadObjectWithMapTyped_System_Runtime_Serialization_Formatters_Binary_BinaryHeaderEnum
0x10f6639c0 - /Library/Frameworks/Mono.framework/Versions/6.4.0/lib/mono/4.5/mscorlib.dll.dylib : System_Runtime_Serialization_Formatters_Binary_ObjectReader_Deserialize_System_Runtime_Remoting_Messaging_HeaderHandler_System_Runtime_Serialization_Formatters_Binary___BinaryParser_bool_bool_System_Runtime_Remoting_Messaging_IMethodCallMessage
0x10f65d090 - /Library/Frameworks/Mono.framework/Versions/6.4.0/lib/mono/4.5/mscorlib.dll.dylib : System_Runtime_Serialization_Formatters_Binary_BinaryFormatter_Deserialize_System_IO_Stream_System_Runtime_Remoting_Messaging_HeaderHandler_bool_System_Runtime_Remoting_Messaging_IMethodCallMessage
0x115f8a0fb - Unknown
0x115497190 - Unknown
0x1154917cb - Unknown
0x115490aa3 - Unknown
0x115490913 - Unknown

=================================================================

Telemetry Dumper:

=================================================================
Pkilling 0x7000052ec000 from 0x7000044d7000
Pkilling 0x700003c05000 from 0x7000044d7000
Pkilling 0x7000050e9000 from 0x7000044d7000
Pkilling 0x700004ee6000 from 0x7000044d7000
Pkilling 0x700004ce3000 from 0x7000044d7000
Pkilling 0x700004ae0000 from 0x7000044d7000
Pkilling 0x7000048dd000 from 0x7000044d7000
Pkilling 0x118ca65c0 from 0x7000044d7000
Pkilling 0x7000046da000 from 0x7000044d7000
Pkilling 0x700004291000 from 0x7000044d7000
Pkilling 0x7`

Rolf Bjarne Kvinge

@rolfbjarne

that looks like a memory corruption

if you have a test case, I'd file a bug so that we can fix it

Gareth Pym

@gonz01d

@dalexsoto No problem, really appreciate your help 👍🏻

Vincent Dondain

@VincentDondain

Team did you know we can create Xamarin.iOS templates in like 1 second with command line? Just discovered this while updating the templates for Xcode 11

dotnet new ios-app

you can also choose a special kind like dotnet new ios-app -k single-view

Sebastien Pouliot

@spouliot

nice, it was one (of many) goals for .net5

should be easier to automate (template) tests too :smile:

IoTFier

@IoTFier

Looks like we are headed back to DOS by building applications using command prompts and scripts.. Who needs IDE anyways ;)

Filip Navara

@filipnavara

I actually use dotnet and git from command line and VS Code for editing. It's not that unusual combination :)

Dan Siegel

@dansiegel

Has anyone come across a NullReferenceException on Xamarin.iOS that seems to be coming from Mono? I can't seem to catch this in any try catch blocks but I'm getting this in the debug output

System.NullReferenceException: Object reference not set to an instance of an object.
   at Mono.Debugging.Soft.SoftDebuggerSession.HandleBreakEventSet(Event[] es, Boolean dequeuing) in E:\A\_work\3253\s\external\debugger-libs\Mono.Debugging.Soft\SoftDebuggerSession.cs:line 1799
   at Mono.Debugging.Soft.SoftDebuggerSession.HandleEventSet(EventSet es) in E:\A\_work\3253\s\external\debugger-libs\Mono.Debugging.Soft\SoftDebuggerSession.cs:line 1589
   at Mono.Debugging.Soft.SoftDebuggerSession.EventHandler() in E:\A\_work\3253\s\external\debugger-libs\Mono.Debugging.Soft\SoftDebuggerSession.cs:line 1489

Chris Hamons

@chamons

That looks like an exception inside the debug engine - Please file an issue https://github.com/xamarin/xamarin-macios/issues/new with the full IDE.log and if you can provide steps to reproduce that’s be wonderful

IoTFier

@IoTFier

@chamons , @spouliot , @dalexsoto , @rolfbjarne - how are you all doing ? After upgrading Xcode to 11, 1> I am able to see simulators for only limited set of devices via VS Windows , 2> Running my app on iPhone 11 Max Pro doesn't render the App.. it shows only blank screen. But, I am able see deployed App when accessed that simulator on the Mac, including running App in the simulator on the Mac. Is it likely because the version of Xamarin.iOS is not ready to work with XCode 11 ?

Alex Soto

@dalexsoto

Unfortunately the Xcode 11 final came way to late yesterday

There is going to be a new version that supports it soon

But definitely not over the weekend :smile:

IoTFier

@IoTFier

Monday ? along with .Net Core 3 GA and VS 2019 16.3 ?

Alex Soto

@dalexsoto

Yep

IoTFier

@IoTFier

whew whewwwwwww

that will be lovely

what about seeing simulator for older devices ?

Alex Soto

@dalexsoto

So, sorry for making you waiting but the full support should be out of the box soon

IoTFier

@IoTFier

now worries @dalexsoto .. you all are working very hard to help us help our mutual customers... All good as long as issues are addressed

IoTFier

@IoTFier

getting error framework not found WatchKit

I installed a simulator for apple watch 5 on mac.. but VS Xamarin.iOS is not picking it up during my app build.. I guess this will be addressed on Monday. Correct ?

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