[Xamarin.Android.Build.Tasks] _UpdateAndroidResgen is throwing new AP… #823
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…T0000 errors in d15-4 (dotnet#769) Fixes: https://bugzilla.xamarin.com/show_bug.cgi?id=58889 Fixes: https://bugzilla.xamarin.com/show_bug.cgi?id=58890 Commit 0667a2b and ea6b9b4 added support for short path names. However during the rework we added code to replace library_project_imports/ with an empty string. Some of the Nuget Support packages seem to include a `__AndroidLibraryProjects__.zip` which uses windows path sepatators rather than unix ones. So the code to strip off the `library_project_imports/` does not work. We end up with a directory structure like __library_projects__/[dllname]/library_project_imports/library_project_imports which a) does not get picked up by our tasks and b) takes up a bunch of additional characters in our already long path.. The result is the two errors above... one to do with missing resources the other a PathToLong error. Because the nuget packages have already shipped and will be in use, we need to handle BOTH cases.
jonpryor
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Context: dotnet/java-interop@ebd7d76 Context: dotnet/java-interop@f9faaab Changes: dotnet/java-interop@a3de91e...f9faaab * dotnet/java-interop@f9faaaba: [jcw-gen] Skip interface types (#825) * dotnet/java-interop@64399900: [Java.Interop.Tools.JavaCallableWrappers] Fix typo. * dotnet/java-interop@ebd7d761: [Java.Interop.Tools.JavaCallableWrappers] Include interfaces in type maps (#824) * dotnet/java-interop@002dea4a: Bump to xamarin/xamarin-android-tools/main@d92fc3e3 (#823) Fix a runtime assertion failure within a `Java.Interop.JniPeerMembers` constructor when `JniRuntime.JniTypeManager.GetTypeSignature()` is used with a bound interface type: var type = typeof(global::Java.Lang.Iterable); var sig = JniEnvironment.Runtime.TypeManager.GetTypeSignature(type); var jniType = sig.JniTypeName; The expectation is that `jniType` should be `java/lang/Iterable`. In actuality, `jniType` was the empty string `""`. When `JniTypeSignature.JniTypeName` didn't match the expected value, an assertion failed, causing the app to crash: ---- DEBUG ASSERTION FAILED ---- ---- Assert Short Message ---- ManagedPeerType <=> JniTypeName Mismatch! javaVM.GetJniTypeInfoForType(typeof(Java.Lang.IIterable)).JniTypeName="" != "java/lang/Iterable" ---- Assert Long Message ---- at System.Diagnostics.DebugProvider.Fail(String message, String detailMessage) at System.Diagnostics.Debug.Fail(String message, String detailMessage) at System.Diagnostics.Debug.Assert(Boolean condition, String message, String detailMessage) at System.Diagnostics.Debug.Assert(Boolean condition, String message) at Java.Interop.JniPeerMembers..ctor(String jniPeerTypeName, Type managedPeerType, Boolean checkManagedPeerType, Boolean isInterface) Process terminated due to "ManagedPeerType <=> JniTypeName Mismatch! javaVM.GetJniTypeInfoForType(typeof(Java.Lang.IIterable)).JniTypeName="" != "java/lang/Iterable" … The "cause" of the crash is that type map files did not contain interfaces. There was no actual "need" to store typemap data for interfaces, as the most common use of `JniPeerMembers` was for bound types, and our interface bindings (mostly) didn't use `JniPeerMembers`, so the lack of typemap data for interfaces wasn't a problem. This "lack of need" changed with dotnet/java-interop@29f97075, when Java default interface methods were bound as C# Interface Default Members. *Now*, interface bindings *can* use `JniPeerMembers`: public partial interface IIterable : IJavaObject, IJavaPeerable { private static readonly JniPeerMembers _members = new XAPeerMembers ("java/lang/Iterable", typeof (IIterable), isInterface: true); virtual unsafe void ForEach(Java.Util.Functions.IConsumer action) => … } *However*, the assertion is only reached if a default interface method is executed, as that's what causes e.g. `IIterable._members` to be constructed, triggering the assertion. Related question: why didn't we see this back in Fall 2020? Two reasons: 1. Most important, this was a `Debug.Assert()` assertion, which in turn requires that the assembly be built with `DEBUG` defined. This is *never* the case for assemblies shipped to customers; those are built in the Release configuration. Thus, this could only happen to developers/maintainers of Xamarin.Android. 2. When *Mono* is used, `Debug.Assert()` prints out a message, and continues execution. The process does not crash. This changes with .NET 6: `Debug.Assert()` failures will abort the process! Thus, the only "reasonable" way to trigger this assert was to: 1. Be a maintainer of xamarin-android, and have Debug builds of the product. 2. Be running on .NET 6. 3. "Just happen" to be running an app that makes use of interface default members. In this particular case, the [HelloMaui][0] sample. The fix is twofold: 1. Start including interfaces within typemaps. 2. Update Java Callable Wrapper generation to *ignore* interfaces. This is necessary because our Java Callable Wrapper infrastructure doesn't support "exporting" C# interfaces to Java, and will thus throw an exception if we attempt to do so. This allows `HelloMaui` to launch on .NET 6 with Debug builds of Xamarin.Android without triggering the assertion. [0]: https://github.com/dotnet/net6-mobile-samples/tree/46129f85d78b55589280e5bb0ea399bb1dd72167/HelloMaui
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…T0000 errors in d15-4 (#769)
Fixes: https://bugzilla.xamarin.com/show_bug.cgi?id=58889
Fixes: https://bugzilla.xamarin.com/show_bug.cgi?id=58890
Commit 0667a2b and ea6b9b4 added support for short path names.
However during the rework we added code to replace
with an empty string. Some of the Nuget Support packages seem
to include a
__AndroidLibraryProjects__.zipwhich useswindows path sepatators rather than unix ones. So the code
to strip off the
library_project_imports/does not work.We end up with a directory structure like
which a) does not get picked up by our tasks and b) takes up
a bunch of additional characters in our already long path..
The result is the two errors above... one to do with missing resources
the other a PathToLong error.
Because the nuget packages have already shipped and will be in use,
we need to handle BOTH cases.