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jonathanpeppersjonathanpeppers
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[Java.Interop] remove DynamicallyAccessedMemberTypes.Interfaces (#1285)
Context: dotnet/android#9630 Context: ec2813a As dotnet/android#9630 required new declarations of `DynamicallyAccessedMemberTypes.Interfaces`, we intestigated to see *why* these were needed in Java.Interop. There are two cases that involve `.Interfaces` within `JniRuntime.JniValueManager.GetValueMarshaler(Type)`: The first case is around attempts to special-case array marshaling for builtin types: var listIface = typeof (IList<>); var listType = (from iface in type.GetInterfaces ().Concat (new[]{type}) where (listIface).IsAssignableFrom (iface.IsGenericType ? iface.GetGenericTypeDefinition () : iface) select iface) .FirstOrDefault (); If `IList<T>` is trimmed away (lol), then *we don't care*, as everything else within `GetValueMarshaler(Type)` still works, and if we can't get a value marshaler for `int[]` (which implements `IList<T>`!), then so be it. Suppress this IL2070 message. The second case is around looking for `[JniValueMarshaler]` on implemented interface types, from ec2813a: JniValueMarshalerAttribute? ifaceAttribute = null; foreach (var iface in type.GetInterfaces ()) { marshalerAttr = iface.GetCustomAttribute<JniValueMarshalerAttribute> (); if (marshalerAttr != null) { if (ifaceAttribute != null) throw new NotSupportedException ($"There is more than one interface with custom marshaler for type {type}."); ifaceAttribute = marshalerAttr; } } if (ifaceAttribute != null) return (JniValueMarshaler) Activator.CreateInstance (ifaceAttribute.MarshalerType)!; It is to support the scenario namespace Android.Runtime { [JniValueMarshaler(typeof(IJavaObjectValueMarshaler))] partial interface /* Android.RuntimIJavaObject {} } namespace Java.Lang { partial class Object : Android.Runtime.IJavaObject {} } to "retrofit" `Java.Lang.Object` and `Java.Lang.Throwable` to use `IJavaObjectValueMarshaler`. There are three problems with this case: 1. It's not actually covered by unit tests! Removing the above `foreach` loop doesn't break any unit tests. 2. While dotnet/android was updated for this scenario, it was only as part of trying to use `jnimarshalmethod-gen` on Xamarin.Android projects, which was never finished. 3. It doesn't "scale": the code throws a `NotSupportedException` if a type implements more than one interface that has `[JniValueMarshaler]`. This isn't used, and *shouldn't* be relied upon. Excise it entirely. With these changes we can remove `DynamicallyAccessedMemberTypes.Interfaces`. I also introduced `build-tools/trim-analyzers/trim-analyzers.props` that will setup the appropriate trimmer MSBuild properties to make trimmer warnings an error. This should keep us from accidentally creating warnings. I only use this setting in projects that were already using `$(EnableAotAnalyzer)`.
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‎build-tools/trim-analyzers/trim-analyzers.props‎

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<!-- Import this to enable trim warnings of all kinds -->
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<Project>
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<PropertyGroup>
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<!-- Sets assembly metadata, enable analyzers -->
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<IsTrimmable>true</IsTrimmable>
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<EnableSingleFileAnalyzer>true</EnableSingleFileAnalyzer>
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<EnableAotAnalyzer>true</EnableAotAnalyzer>
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<!-- In app projects, tells ILLink to emit warnings as errors -->
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<ILLinkTreatWarningsAsErrors>true</ILLinkTreatWarningsAsErrors>
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<!--
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Trim warnings, codes listed here:
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* https://github.com/dotnet/runtime/blob/7403a062960d092c73ce3f07d3ff323ffdf7de43/src/tools/illink/src/linker/Resources/Strings.resx
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* https://github.com/dotnet/docs/tree/9cb45cf9cd34f3b7259a023c3d92a124a87090d5/docs/core/deploying/trimming/trim-warnings
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-->
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<WarningsAsErrors>
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$(WarningsAsErrors);
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IL2000;IL2001;IL2002;IL2003;IL2004;
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IL2005;IL2006;IL2007;IL2008;IL2009;
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IL2010;IL2011;IL2012;IL2013;IL2014;
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IL2015;IL2016;IL2017;IL2018;IL2019;
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IL2020;IL2021;IL2022;IL2023;IL2024;
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IL2025;IL2026;IL2027;IL2028;IL2029;
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IL2030;IL2031;IL2032;IL2033;IL2034;
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IL2035;IL2036;IL2037;IL2038;IL2039;
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IL2040;IL2041;IL2042;IL2043;IL2044;
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IL2045;IL2046;IL2047;IL2048;IL2049;
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IL2050;IL2051;IL2052;IL2053;IL2054;
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IL2055;IL2056;IL2057;IL2058;IL2059;
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IL2060;IL2061;IL2062;IL2063;IL2064;
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IL2065;IL2066;IL2067;IL2068;IL2069;
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IL2070;IL2071;IL2072;IL2073;IL2074;
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IL2075;IL2076;IL2077;IL2078;IL2079;
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IL2080;IL2081;IL2082;IL2083;IL2084;
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IL2085;IL2086;IL2087;IL2088;IL2089;
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IL2090;IL2091;IL2092;IL2093;IL2094;
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IL2095;IL2096;IL2097;IL2098;IL2099;
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IL2100;IL2101;IL2102;IL2103;IL2104;
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IL2105;IL2106;IL2107;IL2108;IL2109;
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IL2110;IL2111;IL2112;IL2113;IL2114;
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IL2115;IL2116;IL2117;IL2118;IL2119;
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IL2120;IL2121;IL2122;IL2123;IL2124;
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IL2125;IL2126;IL2127;IL2128;IL2129;
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</WarningsAsErrors>
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<!-- In NativeAOT app projects, tells Ilc to emit warnings as errors -->
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<IlcTreatWarningsAsErrors>true</IlcTreatWarningsAsErrors>
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<!--
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NativeAOT warnings, codes listed here:
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* https://github.com/dotnet/docs/tree/9cb45cf9cd34f3b7259a023c3d92a124a87090d5/docs/core/deploying/native-aot/warnings
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-->
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<WarningsAsErrors>
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$(WarningsAsErrors);
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IL3050;IL3051;IL3052;IL3053;IL3054;IL3055;IL3056;
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</WarningsAsErrors>
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</PropertyGroup>
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</Project>

‎src/Java.Interop.Tools.TypeNameMappings/Java.Interop.Tools.TypeNameMappings.csproj‎

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<TargetFramework>$(DotNetTargetFramework)</TargetFramework>
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<Nullable>enable</Nullable>
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<AllowUnsafeBlocks>true</AllowUnsafeBlocks>
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<IsTrimmable>true</IsTrimmable>
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<EnableSingleFileAnalyzer>true</EnableSingleFileAnalyzer>
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<EnableAotAnalyzer>true</EnableAotAnalyzer>
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<DefineConstants>$(DefineConstants);JCW_ONLY_TYPE_NAMES;HAVE_CECIL</DefineConstants>
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</PropertyGroup>
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<ImportProject="..\..\TargetFrameworkDependentValues.props" />
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<ImportProject="..\..\build-tools\trim-analyzers\trim-analyzers.props" />
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<ImportProject="..\..\build-tools\scripts\cecil.projitems" />
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<ItemGroup>

‎src/Java.Interop/Java.Interop.csproj‎

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<AllowUnsafeBlocks>true</AllowUnsafeBlocks>
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<Nullable>enable</Nullable>
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<ProduceReferenceAssembly>true</ProduceReferenceAssembly>
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<EnableSingleFileAnalyzer>true</EnableSingleFileAnalyzer>
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<IsTrimmable>true</IsTrimmable>
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<EnableAotAnalyzer>true</EnableAotAnalyzer>
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<MSBuildWarningsAsMessages>NU1702</MSBuildWarningsAsMessages>
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</PropertyGroup>
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<PropertyGroupCondition=" '$(Configuration)' == 'Debug' ">
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<DefineConstants>DEBUG;$(DefineConstants)</DefineConstants>
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</PropertyGroup>
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<ImportProject="..\..\TargetFrameworkDependentValues.props" />
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<ImportProject="..\..\build-tools\trim-analyzers\trim-analyzers.props" />
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<PropertyGroup>
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<DefineConstants>INTEROP;FEATURE_JNIOBJECTREFERENCE_INTPTRS;$(JavaInteropDefineConstants)</DefineConstants>
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<IntermediateOutputPath>$(BaseIntermediateOutputPath)$(Configuration)\$(TargetFramework.ToLowerInvariant())\</IntermediateOutputPath>

‎src/Java.Interop/Java.Interop/JavaArray.cs‎

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publicabstractclassJavaPrimitiveArray<
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[DynamicallyAccessedMembers(ConstructorsAndInterfaces)]
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[DynamicallyAccessedMembers(Constructors)]
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>
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:JavaArray<T>

‎src/Java.Interop/Java.Interop/JavaObject.cs‎

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unsafepublicclassJavaObject:IJavaPeerable
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{
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internalconstDynamicallyAccessedMemberTypesConstructors=DynamicallyAccessedMemberTypes.PublicConstructors|DynamicallyAccessedMemberTypes.NonPublicConstructors;
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internalconstDynamicallyAccessedMemberTypesConstructorsAndInterfaces=Constructors|DynamicallyAccessedMemberTypes.Interfaces;
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readonlystaticJniPeerMembers_members=newJniPeerMembers("java/lang/Object",typeof(JavaObject));
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‎src/Java.Interop/Java.Interop/JavaObjectArray.cs‎

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namespaceJava.Interop
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{
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publicclassJavaObjectArray<
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[DynamicallyAccessedMembers(ConstructorsAndInterfaces)]
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[DynamicallyAccessedMembers(Constructors)]
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T
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>
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refJniObjectReferencereference,
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[DynamicallyAccessedMembers(ConstructorsAndInterfaces)]
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[DynamicallyAccessedMembers(Constructors)]
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returnJavaArray<T>.CreateValue(refreference,options,targetType,(refJniObjectReferenceh,JniObjectReferenceOptionst)=>newJavaObjectArray<T>(refh,t){
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partialclassArrays{
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[DynamicallyAccessedMembers(JavaObject.ConstructorsAndInterfaces)]
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[DynamicallyAccessedMembers(JavaObject.Constructors)]
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>(
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‎src/Java.Interop/Java.Interop/JavaPrimitiveArrays.cs‎

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[DynamicallyAccessedMembers(Constructors)]
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[DynamicallyAccessedMembers(Constructors)]
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[DynamicallyAccessedMembers(Constructors)]
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[DynamicallyAccessedMembers(Constructors)]
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[DynamicallyAccessedMembers(Constructors)]
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[DynamicallyAccessedMembers(Constructors)]
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[DynamicallyAccessedMembers(Constructors)]
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[DynamicallyAccessedMembers(Constructors)]
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[DynamicallyAccessedMembers(Constructors)]
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[DynamicallyAccessedMembers(Constructors)]
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[DynamicallyAccessedMembers(Constructors)]
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[DynamicallyAccessedMembers(Constructors)]
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[DynamicallyAccessedMembers(Constructors)]
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