feat: Add support for printing skipped AOT methods

doc/runtime-execution-modes.md

@@ -133,6 +133,20 @@ At this time, it is only possible to exclude assemblies from being compiled to W
 ```
 Adding assemblies to this list will exclude them from being compiled to WebAssembly.
 
+### Troubleshooting Mixed AOT/Interpreter Mode
+When using the Mixed AOT/Interpreter mode, it is possible that some methods may not be compiled to 
+WebAssembly for a variety of reasons. This can cause performance issues, as the interpreter is slower 
+than the AOT generated code.
+
+In order to determine which methods are still using the interpreter, you can use the following property:
+```xml
+<PropertyGroup>
+	<WasmShellPrintAOTSkippedMethods>true</WasmShellPrintAOTSkippedMethods>
+</PropertyGroup>
+```
+
+The logs from the AOT compiler can be found in [binlogs generated](https://aka.platform.uno/msbuild-troubleshoot) from the build.
+
 ## Required configuration for AOT, Mixed Mode or external bitcode support compilation on Windows 10
 
 ### Native windows tooling

src/Uno.Wasm.Bootstrap/ShellTask.cs

@@ -167,6 +167,8 @@ namespace Uno.Wasm.Bootstrap
 
 		public bool GenerateAOTProfileDebugList { get; set; } = false;
 
+		public bool PrintAOTSkippedMethods { get; set; } = false;
+
 		public Microsoft.Build.Framework.ITaskItem[]? CompressedExtensions { get; set; }
 
 		public Microsoft.Build.Framework.ITaskItem[]? ExtraEmccFlags { get; set; }
@@ -800,6 +802,7 @@ namespace Uno.Wasm.Bootstrap
 				+ (EnableThreads ? "-threads" : "") + " "
 				+ (EnableSimd ? "-simd" : "") + " "
 				+ (EnableJiterpreter ? "-jiterpreter" : "") + " "
+				+ (PrintAOTSkippedMethods ? "-print-skipped-aot-methods" : "") + " "
 				+ (string.IsNullOrWhiteSpace(RuntimeOptions) ? "" : $"--runtime-options \"{RuntimeOptions}\" ");
 
 			var pthreadPoolSizeParam = $"--pthread-pool-size={PThreadsPoolSize}";

src/Uno.Wasm.Bootstrap/build/Uno.Wasm.Bootstrap.targets

@@ -25,6 +25,7 @@
 		<WasmShellEmccLinkOptimization Condition="'$(WasmShellEmccLinkOptimization)'=='' and '$(Configuration)'=='Release'">true</WasmShellEmccLinkOptimization>
 		<WasmShellEnableThreads Condition="'$(WasmShellEnableThreads)'==''">false</WasmShellEnableThreads>
 		<WasmShellEnableSimd Condition="'$(WasmShellEnableSimd)'==''">true</WasmShellEnableSimd>
+		<WasmShellPrintAOTSkippedMethods Condition="'$(WasmShellPrintAOTSkippedMethods)'==''">false</WasmShellPrintAOTSkippedMethods>
 
 		<!-- 
         Force all applicable references to be present in the ReferenceCopyLocalPaths property.

src/Uno.Wasm.Packager/packager.cs

@@ -444,6 +444,7 @@ class Driver {
 		public bool EnableThreads;
 		public bool EnableJiterpreter;
 		public bool Simd;
+		public bool PrintSkippedAOTMethods;
 		public bool EnableDynamicRuntime;
 		public bool LinkerExcludeDeserialization;
 		public bool EnableCollation;
@@ -483,6 +484,7 @@ class Driver {
 		bool is_netcore = false;
 		bool is_windows = Environment.OSVersion.Platform == PlatformID.Win32NT;
 		bool enable_simd = false;
+		bool print_skipped_aot_methods = false;
 		var il_strip = false;
 		var linker_verbose = false;
 		var runtimeTemplate = "runtime.js";
@@ -589,6 +591,7 @@ class Driver {
 		AddFlag (p, new BoolFlag ("enable-fs", "enable filesystem support (through Emscripten's file_packager.py in a later phase)", opts.EnableFS, b => opts.EnableFS = b));
 		AddFlag (p, new BoolFlag ("threads", "enable threads", opts.EnableThreads, b => opts.EnableThreads = b));
 		AddFlag (p, new BoolFlag ("jiterpreter", "enable jiterpreter", opts.EnableJiterpreter, b => opts.EnableJiterpreter = b));
+		AddFlag (p, new BoolFlag ("print-skipped-aot-methods", "enable jiterpreter", opts.PrintSkippedAOTMethods, b => opts.PrintSkippedAOTMethods = b));
 		AddFlag (p, new BoolFlag ("dedup", "enable dedup pass", opts.EnableDedup, b => opts.EnableDedup = b));
 		AddFlag (p, new BoolFlag ("dynamic-runtime", "enable dynamic runtime (support for Emscripten's dlopen)", opts.EnableDynamicRuntime, b => opts.EnableDynamicRuntime = b));
 		AddFlag (p, new BoolFlag ("simd", "enable SIMD support", opts.Simd, b => opts.Simd = b));
@@ -638,6 +641,7 @@ class Driver {
 		enable_threads = opts.EnableThreads;
 		enable_dynamic_runtime = opts.EnableDynamicRuntime;
 		enable_simd = opts.Simd;
+		print_skipped_aot_methods = opts.PrintSkippedAOTMethods;
 		invariant_globalization = opts.InvariantGlobalization;
 
 		// Dedup is disabled by default https://github.com/dotnet/runtime/issues/48814
@@ -1370,6 +1374,12 @@ class Driver {
 			emcc_flags += "-msimd128 ";
 			emcc_flags += "-DCONFIGURATION_COMPILE_OPTIONS=\"-msimd128\" -DCONFIGURATION_INTERPSIMDTABLES_LIB=\"simd\" ";
 		}
+
+		if (print_skipped_aot_methods)
+		{
+			aot_args += "print-skipped,";
+		}
+
 		if (is_netcore) {
 			emcc_flags += $"-DGEN_PINVOKE -I{src_prefix} ";
 

src/Uno.Wasm.Sample.RayTracer/Uno.Wasm.Sample.RayTracer.csproj

@@ -11,6 +11,7 @@
 		<WasmPWAManifestFile>manifest.json</WasmPWAManifestFile>
 		<!--<WasmShellEnableEmccProfiling>true</WasmShellEnableEmccProfiling>-->
 		<!--<WasmShellGenerateAOTProfile>true</WasmShellGenerateAOTProfile>-->
+		<WasmShellPrintAOTSkippedMethods>true</WasmShellPrintAOTSkippedMethods>
 	</PropertyGroup>
 
 	<Import Project="..\Uno.Wasm.Sample.RayTracer.Shared\Uno.Wasm.Sample.RayTracer.Shared.projitems" Label="Shared" />