[WASM] Profile guided AOT - Failed to clone the Emscripten SDK repository.

[asadullahrifat89]

Current behavior

I followed the official documentation to create an AOT profile to enable profile-guided AOT.

In the Wasm csproj, I added the following:
<WasmShellGenerateAOTProfile>true</WasmShellGenerateAOTProfile>

In the LinkerConfig.xml file, I added the following:
<assembly fullname="WebAssembly.Bindings" />

I pressed Ctrl+F5 to start building.

Then I get the following error:

C:\Users\User\.nuget\packages\uno.wasm.bootstrap\7.0.19\build\Uno.Wasm.Bootstrap.targets(207,3): error : [00:00:00.1270310] Failed to clone the Emscripten SDK repository. Review the error logs for additional information and check https://aka.platform.uno/msbuild-troubleshoot

C:\Users\User\.nuget\packages\uno.wasm.bootstrap\7.0.19\build\Uno.Wasm.Bootstrap.targets(207,3): error : System.Exception: Failed to run emscripten. More details are available in diagnostics logging mode or using the MSBuild /bl switch, see https://aka.platform.uno/msbuild-troubleshoot.

C:\Users\User\.nuget\packages\uno.wasm.bootstrap\7.0.19\build\Uno.Wasm.Bootstrap.targets(207,3): error : at Uno.Wasm.Bootstrap.ShellTask_vfa2b0f7b8718563b261ab09643f013eb7a68a3ba.RunPackager() in D:\a\1\s\src\Uno.Wasm.Bootstrap\ShellTask.cs:line 725

C:\Users\User\.nuget\packages\uno.wasm.bootstrap\7.0.19\build\Uno.Wasm.Bootstrap.targets(207,3): error : at Uno.Wasm.Bootstrap.ShellTask_vfa2b0f7b8718563b261ab09643f013eb7a68a3ba.Execute() in D:\a\1\s\src\Uno.Wasm.Bootstrap\ShellTask.cs:line 257

Expected behavior

The expected behavior would be that the build succeeds and I can save the AOT profile by pressing Alt+Shift+P.

How to reproduce it (as minimally and precisely as possible)

Clone the repo and follow the steps to generate an AOT profile and you will see the errors mentioned.
Link to the repo: https://github.com/asadullahrifat89/honk-trooper-uno-platform

Workaround

NA

Works on UWP/WinUI

NA

Environment

Release

NuGet package version(s)

Uno.Wasm.Bootstrap 7.0.19

Affected platforms

WebAssembly

IDE

Visual Studio 2022

IDE version

17.5.3

Relevant plugins

No response

Anything else we need to know?

Help would be much appreciated.

[jeromelaban]

Thanks for the report. Give a look at the link provided by the error, you will likely see additional information.

[asadullahrifat89]

I have turned on detailed build verbosity and found this:

[00:00:17.3499899] [229/355] [EMCC] corebindings.c -> corebindings.o 2> [00:00:17.3500170] FAILED: corebindings.o 2> [00:00:17.3500206] powershell "$env:PYTHONUTF8=1; emcc -DENABLE_METADATA_UPDATE=1 -s USE_ZLIB=1 -s FORCE_FILESYSTEM=1 -fwasm-exceptions -DGEN_PINVOKE -IC:/Users/User/AppData/Local/Temp/dotnet-runtime-wasm-windows-585dcd7-7db1c333330-4019238418-Release/runtimes/browser-wasm\native -emit-llvm -l idbfs.js -IC:/Users/User/AppData/Local/Temp/dotnet-runtime-wasm-windows-585dcd7-7db1c333330-4019238418-Release/runtimes/browser-wasm/native/include/mono-2.0 -Oz -c -o corebindings.o corebindings.c" 2> [00:00:17.3500222] emcc : The term 'emcc' is not recognized as the name of a cmdlet, function, script file, or operable program. Check 2> [00:00:17.3500237] the spelling of the name, or if a path was included, verify that the path is correct and try again. 2> [00:00:17.3500261] At line:1 char:20 2> [00:00:17.3500274] + $env:PYTHONUTF8=1; emcc -DENABLE_METADATA_UPDATE=1 -s USE_ZLIB=1 -s ... 2> [00:00:17.3500297] + ~~~~ 2> [00:00:17.3500312] + CategoryInfo : ObjectNotFound: (emcc:String) [], CommandNotFoundException 2> [00:00:17.3500326] + FullyQualifiedErrorId : CommandNotFoundException 2> [00:00:17.3500339] 2> [00:00:17.3504274] [230/355] cmd /c set "MONO_PATH=" &&set "MONO_PATH=" && C:/Users/User/AppData/Local/Temp/dotnet-runtime-wasm-windows-585dcd7-7db1c333330-4019238418-Release/runtimes/browser-wasm/native/cross/browser-wasm/mono-aot-cross.exe --print-icall-table > icall-table.json

I have installed the latest version of python from Windows App Store prior to this.

If I run python --version in Power Shell it returns Python 3.10.2

From the above errors this line seems interesting:

The term 'emcc' is not recognized as the name of a cmdlet, function, script file, or operable program.

[jeromelaban]

This is likely caused by a missing component that the bootstrapper did not detect. Try deleting %USERPROFILE%\.uno and try building again. The first binlog may give more information.

[asadullahrifat89]

Deleting the %USERPROFILE%\.uno folder did the trick. I was able to generate an aot.profile. Now pushing to GitHub pages and see if it works. Thanks @jeromelaban

[asadullahrifat89]

This is likely caused by a missing component that the bootstrapper did not detect. Try deleting %USERPROFILE%\.uno and try building again. The first binlog may give more information.

Hey, @jeromelaban This solved my problem. Just checked the build pipelines and it is working like a charm. Thanks for the quick help. Much appreciated.

[premiaware]

I have similar issue using last version on Uno Platform

error : System.Exception: Failed to run emscripten

I have try to set Build Mode = Diagnostic but no additional info is showed.
I have try to delete %USERPROFILE%.uno without success

the error is:
2>C:\Users\premiaware.nuget\packages\uno.wasm.bootstrap\8.0.15\build\Uno.Wasm.Bootstrap.targets(213,3): error : System.Exception: Failed to run emscripten. More details are available in diagnostics logging mode or using the MSBuild /bl switch, see https://aka.platform.uno/msbuild-troubleshoot.
2>C:\Users\premiaware.nuget\packages\uno.wasm.bootstrap\8.0.15\build\Uno.Wasm.Bootstrap.targets(213,3): error : at Uno.Wasm.Bootstrap.ShellTask_v1f66b9b15b66efa87ca84d70b6879ddd12d18414.RunPackager() in //src/Uno.Wasm.Bootstrap/ShellTask.cs:line 768
2>C:\Users\premiaware.nuget\packages\uno.wasm.bootstrap\8.0.15\build\Uno.Wasm.Bootstrap.targets(213,3): error : at Uno.Wasm.Bootstrap.ShellTask_v1f66b9b15b66efa87ca84d70b6879ddd12d18414.Execute() in //src/Uno.Wasm.Bootstrap/ShellTask.cs:line 271

You can help me?

[premiaware]

the issue is this:
uno-bootstrap.js:251 Uncaught (in promise) .NET runtime initialization failed (Error: Assert failed: SharedArrayBuffer is not enabled on this page. Please use a modern browser and set Cross-Origin-Opener-Policy and Cross-Origin-Embedder-Policy http headers. See also https://aka.ms/dotnet-wasm-features)

i have try ti add this in web.config

<system.webServer>

  <httpProtocol>
    <customHeaders>
      <add name="Cross-Origin-Embedder-Policy" value="require-corp"/>
      <add name="Cross-Origin-Opener-Policy" value="same-origin"/>
      <add name="Cross-Origin-Resource-Policy" value="cross-origin"/>
    </customHeaders>
  </httpProtocol>

and this in staticwebapp.config.json

{
  "globalHeaders": {
    "Access-Control-Allow-Origin": "*",
    "Access-Control-Allow-Methods": "GET, POST, PUT, OPTIONS",
    "Cross-Origin-Embedder-Policy": "require-corp",
    "Cross-Origin-Opener-Policy": "same-origin",
    "Cross-Origin-Resource-Policy": "cross-origin"
  },
  "navigationFallback": {

My app is hosted in azure static Web App,
You have idea for fix this issue?

[premiaware]

Does anyone have any ideas how to solve this problem?

[jeromelaban]

Here's an example of app that is deploying using threading: https://github.com/unoplatform/Uno.RayTraceBenchmark/blob/master/CSharp/Uno/RayTraceBenchmark/RayTraceBenchmark/Platforms/WebAssembly/wwwroot/staticwebapp.config.json. Can you compare with your configuration?

[premiaware]

Thank's for support i have try to change my staticwebapp.config.json

staticwebapp.config.json

but the issue is the same, this is the web page
https://reportagente.richiesteimmobili.it/?p=b3f7844f-5e85-48b6-bef3-0815b943387a.1

[jeromelaban]

This configuration is from the documentation, if it does not work for you, there may be something different that is not documented on our side, but we do not know what that could be.

Make sure to review Microsoft's documentation on Azure Static Apps to determine why the headers are not set.

[premiaware]

if i start this command
msbuild ReportAgente.sln /bl

the build terminate with this:

Where i can find the error in the viewer?

[premiaware]

Is very complex to solve this issue:
i have find this information, but i don't Know is it is usefull