Generating methods.txt appears to stop writing to disk and is truncated

[beeradmoore]

Android framework version

net9.0-android

Affected platform version

.NET 9.0.101

Description

While trying to setup monitoring of startup performance of our new MAUI app I wanted to monitor JIT time of our old XF app and our new MAUI app.

While trying to generate methods.txt I am getting odd output. The end of the file appears truncated. When it isn't truncated I am unsure if it is written to disk correctly or if it is truncated at the end of a line.

From the steps below the end of my log looks like

JIT method begin: Microsoft.Maui.Controls.Platform.Compatibility.ShellFlyoutTemplatedContentRenderer:OnFlyoutViewLayoutChanging () elapsed: 1s:270::559345
JIT method done: Microsoft.Maui.Controls.Platform.Compatibility.ShellFlyoutTemplatedContentRenderer:OnFlyoutViewLayoutChanging () elapsed: 1s:270::569033
JIT method begin: Microsoft.Maui.Controls.Platform.Compatibility.ShellFlyoutTemplatedContentRenderer:UpdateFooterLayout () elapsed: 1s:270::636793
JIT method done: Microsoft.Maui.Controls.Platform.Compatibility.ShellFlyoutTemplatedContentRenderer:UpdateFooterLayout () elapsed: 1s:270::647887
JIT method begin: Android.Runtime.JNINativeWrapper:Wrap_JniMarshal_PPLLJ_Z (_JniMarshal_PPLLJ_Z,intptr,intptr,intptr,intptr,long) elapsed: 1s:273::935960
JIT method

Here is the full log,

methods.txt

Steps to Reproduce

1. Create new .NET 9 MAUI application
2. Add android:debuggable="true" to AndroidManifest.xml
3. Update nugets to ensure latest version of MAUI
4. Setup debug.mono.log to be timing as per jit-timers
5. Build, deploy, and run app in release mode (dotnet publish -t:Run -f net9.0-android)
6. Wait about 10 seconds
7. Get methods.txt, adb shell run-as com.companyname.mauiapp10 cat files/.__override__/arm64-v8a/methods.txt > methods.txt
8. Edit file and observe its end

Did you find any workaround?

Nope. Deleting the file adb shell run-as com.companyname.mauiapp10 rm files/.__override__/arm64-v8a/methods.txt and re-running it will sometimes give a different line end.

Relevant log output