[CoreCLR] ANR while running large app

[emmauss]

Android framework version

net10.0-android (Preview), tested on Android 15 and 16

Affected platform version

VS 2026, Net 10.0.100

Description

CoreCLR startup times are longer than Mono. Much much longer that for a very large app with mostly managed code, startup times exceed what the OS allows and thus gets force killed by the OS.
An app that takes 1s to launch on mono can take 6s on coreclr.

Steps to Reproduce

Since reproducing it requires a large app, the best way I can reproduce it is to test it on the Net 10 branch in Avalonia.

1. Clone and checkout this branch Update to .NET 10 AvaloniaUI/Avalonia#19869
2. Build solution. Only the ControlCatalog.Android and SafeAreaDemo.Android projects are relevant, so ignore wasm and ios errors.
3. To reproduce the long launch times, Run SafeAreaDemo.Android project, with mono and then coreclr
4. To reproduce the ANR force close, Run ControlCatalog.Android project with mono and then coreclr

Did you find any workaround?

None for coreclr. Mono and Native AOT work fine.

Relevant log output

This is the ANR log I get in the catlog

  targetThreadTrace is "main" prio=5 tid=1 Native                                                                                                      
| group="main" sCount=1 ucsCount=0 flags=1 obj=0x70401920 self=0xb4000073536b97b0                                                                                                      
| sysTid=29582 nice=-10 cgrp=top-app sched=0/0 handle=0x7581770098                                                                                                      
| state=S schedstat=( 189152588 1629273 48 ) utm=10 stm=8 core=3 HZ=100                                                                                                      
| stack=0x7fe8132000-0x7fe8134000 stackSize=8188KB                                                                                                     
| held mutexes=                                                                                                      
native: #00 pc 00098ae0  /apex/com.android.runtime/lib64/bionic/libc.so (syscall+32) (BuildId: 437b432754eb0831d1399d1f192de9bb)                                                                                                      
native: #01 pc 00073e50  /apex/com.android.runtime/lib64/bionic/libc.so (__futex_wait_ex+148) (BuildId: 437b432754eb0831d1399d1f192de9bb)                                                                                                      
native: #02 pc 00081da8  /apex/com.android.runtime/lib64/bionic/libc.so (pthread_cond_wait+76) (BuildId: 437b432754eb0831d1399d1f192de9bb)                                                                                                      
native: #03 pc 0055cdb4  /data/app/~~XpIht81QQrwvghenuTQwsA==/com.Avalonia.ControlCatalog-OSDo0BnVvWjMOM_FXT4oKQ==/lib/arm64/libcoreclr.so (???) (BuildId: 38bcda41aedbd83f1211cf9f203e2c050cc453ab)                                                                                                      
native: #04 pc 0055cab4  /data/app/~~XpIht81QQrwvghenuTQwsA==/com.Avalonia.ControlCatalog-OSDo0BnVvWjMOM_FXT4oKQ==/lib/arm64/libcoreclr.so (???) (BuildId: 38bcda41aedbd83f1211cf9f203e2c050cc453ab)                                                                                                      
native: #05 pc 0056111c  /data/app/~~XpIht81QQrwvghenuTQwsA==/com.Avalonia.ControlCatalog-OSDo0BnVvWjMOM_FXT4oKQ==/lib/arm64/libcoreclr.so (???) (BuildId: 38bcda41aedbd83f1211cf9f203e2c050cc453ab)                                                                                                      
native: #06 pc 00561338  /data/app/~~XpIht81QQrwvghenuTQwsA==/com.Avalonia.ControlCatalog-OSDo0BnVvWjMOM_FXT4oKQ==/lib/arm64/libcoreclr.so (???) (BuildId: 38bcda41aedbd83f1211cf9f203e2c050cc453ab)                                                                                                      
native: #07 pc 004afb6c  /data/app/~~XpIht81QQrwvghenuTQwsA==/com.Avalonia.ControlCatalog-OSDo0BnVvWjMOM_FXT4oKQ==/lib/arm64/libcoreclr.so (???) (BuildId: 38bcda41aedbd83f1211cf9f203e2c050cc453ab)                                                                                                      
native: #08 pc 001f3704  /data/app/~~XpIht81QQrwvghenuTQwsA==/com.Avalonia.ControlCatalog-OSDo0BnVvWjMOM_FXT4oKQ==/lib/arm64/libcoreclr.so (???) (BuildId: 38bcda41aedbd83f1211cf9f203e2c050cc453ab)                                                                                                      
native: #09 pc 001f3644  /data/app/~~XpIht81QQrwvghenuTQwsA==/com.Avalonia.ControlCatalog-OSDo0BnVvWjMOM_FXT4oKQ==/lib/arm64/libcoreclr.so (???) (BuildId: 38bcda41aedbd83f1211cf9f203e2c050cc453ab)                                                                                                      
native: #10 pc 00531e88  /data/app/~~XpIht81QQrwvghenuTQwsA==/com.Avalonia.ControlCatalog-OSDo0BnVvWjMOM_FXT4oKQ==/lib/arm64/libcoreclr.so (???) (BuildId: 38bcda41aedbd83f1211cf9f203e2c050cc453ab)                                                                                                      
native: #11 pc 005318cc  /data/app/~~XpIht81QQrwvghenuTQwsA==/com.Avalonia.ControlCatalog-OSDo0BnVvWjMOM_FXT4oKQ==/lib/arm64/libcoreclr.so (???) (BuildId: 38bcda41aedbd83f1211cf9f203e2c050cc453ab)                                                                                                      
native: #12 pc 005317e8  /data/app/~~XpIht81QQrwvghenuTQwsA==/com.Avalonia.ControlCatalog-OSDo0BnVvWjMOM_FXT4oKQ==/lib/arm64/libcoreclr.so (???) (BuildId: 38bcda41aedbd83f1211cf9f203e2c050cc453ab)                                                                                                      
native: #13 pc 0032ccb8  /data/app/~~XpIht81QQrwvghenuTQwsA==/com.Avalonia.ControlCatalog-OSDo0BnVvWjMOM_FXT4oKQ==/lib/arm64/libcoreclr.so (???) (BuildId: 38bcda41aedbd83f1211cf9f203e2c050cc453ab)                                                                                                      
native: #14 pc 001c7c58  /data/app/~~XpIht81QQrwvghenuTQwsA==/com.Avalonia.ControlCatalog-OSDo0BnVvWjMOM_FXT4oKQ==/lib/arm64/libcoreclr.so (coreclr_initialize+740) (BuildId: 38bcda41aedbd83f1211cf9f203e2c050cc453ab)                                                                                                      
native: #15 pc 0007434c  /data/app/~~XpIht81QQrwvghenuTQwsA==/com.Avalonia.ControlCatalog-OSDo0BnVvWjMOM_FXT4oKQ==/lib/arm64/libmonodroid.so (xamarin::android::Host::Java_mono_android_Runtime_initInternal+6004) (BuildId: c448cc4351b5815b48776e77cd6e4a56125c22dc)                                                                                                      
at mono.android.Runtime.initInternal(Native method)                                                                                                      
at mono.MonoPackageManager.LoadApplication(MonoPackageManager.java:74)                                                                                                      - locked <@addr=0x2526c20> (a java.lang.Object)                                                                                                      
at mono.MonoRuntimeProvider.attachInfo(MonoRuntimeProvider.java:21)                                                                                                      at android.app.ActivityThread.installProvider(unavailable:349)                                                                                                      
at android.app.ActivityThread.installContentProviders(unavailable:69)                                                                                                      at android.app.ActivityThread.handleBindApplication(unavailable:1211)                           
at android.app.ActivityThread.-$$Nest$mhandleBindApplication(unavailable:0)