SIGABORT in Android NDK in version 3.2.0

[mizunokazumi]

Environment

Sentry SaaS (sentry.io)
UPM: https://github.com/getsentry/unity.git#3.2.2
Unity: 2022.3.24f1
SIGABRT in Android

Steps to Reproduce

1. install sentry-unity 3.2.2
2. install Applovin MAX SDK ("com.applovin.mediation.ads": "8.0.1")
3. build and run

Mandatory conditions:

1. sentry-unity > 3.1.0 (In 3.1.0 everything is fine)
2. Native Android support is enable (NDK integration and sync scope — does not affect and can be in any state)
3. il2cpp (no mono)

Expected Result

no crash

Actual Result

SIGABRT occurred and the application crashed

Any logs or screenshots

Full Error: https://gist.github.com/mizunokazumi/0ff30f4c73d184f0a187a52f435010ce

2025/05/18 22:08:42.362 29729 30637 Fatal om.sample.tes runtime.cc:2585] Thread[112,tid=30637,Native,Thread*=0xb400007dcfc87400,peer=0x1652eef0,"AppLovinSdk:Max-Unity-Plugin:shared"] attempting to detach while still running code
2025/05/18 22:08:42.865 29729 30637 Fatal om.sample.tes runtime.cc:708] Runtime aborting...
2025/05/18 22:08:42.865 29729 30637 Fatal om.sample.tes runtime.cc:708] Dumping all threads without mutator lock held
2025/05/18 22:08:42.865 29729 30637 Fatal om.sample.tes runtime.cc:708] All threads:
2025/05/18 22:08:42.865 29729 30637 Fatal om.sample.tes runtime.cc:708] DALVIK THREADS (115):
2025/05/18 22:08:42.865 29729 30637 Fatal om.sample.tes runtime.cc:708] "main" prio=10 tid=1 Native
2025/05/18 22:08:42.865 29729 30637 Fatal om.sample.tes runtime.cc:708]   | group="" sCount=1 ucsCount=0 flags=1 obj=0x71ebbeb0 self=0xb400007eee501800
2025/05/18 22:08:42.865 29729 30637 Fatal om.sample.tes runtime.cc:708]   | sysTid=29729 nice=-10 cgrp=default sched=0/0 handle=0x7eefade4f8
2025/05/18 22:08:42.865 29729 30637 Fatal om.sample.tes runtime.cc:708]   | state=S schedstat=( 1232492799 257392494 1293 ) utm=105 stm=17 core=2 HZ=100
2025/05/18 22:08:42.865 29729 30637 Fatal om.sample.tes runtime.cc:708]   | stack=0x7fcd84f000-0x7fcd851000 stackSize=8188KB
2025/05/18 22:08:42.865 29729 30637 Fatal om.sample.tes runtime.cc:708]   | held mutexes=
2025/05/18 22:08:42.865 29729 30637 Fatal om.sample.tes runtime.cc:708]   native: #00 pc 00086f90  /apex/com.android.runtime/lib64/bionic/libc.so (syscall+32) (BuildId: 94065bf91428f6ae9fb310c478171302)
2025/05/18 22:08:42.865 29729 30637 Fatal om.sample.tes runtime.cc:708]   native: #01 pc 0022a29c  /apex/com.android.art/lib64/libart.so (art::ConditionVariable::WaitHoldingLocks+136) (BuildId: a0856b3dbc826e8cee9d66738ac739d8)
2025/05/18 22:08:42.865 29729 30637 Fatal om.sample.tes runtime.cc:708]   native: #02 pc 00993d48  /apex/com.android.art/lib64/libart.so (artJniMethodEnd+344) (BuildId: a0856b3dbc826e8cee9d66738ac739d8)
2025/05/18 22:08:42.865 29729 30637 Fatal om.sample.tes runtime.cc:708]   native: #03 pc 007865bc  /apex/com.android.art/lib64/libart.so (art_jni_method_end+12) (BuildId: a0856b3dbc826e8cee9d66738ac739d8)
2025/05/18 22:08:42.865 29729 30637 Fatal om.sample.tes runtime.cc:708]   native: #04 pc 0210e728  /memfd:jit-cache (deleted) (offset 2000000) (art_jni_trampoline+280)
2025/05/18 22:08:42.865 29729 30637 Fatal om.sample.tes runtime.cc:708]   native: #05 pc 0207cdc4  /memfd:jit-cache (deleted) (offset 2000000) (android.os.MessageQueue.next+356)
2025/05/18 22:08:42.865 29729 30637 Fatal om.sample.tes runtime.cc:708]   native: #06 pc 0207c04c  /memfd:jit-cache (deleted) (offset 2000000) (android.os.Looper.loopOnce+172)
2025/05/18 22:08:42.865 29729 30637 Fatal om.sample.tes runtime.cc:708]   native: #07 pc 00368a40  /apex/com.android.art/lib64/libart.so (art_quick_invoke_static_stub+640) (BuildId: a0856b3dbc826e8cee9d66738ac739d8)
2025/05/18 22:08:42.865 29729 30637 Fatal om.sample.tes runtime.cc:708]   native: #08 pc 00361e5c  /apex/com.android.art/lib64/libart.so (bool art::interpreter::DoCall<false>+2048) (BuildId: a0856b3dbc826e8cee9d66738ac739d8)
2025/05/18 22:08:42.865 29729 30637 Fatal om.sample.tes runtime.cc:708]   native: #09 pc 0076f734  /apex/com.android.art/lib64/libart.so (void art::interpreter::ExecuteSwitchImplCpp<false>+12208) (BuildId: a0856b3dbc826e8cee9d66738ac739d8)
2025/05/18 22:08:42.865 29729 30637 Fatal om.sample.tes runtime.cc:708]   native: #10 pc 003815d8  /apex/com.android.art/lib64/libart.so (ExecuteSwitchImplAsm+8) (BuildId: a0856b3dbc826e8cee9d66738ac739d8)
2025/05/18 22:08:42.865 29729 30637 Fatal om.sample.tes runtime.cc:708]   native: #11 pc 004594e4  /system/framework/framework.jar (android.os.Looper.loop)
2025/05/18 22:08:42.865 29729 30637 Fatal om.sample.tes runtime.cc:708]   native: #12 pc 00354250  /apex/com.android.art/lib64/libart.so (art::interpreter::Execute +428) (BuildId: a0856b3dbc826e8cee9d66738ac739d8)
2025/05/18 22:08:42.865 29729 30637 Fatal om.sample.tes runtime.cc:708]   native: #13 pc 00362678  /apex/com.android.art/lib64/libart.so (bool art::interpreter::DoCall<false>+4124) (BuildId: a0856b3dbc826e8cee9d66738ac739d8)
2025/05/18 22:08:42.865 29729 30637 Fatal om.sample.tes runtime.cc:708]   native: #14 pc 0076f734  /apex/com.android.art/lib64/libart.so (void art::interpreter::ExecuteSwitchImplCpp<false>+12208) (BuildId: a0856b3dbc826e8cee9d66738ac739d8)
2025/05/18 22:08:42.865 29729 30637 Fatal om.sample.tes runtime.cc:708]   native: #15 pc 003815d8  /apex/com.android.art/lib64/libart.so (ExecuteSwitchImplAsm+8) (BuildId: a0856b3dbc826e8cee9d66738ac739d8)
2025/05/18 22:08:42.865 29729 30637 Fatal om.sample.tes runtime.cc:708]   native: #16 pc 001ca8a0  /system/framework/framework.jar (android.app.ActivityThread.main)
2025/05/18 22:08:42.865 29729 30637 Fatal om.sample.tes runtime.cc:708]   native: #17 pc 003535dc  /apex/com.android.art/lib64/libart.so (artQuickToInterpreterBridge+1932) (BuildId: a0856b3dbc826e8cee9d66738ac739d8)
2025/05/18 22:08:42.865 29729 30637 Fatal om.sample.tes runtime.cc:708]   native: #18 pc 0037f098  /apex/com.android.art/lib64/libart.so (art_quick_to_interpreter_bridge+88) (BuildId: a0856b3dbc826e8cee9d66738ac739d8)
2025/05/18 22:08:42.865 29729 30637 Fatal om.sample.tes runtime.cc:708]   native: #19 pc 00368a40  /apex/com.android.art/lib64/libart.so (art_quick_invoke_static_stub+640) (BuildId: a0856b3dbc826e8cee9d66738ac739d8)
2025/05/18 22:08:42.865 29729 30637 Fatal om.sample.tes runtime.cc:708]   native: #20 pc 003644f4  /apex/com.android.art/lib64/libart.so (_jobject* art::InvokeMethod<8>+732) (BuildId: a0856b3dbc826e8cee9d66738ac739d8)
2025/05/18 22:08:42.865 29729 30637 Fatal om.sample.tes runtime.cc:708]   native: #21 pc 006c8834  /apex/com.android.art/lib64/libart.so (art::Method_invoke +32) (BuildId: a0856b3dbc826e8cee9d66738ac739d8)
2025/05/18 22:08:42.865 29729 30637 Fatal om.sample.tes runtime.cc:708]   native: #22 pc 0037ef70  /apex/com.android.art/lib64/libart.so (art_quick_generic_jni_trampoline+144) (BuildId: a0856b3dbc826e8cee9d66738ac739d8)
2025/05/18 22:08:42.865 29729 30637 Fatal om.sample.tes runtime.cc:708]   native: #23 pc 00368774  /apex/com.android.art/lib64/libart.so (art_quick_invoke_stub+612) (BuildId: a0856b3dbc826e8cee9d66738ac739d8)
2025/05/18 22:08:42.865 29729 30637 Fatal om.sample.tes runtime.cc:708]   native: #24 pc 00361de4  /apex/com.android.art/lib64/libart.so (bool art::interpreter::DoCall<false>+1928) (BuildId: a0856b3dbc826e8cee9d66738ac739d8)
2025/05/18 22:08:42.865 29729 30637 Fatal om.sample.tes runtime.cc:708]   native: #25 pc 0076f734  /apex/com.android.art/lib64/libart.so (void art::interpreter::ExecuteSwitchImplCpp<false>+12208) (BuildId: a0856b3dbc826e8cee9d66738ac739d8)
2025/05/18 22:08:42.865 29729 30637 Fatal om.sample.tes runtime.cc:708]   native: #26 pc 003815d8  /apex/com.android.art/lib64/libart.so (ExecuteSwitchImplAsm+8) (BuildId: a0856b3dbc826e8cee9d66738ac739d8)
2025/05/18 22:08:42.865 29729 30637 Fatal om.sample.tes runtime.cc:708]   native: #27 pc 0024dd90  /system/framework/framework.jar (com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run)
2025/05/18 22:08:42.865 29729 30637 Fatal om.sample.tes runtime.cc:708]   native: #28 pc 003535dc  /apex/com.android.art/lib64/libart.so (artQuickToInterpreterBridge+1932) (BuildId: a0856b3dbc826e8cee9d66738ac739d8)
2025/05/18 22:08:42.865 29729 30637 Fatal om.sample.tes runtime.cc:708]   native: #29 pc 0037f098  /apex/com.android.art/lib64/libart.so (art_quick_to_interpreter_bridge+88) (BuildId: a0856b3dbc826e8cee9d66738ac739d8)
2025/05/18 22:08:42.865 29729 30637 Fatal om.sample.tes runtime.cc:708]   at android.os.MessageQueue.nativePollOnce(Native method)
2025/05/18 22:08:42.865 29729 30637 Fatal om.sample.tes runtime.cc:708]   at android.os.MessageQueue.next(MessageQueue.java:337)
2025/05/18 22:08:42.865 29729 30637 Fatal om.sample.tes runtime.cc:708]   at android.os.Looper.loopOnce(Looper.java:168)
2025/05/18 22:08:42.865 29729 30637 Fatal om.sample.tes runtime.cc:708]   at android.os.Looper.loop(Looper.java:299)
2025/05/18 22:08:42.865 29729 30637 Fatal om.sample.tes runtime.cc:708]   at android.app.ActivityThread.main(ActivityThread.java:8250)
2025/05/18 22:08:42.865 29729 30637 Fatal om.sample.tes runtime.cc:708]   at java.lang.reflect.Method.invoke(Native method)
2025/05/18 22:08:42.865 29729 30637 Fatal om.sample.tes runtime.cc:708]   at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:556)
2025/05/18 22:08:42.865 29729 30637 Fatal om.sample.tes runtime.cc:708]   at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1045)
2025/05/18 22:08:42.865 29729 30637 Fatal om.sample.tes runtime.cc:708] 
2025/05/18 22:08:42.865 29729 30637 Fatal om.sample.tes runtime.cc:708] "ReferenceQueueDaemon" prio=5 tid=7 Waiting
2025/05/18 22:08:42.865 29729 30637 Fatal om.sample.tes runtime.cc:708]   | group="" sCount=1 ucsCount=0 flags=1 obj=0x140dbfa8 self=0xb400007e210b1c00
2025/05/18 22:08:42.865 29729 30637 Fatal om.sample.tes runtime.cc:708]   | sysTid=29745 nice=4 cgrp=default sched=0/0 handle=0x7e31c88cb0
2025/05/18 22:08:42.865 29729 30637 Fatal om.sample.tes runtime.cc:708]   | state=S schedstat=( 811977 433959 10 ) utm=0 stm=0 core=6 HZ=100
2025/05/18 22:08:42.865 29729 30637 Fatal om.sample.tes runtime.cc:708]   | stack=0x7e31b85000-0x7e31b87000 stackSize=1039KB
2025/05/18 22:08:42.865 29729 30637 Fatal om.sample.tes runtime.cc:708]   | held mutexes=
2025/05/18 22:08:42.865 29729 30637 Fatal om.sample.tes runtime.cc:708]   native: #00 pc 00086f90  /apex/com.android.runtime/lib64/bionic/libc.so (syscall+32) (BuildId: 94065bf91428f6ae9fb310c478171302)
2025/05/18 22:08:42.865 29729 30637 Fatal om.sample.tes runtime.cc:708]   native: #01 pc 0022a29c  /apex/com.android.art/lib64/libart.so (art::ConditionVariable::WaitHoldingLocks+136) (BuildId: a0856b3dbc826e8cee9d66738ac739d8)
2025/05/18 22:08:42.865 29729 30637 Fatal om.sample.tes runtime.cc:708]   native: #02 pc 004244dc  /apex/com.android.art/lib64/libart.so (art::Monitor::Wait+7244) (BuildId: a0856b3dbc826e8cee9d66738ac739d8)
2025/05/18 22:08:42.865 29729 30637 Fatal om.sample.tes runtime.cc:708]   native: #03 pc 0037ef70  /apex/com.android.art/lib64/libart.so (art_quick_generic_jni_trampoline+144) (BuildId: a0856b3dbc826e8cee9d66738ac739d8)
2025/05/18 22:08:42.865 29729 30637 Fatal om.sample.tes runtime.cc:708]   native: #04 pc 00368774  /apex/com.android.art/lib64/libart.so (art_quick_invoke_stub+612) (BuildId: a0856b3dbc826e8cee9d66738ac739d8)
2025/05/18 22:08:42.865 29729 30637 Fatal om.sample.tes runtime.cc:708]   native: #05 pc 00361de4  /apex/com.android.art/lib64/libart.so (bool art::interpreter::DoCall<false>+1928) (BuildId: a0856b3dbc826e8cee9d66738ac739d8)
2025/05/18 22:08:42.865 29729 30637 Fatal om.sample.tes runtime.cc:708]   native: #06 pc 0076f734  /apex/com.android.art/lib64/libart.so (void art::interpreter::ExecuteSwitchImplCpp<false>+12208) (BuildId: a0856b3dbc826e8cee9d66738ac739d8)
2025/05/18 22:08:42.865 29729 30637 Fatal om.sample.tes runtime.cc:708]   native: #07 pc 003815d8  /apex/com.android.art/lib64/libart.so (ExecuteSwitchImplAsm+8) (BuildId: a0856b3dbc826e8cee9d66738ac739d8)
2025/05/18 22:08:42.865 29729 30637 Fatal om.sample.tes runtime.cc:708]   native: #08 pc 00106710  /apex/com.android.art/javalib/core-oj.jar (java.lang.Object.wait)

[bitsandfoxes]

Thanks for reaching out and sorry to see you run into issues.

This looks like it's related to the changes made in #2107.
From what I can tell the right now it looks to me like

1. The AppLovin SDK is doing something that triggers a scope sync between the Unity and the Java SDK.
2. This ends up in SentryJava where we try to detach from the thread if it's not the MainThread

   sentry-unity/src/Sentry.Unity.Android/SentryJava.cs

   Lines 433 to 440 in b4e1b9d

   	internal void HandleJniThreadAttachment(bool? isMainThread = null)
   	{
   	isMainThread ??= MainThreadData.IsMainThread();
   	if (isMainThread is false)
   	{
   	_androidJNI.AttachCurrentThread();
   	}
   	}

3. The IsMainThread-Check seems to fail

   sentry-unity/src/Sentry.Unity/MainThreadData.cs

   Lines 72 to 73 in b4e1b9d

   	public static bool IsMainThread()
   	=> MainThreadId.HasValue && Thread.CurrentThread.ManagedThreadId == MainThreadId;

4. This causes the attempting to detach while still running code error and message

I'm trying to repro this locally and find a fix for this ASAP.

[bitsandfoxes]

Since this looks like a sample app, could you share this with us?

[bitsandfoxes]

@mizunokazumi I'm having a really tough time reproducing this locally. Could you help me out and give this local build a try?

[mizunokazumi]

This is not actually a sample app, but a larger product (productId is just replaced just in case). I will extract the minimal code from it that reproduces the problem and share it this week