GC Bridge in NativeAOT is flakey

[jonpryor]

Android framework version

net10.0-android (Preview)

Affected platform version

.NET 10 RC2

Description

The Java GC Bridge under NativeAOT is flakey, which may result in apps crashing.

(Shock, a nearly unmentionable preview feature is flakey! Where are my smelling salts?)

Steps to Reproduce

This was observed with the unoplatform/uno.chefs sample app, built for NativeAOT:

git clone https://github.com/unoplatform/uno.chefs.git
git checkout f8c5943efa4eb702a066d09c6e3ef389ade3b973
cat >patch <<EOF
diff --git a/global.json b/global.json
index 7f65a2cc..d6120d9e 100644
--- a/global.json
+++ b/global.json
@@ -1,8 +1,8 @@
 {
   "msbuild-sdks": {
-    "Uno.Sdk": "6.3.28"
+    "Uno.Sdk": "6.4.0-dev.57"
   },
   "sdk": {
-    "allowPrerelease": false
+    "allowPrerelease": true
   }
 }
EOF
git apply < patch

dotnet publish -c Release -f net10.0-android -r android-x64 -p:TargetFrameworkOverride=net10.0-android \
  -p:PublishAot=true -p:UseSkiaRendering=false \
  -p:AndroidPackageFormat=apk -bl Chefs/Chefs.csproj

adb install Chefs/bin/Release/net10.0-android/android-x64/publish/uno.platform.chefs.skia-Signed.apk

Get your adb logcat log going:

adb logcat > log.txt &
less log.txt

Then repeat the following commands in a loop until you see it crash:

adb shell am start uno.platform.chefs.skia/crc6413a18e1a0e43bcb3.MainActivity
# wait ~10 seconds
adb shell am force-stop uno.platform.chefs.skia

When I have observed the crash, no app interaction was required. In limited testing, crash happened one in 5-10 app runs.

Did you find any workaround?

NativeAOT is not even Preview! (Who knew?)

Don't use NativeAOT in a production capacity.

Relevant log output

W form.chefs.ski: Unexpected CPU variant for X86 using defaults: x86_64
E form.chefs.ski: Not starting debugger since process cannot load the jdwp agent.
D NativeAotRuntimeProvider: NativeAotRuntimeProvider()
D NativeAotRuntimeProvider: NativeAotRuntimeProvider.attachInfo(): calling JavaInteropRuntime.init()…
D JavaInteropRuntime: Loading Chefs.so...
I JavaInteropRuntime: JNI_OnLoad()
D DOTNET  : AndroidCryptoNative_InitLibraryOnLoad: jint AndroidCryptoNative_InitLibraryOnLoad(JavaVM *, void *) in /__w/1/s/src/runtime/src/native/libs/System.Security.Cryptography.Native.Android/pal_jni.c
I DOTNET  : GetOptionalMethod: optional method setApplicationProtocols ([Ljava/lang/String;)V was not found
D DOTNET  : GetOptionalClassGRef: optional class com/android/org/conscrypt/OpenSSLEngineImpl was not found
I DOTNET  : GetOptionalMethod: optional method getApplicationProtocol ()Ljava/lang/String; was not found
D NativeAotRuntimeProvider: NativeAotRuntimeProvider.onCreate()
D AppCompatDelegate: Checking for metadata for AppLocalesMetadataHolderService : Service not found
D OpenGLRenderer: Skia GL Pipeline
F form.chefs.ski: indirect_reference_table.cc:59] JNI ERROR (app bug): accessed deleted Global 0x367a
F form.chefs.ski: runtime.cc:558] Runtime aborting...
F form.chefs.ski: runtime.cc:558] Dumping all threads without appropriate locks held: thread list lock
F form.chefs.ski: runtime.cc:558] All threads:
F form.chefs.ski: runtime.cc:558] DALVIK THREADS (21):
F form.chefs.ski: runtime.cc:558] "main" prio=10 tid=1 Runnable
F form.chefs.ski: runtime.cc:558]   | group="" sCount=0 dsCount=0 flags=2 obj=0x75c45a48 self=0x717b96c14c00
F form.chefs.ski: runtime.cc:558]   | sysTid=5947 nice=-10 cgrp=default sched=0/0 handle=0x717c1c452548
F form.chefs.ski: runtime.cc:558]   | state=R schedstat=( 683883508 100769853 782 ) utm=59 stm=9 core=0 HZ=100
F form.chefs.ski: runtime.cc:558]   | stack=0x7ffe6ddbd000-0x7ffe6ddbf000 stackSize=8MB
F form.chefs.ski: runtime.cc:558]   | held mutexes= "abort lock" "mutator lock"(shared held)
F form.chefs.ski: runtime.cc:558]   native: #00 pc 0000000000403e33  /system/lib64/libart.so (art::DumpNativeStack(std::__1::basic_ostream<char, std::__1::char_traits<char>>&, int, BacktraceMap*, char const*, art::ArtMethod*, void*, bool)+227)
F form.chefs.ski: runtime.cc:558]   native: #01 pc 00000000004ee1f7  /system/lib64/libart.so (art::Thread::DumpStack(std::__1::basic_ostream<char, std::__1::char_traits<char>>&, bool, BacktraceMap*, bool) const+343)
F form.chefs.ski: runtime.cc:558]   native: #02 pc 0000000000509d8e  /system/lib64/libart.so (art::DumpCheckpoint::Run(art::Thread*)+846)
F form.chefs.ski: runtime.cc:558]   native: #03 pc 00000000005020f9  /system/lib64/libart.so (art::ThreadList::RunCheckpoint(art::Closure*, art::Closure*)+489)
F form.chefs.ski: runtime.cc:558]   native: #04 pc 00000000005012c4  /system/lib64/libart.so (art::ThreadList::Dump(std::__1::basic_ostream<char, std::__1::char_traits<char>>&, bool)+580)
F form.chefs.ski: runtime.cc:558]   native: #05 pc 00000000004bf6ea  /system/lib64/libart.so (art::Runtime::Abort(char const*)+282)
F form.chefs.ski: runtime.cc:558]   native: #06 pc 0000000000008cdc  /system/lib64/libbase.so (android::base::LogMessage::~LogMessage()+716)
F form.chefs.ski: runtime.cc:558]   native: #07 pc 000000000025b863  /system/lib64/libart.so (art::IndirectReferenceTable::AbortIfNoCheckJNI(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char>> const&)+243)
F form.chefs.ski: runtime.cc:558]   native: #08 pc 00000000003252f2  /system/lib64/libart.so (art::IndirectReferenceTable::GetChecked(void*) const+466)
F form.chefs.ski: runtime.cc:558]   native: #09 pc 000000000031fc32  /system/lib64/libart.so (art::JavaVMExt::DecodeGlobal(void*)+18)
F form.chefs.ski: runtime.cc:558]   native: #10 pc 00000000004f41c5  /system/lib64/libart.so (art::Thread::DecodeJObject(_jobject*) const+165)
F form.chefs.ski: runtime.cc:558]   native: #11 pc 00000000003c507f  /system/lib64/libart.so (_ZN3art3JNI23DecodeAndCheckArrayTypeIP12_jfloatArrayfNS_6mirror14PrimitiveArrayIfEEEEPT1_RNS_18ScopedObjectAccessET_PKcSD_+47)
F form.chefs.ski: runtime.cc:558]   native: #12 pc 00000000003b9640  /system/lib64/libart.so (art::JNI::GetFloatArrayRegion(_JNIEnv*, _jfloatArray*, int, int, float*)+800)
F form.chefs.ski: runtime.cc:558]   native: #13 pc 0000000003332767  /data/app/uno.platform.chefs.skia-Hn38_Q2Ao0LTHQhJNMH6_A==/lib/x86_64/libChefs.so (offset 2f06000) (???)
F form.chefs.ski: runtime.cc:558]   native: #14 pc 0000000003abde5c  /data/app/uno.platform.chefs.skia-Hn38_Q2Ao0LTHQhJNMH6_A==/lib/x86_64/libChefs.so (offset 2f06000) (???)
F form.chefs.ski: runtime.cc:558]   native: #15 pc 00000000000147f7  <anonymous:71798f400000> (???)
F form.chefs.ski: runtime.cc:558]   at crc64fe881b1858fb9a5d.SimpleOrientationSensor_OrientationListener.n_onSensorChanged(Native method)
F form.chefs.ski: runtime.cc:558]   at crc64fe881b1858fb9a5d.SimpleOrientationSensor_OrientationListener.onSensorChanged(SimpleOrientationSensor_OrientationListener.java:37)
F form.chefs.ski: runtime.cc:558]   at android.hardware.SystemSensorManager$SensorEventQueue.dispatchSensorEvent(SystemSensorManager.java:833)
F form.chefs.ski: runtime.cc:558]   at android.os.MessageQueue.nativePollOnce(Native method)
F form.chefs.ski: runtime.cc:558]   at android.os.MessageQueue.next(MessageQueue.java:326)
F form.chefs.ski: runtime.cc:558]   at android.os.Looper.loop(Looper.java:160)
F form.chefs.ski: runtime.cc:558]   at android.app.ActivityThread.main(ActivityThread.java:6669)
F form.chefs.ski: runtime.cc:558]   at java.lang.reflect.Method.invoke(Native method)
F form.chefs.ski: runtime.cc:558]   at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493)
F form.chefs.ski: runtime.cc:558]   at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858)
F form.chefs.ski: runtime.cc:558] 
F form.chefs.ski: runtime.cc:558] "Jit thread pool worker thread 0" prio=10 tid=2 Native
F form.chefs.ski: runtime.cc:558]   | group="" sCount=1 dsCount=0 flags=1 obj=0x12cc0300 self=0x717b9080e000
F form.chefs.ski: runtime.cc:558]   | sysTid=5950 nice=9 cgrp=default sched=0/0 handle=0x717b90b274f0
F form.chefs.ski: runtime.cc:558]   | state=S schedstat=( 3308423 2428535 10 ) utm=0 stm=0 core=1 HZ=100
F form.chefs.ski: runtime.cc:558]   | stack=0x717b90a29000-0x717b90a2b000 stackSize=1021KB
F form.chefs.ski: runtime.cc:558]   | held mutexes=
F form.chefs.ski: runtime.cc:558]   kernel: (couldn't read /proc/self/task/5950/stack)
F form.chefs.ski: runtime.cc:558]   native: #00 pc 0000000000026b96  /system/lib64/libc.so (syscall+22)
F form.chefs.ski: runtime.cc:558]   native: #01 pc 00000000000d70bc  /system/lib64/libart.so (art::ConditionVariable::WaitHoldingLocks(art::Thread*)+108)
F form.chefs.ski: runtime.cc:558]   native: #02 pc 000000000050b82c  /system/lib64/libart.so (art::ThreadPool::GetTask(art::Thread*)+316)
F form.chefs.ski: runtime.cc:558]   native: #03 pc 000000000050ac11  /system/lib64/libart.so (art::ThreadPoolWorker::Run()+97)
F form.chefs.ski: runtime.cc:558]   native: #04 pc 000000000050a6a3  /system/lib64/libart.so (art::ThreadPoolWorker::Callback(void*)+131)
F form.chefs.ski: runtime.cc:558]   native: #05 pc 0000000000092bab  /system/lib64/libc.so (__pthread_start(void*)+27)
F form.chefs.ski: runtime.cc:558]   native: #06 pc 000000000002af2d  /system/lib64/libc.so (__start_thread+61)
F form.chefs.ski: runtime.cc:558]   (no managed stack frames)
F form.chefs.ski: runtime.cc:558] 
F form.chefs.ski: runtime.cc:558] "Signal Catcher" prio=10 tid=3 WaitingInMainSignalCatcherLoop
F form.chefs.ski: runtime.cc:558]   | group="" sCount=1 dsCount=0 flags=1 obj=0x12cc0388 self=0x717b96c16400
F form.chefs.ski: runtime.cc:558]   | sysTid=5953 nice=0 cgrp=default sched=0/0 handle=0x717b907ff4f0
F form.chefs.ski: runtime.cc:558]   | state=S schedstat=( 248746 523019 2 ) utm=0 stm=0 core=0 HZ=100
F form.chefs.ski: runtime.cc:558]   | stack=0x717b90704000-0x717b90706000 stackSize=1009KB
F form.chefs.ski: runtime.cc:558]   | held mutexes=
F form.chefs.ski: runtime.cc:558]   kernel: (couldn't read /proc/self/task/5953/stack)
F form.chefs.ski: runtime.cc:558]   native: #00 pc 000000000007e45a  /system/lib64/libc.so (__rt_sigtimedwait+10)
F form.chefs.ski: runtime.cc:558]   native: #01 pc 0000000000035622  /system/lib64/libc.so (sigwait+66)
F form.chefs.ski: runtime.cc:558]   native: #02 pc 00000000004dab1a  /system/lib64/libart.so (art::SignalCatcher::WaitForSignal(art::Thread*, art::SignalSet&)+250)
F form.chefs.ski: runtime.cc:558]   native: #03 pc 00000000004d9377  /system/lib64/libart.so (art::SignalCatcher::Run(void*)+279)
F form.chefs.ski: runtime.cc:558]   native: #04 pc 0000000000092bab  /system/lib64/libc.so (__pthread_start(void*)+27)
F form.chefs.ski: runtime.cc:558]   native: #05 pc 000000000002af2d  /system/lib64/libc.so (__start_thread+61)
F form.chefs.ski: runtime.cc:558]   (no managed stack frames)
F form.chefs.ski: runtime.cc:558] 
F form.chefs.ski: runtime.cc:558] "FinalizerDaemon" prio=10 tid=4 Waiting
F form.chefs.ski: runtime.cc:558]   | group="" sCount=1 dsCount=0 flags=1 obj=0x12cc0410 self=0x717b96dc0c00
F form.chefs.ski: runtime.cc:558]   | sysTid=5955 nice=4 cgrp=default sched=0/0 handle=0x717b82ce04f0
F form.chefs.ski: runtime.cc:558]   | state=S schedstat=( 2950721 1635705 15 ) utm=0 stm=0 core=1 HZ=100
F form.chefs.ski: runtime.cc:558]   | stack=0x717b82bdd000-0x717b82bdf000 stackSize=1041KB
F form.chefs.ski: runtime.cc:558]   | held mutexes=
F form.chefs.ski: runtime.cc:558]   kernel: (couldn't read /proc/self/task/5955/stack)
F form.chefs.ski: runtime.cc:558]   native: #00 pc 0000000000026b96  /system/lib64/libc.so (syscall+22)
F form.chefs.ski: runtime.cc:558]   native: #01 pc 00000000000d70bc  /system/lib64/libart.so (art::ConditionVariable::WaitHoldingLocks(art::Thread*)+108)
F form.chefs.ski: runtime.cc:558]   native: #02 pc 00000000003ff20f  /system/lib64/libart.so (art::Monitor::Wait(art::Thread*, long, int, bool, art::ThreadState)+655)
F form.chefs.ski: runtime.cc:558]   native: #03 pc 0000000000400db1  /system/lib64/libart.so (art::Monitor::Wait(art::Thread*, art::mirror::Object*, long, int, bool, art::ThreadState)+449)
F form.chefs.ski: runtime.cc:558]   at java.lang.Object.wait(Native method)
F form.chefs.ski: runtime.cc:558]   - waiting on <0x0b94c8fe> (a java.lang.Object)
F form.chefs.ski: runtime.cc:558]   at java.lang.Object.wait(Object.java:422)
F form.chefs.ski: runtime.cc:558]   at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:188)
F form.chefs.ski: runtime.cc:558]   - locked <0x0b94c8fe> (a java.lang.Object)
F form.chefs.ski: runtime.cc:558]   at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:209)
F form.chefs.ski: runtime.cc:558]   at java.lang.Daemons$FinalizerDaemon.runInternal(Daemons.java:232)
F form.chefs.ski: runtime.cc:558]   at java.lang.Daemons$Daemon.run(Daemons.java:103)
F form.chefs.ski: runtime.cc:558]   at java.lang.Thread.run(Thread.java:764)
F form.chefs.ski: runtime.cc:558] 
F form.chefs.ski: runtime.cc:558] "ReferenceQueueDaemon" prio=10 tid=5 Waiting
F form.chefs.ski: runtime.cc:558]   | group="" sCount=1 dsCount=0 flags=1 obj=0x12cc0498 self=0x717b96dc0000
F form.chefs.ski: runtime.cc:558]   | sysTid=5954 nice=4 cgrp=default sched=0/0 handle=0x717b82de64f0
F form.chefs.ski: runtime.cc:558]   | state=S schedstat=( 2633205 1295966 15 ) utm=0 stm=0 core=0 HZ=100
F form.chefs.ski: runtime.cc:558]   | stack=0x717b82ce3000-0x717b82ce5000 stackSize=1041KB
F form.chefs.ski: runtime.cc:558]   | held mutexes=
F form.chefs.ski: runtime.cc:558]   kernel: (couldn't read /proc/self/task/5954/stack)
F form.chefs.ski: runtime.cc:558]   native: #00 pc 0000000000026b96  /system/lib64/libc.so (syscall+22)
F form.chefs.ski: runtime.cc:558]   native: #01 pc 00000000000d70bc  /system/lib64/libart.so (art::ConditionVariable::WaitHoldingLocks(art::Thread*)+108)
F form.chefs.ski: runtime.cc:558]   native: #02 pc 00000000003ff20f  /system/lib64/libart.so (art::Monitor::Wait(art::Thread*, long, int, bool, art::ThreadState)+655)
F form.chefs.ski: runtime.cc:558]   native: #03 pc 0000000000400db1  /system/lib64/libart.so (art::Monitor::Wait(art::Thread*, art::mirror::Object*, long, int, bool, art::ThreadState)+449)
F form.chefs.ski: runtime.cc:558]   at java.lang.Object.wait(Native method)
F form.chefs.ski: runtime.cc:558]   - waiting on <0x060b285f> (a java.lang.Class<java.lang.ref.ReferenceQueue>)
F form.chefs.ski: runtime.cc:558]   at java.lang.Daemons$ReferenceQueueDaemon.runInternal(Daemons.java:178)
F form.chefs.ski: runtime.cc:558]   - locked <0x060b285f> (a java.lang.Class<java.lang.ref.ReferenceQueue>)
F form.chefs.ski: runtime.cc:558]   at java.lang.Daemons$Daemon.run(Daemons.java:103)
F form.chefs.ski: runtime.cc:558]   at java.lang.Thread.run(Thread.java:764)
F form.chefs.ski: runtime.cc:558] 
F form.chefs.ski: runtime.cc:558] "FinalizerWatchdogDaemon" prio=10 tid=6 Sleeping
F form.chefs.ski: runtime.cc:558]   | group="" sCount=1 dsCount=0 flags=1 obj=0x12cc0520 self=0x717b8efc6000
F form.chefs.ski: runtime.cc:558]   | sysTid=5956 nice=4 cgrp=default sched=0/0 handle=0x717b82bda4f0
F form.chefs.ski: runtime.cc:558]   | state=S schedstat=( 489751 33878 2 ) utm=0 stm=0 core=2 HZ=100
F form.chefs.ski: runtime.cc:558]   | stack=0x717b82ad7000-0x717b82ad9000 stackSize=1041KB
F form.chefs.ski: runtime.cc:558]   | held mutexes=
F form.chefs.ski: runtime.cc:558]   kernel: (couldn't read /proc/self/task/5956/stack)
F form.chefs.ski: runtime.cc:558]   native: #00 pc 0000000000026b98  /system/lib64/libc.so (syscall+24)
F form.chefs.ski: runtime.cc:558]   native: #01 pc 00000000000d750a  /system/lib64/libart.so (art::ConditionVariable::TimedWait(art::Thread*, long, int)+138)
F form.chefs.ski: runtime.cc:558]   native: #02 pc 00000000003ff21f  /system/lib64/libart.so (art::Monitor::Wait(art::Thread*, long, int, bool, art::ThreadState)+671)
F form.chefs.ski: runtime.cc:558]   native: #03 pc 0000000000400db1  /system/lib64/libart.so (art::Monitor::Wait(art::Thread*, art::mirror::Object*, long, int, bool, art::ThreadState)+449)
F form.chefs.ski: runtime.cc:558]   at java.lang.Thread.sleep(Native method)
F form.chefs.ski: runtime.cc:558]   - sleeping on <0x018752ac> (a java.lang.Object)
F form.chefs.ski: runtime.cc:558]   at java.lang.Thread.sleep(Thread.java:373)
F form.chefs.ski: runtime.cc:558]   - locked <0x018752ac> (a java.lang.Object)
F form.chefs.ski: runtime.cc:558]   at java.lang.Thread.sleep(Thread.java:314)
F form.chefs.ski: runtime.cc:558]   at java.lang.Daemons$FinalizerWatchdogDaemon.sleepFor(Daemons.java:342)
F form.chefs.ski: runtime.cc:558]   at java.lang.Daemons$FinalizerWatchdogDaemon.waitForFinalization(Daemons.java:364)
F form.chefs.ski: runtime.cc:558]   at java.lang.Daemons$FinalizerWatchdogDaemon.runInternal(Daemons.java:281)
F form.chefs.ski: runtime.cc:558]   at java.lang.Daemons$Daemon.run(Daemons.java:103)
F form.chefs.ski: runtime.cc:558]   at java.lang.Thread.run(Thread.java:764)
F form.chefs.ski: runtime.cc:558] 
F form.chefs.ski: runtime.cc:558] "HeapTaskDaemon" prio=10 tid=7 WaitingForTaskProcessor
F form.chefs.ski: runtime.cc:558]   | group="" sCount=1 dsCount=0 flags=1 obj=0x12cc05b0 self=0x717b8efc6c00
F form.chefs.ski: runtime.cc:558]   | sysTid=5957 nice=4 cgrp=default sched=0/0 handle=0x717b82ad44f0
F form.chefs.ski: runtime.cc:558]   | state=S schedstat=( 654995 0 5 ) utm=0 stm=0 core=3 HZ=100
F form.chefs.ski: runtime.cc:558]   | stack=0x717b829d1000-0x717b829d3000 stackSize=1041KB
F form.chefs.ski: runtime.cc:558]   | held mutexes=
F form.chefs.ski: runtime.cc:558]   kernel: (couldn't read /proc/self/task/5957/stack)
F form.chefs.ski: runtime.cc:558]   native: #00 pc 0000000000026b98  /system/lib64/libc.so (syscall+24)
F form.chefs.ski: runtime.cc:558]   native: #01 pc 00000000000d750a  /system/lib64/libart.so (art::ConditionVariable::TimedWait(art::Thread*, long, int)+138)
F form.chefs.ski: runtime.cc:558]   native: #02 pc 00000000002477bc  /system/lib64/libart.so (art::gc::TaskProcessor::GetTask(art::Thread*)+300)
F form.chefs.ski: runtime.cc:558]   native: #03 pc 000000000024807f  /system/lib64/libart.so (art::gc::TaskProcessor::RunAllTasks(art::Thread*)+63)
F form.chefs.ski: runtime.cc:558]   at dalvik.system.VMRuntime.runHeapTasks(Native method)
F form.chefs.ski: runtime.cc:558]   at java.lang.Daemons$HeapTaskDaemon.runInternal(Daemons.java:475)
F form.chefs.ski: runtime.cc:558]   at java.lang.Daemons$Daemon.run(Daemons.java:103)
F form.chefs.ski: runtime.cc:558]   at java.lang.Thread.run(Thread.java:764)
F form.chefs.ski: runtime.cc:558] 
F form.chefs.ski: runtime.cc:558] "Binder:5947_1" prio=10 tid=8 Native
F form.chefs.ski: runtime.cc:558]   | group="" sCount=1 dsCount=0 flags=1 obj=0x12cc0638 self=0x717b90815800
F form.chefs.ski: runtime.cc:558]   | sysTid=5958 nice=0 cgrp=default sched=0/0 handle=0x717b828d04f0
F form.chefs.ski: runtime.cc:558]   | state=S schedstat=( 1203152 405942 8 ) utm=0 stm=0 core=3 HZ=100
F form.chefs.ski: runtime.cc:558]   | stack=0x717b827d5000-0x717b827d7000 stackSize=1009KB
F form.chefs.ski: runtime.cc:558]   | held mutexes=
F form.chefs.ski: runtime.cc:558]   kernel: (couldn't read /proc/self/task/5958/stack)
F form.chefs.ski: runtime.cc:558]   native: #00 pc 000000000007e315  /system/lib64/libc.so (__ioctl+5)
F form.chefs.ski: runtime.cc:558]   native: #01 pc 0000000000030cde  /system/lib64/libc.so (ioctl+206)
F form.chefs.ski: runtime.cc:558]   native: #02 pc 000000000005b40e  /system/lib64/libbinder.so (android::IPCThreadState::talkWithDriver(bool)+270)
F form.chefs.ski: runtime.cc:558]   native: #03 pc 000000000005b5f0  /system/lib64/libbinder.so (android::IPCThreadState::getAndExecuteCommand()+16)
F form.chefs.ski: runtime.cc:558]   native: #04 pc 000000000005bdd1  /system/lib64/libbinder.so (android::IPCThreadState::joinThreadPool(bool)+49)
F form.chefs.ski: runtime.cc:558]   native: #05 pc 0000000000082277  /system/lib64/libbinder.so (android::PoolThread::threadLoop()+23)
F form.chefs.ski: runtime.cc:558]   native: #06 pc 000000000000f79a  /system/lib64/libutils.so (android::Thread::_threadLoop(void*)+314)
F form.chefs.ski: runtime.cc:558]   native: #07 pc 00000000000b5573  /system/lib64/libandroid_runtime.so (android::AndroidRuntime::javaThreadShell(void*)+131)
F form.chefs.ski: runtime.cc:558]   native: #08 pc 0000000000092bab  /system/lib64/libc.so (__pthread_start(void*)+27)
F form.chefs.ski: runtime.cc:558]   native: #09 pc 000000000002af2d  /system/lib64/libc.so (__start_thread+61)
F form.chefs.ski: runtime.cc:558]   (no managed stack frames)
F form.chefs.ski: runtime.cc:558] 
F form.chefs.ski: runtime.cc:558] "Binder:5947_2" prio=10 tid=9 Native
F form.chefs.ski: runtime.cc:558]   | group="" sCount=1 dsCount=0 flags=1 obj=0x12cc06c0 self=0x717b8ee73800
F form.chefs.ski: runtime.cc:558]   | sysTid=5959 nice=0 cgrp=default sched=0/0 handle=0x717b827d24f0
F form.chefs.ski: runtime.cc:558]   | state=S schedstat=( 3916259 1868214 11 ) utm=0 stm=0 core=1 HZ=100
F form.chefs.ski: runtime.cc:558]   | stack=0x717b826d7000-0x717b826d9000 stackSize=1009KB
F form.chefs.ski: runtime.cc:558]   | held mutexes=
F form.chefs.ski: runtime.cc:558]   kernel: (couldn't read /proc/self/task/5959/stack)
F form.chefs.ski: runtime.cc:558]   native: #00 pc 000000000007e315  /system/lib64/libc.so (__ioctl+5)
F form.chefs.ski: runtime.cc:558]   native: #01 pc 0000000000030cde  /system/lib64/libc.so (ioctl+206)
F form.chefs.ski: runtime.cc:558]   native: #02 pc 000000000005b40e  /system/lib64/libbinder.so (android::IPCThreadState::talkWithDriver(bool)+270)
F form.chefs.ski: runtime.cc:558]   native: #03 pc 000000000005b5f0  /system/lib64/libbinder.so (android::IPCThreadState::getAndExecuteCommand()+16)
F form.chefs.ski: runtime.cc:558]   native: #04 pc 000000000005bdd1  /system/lib64/libbinder.so (android::IPCThreadState::joinThreadPool(bool)+49)
F form.chefs.ski: runtime.cc:558]   native: #05 pc 0000000000082277  /system/lib64/libbinder.so (android::PoolThread::threadLoop()+23)
F form.chefs.ski: runtime.cc:558]   native: #06 pc 000000000000f79a  /system/lib64/libutils.so (android::Thread::_threadLoop(void*)+314)
F form.chefs.ski: runtime.cc:558]   native: #07 pc 00000000000b5573  /system/lib64/libandroid_runtime.so (android::AndroidRuntime::javaThreadShell(void*)+131)
F form.chefs.ski: runtime.cc:558]   native: #08 pc 0000000000092bab  /system/lib64/libc.so (__pthread_start(void*)+27)
F form.chefs.ski: runtime.cc:558]   native: #09 pc 000000000002af2d  /system/lib64/libc.so (__start_thread+61)
F form.chefs.ski: runtime.cc:558]   (no managed stack frames)
F form.chefs.ski: runtime.cc:558] 
F form.chefs.ski: runtime.cc:558] "Profile Saver" prio=10 tid=10 Native
F form.chefs.ski: runtime.cc:558]   | group="" sCount=1 dsCount=0 flags=1 obj=0x12cc0748 self=0x717b9083c000
F form.chefs.ski: runtime.cc:558]   | sysTid=5960 nice=9 cgrp=default sched=0/0 handle=0x717b81ace4f0
F form.chefs.ski: runtime.cc:558]   | state=S schedstat=( 206762 58560 1 ) utm=0 stm=0 core=1 HZ=100
F form.chefs.ski: runtime.cc:558]   | stack=0x717b819d3000-0x717b819d5000 stackSize=1009KB
F form.chefs.ski: runtime.cc:558]   | held mutexes=
F form.chefs.ski: runtime.cc:558]   kernel: (couldn't read /proc/self/task/5960/stack)
F form.chefs.ski: runtime.cc:558]   native: #00 pc 0000000000026b98  /system/lib64/libc.so (syscall+24)
F form.chefs.ski: runtime.cc:558]   native: #01 pc 00000000000d750a  /system/lib64/libart.so (art::ConditionVariable::TimedWait(art::Thread*, long, int)+138)
F form.chefs.ski: runtime.cc:558]   native: #02 pc 000000000035ee8c  /system/lib64/libart.so (art::ProfileSaver::Run()+156)
F form.chefs.ski: runtime.cc:558]   native: #03 pc 0000000000362cd7  /system/lib64/libart.so (art::ProfileSaver::RunProfileSaverThread(void*)+87)
F form.chefs.ski: runtime.cc:558]   native: #04 pc 0000000000092bab  /system/lib64/libc.so (__pthread_start(void*)+27)
F form.chefs.ski: runtime.cc:558]   native: #05 pc 000000000002af2d  /system/lib64/libc.so (__start_thread+61)
F form.chefs.ski: runtime.cc:558]   (no managed stack frames)
F form.chefs.ski: runtime.cc:558] 
F form.chefs.ski: runtime.cc:558] "Thread-2" prio=10 tid=11 WaitingForCheckPointsToRun
F form.chefs.ski: runtime.cc:558]   | group="" sCount=1 dsCount=0 flags=1 obj=0x12cc1058 self=0x717b90843800
F form.chefs.ski: runtime.cc:558]   | sysTid=5962 nice=-10 cgrp=default sched=0/0 handle=0x71798868e4f0
F form.chefs.ski: runtime.cc:558]   | state=S schedstat=( 41545012 5207359 38 ) utm=4 stm=0 core=0 HZ=100
F form.chefs.ski: runtime.cc:558]   | stack=0x717988593000-0x717988595000 stackSize=1009KB
F form.chefs.ski: runtime.cc:558]   | held mutexes=
F form.chefs.ski: runtime.cc:558]   kernel: (couldn't read /proc/self/task/5962/stack)
F form.chefs.ski: runtime.cc:558]   native: #00 pc 0000000000026b96  /system/lib64/libc.so (syscall+22)
F form.chefs.ski: runtime.cc:558]   native: #01 pc 00000000000d70bc  /system/lib64/libart.so (art::ConditionVariable::WaitHoldingLocks(art::Thread*)+108)
F form.chefs.ski: runtime.cc:558]   native: #02 pc 00000000000d2196  /system/lib64/libart.so (_ZN3art7Barrier9IncrementILNS0_12LockHandlingE1EEEvPNS_6ThreadEi+70)
F form.chefs.ski: runtime.cc:558]   native: #03 pc 00000000001ccf1e  /system/lib64/libart.so (art::gc::collector::ConcurrentCopying::ActivateReadBarrierEntrypoints()+350)
F form.chefs.ski: runtime.cc:558]   native: #04 pc 00000000001cc6ad  /system/lib64/libart.so (art::gc::collector::ConcurrentCopying::RunPhases()+525)
F form.chefs.ski: runtime.cc:558]   native: #05 pc 00000000001e44a9  /system/lib64/libart.so (art::gc::collector::GarbageCollector::Run(art::gc::GcCause, bool)+345)
F form.chefs.ski: runtime.cc:558]   native: #06 pc 000000000020a01e  /system/lib64/libart.so (art::gc::Heap::CollectGarbageInternal(art::gc::collector::GcType, art::gc::GcCause, bool)+3374)
F form.chefs.ski: runtime.cc:558]   native: #07 pc 0000000000003c7e  /system/lib64/libopenjdkjvm.so (JVM_GC+94)
F form.chefs.ski: runtime.cc:558]   at java.lang.Runtime.gc(Native method)
F form.chefs.ski: runtime.cc:558] 
F form.chefs.ski: runtime.cc:558] "Thread-3" prio=10 tid=12 Native
F form.chefs.ski: runtime.cc:558]   | group="" sCount=1 dsCount=0 flags=1 obj=0x12cc07d0 self=0x717b8ee6f000
F form.chefs.ski: runtime.cc:558]   | sysTid=5961 nice=-10 cgrp=default sched=0/0 handle=0x717b7a9d84f0
F form.chefs.ski: runtime.cc:558]   | state=S schedstat=( 4085964 0 22 ) utm=0 stm=0 core=1 HZ=100
F form.chefs.ski: runtime.cc:558]   | stack=0x717b7a8dd000-0x717b7a8df000 stackSize=1009KB
F form.chefs.ski: runtime.cc:558]   | held mutexes=
F form.chefs.ski: runtime.cc:558]   kernel: (couldn't read /proc/self/task/5961/stack)
F form.chefs.ski: runtime.cc:558]   native: #00 pc 0000000000026b96  /system/lib64/libc.so (syscall+22)
F form.chefs.ski: runtime.cc:558]   native: #01 pc 0000000000029cd5  /system/lib64/libc.so (__futex_wait_ex(void volatile*, bool, int, bool, timespec const*)+133)
F form.chefs.ski: runtime.cc:558]   native: #02 pc 000000000009219d  /system/lib64/libc.so (pthread_cond_wait+45)
F form.chefs.ski: runtime.cc:558]   native: #03 pc 00000000030554c2  /data/app/uno.platform.chefs.skia-Hn38_Q2Ao0LTHQhJNMH6_A==/lib/x86_64/libChefs.so (offset 2f06000) (???)
F form.chefs.ski: runtime.cc:558]   native: #04 pc 0000000003011e3e  /data/app/uno.platform.chefs.skia-Hn38_Q2Ao0LTHQhJNMH6_A==/lib/x86_64/libChefs.so (offset 2f06000) (???)
F form.chefs.ski: runtime.cc:558]   (no managed stack frames)
F form.chefs.ski: runtime.cc:558] 
F form.chefs.ski: runtime.cc:558] "Thread-4" prio=10 tid=13 Native
F form.chefs.ski: runtime.cc:558]   | group="" sCount=1 dsCount=0 flags=1 obj=0x12cc0858 self=0x7179883af400
F form.chefs.ski: runtime.cc:558]   | sysTid=5967 nice=-10 cgrp=default sched=0/0 handle=0x7179875144f0
F form.chefs.ski: runtime.cc:558]   | state=S schedstat=( 82689275 15780805 138 ) utm=4 stm=4 core=2 HZ=100
F form.chefs.ski: runtime.cc:558]   | stack=0x717987419000-0x71798741b000 stackSize=1009KB
F form.chefs.ski: runtime.cc:558]   | held mutexes=
F form.chefs.ski: runtime.cc:558]   kernel: (couldn't read /proc/self/task/5967/stack)
F form.chefs.ski: runtime.cc:558]   native: #00 pc 0000000000026b98  /system/lib64/libc.so (syscall+24)
F form.chefs.ski: runtime.cc:558]   native: #01 pc 0000000000029cd5  /system/lib64/libc.so (__futex_wait_ex(void volatile*, bool, int, bool, timespec const*)+133)
F form.chefs.ski: runtime.cc:558]   native: #02 pc 0000000000092215  /system/lib64/libc.so (pthread_cond_timedwait+85)
F form.chefs.ski: runtime.cc:558]   native: #03 pc 0000000002ff1477  /data/app/uno.platform.chefs.skia-Hn38_Q2Ao0LTHQhJNMH6_A==/lib/x86_64/libChefs.so (offset 2f06000) (???)
F form.chefs.ski: runtime.cc:558]   native: #04 pc 00000000038e9a31  /data/app/uno.platform.chefs.skia-Hn38_Q2Ao0LTHQhJNMH6_A==/lib/x86_64/libChefs.so (offset 2f06000) (???)
F form.chefs.ski: runtime.cc:558]   native: #05 pc 00004e2000007179  ???
F form.chefs.ski: runtime.cc:558]   (no managed stack frames)
F form.chefs.ski: runtime.cc:558] 
F form.chefs.ski: runtime.cc:558] "GLThread 294" prio=10 tid=14 Waiting
F form.chefs.ski: runtime.cc:558]   | group="" sCount=1 dsCount=0 flags=1 obj=0x12cc08e0 self=0x7179883ad000
F form.chefs.ski: runtime.cc:558]   | sysTid=5971 nice=0 cgrp=default sched=0/0 handle=0x717986c034f0
F form.chefs.ski: runtime.cc:558]   | state=S schedstat=( 103682508 50152834 295 ) utm=0 stm=10 core=2 HZ=100
F form.chefs.ski: runtime.cc:558]   | stack=0x717986b00000-0x717986b02000 stackSize=1041KB
F form.chefs.ski: runtime.cc:558]   | held mutexes=
F form.chefs.ski: runtime.cc:558]   kernel: (couldn't read /proc/self/task/5971/stack)
F form.chefs.ski: runtime.cc:558]   native: #00 pc 0000000000026b96  /system/lib64/libc.so (syscall+22)
F form.chefs.ski: runtime.cc:558]   native: #01 pc 00000000000d70bc  /system/lib64/libart.so (art::ConditionVariable::WaitHoldingLocks(art::Thread*)+108)
F form.chefs.ski: runtime.cc:558]   native: #02 pc 00000000003ff20f  /system/lib64/libart.so (art::Monitor::Wait(art::Thread*, long, int, bool, art::ThreadState)+655)
F form.chefs.ski: runtime.cc:558]   native: #03 pc 0000000000400db1  /system/lib64/libart.so (art::Monitor::Wait(art::Thread*, art::mirror::Object*, long, int, bool, art::ThreadState)+449)
F form.chefs.ski: runtime.cc:558]   at java.lang.Object.wait(Native method)
F form.chefs.ski: runtime.cc:558]   - waiting on <0x0ed6cb75> (a android.opengl.GLSurfaceView$GLThreadManager)
F form.chefs.ski: runtime.cc:558]   at android.opengl.GLSurfaceView$GLThread.guardedRun(GLSurfaceView.java:1495)
F form.chefs.ski: runtime.cc:558]   - locked <0x0ed6cb75> (a android.opengl.GLSurfaceView$GLThreadManager)
F form.chefs.ski: runtime.cc:558]   at android.opengl.GLSurfaceView$GLThread.run(GLSurfaceView.java:1270)
F form.chefs.ski: runtime.cc:558] 
F form.chefs.ski: runtime.cc:558] "RenderThread" prio=10 tid=15 Native
F form.chefs.ski: runtime.cc:558]   | group="" sCount=1 dsCount=0 flags=1 obj=0x12cc0ca0 self=0x717b90870000
F form.chefs.ski: runtime.cc:558]   | sysTid=5972 nice=-10 cgrp=default sched=0/0 handle=0x717986afd4f0
F form.chefs.ski: runtime.cc:558]   | state=S schedstat=( 58714370 9426563 165 ) utm=3 stm=2 core=3 HZ=100
F form.chefs.ski: runtime.cc:558]   | stack=0x717986a02000-0x717986a04000 stackSize=1009KB
F form.chefs.ski: runtime.cc:558]   | held mutexes=
F form.chefs.ski: runtime.cc:558]   kernel: (couldn't read /proc/self/task/5972/stack)
F form.chefs.ski: runtime.cc:558]   native: #00 pc 000000000007e1da  /system/lib64/libc.so (__epoll_pwait+10)
F form.chefs.ski: runtime.cc:558]   native: #01 pc 0000000000013d12  /system/lib64/libutils.so (android::Looper::pollInner(int)+162)
F form.chefs.ski: runtime.cc:558]   native: #02 pc 0000000000013bc9  /system/lib64/libutils.so (android::Looper::pollOnce(int, int*, int*, void**)+41)
F form.chefs.ski: runtime.cc:558]   native: #03 pc 0000000000119d1b  /system/lib64/libhwui.so (android::uirenderer::renderthread::RenderThread::threadLoop()+251)
F form.chefs.ski: runtime.cc:558]   native: #04 pc 000000000000f79a  /system/lib64/libutils.so (android::Thread::_threadLoop(void*)+314)
F form.chefs.ski: runtime.cc:558]   native: #05 pc 0000000000092bab  /system/lib64/libc.so (__pthread_start(void*)+27)
F form.chefs.ski: runtime.cc:558]   native: #06 pc 000000000002af2d  /system/lib64/libc.so (__start_thread+61)
F form.chefs.ski: runtime.cc:558]   (no managed stack frames)
F form.chefs.ski: runtime.cc:558] 
F form.chefs.ski: runtime.cc:558] "Thread-6" prio=10 tid=16 Native
F form.chefs.ski: runtime.cc:558]   | group="" sCount=1 dsCount=0 flags=1 obj=0x12cc0d28 self=0x7179871fbc00
F form.chefs.ski: runtime.cc:558]   | sysTid=5969 nice=-10 cgrp=default sched=0/0 handle=0x717986dff4f0
F form.chefs.ski: runtime.cc:558]   | state=S schedstat=( 46114863 3169360 54 ) utm=4 stm=0 core=2 HZ=100
F form.chefs.ski: runtime.cc:558]   | stack=0x717986d04000-0x717986d06000 stackSize=1009KB
F form.chefs.ski: runtime.cc:558]   | held mutexes=
F form.chefs.ski: runtime.cc:558]   kernel: (couldn't read /proc/self/task/5969/stack)
F form.chefs.ski: runtime.cc:558]   native: #00 pc 0000000000026b98  /system/lib64/libc.so (syscall+24)
F form.chefs.ski: runtime.cc:558]   native: #01 pc 0000000000029cd5  /system/lib64/libc.so (__futex_wait_ex(void volatile*, bool, int, bool, timespec const*)+133)
F form.chefs.ski: runtime.cc:558]   native: #02 pc 0000000000092215  /system/lib64/libc.so (pthread_cond_timedwait+85)
F form.chefs.ski: runtime.cc:558]   native: #03 pc 0000000002ff1477  /data/app/uno.platform.chefs.skia-Hn38_Q2Ao0LTHQhJNMH6_A==/lib/x86_64/libChefs.so (offset 2f06000) (???)
F form.chefs.ski: runtime.cc:558]   native: #04 pc 00000000038e9a31  /data/app/uno.platform.chefs.skia-Hn38_Q2Ao0LTHQhJNMH6_A==/lib/x86_64/libChefs.so (offset 2f06000) (???)
F form.chefs.ski: runtime.cc:558]   native: #05 pc 00004e2000007179  ???
F form.chefs.ski: runtime.cc:558]   (no managed stack frames)
F form.chefs.ski: runtime.cc:558] 
F form.chefs.ski: runtime.cc:558] "Binder:5947_3" prio=10 tid=17 Native
F form.chefs.ski: runtime.cc:558]   | group="" sCount=1 dsCount=0 flags=1 obj=0x12cc0db0 self=0x71798820f400
F form.chefs.ski: runtime.cc:558]   | sysTid=5973 nice=0 cgrp=default sched=0/0 handle=0x7179865ff4f0
F form.chefs.ski: runtime.cc:558]   | state=S schedstat=( 1344899 214088 6 ) utm=0 stm=0 core=1 HZ=100
F form.chefs.ski: runtime.cc:558]   | stack=0x717986504000-0x717986506000 stackSize=1009KB
F form.chefs.ski: runtime.cc:558]   | held mutexes=
F form.chefs.ski: runtime.cc:558]   kernel: (couldn't read /proc/self/task/5973/stack)
F form.chefs.ski: runtime.cc:558]   native: #00 pc 000000000007e315  /system/lib64/libc.so (__ioctl+5)
F form.chefs.ski: runtime.cc:558]   native: #01 pc 0000000000030cde  /system/lib64/libc.so (ioctl+206)
F form.chefs.ski: runtime.cc:558]   native: #02 pc 000000000005b40e  /system/lib64/libbinder.so (android::IPCThreadState::talkWithDriver(bool)+270)
F form.chefs.ski: runtime.cc:558]   native: #03 pc 000000000005b5f0  /system/lib64/libbinder.so (android::IPCThreadState::getAndExecuteCommand()+16)
F form.chefs.ski: runtime.cc:558]   native: #04 pc 000000000005bdd1  /system/lib64/libbinder.so (android::IPCThreadState::joinThreadPool(bool)+49)
F form.chefs.ski: runtime.cc:558]   native: #05 pc 0000000000082277  /system/lib64/libbinder.so (android::PoolThread::threadLoop()+23)
F form.chefs.ski: runtime.cc:558]   native: #06 pc 000000000000f79a  /system/lib64/libutils.so (android::Thread::_threadLoop(void*)+314)
F form.chefs.ski: runtime.cc:558]   native: #07 pc 00000000000b5573  /system/lib64/libandroid_runtime.so (android::AndroidRuntime::javaThreadShell(void*)+131)
F form.chefs.ski: runtime.cc:558]   native: #08 pc 0000000000092bab  /system/lib64/libc.so (__pthread_start(void*)+27)
F form.chefs.ski: runtime.cc:558]   native: #09 pc 000000000002af2d  /system/lib64/libc.so (__start_thread+61)
F form.chefs.ski: runtime.cc:558]   (no managed stack frames)
F form.chefs.ski: runtime.cc:558] 
F form.chefs.ski: runtime.cc:558] "hwuiTask1" prio=10 tid=18 Native
F form.chefs.ski: runtime.cc:558]   | group="" sCount=1 dsCount=0 flags=1 obj=0x12cc0e38 self=0x717b90877800
F form.chefs.ski: runtime.cc:558]   | sysTid=5974 nice=-2 cgrp=default sched=0/0 handle=0x7179855ff4f0
F form.chefs.ski: runtime.cc:558]   | state=S schedstat=( 2361382 2475967 19 ) utm=0 stm=0 core=0 HZ=100
F form.chefs.ski: runtime.cc:558]   | stack=0x717985504000-0x717985506000 stackSize=1009KB
F form.chefs.ski: runtime.cc:558]   | held mutexes=
F form.chefs.ski: runtime.cc:558]   kernel: (couldn't read /proc/self/task/5974/stack)
F form.chefs.ski: runtime.cc:558]   native: #00 pc 0000000000026b96  /system/lib64/libc.so (syscall+22)
F form.chefs.ski: runtime.cc:558]   native: #01 pc 0000000000029cd5  /system/lib64/libc.so (__futex_wait_ex(void volatile*, bool, int, bool, timespec const*)+133)
F form.chefs.ski: runtime.cc:558]   native: #02 pc 000000000009219d  /system/lib64/libc.so (pthread_cond_wait+45)
F form.chefs.ski: runtime.cc:558]   native: #03 pc 00000000004b5978  /system/lib64/libhwui.so (android::uirenderer::TaskManager::WorkerThread::threadLoop()+328)
F form.chefs.ski: runtime.cc:558]   native: #04 pc 000000000000f73e  /system/lib64/libutils.so (android::Thread::_threadLoop(void*)+222)
F form.chefs.ski: runtime.cc:558]   native: #05 pc 00000000000b5573  /system/lib64/libandroid_runtime.so (android::AndroidRuntime::javaThreadShell(void*)+131)
F form.chefs.ski: runtime.cc:558]   native: #06 pc 0000000000092bab  /system/lib64/libc.so (__pthread_start(void*)+27)
F form.chefs.ski: runtime.cc:558]   native: #07 pc 000000000002af2d  /system/lib64/libc.so (__start_thread+61)
F form.chefs.ski: runtime.cc:558]   (no managed stack frames)
F form.chefs.ski: runtime.cc:558] 
F form.chefs.ski: runtime.cc:558] "Thread-7" prio=10 tid=19 Native
F form.chefs.ski: runtime.cc:558]   | group="" sCount=1 dsCount=0 flags=1 obj=0x12cc0ec0 self=0x7179883ae800
F form.chefs.ski: runtime.cc:558]   | sysTid=5976 nice=-10 cgrp=default sched=0/0 handle=0x717984d2f4f0
F form.chefs.ski: runtime.cc:558]   | state=S schedstat=( 37152175 16123358 53 ) utm=2 stm=1 core=3 HZ=100
F form.chefs.ski: runtime.cc:558]   | stack=0x717984c34000-0x717984c36000 stackSize=1009KB
F form.chefs.ski: runtime.cc:558]   | held mutexes=
F form.chefs.ski: runtime.cc:558]   kernel: (couldn't read /proc/self/task/5976/stack)
F form.chefs.ski: runtime.cc:558]   native: #00 pc 0000000000026b98  /system/lib64/libc.so (syscall+24)
F form.chefs.ski: runtime.cc:558]   native: #01 pc 0000000000029cd5  /system/lib64/libc.so (__futex_wait_ex(void volatile*, bool, int, bool, timespec const*)+133)
F form.chefs.ski: runtime.cc:558]   native: #02 pc 0000000000092215  /system/lib64/libc.so (pthread_cond_timedwait+85)
F form.chefs.ski: runtime.cc:558]   native: #03 pc 0000000002ff1477  /data/app/uno.platform.chefs.skia-Hn38_Q2Ao0LTHQhJNMH6_A==/lib/x86_64/libChefs.so (offset 2f06000) (???)
F form.chefs.ski: runtime.cc:558]   native: #04 pc 00000000038e9a31  /data/app/uno.platform.chefs.skia-Hn38_Q2Ao0LTHQhJNMH6_A==/lib/x86_64/libChefs.so (offset 2f06000) (???)
F form.chefs.ski: runtime.cc:558]   native: #05 pc 00004e2000007179  ???
F form.chefs.ski: runtime.cc:558]   (no managed stack frames)
F form.chefs.ski: runtime.cc:558] 
F form.chefs.ski: runtime.cc:558] "Thread-8" prio=10 tid=20 Native
F form.chefs.ski: runtime.cc:558]   | group="" sCount=1 dsCount=0 flags=1 obj=0x12cc0f48 self=0x717b90962800
F form.chefs.ski: runtime.cc:558]   | sysTid=5977 nice=-10 cgrp=default sched=0/0 handle=0x71798422d4f0
F form.chefs.ski: runtime.cc:558]   | state=S schedstat=( 46688421 42540672 60 ) utm=1 stm=3 core=3 HZ=100
F form.chefs.ski: runtime.cc:558]   | stack=0x717984132000-0x717984134000 stackSize=1009KB
F form.chefs.ski: runtime.cc:558]   | held mutexes=
F form.chefs.ski: runtime.cc:558]   kernel: (couldn't read /proc/self/task/5977/stack)
F form.chefs.ski: runtime.cc:558]   native: #00 pc 0000000000026b98  /system/lib64/libc.so (syscall+24)
F form.chefs.ski: runtime.cc:558]   native: #01 pc 0000000000029cd5  /system/lib64/libc.so (__futex_wait_ex(void volatile*, bool, int, bool, timespec const*)+133)
F form.chefs.ski: runtime.cc:558]   native: #02 pc 0000000000092215  /system/lib64/libc.so (pthread_cond_timedwait+85)
F form.chefs.ski: runtime.cc:558]   native: #03 pc 0000000002ff1477  /data/app/uno.platform.chefs.skia-Hn38_Q2Ao0LTHQhJNMH6_A==/lib/x86_64/libChefs.so (offset 2f06000) (???)
F form.chefs.ski: runtime.cc:558]   native: #04 pc 00000000038e9a31  /data/app/uno.platform.chefs.skia-Hn38_Q2Ao0LTHQhJNMH6_A==/lib/x86_64/libChefs.so (offset 2f06000) (???)
F form.chefs.ski: runtime.cc:558]   native: #05 pc 00004e2000007179  ???
F form.chefs.ski: runtime.cc:558]   (no managed stack frames)
F form.chefs.ski: runtime.cc:558] 
F form.chefs.ski: runtime.cc:558] "Thread-9" prio=10 tid=21 Native
F form.chefs.ski: runtime.cc:558]   | group="" sCount=1 dsCount=0 flags=1 obj=0x12cc0fd0 self=0x717984b4d000
F form.chefs.ski: runtime.cc:558]   | sysTid=5978 nice=-10 cgrp=default sched=0/0 handle=0x71798412f4f0
F form.chefs.ski: runtime.cc:558]   | state=S schedstat=( 11902223 24562907 19 ) utm=1 stm=0 core=1 HZ=100
F form.chefs.ski: runtime.cc:558]   | stack=0x717984034000-0x717984036000 stackSize=1009KB
F form.chefs.ski: runtime.cc:558]   | held mutexes=
F form.chefs.ski: runtime.cc:558]   kernel: (couldn't read /proc/self/task/5978/stack)
F form.chefs.ski: runtime.cc:558]   native: #00 pc 0000000000026b98  /system/lib64/libc.so (syscall+24)
F form.chefs.ski: runtime.cc:558]   native: #01 pc 0000000000029cd5  /system/lib64/libc.so (__futex_wait_ex(void volatile*, bool, int, bool, timespec const*)+133)
F form.chefs.ski: runtime.cc:558]   native: #02 pc 0000000000092215  /system/lib64/libc.so (pthread_cond_timedwait+85)
F form.chefs.ski: runtime.cc:558]   native: #03 pc 0000000002ff1477  /data/app/uno.platform.chefs.skia-Hn38_Q2Ao0LTHQhJNMH6_A==/lib/x86_64/libChefs.so (offset 2f06000) (???)
F form.chefs.ski: runtime.cc:558]   native: #04 pc 00000000038e9a31  /data/app/uno.platform.chefs.skia-Hn38_Q2Ao0LTHQhJNMH6_A==/lib/x86_64/libChefs.so (offset 2f06000) (???)
F form.chefs.ski: runtime.cc:558]   native: #05 pc 00004e200000717b  ???
F form.chefs.ski: runtime.cc:558]   (no managed stack frames)
F form.chefs.ski: runtime.cc:558] 
F form.chefs.ski: runtime.cc:558] Aborting thread:
F form.chefs.ski: runtime.cc:558] "main" prio=10 tid=1 Runnable
F form.chefs.ski: runtime.cc:558]   | group="" sCount=1 dsCount=0 flags=9 obj=0x75c45a48 self=0x717b96c14c00
F form.chefs.ski: runtime.cc:558]   | sysTid=5947 nice=-10 cgrp=default sched=0/0 handle=0x717c1c452548
F form.chefs.ski: runtime.cc:558]   | state=R schedstat=( 717226410 100972163 836 ) utm=62 stm=9 core=2 HZ=100
F form.chefs.ski: runtime.cc:558]   | stack=0x7ffe6ddbd000-0x7ffe6ddbf000 stackSize=8MB
F form.chefs.ski: runtime.cc:558]   | held mutexes= "abort lock" "mutator lock"(shared held)
F form.chefs.ski: runtime.cc:558]   native: #00 pc 0000000000403e33  /system/lib64/libart.so (art::DumpNativeStack(std::__1::basic_ostream<char, std::__1::char_traits<char>>&, int, BacktraceMap*, char const*, art::ArtMethod*, void*, bool)+227)
F form.chefs.ski: runtime.cc:558]   native: #01 pc 00000000004ee1f7  /system/lib64/libart.so (art::Thread::DumpStack(std::__1::basic_ostream<char, std::__1::char_traits<char>>&, bool, BacktraceMap*, bool) const+343)
F form.chefs.ski: runtime.cc:558]   native: #02 pc 00000000004d0b8f  /system/lib64/libart.so (art::AbortState::DumpThread(std::__1::basic_ostream<char, std::__1::char_traits<char>>&, art::Thread*) const+47)
F form.chefs.ski: runtime.cc:558]   native: #03 pc 00000000004bfa4d  /system/lib64/libart.so (art::Runtime::Abort(char const*)+1149)
F form.chefs.ski: runtime.cc:558]   native: #04 pc 0000000000008cdc  /system/lib64/libbase.so (android::base::LogMessage::~LogMessage()+716)
F form.chefs.ski: runtime.cc:558]   native: #05 pc 000000000025b863  /system/lib64/libart.so (art::IndirectReferenceTable::AbortIfNoCheckJNI(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char>> const&)+243)
F form.chefs.ski: runtime.cc:558]   native: #06 pc 00000000003252f2  /system/lib64/libart.so (art::IndirectReferenceTable::GetChecked(void*) const+466)
F form.chefs.ski: runtime.cc:558]   native: #07 pc 000000000031fc32  /system/lib64/libart.so (art::JavaVMExt::DecodeGlobal(void*)+18)
F form.chefs.ski: runtime.cc:558]   native: #08 pc 00000000004f41c5  /system/lib64/libart.so (art::Thread::DecodeJObject(_jobject*) const+165)
F form.chefs.ski: runtime.cc:558]   native: #09 pc 00000000003c507f  /system/lib64/libart.so (_ZN3art3JNI23DecodeAndCheckArrayTypeIP12_jfloatArrayfNS_6mirror14PrimitiveArrayIfEEEEPT1_RNS_18ScopedObjectAccessET_PKcSD_+47)
F form.chefs.ski: runtime.cc:558]   native: #10 pc 00000000003b9640  /system/lib64/libart.so (art::JNI::GetFloatArrayRegion(_JNIEnv*, _jfloatArray*, int, int, float*)+800)
F form.chefs.ski: runtime.cc:558]   native: #11 pc 0000000003332767  /data/app/uno.platform.chefs.skia-Hn38_Q2Ao0LTHQhJNMH6_A==/lib/x86_64/libChefs.so (offset 2f06000) (???)
F form.chefs.ski: runtime.cc:558]   native: #12 pc 0000000003abde5c  /data/app/uno.platform.chefs.skia-Hn38_Q2Ao0LTHQhJNMH6_A==/lib/x86_64/libChefs.so (offset 2f06000) (???)
F form.chefs.ski: runtime.cc:558]   native: #13 pc 00000000000147f7  <anonymous:71798f400000> (???)
F form.chefs.ski: runtime.cc:558]   at crc64fe881b1858fb9a5d.SimpleOrientationSensor_OrientationListener.n_onSensorChanged(Native method)
F form.chefs.ski: runtime.cc:558]   at crc64fe881b1858fb9a5d.SimpleOrientationSensor_OrientationListener.onSensorChanged(SimpleOrientationSensor_OrientationListener.java:37)
F form.chefs.ski: runtime.cc:558]   at android.hardware.SystemSensorManager$SensorEventQueue.dispatchSensorEvent(SystemSensorManager.java:833)
F form.chefs.ski: runtime.cc:558]   at android.os.MessageQueue.nativePollOnce(Native method)
F form.chefs.ski: runtime.cc:558]   at android.os.MessageQueue.next(MessageQueue.java:326)
F form.chefs.ski: runtime.cc:558]   at android.os.Looper.loop(Looper.java:160)
F form.chefs.ski: runtime.cc:558]   at android.app.ActivityThread.main(ActivityThread.java:6669)
F form.chefs.ski: runtime.cc:558]   at java.lang.reflect.Method.invoke(Native method)
F form.chefs.ski: runtime.cc:558]   at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493)
F form.chefs.ski: runtime.cc:558]   at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858)
F form.chefs.ski: runtime.cc:558] 
F libc    : Fatal signal 6 (SIGABRT), code -6 (SI_TKILL) in tid 5947 (form.chefs.skia), pid 5947 (form.chefs.skia)

[jonpryor]

"So," thinks I, "what about GREF logging?"

adb shell setprop debug.dotnet.log gref

That produces no output. Doh!

adb shell setprop debug.mono.log gref

Does produce output, but it's quite minimal:

I monodroid-gref: +g+ grefc 1 gwrefc 0 obj-handle 0x7fff0d1ccae8/* -> new-handle 0x29e6/* from thread '<null>'(0)

Where are my stack traces at?

Next I try:

adb shell setprop debug.mono.log gref+

This immediately crashes:

F DEBUG   : *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ***
F DEBUG   : Build fingerprint: 'google/sdk_gphone_x86_64/generic_x86_64:9/PSR1.180720.075/5124027:user/release-keys'
F DEBUG   : Revision: '0'
F DEBUG   : ABI: 'x86_64'
F DEBUG   : pid: 9081, tid: 9081, name: form.chefs.skia  >>> uno.platform.chefs.skia <<<
F DEBUG   : signal 11 (SIGSEGV), code 1 (SEGV_MAPERR), fault addr 0x0
F DEBUG   : Cause: null pointer dereference
F DEBUG   :     rax 0000000000000000  rbx 0000000000000001  rcx 0000000000000006  rdx 00007aa40c400000
F DEBUG   :     r8  fffffffffffffff0  r9  0000000000000000  r10 00007aa48cb68370  r11 0000000000000206
F DEBUG   :     r12 0000000000000000  r13 0000000000000001  r14 00007aa3f6f67fb0  r15 00000000000029e6
F DEBUG   :     rdi 00007aa40c427208  rsi 00007aa40c5c4e00
F DEBUG   :     rbp 00007fff0d1cc7e0  rsp 00007fff0d1cc540  rip 00007aa3f319f5c0
F DEBUG   : 
F DEBUG   : backtrace:
F DEBUG   :     #00 pc 00000000030d05c0  /data/app/uno.platform.chefs.skia-Iqzt05HN0djhiaKkWjWDww==/lib/x86_64/libChefs.so (offset 0x2f06000)
F DEBUG   :     #01 pc 00000000035ddef4  /data/app/uno.platform.chefs.skia-Iqzt05HN0djhiaKkWjWDww==/lib/x86_64/libChefs.so (offset 0x2f06000)
F DEBUG   :     #02 pc 0000000000000001  <unknown>

Oof.

File output?

adb shell setprop debug.mono.log 'gref=/data/local/tmp/g.txt' 

That works (in that the app doesn't immediately crash at startup).

Unfortunately, it also doesn't work, in that /data/local/tmp/g.txt is not created.

No stack traces for me!

Also unsurprisingly, enabling GREF logging -- however minimal -- "fixes" the GREF crash. (Fun!)

I'm not sure how to provide more info about the crash. ☹️

[jonpryor]

I should also note that I observed this on an emulator created with:

#!/bin/sh -ex

TMP="$HOME/Developer/tmp"
export ANDROID_HOME="$HOME/android-toolchain/sdk"
export ANDROID_PREFS_ROOT="${ANDROID_PREFS_ROOT:=$HOME}"

AVD_NAME="xamarin_android_emulator"
AVD_ABI=x86_64

AVDMANAGER="$ANDROID_HOME/cmdline-tools/12.0/bin/avdmanager"

if "$AVDMANAGER" list avd | grep "Name: $AVD_NAME" >/dev/null 2>&1; then
  "$AVDMANAGER" delete avd -n "$AVD_NAME"
fi

echo "no" | "$ANDROID_HOME/cmdline-tools/12.0/bin/avdmanager" create avd \
  -n "$AVD_NAME" --abi "$AVD_ABI" \
  -k "system-images;android-28;google_apis_playstore;x86_64" \
  --sdcard 128M

exec "$ANDROID_HOME/emulator/emulator" -avd "$AVD_NAME" \
  -skin 1280x800 -memory 4096 -gpu swiftshader_indirect -no-snapshot \
  -no-boot-anim -noaudio -prop ro.debuggable=1 \
  > "$TMP/loge.txt" 2>&1 

[jonpryor]

And another added observed wrinkle: crashes (for me) happen more reliably if debug.mono.log is not set, i.e. immediately after launching the emulator, the first three launches crashed. Fourth launch was "fine"; fifth launch crashed, sixth launch was "fine."

Set debug.mono.log=gref, and the next 5 launches did not crash.

"Clear" debug.mono.log ¹, first launch crashed (this time; previous attempt I didn't see a crash until I recreated the emulator), and next 5 launches did not crash.

Footnotes

1. adb shell setprop debug.mono.log '""' ↩