null pointer dereference - (ParticleSystemParticles::CopyToArrayAOS) after Unity Update

Unity Engine
, ,
1

Hello I think I may be experiencing a bug in Unity due to the way I am saving and reloading particles between physics scenes.

First off here is the error I am getting.

Android Logs

04-12 09:28:01.812  3437  3538 E CRASH   : *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ***
04-12 09:28:01.812  3437  3538 E CRASH   : Version '2020.3.46f1 (18bc01a066b4)', Build type 'Development', Scripting Backend 'il2cpp', CPU 'arm64-v8a'
04-12 09:28:01.812  3437  3538 E CRASH   : Build fingerprint: 'google/raven/raven:13/TQ2A.230305.008.E1/9677224:user/release-keys'
04-12 09:28:01.812  3437  3538 E CRASH   : Revision: 'MP1.0'
04-12 09:28:01.812  3437  3538 E CRASH   : ABI: 'arm64'
04-12 09:28:01.812  3437  3538 E CRASH   : Timestamp: 2023-04-12 09:28:01-0700
04-12 09:28:01.812  3437  3538 E CRASH   : pid: 3437, tid: 3538, name: Job.Worker 2  >>> com.breakstepstudios.commandcenterearth <<<
04-12 09:28:01.812  3437  3538 E CRASH   : uid: 10427
04-12 09:28:01.812  3437  3538 E CRASH   : signal 11 (SIGSEGV), code 1 (SEGV_MAPERR), fault addr 0x204
04-12 09:28:01.812  3437  3538 E CRASH   : Cause: null pointer dereference
04-12 09:28:01.812  3437  3538 E CRASH   :     x0  0000007671d95230  x1  000000772b467748  x2  0000000000000001  x3  0000000000000081
04-12 09:28:01.812  3437  3538 E CRASH   :     x4  000000772b4688a0  x5  000000772b4677d8  x6  000000006a1a66eb  x7  00000076d0027280
04-12 09:28:01.812  3437  3538 E CRASH   :     x8  0000000000000204  x9  000000772b46776c  x10 0000000000000000  x11 000000772b467778
04-12 09:28:01.812  3437  3538 E CRASH   :     x12 0000000000000001  x13 000000772b467748  x14 0000000000000204  x15 41d8cc8241f09564
04-12 09:28:01.812  3437  3538 E CRASH   :     x16 0000000000000000  x17 0000007a63a10fe0  x18 0000000000002ede  x19 000000772b467748
04-12 09:28:01.812  3437  3538 E CRASH   :     x20 0000007671d95230  x21 0000000000000000  x22 0000000000000081  x23 0000000000000001
04-12 09:28:01.812  3437  3538 E CRASH   :     x24 0000007671d95848  x25 000000772b4677c0  x26 0000000000000084  x27 0000007723771e30
04-12 09:28:01.812  3437  3538 E CRASH   :     x28 0000000000000081  x29 0000000000000002
04-12 09:28:01.812  3437  3538 E CRASH   :     sp  000000772b4676d0  lr  000000772298bf48  pc  00000077227eca44
04-12 09:28:01.812  3437  3538 E CRASH   : backtrace:
04-12 09:28:01.812  3437  3538 E CRASH   :       #00 pc 0000000000b6fa44  /data/app/~~RDoVFOH7CHhukFChKdwo_Q==/com.breakstepstudios.commandcenterearth-pqs_0V62gpIYLagrpQRwEw==/lib/arm64/libunity.so (ParticleSystemParticles::CopyToArrayAOS(ParticleSystemParticle*, int, int) const+176) (BuildId: 4e68e86bbb46cea51faef290d2c29a1f596cb4b6)
04-12 09:28:01.813  3437  3538 E CRASH   :       #01 pc 0000000000d0ef44  /data/app/~~RDoVFOH7CHhukFChKdwo_Q==/com.breakstepstudios.commandcenterearth-pqs_0V62gpIYLagrpQRwEw==/lib/arm64/libunity.so (ParticleSystemTrailGeometryJob::ConfigurePerParticleTrailParams(ParticleLineParameters&, ParticleSystemParticles const*, unsigned long, ParticleSystemTrailGeometryJob const&, float)+56) (BuildId: 4e68e86bbb46cea51faef290d2c29a1f596cb4b6)
04-12 09:28:01.813  3437  3538 E CRASH   :       #02 pc 0000000000d0daf8  /data/app/~~RDoVFOH7CHhukFChKdwo_Q==/com.breakstepstudios.commandcenterearth-pqs_0V62gpIYLagrpQRwEw==/lib/arm64/libunity.so (ParticleSystemTrailGeometryJob::RenderJobCommon(ParticleSystemTrailGeometryJob&, void*, unsigned int)+1608) (BuildId: 4e68e86bbb46cea51faef290d2c29a1f596cb4b6)
04-12 09:28:01.813  3437  3538 E CRASH   :       #03 pc 0000000000d0cca4  /data/app/~~RDoVFOH7CHhukFChKdwo_Q==/com.breakstepstudios.commandcenterearth-pqs_0V62gpIYLagrpQRwEw==/lib/arm64/libunity.so (ParticleSystemTrailGeometryJob::RenderJob(SharedGeometryJobData*, unsigned int)+100) (BuildId: 4e68e86bbb46cea51faef290d2c29a1f596cb4b6)
04-12 09:28:01.813  3437  3538 E CRASH   :       #04 pc 00000000005030a0  /data/app/~~RDoVFOH7CHhukFChKdwo_Q==/com.breakstepstudios.commandcenterearth-pqs_0V62gpIYLagrpQRwEw==/lib/arm64/libunity.so (JobQueue::Exec(JobInfo*, long long, int, bool)+120) (BuildId: 4e68e86bbb46cea51faef290d2c29a1f596cb4b6)
04-12 09:28:01.813  3437  3538 E CRASH   :       #05 pc 0000000000503388  /data/app/~~RDoVFOH7CHhukFChKdwo_Q==/com.breakstepstudios.commandcenterearth-pqs_0V62gpIYLagrpQRwEw==/lib/arm64/libunity.so (JobQueue::Steal(JobGroup*, JobInfo*, long long, int, bool, bool)+344) (BuildId: 4e68e86bbb46cea51faef290d2c29a1f596cb4b6)
04-12 09:28:01.813  3437  3538 E CRASH   :       #06 pc 00000000005034ec  /data/app/~~RDoVFOH7CHhukFChKdwo_Q==/com.breakstepstudios.commandcenterearth-pqs_0V62gpIYLagrpQRwEw==/lib/arm64/libunity.so (JobQueue::ExecuteJobFromQueue(bool, bool&)+172) (BuildId: 4e68e86bbb46cea51faef290d2c29a1f596cb4b6)
04-12 09:28:01.813  3437  3538 E CRASH   :       #07 pc 0000000000503958  /data/app/~~RDoVFOH7CHhukFChKdwo_Q==/com.breakstepstudios.commandcenterearth-pqs_0V62gpIYLagrpQRwEw==/lib/arm64/libunity.so (JobQueue::ProcessJobs(JobQueue::ThreadInfo*, void*)+912) (BuildId: 4e68e86bbb46cea51faef290d2c29a1f596cb4b6)
04-12 09:28:01.813  3437  3538 E CRASH   :       #08 pc 0000000000502a48  /data/app/~~RDoVFOH7CHhukFChKdwo_Q==/com.breakstepstudios.commandcenterearth-pqs_0V62gpIYLagrpQRwEw==/lib/arm64/libunity.so (JobQueue::WorkLoop(void*)+228) (BuildId: 4e68e86bbb46cea51faef290d2c29a1f596cb4b6)
04-12 09:28:01.814  3437  3538 E CRASH   :       #09 pc 00000000007044f4  /data/app/~~RDoVFOH7CHhukFChKdwo_Q==/com.breakstepstudios.commandcenterearth-pqs_0V62gpIYLagrpQRwEw==/lib/arm64/libunity.so (Thread::RunThreadWrapper(void*)+512) (BuildId: 4e68e86bbb46cea51faef290d2c29a1f596cb4b6)
04-12 09:28:01.814  3437  3538 E CRASH   :       #10 pc 00000000000c226c  /apex/com.android.runtime/lib64/bionic/libc.so (__pthread_start(void*)+204) (BuildId: dc4001c2ef2dfc23467040797a96840c)
04-12 09:28:01.814  3437  3538 E CRASH   :       #11 pc 0000000000054a30  /apex/com.android.runtime/lib64/bionic/libc.so (__start_thread+64) (BuildId: dc4001c2ef2dfc23467040797a96840c)

And here is how I am saving and loading my particle system state (including trails)

ParticleSystemExtensions (Save & Restore Snapshots)

using UnityEngine;

namespace StudioName.Runtime.ExtensionAndHelpers
{
    /// <summary>
    /// Extends the <see cref="UnityEngine.ParticleSystem"/> class with additional functionality
    /// </summary>
    public static class ParticleSystemExtensions
    {
        /// <summary>
        /// Saves this point in time for the particle system in order to restore to this point in time later
        /// </summary>
        /// <param name="particleSystem">The particle system we are operating on</param>
        /// <param name="withChildren">If true will also snapshot the child particle systems as well, false will only save this particle system.</param>
        /// <returns>The snapshot/s to restore to later. If withChildren is false only first element will be filled</returns>
        public static ParticleSystemSnapshot[] SaveSnapshot(this ParticleSystem particleSystem, bool withChildren = true)
        {
            //don't save children so only snapshot current particle system
            if (!withChildren)
            {
                return new[] { SaveSnapshotInternal(particleSystem) };
            }
         
            //we want to save children as well so loop through and snapshot all of them returning them in order snapshotted
            var particleSystems = particleSystem.GetComponentsInChildren<ParticleSystem>();
            var snapshots = new ParticleSystemSnapshot[particleSystems.Length];
            for (var i = 0; i < particleSystems.Length; i++)
            {
                snapshots[i] = particleSystems[i].SaveSnapshotInternal();
            }
         
            return snapshots;
        }

        /// <summary>
        /// Restore the particle system to the point in time provided by the snapshots
        /// </summary>
        /// <param name="particleSystem">The particle system we are operating on</param>
        /// <param name="snapshots">The snapshot/s in time to restore the particle system (and potentially it's children) to. If withChildren = false only one particle system need be specified</param>
        /// <param name="withChildren">If true will also restore the children with the snapshots provided, false will only restore this particle system</param>
        public static void RestoreSnapshot(this ParticleSystem particleSystem, ParticleSystemSnapshot[] snapshots, bool withChildren = true)
        {
            if (!withChildren)
            {
                //throw an exception if we don't at least have one snapshot
                if (snapshots.Length <= 0)
                {
                    throw new System.Exception("No snapshots provided to restore to");
                }
                particleSystem.RestoreSnapshotInternal(snapshots[0]);
                return;
            }
         
            var particleSystems = particleSystem.GetComponentsInChildren<ParticleSystem>();
            //throw an exception if we don't have the same number of snapshots as particle systems
            //TODO we may not want to throw an exception here as maybe they only want to restore a subset of particle systems
            if (snapshots.Length < particleSystems.Length)
            {
                throw new System.Exception("Number of snapshots provided does not match number of particle systems.");
            }
         
            //restore all of our child particle system
            for(var i = 0; i < particleSystems.Length; i++)
            {
                particleSystems[i].RestoreSnapshotInternal(snapshots[i]);
            }
        }

        /// <summary>
        /// Restore the particle system to this point in time
        /// </summary>
        /// <param name="particleSystem">The particle system we are operating on</param>
        /// <param name="snapshot">The snapshot in time to restore the particle system to</param>
        public static void RestoreSnapshotInternal(this ParticleSystem particleSystem, ParticleSystemSnapshot snapshot)
        {
            particleSystem.SetPlaybackState(snapshot.playbackState);
            particleSystem.SetParticles(snapshot.particles, snapshot.particles.Length);
            particleSystem.SetTrails(snapshot.trails);
            //TODO the below may be buggy, double check returning to correct play state is working as it's supposed to later
            //if our particle was stopped when we saved our snapshot that means no particles were alive so clear them all
            //and don't continue below
            if(snapshot.isStopped)
            {
                particleSystem.Stop(false, ParticleSystemStopBehavior.StopEmittingAndClear);
                return;
            }
            //if we are paused we are not playing or emitting
            if (snapshot.isPaused)
            {
                particleSystem.Pause(false);
                return;
            }
            //if we were playing ensure we start things back up again
            if (snapshot.isPlaying)
            {
                particleSystem.Play(false);
            }
            //we may have been playing but called Stop(ParticleSystemStopBehavior.StopEmitting) when we saved the snapshot
            //bottom line make sure to stop emitting if that's what we were doing when snapshot was saved
            if (!snapshot.isEmitting)
            {
                particleSystem.Stop(false, ParticleSystemStopBehavior.StopEmitting);
            }
        }
     
        private static ParticleSystemSnapshot SaveSnapshotInternal(this ParticleSystem particleSystem)
        {
            var playbackState = particleSystem.GetPlaybackState();
            var particles = new ParticleSystem.Particle[particleSystem.particleCount];
            particleSystem.GetParticles(particles);
            var trails = particleSystem.GetTrails();
            return new ParticleSystemSnapshot
            {
                playbackState = playbackState,
                particles = particles,
                trails = trails,
                isEmitting = particleSystem.isEmitting,
                isPlaying = particleSystem.isPlaying,
                isPaused = particleSystem.isPaused,
                isStopped = particleSystem.isStopped,
            };
        }
     
        /// <summary>
        /// A snapshot of a point in time for a given particle system
        /// </summary>
        public struct ParticleSystemSnapshot
        {
            /// <summary>
            /// The playback state of the particle system snapshot
            /// </summary>
            public ParticleSystem.PlaybackState playbackState;
            /// <summary>
            /// The particles of the particle system snapshot
            /// </summary>
            public ParticleSystem.Particle[] particles;
            /// <summary>
            /// The trails of the particle system snapshot
            /// </summary>
            public ParticleSystem.Trails trails;
            /// <summary>
            /// Is the particle system emitting particles. See <see cref="ParticleSystem.isEmitting"/>
            /// </summary>
            public bool isEmitting;
            /// <summary>
            /// Is the particle system playing. See <see cref="ParticleSystem.isPlaying"/>
            /// </summary>
            public bool isPlaying;
            /// <summary>
            /// Is the particle system paused. See <see cref="ParticleSystem.isPaused"/>
            /// </summary>
            public bool isPaused;
            /// <summary>
            /// Is the particle system stopped. See <see cref="ParticleSystem.isStopped"/>
            /// </summary>
            public bool isStopped;
        }
    }
}

The code works fine on Unity 2020.3.12f1 but once I upgraded to Unity 2020.3.46f1 I ran into this issue. Another important change is that I did start targeting Android version 31 once I updated Unity (the reason I updated to begin with).

That said I wonder if this bug is occurring as a result of this fix?

Finally to give some context I use my extensions to save a my “particle snapshot” on one physics 2d scene and restore the “particle snapshot” when the object is moved into another physics 2d scene.

The strange part (and why I think it’s a bug) is because it will work fine sometimes and crash the game seemingly randomly other times.

From what I can tell I’m using the API correctly, but perhaps someone can shed light on if I’m doing something that would produce this error.

2

So after some investigation this looks to only be occurring on Android.

Also, after I cleared the app cache and data it looks like the bug has disappeared. However, it is possible the bug just hasn’t manifested again yet.

I wonder if some Unity / Android expert could chime in here and shed some light on if clearing the app cache / data could have fixed the bug. I have had instances where an old cache has manifested issues. Which is why I ask.

Thanks for any help in advance!

3

I was wrong about this only occuring on Android. The bug is now appearing on iOS as well. Here are the logs below.

# Crashlytics - Stack trace
# Application: com.breakstepstudios.commandcenterearth
# Platform: apple
# Version: 2.0.2 (55)
# Issue: 3d54a001d269d52bb25edb73a9d4f1df
# Session: 561227cd15f84ad484b158d4da6da1a7_DNE_0_v2
# Date: Wed May 03 2023 15:22:01 GMT-0700 (Pacific Daylight Time)

com.apple.main-thread
0  libsystem_kernel.dylib         0xd24 semaphore_wait_trap + 8
1  libdispatch.dylib              0x4524 _dispatch_sema4_wait + 28
2  libdispatch.dylib              0x4bd8 _dispatch_semaphore_wait_slow + 132
3  UnityFramework                 0xef5150 UnityClassic::Baselib_SystemSemaphore_Acquire(UnityClassic::Baselib_SystemSemaphore_Handle) + 36 (Baselib_SystemSemaphore_DarwinApi.inl.h:36)
4  UnityFramework                 0x9b1408 JobQueue::WaitForJobGroupID(JobGroupID, JobQueue::JobQueueWorkStealMode) + 1841 (JobQueue.cpp:1841)
5  UnityFramework                 0x9aee74 CompleteFenceInternal(JobFence&, WorkStealMode) + 17 (Jobs.cpp:17)
6  UnityFramework                 0x6d92e8 ParticleSystemManager::ClearAllFences(bool) + 848428 (ParticleSystem.cpp:848428)
7  UnityFramework                 0x6d8fd8 ParticleSystem::SyncJobs(bool) + 661 (ParticleSystem.cpp:661)
8  UnityFramework                 0x6d8ebc ParticleSystem::smile:eactivate(DeactivateOperation) + 1914 (ParticleSystem.cpp:1914)
9  UnityFramework                 0x861f04 GameObject::ActivateAwakeRecursivelyInternal(DeactivateOperation, AwakeFromLoadQueue&) + 198 (GameObject.cpp:198)
10 UnityFramework                 0x861e8c GameObject::ActivateAwakeRecursivelyInternal(DeactivateOperation, AwakeFromLoadQueue&) + 191 (GameObject.cpp:191)
11 UnityFramework                 0x861e8c GameObject::ActivateAwakeRecursivelyInternal(DeactivateOperation, AwakeFromLoadQueue&) + 191 (GameObject.cpp:191)
12 UnityFramework                 0x861e8c GameObject::ActivateAwakeRecursivelyInternal(DeactivateOperation, AwakeFromLoadQueue&) + 191 (GameObject.cpp:191)
13 UnityFramework                 0x861e8c GameObject::ActivateAwakeRecursivelyInternal(DeactivateOperation, AwakeFromLoadQueue&) + 191 (GameObject.cpp:191)
14 UnityFramework                 0x861fac GameObject::ActivateAwakeRecursively(DeactivateOperation) + 225 (GameObject.cpp:225)
15 UnityFramework                 0x9e8124 UnityScene::HandleChangingPhysicsScenes(GameObject&, UnityScene*, UnityScene*) + 574 (UnityScene.cpp:574)
16 UnityFramework                 0x9e7704 UnityScene::OnGameObjectChangedScene(GameObject&, UnityScene*, UnityScene*) + 322 (UnityScene.cpp:322)
17 UnityFramework                 0xb365a4 SceneManager_CUSTOM_MoveGameObjectToScene_Injected(ScriptingBackendNativeObjectPtrOpaque*, int const&) + 65 (ScriptingNativeTypes.h:65)
18 UnityFramework                 0x2f94564 selector_thread(void*) (.cold.1) + 4524705124
19 UnityFramework                 0x1486628 selector_thread(void*) (.cold.1) + 4496336424
20 UnityFramework                 0x25c2274 selector_thread(void*) (.cold.1) + 4514407028
21 UnityFramework                 0x25e7510 selector_thread(void*) (.cold.1) + 4514559248
22 UnityFramework                 0x25c0650 selector_thread(void*) (.cold.1) + 4514399824
23 UnityFramework                 0x25b6eec selector_thread(void*) (.cold.1) + 4514361068
24 UnityFramework                 0x25c09c4 selector_thread(void*) (.cold.1) + 4514400708
25 UnityFramework                 0x25c07e4 selector_thread(void*) (.cold.1) + 4514400228
26 UnityFramework                 0x153c2f8 selector_thread(void*) (.cold.1) + 4497081080
27 UnityFramework                 0x152e3fc selector_thread(void*) (.cold.1) + 4497023996
28 UnityFramework                 0x152e0d4 selector_thread(void*) (.cold.1) + 4497023188
29 UnityFramework                 0x153c0b4 selector_thread(void*) (.cold.1) + 4497080500
30 UnityFramework                 0x153d1f8 selector_thread(void*) (.cold.1) + 4497084920
31 UnityFramework                 0x1541b74 selector_thread(void*) (.cold.1) + 4497103732
32 UnityFramework                 0x11308c RuntimeInvoker_TrueVoid_t700C6383A2A510C2CF4DD86DABD5CA9FF70ADAC5(void (*)(), MethodInfo const*, void*, void**) + 4475941004 (Il2CppInvokerTable.cpp:4475941004)
33 UnityFramework                 0x1306fcc il2cpp::vm::Runtime::Invoke(MethodInfo const*, void*, void**, Il2CppException**) + 564 (Runtime.cpp:564)
34 UnityFramework                 0xaa91f0 scripting_method_invoke(ScriptingMethodPtr, ScriptingObjectPtr, ScriptingArguments&, ScriptingExceptionPtr*, bool) + 292 (ScriptingApi_Il2Cpp.cpp:292)
35 UnityFramework                 0xaad120 ScriptingInvocation::Invoke(ScriptingExceptionPtr*, bool) + 273 (ScriptingInvocation.cpp:273)
36 UnityFramework                 0xac3c2c MonoBehaviour::CallUpdateMethod(int) + 534 (MonoBehaviour.cpp:534)
37 UnityFramework                 0x8f5b04 void BaseBehaviourManager::CommonUpdate<FixedBehaviourManager>() + 195 (Behaviour.cpp:195)
38 UnityFramework                 0x9cf3f0 ExecutePlayerLoop(NativePlayerLoopSystem*) + 383 (PlayerLoop.cpp:383)
39 UnityFramework                 0x9cf430 ExecutePlayerLoop(NativePlayerLoopSystem*) + 407 (PlayerLoop.cpp:407)
40 UnityFramework                 0x9cf6fc PlayerLoop() + 514 (PlayerLoop.cpp:514)
41 UnityFramework                 0xe2f918 UnityPlayerLoopImpl(bool) + 328 (LibEntryPoint.mm:328)
42 UnityFramework                 0x169f0 -[UnityAppController(Rendering) repaint] + 233 (UnityAppController+Rendering.mm:233)
43 UnityFramework                 0x16980 -[UnityAppController(Rendering) repaintDisplayLink] + 72 (UnityAppController+Rendering.mm:72)
44 QuartzCore                     0x28ca4 CA::smile:isplay::smile:isplayLink::dispatch_items(unsigned long long, unsigned long long, unsigned long long) + 820
45 QuartzCore                     0x156144 CA::smile:isplay::smile:isplayLink::dispatch_deferred_display_links(unsigned int) + 380
46 UIKitCore                      0x6525b0 _UIUpdateSequenceRun + 84
47 UIKitCore                      0xca1310 schedulerStepScheduledMainSection + 172
48 UIKitCore                      0xca04dc runloopSourceCallback + 92
49 CoreFoundation                 0xd5f24 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 28
50 CoreFoundation                 0xe22fc __CFRunLoopDoSource0 + 176
51 CoreFoundation                 0x66220 __CFRunLoopDoSources0 + 340
52 CoreFoundation                 0x7bb7c __CFRunLoopRun + 836
53 CoreFoundation                 0x80eb0 CFRunLoopRunSpecific + 612
54 GraphicsServices               0x1368 GSEventRunModal + 164
55 UIKitCore                      0x3a1668 -[UIApplication _run] + 888
56 UIKitCore                      0x3a12cc UIApplicationMain + 340
57 UnityFramework                 0x16524 -[UnityFramework runUIApplicationMainWithArgc:argv:] + 96 (main.mm:96)
58 CommandCenterEarth             0x7ccc main + 28 (main.mm:28)
59 ???                            0x1ec66c960 (Missing)

Thread
0  libsystem_kernel.dylib         0x12b0 __workq_kernreturn + 8
1  libsystem_pthread.dylib        0xe44 _pthread_wqthread + 364
2  libsystem_pthread.dylib        0xb98 start_wqthread + 8

Thread
0  libsystem_pthread.dylib        0xb90 start_wqthread + 254

com.apple.uikit.eventfetch-thread
0  libsystem_kernel.dylib         0xda8 mach_msg2_trap + 8
1  libsystem_kernel.dylib         0x13a1c mach_msg2_internal + 80
2  libsystem_kernel.dylib         0x13c5c mach_msg_overwrite + 388
3  libsystem_kernel.dylib         0x12ec mach_msg + 24
4  CoreFoundation                 0x7aac4 __CFRunLoopServiceMachPort + 160
5  CoreFoundation                 0x7bd08 __CFRunLoopRun + 1232
6  CoreFoundation                 0x80eb0 CFRunLoopRunSpecific + 612
7  Foundation                     0x42054 -[NSRunLoop(NSRunLoop) runMode:beforeDate:] + 212
8  Foundation                     0x41f3c -[NSRunLoop(NSRunLoop) runUntilDate:] + 64
9  UIKitCore                      0x4d66a4 -[UIEventFetcher threadMain] + 436
10 Foundation                     0x5b518 __NSThread__start__ + 716
11 libsystem_pthread.dylib        0x16cc _pthread_start + 148
12 libsystem_pthread.dylib        0xba4 thread_start + 8

GC Finalizer
0  libsystem_kernel.dylib         0x167c __psynch_cvwait + 8
1  libsystem_pthread.dylib        0x806c _pthread_cond_wait + 1232
2  UnityFramework                 0x12cedfc il2cpp::os::posix::PosixWaitObject::Wait(unsigned int, bool) + 120 (PosixWaitObject.cpp:120)
3  UnityFramework                 0x12a1bf0 il2cpp::gc::FinalizerThread(void*) + 438 (BoehmGC.cpp:438)
4  UnityFramework                 0x12c5d30 il2cpp::os::Thread::RunWrapper(void*) + 183 (Thread.cpp:183)
5  UnityFramework                 0x12c7fe0 il2cpp::os::ThreadImpl::ThreadStartWrapper(void*) + 127 (ThreadImpl.cpp:127)
6  libsystem_pthread.dylib        0x16cc _pthread_start + 148
7  libsystem_pthread.dylib        0xba4 thread_start + 8

Job.Worker 0
0  libsystem_kernel.dylib         0xd24 semaphore_wait_trap + 8
1  libdispatch.dylib              0x4524 _dispatch_sema4_wait + 28
2  libdispatch.dylib              0x4bd8 _dispatch_semaphore_wait_slow + 132
3  UnityFramework                 0xef5150 UnityClassic::Baselib_SystemSemaphore_Acquire(UnityClassic::Baselib_SystemSemaphore_Handle) + 36 (Baselib_SystemSemaphore_DarwinApi.inl.h:36)
4  UnityFramework                 0x9b0708 JobQueue::ProcessJobs(JobQueue::ThreadInfo*, void*) + 33 (Baselib_CappedSemaphore_SemaphoreBased.inl.h:33)
5  UnityFramework                 0x9af920 JobQueue::WorkLoop(void*) + 1103 (JobQueue.cpp:1103)
6  UnityFramework                 0xa510c0 Thread::RunThreadWrapper(void*) + 81 (Thread.cpp:81)
7  libsystem_pthread.dylib        0x16cc _pthread_start + 148
8  libsystem_pthread.dylib        0xba4 thread_start + 8

Job.Worker 1
0  libsystem_kernel.dylib         0xd24 semaphore_wait_trap + 8
1  libdispatch.dylib              0x4524 _dispatch_sema4_wait + 28
2  libdispatch.dylib              0x4bd8 _dispatch_semaphore_wait_slow + 132
3  UnityFramework                 0xef5150 UnityClassic::Baselib_SystemSemaphore_Acquire(UnityClassic::Baselib_SystemSemaphore_Handle) + 36 (Baselib_SystemSemaphore_DarwinApi.inl.h:36)
4  UnityFramework                 0x9b0708 JobQueue::ProcessJobs(JobQueue::ThreadInfo*, void*) + 33 (Baselib_CappedSemaphore_SemaphoreBased.inl.h:33)
5  UnityFramework                 0x9af920 JobQueue::WorkLoop(void*) + 1103 (JobQueue.cpp:1103)
6  UnityFramework                 0xa510c0 Thread::RunThreadWrapper(void*) + 81 (Thread.cpp:81)
7  libsystem_pthread.dylib        0x16cc _pthread_start + 148
8  libsystem_pthread.dylib        0xba4 thread_start + 8

Job.Worker 2
0  libsystem_kernel.dylib         0xd24 semaphore_wait_trap + 8
1  libdispatch.dylib              0x4524 _dispatch_sema4_wait + 28
2  libdispatch.dylib              0x4bd8 _dispatch_semaphore_wait_slow + 132
3  UnityFramework                 0xef5150 UnityClassic::Baselib_SystemSemaphore_Acquire(UnityClassic::Baselib_SystemSemaphore_Handle) + 36 (Baselib_SystemSemaphore_DarwinApi.inl.h:36)
4  UnityFramework                 0x9b0708 JobQueue::ProcessJobs(JobQueue::ThreadInfo*, void*) + 33 (Baselib_CappedSemaphore_SemaphoreBased.inl.h:33)
5  UnityFramework                 0x9af920 JobQueue::WorkLoop(void*) + 1103 (JobQueue.cpp:1103)
6  UnityFramework                 0xa510c0 Thread::RunThreadWrapper(void*) + 81 (Thread.cpp:81)
7  libsystem_pthread.dylib        0x16cc _pthread_start + 148
8  libsystem_pthread.dylib        0xba4 thread_start + 8

Job.Worker 3
0  libsystem_kernel.dylib         0xd24 semaphore_wait_trap + 8
1  libdispatch.dylib              0x4524 _dispatch_sema4_wait + 28
2  libdispatch.dylib              0x4bd8 _dispatch_semaphore_wait_slow + 132
3  UnityFramework                 0xef5150 UnityClassic::Baselib_SystemSemaphore_Acquire(UnityClassic::Baselib_SystemSemaphore_Handle) + 36 (Baselib_SystemSemaphore_DarwinApi.inl.h:36)
4  UnityFramework                 0x9b0708 JobQueue::ProcessJobs(JobQueue::ThreadInfo*, void*) + 33 (Baselib_CappedSemaphore_SemaphoreBased.inl.h:33)
5  UnityFramework                 0x9af920 JobQueue::WorkLoop(void*) + 1103 (JobQueue.cpp:1103)
6  UnityFramework                 0xa510c0 Thread::RunThreadWrapper(void*) + 81 (Thread.cpp:81)
7  libsystem_pthread.dylib        0x16cc _pthread_start + 148
8  libsystem_pthread.dylib        0xba4 thread_start + 8

Job.Worker 4
0  libsystem_kernel.dylib         0xd24 semaphore_wait_trap + 8
1  libdispatch.dylib              0x4524 _dispatch_sema4_wait + 28
2  libdispatch.dylib              0x4bd8 _dispatch_semaphore_wait_slow + 132
3  UnityFramework                 0xef5150 UnityClassic::Baselib_SystemSemaphore_Acquire(UnityClassic::Baselib_SystemSemaphore_Handle) + 36 (Baselib_SystemSemaphore_DarwinApi.inl.h:36)
4  UnityFramework                 0x9b0708 JobQueue::ProcessJobs(JobQueue::ThreadInfo*, void*) + 33 (Baselib_CappedSemaphore_SemaphoreBased.inl.h:33)
5  UnityFramework                 0x9af920 JobQueue::WorkLoop(void*) + 1103 (JobQueue.cpp:1103)
6  UnityFramework                 0xa510c0 Thread::RunThreadWrapper(void*) + 81 (Thread.cpp:81)
7  libsystem_pthread.dylib        0x16cc _pthread_start + 148
8  libsystem_pthread.dylib        0xba4 thread_start + 8

Background Job.Worker 0
0  libsystem_kernel.dylib         0xd24 semaphore_wait_trap + 8
1  libdispatch.dylib              0x4524 _dispatch_sema4_wait + 28
2  libdispatch.dylib              0x4bd8 _dispatch_semaphore_wait_slow + 132
3  UnityFramework                 0xef5150 UnityClassic::Baselib_SystemSemaphore_Acquire(UnityClassic::Baselib_SystemSemaphore_Handle) + 36 (Baselib_SystemSemaphore_DarwinApi.inl.h:36)
4  UnityFramework                 0x9b0708 JobQueue::ProcessJobs(JobQueue::ThreadInfo*, void*) + 33 (Baselib_CappedSemaphore_SemaphoreBased.inl.h:33)
5  UnityFramework                 0x9af920 JobQueue::WorkLoop(void*) + 1103 (JobQueue.cpp:1103)
6  UnityFramework                 0xa510c0 Thread::RunThreadWrapper(void*) + 81 (Thread.cpp:81)
7  libsystem_pthread.dylib        0x16cc _pthread_start + 148
8  libsystem_pthread.dylib        0xba4 thread_start + 8

Background Job.Worker 1
0  libsystem_kernel.dylib         0xd24 semaphore_wait_trap + 8
1  libdispatch.dylib              0x4524 _dispatch_sema4_wait + 28
2  libdispatch.dylib              0x4bd8 _dispatch_semaphore_wait_slow + 132
3  UnityFramework                 0xef5150 UnityClassic::Baselib_SystemSemaphore_Acquire(UnityClassic::Baselib_SystemSemaphore_Handle) + 36 (Baselib_SystemSemaphore_DarwinApi.inl.h:36)
4  UnityFramework                 0x9b0708 JobQueue::ProcessJobs(JobQueue::ThreadInfo*, void*) + 33 (Baselib_CappedSemaphore_SemaphoreBased.inl.h:33)
5  UnityFramework                 0x9af920 JobQueue::WorkLoop(void*) + 1103 (JobQueue.cpp:1103)
6  UnityFramework                 0xa510c0 Thread::RunThreadWrapper(void*) + 81 (Thread.cpp:81)
7  libsystem_pthread.dylib        0x16cc _pthread_start + 148
8  libsystem_pthread.dylib        0xba4 thread_start + 8

Background Job.Worker 2
0  libsystem_kernel.dylib         0xd24 semaphore_wait_trap + 8
1  libdispatch.dylib              0x4524 _dispatch_sema4_wait + 28
2  libdispatch.dylib              0x4bd8 _dispatch_semaphore_wait_slow + 132
3  UnityFramework                 0xef5150 UnityClassic::Baselib_SystemSemaphore_Acquire(UnityClassic::Baselib_SystemSemaphore_Handle) + 36 (Baselib_SystemSemaphore_DarwinApi.inl.h:36)
4  UnityFramework                 0x9b0708 JobQueue::ProcessJobs(JobQueue::ThreadInfo*, void*) + 33 (Baselib_CappedSemaphore_SemaphoreBased.inl.h:33)
5  UnityFramework                 0x9af920 JobQueue::WorkLoop(void*) + 1103 (JobQueue.cpp:1103)
6  UnityFramework                 0xa510c0 Thread::RunThreadWrapper(void*) + 81 (Thread.cpp:81)
7  libsystem_pthread.dylib        0x16cc _pthread_start + 148
8  libsystem_pthread.dylib        0xba4 thread_start + 8

Background Job.Worker 3
0  libsystem_kernel.dylib         0xd24 semaphore_wait_trap + 8
1  libdispatch.dylib              0x4524 _dispatch_sema4_wait + 28
2  libdispatch.dylib              0x4bd8 _dispatch_semaphore_wait_slow + 132
3  UnityFramework                 0xef5150 UnityClassic::Baselib_SystemSemaphore_Acquire(UnityClassic::Baselib_SystemSemaphore_Handle) + 36 (Baselib_SystemSemaphore_DarwinApi.inl.h:36)
4  UnityFramework                 0x9b0708 JobQueue::ProcessJobs(JobQueue::ThreadInfo*, void*) + 33 (Baselib_CappedSemaphore_SemaphoreBased.inl.h:33)
5  UnityFramework                 0x9af920 JobQueue::WorkLoop(void*) + 1103 (JobQueue.cpp:1103)
6  UnityFramework                 0xa510c0 Thread::RunThreadWrapper(void*) + 81 (Thread.cpp:81)
7  libsystem_pthread.dylib        0x16cc _pthread_start + 148
8  libsystem_pthread.dylib        0xba4 thread_start + 8

Background Job.Worker 4
0  libsystem_kernel.dylib         0xd24 semaphore_wait_trap + 8
1  libdispatch.dylib              0x4524 _dispatch_sema4_wait + 28
2  libdispatch.dylib              0x4bd8 _dispatch_semaphore_wait_slow + 132
3  UnityFramework                 0xef5150 UnityClassic::Baselib_SystemSemaphore_Acquire(UnityClassic::Baselib_SystemSemaphore_Handle) + 36 (Baselib_SystemSemaphore_DarwinApi.inl.h:36)
4  UnityFramework                 0x9b0708 JobQueue::ProcessJobs(JobQueue::ThreadInfo*, void*) + 33 (Baselib_CappedSemaphore_SemaphoreBased.inl.h:33)
5  UnityFramework                 0x9af920 JobQueue::WorkLoop(void*) + 1103 (JobQueue.cpp:1103)
6  UnityFramework                 0xa510c0 Thread::RunThreadWrapper(void*) + 81 (Thread.cpp:81)
7  libsystem_pthread.dylib        0x16cc _pthread_start + 148
8  libsystem_pthread.dylib        0xba4 thread_start + 8

Background Job.Worker 5
0  libsystem_kernel.dylib         0xd24 semaphore_wait_trap + 8
1  libdispatch.dylib              0x4524 _dispatch_sema4_wait + 28
2  libdispatch.dylib              0x4bd8 _dispatch_semaphore_wait_slow + 132
3  UnityFramework                 0xef5150 UnityClassic::Baselib_SystemSemaphore_Acquire(UnityClassic::Baselib_SystemSemaphore_Handle) + 36 (Baselib_SystemSemaphore_DarwinApi.inl.h:36)
4  UnityFramework                 0x9b0708 JobQueue::ProcessJobs(JobQueue::ThreadInfo*, void*) + 33 (Baselib_CappedSemaphore_SemaphoreBased.inl.h:33)
5  UnityFramework                 0x9af920 JobQueue::WorkLoop(void*) + 1103 (JobQueue.cpp:1103)
6  UnityFramework                 0xa510c0 Thread::RunThreadWrapper(void*) + 81 (Thread.cpp:81)
7  libsystem_pthread.dylib        0x16cc _pthread_start + 148
8  libsystem_pthread.dylib        0xba4 thread_start + 8

Background Job.Worker 6
0  libsystem_kernel.dylib         0xd24 semaphore_wait_trap + 8
1  libdispatch.dylib              0x4524 _dispatch_sema4_wait + 28
2  libdispatch.dylib              0x4bd8 _dispatch_semaphore_wait_slow + 132
3  UnityFramework                 0xef5150 UnityClassic::Baselib_SystemSemaphore_Acquire(UnityClassic::Baselib_SystemSemaphore_Handle) + 36 (Baselib_SystemSemaphore_DarwinApi.inl.h:36)
4  UnityFramework                 0x9b0708 JobQueue::ProcessJobs(JobQueue::ThreadInfo*, void*) + 33 (Baselib_CappedSemaphore_SemaphoreBased.inl.h:33)
5  UnityFramework                 0x9af920 JobQueue::WorkLoop(void*) + 1103 (JobQueue.cpp:1103)
6  UnityFramework                 0xa510c0 Thread::RunThreadWrapper(void*) + 81 (Thread.cpp:81)
7  libsystem_pthread.dylib        0x16cc _pthread_start + 148
8  libsystem_pthread.dylib        0xba4 thread_start + 8

Background Job.Worker 7
0  libsystem_kernel.dylib         0xd24 semaphore_wait_trap + 8
1  libdispatch.dylib              0x4524 _dispatch_sema4_wait + 28
2  libdispatch.dylib              0x4bd8 _dispatch_semaphore_wait_slow + 132
3  UnityFramework                 0xef5150 UnityClassic::Baselib_SystemSemaphore_Acquire(UnityClassic::Baselib_SystemSemaphore_Handle) + 36 (Baselib_SystemSemaphore_DarwinApi.inl.h:36)
4  UnityFramework                 0x9b0708 JobQueue::ProcessJobs(JobQueue::ThreadInfo*, void*) + 33 (Baselib_CappedSemaphore_SemaphoreBased.inl.h:33)
5  UnityFramework                 0x9af920 JobQueue::WorkLoop(void*) + 1103 (JobQueue.cpp:1103)
6  UnityFramework                 0xa510c0 Thread::RunThreadWrapper(void*) + 81 (Thread.cpp:81)
7  libsystem_pthread.dylib        0x16cc _pthread_start + 148
8  libsystem_pthread.dylib        0xba4 thread_start + 8

Background Job.Worker 8
0  libsystem_kernel.dylib         0xd24 semaphore_wait_trap + 8
1  libdispatch.dylib              0x4524 _dispatch_sema4_wait + 28
2  libdispatch.dylib              0x4bd8 _dispatch_semaphore_wait_slow + 132
3  UnityFramework                 0xef5150 UnityClassic::Baselib_SystemSemaphore_Acquire(UnityClassic::Baselib_SystemSemaphore_Handle) + 36 (Baselib_SystemSemaphore_DarwinApi.inl.h:36)
4  UnityFramework                 0x9b0708 JobQueue::ProcessJobs(JobQueue::ThreadInfo*, void*) + 33 (Baselib_CappedSemaphore_SemaphoreBased.inl.h:33)
5  UnityFramework                 0x9af920 JobQueue::WorkLoop(void*) + 1103 (JobQueue.cpp:1103)
6  UnityFramework                 0xa510c0 Thread::RunThreadWrapper(void*) + 81 (Thread.cpp:81)
7  libsystem_pthread.dylib        0x16cc _pthread_start + 148
8  libsystem_pthread.dylib        0xba4 thread_start + 8

Background Job.Worker 9
0  libsystem_kernel.dylib         0xd24 semaphore_wait_trap + 8
1  libdispatch.dylib              0x4524 _dispatch_sema4_wait + 28
2  libdispatch.dylib              0x4bd8 _dispatch_semaphore_wait_slow + 132
3  UnityFramework                 0xef5150 UnityClassic::Baselib_SystemSemaphore_Acquire(UnityClassic::Baselib_SystemSemaphore_Handle) + 36 (Baselib_SystemSemaphore_DarwinApi.inl.h:36)
4  UnityFramework                 0x9b0708 JobQueue::ProcessJobs(JobQueue::ThreadInfo*, void*) + 33 (Baselib_CappedSemaphore_SemaphoreBased.inl.h:33)
5  UnityFramework                 0x9af920 JobQueue::WorkLoop(void*) + 1103 (JobQueue.cpp:1103)
6  UnityFramework                 0xa510c0 Thread::RunThreadWrapper(void*) + 81 (Thread.cpp:81)
7  libsystem_pthread.dylib        0x16cc _pthread_start + 148
8  libsystem_pthread.dylib        0xba4 thread_start + 8

Background Job.Worker 10
0  libsystem_kernel.dylib         0xd24 semaphore_wait_trap + 8
1  libdispatch.dylib              0x4524 _dispatch_sema4_wait + 28
2  libdispatch.dylib              0x4bd8 _dispatch_semaphore_wait_slow + 132
3  UnityFramework                 0xef5150 UnityClassic::Baselib_SystemSemaphore_Acquire(UnityClassic::Baselib_SystemSemaphore_Handle) + 36 (Baselib_SystemSemaphore_DarwinApi.inl.h:36)
4  UnityFramework                 0x9b0708 JobQueue::ProcessJobs(JobQueue::ThreadInfo*, void*) + 33 (Baselib_CappedSemaphore_SemaphoreBased.inl.h:33)
5  UnityFramework                 0x9af920 JobQueue::WorkLoop(void*) + 1103 (JobQueue.cpp:1103)
6  UnityFramework                 0xa510c0 Thread::RunThreadWrapper(void*) + 81 (Thread.cpp:81)
7  libsystem_pthread.dylib        0x16cc _pthread_start + 148
8  libsystem_pthread.dylib        0xba4 thread_start + 8

Background Job.Worker 11
0  libsystem_kernel.dylib         0xd24 semaphore_wait_trap + 8
1  libdispatch.dylib              0x4524 _dispatch_sema4_wait + 28
2  libdispatch.dylib              0x4bd8 _dispatch_semaphore_wait_slow + 132
3  UnityFramework                 0xef5150 UnityClassic::Baselib_SystemSemaphore_Acquire(UnityClassic::Baselib_SystemSemaphore_Handle) + 36 (Baselib_SystemSemaphore_DarwinApi.inl.h:36)
4  UnityFramework                 0x9b0708 JobQueue::ProcessJobs(JobQueue::ThreadInfo*, void*) + 33 (Baselib_CappedSemaphore_SemaphoreBased.inl.h:33)
5  UnityFramework                 0x9af920 JobQueue::WorkLoop(void*) + 1103 (JobQueue.cpp:1103)
6  UnityFramework                 0xa510c0 Thread::RunThreadWrapper(void*) + 81 (Thread.cpp:81)
7  libsystem_pthread.dylib        0x16cc _pthread_start + 148
8  libsystem_pthread.dylib        0xba4 thread_start + 8

Background Job.Worker 12
0  libsystem_kernel.dylib         0xd24 semaphore_wait_trap + 8
1  libdispatch.dylib              0x4524 _dispatch_sema4_wait + 28
2  libdispatch.dylib              0x4bd8 _dispatch_semaphore_wait_slow + 132
3  UnityFramework                 0xef5150 UnityClassic::Baselib_SystemSemaphore_Acquire(UnityClassic::Baselib_SystemSemaphore_Handle) + 36 (Baselib_SystemSemaphore_DarwinApi.inl.h:36)
4  UnityFramework                 0x9b0708 JobQueue::ProcessJobs(JobQueue::ThreadInfo*, void*) + 33 (Baselib_CappedSemaphore_SemaphoreBased.inl.h:33)
5  UnityFramework                 0x9af920 JobQueue::WorkLoop(void*) + 1103 (JobQueue.cpp:1103)
6  UnityFramework                 0xa510c0 Thread::RunThreadWrapper(void*) + 81 (Thread.cpp:81)
7  libsystem_pthread.dylib        0x16cc _pthread_start + 148
8  libsystem_pthread.dylib        0xba4 thread_start + 8

Background Job.Worker 13
0  libsystem_kernel.dylib         0xd24 semaphore_wait_trap + 8
1  libdispatch.dylib              0x4524 _dispatch_sema4_wait + 28
2  libdispatch.dylib              0x4bd8 _dispatch_semaphore_wait_slow + 132
3  UnityFramework                 0xef5150 UnityClassic::Baselib_SystemSemaphore_Acquire(UnityClassic::Baselib_SystemSemaphore_Handle) + 36 (Baselib_SystemSemaphore_DarwinApi.inl.h:36)
4  UnityFramework                 0x9b0708 JobQueue::ProcessJobs(JobQueue::ThreadInfo*, void*) + 33 (Baselib_CappedSemaphore_SemaphoreBased.inl.h:33)
5  UnityFramework                 0x9af920 JobQueue::WorkLoop(void*) + 1103 (JobQueue.cpp:1103)
6  UnityFramework                 0xa510c0 Thread::RunThreadWrapper(void*) + 81 (Thread.cpp:81)
7  libsystem_pthread.dylib        0x16cc _pthread_start + 148
8  libsystem_pthread.dylib        0xba4 thread_start + 8

Background Job.Worker 14
0  libsystem_kernel.dylib         0xd24 semaphore_wait_trap + 8
1  libdispatch.dylib              0x4524 _dispatch_sema4_wait + 28
2  libdispatch.dylib              0x4bd8 _dispatch_semaphore_wait_slow + 132
3  UnityFramework                 0xef5150 UnityClassic::Baselib_SystemSemaphore_Acquire(UnityClassic::Baselib_SystemSemaphore_Handle) + 36 (Baselib_SystemSemaphore_DarwinApi.inl.h:36)
4  UnityFramework                 0x9b0708 JobQueue::ProcessJobs(JobQueue::ThreadInfo*, void*) + 33 (Baselib_CappedSemaphore_SemaphoreBased.inl.h:33)
5  UnityFramework                 0x9af920 JobQueue::WorkLoop(void*) + 1103 (JobQueue.cpp:1103)
6  UnityFramework                 0xa510c0 Thread::RunThreadWrapper(void*) + 81 (Thread.cpp:81)
7  libsystem_pthread.dylib        0x16cc _pthread_start + 148
8  libsystem_pthread.dylib        0xba4 thread_start + 8

Background Job.Worker 15
0  libsystem_kernel.dylib         0xd24 semaphore_wait_trap + 8
1  libdispatch.dylib              0x4524 _dispatch_sema4_wait + 28
2  libdispatch.dylib              0x4bd8 _dispatch_semaphore_wait_slow + 132
3  UnityFramework                 0xef5150 UnityClassic::Baselib_SystemSemaphore_Acquire(UnityClassic::Baselib_SystemSemaphore_Handle) + 36 (Baselib_SystemSemaphore_DarwinApi.inl.h:36)
4  UnityFramework                 0x9b0708 JobQueue::ProcessJobs(JobQueue::ThreadInfo*, void*) + 33 (Baselib_CappedSemaphore_SemaphoreBased.inl.h:33)
5  UnityFramework                 0x9af920 JobQueue::WorkLoop(void*) + 1103 (JobQueue.cpp:1103)
6  UnityFramework                 0xa510c0 Thread::RunThreadWrapper(void*) + 81 (Thread.cpp:81)
7  libsystem_pthread.dylib        0x16cc _pthread_start + 148
8  libsystem_pthread.dylib        0xba4 thread_start + 8

BatchDeleteObjects
0  libsystem_kernel.dylib         0xd24 semaphore_wait_trap + 8
1  libdispatch.dylib              0x4524 _dispatch_sema4_wait + 28
2  libdispatch.dylib              0x4bd8 _dispatch_semaphore_wait_slow + 132
3  UnityFramework                 0xef5150 UnityClassic::Baselib_SystemSemaphore_Acquire(UnityClassic::Baselib_SystemSemaphore_Handle) + 36 (Baselib_SystemSemaphore_DarwinApi.inl.h:36)
4  UnityFramework                 0xa526d0 ThreadedStreamBuffer::HandleOutOfBufferToReadFrom(ThreadedStreamBuffer::smile:ataOffsets) + 41 (Baselib_Semaphore_SemaphoreBased.inl.h:41)
5  UnityFramework                 0x9cd80c BatchDeleteStep2Threaded(void*) + 93 (BatchDeleteObjects.cpp:93)
6  UnityFramework                 0xa510c0 Thread::RunThreadWrapper(void*) + 81 (Thread.cpp:81)
7  libsystem_pthread.dylib        0x16cc _pthread_start + 148
8  libsystem_pthread.dylib        0xba4 thread_start + 8

Loading.AsyncRead
0  libsystem_kernel.dylib         0xd24 semaphore_wait_trap + 8
1  libdispatch.dylib              0x4524 _dispatch_sema4_wait + 28
2  libdispatch.dylib              0x4bd8 _dispatch_semaphore_wait_slow + 132
3  UnityFramework                 0xef5150 UnityClassic::Baselib_SystemSemaphore_Acquire(UnityClassic::Baselib_SystemSemaphore_Handle) + 36 (Baselib_SystemSemaphore_DarwinApi.inl.h:36)
4  UnityFramework                 0x8f146c AsyncReadManagerThreaded::ThreadEntry() + 41 (Baselib_Semaphore_SemaphoreBased.inl.h:41)
5  UnityFramework                 0x8f0fc4 AsyncReadManagerThreaded::StaticThreadEntry(void*) + 120 (AsyncReadManagerThreaded.cpp:120)
6  UnityFramework                 0xa510c0 Thread::RunThreadWrapper(void*) + 81 (Thread.cpp:81)
7  libsystem_pthread.dylib        0x16cc _pthread_start + 148
8  libsystem_pthread.dylib        0xba4 thread_start + 8

Thread
0  libsystem_pthread.dylib        0xb90 start_wqthread + 254

Crashed: UnityGfxDeviceWorker
0  UnityFramework                 0x6d600c ParticleSystemParticles::CopyToArrayAOS(ParticleSystemParticle*, int, int) const + 427 (ParticleSystemParticle.cpp:427)
1  UnityFramework                 0xcd1b8c ParticleSystemTrailGeometryJob::ConfigurePerParticleTrailParams(ParticleLineParameters&, ParticleSystemParticles const*, unsigned long, ParticleSystemTrailGeometryJob const&, float) + 3269 (ParticleSystemGeometryJob.cpp:3269)
2  UnityFramework                 0xcd07a0 ParticleSystemTrailGeometryJob::RenderJobCommon(ParticleSystemTrailGeometryJob&, void*, unsigned int) + 3105 (ParticleSystemGeometryJob.cpp:3105)
3  UnityFramework                 0xccfb70 ParticleSystemTrailGeometryJob::RenderJob(SharedGeometryJobData*, unsigned int) + 2991 (ParticleSystemGeometryJob.cpp:2991)
4  UnityFramework                 0x9aff84 JobQueue::Exec(JobInfo*, long long, int, bool) + 621 (JobQueue.cpp:621)
5  UnityFramework                 0x9b0250 JobQueue::Steal(JobGroup*, JobInfo*, long long, int, bool, bool) + 736 (JobQueue.cpp:736)
6  UnityFramework                 0x9b13b4 JobQueue::WaitForJobGroupID(JobGroupID, JobQueue::JobQueueWorkStealMode) + 1758 (JobQueue.cpp:1758)
7  UnityFramework                 0x9aee74 CompleteFenceInternal(JobFence&, WorkStealMode) + 17 (Jobs.cpp:17)
8  UnityFramework                 0xa79354 GeometryJobTasks::PutGeometryJobFence(GfxDevice&, GeometryJobFence) + 282 (Jobs.h:282)
9  UnityFramework                 0xa90254 GfxDevice::PutGeometryJobFence(GeometryJobFence&) + 76 (GeometryJob.h:76)
10 UnityFramework                 0xa902d0 GfxDevice::smile:rawSharedGeometryJobs(DynamicVBOBuffer const&, unsigned int, DynamicVBOBuffer const&, unsigned int, GeometryJobFence, DrawBuffersRange const*, unsigned long, VertexDeclaration*) + 876 (GfxDevice.cpp:876)
11 UnityFramework                 0xd8ba18 GfxDeviceWorker::RunCommand(ThreadedStreamBuffer&) + 776 (GfxDeviceWorker.cpp:776)
12 UnityFramework                 0xdfaad4 GfxDeviceWorkerAutoreleasePoolProxy + 5330 (GfxDeviceMetal.mm:5330)
13 UnityFramework                 0xd90908 GfxDeviceWorker::RunExt(ThreadedStreamBuffer&) + 389 (GfxDeviceWorker.cpp:389)
14 UnityFramework                 0xd8866c GfxDeviceWorker::RunGfxDeviceWorker(void*) + 353 (GfxDeviceWorker.cpp:353)
15 UnityFramework                 0xa510c0 Thread::RunThreadWrapper(void*) + 81 (Thread.cpp:81)
16 libsystem_pthread.dylib        0x16cc _pthread_start + 148
17 libsystem_pthread.dylib        0xba4 thread_start + 8

Thread
0  libsystem_kernel.dylib         0xd24 semaphore_wait_trap + 8
1  UnityFramework                 0x123ab10 FMOD_OS_Semaphore_Wait(FMOD_OS_SEMAPHORE*) + 3399812
2  UnityFramework                 0x12571c8 FMOD::Thread::callback(void*) + 3516220
3  libsystem_pthread.dylib        0x16cc _pthread_start + 148
4  libsystem_pthread.dylib        0xba4 thread_start + 8

AURemoteIO::IOThread
0  libsystem_kernel.dylib         0xda8 mach_msg2_trap + 8
1  libsystem_kernel.dylib         0x13a1c mach_msg2_internal + 80
2  libsystem_kernel.dylib         0x13c5c mach_msg_overwrite + 388
3  libsystem_kernel.dylib         0x12ec mach_msg + 24
4  libEmbeddedSystemAUs.dylib     0xa824c void* caulk::thread_proxy<std::__1::tuple<caulk::thread::attributes, AURemoteIO::IOThread::IOThread(AURemoteIO&, caulk::thread::attributes const&, caulk::mach::os_workgroup_managed const&)::'lambda'(), std::__1::tuple<> > >(void*) + 556
5  libsystem_pthread.dylib        0x16cc _pthread_start + 148
6  libsystem_pthread.dylib        0xba4 thread_start + 8

Thread
0  libsystem_kernel.dylib         0x1268 __semwait_signal + 8
1  libsystem_c.dylib              0x57d8 nanosleep + 220
2  libsystem_c.dylib              0x64a4 usleep + 68
3  UnityFramework                 0x123a6d8 FMOD_OS_Time_Sleep(unsigned int) + 3398732
4  UnityFramework                 0x1257234 FMOD::Thread::callback(void*) + 3516328
5  libsystem_pthread.dylib        0x16cc _pthread_start + 148
6  libsystem_pthread.dylib        0xba4 thread_start + 8

com.apple.CoreMotion.MotionThread
0  libsystem_kernel.dylib         0xda8 mach_msg2_trap + 8
1  libsystem_kernel.dylib         0x13a1c mach_msg2_internal + 80
2  libsystem_kernel.dylib         0x13c5c mach_msg_overwrite + 388
3  libsystem_kernel.dylib         0x12ec mach_msg + 24
4  CoreFoundation                 0x7aac4 __CFRunLoopServiceMachPort + 160
5  CoreFoundation                 0x7bd08 __CFRunLoopRun + 1232
6  CoreFoundation                 0x80eb0 CFRunLoopRunSpecific + 612
7  CoreFoundation                 0xc4cd4 CFRunLoopRun + 64
8  CoreMotion                     0x13ef8 CLMotionActivity::isTypeInVehicle(CLMotionActivity::Type) + 22908
9  libsystem_pthread.dylib        0x16cc _pthread_start + 148
10 libsystem_pthread.dylib        0xba4 thread_start + 8

Loading.PreloadManager
0  libsystem_kernel.dylib         0xd24 semaphore_wait_trap + 8
1  libdispatch.dylib              0x4524 _dispatch_sema4_wait + 28
2  libdispatch.dylib              0x4bd8 _dispatch_semaphore_wait_slow + 132
3  UnityFramework                 0xef5150 UnityClassic::Baselib_SystemSemaphore_Acquire(UnityClassic::Baselib_SystemSemaphore_Handle) + 36 (Baselib_SystemSemaphore_DarwinApi.inl.h:36)
4  UnityFramework                 0x9dd0dc PreloadManager::Run() + 41 (Baselib_Semaphore_SemaphoreBased.inl.h:41)
5  UnityFramework                 0x9dd028 PreloadManager::Run(void*) + 183 (PreloadManager.cpp:183)
6  UnityFramework                 0xa510c0 Thread::RunThreadWrapper(void*) + 81 (Thread.cpp:81)
7  libsystem_pthread.dylib        0x16cc _pthread_start + 148
8  libsystem_pthread.dylib        0xba4 thread_start + 8

CloudJob.Worker 0
0  libsystem_kernel.dylib         0xd24 semaphore_wait_trap + 8
1  libdispatch.dylib              0x4524 _dispatch_sema4_wait + 28
2  libdispatch.dylib              0x4bd8 _dispatch_semaphore_wait_slow + 132
3  UnityFramework                 0xef5150 UnityClassic::Baselib_SystemSemaphore_Acquire(UnityClassic::Baselib_SystemSemaphore_Handle) + 36 (Baselib_SystemSemaphore_DarwinApi.inl.h:36)
4  UnityFramework                 0x9b0708 JobQueue::ProcessJobs(JobQueue::ThreadInfo*, void*) + 33 (Baselib_CappedSemaphore_SemaphoreBased.inl.h:33)
5  UnityFramework                 0x9af920 JobQueue::WorkLoop(void*) + 1103 (JobQueue.cpp:1103)
6  UnityFramework                 0xa510c0 Thread::RunThreadWrapper(void*) + 81 (Thread.cpp:81)
7  libsystem_pthread.dylib        0x16cc _pthread_start + 148
8  libsystem_pthread.dylib        0xba4 thread_start + 8

com.google.firebase.crashlytics.MachExceptionServer
0  UnityFramework                 0x2c81d8 FIRCLSProcessRecordAllThreads + 393 (FIRCLSProcess.c:393)
1  UnityFramework                 0x2c85b8 FIRCLSProcessRecordAllThreads + 424 (FIRCLSProcess.c:424)
2  UnityFramework                 0x2bf8c8 FIRCLSHandler + 34 (FIRCLSHandler.m:34)
3  UnityFramework                 0x2c2018 FIRCLSMachExceptionServer + 521 (FIRCLSMachException.c:521)
4  libsystem_pthread.dylib        0x16cc _pthread_start + 148
5  libsystem_pthread.dylib        0xba4 thread_start + 8

com.apple.NSURLConnectionLoader
0  libsystem_kernel.dylib         0xda8 mach_msg2_trap + 8
1  libsystem_kernel.dylib         0x13a1c mach_msg2_internal + 80
2  libsystem_kernel.dylib         0x13c5c mach_msg_overwrite + 388
3  libsystem_kernel.dylib         0x12ec mach_msg + 24
4  CoreFoundation                 0x7aac4 __CFRunLoopServiceMachPort + 160
5  CoreFoundation                 0x7bd08 __CFRunLoopRun + 1232
6  CoreFoundation                 0x80eb0 CFRunLoopRunSpecific + 612
7  CFNetwork                      0x257ff0 _CFURLStorageSessionDisableCache + 61088
8  Foundation                     0x5b518 __NSThread__start__ + 716
9  libsystem_pthread.dylib        0x16cc _pthread_start + 148
10 libsystem_pthread.dylib        0xba4 thread_start + 8

JavaScriptCore libpas scavenger
0  libsystem_kernel.dylib         0x167c __psynch_cvwait + 8
1  libsystem_pthread.dylib        0x806c _pthread_cond_wait + 1232
2  JavaScriptCore                 0xf703c scavenger_thread_main + 1164
3  libsystem_pthread.dylib        0x16cc _pthread_start + 148
4  libsystem_pthread.dylib        0xba4 thread_start + 8

Thread
0  libsystem_kernel.dylib         0x167c __psynch_cvwait + 8
1  libsystem_pthread.dylib        0x8098 _pthread_cond_wait + 1276
2  UnityFramework                 0x12ced98 il2cpp::os::posix::PosixWaitObject::Wait(unsigned int, bool) + 153 (PosixWaitObject.cpp:153)
3  UnityFramework                 0x12c3e18 monitor_thread(void*) + 156 (ThreadPoolMonitorThread.cpp:156)
4  UnityFramework                 0x12f6770 il2cpp::vm::ThreadStart(void*) + 727 (Thread.cpp:727)
5  UnityFramework                 0x12c5d30 il2cpp::os::Thread::RunWrapper(void*) + 183 (Thread.cpp:183)
6  UnityFramework                 0x12c7fe0 il2cpp::os::ThreadImpl::ThreadStartWrapper(void*) + 127 (ThreadImpl.cpp:127)
7  libsystem_pthread.dylib        0x16cc _pthread_start + 148
8  libsystem_pthread.dylib        0xba4 thread_start + 8

Timer-Scheduler
0  libsystem_kernel.dylib         0x167c __psynch_cvwait + 8
1  libsystem_pthread.dylib        0x806c _pthread_cond_wait + 1232
2  UnityFramework                 0x12cedfc il2cpp::os::posix::PosixWaitObject::Wait(unsigned int, bool) + 120 (PosixWaitObject.cpp:120)
3  UnityFramework                 0x12b9494 il2cpp::icalls::mscorlib::System::Threading::WaitHandle::Wait_internal(void**, int, bool, int) + 91 (WaitHandle.cpp:91)
4  UnityFramework                 0x3284234 selector_thread(void*) (.cold.1) + 4527784500
5  UnityFramework                 0x3284100 selector_thread(void*) (.cold.1) + 4527784192
6  UnityFramework                 0x32b9394 selector_thread(void*) (.cold.1) + 4528001940
7  UnityFramework                 0x3223c6c selector_thread(void*) (.cold.1) + 4527389804
8  UnityFramework                 0x3269af4 selector_thread(void*) (.cold.1) + 4527676148
9  UnityFramework                 0x3323434 selector_thread(void*) (.cold.1) + 4528436276
10 UnityFramework                 0x3223c6c selector_thread(void*) (.cold.1) + 4527389804
11 UnityFramework                 0x11308c RuntimeInvoker_TrueVoid_t700C6383A2A510C2CF4DD86DABD5CA9FF70ADAC5(void (*)(), MethodInfo const*, void*, void**) + 4475941004 (Il2CppInvokerTable.cpp:4475941004)
12 UnityFramework                 0x1306fcc il2cpp::vm::Runtime::Invoke(MethodInfo const*, void*, void**, Il2CppException**) + 564 (Runtime.cpp:564)
13 UnityFramework                 0x12b8ee8 il2cpp::icalls::mscorlib::System::Threading::ThreadStart(void*) + 158 (Thread.cpp:158)
14 UnityFramework                 0x12c5d30 il2cpp::os::Thread::RunWrapper(void*) + 183 (Thread.cpp:183)
15 UnityFramework                 0x12c7fe0 il2cpp::os::ThreadImpl::ThreadStartWrapper(void*) + 127 (ThreadImpl.cpp:127)
16 libsystem_pthread.dylib        0x16cc _pthread_start + 148
17 libsystem_pthread.dylib        0xba4 thread_start + 8

Thread
0  libsystem_kernel.dylib         0x12b0 __workq_kernreturn + 8
1  libsystem_pthread.dylib        0xe44 _pthread_wqthread + 364
2  libsystem_pthread.dylib        0xb98 start_wqthread + 8

IL2CPP Threadpool worker
0  libsystem_kernel.dylib         0x167c __psynch_cvwait + 8
1  libsystem_pthread.dylib        0x806c _pthread_cond_wait + 1232
2  UnityFramework                 0x12cdf14 il2cpp::os::ConditionVariableImpl::TimedWait(il2cpp::os::FastMutexImpl*, unsigned int) + 51 (ConditionVariableImpl.cpp:51)
3  UnityFramework                 0x12c46b0 worker_thread(void*) + 87 (ThreadPoolWorkerThread.cpp:87)
4  UnityFramework                 0x12f6770 il2cpp::vm::ThreadStart(void*) + 727 (Thread.cpp:727)
5  UnityFramework                 0x12c5d30 il2cpp::os::Thread::RunWrapper(void*) + 183 (Thread.cpp:183)
6  UnityFramework                 0x12c7fe0 il2cpp::os::ThreadImpl::ThreadStartWrapper(void*) + 127 (ThreadImpl.cpp:127)
7  libsystem_pthread.dylib        0x16cc _pthread_start + 148
8  libsystem_pthread.dylib        0xba4 thread_start + 8

IL2CPP Threadpool worker
0  libsystem_kernel.dylib         0x167c __psynch_cvwait + 8
1  libsystem_pthread.dylib        0x806c _pthread_cond_wait + 1232
2  UnityFramework                 0x12cdf14 il2cpp::os::ConditionVariableImpl::TimedWait(il2cpp::os::FastMutexImpl*, unsigned int) + 51 (ConditionVariableImpl.cpp:51)
3  UnityFramework                 0x12c46b0 worker_thread(void*) + 87 (ThreadPoolWorkerThread.cpp:87)
4  UnityFramework                 0x12f6770 il2cpp::vm::ThreadStart(void*) + 727 (Thread.cpp:727)
5  UnityFramework                 0x12c5d30 il2cpp::os::Thread::RunWrapper(void*) + 183 (Thread.cpp:183)
6  UnityFramework                 0x12c7fe0 il2cpp::os::ThreadImpl::ThreadStartWrapper(void*) + 127 (ThreadImpl.cpp:127)
7  libsystem_pthread.dylib        0x16cc _pthread_start + 148
8  libsystem_pthread.dylib        0xba4 thread_start + 8

As you can see the UnityGfxDeviceWorker crashes when copying the particle system.

4

This is a really big issue for me and would really appreciate someone form Unity chiming in.

Thanks in advance!

5

Hi,
I encountered a similar issue about ParticleSystem before: Unity 2022.2.1f1 iOS Build crash (possibly with ParticleSystemGeometryJob?) .

Based on the callstack of crash and your code, I created a minimal project to reproduce the issue using Unity 2020.3.47.

Here is the code (Full project is in the attachment below):

public class Test : MonoBehaviour
{
    public GameObject Prefab;
    public int MaxCount;
    public int BatchSize;
    public int[] RandomFrameRange;

    private void Start()
    {
        Application.runInBackground = true;

        for (int i = 0; i < MaxCount / BatchSize; ++i)
            StartCoroutine(Execute(BatchSize));
    }

    private IEnumerator Execute(int batchSize)
    {
        var pss = new List<ParticleSystem>(batchSize);

        while (true)
        {
            for (int i = 0; i < batchSize; ++i)
            {
                var go = Instantiate(Prefab);
                var ps = go.GetComponent<ParticleSystem>();
                pss.Add(ps);
            }

            int frames = Random.Range(RandomFrameRange[0], RandomFrameRange[1]);
            while (frames-- > 0)
                yield return null;

            for (int i = 0; i < batchSize; ++i)
            {
                var particles = new ParticleSystem.Particle[pss[i].particleCount];
                pss[i].GetParticles(particles);
            }

            frames = 5;
            while (frames-- > 0)
                yield return null;

            for (int i = 0; i < batchSize; ++i)
            {
                Destroy(pss[i]);
            }

            pss.Clear();

            yield return null;
        }
    }
}

The project can reproduce the issue in minutes on the following devices:

  • Mi 10
  • Redmi 8A
  • iPhone 6s

I think it’s an issue about race condition: some data is being created when ParticleSystem.GetParticles is called, and at the same time, ParticleSystemParticles::CopyToArrayAOS tries to use that data.

The project has been submitted to Unity: IN-40907.

9009394–1241863–ParticleSystemCrash.zip (29.4 KB)

6

As a workaround, you can try to use ParticleSystem.Simulate before calling ParticleSystem.GetParticles. ParticleSystem.Simulate will sync with render job internally, so it should avoid ParticleSystem.GetParticles and render job from running simultaneously:

for (int i = 0; i < batchSize; ++i)
{
    var particles = new ParticleSystem.Particle[pss[i].particleCount];
    pss[i].Simulate(0, true, false);  // <----
    pss[i].GetParticles(particles);
}
7

IssueTracker link: Unity Issue Tracker - [Android] The Player crashes after a few seconds when Particles are generated and deleted continuously over time