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Fixed in Not a package issue
Votes
4
Found in [Package]
2018.2, 2018.3
Issue ID
1068999
Regression
No
Hang on iOS using ARKit XR Plugin
iOS can hang with an active ARSession using Unity 2018.2.2f1, AR Foundation 1.0.0-preview.17 and ARKit XR Plugin 1.0.0-preview.13. At the time of the hang, the callstack is
WaitForSignal [inlined]
WaitForSignal [inlined]
WaitForSignal [inlined]
WaitForSignal [inlined]
::AcquireThreadOwnership()
XREngineCallbacks_BeginFrame
::Forward()
::PlayerSendFrameStarted()
::Forward()
::ExecutePlayerLoop()
::ExecutePlayerLoop()
::PlayerLoop()
::UnityPlayerLoopImpl()
::UnityRepatin()
Fixed in 2018.3.0b6
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Mjubbi
Dec 19, 2018 07:41
Still occurs in 2018.3.0f2 with ARKit XR Plugin 1.0.0-preview.20
leetful
Nov 07, 2018 19:40
Still occuring in Unity 2018.2.13f1, but appears fixed in 2018.3.0b8.
austin_unity382
Oct 25, 2018 18:01
Hello,
On Unity 2018.1.2f1 and com.unity.xr.arkit 1.0.0-preview.16 we're still seeing this issue using an iPhone SE on iOS 12.0.1. Below is the call stack for the main thread:
Thread 1 Queue : com.apple.main-thread (serial)
#0 0x000000018fda1f0c in semaphore_wait_trap ()
#1 0x000000018fbf0fc4 in _dispatch_sema4_wait$VARIANT$mp ()
#2 0x000000018fbf1a48 in _dispatch_semaphore_wait_slow ()
#3 0x0000000103f4fe7c in WaitForSignal [inlined] at /Users/builduser/buildslave/unity/build/Runtime/Threads/Semaphore.h:24
#4 0x0000000103f4fe74 in WaitForSignal [inlined] at /Users/builduser/buildslave/unity/build/Runtime/GfxDevice/threaded/GfxDeviceWorker.cpp:228
#5 0x0000000103f4fe74 in WaitForSignal [inlined] at /Users/builduser/buildslave/unity/build/Runtime/GfxDevice/threaded/GfxDeviceClient.cpp:4416
#6 0x0000000103f4fe60 in ::AcquireThreadOwnership() at /Users/builduser/buildslave/unity/build/Runtime/GfxDevice/threaded/GfxDeviceClient.cpp:2838
#7 0x0000000103f2ae94 in XREngineCallbacks_BeginFrame [inlined] at /Users/builduser/buildslave/unity/build/Modules/XR/Public/XREngineCallbacks.cpp:27
#8 0x0000000103f2ae4c in ::Forward() at /Users/builduser/buildslave/unity/build/Modules/XR/Public/XREngineCallbacks.cpp:59
#9 0x0000000103bb867c in ::PlayerSendFrameStarted() at /Users/builduser/buildslave/unity/build/Runtime/Misc/Player.cpp:951
#10 0x0000000103bb95e8 in ::ExecutePlayerLoop() at /Users/builduser/buildslave/unity/build/Runtime/Misc/PlayerLoop.cpp:337
#11 0x0000000103bb9610 in ::ExecutePlayerLoop() at /Users/builduser/buildslave/unity/build/Runtime/Misc/PlayerLoop.cpp:353
#12 0x0000000103bb976c in ::PlayerLoop() at /Users/builduser/buildslave/unity/build/Runtime/Misc/PlayerLoop.cpp:407
#13 0x00000001039e8348 in ::UnityPlayerLoopImpl() at /Users/builduser/buildslave/unity/build/PlatformDependent/iPhonePlayer/LibEntryPoint.mm:262
#14 0x000000010293e190 in ::UnityRepaint() at /Users/developer/Desktop/build/Classes/UnityAppController+Rendering.mm:263
#15 0x000000010293e07c in ::-[UnityAppController(Rendering) repaintDisplayLink]() at /Users/developer/Desktop/build/Classes/UnityAppController+Rendering.mm:76