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Question Il2CPP crashes

Discussion in 'Windows' started by Pixeye, Mar 16, 2021.

  1. Pixeye

    Pixeye

    Joined:
    Jul 2, 2011
    Posts:
    195
    Hello, we do some playtesting for our game on Windows Steam and several testers got crushes during the play. I've attached crashes with dumps. Can anyone help me understanding the problem and what steps I need to do to resolve this issue?


    Read from location 0000000C caused an access violation.
    

    
Context:
    
EDI:    0x20be94cc  ESI: 0x20be94b0  EAX:   0x20be94b0
    
EBX:    0x2fd0a190  ECX: 0x00000000  EDX:   0x00000000
    
EIP:    0x58865e5f  EBP: 0x003af254  SegCs: 0x00000023
    
EFlags: 0x00210202  ESP: 0x003af24c  SegSs: 0x0000002b
    

    

    
Bytes at CS:EIP:
    
3b 4a 0c 75 18 ff 35 24 4a e8 59 8d 04 09 50 57 
    

    
No mono DLL path set. This app is either running IL2CPP, or the crash occurred before mono was initialized.
    

    

    
Stack Trace of Crashed Thread 12764:
    
0x58865E5F (GameAssembly) WriteZStream
    
0x59090D5B (GameAssembly) WriteZStream
    
0x590899C0 (GameAssembly) WriteZStream
    
ERROR: SymGetSymFromAddr64, GetLastError: 'Attempt to access invalid address.' (Address: 58508E9C)
    
0x58508E9C (GameAssembly) (function-name not available)
    
0x5860BECF (GameAssembly) UnityPalGetTimeZoneDataForID
    
0x585D5076 (GameAssembly) il2cpp_runtime_invoke
    
0x5A7BF107 (UnityPlayer) UnityMain
    
0x5A7CC6C5 (UnityPlayer) UnityMain
    
0x5A7CC7CC (UnityPlayer) UnityMain
    
0x5A7F3957 (UnityPlayer) UnityMain
    
0x5A7D40C8 (UnityPlayer) UnityMain
    
0x5A5DB402 (UnityPlayer) UnityMain
    
0x5A54F500 (UnityPlayer) UnityMain
    
0x5A54F4A7 (UnityPlayer) UnityMain
    
0x5A54F4A7 (UnityPlayer) UnityMain
    
0x5A54F4A7 (UnityPlayer) UnityMain
    
0x5A54F4A7 (UnityPlayer) UnityMain
    
0x5A54F36F (UnityPlayer) UnityMain
    
0x5A55045A (UnityPlayer) UnityMain
    
0x5A6DB5BA (UnityPlayer) UnityMain
    
0x5A6FADE3 (UnityPlayer) UnityMain
    
0x5A6F4AC9 (UnityPlayer) UnityMain
    
0x5A6F6521 (UnityPlayer) UnityMain
    
0x5A6E41F3 (UnityPlayer) UnityMain
    
0x5A6E4270 (UnityPlayer) UnityMain
    
0x5A6E5EF0 (UnityPlayer) UnityMain
    
ERROR: SymGetSymFromAddr64, GetLastError: 'Attempt to access invalid address.' (Address: 5A506588)
    
0x5A506588 (UnityPlayer) (function-name not available)
    
ERROR: SymGetSymFromAddr64, GetLastError: 'Attempt to access invalid address.' (Address: 5A5055A8)
    
0x5A5055A8 (UnityPlayer) (function-name not available)
    
ERROR: SymGetSymFromAddr64, GetLastError: 'Attempt to access invalid address.' (Address: 5A508CDC)
    
0x5A508CDC (UnityPlayer) (function-name not available)
    
0x5A50BAA5 (UnityPlayer) UnityMain
    
ERROR: SymGetSymFromAddr64, GetLastError: 'Attempt to access invalid address.' (Address: 00221015)
    
0x00221015 (Until We Die) (function-name not available)
    
ERROR: SymGetSymFromAddr64, GetLastError: 'Attempt to access invalid address.' (Address: 002211D9)
    
0x002211D9 (Until We Die) (function-name not available)
    
0x756EFA29 (KERNEL32) BaseThreadInitThunk
    
0x77087C7E (ntdll) RtlGetAppContainerNamedObjectPath
    
0x77087C4E (ntdll) RtlGetAppContainerNamedObjectPath
     

    Attached Files:

    Pixeye, Mar 16, 2021
    #1
    DearUnityPleaseAddSerializableDictionaries likes this.

  2. JoshPeterson

    JoshPeterson

    Unity Technologies

    Joined:
    Jul 21, 2014
    Posts:
    6,936
    You may want to try to change the C++ compiler configuration to be Debug in the Player Settings. This will give you a debug build of the generated C++ code that came from IL2CPP. That will allow you to see a better stack trace (this one looks like it is not symbolicated correctly).

    You can also use the option in the build setting to generated a Visual Studio solution when you build. If you open that solution, you can debug the generated C++ code, which might give a hint about what is happening.
     
    JoshPeterson, Mar 16, 2021
    #2

  3. Tautvydas-Zilys

    Tautvydas-Zilys

    Unity Technologies

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    Hey, you generally shouldn't look at the logs for shipped games: they will not have enough debug information to print out the correct callstack. The dump files you attached contain the right callstack, though you need the PDB files to actually be able to resolve them.

    When you create a build with IL2CPP, a folder named "<GameName>_BackUpThisFolder_ButDontShipItWithYourGame" gets created. Can you attach its contents here (.pdb + generated C++ files)? You can PM them to me as they may contain your private source code information. I can see that the crash is inside generated C++ code, but I cannot tell any more without those debug symbols.
     
    Tautvydas-Zilys, Mar 16, 2021
    #3

  4. Pixeye

    Pixeye

    Joined:
    Jul 2, 2011
    Posts:
    195
    Guys, thanks a lot for your advices, it seems I messed with some unsafe stuff this time. :eek:
    We have fixed the issue. I will leave this thread open in case if I'm wrong
     
    Pixeye, Mar 17, 2021
    #4

  5. unity_bfjq3sz0j5

    unity_bfjq3sz0j5

    Joined:
    Jul 6, 2020
    Posts:
    1
    We have met the same error, how did you fixed it?
     
    unity_bfjq3sz0j5, May 12, 2021
    #5

  6. Steviebops

    Steviebops

    Joined:
    Apr 9, 2013
    Posts:
    132
    I am also getting a similar error, may I ask how it was fixed?
     
    Steviebops, Jul 2, 2021
    #6

  7. Kamyker

    Kamyker

    Joined:
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    Posts:
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    One of my players reported this issue, a bit different stacktrace but he got it fixed by removing Powershell from windows PATH. Unity loads too many dlls?

     
    Kamyker, Feb 3, 2022
    #7

  8. Tautvydas-Zilys

    Tautvydas-Zilys

    Unity Technologies

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    Well that sounds fun. That DLL is actually part of Windows 8+, and we do try to load it on startup. I guess for whatever reason powershell includes them? That's so weird. Do you have any dumps you can share from the crashes that resulted from this?
     
    Tautvydas-Zilys, Feb 3, 2022
    #8

  9. Kamyker

    Kamyker

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    He's using Windows 7 SP1 so maybe these dlls in powershell are a bit old? I have dmp but pdbs seem to not work anymore after overwriting them with newer build.

    Stack:
    Code (CSharp):
    1. 0x000007FEC638F53D (GameAssembly) il2cpp_value_box
    2. 0x000007FEC638FD74 (GameAssembly) il2cpp_value_box
    3. 0x000007FEC88405D1 (GameAssembly) WriteZStream
    4. 0x000007FEC8428690 (GameAssembly) WriteZStream
    5. 0x000007FEC8427D41 (GameAssembly) WriteZStream
    6. 0x000007FEC8430845 (GameAssembly) WriteZStream
    7. 0x000007FEC839261C (GameAssembly) WriteZStream
    8. 0x000007FEC7DFF892 (GameAssembly) WriteZStream
    9. 0x000007FEC853E1B3 (GameAssembly) WriteZStream
    10. 0x000007FEC6B5CA36 (GameAssembly) WriteZStream
    11. 0x000007FEC848E44C (GameAssembly) WriteZStream
    12.   ERROR: SymGetSymFromAddr64, GetLastError: 'Attempt to access invalid address.' (Address: 000007FEC5F52A91)
    13. 0x000007FEC5F52A91 (GameAssembly) (function-name not available)
    14. 0x000007FEC6407CE3 (GameAssembly) DllGetActivationFactory
    15. 0x000007FEC63DB1EF (GameAssembly) UnityPalGetTimeZoneDataForID
    16. 0x000007FEC6394092 (GameAssembly) il2cpp_value_box
    17. 0x000007FEC6395573 (GameAssembly) il2cpp_value_box
    18. 0x00000000778655DD (kernel32) BaseThreadInitThunk
    19. 0x0000000077AC2B1D (ntdll) RtlUserThreadStart
     
    Kamyker, Feb 3, 2022
    #9

  10. Tautvydas-Zilys

    Tautvydas-Zilys

    Unity Technologies

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    Yeah that callstack is garbage. Without original PDBs, you will not be able to resolve the callstack. That's why the directory is named "BackupThisFolder" :). You cannot recreate them once you delete them.

    I highly doubt those two DLLs are the cause for the crash, since they are used by UnityPlayer.dll, not GameAssembly.dll. It could be that GameAssembly.dll also doesn't play nice with powershell on Windows 7...
     
    Tautvydas-Zilys, Feb 3, 2022
    #10

  11. Kamyker

    Kamyker

    Joined:
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    Hmm, nevermind it seems to be more serious. Different player reported same stacktrace but it happened after playing the game for few mins on Win10. Ill update Unity to the newest one (from 2020.3.25 to 27) make a build and save pdbs.

    #Edit
    Also crashes on 27. My vs is loading dmp rn.

    #Edit2
    Dmp stacktrace:

    Code (CSharp):
    1.      [Inline Frame] GameAssembly.dll!il2cpp::utils::ExceptionSupportStack<Il2CppObject *,3>::top() Line 37    C++
    2.      GameAssembly.dll!U3CConnectSocketAsyncU3Ed__25_MoveNext_m7814B38F91E8536733A0376CF4094DAEAAA4E5F7(U3CConnectSocketAsyncU3Ed__25_t0E25D59582E216B9052D4EEBAF014F75C4FCCE95 * __this, const MethodInfo * method) Line 37839    C++
    3.      GameAssembly.dll!ContextCallback_Invoke_mF4F8496213E8F0925947DD8994A477AE2E54EFDF(ContextCallback_t93707E0430F4FF3E15E1FB5A4844BE89C657AE8B * __this, Il2CppObject * ___state0, const MethodInfo * method) Line 22160    C++
    4.      GameAssembly.dll!ExecutionContext_RunInternal_mC5D58D6EDE270B4CDA05181E9064E040D6692B2B(ExecutionContext_t16AC73BB21FEEEAD34A017877AC18DD8BB836414 * ___executionContext0, ContextCallback_t93707E0430F4FF3E15E1FB5A4844BE89C657AE8B * ___callback1, Il2CppObject * ___state2, bool ___preserveSyncCtx3, const MethodInfo * method) Line 34557    C++
    5. >    GameAssembly.dll!MoveNextRunner_Run_mF9986F86D538F629861F62DD912B18CC58980D8B(MoveNextRunner_tFAEA0BEDD353E2E34E8E287C67B1F5572FD30C2D * __this, const MethodInfo * method) Line 25934    C++
    6.      GameAssembly.dll!CurrentUserUpdateHandler_Invoke_m835DD5CA213BCC95E723A956A6812BB17C3A6A05(CurrentUserUpdateHandler_t1BC7782B2DAFED129FF43DFDC8882924B2F25FDD * __this, const MethodInfo * method) Line 27970    C++
    7.      GameAssembly.dll!AwaitTaskContinuation_RunOrScheduleAction_m0969B6B0998248D42B6E4D04AC29ADE2D62B6412(Action_tAF41423D285AE0862865348CF6CE51CD085ABBA6 * ___action0, bool ___allowInlining1, Task_t804B25CFE3FC13AAEE16C8FA3BF52513F2A8DB60 * * ___currentTask2, const MethodInfo * method) Line 28396    C++
    8.      GameAssembly.dll!Task_FinishContinuations_m41A7DC9B3A0DC7181BC0B5D353E5A702D1B2D0FF(Task_t804B25CFE3FC13AAEE16C8FA3BF52513F2A8DB60 * __this, const MethodInfo * method) Line 32912    C++
    9.      GameAssembly.dll!Task_Finish_m924F5D1414BDC1A572D3C925CD9FBD4147C09FD5(Task_t804B25CFE3FC13AAEE16C8FA3BF52513F2A8DB60 * __this, bool ___bUserDelegateExecuted0, const MethodInfo * method) Line 30194    C++
    10.      GameAssembly.dll!Task_1_TrySetException_mAEC49933FB8034AA98C144D4F9122BE42B89BB0B_gshared(Task_1_t65FD5EE287B61746F015BBC8E90A97D38D258FB3 * __this, Il2CppObject * ___exceptionObject0, const MethodInfo * method) Line 11013    C++
    11.      GameAssembly.dll!TaskFactory_1_FromAsyncCoreLogic_m275BD4B3DCBB279B30F09EDF17FE238E8FF9B1A6_gshared(Il2CppObject * ___iar0, Func_2_t93436DB66248BF735350EEC072257D84453153ED * ___endFunction1, Action_1_tA4ED4B57984FE5F6E13A416523D6DF1DD51BEB76 * ___endAction2, Task_1_t65FD5EE287B61746F015BBC8E90A97D38D258FB3 * ___promise3, bool ___requiresSynchronization4, const MethodInfo * method) Line 13225    C++
    12.      GameAssembly.dll!U3CU3Ec__DisplayClass41_1_2_U3CFromAsyncImplU3Eb__1_m3C725EB4CD0E34A0C5F7EF148895C9BA26E7F2FA_gshared(U3CU3Ec__DisplayClass41_1_2_tEBE5D257DDF5C945B4BA88CD4A251C3222AA8BC1 * __this, Il2CppObject * ___iar0, const MethodInfo * method) Line 160533    C++
    13.      GameAssembly.dll!AsyncCallback_Invoke_mFCCCB843AEC4B5B3FC89BCED2BA839783920EA47(AsyncCallback_tA7921BEF974919C46FF8F9D9867C567B200BB0EA * __this, Il2CppObject * ___ar0, const MethodInfo * method) Line 23451    C++
    14.      GameAssembly.dll!DataReceivedHandler_Invoke_m1F4323C0D94981031A547AD42494D8B465339E9D(DataReceivedHandler_tA9DACE28B74769B0668807EC0A9D3744ACB348D1 * __this, String_t * ___value0, const MethodInfo * method) Line 43501    C++
    15.      GameAssembly.dll!ThreadPoolWorkQueue_Dispatch_mCC5743D99870EC7844CAB3FF3FA7D23A44A4A984(const MethodInfo * method) Line 24623    C++
    16.      GameAssembly.dll!RuntimeInvoker_FalseRefInstance_t1BFBBBB45B2FB90281237C356B5E55761782ECA8(void(*)() methodPointer, const MethodInfo * methodMetadata, void * obj, void * * args) Line 506549    C++
    17.      GameAssembly.dll!worker_thread(void * data) Line 251    C++
    18.      GameAssembly.dll!il2cpp::vm::ThreadStart(void * arg) Line 708    C++
    19.      GameAssembly.dll!il2cpp::os::Thread::RunWrapper(void * arg) Line 186    C++
    20.      GameAssembly.dll!il2cpp::os::ThreadStartWrapper(void * arg) Line 28    C++
    21.      kernel32.dll!BaseThreadInitThunk()    Unknown
    22.      ntdll.dll!RtlUserThreadStart()    Unknown
    23.  

     
    Last edited: Feb 4, 2022
    Kamyker, Feb 4, 2022
    #11

  12. Kamyker

    Kamyker

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    Looks like this crash is caused by MQTTnet and its managed client https://github.com/dotnet/MQTTnet/wiki/ManagedClient as it runs on separate thread. No idea if it's their bug or il2cpp but somehow it crashes only for few.

    To make sure my context switching to main thread wasn't the issue I've tried making a build that doesn't do anything other than connecting and it also crashed.

    For now I'll disable it (and chat in my game) but hopefully it can be fixed as I want to use it for any server to client communication/notifications.
     
    Last edited: Feb 4, 2022
    Kamyker, Feb 4, 2022
    #12

  13. Tautvydas-Zilys

    Tautvydas-Zilys

    Unity Technologies

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    Can you report a bug?
     
    Tautvydas-Zilys, Feb 4, 2022
    #13

  14. Kamyker

    Kamyker

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    1,091
    Sure case 1400545.
     
    Kamyker, Feb 4, 2022
    #14
    JoshPeterson likes this.

  15. Kamyker

    Kamyker

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    May 14, 2013
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    I made a small build with only Steam login that authorizes with mqtt and publish message button. It crashes for the player when he spams the button (doesn't on my pc when I do the same). I'll try making a build that doesn't require steam and access to my game, for now this excludes DataReceivedHandler or CurrentUserUpdateHandler being a problem as those are handlers for native plugins like discord sdk.
     
    Kamyker, Feb 6, 2022
    #15

  16. Kamyker

    Kamyker

    Joined:
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    Any news? Is it fixable from dmp alone?
     
    Kamyker, Feb 13, 2022
    #16

  17. JoshPeterson

    JoshPeterson

    Unity Technologies

    Joined:
    Jul 21, 2014
    Posts:
    6,936
    Hey, I've been looking at the bug report details today. Unfortunately I don't think we can fix it from the dump report alone.

    It looks like there is some problem with IL2CPP's exception handling flow control - the crash happens because we hit an assert that should never be true. Basically IL2CPP keeps a stack of in-flight exceptions - in this case it goes to pop one off that stack, but the stack is empty. So this is necessarily a flow control thing we need to debug. Inspecting the code, I don't see how this could ever happen, but clearly it does!

    Do you have any possibility of moving to Unity 2021.2 or later, at least to try this? The exception flow control code is better in that version and later. I wonder if this issue is "fixed" there.
     
    JoshPeterson, Feb 15, 2022
    #17

  18. Kamyker

    Kamyker

    Joined:
    May 14, 2013
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    Hey, thanks for looking into it. I've sent build with Unity 2021.2.11 to the crashing user and waiting for response. I'm not very optimistic of moving game to 2021.2 but I removed all ECS usage few months ago so it's possible.
     
    Kamyker, Feb 17, 2022
    #18
    JoshPeterson likes this.

  19. DearUnityPleaseAddSerializableDictionaries

    DearUnityPleaseAddSerializableDictionaries

    Joined:
    Sep 12, 2014
    Posts:
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    One of my players also got a similar error this week with UnityPalGetTimeZoneDataForID.

    Unable to reproduce it but my player can. DM me your Discord or list of assets, maybe we use a common asset or something.
     
    Last edited: Feb 20, 2022
    DearUnityPleaseAddSerializableDictionaries, Feb 20, 2022
    #19

  20. DearUnityPleaseAddSerializableDictionaries

    DearUnityPleaseAddSerializableDictionaries

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    Nevermind my post above. This was from `Shaders.Find`, which was reproducible on my player's computer but not mine. Added the shader to "Always Included Shaders".
     
    DearUnityPleaseAddSerializableDictionaries, Feb 20, 2022
    #20

  21. Kamyker

    Kamyker

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    It's fixed there. Released build yesterday, no issues so far.
     
    Kamyker, Mar 8, 2022
    #21