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Bug Internal bursted Debug.LogError() makes hard crashes on iOS platform

Discussion in 'Unity Transport' started by Kichang-Kim, Apr 21, 2022.

  1. Kichang-Kim

    Kichang-Kim

    Joined:
    Oct 19, 2010
    Posts:
    887
    Hi. I found that Unity Transport's burst-compiled Debug.LogError() in UnityTransportProtocol.cs (ex, line 367) makes hard crashes on iOS Platform. Especially, when accessing Unity's API in Application.logMessageReceived handler.

    Here is a part of stack-trace of crash report:
    Native StackTrace:

    Thread 0 (crashed)
    0 libsystem_kernel.dylib 0x00000001bb1d2bbc <symbols missing for uuid: 3d3637098d2d3d1e8cab11d232e5d508>
    1 libsystem_c.dylib 0x000000018b13ca50 <symbols missing for uuid: 0c058d0be8f036aa9766fa72ee100d98>
    2 UnityFramework 0x00000001091cf4d8 DebugStringToFilePostprocessedStacktrace(DebugStringToFileData const&) (/Users/bokken/buildslave/unity/build/Runtime/Core/Containers/String.h:222)
    3 UnityFramework 0x00000001091cf9dc DebugStringToFile(DebugStringToFileData const&) (/Users/bokken/buildslave/unity/build/Runtime/Core/Containers/String.h:222)
    4 UnityFramework 0x00000001089c4b78 burst_abort_optional_longjmp(char const*, char const*, bool, core::basic_string<char, core::StringStorageDefault<char> >) (/Users/bokken/buildslave/unity/build/Runtime/Core/Containers/String.h:222)
    5 UnityFramework 0x00000001089c4ab8 burst_abort(char const*, char const*) (/Users/bokken/buildslave/unity/build/Runtime/Jobs/ScriptBindings/JobsBindings.cpp:576)
    6 UnityFramework 0x0000000108b4b098 scripting_raise_exception(ScriptingExceptionPtr) (/Users/bokken/buildslave/unity/build/Runtime/Scripting/ScriptingException.cpp:36)
    7 UnityFramework 0x0000000108b4b66c CreateUnityExceptionCommonMessage(char const*) (/Users/bokken/buildslave/unity/build/Runtime/Scripting/ScriptingException.cpp:73)
    8 UnityFramework 0x0000000108b4ff7c ThreadAndSerializationSafeCheck::ReportError(int, char const*, ...) (/Users/bokken/buildslave/unity/build/Runtime/Scripting/ScriptingThreadAndSerializationSafeCheck.cpp:97)
    9 UnityFramework 0x0000000108b4ffb0 IManagedObjectHost::ReinterpretCast(Object*) (/Users/bokken/buildslave/unity/build/Runtime/Scripting/ManagedReference/IManagedObjectHost.h:91)
    10 UnityFramework 0x0000000108b4e36c ThreadAndSerializationSafeCheck::ReportError(char const*) (/Users/bokken/buildslave/unity/build/Runtime/Scripting/ScriptingThreadAndSerializationSafeCheck.cpp:200)
    11 UnityFramework 0x00000001088475e0 Time_Get_Custom_PropRealtimeSinceStartupAsDouble() (/Users/bokken/buildslave/unity/build/artifacts/iOS/Modules/iOS_arm64_dev_i_ut_r/Bindings/CoreBindings.gen.cpp:61585)
    12 UnityFramework 0x0000000109a92670 ErrorReportingSystem_LogMessageReceivedCore_m71FC8E1ED729481966884757C05420026783EDC9 (MY-PROJECT-PATH/xcode/Classes/Native/Assembly-CSharp11.cpp:0)
    13 UnityFramework 0x0000000109a93c1c U3CLogMessageReceivedOnMainThreadU3Ed__13_MoveNext_mF6F8EB3C573A9A52AE65A34C5DC8929A7FA259AA (MY-PROJECT-PATH/xcode/Classes/Native/Assembly-CSharp11.cpp:16012)
    14 UnityFramework 0x0000000109a924e4 ErrorReportingSystem_LogMessageReceivedOnMainThread_m56DD32DBABCF3A1678C3B4CA1CDA01AA1667B6E3 (MY-PROJECT-PATH/xcode/Classes/Native/Assembly-CSharp11.cpp:14762)
    15 UnityFramework 0x0000000109a923e0 ErrorReportingSystem_LogMessageReceived_mBF87D66F9B2FB79CBECC4529C98A506FE837A25D (MY-PROJECT-PATH/xcode/Classes/Native/Assembly-CSharp11.cpp:14706)
    16 UnityFramework 0x0000000108773838 LogCallback_Invoke_m88EACBF170351AE6FC8E6F5154CD09179D67BB47_Multicast(LogCallback_tCFFF3C009186124A6A83A1E6BB7E360C5674C413*, String_t*, String_t*, int, MethodInfo const*) (MY-PROJECT-PATH/xcode/Classes/Native/UnityEngine.CoreModule.cpp:14484)
    17 UnityFramework 0x00000001098139f4 il2cpp::vm::Runtime::InvokeWithThrow(MethodInfo const*, void*, void**) (/Users/bokken/buildslave/unity/build/External/il2cpp/builds/libil2cpp/vm/Runtime.cpp:0)
    18 UnityFramework 0x000000010981383c il2cpp::vm::Runtime::Invoke(MethodInfo const*, void*, void**, Il2CppException**) (/Users/bokken/buildslave/unity/build/External/il2cpp/builds/libil2cpp/vm/Runtime.cpp:570)
    19 UnityFramework 0x0000000108b3d724 scripting_method_invoke(ScriptingMethodPtr, ScriptingObjectPtr, ScriptingArguments&, ScriptingExceptionPtr*, bool) (/Users/bokken/buildslave/unity/build/Runtime/ScriptingBackend/Il2Cpp/ScriptingApi_Il2Cpp.cpp:292)
    20 UnityFramework 0x0000000108b4c4a4 ScriptingInvocation::Invoke(ScriptingExceptionPtr*, bool) (/Users/bokken/buildslave/unity/build/Runtime/Scripting/ScriptingInvocation.cpp:0)
    21 UnityFramework 0x0000000108b1c778 Application_Bindings::LogCallbackImplementation(DebugStringToFileData const&, LogType, bool) (/Users/bokken/buildslave/unity/build/Runtime/ScriptingBackend/ScriptingNativeTypes.h:65)
    22 UnityFramework 0x00000001091cf634 CallbackArray3<DebugStringToFileData const&, LogType, bool>::Invoke(DebugStringToFileData const&, LogType, bool) (/Users/bokken/buildslave/unity/build/Runtime/Core/Callbacks/CallbackArray.h:405)
    23 UnityFramework 0x00000001091cf12c DebugStringToFilePostprocessedStacktrace(DebugStringToFileData const&) (/Users/bokken/buildslave/unity/build/Runtime/Logging/LogAssert.cpp:893)
    24 UnityFramework 0x00000001091cf9dc DebugStringToFile(DebugStringToFileData const&) (/Users/bokken/buildslave/unity/build/Runtime/Core/Containers/String.h:222)
    25 UnityFramework 0x00000001088fc4c4 DefaultBurstLogCallback(void*, BurstLogType, char const*, char const*, int) (/Users/bokken/buildslave/unity/build/Runtime/Burst/Burst.cpp:1217)
    26 UnityFramework 0x0000000109907454 ac437fae5438a84f5acb46d9379b0a3c (MY-PROJECT-PATH/Library/PackageCache/com.unity.transport@1.0.0-pre.16/Runtime/UnityTransportProtocol.cs:370)
    27 UnityFramework 0x00000001089c5bdc ExecuteJob(ManagedJobData*, void (*)(void*, void*, void*, void*, int), int, unsigned char*) (/Users/bokken/buildslave/unity/build/Runtime/Jobs/ScriptBindings/JobsBindings.cpp:1131)
    28 UnityFramework 0x00000001089c5188 ForwardJobToManaged(ManagedJobData*) (/Users/bokken/buildslave/unity/build/Runtime/Jobs/ScriptBindings/JobsBindings.cpp:1410)
    29 UnityFramework 0x00000001089c21b4 JobQueue::Exec(JobInfo*, long long, int, bool) (/Users/bokken/buildslave/unity/build/Runtime/Jobs/Internal/JobQueue.cpp:0)
    30 UnityFramework 0x00000001089c372c JobQueue::WaitForJobGroupID(JobGroupID, JobQueue::JobQueueWorkStealMode) (/Users/bokken/buildslave/unity/build/Runtime/Jobs/Internal/JobQueue.cpp:0)
    31 UnityFramework 0x00000001089be81c CompleteFenceInternal(JobFence&, WorkStealMode) (/Users/bokken/buildslave/unity/build/Runtime/Jobs/Jobs.cpp:17)
    32 UnityFramework 0x0000000108b0a8bc ScheduleBatchedScriptingJobsAndComplete(JobFence&, ScriptingExceptionPtr*)

    Even it is called from main thread, accessing to Time.realtimeSinceStartupAsDouble makes crashes.

    Similar issue but occurred in Editor is reported as Case 1421406.
    https://forum.unity.com/threads/case-1421406-editor-crashes-when-logging-from-bursted-job.1270262/
     
    mbaker likes this.
  2. simon-lemay-unity

    simon-lemay-unity

    Unity Technologies

    Joined:
    Jul 19, 2021
    Posts:
    150
    Thanks for reporting this!

    Your report on the editor crash seems to indicate that this could be a wider issue than just Unity Transport and iOS. There's a chance it could happen on other platforms, it seems. Would that be an accurate statement? If so I'll forward the information to the proper team so they can have a look at this.
     
    Kichang-Kim likes this.
  3. Kichang-Kim

    Kichang-Kim

    Joined:
    Oct 19, 2010
    Posts:
    887
    Yes, I think this issue affect any other API using Debug.LogXXX in bursted job/method.