iOS app crash at certain point

I’m developing an iOS game with several plugins / services: unity iap, unity social (Game Center), Everyplay, Google Admob

The beta running without problems while my iPhone is connected with a stable WiFi connection / fast mobile network.

Now I tried to play with 64kb/s mobile network and after some time (5 - 80 seconds) the game crash. Same with unstable WiFi connection.

I don’t use any other internet related stuff, just the plugins mentioned above should communicate over internet. So I guess one of these causes the crash.

What can I do to prevent this crashes?

How to debug?

Here's an example of a log file:

OS Version:          iPhone OS 11.2.6 (15D100)

Baseband Version:    2.02.04

Report Version:      104



Exception Type:  EXC_BREAKPOINT (SIGTRAP)

Exception Codes: 0x0000000000000001, 0x0000000100e7be14

Triggered by Thread:  0



Filtered syslog:

None found



Thread 0 name:  Dispatch queue: com.apple.main-thread

Thread 0 Crashed:

0   speedup                           0x0000000100e7be14 0x100e64000 + 97812

1   speedup                           0x000000010138d414 0x100e64000 + 5411860

2   speedup                           0x0000000101dd1cb0 0x100e64000 + 16178352

3   speedup                           0x0000000101dd1c30 0x100e64000 + 16178224

4   speedup                           0x00000001017bd044 0x100e64000 + 9801796

5   speedup                           0x00000001017c1e7c 0x100e64000 + 9821820

6   speedup                           0x00000001016464c4 0x100e64000 + 8266948

7   speedup                           0x00000001016fb204 0x100e64000 + 9007620

8   speedup                           0x0000000101547d54 0x100e64000 + 7224660

9   speedup                           0x0000000100e71ac4 0x100e64000 + 56004

10  speedup                           0x0000000100e719b0 0x100e64000 + 55728

11  QuartzCore                       0x0000000185a8564c CA::Display::DisplayLink::dispatch_items+ 50764 (unsigned long long, unsigned long long, unsigned long long) + 672

12  IOKit                             0x0000000181dc2098 IODispatchCalloutFromCFMessage + 392

13  CoreFoundation                   0x0000000181ae5090 __CFMachPortPerform + 188

14  CoreFoundation                   0x0000000181affe00 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE1_PERFORM_FUNCTION__ + 56

15  CoreFoundation                   0x0000000181aff504 __CFRunLoopDoSource1 + 440

16  CoreFoundation                   0x0000000181afcfd8 __CFRunLoopRun + 2196

17  CoreFoundation                   0x0000000181a1cc58 CFRunLoopRunSpecific + 436

18  GraphicsServices                 0x00000001838c8f84 GSEventRunModal + 100

19  UIKit                             0x000000018b1755c4 UIApplicationMain + 236

20  speedup                           0x0000000100e6a4e0 0x100e64000 + 25824

21  libdyld.dylib                     0x000000018153c56c start + 4

Another one:

OS Version:          iPhone OS 11.2.6 (15D100)

Baseband Version:    2.02.04

Report Version:      104



Exception Type:  EXC_BAD_ACCESS (SIGBUS)

Exception Subtype: EXC_ARM_DA_ALIGN at 0x0000000000000041

VM Region Info: 0x41 is not in any region.  Bytes before following region: 4340776895

      REGION TYPE                      START - END             [ VSIZE] PRT/MAX SHRMOD  REGION DETAIL

      UNUSED SPACE AT START

--->  

      __TEXT                 0000000102bb0000-00000001040b4000 [ 21.0M] r-x/r-x SM=COW  ....app/speedup]



Triggered by Thread:  16



Filtered syslog:

None found



Thread 0 name:  Dispatch queue: com.apple.main-thread

Thread 0:

0   libsystem_kernel.dylib           0x000000018164b5a4 semaphore_wait_trap + 8

1   libdispatch.dylib                 0x00000001814d8f04 _dispatch_sema4_wait$VARIANT$mp + 24

2   libdispatch.dylib                 0x00000001814d9e58 _dispatch_group_wait_slow + 196

3   GameCenterFoundation             0x000000019b970c18 -[GKDispatchGroup _waitWithDispatchTimeout:] + 452

4   GameCenterFoundation             0x000000019b9327a4 -[GKDaemonProxy authenticatedLocalPlayersWithStatus:] + 136

5   GameCenterFoundation             0x000000019b8d9e3c -[GKLocalPlayerAuthenticator _handleAuthResponse:error:handler:] + 1428

6   GameCenterFoundation             0x000000019b8d8de8 __133-[GKLocalPlayerAuthenticator _authenticateUsingAuthUI:authenticationResults:usernameEditable:authUIDismissHandler:completionHandler:]_block_invoke.170 + 1132

7   CoreFoundation                   0x0000000181b5ead0 __invoking___ + 144

8   CoreFoundation                   0x0000000181a3d36c -[NSInvocation invoke] + 292

9   GameCenterFoundation             0x000000019b94720c -[NSInvocation+ 602636 (GKProxyHelpers) _gkInvokeOnce] + 28

10  GameCenterFoundation             0x000000019b935564 __53-[GKDaemonProxy connection:handleInvocation:isReply:]_block_invoke + 32

11  libdispatch.dylib                 0x00000001814d6a54 _dispatch_call_block_and_release + 24

12  libdispatch.dylib                 0x00000001814d6a14 _dispatch_client_callout + 16

13  libdispatch.dylib                 0x00000001814e3698 _dispatch_main_queue_callback_4CF$VARIANT$mp + 1016

14  CoreFoundation                   0x0000000181aff344 __CFRUNLOOP_IS_SERVICING_THE_MAIN_DISPATCH_QUEUE__ + 12

15  CoreFoundation                   0x0000000181afcf20 __CFRunLoopRun + 2012

16  CoreFoundation                   0x0000000181a1cc58 CFRunLoopRunSpecific + 436

17  GraphicsServices                 0x00000001838c8f84 GSEventRunModal + 100

18  UIKit                             0x000000018b1755c4 UIApplicationMain + 236

19  speedup                           0x0000000102bb64e0 0x102bb0000 + 25824

20  libdyld.dylib                     0x000000018153c56c start + 4

Thanks a lot for any replies!

 

I have a very similar log, it's affecting 5% of my user base. So far no luck finding the culprit.

Using Unity 2017.2.1f. Added crashlog

 

What services / plugins do you use?

 

I use an internal library for ad mediator and a bunch of libraries like admob, adcolony, amazonAds, Vungle, Unity Ads, Firebase, MobFox, MoPub, Appsflyer, Facebook, AppSee, Fabric, NewRelic