Crash with CoreLocation

Question

Created Nov ’20

Replies 2

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Participants 1

Hello,

I'm getting crashes in an enterprise app affecting thousands. I have so far been unable to reproduce it locally.
See the crash report below, but looking through many crash reports, I can't see a lot of correlation with what is going on with the other threads that would trigger this.

This seems to be related to https://developer.apple.com/forums/thread/655243, but I'm not sure. We have confirmed that the crash only happens on iOS 12.X and below (it does not happen in iOS 14)

I would appreciate any advice how I might investigate further.

Code Block Incident Identifier: 7A45EC93-6474-49B5-9F02-9768C2A1DD93
CrashReporter Key:   TODO
Hardware Model:      iPhone7,1
Process:         MyApp [2544]
Path:            /var/containers/Bundle/Application/A5B70A01-157A-410D-8114-2101D36E7EED/MyApp.app/MyApp
Identifier:      <my_identifier>
Version:         6387
Code Type:       ARM-64
Parent Process:   [1]
Date/Time:       2020-11-18 17:01:49 +0000
OS Version:      iPhone OS 12.4.8 (16G201)
Report Version:  104
Exception Type:  SIGSEGV
Exception Codes: SEGV_MAPERR at 0x282b0
Crashed Thread:  0
Thread 0 Crashed:
0   libsystem_platform.dylib            0x00000001ab977384 _platform_strlen + 4
1   CoreLocation                        0x00000001b2b103c8 0x1b2b08000 + 33736
2   CoreLocation                        0x00000001b2b22b68 0x1b2b08000 + 109416
3   CoreLocation                        0x00000001b2b21414 0x1b2b08000 + 103444
4   CoreLocation                        0x00000001b2b0b854 0x1b2b08000 + 14420
5   CoreFoundation                      0x00000001abcf8d6c 0x1abc4e000 + 699756
6   CoreFoundation                      0x00000001abcf8670 0x1abc4e000 + 697968
7   CoreFoundation                      0x00000001abcf36b0 0x1abc4e000 + 677552
8   CoreFoundation                      0x00000001abcf2fb4 0x1abc4e000 + 675764
9   GraphicsServices                    0x00000001adef479c GSEventRunModal + 104
10  UIKitCore                           0x00000001d8554c38 UIApplicationMain + 212
11  MyApp                               0x0000000101384534 main (<compiler-generated>:0)
12  libdyld.dylib                       0x00000001ab7b68e0 start + 4
Thread 0 crashed with ARM-64 Thread State:
    pc: 0x00000001ab977384     fp: 0x000000016ea81560     sp: 0x000000016ea81520     x0: 0x00000000000282b7 
    x1: 0x00000000000282b0     x2: 0x00000000000b0000     x3: 0x0000000000000000     x4: 0x000000016ea82320 
    x5: 0x000000016ea82520     x6: 0x0000000000000000     x7: 0x0000000000000403     x8: 0x551a815a96fb002e 
    x9: 0x0000000000000008    x10: 0x0000000000000038    x11: 0x00000000000007fb    x12: 0x00000000000007fd 
   x13: 0x0000000000000000    x14: 0x000000004760e800    x15: 0x000000000000001d    x16: 0x00000001ab977380 
   x17: 0x0000000047600000    x18: 0x0000000000000000    x19: 0x0000000000000000    x20: 0x000000016ea82320 
   x21: 0x00000000000282b7    x22: 0x00000000000b0000    x23: 0x0000000000000004    x24: 0x0000000000000001 
   x25: 0x00000001bf04e033    x26: 0x0000000280629590    x27: 0x00000001e34ae000    x28: 0x000000028389b000 
    lr: 0x00000001b2b2e7a8   cpsr: 0x0000000060000000

Boost

Answer 1

lcta0707 OP

Nov ’20

I found a better example with Symbolicated values.
Here's the thread that crashed:

Code Block Thread 0 Crashed:
0   libsystem_c.dylib             	0x000000018440e38c strlen + 12
1   CoreLocation                  	0x000000018b226cc4 CLCommonEnTrHashReduceInjest + 60 (CLCommon.mm:2023)
2   CoreLocation                  	0x000000018b209068 CLClientTraceDelegateMonitorCallback + 52 (CLClient.mm:2624)
3   CoreLocation                  	0x000000018b21b57c -[CLLocationManager onClientEventRegion:] + 1500 (CLLocationManager.m:2141)
4   CoreLocation                  	0x000000018b219f70 -[CLLocationManager onClientEvent:supportInfo:] + 1064 (CLLocationManager.m:0)
5   CoreLocation                  	0x000000018b2039e8 invocation function for block in CLClientInvokeCallback(CLClient*, CLClientEvent, objc_object*) + 140 (CLClient.mm:745)
6   CoreFoundation                	0x0000000184a232bc CFRUNLOOP_IS_CALLING_OUT_TO_A_BLOCK + 20 (CFRunLoop.c:1840)
7   CoreFoundation                	0x0000000184a22a7c CFRunLoopDoBlocks + 264 (CFRunLoop.c:1881)
8   CoreFoundation                	0x0000000184a20abc __CFRunLoopRun + 2004 (CFRunLoop.c:3176)
9   CoreFoundation                	0x0000000184940da8 CFRunLoopRunSpecific + 552 (CFRunLoop.c:3245)
10  GraphicsServices              	0x0000000186926020 GSEventRunModal + 100 (GSEvent.c:2245)
11  UIKit                         	0x000000018e960758 UIApplicationMain + 236 (UIApplication.m:3965)
12  MyApp                         	0x0000000104e9c534 0x104e94000 + 34100
13  libdyld.dylib                 	0x00000001843d1fc0 start + 4

0

Answer 2

lcta0707 OP

Nov ’20

Here's some more info of the 2nd crash I listed in my comment:

Code Block Exception Type:  EXC_BAD_ACCESS (SIGSEGV)
Exception Subtype: KERN_INVALID_ADDRESS at 0x5d5cc0004c297280
VM Region Info: 0x5d5cc0004c297280 is not in any region.  Bytes after previous region: 6727463042841932417  
      REGION TYPE                      START - END             [ VSIZE] PRT/MAX SHRMOD  REGION DETAIL
      MALLOC_NANO (reserved) 00000001d8000000-00000001e0000000 [128.0M] rw-/rwx SM=NUL  ...(unallocated)
--->  
      UNUSED SPACE AT END

0