🐞 [iOS] Data race during sendTurnstileEvent

[S2Ler]

Configuration

• SDK Version 1.0.4
• Platform: iOS
• App: [Navigation SDK for iOS Example app]

Steps to Reproduce
Call many sendTurnstileEvent events with Thread Sanitizer turned on.

Expected
No data races.

Logging

==================
WARNING: ThreadSanitizer: data race (pid=55699)
  Write of size 8 at 0x00010a495850 by thread T6:
    #0 -[MMELocationManager locationManager] MMELocationManager.m:42 (MapboxMobileEvents:arm64+0x357d0)
    #1 -[MMELocationManager locationAuthorizationString] MMELocationManager.m:83 (MapboxMobileEvents:arm64+0x36144)
    #2 -[MMEEventsManager sendTurnstileEvent] MMEEventsManager.m:345 (MapboxMobileEvents:arm64+0x4ed98)
    #3 closure #1 in NavigationEventsManager.start() <null>:111260140 (Example:arm64+0x10063dc9c)
    #4 partial apply for closure #1 in NavigationEventsManager.start() <null>:111260140 (Example:arm64+0x10063dcf4)
    #5 partial apply for thunk for @callee_guaranteed (@unowned Int) -> () <null>:111260140 (libswiftDispatch.dylib:arm64+0x42f4)
    #6 _dispatch_client_callout2 <null>:111260140 (libdispatch.dylib:arm64+0x5858)

  Previous read of size 8 at 0x00010a495850 by main thread:
    #0 -[MMELocationManager locationManager] MMELocationManager.m:41 (MapboxMobileEvents:arm64+0x356f4)
    #1 -[MMELocationManager accuracyAuthorizationString] MMELocationManager.m:106 (MapboxMobileEvents:arm64+0x364d8)
    #2 -[MMEEventsManager sendTurnstileEvent] MMEEventsManager.m:350 (MapboxMobileEvents:arm64+0x4f02c)
    #3 closure #1 in NavigationEventsManager.start() <null>:111260140 (Example:arm64+0x10063dc9c)
    #4 partial apply for closure #1 in NavigationEventsManager.start() <null>:111260140 (Example:arm64+0x10063dcf4)
    #5 partial apply for thunk for @callee_guaranteed (@unowned Int) -> () <null>:111260140 (libswiftDispatch.dylib:arm64+0x42f4)
    #6 _dispatch_client_callout2 <null>:111260140 (libdispatch.dylib:arm64+0x5858)
    #7 _swift_dispatch_apply_current <null>:111260140 (libswiftDispatch.dylib:arm64+0x43a0)
    #8 NavigationEventsManager.init(activeNavigationDataSource:passiveNavigationDataSource:accessToken:mobileEventsManager:) <null>:111260140 (Example:arm64+0x10063c404)
    #9 NavigationEventsManager.__allocating_init(activeNavigationDataSource:passiveNavigationDataSource:accessToken:mobileEventsManager:) <null>:111260140 (Example:arm64+0x10063beac)
    #10 PassiveLocationManager.init(directions:systemLocationManager:eventsManagerType:userInfo:) <null>:111260140 (Example:arm64+0x10066b38c)
    #11 PassiveLocationManager.__allocating_init(directions:systemLocationManager:eventsManagerType:userInfo:) <null>:111260140 (Example:arm64+0x10066acac)
    #12 ViewController.setupPassiveLocationProvider() ViewController+FreeDrive.swift:16 (Example:arm64+0x10003c204)
    #13 ViewController.configure(_:) ViewController.swift:146 (Example:arm64+0x10000d37c)
    #14 ViewController.navigationMapView.didset ViewController.swift:44 (Example:arm64+0x100007130)
    #15 ViewController.navigationMapView.setter ViewController.swift (Example:arm64+0x10000755c)
    #16 ViewController.viewWillAppear(_:) ViewController.swift:132 (Example:arm64+0x10000cacc)
    #17 @objc ViewController.viewWillAppear(_:) <compiler-generated> (Example:arm64+0x10000d0a8)
    #18 -[UIViewController _setViewAppearState:isAnimating:] <null>:111260140 (UIKitCore:arm64+0x4bf260)
    #19 <null> <null> (0x000106695c04)

  Location is heap block of size 64 at 0x00010a495840 allocated by main thread:
    #0 calloc <null>:111260140 (libclang_rt.tsan_iossim_dynamic.dylib:arm64+0x50de4)
    #1 _objc_rootAllocWithZone <null>:111260140 (libobjc.A.dylib:arm64+0x171b0)
    #2 dispatch_once <null>:111260140 (libclang_rt.tsan_iossim_dynamic.dylib:arm64+0x7130c)
    #3 -[MMEEventsManager locationManager] MMEEventsManager.m:600 (MapboxMobileEvents:arm64+0x55a1c)
    #4 -[MMEEventsManager sendTurnstileEvent] MMEEventsManager.m:345 (MapboxMobileEvents:arm64+0x4ed54)
    #5 closure #1 in NavigationEventsManager.start() <null>:111260140 (Example:arm64+0x10063dc9c)
    #6 partial apply for closure #1 in NavigationEventsManager.start() <null>:111260140 (Example:arm64+0x10063dcf4)
    #7 partial apply for thunk for @callee_guaranteed (@unowned Int) -> () <null>:111260140 (libswiftDispatch.dylib:arm64+0x42f4)
    #8 _dispatch_client_callout2 <null>:111260140 (libdispatch.dylib:arm64+0x5858)
    #9 _swift_dispatch_apply_current <null>:111260140 (libswiftDispatch.dylib:arm64+0x43a0)
    #10 NavigationEventsManager.init(activeNavigationDataSource:passiveNavigationDataSource:accessToken:mobileEventsManager:) <null>:111260140 (Example:arm64+0x10063c404)
    #11 NavigationEventsManager.__allocating_init(activeNavigationDataSource:passiveNavigationDataSource:accessToken:mobileEventsManager:) <null>:111260140 (Example:arm64+0x10063beac)
    #12 PassiveLocationManager.init(directions:systemLocationManager:eventsManagerType:userInfo:) <null>:111260140 (Example:arm64+0x10066b38c)
    #13 PassiveLocationManager.__allocating_init(directions:systemLocationManager:eventsManagerType:userInfo:) <null>:111260140 (Example:arm64+0x10066acac)
    #14 ViewController.setupPassiveLocationProvider() ViewController+FreeDrive.swift:16 (Example:arm64+0x10003c204)
    #15 ViewController.configure(_:) ViewController.swift:146 (Example:arm64+0x10000d37c)
    #16 ViewController.navigationMapView.didset ViewController.swift:44 (Example:arm64+0x100007130)
    #17 ViewController.navigationMapView.setter ViewController.swift (Example:arm64+0x10000755c)
    #18 ViewController.viewWillAppear(_:) ViewController.swift:132 (Example:arm64+0x10000cacc)
    #19 @objc ViewController.viewWillAppear(_:) <compiler-generated> (Example:arm64+0x10000d0a8)
    #20 -[UIViewController _setViewAppearState:isAnimating:] <null>:111260140 (UIKitCore:arm64+0x4bf260)
    #21 <null> <null> (0x000106695c04)

  Thread T6 (tid=10256305, running) is a GCD worker thread

SUMMARY: ThreadSanitizer: data race MMELocationManager.m:42 in -[MMELocationManager locationManager]
==================
ThreadSanitizer report breakpoint hit. Use 'thread info -s' to get extended information about the report.
==================
WARNING: ThreadSanitizer: data race (pid=55699)
  Write of size 8 at 0x00010aa3a180 by thread T20:
    #0 -[MMEMetrics setEventCountTotal:] MMEMetrics.h (MapboxMobileEvents:arm64+0x169cc)
    #1 -[MMEMetricsManager updateMetricsFromEventQueue:] MMEMetricsManager.m:124 (MapboxMobileEvents:arm64+0x25f88)
    #2 -[MMEAPIClient postEvents:completionHandler:] MMEAPIClient.m:76 (MapboxMobileEvents:arm64+0x2d440)
    #3 -[MMEAPIClient postEvent:completionHandler:] MMEAPIClient.m:113 (MapboxMobileEvents:arm64+0x2e3fc)
    #4 __38-[MMEEventsManager sendTurnstileEvent]_block_invoke MMEEventsManager.m:361 (MapboxMobileEvents:arm64+0x4f724)
    #5 __tsan::invoke_and_release_block(void*) <null>:111260140 (libclang_rt.tsan_iossim_dynamic.dylib:arm64+0x70514)
    #6 _dispatch_client_callout <null>:111260140 (libdispatch.dylib:arm64+0x581c)

  Previous read of size 8 at 0x00010aa3a180 by thread T10:
    #0 -[MMEMetrics eventCountTotal] MMEMetrics.h:19 (MapboxMobileEvents:arm64+0x16954)
    #1 -[MMEMetricsManager attributes] MMEMetricsManager.m:248 (MapboxMobileEvents:arm64+0x29938)
    #2 -[MMEMetricsManager generateTelemetryMetricsEvent] MMEMetricsManager.m:300 (MapboxMobileEvents:arm64+0x2bc0c)

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Mobile Telemetry Issues Guide