Swift race access & stack buffer overflow

[ladeiko]

Used memory sanitizer in xcode, and got crash:

Crashed Thread: 13 Dispatch queue: com.apple.root.default-qos

abort() called
CoreSimulator 732.17 - Device: iPhone 8 (88037FF6-637E-4827-B62A-4BD2AD70CCE6) - Runtime: iOS 12.2 (16E226) - DeviceType: iPhone 8

Exception Type: EXC_CRASH (SIGABRT)
Exception Codes: 0x0000000000000000, 0x0000000000000000
Exception Note: EXC_CORPSE_NOTIFY

Application Specific Information:
==49420==WARNING: ASan is ignoring requested __asan_handle_no_return: stack top: 0x700004312000; bottom 0x10013c25e000; size: 0x5ffec80b4000 (105547882512384)
False positive error reports may follow

SUMMARY: AddressSanitizer: stack-buffer-overflow (/Users/admin/Library/Developer/CoreSimulator/Devices/88037FF6-637E-4827-B62A-4BD2AD70CCE6/data/Containers/Bundle/Application/F8151562-99F5-44CC-8239-92715B85CBED/MyApp.app/Frameworks/libclang_rt.asan_iossim_dynamic.dylib:x86_64+0x17e70) in wrap_memcpy+0x3a0
Shadow bytes around the buggy address:
0x020155643f40: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x020155643f50: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x020155643f60: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x020155643f70: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x020155643f80: 00 00 00 00 00 00 00 00 00 00 00 00 f1 f1 f1 f1
=>0x020155643f90:[01]f3 f3 f3 00 00 00 00 00 00 00 00 00 00 00 00
0x020155643fa0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x020155643fb0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x020155643fc0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x020155643fd0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x020155643fe0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
Shadow byte legend (one shadow byte represents 8 application bytes):
Addressable: 00
Partially addressable: 01 02 03 04 05 06 07
Heap left redzone: fa
Freed heap region: fd
Stack left redzone: f1
Stack mid redzone: f2
Stack right redzone: f3
Stack after return: f5
Stack use after scope: f8
Global redzone: f9
Global init order: f6
Poisoned by user: f7
Container overflow: fc
Array cookie: ac
Intra object redzone: bb
ASan internal: fe
Left alloca redzone: ca
Right alloca redzone: cb
Shadow gap: cc
==49420==ABORTING

Thread 13 Crashed:: Dispatch queue: com.apple.root.default-qos
0 libsystem_kernel.dylib 0x000000011029b33a __pthread_kill + 10
1 libsystem_pthread.dylib 0x00000001102f8e60 pthread_kill + 430
2 libsystem_c.dylib 0x000000011005e0bc __abort + 144
3 libsystem_c.dylib 0x000000011005e02c abort + 142
4 libclang_rt.asan_iossim_dynamic.dylib 0x0000000104024d06 __sanitizer::Abort() + 70
5 libclang_rt.asan_iossim_dynamic.dylib 0x00000001040246f4 __sanitizer::Die() + 196
6 libclang_rt.asan_iossim_dynamic.dylib 0x000000010400c374 __asan::ScopedInErrorReport::~ScopedInErrorReport() + 420
7 libclang_rt.asan_iossim_dynamic.dylib 0x000000010400bc0e __asan::ReportGenericError(unsigned long, unsigned long, unsigned long, unsigned long, bool, unsigned long, unsigned int, bool) + 1198
8 libclang_rt.asan_iossim_dynamic.dylib 0x0000000103fdbe90 wrap_memcpy + 960
9 org.cocoapods.SwiftCoroutine 0x000000010b657f45 SharedCoroutine.saveStack() + 2053 (SharedCoroutine.swift:78)
10 org.cocoapods.SwiftCoroutine 0x000000010b65fb97 SharedCoroutineQueue.start(dispatcher:scheduler:task:) + 1143 (SharedCoroutineQueue.swift:38)
11 org.cocoapods.SwiftCoroutine 0x000000010b65cba3 closure #1 in SharedCoroutineDispatcher.execute(on:task:) + 579 (SharedCoroutineDispatcher.swift:27)
12 org.cocoapods.SwiftCoroutine 0x000000010b623821 thunk for @escaping @callee_guaranteed () -> () + 145
13 libclang_rt.asan_iossim_dynamic.dylib 0x00000001040049cb __wrap_dispatch_async_block_invoke + 203
14 libdispatch.dylib 0x000000010ff02d7f _dispatch_call_block_and_release + 12
15 libdispatch.dylib 0x000000010ff03db5 _dispatch_client_callout + 8
16 libdispatch.dylib 0x000000010ff067b9 _dispatch_queue_override_invoke + 1022
17 libdispatch.dylib 0x000000010ff14632 _dispatch_root_queue_drain + 351
18 libdispatch.dylib 0x000000010ff14fca _dispatch_worker_thread2 + 130
19 libsystem_pthread.dylib 0x00000001102f59f7 _pthread_wqthread + 220
20 libsystem_pthread.dylib 0x00000001102f4b77 start_wqthread + 15

WARNING: ThreadSanitizer: Swift access race (pid=51212)
Modifying access of Swift variable at 0x7b1000453c18 by thread T19:
#0 $s14SwiftCoroutine8CoFutureC11addCallbackyyys6ResultOyxs5Error_pGcF (SwiftCoroutine:x86_64+0x2bf68)
#1 $s14SwiftCoroutine8CoFutureC12whenCanceledyyyycF (SwiftCoroutine:x86_64+0x33b15)
#2 $s14SwiftCoroutine0B9SchedulerPAAE15coroutineFutureyAA02CoE0Cyqd__Gqd__yKclFyycfU_ (SwiftCoroutine:x86_64+0x4108d)
#3 $s14SwiftCoroutine0B9SchedulerPAAE15coroutineFutureyAA02CoE0Cyqd__Gqd__yKclFyycfU_TA (SwiftCoroutine:x86_64+0x41445)
#4 $s14SwiftCoroutine0B7ContextC12performBlock33_474932A1564BFE56FB9333EE19D4C48CLLSvyF (SwiftCoroutine:x86_64+0x3d172)
#5 $s14SwiftCoroutine0B7ContextC5startSbyFySVSgcfU_ (SwiftCoroutine:x86_64+0x3d010)
#6 $s14SwiftCoroutine0B7ContextC5startSbyFySVSgcfU_To (SwiftCoroutine:x86_64+0x3d330)
#7 start (SwiftCoroutine:x86_64+0x3ffa)
#8 $s14SwiftCoroutine0B7ContextC5startSbyF (SwiftCoroutine:x86_64+0x3ce5e)
#9 $s14SwiftCoroutine06SharedB0C5startAA0cB5QueueC15CompletionStateOyFAHyXEfU_SbycAA0B7ContextCcfu_Sbycfu0 (SwiftCoroutine:x86_64+0x4b17d)
#10 $s14SwiftCoroutine06SharedB0C5startAA0cB5QueueC15CompletionStateOyFAHyXEfU_SbycAA0B7ContextCcfu_Sbycfu0_TA (SwiftCoroutine:x86_64+0x4ea9d)
#11 $s14SwiftCoroutine06SharedB0C7perform33_5CCAB8CB89EE233ADAF37DFE55B1ABD1LLyAA0cB5QueueC15CompletionStateOSbyXEF (SwiftCoroutine:x86_64+0x4b21f)
#12 $s14SwiftCoroutine06SharedB0C5startAA0cB5QueueC15CompletionStateOyFAHyXEfU (SwiftCoroutine:x86_64+0x4b046)
#13 $s14SwiftCoroutine06SharedB0C5startAA0cB5QueueC15CompletionStateOyFAHyXEfU_TA (SwiftCoroutine:x86_64+0x4b0ad)
#14 $s14SwiftCoroutine06SharedB5QueueC15CompletionStateOIgd_AEIegr_TR (SwiftCoroutine:x86_64+0x4b4bb)
#15 $s14SwiftCoroutine06SharedB5QueueC15CompletionStateOIgd_AEIegr_TRTA (SwiftCoroutine:x86_64+0x4b52d)
#16 $s14SwiftCoroutine0B8ProtocolPAAE16performAsCurrentyqd__qd__yXElF (SwiftCoroutine:x86_64+0x3eae7)
#17 $s14SwiftCoroutine06SharedB0C5startAA0cB5QueueC15CompletionStateOyF (SwiftCoroutine:x86_64+0x4af55)
#18 $s14SwiftCoroutine06SharedB5QueueC5start10dispatcher9scheduler4taskyAA0cB10DispatcherC_AA0B9Scheduler_pyyctF (SwiftCoroutine:x86_64+0x510e0)
#19 $s14SwiftCoroutine06SharedB10DispatcherC7execute2on4taskyAA0B9Scheduler_p_yyctFyycfU_ (SwiftCoroutine:x86_64+0x4f33b)
#20 $s14SwiftCoroutine06SharedB10DispatcherC7execute2on4taskyAA0B9Scheduler_p_yyctFyycfU_TA (SwiftCoroutine:x86_64+0x4f414)
#21 $sIeg_IeyB_TR (SwiftCoroutine:x86_64+0x2eec3)
#22 __tsan::invoke_and_release_block(void*) (libclang_rt.tsan_iossim_dynamic.dylib:x86_64+0x70f1b)
#23 _dispatch_client_callout (libdispatch.dylib:x86_64+0x3db4)

Previous read of size 8 at 0x7b1000453c18 by thread T18:
#0 $s14SwiftCoroutine13CallbackStackV6appendySbyxcF (SwiftCoroutine:x86_64+0x1e035)
#1 $s14SwiftCoroutine8CoFutureC11addCallbackyyys6ResultOyxs5Error_pGcF (SwiftCoroutine:x86_64+0x2bfc4)
#2 $s14SwiftCoroutine8CoFutureC5awaitxyKFs6ResultOyxs5Error_pGyKXEfu_yyAHccACyxGcfu0_yyAHccfu1_ (SwiftCoroutine:x86_64+0x2d7a6)
#3 $s14SwiftCoroutine8CoFutureC5awaitxyKFs6ResultOyxs5Error_pGyKXEfu_yyAHccACyxGcfu0_yyAHccfu1_TA (SwiftCoroutine:x86_64+0x2f800)
#4 $ss6ResultOyxs5Error_pGlyxIsegn_Igg_xlyADIsegn_Iegg_lTR (SwiftCoroutine:x86_64+0x2d814)
#5 $ss6ResultOyxs5Error_pGlyxIsegn_Igg_xlyADIsegn_Iegg_lTRTA.1 (SwiftCoroutine:x86_64+0x2f7a6)
#6 $s14SwiftCoroutine06SharedB0C5awaityxyyxcXEKlF (SwiftCoroutine:x86_64+0x4d200)
#7 $s14SwiftCoroutine06SharedB0CAA0B8ProtocolA2aDP5awaityqd__yyqd__cXEKlFTW (SwiftCoroutine:x86_64+0x4e53a)
#8 $s14SwiftCoroutine8CoFutureC5awaitxyKFs6ResultOyxs5Error_pGyKXEfu_ (SwiftCoroutine:x86_64+0x2d4e5)
#9 $s14SwiftCoroutine8CoFutureC5awaitxyKFs6ResultOyxs5Error_pGyKXEfu_TA (SwiftCoroutine:x86_64+0x2d62f)
#10 $s14SwiftCoroutine8CoFutureC5awaitxyKF (SwiftCoroutine:x86_64+0x2d0f9)
#11 $s5MyApp19EntitiesServiceImplC4boot13launchOptions10completionySDySo019UIApplicationLaunchG3KeyaypGSg_y13ViperServices0lC10BootResultOctFyycfU_ (MyApp:x86_64+0x1004a07be)
#12 $s5MyApp19EntitiesServiceImplC4boot13launchOptions10completionySDySo019UIApplicationLaunchG3KeyaypGSg_y13ViperServices0lC10BootResultOctFyycfU_TA (MyApp:x86_64+0x1004a1449)
#13 $s14SwiftCoroutine0B9SchedulerPAAE05startB02in4taskyAA7CoScopeCSg_yyKctFyycfU_ (SwiftCoroutine:x86_64+0x3ffe6)
#14 $s14SwiftCoroutine0B9SchedulerPAAE05startB02in4taskyAA7CoScopeCSg_yyKctFyycfU_TA (SwiftCoroutine:x86_64+0x400f5)
#15 $s14SwiftCoroutine0B7ContextC12performBlock33_474932A1564BFE56FB9333EE19D4C48CLLSvyF (SwiftCoroutine:x86_64+0x3d172)
#16 $s14SwiftCoroutine0B7ContextC5startSbyFySVSgcfU_ (SwiftCoroutine:x86_64+0x3d010)
#17 $s14SwiftCoroutine0B7ContextC5startSbyFySVSgcfU_To (SwiftCoroutine:x86_64+0x3d330)
#18 start (SwiftCoroutine:x86_64+0x3ffa)
#19 $s14SwiftCoroutine0B7ContextC5startSbyF (SwiftCoroutine:x86_64+0x3ce5e)
#20 $s14SwiftCoroutine06SharedB0C5startAA0cB5QueueC15CompletionStateOyFAHyXEfU_SbycAA0B7ContextCcfu_Sbycfu0 (SwiftCoroutine:x86_64+0x4b17d)
#21 $s14SwiftCoroutine06SharedB0C5startAA0cB5QueueC15CompletionStateOyFAHyXEfU_SbycAA0B7ContextCcfu_Sbycfu0_TA (SwiftCoroutine:x86_64+0x4ea9d)
#22 $s14SwiftCoroutine06SharedB0C7perform33_5CCAB8CB89EE233ADAF37DFE55B1ABD1LLyAA0cB5QueueC15CompletionStateOSbyXEF (SwiftCoroutine:x86_64+0x4b21f)
#23 $s14SwiftCoroutine06SharedB0C5startAA0cB5QueueC15CompletionStateOyFAHyXEfU (SwiftCoroutine:x86_64+0x4b046)
#24 $s14SwiftCoroutine06SharedB0C5startAA0cB5QueueC15CompletionStateOyFAHyXEfU_TA (SwiftCoroutine:x86_64+0x4b0ad)
#25 $s14SwiftCoroutine06SharedB5QueueC15CompletionStateOIgd_AEIegr_TR (SwiftCoroutine:x86_64+0x4b4bb)
#26 $s14SwiftCoroutine06SharedB5QueueC15CompletionStateOIgd_AEIegr_TRTA (SwiftCoroutine:x86_64+0x4b52d)
#27 $s14SwiftCoroutine0B8ProtocolPAAE16performAsCurrentyqd__qd__yXElF (SwiftCoroutine:x86_64+0x3eae7)
#28 $s14SwiftCoroutine06SharedB0C5startAA0cB5QueueC15CompletionStateOyF (SwiftCoroutine:x86_64+0x4af55)
#29 $s14SwiftCoroutine06SharedB5QueueC5start10dispatcher9scheduler4taskyAA0cB10DispatcherC_AA0B9Scheduler_pyyctF (SwiftCoroutine:x86_64+0x510e0)
#30 $s14SwiftCoroutine06SharedB10DispatcherC7execute2on4taskyAA0B9Scheduler_p_yyctFyycfU_ (SwiftCoroutine:x86_64+0x4f33b)
ThreadSanitizer report breakpoint hit. Use 'thread info -s' to get extended information about the report.
A 0
#31 $s14SwiftCoroutine06SharedB10DispatcherC7execute2on4taskyAA0B9Scheduler_p_yyctFyycfU_TA (SwiftCoroutine:x86_64+0x4f414)
#32 $sIeg_IeyB_TR (SwiftCoroutine:x86_64+0x2eec3)
#33 __tsan::invoke_and_release_block(void*) (libclang_rt.tsan_iossim_dynamic.dylib:x86_64+0x70f1b)
#34 _dispatch_client_callout (libdispatch.dylib:x86_64+0x3db4)

Location is heap block of size 64 at 0x7b1000453c00 allocated by thread T18:
#0 malloc (libclang_rt.tsan_iossim_dynamic.dylib:x86_64+0x4ef1a)
#1 swift_slowAlloc (libswiftCore.dylib:x86_64+0x2ce3c8)
#2 $s14SwiftCoroutine9CoPromiseCACyxGycfC (SwiftCoroutine:x86_64+0x3784f)
#3 $s14SwiftCoroutine0B9SchedulerPAAE15coroutineFutureyAA02CoE0Cyqd__Gqd__yKclF (SwiftCoroutine:x86_64+0x40bb6)
#4 $s5MyApp19EntitiesServiceImplC16loadStoryEffects33_CF1F1424D0659537F27DBA3EFCD861E7LL14SwiftCoroutine8CoFutureCyytGyF (MyApp:x86_64+0x1004d8677)
#5 $s5MyApp19EntitiesServiceImplC4boot13launchOpt[DefaultViperServicesContainer]: Still booting ["StateService", "ApphudService", "AnalyticsService", "ExtensionService", "GdprService", "PremiumService", "SmartNewsService", "PushNotificationsService"]ions10completionySDySo019UIApplicationLaunchG3KeyaypGSg_y13ViperServices0lC10BootResultOctFyycfU_ (MyApp:x86_64+0x1004a0791)
#6 $s5MyApp19EntitiesServiceImplC4boot13launchOptions10completionySDySo019UIApplicationLaunchG3KeyaypGSg_y13ViperServices0lC10BootResultOctFyycfU_TA (MyApp:x86_64+0x1004a1449)
#7 $s14SwiftCoroutine0B9SchedulerPAAE05startB02in4taskyAA7CoScopeCSg_yyKctFyycfU_ (SwiftCoroutine:x86_64+0x3ffe6)
#8 $s14SwiftCoroutine0B9SchedulerPAAE05startB02in4taskyAA7CoScopeCSg_yyKctFyycfU_TA (SwiftCoroutine:x86_64+0x400f5)
#9 $s14SwiftCoroutine0B7ContextC12performBlock33_474932A1564BFE56FB9333EE19D4C48CLLSvyF (SwiftCoroutine:x86_64+0x3d172)
#10 $s14SwiftCoroutine0B7ContextC5startSbyFySVSgcfU_ (SwiftCoroutine:x86_64+0x3d010)
#11 $s14SwiftCoroutin
e0B7ContextC5startSbyFySVSgcfU_To (SwiftCoroutine:x86_64+0x3d330)
#12 start (SwiftCoroutine:x86_64+0x3ffa)
#13 $s14SwiftCoroutine0B7ContextC5startSbyF (SwiftCoroutine:x86_64+0x3ce5e)
#14 $s14SwiftCoroutine06SharedB0C5startAA0cB5QueueC15CompletionStateOyFAHyXEfU_SbycAA0B7ContextCcfu_Sbycfu0 (SwiftCoroutine:x86_64+0x4b17d)
#15 $s14SwiftCoroutine06SharedB0C5startAA0cB5QueueC15CompletionStateOyFAHyXEfU_SbycAA0B7ContextCcfu_Sbycfu0_TA (SwiftCoroutine:x86_64+0x4ea9d)
#16 $s14SwiftCoroutine06SharedB0C7perform33_5CCAB8CB89EE233ADAF37DFE55B1ABD1LLyAA0cB5QueueC15CompletionStateOSbyXEF (SwiftCoroutine:x86_64+0x4b21f)
#17 $s14SwiftCoroutine06SharedB0C5startAA0cB5QueueC15CompletionStateOyFAHyXEfU (SwiftCoroutine:x86_64+0x4b046)
#18 $s14SwiftCoroutine06SharedB0C5startAA0cB5QueueC15CompletionStateOyFAHyXEfU_TA (SwiftCoroutine:x86_64+0x4b0ad)
#19 $s14SwiftCoroutine06SharedB5QueueC15CompletionStateOIgd_AEIegr_TR (SwiftCoroutine:x86_64+0x4b4bb)
#20 $s14SwiftCoroutine06SharedB5QueueC15CompletionStateOIgd_AEIegr_TRTA (SwiftCoroutine:x86_64+0x4b52d)
#21 $s14SwiftCoroutine0B8ProtocolPAAE16performAsCurrentyqd__qd__yXElF (SwiftCoroutine:x86_64+0x3eae7)
#22 $s14SwiftCoroutine06SharedB0C5startAA0cB5QueueC15CompletionStateOyF (SwiftCoroutine:x86_64+0x4af55)
#23 $s14SwiftCoroutine06SharedB5QueueC5start10dispatcher9scheduler4taskyAA0cB10DispatcherC_AA0B9Scheduler_pyyctF (SwiftCoroutine:x86_64+0x510e0)
#24 $s14SwiftCoroutine06SharedB10DispatcherC7execute2on4taskyAA0B9Scheduler_p_yyctFyycfU_ (SwiftCoroutine:x86_64+0x4f33b)
#25 $s14SwiftCoroutine06SharedB10DispatcherC7execute2on4taskyAA0B9Scheduler_p_yyctFyycfU_TA (SwiftCoroutine:x86_64+0x4f414)
#26 $sIeg_IeyB_TR (SwiftCoroutine:x86_64+0x2eec3)
#27 __tsan::invoke_and_release_block(void*) (libclang_rt.tsan_iossim_dynamic.dylib:x86_64+0x70f1b)
#28 _dispatch_client_callout (libdispatch.dylib:x86_64+0x3db4)

Thread T19 (tid=5147481, running) is a GCD worker thread

Thread T18 (tid=5147475, running) is a GCD worker thread

SUMMARY: ThreadSanitizer: Swift access race (/Users/admin/Library/Developer/CoreSimulator/Devices/88037FF6-637E-4827-B62A-4BD2AD70CCE6/data/Containers/Bundle/Application/89A141C1-2DC8-4A6C-B3DB-65CC1E2A08F7/MyApp.app/Frameworks/SwiftCoroutine.framework/SwiftCoroutine:x86_64+0x2bf68) in $s14SwiftCoroutine8CoFutureC11addCallbackyyys6ResultOyxs5Error_pGcF+0x1f8

ThreadSanitizer report breakpoint hit. Use 'thread info -s' to get extended information about the report.

WARNING: ThreadSanitizer: Swift access race (pid=51212)
Modifying access of Swift variable at 0x7b140011cb70 by thread T18:
#0 $s14SwiftCoroutine06SharedB10DispatcherC4pushyyAA0cB5QueueCF (SwiftCoroutine:x86_64+0x4f912)
#1 $s14SwiftCoroutine06SharedB5QueueC11performNext022_8C5C69B88B6EDEB22EAD6G9DF7AA0AADLL3foryAA0cB10DispatcherC_tF (SwiftCoroutine:x86_64+0x522d2)
#2 $s14SwiftCoroutine06SharedB5QueueC8complete022_8C5C69B88B6EDEB22EAD6F9DF7AA0AADLL4withyAC15CompletionStateO_tF (SwiftCoroutine:x86_64+0x5160c)
#3 $s14SwiftCoroutine06SharedB5QueueC5start10dispatcher9scheduler4taskyAA0cB10DispatcherC_AA0B9Scheduler_pyyctF (SwiftCoroutine:x86_64+0x51109)
#4 $s14SwiftCoroutine0B7ContextC12performBlock33_474932A1564BFE56FB9333EE19D4C48CLLSvyF (SwiftCoroutine:x86_64+0x3d172)
#5 $s14SwiftCoroutine0B7ContextC5startSbyFySVSgcfU_ (SwiftCoroutine:x86_64+0x3d010)
#6 $s14SwiftCoroutine0B7ContextC5startSbyFySVSgcfU_To (SwiftCoroutine:x86_64+0x3d330)
#7 start (SwiftCoroutine:x86_64+0x3ffa)
#8 $s14SwiftCoroutine0B7ContextC5startSbyF (SwiftCoroutine:x86_64+0x3ce5e)
#9 $s14SwiftCoroutine06SharedB0C5startAA0cB5QueueC15CompletionStateOyFAHyXEfU_SbycAA0B7ContextCcfu_Sbycfu0 (SwiftCoroutine:x86_64+0x4b17d)
#10 $s14SwiftCoroutine06SharedB0C5startAA0cB5QueueC15CompletionStateOyFAHyXEfU_SbycAA0B7ContextCcfu_Sbycfu0_TA (SwiftCoroutine:x86_64+0x4ea9d)
#11 $s14SwiftCoroutine06SharedB0C7perform33_5CCAB8CB89EE233ADAF37DFE55B1ABD1LLyAA0cB5QueueC15CompletionStateOSbyXEF (SwiftCoroutine:x86_64+0x4b21f)
#12 $s14SwiftCoroutine06SharedB0C5startAA0cB5QueueC15CompletionStateOyFAHyXEfU (SwiftCoroutine:x86_64+0x4b046)
#13 $s14SwiftCoroutine06SharedB0C5startAA0cB5QueueC15CompletionStateOyFAHyXEfU_TA (SwiftCoroutine:x86_64+0x4b0ad)
#14 $s14SwiftCoroutine06SharedB5QueueC15CompletionStateOIgd_AEIegr_TR (SwiftCoroutine:x86_64+0x4b4bb)
#15 $s14SwiftCoroutine06SharedB5QueueC15CompletionStateOIgd_AEIegr_TRTA (SwiftCoroutine:x86_64+0x4b52d)
#16 $s14SwiftCoroutine0B8ProtocolPAAE16performAsCurrentyqd__qd__yXElF (SwiftCoroutine:x86_64+0x3eae7)
#17 $s14SwiftCoroutine06SharedB0C5startAA0cB5QueueC15CompletionStateOyF (SwiftCoroutine:x86_64+0x4af55)
#18 $s14SwiftCoroutine06SharedB5QueueC5start10dispatcher9scheduler4taskyAA0cB10DispatcherC_AA0B9Scheduler_pyyctF (SwiftCoroutine:x86_64+0x510e0)
#19 $s14SwiftCoroutine06SharedB10DispatcherC7execute2on4taskyAA0B9Scheduler_p_yyctFyycfU_ (SwiftCoroutine:x86_64+0x4f33b)
#20 $s14SwiftCoroutine06SharedB10DispatcherC7execute2on4taskyAA0B9Scheduler_p_yyctFyycfU_TA (SwiftCoroutine:x86_64+0x4f414)
#21 $sIeg_IeyB_TR (SwiftCoroutine:x86_64+0x2eec3)
#22 __tsan::invoke_and_release_block(void*) (libclang_rt.tsan_iossim_dynamic.dylib:x86_64+0x70f1b)
#23 _dispatch_client_callout (libdispatch.dylib:x86_64+0x3db4)

Previous modifying access of Swift variable at 0x7b140011cb70 by thread T19:
#0 $s14SwiftCoroutine9FifoQueueV3popxSgyF (SwiftCoroutine:x86_64+0x474bf)
#1 $s14SwiftCoroutine06SharedB10DispatcherC12getFreeQueue33_1A5FB05E2411224CDC4772F9B26581BDLLAA0cbG0CyF (SwiftCoroutine:x86_64+0x4f50d)
#2 $s14SwiftCoroutine06SharedB10DispatcherC7execute2on4taskyAA0B9Scheduler_p_yyctFyycfU_ (SwiftCoroutine:x86_64+0x4f31c)
#3 $s14SwiftCoroutine06SharedB10DispatcherC7execute2on4taskyAA0B9Scheduler_p_yyctFyycfU_TA (SwiftCoroutine:x86_64+0x4f414)
#4 $sIeg_IeyB_TR (SwiftCoroutine:x86_64+0x2eec3)
#5 __tsan::invoke_and_release_block(void*) (libclang_rt.tsan_iossim_dynamic.dylib:x86_64+0x70f1b)
#6 _dispatch_client_callout (libdispatch.dylib:x86_64+0x3db4)

Location is heap block of size 72 at 0x7b140011cb50 allocated by main thread:
#0 malloc (libclang_rt.tsan_iossim_dynamic.dylib:x86_64+0x4ef1a)
#1 swift_slowAlloc (libswiftCore.dylib:x86_64+0x2ce3c8)
#2 globalinit_33_1A5FB05E2411224CDC4772F9B26581BD_func0 (SwiftCoroutine:x86_64+0x4eb5b)
#3 dispatch_once (libclang_rt.tsan_iossim_dynamic.dylib:x86_64+0x71794)
#4 dispatch_once_f (libclang_rt.tsan_iossim_dynamic.dylib:x86_64+0x71880)
#5 swift_once (libswiftCore.dylib:x86_64+0x2f0578)
#6 $s14SwiftCoroutine0B9SchedulerPAAE06_startB0yyyycF (SwiftCoroutine:x86_64+0x3fb20)
#7 $s14SwiftCoroutine0B9SchedulerPAAE05startB02in4taskyAA7CoScopeCSg_yyKctF (SwiftCoroutine:x86_64+0x3ff2c)
#8 $s5MyApp19EntitiesServiceImplC4boot13launchOptions10completionySDySo019UIApplicationLaunchG3KeyaypGSg_y13ViperServices0lC10BootResultOctF (MyApp:x86_64+0x1004a04ca)
#9 $s5MyApp19EntitiesServiceImplC13ViperServices0eC0AadEP4boot13launchOptions10completionySDySo019UIApplicationLaunchI3KeyaypGSg_yAD0eC10BootResultOctFTW (MyApp:x86_64+0x1004e3e88)
#10 $s13ViperServices07DefaultaB9ContainerC4boot13launchOptions10completionySDySo019UIApplicationLaunchG3KeyaypGSg_yAA0abD10BootResultOctFyyyccfU_0E4NextL_yyFyycfU3_ (ViperServices:x86_64+0xff28)
#11 $s13ViperServices07DefaultaB9ContainerC4boot13launchOptions10completionySDySo019UIApplicationLaunchG3KeyaypGSg_yAA0abD10BootResultOctFyyyccfU_0E4NextL_yyFyycfU3_TA (ViperServices:x86_64+0x1c58c)
#12 $s13ViperServices07DefaultaB9ContainerC4boot13launchOptions10completionySDySo019UIApplicationLaunchG3KeyaypGSg_yAA0abD10BootResultOctFyyyccfU_0E4NextL_yyFyycfU4_ (ViperServices:x86_64+0x112f7)
#13 $s13ViperServices07DefaultaB9ContainerC4boot13launchOptions10completionySDySo019UIApplicationLaunchG3KeyaypGSg_yAA0abD10BootResultOctFyyyccfU_0E4NextL_yyFyycfU4_TA (ViperServices:x86_64+0x1c625)
#14 $sIeg_IeyB_TR (ViperServices:x86_64+0x11393)
#15 __tsan::invoke_and_release_block(void*) (libclang_rt.tsan_iossim_dynamic.dylib:x86_64+0x70f1b)
#16 _dispatch_client_callout (libdispatch.dylib:x86_64+0x3db4)
#17 start (libdyld.dylib:x86_64+0x1540)

Thread T18 (tid=5147475, running) is a GCD worker thread

Thread T19 (tid=5147481, running) is a GCD worker thread

SUMMARY: ThreadSanitizer: Swift access race (/Users/admin/Library/Developer/CoreSimulator/Devices/88037FF6-637E-4827-B62A-4BD2AD70CCE6/data/Containers/Bundle/Application/89A141C1-2DC8-4A6C-B3DB-65CC1E2A08F7/MyApp.app/Frameworks/SwiftCoroutine.framework/SwiftCoroutine:x86_64+0x4f912) in $s14SwiftCoroutine06SharedB10DispatcherC4pushyyAA0cB5QueueCF+0x222

ThreadSanitizer report breakpoint hit. Use 'thread info -s' to get extended information about the report.

WARNING: ThreadSanitizer: Swift access race (pid=51212)
Modifying access of Swift variable at 0x7b140011cb80 by thread T18:
#0 $s14SwiftCoroutine9FifoQueueV4pushyyxF (SwiftCoroutine:x86_64+0x45dff)
#1 $s14SwiftCoroutine06SharedB10DispatcherC4pushyyAA0cB5QueueCF (SwiftCoroutine:x86_64+0x4f934)
#2 $s14SwiftCoroutine06SharedB5QueueC11performNext022_8C5C69B88B6EDEB22EAD6G9DF7AA0AADLL3foryAA0cB10DispatcherC_tF (SwiftCoroutine:x86_64+0x522d2)
#3 $s14SwiftCoroutine06SharedB5QueueC8complete022_8C5C69B88B6EDEB22EAD6F9DF7AA0AADLL4withyAC15CompletionStateO_tF (SwiftCoroutine:x86_64+0x5160c)
#4 $s14SwiftCoroutine06SharedB5QueueC5start10dispatcher9scheduler4taskyAA0cB10DispatcherC_AA0B9Scheduler_pyyctF (SwiftCoroutine:x86_64+0x51109)
#5 $s14SwiftCoroutine0B7ContextC12performBlock33_474932A1564BFE56FB9333EE19D4C48CLLSvyF (SwiftCoroutine:x86_64+0x3d172)
#6 $s14SwiftCoroutine0B7ContextC5startSbyFySVSgcfU_ (SwiftCoroutine:x86_64+0x3d010)
#7 $s14SwiftCoroutine0B7ContextC5startSbyFySVSgcfU_To (SwiftCoroutine:x86_64+0x3d330)
#8 start (SwiftCoroutine:x86_64+0x3ffa)
#9 $s14SwiftCoroutine0B7ContextC5startSbyF (SwiftCoroutine:x86_64+0x3ce5e)
#10 $s14SwiftCoroutine06SharedB0C5startAA0cB5QueueC15CompletionStateOyFAHyXEfU_SbycAA0B7ContextCcfu_Sbycfu0 (SwiftCoroutine:x86_64+0x4b17d)
#11 $s14SwiftCoroutine06SharedB0C5startAA0cB5QueueC15CompletionStateOyFAHyXEfU_SbycAA0B7ContextCcfu_Sbycfu0_TA (SwiftCoroutine:x86_64+0x4ea9d)
#12 $s14SwiftCoroutine06SharedB0C7perform33_5CCAB8CB89EE233ADAF37DFE55B1ABD1LLyAA0cB5QueueC15CompletionStateOSbyXEF (SwiftCoroutine:x86_64+0x4b21f)
#13 $s14SwiftCoroutine06SharedB0C5startAA0cB5QueueC15CompletionStateOyFAHyXEfU (SwiftCoroutine:x86_64+0x4b046)
#14 $s14SwiftCoroutine06SharedB0C5startAA0cB5QueueC15CompletionStateOyFAHyXEfU_TA (SwiftCoroutine:x86_64+0x4b0ad)
#15 $s14SwiftCoroutine06SharedB5QueueC15CompletionStateOIgd_AEIegr_TR (SwiftCoroutine:x86_64+0x4b4bb)
#16 $s14SwiftCoroutine06SharedB5QueueC15CompletionStateOIgd_AEIegr_TRTA (SwiftCoroutine:x86_64+0x4b52d)
#17 $s14SwiftCoroutine0B8ProtocolPAAE16performAsCurrentyqd__qd__yXElF (SwiftCoroutine:x86_64+0x3eae7)
#18 $s14SwiftCoroutine06SharedB0C5startAA0cB5QueueC15CompletionStateOyF (SwiftCoroutine:x86_64+0x4af55)
#19 $s14SwiftCoroutine06SharedB5QueueC5start10dispatcher9scheduler4taskyAA0cB10DispatcherC_AA0B9Scheduler_pyyctF (SwiftCoroutine:x86_64+0x510e0)
#20 $s14SwiftCoroutine06SharedB10DispatcherC7execute2on4taskyAA0B9Scheduler_p_yyctFyycfU_ (SwiftCoroutine:x86_64+0x4f33b)
#21 $s14SwiftCoroutine06SharedB10DispatcherC7execute2on4taskyAA0B9Scheduler_p_yyctFyycfU_TA (SwiftCoroutine:x86_64+0x4f414)
#22 $sIeg_IeyB_TR (SwiftCoroutine:x86_64+0x2eec3)
#23 __tsan::invoke_and_release_block(void*) (libclang_rt.tsan_iossim_dynamic.dylib:x86_64+0x70f1b)
#24 _dispatch_client_callout (libdispatch.dylib:x86_64+0x3db4)

Previous write of size 1 at 0x7b140011cb80 by thread T19:
[failed to restore the stack]

Location is heap block of size 72 at 0x7b140011cb50 allocated by main thread:
#0 malloc (libclang_rt.tsan_iossim_dynamic.dylib:x86_64+0x4ef1a)
#1 swift_slowAlloc (libswiftCore.dylib:x86_64+0x2ce3c8)
#2 globalinit_33_1A5FB05E2411224CDC4772F9B26581BD_func0 (SwiftCoroutine:x86_64+0x4eb5b)
#3 dispatch_once (libclang_rt.tsan_iossim_dynamic.dylib:x86_64+0x71794)
#4 dispatch_once_f (libclang_rt.tsan_iossim_dynamic.dylib:x86_64+0x71880)
#5 swift_once (libswiftCore.dylib:x86_64+0x2f0578)
#6 $s14SwiftCoroutine0B9SchedulerPAAE06_startB0yyyycF (SwiftCoroutine:x86_64+0x3fb20)
#7 $s14SwiftCoroutine0B9SchedulerPAAE05startB02in4taskyAA7CoScopeCSg_yyKctF (SwiftCoroutine:x86_64+0x3ff2c)
#8 $s5MyApp19EntitiesServiceImplC4boot13launchOptions10completionySDySo019UIApplicationLaunchG3KeyaypGSg_y13ViperServices0lC10BootResultOctF (MyApp:x86_64+0x1004a04ca)
#9 $s5MyApp19EntitiesServiceImplC13ViperServices0eC0AadEP4boot13launchOptions10completionySDySo019UIApplicationLaunchI3KeyaypGSg_yAD0eC10BootResultOctFTW (MyApp:x86_64+0x1004e3e88)
#10 $s13ViperServices07DefaultaB9ContainerC4boot13launchOptions10completionySDySo019UIApplicationLaunchG3KeyaypGSg_yAA0abD10BootResultOctFyyyccfU_0E4NextL_yyFyycfU3_ (ViperServices:x86_64+0xff28)
#11 $s13ViperServices07DefaultaB9ContainerC4boot13launchOptions10completionySDySo019UIApplicationLaunchG3KeyaypGSg_yAA0abD10BootResultOctFyyyccfU_0E4NextL_yyFyycfU3_TA (ViperServices:x86_64+0x1c58c)
#12 $s13ViperServices07DefaultaB9ContainerC4boot13launchOptions10completionySDySo019UIApplicationLaunchG3KeyaypGSg_yAA0abD10BootResultOctFyyyccfU_0E4NextL_yyFyycfU4_ (ViperServices:x86_64+0x112f7)
#13 $s13ViperServices07DefaultaB9ContainerC4boot13launchOptions10completionySDySo019UIApplicationLaunchG3KeyaypGSg_yAA0abD10BootResultOctFyyyccfU_0E4NextL_yyFyycfU4_TA (ViperServices:x86_64+0x1c625)
#14 $sIeg_IeyB_TR (ViperServices:x86_64+0x11393)
#15 __tsan::invoke_and_release_block(void*) (libclang_rt.tsan_iossim_dynamic.dylib:x86_64+0x70f1b)
#16 _dispatch_client_callout (libdispatch.dylib:x86_64+0x3db4)
#17 start (libdyld.dylib:x86_64+0x1540)

Thread T18 (tid=5147475, running) is a GCD worker thread

Thread T19 (tid=5147481, running) is a GCD worker thread

SUMMARY: ThreadSanitizer: Swift access race (/Users/admin/Library/Developer/CoreSimulator/Devices/88037FF6-637E-4827-B62A-4BD2AD70CCE6/data/Containers/Bundle/Application/89A141C1-2DC8-4A6C-B3DB-65CC1E2A08F7/MyApp.app/Frameworks/SwiftCoroutine.framework/SwiftCoroutine:x86_64+0x45dff) in $s14SwiftCoroutine9FifoQueueV4pushyyxF+0x38f

[belozierov]

It's look like that you use a lot of recursion calls? - #22

[ladeiko]

stack buffer overflow - it's possible.. But swift access race ....

[ladeiko]

anyway, thanks for help. will try to locate problem code