Catalyst crash on launch with thread sanitizer on

[girishw]

Step 0: Are you in the right place?

[REQUIRED] Step 1: Describe your environment

• Xcode version: 13.2.1
• Firebase SDK version: 8.10.0
• Installation method: CocoaPods
• Firebase Component: Core
• Target platform(s): All | iOS | Catalyst | macOS | tvOS | watchOS

[REQUIRED] Step 2: Describe the problem

Crash when trying to launch on MacOS 12.0.1 Catalyst after compiling with thread sanitizer on

I see the following :

libdispatch.dylib`_dlock_wait.cold.1:
    0x10efcdcf4 <+0>:  movl   %edi, %eax
    0x10efcdcf6 <+2>:  leaq   0x62ab(%rip), %rcx        ; "BUG IN LIBDISPATCH: ulock_wait() failed"
    0x10efcdcfd <+9>:  movq   %rcx, 0x33624(%rip)       ; gCRAnnotations + 8
    0x10efcdd04 <+16>: movq   %rax, 0x3364d(%rip)       ; gCRAnnotations + 56
->  0x10efcdd0b <+23>: ud2    

Thread 9: EXC_BAD_INSTRUCTION (code=EXC_I386_INVOP, subcode=0x0)

Thread 9 Queue : com.apple.network.connections (serial)
#0	0x000000010efcdd0b in _dlock_wait.cold.1 ()
#1	0x000000010ef951fa in _dlock_wait ()
#2	0x000000010ef9515c in _dispatch_once_wait ()
#3	0x00007ff8294c620d in nw_protocol_tcp_connect ()
#4	0x00007ff8200359e8 in nw_protocol_boringssl_connect ()
#5	0x00007ff820aeba67 in ___lldb_unnamed_symbol431$$CFNetwork ()
#6	0x00007ff820193de5 in nw_endpoint_flow_connect ()
#7	0x00007ff82015ed72 in nw_endpoint_flow_setup_protocols ()
#8	0x00007ff8202c0d4c in nw_endpoint_flow_setup_channel ()
#9	0x00007ff8201bc42e in -[NWConcrete_nw_endpoint_flow updatePathWithHandler:] ()
#10	0x00007ff820187bea in nw_endpoint_handler_path_change ()
#11	0x00007ff8201bb8bc in __nw_endpoint_handler_initialize_association_block_invoke ()
#12	0x00007ff8201bb7f2 in __nw_association_update_paths_block_invoke.74 ()
#13	0x00007ff8201ad9b1 in nw_hash_table_apply ()
#14	0x00007ff8201bb349 in nw_association_update_paths ()
#15	0x00007ff8201b6045 in nw_path_necp_update_evaluator ()
#16	0x00007ff8201b40f8 in nw_path_necp_check_for_updates ()
#17	0x00007ff8201b3b03 in nw_path_evaluator_force_update ()
#18	0x00007ff8201b37f4 in nw_association_force_update ()
#19	0x00007ff8202c25fd in nw_endpoint_flow_setup_channel ()
#20	0x00007ff82018e534 in -[NWConcrete_nw_endpoint_flow startWithHandler:] ()
#21	0x00007ff820189455 in nw_endpoint_handler_path_change ()
#22	0x00007ff820181240 in nw_endpoint_handler_start ()
#23	0x00007ff82022ae64 in nw_endpoint_resolver_start_next_child ()
#24	0x000000010e0670dc in __tsan::invoke_and_release_block(void*) ()
#25	0x000000010e066e32 in __tsan::dispatch_callback_wrap(void*) ()
#26	0x000000010ef94874 in _dispatch_client_callout ()
#27	0x000000010ef9e9be in _dispatch_workloop_invoke ()
#28	0x000000010efaad1d in _dispatch_workloop_worker_thread ()
#29	0x000000010f03b7e7 in _pthread_wqthread ()
#30	0x000000010f041ceb in start_wqthread ()
Enqueued from com.apple.network.connections (Thread 9) Queue : com.apple.network.connections (serial)
#0	0x000000010ef98ba7 in _dispatch_async_f_slow ()
#1	0x000000010e0670bf in wrap_dispatch_async ()
#2	0x00007ff820261fd1 in nw_queue_context_async ()
#3	0x00007ff820228e14 in nw_endpoint_resolver_update ()
#4	0x00007ff8207257be in __52-[NWConcrete_nw_endpoint_resolver startWithHandler:]_block_invoke.3 ()
#5	0x00007ff8202271b0 in __nw_resolver_update_client_block_invoke ()
#6	0x000000010e0670dc in __tsan::invoke_and_release_block(void*) ()
#7	0x000000010e066e32 in __tsan::dispatch_callback_wrap(void*) ()
#8	0x000000010ef94874 in _dispatch_client_callout ()
#9	0x000000010ef9e9be in _dispatch_workloop_invoke ()
#10	0x000000010efaad1d in _dispatch_workloop_worker_thread ()
#11	0x000000010f03b7e7 in _pthread_wqthread ()
#12	0x000000010f041ceb in start_wqthread ()
Enqueued from com.apple.network.connections (Thread 9) Queue : com.apple.network.connections (serial)
#0	0x000000010ef98ba7 in _dispatch_async_f_slow ()
#1	0x000000010e0670bf in wrap_dispatch_async ()
#2	0x00007ff820261fd1 in nw_queue_context_async ()
#3	0x00007ff820223f8a in nw_resolver_update_client ()
#4	0x00007ff820223349 in nw_resolver_update_status_locked ()
#5	0x00007ff820470ba8 in __nw_resolver_create_dns_getaddrinfo_locked_block_invoke.165 ()
#6	0x00007ff822809c04 in ___dnssd_getaddrinfo_activate_block_invoke ()
#7	0x000000010e066e32 in __tsan::dispatch_callback_wrap(void*) ()
#8	0x000000010ef94874 in _dispatch_client_callout ()
#9	0x000000010ef97792 in _dispatch_continuation_pop ()
#10	0x000000010efaef96 in _dispatch_source_invoke ()
#11	0x000000010ef9e7d1 in _dispatch_workloop_invoke ()
#12	0x000000010efaad1d in _dispatch_workloop_worker_thread ()
#13	0x000000010f03b7e7 in _pthread_wqthread ()
#14	0x000000010f041ceb in start_wqthread ()

[morganchen12]

There's a couple strange things about this crash.

1. The symbols are mostly libdispatch symbols and there aren't any Firebase symbols in the stack. Firebase could still be causing this crash, but we'll need a reproducible test case to figure out how that's happening.
2. The BUG IN LIBDISPATCH and EXC_BAD_INSTRUCTION are unusual as well. If it really is a bug in libdispatch, the crash may not be reproducible in other versions of macOS. Can you test this?

[paulb777]

This might be related to #9061.

I don't yet have Xcode 13.2.1, but Xcode 13.2b2 gives me the #9061 crash for iOS simulator targets with the thread sanitizer. It runs correctly for Catalyst. I tested with https://github.com/firebase/quickstart-ios/tree/master/analytics

[paulb777]

The Analytics Quickstart runs fine for me with Catalyst on macOS 12.0.1 with Xcode 13.2.1. I suspect the issue may be specific to the app and we'll likely need a reproducible test case to help.

[google-oss-bot]

Hey @girishw. We need more information to resolve this issue but there hasn't been an update in 5 weekdays. I'm marking the issue as stale and if there are no new updates in the next 5 days I will close it automatically.

If you have more information that will help us get to the bottom of this, just add a comment!

[google-oss-bot]

Since there haven't been any recent updates here, I am going to close this issue.

@girishw if you're still experiencing this problem and want to continue the discussion just leave a comment here and we are happy to re-open this.