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Fix mono random crash by using correct hash table implementation #17

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merged 26 commits into from Jan 7, 2012

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joncham commented Jan 6, 2012

When building mono with eglib, one needs to use mono-ehash.c instead of mono-hash.c. This is handled in the Makefiles, but since we build on Windows using a vcproj we missed this. This should fix the random mono crash.

joncham and others added some commits Dec 20, 2011

Owner

Tak commented Jan 7, 2012

Someone else will have to look at my changes, but the ehash and test-related commits look good to me.

Owner

natosha commented Jan 7, 2012

Test and buildsystem related fixes all look good. Levi just walked me through the reasoning behind the thread local storage change, and it seems reasonable.

I'll merge this.

natosha added a commit that referenced this pull request Jan 7, 2012

Merge pull request #17 from Unity-Technologies/mono-bisect
Fix mono random crash by using correct hash table implementation

@natosha natosha merged commit e4efbf9 into unity-trunk Jan 7, 2012

joshpeterson pushed a commit that referenced this pull request Feb 24, 2017

[threads] Fix async call in coop (#4423)
We would observe crashes like the following:

```
 * Assertion at mono-threads.c:1009, condition `mono_thread_info_run_state (info) == STATE_ASYNC_SUSPENDED' not met

 Debug info from gdb:

 [New LWP 26793]
 [New LWP 26792]
 [Thread debugging using libthread_db enabled]
 Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
 0x00002b0ff3481ee9 in waitpid () from /lib/x86_64-linux-gnu/libpthread.so.0
   Id   Target Id         Frame
   3    Thread 0x2b0ff3e6c700 (LWP 26792) "SGen worker" 0x00002b0ff347e414 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/x86_64-linux-gnu/libpthread.so.0
   2    Thread 0x2b0ff633e700 (LWP 26793) "Finalizer" 0x00002b0ff347e414 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/x86_64-linux-gnu/libpthread.so.0
 * 1    Thread 0x2b0ff2b67c40 (LWP 26780) "mono" 0x00002b0ff3481ee9 in waitpid () from /lib/x86_64-linux-gnu/libpthread.so.0

 Thread 3 (Thread 0x2b0ff3e6c700 (LWP 26792)):
 #0  0x00002b0ff347e414 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/x86_64-linux-gnu/libpthread.so.0
 #1  0x0000000000661bdf in mono_os_cond_wait (mutex=0x9dee40 <lock>, cond=0x9dee00 <work_cond>) at ../../mono/utils/mono-os-mutex.h:146
 #2  thread_func (thread_data=0x2b0ff2bcb008) at sgen-thread-pool.c:129
 #3  0x00002b0ff347a182 in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
 #4  0x00002b0ff39a130d in clone () from /lib/x86_64-linux-gnu/libc.so.6

 Thread 2 (Thread 0x2b0ff633e700 (LWP 26793)):
 #0  0x00002b0ff347e414 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/x86_64-linux-gnu/libpthread.so.0
 #1  0x00000000005caff3 in mono_os_cond_wait (mutex=<optimized out>, cond=<optimized out>) at ../../mono/utils/mono-os-mutex.h:146
 #2  mono_coop_cond_wait (mutex=<optimized out>, cond=<optimized out>) at ../../mono/utils/mono-coop-mutex.h:87
 #3  mono_threadpool_io_remove_socket (fd=134239440) at threadpool-io.c:628
 #4  0x00000000005ae4f4 in ves_icall_System_Net_Sockets_Socket_Close_internal (sock=42, werror=<optimized out>) at w32socket.c:708
 #5  0x0000000041e8101f in ?? ()
 #6  0x00002b1014abe070 in ?? ()
 #7  0x0000000001615860 in ?? ()
 #8  0x0000000001615860 in ?? ()
 #9  0x0000000000000000 in ?? ()

 Thread 1 (Thread 0x2b0ff2b67c40 (LWP 26780)):
 #0  0x00002b0ff3481ee9 in waitpid () from /lib/x86_64-linux-gnu/libpthread.so.0
 #1  0x00000000004ac5e6 in mono_handle_native_crash (signal=<optimized out>, ctx=<optimized out>, info=<optimized out>) at mini-exceptions.c:2557
 #2  <signal handler called>
 #3  0x00002b0ff38dcf79 in raise () from /lib/x86_64-linux-gnu/libc.so.6
 #4  0x00002b0ff38e0388 in abort () from /lib/x86_64-linux-gnu/libc.so.6
 #5  0x000000000066b459 in mono_log_write_logfile (log_domain=<optimized out>, level=<optimized out>, hdr=<optimized out>, message=<optimized out>) at mono-log-common.c:137
 #6  0x00000000006805e0 in monoeg_g_logv (log_domain=log_domain@entry=0x0, log_level=log_level@entry=G_LOG_LEVEL_ERROR, format=<optimized out>, args=args@entry=0x7ffc7324ea78) at goutput.c:115
 #7  0x0000000000680736 in monoeg_assertion_message (format=<optimized out>) at goutput.c:135
 #8  0x00000000006759b8 in mono_thread_info_setup_async_call (info=info@entry=0x2b0ff80008c0, target_func=target_func@entry=0x5bac20 <suspend_for_shutdown_async_call>, user_data=user_data@entry=0x0) at mono-threads.c:1009
 #9  0x00000000005bad50 in suspend_for_shutdown_critical (info=info@entry=0x2b0ff80008c0, unused=unused@entry=0x0) at threads.c:5019
 #10 0x00000000006763ae in mono_thread_info_safe_suspend_and_run (id=47347555100416, interrupt_kernel=interrupt_kernel@entry=0, callback=callback@entry=0x5bad40 <suspend_for_shutdown_critical>, user_data=user_data@entry=0x0) at mono-threads.c:979
 #11 0x00000000005c2e71 in mono_thread_internal_suspend_for_shutdown (thread=<optimized out>) at threads.c:5028
 #12 0x00000000005e9100 in mono_gc_cleanup () at gc.c:1015
 #13 0x00000000005e108e in mono_runtime_cleanup (domain=domain@entry=0x1615860) at appdomain.c:423
 #14 0x00000000004228cb in mini_cleanup (domain=0x1615860) at mini-runtime.c:4111
 #15 0x000000000047b99f in mono_main (argc=10, argv=<optimized out>) at driver.c:2167
 #16 0x00000000004200db in mono_main_with_options (argv=0x7ffc7324ef68, argc=10) at main.c:45
 #17 main (argc=10, argv=0x7ffc7324ef68) at main.c:338

 =================================================================
 Got a SIGABRT while executing native code. This usually indicates
 a fatal error in the mono runtime or one of the native libraries
 used by your application.
 =================================================================
```

joshpeterson pushed a commit that referenced this pull request Mar 28, 2017

[lldb] update `monobt` so it understands interpreter frames.
```
(lldb) monobt
* thread #1
  * frame #0: 0x00000001001b236e mono-sgen`interp_transform_call(td=0x00007fff5fbfd080, method=0x0000000100915a90, target_method=0x0000000000000000, domain=0x000000010090b741
    frame #1: 0x00000001001a1c2e mono-sgen`generate(method=0x0000000100915a90, rtm=0x000000010382ac70, is_bb_start="\x01", generic_context=0x0000000100915ad0) + 9454 at tran8
    transforming TestMonoAsyncGenerics::AsyncWithAwait || frame #2: 0x000000010019f553 mono-sgen`mono_interp_transform_method(runtime_method=0x000000010382ac70, context=0x004
    TestMonoAsyncGenerics::AsyncWithAwait @ 0  || frame #3: 0x000000010018a178 mono-sgen`ves_exec_method_with_context(frame=0x00007fff5fbfe290, context=0x00007fff5fbfe3a8) +9
    TestMonoAsyncGenerics::Main @ 12 "pop" || frame #4: 0x000000010018b4b1 mono-sgen`ves_exec_method_with_context(frame=0x00007fff5fbfe420, context=0x00007fff5fbfe3a8) + 5081
    frame #5: 0x0000000100189e43 mono-sgen`mono_interp_runtime_invoke(method=0x000000010090ce38, obj=0x0000000000000000, params=0x00007fff5fbfea40, exc=0x0000000000000000, e0
    frame #6: 0x00000001000164a2 mono-sgen`mono_jit_runtime_invoke(method=0x000000010090ce38, obj=0x0000000000000000, params=0x00007fff5fbfea40, exc=0x0000000000000000, erro1
    frame #7: 0x000000010038b2b5 mono-sgen`do_runtime_invoke(method=0x000000010090ce38, obj=0x0000000000000000, params=0x00007fff5fbfea40, exc=0x0000000000000000, error=0x002
    frame #8: 0x0000000100384e97 mono-sgen`mono_runtime_invoke_checked(method=0x000000010090ce38, obj=0x0000000000000000, params=0x00007fff5fbfea40, error=0x00007fff5fbfeb000
    frame #9: 0x000000010038f335 mono-sgen`do_exec_main_checked(method=0x000000010090ce38, args=0x00000001020003c8, error=0x00007fff5fbfeb00) + 197 at object.c:4672
    frame #10: 0x000000010038dd5c mono-sgen`mono_runtime_exec_main_checked(method=0x000000010090ce38, args=0x00000001020003c8, error=0x00007fff5fbfeb00) + 76 at object.c:4773
    frame #11: 0x000000010038ddbf mono-sgen`mono_runtime_run_main_checked(method=0x000000010090ce38, argc=1, argv=0x00007fff5fbfef68, error=0x00007fff5fbfeb00) + 79 at objec2
    frame #12: 0x00000001000d9a33 mono-sgen`mono_jit_exec(domain=0x000000010090b740, assembly=0x0000000100913610, argc=1, argv=0x00007fff5fbfef68) + 403 at driver.c:1029
    frame #13: 0x00000001000dd9da mono-sgen`main_thread_handler(user_data=0x00007fff5fbfeea0) + 538 at driver.c:1098
    frame #14: 0x00000001000dc21c mono-sgen`mono_main(argc=3, argv=0x00007fff5fbfef58) + 8636 at driver.c:2163
    frame #15: 0x0000000100001b9e mono-sgen`mono_main_with_options(argc=3, argv=0x00007fff5fbfef58) + 46 at main.c:45
    frame #16: 0x00000001000012dd mono-sgen`main(argc=3, argv=0x00007fff5fbfef58) + 77 at main.c:338
    frame #17: 0x00007fffc2e66255 libdyld.dylib`start + 1
    frame #18: 0x00007fffc2e66255 libdyld.dylib`start + 1
```

joncham pushed a commit that referenced this pull request Apr 9, 2017

[threads] Fix async call in coop (#4423)
We would observe crashes like the following:

```
 * Assertion at mono-threads.c:1009, condition `mono_thread_info_run_state (info) == STATE_ASYNC_SUSPENDED' not met

 Debug info from gdb:

 [New LWP 26793]
 [New LWP 26792]
 [Thread debugging using libthread_db enabled]
 Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
 0x00002b0ff3481ee9 in waitpid () from /lib/x86_64-linux-gnu/libpthread.so.0
   Id   Target Id         Frame
   3    Thread 0x2b0ff3e6c700 (LWP 26792) "SGen worker" 0x00002b0ff347e414 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/x86_64-linux-gnu/libpthread.so.0
   2    Thread 0x2b0ff633e700 (LWP 26793) "Finalizer" 0x00002b0ff347e414 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/x86_64-linux-gnu/libpthread.so.0
 * 1    Thread 0x2b0ff2b67c40 (LWP 26780) "mono" 0x00002b0ff3481ee9 in waitpid () from /lib/x86_64-linux-gnu/libpthread.so.0

 Thread 3 (Thread 0x2b0ff3e6c700 (LWP 26792)):
 #0  0x00002b0ff347e414 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/x86_64-linux-gnu/libpthread.so.0
 #1  0x0000000000661bdf in mono_os_cond_wait (mutex=0x9dee40 <lock>, cond=0x9dee00 <work_cond>) at ../../mono/utils/mono-os-mutex.h:146
 #2  thread_func (thread_data=0x2b0ff2bcb008) at sgen-thread-pool.c:129
 #3  0x00002b0ff347a182 in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
 #4  0x00002b0ff39a130d in clone () from /lib/x86_64-linux-gnu/libc.so.6

 Thread 2 (Thread 0x2b0ff633e700 (LWP 26793)):
 #0  0x00002b0ff347e414 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/x86_64-linux-gnu/libpthread.so.0
 #1  0x00000000005caff3 in mono_os_cond_wait (mutex=<optimized out>, cond=<optimized out>) at ../../mono/utils/mono-os-mutex.h:146
 #2  mono_coop_cond_wait (mutex=<optimized out>, cond=<optimized out>) at ../../mono/utils/mono-coop-mutex.h:87
 #3  mono_threadpool_io_remove_socket (fd=134239440) at threadpool-io.c:628
 #4  0x00000000005ae4f4 in ves_icall_System_Net_Sockets_Socket_Close_internal (sock=42, werror=<optimized out>) at w32socket.c:708
 #5  0x0000000041e8101f in ?? ()
 #6  0x00002b1014abe070 in ?? ()
 #7  0x0000000001615860 in ?? ()
 #8  0x0000000001615860 in ?? ()
 #9  0x0000000000000000 in ?? ()

 Thread 1 (Thread 0x2b0ff2b67c40 (LWP 26780)):
 #0  0x00002b0ff3481ee9 in waitpid () from /lib/x86_64-linux-gnu/libpthread.so.0
 #1  0x00000000004ac5e6 in mono_handle_native_crash (signal=<optimized out>, ctx=<optimized out>, info=<optimized out>) at mini-exceptions.c:2557
 #2  <signal handler called>
 #3  0x00002b0ff38dcf79 in raise () from /lib/x86_64-linux-gnu/libc.so.6
 #4  0x00002b0ff38e0388 in abort () from /lib/x86_64-linux-gnu/libc.so.6
 #5  0x000000000066b459 in mono_log_write_logfile (log_domain=<optimized out>, level=<optimized out>, hdr=<optimized out>, message=<optimized out>) at mono-log-common.c:137
 #6  0x00000000006805e0 in monoeg_g_logv (log_domain=log_domain@entry=0x0, log_level=log_level@entry=G_LOG_LEVEL_ERROR, format=<optimized out>, args=args@entry=0x7ffc7324ea78) at goutput.c:115
 #7  0x0000000000680736 in monoeg_assertion_message (format=<optimized out>) at goutput.c:135
 #8  0x00000000006759b8 in mono_thread_info_setup_async_call (info=info@entry=0x2b0ff80008c0, target_func=target_func@entry=0x5bac20 <suspend_for_shutdown_async_call>, user_data=user_data@entry=0x0) at mono-threads.c:1009
 #9  0x00000000005bad50 in suspend_for_shutdown_critical (info=info@entry=0x2b0ff80008c0, unused=unused@entry=0x0) at threads.c:5019
 #10 0x00000000006763ae in mono_thread_info_safe_suspend_and_run (id=47347555100416, interrupt_kernel=interrupt_kernel@entry=0, callback=callback@entry=0x5bad40 <suspend_for_shutdown_critical>, user_data=user_data@entry=0x0) at mono-threads.c:979
 #11 0x00000000005c2e71 in mono_thread_internal_suspend_for_shutdown (thread=<optimized out>) at threads.c:5028
 #12 0x00000000005e9100 in mono_gc_cleanup () at gc.c:1015
 #13 0x00000000005e108e in mono_runtime_cleanup (domain=domain@entry=0x1615860) at appdomain.c:423
 #14 0x00000000004228cb in mini_cleanup (domain=0x1615860) at mini-runtime.c:4111
 #15 0x000000000047b99f in mono_main (argc=10, argv=<optimized out>) at driver.c:2167
 #16 0x00000000004200db in mono_main_with_options (argv=0x7ffc7324ef68, argc=10) at main.c:45
 #17 main (argc=10, argv=0x7ffc7324ef68) at main.c:338

 =================================================================
 Got a SIGABRT while executing native code. This usually indicates
 a fatal error in the mono runtime or one of the native libraries
 used by your application.
 =================================================================
```

joncham pushed a commit that referenced this pull request Jun 9, 2017

Revert "[marshal] delay dummy string allocation"
Reverts 5e23a77

It seems to cause a crash during msbuild tests:

```
  xunit -> Microsoft.Build.Engine.UnitTests...
  Stacktrace:

  Native stacktrace:

  	0   mono                                0x0017cad4 mono_handle_native_crash + 308
  	1   mono                                0x001e2b03 sigabrt_signal_handler + 147
  	2   libsystem_platform.dylib            0x920a8deb _sigtramp + 43
  	3   ???                                 0xffffffff 0x0 + 4294967295
  	4   libsystem_c.dylib                   0x940bb27c abort + 155
  	5   mono                                0x0036886d mono_log_write_logfile + 381
  	6   mono                                0x003630d2 structured_log_adapter + 50
  	7   mono                                0x00380d1b monoeg_assertion_message + 107
  	8   mono                                0x0033863d major_scan_object_with_evacuation + 3373
  	9   mono                                0x0033b3d0 drain_gray_stack + 6608
  	10  mono                                0x0032df57 finish_gray_stack + 151
  	11  mono                                0x0032d3c6 major_finish_collection + 118
  	12  mono                                0x00329909 major_do_collection + 169
  	13  mono                                0x003288bd sgen_perform_collection + 605
  	14  mono                                0x0032a90b sgen_gc_collect + 75
  	15  mono                                0x002d5c4d unload_thread_main + 861
  	16  mono                                0x002abb6b start_wrapper + 795
  	17  libsystem_pthread.dylib             0x9ae6d5fb _pthread_body + 144
  	18  libsystem_pthread.dylib             0x9ae6d485 _pthread_struct_init + 0
  	19  libsystem_pthread.dylib             0x9ae72cf2 thread_start + 34

  Debug info from gdb:

  (lldb) command source -s 0 '/tmp/mono-gdb-commands.2tso9f'
  Executing commands in '/tmp/mono-gdb-commands.2tso9f'.
  (lldb) process attach --pid 2037
  2017-06-02 13:07:23.000 lldb[2093:282f] Metadata.framework [Error]: couldn't get the client port
  Process 2037 stopped
  * thread #1, name = 'tid_507', queue = 'com.apple.main-thread', stop reason = signal SIGSTOP
      frame #0: 0x923cc7ca libsystem_kernel.dylib`__psynch_cvwait + 10
  libsystem_kernel.dylib`__psynch_cvwait:
  ->  0x923cc7ca <+10>: jae    0x923cc7da                ; <+26>
      0x923cc7cc <+12>: calll  0x923cc7d1                ; <+17>
      0x923cc7d1 <+17>: popl   %edx
      0x923cc7d2 <+18>: movl   0xe0b084f(%edx), %edx

  Executable module set to "/Users/builder/data/lanes/2716/mono-mac-sdk/external/bockbuild/stage/bin/mono".
  Architecture set to: i386-apple-macosx.
  (lldb) thread list
  Process 2037 stopped
  * thread #1: tid = 0x530e96a, 0x923cc7ca libsystem_kernel.dylib`__psynch_cvwait + 10, name = 'tid_507', queue = 'com.apple.main-thread', stop reason = signal SIGSTOP
    thread #2: tid = 0x530e96b, 0x923cc7ca libsystem_kernel.dylib`__psynch_cvwait + 10, name = 'SGen worker'
    thread #3: tid = 0x530e96c, 0x923cc7ca libsystem_kernel.dylib`__psynch_cvwait + 10, name = 'SGen worker'
    thread #4: tid = 0x530e96d, 0x923c7fb6 libsystem_kernel.dylib`semaphore_wait_trap + 10, name = 'Finalizer'
    thread #5: tid = 0x530e96e, 0x923cd992 libsystem_kernel.dylib`kevent64 + 10, queue = 'com.apple.libdispatch-manager'
    thread #6: tid = 0x530ea26, 0x923ccace libsystem_kernel.dylib`__select + 10, name = 'tid_5a03'
    thread #7: tid = 0x530edf1, 0x923cc7ca libsystem_kernel.dylib`__psynch_cvwait + 10, name = 'tid_4007'
    thread #8: tid = 0x530edf2, 0x923cc7ca libsystem_kernel.dylib`__psynch_cvwait + 10, name = 'Threadpool worker'
    thread #9: tid = 0x530edf3, 0x923cc7ca libsystem_kernel.dylib`__psynch_cvwait + 10, name = 'Threadpool worker'
    thread #10: tid = 0x530edf4, 0x923ccff2 libsystem_kernel.dylib`__wait4 + 10, name = 'Domain unloader'
  (lldb) thread backtrace all
  * thread #1, name = 'tid_507', queue = 'com.apple.main-thread', stop reason = signal SIGSTOP
    * frame #0: 0x923cc7ca libsystem_kernel.dylib`__psynch_cvwait + 10
      frame #1: 0x9ae6fd1d libsystem_pthread.dylib`_pthread_cond_wait + 728
      frame #2: 0x9ae71bd9 libsystem_pthread.dylib`pthread_cond_wait$UNIX2003 + 71
      frame #3: 0x00361ea9 mono`mono_os_event_wait_multiple + 505
      frame #4: 0x00361ca5 mono`mono_os_event_wait_one + 53
      frame #5: 0x00376b49 mono`mono_thread_info_wait_one_handle + 41
      frame #6: 0x002d51b5 mono`mono_domain_try_unload + 485
      frame #7: 0x002d4f6a mono`ves_icall_System_AppDomain_InternalUnload + 90
      frame #8: 0x05bf9ee0
      frame #9: 0x018ce01d mscorlib.dll.dylib`System_AppDomain_Unload_System_AppDomain + 45
      frame #10: 0x05bf9d60
      frame #11: 0x05bf9ccc
      frame #12: 0x05bf9d04
      frame #13: 0x05bf9c90
      frame #14: 0x05bf996d
      frame #15: 0x02e7d171
      frame #16: 0x005c26d4
      frame #17: 0x005b6878
      frame #18: 0x005b6b7a
      frame #19: 0x000c38a8 mono`mono_jit_runtime_invoke + 1592
      frame #20: 0x002e43fe mono`do_runtime_invoke + 94
      frame #21: 0x002e7de3 mono`do_exec_main_checked + 147
      frame #22: 0x002e69a5 mono`mono_runtime_run_main_checked + 69
      frame #23: 0x0013b687 mono`mono_jit_exec + 311
      frame #24: 0x0013e2b2 mono`mono_main + 10114
      frame #25: 0x000b22db mono`main + 2011
      frame #26: 0x000b1af5 mono`start + 53
    thread #2, name = 'SGen worker'
      frame #0: 0x923cc7ca libsystem_kernel.dylib`__psynch_cvwait + 10
      frame #1: 0x9ae6fd1d libsystem_pthread.dylib`_pthread_cond_wait + 728
      frame #2: 0x9ae71bd9 libsystem_pthread.dylib`pthread_cond_wait$UNIX2003 + 71
      frame #3: 0x0035f0e9 mono`thread_func + 249
      frame #4: 0x9ae6d5fb libsystem_pthread.dylib`_pthread_body + 144
      frame #5: 0x9ae6d485 libsystem_pthread.dylib`_pthread_start + 130
      frame #6: 0x9ae72cf2 libsystem_pthread.dylib`thread_start + 34
    thread #3, name = 'SGen worker'
      frame #0: 0x923cc7ca libsystem_kernel.dylib`__psynch_cvwait + 10
      frame #1: 0x9ae6fd1d libsystem_pthread.dylib`_pthread_cond_wait + 728
      frame #2: 0x9ae71bd9 libsystem_pthread.dylib`pthread_cond_wait$UNIX2003 + 71
      frame #3: 0x0035f0e9 mono`thread_func + 249
      frame #4: 0x9ae6d5fb libsystem_pthread.dylib`_pthread_body + 144
      frame #5: 0x9ae6d485 libsystem_pthread.dylib`_pthread_start + 130
      frame #6: 0x9ae72cf2 libsystem_pthread.dylib`thread_start + 34
    thread #4, name = 'Finalizer'
      frame #0: 0x923c7fb6 libsystem_kernel.dylib`semaphore_wait_trap + 10
      frame #1: 0x002dbeb6 mono`finalizer_thread + 278
      frame #2: 0x002abb6b mono`start_wrapper + 795
      frame #3: 0x9ae6d5fb libsystem_pthread.dylib`_pthread_body + 144
      frame #4: 0x9ae6d485 libsystem_pthread.dylib`_pthread_start + 130
      frame #5: 0x9ae72cf2 libsystem_pthread.dylib`thread_start + 34
    thread #5, queue = 'com.apple.libdispatch-manager'
      frame #0: 0x923cd992 libsystem_kernel.dylib`kevent64 + 10
      frame #1: 0x91b5c899 libdispatch.dylib`_dispatch_mgr_invoke + 238
      frame #2: 0x91b5c532 libdispatch.dylib`_dispatch_mgr_thread + 52
    thread #6, name = 'tid_5a03'
      frame #0: 0x923ccace libsystem_kernel.dylib`__select + 10
      frame #1: 0x0036df29 mono`mono_poll + 409
      frame #2: 0x002b482f mono`poll_event_wait + 111
      frame #3: 0x002b345f mono`selector_thread + 1439
      frame #4: 0x002abb6b mono`start_wrapper + 795
      frame #5: 0x9ae6d5fb libsystem_pthread.dylib`_pthread_body + 144
      frame #6: 0x9ae6d485 libsystem_pthread.dylib`_pthread_start + 130
      frame #7: 0x9ae72cf2 libsystem_pthread.dylib`thread_start + 34
    thread #7, name = 'tid_4007'
      frame #0: 0x923cc7ca libsystem_kernel.dylib`__psynch_cvwait + 10
      frame #1: 0x9ae6fd1d libsystem_pthread.dylib`_pthread_cond_wait + 728
      frame #2: 0x9ae71c25 libsystem_pthread.dylib`pthread_cond_timedwait$UNIX2003 + 71
      frame #3: 0x003760f3 mono`mono_thread_info_sleep + 979
      frame #4: 0x002b1a86 mono`monitor_thread + 262
      frame #5: 0x002abb6b mono`start_wrapper + 795
      frame #6: 0x9ae6d5fb libsystem_pthread.dylib`_pthread_body + 144
      frame #7: 0x9ae6d485 libsystem_pthread.dylib`_pthread_start + 130
      frame #8: 0x9ae72cf2 libsystem_pthread.dylib`thread_start + 34
    thread #8, name = 'Threadpool worker'
      frame #0: 0x923cc7ca libsystem_kernel.dylib`__psynch_cvwait + 10
      frame #1: 0x9ae6fd1d libsystem_pthread.dylib`_pthread_cond_wait + 728
      frame #2: 0x9ae71c25 libsystem_pthread.dylib`pthread_cond_timedwait$UNIX2003 + 71
      frame #3: 0x002b12e0 mono`worker_thread + 1024
      frame #4: 0x002abb6b mono`start_wrapper + 795
      frame #5: 0x9ae6d5fb libsystem_pthread.dylib`_pthread_body + 144
      frame #6: 0x9ae6d485 libsystem_pthread.dylib`_pthread_start + 130
      frame #7: 0x9ae72cf2 libsystem_pthread.dylib`thread_start + 34
    thread #9, name = 'Threadpool worker'
      frame #0: 0x923cc7ca libsystem_kernel.dylib`__psynch_cvwait + 10
      frame #1: 0x9ae6fd1d libsystem_pthread.dylib`_pthread_cond_wait + 728
      frame #2: 0x9ae71c25 libsystem_pthread.dylib`pthread_cond_timedwait$UNIX2003 + 71
      frame #3: 0x002b12e0 mono`worker_thread + 1024
      frame #4: 0x002abb6b mono`start_wrapper + 795
      frame #5: 0x9ae6d5fb libsystem_pthread.dylib`_pthread_body + 144
      frame #6: 0x9ae6d485 libsystem_pthread.dylib`_pthread_start + 130
      frame #7: 0x9ae72cf2 libsystem_pthread.dylib`thread_start + 34
    thread #10, name = 'Domain unloader'
      frame #0: 0x923ccff2 libsystem_kernel.dylib`__wait4 + 10
      frame #1: 0x940d9ea5 libsystem_c.dylib`waitpid$UNIX2003 + 48
      frame #2: 0x0017cba7 mono`mono_handle_native_crash + 519
      frame #3: 0x001e2b03 mono`sigabrt_signal_handler + 147
      frame #4: 0x920a8deb libsystem_platform.dylib`_sigtramp + 43
  (lldb) detach
  Process 2037 detached
  (lldb) quit

  =================================================================
  Got a SIGABRT while executing native code. This usually indicates
  a fatal error in the mono runtime or one of the native libraries
  used by your application.
  =================================================================
```
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