Deadlock in CFContentStream

[rolfbjarne]

Crash report:

crash-report.txt

Execution log: execute-MacCatalyst-20260603_055316.txt

Important parts:

(lldb) thread backtrace all
* thread #1, queue = 'com.apple.main-thread', stop reason = signal SIGSTOP
  * frame #0: 0x000000019412e4f8 libsystem_kernel.dylib`__psynch_cvwait + 8
    frame #1: 0x000000019416e108 libsystem_pthread.dylib`_pthread_cond_wait + 1028
    frame #2: 0x0000000104fad934 monotouchtest`_S_P_CoreLib_System_Threading_WaitSubsystem_ThreadWaitInfo__Wait(this=0x0000000116e55a78, timeoutMilliseconds=<unavailable>, interruptible=<unavailable>, isSleep=<unavailable>, lockHolder=<unavailable>) at WaitSubsystem.ThreadWaitInfo.Unix.cs:322
    frame #3: 0x0000000104fae404 monotouchtest`_S_P_CoreLib_System_Threading_WaitSubsystem_WaitableObject__Wait(this=<unavailable>, waitInfo=<unavailable>, timeoutMilliseconds=<unavailable>, interruptible=<unavailable>, prioritize=<unavailable>) at WaitSubsystem.WaitableObject.Unix.cs:320
    frame #4: 0x0000000104ef2d08 monotouchtest`_S_P_CoreLib_System_Threading_WaitHandle__WaitOneNoCheck(this=<unavailable>, millisecondsTimeout=<unavailable>, useTrivialWaits=<unavailable>, associatedObject=<unavailable>, waitSource=<unavailable>) at WaitHandle.cs:144
    frame #5: 0x0000000104c6cd6c monotouchtest`_Microsoft_MacCatalyst_System_Net_Http_CFContentStream__ReadStreamData(this=0x00000000ffffffff) at CFContentStream.cs:103
    frame #6: 0x0000000104c6dc58 monotouchtest`_Microsoft_MacCatalyst_System_Net_Http_CFNetworkHandler__HandleHasBytesAvailableEvent(this=<unavailable>, sender=<unavailable>, e=<unavailable>) at CFNetworkHandler.cs:355
    frame #7: 0x0000000104c6d828 monotouchtest`_Microsoft_MacCatalyst_System_Net_Http_CFNetworkHandler__HandleClosedEvent(this=0x0000000117feeb28, sender=<unavailable>, e=<unavailable>) at CFNetworkHandler.cs:328
    frame #8: 0x0000000104bd3ee8 monotouchtest`_Microsoft_MacCatalyst_CoreFoundation_CFStream__NativeCallback(s=<unavailable>, type=<unavailable>, info=<unavailable>) at CFStream.cs:701
    [...]
  thread #12, name = '.NET TP Worker'
    frame #0: 0x000000019412e4f8 libsystem_kernel.dylib`__psynch_cvwait + 8
    frame #1: 0x000000019416e108 libsystem_pthread.dylib`_pthread_cond_wait + 1028
    frame #2: 0x0000000104fad934 monotouchtest`_S_P_CoreLib_System_Threading_WaitSubsystem_ThreadWaitInfo__Wait(this=0x000000011824d398, timeoutMilliseconds=<unavailable>, interruptible=<unavailable>, isSleep=<unavailable>, lockHolder=<unavailable>) at WaitSubsystem.ThreadWaitInfo.Unix.cs:322
    frame #3: 0x0000000104fae404 monotouchtest`_S_P_CoreLib_System_Threading_WaitSubsystem_WaitableObject__Wait(this=<unavailable>, waitInfo=<unavailable>, timeoutMilliseconds=<unavailable>, interruptible=<unavailable>, prioritize=<unavailable>) at WaitSubsystem.WaitableObject.Unix.cs:320
    frame #4: 0x0000000104ef2d08 monotouchtest`_S_P_CoreLib_System_Threading_WaitHandle__WaitOneNoCheck(this=<unavailable>, millisecondsTimeout=<unavailable>, useTrivialWaits=<unavailable>, associatedObject=<unavailable>, waitSource=<unavailable>) at WaitHandle.cs:144
    frame #5: 0x0000000104c6ce10 monotouchtest`_Microsoft_MacCatalyst_System_Net_Http_CFContentStream__Close(this=0x00000000ffffffff) at CFContentStream.cs:115
    frame #6: 0x0000000104c6d8b0 monotouchtest`_Microsoft_MacCatalyst_System_Net_Http_CFNetworkHandler__CloseStream(this=0x0000000117feeb28) at CFNetworkHandler.cs:337
    frame #7: 0x0000000104c6e3a4 monotouchtest`_Microsoft_MacCatalyst_System_Net_Http_CFNetworkHandler___c__DisplayClass20_0___SendAsync_b__0(this=<unavailable>) at CFNetworkHandler.cs:273
    frame #8: 0x0000000104ee7810 monotouchtest`_S_P_CoreLib_System_Threading_ExecutionContext__RunInternal(executionContext=<unavailable>, callback=<unavailable>, state=<unavailable>) at ExecutionContext.cs:179
    frame #9: 0x0000000104ee6be0 monotouchtest`_S_P_CoreLib_System_Threading_CancellationTokenSource__ExecuteCallbackHandlers(this=0x0000000117feeeb0, throwOnFirstException=false) at CancellationTokenSource.cs:814
    [...]

This caused a deadlock in monotouch-test when testing CFNetworkHandler.

CFNetworkHandler isn't supported, so instead of fixing the problem in CFNetworkHandler, I suggest we just disable any corresponding tests.