[Libreoffice-bugs] [Bug 105062] Firebird: Trying to close Firebird-DB without saving leads to hang of LO

[bugzilla-daemon at bugs.documentfoundation.org]

https://bugs.documentfoundation.org/show_bug.cgi?id=105062

--- Comment #16 from Jan-Marek Glogowski <glogow at fbihome.de> ---
Created attachment 137017
  --> https://bugs.documentfoundation.org/attachment.cgi?id=137017&action=edit
MacOS bt of autorecovery mutex deadlock

Interesting that I couldn't reproduce this on Linux...

So on Mac we have another deadlock on in the DB code:

Two threads wait for mutexes:

* thread #1: tid = 0x18e674, 0x00007fffb17b3c22
libsystem_kernel.dylib`__psynch_mutexwait + 10, queue =
'com.apple.main-thread', stop reason = signal SIGSTOP
  thread #5: tid = 0x18e6e7, 0x00007fffb17b3c22
libsystem_kernel.dylib`__psynch_mutexwait + 10, name = 'DocumentEventNotifier'

Thread 5 wants the SolarMutex:
   frame #5: 0x000000010bd41a69
libvcllo.dylib`SalYieldMutex::doAcquire(this=0x00007fad65c4be00, nLockCount=1)
+ 441 at salinst.cxx:302

(lldb) f 5
....
(lldb) p *this
(SalYieldMutex) $5 = {
  comphelper::GenericSolarMutex = {
    m_nThreadId = 1631860

$ echo "obase=16; 1631860"|bc
18E674
Which happens to be thread 1.

I can't really verify the mutexes held by thread 5, but my guess it's the one
thread 1 is waiting for.

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