6a8fd4c76a claims that RescheduleDuringAcquire is
necessary to prevent deadlocks, but fails to explain what those deadlocks look
like (and the cited HH internal issue 163542 is not available for inspection).
It does lead to code erroneously being called with unlocked solar mutex, leading
to crashes like
Thread 1:
0 in com::sun:⭐:uno::BaseReference::is at solver/unxlngx6/inc/com/sun/star/uno/Reference.h:103
1 in sdr::contact::ControlHolder::is at svx/source/sdr/contact/viewobjectcontactofunocontrol.cxx:204
2 in sdr::contact::ViewObjectContactOfUnoControl_Impl::hasControl at svx/source/sdr/contact/viewobjectcontactofunocontrol.cxx:642
3 in sdr::contact::ViewObjectContactOfUnoControl::isPrimitiveVisible at svx/source/sdr/contact/viewobjectcontactofunocontrol.cxx:1815
4 in sdr::contact::ViewObjectContact::getPrimitive2DSequenceHierarchy at svx/source/sdr/contact/viewobjectcontact.cxx:396
5 in sdr::contact::ViewObjectContact::getPrimitive2DSequenceSubHierarchy at svx/source/sdr/contact/viewobjectcontact.cxx:428
6 in sdr::contact::ViewObjectContactOfPageHierarchy::getPrimitive2DSequenceHierarchy at svx/source/sdr/contact/viewobjectcontactofsdrpage.cxx:450
7 in sdr::contact::ViewObjectContact::getPrimitive2DSequenceSubHierarchy at svx/source/sdr/contact/viewobjectcontact.cxx:428
8 in sdr::contact::ViewObjectContactOfSdrPage::getPrimitive2DSequenceHierarchy at svx/source/sdr/contact/viewobjectcontactofsdrpage.cxx:699
9 in sdr::contact::ObjectContactOfPageView::DoProcessDisplay at svx/source/sdr/contact/objectcontactofpageview.cxx:248
10 in sdr::contact::ObjectContactOfPageView::ProcessDisplay at svx/source/sdr/contact/objectcontactofpageview.cxx:132
11 in SdrPageWindow::RedrawLayer at svx/source/svdraw/sdrpagewindow.cxx:391
12 in SdrPageView::DrawLayer at svx/source/svdraw/svdpagv.cxx:398
13 in SwViewImp::PaintLayer at sw/source/core/view/vdraw.cxx:148
14 in SwRootFrm::Paint at sw/source/core/layout/paintfrm.cxx:2976
15 in ViewShell::Paint at sw/source/core/view/viewsh.cxx:1678
16 in SwCrsrShell::Paint at sw/source/core/crsr/crsrsh.cxx:1165
17 in SwEditWin::Paint at sw/source/ui/docvw/edtwin2.cxx:535
18 in Window::ImplCallPaint at vcl/source/window/window.cxx:2417
19 in Window::ImplCallPaint at vcl/source/window/window.cxx:2441
20 in Window::ImplCallPaint at vcl/source/window/window.cxx:2441
21 in Window::ImplCallPaint at vcl/source/window/window.cxx:2441
22 in Window::ImplCallPaint at vcl/source/window/window.cxx:2441
23 in Window::ImplCallPaint at vcl/source/window/window.cxx:2441
24 in Window::ImplCallPaint at vcl/source/window/window.cxx:2441
25 in Window::ImplCallOverlapPaint at vcl/source/window/window.cxx:2477
26 in Window::ImplHandlePaintHdl at vcl/source/window/window.cxx:2497
27 in Window::LinkStubImplHandlePaintHdl at vcl/source/window/window.cxx:2491
28 in Link::Call at solver/unxlngx6/inc/tools/link.hxx:140
29 in Timer::Timeout at vcl/source/app/timer.cxx:256
30 in Timer::ImplTimerCallbackProc at vcl/source/app/timer.cxx:144
31 in SalTimer::CallCallback at vcl/inc/saltimer.hxx:66
32 in SvpSalInstance::CheckTimeout at vcl/headless/svpinst.cxx:199
33 in SvpSalInstance::Yield at vcl/headless/svpinst.cxx:310
34 in ImplYield at vcl/source/app/svapp.cxx:455
35 in Application::Reschedule at vcl/source/app/svapp.cxx:482
36 in SolarMutexReleaser::~SolarMutexReleaser at solver/unxlngx6/inc/vcl/svapp.hxx:551
37 in VCLXWindowImpl::OnProcessCallbacks at toolkit/source/awt/vclxwindow.cxx:320
38 in VCLXWindowImpl::LinkStubOnProcessCallbacks at toolkit/source/awt/vclxwindow.cxx:291
39 in Link::Call at solver/unxlngx6/inc/tools/link.hxx:140
40 in ImplHandleUserEvent at vcl/source/window/winproc.cxx:1999
41 in ImplWindowFrameProc at vcl/source/window/winproc.cxx:2571
42 in SalFrame::CallCallback at vcl/inc/salframe.hxx:294
43 in SvpSalInstance::Yield at vcl/headless/svpinst.cxx:299
44 in ImplYield at vcl/source/app/svapp.cxx:455
45 in Application::Yield at vcl/source/app/svapp.cxx:489
46 in Application::Execute at vcl/source/app/svapp.cxx:432
47 in desktop::Desktop::Main at desktop/source/app/app.cxx:1824
48 in ImplSVMain at vcl/source/app/svmain.cxx:178
49 in SVMain at vcl/source/app/svmain.cxx:215
50 in soffice_main at desktop/source/app/sofficemain.cxx:67
51 in sal_main at desktop/source/app/main.c:34
52 in main at desktop/source/app/main.c:33
Thread 2:
0 __lll_unlock_wake at ../nptl/sysdeps/unix/sysv/linux/x86_64/lowlevellock.S:373
1 in _L_unlock_657 from /lib64/libpthread-2.12.so
2 in __pthread_mutex_unlock_usercnt at pthread_mutex_unlock.c:52
3 __pthread_mutex_unlock at pthread_mutex_unlock.c:290
4 in osl_releaseMutex at sal/osl/unx/mutex.c:179
5 in vcl::SolarMutexObject::release at vcl/source/app/solarmutex.cxx:54
6 in SalYieldMutex::release at vcl/generic/app/geninst.cxx:73
7 in SolarMutexGuard::~SolarMutexGuard at solver/unxlngx6/inc/vcl/svapp.hxx:436
8 in SfxBaseModel::close at sfx2/source/doc/sfxbasemodel.cxx:1500
9 in SwXTextDocument::close at sw/source/ui/uno/unotxdoc.cxx:574
10 in callVirtualMethod at bridges/source/cpp_uno/gcc3_linux_x86-64/uno2cpp.cxx:155
11 in cpp_call at bridges/source/cpp_uno/gcc3_linux_x86-64/uno2cpp.cxx:392
12 in bridges::cpp_uno::shared::unoInterfaceProxyDispatch at bridges/source/cpp_uno/gcc3_linux_x86-64/uno2cpp.cxx:586
13 in binaryurp::IncomingRequest::execute_throw at binaryurp/source/incomingrequest.cxx:263
14 in binaryurp::IncomingRequest::execute at binaryurp/source/incomingrequest.cxx:89
15 in binaryurp::(anonymous namespace)::request at binaryurp/source/reader.cxx:107
16 in cppu_threadpool::JobQueue::enter at cppu/source/threadpool/jobqueue.cxx:121
17 in cppu_threadpool::ORequestThread::run at cppu/source/threadpool/thread.cxx:222
18 in cppu_requestThreadWorker at cppu/source/threadpool/thread.cxx:57
19 in osl_thread_start_Impl at sal/osl/unx/thread.c:292
20 in start_thread at pthread_create.c:301
21 in clone at ../sysdeps/unix/sysv/linux/x86_64/clone.S:115
Looks best to remove that strange feature again and, if deadlocks should
resurface, how to fix them cleanly.
