Operate on VCL Menu with SolarMutex locked

...as such VCL code presumably expects to only be called when SolarMutex is
locked, but which is not necessarily the case here for the ~VCLXMenu UNO object
destructor.  (I ran into this with a tentative commit for tdf#147668 "Writer
crashes shortly after loading document with LanguageTool extension active",
which would have added DBG_TESTSOLARMUTEX() to some GtkSalMenu code indirectly
called from within mpMenu.disposeAndClear() here, and where this VCLXMenu object
was held by Java extension code, so the destructor call happened on some JVM
asynchronous finalizer thread, outside any SolarMutex lock.)

Change-Id: Ia2c3ebec837275cfdf1548f22cfa33f0752e8ef4
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/132125
Tested-by: Jenkins
Reviewed-by: Stephan Bergmann <sbergman@redhat.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/toolkit/source/awt/vclxmenu.cxx b/toolkit/source/awt/vclxmenu.cxx
index cbeb1ef7f810..3eda26c81236 100644
--- a/toolkit/source/awt/vclxmenu.cxx
+++ b/toolkit/source/awt/vclxmenu.cxx
@@ -57,6 +57,7 @@ VCLXMenu::~VCLXMenu()
     maPopupMenuRefs.clear();
     if ( mpMenu )
     {
+        SolarMutexGuard g;
         mpMenu->RemoveEventListener( LINK( this, VCLXMenu, MenuEventListener ) );
         mpMenu.disposeAndClear();
     }