[bug #6226] Segmentation fault when application finishes

[nobody]

=================== BUG #6226: FULL BUG SNAPSHOT ===================
http://savannah.gnu.org/bugs/?func=detailbug&bug_id=6226&group_id=99

Submitted by: benhur                  Project: GNUstep                      
Submitted on: Tue 10/28/2003 at 21:45
Category:  Gui/AppKit                 Severity:  2                          
Bug Group:  Bug                       Resolution:  None                     
Assigned to:  None                    Status:  Open                         

Summary:  Segmentation fault when application finishes

Original Submission:  Some applications generate a segmentation fault when 
finishing.

It goes like this:



NSApplication -dealloc releases the GSDisplayServer associated

to _app_icon_window. It gets deallocated.



NSResponder (NSApplication's super) -dealloc releases _menu



menu releases it's window.



NSWindow's dealloc calls GSServerForWindow(self) and obtains a pointer to the 
deallocated server.

NSWindow sends removeDragTypes:fromWindow to this deallocated object... boom!



The problem is that there is a NSMapTable to map windows to 

DisplayServers, and this map doesn't get updated when a displayserver is 
deallocated.



Adding the following method to GSDisplayServer and calling it from -dealloc 
solves the problem.



Benhur





- (void) _removeFromWindowMap

{

  NSMapEnumerator enumerator;

  void *key;

  void *val;



  enumerator = NSEnumerateMapTable(windowmaps);

  while (NSNextMapEnumeratorPair(&enumerator, &key, &val))

    {

      if (val == self)

        {

          NSMapRemove(windowmaps, key);

        }

    }

  NSEndMapTableEnumeration(&enumerator);

}







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