Program exits with signal 11 (SIGSEGV).

[Matthew Jew]

Ruslan,

On Monday, July 21, 2003, at 03:31  PM, Ruslan Zasukhin wrote:

> on 7/22/03 1:25, Matthew Jew at mjew at icnc.com wrote:
>
> Hi Mathew,
>
>> Ruslan,
>>
>> Signal 11 (SIGSEGV) is a segment violation (or so the pages I read 
>> say).
>>
>> SIGSEGV can have two reasons I think
>>
>> SEGV_MAPERR address not mapped to object
>> SEGV_ACCERR invalid permissions for mapped object
>>
>> I got the debugger working (using Totte's suggestion about copying the
>> framework)
>> and the SIGSEGV actually occurs within the method at this point
>>
>>  delete _databaseDefinition;
>>
>> The full method is
>> - (void)dealloc
>> {
>>    [self close];
>>    delete _databaseDefinition; // <-- SIGSEGV occurs here
>>
>>    [super dealloc];
>> }
>
> What is  _databaseDefinition
> -- is it your class ?
>
>

It is from the Cocoa Demo (I just copied over the demo files)
and modified them for my fields.
// ----------------------------------------------------------
// DatabaseDefinition class
// ----------------------------------------------------------

class DatabaseDefinition : public VDK_DataBase
{
     private:
         NewsgroupTable *_newsgroupTable;

     public:
         DatabaseDefinition() {
             _newsgroupTable = new NewsgroupTable();
         }
         ~DatabaseDefinition() { }

         NewsgroupTable* getRecordCountTable() {
             // We now only have one table
             return _newsgroupTable;
         }
         NewsgroupTable* getNewsgroupTable() {
             return _newsgroupTable;
         }
};

> Check next points:
>
> 1) if you use cursors then kill all cursors before you close db.
>
> 2) if you close db you do this before ValentinaShutdown call.

Yes, #2 was the problem.

In the Cocoa Demo code, it actually does the ValentinaShutdown
inside the [self close] method BEFORE deleting the databasedefinition.

I reversed the order of the lines of code and it works properly now.

Thank you very much!

Did you say someone had a more up-to-date Cocoa Demo?

- Matthew