«

hi pals,

While running my win 32 console application, Global variable becomes NULL at
some times, which was already allocated. My application got affected by some
memory violation it seems or any other reason for getting such violation..
How to find the stack memory violation? I need your help.

Forgive me if this is not a relevant group, please give me appropriate news
group for this query.


@ Shahul.

If the variable is global, then there is no stack involved to store it's
content. If you have multiple threads that're accessing your variable then
you should pay attention to syncronizing access to it. Another advice is to
set breakpoint to variable.

--
Vladimir
http://spaces.msn.com/vladimir-scherbina/

"shahul" <> wrote in message
news:%...
> hi pals,
>
> While running my win 32 console application, Global variable becomes NULL
> at some times, which was already allocated. My application got affected by
> some memory violation it seems or any other reason for getting such
> violation..
> How to find the stack memory violation? I need your help.
>
> Forgive me if this is not a relevant group, please give me appropriate
> news group for this query.
>
>
> @ Shahul.
>

dear Vladmir,

Actually my application is not multithreaded.
I have verfied the heap memory violation using _heapchk(), it says that
there is no heap violation.
Inadvertently, that Global variable becomes NULL, which was dynamically
allocated earlier.
I have doubt abt the frame allocated variables , in which the some data may
be asssigned out of bound.

@ Shahul.


"Scherbina Vladimir" <> wrote in message
news:...
> If the variable is global, then there is no stack involved to store it's
> content. If you have multiple threads that're accessing your variable then
> you should pay attention to syncronizing access to it. Another advice is
> to set breakpoint to variable.
>
> --
> Vladimir
> http://spaces.msn.com/vladimir-scherbina/
>
> "shahul" <> wrote in message
> news:%...
>> hi pals,
>>
>> While running my win 32 console application, Global variable becomes NULL
>> at some times, which was already allocated. My application got affected
>> by some memory violation it seems or any other reason for getting such
>> violation..
>> How to find the stack memory violation? I need your help.
>>
>> Forgive me if this is not a relevant group, please give me appropriate
>> news group for this query.
>>
>>
>> @ Shahul.
>>
>
>

Hm, let's check that on the "lower" layer - set a "data" breakpoint - when
you debug application choose "Debug->New Breakpoint->New Data Breakpoint..."
and type address of your variable and check who is rewriting that address
....

--
Vladimir
http://spaces.msn.com/vladimir-scherbina/

In addition to what Scherbina recommened, I'd take a look at variables that
are declared around the one in question and see if you have any arrays going
out of bounds or data that is too small for its contents.

Tom

"shahul" <> wrote in message
news:%...
> hi pals,
>
> While running my win 32 console application, Global variable becomes NULL
> at some times, which was already allocated. My application got affected by
> some memory violation it seems or any other reason for getting such
> violation..
> How to find the stack memory violation? I need your help.
>
> Forgive me if this is not a relevant group, please give me appropriate
> news group for this query.
>
>
> @ Shahul.
>