Re: Memory Leak??

[red floyd]

nandakiran@gmail.com wrote:
> > What makes you think you have a memory leak?- Hide quoted text -
> >
> > - Show quoted text -
>  > when i run  ksysguard. it shows that my memory is not de-allocated,
> and around 40mb of memory
> is still being allocated to my program (after reaching printf("ok")).
> whereas, In the first case, after the end of delete's , only 4 mb of
> memory
> is allocated to my program.


So, that simply means the memory is allocated to the process.  In other 
words, to satisfy all 10000 of those extra new's, it had to get a pile 
of memory from the OS.  The delete's return it to the free store (it's 
*NOT* leaked), but the process does not return it to the OS. It's not 
required to, nor should it, since the allocator doesn't know if you're 
going to allocate more memory or not.

So the memory is freed (deleted), but just not returned to the OS -- 
it's still allocated to your process' memory space.

This is why using tools like top or ksysguard to detect leaks is fairly 
useless.  Use valgrind instead.