Question about freeing segments in non contiguous main_arena

[Florian Weimer]

* Abhijit Ray Chaudhury:

> Hi Florian,
>
> Thanks a lot for your reply. When an application starts freeing memory
> and frees all the memory for one mmaped segment , where av->top
> currently points to , how av->top be adjusted ?
>
> My assumption is that if all the memory is freed by the application
> that belongs to main_arena , av->top should go back to the contiguous
> [heap] segment . This question pertains to the non-contiguous
> main_arena scenario .

I don't think this happens in the current implementation.  I'm not aware
of any data structures maintained by the code that would readily support
this.

Thanks,
Florian