Live allocation iterator

SNL snl20465 at
Tue Mar 24 06:53:37 PDT 2015

If this is not possible ( I see an old post which says jemalloc does not
have this infra but that was back in 2012 ). Is it possible to iterate over
just an arena and dump all allocations in it  ? Basically, I have memory
pool implemented on top of jemalloc which holds metadata about all other
allocations jemalloc does, if I can iterate over this arena and get hold of
metadata, I can get hold of each allocation as well.

Any thoughts would be appreciated.

On Tue, Mar 24, 2015 at 5:28 PM, SNL <snl20465 at> wrote:

> My use case is to walk through all live allocations ( the ones which are
> not freed yet) of all sizes the program ever made and dump it as the end of
> the program or on demand. I have looked at stats but I want something with
> even more details. Basically, the function should be able to iterate
> through all arenas and print details on following lines:
> arena = 1 base = 0x7fd7beb88800 size = 15 bytes etc
> Is there any api in jemalloc which already does subset of this  ? Any
> pointers will be helpful.


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