Determing Heap and stack size of running process.

[SHAMANTHA KRISHNA K G]

Any idea about the fields which have no PRT( I mean no protections flag set
--- no read no write no execute) and no flags and with mapping type 'df' ?.

Thanks ,
-Shamantha.

On Fri, 11 Sep 2020, 19:31 Ian Lepore, <ian at freebsd.org> wrote:

> On Fri, 2020-09-11 at 19:26 +0530, SHAMANTHA KRISHNA K G wrote:
> > Thank you for the heads up, I had tried  the output of procstat
> > -v  also
> > ,there also I am not getting any information about heap usage .
> >
> > Thanks
> > -Shamantha
> >
>
> The output does tell you about heap usage, but you have to interpret
> the type and flags to figure out which mappings are heap allocations,
> and the RES count to figure out how many pages of those mappings are
> actually in use (i.e., backed by physical ram).
>
> Iirc, the mappings with type 'df' and no flags set are the heap
> allocations, but I'm not positive of that.  Things with the D flag set
> are thread stacks.  I remember the manpage wasn't all that helpful in
> figuring that stuff out last time I needed to know.
>
> -- Ian
>
>
>
>
>
>
>
>
>
>
> > On Fri, 11 Sep 2020, 18:59 Ian Lepore, <ian at freebsd.org> wrote:
> >
> > > On Fri, 2020-09-11 at 16:36 +0530, SHAMANTHA KRISHNA K G wrote:
> > > > Hello All,
> > > >         I want to know the *size of heap and stack for a running
> > > > process* ,how
> > > > it can be done, if I* don't *see any* [stack ] *or* [heap]
> > > > *in  the
> > > > output
> > > > of */proc/pid/map*  and also the platform does not allow
> > > > installing
> > > > *third party
> > > > freebsd utilities like valgrind.*
> > > >
> > > > Thank you,
> > > > -Shamantha
> > > >
> > >
> > > Use procstat(1).  For example "procstat -v <pid>" will show all the
> > > memory mappings for that process.  If you need it from within a
> > > program
> > > you're writing, "man libprocstat" will get you some info on how
> > > procstat(1) does its work.
> > >
> > > -- Ian
> > >
> > >
> >
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