My guess is that you are failing to mortalise the SV which you are populating with the inbound data. If you posted the code, it would probably be the work of a few minutes to confirm that or otherwise track the leak down.

The code is too substantial to post, but maybe there is something I have wrong WRT to mortality. 

#!/usr/bin/perl
use strict;
use warnings FATAL => qw(all);

use Inline 'C';

my $test = eg();

reportHash($test);
reportScalar($test->{x});

$test = undef;

__DATA__
__C__
SV *eg () {
    HV *rv = newHV();
    hv_store(rv, "x", 1, newSVpv("hello", 0), 0);
    return newRV_noinc((SV*)rv);
}

void reportHash (SV *ref) {
    HV *hash = (HV*)SvRV(ref);
    fprintf(stderr,"rc: %d\n", SvREFCNT((SV*)hash));
}

void reportScalar (SV *s) {
    fprintf(stderr,"rc: %d\n", SvREFCNT(s));
}

[download]
My understanding is that that since $test has a reference count of 1, and the SV inside it has a reference count of 1, that $test=undef should free the memory used. Running that in a while(1) loop seems to confirm this -- there is no growth. Where in this code do you see an issue? Everything else follows the same pattern (I am not using the inline stack).

In reply to Re^2: Tracing memory leak by halfcountplus
in thread Tracing memory leak by halfcountplus

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