[ast-developers] ksh memory leak

[Michal Hlavinka]

Hi,

we found there is a memory leak in ksh (in both latest stable 2012-08-01
and latest development version 2014-01-14).

The reproducer is following:

#################################################
#!/bin/ksh

function myFunction
{
typeset toPrint="something"
echo "${toPrint}"
}

TOPCOUNT=10000
print ${.sh.version}

pmap -x $$ |tail -1
for (( j=0; j<100; j++)); do
start=$SECONDS

for (( i=0; i<TOPCOUNT; i++)); do
state=$(myFunction)
done
((b=SECONDS-start))
printf "%3.4f " $b
pmap -x $$ |tail -1
done
#################################################

ksh eats more and more memory:

Version AIJM 93v- 2014-01-14
total kB 123468 2076 372
0.2329 total kB 123468 3180 1380
0.2049 total kB 123468 4132 2332
0.2042 total kB 123468 5008 3208
0.2034 total kB 127564 5964 4164
0.2007 total kB 127564 6932 5132

I've noticed that the latest tarball is in beta directory, not alpha. Is
stable release close? Should we test it more thoroughly?

Michal