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|
#!/bin/sh
# Script to verify that stack overflow is diagnosed properly when
# there is infinite macro call nesting.
# (causes coredump in m4-1.0.3)
# On some systems the ulimit command is available in ksh or bash but not sh
(exec 2>/dev/null; ulimit -HSs 300) || {
for altshell in bash bsh ksh ; do
if (exec >/dev/null 2>&1; $altshell -c 'ulimit -HSs 300') &&
test -z "$1"
then
echo "Using $altshell because it supports ulimit"
exec $altshell $0 running-with-$altshell
exit 9
fi
done
}
PATH=.:..:$PATH; export PATH;
M4=m4
type $M4
tmpfile=/tmp/t.$$
trap 'rm -f $tmpfile; exit 1' 1 2 3 15
rm -f core
perl -e '
# Generate nested define sequence
$max=1000000;
for ($i=0; $i<$max; $i++) {
print "define(X$i,\n";
}
for ($i=$max-1; $i>=0; $i--) {
print "body with substance no. $i)dnl\n"
}
' | \
(
# Limit the stack size if the shell we are running permits it
if (exec 2>/dev/null; ulimit -HSs 50)
then
(exec >/dev/null 2>&1; ulimit -v) && ulimitdashv=ok
ulimit -HSs 50
#ulimit -HSd 8000
#test -n "$ulimitdashv" && ulimit -HSv 8000
echo "Stack limit is `ulimit -s`K";
echo "Heap limit is `ulimit -d`K";
test -n "$ulimitdashv" &&
echo "VMem limit is `ulimit -v`K";
else
echo "Can't reset stack limit - this may take a while..."
fi
$M4 -L999999999 > $tmpfile 2>&1
)
result=$?
exitcode=1
if test $result -eq 0 ; then
echo "TEST DID NOT WORK - m4 did not abort. Output:"
else
# See if stack overflow was diagnosed
case "`cat $tmpfile`" in
*overflow*)
echo "Test succeeded.";
exitcode=0
;;
*ut*of*emory*)
echo "*** Test is INCONCLUSIVE (ran out of heap before stack overflow)";
;;
*) echo "*** Test FAILED. $M4 aborted unexpectedly. Output:";
;;
esac
fi
if test -f core ; then
ls -l core
exitcode=1
fi
#(test $exitcode -ne 0) &&
{ echo "Output from $M4:"; cat $tmpfile; }
exit $exitcode
|
