diff options
| -rwxr-xr-x | tests/stack-overflow | 23 |
1 files changed, 16 insertions, 7 deletions
diff --git a/tests/stack-overflow b/tests/stack-overflow index 2042ebc5..69220455 100755 --- a/tests/stack-overflow +++ b/tests/stack-overflow @@ -3,14 +3,23 @@ . "${srcdir=.}/init.sh"; path_prepend_ ../src -# Too many open parentheses. -printf %080000d 0|tr 0 '(' > in || framework_failure_ echo grep: stack overflow > exp || framework_failure_ +# grep attempts to detect overflow via gnulib's c-stack module. +# Trigger that with an input regex composed solely of open parentheses, +# increasing the size of that input until grep emits the expected diagnostic. fail=0 -returns_ 2 grep -E -f in >out 2>err || fail=1 +for i in 1 3 5 10 20 30 40 50 100 200; do + # Create a file containing $i * 10000 open parentheses: + printf %0${i}0000d 0|tr 0 '(' > in || framework_failure_ + grep -E -f in >out 2>err; st=$? + if grep -q 'stack overflow' err; then + test $st = 2 || fail=1 + compare /dev/null out || fail=1 + compare exp err || fail=1 + test $fail = 0 && Exit 0 + fail_ 'printed "stack overflow", but something else was wrong' + fi +done -compare /dev/null out || fail=1 -compare exp err || fail=1 - -Exit $fail +fail_ 'grep never printed "stack overflow"' |