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71b19c5cbd
* tests/stack-overflow: Use ulimit to limit stack size. Otherwise, at least on gcc113, grep would fail to overflow its stack, so this test would fail to find the required diagnostic and would fail.
40 lines
1.3 KiB
Bash
Executable File
40 lines
1.3 KiB
Bash
Executable File
#!/bin/sh
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# Ensure a stack overflow no longer segfaults
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. "${srcdir=.}/init.sh"; path_prepend_ ../src
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echo grep: stack overflow > exp || framework_failure_
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# Limit stack size. Otherwise, it appears to be too hard to overflow the
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# stack on some systems like gcc113, aarch64/linux-3.13.0 with 32GB of RAM
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# and 20GB of swap.
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ulimit -s 8192 2>/dev/null
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# grep attempts to detect overflow via gnulib's c-stack module.
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# Trigger that with an input regex composed solely of open parentheses,
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# increasing the size of that input until grep emits the expected diagnostic.
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fail=0
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for i in 1 3 5 10 20 30 40 50 100 200 400 1000; do
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# Create a file containing $i * 10000 open parentheses:
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printf %0${i}0000d 0|tr 0 '(' > in || framework_failure_
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grep -E -f in >out 2>err; st=$?
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if grep -q 'stack overflow' err; then
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test $st = 2 || fail=1
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compare /dev/null out || fail=1
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compare exp err || fail=1
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test $fail = 0 && Exit 0
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fail_ 'printed "stack overflow", but something else was wrong'
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fi
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done
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# If there was no stack overflow message and the final run exited with
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# status 1 and both stdout and stderr were empty, then assume it's a working
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# regex that avoids the internal stack overflow problem like glibc's regexp
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# used to.
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test $st = 1 \
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&& ! test -s out \
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&& ! test -s err \
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&& Exit 0
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fail_ 'grep never printed "stack overflow"'
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