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17af3bd4db
* tests/stack-overflow: Skip this test when the binary was built with ASAN, to avoid spurious failures.
54 lines
2.0 KiB
Bash
Executable File
54 lines
2.0 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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case $host_triplet in
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*-midnightbsd*)
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skip_ 'our stack-overflow detection does not work on this system';;
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esac
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# When compiled with ASAN, skip this test, because (on Fedora 32) it
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# would fail due to output like this on stderr:
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# +==2176827==WARNING: ASan is ignoring requested __asan_handle_no_return:
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# stack top: 0x7ffc48f20000; bottom 0x000000e25000; size: 0x7ffc480fb000 (140721517473792)
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# +False positive error reports may follow
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# +For details see https://github.com/google/sanitizers/issues/189
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ASAN_OPTIONS=help=true grep --version 2>&1 | grep -q AddressSanitizer \
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&& skip_ 'avoid false failure when built with ASAN'
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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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