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check-block: enable iotests with SafeStack 

SafeStack is a stack protection technique implemented in llvm. It is
enabled with a -fsanitize flag.
iotests are currently disabled when any -fsanitize option is used,
because such options tend to produce additional warnings and false
positives.

While common -fsanitize options are used to verify the code and not
added in production, SafeStack's main use is in production environments
to protect against stack smashing.

Since SafeStack does not print any warning or false positive, enable
iotests when SafeStack is the only -fsanitize option used.
This is likely going to be a production binary and we want to make sure
it works correctly.

Signed-off-by: Daniele Buono <dbuono@linux.vnet.ibm.com>
Message-id: 20200529205122.714-5-dbuono@linux.vnet.ibm.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
This commit is contained in:
Daniele Buono 2020-05-29 16:51:22 -04:00 committed by Stefan Hajnoczi
parent 1e4f6065da
commit d6d1a65cca
1 changed files with 11 additions and 1 deletions
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12
tests/check-block.sh
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@ -21,7 +21,17 @@ if grep -q "CONFIG_GPROF=y" config-host.mak 2>/dev/null ; then
exit 0
fi
if grep -q "CFLAGS.*-fsanitize" config-host.mak 2>/dev/null ; then
# Disable tests with any sanitizer except for SafeStack
CFLAGS=$( grep "CFLAGS.*-fsanitize" config-host.mak 2>/dev/null )
SANITIZE_FLAGS=""
#Remove all occurrencies of -fsanitize=safe-stack
for i in ${CFLAGS}; do
if [ "${i}" != "-fsanitize=safe-stack" ]; then
SANITIZE_FLAGS="${SANITIZE_FLAGS} ${i}"
fi
done
if echo ${SANITIZE_FLAGS} | grep -q "\-fsanitize" 2>/dev/null; then
# Have a sanitize flag that is not allowed, stop
echo "Sanitizers are enabled ==> Not running the qemu-iotests."
exit 0
fi