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torture: Improve diagnostic for KCSAN-incapable compilers 

Using --kcsan when the compiler does not support KCSAN results in this:

:CONFIG_KCSAN=y: improperly set
:CONFIG_KCSAN_REPORT_ONCE_IN_MS=100000: improperly set
:CONFIG_KCSAN_VERBOSE=y: improperly set
:CONFIG_KCSAN_INTERRUPT_WATCHER=y: improperly set
Clean KCSAN run in /home/git/linux-rcu/tools/testing/selftests/rcutorture/res/2020.06.16-09.53.16

This is a bit obtuse, so this commit adds checks resulting in this:

:CONFIG_KCSAN=y: improperly set
:CONFIG_KCSAN_REPORT_ONCE_IN_MS=100000: improperly set
:CONFIG_KCSAN_VERBOSE=y: improperly set
:CONFIG_KCSAN_INTERRUPT_WATCHER=y: improperly set
Compiler or architecture does not support KCSAN!
Did you forget to switch your compiler with --kmake-arg CC=<cc-that-supports-kcsan>?

Suggested-by: Marco Elver <elver@google.com>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Acked-by: Marco Elver <elver@google.com>
This commit is contained in:
Paul E. McKenney 2020-06-16 10:38:57 -07:00
parent 6bcaf2a087
commit 61b77be09e
1 changed files with 7 additions and 2 deletions
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9
tools/testing/selftests/rcutorture/bin/kvm-recheck.sh
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@ -44,7 +44,8 @@ do
then
echo QEMU killed
fi
configcheck.sh $i/.config $i/ConfigFragment
configcheck.sh $i/.config $i/ConfigFragment > $T 2>&1
cat $T
if test -r $i/Make.oldconfig.err
then
cat $i/Make.oldconfig.err
@ -73,7 +74,11 @@ do
done
if test -f "$rd/kcsan.sum"
then
if test -s "$rd/kcsan.sum"
if grep -q CONFIG_KCSAN=y $T
then
echo "Compiler or architecture does not support KCSAN!"
echo Did you forget to switch your compiler with '--kmake-arg CC=<cc-that-supports-kcsan>'?
elif test -s "$rd/kcsan.sum"
then
echo KCSAN summary in $rd/kcsan.sum
else