From 26ac732b006795448eee5be2f4513ece875032b6 Mon Sep 17 00:00:00 2001
From: Jens Axboe <axboe@kernel.dk>
Date: Mon, 15 Jun 2020 10:49:27 -0600
Subject: test/runtests.sh: add dmesg check

Lifted this from blktests, basically it just checks for known patterns
of kernel complaints. If we trigger one while running a test, we fail
the test case.

Signed-off-by: Jens Axboe <axboe@kernel.dk>
---
 .gitignore       |  1 +
 Makefile         |  2 +-
 test/runtests.sh | 54 ++++++++++++++++++++++++++++++++++++++++++++++++++----
 3 files changed, 52 insertions(+), 5 deletions(-)

diff --git a/.gitignore b/.gitignore
index fee76e8..48964d1 100644
--- a/.gitignore
+++ b/.gitignore
@@ -88,6 +88,7 @@
 /test/timeout
 /test/timeout-overflow
 /test/config.local
+/test/*.dmesg
 
 config-host.h
 config-host.mak
diff --git a/Makefile b/Makefile
index 05d5879..948e004 100644
--- a/Makefile
+++ b/Makefile
@@ -56,7 +56,7 @@ install-tests:
 	@$(MAKE) -C test install prefix=$(DESTDIR)$(prefix) datadir=$(DESTDIR)$(datadir)
 
 clean:
-	@rm -f config-host.mak config-host.h cscope.out $(NAME).pc
+	@rm -f config-host.mak config-host.h cscope.out $(NAME).pc test/*.dmesg
 	@$(MAKE) -C src clean
 	@$(MAKE) -C test clean
 	@$(MAKE) -C examples clean
diff --git a/test/runtests.sh b/test/runtests.sh
index f2fbe5d..d2e9f73 100755
--- a/test/runtests.sh
+++ b/test/runtests.sh
@@ -7,9 +7,9 @@ TIMEOUT=30
 FAILED=""
 MAYBE_FAILED=""
 
-do_kmsg="yes"
+do_kmsg="1"
 if ! [ $(id -u) = 0 ]; then
-	do_kmsg="no"
+	do_kmsg="0"
 fi
 
 TEST_DIR=$(dirname $0)
@@ -24,13 +24,51 @@ if [ -f "$TEST_DIR/config.local" ]; then
 	done
 fi
 
+_check_dmesg()
+{
+	local dmesg_marker="$1"
+	local seqres="$2.seqres"
+
+	if [[ $do_kmsg -eq 0 ]]; then
+		return 0
+	fi
+
+	dmesg | bash -c "$DMESG_FILTER" | grep -A 9999 "$dmesg_marker" >"${seqres}.dmesg"
+	grep -q -e "kernel BUG at" \
+	     -e "WARNING:" \
+	     -e "BUG:" \
+	     -e "Oops:" \
+	     -e "possible recursive locking detected" \
+	     -e "Internal error" \
+	     -e "INFO: suspicious RCU usage" \
+	     -e "INFO: possible circular locking dependency detected" \
+	     -e "general protection fault:" \
+	     -e "blktests failure" \
+	     "${seqres}.dmesg"
+	# shellcheck disable=SC2181
+	if [[ $? -eq 0 ]]; then
+		return 1
+	else
+		rm -f "${seqres}.dmesg"
+		return 0
+	fi
+}
+
 run_test()
 {
 	T="$1"
 	D="$2"
-	if [ "$do_kmsg" = "yes" ]; then
-		echo Running test $T $D | tee /dev/kmsg
+	DMESG_FILTER="cat"
+
+	if [ "$do_kmsg" -eq 1 ]; then
+		if [ -z "$D" ]; then
+			local dmesg_marker="Running test $T:"
+		else
+			local dmesg_marker="Running test $T $D:"
+		fi
+		echo $dmesg_marker | tee /dev/kmsg
 	else
+		local dmesg_marker=""
 		echo Running test $T $D
 	fi
 	timeout --preserve-status -s INT $TIMEOUT ./$T $D
@@ -45,6 +83,14 @@ run_test()
 			FAILED="$FAILED <$T $D>"
 		fi
 		RET=1
+	elif ! _check_dmesg "$dmesg_marker" "$T"; then
+		echo "Test $T failed dmesg check"
+		if [ -z "$D" ]; then
+			FAILED="$FAILED <$T>"
+		else
+			FAILED="$FAILED <$T $D>"
+		fi
+		RET=1
 	elif [ ! -z "$D" ]; then
 		sleep .1
 		ps aux | grep "\[io_wq_manager\]" > /dev/null
-- 
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