tests: Add support for using Linux kernel tracing functionality

run-all.sh and start.sh scripts can now take 'trace' command line
argument to request Linux tracing information from mac80211, cfg80211,
and wpa_supplicant to be recorded.

Signed-hostap: Jouni Malinen <j@w1.fi>

tests/hwsim/run-all.sh

@@ -49,6 +49,20 @@ elif [ "x$1" = "xvalgrind" ]; then
 	tar czf /tmp/hwsim-tests-$DATE-FAILED-valgrind.tar.gz logs/$DATE*
 	exit 1
     fi
+elif [ "x$1" = "xtrace" ]; then
+    ./start.sh trace
+    DATE=`ls -1tr logs | tail -1 | cut -f1 -d-`
+    sudo trace-cmd record -o logs/$DATE-trace.dat -e mac80211 -e cfg80211 su $USER -c "./run-tests.py -l logs/$DATE-run -e logs/$DATE-failed" || errors=1
+    if [ -e logs/$DATE-failed ]; then
+	error=1
+    fi
+    sudo chown $USER logs/$DATE-trace.dat
+    cat logs/$DATE-run > logs/last-debug
+    ./stop-wifi.sh
+    if [ $errors -gt 0 ]; then
+	tar czf /tmp/hwsim-tests-$DATE-FAILED-trace.tar.gz logs/$DATE*
+	exit 1
+    fi
 else
     ./start.sh
     DATE=`ls -1tr logs | tail -1 | cut -f1 -d-`

tests/hwsim/start.sh

@@ -12,6 +12,12 @@ else
     unset VALGRIND
 fi
 
+if [ "x$1" = "xtrace" ]; then
+    TRACE="T"
+else
+    TRACE=""
+fi
+
 $DIR/stop-wifi.sh
 sudo modprobe mac80211_hwsim radios=5
 mkdir -p $DIR/logs
@@ -28,7 +34,7 @@ if [ "x$VALGRIND" = "xy" ]; then
     sudo valgrind --log-file=$DIR/logs/$DATE-valgrind-hostapd $HAPD -ddKt -g /var/run/hostapd-global -G admin -ddKt > $DIR/logs/$DATE-hostapd &
 else
     for i in 0 1 2; do
-	sudo $WPAS -g /tmp/wpas-wlan$i -Gadmin -Dnl80211 -iwlan$i -c $DIR/p2p$i.conf -ddKt > $DIR/logs/$DATE-log$i &
+	sudo $WPAS -g /tmp/wpas-wlan$i -Gadmin -Dnl80211 -iwlan$i -c $DIR/p2p$i.conf -ddKt$TRACE > $DIR/logs/$DATE-log$i &
     done
     sudo $HAPD -ddKt -g /var/run/hostapd-global -G admin -ddKt > $DIR/logs/$DATE-hostapd &
 fi