FULL_LTTNG_BIN="${TESTDIR}/../src/bin/lttng/${LTTNG_BIN}"
FULL_LTTNG_SESSIOND_BIN="${TESTDIR}/../src/bin/lttng-sessiond/lttng-sessiond"
-UST_NUM_TESTS=18
-KERNEL_NUM_TESTS=17
+UST_NUM_TESTS=15
+DESTRUCTIVE_TESTS_NUM=8
+KERNEL_NUM_TESTS=$((14 + $DESTRUCTIVE_TESTS_NUM))
NUM_TESTS=$(($UST_NUM_TESTS + $KERNEL_NUM_TESTS))
plan_tests $NUM_TESTS
+function trigger_get_discarded_notif_number()
+{
+ local trigger_name="$1"
+ local list_triggers_stdout=$(mktemp -t list_triggers_stdout.XXXXXX)
+
+ "$FULL_LTTNG_BIN" list-triggers > "$list_triggers_stdout"
+
+ cat "$list_triggers_stdout" | grep -a7 "$trigger_name" | tail -1 | grep --quiet "errors: none"
+ ret=$?
+
+ if [ "$ret" -eq "0" ]; then
+ notif_nb="0"
+ else
+ notif_nb=$(cat "$list_triggers_stdout" | grep -a8 "$trigger_name" | tail -1 | grep "discarded tracer messages" | cut -d' ' -f8)
+ fi
+
+ rm -f "$list_triggers_stdout"
+
+ # Printing the value to that the caller can get it back.
+ echo "$notif_nb"
+}
+
function test_kernel_notifier_discarded_count
{
local sessiond_pipe=()
--condition on-event --kernel lttng_test_filter_event \
--action notify
- "$FULL_LTTNG_BIN" list-triggers > "$list_triggers_stdout"
-
- # Confirm that the discarded notification line is not present.
- cat "$list_triggers_stdout" | grep -v --quiet "discarded tracer messages"
- ok $? "No discarded tracer notification message"
-
- tail -n 1 "$list_triggers_stdout" | grep --quiet "errors: none"
- ok $? "Trigger 'errors: none' notification message"
+ trigger_discarded_nb=$(trigger_get_discarded_notif_number "$trigger_name")
+ is $trigger_discarded_nb 0 "No discarded tracer notification"
# Stop consumption of notifier tracer notifications.
diag "Pause consumption of tracer messages"
# is lost in subbuffer boundaries.
echo -n "2000" > /proc/lttng-test-filter-event
- "$FULL_LTTNG_BIN" list-triggers > "$list_triggers_stdout"
-
- # Confirm that the discarded notification line is present. To avoid
- # false positives.
- cat "$list_triggers_stdout" | grep --quiet "discarded tracer messages"
- ok $? "Tracer notification discarded line printed"
-
- # Confirm that the number of dicarded tracer messages is not zero.
- cat "$list_triggers_stdout" | grep --quiet "discarded tracer messages: 0"
- isnt $? 0 "Discarded tracer notification number non-zero as expected"
+ # Confirm that the number of tracer notifications discarded is non-zero.
+ trigger_discarded_nb=$(trigger_get_discarded_notif_number "$trigger_name")
+ isnt $trigger_discarded_nb 0 "Discarded tracer notification number non-zero ($trigger_discarded_nb) as expected"
lttng_remove_trigger_ok "$trigger_name"
--condition on-event --kernel lttng_test_filter_event \
--action notify
- "$FULL_LTTNG_BIN" list-triggers > "$list_triggers_stdout"
-
- # Confirm that the discarded notification line is not present.
- cat "$list_triggers_stdout" | grep -v --quiet "discarded tracer messages"
- ok $? "No discarded tracer notification message"
-
- tail -n 1 "$list_triggers_stdout" | grep --quiet "errors: none"
- ok $? "Trigger 'errors: none' notification message"
+ trigger_discarded_nb=$(trigger_get_discarded_notif_number "$trigger_name")
+ is $trigger_discarded_nb 0 "No discarded tracer notification"
lttng_remove_trigger_ok "$trigger_name"
{
local sessiond_pipe=()
local trigger_name="my_trigger"
- local list_triggers_stdout=$(mktemp -t list_triggers_stdout.XXXXXX)
local NR_USEC_WAIT=0
local PIPE_SIZE
local NR_ITER
--condition on-event --userspace tp:tptest \
--action notify
- "$FULL_LTTNG_BIN" list-triggers > "$list_triggers_stdout"
-
- # Confirm that the discarded notification line is not present.
- cat "$list_triggers_stdout" | grep -v --quiet "discarded tracer messages"
- ok $? "No discarded tracer notification message"
-
- tail -n 1 "$list_triggers_stdout" | grep --quiet "errors: none"
- ok $? "Trigger 'errors: none' notification message"
+ trigger_discarded_nb=$(trigger_get_discarded_notif_number "$trigger_name")
+ is $trigger_discarded_nb 0 "No discarded tracer notification"
# Stop consumption of notifier tracer notifications.
diag "Pause consumption of tracer messages"
$TESTAPP_BIN -i $NR_ITER -w $NR_USEC_WAIT
ok $? "Generating $NR_ITER tracer notifications"
- "$FULL_LTTNG_BIN" list-triggers > "$list_triggers_stdout"
-
- # Confirm that the discarded notification line is present. To avoid
- # false positive.
- cat "$list_triggers_stdout" | grep --quiet "discarded tracer messages"
- ok $? "Tracer notification discarded line printed"
-
- # Confirm that the number of discarded tracer messages is not zero.
- cat "$list_triggers_stdout" | grep --quiet "discarded tracer messages: 0"
- isnt $? 0 "Discarded tracer notification number non-zero as expected"
+ # Confirm that the number of tracer notifications discarded is non-zero.
+ trigger_discarded_nb=$(trigger_get_discarded_notif_number "$trigger_name")
+ isnt $trigger_discarded_nb 0 "Discarded tracer notification number non-zero ($trigger_discarded_nb) as expected"
# Remove the notifier.
lttng_remove_trigger_ok "$trigger_name"
--condition on-event --userspace tp:tptest \
--action notify
- # Confirm that the discarded notification line is not present.
- "$FULL_LTTNG_BIN" list-triggers > "$list_triggers_stdout"
-
- # Confirm that the discarded notification line is not present.
- cat "$list_triggers_stdout" | grep -v --quiet "discarded tracer messages"
- ok $? "No discarded tracer notification message"
-
- tail -n 1 "$list_triggers_stdout" | grep --quiet "errors: none"
- ok $? "Trigger 'errors: none' notification message"
+ trigger_discarded_nb=$(trigger_get_discarded_notif_number "$trigger_name")
+ is $trigger_discarded_nb 0 "No discarded tracer notification"
lttng_remove_trigger_ok "$trigger_name"
stop_lttng_sessiond_notap
unset LTTNG_SESSIOND_ENV_VARS
-
- rm -f "$list_triggers_stdout"
}
+
function test_ust_notifier_discarded_count_max_bucket
{
start_lttng_sessiond "" "--event-notifier-error-buffer-size-userspace=3"
stop_lttng_sessiond_notap
}
+function test_ust_notifier_discarded_count_multi_uid
+{
+ local sessiond_pipe=()
+ local root_trigger_name="root_trigger"
+ local user_trigger_name="user_trigger"
+ local list_triggers_stdout=$(mktemp -t list_triggers_stdout.XXXXXX)
+ local NR_USEC_WAIT=0
+ local PIPE_SIZE
+ local NR_ITER
+ local new_user="dummy_lttng_test_user"
+
+ diag "UST event notifer error counter multiple UIDs"
+
+ # Create a dummy user to run test apps as.
+ useradd --no-create-home "$new_user"
+ new_uid=$(id -u "$new_user")
+
+ PIPE_SIZE=$("$CURDIR"/default_pipe_size_getter)
+ if [ $? -ne 0 ]; then
+ BAIL_OUT "Failed to get system default pipe size"
+ else
+ diag "Default system pipe size: $PIPE_SIZE bytes"
+ fi
+
+ # Find the number of events needed to overflow the event notification
+ # pipe buffer. Each LTTng-UST notification is at least 42 bytes long.
+ # Double that number to ensure enough events are created to overflow
+ # the buffer.
+ NR_ITER=$(( (PIPE_SIZE / 42) * 2 ))
+ diag "Test applications will emit $NR_ITER events"
+
+ # Used on sessiond launch.
+ LTTNG_SESSIOND_ENV_VARS="LTTNG_TESTPOINT_ENABLE=1 \
+ NOTIFIER_PAUSE_PIPE_PATH=${TESTPOINT_PIPE_PATH} \
+ LD_PRELOAD=${TESTPOINT}"
+
+ start_lttng_sessiond_notap
+
+ # This is needed since the testpoint create a pipe with the sessiond
+ # type suffixed.
+ for f in "$TESTPOINT_BASE_PATH"*; do
+ sessiond_pipe+=("$f")
+ done
+
+ lttng_add_trigger_ok "$root_trigger_name" \
+ --condition on-event --userspace tp:tptest \
+ --action notify
+
+ lttng_add_trigger_ok "$user_trigger_name" --user-id "$new_uid" \
+ --condition on-event --userspace tp:tptest \
+ --action notify
+
+ # Stop consumption of notifier tracer notifications.
+ echo -n 1 > $sessiond_pipe
+
+ $TESTAPP_BIN -i $NR_ITER -w $NR_USEC_WAIT
+ ok $? "Generating $NR_ITER tracer notifications as UID: $(id -u)"
+
+ su "$new_user" -c "$TESTAPP_BIN -i $NR_ITER -w $NR_USEC_WAIT"
+ ok $? "Generating $NR_ITER tracer notifications as UID: $new_uid"
+
+ root_trigger_discarded_nb=$(trigger_get_discarded_notif_number "$root_trigger_name")
+ user_trigger_discarded_nb=$(trigger_get_discarded_notif_number "$user_trigger_name")
+
+ isnt $root_trigger_discarded_nb 0 \
+ "Root trigger discard notifications number ($root_trigger_discarded_nb) is non-zero"
+ isnt $user_trigger_discarded_nb 0 \
+ "User trigger discard notifications number ($user_trigger_discarded_nb) is non-zero"
+
+ lttng_remove_trigger_ok "$root_trigger_name"
+ lttng_remove_trigger_ok "$user_trigger_name" --user-id "$new_uid"
+
+ stop_lttng_sessiond_notap
+
+ unset LTTNG_SESSIOND_ENV_VARS
+
+ userdel "$new_user"
+ rm -f "$list_triggers_stdout"
+}
+
test_ust_notifier_discarded_count
test_ust_notifier_discarded_count_max_bucket
modprobe lttng-test
test_kernel_notifier_discarded_count
-
test_kernel_notifier_discarded_count_max_bucket
+ if destructive_tests_enabled ; then
+ # This test adds a new user on the system. Since it's a quite
+ # intrusive change to the system, we decide to only run it when
+ # the user knows what they are doing.
+ test_ust_notifier_discarded_count_multi_uid
+ else
+ skip 0 "You need to set the LTTNG_ENABLE_DESTRUCTIVE_TESTS environment variable to \"will-break-my-system\" to run this test" $DESTRUCTIVE_TESTS_NUM
+ fi
+
modprobe --remove lttng-test
rm -rf "${sessiond_pipe[@]}" 2> /dev/null
projects / lttng-tools.git / commitdiff
