+#!/bin/bash
+#
+# Copyright (C) 2017 Jonathan Rajotte <jonathan.rajotte-julien@efficios.com>
+#
+# SPDX-License-Identifier: LGPL-2.1-only
+
+CURDIR=$(dirname "$0")/
+TESTDIR=$CURDIR/../../../
+
+TMPDIR=$(mktemp -d)
+
+#This is needed since the testpoint create a pipe with the consumerd type suffixed
+TESTPOINT_BASE_PATH=$(readlink -f "$TMPDIR/lttng.t_p_n")
+TESTPOINT_PIPE_PATH=$(mktemp -u "${TESTPOINT_BASE_PATH}.XXXXXX")
+TESTPOINT=$(readlink -f "${CURDIR}/.libs/libpause_consumer.so")
+TESTAPP_STATE_PATH=$(mktemp -u "$TMPDIR/application_state.XXXXXXXXXX")
+
+
+SESSION_NAME="my_session"
+CHANNEL_NAME="my_channel"
+
+NUM_TESTS=104
+
+# shellcheck source=../../../utils/utils.sh
+source "$TESTDIR/utils/utils.sh"
+
+function kernel_event_generator_toggle_state
+{
+ kernel_event_generator_suspended=$((kernel_event_generator_suspended==0))
+}
+
+function generate_filter_events
+{
+ /bin/echo -n "10" > /proc/lttng-test-filter-event 2> /dev/null
+}
+
+function kernel_event_generator
+{
+ command_to_run=$1
+ state_file=$2
+ kernel_event_generator_suspended=0
+ trap kernel_event_generator_toggle_state SIGUSR1
+
+ while (true); do
+ if [[ $kernel_event_generator_suspended -eq "1" ]]; then
+ touch $state_file
+ sleep 0.5
+ else
+ if [[ -f $state_file ]]; then
+ rm $state_file 2> /dev/null
+ fi
+ $command_to_run
+ fi
+ done
+}
+
+function test_buffer_usage_notification
+{
+ local event_name="lttng_test_filter_event"
+ local trace_path
+ local page_size
+ local consumerd_pipe=()
+
+ trace_path=$(mktemp -d)
+ page_size=$(getconf PAGE_SIZE)
+
+ create_lttng_session_notap $SESSION_NAME "$trace_path"
+
+ lttng_enable_kernel_channel_notap $SESSION_NAME $CHANNEL_NAME \
+ --subbuf-size="$page_size"
+ enable_kernel_lttng_event_notap $SESSION_NAME $event_name $CHANNEL_NAME
+
+ kernel_event_generator generate_filter_events "$TESTAPP_STATE_PATH" &
+ APP_PID=$!
+
+ # This is needed since the testpoint create a pipe with the consumer
+ # type suffixed.
+ for f in "$TESTPOINT_BASE_PATH"*; do
+ consumerd_pipe+=("$f")
+ done
+
+ "$CURDIR/notification" 2 LTTNG_DOMAIN_KERNEL $SESSION_NAME $CHANNEL_NAME \
+ $APP_PID $TESTAPP_STATE_PATH ${consumerd_pipe[@]}
+
+ destroy_lttng_session_notap $SESSION_NAME
+
+ kill -9 $APP_PID
+ wait $APP_PID 2> /dev/null
+}
+
+if [ "$(id -u)" == "0" ]; then
+
+ validate_lttng_modules_present
+
+
+ modprobe lttng-test
+
+ # Used on sessiond launch.
+ LTTNG_SESSIOND_ENV_VARS="LTTNG_TESTPOINT_ENABLE=1 \
+ CONSUMER_PAUSE_PIPE_PATH=${TESTPOINT_PIPE_PATH} \
+ LD_PRELOAD=${TESTPOINT}"
+ start_lttng_sessiond_notap
+
+ test_buffer_usage_notification
+
+ stop_lttng_sessiond_notap
+ rmmod lttng-test
+
+ rm -rf "${consumerd_pipe[@]}" 2> /dev/null
+else
+ # Kernel tests are skipped.
+ plan_tests $NUM_TESTS
+ skip 0 "Root access is needed. Skipping all kernel notification tests." $NUM_TESTS
+fi
+
+rm -rf "$TMPDIR"