[lttng-tools.git] / tests / regression / tools / notification / test_notification_multi_app

#!/bin/bash
#
# Copyright (C) - 2017 Jonathan Rajotte <jonathan.rajotte-julien@efficiso.com>>
#
# This library is free software; you can redistribute it and/or modify it under
# the terms of the GNU Lesser General Public License as published by the Free
# Software Foundation; version 2.1 of the License.
#
# This library is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
# FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
# details.
#
# You should have received a copy of the GNU Lesser General Public License
# along with this library; if not, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA

TEST_DESC="Notification"

CURDIR=$(dirname $0)/
TESTDIR=$CURDIR/../../../

TESTPOINT=$(readlink -f ${CURDIR}/.libs/libpause_consumer.so)

TESTAPP_PATH="$TESTDIR/utils/testapp"
TESTAPP_NAME="gen-ust-events"
TESTAPP_BIN="$TESTAPP_PATH/$TESTAPP_NAME/$TESTAPP_NAME"
TESTAPP_STATE_FILE="$(mktemp -u)"

NR_ITER=1000
NR_USEC_WAIT=5

SESSION_NAME="my_session"
CHANNEL_NAME="my_channel"


DIR=$(readlink -f $TESTDIR)

PAGE_SIZE=$(getconf PAGE_SIZE)

NUM_TEST_UST=50
NUM_TEST_KERNEL=50
NUM_TESTS=$(($NUM_TEST_UST + $NUM_TEST_KERNEL))

source $TESTDIR/utils/utils.sh

consumerd_pipe=()
file_sync_after_first_event=$(mktemp -u)

# MUST set TESTDIR before calling those functions
plan_tests $NUM_TESTS

print_test_banner "$TEST_DESC"

app_pids=()

function kernel_event_generator_toogle_state
{
	kernel_event_generator_suspended=$((kernel_event_generator_suspended==0))

}
function kernel_event_generator
{
	state_file=$1
	kernel_event_generator_suspended=0
	trap kernel_event_generator_toogle_state SIGUSR1
	trap "exit" SIGTERM SIGINT
	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
			echo -n "1000" > /proc/lttng-test-filter-event
		fi
	done
}

function ust_event_generator_toogle_state
{
	ust_event_generator_suspended=$((ust_event_generator_suspended==0))

}
function ust_event_generator
{
	state_file=$1
	ust_event_generator_suspended=0
	trap ust_event_generator_toogle_state SIGUSR1
	trap "exit" SIGTERM SIGINT
	while (true); do
		if [[ $ust_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
			taskset  -c 0 $TESTAPP_BIN $NR_ITER $NR_USEC_WAIT > /dev/null 2>&1
		fi
	done
}

function start_client {
	local pid=-1
	local output_file=$1
	local session_name=$2
	local channel_name=$3
	local domain_type=$4
	local buffer_usage_type=$5
	local buffer_usage_threshold_type=$6
	local buffer_usage_threshold_value=$7
	local nr_expected_notification=$8

	${CURDIR}/base_client ${session_name} ${channel_name} ${domain_type} ${buffer_usage_type} ${buffer_usage_threshold_type} ${buffer_usage_threshold_value} ${nr_expected_notification} > ${output_file} &
	pid=$!

	app_pids+=("$pid")
}

function wait_for_message ()
{
	local directory=$1
	local file_pattern=$2
	local message=$3

	for file in $directory/${file_pattern}*; do
		while(true); do
			# Check for "error" message
			grep -q "error:" ${file}
			app_error=$?
			if [ $app_error -eq "0" ] ; then
				# An error occurred
				fail "Waiting message: error logged see file content: ${message}, ${file}"
				return 1
			fi

			grep -q "${message}" ${file}
			if [[ "$?" -ne "0" ]]; then
				# Lookup failed restart loop
				diag "Lookup failed sleep and retry grep for: ${message}, ${file}"
				sleep 0.25
				continue
			fi
			break
		done
	done
	pass "Message received: ${message}"
	return 0
}

function print_errors ()
{
	local directory=$1
	local file_pattern=$2

	for file in $directory/${file_pattern}*; do
		# Check for "error" message
		error_message=$(grep "error:" ${file})
		if [[ "${error_message}x" != "x" ]]; then
			diag "Errors for application ${file}:"
			diag "${error_message}"
		fi
	done
}

function comm_consumerd ()
{
	local message=$1
	local pipe=$2
	echo -ne "${message}" > "${pipe}"
}

function stop_consumerd ()
{
	local pipe=$1
	comm_consumerd "1" "$pipe"
}

function resume_consumerd ()
{
	local pipe=$1
	comm_consumerd "\0" "$pipe"
}

function test_multi_app ()
{
	local domain_type=$1
	local event_generator_pid=$2

	local app_pids=()
	local low_output_file_pattern="low_app_output_file_"
	local high_output_file_pattern="high_app_output_file_"
	local output_dir=$(mktemp -d)

	local testpoint_base_path=$(readlink -f "$output_dir/lttng.t_p_n_multi_app")
	local testpoint_pipe_path=$(mktemp -u "${testpoint_base_path}.XXXXXX")

	local nr_notification_expected=5
	local nr_client_app=50
	local domain_string=""
	local event_name=""

	case $domain_type in
		ust)
			domain_string=LTTNG_DOMAIN_UST
			event_name="tp:tptest"
			;;
		kernel)
			domain_string=LTTNG_DOMAIN_KERNEL
			event_name="lttng_test_filter_event"
			;;
		*)
			fail "Invalid domain type"
			exit 1
			;;
	esac

	# Setup
	LTTNG_SESSIOND_ENV_VARS="LTTNG_TESTPOINT_ENABLE=1 CONSUMER_PAUSE_PIPE_PATH=${testpoint_pipe_path} LD_PRELOAD=${TESTPOINT}"
	start_lttng_sessiond

	create_lttng_session_ok $SESSION_NAME $TRACE_PATH
	enable_${domain_type}_lttng_channel_ok $SESSION_NAME $CHANNEL_NAME --subbuf-size=$PAGE_SIZE
	enable_${domain_type}_lttng_event_ok $SESSION_NAME $event_name $CHANNEL_NAME

	# Fetch consumerd testpoint pipe information
	# This is needed since the testpoint create a pipe with the consumer type suffixed
	consumerd_pipe=()
	for f in "$testpoint_pipe_path"*; do
		consumerd_pipe+=("$f")
	done

	for (( i = 0; i < $nr_client_app; i++ )); do
		low_app_output_file=$output_dir/${low_output_file_pattern}${i}
		high_app_output_file=$output_dir/${high_output_file_pattern}${i}
		start_client $low_app_output_file $SESSION_NAME $CHANNEL_NAME $domain_string LOW RATIO 0.0 $nr_notification_expected
		start_client $high_app_output_file $SESSION_NAME $CHANNEL_NAME $domain_string HIGH RATIO 0.420 $nr_notification_expected
	done

	wait_for_message $output_dir "${low_output_file_pattern}" "sync: ready"
	wait_for_message $output_dir "${high_output_file_pattern}" "sync: ready"

	# Test notification reception
	for (( i = 0; i < $nr_notification_expected; i++ )); do

		# Stop consumerd consumption to force high notification
		start_lttng_tracing_ok $SESSION_NAME
		for pipe in "${consumerd_pipe[@]}"; do
			stop_consumerd "${pipe}"
		done

		wait_for_message $output_dir "${high_output_file_pattern}" "notification: high $i"

		# Put application in suspend mode to prevent double low
		# notification and synchronize on state file.
		kill -s SIGUSR1 $event_generator_pid
		while [ ! -f "${TESTAPP_STATE_FILE}" ]; do
			sleep 0.5
		done

		# Resume consumerd
		for pipe in "${consumerd_pipe[@]}"; do
			resume_consumerd "${pipe}"
		done
		# Stop tracing forcing full buffer consumption
		stop_lttng_tracing_ok $SESSION_NAME

		# Check for notifications reception
		wait_for_message $output_dir "${low_output_file_pattern}" "notification: low $i"
		ret=$?
		ok $ret "Notifications $i received"
		if [[ $ret -ne "0" ]]; then
			# Error occurred bail out
			break;
		fi

		# Put application in active mode and synchronize on state file.
		kill -s SIGUSR1 $event_generator_pid
		while [ -f "${TESTAPP_STATE_FILE}" ]; do
			sleep 0.5
		done
	done

	wait_for_message $output_dir "${low_output_file_pattern}" "exit: 0"
	ret=$?
	ok $ret "Application for low notification terminated normally"
	if [[ $ret -ne "0" ]]; then
		print_errors $output_dir "${low_output_file_pattern}"
	fi

	wait_for_message $output_dir "${high_output_file_pattern}" "exit: 0"
	ret=$?
	ok $ret "Application for high notification terminated normally"
	if [[ $ret -ne "0" ]]; then
		print_errors $output_dir "${high_output_file_pattern}"
	fi

	rm -rf $output_dir

	destroy_lttng_session_ok $SESSION_NAME
	stop_lttng_sessiond

	for pipe in "${consumerd_pipe[@]}"; do
		rm -rf "${pipe}"
	done
}

function test_multi_app_ust ()
{
	diag "Multi client app UST notification"
	ust_event_generator $TESTAPP_STATE_FILE &
	local generator_pid=$!

	test_multi_app ust $generator_pid

	kill -s SIGTERM $generator_pid 2> /dev/null
	wait $generator_pid 2> /dev/null
	rm -rf ${TESTAPP_STATE_FILE} 2> /dev/null
}

function test_multi_app_kernel ()
{
	diag "Multi client app kernel notification"
	modprobe lttng-test

	kernel_event_generator $TESTAPP_STATE_FILE &
	local generator_pid=$!

	test_multi_app kernel $generator_pid


	kill -s SIGTERM $generator_pid 2> /dev/null
	wait $generator_pid 2> /dev/null
	rm -rf ${TESTAPP_STATE_FILE} 2> /dev/null

	rmmod lttng-test
}

function test_on_register_evaluation_ust ()
{
	diag "On register notification UST"

	# Start app in infinite loop
	ust_event_generator $TESTAPP_STATE_FILE &
	local generator_pid=$!

	test_on_register_evaluation ust $generator_pid

	kill -s SIGTERM $generator_pid 2> /dev/null
	wait $generator_pid 2> /dev/null
	rm -rf ${TESTAPP_STATE_FILE} 2> /dev/null

}

function test_on_register_evaluation_kernel()
{
	diag "On register notification kernel"

	modprobe lttng-test

	kernel_event_generator $TESTAPP_STATE_FILE &
	local generator_pid=$!

	test_on_register_evaluation kernel $generator_pid


	kill -s SIGTERM $generator_pid 2> /dev/null
	wait $generator_pid 2> /dev/null
	rm -rf ${TESTAPP_STATE_FILE} 2> /dev/null

	rmmod lttng-test
}

function test_on_register_evaluation ()
{
	local domain_type=$1
	local event_generator_pid=$2

	local app_pids=()
	local high_output_file_pattern="high_app_output_file_on_register_evaluation"

	local output_dir=$(mktemp -d)
	local testpoint_base_path=$(readlink -f "$output_dir/lttng.t_p_n_register_evaluation")
	local testpoint_pipe_path=$(mktemp -u "${testpoint_base_path}.XXXXXX")
	local domain_string=""
	local event_name=""

	case $domain_type in
		ust)
			domain_string=LTTNG_DOMAIN_UST
			event_name="tp:tptest"
			;;
		kernel)
			domain_string=LTTNG_DOMAIN_KERNEL
			event_name="lttng_test_filter_event"
			;;
		*)
			fail "Invalid domain type"
			exit 1
			;;
	esac

	# Setup
	LTTNG_SESSIOND_ENV_VARS="LTTNG_TESTPOINT_ENABLE=1 CONSUMER_PAUSE_PIPE_PATH=${testpoint_pipe_path} LD_PRELOAD=${TESTPOINT}"
	start_lttng_sessiond

	create_lttng_session_ok $SESSION_NAME $TRACE_PATH
	enable_${domain_type}_lttng_channel_ok $SESSION_NAME $CHANNEL_NAME --subbuf-size=$PAGE_SIZE
	enable_${domain_type}_lttng_event_ok $SESSION_NAME $event_name $CHANNEL_NAME

	# Fetch consumerd testpoint pipe information
	# This is needed since the testpoint create a pipe with the consumer type suffixed
	consumerd_pipe=()
	for f in "$testpoint_pipe_path"*; do
		consumerd_pipe+=("$f")
	done

	high_app_output_file=${high_output_file_pattern}.first_receiver
	high_app_output_path=$output_dir/${high_app_output_file}
	start_client $high_app_output_path $SESSION_NAME $CHANNEL_NAME $domain_string HIGH RATIO 0.420 1

	wait_for_message $output_dir "${high_app_output_file}" "sync: ready"

	# Stop consumerd consumption to force high notification
	start_lttng_tracing_ok $SESSION_NAME

	for pipe in "${consumerd_pipe[@]}"; do
		stop_consumerd "${pipe}"
	done

	wait_for_message $output_dir "${high_app_output_file}" "notification: high 0"

	# Start a second receiver, the receiver should receive a high
	# notification on subscription
	high_app_output_file=${high_output_file_pattern}.second_receiver
	high_app_output_path=$output_dir/${high_app_output_file}
	start_client $high_app_output_path $SESSION_NAME $CHANNEL_NAME $domain_string HIGH RATIO 0.420 1
	wait_for_message $output_dir "${high_app_output_file}" "sync: ready"
	wait_for_message $output_dir "${high_app_output_file}" "notification: high 0"

	# Resume consumerd
	for pipe in "${consumerd_pipe[@]}"; do
		resume_consumerd "${pipe}"
	done

	wait_for_message $output_dir "${high_output_file_pattern}" "exit: 0"
	ret=$?
	ok $ret "Application for high notification terminated normally"
	if [[ $ret -ne "0" ]]; then
		# Keep the file
		print_errors "${high_output_file_pattern}"
	fi

	rm -rf $output_dir

	destroy_lttng_session_ok $SESSION_NAME
	stop_lttng_sessiond

	kill -s SIGTERM $generator_pid 2> /dev/null
	wait $generator_pid 2> /dev/null

	for pipe in "${consumerd_pipe[@]}"; do
		rm -rf "${pipe}"
	done

}


TESTS=(
	test_multi_app_ust
	test_on_register_evaluation_ust
)

if [ "$(id -u)" == "0" ]; then
	TESTS+=(
	test_multi_app_kernel
	test_on_register_evaluation_kernel
)
else
        skip 0 "Root access is needed. Skipping all kernel multi-app notification tests." $NUM_TEST_KERNEL
fi


for fct_test in ${TESTS[@]};
do
	TRACE_PATH=$(mktemp -d)

	${fct_test}
	if [ $? -ne 0 ]; then
		break;
	fi

	# Only delete if successful
	rm -rf $TRACE_PATH
done
Commit	Line	Data
	1	#!/bin/bash
	2	#
	3	# Copyright (C) - 2017 Jonathan Rajotte <jonathan.rajotte-julien@efficiso.com>>
	4	#
	5	# This library is free software; you can redistribute it and/or modify it under
	6	# the terms of the GNU Lesser General Public License as published by the Free
	7	# Software Foundation; version 2.1 of the License.
	8	#
	9	# This library is distributed in the hope that it will be useful, but WITHOUT
	10	# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
	11	# FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
	12	# details.
	13	#
	14	# You should have received a copy of the GNU Lesser General Public License
	15	# along with this library; if not, write to the Free Software Foundation, Inc.,
	16	# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
	17
	18	TEST_DESC="Notification"
	19
	20	CURDIR=$(dirname $0)/
	21	TESTDIR=$CURDIR/../../../
	22
	23	TESTPOINT=$(readlink -f ${CURDIR}/.libs/libpause_consumer.so)
	24
	25	TESTAPP_PATH="$TESTDIR/utils/testapp"
	26	TESTAPP_NAME="gen-ust-events"
	27	TESTAPP_BIN="$TESTAPP_PATH/$TESTAPP_NAME/$TESTAPP_NAME"
	28	TESTAPP_STATE_FILE="$(mktemp -u)"
	29
	30	NR_ITER=1000
	31	NR_USEC_WAIT=5
	32
	33	SESSION_NAME="my_session"
	34	CHANNEL_NAME="my_channel"
	35
	36
	37	DIR=$(readlink -f $TESTDIR)
	38
	39	PAGE_SIZE=$(getconf PAGE_SIZE)
	40
	41	NUM_TEST_UST=50
	42	NUM_TEST_KERNEL=50
	43	NUM_TESTS=$(($NUM_TEST_UST + $NUM_TEST_KERNEL))
	44
	45	source $TESTDIR/utils/utils.sh
	46
	47	consumerd_pipe=()
	48	file_sync_after_first_event=$(mktemp -u)
	49
	50	# MUST set TESTDIR before calling those functions
	51	plan_tests $NUM_TESTS
	52
	53	print_test_banner "$TEST_DESC"
	54
	55	app_pids=()
	56
	57	function kernel_event_generator_toogle_state
	58	{
	59	kernel_event_generator_suspended=$((kernel_event_generator_suspended==0))
	60
	61	}
	62	function kernel_event_generator
	63	{
	64	state_file=$1
	65	kernel_event_generator_suspended=0
	66	trap kernel_event_generator_toogle_state SIGUSR1
	67	trap "exit" SIGTERM SIGINT
	68	while (true); do
	69	if [[ $kernel_event_generator_suspended -eq "1" ]]; then
	70	touch $state_file
	71	sleep 0.5
	72	else
	73	if [[ -f $state_file ]]; then
	74	rm $state_file 2> /dev/null
	75	fi
	76	echo -n "1000" > /proc/lttng-test-filter-event
	77	fi
	78	done
	79	}
	80
	81	function ust_event_generator_toogle_state
	82	{
	83	ust_event_generator_suspended=$((ust_event_generator_suspended==0))
	84
	85	}
	86	function ust_event_generator
	87	{
	88	state_file=$1
	89	ust_event_generator_suspended=0
	90	trap ust_event_generator_toogle_state SIGUSR1
	91	trap "exit" SIGTERM SIGINT
	92	while (true); do
	93	if [[ $ust_event_generator_suspended -eq "1" ]]; then
	94	touch $state_file
	95	sleep 0.5
	96	else
	97	if [[ -f $state_file ]]; then
	98	rm $state_file 2> /dev/null
	99	fi
	100	taskset -c 0 $TESTAPP_BIN $NR_ITER $NR_USEC_WAIT > /dev/null 2>&1
	101	fi
	102	done
	103	}
	104
	105	function start_client {
	106	local pid=-1
	107	local output_file=$1
	108	local session_name=$2
	109	local channel_name=$3
	110	local domain_type=$4
	111	local buffer_usage_type=$5
	112	local buffer_usage_threshold_type=$6
	113	local buffer_usage_threshold_value=$7
	114	local nr_expected_notification=$8
	115
	116	${CURDIR}/base_client ${session_name} ${channel_name} ${domain_type} ${buffer_usage_type} ${buffer_usage_threshold_type} ${buffer_usage_threshold_value} ${nr_expected_notification} > ${output_file} &
	117	pid=$!
	118
	119	app_pids+=("$pid")
	120	}
	121
	122	function wait_for_message ()
	123	{
	124	local directory=$1
	125	local file_pattern=$2
	126	local message=$3
	127
	128	for file in $directory/${file_pattern}*; do
	129	while(true); do
	130	# Check for "error" message
	131	grep -q "error:" ${file}
	132	app_error=$?
	133	if [ $app_error -eq "0" ] ; then
	134	# An error occurred
	135	fail "Waiting message: error logged see file content: ${message}, ${file}"
	136	return 1
	137	fi
	138
	139	grep -q "${message}" ${file}
	140	if [[ "$?" -ne "0" ]]; then
	141	# Lookup failed restart loop
	142	diag "Lookup failed sleep and retry grep for: ${message}, ${file}"
	143	sleep 0.25
	144	continue
	145	fi
	146	break
	147	done
	148	done
	149	pass "Message received: ${message}"
	150	return 0
	151	}
	152
	153	function print_errors ()
	154	{
	155	local directory=$1
	156	local file_pattern=$2
	157
	158	for file in $directory/${file_pattern}*; do
	159	# Check for "error" message
	160	error_message=$(grep "error:" ${file})
	161	if [[ "${error_message}x" != "x" ]]; then
	162	diag "Errors for application ${file}:"
	163	diag "${error_message}"
	164	fi
	165	done
	166	}
	167
	168	function comm_consumerd ()
	169	{
	170	local message=$1
	171	local pipe=$2
	172	echo -ne "${message}" > "${pipe}"
	173	}
	174
	175	function stop_consumerd ()
	176	{
	177	local pipe=$1
	178	comm_consumerd "1" "$pipe"
	179	}
	180
	181	function resume_consumerd ()
	182	{
	183	local pipe=$1
	184	comm_consumerd "\0" "$pipe"
	185	}
	186
	187	function test_multi_app ()
	188	{
	189	local domain_type=$1
	190	local event_generator_pid=$2
	191
	192	local app_pids=()
	193	local low_output_file_pattern="low_app_output_file_"
	194	local high_output_file_pattern="high_app_output_file_"
	195	local output_dir=$(mktemp -d)
	196
	197	local testpoint_base_path=$(readlink -f "$output_dir/lttng.t_p_n_multi_app")
	198	local testpoint_pipe_path=$(mktemp -u "${testpoint_base_path}.XXXXXX")
	199
	200	local nr_notification_expected=5
	201	local nr_client_app=50
	202	local domain_string=""
	203	local event_name=""
	204
	205	case $domain_type in
	206	ust)
	207	domain_string=LTTNG_DOMAIN_UST
	208	event_name="tp:tptest"
	209	;;
	210	kernel)
	211	domain_string=LTTNG_DOMAIN_KERNEL
	212	event_name="lttng_test_filter_event"
	213	;;
	214	*)
	215	fail "Invalid domain type"
	216	exit 1
	217	;;
	218	esac
	219
	220	# Setup
	221	LTTNG_SESSIOND_ENV_VARS="LTTNG_TESTPOINT_ENABLE=1 CONSUMER_PAUSE_PIPE_PATH=${testpoint_pipe_path} LD_PRELOAD=${TESTPOINT}"
	222	start_lttng_sessiond
	223
	224	create_lttng_session_ok $SESSION_NAME $TRACE_PATH
	225	enable_${domain_type}_lttng_channel_ok $SESSION_NAME $CHANNEL_NAME --subbuf-size=$PAGE_SIZE
	226	enable_${domain_type}_lttng_event_ok $SESSION_NAME $event_name $CHANNEL_NAME
	227
	228	# Fetch consumerd testpoint pipe information
	229	# This is needed since the testpoint create a pipe with the consumer type suffixed
	230	consumerd_pipe=()
	231	for f in "$testpoint_pipe_path"*; do
	232	consumerd_pipe+=("$f")
	233	done
	234
	235	for (( i = 0; i < $nr_client_app; i++ )); do
	236	low_app_output_file=$output_dir/${low_output_file_pattern}${i}
	237	high_app_output_file=$output_dir/${high_output_file_pattern}${i}
	238	start_client $low_app_output_file $SESSION_NAME $CHANNEL_NAME $domain_string LOW RATIO 0.0 $nr_notification_expected
	239	start_client $high_app_output_file $SESSION_NAME $CHANNEL_NAME $domain_string HIGH RATIO 0.420 $nr_notification_expected
	240	done
	241
	242	wait_for_message $output_dir "${low_output_file_pattern}" "sync: ready"
	243	wait_for_message $output_dir "${high_output_file_pattern}" "sync: ready"
	244
	245	# Test notification reception
	246	for (( i = 0; i < $nr_notification_expected; i++ )); do
	247
	248	# Stop consumerd consumption to force high notification
	249	start_lttng_tracing_ok $SESSION_NAME
	250	for pipe in "${consumerd_pipe[@]}"; do
	251	stop_consumerd "${pipe}"
	252	done
	253
	254	wait_for_message $output_dir "${high_output_file_pattern}" "notification: high $i"
	255
	256	# Put application in suspend mode to prevent double low
	257	# notification and synchronize on state file.
	258	kill -s SIGUSR1 $event_generator_pid
	259	while [ ! -f "${TESTAPP_STATE_FILE}" ]; do
	260	sleep 0.5
	261	done
	262
	263	# Resume consumerd
	264	for pipe in "${consumerd_pipe[@]}"; do
	265	resume_consumerd "${pipe}"
	266	done
	267	# Stop tracing forcing full buffer consumption
	268	stop_lttng_tracing_ok $SESSION_NAME
	269
	270	# Check for notifications reception
	271	wait_for_message $output_dir "${low_output_file_pattern}" "notification: low $i"
	272	ret=$?
	273	ok $ret "Notifications $i received"
	274	if [[ $ret -ne "0" ]]; then
	275	# Error occurred bail out
	276	break;
	277	fi
	278
	279	# Put application in active mode and synchronize on state file.
	280	kill -s SIGUSR1 $event_generator_pid
	281	while [ -f "${TESTAPP_STATE_FILE}" ]; do
	282	sleep 0.5
	283	done
	284	done
	285
	286	wait_for_message $output_dir "${low_output_file_pattern}" "exit: 0"
	287	ret=$?
	288	ok $ret "Application for low notification terminated normally"
	289	if [[ $ret -ne "0" ]]; then
	290	print_errors $output_dir "${low_output_file_pattern}"
	291	fi
	292
	293	wait_for_message $output_dir "${high_output_file_pattern}" "exit: 0"
	294	ret=$?
	295	ok $ret "Application for high notification terminated normally"
	296	if [[ $ret -ne "0" ]]; then
	297	print_errors $output_dir "${high_output_file_pattern}"
	298	fi
	299
	300	rm -rf $output_dir
	301
	302	destroy_lttng_session_ok $SESSION_NAME
	303	stop_lttng_sessiond
	304
	305	for pipe in "${consumerd_pipe[@]}"; do
	306	rm -rf "${pipe}"
	307	done
	308	}
	309
	310	function test_multi_app_ust ()
	311	{
	312	diag "Multi client app UST notification"
	313	ust_event_generator $TESTAPP_STATE_FILE &
	314	local generator_pid=$!
	315
	316	test_multi_app ust $generator_pid
	317
	318	kill -s SIGTERM $generator_pid 2> /dev/null
	319	wait $generator_pid 2> /dev/null
	320	rm -rf ${TESTAPP_STATE_FILE} 2> /dev/null
	321	}
	322
	323	function test_multi_app_kernel ()
	324	{
	325	diag "Multi client app kernel notification"
	326	modprobe lttng-test
	327
	328	kernel_event_generator $TESTAPP_STATE_FILE &
	329	local generator_pid=$!
	330
	331	test_multi_app kernel $generator_pid
	332
	333
	334	kill -s SIGTERM $generator_pid 2> /dev/null
	335	wait $generator_pid 2> /dev/null
	336	rm -rf ${TESTAPP_STATE_FILE} 2> /dev/null
	337
	338	rmmod lttng-test
	339	}
	340
	341	function test_on_register_evaluation_ust ()
	342	{
	343	diag "On register notification UST"
	344
	345	# Start app in infinite loop
	346	ust_event_generator $TESTAPP_STATE_FILE &
	347	local generator_pid=$!
	348
	349	test_on_register_evaluation ust $generator_pid
	350
	351	kill -s SIGTERM $generator_pid 2> /dev/null
	352	wait $generator_pid 2> /dev/null
	353	rm -rf ${TESTAPP_STATE_FILE} 2> /dev/null
	354
	355	}
	356
	357	function test_on_register_evaluation_kernel()
	358	{
	359	diag "On register notification kernel"
	360
	361	modprobe lttng-test
	362
	363	kernel_event_generator $TESTAPP_STATE_FILE &
	364	local generator_pid=$!
	365
	366	test_on_register_evaluation kernel $generator_pid
	367
	368
	369	kill -s SIGTERM $generator_pid 2> /dev/null
	370	wait $generator_pid 2> /dev/null
	371	rm -rf ${TESTAPP_STATE_FILE} 2> /dev/null
	372
	373	rmmod lttng-test
	374	}
	375
	376	function test_on_register_evaluation ()
	377	{
	378	local domain_type=$1
	379	local event_generator_pid=$2
	380
	381	local app_pids=()
	382	local high_output_file_pattern="high_app_output_file_on_register_evaluation"
	383
	384	local output_dir=$(mktemp -d)
	385	local testpoint_base_path=$(readlink -f "$output_dir/lttng.t_p_n_register_evaluation")
	386	local testpoint_pipe_path=$(mktemp -u "${testpoint_base_path}.XXXXXX")
	387	local domain_string=""
	388	local event_name=""
	389
	390	case $domain_type in
	391	ust)
	392	domain_string=LTTNG_DOMAIN_UST
	393	event_name="tp:tptest"
	394	;;
	395	kernel)
	396	domain_string=LTTNG_DOMAIN_KERNEL
	397	event_name="lttng_test_filter_event"
	398	;;
	399	*)
	400	fail "Invalid domain type"
	401	exit 1
	402	;;
	403	esac
	404
	405	# Setup
	406	LTTNG_SESSIOND_ENV_VARS="LTTNG_TESTPOINT_ENABLE=1 CONSUMER_PAUSE_PIPE_PATH=${testpoint_pipe_path} LD_PRELOAD=${TESTPOINT}"
	407	start_lttng_sessiond
	408
	409	create_lttng_session_ok $SESSION_NAME $TRACE_PATH
	410	enable_${domain_type}_lttng_channel_ok $SESSION_NAME $CHANNEL_NAME --subbuf-size=$PAGE_SIZE
	411	enable_${domain_type}_lttng_event_ok $SESSION_NAME $event_name $CHANNEL_NAME
	412
	413	# Fetch consumerd testpoint pipe information
	414	# This is needed since the testpoint create a pipe with the consumer type suffixed
	415	consumerd_pipe=()
	416	for f in "$testpoint_pipe_path"*; do
	417	consumerd_pipe+=("$f")
	418	done
	419
	420	high_app_output_file=${high_output_file_pattern}.first_receiver
	421	high_app_output_path=$output_dir/${high_app_output_file}
	422	start_client $high_app_output_path $SESSION_NAME $CHANNEL_NAME $domain_string HIGH RATIO 0.420 1
	423
	424	wait_for_message $output_dir "${high_app_output_file}" "sync: ready"
	425
	426	# Stop consumerd consumption to force high notification
	427	start_lttng_tracing_ok $SESSION_NAME
	428
	429	for pipe in "${consumerd_pipe[@]}"; do
	430	stop_consumerd "${pipe}"
	431	done
	432
	433	wait_for_message $output_dir "${high_app_output_file}" "notification: high 0"
	434
	435	# Start a second receiver, the receiver should receive a high
	436	# notification on subscription
	437	high_app_output_file=${high_output_file_pattern}.second_receiver
	438	high_app_output_path=$output_dir/${high_app_output_file}
	439	start_client $high_app_output_path $SESSION_NAME $CHANNEL_NAME $domain_string HIGH RATIO 0.420 1
	440	wait_for_message $output_dir "${high_app_output_file}" "sync: ready"
	441	wait_for_message $output_dir "${high_app_output_file}" "notification: high 0"
	442
	443	# Resume consumerd
	444	for pipe in "${consumerd_pipe[@]}"; do
	445	resume_consumerd "${pipe}"
	446	done
	447
	448	wait_for_message $output_dir "${high_output_file_pattern}" "exit: 0"
	449	ret=$?
	450	ok $ret "Application for high notification terminated normally"
	451	if [[ $ret -ne "0" ]]; then
	452	# Keep the file
	453	print_errors "${high_output_file_pattern}"
	454	fi
	455
	456	rm -rf $output_dir
	457
	458	destroy_lttng_session_ok $SESSION_NAME
	459	stop_lttng_sessiond
	460
	461	kill -s SIGTERM $generator_pid 2> /dev/null
	462	wait $generator_pid 2> /dev/null
	463
	464	for pipe in "${consumerd_pipe[@]}"; do
	465	rm -rf "${pipe}"
	466	done
	467
	468	}
	469
	470
	471	TESTS=(
	472	test_multi_app_ust
	473	test_on_register_evaluation_ust
	474	)
	475
	476	if [ "$(id -u)" == "0" ]; then
	477	TESTS+=(
	478	test_multi_app_kernel
	479	test_on_register_evaluation_kernel
	480	)
	481	else
	482	skip 0 "Root access is needed. Skipping all kernel multi-app notification tests." $NUM_TEST_KERNEL
	483	fi
	484
	485
	486	for fct_test in ${TESTS[@]};
	487	do
	488	TRACE_PATH=$(mktemp -d)
	489
	490	${fct_test}
	491	if [ $? -ne 0 ]; then
	492	break;
	493	fi
	494
	495	# Only delete if successful
	496	rm -rf $TRACE_PATH
	497	done