X-Git-Url: https://git.lttng.org/?p=lttng-tools.git;a=blobdiff_plain;f=tests%2Futils%2Futils.sh;h=4ef4c72645b39294fada49b4eaf60c71efc91da4;hp=2647769f27106087ecf4f72e0c92d7590b652fa5;hb=38eb8a68a2817b040e31c577a9e3a81b52897816;hpb=8cfcd41c7fac2e14d8f8527238d928bd4ec732fb

diff --git a/tests/utils/utils.sh b/tests/utils/utils.sh
index 2647769f2..4ef4c7264 100644
--- a/tests/utils/utils.sh
+++ b/tests/utils/utils.sh
@@ -1,34 +1,115 @@
-#!/src/bin/bash
+# Copyright (C) 2012 David Goulet <dgoulet@efficios.com>
 #
-# Copyright (C) - 2012 David Goulet <dgoulet@efficios.com>
+# SPDX-License-Identifier: LGPL-2.1-only
 #
-# 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
 
 SESSIOND_BIN="lttng-sessiond"
+SESSIOND_MATCH=".*lttng-sess.*"
+RUNAS_BIN="lttng-runas"
+RUNAS_MATCH=".*lttng-runas.*"
 CONSUMERD_BIN="lttng-consumerd"
+CONSUMERD_MATCH=".*lttng-consumerd.*"
 RELAYD_BIN="lttng-relayd"
+RELAYD_MATCH=".*lttng-relayd.*"
 LTTNG_BIN="lttng"
 BABELTRACE_BIN="babeltrace"
-OUTPUT_DEST=/dev/null 2>&1
+OUTPUT_DEST=/dev/null
+ERROR_OUTPUT_DEST=/dev/null
 
 # Minimal kernel version supported for session daemon tests
 KERNEL_MAJOR_VERSION=2
 KERNEL_MINOR_VERSION=6
 KERNEL_PATCHLEVEL_VERSION=27
 
+# We set the default UST register timeout and network and app socket timeout to
+# "wait forever", so that basic tests don't have to worry about hitting
+# timeouts on busy systems. Specialized tests should test those corner-cases.
+export LTTNG_UST_REGISTER_TIMEOUT=-1
+export LTTNG_NETWORK_SOCKET_TIMEOUT=-1
+export LTTNG_APP_SOCKET_TIMEOUT=-1
+
+# We set the default lttng-sessiond path to /bin/true to prevent the spawning
+# of a daemonized sessiond. This is necessary since 'lttng create' will spawn
+# its own sessiond if none is running. It also ensures that 'lttng create'
+# fails when no sessiond is running.
+export LTTNG_SESSIOND_PATH="/bin/true"
+
 source $TESTDIR/utils/tap/tap.sh
 
+if [ -z ${LTTNG_TEST_TEARDOWN_TIMEOUT+x} ]; then
+	LTTNG_TEST_TEARDOWN_TIMEOUT=60
+fi
+
+function full_cleanup ()
+{
+	# Try to kill daemons gracefully
+	stop_lttng_relayd_notap SIGTERM $LTTNG_TEST_TEARDOWN_TIMEOUT
+	stop_lttng_sessiond_notap SIGTERM $LTTNG_TEST_TEARDOWN_TIMEOUT
+
+	# If daemons are still present, forcibly kill them
+	stop_lttng_relayd_notap SIGKILL $LTTNG_TEST_TEARDOWN_TIMEOUT
+	stop_lttng_sessiond_notap SIGKILL $LTTNG_TEST_TEARDOWN_TIMEOUT
+	stop_lttng_consumerd_notap SIGKILL $LTTNG_TEST_TEARDOWN_TIMEOUT
+
+	# Disable trap for SIGTERM since the following kill to the
+	# pidgroup will be SIGTERM. Otherwise it loops.
+	# The '-' before the pid number ($$) indicates 'kill' to signal the
+	# whole process group.
+	trap - SIGTERM && kill -- -$$
+	exit 1
+}
+
+function null_pipes ()
+{
+	exec 0>/dev/null
+	exec 1>/dev/null
+	exec 2>/dev/null
+}
+
+trap full_cleanup SIGINT SIGTERM
+
+# perl prove closes its child pipes before giving it a chance to run its
+# signal trap handlers. Redirect pipes to /dev/null if SIGPIPE is caught
+# to allow those trap handlers to proceed.
+
+trap null_pipes SIGPIPE
+
+# Check pgrep from env, default to pgrep if none
+if [ -z "$PGREP" ]; then
+	PGREP=pgrep
+fi
+
+# Due to the renaming of threads we need to use the full command (pgrep -f) to
+# identify the pids for multiple lttng related processes. The problem with "pgrep
+# -f" is that it ends up also looking at the arguments. We use a two stage
+# lookup. The first one is using "pgrep -f" yielding potential candidate.
+# The second on perform grep on the basename of the first field of the
+# /proc/pid/cmdline of the previously identified pids. The first field
+# correspond to the actual command.
+function lttng_pgrep ()
+{
+	local pattern=$1
+	local possible_pids
+	local full_command_no_argument
+	local command_basename
+
+	possible_pids=$($PGREP -f "$pattern")
+	if [ -z "$possible_pids" ]; then
+		return 0
+	fi
+
+	while IFS= read -r pid ; do
+		# /proc/pid/cmdline is null separated.
+		if full_command_no_argument=$(cut -d '' -f 1 2>/dev/null < /proc/"$pid"/cmdline); then
+			command_basename=$(basename "$full_command_no_argument")
+			if grep -q "$pattern" <<< "$command_basename"; then
+				echo "$pid"
+			fi
+		fi
+	done <<< "$possible_pids"
+	return 0
+}
+
 function print_ok ()
 {
 	# Check if we are a terminal
@@ -76,30 +157,93 @@ function validate_kernel_version ()
 function randstring()
 {
 	[ "$2" == "0" ] && CHAR="[:alnum:]" || CHAR="[:graph:]"
-	cat /dev/urandom | tr -cd "$CHAR" | head -c ${1:-16}
+	cat /dev/urandom 2>/dev/null | tr -cd "$CHAR" 2>/dev/null | head -c ${1:-16} 2>/dev/null
 	echo
 }
 
-function lttng_enable_kernel_event
+# Return the number of _configured_ CPUs.
+function conf_proc_count()
 {
-	local sess_name=$1
-	local event_name=$2
-	local channel_name=$3
+	getconf _NPROCESSORS_CONF
+	if [ $? -ne 0 ]; then
+		diag "Failed to get the number of configured CPUs"
+	fi
+	echo
+}
+
+# Check if base lttng-modules are present.
+# Bail out on failure
+function validate_lttng_modules_present ()
+{
+	# Check for loadable modules.
+	modprobe -n lttng-tracer 2>/dev/null
+	if [ $? -eq 0 ]; then
+		return 0
+	fi
+
+	# Check for builtin modules.
+	ls /proc/lttng > /dev/null 2>&1
+	if [ $? -eq 0 ]; then
+		return 0
+	fi
+
+	BAIL_OUT "LTTng modules not detected."
+}
+
+function enable_kernel_lttng_event
+{
+	local withtap="$1"
+	local expected_to_fail="$2"
+	local sess_name="$3"
+	local event_name="$4"
+	local channel_name="$5"
 
-	if [ -z $event_name ]; then
+	if [ -z "$event_name" ]; then
 		# Enable all event if no event name specified
 		event_name="-a"
 	fi
 
-	if [ -z $channel_name ]; then
+	if [ -z "$channel_name" ]; then
 		# default channel if none specified
 		chan=""
 	else
 		chan="-c $channel_name"
 	fi
 
-	$TESTDIR/../src/bin/lttng/$LTTNG_BIN enable-event "$event_name" $chan -s $sess_name -k >$OUTPUT_DEST
-	ok $? "Enable kernel event $event_name for session $sess_name"
+	$TESTDIR/../src/bin/lttng/$LTTNG_BIN enable-event "$event_name" $chan -s $sess_name -k 1> $OUTPUT_DEST 2> $ERROR_OUTPUT_DEST
+	ret=$?
+	if [[ $expected_to_fail -eq "1" ]]; then
+		test $ret -ne "0"
+		ret=$?
+		if [ $withtap -eq "1" ]; then
+			ok $ret "Enable kernel event $event_name for session $session_name on channel $channel_name failed as expected"
+		fi
+	else
+		if [ $withtap -eq "1" ]; then
+			ok $ret "Enable kernel event $event_name for session $sess_name"
+		fi
+	fi
+}
+
+function enable_kernel_lttng_event_ok ()
+{
+	enable_kernel_lttng_event 1 0 "$@"
+}
+
+function enable_kernel_lttng_event_fail ()
+{
+	enable_kernel_lttng_event 1 1 "$@"
+}
+
+function enable_kernel_lttng_event_notap ()
+{
+	enable_kernel_lttng_event 0 0 "$@"
+}
+
+# Old interface
+function lttng_enable_kernel_event
+{
+	enable_kernel_lttng_event_ok "$@"
 }
 
 function lttng_enable_kernel_syscall()
@@ -121,7 +265,7 @@ function lttng_enable_kernel_syscall()
 		chan="-c $channel_name"
 	fi
 
-	$TESTDIR/../src/bin/lttng/$LTTNG_BIN enable-event --syscall "$syscall_name" $chan -s $sess_name -k >$OUTPUT_DEST
+	$TESTDIR/../src/bin/lttng/$LTTNG_BIN enable-event --syscall "$syscall_name" $chan -s $sess_name -k 1> $OUTPUT_DEST 2> $ERROR_OUTPUT_DEST
 	ret=$?
 	if [[ $expected_to_fail -eq "1" ]]; then
 		test $ret -ne "0"
@@ -133,12 +277,12 @@ function lttng_enable_kernel_syscall()
 
 function lttng_enable_kernel_syscall_ok()
 {
-	lttng_enable_kernel_syscall 0 ${*}
+	lttng_enable_kernel_syscall 0 "$@"
 }
 
 function lttng_enable_kernel_syscall_fail()
 {
-	lttng_enable_kernel_syscall 1 ${*}
+	lttng_enable_kernel_syscall 1 "$@"
 }
 
 function lttng_disable_kernel_syscall()
@@ -160,12 +304,12 @@ function lttng_disable_kernel_syscall()
 		chan="-c $channel_name"
 	fi
 
-	$TESTDIR/../src/bin/lttng/$LTTNG_BIN disable-event --syscall "$syscall_name" $chan -s $sess_name -k >$OUTPUT_DEST
+	$TESTDIR/../src/bin/lttng/$LTTNG_BIN disable-event --syscall "$syscall_name" $chan -s $sess_name -k 1> $OUTPUT_DEST 2> $ERROR_OUTPUT_DEST
 
 	ret=$?
 	if [[ $expected_to_fail -eq "1" ]]; then
 		test $ret -ne "0"
-		ok $? "Disable kernel syscall $syscall_name for session $sess_name on channel $channel_name fail as expected"
+		ok $? "Disable kernel syscall $syscall_name for session $sess_name on channel $channel_name failed as expected"
 	else
 		ok $ret "Disable kernel syscall $syscall_name for session $sess_name on channel $channel_name"
 	fi
@@ -173,223 +317,819 @@ function lttng_disable_kernel_syscall()
 
 function lttng_disable_kernel_syscall_ok()
 {
-	lttng_disable_kernel_syscall 0 ${*}
+	lttng_disable_kernel_syscall 0 "$@"
 }
 
 function lttng_disable_kernel_syscall_fail()
 {
-	lttng_disable_kernel_syscall 1 ${*}
+	lttng_disable_kernel_syscall 1 "$@"
+}
+
+function lttng_enable_kernel_function_event ()
+{
+	local expected_to_fail="$1"
+	local sess_name="$2"
+	local target="$3"
+	local event_name="$4"
+
+	"$TESTDIR/../src/bin/lttng/$LTTNG_BIN" enable-event --kernel --function="$target" "$event_name" -s "$sess_name" > "$OUTPUT_DEST" 2> "$ERROR_OUTPUT_DEST"
+	ret=$?
+	if [[ $expected_to_fail -eq "1" ]]; then
+		test $ret -ne "0"
+		ok $? "Enable kernel function event for session $sess_name failed as expected"
+	else
+		ok $ret "Enable kernel function event for session $sess_name"
+	fi
+}
+
+function lttng_enable_kernel_function_event_ok ()
+{
+	lttng_enable_kernel_function_event 0 "$@"
+}
+
+function lttng_enable_kernel_userspace_probe_event ()
+{
+	local expected_to_fail="$1"
+	local sess_name="$2"
+	local target="$3"
+	local event_name="$4"
+
+	"$TESTDIR/../src/bin/lttng/$LTTNG_BIN" enable-event --kernel --userspace-probe="$target" "$event_name" -s "$sess_name" > "$OUTPUT_DEST" 2> "$ERROR_OUTPUT_DEST"
+	ret=$?
+	if [[ $expected_to_fail -eq "1" ]]; then
+		test $ret -ne "0"
+		ok $? "Enable kernel userspace probe event for session $sess_name failed as expected"
+	else
+		ok $ret "Enable kernel userspace probe event for session $sess_name"
+	fi
+}
+
+function lttng_enable_kernel_userspace_probe_event_fail ()
+{
+	lttng_enable_kernel_userspace_probe_event 1 "$@"
+}
+
+function lttng_enable_kernel_userspace_probe_event_ok ()
+{
+	lttng_enable_kernel_userspace_probe_event 0 "$@"
+}
+
+function disable_kernel_lttng_userspace_probe_event_ok ()
+{
+	local sess_name="$1"
+	local event_name="$2"
+
+	"$TESTDIR/../src/bin/lttng/$LTTNG_BIN" disable-event --kernel "$event_name" -s "$sess_name" > "$OUTPUT_DEST" 2> "$ERROR_OUTPUT_DEST"
+	ok $? "Disable kernel event $target for session $sess_name"
+}
+function lttng_enable_kernel_channel()
+{
+	local withtap=$1
+	local expected_to_fail=$2
+	local sess_name=$3
+	local channel_name=$4
+	local opts="${@:5}"
+
+	$TESTDIR/../src/bin/lttng/$LTTNG_BIN enable-channel -k $channel_name -s $sess_name $opts 1> $OUTPUT_DEST 2> $ERROR_OUTPUT_DEST
+	ret=$?
+	if [[ $expected_to_fail -eq "1" ]]; then
+		test "$ret" -ne "0"
+		ret=$?
+		if [ $withtap -eq "1" ]; then
+			ok $ret "Enable channel $channel_name for session $sess_name failed as expected"
+		fi
+	else
+		if [ $withtap -eq "1" ]; then
+			ok $ret "Enable channel $channel_name for session $sess_name"
+		fi
+	fi
+}
+
+function lttng_enable_kernel_channel_ok()
+{
+	lttng_enable_kernel_channel 1 0 "$@"
+}
+
+function lttng_enable_kernel_channel_fail()
+{
+	lttng_enable_kernel_channel 1 1 "$@"
+}
+
+function lttng_enable_kernel_channel_notap()
+{
+	lttng_enable_kernel_channel 0 0 "$@"
+}
+
+function enable_kernel_lttng_channel_ok()
+{
+	lttng_enable_kernel_channel 1 0 "$@"
+}
+
+function lttng_disable_kernel_channel()
+{
+	local expected_to_fail=$1
+	local sess_name=$2
+	local channel_name=$3
+
+	$TESTDIR/../src/bin/lttng/$LTTNG_BIN disable-channel -k $channel_name -s $sess_name 1> $OUTPUT_DEST 2> $ERROR_OUTPUT_DEST
+	ret=$?
+	if [[ $expected_to_fail -eq "1" ]]; then
+		test "$ret" -ne "0"
+		ok $? "Disable channel $channel_name for session $sess_name failed as expected"
+	else
+		ok $ret "Disable channel $channel_name for session $sess_name"
+	fi
+}
+
+function lttng_disable_kernel_channel_ok()
+{
+	lttng_disable_kernel_channel 0 "$@"
+}
+
+function lttng_disable_kernel_channel_fail()
+{
+	lttng_disable_kernel_channel 1 "$@"
 }
 
-function start_lttng_relayd
+function start_lttng_relayd_opt()
 {
-	local opt=$1
+	local withtap=$1
+	local process_mode=$2
+	local opt=$3
 
-	DIR=$(readlink -f $TESTDIR)
+	DIR=$(readlink -f "$TESTDIR")
 
-	if [ -z $(pidof lt-$RELAYD_BIN) ]; then
-		$DIR/../src/bin/lttng-relayd/$RELAYD_BIN -b $opt >$OUTPUT_DEST
+	if [ -z $(lttng_pgrep "$RELAYD_MATCH") ]; then
+		# shellcheck disable=SC2086
+		$DIR/../src/bin/lttng-relayd/$RELAYD_BIN $process_mode $opt 1> $OUTPUT_DEST 2> $ERROR_OUTPUT_DEST
 		#$DIR/../src/bin/lttng-relayd/$RELAYD_BIN $opt -vvv >>/tmp/relayd.log 2>&1 &
 		if [ $? -eq 1 ]; then
-			fail "Start lttng-relayd (opt: $opt)"
+			if [ $withtap -eq "1" ]; then
+				fail "Start lttng-relayd (process mode: $process_mode opt: $opt)"
+			fi
 			return 1
 		else
-			pass "Start lttng-relayd (opt: $opt)"
+			if [ $withtap -eq "1" ]; then
+				pass "Start lttng-relayd (process mode: $process_mode opt: $opt)"
+			fi
 		fi
 	else
 		pass "Start lttng-relayd (opt: $opt)"
 	fi
 }
 
-function stop_lttng_relayd_nocheck
+function start_lttng_relayd()
 {
-	PID_RELAYD=`pidof lt-$RELAYD_BIN`
+	start_lttng_relayd_opt 1 "-b" "$@"
+}
 
-	diag "Killing lttng-relayd (pid: $PID_RELAYD)"
-	kill $PID_RELAYD >$OUTPUT_DEST
-	retval=$?
+function start_lttng_relayd_notap()
+{
+	start_lttng_relayd_opt 0 "-b" "$@"
+}
 
-	if [ $retval -eq 1 ]; then
+function stop_lttng_relayd_opt()
+{
+	local withtap=$1
+	local signal=$2
+
+	if [ -z "$signal" ]; then
+		signal="SIGTERM"
+	fi
+
+	local timeout_s=$3
+	local dtimeleft_s=
+
+	# Multiply time by 2 to simplify integer arithmetic
+	if [ -n "$timeout_s" ]; then
+		dtimeleft_s=$((timeout_s * 2))
+	fi
+
+	local retval=0
+	local pids=
+
+	pids=$(lttng_pgrep "$RELAYD_MATCH")
+	if [ -z "$pids" ]; then
+		if [ "$withtap" -eq "1" ]; then
+			pass "No relay daemon to kill"
+		fi
+		return 0
+	fi
+
+	diag "Killing (signal $signal) lttng-relayd (pid: $pids)"
+
+	# shellcheck disable=SC2086
+	if ! kill -s $signal $pids 1> $OUTPUT_DEST 2> $ERROR_OUTPUT_DEST; then
+		retval=1
+		if [ "$withtap" -eq "1" ]; then
+			fail "Kill relay daemon"
+		fi
+	else
 		out=1
 		while [ -n "$out" ]; do
-			out=$(pidof lt-$RELAYD_BIN)
+			out=$(lttng_pgrep "$RELAYD_MATCH")
+			if [ -n "$dtimeleft_s" ]; then
+				if [ $dtimeleft_s -lt 0 ]; then
+					out=
+					retval=1
+				fi
+				dtimeleft_s=$((dtimeleft_s - 1))
+			fi
 			sleep 0.5
 		done
+		if [ "$withtap" -eq "1" ]; then
+			if [ "$retval" -eq "0" ]; then
+				pass "Wait after kill relay daemon"
+			else
+				fail "Wait after kill relay daemon"
+			fi
+		fi
 	fi
 	return $retval
 }
 
-function stop_lttng_relayd
+function stop_lttng_relayd()
 {
-	stop_lttng_relayd_nocheck
+	stop_lttng_relayd_opt 1 "$@"
+}
 
-	if [ $? -eq 1 ]; then
-		fail "Killed lttng-relayd (pid: $PID_RELAYD)"
-		return 1
-	else
-		pass "Killed lttng-relayd (pid: $PID_RELAYD)"
-		return 0
-	fi
+function stop_lttng_relayd_notap()
+{
+	stop_lttng_relayd_opt 0 "$@"
 }
 
-#First argument: load path for automatic loading
-function start_lttng_sessiond()
+#First arg: show tap output
+#Second argument: load path for automatic loading
+function start_lttng_sessiond_opt()
 {
+	local withtap=$1
+	local load_path=$2
+
+	# The rest of the arguments will be passed directly to lttng-sessiond.
+	shift 2
+
+	local env_vars=""
+	local consumerd=""
+
+	local long_bit_value=
+	long_bit_value=$(getconf LONG_BIT)
 
-	local load_path="$1"
-	if [ -n $TEST_NO_SESSIOND ] && [ "$TEST_NO_SESSIOND" == "1" ]; then
+	if [ -n "$TEST_NO_SESSIOND" ] && [ "$TEST_NO_SESSIOND" == "1" ]; then
 		# Env variable requested no session daemon
 		return
 	fi
 
-	validate_kernel_version
-	if [ $? -ne 0 ]; then
+	DIR=$(readlink -f "$TESTDIR")
+
+	# Get long_bit value for 32/64 consumerd
+	case "$long_bit_value" in
+		32)
+			consumerd="--consumerd32-path=$DIR/../src/bin/lttng-consumerd/lttng-consumerd"
+			;;
+		64)
+			consumerd="--consumerd64-path=$DIR/../src/bin/lttng-consumerd/lttng-consumerd"
+			;;
+		*)
+			return
+			;;
+	esac
+
+	# Check for env. variable. Allow the use of LD_PRELOAD etc.
+	if [[ "x${LTTNG_SESSIOND_ENV_VARS}" != "x" ]]; then
+		env_vars="${LTTNG_SESSIOND_ENV_VARS} "
+	fi
+	env_vars="${env_vars}$DIR/../src/bin/lttng-sessiond/$SESSIOND_BIN"
+
+	if ! validate_kernel_version; then
 	    fail "Start session daemon"
 	    BAIL_OUT "*** Kernel too old for session daemon tests ***"
 	fi
 
-	DIR=$(readlink -f $TESTDIR)
-	: ${LTTNG_SESSION_CONFIG_XSD_PATH=${DIR}/../src/common/config/}
+	: "${LTTNG_SESSION_CONFIG_XSD_PATH="${DIR}/../src/common/config/"}"
 	export LTTNG_SESSION_CONFIG_XSD_PATH
 
-	if [ -z $(pidof lt-$SESSIOND_BIN) ]; then
+	if [ -z "$(lttng_pgrep "${SESSIOND_MATCH}")" ]; then
 		# Have a load path ?
-		if [ -n "$1" ]; then
-			$DIR/../src/bin/lttng-sessiond/$SESSIOND_BIN --load "$1" --background --consumerd32-path="$DIR/../src/bin/lttng-consumerd/lttng-consumerd" --consumerd64-path="$DIR/../src/bin/lttng-consumerd/lttng-consumerd"
+		if [ -n "$load_path" ]; then
+			# shellcheck disable=SC2086
+			env $env_vars --load "$load_path" --background "$consumerd" "$@"
 		else
-			$DIR/../src/bin/lttng-sessiond/$SESSIOND_BIN --background --consumerd32-path="$DIR/../src/bin/lttng-consumerd/lttng-consumerd" --consumerd64-path="$DIR/../src/bin/lttng-consumerd/lttng-consumerd"
+			# shellcheck disable=SC2086
+			env $env_vars --background "$consumerd" "$@"
 		fi
-		#$DIR/../src/bin/lttng-sessiond/$SESSIOND_BIN --consumerd32-path="$DIR/../src/bin/lttng-consumerd/lttng-consumerd" --consumerd64-path="$DIR/../src/bin/lttng-consumerd/lttng-consumerd" --verbose-consumer >>/tmp/sessiond.log 2>&1 &
+		#$DIR/../src/bin/lttng-sessiond/$SESSIOND_BIN --background --consumerd32-path="$DIR/../src/bin/lttng-consumerd/lttng-consumerd" --consumerd64-path="$DIR/../src/bin/lttng-consumerd/lttng-consumerd" --verbose-consumer >>/tmp/sessiond.log 2>&1
 		status=$?
-		ok $status "Start session daemon"
+		if [ "$withtap" -eq "1" ]; then
+			ok $status "Start session daemon"
+		fi
 	fi
 }
 
-function stop_lttng_sessiond ()
+function start_lttng_sessiond()
+{
+	start_lttng_sessiond_opt 1 "$@"
+}
+
+function start_lttng_sessiond_notap()
 {
-	if [ -n $TEST_NO_SESSIOND ] && [ "$TEST_NO_SESSIOND" == "1" ]; then
+	start_lttng_sessiond_opt 0 "$@"
+}
+
+function stop_lttng_sessiond_opt()
+{
+	local withtap=$1
+	local signal=$2
+
+	if [ -z "$signal" ]; then
+		signal=SIGTERM
+	fi
+
+	local timeout_s=$3
+	local dtimeleft_s=
+
+	# Multiply time by 2 to simplify integer arithmetic
+	if [ -n "$timeout_s" ]; then
+		dtimeleft_s=$((timeout_s * 2))
+	fi
+
+	if [ -n "$TEST_NO_SESSIOND" ] && [ "$TEST_NO_SESSIOND" == "1" ]; then
 		# Env variable requested no session daemon
-		return
+		return 0
 	fi
 
-	PID_SESSIOND=`pidof lt-$SESSIOND_BIN`
+	local retval=0
 
-	kill $PID_SESSIOND >$OUTPUT_DEST
+	local runas_pids=
+	runas_pids=$(lttng_pgrep "$RUNAS_MATCH")
 
-	if [ $? -eq 1 ]; then
-		fail "Kill sessions daemon"
-		return 1
+	local pids=
+	pids=$(lttng_pgrep "$SESSIOND_MATCH")
+
+	if [ -n "$runas_pids" ]; then
+		pids="$pids $runas_pids"
+	fi
+
+	if [ -z "$pids" ]; then
+		if [ "$withtap" -eq "1" ]; then
+			fail "No session daemon to kill"
+		else
+			BAIL_OUT "No session daemon to kill"
+		fi
+		return 0
+	fi
+
+	diag "Killing (signal $signal) $SESSIOND_BIN and lt-$SESSIOND_BIN pids: $(echo "$pids" | tr '\n' ' ')"
+
+	# shellcheck disable=SC2086
+	if ! kill -s $signal $pids 1> $OUTPUT_DEST 2> $ERROR_OUTPUT_DEST; then
+		retval=1
+		if [ "$withtap" -eq "1" ]; then
+			fail "Kill sessions daemon"
+		fi
 	else
 		out=1
 		while [ -n "$out" ]; do
-			out=$(pidof lt-$SESSIOND_BIN)
+			out=$(lttng_pgrep "${SESSIOND_MATCH}")
+			if [ -n "$dtimeleft_s" ]; then
+				if [ $dtimeleft_s -lt 0 ]; then
+					out=
+					retval=1
+				fi
+				dtimeleft_s=$((dtimeleft_s - 1))
+			fi
 			sleep 0.5
 		done
 		out=1
 		while [ -n "$out" ]; do
-			out=$(pidof $CONSUMERD_BIN)
+			out=$(lttng_pgrep "$CONSUMERD_MATCH")
+			if [ -n "$dtimeleft_s" ]; then
+				if [ $dtimeleft_s -lt 0 ]; then
+					out=
+					retval=1
+				fi
+				dtimeleft_s=$((dtimeleft_s - 1))
+			fi
 			sleep 0.5
 		done
-		pass "Kill session daemon"
+
+		if [ "$withtap" -eq "1" ]; then
+			if [ "$retval" -eq "0" ]; then
+				pass "Wait after kill session daemon"
+			else
+				fail "Wait after kill session daemon"
+			fi
+		fi
 	fi
+	if [ "$signal" = "SIGKILL" ]; then
+		if [ "$(id -u)" -eq "0" ]; then
+			local modules=
+			modules="$(lsmod | grep ^lttng | awk '{print $1}')"
+
+			if [ -n "$modules" ]; then
+				diag "Unloading all LTTng modules"
+				modprobe --remove "$modules"
+			fi
+		fi
+	fi
+
+	return $retval
 }
 
-function list_lttng_with_opts ()
+function stop_lttng_sessiond()
 {
-	local opts=$1
-	$TESTDIR/../src/bin/lttng/$LTTNG_BIN list $opts >$OUTPUT_DEST
-	ok $? "Lttng-tool list command with option $opts"
+	stop_lttng_sessiond_opt 1 "$@"
 }
 
-function create_lttng_session_no_output ()
+function stop_lttng_sessiond_notap()
 {
-	local sess_name=$1
-
-	$TESTDIR/../src/bin/lttng/$LTTNG_BIN create $sess_name --no-output >$OUTPUT_DEST
-	ok $? "Create session $sess_name in no-output mode"
+	stop_lttng_sessiond_opt 0 "$@"
 }
 
-function create_lttng_session ()
+function sigstop_lttng_sessiond_opt()
 {
-	local sess_name=$1
-	local trace_path=$2
-	local expected_to_fail=$3
+	local withtap=$1
+	local signal=SIGSTOP
 
-	$TESTDIR/../src/bin/lttng/$LTTNG_BIN create $sess_name -o $trace_path > $OUTPUT_DEST
-	ret=$?
-	if [[ $expected_to_fail ]]; then
-		test "$ret" -ne "0"
-		ok $? "Expected fail on session creation $sess_name in $trace_path"
-	else
-		ok $ret "Create session $sess_name in $trace_path"
+	if [ -n "$TEST_NO_SESSIOND" ] && [ "$TEST_NO_SESSIOND" == "1" ]; then
+		# Env variable requested no session daemon
+		return
 	fi
-}
 
-function enable_ust_lttng_channel()
-{
-	local sess_name=$1
-	local channel_name=$2
-	local expect_fail=$3
+	PID_SESSIOND="$(lttng_pgrep "${SESSIOND_MATCH}") $(lttng_pgrep "$RUNAS_MATCH")"
 
-	$TESTDIR/../src/bin/lttng/$LTTNG_BIN enable-channel -u $channel_name -s $sess_name >$OUTPUT_DEST
-	ret=$?
-	if [[ $expect_fail ]]; then
-		test "$ret" -ne "0"
-		ok $? "Expected fail on ust channel creation $channel_name in $sess_name"
+	if [ "$withtap" -eq "1" ]; then
+		diag "Sending SIGSTOP to lt-$SESSIOND_BIN and $SESSIOND_BIN pids: $(echo "$PID_SESSIOND" | tr '\n' ' ')"
+	fi
+
+	# shellcheck disable=SC2086
+	if ! kill -s $signal $PID_SESSIOND 1> $OUTPUT_DEST 2> $ERROR_OUTPUT_DEST; then
+		if [ "$withtap" -eq "1" ]; then
+			fail "Sending SIGSTOP to session daemon"
+		fi
 	else
-		ok $ret "Enable channel $channel_name for session $sess_name"
+		out=1
+		while [ $out -ne 0 ]; do
+			pid="$(lttng_pgrep "$SESSIOND_MATCH")"
+
+			# Wait until state becomes stopped for session
+			# daemon(s).
+			out=0
+			for sessiond_pid in $pid; do
+				state="$(ps -p "$sessiond_pid" -o state= )"
+				if [[ -n "$state" && "$state" != "T" ]]; then
+					out=1
+				fi
+			done
+			sleep 0.5
+		done
+		if [ "$withtap" -eq "1" ]; then
+			pass "Sending SIGSTOP to session daemon"
+		fi
 	fi
 }
 
-function disable_ust_lttng_channel()
+function sigstop_lttng_sessiond()
 {
-	local sess_name=$1
-	local channel_name=$2
-
-	$TESTDIR/../src/bin/lttng/$LTTNG_BIN disable-channel -u $channel_name -s $sess_name >$OUTPUT_DEST
-	ok $? "Disable channel $channel_name for session $sess_name"
+	sigstop_lttng_sessiond_opt 1 "$@"
 }
 
-function enable_lttng_mmap_overwrite_kernel_channel()
+function sigstop_lttng_sessiond_notap()
 {
-	local sess_name=$1
-	local channel_name=$2
-
-	$TESTDIR/../src/bin/lttng/$LTTNG_BIN enable-channel -s $sess_name $channel_name -k --output mmap --overwrite >$OUTPUT_DEST
-	ok $? "Enable channel $channel_name for session $sess_name"
+	sigstop_lttng_sessiond_opt 0 "$@"
 }
 
-function enable_lttng_mmap_overwrite_ust_channel()
+function stop_lttng_consumerd_opt()
 {
-	local sess_name=$1
-	local channel_name=$2
+	local withtap=$1
+	local signal=$2
 
-	$TESTDIR/../src/bin/lttng/$LTTNG_BIN enable-channel -s $sess_name $channel_name -u --output mmap --overwrite >$OUTPUT_DEST
-	ok $? "Enable channel $channel_name for session $sess_name"
-}
+	if [ -z "$signal" ]; then
+		signal=SIGTERM
+	fi
 
-function enable_ust_lttng_event ()
-{
-	local sess_name=$1
-	local event_name="$2"
-	local channel_name=$3
-	local expected_to_fail=$4
+	local timeout_s=$3
+	local dtimeleft_s=
 
-	if [ -z $channel_name ]; then
-		# default channel if none specified
-		chan=""
+	# Multiply time by 2 to simplify integer arithmetic
+	if [ -n "$timeout_s" ]; then
+		dtimeleft_s=$((timeout_s * 2))
+	fi
+
+	local retval=0
+
+	PID_CONSUMERD="$(lttng_pgrep "$CONSUMERD_MATCH")"
+
+	if [ -z "$PID_CONSUMERD" ]; then
+		if [ "$withtap" -eq "1" ]; then
+			pass "No consumer daemon to kill"
+		fi
+		return 0
+	fi
+
+	diag "Killing (signal $signal) $CONSUMERD_BIN pids: $(echo "$PID_CONSUMERD" | tr '\n' ' ')"
+
+	# shellcheck disable=SC2086
+	if ! kill -s $signal $PID_CONSUMERD 1> $OUTPUT_DEST 2> $ERROR_OUTPUT_DEST; then
+		retval=1
+		if [ "$withtap" -eq "1" ]; then
+			fail "Kill consumer daemon"
+		fi
+	else
+		out=1
+		while [ $out -ne 0 ]; do
+			pid="$(lttng_pgrep "$CONSUMERD_MATCH")"
+
+			# If consumerds are still present check their status.
+			# A zombie status qualifies the consumerd as *killed*
+			out=0
+			for consumer_pid in $pid; do
+				state="$(ps -p "$consumer_pid" -o state= )"
+				if [[ -n "$state" && "$state" != "Z" ]]; then
+					out=1
+				fi
+			done
+			if [ -n "$dtimeleft_s" ]; then
+				if [ $dtimeleft_s -lt 0 ]; then
+					out=0
+					retval=1
+				fi
+				dtimeleft_s=$((dtimeleft_s - 1))
+			fi
+			sleep 0.5
+		done
+		if [ "$withtap" -eq "1" ]; then
+			if [ "$retval" -eq "0" ]; then
+				pass "Wait after kill consumer daemon"
+			else
+				fail "Wait after kill consumer daemon"
+			fi
+		fi
+	fi
+
+	return $retval
+}
+
+function stop_lttng_consumerd()
+{
+	stop_lttng_consumerd_opt 1 "$@"
+}
+
+function stop_lttng_consumerd_notap()
+{
+	stop_lttng_consumerd_opt 0 "$@"
+}
+
+function sigstop_lttng_consumerd_opt()
+{
+	local withtap=$1
+	local signal=SIGSTOP
+
+	PID_CONSUMERD="$(lttng_pgrep "$CONSUMERD_MATCH")"
+
+	diag "Sending SIGSTOP to $CONSUMERD_BIN pids: $(echo "$PID_CONSUMERD" | tr '\n' ' ')"
+
+	# shellcheck disable=SC2086
+	kill -s $signal $PID_CONSUMERD 1> $OUTPUT_DEST 2> $ERROR_OUTPUT_DEST
+	retval=$?
+
+	if [ $retval -eq 1 ]; then
+		if [ "$withtap" -eq "1" ]; then
+			fail "Sending SIGSTOP to consumer daemon"
+		fi
+		return 1
+	else
+		out=1
+		while [ $out -ne 0 ]; do
+			pid="$(lttng_pgrep "$CONSUMERD_MATCH")"
+
+			# Wait until state becomes stopped for all
+			# consumers.
+			out=0
+			for consumer_pid in $pid; do
+				state="$(ps -p "$consumer_pid" -o state= )"
+				if [[ -n "$state" && "$state" != "T" ]]; then
+					out=1
+				fi
+			done
+			sleep 0.5
+		done
+		if [ "$withtap" -eq "1" ]; then
+			pass "Sending SIGSTOP to consumer daemon"
+		fi
+	fi
+	return $retval
+}
+
+function sigstop_lttng_consumerd()
+{
+	sigstop_lttng_consumerd_opt 1 "$@"
+}
+
+function sigstop_lttng_consumerd_notap()
+{
+	sigstop_lttng_consumerd_opt 0 "$@"
+}
+
+function list_lttng_with_opts ()
+{
+	local opts=$1
+	$TESTDIR/../src/bin/lttng/$LTTNG_BIN list $opts 1> $OUTPUT_DEST 2> $ERROR_OUTPUT_DEST
+	ok $? "Lttng-tool list command with option $opts"
+}
+
+function create_lttng_session_no_output ()
+{
+	local sess_name=$1
+	local opts="${@:2}"
+
+	$TESTDIR/../src/bin/lttng/$LTTNG_BIN create $sess_name --no-output $opts 1> $OUTPUT_DEST 2> $ERROR_OUTPUT_DEST
+	ok $? "Create session $sess_name in no-output mode"
+}
+
+function create_lttng_session_uri () {
+	local sess_name=$1
+	local uri=$2
+	local opts="${@:3}"
+
+	$TESTDIR/../src/bin/lttng/$LTTNG_BIN create $sess_name -U $uri $opts 1> $OUTPUT_DEST 2> $ERROR_OUTPUT_DEST
+	ok $? "Create session $sess_name with uri:$uri and opts: $opts"
+}
+
+function create_lttng_session ()
+{
+	local withtap=$1
+	local expected_to_fail=$2
+	local sess_name=$3
+	local trace_path=$4
+	local opt=$5
+
+	if [ -z "$trace_path" ]; then
+		# Use lttng-sessiond default output.
+		trace_path=""
+	else
+		trace_path="-o $trace_path"
+	fi
+
+	$TESTDIR/../src/bin/lttng/$LTTNG_BIN create "$sess_name" $trace_path $opt 1> $OUTPUT_DEST 2> $ERROR_OUTPUT_DEST
+	ret=$?
+	if [ $expected_to_fail -eq "1" ]; then
+		test "$ret" -ne "0"
+		ret=$?
+		if [ $withtap -eq "1" ]; then
+			ok $ret "Create session $sess_name in $trace_path failed as expected"
+		fi
+	else
+		if [ $withtap -eq "1" ]; then
+			ok $ret "Create session $sess_name in $trace_path"
+		fi
+	fi
+	return $ret
+}
+
+function create_lttng_session_ok ()
+{
+	create_lttng_session 1 0 "$@"
+}
+
+function create_lttng_session_fail ()
+{
+	create_lttng_session 1 1 "$@"
+}
+
+function create_lttng_session_notap ()
+{
+	create_lttng_session 0 0 "$@"
+}
+
+
+function enable_ust_lttng_channel ()
+{
+	local withtap=$1
+	local expected_to_fail=$2
+	local sess_name=$3
+	local channel_name=$4
+	local opts="${@:5}"
+
+	$TESTDIR/../src/bin/lttng/$LTTNG_BIN enable-channel -u $channel_name -s $sess_name $opts 1> $OUTPUT_DEST 2> $ERROR_OUTPUT_DEST
+	ret=$?
+	if [[ $expected_to_fail -eq "1" ]]; then
+		test "$ret" -ne "0"
+		ret=$?
+		if [ $withtap -eq "1" ]; then
+			ok $ret "Enable channel $channel_name for session $sess_name failed as expected"
+		fi
+	else
+		if [ $withtap -eq "1" ]; then
+			ok $ret "Enable channel $channel_name for session $sess_name"
+		fi
+	fi
+	return $ret
+}
+
+function enable_ust_lttng_channel_ok ()
+{
+	enable_ust_lttng_channel 1 0 "$@"
+}
+
+function enable_ust_lttng_channel_fail ()
+{
+	enable_ust_lttng_channel 1 1 "$@"
+}
+
+function enable_ust_lttng_channel_notap ()
+{
+	enable_ust_lttng_channel 0 0 "$@"
+}
+
+function disable_ust_lttng_channel()
+{
+	local sess_name=$1
+	local channel_name=$2
+
+	$TESTDIR/../src/bin/lttng/$LTTNG_BIN disable-channel -u $channel_name -s $sess_name 1> $OUTPUT_DEST 2> $ERROR_OUTPUT_DEST
+	ok $? "Disable channel $channel_name for session $sess_name"
+}
+
+function enable_lttng_mmap_overwrite_kernel_channel()
+{
+	local sess_name=$1
+	local channel_name=$2
+
+	$TESTDIR/../src/bin/lttng/$LTTNG_BIN enable-channel -s $sess_name $channel_name -k --output mmap --overwrite 1> $OUTPUT_DEST 2> $ERROR_OUTPUT_DEST
+	ok $? "Enable channel $channel_name for session $sess_name"
+}
+
+function enable_lttng_mmap_discard_small_kernel_channel()
+{
+	local sess_name=$1
+	local channel_name=$2
+
+	$TESTDIR/../src/bin/lttng/$LTTNG_BIN enable-channel -s $sess_name $channel_name -k --output mmap --discard --subbuf-size=$(getconf PAGE_SIZE) --num-subbuf=2 1> $OUTPUT_DEST 2> $ERROR_OUTPUT_DEST
+	ok $? "Enable small discard channel $channel_name for session $sess_name"
+}
+
+function enable_lttng_mmap_overwrite_small_kernel_channel()
+{
+	local sess_name=$1
+	local channel_name=$2
+
+	$TESTDIR/../src/bin/lttng/$LTTNG_BIN enable-channel -s $sess_name $channel_name -k --output mmap --overwrite --subbuf-size=$(getconf PAGE_SIZE) --num-subbuf=2 1> $OUTPUT_DEST 2> $ERROR_OUTPUT_DEST
+	ok $? "Enable small discard channel $channel_name for session $sess_name"
+}
+
+function enable_lttng_mmap_overwrite_ust_channel()
+{
+	local sess_name=$1
+	local channel_name=$2
+
+	$TESTDIR/../src/bin/lttng/$LTTNG_BIN enable-channel -s $sess_name $channel_name -u --output mmap --overwrite 1> $OUTPUT_DEST 2> $ERROR_OUTPUT_DEST
+	ok $? "Enable channel $channel_name for session $sess_name"
+}
+
+function enable_ust_lttng_event ()
+{
+	local withtap=$1
+	local expected_to_fail=$2
+	local sess_name=$3
+	local event_name="$4"
+	local channel_name=$5
+
+	if [ -z $channel_name ]; then
+		# default channel if none specified
+		chan=""
 	else
 		chan="-c $channel_name"
 	fi
 
-	$TESTDIR/../src/bin/lttng/$LTTNG_BIN enable-event "$event_name" $chan -s $sess_name -u >$OUTPUT_DEST
+	$TESTDIR/../src/bin/lttng/$LTTNG_BIN enable-event "$event_name" $chan -s $sess_name -u 1> $OUTPUT_DEST 2> $ERROR_OUTPUT_DEST
 	ret=$?
-	if [[ $expected_to_fail ]]; then
+	if [[ $expected_to_fail -eq "1" ]]; then
 		test $ret -ne "0"
-		ok $? "Enable ust event $event_name for session $session_name on channel $channel_name failed as expected"
+		ret=$?
+		if [[ $withtap -eq "1" ]]; then
+			ok $ret "Enable ust event $event_name for session $session_name failed as expected"
+		fi
 	else
-		ok $ret "Enable event $event_name for session $sess_name"
+		if [[ $withtap -eq "1" ]]; then
+			ok $ret "Enable ust event $event_name for session $sess_name"
+		fi
 	fi
+	return $ret
+}
+
+function enable_ust_lttng_event_ok ()
+{
+	enable_ust_lttng_event 1 0 "$@"
+}
+
+function enable_ust_lttng_event_fail ()
+{
+	enable_ust_lttng_event 1 1 "$@"
+}
+
+function enable_ust_lttng_event_notap ()
+{
+	enable_ust_lttng_event 0 0 "$@"
 }
 
 function enable_jul_lttng_event()
@@ -405,7 +1145,7 @@ function enable_jul_lttng_event()
 		chan="-c $channel_name"
 	fi
 
-	$TESTDIR/../src/bin/lttng/$LTTNG_BIN enable-event "$event_name" $chan -s $sess_name -j >$OUTPUT_DEST
+	$TESTDIR/../src/bin/lttng/$LTTNG_BIN enable-event "$event_name" $chan -s $sess_name -j 1> $OUTPUT_DEST 2> $ERROR_OUTPUT_DEST
 	ok $? "Enable JUL event $event_name for session $sess_name"
 }
 
@@ -423,7 +1163,7 @@ function enable_jul_lttng_event_loglevel()
 		chan="-c $channel_name"
 	fi
 
-	$TESTDIR/../src/bin/lttng/$LTTNG_BIN enable-event --loglevel $loglevel "$event_name" $chan -s $sess_name -j >$OUTPUT_DEST
+	$TESTDIR/../src/bin/lttng/$LTTNG_BIN enable-event --loglevel $loglevel "$event_name" $chan -s $sess_name -j 1> $OUTPUT_DEST 2> $ERROR_OUTPUT_DEST
 	ok $? "Enable JUL event $event_name for session $sess_name with loglevel $loglevel"
 }
 
@@ -440,7 +1180,7 @@ function enable_log4j_lttng_event()
 		chan="-c $channel_name"
 	fi
 
-	$TESTDIR/../src/bin/lttng/$LTTNG_BIN enable-event "$event_name" $chan -s $sess_name -l >$OUTPUT_DEST
+	$TESTDIR/../src/bin/lttng/$LTTNG_BIN enable-event "$event_name" $chan -s $sess_name -l 1> $OUTPUT_DEST 2> $ERROR_OUTPUT_DEST
 	ok $? "Enable LOG4J event $event_name for session $sess_name"
 }
 
@@ -458,17 +1198,60 @@ function enable_log4j_lttng_event_loglevel()
 		chan="-c $channel_name"
 	fi
 
-	$TESTDIR/../src/bin/lttng/$LTTNG_BIN enable-event --loglevel $loglevel "$event_name" $chan -s $sess_name -l >$OUTPUT_DEST
+	$TESTDIR/../src/bin/lttng/$LTTNG_BIN enable-event --loglevel $loglevel "$event_name" $chan -s $sess_name -l 1> $OUTPUT_DEST 2> $ERROR_OUTPUT_DEST
 	ok $? "Enable LOG4J event $event_name for session $sess_name with loglevel $loglevel"
 }
 
+function enable_python_lttng_event()
+{
+	sess_name=$1
+	event_name="$2"
+	channel_name=$3
+
+	if [ -z $channel_name ]; then
+		# default channel if none specified
+		chan=""
+	else
+		chan="-c $channel_name"
+	fi
+
+	$TESTDIR/../src/bin/lttng/$LTTNG_BIN enable-event "$event_name" $chan -s $sess_name -p 1> $OUTPUT_DEST 2> $ERROR_OUTPUT_DEST
+	ok $? "Enable Python event $event_name for session $sess_name"
+}
+
+function enable_python_lttng_event_loglevel()
+{
+	local sess_name=$1
+	local event_name="$2"
+	local loglevel=$3
+	local channel_name=$4
+
+	if [ -z $channel_name ]; then
+		# default channel if none specified
+		chan=""
+	else
+		chan="-c $channel_name"
+	fi
+
+	$TESTDIR/../src/bin/lttng/$LTTNG_BIN enable-event --loglevel $loglevel "$event_name" $chan -s $sess_name -p 1> $OUTPUT_DEST 2> $ERROR_OUTPUT_DEST
+	ok $? "Enable Python event $event_name for session $sess_name with loglevel $loglevel"
+}
+
 function enable_ust_lttng_event_filter()
 {
 	local sess_name="$1"
 	local event_name="$2"
 	local filter="$3"
+	local channel_name=$4
+
+	if [ -z $channel_name ]; then
+		# default channel if none specified
+		chan=""
+	else
+		chan="-c $channel_name"
+	fi
 
-	$TESTDIR/../src/bin/lttng/$LTTNG_BIN enable-event "$event_name" -s $sess_name -u --filter "$filter" >$OUTPUT_DEST
+	$TESTDIR/../src/bin/lttng/$LTTNG_BIN enable-event $chan "$event_name" -s $sess_name -u --filter "$filter" 1> $OUTPUT_DEST 2> $ERROR_OUTPUT_DEST
 	ok $? "Enable event $event_name with filtering for session $sess_name"
 }
 
@@ -478,7 +1261,7 @@ function enable_ust_lttng_event_loglevel()
 	local event_name="$2"
 	local loglevel="$3"
 
-	$TESTDIR/../src/bin/lttng/$LTTNG_BIN enable-event "$event_name" -s $sess_name -u --loglevel $loglevel >$OUTPUT_DEST
+	$TESTDIR/../src/bin/lttng/$LTTNG_BIN enable-event "$event_name" -s $sess_name -u --loglevel $loglevel 1> $OUTPUT_DEST 2> $ERROR_OUTPUT_DEST
 	ok $? "Enable event $event_name with loglevel $loglevel"
 }
 
@@ -488,7 +1271,7 @@ function enable_ust_lttng_event_loglevel_only()
 	local event_name="$2"
 	local loglevel="$3"
 
-	$TESTDIR/../src/bin/lttng/$LTTNG_BIN enable-event "$event_name" -s $sess_name -u --loglevel-only $loglevel >$OUTPUT_DEST
+	$TESTDIR/../src/bin/lttng/$LTTNG_BIN enable-event "$event_name" -s $sess_name -u --loglevel-only $loglevel 1> $OUTPUT_DEST 2> $ERROR_OUTPUT_DEST
 	ok $? "Enable event $event_name with loglevel-only $loglevel"
 }
 
@@ -505,7 +1288,7 @@ function disable_ust_lttng_event ()
 		chan="-c $channel_name"
 	fi
 
-	$TESTDIR/../src/bin/lttng/$LTTNG_BIN disable-event "$event_name" -s $sess_name $chan -u >$OUTPUT_DEST
+	$TESTDIR/../src/bin/lttng/$LTTNG_BIN disable-event "$event_name" -s $sess_name $chan -u 1> $OUTPUT_DEST 2> $ERROR_OUTPUT_DEST
 	ok $? "Disable event $event_name for session $sess_name"
 }
 
@@ -527,102 +1310,195 @@ function disable_log4j_lttng_event ()
 	ok $? "Disable LOG4J event $event_name for session $sess_name"
 }
 
-function start_lttng_tracing ()
+function disable_python_lttng_event ()
 {
-	local sess_name=$1
-	local expected_to_fail=$2
+	local sess_name="$1"
+	local event_name="$2"
 
-	$TESTDIR/../src/bin/lttng/$LTTNG_BIN start $sess_name >$OUTPUT_DEST
-	ret=$?
-	if [[ $expected_to_fail ]]; then
-		test "$ret" -ne "0"
-		ok $? "Expected fail on start tracing for session: $sess_name"
-	else
-		ok $ret "Start tracing for session $sess_name"
-	fi
+	$TESTDIR/../src/bin/lttng/$LTTNG_BIN disable-event "$event_name" -s $sess_name -p 1> $OUTPUT_DEST 2> $ERROR_OUTPUT_DEST
+	ok $? "Disable Python event $event_name for session $sess_name"
 }
 
-function stop_lttng_tracing ()
+function start_lttng_tracing_opt ()
 {
-	local sess_name=$1
+	local withtap=$1
 	local expected_to_fail=$2
+	local sess_name=$3
 
-	$TESTDIR/../src/bin/lttng/$LTTNG_BIN stop $sess_name >$OUTPUT_DEST
+	$TESTDIR/../src/bin/lttng/$LTTNG_BIN start $sess_name 1> $OUTPUT_DEST 2> $ERROR_OUTPUT_DEST
 	ret=$?
-	if [[ $expected_to_fail ]]; then
+	if [[ $expected_to_fail -eq "1" ]]; then
 		test "$ret" -ne "0"
-		ok $? "Expected fail on stop tracing for session: $sess_name"
+		ret=$?
+		if [ $withtap -eq "1" ]; then
+			ok $? "Start tracing for session $sess_name failed as expected"
+		fi
 	else
-		ok $ret "Stop lttng tracing for session $sess_name"
+		if [ $withtap -eq "1" ]; then
+			ok $ret "Start tracing for session $sess_name"
+		fi
 	fi
 }
 
-function destroy_lttng_session ()
+function start_lttng_tracing_ok ()
 {
-	local sess_name=$1
+	start_lttng_tracing_opt 1 0 "$@"
+}
+
+function start_lttng_tracing_fail ()
+{
+	start_lttng_tracing_opt 1 1 "$@"
+}
+
+function start_lttng_tracing_notap ()
+{
+	start_lttng_tracing_opt 0 1 "$@"
+}
+
+function stop_lttng_tracing_opt ()
+{
+	local withtap=$1
 	local expected_to_fail=$2
+	local sess_name=$3
 
-	$TESTDIR/../src/bin/lttng/$LTTNG_BIN destroy $sess_name >$OUTPUT_DEST
+	$TESTDIR/../src/bin/lttng/$LTTNG_BIN stop $sess_name 1> $OUTPUT_DEST 2> $ERROR_OUTPUT_DEST
 	ret=$?
-	if [[ $expected_to_fail ]]; then
+	if [[ $expected_to_fail -eq "1" ]]; then
 		test "$ret" -ne "0"
-		ok $? "Expected fail on session deletion $sess_name"
+		ret=$?
+		if [ $withtap -eq "1" ]; then
+			ok $? "Stop lttng tracing for session $sess_name failed as expected"
+		fi
 	else
-		ok $ret "Destroy session $sess_name"
+		if [ $withtap -eq "1" ]; then
+			ok $ret "Stop lttng tracing for session $sess_name"
+		fi
 	fi
 }
 
-function destroy_lttng_sessions ()
+function stop_lttng_tracing_ok ()
 {
-	$TESTDIR/../src/bin/lttng/$LTTNG_BIN destroy --all >$OUTPUT_DEST
-	ok $? "Destroy all lttng sessions"
+	stop_lttng_tracing_opt 1 0 "$@"
 }
 
-function lttng_snapshot_add_output ()
+function stop_lttng_tracing_fail ()
 {
-	local sess_name=$1
-	local trace_path=$2
-	local expected_to_fail=$3
+	stop_lttng_tracing_opt 1 1 "$@"
+}
 
-	$TESTDIR/../src/bin/lttng/$LTTNG_BIN snapshot add-output -s $sess_name file://$trace_path >$OUTPUT_DEST
-	ret=$?
-	if [[ $expected_to_fail ]]; then
-		test "$ret" -ne "0"
-		ok $? "Failed to add a  snapshot output file://$trace_path as expected"
-	else
-		ok $ret "Added snapshot output file://$trace_path"
-	fi
+function stop_lttng_tracing_notap ()
+{
+	stop_lttng_tracing_opt 0 0 "$@"
 }
 
-function lttng_snapshot_del_output ()
+function destroy_lttng_session ()
 {
-	local sess_name=$1
-	local id=$2
-	local expected_to_fail=$3
+	local withtap=$1
+	local expected_to_fail=$2
+	local sess_name=$3
 
-	$TESTDIR/../src/bin/lttng/$LTTNG_BIN snapshot del-output -s $sess_name $id >$OUTPUT_DEST
+	$TESTDIR/../src/bin/lttng/$LTTNG_BIN destroy $sess_name 1> $OUTPUT_DEST 2> $ERROR_OUTPUT_DEST
 	ret=$?
-	if [[ $expected_to_fail ]]; then
+	if [[ $expected_to_fail -eq "1" ]]; then
 		test "$ret" -ne "0"
-		ok $? "Expect fail on deletion of snapshot output id $id"
+		ret=$?
+		if [ $withtap -eq "1" ]; then
+			ok $ret "Destroy session $sess_name failed as expected"
+		fi
 	else
-		ok $ret "Deleted snapshot output id $id"
+		if [ $withtap -eq "1" ]; then
+			ok $ret "Destroy session $sess_name"
+		fi
 	fi
 }
 
-function lttng_snapshot_record ()
+function destroy_lttng_session_ok ()
 {
-	local sess_name=$1
-	local trace_path=$2
+	destroy_lttng_session 1 0 "$@"
+
+}
+
+function destroy_lttng_session_fail ()
+{
+	destroy_lttng_session 1 1 "$@"
+}
+
+function destroy_lttng_session_notap ()
+{
+	destroy_lttng_session 0 0 "$@"
+}
+
+function destroy_lttng_sessions ()
+{
+	$TESTDIR/../src/bin/lttng/$LTTNG_BIN destroy --all 1> $OUTPUT_DEST 2> $ERROR_OUTPUT_DEST
+	ok $? "Destroy all lttng sessions"
+}
+
+function lttng_snapshot_add_output ()
+{
+	local expected_to_fail=$1
+	local sess_name=$2
+	local trace_path=$3
+	local opts=$4
+
+	$TESTDIR/../src/bin/lttng/$LTTNG_BIN snapshot add-output -s $sess_name $trace_path $opts 1> $OUTPUT_DEST 2> $ERROR_OUTPUT_DEST
+	ret=$?
+	if [[ $expected_to_fail -eq 1 ]]; then
+		test "$ret" -ne "0"
+		ok $? "Added snapshot output $trace_path failed as expected"
+	else
+		ok $ret "Added snapshot output $trace_path"
+	fi
+}
+
+function lttng_snapshot_add_output_ok ()
+{
+	lttng_snapshot_add_output 0 "$@"
+}
+
+function lttng_snapshot_add_output_fail ()
+{
+	lttng_snapshot_add_output 1 "$@"
+}
+
+function lttng_snapshot_del_output ()
+{
+	local expected_to_fail=$1
+	local sess_name=$2
+	local id=$3
+
+	$TESTDIR/../src/bin/lttng/$LTTNG_BIN snapshot del-output -s $sess_name $id 1> $OUTPUT_DEST 2> $ERROR_OUTPUT_DEST
+	ret=$?
+	if [[ $expected_to_fail -eq "1" ]]; then
+		test "$ret" -ne "0"
+		ok $? "Deleted snapshot output id $id failed as expected"
+	else
+		ok $ret "Deleted snapshot output id $id"
+	fi
+}
+
+function lttng_snapshot_del_output_ok ()
+{
+	lttng_snapshot_del_output 0 "$@"
+}
+
+function lttng_snapshot_del_output_fail ()
+{
+	lttng_snapshot_del_output 1 "$@"
+}
 
-	$TESTDIR/../src/bin/lttng/$LTTNG_BIN snapshot record -s $sess_name >$OUTPUT_DEST
+function lttng_snapshot_record ()
+{
+	local sess_name=$1
+
+	$TESTDIR/../src/bin/lttng/$LTTNG_BIN snapshot record -s $sess_name $trace_path 1> $OUTPUT_DEST 2> $ERROR_OUTPUT_DEST
 	ok $? "Snapshot recorded"
 }
 
 function lttng_snapshot_list ()
 {
 	local sess_name=$1
-	$TESTDIR/../src/bin/lttng/$LTTNG_BIN snapshot list-output -s $sess_name >$OUTPUT_DEST
+	$TESTDIR/../src/bin/lttng/$LTTNG_BIN snapshot list-output -s $sess_name 1> $OUTPUT_DEST 2> $ERROR_OUTPUT_DEST
 	ok $? "Snapshot list"
 }
 
@@ -631,16 +1507,230 @@ function lttng_save()
 	local sess_name=$1
 	local opts=$2
 
-	$TESTDIR/../src/bin/lttng/$LTTNG_BIN save $sess_name $opts >$OUTPUT_DEST
-	ok $? "Session successfully saved"
+	$TESTDIR/../src/bin/lttng/$LTTNG_BIN save $sess_name $opts 1> $OUTPUT_DEST 2> $ERROR_OUTPUT_DEST
+	ok $? "Session saved"
 }
 
 function lttng_load()
 {
-	local opts=$1
+	local expected_to_fail=$1
+	local opts=$2
+
+	$TESTDIR/../src/bin/lttng/$LTTNG_BIN load $opts 1> $OUTPUT_DEST 2> $ERROR_OUTPUT_DEST
+	ret=$?
+	if [[ $expected_to_fail -eq "1" ]]; then
+		test $ret -ne "0"
+		ok $? "Load command failed as expected with opts: $opts"
+	else
+		ok $ret "Load command with opts: $opts"
+	fi
+}
+
+function lttng_load_ok()
+{
+	lttng_load 0 "$@"
+}
+
+function lttng_load_fail()
+{
+	lttng_load 1 "$@"
+}
+
+function lttng_track()
+{
+	local expected_to_fail="$1"
+	shift 1
+	local opts="$@"
+	$TESTDIR/../src/bin/lttng/$LTTNG_BIN track $opts >$OUTPUT_DEST
+	ret=$?
+	if [[ $expected_to_fail -eq "1" ]]; then
+		test $ret -ne "0"
+		ok $? "Track command failed as expected with opts: $opts"
+	else
+		ok $ret "Track command with opts: $opts"
+	fi
+}
+
+function lttng_track_ok()
+{
+	lttng_track 0 "$@"
+}
+
+function lttng_track_fail()
+{
+	lttng_track 1 "$@"
+}
+
+function lttng_untrack()
+{
+	local expected_to_fail="$1"
+	shift 1
+	local opts="$@"
+	$TESTDIR/../src/bin/lttng/$LTTNG_BIN untrack $opts >$OUTPUT_DEST
+	ret=$?
+	if [[ $expected_to_fail -eq "1" ]]; then
+		test $ret -ne "0"
+		ok $? "Untrack command failed as expected with opts: $opts"
+	else
+		ok $ret "Untrack command with opts: $opts"
+	fi
+}
+
+function lttng_untrack_ok()
+{
+	lttng_untrack 0 "$@"
+}
+
+function lttng_untrack_fail()
+{
+	lttng_untrack 1 "$@"
+}
+
+function lttng_track_pid_ok()
+{
+	PID=$1
+	"$TESTDIR/../src/bin/lttng/$LTTNG_BIN" track --kernel --pid=$PID 1> $OUTPUT_DEST 2> $ERROR_OUTPUT_DEST
+	ok $? "Lttng track pid on the kernel domain"
+}
+
+function lttng_untrack_kernel_all_ok()
+{
+	"$TESTDIR/../src/bin/lttng/$LTTNG_BIN" untrack --kernel --pid --all 1> $OUTPUT_DEST 2> $ERROR_OUTPUT_DEST
+	ok $? "Lttng untrack all pid on the kernel domain"
+}
+
+function lttng_track_ust_ok()
+{
+	lttng_track_ok -u "$@"
+}
+
+function lttng_track_ust_fail()
+{
+	lttng_track_fail -u "$@"
+}
+
+function lttng_track_kernel_ok()
+{
+	lttng_track_ok -k "$@"
+}
+
+function lttng_track_kernel_fail()
+{
+	lttng_track_fail -k "$@"
+}
+
+function lttng_untrack_ust_ok()
+{
+	lttng_untrack_ok -u "$@"
+}
+
+function lttng_untrack_ust_fail()
+{
+	lttng_untrack_fail -u "$@"
+}
+
+function lttng_untrack_kernel_ok()
+{
+	lttng_untrack_ok -k "$@"
+}
+
+function lttng_untrack_kernel_fail()
+{
+	lttng_untrack_fail -k "$@"
+}
+
+function lttng_add_context_list()
+{
+	$TESTDIR/../src/bin/lttng/$LTTNG_BIN add-context --list 1> $OUTPUT_DEST 2> $ERROR_OUTPUT_DEST
+	ret=$?
+	ok $ret "Context listing"
+}
+
+function add_context_lttng()
+{
+	local expected_to_fail="$1"
+	local domain="$2"
+	local session_name="$3"
+	local channel_name="$4"
+	local type="$5"
+
+	$TESTDIR/../src/bin/lttng/$LTTNG_BIN add-context -s $session_name -c $channel_name -t $type $domain  1> $OUTPUT_DEST 2> $ERROR_OUTPUT_DEST
+	ret=$?
+	if [[ $expected_to_fail -eq "1" ]]; then
+		test $ret -ne "0"
+		ok $? "Add context command failed as expected for type: $type"
+	else
+		ok $ret "Add context command for type: $type"
+	fi
+}
+
+function add_context_ust_ok()
+{
+	add_context_lttng 0 -u "$@"
+}
+
+function add_context_ust_fail()
+{
+	add_context_lttng 1 -u "$@"
+}
+
+function add_context_kernel_ok()
+{
+	add_context_lttng 0 -k "$@"
+}
+
+function add_context_kernel_fail()
+{
+	add_context_lttng 1 -k "$@"
+}
+
+function wait_live_trace_ready ()
+{
+	local url=$1
+	local zero_client_match=0
+
+	diag "Waiting for live trace at url: $url"
+	while [ $zero_client_match -eq 0 ]; do
+		zero_client_match=$($BABELTRACE_BIN -i lttng-live $url | grep "0 client(s) connected" | wc -l)
+		sleep 0.5
+	done
+	pass "Waiting for live trace at url: $url"
+}
+
+function wait_live_viewer_connect ()
+{
+	local url=$1
+	local one_client_match=0
+
+	diag "Waiting for live viewers on url: $url"
+	while [ $one_client_match -eq 0 ]; do
+		one_client_match=$($BABELTRACE_BIN -i lttng-live $url | grep "1 client(s) connected" | wc -l)
+		sleep 0.5
+	done
+	pass "Waiting for live viewers on url: $url"
+}
+
+function validate_metadata_event ()
+{
+	local event_name=$1
+	local nr_event_id=$2
+	local trace_path=$3
+
+	local metadata_file=$(find $trace_path | grep metadata)
+	local metadata_path=$(dirname $metadata_file)
+
+	which $BABELTRACE_BIN >/dev/null
+	skip $? -ne 0 "Babeltrace binary not found. Skipping trace matches"
+
+	local count=$($BABELTRACE_BIN --output-format=ctf-metadata $metadata_path | grep $event_name | wc -l)
+
+	if [ "$count" -ne "$nr_event_id" ]; then
+		fail "Metadata match with the metadata of $count event(s) named $event_name"
+		diag "$count matching event id found in metadata"
+	else
+		pass "Metadata match with the metadata of $count event(s) named $event_name"
+	fi
 
-	$TESTDIR/../src/bin/lttng/$LTTNG_BIN load $opts >$OUTPUT_DEST
-	ok $? "Load command successful"
 }
 
 function trace_matches ()
@@ -656,7 +1746,7 @@ function trace_matches ()
 
 	if [ "$count" -ne "$nr_iter" ]; then
 		fail "Trace match"
-		diag "$count events found in trace"
+		diag "$count matching events found in trace"
 	else
 		pass "Trace match"
 	fi
@@ -674,12 +1764,12 @@ function trace_match_only()
 	local count=$($BABELTRACE_BIN $trace_path | grep $event_name | wc -l)
 	local total=$($BABELTRACE_BIN $trace_path | wc -l)
 
-    if [ "$nr_iter" -eq "$count" ] && [ "$total" -eq "$nr_iter" ]; then
-        pass "Trace match with $total event $event_name"
-    else
-        fail "Trace match"
-        diag "$total event(s) found, expecting $nr_iter of event $event_name and only found $count"
-    fi
+	if [ "$nr_iter" -eq "$count" ] && [ "$total" -eq "$nr_iter" ]; then
+		pass "Trace match with $total event $event_name"
+	else
+		fail "Trace match"
+		diag "$total event(s) found, expecting $nr_iter of event $event_name and only found $count"
+	fi
 }
 
 function validate_trace
@@ -708,6 +1798,77 @@ function validate_trace
 	return $ret
 }
 
+function validate_trace_count
+{
+	local event_name=$1
+	local trace_path=$2
+	local expected_count=$3
+
+	which $BABELTRACE_BIN >/dev/null
+	if [ $? -ne 0 ]; then
+	    skip 0 "Babeltrace binary not found. Skipping trace validation"
+	fi
+
+	cnt=0
+	OLDIFS=$IFS
+	IFS=","
+	for i in $event_name; do
+		traced=$($BABELTRACE_BIN $trace_path 2>/dev/null | grep $i | wc -l)
+		if [ "$traced" -ne 0 ]; then
+			pass "Validate trace for event $i, $traced events"
+		else
+			fail "Validate trace for event $i"
+			diag "Found $traced occurences of $i"
+		fi
+		cnt=$(($cnt + $traced))
+	done
+	IFS=$OLDIFS
+	test $cnt -eq $expected_count
+	ok $? "Read a total of $cnt events, expected $expected_count"
+}
+
+function validate_trace_count_range_incl_min_excl_max
+{
+	local event_name=$1
+	local trace_path=$2
+	local expected_min=$3
+	local expected_max=$4
+
+	which $BABELTRACE_BIN >/dev/null
+	if [ $? -ne 0 ]; then
+	    skip 0 "Babeltrace binary not found. Skipping trace validation"
+	fi
+
+	cnt=0
+	OLDIFS=$IFS
+	IFS=","
+	for i in $event_name; do
+		traced=$($BABELTRACE_BIN $trace_path 2>/dev/null | grep $i | wc -l)
+		if [ "$traced" -ge $expected_min ]; then
+			pass "Validate trace for event $i, $traced events"
+		else
+			fail "Validate trace for event $i"
+			diag "Found $traced occurences of $i"
+		fi
+		cnt=$(($cnt + $traced))
+	done
+	IFS=$OLDIFS
+	test $cnt -lt $expected_max
+	ok $? "Read a total of $cnt events, expected between [$expected_min, $expected_max["
+}
+
+function trace_first_line
+{
+	local trace_path=$1
+
+	which $BABELTRACE_BIN >/dev/null
+	if [ $? -ne 0 ]; then
+	    skip 0 "Babeltrace binary not found. Skipping trace validation"
+	fi
+
+	$BABELTRACE_BIN $trace_path 2>/dev/null | head -n 1
+}
+
 function validate_trace_exp()
 {
 	local event_exp=$1
@@ -716,7 +1877,7 @@ function validate_trace_exp()
 	which $BABELTRACE_BIN >/dev/null
 	skip $? -ne 0 "Babeltrace binary not found. Skipping trace validation"
 
-	traced=$($BABELTRACE_BIN $trace_path 2>/dev/null | grep ${event_exp} | wc -l)
+	traced=$($BABELTRACE_BIN $trace_path 2>/dev/null | grep --extended-regexp ${event_exp} | wc -l)
 	if [ "$traced" -ne 0 ]; then
 		pass "Validate trace for expression '${event_exp}', $traced events"
 	else
@@ -735,11 +1896,11 @@ function validate_trace_only_exp()
 	which $BABELTRACE_BIN >/dev/null
 	skip $? -ne 0 "Babeltrace binary not found. Skipping trace matches"
 
-	local count=$($BABELTRACE_BIN $trace_path | grep ${event_exp} | wc -l)
+	local count=$($BABELTRACE_BIN $trace_path | grep --extended-regexp ${event_exp} | wc -l)
 	local total=$($BABELTRACE_BIN $trace_path | wc -l)
 
 	if [ "$count" -ne 0 ] && [ "$total" -eq "$count" ]; then
-		pass "Trace match with $total for expression '${event_exp}"
+		pass "Trace match with $total for expression '${event_exp}'"
 	else
 		fail "Trace match"
 		diag "$total syscall event(s) found, only syscalls matching expression '${event_exp}' ($count occurrences) are expected"
@@ -757,7 +1918,14 @@ function validate_trace_empty()
 	    skip 0 "Babeltrace binary not found. Skipping trace validation"
 	fi
 
-	traced=$($BABELTRACE_BIN $trace_path 2>/dev/null | wc -l)
+	events=$($BABELTRACE_BIN $trace_path 2>/dev/null)
+	ret=$?
+	if [ $ret -ne 0 ]; then
+		fail "Failed to parse trace"
+		return $ret
+	fi
+
+	traced=$(echo -n "$events" | wc -l)
 	if [ "$traced" -eq 0 ]; then
 		pass "Validate empty trace"
 	else
@@ -767,3 +1935,243 @@ function validate_trace_empty()
 	ret=$?
 	return $ret
 }
+
+function validate_directory_empty ()
+{
+	local trace_path="$1"
+
+	# Do not double quote `$trace_path` below as we want wildcards to be
+	# expanded.
+	files="$(ls -A $trace_path)"
+	ret=$?
+	if [ $ret -ne 0 ]; then
+		fail "Failed to list content of directory \"$trace_path\""
+		return $ret
+	fi
+
+	nb_files="$(echo -n "$files" | wc -l)"
+	ok $nb_files "Directory \"$trace_path\" is empty"
+}
+
+function validate_trace_session_ust_empty()
+{
+	validate_directory_empty "$1"/ust
+}
+
+function validate_trace_session_kernel_empty()
+{
+	validate_trace_empty "$1"/kernel
+}
+
+function regenerate_metadata ()
+{
+	local expected_to_fail=$1
+	local sess_name=$2
+
+	$TESTDIR/../src/bin/lttng/$LTTNG_BIN regenerate metadata -s $sess_name 1> $OUTPUT_DEST 2> $ERROR_OUTPUT_DEST
+	ret=$?
+	if [[ $expected_to_fail -eq "1" ]]; then
+		test "$ret" -ne "0"
+		ok $? "Expected fail on regenerate metadata $sess_name"
+	else
+		ok $ret "Metadata regenerate $sess_name"
+	fi
+}
+
+function regenerate_metadata_ok ()
+{
+	regenerate_metadata 0 "$@"
+}
+
+function regenerate_metadata_fail ()
+{
+	regenerate_metadata 1 "$@"
+}
+
+function regenerate_statedump ()
+{
+	local expected_to_fail=$1
+	local sess_name=$2
+
+	$TESTDIR/../src/bin/lttng/$LTTNG_BIN regenerate statedump -s $sess_name 1> $OUTPUT_DEST 2> $ERROR_OUTPUT_DEST
+	ret=$?
+	if [[ $expected_to_fail -eq "1" ]]; then
+		test "$ret" -ne "0"
+		ok $? "Expected fail on regenerate statedump $sess_name"
+	else
+		ok $ret "Statedump regenerate $sess_name"
+	fi
+}
+
+function regenerate_statedump_ok ()
+{
+	regenerate_statedump 0 "$@"
+}
+
+function regenerate_statedump_fail ()
+{
+	regenerate_statedump 1 "$@"
+}
+
+function rotate_session ()
+{
+	local expected_to_fail=$1
+	local sess_name=$2
+
+	$TESTDIR/../src/bin/lttng/$LTTNG_BIN rotate $sess_name 1> $OUTPUT_DEST 2> $ERROR_OUTPUT_DEST
+	ret=$?
+	if [[ $expected_to_fail -eq "1" ]]; then
+		test "$ret" -ne "0"
+		ok $? "Expected fail on rotate session $sess_name"
+	else
+		ok $ret "Rotate session $sess_name"
+	fi
+}
+
+function rotate_session_ok ()
+{
+	rotate_session 0 "$@"
+}
+
+function rotate_session_fail ()
+{
+	rotate_session 1 "$@"
+}
+
+function destructive_tests_enabled ()
+{
+	if [ ${LTTNG_ENABLE_DESTRUCTIVE_TESTS} = "will-break-my-system" ]; then
+		return 0
+	else
+		return 1
+	fi
+}
+
+function lttng_enable_rotation_timer ()
+{
+	local expected_to_fail=$1
+	local sess_name=$2
+	local period=$3
+
+	$TESTDIR/../src/bin/lttng/$LTTNG_BIN enable-rotation -s $sess_name --timer $period 1> $OUTPUT_DEST 2> $ERROR_OUTPUT_DEST
+	ret=$?
+	if [[ $expected_to_fail -eq "1" ]]; then
+		test "$ret" -ne "0"
+		ok $? "Expected fail when setting periodic rotation ($period) of session $sess_name"
+	else
+		ok $ret "Set periodic rotation ($period) of session $sess_name"
+	fi
+}
+
+function lttng_enable_rotation_timer_ok ()
+{
+	lttng_enable_rotation_timer 0 $@
+}
+
+function lttng_enable_rotation_timer_fail ()
+{
+	lttng_enable_rotation_timer 1 $@
+}
+
+function lttng_enable_rotation_size ()
+{
+	local expected_to_fail=$1
+	local sess_name=$2
+	local size=$3
+
+	$TESTDIR/../src/bin/lttng/$LTTNG_BIN enable-rotation -s $sess_name --size $size 1> $OUTPUT_DEST 2> $ERROR_OUTPUT_DEST
+	ret=$?
+	if [[ $expected_to_fail -eq "1" ]]; then
+		test "$ret" -ne "0"
+		ok $? "Expected fail on rotate session $sess_name"
+	else
+		ok $ret "Rotate session $sess_name"
+	fi
+}
+
+function lttng_enable_rotation_size_ok ()
+{
+	lttng_enable_rotation_size 0 $@
+}
+
+function lttng_enable_rotation_size_fail ()
+{
+	lttng_enable_rotation_size 1 $@
+}
+
+function lttng_clear_session ()
+{
+	local expected_to_fail=$1
+	local sess_name=$2
+
+	$TESTDIR/../src/bin/lttng/$LTTNG_BIN clear $sess_name 1> $OUTPUT_DEST 2> $ERROR_OUTPUT_DEST
+	ret=$?
+	if [[ $expected_to_fail -eq "1" ]]; then
+		test "$ret" -ne "0"
+		ok $? "Expected fail on clear session $sess_name"
+	else
+		ok $ret "Clear session $sess_name"
+	fi
+}
+
+function lttng_clear_session_ok ()
+{
+	lttng_clear_session 0 $@
+}
+
+function lttng_clear_session_fail ()
+{
+	lttng_clear_session 1 $@
+}
+
+function lttng_clear_all ()
+{
+	$TESTDIR/../src/bin/lttng/$LTTNG_BIN clear --all 1> $OUTPUT_DEST 2> $ERROR_OUTPUT_DEST
+	ok $? "Clear all lttng sessions"
+}
+
+function lttng_add_trigger()
+{
+	local expected_to_fail="$1"
+	local trigger_name="$2"
+	shift 2
+
+	$TESTDIR/../src/bin/lttng/$LTTNG_BIN add-trigger --id "$trigger_name" "$@" 1> /dev/null 2> /dev/null
+	ret=$?
+	if [[ $expected_to_fail -eq "1" ]]; then
+		test "$ret" -ne "0"
+		ok $? "Add trigger $trigger_name failed as expected"
+	else
+		ok $ret "Add trigger $trigger_name"
+	fi
+}
+
+function lttng_remove_trigger()
+{
+	local expected_to_fail="$1"
+	local trigger_name="$2"
+
+	$TESTDIR/../src/bin/lttng/$LTTNG_BIN remove-trigger "$trigger_name" 1> /dev/null 2> /dev/null
+	ret=$?
+	if [[ $expected_to_fail -eq "1" ]]; then
+		test "$ret" -ne "0"
+		ok $? "Remove trigger $trigger_name failed as expected"
+	else
+		ok $ret "Remove trigger $trigger_name"
+	fi
+}
+
+function lttng_add_trigger_ok()
+{
+	lttng_add_trigger 0 "$@"
+}
+
+function lttng_add_trigger_fail()
+{
+	lttng_add_trigger 1 "$@"
+}
+
+function lttng_remove_trigger_ok()
+{
+	lttng_remove_trigger 0 "$@"
+}