X-Git-Url: https://git.lttng.org/?p=lttng-tools.git;a=blobdiff_plain;f=tests%2Futils%2Futils.sh;h=e463e4fe34476eb347a370a19c827dce7b68eb98;hp=3a619201f936d3ec3b9ea6a3f81beabcd9570c55;hb=HEAD;hpb=ab95d85d8784a545ff66c2025110829e9b5cb1b8

diff --git a/tests/utils/utils.sh b/tests/utils/utils.sh
index 3a619201f..0e8ec54dd 100644
--- a/tests/utils/utils.sh
+++ b/tests/utils/utils.sh
@@ -1,32 +1,33 @@
-# Copyright (C) - 2012 David Goulet <dgoulet@efficios.com>
+# Copyright (C) 2012 David Goulet <dgoulet@efficios.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.
+# SPDX-License-Identifier: LGPL-2.1-only
 #
-# 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.*"
-SESSIOND_PIDS=""
 RUNAS_BIN="lttng-runas"
 RUNAS_MATCH=".*lttng-runas.*"
 CONSUMERD_BIN="lttng-consumerd"
 CONSUMERD_MATCH=".*lttng-consumerd.*"
 RELAYD_BIN="lttng-relayd"
 RELAYD_MATCH=".*lttng-relayd.*"
-RELAYD_PIDS=""
 LTTNG_BIN="lttng"
-BABELTRACE_BIN="babeltrace"
+BABELTRACE_BIN="babeltrace2"
 OUTPUT_DEST=/dev/null
 ERROR_OUTPUT_DEST=/dev/null
+MI_XSD_MAJOR_VERSION=4
+MI_XSD_MINOR_VERSION=1
+MI_XSD_PATH="$TESTDIR/../src/common/mi-lttng-${MI_XSD_MAJOR_VERSION}.${MI_XSD_MINOR_VERSION}.xsd"
+MI_VALIDATE="$TESTDIR/utils/xml-utils/validate_xml ${MI_XSD_PATH}"
+
+XML_PRETTY="$TESTDIR/utils/xml-utils/pretty_xml"
+XML_EXTRACT="$TESTDIR/utils/xml-utils/extract_xml"
+XML_NODE_CHECK="${XML_EXTRACT} -e"
+
+# To match 20201127-175802
+date_time_pattern="[0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9]-[0-9][0-9][0-9][0-9][0-9][0-9]"
+# The size of a long on this system
+system_long_bit_size=$(getconf LONG_BIT)
 
 # Minimal kernel version supported for session daemon tests
 KERNEL_MAJOR_VERSION=2
@@ -48,22 +49,115 @@ export LTTNG_SESSIOND_PATH="/bin/true"
 
 source $TESTDIR/utils/tap/tap.sh
 
-function full_cleanup ()
+if [ -z ${LTTNG_TEST_TEARDOWN_TIMEOUT+x} ]; then
+	LTTNG_TEST_TEARDOWN_TIMEOUT=60
+fi
+
+# Enable job monitor mode.
+# Here we are mostly interested in the following from the monitor mode:
+#    All processes run in a separate process group.
+# This allows us to ensure that all subprocesses from all background tasks are
+# cleaned up correctly using signal to process group id.
+set -m
+
+kill_background_jobs ()
 {
-	if [ -n "${SESSIOND_PIDS}" ] || [ -n "${RELAYD_PIDS}" ]; then
-		kill -9 ${SESSIOND_PIDS} ${RELAYD_PIDS} > /dev/null 2>&1
+	local pids
+	pids=$(jobs -p)
+
+	if [ -z "$pids" ]; then
+		# Empty
+		return 0
 	fi
 
-	# Disable trap for SIGTERM since the following kill to the
-	# pidgroup will be SIGTERM. Otherwise it loops.
-	# The '-' before the pid number ($$) indicates 'kill' to signal the
-	# whole process group.
-	trap - SIGTERM && kill -- -$$
+	while read -r pid;
+	do
+		# Use negative number to send the signal to the process group.
+		# This ensure that any subprocesses receive the signal.
+		# /dev/null is used since there is an acceptable race between
+		# the moments the pids are listed and the moment we send a
+		# signal.
+		kill -SIGTERM -- "-$pid" 2>/dev/null
+	done <<< "$pids"
+}
+
+function cleanup ()
+{
+	# Try to kill daemons gracefully
+	stop_lttng_relayd_cleanup SIGTERM $LTTNG_TEST_TEARDOWN_TIMEOUT
+	stop_lttng_sessiond_cleanup SIGTERM $LTTNG_TEST_TEARDOWN_TIMEOUT
+
+	# If daemons are still present, forcibly kill them
+	stop_lttng_relayd_cleanup SIGKILL $LTTNG_TEST_TEARDOWN_TIMEOUT
+	stop_lttng_sessiond_cleanup SIGKILL $LTTNG_TEST_TEARDOWN_TIMEOUT
+	stop_lttng_consumerd_cleanup SIGKILL $LTTNG_TEST_TEARDOWN_TIMEOUT
+
+	kill_background_jobs
+}
+
+function full_cleanup ()
+{
+	cleanup
+	exit 1
+}
+
+function LTTNG_BAIL_OUT ()
+{
+	cleanup
+	BAIL_OUT "$@"
 }
 
+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 "$possible_pids" ]; then
+		return 0
+	fi
+
+	while IFS= read -r pid ; do
+		# /proc/pid/cmdline is null separated.
+		if full_command_no_argument=$( (tr '\0' '\n' < /proc/"$pid"/cmdline) 2>/dev/null | head -n1); then
+			command_basename=$(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
@@ -110,11 +204,115 @@ function validate_kernel_version ()
 #  $2 = include special characters; 1 = yes, 0 = no; defaults to yes
 function randstring()
 {
+	local len="${1:-16}"
+
 	[ "$2" == "0" ] && CHAR="[:alnum:]" || CHAR="[:graph:]"
-	cat /dev/urandom 2>/dev/null | tr -cd "$CHAR" 2>/dev/null | head -c ${1:-16} 2>/dev/null
+	# /dev/urandom isn't guaranteed to generate valid multi-byte characters.
+	# Specifying the C locale eliminates the "Illegal byte sequence" error
+	# that 'tr' outputs in such cases.
+	LC_CTYPE=C tr -cd "$CHAR" < /dev/urandom 2>/dev/null | head -c "$len" 2>/dev/null
 	echo
 }
 
+# Return a space-separated string of online CPU IDs, based on
+# /sys/devices/system/cpu/online, or from 0 to nproc - 1 otherwise.
+function get_online_cpus()
+{
+	local cpus=()
+	local range_re
+	if [ -f /sys/devices/system/cpu/online ]; then
+		range_re='([0-9]+)-([0-9]+)'
+		while read -r range ; do
+			if [[ "${range}" =~ ${range_re} ]] ; then
+				mapfile -t -O "${#cpus[*]}" cpus <<< $(seq "${BASH_REMATCH[1]}" "${BASH_REMATCH[2]}")
+			else
+				cpus+=("${range}")
+			fi
+		done < <(tr ',' $'\n' < /sys/devices/system/cpu/online)
+	else
+		read -r -a cpus <<< $(seq 0 $(( $(conf_proc_count) - 1 )) )
+	fi
+	echo "${cpus[*]}"
+}
+
+# Helpers for get_possible_cpus.
+function get_possible_cpus_count_from_sysfs_possible_mask()
+{
+	local max_possible_cpu_id
+
+	# The Awk script extracts the highest CPU id from the possible CPU
+	# mask. Assuming a numerical order, a field separator '-' and a record
+	# separator ','. The last value parsed is the highest id.
+	if [ -f /sys/devices/system/cpu/possible ]; then
+		max_possible_cpu_id=$(awk -F '-' 'BEGIN { RS = ","} { last = $NF } END { printf("%d\n", last) }' \
+				      /sys/devices/system/cpu/possible)
+		echo "$((max_possible_cpu_id+1))"
+	else
+		echo "0"
+	fi
+}
+
+# This is a fallback if the possible CPU mask is not available. This will not
+# take into account unplugged CPUs.
+function get_max_cpus_count_from_sysfs_cpu_directories()
+{
+	local max_possible_cpu_id=0
+	local current_cpu_id
+
+	for i in /sys/devices/system/cpu/cpu[0-9]*; do
+		current_cpu_id="${i#/sys/devices/system/cpu/cpu}"
+		if [ "$current_cpu_id" -gt "$max_possible_cpu_id" ]; then
+			max_possible_cpu_id="$current_cpu_id"
+		fi
+	done
+
+	echo "$((max_possible_cpu_id+1))"
+}
+
+# Return the number of possible CPUs.
+function get_possible_cpus_count()
+{
+	local possible_cpus_count
+	possible_cpus_count=$(get_possible_cpus_count_from_sysfs_possible_mask)
+
+	if [ "$possible_cpus_count" -eq "0" ]; then
+		local configured_cpus_count
+		configured_cpus_count=$(getconf _NPROCESSORS_CONF)
+		possible_cpus_count=$(get_max_cpus_count_from_sysfs_cpu_directories)
+		possible_cpus_count=$((configured_cpus_count > possible_cpus_count \
+							     ? configured_cpus_count \
+							     : possible_cpus_count))
+	fi
+
+	echo "$possible_cpus_count"
+}
+
+# Return the list of exposed CPU.
+#
+# NOTE! Use it like so:
+#
+# IFS=" " read -r -a VARIABLE <<< "$(get_exposed_cpus_list)"
+function get_exposed_cpus_list()
+{
+	local list=()
+
+	for i in /sys/devices/system/cpu/cpu[0-9]*; do
+		list+=("${i#/sys/devices/system/cpu/cpu}")
+	done
+
+	echo "${list[@]}"
+}
+
+# Return any available CPU found. Do not make assumption about the returned
+# value, e.g. that it could be 0.
+function get_any_available_cpu()
+{
+	for cpu in $(get_online_cpus); do
+		echo "${cpu}"
+		break;
+	done
+}
+
 # Return the number of _configured_ CPUs.
 function conf_proc_count()
 {
@@ -125,14 +323,72 @@ function conf_proc_count()
 	echo
 }
 
+# Usage:
+# check_skip_kernel_test [NB_TESTS] [SKIP_MESSAGE]
+# Return 0 if LTTNG_TOOLS_DISABLE_KERNEL_TESTS was set or the current user is not a root user
+# If NB_TESTS is set, call skip() to skip number of tests.
+# If NB_TESTS is empty, just output a reason with diag.
+# An optional message can be added.
+
+function check_skip_kernel_test ()
+{
+	local num_tests="$1"
+	local skip_message="$2"
+
+	# Check for skip test kernel flag
+	if [ "$LTTNG_TOOLS_DISABLE_KERNEL_TESTS" == "1" ]; then
+		if ! test -z "$num_tests"; then
+			skip 0 "LTTNG_TOOLS_DISABLE_KERNEL_TESTS was set.${skip_message+ }${skip_message}" "$num_tests"
+		else
+			diag "LTTNG_TOOLS_DISABLE_KERNEL_TESTS was set.${skip_message+ }${skip_message}"
+		fi
+		return 0
+	fi
+
+	# Check if we are running as root
+	if [ "$(id -u)" != "0" ]; then
+		if ! test -z "$num_tests"; then
+			skip 0 "Root access is needed for kernel testing.${skip_message+ }${skip_message}" "$num_tests"
+		else
+			diag "Root access is needed for kernel testing.${skip_message+ }${skip_message}"
+		fi
+		return 0
+	fi
+
+	return 1
+}
+
 # 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 [ $? -ne 0  ]; then
-		BAIL_OUT "LTTng modules not detected."
+	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
+
+	LTTNG_BAIL_OUT "LTTng modules not detected."
+}
+
+# Run the lttng binary.
+#
+# The first two arguments are stdout and stderr redirect paths, respectively.
+# The rest of the arguments are forwarded to the lttng binary
+function _run_lttng_cmd
+{
+	local stdout_dest="$1"
+	local stderr_dest="$2"
+	shift 2
+
+	diag "$TESTDIR/../src/bin/lttng/$LTTNG_BIN $*"
+	$TESTDIR/../src/bin/lttng/$LTTNG_BIN "$@" 1> "$stdout_dest" 2> "$stderr_dest"
 }
 
 function enable_kernel_lttng_event
@@ -155,7 +411,8 @@ function enable_kernel_lttng_event
 		chan="-c $channel_name"
 	fi
 
-	$TESTDIR/../src/bin/lttng/$LTTNG_BIN enable-event "$event_name" $chan -s $sess_name -k 1> $OUTPUT_DEST 2> $ERROR_OUTPUT_DEST
+	_run_lttng_cmd "$OUTPUT_DEST" "$ERROR_OUTPUT_DEST" \
+		enable-event "$event_name" $chan -s $sess_name -k
 	ret=$?
 	if [[ $expected_to_fail -eq "1" ]]; then
 		test $ret -ne "0"
@@ -210,7 +467,8 @@ 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 1> $OUTPUT_DEST 2> $ERROR_OUTPUT_DEST
+	_run_lttng_cmd "$OUTPUT_DEST" "$ERROR_OUTPUT_DEST" \
+		enable-event --syscall "$syscall_name" $chan -s $sess_name -k
 	ret=$?
 	if [[ $expected_to_fail -eq "1" ]]; then
 		test $ret -ne "0"
@@ -249,7 +507,8 @@ 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 1> $OUTPUT_DEST 2> $ERROR_OUTPUT_DEST
+	_run_lttng_cmd "$OUTPUT_DEST" "$ERROR_OUTPUT_DEST" \
+		disable-event --syscall "$syscall_name" $chan -s $sess_name -k
 
 	ret=$?
 	if [[ $expected_to_fail -eq "1" ]]; then
@@ -270,15 +529,73 @@ function lttng_disable_kernel_syscall_fail()
 	lttng_disable_kernel_syscall 1 "$@"
 }
 
+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 opt=$5
+	local opts="${@:5}"
 
-	$TESTDIR/../src/bin/lttng/$LTTNG_BIN enable-channel -k $channel_name -s $sess_name $opt 1> $OUTPUT_DEST 2> $ERROR_OUTPUT_DEST
+	_run_lttng_cmd "$OUTPUT_DEST" "$ERROR_OUTPUT_DEST" \
+		enable-channel -k $channel_name -s $sess_name $opts
 	ret=$?
 	if [[ $expected_to_fail -eq "1" ]]; then
 		test "$ret" -ne "0"
@@ -319,7 +636,8 @@ function lttng_disable_kernel_channel()
 	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> $ERROR_OUTPUT_DEST
+	_run_lttng_cmd "$OUTPUT_DEST" "$ERROR_OUTPUT_DEST" \
+		disable-channel -k $channel_name -s $sess_name
 	ret=$?
 	if [[ $expected_to_fail -eq "1" ]]; then
 		test "$ret" -ne "0"
@@ -342,77 +660,119 @@ function lttng_disable_kernel_channel_fail()
 function start_lttng_relayd_opt()
 {
 	local withtap=$1
-	local opt=$2
+	local process_mode=$2
+	local opt=$3
 
-	DIR=$(readlink -f $TESTDIR)
+	DIR=$(readlink -f "$TESTDIR")
 
-	if [ -z $(pgrep $RELAYD_MATCH) ]; then
-		$DIR/../src/bin/lttng-relayd/$RELAYD_BIN -b $opt 1> $OUTPUT_DEST 2> $ERROR_OUTPUT_DEST
-		#$DIR/../src/bin/lttng-relayd/$RELAYD_BIN $opt -vvv >>/tmp/relayd.log 2>&1 &
+	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 $process_mode $opt -vvv >>/tmp/relayd.log 2>&1 &
 		if [ $? -eq 1 ]; then
 			if [ $withtap -eq "1" ]; then
-				fail "Start lttng-relayd (opt: $opt)"
+				fail "Start lttng-relayd (process mode: $process_mode opt: $opt)"
 			fi
 			return 1
 		else
 			if [ $withtap -eq "1" ]; then
-				pass "Start lttng-relayd (opt: $opt)"
+				pass "Start lttng-relayd (process mode: $process_mode opt: $opt)"
 			fi
 		fi
 	else
 		pass "Start lttng-relayd (opt: $opt)"
 	fi
-
-	RELAYD_PIDS=$(pgrep $RELAYD_MATCH)
 }
 
 function start_lttng_relayd()
 {
-	start_lttng_relayd_opt 1 "$@"
+	start_lttng_relayd_opt 1 "-b" "$@"
 }
 
 function start_lttng_relayd_notap()
 {
-	start_lttng_relayd_opt 0 "$@"
+	start_lttng_relayd_opt 0 "-b" "$@"
 }
 
 function stop_lttng_relayd_opt()
 {
 	local withtap=$1
+	local is_cleanup=$2
+	local signal=$3
+	local timeout_s=$4
+	local dtimeleft_s=
+	local retval=0
+	local pids
 
-	if [ $withtap -eq "1" ]; then
-		diag "Killing lttng-relayd (pid: $RELAYD_PIDS)"
+	if [ -z "$signal" ]; then
+		signal="SIGTERM"
 	fi
-	kill $RELAYD_PIDS 1> $OUTPUT_DEST 2> $ERROR_OUTPUT_DEST
-	retval=$?
 
-	if [ $? -eq 1 ]; then
-		if [ $withtap -eq "1" ]; then
+
+	# Multiply time by 2 to simplify integer arithmetic
+	# Multiply time by 5 to adjust for sleeping every 0.1s
+	if [ -n "$timeout_s" ]; then
+		dtimeleft_s=$((timeout_s * 2 * 5))
+	fi
+
+
+	pids=$(lttng_pgrep "$RELAYD_MATCH")
+	if [ -z "$pids" ]; then
+		if [ "$is_cleanup" -eq 1 ]; then
+			:
+		elif [ "$withtap" -eq "1" ]; then
+			fail "No relay daemon to kill"
+		else
+			LTTNG_BAIL_OUT "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
-		return 1
 	else
 		out=1
 		while [ -n "$out" ]; do
-			out=$(pgrep $RELAYD_MATCH)
-			sleep 0.5
+			out=$(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 0.1
 		done
-		if [ $withtap -eq "1" ]; then
-			pass "Kill relay daemon"
+		if [ "$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
-	RELAYD_PIDS=""
 	return $retval
 }
 
 function stop_lttng_relayd()
 {
-	stop_lttng_relayd_opt 1 "$@"
+	stop_lttng_relayd_opt 1 0 "$@"
 }
 
 function stop_lttng_relayd_notap()
 {
-	stop_lttng_relayd_opt 0 "$@"
+	stop_lttng_relayd_opt 0 0 "$@"
+}
+
+function stop_lttng_relayd_cleanup()
+{
+	stop_lttng_relayd_opt 0 1 "$@"
 }
 
 #First arg: show tap output
@@ -422,16 +782,21 @@ 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=$(getconf LONG_BIT)
 
-	if [ -n $TEST_NO_SESSIOND ] && [ "$TEST_NO_SESSIOND" == "1" ]; then
+	local long_bit_value=
+	long_bit_value=$(getconf LONG_BIT)
+
+	if [ -n "$TEST_NO_SESSIOND" ] && [ "$TEST_NO_SESSIOND" == "1" ]; then
 		# Env variable requested no session daemon
 		return
 	fi
 
-	DIR=$(readlink -f $TESTDIR)
+	DIR=$(readlink -f "$TESTDIR")
 
 	# Get long_bit value for 32/64 consumerd
 	case "$long_bit_value" in
@@ -448,32 +813,36 @@ function start_lttng_sessiond_opt()
 
 	# 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}
+		env_vars="${LTTNG_SESSIOND_ENV_VARS} "
 	fi
+	env_vars="${env_vars}$DIR/../src/bin/lttng-sessiond/$SESSIOND_BIN"
 
-	validate_kernel_version
-	if [ $? -ne 0 ]; then
+	if ! validate_kernel_version; then
 	    fail "Start session daemon"
-	    BAIL_OUT "*** Kernel too old for session daemon tests ***"
+	    LTTNG_BAIL_OUT "*** Kernel too old for session daemon tests ***"
 	fi
 
-	: ${LTTNG_SESSION_CONFIG_XSD_PATH=${DIR}/../src/common/config/}
+	diag "export LTTNG_SESSION_CONFIG_XSD_PATH=${DIR}/../src/common/"
+	: "${LTTNG_SESSION_CONFIG_XSD_PATH="${DIR}/../src/common/"}"
 	export LTTNG_SESSION_CONFIG_XSD_PATH
 
-	if [ -z $(pgrep ${SESSIOND_MATCH}) ]; then
+	if [ -z "$(lttng_pgrep "${SESSIOND_MATCH}")" ]; then
 		# Have a load path ?
 		if [ -n "$load_path" ]; then
-			env $env_vars $DIR/../src/bin/lttng-sessiond/$SESSIOND_BIN --load "$load_path" --background $consumerd
+			diag "env $env_vars --load $load_path --background $consumerd $@"
+			# shellcheck disable=SC2086
+			env $env_vars --load "$load_path" --background "$consumerd" "$@"
 		else
-			env $env_vars $DIR/../src/bin/lttng-sessiond/$SESSIOND_BIN --background $consumerd
+			diag "env $env_vars --background $consumerd $@"
+			# shellcheck disable=SC2086
+			env $env_vars --background "$consumerd" "$@"
 		fi
 		#$DIR/../src/bin/lttng-sessiond/$SESSIOND_BIN --background --consumerd32-path="$DIR/../src/bin/lttng-consumerd/lttng-consumerd" --consumerd64-path="$DIR/../src/bin/lttng-consumerd/lttng-consumerd" --verbose-consumer >>/tmp/sessiond.log 2>&1
 		status=$?
-		if [ $withtap -eq "1" ]; then
+		if [ "$withtap" -eq "1" ]; then
 			ok $status "Start session daemon"
 		fi
 	fi
-	SESSIOND_PIDS=$(pgrep $SESSIOND_MATCH)
 }
 
 function start_lttng_sessiond()
@@ -489,98 +858,158 @@ function start_lttng_sessiond_notap()
 function stop_lttng_sessiond_opt()
 {
 	local withtap=$1
-	local signal=$2
-	local kill_opt=""
+	local is_cleanup=$2
+	local signal=$3
+	local timeout_s=$4
+	local dtimeleft_s=
+	local retval=0
+	local runas_pids
+	local pids
+
+	if [ -z "$signal" ]; then
+		signal=SIGTERM
+	fi
+
+	# Multiply time by 2 to simplify integer arithmetic
+	# Multiply time by 5 to adjust for sleeping every 0.1s
+	if [ -n "$timeout_s" ]; then
+		dtimeleft_s=$((timeout_s * 2 * 5))
+	fi
 
-	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
+		return 0
 	fi
 
-	local pids="${SESSIOND_PIDS} $(pgrep $RUNAS_MATCH)"
+	runas_pids=$(lttng_pgrep "$RUNAS_MATCH")
+	pids=$(lttng_pgrep "$SESSIOND_MATCH")
 
-	if [ -n "$2" ]; then
-		kill_opt="$kill_opt -s $signal"
+	if [ -n "$runas_pids" ]; then
+		pids="$pids $runas_pids"
 	fi
-	if [ $withtap -eq "1" ]; then
-		diag "Killing $SESSIOND_BIN and lt-$SESSIOND_BIN pids: $(echo $pids | tr '\n' ' ')"
+
+	if [ -z "$pids" ]; then
+		if [ "$is_cleanup" -eq 1 ]; then
+			:
+		elif [ "$withtap" -eq "1" ]; then
+			fail "No session daemon to kill"
+		else
+			LTTNG_BAIL_OUT "No session daemon to kill"
+		fi
+		return 0
 	fi
-	kill $kill_opt $pids 1> $OUTPUT_DEST 2> $ERROR_OUTPUT_DEST
 
-	if [ $? -eq 1 ]; then
-		if [ $withtap -eq "1" ]; then
+	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 "$out" ]; do
-			out=$(pgrep ${SESSIOND_MATCH})
-			sleep 0.5
+			out=$(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 0.1
 		done
 		out=1
 		while [ -n "$out" ]; do
-			out=$(pgrep $CONSUMERD_MATCH)
-			sleep 0.5
+			out=$(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 0.1
 		done
 
-		SESSIOND_PIDS=""
-		if [ $withtap -eq "1" ]; then
-			pass "Kill session daemon"
+		if [ "$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 stop_lttng_sessiond()
 {
-	stop_lttng_sessiond_opt 1 "$@"
+	stop_lttng_sessiond_opt 1 0 "$@"
 }
 
 function stop_lttng_sessiond_notap()
 {
-	stop_lttng_sessiond_opt 0 "$@"
+	stop_lttng_sessiond_opt 0 0 "$@"
+}
+
+function stop_lttng_sessiond_cleanup()
+{
+	stop_lttng_sessiond_opt 0 1 "$@"
 }
 
 function sigstop_lttng_sessiond_opt()
 {
 	local withtap=$1
 	local signal=SIGSTOP
-	local kill_opt=""
+	local pids
 
-	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
 
-	PID_SESSIOND="$(pgrep ${SESSIOND_MATCH}) $(pgrep $RUNAS_MATCH)"
-
-	kill_opt="$kill_opt -s $signal"
+	pids="$(lttng_pgrep "${SESSIOND_MATCH}") $(lttng_pgrep "$RUNAS_MATCH")"
 
-	if [ $withtap -eq "1" ]; then
-		diag "Sending SIGSTOP to lt-$SESSIOND_BIN and $SESSIOND_BIN pids: $(echo $PID_SESSIOND | tr '\n' ' ')"
+	if [ "$withtap" -eq "1" ]; then
+		diag "Sending SIGSTOP to lt-$SESSIOND_BIN and $SESSIOND_BIN pids: $(echo "$pids" | tr '\n' ' ')"
 	fi
-	kill $kill_opt $PID_SESSIOND 1> $OUTPUT_DEST 2> $ERROR_OUTPUT_DEST
 
-	if [ $? -eq 1 ]; then
-		if [ $withtap -eq "1" ]; then
+	# shellcheck disable=SC2086
+	if ! kill -s $signal $pids 1> $OUTPUT_DEST 2> $ERROR_OUTPUT_DEST; then
+		if [ "$withtap" -eq "1" ]; then
 			fail "Sending SIGSTOP to session daemon"
 		fi
 	else
 		out=1
 		while [ $out -ne 0 ]; do
-			pid=$(pgrep $SESSIOND_MATCH)
+			pids="$(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= )
+			for sessiond_pid in $pids; do
+				state="$(ps -p "$sessiond_pid" -o state= )"
 				if [[ -n "$state" && "$state" != "T" ]]; then
 					out=1
 				fi
 			done
 			sleep 0.5
 		done
-		if [ $withtap -eq "1" ]; then
+		if [ "$withtap" -eq "1" ]; then
 			pass "Sending SIGSTOP to session daemon"
 		fi
 	fi
@@ -599,99 +1028,130 @@ function sigstop_lttng_sessiond_notap()
 function stop_lttng_consumerd_opt()
 {
 	local withtap=$1
-	local signal=$2
-	local kill_opt=""
+	local is_cleanup=$2
+	local signal=$3
+	local timeout_s=$4
+	local dtimeleft_s=
+	local retval=0
+	local pids
 
-	PID_CONSUMERD=$(pgrep $CONSUMERD_MATCH)
+	if [ -z "$signal" ]; then
+		signal=SIGTERM
+	fi
 
-	if [ -n "$2" ]; then
-		kill_opt="$kill_opt -s $signal"
+	# Multiply time by 2 to simplify integer arithmetic
+	# Multiply time by 5 to adjust for sleeping every 0.1s
+	if [ -n "$timeout_s" ]; then
+		dtimeleft_s=$((timeout_s * 2 * 5))
 	fi
 
-	if [ $withtap -eq "1" ]; then
-		diag "Killing $CONSUMERD_BIN pids: $(echo $PID_CONSUMERD | tr '\n' ' ')"
+	pids="$(lttng_pgrep "$CONSUMERD_MATCH")"
+
+	if [ -z "$pids" ]; then
+		if [ "$is_cleanup" -eq 1 ]; then
+			:
+		elif [ "$withtap" -eq "1" ]; then
+			fail "No consumerd daemon to kill"
+		else
+			LTTNG_BAIL_OUT "No consumerd daemon to kill"
+		fi
+		return 0
 	fi
-	kill $kill_opt $PID_CONSUMERD 1> $OUTPUT_DEST 2> $ERROR_OUTPUT_DEST
-	retval=$?
-	set +x
 
-	if [ $? -eq 1 ]; then
-		if [ $withtap -eq "1" ]; then
+	diag "Killing (signal $signal) $CONSUMERD_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 consumer daemon"
 		fi
-		return 1
 	else
 		out=1
 		while [ $out -ne 0 ]; do
-			pid=$(pgrep $CONSUMERD_MATCH)
+			pids="$(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= )
+			for consumer_pid in $pids; do
+				state="$(ps -p "$consumer_pid" -o state= )"
 				if [[ -n "$state" && "$state" != "Z" ]]; then
 					out=1
 				fi
 			done
-			sleep 0.5
+			if [ -n "$dtimeleft_s" ]; then
+				if [ $dtimeleft_s -lt 0 ]; then
+					out=0
+					retval=1
+				fi
+				dtimeleft_s=$((dtimeleft_s - 1))
+			fi
+			sleep 0.1
 		done
-		if [ $withtap -eq "1" ]; then
-			pass "Kill consumer daemon"
+		if [ "$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 "$@"
+	stop_lttng_consumerd_opt 1 0 "$@"
 }
 
 function stop_lttng_consumerd_notap()
 {
-	stop_lttng_consumerd_opt 0 "$@"
+	stop_lttng_consumerd_opt 0 0 "$@"
+}
+
+function stop_lttng_consumerd_cleanup()
+{
+	stop_lttng_consumerd_opt 0 1 "$@"
 }
 
 function sigstop_lttng_consumerd_opt()
 {
 	local withtap=$1
 	local signal=SIGSTOP
-	local kill_opt=""
+	local pids
 
-	PID_CONSUMERD=$(pgrep $CONSUMERD_MATCH)
+	pids="$(lttng_pgrep "$CONSUMERD_MATCH")"
 
-	kill_opt="$kill_opt -s $signal"
+	diag "Sending SIGSTOP to $CONSUMERD_BIN pids: $(echo "$pids" | tr '\n' ' ')"
 
-	if [ $withtap -eq "1" ]; then
-		diag "Sending SIGSTOP to $CONSUMERD_BIN pids: $(echo $PID_CONSUMERD | tr '\n' ' ')"
-	fi
-	kill $kill_opt $PID_CONSUMERD 1> $OUTPUT_DEST 2> $ERROR_OUTPUT_DEST
+	# shellcheck disable=SC2086
+	kill -s $signal $pids 1> $OUTPUT_DEST 2> $ERROR_OUTPUT_DEST
 	retval=$?
-	set +x
 
-	if [ $? -eq 1 ]; then
-		if [ $withtap -eq "1" ]; then
+	if [ $retval -eq 1 ]; then
+		if [ "$withtap" -eq "1" ]; then
 			fail "Sending SIGSTOP to consumer daemon"
 		fi
 		return 1
 	else
 		out=1
 		while [ $out -ne 0 ]; do
-			pid=$(pgrep $CONSUMERD_MATCH)
+			pids="$(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= )
+			for consumer_pid in $pids; do
+				state="$(ps -p "$consumer_pid" -o state= )"
 				if [[ -n "$state" && "$state" != "T" ]]; then
 					out=1
 				fi
 			done
 			sleep 0.5
 		done
-		if [ $withtap -eq "1" ]; then
+		if [ "$withtap" -eq "1" ]; then
 			pass "Sending SIGSTOP to consumer daemon"
 		fi
 	fi
@@ -710,16 +1170,35 @@ function sigstop_lttng_consumerd_notap()
 
 function list_lttng_with_opts ()
 {
+	local ret
+	local withtap=$1
+	shift
 	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 $opts"
+	_run_lttng_cmd "$OUTPUT_DEST" "$ERROR_OUTPUT_DEST" \
+		list $opts
+	ret=$?
+	if [ $withtap -eq "1" ]; then
+		ok $ret "Lttng-tool list command with option $opts"
+	fi
+}
+
+function list_lttng_ok ()
+{
+	list_lttng_with_opts 1 "$@"
+}
+
+function list_lttng_notap ()
+{
+	list_lttng_with_opts 0 "$@"
 }
 
 function create_lttng_session_no_output ()
 {
 	local sess_name=$1
+	local opts="${@:2}"
 
-	$TESTDIR/../src/bin/lttng/$LTTNG_BIN create $sess_name --no-output 1> $OUTPUT_DEST 2> $ERROR_OUTPUT_DEST
+	_run_lttng_cmd "$OUTPUT_DEST" "$ERROR_OUTPUT_DEST" \
+		create $sess_name --no-output $opts
 	ok $? "Create session $sess_name in no-output mode"
 }
 
@@ -728,7 +1207,8 @@ function create_lttng_session_uri () {
 	local uri=$2
 	local opts="${@:3}"
 
-	$TESTDIR/../src/bin/lttng/$LTTNG_BIN create $sess_name -U $uri $opts 1> $OUTPUT_DEST 2> $ERROR_OUTPUT_DEST
+	_run_lttng_cmd "$OUTPUT_DEST" "$ERROR_OUTPUT_DEST" \
+		create $sess_name -U $uri $opts
 	ok $? "Create session $sess_name with uri:$uri and opts: $opts"
 }
 
@@ -740,7 +1220,15 @@ function create_lttng_session ()
 	local trace_path=$4
 	local opt=$5
 
-	$TESTDIR/../src/bin/lttng/$LTTNG_BIN create $sess_name -o $trace_path $opt > $OUTPUT_DEST
+	if [ -z "$trace_path" ]; then
+		# Use lttng-sessiond default output.
+		trace_path=""
+	else
+		trace_path="-o $trace_path"
+	fi
+
+	_run_lttng_cmd "$OUTPUT_DEST" "$ERROR_OUTPUT_DEST" \
+		create "$sess_name" $trace_path $opt
 	ret=$?
 	if [ $expected_to_fail -eq "1" ]; then
 		test "$ret" -ne "0"
@@ -778,9 +1266,10 @@ function enable_ust_lttng_channel ()
 	local expected_to_fail=$2
 	local sess_name=$3
 	local channel_name=$4
-	local opt=$5
+	local opts="${@:5}"
 
-	$TESTDIR/../src/bin/lttng/$LTTNG_BIN enable-channel -u $channel_name -s $sess_name $opt 1> $OUTPUT_DEST 2> $ERROR_OUTPUT_DEST
+	_run_lttng_cmd "$OUTPUT_DEST" "$ERROR_OUTPUT_DEST" \
+		enable-channel -u $channel_name -s $sess_name $opts
 	ret=$?
 	if [[ $expected_to_fail -eq "1" ]]; then
 		test "$ret" -ne "0"
@@ -816,7 +1305,8 @@ 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> $ERROR_OUTPUT_DEST
+	_run_lttng_cmd "$OUTPUT_DEST" "$ERROR_OUTPUT_DEST" \
+		disable-channel -u $channel_name -s $sess_name
 	ok $? "Disable channel $channel_name for session $sess_name"
 }
 
@@ -825,7 +1315,8 @@ 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> $ERROR_OUTPUT_DEST
+	_run_lttng_cmd "$OUTPUT_DEST" "$ERROR_OUTPUT_DEST" \
+		enable-channel -s $sess_name $channel_name -k --output mmap --overwrite
 	ok $? "Enable channel $channel_name for session $sess_name"
 }
 
@@ -834,7 +1325,8 @@ 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> $ERROR_OUTPUT_DEST
+	_run_lttng_cmd "$OUTPUT_DEST" "$ERROR_OUTPUT_DEST" \
+		enable-channel -s $sess_name $channel_name -k --output mmap --discard --subbuf-size=$(getconf PAGE_SIZE) --num-subbuf=2
 	ok $? "Enable small discard channel $channel_name for session $sess_name"
 }
 
@@ -843,7 +1335,8 @@ 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> $ERROR_OUTPUT_DEST
+	_run_lttng_cmd "$OUTPUT_DEST" "$ERROR_OUTPUT_DEST" \
+		enable-channel -s $sess_name $channel_name -k --output mmap --overwrite --subbuf-size=$(getconf PAGE_SIZE) --num-subbuf=2
 	ok $? "Enable small discard channel $channel_name for session $sess_name"
 }
 
@@ -852,7 +1345,8 @@ 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> $ERROR_OUTPUT_DEST
+	_run_lttng_cmd "$OUTPUT_DEST" "$ERROR_OUTPUT_DEST" \
+		enable-channel -s $sess_name $channel_name -u --output mmap --overwrite
 	ok $? "Enable channel $channel_name for session $sess_name"
 }
 
@@ -871,7 +1365,8 @@ function enable_ust_lttng_event ()
 		chan="-c $channel_name"
 	fi
 
-	$TESTDIR/../src/bin/lttng/$LTTNG_BIN enable-event "$event_name" $chan -s $sess_name -u 1> $OUTPUT_DEST 2> $ERROR_OUTPUT_DEST
+	_run_lttng_cmd "$OUTPUT_DEST" "$ERROR_OUTPUT_DEST" \
+		enable-event "$event_name" $chan -s "$sess_name" -u
 	ret=$?
 	if [[ $expected_to_fail -eq "1" ]]; then
 		test $ret -ne "0"
@@ -915,7 +1410,8 @@ 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 1> $OUTPUT_DEST 2> $ERROR_OUTPUT_DEST
+	_run_lttng_cmd "$OUTPUT_DEST" "$ERROR_OUTPUT_DEST" \
+		enable-event "$event_name" $chan -s $sess_name -j
 	ok $? "Enable JUL event $event_name for session $sess_name"
 }
 
@@ -933,43 +1429,87 @@ 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 1> $OUTPUT_DEST 2> $ERROR_OUTPUT_DEST
+	_run_lttng_cmd "$OUTPUT_DEST" "$ERROR_OUTPUT_DEST" \
+		enable-event --loglevel $loglevel "$event_name" $chan -s $sess_name -j
 	ok $? "Enable JUL event $event_name for session $sess_name with loglevel $loglevel"
 }
 
 function enable_log4j_lttng_event()
 {
-	sess_name=$1
-	event_name="$2"
-	channel_name=$3
+	local sess_name=$1
+	local event_name=$2
+	local channel_name=$3
 
-	if [ -z $channel_name ]; then
-		# default channel if none specified
-		chan=""
-	else
-		chan="-c $channel_name"
+	local chan_opt=()
+
+	# default channel if none specified
+	if [ -n "$channel_name" ]; then
+		chan_opt=("-c" "$channel_name")
 	fi
 
-	$TESTDIR/../src/bin/lttng/$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 $sess_name"
+	_run_lttng_cmd "$OUTPUT_DEST" "$ERROR_OUTPUT_DEST" \
+		enable-event "$event_name" "${chan_opt[@]}" -s "$sess_name" --log4j
+	ok $? "Enable LOG4J event '$event_name' for session '$sess_name'"
+}
+
+function enable_log4j_lttng_event_filter()
+{
+	local sess_name=$1
+	local event_name=$2
+	local filter=$3
+
+	_run_lttng_cmd "$OUTPUT_DEST" "$ERROR_OUTPUT_DEST" \
+		enable-event "$event_name" -s "$sess_name" --log4j --filter "$filter"
+	ok $? "Enable LOG4J event '$event_name' with filter '$filter' for session '$sess_name'"
+}
+
+function enable_log4j_lttng_event_filter_loglevel_only()
+{
+	local sess_name=$1
+	local event_name=$2
+	local filter=$3
+	local loglevel=$4
+
+	_run_lttng_cmd "$OUTPUT_DEST" "$ERROR_OUTPUT_DEST" \
+		enable-event --loglevel-only "$loglevel" "$event_name" -s "$sess_name" -l --filter "$filter"
+	ok $? "Enable LOG4J event '$event_name' with filter '$filter' and loglevel-only '$loglevel' for session '$sess_name'"
 }
 
 function enable_log4j_lttng_event_loglevel()
 {
 	local sess_name=$1
-	local event_name="$2"
+	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 $channel_name"
+
+	# default channel if none specified
+	if [ -n "$channel_name" ]; then
+		chan_opt=("-c" "$channel_name")
 	fi
 
-	$TESTDIR/../src/bin/lttng/$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 $loglevel"
+	_run_lttng_cmd "$OUTPUT_DEST" "$ERROR_OUTPUT_DEST" \
+		enable-event --loglevel "$loglevel" "$event_name" "${chan_opt[@]}" -s "$sess_name" --log4j
+	ok $? "Enable LOG4J event '$event_name' for session '$sess_name' with loglevel '$loglevel'"
+}
+
+function enable_log4j_lttng_event_loglevel_only()
+{
+	local sess_name=$1
+	local event_name=$2
+	local loglevel=$3
+	local channel_name=$4
+
+	local chan_opt=()
+
+	# default channel if none specified
+	if [ -n "$channel_name" ]; then
+		chan_opt=("-c" "$channel_name")
+	fi
+
+	_run_lttng_cmd "$OUTPUT_DEST" "$ERROR_OUTPUT_DEST" \
+		enable-event --loglevel-only "$loglevel" "$event_name" "${chan_opt[@]}" -s "$sess_name" --log4j
+	ok $? "Enable LOG4J event '$event_name' for session '$sess_name' with loglevel-only '$loglevel'"
 }
 
 function enable_python_lttng_event()
@@ -985,7 +1525,8 @@ function enable_python_lttng_event()
 		chan="-c $channel_name"
 	fi
 
-	$TESTDIR/../src/bin/lttng/$LTTNG_BIN enable-event "$event_name" $chan -s $sess_name -p 1> $OUTPUT_DEST 2> $ERROR_OUTPUT_DEST
+	_run_lttng_cmd "$OUTPUT_DEST" "$ERROR_OUTPUT_DEST" \
+		enable-event "$event_name" $chan -s $sess_name -p
 	ok $? "Enable Python event $event_name for session $sess_name"
 }
 
@@ -1003,7 +1544,8 @@ function enable_python_lttng_event_loglevel()
 		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> $ERROR_OUTPUT_DEST
+	_run_lttng_cmd "$OUTPUT_DEST" "$ERROR_OUTPUT_DEST" \
+		enable-event --loglevel $loglevel "$event_name" $chan -s $sess_name -p
 	ok $? "Enable Python event $event_name for session $sess_name with loglevel $loglevel"
 }
 
@@ -1012,8 +1554,17 @@ function enable_ust_lttng_event_filter()
 	local sess_name="$1"
 	local event_name="$2"
 	local filter="$3"
+	local channel_name=$4
 
-	$TESTDIR/../src/bin/lttng/$LTTNG_BIN enable-event "$event_name" -s $sess_name -u --filter "$filter" 1> $OUTPUT_DEST 2> $ERROR_OUTPUT_DEST
+	if [ -z $channel_name ]; then
+		# default channel if none specified
+		chan=""
+	else
+		chan="-c $channel_name"
+	fi
+
+	_run_lttng_cmd "$OUTPUT_DEST" "$ERROR_OUTPUT_DEST" \
+		enable-event $chan "$event_name" -s $sess_name -u --filter "$filter"
 	ok $? "Enable event $event_name with filtering for session $sess_name"
 }
 
@@ -1022,8 +1573,14 @@ function enable_ust_lttng_event_loglevel()
 	local sess_name="$1"
 	local event_name="$2"
 	local loglevel="$3"
+	local channel_name="$4"
+	local chan=()
+	if [ -n "${channel_name}" ] ; then
+		chan=('-c' "${channel_name}")
+	fi
 
-	$TESTDIR/../src/bin/lttng/$LTTNG_BIN enable-event "$event_name" -s $sess_name -u --loglevel $loglevel 1> $OUTPUT_DEST 2> $ERROR_OUTPUT_DEST
+	_run_lttng_cmd "$OUTPUT_DEST" "$ERROR_OUTPUT_DEST" \
+		enable-event "${chan[@]}" "$event_name" -s "${sess_name}" -u --loglevel="${loglevel}"
 	ok $? "Enable event $event_name with loglevel $loglevel"
 }
 
@@ -1032,8 +1589,14 @@ function enable_ust_lttng_event_loglevel_only()
 	local sess_name="$1"
 	local event_name="$2"
 	local loglevel="$3"
+	local channel_name="$4"
+	local chan=()
+	if [ -n "${channel_name}" ] ; then
+		chan=('-c' "${channel_name}")
+	fi
 
-	$TESTDIR/../src/bin/lttng/$LTTNG_BIN enable-event "$event_name" -s $sess_name -u --loglevel-only $loglevel 1> $OUTPUT_DEST 2> $ERROR_OUTPUT_DEST
+	_run_lttng_cmd "$OUTPUT_DEST" "$ERROR_OUTPUT_DEST" \
+		enable-event "${chan[@]}" "$event_name" -s "${sess_name}" -u --loglevel-only "${loglevel}"
 	ok $? "Enable event $event_name with loglevel-only $loglevel"
 }
 
@@ -1050,7 +1613,8 @@ 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 1> $OUTPUT_DEST 2> $ERROR_OUTPUT_DEST
+	_run_lttng_cmd "$OUTPUT_DEST" "$ERROR_OUTPUT_DEST" \
+		disable-event "$event_name" -s $sess_name $chan -u
 	ok $? "Disable event $event_name for session $sess_name"
 }
 
@@ -1068,8 +1632,9 @@ function disable_log4j_lttng_event ()
 	local sess_name="$1"
 	local event_name="$2"
 
-	$TESTDIR/../src/bin/lttng/$LTTNG_BIN disable-event "$event_name" -s $sess_name -l >/dev/null 2>&1
-	ok $? "Disable LOG4J event $event_name for session $sess_name"
+	_run_lttng_cmd "$OUTPUT_DEST" "$ERROR_OUTPUT_DEST" \
+		disable-event "$event_name" -s "$sess_name" --log4j
+	ok $? "Disable LOG4J event '$event_name' for session '$sess_name'"
 }
 
 function disable_python_lttng_event ()
@@ -1077,58 +1642,83 @@ function disable_python_lttng_event ()
 	local sess_name="$1"
 	local event_name="$2"
 
-	$TESTDIR/../src/bin/lttng/$LTTNG_BIN disable-event "$event_name" -s $sess_name -p 1> $OUTPUT_DEST 2> $ERROR_OUTPUT_DEST
+	_run_lttng_cmd "$OUTPUT_DEST" "$ERROR_OUTPUT_DEST" \
+		disable-event "$event_name" -s $sess_name -p
 	ok $? "Disable Python event $event_name for session $sess_name"
 }
 
-function start_lttng_tracing ()
+function start_lttng_tracing_opt ()
 {
-	local expected_to_fail=$1
-	local sess_name=$2
+	local withtap=$1
+	local expected_to_fail=$2
+	local sess_name=$3
 
-	$TESTDIR/../src/bin/lttng/$LTTNG_BIN start $sess_name 1> $OUTPUT_DEST 2> $ERROR_OUTPUT_DEST
+	_run_lttng_cmd "$OUTPUT_DEST" "$ERROR_OUTPUT_DEST" \
+		start $sess_name
 	ret=$?
 	if [[ $expected_to_fail -eq "1" ]]; then
 		test "$ret" -ne "0"
-		ok $? "Start tracing for session $sess_name failed as expected"
+		ret=$?
+		if [ $withtap -eq "1" ]; then
+			ok $? "Start tracing for session $sess_name failed as expected"
+		fi
 	else
-		ok $ret "Start tracing for session $sess_name"
+		if [ $withtap -eq "1" ]; then
+			ok $ret "Start tracing for session $sess_name"
+		fi
 	fi
 }
 
 function start_lttng_tracing_ok ()
 {
-	start_lttng_tracing 0 "$@"
+	start_lttng_tracing_opt 1 0 "$@"
 }
 
 function start_lttng_tracing_fail ()
 {
-	start_lttng_tracing 1 "$@"
+	start_lttng_tracing_opt 1 1 "$@"
 }
 
-function stop_lttng_tracing ()
+function start_lttng_tracing_notap ()
 {
-	local expected_to_fail=$1
-	local sess_name=$2
+	start_lttng_tracing_opt 0 1 "$@"
+}
+
+function stop_lttng_tracing_opt ()
+{
+	local withtap=$1
+	local expected_to_fail=$2
+	local sess_name=$3
 
-	$TESTDIR/../src/bin/lttng/$LTTNG_BIN stop $sess_name 1> $OUTPUT_DEST 2> $ERROR_OUTPUT_DEST
+	_run_lttng_cmd "$OUTPUT_DEST" "$ERROR_OUTPUT_DEST" \
+		stop $sess_name
 	ret=$?
 	if [[ $expected_to_fail -eq "1" ]]; then
 		test "$ret" -ne "0"
-		ok $? "Stop lttng tracing for session $sess_name failed as expected"
+		ret=$?
+		if [ $withtap -eq "1" ]; then
+			ok $? "Stop lttng 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 "Stop lttng tracing for session $sess_name"
+		fi
 	fi
 }
 
 function stop_lttng_tracing_ok ()
 {
-	stop_lttng_tracing 0 "$@"
+	stop_lttng_tracing_opt 1 0 "$@"
 }
 
 function stop_lttng_tracing_fail ()
 {
-	stop_lttng_tracing 1 "$@"
+	stop_lttng_tracing_opt 1 1 "$@"
+}
+
+function stop_lttng_tracing_notap ()
+{
+	stop_lttng_tracing_opt 0 0 "$@"
 }
 
 function destroy_lttng_session ()
@@ -1136,8 +1726,10 @@ function destroy_lttng_session ()
 	local withtap=$1
 	local expected_to_fail=$2
 	local sess_name=$3
+	shift 3
 
-	$TESTDIR/../src/bin/lttng/$LTTNG_BIN destroy $sess_name 1> $OUTPUT_DEST 2> $ERROR_OUTPUT_DEST
+	_run_lttng_cmd "$OUTPUT_DEST" "$ERROR_OUTPUT_DEST" \
+		destroy $sess_name $@
 	ret=$?
 	if [[ $expected_to_fail -eq "1" ]]; then
 		test "$ret" -ne "0"
@@ -1170,7 +1762,8 @@ function destroy_lttng_session_notap ()
 
 function destroy_lttng_sessions ()
 {
-	$TESTDIR/../src/bin/lttng/$LTTNG_BIN destroy --all 1> $OUTPUT_DEST 2> $ERROR_OUTPUT_DEST
+	_run_lttng_cmd "$OUTPUT_DEST" "$ERROR_OUTPUT_DEST" \
+		destroy --all
 	ok $? "Destroy all lttng sessions"
 }
 
@@ -1179,14 +1772,16 @@ 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 $sess_name file://$trace_path 1> $OUTPUT_DEST 2> $ERROR_OUTPUT_DEST
+	_run_lttng_cmd "$OUTPUT_DEST" "$ERROR_OUTPUT_DEST" \
+		snapshot add-output -s $sess_name $trace_path $opts
 	ret=$?
 	if [[ $expected_to_fail -eq 1 ]]; then
 		test "$ret" -ne "0"
-		ok $? "Added snapshot output file://$trace_path failed as expected"
+		ok $? "Added snapshot output $trace_path failed as expected"
 	else
-		ok $ret "Added snapshot output file://$trace_path"
+		ok $ret "Added snapshot output $trace_path"
 	fi
 }
 
@@ -1206,7 +1801,8 @@ function lttng_snapshot_del_output ()
 	local sess_name=$2
 	local id=$3
 
-	$TESTDIR/../src/bin/lttng/$LTTNG_BIN snapshot del-output -s $sess_name $id 1> $OUTPUT_DEST 2> $ERROR_OUTPUT_DEST
+	_run_lttng_cmd "$OUTPUT_DEST" "$ERROR_OUTPUT_DEST" \
+		snapshot del-output -s $sess_name $id
 	ret=$?
 	if [[ $expected_to_fail -eq "1" ]]; then
 		test "$ret" -ne "0"
@@ -1231,14 +1827,16 @@ function lttng_snapshot_record ()
 	local sess_name=$1
 	local trace_path=$2
 
-	$TESTDIR/../src/bin/lttng/$LTTNG_BIN snapshot record -s $sess_name 1> $OUTPUT_DEST 2> $ERROR_OUTPUT_DEST
+	_run_lttng_cmd "$OUTPUT_DEST" "$ERROR_OUTPUT_DEST" \
+		snapshot record -s "$sess_name" "$trace_path"
 	ok $? "Snapshot recorded"
 }
 
 function lttng_snapshot_list ()
 {
 	local sess_name=$1
-	$TESTDIR/../src/bin/lttng/$LTTNG_BIN snapshot list-output -s $sess_name 1> $OUTPUT_DEST 2> $ERROR_OUTPUT_DEST
+	_run_lttng_cmd "$OUTPUT_DEST" "$ERROR_OUTPUT_DEST" \
+		snapshot list-output -s $sess_name
 	ok $? "Snapshot list"
 }
 
@@ -1247,7 +1845,8 @@ function lttng_save()
 	local sess_name=$1
 	local opts=$2
 
-	$TESTDIR/../src/bin/lttng/$LTTNG_BIN save $sess_name $opts 1> $OUTPUT_DEST 2> $ERROR_OUTPUT_DEST
+	_run_lttng_cmd "$OUTPUT_DEST" "$ERROR_OUTPUT_DEST" \
+		save $sess_name $opts
 	ok $? "Session saved"
 }
 
@@ -1256,7 +1855,8 @@ function lttng_load()
 	local expected_to_fail=$1
 	local opts=$2
 
-	$TESTDIR/../src/bin/lttng/$LTTNG_BIN load $opts 1> $OUTPUT_DEST 2> $ERROR_OUTPUT_DEST
+	_run_lttng_cmd "$OUTPUT_DEST" "$ERROR_OUTPUT_DEST" \
+		load $opts
 	ret=$?
 	if [[ $expected_to_fail -eq "1" ]]; then
 		test $ret -ne "0"
@@ -1278,8 +1878,9 @@ function lttng_load_fail()
 
 function lttng_track()
 {
-	local expected_to_fail=$1
-	local opts=$2
+	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
@@ -1302,8 +1903,9 @@ function lttng_track_fail()
 
 function lttng_untrack()
 {
-	local expected_to_fail=$1
-	local opts=$2
+	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
@@ -1337,9 +1939,50 @@ function lttng_untrack_kernel_all_ok()
 	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> $ERROR_OUTPUT_DEST
+	_run_lttng_cmd "$OUTPUT_DEST" "$ERROR_OUTPUT_DEST" \
+		add-context --list
 	ret=$?
 	ok $ret "Context listing"
 }
@@ -1352,7 +1995,8 @@ function add_context_lttng()
 	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> $ERROR_OUTPUT_DEST
+	_run_lttng_cmd "$OUTPUT_DEST" "$ERROR_OUTPUT_DEST" \
+		add-context -s $session_name -c $channel_name -t $type $domain 
 	ret=$?
 	if [[ $expected_to_fail -eq "1" ]]; then
 		test $ret -ne "0"
@@ -1382,177 +2026,276 @@ function add_context_kernel_fail()
 	add_context_lttng 1 -k "$@"
 }
 
-function trace_matches ()
+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 0.1
+	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 0.1
+	done
+	pass "Waiting for live viewers on url: $url"
+}
+
+function bail_out_if_no_babeltrace()
+{
+	which "$BABELTRACE_BIN" >/dev/null
+	if [ $? -ne 0 ]; then
+		LTTNG_BAIL_OUT "\"$BABELTRACE_BIN\" binary not found. Skipping tests"
+	fi
+}
+
+# Check that the trace metadata contains '$expected' event ids matching '$event_name'.
+function validate_metadata_event()
 {
 	local event_name=$1
-	local nr_iter=$2
+	local expected=$2
 	local trace_path=$3
 
-	which $BABELTRACE_BIN >/dev/null
-	skip $? -ne 0 "Babeltrace binary not found. Skipping trace matches"
+	local metadata_file
+	local metadata_path
+	local count
 
-	local count=$($BABELTRACE_BIN $trace_path | grep $event_name | wc -l)
+	metadata_file=$(find "$trace_path" -name "metadata")
+	metadata_path=$(dirname "$metadata_file")
 
-	if [ "$count" -ne "$nr_iter" ]; then
-		fail "Trace match"
-		diag "$count matching events found in trace"
-	else
-		pass "Trace match"
-	fi
+	bail_out_if_no_babeltrace
+
+	count=$($BABELTRACE_BIN --output-format=ctf-metadata "$metadata_path" | grep -c "$event_name")
+
+	test "$count" -eq "$expected"
+	ok $? "Found $count / $expected metadata event id matching '$event_name'"
 }
 
-function trace_match_only()
+# Check that the trace contains '$expected' events matching '$event_name', other
+# events not matching '$event_name' can be present.
+function trace_matches()
 {
 	local event_name=$1
-	local nr_iter=$2
+	local expected=$2
 	local trace_path=$3
 
-	which $BABELTRACE_BIN >/dev/null
-	skip $? -ne 0 "Babeltrace binary not found. Skipping trace matches"
+	local count
+	local total
+
+	bail_out_if_no_babeltrace
 
-	local count=$($BABELTRACE_BIN $trace_path | grep $event_name | wc -l)
-	local total=$($BABELTRACE_BIN $trace_path | wc -l)
+	count=$($BABELTRACE_BIN "$trace_path" | grep -c "$event_name")
+	total=$($BABELTRACE_BIN "$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 $count"
-    fi
+	test "$count" -eq "$expected"
+
+	ok $? "Found $count / $expected events matching '$event_name' out of $total events"
 }
 
-function validate_trace
+# Check that the trace contains '$expected' events matching '$event_name' and no
+# other events.
+function trace_match_only()
 {
 	local event_name=$1
+	local expected=$2
+	local trace_path=$3
+
+	local count
+	local total
+
+	bail_out_if_no_babeltrace
+
+	count=$($BABELTRACE_BIN "$trace_path" | grep -c "$event_name")
+	total=$($BABELTRACE_BIN "$trace_path" | wc -l)
+
+	test "$expected" -eq "$count" && test "$total" -eq "$expected"
+
+	ok $? "Found $count / $expected events matching '$event_name' amongst $total events"
+}
+
+# Check that the trace contains at least 1 event matching each name in the
+# comma separated list '$event_names'.
+function validate_trace()
+{
+	local event_names=$1
 	local trace_path=$2
 
-	which $BABELTRACE_BIN >/dev/null
-	if [ $? -ne 0 ]; then
-	    skip 0 "Babeltrace binary not found. Skipping trace validation"
-	fi
+	local count
+
+	bail_out_if_no_babeltrace
 
 	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
+	for event_name in $event_names; do
+		# trace_path is unquoted since callers make use of globbing
+		count=$($BABELTRACE_BIN $trace_path | grep -c "$event_name")
+		test "$count" -gt 0
+		ok $? "Found $count events matching '$event_name'"
 	done
-	ret=$?
 	IFS=$OLDIFS
-	return $ret
 }
 
-function validate_trace_count
+# Check that the trace contains at least 1 event matching each name in the
+# comma separated list '$event_names' and a total of '$expected' events.
+function validate_trace_count()
 {
-	local event_name=$1
+	local event_names=$1
 	local trace_path=$2
-	local expected_count=$3
+	local expected=$3
 
-	which $BABELTRACE_BIN >/dev/null
-	if [ $? -ne 0 ]; then
-	    skip 0 "Babeltrace binary not found. Skipping trace validation"
-	fi
+	local count
+	local total=0
+
+	bail_out_if_no_babeltrace
 
-	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))
+	for event_name in $event_names; do
+		count=$($BABELTRACE_BIN "$trace_path" | grep -c "$event_name")
+		test "$count" -gt 0
+		ok $? "Found '$count' events matching '$event_name'"
+		total=$(( total + count ))
 	done
 	IFS=$OLDIFS
-	test $cnt -eq $expected_count
-	ok $? "Read a total of $cnt events, expected $expected_count"
+	test $total -eq "$expected"
+	ok $? "Found $total events, expected $expected events"
 }
 
-function trace_first_line
+# Check that the trace contains at least '$expected_min' event matching each
+# name in the comma separated list '$event_names' and a total at least
+# '$expected_min' and less than '$expected_max' events.
+function validate_trace_count_range_incl_min_excl_max()
 {
-	local trace_path=$1
+	local event_names=$1
+	local trace_path=$2
+	local expected_min=$3
+	local expected_max=$4
 
-	which $BABELTRACE_BIN >/dev/null
-	if [ $? -ne 0 ]; then
-	    skip 0 "Babeltrace binary not found. Skipping trace validation"
-	fi
+	local count
+	local total=0
+
+	bail_out_if_no_babeltrace
+
+	OLDIFS=$IFS
+	IFS=","
+	for event_name in $event_names; do
+		count=$($BABELTRACE_BIN "$trace_path" | grep -c "$event_name")
+		test "$count" -ge "$expected_min"
+		ok $? "Found $count events matching '$event_name', expected at least $expected_min"
+		total=$(( total + count ))
+	done
+	IFS=$OLDIFS
+	test $total -ge "$expected_min" && test $total -lt "$expected_max"
+	ok $? "Found a total of $total events, expected at least $expected_min and less than $expected_max"
+}
+
+function trace_first_line()
+{
+	local trace_path=$1
 
-	$BABELTRACE_BIN $trace_path 2>/dev/null | head -n 1
+	$BABELTRACE_BIN "$trace_path" | head -n 1
 }
 
+# Check that the trace contains at least 1 event matching the grep extended
+# regexp '$event_exp'.
 function validate_trace_exp()
 {
 	local event_exp=$1
 	local trace_path=$2
 
-	which $BABELTRACE_BIN >/dev/null
-	skip $? -ne 0 "Babeltrace binary not found. Skipping trace validation"
+	local count
 
-	traced=$($BABELTRACE_BIN $trace_path 2>/dev/null | grep ${event_exp} | wc -l)
-	if [ "$traced" -ne 0 ]; then
-		pass "Validate trace for expression '${event_exp}', $traced events"
-	else
-		fail "Validate trace for expression '${event_exp}'"
-		diag "Found $traced occurences of '${event_exp}'"
-	fi
-	ret=$?
-	return $ret
+	bail_out_if_no_babeltrace
+
+	# event_exp is unquoted since it contains multiple grep arguments
+	count=$($BABELTRACE_BIN "$trace_path" | grep -c --extended-regexp $event_exp)
+	test "$count" -gt 0
+	ok $? "Found $count events matching expression '$event_exp'"
 }
 
+# Check that the trace contains at least 1 event matching the grep extended
+# regexp '$event_exp' and zero event not matching it.
 function validate_trace_only_exp()
 {
 	local event_exp=$1
 	local trace_path=$2
 
-	which $BABELTRACE_BIN >/dev/null
-	skip $? -ne 0 "Babeltrace binary not found. Skipping trace matches"
+	local count
+	local total
 
-	local count=$($BABELTRACE_BIN $trace_path | grep ${event_exp} | wc -l)
-	local total=$($BABELTRACE_BIN $trace_path | wc -l)
+	bail_out_if_no_babeltrace
 
-	if [ "$count" -ne 0 ] && [ "$total" -eq "$count" ]; then
-		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}' ($count occurrences) are expected"
-	fi
-	ret=$?
-	return $ret
+	# event_exp is unquoted since it contains multiple grep arguments
+	count=$($BABELTRACE_BIN "$trace_path" | grep -c --extended-regexp $event_exp)
+	total=$($BABELTRACE_BIN "$trace_path" | wc -l)
+
+	test  "$count" -gt 0 && test "$total" -eq "$count"
+	ok $? "Found $count events matching expression '$event_exp' amongst $total events"
 }
 
+# Check that the trace is valid and contains 0 event.
 function validate_trace_empty()
 {
 	local trace_path=$1
 
-	which $BABELTRACE_BIN >/dev/null
-	if [ $? -ne 0 ]; then
-	    skip 0 "Babeltrace binary not found. Skipping trace validation"
-	fi
+	local ret
+	local count
 
-	events=$($BABELTRACE_BIN $trace_path 2>/dev/null)
+	bail_out_if_no_babeltrace
+
+	events=$($BABELTRACE_BIN "$trace_path")
 	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
-		fail "Validate empty trace"
-		diag "Found $traced events in trace"
-	fi
+	count=$(echo -n "$events" | wc -l)
+	test "$count" -eq 0
+	ok $? "Validate trace is empty, found $count events"
+}
+
+function validate_directory_empty ()
+{
+	local trace_path="$1"
+
+	local files
+	local ret
+	local nb_files
+
+	# Do not double quote `$trace_path` below as we want wildcards to be
+	# expanded.
+	files="$(ls -A $trace_path)"
 	ret=$?
-	return $ret
+	if [ $ret -ne 0 ]; then
+		fail "Failed to list content of directory \"$trace_path\""
+		return $ret
+	fi
+
+	nb_files="$(echo -n "$files" | wc -l)"
+	test "$nb_files" -eq 0
+	ok $? "Directory \"$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 ()
@@ -1560,7 +2303,8 @@ 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> $ERROR_OUTPUT_DEST
+	_run_lttng_cmd "$OUTPUT_DEST" "$ERROR_OUTPUT_DEST" \
+		regenerate metadata -s $sess_name
 	ret=$?
 	if [[ $expected_to_fail -eq "1" ]]; then
 		test "$ret" -ne "0"
@@ -1585,13 +2329,14 @@ 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> $ERROR_OUTPUT_DEST
+	_run_lttng_cmd "$OUTPUT_DEST" "$ERROR_OUTPUT_DEST" \
+		regenerate statedump -s $sess_name
 	ret=$?
 	if [[ $expected_to_fail -eq "1" ]]; then
 		test "$ret" -ne "0"
 		ok $? "Expected fail on regenerate statedump $sess_name"
 	else
-		ok $ret "Metadata regenerate $sess_name"
+		ok $ret "Statedump regenerate $sess_name"
 	fi
 }
 
@@ -1610,7 +2355,8 @@ 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> $ERROR_OUTPUT_DEST
+	_run_lttng_cmd "$OUTPUT_DEST" "$ERROR_OUTPUT_DEST" \
+		rotate $sess_name
 	ret=$?
 	if [[ $expected_to_fail -eq "1" ]]; then
 		test "$ret" -ne "0"
@@ -1632,7 +2378,7 @@ function rotate_session_fail ()
 
 function destructive_tests_enabled ()
 {
-	if [ ${LTTNG_ENABLE_DESTRUCTIVE_TESTS} = "will-break-my-system" ]; then
+	if [ "$LTTNG_ENABLE_DESTRUCTIVE_TESTS" = "will-break-my-system" ]; then
 		return 0
 	else
 		return 1
@@ -1645,13 +2391,14 @@ function lttng_enable_rotation_timer ()
 	local sess_name=$2
 	local period=$3
 
-	$TESTDIR/../src/bin/lttng/$LTTNG_BIN enable-rotation -s $sess_name --timer $period 1> $OUTPUT_DEST 2> $ERROR_OUTPUT_DEST
+	_run_lttng_cmd "$OUTPUT_DEST" "$ERROR_OUTPUT_DEST" \
+		enable-rotation -s $sess_name --timer $period
 	ret=$?
 	if [[ $expected_to_fail -eq "1" ]]; then
 		test "$ret" -ne "0"
-		ok $? "Expected fail on rotate session $sess_name"
+		ok $? "Expected fail when setting periodic rotation ($period) of session $sess_name"
 	else
-		ok $ret "Rotate session $sess_name"
+		ok $ret "Set periodic rotation ($period) of session $sess_name"
 	fi
 }
 
@@ -1671,13 +2418,14 @@ function lttng_enable_rotation_size ()
 	local sess_name=$2
 	local size=$3
 
-	$TESTDIR/../src/bin/lttng/$LTTNG_BIN enable-rotation -s $sess_name --size $size 1> $OUTPUT_DEST 2> $ERROR_OUTPUT_DEST
+	_run_lttng_cmd "$OUTPUT_DEST" "$ERROR_OUTPUT_DEST" \
+		enable-rotation -s $sess_name --size $size
 	ret=$?
 	if [[ $expected_to_fail -eq "1" ]]; then
 		test "$ret" -ne "0"
-		ok $? "Expected fail on rotate session $sess_name"
+		ok $? "Expected to fail to set a periodic rotation of session $sess_name" "every " $size " bytes"
 	else
-		ok $ret "Rotate session $sess_name"
+		ok $ret "Set a scheduled rotation of session $sess_name" "every " $size " bytes"
 	fi
 }
 
@@ -1690,3 +2438,364 @@ function lttng_enable_rotation_size_fail ()
 {
 	lttng_enable_rotation_size 1 $@
 }
+
+function lttng_clear_session ()
+{
+	local expected_to_fail=$1
+	local sess_name=$2
+
+	_run_lttng_cmd "$OUTPUT_DEST" "$ERROR_OUTPUT_DEST" \
+		clear $sess_name
+	ret=$?
+	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 $@
+}
+
+function lttng_clear_all ()
+{
+	_run_lttng_cmd "$OUTPUT_DEST" "$ERROR_OUTPUT_DEST" \
+		clear --all
+	ok $? "Clear all lttng sessions"
+}
+
+function lttng_add_trigger()
+{
+	local expected_to_fail="$1"
+	local trigger_name="$2"
+	shift 2
+	local args=("$@")
+
+	diag "$TESTDIR/../src/bin/lttng/$LTTNG_BIN add-trigger --name $trigger_name ${args[*]}"
+	$TESTDIR/../src/bin/lttng/$LTTNG_BIN add-trigger --name "$trigger_name" "${args[@]}" 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="$2"
+	shift 2
+
+	diag "$TESTDIR/../src/bin/lttng/$LTTNG_BIN remove-trigger $trigger_name $*"
+	"$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 "$@"
+}
+
+function lttng_remove_trigger_ok()
+{
+	lttng_remove_trigger 0 "$@"
+}
+
+function list_triggers_matches_ok ()
+{
+	local tmp_stdout=$(mktemp -t "tmp.${FUNCNAME[0]}_stdout.XXXXXX")
+	local tmp_stderr=$(mktemp -t "tmp.${FUNCNAME[0]}_stderr.XXXXXX")
+
+	local test_name="$1"
+	local expected_stdout_file="$2"
+
+	diag "$TESTDIR/../src/bin/lttng/$LTTNG_BIN list-triggers"
+
+	"$TESTDIR/../src/bin/lttng/$LTTNG_BIN" list-triggers > "${tmp_stdout}" 2> "${tmp_stderr}"
+	ok $? "${test_name}: exit code is 0"
+
+	diff -u "${expected_stdout_file}" "${tmp_stdout}"
+	ok $? "${test_name}: expected stdout"
+
+	diff -u /dev/null "${tmp_stderr}"
+	ok $? "${test_name}: expected stderr"
+
+	rm -f "${tmp_stdout}"
+	rm -f "${tmp_stderr}"
+}
+
+function list_triggers_matches_mi_ok ()
+{
+	local tmp_stdout
+	local tmp_stdout_raw
+	local tmp_stderr
+
+	local test_name="$1"
+	local expected_stdout_file="$2"
+
+	tmp_stdout_raw=$(mktemp -t "tmp.${FUNCNAME[0]}_stdout.XXXXXX")
+	tmp_stdout=$(mktemp -t "tmp.${FUNCNAME[0]}_stdout.XXXXXX")
+	tmp_stderr=$(mktemp -t "tmp.${FUNCNAME[0]}_stderr.XXXXXX")
+
+	diag "$TESTDIR/../src/bin/lttng/$LTTNG_BIN --mi xml list-triggers"
+
+	"$TESTDIR/../src/bin/lttng/$LTTNG_BIN" --mi=xml list-triggers > "${tmp_stdout_raw}" 2> "${tmp_stderr}"
+	ok $? "${test_name}: exit code is 0"
+
+	# Pretty-fy xml before further test.
+	$XML_PRETTY < "${tmp_stdout_raw}" > "${tmp_stdout}"
+
+	$MI_VALIDATE "${tmp_stdout}"
+	ok $? "list-trigger mi is valid"
+
+	diff -u "${expected_stdout_file}" "${tmp_stdout}"
+	ok $? "${test_name}: expected stdout"
+
+	diff -u /dev/null "${tmp_stderr}"
+	ok $? "${test_name}: expected stderr"
+
+	rm -f "${tmp_stdout}"
+	rm -f "${tmp_stdout_raw}"
+	rm -f "${tmp_stderr}"
+}
+
+function validate_path_pattern ()
+{
+	local message=$1
+	local pattern=$2
+	# Base path is only used in error case and is used to list the content
+	# of the base path.
+	local base_path=$3
+
+
+	[ -f $pattern ]
+	ret=$?
+	ok $ret "$message"
+
+	if [ "$ret" -ne "0" ]; then
+		diag "Path pattern expected: $pattern"
+		# List the tracepath for more info. We use find as a recursive
+		# directory lister.
+		diag "The base path content:"
+		find "$base_path" -print
+	fi
+}
+
+function validate_trace_path_ust_uid ()
+{
+	local trace_path=$1
+	local session_name=$2
+	local uid=$UID
+	local pattern="$trace_path/$session_name-$date_time_pattern/ust/uid/$uid/${system_long_bit_size}-bit/metadata"
+
+	validate_path_pattern "UST per-uid trace path is valid" "$pattern" "$trace_path"
+}
+
+function validate_trace_path_ust_uid_network ()
+{
+	local trace_path=$1
+	local session_name=$2
+	local base_path=$3
+	local uid=$UID
+	local hostname=$HOSTNAME
+	local pattern
+	local ret
+
+	# If the session was given a network base path (e.g
+	# 127.0.0.1/my/custom/path on creation, there is no session name
+	# component to the path on the relayd side. Caller can simply not pass a
+	# session name for this scenario.
+	if [ -n "$session_name" ]; then
+		session_name="$session_name-$date_time_pattern"
+		if [ -n "$base_path" ]; then
+			fail "Session name and base path are mutually exclusive"
+			return
+		fi
+	fi
+
+	pattern="$trace_path/$hostname/$base_path/$session_name/ust/uid/$uid/${system_long_bit_size}-bit/metadata"
+
+	validate_path_pattern "UST per-uid network trace path is valid" "$pattern" "$trace_path"
+}
+
+function validate_trace_path_ust_uid_snapshot_network ()
+{
+	local trace_path=$1
+	local session_name=$2
+	local snapshot_name=$3
+	local snapshot_number=$4
+	local base_path=$5
+	local hostname=$HOSTNAME
+	local uid=$UID
+	local pattern
+	local ret
+
+	# If the session/output was given a network base path (e.g
+	# 127.0.0.1/my/custom/path on creation, there is no session name
+	# component to the path on the relayd side. Caller can simply not pass a
+	# session name for this scenario.
+	if [ -n "$session_name" ]; then
+		session_name="$session_name-$date_time_pattern"
+		if [ -n "$base_path" ]; then
+			fail "Session name and base path are mutually exclusive"
+			return
+		fi
+	fi
+
+	pattern="$trace_path/$hostname/$base_path/$session_name/$snapshot_name-$date_time_pattern-$snapshot_number/ust/uid/$uid/${system_long_bit_size}-bit/metadata"
+
+	validate_path_pattern "UST per-uid network snapshot trace path is valid" "$pattern" "$trace_path"
+}
+
+function validate_trace_path_ust_uid_snapshot ()
+{
+	local trace_path=$1
+	local session_name=$2
+	local snapshot_name=$3
+	local snapshot_number=$4
+	local base_path=$5
+	local uid=$UID
+	local pattern
+	local ret
+
+	# If the session/output was given a network base path (e.g
+	# 127.0.0.1/my/custom/path) on creation, there is no session name
+	# component to the path on the relayd side. Caller can simply not pass a
+	# session name for this scenario.
+	if [ -n "$session_name" ]; then
+		session_name="$session_name-$date_time_pattern"
+		if [ -n "$base_path" ]; then
+			fail "Session name and base path are mutually exclusive"
+			return
+		fi
+	fi
+
+	pattern="$trace_path/$base_path/$session_name/$snapshot_name-$date_time_pattern-$snapshot_number/ust/uid/$uid/${system_long_bit_size}-bit/metadata"
+
+	validate_path_pattern "UST per-uid snapshot trace path is valid" "$pattern" "$trace_path"
+}
+
+function validate_trace_path_ust_pid ()
+{
+	local trace_path=$1
+	local session_name=$2
+	local app_string=$3
+	local pid=$4
+	local pattern
+	local ret
+
+	# If the session was given a trace path on creation, there is no session
+	# name component to the path. Caller can simply not pass a session name
+	# for this scenario.
+	if [ -n "$session_name" ]; then
+		session_name="$session_name-$date_time_pattern"
+	fi
+
+	pattern="$trace_path/$session_name/ust/pid/$pid/$app_string-*-$date_time_pattern/metadata"
+
+	validate_path_pattern "UST per-pid trace path is valid" "$pattern" "$trace_path"
+}
+
+function validate_trace_path_kernel ()
+{
+	local trace_path=$1
+	local session_name=$2
+	local pattern
+
+	# If the session was given a trace path on creation, there is no session
+	# name component to the path. Caller can simply not pass a session name
+	# for this scenario.
+	if [ -n "$session_name" ]; then
+		session_name="$session_name-$date_time_pattern"
+	fi
+
+	pattern="$trace_path/$session_name/kernel/metadata"
+
+	validate_path_pattern "Kernel trace path is valid" "$pattern" "$trace_path"
+}
+
+function validate_trace_path_kernel_network ()
+{
+	local trace_path=$1
+	local session_name=$2
+	local hostname=$HOSTNAME
+	local pattern="$trace_path/$hostname/$session_name-$date_time_pattern/kernel/metadata"
+
+	validate_path_pattern "Kernel network trace path is valid" "$pattern" "$trace_path"
+}
+
+function validate_trace_path_kernel_snapshot ()
+{
+	local trace_path=$1
+	local session_name=$2
+	local snapshot_name=$3
+	local snapshot_number=$4
+	local base_path=$5
+	local pattern
+	local ret
+
+	# If the session/output was given a network base path (e.g
+	# 127.0.0.1/my/custom/path on creation, there is no session name
+	# component to the path on the relayd side. Caller can simply not pass a
+	# session name for this scenario.
+	if [ -n "$session_name" ]; then
+		session_name="$session_name-$date_time_pattern"
+		if [ -n "$base_path" ]; then
+			fail "Session name and base path are mutually exclusive"
+			return
+		fi
+	fi
+
+	pattern="$trace_path/$base_path/$session_name/$snapshot_name-$date_time_pattern-$snapshot_number/kernel/metadata"
+
+	validate_path_pattern "Kernel snapshot trace path is valid" "$pattern" "$trace_path"
+}
+
+function validate_trace_path_kernel_snapshot_network ()
+{
+	local trace_path=$1
+	local session_name=$2
+	local snapshot_name=$3
+	local snapshot_number=$4
+	local base_path=$5
+	local hostname=$HOSTNAME
+	local pattern
+	local ret
+
+	# If the session/output was given a network base path (e.g
+	# 127.0.0.1/my/custom/path on creation, there is no session name
+	# component to the path on the relayd side. Caller can simply not pass a
+	# session name for this scenario.
+	if [ -n "$session_name" ]; then
+		session_name="$session_name-$date_time_pattern"
+		if [ -n "$base_path" ]; then
+			fail "Session name and base path are mutually exclusive"
+			return
+		fi
+	fi
+
+	pattern="$trace_path/$hostname/$base_path/$session_name/$snapshot_name-$date_time_pattern-$snapshot_number/kernel/metadata"
+
+	validate_path_pattern "Kernel network snapshot trace path is valid" "$pattern" "$trace_path"
+}