tests: tools/clear/test_ust wait for specific test app pid

[lttng-tools.git] / tests / utils / utils.sh

diff --git a/tests/utils/utils.sh b/tests/utils/utils.sh
index b33a264c2597fd4ca06b6fa08fcf3872ec9a897f..291cb578a98fdfd27d12a0944216ba255a511934 100644 (file)
--- a/tests/utils/utils.sh
+++ b/tests/utils/utils.sh
@@ -148,7 +148,7 @@ function lttng_pgrep ()
 
        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
+               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"
@@ -214,6 +214,105 @@ function randstring()
        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()
 {
@@ -534,7 +633,7 @@ function start_lttng_relayd_opt()
        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 $opt -vvv >>/tmp/relayd.log 2>&1 &
+               #$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 (process mode: $process_mode opt: $opt)"
@@ -1436,9 +1535,14 @@ 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
 
        _run_lttng_cmd "$OUTPUT_DEST" "$ERROR_OUTPUT_DEST" \
-               enable-event "$event_name" -s $sess_name -u --loglevel $loglevel
+               enable-event "${chan[@]}" "$event_name" -s "${sess_name}" -u --loglevel="${loglevel}"
        ok $? "Enable event $event_name with loglevel $loglevel"
 }
 
@@ -1447,9 +1551,14 @@ 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
 
        _run_lttng_cmd "$OUTPUT_DEST" "$ERROR_OUTPUT_DEST" \
-               enable-event "$event_name" -s $sess_name -u --loglevel-only $loglevel
+               enable-event "${chan[@]}" "$event_name" -s "${sess_name}" -u --loglevel-only "${loglevel}"
        ok $? "Enable event $event_name with loglevel-only $loglevel"
 }