tools/perf/perf-with-kcore.sh

2 # SPDX-License-Identifier: GPL-2.0-only
3 # perf-with-kcore: use perf with a copy of kcore
7 set -e
11 …echo "Usage: perf-with-kcore <perf sub-command> <perf.data directory> [<sub-command options> [ -- …
12         echo "       <perf sub-command> can be record, script, report or inject" >&2
13         echo "   or: perf-with-kcore fix_buildid_cache_permissions" >&2
19 	if [ -n "$PERF" ] ; then
23 	if [ -z "$PERF" ] ; then
27 	if [ ! -x "$PERF" ] ; then
39 	if [ $EUID -eq 0 ] ; then
45 	rm -f perf.data.junk
46 	("$PERF" record -o perf.data.junk "${PERF_OPTIONS[@]}" -- sleep 60) >/dev/null 2>/dev/null &
52 	KCORE=$(($SUDO "$PERF" buildid-cache -v -f -k /proc/kcore >/dev/null) 2>&1)
54 	"kcore added to build-id cache directory "*)
55 		KCORE_DIR=${KCORE#"kcore added to build-id cache directory "}
71 	$SUDO cp -a "$KCORE_DIR" "$(pwd)/$PERF_DATA_DIR"
72 	$SUDO rm -f "$KCORE_DIR/kcore"
73 	$SUDO rm -f "$KCORE_DIR/kallsyms"
74 	$SUDO rm -f "$KCORE_DIR/modules"
83 	$SUDO chown $UID "$KCORE_DIR/modules"
88 	$SUDO chgrp $GROUPS "$KCORE_DIR/modules"
90 	ln -s "$KCORE_DIR_BASENAME" "$PERF_DATA_DIR/kcore_dir"
95 	if [ $EUID -ne 0 ] ; then
100 	if [ -z "$SUDO_USER" ] ; then
109 …find "$USER_HOME/.debug" -xdev -type d          ! -user "$SUDO_USER" -ls -exec chown    "$SUDO_USE…
110 …find "$USER_HOME/.debug" -xdev -type f -links 1 ! -user "$SUDO_USER" -ls -exec chown    "$SUDO_USE…
111 …find "$USER_HOME/.debug" -xdev -type l          ! -user "$SUDO_USER" -ls -exec chown -h "$SUDO_USE…
113 	if [ -n "$SUDO_GID" ] ; then
114 …find "$USER_HOME/.debug" -xdev -type d          ! -group "$SUDO_GID" -ls -exec chgrp    "$SUDO_GID…
115 …find "$USER_HOME/.debug" -xdev -type f -links 1 ! -group "$SUDO_GID" -ls -exec chgrp    "$SUDO_GID…
116 …find "$USER_HOME/.debug" -xdev -type l          ! -group "$SUDO_GID" -ls -exec chgrp -h "$SUDO_GID…
124 	if [ $EUID -eq 0 ] ; then
128 	PERMISSIONS_OK+=$(find "$HOME/.debug" -xdev -type d          ! -user "$USER" -print -quit)
129 	PERMISSIONS_OK+=$(find "$HOME/.debug" -xdev -type f -links 1 ! -user "$USER" -print -quit)
130 	PERMISSIONS_OK+=$(find "$HOME/.debug" -xdev -type l          ! -user "$USER" -print -quit)
132 	PERMISSIONS_OK+=$(find "$HOME/.debug" -xdev -type d          ! -group "$GROUPS" -print -quit)
133 	PERMISSIONS_OK+=$(find "$HOME/.debug" -xdev -type f -links 1 ! -group "$GROUPS" -print -quit)
134 	PERMISSIONS_OK+=$(find "$HOME/.debug" -xdev -type l          ! -group "$GROUPS" -print -quit)
136 	if [ -n "$PERMISSIONS_OK" ] ; then
145 	if [ $EUID -ne 0 ] ; then
147 		if [ "$(cat /proc/sys/kernel/kptr_restrict)" -ne 0 ] ; then
151 …if echo "${PERF_OPTIONS[@]}" | grep -q ' -a \|^-a \| -a$\|^-a$\| --all-cpus \|^--all-cpus \| --all…
152 …echo "*** WARNING *** system-wide tracing without root access will not be able to read all necessa…
155 		if echo "${PERF_OPTIONS[@]}" | grep -q 'intel_pt\|intel_bts\| -I\|^-I' ; then
156 			if [ "$(cat /proc/sys/kernel/perf_event_paranoid)" -gt -1 ] ; then
160 …if echo "${PERF_OPTIONS[@]}" | grep -q ' --per-thread \|^--per-thread \| --per-thread$\|^--per-thr…
162 			elif echo "${PERF_OPTIONS[@]}" | grep -q ' -t \|^-t \| -t$\|^-t$' ; then
164 			elif [ ! -r /sys/kernel/debug -o ! -x /sys/kernel/debug ] ; then
170 	if [ -z "$1" ] ; then
175 	if [ -e "$PERF_DATA_DIR" ] ; then
184 	echo "$PERF record -o $PERF_DATA_DIR/perf.data ${PERF_OPTIONS[@]} -- $@"
185 	"$PERF" record -o "$PERF_DATA_DIR/perf.data" "${PERF_OPTIONS[@]}" -- "$@" || true
200 …echo "$PERF $PERF_SUB_COMMAND -i $PERF_DATA_DIR/perf.data --kallsyms=$PERF_DATA_DIR/kcore_dir/kall…
201 …"$PERF" $PERF_SUB_COMMAND -i "$PERF_DATA_DIR/perf.data" "--kallsyms=$PERF_DATA_DIR/kcore_dir/kalls…
214 if [ -z "$PERF_SUB_COMMAND" ] ; then
218 if [ -z "$PERF_DATA_DIR" ] ; then
224 	while [ "$1" != "--" ] ; do
228 	if [ "$1" != "--" ] ; then