#!/bin/bash# perf timechart tests# SPDX-License-Identifier: GPL-2.0 set -e err=0perfdata=$(mktemp /tmp/__perf_timechart_test.perf.data.XXXXX)output=$(mktemp /tmp/__perf_timechart_test.output.XXXXX.svg) cleanup() {	rm -f "${perfdata}"*	rm -f "${output}"	trap - EXIT TERM INT} trap_cleanup() {	echo "Unexpected signal in ${FUNCNAME[1]}"	cleanup	exit 1}trap trap_cleanup EXIT TERM INT test_timechart() {	NAME=$1	OPTION=$2 	echo "perf timechart ${NAME} test" 	# Try to record timechart data.	# perf timechart record uses system-wide recording and specific tracepoints.	# If it fails (e.g. permissions, missing tracepoints), skip the test.	if ! perf timechart record -o "${perfdata}" ${OPTION} true > /dev/null 2>&1; then		echo "perf timechart ${NAME} test [Skipped: perf timechart record failed (permissions/events?)]"		return	fi 	# Generate the timechart	if ! perf timechart -i "${perfdata}" -o "${output}" > /dev/null 2>&1; then		echo "perf timechart ${NAME} test [Failed: perf timechart command failed]"		err=1		return	fi 	# Check if output file exists and is not empty	if [ ! -s "${output}" ]; then		echo "perf timechart ${NAME} test [Failed: output file is empty or missing]"		err=1		return	fi 	# Check if it looks like an SVG	if ! grep -q "svg" "${output}"; then		echo "perf timechart ${NAME} test [Failed: output doesn't look like SVG]"		err=1		return	fi 	echo "perf timechart ${NAME} test [Success]"} if ! perf check feature -q libtraceevent ; then	echo "perf timechart is not supported. Skip."        cleanup	exit 2fi test_timechart "Basic" ""test_timechart "IO-only" "-I"test_timechart "Backtrace" "-g" cleanupexit $err