#!/bin/bash# perf top tests (exclusive)# SPDX-License-Identifier: GPL-2.0 set -e err=0log_file=$(mktemp /tmp/perf.top.log.XXXXX) cleanup() {	rm -f "${log_file}"	trap - EXIT TERM INT} trap_cleanup() {	echo "Unexpected signal in ${FUNCNAME[1]}"	cleanup	exit 1}trap trap_cleanup EXIT TERM INT test_basic_perf_top() {	echo "Basic perf top test" 	# Start a workload that spins to generate samples	# thloop runs for the specified number of seconds	perf test -w thloop 20 &	PID=$! 	# Allow it to start	sleep 0.1 	# Run perf top for 5 seconds, monitoring that PID	# Use --stdio to avoid TUI and redirect output	# Use -d 1 to avoid flooding output	# Use -e cpu-clock to ensure we get samples	# Use sleep to keep stdin open but silent, preventing EOF loop or interactive spam	if ! sleep 10 | timeout 5s perf top --stdio -d 1 -e cpu-clock -p $PID > "${log_file}" 2>&1; then		retval=$?		if [ $retval -ne 124 ] && [ $retval -ne 0 ]; then			echo "Basic perf top test [Failed: perf top failed to start or run (ret=$retval)]"			head -n 50 "${log_file}"			kill $PID			wait $PID 2>/dev/null || true			err=1			return		fi	fi 	kill $PID	wait $PID 2>/dev/null || true 	# Check for some sample data (percentage)	if ! grep -E -q "[0-9]+\.[0-9]+%" "${log_file}"; then		echo "Basic perf top test [Failed: no sample percentage found]"		head -n 50 "${log_file}"		err=1		return	fi 	# Check for the symbol	if ! grep -q "test_loop" "${log_file}"; then		echo "Basic perf top test [Failed: test_loop symbol not found]"		head -n 50 "${log_file}"		err=1		return	fi 	echo "Basic perf top test [Success]"} test_basic_perf_topcleanupexit $err