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#!/bin/bash
# perf trace BTF general tests
# SPDX-License-Identifier: GPL-2.0
err=0
set -e
# shellcheck source=lib/probe.sh
. "$(dirname $0)"/lib/probe.sh
file1=$(mktemp /tmp/file1_XXXX)
file2=$(echo $file1 | sed 's/file1/file2/g')
buffer="buffer content"
perf_config_tmp=$(mktemp /tmp/.perfconfig_XXXXX)
trap cleanup EXIT TERM INT HUP
check_vmlinux() {
echo "Checking if vmlinux BTF exists"
if [ ! -f /sys/kernel/btf/vmlinux ]
then
echo "Skipped due to missing vmlinux BTF"
return 2
fi
return 0
}
trace_test_string() {
echo "Testing perf trace's string augmentation"
if ! perf trace -e renameat* --max-events=1 -- mv ${file1} ${file2} 2>&1 | \
grep -q -E "^mv/[0-9]+ renameat(2)?\(.*, \"${file1}\", .*, \"${file2}\", .*\) += +[0-9]+$"
then
echo "String augmentation test failed"
err=1
fi
}
trace_test_buffer() {
echo "Testing perf trace's buffer augmentation"
# echo will insert a newline (\10) at the end of the buffer
if ! perf trace -e write --max-events=1 -- echo "${buffer}" 2>&1 | \
grep -q -E "^echo/[0-9]+ write\([0-9]+, ${buffer}.*, [0-9]+\) += +[0-9]+$"
then
echo "Buffer augmentation test failed"
err=1
fi
}
trace_test_struct_btf() {
echo "Testing perf trace's struct augmentation"
if ! perf trace -e clock_nanosleep --force-btf --max-events=1 -- sleep 1 2>&1 | \
grep -q -E "^sleep/[0-9]+ clock_nanosleep\(0, 0, \{1,\}, 0x[0-9a-f]+\) += +[0-9]+$"
then
echo "BTF struct augmentation test failed"
err=1
fi
}
cleanup() {
rm -rf ${file1} ${file2} ${perf_config_tmp}
}
trap_cleanup() {
echo "Unexpected signal in ${FUNCNAME[1]}"
cleanup
exit 1
}
# don't overwrite user's perf config
trace_config() {
export PERF_CONFIG=${perf_config_tmp}
perf config trace.show_arg_names=false trace.show_duration=false \
trace.show_timestamp=false trace.args_alignment=0
}
skip_if_no_perf_trace || exit 2
check_vmlinux || exit 2
[ "$(id -u)" = 0 ] || exit 2
trace_config
trace_test_string
if [ $err = 0 ]; then
trace_test_buffer
fi
if [ $err = 0 ]; then
trace_test_struct_btf
fi
cleanup
exit $err
|
