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#!/bin/sh
# Miscellaneous Intel PT testing
# SPDX-License-Identifier: GPL-2.0
set -e
# Skip if no Intel PT
perf list | grep -q 'intel_pt//' || exit 2
skip_cnt=0
ok_cnt=0
err_cnt=0
tmpfile=`mktemp`
perfdatafile=`mktemp`
can_cpu_wide()
{
perf record -o ${tmpfile} -B -N --no-bpf-event -e dummy:u -C $1 true 2>&1 >/dev/null || return 2
return 0
}
test_system_wide_side_band()
{
# Need CPU 0 and CPU 1
can_cpu_wide 0 || return $?
can_cpu_wide 1 || return $?
# Record on CPU 0 a task running on CPU 1
perf record -B -N --no-bpf-event -o ${perfdatafile} -e intel_pt//u -C 0 -- taskset --cpu-list 1 uname
# Should get MMAP events from CPU 1 because they can be needed to decode
mmap_cnt=`perf script -i ${perfdatafile} --no-itrace --show-mmap-events -C 1 2>/dev/null | grep MMAP | wc -l`
if [ ${mmap_cnt} -gt 0 ] ; then
return 0
fi
echo "Failed to record MMAP events on CPU 1 when tracing CPU 0"
return 1
}
count_result()
{
if [ $1 -eq 2 ] ; then
skip_cnt=`expr ${skip_cnt} \+ 1`
return
fi
if [ $1 -eq 0 ] ; then
ok_cnt=`expr ${ok_cnt} \+ 1`
return
fi
err_cnt=`expr ${err_cnt} \+ 1`
}
test_system_wide_side_band
count_result $?
rm -f ${tmpfile}
rm -f ${perfdatafile}
if [ ${err_cnt} -gt 0 ] ; then
exit 1
fi
if [ ${ok_cnt} -gt 0 ] ; then
exit 0
fi
exit 2
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