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|
#!/bin/bash
# perf script --dlfilter tests
# SPDX-License-Identifier: GPL-2.0
set -e
shelldir=$(dirname "$0")
# shellcheck source=lib/setup_python.sh
. "${shelldir}"/lib/setup_python.sh
# skip if there's no compiler
if ! [ -x "$(command -v cc)" ]; then
echo "failed: no compiler, install gcc"
exit 2
fi
err=0
perfdata=$(mktemp /tmp/__perf_test.perf.data.XXXXX)
dlfilter_c=$(mktemp /tmp/__perf_test.dlfilter.test.c.XXXXX)
dlfilter_so=$(mktemp /tmp/__perf_test.dlfilter.so.XXXXX)
cleanup() {
rm -f "${perfdata}"
rm -f "${dlfilter_c}"
rm -f "${dlfilter_so}"
rm -f "${dlfilter_so}.o"
trap - EXIT TERM INT
}
trap_cleanup() {
echo "Unexpected signal in ${FUNCNAME[1]}"
cleanup
exit 1
}
trap trap_cleanup EXIT TERM INT
cat <<EOF > "${dlfilter_c}"
#include <perf/perf_dlfilter.h>
#include <string.h>
#include <stdio.h>
struct perf_dlfilter_fns perf_dlfilter_fns;
int filter_event(void *data, const struct perf_dlfilter_sample *sample, void *ctx)
{
const struct perf_dlfilter_al *al;
if (!sample->ip)
return 0;
al = perf_dlfilter_fns.resolve_ip(ctx);
if (!al || !al->sym || strcmp(al->sym, "test_loop"))
return 1;
return 0;
}
EOF
test_dlfilter() {
echo "Basic --dlfilter test"
# Generate perf.data file
if ! perf record -o "${perfdata}" perf test -w thloop 1 2> /dev/null
then
echo "Basic --dlfilter test [Failed record]"
err=1
return
fi
# Build the dlfilter
if ! cc -c -I tools/perf/include -fpic -x c "${dlfilter_c}" -o "${dlfilter_so}.o"
then
echo "Basic --dlfilter test [Failed to build dlfilter object]"
err=1
return
fi
if ! cc -shared -o "${dlfilter_so}" "${dlfilter_so}.o"
then
echo "Basic --dlfilter test [Failed to link dlfilter shared object]"
err=1
return
fi
# Check that the output contains "test_loop" and nothing else
if ! perf script -i "${perfdata}" --dlfilter "${dlfilter_so}" | grep -q "test_loop"
then
echo "Basic --dlfilter test [Failed missing output]"
err=1
return
fi
# The filter should filter out everything except test_loop, so ensure no other symbols are present
# This is a simple check; we could be more rigorous
if perf script -i "${perfdata}" --dlfilter "${dlfilter_so}" | grep -v "test_loop" | grep -q "perf"
then
echo "Basic --dlfilter test [Failed filtering]"
err=1
return
fi
echo "Basic --dlfilter test [Success]"
}
test_dlfilter
cleanup
exit $err
|
