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#!/bin/sh
# Check Arm64 callgraphs are complete in fp mode
# SPDX-License-Identifier: GPL-2.0
lscpu | grep -q "aarch64" || exit 2
if ! [ -x "$(command -v cc)" ]; then
echo "failed: no compiler, install gcc"
exit 2
fi
PERF_DATA=$(mktemp /tmp/__perf_test.perf.data.XXXXX)
TEST_PROGRAM_SOURCE=$(mktemp /tmp/test_program.XXXXX.c)
TEST_PROGRAM=$(mktemp /tmp/test_program.XXXXX)
cleanup_files()
{
rm -f $PERF_DATA
rm -f $TEST_PROGRAM_SOURCE
rm -f $TEST_PROGRAM
}
trap cleanup_files exit term int
cat << EOF > $TEST_PROGRAM_SOURCE
int a = 0;
void leaf(void) {
for (;;)
a += a;
}
void parent(void) {
leaf();
}
int main(void) {
parent();
return 0;
}
EOF
echo " + Compiling test program ($TEST_PROGRAM)..."
CFLAGS="-g -O0 -fno-inline -fno-omit-frame-pointer"
cc $CFLAGS $TEST_PROGRAM_SOURCE -o $TEST_PROGRAM || exit 1
# Add a 1 second delay to skip samples that are not in the leaf() function
perf record -o $PERF_DATA --call-graph fp -e cycles//u -D 1000 --user-callchains -- $TEST_PROGRAM 2> /dev/null &
PID=$!
echo " + Recording (PID=$PID)..."
sleep 2
echo " + Stopping perf-record..."
kill $PID
wait $PID
# expected perf-script output:
#
# program
# 728 leaf
# 753 parent
# 76c main
# ...
perf script -i $PERF_DATA -F comm,ip,sym | head -n4
perf script -i $PERF_DATA -F comm,ip,sym | head -n4 | \
awk '{ if ($2 != "") sym[i++] = $2 } END { if (sym[0] != "leaf" ||
sym[1] != "parent" ||
sym[2] != "main") exit 1 }'
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