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#!/bin/bash
#
# Script that checks that critical functions in TSan runtime have correct number
# of push/pop/rsp instructions to verify that runtime is efficient enough.
#
# This test can fail when backend code generation changes the output for various
# tsan interceptors. When such a change happens, you can ensure that the
# performance has not regressed by running the following benchmarks before and
# after the breaking change to verify that the values in this file are safe to
# update:
# ./projects/compiler-rt/lib/tsan/tests/rtl/TsanRtlTest
# --gtest_also_run_disabled_tests --gtest_filter=DISABLED_BENCH.Mop*
set -u
if [[ "$#" != 1 ]]; then
echo "Usage: $0 /path/to/binary/built/with/tsan"
exit 1
fi
SCRIPTDIR=$(dirname $0)
RES=$(${SCRIPTDIR}/analyze_libtsan.sh $1)
PrintRes() {
printf "%s\n" "$RES"
}
PrintRes
check() {
res=$(PrintRes | egrep "$1 .* $2 $3; ")
if [ "$res" == "" ]; then
echo FAILED $1 must contain $2 $3
exit 1
fi
}
for f in write1 write2 write4 write8; do
check $f rsp 1
check $f push 2
check $f pop 12
done
for f in read1 read2 read4 read8; do
check $f rsp 1
check $f push 3
check $f pop 18
done
for f in func_entry func_exit; do
check $f rsp 0
check $f push 0
check $f pop 0
check $f call 1 # TraceSwitch()
done
echo LGTM
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