1# Copyright (c) 2013 The Chromium OS Authors. 2# 3# SPDX-License-Identifier: GPL-2.0+ 4# 5 6# Simple test script for tracing with sandbox 7 8TRACE_OPT="FTRACE=1" 9 10BASE="$(dirname $0)/.." 11. $BASE/common.sh 12 13run_trace() { 14 echo "Run trace" 15 ./${OUTPUT_DIR}/u-boot <<END 16trace stats 17hash sha256 0 10000 18trace pause 19trace stats 20hash sha256 0 10000 21trace stats 22trace resume 23hash sha256 0 10000 24trace pause 25trace stats 26reset 27END 28} 29 30check_results() { 31 echo "Check results" 32 33 # Expect sha256 to run 3 times, so we see the string 6 times 34 if [ $(grep -c sha256 ${tmp}) -ne 6 ]; then 35 fail "sha256 error" 36 fi 37 38 # 4 sets of results (output of 'trace stats') 39 if [ $(grep -c "traced function calls" ${tmp}) -ne 4 ]; then 40 fail "trace output error" 41 fi 42 43 # Check trace counts. We expect to see an increase in the number of 44 # traced function calls between each 'trace stats' command, except 45 # between calls 2 and 3, where tracing is paused. 46 # This code gets the sign of the difference between each number and 47 # its predecessor. 48 counts="$(tr -d , <${tmp} | awk '/traced function calls/ { diff = $1 - upto; upto = $1; printf "%d ", diff < 0 ? -1 : (diff > 0 ? 1 : 0)}')" 49 50 if [ "${counts}" != "1 1 0 1 " ]; then 51 fail "trace collection error: ${counts}" 52 fi 53} 54 55echo "Simple trace test / sanity check using sandbox" 56echo 57tmp="$(tempfile)" 58build_uboot "${TRACE_OPT}" 59run_trace >${tmp} 60check_results ${tmp} 61rm ${tmp} 62echo "Test passed" 63