test/trace/test-trace.sh

   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
   8 TRACE_OPT="FTRACE=1"
   9
  10 BASE="$(dirname $0)/.."
  11 . $BASE/common.sh
  12
  13 run_trace() {
  14         echo "Run trace"
  15         ./${OUTPUT_DIR}/u-boot <<END
  16 trace stats
  17 hash sha256 0 10000
  18 trace pause
  19 trace stats
  20 hash sha256 0 10000
  21 trace stats
  22 trace resume
  23 hash sha256 0 10000
  24 trace pause
  25 trace stats
  26 reset
  27 END
  28 }
  29
  30 check_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 ',\r' <${tmp} | awk \
  49                 '/traced function calls/ { diff = $1 - upto; upto = $1; \
  50                 printf "%d ", diff < 0 ? -1 : (diff > 0 ? 1 : 0)}')"
  51
  52         if [ "${counts}" != "1 1 0 1 " ]; then
  53                 fail "trace collection error: ${counts}"
  54         fi
  55 }
  56
  57 echo "Simple trace test / sanity check using sandbox"
  58 echo
  59 tmp="$(tempfile)"
  60 build_uboot "${TRACE_OPT}"
  61 run_trace >${tmp}
  62 check_results ${tmp}
  63 rm ${tmp}
  64 echo "Test passed"