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 OUTPUT_DIR=sandbox
   9 TRACE_OPT="FTRACE=1"
  10
  11 fail() {
  12         echo "Test failed: $1"
  13         if [ -n ${tmp} ]; then
  14                 rm ${tmp}
  15         fi
  16         exit 1
  17 }
  18
  19 build_uboot() {
  20         echo "Build sandbox"
  21         OPTS="O=${OUTPUT_DIR} ${TRACE_OPT}"
  22         NUM_CPUS=$(grep -c processor /proc/cpuinfo)
  23         make ${OPTS} sandbox_config
  24         make ${OPTS} -s -j${NUM_CPUS}
  25 }
  26
  27 run_trace() {
  28         echo "Run trace"
  29         ./${OUTPUT_DIR}/u-boot <<END
  30         trace stats
  31         hash sha256 0 10000
  32         trace pause
  33         trace stats
  34         hash sha256 0 10000
  35         trace stats
  36         trace resume
  37         hash sha256 0 10000
  38         trace pause
  39         trace stats
  40         reset
  41 END
  42 }
  43
  44 check_results() {
  45         echo "Check results"
  46
  47         # Expect sha256 to run 3 times, so we see the string 6 times
  48         if [ $(grep -c sha256 ${tmp}) -ne 6 ]; then
  49                 fail "sha256 error"
  50         fi
  51
  52         # 4 sets of results (output of 'trace stats')
  53         if [ $(grep -c "traced function calls" ${tmp}) -ne 4 ]; then
  54                 fail "trace output error"
  55         fi
  56
  57         # Check trace counts. We expect to see an increase in the number of
  58         # traced function calls between each 'trace stats' command, except
  59         # between calls 2 and 3, where tracing is paused.
  60         # This code gets the sign of the difference between each number and
  61         # its predecessor.
  62         counts="$(tr -d , <${tmp} | awk '/traced function calls/ { diff = $1 - upto; upto = $1; printf "%d ", diff < 0 ? -1 : (diff > 0 ? 1 : 0)}')"
  63
  64         if [ "${counts}" != "1 1 0 1 " ]; then
  65                 fail "trace collection error: ${counts}"
  66         fi
  67 }
  68
  69 echo "Simple trace test / sanity check using sandbox"
  70 echo
  71 tmp="$(tempfile)"
  72 build_uboot
  73 run_trace >${tmp}
  74 check_results ${tmp}
  75 rm ${tmp}
  76 echo "Test passed"