tools/testing/selftests/ftrace/test.d/ftrace/func_set_ftrace_file.tc

   1 #!/bin/sh
   2 # SPDX-License-Identifier: GPL-2.0
   3 # description: ftrace - test reading of set_ftrace_filter
   4 #
   5 # The set_ftrace_filter file of ftrace is used to list functions as well as
   6 # triggers (probes) attached to functions. The code to read this file is not
   7 # straight forward and has had various bugs in the past. This test is designed
   8 # to add functions and triggers to that file in various ways and read that
   9 # file in various ways (cat vs dd).
  10 #
  11
  12 # The triggers are set within the set_ftrace_filter file
  13 if [ ! -f set_ftrace_filter ]; then
  14     echo "set_ftrace_filter not found? Is dynamic ftrace not set?"
  15     exit_unsupported
  16 fi
  17
  18 do_reset() {
  19     reset_tracer
  20     reset_ftrace_filter
  21     disable_events
  22     clear_trace
  23     enable_tracing
  24 }
  25
  26 fail() { # mesg
  27     do_reset
  28     echo $1
  29     exit_fail
  30 }
  31
  32 do_reset
  33
  34 FILTER=set_ftrace_filter
  35 FUNC1="schedule"
  36 FUNC2="do_softirq"
  37
  38 ALL_FUNCS="#### all functions enabled ####"
  39
  40 test_func() {
  41     if ! echo "$1" | grep -q "^$2\$"; then
  42         return 0
  43     fi
  44     echo "$1" | grep -v "^$2\$"
  45     return 1
  46 }
  47
  48 check_set_ftrace_filter() {
  49     cat=`cat $FILTER`
  50     dd1=`dd if=$FILTER bs=1 | grep -v -e 'records in' -e 'records out' -e 'bytes copied'`
  51     dd100=`dd if=$FILTER bs=100 | grep -v -e 'records in' -e 'records out' -e 'bytes copied'`
  52
  53     echo "Testing '$@'"
  54
  55     while [ $# -gt 0 ]; do
  56         echo "test $1"
  57         if cat=`test_func "$cat" "$1"`; then
  58             return 0
  59         fi
  60         if dd1=`test_func "$dd1" "$1"`; then
  61             return 0
  62         fi
  63         if dd100=`test_func "$dd100" "$1"`; then
  64             return 0
  65         fi
  66         shift
  67     done
  68
  69     if [ -n "$cat" ]; then
  70         return 0
  71     fi
  72     if [ -n "$dd1" ]; then
  73         return 0
  74     fi
  75     if [ -n "$dd100" ]; then
  76         return 0
  77     fi
  78     return 1;
  79 }
  80
  81 if check_set_ftrace_filter "$ALL_FUNCS"; then
  82     fail "Expected only $ALL_FUNCS"
  83 fi
  84
  85 echo "$FUNC1:traceoff" > set_ftrace_filter
  86 if check_set_ftrace_filter "$ALL_FUNCS" "$FUNC1:traceoff:unlimited"; then
  87     fail "Expected $ALL_FUNCS and $FUNC1:traceoff:unlimited"
  88 fi
  89
  90 echo "$FUNC1" > set_ftrace_filter
  91 if check_set_ftrace_filter "$FUNC1" "$FUNC1:traceoff:unlimited"; then
  92     fail "Expected $FUNC1 and $FUNC1:traceoff:unlimited"
  93 fi
  94
  95 echo "$FUNC2" >> set_ftrace_filter
  96 if check_set_ftrace_filter "$FUNC1" "$FUNC2" "$FUNC1:traceoff:unlimited"; then
  97     fail "Expected $FUNC1 $FUNC2 and $FUNC1:traceoff:unlimited"
  98 fi
  99
 100 echo "$FUNC2:traceoff" >> set_ftrace_filter
 101 if check_set_ftrace_filter "$FUNC1" "$FUNC2" "$FUNC1:traceoff:unlimited" "$FUNC2:traceoff:unlimited"; then
 102     fail "Expected $FUNC1 $FUNC2 $FUNC1:traceoff:unlimited and $FUNC2:traceoff:unlimited"
 103 fi
 104
 105 echo "$FUNC1" > set_ftrace_filter
 106 if check_set_ftrace_filter "$FUNC1" "$FUNC1:traceoff:unlimited" "$FUNC2:traceoff:unlimited"; then
 107     fail "Expected $FUNC1 $FUNC1:traceoff:unlimited and $FUNC2:traceoff:unlimited"
 108 fi
 109
 110 echo > set_ftrace_filter
 111 if check_set_ftrace_filter "$ALL_FUNCS" "$FUNC1:traceoff:unlimited" "$FUNC2:traceoff:unlimited"; then
 112     fail "Expected $ALL_FUNCS $FUNC1:traceoff:unlimited and $FUNC2:traceoff:unlimited"
 113 fi
 114
 115 reset_ftrace_filter
 116
 117 if check_set_ftrace_filter "$ALL_FUNCS"; then
 118     fail "Expected $ALL_FUNCS"
 119 fi
 120
 121 echo "$FUNC1" > set_ftrace_filter
 122 if check_set_ftrace_filter "$FUNC1" ; then
 123     fail "Expected $FUNC1"
 124 fi
 125
 126 echo "$FUNC2" >> set_ftrace_filter
 127 if check_set_ftrace_filter "$FUNC1" "$FUNC2" ; then
 128     fail "Expected $FUNC1 and $FUNC2"
 129 fi
 130
 131 test_actual() { # Compares $TMPDIR/expected with set_ftrace_filter
 132     cat set_ftrace_filter | grep -v '#' | cut -d' ' -f1 | cut -d':' -f1 | sort -u > $TMPDIR/actual
 133     DIFF=`diff $TMPDIR/actual $TMPDIR/expected`
 134     test -z "$DIFF"
 135 }
 136
 137 # Set traceoff trigger for all fuctions with "lock" in their name
 138 cat available_filter_functions | cut -d' ' -f1 |  grep 'lock' | sort -u > $TMPDIR/expected
 139 echo '*lock*:traceoff' > set_ftrace_filter
 140 test_actual
 141
 142 # now remove all with 'try' in it, and end with lock
 143 grep -v 'try.*lock$' $TMPDIR/expected > $TMPDIR/expected2
 144 mv $TMPDIR/expected2 $TMPDIR/expected
 145 echo '!*try*lock:traceoff' >> set_ftrace_filter
 146 test_actual
 147
 148 # remove all that start with "m" and end with "lock"
 149 grep -v '^m.*lock$' $TMPDIR/expected > $TMPDIR/expected2
 150 mv $TMPDIR/expected2 $TMPDIR/expected
 151 echo '!m*lock:traceoff' >> set_ftrace_filter
 152 test_actual
 153
 154 # remove all that start with "c" and have "unlock"
 155 grep -v '^c.*unlock' $TMPDIR/expected > $TMPDIR/expected2
 156 mv $TMPDIR/expected2 $TMPDIR/expected
 157 echo '!c*unlock*:traceoff' >> set_ftrace_filter
 158 test_actual
 159
 160 # clear all the rest
 161 > $TMPDIR/expected
 162 echo '!*:traceoff' >> set_ftrace_filter
 163 test_actual
 164
 165 rm $TMPDIR/expected
 166 rm $TMPDIR/actual
 167
 168 do_reset
 169
 170 exit 0