scripts/coccicheck

   1 #!/bin/bash
   2 # Linux kernel coccicheck
   3 #
   4 # Read Documentation/dev-tools/coccinelle.rst
   5 #
   6 # This script requires at least spatch
   7 # version 1.0.0-rc11.
   8
   9 DIR="$(dirname $(readlink -f $0))/.."
  10 SPATCH="`which ${SPATCH:=spatch}`"
  11
  12 if [ ! -x "$SPATCH" ]; then
  13     echo 'spatch is part of the Coccinelle project and is available at http://coccinelle.lip6.fr/'
  14     exit 1
  15 fi
  16
  17 SPATCH_VERSION=$($SPATCH --version | head -1 | awk '{print $3}')
  18 SPATCH_VERSION_NUM=$(echo $SPATCH_VERSION | ${DIR}/scripts/ld-version.sh)
  19
  20 USE_JOBS="no"
  21 $SPATCH --help | grep "\-\-jobs" > /dev/null && USE_JOBS="yes"
  22
  23 # The verbosity may be set by the environmental parameter V=
  24 # as for example with 'make V=1 coccicheck'
  25
  26 if [ -n "$V" -a "$V" != "0" ]; then
  27         VERBOSE="$V"
  28 else
  29         VERBOSE=0
  30 fi
  31
  32 if [ -z "$J" ]; then
  33         NPROC=$(getconf _NPROCESSORS_ONLN)
  34 else
  35         NPROC="$J"
  36 fi
  37
  38 FLAGS="--very-quiet"
  39
  40 # You can use SPFLAGS to append extra arguments to coccicheck or override any
  41 # heuristics done in this file as Coccinelle accepts the last options when
  42 # options conflict.
  43 #
  44 # A good example for use of SPFLAGS is if you want to debug your cocci script,
  45 # you can for instance use the following:
  46 #
  47 # $ export COCCI=scripts/coccinelle/misc/irqf_oneshot.cocci
  48 # $ make coccicheck MODE=report DEBUG_FILE="all.err" SPFLAGS="--profile --show-trying" M=./drivers/mfd/arizona-irq.c
  49 #
  50 # "--show-trying" should show you what rule is being processed as it goes to
  51 # stdout, you do not need a debug file for that. The profile output will be
  52 # be sent to stdout, if you provide a DEBUG_FILE the profiling data can be
  53 # inspected there.
  54 #
  55 # --profile will not output if --very-quiet is used, so avoid it.
  56 echo $SPFLAGS | egrep -e "--profile|--show-trying" 2>&1 > /dev/null
  57 if [ $? -eq 0 ]; then
  58         FLAGS="--quiet"
  59 fi
  60
  61 # spatch only allows include directories with the syntax "-I include"
  62 # while gcc also allows "-Iinclude" and "-include include"
  63 COCCIINCLUDE=${LINUXINCLUDE//-I/-I }
  64 COCCIINCLUDE=${COCCIINCLUDE// -include/ --include}
  65
  66 if [ "$C" = "1" -o "$C" = "2" ]; then
  67     ONLINE=1
  68
  69     # Take only the last argument, which is the C file to test
  70     shift $(( $# - 1 ))
  71     OPTIONS="$COCCIINCLUDE $1"
  72 else
  73     ONLINE=0
  74     if [ "$KBUILD_EXTMOD" = "" ] ; then
  75         OPTIONS="--dir $srctree $COCCIINCLUDE"
  76     else
  77         OPTIONS="--dir $KBUILD_EXTMOD $COCCIINCLUDE"
  78     fi
  79 fi
  80
  81 if [ "$KBUILD_EXTMOD" != "" ] ; then
  82     OPTIONS="--patch $srctree $OPTIONS"
  83 fi
  84
  85 # You can override by using SPFLAGS
  86 if [ "$USE_JOBS" = "no" ]; then
  87         trap kill_running SIGTERM SIGINT
  88         declare -a SPATCH_PID
  89 elif [ "$NPROC" != "1" ]; then
  90         # Using 0 should work as well, refer to _SC_NPROCESSORS_ONLN use on
  91         # https://github.com/rdicosmo/parmap/blob/master/setcore_stubs.c
  92         OPTIONS="$OPTIONS --jobs $NPROC --chunksize 1"
  93 fi
  94
  95 if [ "$MODE" = "" ] ; then
  96     if [ "$ONLINE" = "0" ] ; then
  97         echo 'You have not explicitly specified the mode to use. Using default "report" mode.'
  98         echo 'Available modes are the following: patch, report, context, org'
  99         echo 'You can specify the mode with "make coccicheck MODE=<mode>"'
 100         echo 'Note however that some modes are not implemented by some semantic patches.'
 101     fi
 102     MODE="report"
 103 fi
 104
 105 if [ "$MODE" = "chain" ] ; then
 106     if [ "$ONLINE" = "0" ] ; then
 107         echo 'You have selected the "chain" mode.'
 108         echo 'All available modes will be tried (in that order): patch, report, context, org'
 109     fi
 110 elif [ "$MODE" = "report" -o "$MODE" = "org" ] ; then
 111     FLAGS="--no-show-diff $FLAGS"
 112 fi
 113
 114 if [ "$ONLINE" = "0" ] ; then
 115     echo ''
 116     echo 'Please check for false positives in the output before submitting a patch.'
 117     echo 'When using "patch" mode, carefully review the patch before submitting it.'
 118     echo ''
 119 fi
 120
 121 run_cmd_parmap() {
 122         if [ $VERBOSE -ne 0 ] ; then
 123                 echo "Running ($NPROC in parallel): $@"
 124         fi
 125         if [ "$DEBUG_FILE" != "/dev/null" -a "$DEBUG_FILE" != "" ]; then
 126                 if [ -f $DEBUG_FILE ]; then
 127                         echo "Debug file $DEBUG_FILE exists, bailing"
 128                         exit
 129                 fi
 130         else
 131                 DEBUG_FILE="/dev/null"
 132         fi
 133         $@ 2>$DEBUG_FILE
 134         if [[ $? -ne 0 ]]; then
 135                 echo "coccicheck failed"
 136                 exit $?
 137         fi
 138 }
 139
 140 run_cmd_old() {
 141         local i
 142         if [ $VERBOSE -ne 0 ] ; then
 143                 echo "Running ($NPROC in parallel): $@"
 144         fi
 145         for i in $(seq 0 $(( NPROC - 1)) ); do
 146                 eval "$@ --max $NPROC --index $i &"
 147                 SPATCH_PID[$i]=$!
 148                 if [ $VERBOSE -eq 2 ] ; then
 149                         echo "${SPATCH_PID[$i]} running"
 150                 fi
 151         done
 152         wait
 153 }
 154
 155 run_cmd() {
 156         if [ "$USE_JOBS" = "yes" ]; then
 157                 run_cmd_parmap $@
 158         else
 159                 run_cmd_old $@
 160         fi
 161 }
 162
 163 kill_running() {
 164         for i in $(seq 0 $(( NPROC - 1 )) ); do
 165                 if [ $VERBOSE -eq 2 ] ; then
 166                         echo "Killing ${SPATCH_PID[$i]}"
 167                 fi
 168                 kill ${SPATCH_PID[$i]} 2>/dev/null
 169         done
 170 }
 171
 172 # You can override heuristics with SPFLAGS, these must always go last
 173 OPTIONS="$OPTIONS $SPFLAGS"
 174
 175 coccinelle () {
 176     COCCI="$1"
 177
 178     OPT=`grep "Option" $COCCI | cut -d':' -f2`
 179     REQ=`grep "Requires" $COCCI | cut -d':' -f2 | sed "s| ||"`
 180     REQ_NUM=$(echo $REQ | ${DIR}/scripts/ld-version.sh)
 181     if [ "$REQ_NUM" != "0" ] ; then
 182             if [ "$SPATCH_VERSION_NUM" -lt "$REQ_NUM" ] ; then
 183                     echo "Skipping coccinele SmPL patch: $COCCI"
 184                     echo "You have coccinelle:           $SPATCH_VERSION"
 185                     echo "This SmPL patch requires:      $REQ"
 186                     return
 187             fi
 188     fi
 189
 190 #   The option '--parse-cocci' can be used to syntactically check the SmPL files.
 191 #
 192 #    $SPATCH -D $MODE $FLAGS -parse_cocci $COCCI $OPT > /dev/null
 193
 194     if [ $VERBOSE -ne 0 -a $ONLINE -eq 0 ] ; then
 195
 196         FILE=`echo $COCCI | sed "s|$srctree/||"`
 197
 198         echo "Processing `basename $COCCI`"
 199         echo "with option(s) \"$OPT\""
 200         echo ''
 201         echo 'Message example to submit a patch:'
 202
 203         sed -ne 's|^///||p' $COCCI
 204
 205         if [ "$MODE" = "patch" ] ; then
 206             echo ' The semantic patch that makes this change is available'
 207         elif [ "$MODE" = "report" ] ; then
 208             echo ' The semantic patch that makes this report is available'
 209         elif [ "$MODE" = "context" ] ; then
 210             echo ' The semantic patch that spots this code is available'
 211         elif [ "$MODE" = "org" ] ; then
 212             echo ' The semantic patch that makes this Org report is available'
 213         else
 214             echo ' The semantic patch that makes this output is available'
 215         fi
 216         echo " in $FILE."
 217         echo ''
 218         echo ' More information about semantic patching is available at'
 219         echo ' http://coccinelle.lip6.fr/'
 220         echo ''
 221
 222         if [ "`sed -ne 's|^//#||p' $COCCI`" ] ; then
 223             echo 'Semantic patch information:'
 224             sed -ne 's|^//#||p' $COCCI
 225             echo ''
 226         fi
 227     fi
 228
 229     if [ "$MODE" = "chain" ] ; then
 230         run_cmd $SPATCH -D patch   \
 231                 $FLAGS --cocci-file $COCCI $OPT $OPTIONS               || \
 232         run_cmd $SPATCH -D report  \
 233                 $FLAGS --cocci-file $COCCI $OPT $OPTIONS --no-show-diff || \
 234         run_cmd $SPATCH -D context \
 235                 $FLAGS --cocci-file $COCCI $OPT $OPTIONS               || \
 236         run_cmd $SPATCH -D org     \
 237                 $FLAGS --cocci-file $COCCI $OPT $OPTIONS --no-show-diff || exit 1
 238     elif [ "$MODE" = "rep+ctxt" ] ; then
 239         run_cmd $SPATCH -D report  \
 240                 $FLAGS --cocci-file $COCCI $OPT $OPTIONS --no-show-diff && \
 241         run_cmd $SPATCH -D context \
 242                 $FLAGS --cocci-file $COCCI $OPT $OPTIONS || exit 1
 243     else
 244         run_cmd $SPATCH -D $MODE   $FLAGS --cocci-file $COCCI $OPT $OPTIONS || exit 1
 245     fi
 246
 247 }
 248
 249 if [ "$COCCI" = "" ] ; then
 250     for f in `find $srctree/scripts/coccinelle/ -name '*.cocci' -type f | sort`; do
 251         coccinelle $f
 252     done
 253 else
 254     coccinelle $COCCI
 255 fi